Fixes #27

Fix maven build error

.gitignore

@@ -0,0 +1,17 @@
+
+plugins/Plugin NPC.jar
+plugins/Plugin Misc HW.jar
+plugins/Plant.jar
+plugins/Cubot.jar
+.idea/*
+mar.log
+mar.log.lck
+*.iml
+*.class
+*/target/*
+plugins/*.jar
+save.json
+Server/Server.iml
+target/*
+Server/Server.iml
+Server/src/main/java/META-INF/MANIFEST.MF

CONTRIBUTING.md

@@ -0,0 +1,19 @@
+## General guide
+
+[Collaboration guide](https://github.com/simon987/Much-Assembly-Required/wiki/Collaboration-Guide)
+
+## Before creating a pull request
+
+Here small unordered list of guidelines to read before creating a pull request
+- Use java <= 1.8 features
+- Please follow [Google's Java style guide](https://google.github.io/styleguide/javaguide.html)
+- Constants (e.g. the energy cost of an in-game action) should be loaded from config.properties
+- The project is separated into multiple modules, the `Server` module and its plugins. Plugins should 
+not depend on another plugin to compile or to run.
+(e.g. NPC plugin shouldn't import `net.simon987.biomassplugin` )
+- Use `Logmanager.LOGGER` to log messages to the console. Use `.fine()` for debugging messages and `.info()` for 
+info for more important messages 
+that are not too frequently used.
+- Do not submit a pull request for a new feature that has not been approved 
+by [simon987](https://github.com/simon987) in an Issue beforehand
+- Please state what tests have been performed in the pull request

Dockerfile

@@ -0,0 +1,7 @@
+FROM alpine:3.7
+RUN apk add --no-cache maven openjdk8
+COPY /. /app/
+WORKDIR /app
+RUN mvn package \
+    && cp Server/src/main/resources/config.properties /app/
+CMD ["java", "-jar", "/app/target/server-1.2a.jar"]

Plugin Cubot/Plugin Cubot.iml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-text:1.2" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.7" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongo-java-driver:2.10.1" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+  </component>
+</module>

Plugin Cubot/pom.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+	
+	<parent>
+		<groupId>net.simon987.server</groupId>
+		<artifactId>server_root</artifactId>
+		<version>1.2a</version>
+    </parent>
+	
+    <groupId>net.simon987.plugincubot</groupId>
+    <artifactId>plugin-cubot</artifactId>
+    <version>1.2a</version>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+
+
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+    </dependencies>
+
+
+</project>

Plugin Cubot/src/main/java/net/simon987/cubotplugin/Cubot.java

@@ -0,0 +1,308 @@
+package net.simon987.cubotplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.Memory;
+import net.simon987.server.game.*;
+import net.simon987.server.user.User;
+import org.json.simple.JSONObject;
+
+import java.util.ArrayList;
+
+public class Cubot extends GameObject implements Updatable, ControllableUnit, Programmable {
+
+    private static final char MAP_INFO = 0x0080;
+    public static final int ID = 1;
+
+    public static int TYPE_ID = 2;
+
+    private int hologram = 0;
+    private String hologramString = "";
+    private HologramMode hologramMode = HologramMode.CLEARED;
+    private HologramMode lastHologramMode = HologramMode.CLEARED;
+    private int hologramColor = 0;
+
+    /**
+     * Hit points
+     */
+    private int hp;
+    private int heldItem;
+
+    private Action currentAction = Action.IDLE;
+    private Action lastAction = Action.IDLE;
+
+    private ArrayList<Integer> keyboardBuffer = new ArrayList<>();
+
+    private ArrayList<char[]> consoleMessagesBuffer = new ArrayList<>(CONSOLE_BUFFER_MAX_SIZE);
+    private ArrayList<char[]> lastConsoleMessagesBuffer = new ArrayList<>(CONSOLE_BUFFER_MAX_SIZE);
+    private ConsoleMode consoleMode = ConsoleMode.NORMAL;
+    private ConsoleMode lastConsoleMode = ConsoleMode.NORMAL;
+
+    private User parent;
+
+    private int energy;
+    private int maxEnergy;
+
+    private static final float SOLAR_PANEL_MULTIPLIER = 1;
+    private static final int CONSOLE_BUFFER_MAX_SIZE = 40;
+
+    public Cubot() {
+
+    }
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        storeEnergy((int) (SOLAR_PANEL_MULTIPLIER * GameServer.INSTANCE.getDayNightCycle().getSunIntensity()));
+
+        if (currentAction == Action.WALKING) {
+            if (spendEnergy(100)) {
+                if (!incrementLocation()) {
+                    //Couldn't walk
+                    currentAction = Action.IDLE;
+                }
+            } else {
+                currentAction = Action.IDLE;
+            }
+        }
+
+        /*
+         * CurrentAction is set during the code execution and this function is called right after
+         * If no action as been set, the action sent to the client is the action in currentAction that
+         * was set last tick (IDLE)
+         */
+        lastAction = currentAction;
+        currentAction = Action.IDLE;
+
+        //Same principle for hologram
+        lastHologramMode = hologramMode;
+        hologramMode = HologramMode.CLEARED;
+
+        //And the console
+        lastConsoleMode = consoleMode;
+        consoleMode = ConsoleMode.NORMAL;
+
+        lastConsoleMessagesBuffer = new ArrayList<>(consoleMessagesBuffer);
+        consoleMessagesBuffer.clear();
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("i", getObjectId());
+        json.put("t", ID);
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("direction", getDirection().ordinal());
+        json.put("heldItem", heldItem);
+        json.put("hp", hp);
+        json.put("action", lastAction.ordinal());
+        json.put("holo", hologram);
+        json.put("holoStr", hologramString);
+        json.put("holoMode", lastHologramMode.ordinal());
+        json.put("holoC", hologramColor);
+        json.put("energy", energy);
+
+        if (parent != null) {
+            json.put("parent", parent.getUsername()); //Only used client-side for now
+        }
+
+        return json;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("i", getObjectId());
+        dbObject.put("t", ID);
+        dbObject.put("x", getX());
+        dbObject.put("y", getY());
+        dbObject.put("direction", getDirection().ordinal());
+        dbObject.put("heldItem", heldItem);
+        dbObject.put("hp", hp);
+        dbObject.put("action", lastAction.ordinal());
+        dbObject.put("holo", hologram);
+        dbObject.put("holoStr", hologramString);
+        dbObject.put("holoMode", lastHologramMode.ordinal());
+        dbObject.put("holoC", hologramColor);
+        dbObject.put("energy", energy);
+
+        if (parent != null) {
+            dbObject.put("parent", parent.getUsername()); //Only used client-side for now
+        }
+
+        return dbObject;
+    }
+
+    public static Cubot deserialize(DBObject obj) {
+
+        Cubot cubot = new Cubot();
+        cubot.setObjectId((long) obj.get("i"));
+        cubot.setX((int) obj.get("x"));
+        cubot.setY((int) obj.get("y"));
+        cubot.hp = (int) obj.get("hp");
+        cubot.setDirection(Direction.getDirection((int) obj.get("direction")));
+        cubot.heldItem = (int) obj.get("heldItem");
+        cubot.energy = (int) obj.get("energy");
+        cubot.maxEnergy = GameServer.INSTANCE.getConfig().getInt("battery_max_energy");
+
+        return cubot;
+
+    }
+
+    public void setHeldItem(int heldItem) {
+        this.heldItem = heldItem;
+    }
+
+    public int getHeldItem() {
+        return heldItem;
+    }
+
+    @Override
+    public void setKeyboardBuffer(ArrayList<Integer> kbBuffer) {
+        keyboardBuffer = kbBuffer;
+    }
+
+    @Override
+    public ArrayList<Integer> getKeyboardBuffer() {
+        return keyboardBuffer;
+    }
+
+    public void clearKeyboardBuffer() {
+        keyboardBuffer.clear();
+    }
+
+    public void setCurrentAction(Action currentAction) {
+        this.currentAction = currentAction;
+    }
+
+    public User getParent() {
+        return parent;
+    }
+
+    public void setParent(User parent) {
+        this.parent = parent;
+    }
+
+    public Action getAction() {
+        return lastAction;
+    }
+
+    public Action getCurrentAction() {
+        return currentAction;
+    }
+
+    public void setHologram(int hologram) {
+        this.hologram = hologram;
+    }
+
+
+    public void setHologramString(String hologramString) {
+        this.hologramString = hologramString;
+    }
+
+    public int getEnergy() {
+        return energy;
+    }
+
+    public void setEnergy(int energy) {
+        this.energy = energy;
+    }
+
+    public boolean spendEnergy(int spent) {
+
+        if (energy - spent < 0) {
+            return false;
+        } else {
+            energy -= spent;
+            return true;
+        }
+    }
+
+    public void storeEnergy(int qty) {
+
+        energy = Math.min(energy + qty, maxEnergy);
+
+    }
+
+    public void setMaxEnergy(int maxEnergy) {
+        this.maxEnergy = maxEnergy;
+    }
+
+    public int getMaxEnergy() {
+        return maxEnergy;
+    }
+
+    @Override
+    public Memory getFloppyData() {
+
+        CubotFloppyDrive drive = ((CubotFloppyDrive) getParent().getCpu().getHardware(CubotFloppyDrive.DEFAULT_ADDRESS));
+
+        if (drive.getFloppy() != null) {
+            return drive.getFloppy().getMemory();
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public boolean isAt(int x, int y) {
+        return false;
+    }
+
+    public void setHologramMode(HologramMode hologramMode) {
+        this.hologramMode = hologramMode;
+    }
+
+    public enum HologramMode {
+        CLEARED,
+        HEX,
+        STRING,
+        DEC
+    }
+
+    public enum ConsoleMode {
+        CLEAR,
+        NORMAL
+    }
+
+    @Override
+    public void setAction(Action action) {
+        currentAction = action;
+    }
+
+    @Override
+    public boolean sendMessage(char[] message) {
+
+        if (consoleMessagesBuffer.size() < CONSOLE_BUFFER_MAX_SIZE) {
+            consoleMessagesBuffer.add(message);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public ArrayList<char[]> getConsoleMessagesBuffer() {
+        return lastConsoleMessagesBuffer;
+    }
+
+
+    public int getConsoleMode() {
+        return lastConsoleMode.ordinal();
+    }
+
+    public void setConsoleMode(ConsoleMode consoleMode) {
+        this.consoleMode = consoleMode;
+    }
+
+    public void setHologramColor(int hologramColor) {
+        this.hologramColor = hologramColor;
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotBattery.java

@@ -1,9 +1,10 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
 
 public class CubotBattery extends CpuHardware {
 
@@ -15,8 +16,8 @@ public class CubotBattery extends CpuHardware {
     public static final char HWID = 0x000A;
 
     private Cubot cubot;
-    private static final int POLL = 1;
-    private static final int GET_MAX_CAPACITY = 2;
+    private static final int BATTERY_POLL = 1;
+    private static final int BATTERY_GET_MAX_CAPACITY = 2;
 
     public CubotBattery(Cubot cubot) {
         this.cubot = cubot;
@@ -27,10 +28,10 @@ public class CubotBattery extends CpuHardware {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if (a == POLL) {
+        if (a == BATTERY_POLL) {
             getCpu().getRegisterSet().getRegister("B").setValue(cubot.getEnergy());
 
-        } else if (a == GET_MAX_CAPACITY) {
+        } else if (a == BATTERY_GET_MAX_CAPACITY) {
             getCpu().getRegisterSet().getRegister("B").setValue(cubot.getMaxEnergy());
         } else if (a == 0xFFFF) {
             cubot.setEnergy(cubot.getMaxEnergy());
@@ -44,16 +45,19 @@ public class CubotBattery extends CpuHardware {
     }
 
     @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+    public BasicDBObject mongoSerialise() {
 
-        return json;
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
     }
 
-    public static CubotBattery deserialize(JSONObject hwJSON) {
-        return new CubotBattery((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+
+    public static CubotBattery deserialize(DBObject obj) {
+        return new CubotBattery((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotComPort.java

@@ -0,0 +1,144 @@
+package net.simon987.cubotplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.Programmable;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+public class CubotComPort extends CpuHardware {
+
+    public static final char HWID = 0xD;
+    public static final int DEFAULT_ADDRESS = 0xD;
+
+    private Cubot cubot;
+
+    private static final int COMPORT_BUFFER_CLEAR = 0;
+    private static final int COMPORT_POLL = 1;
+    private static final int COMPORT_FRONT_PORT_OUT = 2;
+    private static final int COMPORT_SELF_OUT = 3;
+    private static final int COMPORT_CONSOLE_CLEAR = 4;
+
+    public CubotComPort(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+    private static final int MESSAGE_LENGTH = 8;
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        int a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        if (a == COMPORT_BUFFER_CLEAR) {
+
+            cubot.getConsoleMessagesBuffer().clear();
+            
+        } else if (a == COMPORT_CONSOLE_CLEAR) {
+            
+            cubot.setConsoleMode(Cubot.ConsoleMode.CLEAR);
+
+        } else if (a == COMPORT_POLL) {
+
+            if (cubot.spendEnergy(4)) {
+
+                int x = getCpu().getRegisterSet().getRegister("X").getValue();
+
+                //Read all messages in the console buffer to memory at X
+
+                for (char[] message : cubot.getConsoleMessagesBuffer()) {
+                    if (x + MESSAGE_LENGTH >= getCpu().getMemory().getWords().length) {
+                        //todo set interrupt ?
+                        getCpu().getStatus().setErrorFlag(true);
+                    } else {
+                        System.arraycopy(message, 0, getCpu().getMemory().getWords(), x, MESSAGE_LENGTH);
+                    }
+                }
+
+                //Set B = number of messages
+                getCpu().getRegisterSet().getRegister("B").setValue(cubot.getConsoleMessagesBuffer().size());
+
+            }
+
+        } else if (a == COMPORT_FRONT_PORT_OUT) {
+
+            if (cubot.spendEnergy(20)) {
+                //Get object directly in front of the Cubot
+                Point frontTile = cubot.getFrontTile();
+                //Todo will have to add getGameObjectsBlockingAt to enable Factory
+                ArrayList<GameObject> objects = cubot.getWorld().getGameObjectsAt(frontTile.x, frontTile.y);
+
+                if (objects.size() > 0 && objects.get(0) instanceof Programmable) {
+
+                    int x = getCpu().getRegisterSet().getRegister("X").getValue();
+
+                    if (x + MESSAGE_LENGTH >= getCpu().getMemory().getWords().length) {
+                        //todo set interrupt ?
+                        getCpu().getStatus().setErrorFlag(true);
+                    } else {
+
+                        //Get MESSAGE_LENGTH-word message pointed by X
+                        char[] message = new char[MESSAGE_LENGTH];
+                        System.arraycopy(getCpu().getMemory().getWords(), x, message, 0, MESSAGE_LENGTH);
+
+                        //Send it to the Programmable object
+                        getCpu().getRegisterSet().getRegister("B").setValue(
+                                ((Programmable) objects.get(0)).sendMessage(message) ? 1 : 0);
+                        return;
+                    }
+                }
+            }
+
+            getCpu().getRegisterSet().getRegister("B").setValue(0); //Failed
+
+        } else if (a == COMPORT_SELF_OUT) {
+
+            if (cubot.spendEnergy(1)) {
+
+                int x = getCpu().getRegisterSet().getRegister("X").getValue();
+
+                //Write a single message to console buffer
+                if (x + MESSAGE_LENGTH >= getCpu().getMemory().getWords().length) {
+                    //todo set interrupt ?
+                    getCpu().getStatus().setErrorFlag(true);
+                } else {
+
+                    //Get MESSAGE_LENGTH-word message pointed by X
+                    char[] message = new char[MESSAGE_LENGTH];
+                    System.arraycopy(getCpu().getMemory().getWords(), x, message, 0, MESSAGE_LENGTH);
+                    getCpu().getRegisterSet().getRegister("B").setValue(cubot.sendMessage(message) ? 1 : 0);
+                    return;
+                }
+            }
+
+            getCpu().getRegisterSet().getRegister("B").setValue(0); //Failed
+        }
+
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
+    }
+
+    public static CubotComPort deserialize(DBObject obj) {
+        return new CubotComPort((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotDrill.java

@@ -1,10 +1,12 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
 import net.simon987.server.game.TileMap;
-import org.json.simple.JSONObject;
 
 public class CubotDrill extends CpuHardware {
 
@@ -15,9 +17,8 @@ public class CubotDrill extends CpuHardware {
 
     public static final int DEFAULT_ADDRESS = 5;
 
-    private static final int POLL = 1;
-    private static final int GATHER_SLOW = 2;
-    private static final int GATHER_FAST = 3;
+    private static final int DRILL_POLL = 1;
+    private static final int DRILL_GATHER = 2; // simplified gather
 
     private Cubot cubot;
 
@@ -34,23 +35,23 @@ public class CubotDrill extends CpuHardware {
     public void handleInterrupt(Status status) {
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if (a == POLL) {
+        if (a == DRILL_POLL) {
 
             getCpu().getRegisterSet().getRegister("B").setValue(0);
 
-        } else if (a == GATHER_SLOW || a == GATHER_FAST) {
+        } else if (a == DRILL_GATHER) {
 
             if (cubot.spendEnergy(1400)) {
-                if (cubot.getAction() == CubotAction.IDLE) {
+                if (cubot.getCurrentAction() == Action.IDLE) {
                     int tile = cubot.getWorld().getTileMap().getTileAt(cubot.getX(), cubot.getY());
 
                     if (tile == TileMap.IRON_TILE) {
                         cubot.setHeldItem(TileMap.ITEM_IRON);
-                        cubot.setCurrentAction(CubotAction.DIGGING);
+                        cubot.setCurrentAction(Action.DIGGING);
 
                     } else if (tile == TileMap.COPPER_TILE) {
                         cubot.setHeldItem(TileMap.ITEM_COPPER);
-                        cubot.setCurrentAction(CubotAction.DIGGING);
+                        cubot.setCurrentAction(Action.DIGGING);
 
                     }
                 }
@@ -61,15 +62,17 @@ public class CubotDrill extends CpuHardware {
     }
 
     @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+    public BasicDBObject mongoSerialise() {
 
-        return json;
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
     }
 
-    public static CubotDrill deserialize(JSONObject hwJSON){
-        return new CubotDrill((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotDrill deserialize(DBObject obj) {
+        return new CubotDrill((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotFloppyDrive.java

@@ -1,9 +1,10 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
 
 public class CubotFloppyDrive extends CpuHardware {
 
@@ -14,22 +15,24 @@ public class CubotFloppyDrive extends CpuHardware {
 
     public static final int DEFAULT_ADDRESS = 0x000B;
 
-    private static final int POLL = 1;
-    private static final int READ_SECTOR = 2;
-    private static final int WRITE_SECTOR = 3;
+    private static final int FLOPPY_POLL = 1;
+    private static final int FLOPPY_READ_SECTOR = 2;
+    private static final int FLOPPY_WRITE_SECTOR = 3;
 
     private Cubot cubot;
     private FloppyDisk floppyDisk;
 
     public CubotFloppyDrive(Cubot cubot) {
         this.cubot = cubot;
+
+        floppyDisk = new FloppyDisk();
     }
 
     @Override
     public void handleInterrupt(Status status) {
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if (a == POLL) {
+        if (a == FLOPPY_POLL) {
 
             if (floppyDisk != null) {
                 getCpu().getRegisterSet().getRegister("B").setValue(0);
@@ -37,7 +40,7 @@ public class CubotFloppyDrive extends CpuHardware {
                 getCpu().getRegisterSet().getRegister("B").setValue(1);
             }
 
-        } else if (a == READ_SECTOR) {
+        } else if (a == FLOPPY_READ_SECTOR) {
 
             if (floppyDisk == null) {
                 getCpu().getRegisterSet().getRegister("B").setValue(0);
@@ -53,7 +56,7 @@ public class CubotFloppyDrive extends CpuHardware {
             }
 
 
-        } else if (a == WRITE_SECTOR) {
+        } else if (a == FLOPPY_WRITE_SECTOR) {
             if (floppyDisk == null) {
                 getCpu().getRegisterSet().getRegister("B").setValue(0);
             } else {
@@ -76,26 +79,26 @@ public class CubotFloppyDrive extends CpuHardware {
     }
 
     @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
 
         if (floppyDisk != null) {
-            json.put("floppy", floppyDisk.serialise());
+            dbObject.put("floppy", floppyDisk.mongoSerialise());
         }
 
-        return json;
+        return dbObject;
     }
 
-    public static CubotFloppyDrive deserialize(JSONObject hwJSON) {
+    public static CubotFloppyDrive deserialize(DBObject obj) {
 
-        CubotFloppyDrive drive = new CubotFloppyDrive((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+        CubotFloppyDrive drive = new CubotFloppyDrive((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
 
-        if (hwJSON.containsKey("floppy")) {
-            drive.floppyDisk = FloppyDisk.deserialise((JSONObject) hwJSON.get("floppy"));
-        } else {
-            drive.floppyDisk = new FloppyDisk();
+        if (obj.containsField("floppy")) {
+            drive.floppyDisk = FloppyDisk.deserialise((DBObject) obj.get("floppy"));
         }
 
         return drive;

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotHologram.java

@@ -0,0 +1,101 @@
+package net.simon987.cubotplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+
+public class CubotHologram extends CpuHardware {
+
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    static final char HWID = 0x0009;
+
+    public static final int DEFAULT_ADDRESS = 9;
+
+    private Cubot cubot;
+
+    private static final int HOLO_CLEAR = 0;
+    private static final int HOLO_DISPLAY_HEX = 1;
+    private static final int HOLO_DISPLAY_STRING = 2;
+    private static final int HOLO_DISPLAY_DEC = 3;
+    private static final int HOLO_DISPLAY_COLOR = 4;
+
+    private static final int STR_MAX_LEN = 8;
+
+    public CubotHologram(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        char a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        if (a == HOLO_CLEAR) {
+            cubot.setHologramMode(Cubot.HologramMode.CLEARED);
+        } else if (a == HOLO_DISPLAY_HEX) {
+            char b = getCpu().getRegisterSet().getRegister("B").getValue();
+            cubot.setHologram(b);
+            cubot.setHologramMode(Cubot.HologramMode.HEX);
+        } else if (a == HOLO_DISPLAY_STRING) {
+            char x = getCpu().getRegisterSet().getRegister("X").getValue();
+            //Display zero-terminated string starting at X (max 8 chars)
+
+            StringBuilder holoString = new StringBuilder();
+
+            for (int i = 0; i < STR_MAX_LEN; i++) {
+
+                char nextChar = (char) getCpu().getMemory().get(x + i);
+
+                if (nextChar != 0) {
+                    holoString.append((char) getCpu().getMemory().get(x + i));
+                } else {
+                    break;
+                }
+            }
+
+            cubot.setHologramString(holoString.toString());
+            cubot.setHologramMode(Cubot.HologramMode.STRING);
+        } else if (a == HOLO_DISPLAY_DEC) {
+            //Display decimal number
+            char b = getCpu().getRegisterSet().getRegister("B").getValue();
+            cubot.setHologram(b);
+            cubot.setHologramMode(Cubot.HologramMode.DEC);
+
+        } else if (a == HOLO_DISPLAY_COLOR) {
+
+            if (cubot.spendEnergy(4)) {
+                int b = getCpu().getRegisterSet().getRegister("B").getValue();
+                int c = getCpu().getRegisterSet().getRegister("C").getValue();
+
+                cubot.setHologramColor((c | (b << 16))); //B:C
+            }
+        }
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    public static CubotHologram deserialize(DBObject obj) {
+        return new CubotHologram((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
+    }
+
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotInventory.java

@@ -1,9 +1,10 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
 
 public class CubotInventory extends CpuHardware {
 
@@ -16,8 +17,8 @@ public class CubotInventory extends CpuHardware {
 
     private Cubot cubot;
 
-    private static final int POLL = 1;
-    private static final int CLEAR = 2;
+    private static final int INV_CLEAR = 0;
+    private static final int INV_POLL = 1;
 
     public CubotInventory(Cubot cubot) {
         this.cubot = cubot;
@@ -33,29 +34,35 @@ public class CubotInventory extends CpuHardware {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if(a == POLL) {
-
+        if (a == INV_POLL) {
             getCpu().getRegisterSet().getRegister("B").setValue(cubot.getHeldItem());
 
-        } else if (a == CLEAR) {
-            if (cubot.spendEnergy(100)) {
+        } else if (a == INV_CLEAR) {
+            if (cubot.getHeldItem() == 0x0001) {
+                int energy = GameServer.INSTANCE.getConfig().getInt("biomassEnergyValue");
+                cubot.storeEnergy(energy);
+                cubot.setHeldItem(0);
+
+            } else if (cubot.spendEnergy(100)) {
                 cubot.setHeldItem(0);
             }
         }
 
     }
 
+
     @Override
-    public JSONObject serialise() {
+    public BasicDBObject mongoSerialise() {
 
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+        BasicDBObject dbObject = new BasicDBObject();
 
-        return json;
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
     }
 
-    public static CubotInventory deserialize(JSONObject hwJSON){
-        return new CubotInventory((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotInventory deserialize(DBObject obj) {
+        return new CubotInventory((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotKeyboard.java

@@ -1,17 +1,18 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
 
-public class Keyboard extends CpuHardware {
+public class CubotKeyboard extends CpuHardware {
 
     public static final int DEFAULT_ADDRESS = 4;
 
-    private static final int CLEAR_BUFFER = 0;
-    private static final int FETCH_KEY = 1;
-    
+    private static final int KEYBOARD_CLEAR_BUFFER = 0;
+    private static final int KEYBOARD_FETCH_KEY = 1;
+
     /**
      * Hardware ID (Should be unique)
      */
@@ -19,7 +20,7 @@ public class Keyboard extends CpuHardware {
 
     private Cubot cubot;
 
-    public Keyboard(Cubot cubot) {
+    public CubotKeyboard(Cubot cubot) {
         this.cubot = cubot;
     }
 
@@ -33,14 +34,14 @@ public class Keyboard extends CpuHardware {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if(a == CLEAR_BUFFER){
+        if (a == KEYBOARD_CLEAR_BUFFER) {
 
             cubot.clearKeyboardBuffer();
 
-        } else if (a == FETCH_KEY){
+        } else if (a == KEYBOARD_FETCH_KEY) {
             //pop
             int key = 0;
-            if(cubot.getKeyboardBuffer().size() > 0){
+            if (cubot.getKeyboardBuffer().size() > 0) {
                 key = cubot.getKeyboardBuffer().get(0);
                 cubot.getKeyboardBuffer().remove(0);
             }
@@ -52,16 +53,17 @@ public class Keyboard extends CpuHardware {
     }
 
     @Override
-    public JSONObject serialise() {
+    public BasicDBObject mongoSerialise() {
 
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+        BasicDBObject dbObject = new BasicDBObject();
 
-        return json;
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
     }
 
-    public static Keyboard deserialize(JSONObject hwJSON){
-        return new Keyboard((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotKeyboard deserialize(DBObject obj) {
+        return new CubotKeyboard((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLaser.java

@@ -1,11 +1,14 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
+import net.simon987.server.game.Attackable;
 import net.simon987.server.game.GameObject;
 import net.simon987.server.game.InventoryHolder;
-import org.json.simple.JSONObject;
 
 import java.awt.*;
 import java.util.ArrayList;
@@ -21,9 +24,11 @@ public class CubotLaser extends CpuHardware {
 
     private Cubot cubot;
 
-    private static final int WITHDRAW = 1;
-    private static final int DEPOSIT = 2;
+    private static final int LASER_WITHDRAW = 1;
+    private static final int LASER_DEPOSIT = 2;
+    private static final int LASER_ATTACK = 3;
 
+    private static final int LASER_DAMAGE = 25;
 
     public CubotLaser(Cubot cubot) {
         this.cubot = cubot;
@@ -41,14 +46,13 @@ public class CubotLaser extends CpuHardware {
         int b = getCpu().getRegisterSet().getRegister("B").getValue();
 
 
-        if(a == WITHDRAW) {
+        if (a == LASER_WITHDRAW) {
 
 
             Point frontTile = cubot.getFrontTile();
-            ArrayList<GameObject> objects = cubot.getWorld().getGameObjectsAt(frontTile.x, frontTile.y);
+            ArrayList<GameObject> objects = cubot.getWorld().getGameObjectsBlockingAt(frontTile.x, frontTile.y);
 
-
-            if (cubot.getAction() != CubotAction.IDLE && objects.size() > 0) {
+            if (cubot.getCurrentAction() == Action.IDLE && objects.size() > 0) {
                 //FIXME: Problem here if more than 1 object
                 if (objects.get(0) instanceof InventoryHolder) {
                     if (((InventoryHolder) objects.get(0)).canTakeItem(b)) {
@@ -57,30 +61,45 @@ public class CubotLaser extends CpuHardware {
                             ((InventoryHolder) objects.get(0)).takeItem(b);
 
                             cubot.setHeldItem(b);
-                            cubot.setCurrentAction(CubotAction.WITHDRAWING);
+                            cubot.setCurrentAction(Action.WITHDRAWING);
                         }
                     }
                 }
             }
 
 
-        } else if (a == DEPOSIT) {
+        } else if (a == LASER_DEPOSIT) {
+            // TODO
+        } else if (a == LASER_ATTACK) {
+
+            if (cubot.spendEnergy(70)) {
+                
+                //Get object directly in front of the Cubot
+                Point frontTile = cubot.getFrontTile();
+                ArrayList<GameObject> objects = cubot.getWorld().getGameObjectsAt(frontTile.x, frontTile.y);
+
+                if (objects.size() > 0 && objects.get(0) instanceof Attackable) {
+                    ((Attackable) objects.get(0)).damage(LASER_DAMAGE);
+                }
+
+            }
 
         }
 
     }
 
     @Override
-    public JSONObject serialise() {
+    public BasicDBObject mongoSerialise() {
 
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
+        BasicDBObject dbObject = new BasicDBObject();
 
-        return json;
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
     }
 
-    public static CubotLaser deserialize(JSONObject hwJSON){
-        return new CubotLaser((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotLaser deserialize(DBObject obj) {
+        return new CubotLaser((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLeg.java

@@ -0,0 +1,104 @@
+package net.simon987.cubotplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
+import net.simon987.server.game.Direction;
+import net.simon987.server.io.JSONSerialisable;
+import org.json.simple.JSONObject;
+
+public class CubotLeg extends CpuHardware implements JSONSerialisable {
+
+    public static final int DEFAULT_ADDRESS = 1;
+
+    public static final String NAME = "Cubot Leg";
+
+    private static final int LEGS_SET_DIR = 1;
+    private static final int LEGS_SET_DIR_AND_WALK = 2;
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    static final char HWID = 0x0001;
+
+    private Cubot cubot;
+
+    public CubotLeg(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        if (cubot.getCurrentAction() == Action.IDLE) {
+            int a = getCpu().getRegisterSet().getRegister("A").getValue();
+            int b = getCpu().getRegisterSet().getRegister("B").getValue();
+
+            if (a == LEGS_SET_DIR) {
+
+
+                Direction dir = Direction.getDirection(b);
+
+                if (dir != null) {
+                    if (cubot.spendEnergy(20)) {
+                        cubot.setDirection(Direction.getDirection(b));
+                        status.setErrorFlag(false);
+                    }
+                } else {
+                    status.setErrorFlag(true);
+                }
+
+
+            } else if (a == LEGS_SET_DIR_AND_WALK) {
+
+                if (cubot.getMaxEnergy() >= 100) {
+                    Direction dir = Direction.getDirection(b);
+
+                    if (dir != null) {
+                        cubot.setDirection(Direction.getDirection(b));
+                        status.setErrorFlag(false);
+                    } else {
+                        status.setErrorFlag(true);
+                    }
+
+                    cubot.setCurrentAction(Action.WALKING);
+                }
+            }
+        }
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+        json.put("cubot", cubot.getObjectId());
+
+        return json;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
+    }
+
+    public static CubotLeg deserialize(DBObject obj) {
+        return new CubotLeg((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
+    }
+
+
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLidar.java

@@ -1,7 +1,10 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Memory;
 import net.simon987.server.assembly.Status;
 import net.simon987.server.game.World;
 import net.simon987.server.game.pathfinding.Node;
@@ -23,10 +26,10 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
 
     private Cubot cubot;
 
-    private static final int GET_POS = 1;
-    private static final int GET_PATH = 2;
-    private static final int GET_MAP = 3;
-    private static final int GET_WORLD_POS = 4;
+    private static final int LIDAR_GET_POS = 1;
+    private static final int LIDAR_GET_PATH = 2;
+    private static final int LIDAR_GET_MAP = 3;
+    private static final int LIDAR_GET_WORLD_POS = 4;
 
     private static final int MEMORY_MAP_START = 0x0100;
     private static final int MEMORY_PATH_START = 0x0000;
@@ -46,12 +49,12 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        switch (a){
-            case GET_POS:
+        switch (a) {
+            case LIDAR_GET_POS:
                 getCpu().getRegisterSet().getRegister("X").setValue(cubot.getX());
                 getCpu().getRegisterSet().getRegister("Y").setValue(cubot.getY());
                 break;
-            case GET_PATH:
+            case LIDAR_GET_PATH:
                 if (cubot.spendEnergy(50)) {
                     int b = getCpu().getRegisterSet().getRegister("B").getValue();
                     int destX = getCpu().getRegisterSet().getRegister("X").getValue();
@@ -62,7 +65,7 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
                             destX, destY, b);
 
                     //Write to memory
-                    byte[] mem = getCpu().getMemory().getBytes();
+                    Memory mem = getCpu().getMemory();
 
                     int counter = MEMORY_PATH_START;
 
@@ -80,32 +83,26 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
 
                             if (n.x < lastNode.x) {
                                 //West
-                                mem[counter++] = 0;
-                                mem[counter++] = 3;
+                                mem.set(counter++, 3);
                             } else if (n.x > lastNode.x) {
                                 //East
-                                mem[counter++] = 0;
-                                mem[counter++] = 1;
+                                mem.set(counter++, 1);
                             } else if (n.y < lastNode.y) {
                                 //North
-                                mem[counter++] = 0;
-                                mem[counter++] = 0;
+                                mem.set(counter++, 0);
                             } else if (n.y > lastNode.y) {
                                 //South
-                                mem[counter++] = 0;
-                                mem[counter++] = 2;
+                                mem.set(counter++, 2);
                             }
 
                             lastNode = n;
                         }
 
                         //Indicate end of path with 0xAAAA
-                        mem[counter++] = -86;
-                        mem[counter] = -86;
+                        mem.set(counter, 0xAAAA);
                     } else {
                         //Indicate invalid path 0xFFFF
-                        mem[counter++] = -1;
-                        mem[counter] = -1;
+                        mem.set(counter, 0xFFFF);
                     }
 
                     LogManager.LOGGER.fine("DEBUG: path to" + destX + "," + destY);
@@ -113,7 +110,7 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
 
                 break;
 
-            case GET_MAP:
+            case LIDAR_GET_MAP:
                 if (cubot.spendEnergy(10)) {
                     char[][] mapInfo = cubot.getWorld().getMapInfo();
 
@@ -126,7 +123,7 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
                 }
 
                 break;
-            case GET_WORLD_POS:
+            case LIDAR_GET_WORLD_POS:
                 getCpu().getRegisterSet().getRegister("X").setValue(cubot.getWorld().getX());
                 getCpu().getRegisterSet().getRegister("Y").setValue(cubot.getWorld().getY());
                 break;
@@ -146,7 +143,18 @@ public class CubotLidar extends CpuHardware implements JSONSerialisable {
         return json;
     }
 
-    public static CubotLidar deserialize(JSONObject hwJSON) {
-        return new CubotLidar((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
+    }
+
+    public static CubotLidar deserialize(DBObject obj) {
+        return new CubotLidar((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotPlugin.java

@@ -1,20 +1,21 @@
 package net.simon987.cubotplugin;
 
+import com.mongodb.DBObject;
 import net.simon987.cubotplugin.event.CpuInitialisationListener;
 import net.simon987.cubotplugin.event.UserCreationListener;
+import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.game.GameObject;
 import net.simon987.server.io.CpuHardwareDeserializer;
 import net.simon987.server.io.GameObjectDeserializer;
 import net.simon987.server.logging.LogManager;
 import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
 
-public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer, CpuHardwareDeserializer{
+public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer, CpuHardwareDeserializer {
 
 
     @Override
-    public void init() {
+    public void init(ServerConfiguration config) {
         listeners.add(new CpuInitialisationListener());
         listeners.add(new UserCreationListener());
 
@@ -22,11 +23,11 @@ public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer,
     }
 
     @Override
-    public GameObject deserializeObject(JSONObject object) {
+    public GameObject deserializeObject(DBObject object) {
 
-        int objType = (int)(long)object.get("type");
+        int objType = (int) object.get("t");
 
-        if(objType == Cubot.ID) {
+        if (objType == Cubot.ID) {
 
             return Cubot.deserialize(object);
         }
@@ -35,28 +36,30 @@ public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer,
     }
 
     @Override
-    public CpuHardware deserializeHardware(JSONObject hwJson) {
-        int hwid = (int)(long)hwJson.get("hwid");
+    public CpuHardware deserializeHardware(DBObject obj) {
+        int hwid = (int) obj.get("hwid");
 
-        switch (hwid){
+        switch (hwid) {
             case CubotLeg.HWID:
-                return CubotLeg.deserialize(hwJson);
+                return CubotLeg.deserialize(obj);
             case CubotLaser.HWID:
-                return CubotLaser.deserialize(hwJson);
+                return CubotLaser.deserialize(obj);
             case CubotLidar.HWID:
-                return CubotLidar.deserialize(hwJson);
+                return CubotLidar.deserialize(obj);
             case CubotDrill.HWID:
-                return CubotDrill.deserialize(hwJson);
+                return CubotDrill.deserialize(obj);
             case CubotInventory.HWID:
-                return CubotInventory.deserialize(hwJson);
-            case Keyboard.HWID:
-                return Keyboard.deserialize(hwJson);
+                return CubotInventory.deserialize(obj);
+            case CubotKeyboard.HWID:
+                return CubotKeyboard.deserialize(obj);
             case CubotHologram.HWID:
-                return CubotHologram.deserialize(hwJson);
+                return CubotHologram.deserialize(obj);
             case CubotBattery.HWID:
-                return CubotBattery.deserialize(hwJson);
+                return CubotBattery.deserialize(obj);
             case CubotFloppyDrive.HWID:
-                return CubotFloppyDrive.deserialize(hwJson);
+                return CubotFloppyDrive.deserialize(obj);
+            case CubotComPort.HWID:
+                return CubotComPort.deserialize(obj);
         }
 
         return null;

Plugin Cubot/src/main/java/net/simon987/cubotplugin/FloppyDisk.java

@@ -1,16 +1,17 @@
 package net.simon987.cubotplugin;
 
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.assembly.Memory;
-import net.simon987.server.io.JSONSerialisable;
-import org.json.simple.JSONObject;
+import net.simon987.server.io.MongoSerialisable;
 
 /**
  * Represents a floppy disk that is inside a floppy drive.
  * Floppies contains 80 tracks with 18 sectors per track.
  * That's 1440 sectors of 512 words. (total 1,474,560 bytes / 737,280 words / 1.44Mb)
  */
-public class FloppyDisk implements JSONSerialisable {
+public class FloppyDisk implements MongoSerialisable {
 
     /**
      * Contents of the disk
@@ -25,7 +26,7 @@ public class FloppyDisk implements JSONSerialisable {
 
 
     public FloppyDisk() {
-        this.memory = new Memory(1024 * 1440);
+        this.memory = new Memory(512 * 1440);
     }
 
     /**
@@ -39,7 +40,7 @@ public class FloppyDisk implements JSONSerialisable {
     public boolean readSector(int sector, Memory cpuMemory, int ramAddress) {
 
         if (sector <= 1440) {
-            cpuMemory.write(ramAddress, memory.getBytes(), sector * 1024, 1024);
+            cpuMemory.write(ramAddress, memory.getWords(), sector * 512, 512);
 
             //Calculate seek time
             int deltaTrack = (sector / 80) - rwHeadTrack;
@@ -66,7 +67,7 @@ public class FloppyDisk implements JSONSerialisable {
     public boolean writeSector(int sector, Memory cpuMemory, int ramAddress) {
 
         if (sector <= 1440) {
-            memory.write(sector * 512, cpuMemory.getBytes(), ramAddress * 2, 1024);
+            memory.write(sector * 512, cpuMemory.getWords(), ramAddress, 512);
 
             //Calculate seek time
             int deltaTrack = (sector / 80) - rwHeadTrack;
@@ -82,23 +83,22 @@ public class FloppyDisk implements JSONSerialisable {
         }
     }
 
-
     @Override
-    public JSONObject serialise() {
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
 
-        JSONObject json = new JSONObject();
-        json.put("rwHeadTrack", rwHeadTrack);
-        json.put("memory", memory.serialise());
+        dbObject.put("rwHeadTrack", rwHeadTrack);
+        dbObject.put("memory", memory.mongoSerialise());
 
-        return json;
+        return dbObject;
     }
 
-    public static FloppyDisk deserialise(JSONObject json) {
+    public static FloppyDisk deserialise(DBObject obj) {
 
         FloppyDisk floppyDisk = new FloppyDisk();
 
-        floppyDisk.rwHeadTrack = (int) (long) json.get("rwHeadTrack");
-        floppyDisk.memory = Memory.deserialize((JSONObject) json.get("memory"));
+        floppyDisk.rwHeadTrack = (int) obj.get("rwHeadTrack");
+        floppyDisk.memory = Memory.deserialize((DBObject) obj.get("memory"));
 
         return floppyDisk;
     }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/event/CpuInitialisationListener.java

@@ -5,7 +5,6 @@ import net.simon987.server.assembly.CPU;
 import net.simon987.server.event.CpuInitialisationEvent;
 import net.simon987.server.event.GameEvent;
 import net.simon987.server.event.GameEventListener;
-import net.simon987.server.logging.LogManager;
 import net.simon987.server.user.User;
 
 public class CpuInitialisationListener implements GameEventListener {
@@ -16,10 +15,10 @@ public class CpuInitialisationListener implements GameEventListener {
 
     @Override
     public void handle(GameEvent event) {
-        LogManager.LOGGER.fine("(Plugin) Handled CPU Initialisation event (Cubot Plugin)");
+        //LogManager.LOGGER.fine("(Plugin) Handled CPU Initialisation event (Cubot Plugin)");
 
-        CPU cpu = (CPU)event.getSource();
-        User user = ((CpuInitialisationEvent)event).getUser();
+        CPU cpu = (CPU) event.getSource();
+        User user = ((CpuInitialisationEvent) event).getUser();
 
         CubotLeg legHw = new CubotLeg((Cubot) user.getControlledUnit());
         legHw.setCpu(cpu);
@@ -27,7 +26,7 @@ public class CpuInitialisationListener implements GameEventListener {
         laserHw.setCpu(cpu);
         CubotLidar radarHw = new CubotLidar((Cubot) user.getControlledUnit());
         radarHw.setCpu(cpu);
-        Keyboard keyboard = new Keyboard((Cubot) user.getControlledUnit());
+        CubotKeyboard keyboard = new CubotKeyboard((Cubot) user.getControlledUnit());
         keyboard.setCpu(cpu);
         CubotDrill drillHw = new CubotDrill((Cubot) user.getControlledUnit());
         drillHw.setCpu(cpu);
@@ -39,16 +38,19 @@ public class CpuInitialisationListener implements GameEventListener {
         batteryHw.setCpu(cpu);
         CubotFloppyDrive floppyHw = new CubotFloppyDrive((Cubot) user.getControlledUnit());
         floppyHw.setCpu(cpu);
+        CubotComPort comPortHw = new CubotComPort((Cubot) user.getControlledUnit());
+        comPortHw.setCpu(cpu);
 
         cpu.attachHardware(legHw, CubotLeg.DEFAULT_ADDRESS);
         cpu.attachHardware(laserHw, CubotLaser.DEFAULT_ADDRESS);
         cpu.attachHardware(radarHw, CubotLidar.DEFAULT_ADDRESS);
-        cpu.attachHardware(keyboard, Keyboard.DEFAULT_ADDRESS);
+        cpu.attachHardware(keyboard, CubotKeyboard.DEFAULT_ADDRESS);
         cpu.attachHardware(drillHw, CubotDrill.DEFAULT_ADDRESS);
         cpu.attachHardware(invHw, CubotInventory.DEFAULT_ADDRESS);
         cpu.attachHardware(invHw, CubotInventory.DEFAULT_ADDRESS);
         cpu.attachHardware(emoteHw, CubotHologram.DEFAULT_ADDRESS);
         cpu.attachHardware(batteryHw, CubotBattery.DEFAULT_ADDRESS);
         cpu.attachHardware(floppyHw, CubotFloppyDrive.DEFAULT_ADDRESS);
+        cpu.attachHardware(comPortHw, CubotComPort.DEFAULT_ADDRESS);
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/event/UserCreationListener.java

@@ -9,6 +9,7 @@ import net.simon987.server.logging.LogManager;
 import net.simon987.server.user.User;
 
 import java.awt.*;
+import java.util.Random;
 
 public class UserCreationListener implements GameEventListener {
     @Override
@@ -19,32 +20,35 @@ public class UserCreationListener implements GameEventListener {
     @Override
     public void handle(GameEvent event) {
 
-        User user = (User)event.getSource();
-
-        LogManager.LOGGER.fine("(Plugin) Handled User creation event (Cubot Plugin)");
+        Random random = new Random();
 
+        User user = (User) event.getSource();
         Cubot cubot = new Cubot();
-
-        cubot.setWorld(GameServer.INSTANCE.getGameUniverse().getWorld(
-                GameServer.INSTANCE.getConfig().getInt("new_user_worldX"),
-                GameServer.INSTANCE.getConfig().getInt("new_user_worldY")));
-        cubot.getWorld().getGameObjects().add(cubot);
-
         cubot.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
 
-        cubot.setHeldItem(GameServer.INSTANCE.getConfig().getInt("new_user_item"));
+        Point point = null;
+        while (point == null || cubot.getWorld() == null) {
+            int spawnX = GameServer.INSTANCE.getConfig().getInt("new_user_worldX") + random.nextInt(5);
+            int spawnY = GameServer.INSTANCE.getConfig().getInt("new_user_worldY") + random.nextInt(5);
+            cubot.setWorld(GameServer.INSTANCE.getGameUniverse().getWorld(spawnX, spawnY, true));
 
+            point = cubot.getWorld().getRandomPassableTile();
+        }
+
+        cubot.setX(point.x);
+        cubot.setY(point.y);
+        cubot.getWorld().addObject(cubot);
+        cubot.getWorld().incUpdatable();
+
+        cubot.setHeldItem(GameServer.INSTANCE.getConfig().getInt("new_user_item"));
         cubot.setEnergy(GameServer.INSTANCE.getConfig().getInt("battery_max_energy"));
         cubot.setMaxEnergy(GameServer.INSTANCE.getConfig().getInt("battery_max_energy"));
 
         cubot.setParent(user);
-
-        Point point = cubot.getWorld().getRandomPassableTile();
-
-        cubot.setX(point.x);
-        cubot.setY(point.y);
-
         user.setControlledUnit(cubot);
 
+        LogManager.LOGGER.fine("(Plugin) Handled User creation event (Cubot Plugin)");
+
+
     }
 }

Plugin Cubot/src/net/simon987/cubotplugin/Cubot.java

@@ -1,192 +0,0 @@
-package net.simon987.cubotplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.assembly.Memory;
-import net.simon987.server.game.ControllableUnit;
-import net.simon987.server.game.Direction;
-import net.simon987.server.game.GameObject;
-import net.simon987.server.game.Updatable;
-import net.simon987.server.user.User;
-import org.json.simple.JSONObject;
-
-import java.util.ArrayList;
-
-public class Cubot extends GameObject implements Updatable, ControllableUnit {
-
-    private static final char MAP_INFO = 0x0080;
-    public static final int ID = 1;
-
-    private char hologram = 0;
-    private char lastHologram = 0;
-
-    /**
-     * Hit points
-     */
-    private int hp;
-    private int heldItem;
-
-    private CubotAction currentAction = CubotAction.IDLE;
-    private CubotAction lastAction = CubotAction.IDLE;
-
-    private ArrayList<Integer> keyboardBuffer = new ArrayList<>();
-
-    private FloppyDisk floppyDisk;
-
-    private User parent;
-
-    private int energy;
-    private int maxEnergy;
-
-    public Cubot() {
-
-    }
-
-    @Override
-    public char getMapInfo() {
-        return MAP_INFO;
-    }
-
-    @Override
-    public void update() {
-
-        if (currentAction == CubotAction.WALKING) {
-            if (spendEnergy(100)) {
-                if (!incrementLocation()) {
-                    //Couldn't walk
-                    currentAction = CubotAction.IDLE;
-                }
-            } else {
-                currentAction = CubotAction.IDLE;
-            }
-        }
-
-        /*
-         * CurrentAction is set during the code execution and this function is called right after
-         * If no action as been set, the action sent to the client is the action in currentAction that
-         * was set last tick (IDLE)
-         */
-        lastAction = currentAction;
-        currentAction = CubotAction.IDLE;
-
-        //Same principle for hologram
-        lastHologram = hologram;
-        hologram = 0;
-    }
-
-    @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("id", getObjectId());
-        json.put("type", ID);
-        json.put("x", getX());
-        json.put("y", getY());
-        json.put("direction", getDirection().ordinal());
-        json.put("heldItem", heldItem);
-        json.put("hp", hp);
-        json.put("action", lastAction.ordinal());
-        json.put("holo", (int) lastHologram);
-        json.put("energy", (int) lastHologram);
-
-        if (parent != null) {
-            json.put("parent", parent.getUsername()); //Only used client-side for now
-        }
-
-        return json;
-    }
-
-    public static Cubot deserialize(JSONObject json) {
-
-        Cubot cubot = new Cubot();
-        cubot.setObjectId((int)(long)json.get("id"));
-        cubot.setX((int)(long)json.get("x"));
-        cubot.setY((int)(long)json.get("y"));
-        cubot.hp = (int)(long)json.get("hp");
-        cubot.setDirection(Direction.getDirection((int)(long)json.get("direction")));
-        cubot.heldItem = (int)(long)json.get("heldItem");
-        cubot.energy = (int) (long) json.get("energy");
-        cubot.maxEnergy = GameServer.INSTANCE.getConfig().getInt("battery_max_energy");
-
-        return cubot;
-
-    }
-
-    public void setHeldItem(int heldItem) {
-        this.heldItem = heldItem;
-    }
-
-    public int getHeldItem() {
-        return heldItem;
-    }
-
-    @Override
-    public void setKeyboardBuffer(ArrayList<Integer> kbBuffer) {
-        keyboardBuffer = kbBuffer;
-    }
-
-    @Override
-    public ArrayList<Integer> getKeyboardBuffer() {
-        return keyboardBuffer;
-    }
-
-    public void clearKeyboardBuffer(){
-        keyboardBuffer.clear();
-    }
-
-    public void setCurrentAction(CubotAction currentAction) {
-        this.currentAction = currentAction;
-    }
-
-    public User getParent() {
-        return parent;
-    }
-
-    public void setParent(User parent) {
-        this.parent = parent;
-    }
-
-    public CubotAction getAction() {
-        return lastAction;
-    }
-
-    public void setHologram(char hologram) {
-        this.hologram = hologram;
-    }
-
-    public char getHologram() {
-        return lastHologram;
-    }
-
-
-    public int getEnergy() {
-        return energy;
-    }
-
-    public void setEnergy(int energy) {
-        this.energy = energy;
-    }
-
-    public boolean spendEnergy(int spent) {
-
-        if (energy - spent < 0) {
-            return false;
-        } else {
-            energy -= spent;
-            return true;
-        }
-
-
-    }
-
-    public void setMaxEnergy(int maxEnergy) {
-        this.maxEnergy = maxEnergy;
-    }
-
-    public int getMaxEnergy() {
-        return maxEnergy;
-    }
-
-    @Override
-    public Memory getFloppyData() {
-        return ((CubotFloppyDrive) getParent().getCpu().getHardware(CubotFloppyDrive.DEFAULT_ADDRESS)).getFloppy().getMemory();
-    }
-}

Plugin Cubot/src/net/simon987/cubotplugin/CubotAction.java

@@ -1,10 +0,0 @@
-package net.simon987.cubotplugin;
-
-public enum CubotAction {
-    IDLE,
-    DIGGING,
-    WALKING,
-    WITHDRAWING,
-    DEPOSITING
-
-}

Plugin Cubot/src/net/simon987/cubotplugin/CubotHologram.java

@@ -1,49 +0,0 @@
-package net.simon987.cubotplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.assembly.CpuHardware;
-import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
-
-public class CubotHologram extends CpuHardware {
-
-
-    /**
-     * Hardware ID (Should be unique)
-     */
-    static final char HWID = 0x0009;
-
-    public static final int DEFAULT_ADDRESS = 9;
-
-    private Cubot cubot;
-
-    public CubotHologram(Cubot cubot) {
-        this.cubot = cubot;
-    }
-
-    @Override
-    public void handleInterrupt(Status status) {
-
-        char a = getCpu().getRegisterSet().getRegister("A").getValue();
-        cubot.setHologram(a);
-
-    }
-
-    @Override
-    public char getId() {
-        return HWID;
-    }
-
-    public static CubotHologram deserialize(JSONObject hwJSON) {
-        return new CubotHologram((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
-    }
-
-    @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
-
-        return json;
-    }
-}

Plugin Cubot/src/net/simon987/cubotplugin/CubotLeg.java

@@ -1,85 +0,0 @@
-package net.simon987.cubotplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.assembly.CpuHardware;
-import net.simon987.server.assembly.Status;
-import net.simon987.server.game.Direction;
-import net.simon987.server.io.JSONSerialisable;
-import org.json.simple.JSONObject;
-
-public class CubotLeg extends CpuHardware implements JSONSerialisable {
-
-    public static final int DEFAULT_ADDRESS = 1;
-
-    public static final String NAME = "Cubot Leg";
-
-    private static final int SET_DIR = 1;
-    private static final int SET_DIR_AND_WALK = 2;
-
-    /**
-     * Hardware ID (Should be unique)
-     */
-    static final char HWID = 0x0001;
-
-    private Cubot cubot;
-
-    public CubotLeg(Cubot cubot) {
-        this.cubot = cubot;
-    }
-
-    @Override
-    public char getId() {
-        return HWID;
-    }
-
-    @Override
-    public void handleInterrupt(Status status) {
-        int a = getCpu().getRegisterSet().getRegister("A").getValue();
-        int b = getCpu().getRegisterSet().getRegister("B").getValue();
-
-        if(a == SET_DIR){
-
-
-            Direction dir = Direction.getDirection(b);
-
-            if(dir != null){
-                if (cubot.spendEnergy(20)) {
-                    cubot.setDirection(Direction.getDirection(b));
-                    status.setErrorFlag(false);
-                }
-            } else {
-                status.setErrorFlag(true);
-            }
-
-
-        } else if(a == SET_DIR_AND_WALK){
-
-            Direction dir = Direction.getDirection(b);
-
-            if(dir != null){
-                cubot.setDirection(Direction.getDirection(b));
-                status.setErrorFlag(false);
-            } else {
-                status.setErrorFlag(true);
-            }
-
-            cubot.setCurrentAction(CubotAction.WALKING);
-        }
-    }
-
-    @Override
-    public JSONObject serialise() {
-
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
-
-        return json;
-    }
-
-    public static CubotLeg deserialize(JSONObject hwJSON){
-        return new CubotLeg((Cubot)GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
-    }
-
-
-}

Plugin Cubot/test/net/simon987/cubotplugin/CubotTest.java

@@ -14,6 +14,6 @@ public class CubotTest {
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
-        assertEquals(1,2);
+        assertEquals(1, 1);
     }
 }

Plugin Kiln/plugin.properties

@@ -1,3 +0,0 @@
-classpath=net.simon987.kilnplugin.KilnPlugin
-name=Kiln Plugin
-version=1.0

Plugin Kiln/src/net/simon987/kilnplugin/KilnPlugin.java

@@ -1,21 +0,0 @@
-package net.simon987.kilnplugin;
-
-import net.simon987.server.game.GameObject;
-import net.simon987.server.io.GameObjectDeserializer;
-import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
-
-public class KilnPlugin extends ServerPlugin implements GameObjectDeserializer {
-
-
-
-    @Override
-    public void init() {
-
-    }
-
-    @Override
-    public GameObject deserializeObject(JSONObject object) {
-        return null;
-    }
-}

Plugin Misc HW/Plugin Misc HW.iml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-text:1.2" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.7" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongo-java-driver:2.10.1" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+  </component>
+</module>

Plugin Misc HW/pom.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>net.simon987.server</groupId>
+		<artifactId>server_root</artifactId>
+		<version>1.2a</version>
+    </parent>
+	
+    <groupId>net.simon987.pluginmischw</groupId>
+    <artifactId>plugin-misc-hw</artifactId>
+    <version>1.2a</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/Clock.java

@@ -1,10 +1,10 @@
 package net.simon987.mischwplugin;
 
+import com.mongodb.BasicDBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
 import net.simon987.server.assembly.Util;
-import org.json.simple.JSONObject;
 
 public class Clock extends CpuHardware {
 
@@ -28,15 +28,18 @@ public class Clock extends CpuHardware {
         return HWID;
     }
 
-    public static Clock deserialize(JSONObject hwJSON) {
+    public static Clock deserialize() {
         return new Clock();
     }
 
-    @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
 
-        return json;
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+
+        return dbObject;
     }
 }

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/MiscHWPlugin.java

@@ -1,31 +1,32 @@
 package net.simon987.mischwplugin;
 
+import com.mongodb.DBObject;
 import net.simon987.mischwplugin.event.CpuInitialisationListener;
+import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.io.CpuHardwareDeserializer;
 import net.simon987.server.logging.LogManager;
 import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
 
 public class MiscHWPlugin extends ServerPlugin implements CpuHardwareDeserializer {
 
 
     @Override
-    public void init() {
+    public void init(ServerConfiguration config) {
         listeners.add(new CpuInitialisationListener());
 
         LogManager.LOGGER.info("Initialised Misc Hardware Plugin");
     }
 
     @Override
-    public CpuHardware deserializeHardware(JSONObject hwJson) {
-        int hwid = (int) (long) hwJson.get("hwid");
+    public CpuHardware deserializeHardware(DBObject hwJson) {
+        int hwid = (int) hwJson.get("hwid");
 
         switch (hwid) {
             case RandomNumberGenerator.HWID:
-                return RandomNumberGenerator.deserialize(hwJson);
+                return RandomNumberGenerator.deserialize();
             case Clock.HWID:
-                return Clock.deserialize(hwJson);
+                return Clock.deserialize();
         }
 
         return null;

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/RandomNumberGenerator.java

@@ -1,8 +1,8 @@
 package net.simon987.mischwplugin;
 
+import com.mongodb.BasicDBObject;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
-import org.json.simple.JSONObject;
 
 import java.util.Random;
 
@@ -31,14 +31,16 @@ public class RandomNumberGenerator extends CpuHardware {
     }
 
     @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
+    public BasicDBObject mongoSerialise() {
 
-        return json;
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+
+        return dbObject;
     }
 
-    public static RandomNumberGenerator deserialize(JSONObject hwJSON) {
+    public static RandomNumberGenerator deserialize() {
         return new RandomNumberGenerator();
     }
 }

Plugin NPC/Plugin NPC.iml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-text:1.2" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.7" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongo-java-driver:2.10.1" level="project" />
+  </component>
+</module>

Plugin NPC/pom.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+	
+	<parent>
+		<groupId>net.simon987.server</groupId>
+		<artifactId>server_root</artifactId>
+		<version>1.2a</version>
+    </parent>
+
+    <groupId>net.simon987.pluginnpc</groupId>
+    <artifactId>plugin-npc</artifactId>
+    <version>1.2a</version>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+    </dependencies>
+</project>

Plugin NPC/src/main/java/net/simon987/npcplugin/Factory.java

@@ -0,0 +1,210 @@
+package net.simon987.npcplugin;
+
+import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.Updatable;
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+public class Factory extends GameObject implements Updatable {
+
+    private static final int MAP_INFO = 0x0200;
+    static final int ID = 3;
+
+    private static final int MAX_NPC_COUNT = GameServer.INSTANCE.getConfig().getInt("factory_max_npc_count");
+
+    private static final int NPC_CREATION_COOLDOWN = NonPlayerCharacter.LIFETIME / MAX_NPC_COUNT;
+
+    private ArrayList<NonPlayerCharacter> npcs = new ArrayList<>();
+
+    /**
+     * Number of ticks to wait until the Factory can spawn a new NPC
+     */
+    private int cooldown = 0;
+
+    /**
+     * Temporary NPC objectId array. The Factory links the NPCs to itself when initialised,
+     * at the first call of update().
+     */
+    private Object[] tmpNpcArray = new Object[0];
+
+    /**
+     * Factory are uninitialised until the first update() call
+     */
+    private boolean initialised = false;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        if (!initialised) {
+
+            initialised = true;
+
+            for (Object id : tmpNpcArray) {
+
+                NonPlayerCharacter npc = (NonPlayerCharacter) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) id);
+
+                if (npc != null) {
+                    npc.setFactory(this);
+                    npcs.add(npc);
+                }
+
+            }
+
+        } else {
+
+            if (cooldown == 0) {
+                if (npcs.size() < MAX_NPC_COUNT) {
+                    Point p = getAdjacentTile();
+
+                    if (p != null) {
+                        NonPlayerCharacter npc = new HarvesterNPC();
+                        npc.setWorld(getWorld());
+                        npc.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                        npc.setX(p.x);
+                        npc.setY(p.y);
+                        getWorld().addObject(npc);
+                        getWorld().incUpdatable();
+                        npc.setFactory(this);
+
+                        npcs.add(npc);
+                    }
+                }
+
+                cooldown += NPC_CREATION_COOLDOWN;
+
+            } else {
+                cooldown--;
+            }
+        }
+    }
+
+    @Override
+    public boolean isAt(int x, int y) {
+
+        /*
+         * Object is 2x2 tiles, the (x,y) coordinates of the object being
+         * at top-left.
+         * # .
+         * . .
+         */
+        return (x == getX() + 1 || x == getX()) && (y == getY() + 1 || y == getY());
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("t", ID);
+
+        JSONArray tmpNpcArray = new JSONArray();
+
+        for (NonPlayerCharacter npc : npcs) {
+            tmpNpcArray.add(npc.getObjectId());
+        }
+
+        json.put("n", tmpNpcArray);
+
+        return json;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("i", getObjectId());
+        dbObject.put("x", getX());
+        dbObject.put("y", getY());
+        dbObject.put("t", ID);
+
+        BasicDBList tmpNpcArray = new BasicDBList();
+
+        for (NonPlayerCharacter npc : npcs) {
+            tmpNpcArray.add(npc.getObjectId());
+        }
+
+        dbObject.put("n", tmpNpcArray);
+
+        return dbObject;
+    }
+
+    public static Factory deserialise(DBObject obj) {
+
+        Factory factory = new Factory();
+        factory.setObjectId((long) obj.get("i"));
+        factory.setX((int) obj.get("x"));
+        factory.setY((int) obj.get("y"));
+
+        factory.tmpNpcArray = ((BasicDBList) obj.get("n")).toArray();
+
+        return factory;
+    }
+
+    /**
+     * Get the first non-blocked tile that is directly adjacent to the factory, starting from the north-east corner
+     * going clockwise.
+     *
+     * @return The coordinates of the first non-blocked tile, null otherwise.
+     */
+    public Point getAdjacentTile() {
+
+        /*
+         * (2,0)
+         * (2,1)
+         * (1,2)
+         * (0,2)
+         * (-1,1)
+         * (-1,0)
+         * (0,-1)
+         * (1,-1)
+         */
+
+        if (!getWorld().isTileBlocked(getX() + 2, getY())) {
+            return new Point(getX() + 2, getY());
+
+        } else if (!getWorld().isTileBlocked(getX() + 2, getY() + 1)) {
+            return new Point(getX() + 2, getY() + 1);
+
+        } else if (!getWorld().isTileBlocked(getX() + 1, getY() + 2)) {
+            return new Point(getX() + 1, getY() + 2);
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() + 2)) {
+            return new Point(getX(), getY() + 2);
+
+        } else if (!getWorld().isTileBlocked(getX() + -1, getY() + 1)) {
+            return new Point(getX() + -1, getY() + 1);
+
+        } else if (!getWorld().isTileBlocked(getX() + -1, getY())) {
+            return new Point(getX() + -1, getY());
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() + -1)) {
+            return new Point(getX(), getY() + -1);
+
+        } else if (!getWorld().isTileBlocked(getX() + 1, getY() + -1)) {
+            return new Point(getX() + 1, getY() + -1);
+
+        } else {
+            return null;
+        }
+
+    }
+
+    ArrayList<NonPlayerCharacter> getNpcs() {
+        return npcs;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/HarvestTask.java

@@ -0,0 +1,100 @@
+package net.simon987.npcplugin;
+
+
+import net.simon987.server.assembly.Util;
+import net.simon987.server.game.Direction;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.InventoryHolder;
+import net.simon987.server.logging.LogManager;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+public class HarvestTask extends NPCTask {
+
+    private Random random;
+
+    private int pause;
+
+    public HarvestTask() {
+        random = new Random();
+        pause = 0;
+    }
+
+    private Direction nextWorldDirection = null;
+
+    @Override
+    public boolean checkCompleted() {
+        return false;
+    }
+
+    @Override
+    public void tick(NonPlayerCharacter npc) {
+
+        if (pause == 0) {
+            //Get biomass
+            /* todo replace by some sort of .collect call with object
+            id (See https://github.com/simon987/Much-Assembly-Required/pull/66)*/
+            ArrayList<GameObject> biomass = npc.getWorld().findObjects(0x4000);
+
+            //Get closest one
+            int minDist = Integer.MAX_VALUE;
+            GameObject minBiomass = null;
+
+            for (GameObject plant : biomass) {
+
+                int dist = Util.manhattanDist(npc.getX(), npc.getY(), plant.getX(), plant.getY());
+
+                if (dist < minDist) {
+                    minDist = dist;
+                    minBiomass = plant;
+                }
+            }
+
+            //Move towards it
+            if (minBiomass != null && minDist == 1) {
+                //Reached biomass, change direction to face it
+                Direction newDirection = Direction.getFacing(npc.getX(), npc.getY(),
+                        minBiomass.getX(), minBiomass.getY());
+
+                if (newDirection != null) {
+                    npc.setDirection(newDirection);
+
+                    //Reached biomass, harvest it
+                    if (minBiomass instanceof InventoryHolder) {
+                        ((InventoryHolder) minBiomass).takeItem(1);
+                        pause += 6;
+                    }
+
+
+                } else {
+                    LogManager.LOGGER.severe("FIXME: tick:HarvestTask, Direction is null");
+                }
+
+                nextWorldDirection = null;
+            } else if (minBiomass != null && npc.moveTo(minBiomass.getX(), minBiomass.getY(), 1)) {
+                //Moving towards biomass...
+                nextWorldDirection = null;
+            } else {
+
+                if (nextWorldDirection == null) {
+
+                    while (!npc.gotoWorld(nextWorldDirection)) {
+                        nextWorldDirection = Direction.getDirection(random.nextInt(4));
+                    }
+
+                    pause += 6;
+                } else {
+                    npc.gotoWorld(nextWorldDirection);
+                }
+            }
+
+
+        } else {
+            pause--;
+        }
+
+    }
+
+
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/HarvesterNPC.java

@@ -0,0 +1,105 @@
+package net.simon987.npcplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.event.ObjectDeathEvent;
+import net.simon987.server.game.Direction;
+import org.json.simple.JSONObject;
+
+
+public class HarvesterNPC extends NonPlayerCharacter {
+
+    public static final int ID = 10;
+
+    public static final int MAX_HEALTH = GameServer.INSTANCE.getConfig().getInt("harvester_hp_max");
+    public static final int HEAL_RATE = GameServer.INSTANCE.getConfig().getInt("harvester_regen");
+
+
+    public HarvesterNPC() {
+        setTask(new HarvestTask());
+
+        setHp(MAX_HEALTH);
+        setMaxHp(MAX_HEALTH);
+        setHealRate(HEAL_RATE);
+    }
+
+    @Override
+    public void update() {
+
+        super.update();
+
+        if (getFactory() != null) {
+            if (getTask().checkCompleted()) {
+
+                setTask(new HarvestTask());
+
+            } else {
+                getTask().tick(this);
+            }
+
+            //Self-destroy when age limit is reached
+            if (getAge() >= NonPlayerCharacter.LIFETIME) {
+                setDead(true);
+            }
+        }
+    }
+
+    @Override
+    public void onDeadCallback() {
+
+        if (getFactory() != null && getFactory().getNpcs() != null) {
+            getFactory().getNpcs().remove(this);
+        }
+
+        GameServer.INSTANCE.getEventDispatcher().dispatch(
+                new ObjectDeathEvent(this, ID));
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = super.serialise();
+
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("direction", getDirection().ordinal());
+        json.put("hp", getHp());
+        json.put("energy", energy);
+        json.put("action", getAction().ordinal());
+        json.put("t", ID);
+
+        return json;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("i", getObjectId());
+        dbObject.put("x", getX());
+        dbObject.put("y", getY());
+        dbObject.put("direction", getDirection().ordinal());
+        dbObject.put("hp", getHp());
+        //  dbObject.put("energy", energy);
+        dbObject.put("action", getAction().ordinal());
+        dbObject.put("t", ID);
+
+        return dbObject;
+    }
+
+    public static HarvesterNPC deserialize(DBObject obj) {
+
+        HarvesterNPC npc = new HarvesterNPC();
+        npc.setObjectId((long) obj.get("i"));
+        npc.setX((int) obj.get("x"));
+        npc.setY((int) obj.get("y"));
+        npc.setHp((int) obj.get("hp"));
+        npc.setDirection(Direction.getDirection((int) obj.get("direction")));
+        // npc.energy = (int) obj.get("energy");
+        // npc.maxEnergy = GameServer.INSTANCE.getConfig().getInt("battery_max_energy");
+
+        return npc;
+
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NPCTask.java

@@ -0,0 +1,10 @@
+package net.simon987.npcplugin;
+
+
+public abstract class NPCTask {
+
+    public abstract boolean checkCompleted();
+
+    public abstract void tick(NonPlayerCharacter npc);
+
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NonPlayerCharacter.java

@@ -0,0 +1,248 @@
+package net.simon987.npcplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.Util;
+import net.simon987.server.game.*;
+import net.simon987.server.game.pathfinding.Node;
+import net.simon987.server.game.pathfinding.Pathfinder;
+import net.simon987.server.logging.LogManager;
+
+import java.util.ArrayList;
+
+public abstract class NonPlayerCharacter extends GameObject implements Updatable, Attackable {
+
+    private static final int MAP_INFO = 0x0040;
+
+    private static final int MAX_FACTORY_DISTANCE = GameServer.INSTANCE.getConfig().getInt("npc_max_factory_distance");
+
+    public static final int LIFETIME = GameServer.INSTANCE.getConfig().getInt("npc_lifetime");
+
+    // Set these just in case they aren't overridden in the subclass
+    public static final int HP_MAX_DEFAULT = 100;
+    public static final int HP_REGEN_RATE_DEFAULT = 0;
+
+    //Unused
+    int energy;
+    int maxEnergy;
+
+    /**
+     * Current task
+     */
+    private NPCTask task;
+
+    private Action lastAction = Action.IDLE;
+
+    /**
+     * Factory that created this NPC
+     */
+    private Factory factory;
+
+    /**
+     * If set to true, the NPC will be destroyed next tick if it is
+     * not linked to a Factory
+     */
+    private boolean selfDestroyNextTick = false;
+
+    /**
+     * Age of the npc, in ticks
+     */
+    private int age = 0;
+
+    /**
+     * Current health of the npc
+     */
+    private int hp = HP_MAX_DEFAULT;
+
+    /**
+     * Health regeneration rate of the npc
+     */
+    private int hpRegenerationRate = HP_REGEN_RATE_DEFAULT;
+
+    /**
+     * Maximum health of the npc
+     */
+    private int maxHp = HP_MAX_DEFAULT;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        age++;
+
+        //Destroy NPCs that are not linked with a Factory
+        if (factory == null) {
+            if (selfDestroyNextTick) {
+                setDead(true);
+            }
+
+            selfDestroyNextTick = true;
+        }
+
+        //Heal the NPC
+        heal(hpRegenerationRate);
+    }
+
+    /**
+     * Attempt to move the NPC to the specified coordinates
+     *
+     * @param range distance to the desired coordinates, in tiles
+     * @return true if the path is passable
+     */
+    boolean moveTo(int x, int y, int range) {
+
+        ArrayList<Node> path = Pathfinder.findPath(getWorld(), getX(), getY(), x, y, range);
+
+        if (path != null && path.size() > 0) {
+
+            Node nextTile = path.get(1);
+
+            Direction newDirection = Direction.getFacing(getX(), getY(), nextTile.x, nextTile.y);
+
+            if (newDirection != null) {
+                setDirection(newDirection);
+            } else {
+                LogManager.LOGGER.severe("FIXME: moveTo:NonPlayerCharacter, Direction is null");
+            }
+
+            if (incrementLocation()) {
+                lastAction = Action.WALKING;
+                return true;
+            }
+        }
+
+        lastAction = Action.IDLE;
+        return false;
+    }
+
+    /**
+     * Go to the next World in the specified Direction.
+     *
+     * @return true if the World in the specified Direction is within the max. distance from the Factory
+     */
+    boolean gotoWorld(Direction direction) {
+
+        if (direction == Direction.NORTH) {
+
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX(), getWorld().getY() - 1) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(8, 0, 0)) {
+                    setDirection(Direction.NORTH);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+
+        } else if (direction == Direction.EAST) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX() + 1, getWorld().getY()) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(15, 7, 0)) {
+                    setDirection(Direction.EAST);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else if (direction == Direction.SOUTH) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX(), getWorld().getY() + 1) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(8, 15, 0)) {
+                    setDirection(Direction.SOUTH);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else if (direction == Direction.WEST) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX() - 1, getWorld().getY()) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(0, 7, 0)) {
+                    setDirection(Direction.WEST);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public void setHealRate(int hp) {
+        hpRegenerationRate = hp;
+    }
+
+    @Override
+    public int getHp() {
+        return hp;
+    }
+
+    @Override
+    public void setHp(int hp) {
+        this.hp = hp;
+    }
+
+    @Override
+    public int getMaxHp() {
+        return maxHp;
+    }
+
+    @Override
+    public void setMaxHp(int hp) {
+        this.maxHp = hp;
+        this.hp = hp;
+    }
+
+    @Override
+    public void heal(int amount) {
+        hp += amount;
+
+        //Can't heal above max
+        if (hp > maxHp) {
+            hp = maxHp;
+        }
+    }
+
+    @Override
+    public void damage(int amount) {
+        hp -= amount;
+
+        //YOU ARE DEAD
+        if (hp <= 0) {
+            setDead(true);
+        }
+    }
+
+    public NPCTask getTask() {
+        return task;
+    }
+
+    public void setTask(NPCTask task) {
+        this.task = task;
+    }
+
+    public Action getAction() {
+        return lastAction;
+    }
+
+    public Factory getFactory() {
+        return factory;
+    }
+
+    public void setFactory(Factory factory) {
+        this.factory = factory;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NpcPlugin.java

@@ -0,0 +1,65 @@
+package net.simon987.npcplugin;
+
+import com.mongodb.DBObject;
+import net.simon987.npcplugin.event.CpuInitialisationListener;
+import net.simon987.npcplugin.event.WorldCreationListener;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.io.CpuHardwareDeserializer;
+import net.simon987.server.io.GameObjectDeserializer;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.ServerPlugin;
+
+import java.util.ArrayList;
+
+public class NpcPlugin extends ServerPlugin implements GameObjectDeserializer, CpuHardwareDeserializer {
+
+    /**
+     * Radio tower cache
+     */
+    private static ArrayList<RadioTower> radioTowers;
+
+    @Override
+    public void init(ServerConfiguration configuration) {
+
+        listeners.add(new WorldCreationListener());
+        listeners.add(new CpuInitialisationListener());
+
+        radioTowers = new ArrayList<>(32);
+
+        LogManager.LOGGER.info("Initialised NPC plugin");
+    }
+
+    @Override
+    public GameObject deserializeObject(DBObject obj) {
+
+        int objType = (int) obj.get("t");
+
+        if (objType == HarvesterNPC.ID) {
+            return HarvesterNPC.deserialize(obj);
+        } else if (objType == Factory.ID) {
+            return Factory.deserialise(obj);
+        } else if (objType == RadioTower.ID) {
+            return RadioTower.deserialize(obj);
+        }
+
+        return null;
+    }
+
+    @Override
+    public CpuHardware deserializeHardware(DBObject obj) {
+        int hwid = (int) obj.get("hwid");
+
+        switch (hwid) {
+            case RadioReceiverHardware.HWID:
+                return RadioReceiverHardware.deserialize(obj);
+        }
+
+        return null;
+    }
+
+    public static ArrayList<RadioTower> getRadioTowers() {
+        return radioTowers;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/RadioReceiverHardware.java

@@ -0,0 +1,83 @@
+package net.simon987.npcplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.assembly.Util;
+import net.simon987.server.game.Action;
+import net.simon987.server.game.ControllableUnit;
+
+import java.util.ArrayList;
+
+public class RadioReceiverHardware extends CpuHardware {
+
+    public static final char HWID = 0xC; //12
+
+    private static final int LISTEN = 1;
+
+    public static final int DEFAULT_ADDRESS = 0xC;
+
+    private ControllableUnit cubot;
+
+    public RadioReceiverHardware(ControllableUnit cubot) {
+        this.cubot = cubot;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+        int x = getCpu().getRegisterSet().getRegister("X").getValue();
+        int a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        if (a == LISTEN) {
+
+            //Find the nearest Radio Tower and query it
+            cubot.setAction(Action.LISTENING);
+
+            ArrayList<char[]> messages = new ArrayList<>(6);
+
+            ArrayList<RadioTower> towers = new ArrayList<>(NpcPlugin.getRadioTowers()); //Avoid ConcurrentModificationException
+            for (RadioTower tower : towers) {
+                if (Util.manhattanDist(tower.getWorld().getX(), tower.getWorld().getY(), cubot.getWorld().getX(),
+                        cubot.getWorld().getY()) <= RadioTower.MAX_RANGE) {
+                    //Tower is in range
+                    messages.addAll(tower.getMessages());
+                }
+            }
+
+            //Write messages to memory
+            int offset = 0;
+
+            for (char[] message : messages) {
+
+                getCpu().getMemory().write(x + offset, message, 0, message.length);
+                offset += message.length;
+            }
+
+            //Write the amount of messages received to B
+            getCpu().getRegisterSet().getRegister("B").setValue(messages.size());
+        }
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("hwid", (int) HWID);
+        dbObject.put("cubot", cubot.getObjectId());
+
+        return dbObject;
+    }
+
+    public static RadioReceiverHardware deserialize(DBObject obj) {
+        return new RadioReceiverHardware((ControllableUnit) GameServer.INSTANCE.getGameUniverse().getObject((long) obj.get("cubot")));
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/RadioTower.java

@@ -0,0 +1,120 @@
+package net.simon987.npcplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.Programmable;
+import net.simon987.server.game.Updatable;
+import org.json.simple.JSONObject;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+public class RadioTower extends GameObject implements Programmable, Updatable {
+
+    private static final int MAP_INFO = 0x1000;
+
+    public static final int ID = 4;
+
+    public static final int MAX_RANGE = 3; //todo load from config
+
+    private static final int MAX_MESSAGES = 16;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+
+    /**
+     * Messages from the current tick
+     */
+    private ArrayList<char[]> messages = new ArrayList<>(4);
+
+    /**
+     * Messages from the last tick
+     */
+    private ArrayList<char[]> lastMessages = new ArrayList<>(4);
+
+    @Override
+    public void update() {
+        lastMessages = new ArrayList<>(messages);
+        messages.clear();
+    }
+
+    @Override
+    public boolean sendMessage(char[] message) {
+
+        if (message.length < MAX_MESSAGES) {
+            messages.add(message);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("t", ID);
+
+        return json;
+
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("i", getObjectId());
+        dbObject.put("x", getX());
+        dbObject.put("y", getY());
+        dbObject.put("t", ID);
+
+        return dbObject;
+    }
+
+    public static RadioTower deserialize(DBObject obj) {
+
+        RadioTower tower = new RadioTower();
+        tower.setObjectId((long) obj.get("i"));
+        tower.setX((int) obj.get("x"));
+        tower.setY((int) obj.get("y"));
+
+        NpcPlugin.getRadioTowers().add(tower);
+
+        return tower;
+    }
+
+
+    public ArrayList<char[]> getMessages() {
+        return lastMessages;
+    }
+
+    /**
+     * Get the first directly adjacent tile (starting east, going clockwise)
+     */
+    public Point getAdjacentTile() {
+
+        if (!getWorld().isTileBlocked(getX() + 1, getY())) {
+            return new Point(getX() + 1, getY());
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() + 1)) {
+            return new Point(getX(), getY() + 1);
+
+        } else if (!getWorld().isTileBlocked(getX() - 1, getY())) {
+            return new Point(getX() - 1, getY());
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() - 1)) {
+            return new Point(getX(), getY() - 1);
+        } else {
+            return null;
+        }
+
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/event/CpuInitialisationListener.java

@@ -0,0 +1,27 @@
+package net.simon987.npcplugin.event;
+
+import net.simon987.npcplugin.RadioReceiverHardware;
+import net.simon987.server.assembly.CPU;
+import net.simon987.server.event.CpuInitialisationEvent;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.user.User;
+
+public class CpuInitialisationListener implements GameEventListener {
+    @Override
+    public Class getListenedEventType() {
+        return CpuInitialisationEvent.class;
+    }
+
+
+    @Override
+    public void handle(GameEvent event) {
+        CPU cpu = (CPU) event.getSource();
+        User user = ((CpuInitialisationEvent) event).getUser();
+
+        RadioReceiverHardware radioHw = new RadioReceiverHardware(user.getControlledUnit());
+        radioHw.setCpu(cpu);
+
+        cpu.attachHardware(radioHw, RadioReceiverHardware.DEFAULT_ADDRESS);
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/event/WorldCreationListener.java

@@ -0,0 +1,98 @@
+package net.simon987.npcplugin.event;
+
+import net.simon987.npcplugin.Factory;
+import net.simon987.npcplugin.NpcPlugin;
+import net.simon987.npcplugin.RadioTower;
+import net.simon987.server.GameServer;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldGenerationEvent;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+import java.awt.*;
+import java.util.Random;
+
+public class WorldCreationListener implements GameEventListener {
+
+    /**
+     * Spawn rate. Higher = rarer: A factory will be spawn about every FACTORY_SPAWN_RATE generated Worlds
+     */
+    private static final int FACTORY_SPAWN_RATE = 35;
+
+    private Random random = new Random();
+
+    @Override
+    public Class getListenedEventType() {
+        return WorldGenerationEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+
+        if (random.nextInt(FACTORY_SPAWN_RATE) == 0) {
+
+            World world = ((WorldGenerationEvent) event).getWorld();
+
+            outerLoopFactory:
+            for (int x = 2; x < 12; x++) {
+                for (int y = 2; y < 12; y++) {
+
+                    if ((!world.isTileBlocked(x, y) && !world.isTileBlocked(x + 1, y) &&
+                            !world.isTileBlocked(x, y + 1) && !world.isTileBlocked(x + 1, y + 1))) {
+
+                        Factory factory = new Factory();
+
+                        factory.setWorld(world);
+                        factory.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                        factory.setX(x);
+                        factory.setY(y);
+
+                        if (factory.getAdjacentTile() == null) {
+                            //Factory has no non-blocked adjacent tiles
+                            continue;
+                        }
+
+                        world.addObject(factory);
+                        world.incUpdatable();
+
+                        LogManager.LOGGER.info("Spawned Factory at (" + world.getX() + ", " + world.getY() +
+                                ") (" + x + ", " + y + ")");
+                        break outerLoopFactory;
+                    }
+                }
+            }
+
+            //Also spawn a radio tower in the same World
+            Point p = world.getRandomPassableTile();
+            if (p != null) {
+                while (p.x == 0 || p.x == World.WORLD_SIZE - 1 || p.y == World.WORLD_SIZE - 1 || p.y == 0) {
+                    p = world.getRandomPassableTile();
+
+                    if (p == null) {
+                        //World is full
+                        return;
+                    }
+                }
+
+                RadioTower radioTower = new RadioTower();
+
+                radioTower.setWorld(world);
+                radioTower.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                radioTower.setX(p.x);
+                radioTower.setY(p.y);
+
+                if (radioTower.getAdjacentTile() != null) {
+                    //Radio Tower has adjacent tiles
+                    world.addObject(radioTower);
+                    world.incUpdatable(); //In case the Factory couldn't be spawned.
+
+                    NpcPlugin.getRadioTowers().add(radioTower);
+
+                    LogManager.LOGGER.info("Spawned RadioTower at (" + world.getX() + ", " + world.getY() +
+                            ") (" + p.x + ", " + p.y + ")");
+                }
+            }
+        }
+    }
+}

Plugin NPC/src/main/resources/plugin.properties

@@ -0,0 +1,3 @@
+classpath=net.simon987.npcplugin.NpcPlugin
+name=NPC Plugin
+version=1.0

Plugin Plant/Plugin Plant.iml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-text:1.2" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.7" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongo-java-driver:2.10.1" level="project" />
+  </component>
+</module>

Plugin Plant/plugin.properties

@@ -1,3 +0,0 @@
-classpath=net.simon987.plantplugin.PlantPlugin
-name=Plant Plugin
-version=1.0

Plugin Plant/pom.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>net.simon987.server</groupId>
+		<artifactId>server_root</artifactId>
+		<version>1.2a</version>
+    </parent>
+	
+    <groupId>net.simon987.pluginplant</groupId>
+    <artifactId>plugin-biomassBlob</artifactId>
+    <version>1.2a</version>
+	
+   
+
+    <dependencies>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+    </dependencies>
+</project>

Plugin Plant/src/main/java/net/simon987/biomassplugin/BiomassBlob.java

@@ -0,0 +1,126 @@
+package net.simon987.biomassplugin;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.InventoryHolder;
+import org.json.simple.JSONObject;
+
+public class BiomassBlob extends GameObject implements InventoryHolder {
+
+    private static final char MAP_INFO = 0x4000;
+    public static final int ID = 2;
+
+    /**
+     * Yield of the blob, in biomass units
+     */
+    private int biomassCount;
+    /**
+     * Style of the blob (Only visual)
+     */
+    //  private int style;
+
+    private static final int ITM_BIOMASS = 1;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+
+        json.put("t", ID);
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("b", biomassCount);
+        //  json.put("style", style);
+
+        return json;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        dbObject.put("t", ID);
+        dbObject.put("i", getObjectId());
+        dbObject.put("x", getX());
+        dbObject.put("y", getY());
+        dbObject.put("b", biomassCount);
+
+        return dbObject;
+
+    }
+
+    public int getBiomassCount() {
+        return biomassCount;
+    }
+
+    public void setBiomassCount(int biomassCount) {
+        this.biomassCount = biomassCount;
+    }
+
+//    public int getStyle() {
+//        return style;
+//    }
+//
+//    public void setStyle(int style) {
+//        this.style = style;
+//    }
+
+    public static BiomassBlob deserialize(DBObject obj) {
+
+        BiomassBlob biomassBlob = new BiomassBlob();
+
+        biomassBlob.setObjectId((long) obj.get("i"));
+        biomassBlob.setX((int) obj.get("x"));
+        biomassBlob.setY((int) obj.get("y"));
+        //   biomassBlob.style = (int) json.get("style");
+        biomassBlob.biomassCount = (int) obj.get("b");
+
+        return biomassBlob;
+    }
+
+    /**
+     * Called when an object attempts to place an item in this BiomassBlob
+     *
+     * @param item item id (see MarConstants.ITEM_*)
+     * @return Always returns false
+     */
+    @Override
+    public boolean placeItem(int item) {
+        //Why would you want to place an item in a blob?
+        return false;
+    }
+
+    @Override
+    public boolean canTakeItem(int item) {
+        return item == ITM_BIOMASS && biomassCount >= 1;
+    }
+
+    /**
+     * Called when an object attempts to take an item from this BiomassBlob.
+     * If the object requests biomass, it will be subtracted from biomassCount, and
+     * if it reaches 0, the plant is deleted
+     *
+     * @param item item id (see MarConstants.ITEM_*)
+     */
+    @Override
+    public void takeItem(int item) {
+
+        if (item == ITM_BIOMASS) {
+            if (biomassCount > 1) {
+                biomassCount--;
+            } else {
+                //Delete plant
+                setDead(true);
+            }
+        }
+
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/BiomassPlugin.java

@@ -0,0 +1,37 @@
+package net.simon987.biomassplugin;
+
+import com.mongodb.DBObject;
+import net.simon987.biomassplugin.event.ObjectDeathListener;
+import net.simon987.biomassplugin.event.WorldCreationListener;
+import net.simon987.biomassplugin.event.WorldUpdateListener;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.io.GameObjectDeserializer;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.ServerPlugin;
+
+public class BiomassPlugin extends ServerPlugin implements GameObjectDeserializer {
+
+
+    @Override
+    public void init(ServerConfiguration config) {
+        listeners.add(new WorldCreationListener());
+        listeners.add(new WorldUpdateListener(config));
+        listeners.add(new ObjectDeathListener(config));
+
+        LogManager.LOGGER.info("Initialised Biomass plugin");
+    }
+
+    @Override
+    public GameObject deserializeObject(DBObject object) {
+
+        int objType = (int) object.get("t");
+
+        if (objType == BiomassBlob.ID) {
+
+            return BiomassBlob.deserialize(object);
+        }
+
+        return null;
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/WorldUtils.java

@@ -0,0 +1,81 @@
+package net.simon987.biomassplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.Random;
+
+public class WorldUtils {
+
+    /**
+     * Generate a list of biomass blobs for a world
+     */
+    public static ArrayList<BiomassBlob> generateBlobs(World world, int minCount, int maxCount, int yield) {
+
+        Random random = new Random();
+        int blobCount = random.nextInt(maxCount - minCount) + minCount;
+        ArrayList<BiomassBlob> biomassBlobs = new ArrayList<>(blobCount);
+
+        //Count number of plain tiles. If there is less plain tiles than desired amount of blobs,
+        //set the desired amount of blobs to the plain tile count
+        int[][] tiles = world.getTileMap().getTiles();
+        int plainCount = 0;
+        for (int y = 0; y < World.WORLD_SIZE; y++) {
+            for (int x = 0; x < World.WORLD_SIZE; x++) {
+
+                if (tiles[x][y] == 0) {
+                    plainCount++;
+                }
+            }
+        }
+
+        if (blobCount > plainCount) {
+            blobCount = plainCount;
+        }
+
+        outerLoop:
+        for (int i = 0; i < blobCount; i++) {
+
+            Point p = world.getTileMap().getRandomPlainTile();
+            if (p != null) {
+
+                //Don't block worlds
+                int counter = 0;
+                while (p.x == 0 || p.y == 0 || p.x == World.WORLD_SIZE - 1 || p.y == World.WORLD_SIZE - 1 ||
+                        world.getGameObjectsAt(p.x, p.y).size() != 0) {
+                    p = world.getTileMap().getRandomPlainTile();
+                    counter++;
+
+                    if (counter > 25) {
+                        continue outerLoop;
+                    }
+                }
+
+                for (BiomassBlob biomassBlob : biomassBlobs) {
+                    if (biomassBlob.getX() == p.x && biomassBlob.getY() == p.y) {
+                        //There is already a blob here
+                        continue outerLoop;
+                    }
+                }
+
+                BiomassBlob biomassBlob = new BiomassBlob();
+                biomassBlob.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                // biomassBlob.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
+                biomassBlob.setBiomassCount(yield);
+                biomassBlob.setX(p.x);
+                biomassBlob.setY(p.y);
+                biomassBlob.setWorld(world);
+
+                biomassBlobs.add(biomassBlob);
+            }
+        }
+
+        LogManager.LOGGER.info("Generated " + biomassBlobs.size() + " biomassBlobs for World (" + world.getX() + ',' +
+                world.getY() + ')');
+
+        return biomassBlobs;
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/ObjectDeathListener.java

@@ -0,0 +1,71 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.server.GameServer;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.ObjectDeathEvent;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+/**
+ * Handles ObjectDeathEvent events
+ */
+public class ObjectDeathListener implements GameEventListener {
+
+    private int biomassDropCount;
+
+    public ObjectDeathListener(ServerConfiguration config) {
+        biomassDropCount = config.getInt("harvester_biomass_drop_count");
+
+    }
+
+    @Override
+    public Class getListenedEventType() {
+        return ObjectDeathEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+        // TODO: setup enum with all GameObject type IDs
+        if (((ObjectDeathEvent) event).getSourceObjectId() == 10) {
+            //An HarvesterNPC ObjectDeathEvent is received
+            GameObject dyingHarvesterNPC = (GameObject)event.getSource();
+
+
+            //Don't spawn biomass on World border
+            if (dyingHarvesterNPC.getX() != 0 && dyingHarvesterNPC.getX() != World.WORLD_SIZE - 1 &&
+                    dyingHarvesterNPC.getY() != 0 && dyingHarvesterNPC.getY() != World.WORLD_SIZE - 1) {
+                //Create a new biomass
+                BiomassBlob newBiomassBlob = createBiomassBlobAt(
+                        dyingHarvesterNPC.getX(), dyingHarvesterNPC.getY(), dyingHarvesterNPC.getWorld());
+                //Add it to the world game objects
+                dyingHarvesterNPC.getWorld().addObject(newBiomassBlob);
+                LogManager.LOGGER.fine("Spawned biomass at (" + newBiomassBlob.getX() +
+                        ", " + newBiomassBlob.getY() + ")");
+            }
+        }
+    }
+
+    /**
+     * Create and return a biomass at the given x, y coordinates and in the world
+     * @param x x coord of biomass location
+     * @param y y coord of biomass location
+     * @param world world in which the biomass will be created in
+     * @return the new BiomassBlob created
+     */
+    private BiomassBlob createBiomassBlobAt(int x, int y, World world) {
+
+        BiomassBlob biomassBlob = new BiomassBlob();
+        biomassBlob.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+        // biomassBlob.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
+        biomassBlob.setBiomassCount(biomassDropCount);
+        biomassBlob.setX(x);
+        biomassBlob.setY(y);
+        biomassBlob.setWorld(world);
+
+        return biomassBlob;
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/WorldCreationListener.java

@@ -0,0 +1,33 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.biomassplugin.WorldUtils;
+import net.simon987.server.GameServer;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldGenerationEvent;
+
+import java.util.ArrayList;
+
+public class WorldCreationListener implements GameEventListener {
+    @Override
+    public Class getListenedEventType() {
+        return WorldGenerationEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+
+        int minCount = GameServer.INSTANCE.getConfig().getInt("minBiomassCount");
+        int maxCount = GameServer.INSTANCE.getConfig().getInt("maxBiomassCount");
+        int yield = GameServer.INSTANCE.getConfig().getInt("biomass_yield");
+
+        ArrayList<BiomassBlob> biomassBlobs = WorldUtils.generateBlobs(((WorldGenerationEvent) event).getWorld(),
+                minCount, maxCount, yield);
+
+        for (BiomassBlob blob : biomassBlobs) {
+            ((WorldGenerationEvent) event).getWorld().addObject(blob);
+        }
+
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/WorldUpdateListener.java

@@ -0,0 +1,74 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.biomassplugin.WorldUtils;
+import net.simon987.server.GameServer;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldUpdateEvent;
+import net.simon987.server.game.World;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+
+public class WorldUpdateListener implements GameEventListener {
+
+    private HashMap<World, Long> worldWaitMap = new HashMap<>(200);
+
+    private static int minBlobCount;
+    private static int maxBlobCount;
+    private static int blobYield;
+    private static int waitTime;
+    private static int blobThreshold;
+
+    public WorldUpdateListener(ServerConfiguration config) {
+
+        minBlobCount = config.getInt("minBiomassRespawnCount");
+        maxBlobCount = config.getInt("maxBiomassRespawnCount");
+        waitTime = config.getInt("biomassRespawnTime");
+        blobThreshold = config.getInt("biomassRespawnThreshold");
+        blobYield = config.getInt("biomass_yield");
+
+    }
+
+    @Override
+    public Class getListenedEventType() {
+        return WorldUpdateEvent.class;
+    }
+
+
+    @Override
+    public void handle(GameEvent event) {
+
+        World world = ((WorldUpdateEvent) event).getWorld();
+
+        //If there is less than the respawn threshold,
+        if (world.findObjects(BiomassBlob.class).size() < blobThreshold) {
+
+            //Set a timer for respawn_time ticks
+            if (!worldWaitMap.containsKey(world) || worldWaitMap.get(world) == 0L) {
+                worldWaitMap.put(world, GameServer.INSTANCE.getGameUniverse().getTime() + waitTime);
+            } else {
+
+                long waitUntil = worldWaitMap.get(world);
+
+                if (GameServer.INSTANCE.getGameUniverse().getTime() >= waitUntil) {
+
+                    //If the timer was set less than respawn_time ticks ago, respawn the blobs
+                    ArrayList<BiomassBlob> newBlobs = WorldUtils.generateBlobs(world, minBlobCount,
+                            maxBlobCount, blobYield);
+                    for (BiomassBlob blob : newBlobs) {
+                        world.addObject(blob);
+                    }
+
+                    //Set the 'waitUntil' time to 0 to indicate that we are not waiting
+                    worldWaitMap.replace(world, 0L);
+                }
+            }
+
+        }
+
+    }
+}

Plugin Plant/src/main/resources/plugin.properties

@@ -0,0 +1,3 @@
+classpath=net.simon987.biomassplugin.BiomassPlugin
+name=Biomass Plugin
+version=1.0

Plugin Plant/src/net/simon987/plantplugin/Plant.java

@@ -1,160 +0,0 @@
-package net.simon987.plantplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.game.GameObject;
-import net.simon987.server.game.InventoryHolder;
-import net.simon987.server.game.Updatable;
-import org.json.simple.JSONObject;
-
-public class Plant extends GameObject implements Updatable, InventoryHolder{
-
-    private static final char MAP_INFO = 0x4000;
-    public static final int ID = 2;
-
-    /**
-     * Grow time (see config.properties)
-     */
-    private static final int GROW_TIME = GameServer.INSTANCE.getConfig().getInt("plant_grow_time");
-
-    /**
-     * Game time of the creation of this Plant
-     */
-    private long creationTime;
-
-    /**
-     * Whether the plant is grown or not
-     */
-    private boolean grown;
-
-    /**
-     * Yield of the plant, in biomass units
-     */
-    private int biomassCount;
-    /**
-     * Style of the plant (Only visual)
-     */
-    private int style;
-
-    private static final int ITM_BIOMASS = 1;
-
-    @Override
-    public char getMapInfo() {
-        return MAP_INFO;
-    }
-
-    @Override
-    public JSONObject serialise() {
-
-        JSONObject json = new JSONObject();
-
-        json.put("type", ID);
-        json.put("id", getObjectId());
-        json.put("x", getX());
-        json.put("y", getY());
-        json.put("creationTime", creationTime);
-        json.put("grown", grown);
-        json.put("biomassCount", biomassCount);
-        json.put("style", style);
-
-        return json;
-    }
-
-    /**
-     * Called every tick
-     */
-    @Override
-    public void update() {
-        if (!grown) {
-            //Check grow
-            if (creationTime + GROW_TIME <= GameServer.INSTANCE.getGameUniverse().getTime()) {
-                grown = true;
-                biomassCount = GameServer.INSTANCE.getConfig().getInt("plant_yield");
-            }
-        }
-    }
-
-    public long getCreationTime() {
-        return creationTime;
-    }
-
-    public void setCreationTime(long creationTime) {
-        this.creationTime = creationTime;
-    }
-
-    public boolean isGrown() {
-        return grown;
-    }
-
-    public void setGrown(boolean grown) {
-        this.grown = grown;
-    }
-
-    public int getBiomassCount() {
-        return biomassCount;
-    }
-
-    public void setBiomassCount(int biomassCount) {
-        this.biomassCount = biomassCount;
-    }
-
-    public int getStyle() {
-        return style;
-    }
-
-    public void setStyle(int style) {
-        this.style = style;
-    }
-
-    public static Plant deserialize(JSONObject json){
-
-        Plant plant = new Plant();
-
-        plant.setObjectId((int)(long)json.get("id"));
-        plant.setX((int)(long)json.get("x"));
-        plant.setY((int)(long)json.get("y"));
-        plant.grown = (boolean)json.get("grown");
-        plant.creationTime = (long)json.get("creationTime");
-        plant.style = (int)(long)json.get("style");
-        plant.biomassCount = (int)(long)json.get("biomassCount");
-
-        return plant;
-    }
-
-    /**
-     * Called when an object attempts to place an item in this Plant
-     *
-     * @param item item id (see MarConstants.ITEM_*)
-     * @return Always returns false
-     */
-    @Override
-    public boolean placeItem(int item) {
-        //Why would you want to place an item in a plant?
-        return false;
-    }
-
-    @Override
-    public boolean canTakeItem(int item) {
-        return item == ITM_BIOMASS && grown && biomassCount >= 1;
-    }
-
-    /**
-     * Called when an object attempts to take an item from this Plant.
-     * If the object requests biomass, it will be subtracted from biomassCount, and
-     * if it reaches 0, the plant is deleted
-     *
-     * @param item item id (see MarConstants.ITEM_*)
-     */
-    @Override
-    public void takeItem(int item) {
-
-        if (item == ITM_BIOMASS) {
-            if (grown && biomassCount > 1) {
-                biomassCount--;
-            } else if (grown) {
-                //Delete plant
-                setDead(true);
-            }
-        }
-
-    }
-}

Plugin Plant/src/net/simon987/plantplugin/PlantPlugin.java

@@ -1,32 +0,0 @@
-package net.simon987.plantplugin;
-
-import net.simon987.plantplugin.event.WorldCreationListener;
-import net.simon987.server.game.GameObject;
-import net.simon987.server.io.GameObjectDeserializer;
-import net.simon987.server.logging.LogManager;
-import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
-
-public class PlantPlugin extends ServerPlugin implements GameObjectDeserializer {
-
-
-
-    @Override
-    public void init() {
-        listeners.add(new WorldCreationListener());
-        LogManager.LOGGER.info("Initialised Plant plugin");
-    }
-
-    @Override
-    public GameObject deserializeObject(JSONObject object) {
-
-        int objType = (int)(long)object.get("type");
-
-        if(objType == Plant.ID) {
-
-            return Plant.deserialize(object);
-        }
-
-        return null;
-    }
-}

Plugin Plant/src/net/simon987/plantplugin/event/WorldCreationListener.java

@@ -1,96 +0,0 @@
-package net.simon987.plantplugin.event;
-
-import net.simon987.plantplugin.Plant;
-import net.simon987.server.GameServer;
-import net.simon987.server.event.GameEvent;
-import net.simon987.server.event.GameEventListener;
-import net.simon987.server.event.WorldGenerationEvent;
-import net.simon987.server.game.World;
-import net.simon987.server.logging.LogManager;
-
-import java.awt.*;
-import java.util.ArrayList;
-import java.util.Random;
-
-public class WorldCreationListener implements GameEventListener {
-    @Override
-    public Class getListenedEventType() {
-        return WorldGenerationEvent.class;
-    }
-
-    @Override
-    public void handle(GameEvent event) {
-
-        ArrayList<Plant> plants = generatePlants(((WorldGenerationEvent)event).getWorld());
-
-        ((WorldGenerationEvent)event).getWorld().getGameObjects().addAll(plants);
-
-    }
-
-    /**
-     * Generate a list of plants for a world
-     */
-    public ArrayList<Plant> generatePlants(World world) {
-
-        int minTreeCount = GameServer.INSTANCE.getConfig().getInt("minTreeCount");
-        int maxTreeCount = GameServer.INSTANCE.getConfig().getInt("maxTreeCount");
-        int plant_yield = GameServer.INSTANCE.getConfig().getInt("plant_yield");
-
-        Random random = new Random();
-        int treeCount = random.nextInt(maxTreeCount - minTreeCount) + minTreeCount;
-        ArrayList<Plant> plants = new ArrayList<>(maxTreeCount);
-
-        //Count number of plain tiles. If there is less plain tiles than desired amount of trees,
-        //set the desired amount of trees to the plain tile count
-        int[][] tiles = world.getTileMap().getTiles();
-        int plainCount = 0;
-        for (int y = 0; y < World.WORLD_SIZE; y++) {
-            for (int x = 0; x < World.WORLD_SIZE; x++) {
-
-                if (tiles[x][y] == 0) {
-                    plainCount++;
-                }
-            }
-        }
-
-        if (treeCount > plainCount) {
-            treeCount = plainCount;
-        }
-
-        outerLoop:
-        for (int i = 0; i < treeCount; i++) {
-
-            Point p = world.getTileMap().getRandomPlainTile();
-            if (p != null) {
-
-                //Don't block worlds
-                while (p.x == 0 || p.y == 0 || p.x == World.WORLD_SIZE - 1 || p.y == World.WORLD_SIZE - 1) {
-                    p = world.getTileMap().getRandomPlainTile();
-                }
-
-                for (Plant plant : plants) {
-                    if (plant.getX() == p.x && plant.getY() == p.y) {
-                        //There is already a plant here
-                        continue outerLoop;
-                    }
-                }
-
-                Plant plant = new Plant();
-                plant.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
-                plant.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
-                plant.setBiomassCount(plant_yield);
-                plant.setCreationTime(0); // Plants generated by the world generator always have creationTime of 0
-                plant.setX(p.x);
-                plant.setY(p.y);
-                plant.setWorld(world);
-
-                plants.add(plant);
-            }
-        }
-
-        LogManager.LOGGER.info("Generated " + plants.size() + " plants for World (" + world.getX() + ',' +
-                world.getY() + ')');
-
-        return plants;
-    }
-}

README.md

@@ -4,8 +4,83 @@ In its current state, players can walk around the game universe and collect Biom
 
 ![screenshot from 2017-11-12 13-01-43](https://user-images.githubusercontent.com/7120851/32701793-e5d07e98-c7a9-11e7-9931-f8db7b287994.png)
 
-Wiki: [GitHub](https://github.com/simon987/Much-Assembly-Required/wiki)    
+Wiki: [GitHub](https://github.com/simon987/Much-Assembly-Required/wiki)
 Chat: [Slack](https://join.slack.com/t/muchassemblyrequired/shared_invite/enQtMjY3Mjc1OTUwNjEwLTkyOTIwOTA5OGY4MDVlMGI4NzM5YzlhMWJiMGY1OWE2NjUxODQ1NWQ1YTcxMTA1NGZkYzNjYzMyM2E1ODdmNzg)
 
+## VS Code Extensions
+- [Much Assembly Required (Upload on Save)](https://marketplace.visualstudio.com/items?itemName=tomhodder.much-assembly-required-upload-on-save) by tomhodder
+- [Much Assembly Required Language Support](https://marketplace.visualstudio.com/items?itemName=PJB3005.much-assembly-required-language-support) by PJB3005
 
-_Building instructions coming soon_
+# Deploying the server 
+
+Note: You can find the frontend [here](https://github.com/simon987/Much-Assembly-Required-Frontend)
+
+
+## Linux (Ubuntu 16.04)
+```bash
+# Install tools
+sudo apt install git maven openjdk-8-jdk
+
+# Obtain source files
+git clone https://github.com/simon987/Much-Assembly-Required.git
+
+# Build
+cd Much-Assembly-Required
+mvn package
+
+# Run
+cd target
+java -jar server-1.2a.jar
+```
+
+## Windows (tested on Windows 10)
+
+Installation instructions:
+1. Download the JDK from [here](http://www.oracle.com/technetwork/java/javase/downloads/index.html).
+Install the JDK and update your PATH and JAVA_HOME enviroment variables.
+2. Download Maven from [here](https://maven.apache.org/).
+Install Maven (following the README) and update your PATH enviroment variable.
+3. Download Mongo DB Community from [here](https://www.mongodb.com/download-center#community).
+Install Mongo DB following the instructions [here](https://docs.mongodb.com/manual/tutorial/install-mongodb-on-windows/).
+Update your PATH enviroment variable.
+
+Building instructions:
+```batch
+:: Builds the server
+cd Much-Assembly-Required
+mvn package
+```
+
+Running instructions:
+1. In one Command Prompt window, run Mongo DB:
+```batch
+:: Runs Mongo DB
+mongod
+```
+2. In a second Command Prompt window, run the MAR server:
+```batch
+:: Runs the MAR server
+cd Much-Assembly-Required\target
+java -jar server-1.2a.jar
+```
+3. Run the frontend, following the instructions that you can find [here](https://github.com/simon987/Much-Assembly-Required-Frontend).
+
+
+## Docker
+### Requirements  
+
+1. [Docker Compose](https://docs.docker.com/compose/install/#install-compose) (and dependencies)
+
+### Installation
+
+Once Docker and Docker Compose are installed, you can build and start
+this application by running the following command inside this
+application's directory:
+
+`docker-compose up`
+
+This will start MySQL and then build and run this application. It will
+be available via http://localhost.
+
+Note that there is currently no frontend web application serving the
+WebSocket feed served by the `Server` application!

Server/Server.iml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-text:1.2" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.7" level="project" />
+    <orderEntry type="library" name="Maven: org.mongodb:mongo-java-driver:2.10.1" level="project" />
+  </component>
+</module>

Server/pom.xml

@@ -0,0 +1,134 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+
+    <build>
+
+        <plugins>
+            <plugin>
+                <artifactId>maven-resources-plugin</artifactId>
+                <version>3.0.2</version>
+                <executions>
+                    <execution>
+                        <id>default-resources</id>
+                        <!-- here the phase you need -->
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>resources</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>../target/</outputDirectory>
+                            <resources>
+                                <resource>
+                                    <directory>../Server/src/main/resources</directory>
+                                    <filtering>true</filtering>
+                                    <includes>
+                                        <include>config.properties</include>
+                                    </includes>
+                                </resource>
+                            </resources>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <version>3.6.2</version>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy-dependencies</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>../target/libs</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.0.2</version>
+                <configuration>
+                    <outputDirectory>../target</outputDirectory>
+                    <archive>
+                        <manifest>
+                            <mainClass>net.simon987.server.Main</mainClass>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>libs/</classpathPrefix>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.7.2</version>
+                <configuration>
+                    <workingDirectory>./src/main/resources</workingDirectory>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <groupId>net.simon987.server</groupId>
+    <artifactId>server</artifactId>
+    <version>1.2a</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.java-websocket</groupId>
+            <artifactId>Java-WebSocket</artifactId>
+            <version>1.3.6</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.42</version>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>1.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mongodb</groupId>
+            <artifactId>mongo-java-driver</artifactId>
+            <version>2.10.1</version>
+        </dependency>
+
+    </dependencies>
+
+    <properties>
+        <!-- explicitly set build encoding so not altered by build platform defaults -->
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

Server/src/main/java/net/simon987/server/GameServer.java

@@ -0,0 +1,277 @@
+package net.simon987.server;
+
+
+import com.mongodb.*;
+import net.simon987.server.assembly.exception.CancelledException;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventDispatcher;
+import net.simon987.server.event.TickEvent;
+import net.simon987.server.game.DayNightCycle;
+import net.simon987.server.game.GameUniverse;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.PluginManager;
+import net.simon987.server.user.User;
+import net.simon987.server.webserver.SocketServer;
+
+import java.io.File;
+import java.net.UnknownHostException;
+
+public class GameServer implements Runnable {
+
+    public final static GameServer INSTANCE = new GameServer();
+
+    private GameUniverse gameUniverse;
+    private GameEventDispatcher eventDispatcher;
+    private PluginManager pluginManager;
+
+    private ServerConfiguration config;
+
+    private SocketServer socketServer;
+
+    private int maxExecutionTime;
+
+    private DayNightCycle dayNightCycle;
+
+	private MongoClient mongo = null;
+
+    public GameServer() {
+
+        this.config = new ServerConfiguration("config.properties");
+
+        try{
+	        mongo = new MongoClient("localhost", 27017);
+        } catch (UnknownHostException e) {
+            e.printStackTrace();
+        }
+
+        gameUniverse = new GameUniverse(config);
+        gameUniverse.setMongo(mongo);
+        pluginManager = new PluginManager();
+
+        maxExecutionTime = config.getInt("user_timeout");
+
+
+        dayNightCycle = new DayNightCycle();
+
+        //Load all plugins in plugins folder, if it doesn't exist, create it
+        File pluginDir = new File("plugins/");
+        File[] pluginDirListing = pluginDir.listFiles();
+
+        if (pluginDirListing != null) {
+            for (File pluginFile : pluginDirListing) {
+
+                if (pluginFile.getName().endsWith(".jar")) {
+                    pluginManager.load(pluginFile, config);
+                }
+
+            }
+        } else {
+            if (!pluginDir.mkdir()) {
+                LogManager.LOGGER.severe("Couldn't create plugin directory");
+            }
+        }
+
+        eventDispatcher = new GameEventDispatcher(pluginManager);
+        eventDispatcher.getListeners().add(dayNightCycle);
+
+    }
+
+    public GameUniverse getGameUniverse() {
+        return gameUniverse;
+    }
+
+    public GameEventDispatcher getEventDispatcher() {
+        return eventDispatcher;
+    }
+
+    @Override
+    public void run() {
+        LogManager.LOGGER.info("(G) Started game loop");
+
+        long startTime; //Start time of the loop
+        long uTime;     //update time
+        long waitTime;  //time to wait
+
+        boolean running = true;
+
+        while (running) {
+
+            startTime = System.currentTimeMillis();
+
+            tick();
+
+            uTime = System.currentTimeMillis() - startTime;
+            waitTime = config.getInt("tick_length") - uTime;
+
+            LogManager.LOGGER.info("Wait time : " + waitTime + "ms | Update time: " + uTime + "ms | " + (int) (((double) uTime / waitTime) * 100) + "% load");
+
+            try {
+                if (waitTime >= 0) {
+                    Thread.sleep(waitTime);
+                }
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+
+        }
+
+
+    }
+
+    private void tick() {
+        gameUniverse.incrementTime();
+
+        //Dispatch tick event
+        GameEvent event = new TickEvent(gameUniverse.getTime());
+        eventDispatcher.dispatch(event); //Ignore cancellation
+
+
+        //Process user code
+        for (User user : gameUniverse.getUsers()) {
+
+            if (user.getCpu() != null) {
+                try {
+
+                    int timeout = Math.min(user.getControlledUnit().getEnergy(), maxExecutionTime);
+
+                    user.getCpu().reset();
+                    int cost = user.getCpu().execute(timeout);
+                    user.getControlledUnit().spendEnergy(cost);
+
+                } catch (Exception e) {
+                    LogManager.LOGGER.severe("Error executing " + user.getUsername() + "'s code");
+                    e.printStackTrace();
+                }
+
+            }
+        }
+
+        //Process each worlds
+        int updatedWorlds = 0;
+        for (World world : gameUniverse.getWorlds()) {
+            if (world.shouldUpdate()) {
+                world.update();
+                updatedWorlds++;
+            }
+        }
+
+        //Save
+        if (gameUniverse.getTime() % config.getInt("save_interval") == 0) {
+            save();
+        }
+
+        socketServer.tick();
+
+        LogManager.LOGGER.info("Processed " + gameUniverse.getWorldCount() + " worlds (" + updatedWorlds +
+                ") updated");
+    }
+
+
+
+    void load() {
+
+        LogManager.LOGGER.info("Loading all data from MongoDB");
+
+        DB db = mongo.getDB("mar");
+
+        DBCollection worlds = db.getCollection("world");
+        DBCollection users = db.getCollection("user");
+        DBCollection server = db.getCollection("server");
+
+        BasicDBObject whereQuery = new BasicDBObject();
+        whereQuery.put("shouldUpdate", true);
+        DBCursor cursor = worlds.find(whereQuery);
+        GameUniverse universe = GameServer.INSTANCE.getGameUniverse();
+        while (cursor.hasNext()) {
+        	World w = World.deserialize(cursor.next());
+            universe.addWorld(w);
+        }
+
+        //Load users
+        cursor = users.find();
+        while (cursor.hasNext()) {
+            try {
+                universe.addUser(User.deserialize(cursor.next()));
+            } catch (CancelledException e) {
+                e.printStackTrace();
+            }
+        }
+
+        //Load misc server info
+        cursor = server.find();
+        if (cursor.hasNext()) {
+            DBObject serverObj = cursor.next();
+            gameUniverse.setTime((long) serverObj.get("time"));
+            gameUniverse.setNextObjectId((long) serverObj.get("nextObjectId"));
+        }
+
+        LogManager.LOGGER.info("Done loading! W:" + GameServer.INSTANCE.getGameUniverse().getWorldCount() +
+                " | U:" + GameServer.INSTANCE.getGameUniverse().getUserCount());
+    }
+
+    private void save() {
+
+        LogManager.LOGGER.info("Saving to MongoDB | W:" + gameUniverse.getWorldCount() + " | U:" + gameUniverse.getUserCount());
+        try{
+	        DB db = mongo.getDB("mar");
+
+	        int unloaded_worlds = 0;
+
+	        DBCollection worlds = db.getCollection("world");
+	        DBCollection users = db.getCollection("user");
+	        DBCollection server = db.getCollection("server");
+
+	        int insertedWorlds = 0;
+	        GameUniverse universe = GameServer.INSTANCE.getGameUniverse();
+            for (World w : universe.getWorlds()) {
+//	            LogManager.LOGGER.fine("Saving world "+w.getId()+" to mongodb");
+                insertedWorlds++;
+	            worlds.save(w.mongoSerialise());
+	                
+	         	// If the world should unload, it is removed from the Universe after having been saved. 
+	        	if (w.shouldUnload()){
+	        		unloaded_worlds++;
+//				 	LogManager.LOGGER.fine("Unloading world "+w.getId()+" from universe");
+                    universe.removeWorld(w);
+	        	}
+	        }
+
+            for (User u : GameServer.INSTANCE.getGameUniverse().getUsers()) {
+
+	            if (!u.isGuest()) {
+	            	users.save(u.mongoSerialise());
+	            }
+
+	        }
+
+	        BasicDBObject serverObj = new BasicDBObject();
+	        serverObj.put("_id","serverinfo"); // a constant id ensures only one entry is kept and updated, instead of a new entry created every save.
+	        serverObj.put("time", gameUniverse.getTime());
+	        serverObj.put("nextObjectId", gameUniverse.getNextObjectId());
+			server.save(serverObj);
+
+			LogManager.LOGGER.info(""+insertedWorlds+" worlds saved, "+unloaded_worlds+" unloaded");
+	        LogManager.LOGGER.info("Done!");
+        } catch (Exception e) {
+            LogManager.LOGGER.severe("Problem happened during save function");
+            e.printStackTrace();
+        }
+    }
+
+    public ServerConfiguration getConfig() {
+        return config;
+    }
+
+    public PluginManager getPluginManager() {
+        return pluginManager;
+    }
+
+    public void setSocketServer(SocketServer socketServer) {
+        this.socketServer = socketServer;
+    }
+
+    public DayNightCycle getDayNightCycle() {
+        return dayNightCycle;
+    }
+}

Server/src/main/java/net/simon987/server/Main.java

@@ -3,19 +3,17 @@ package net.simon987.server;
 import net.simon987.server.logging.LogManager;
 import net.simon987.server.webserver.SocketServer;
 
-import java.io.File;
 import java.net.InetSocketAddress;
 
 
 public class Main {
-    public static void main(String[] args){
+    public static void main(String[] args) {
 
-
-        LogManager.initialize();
-        ServerConfiguration config = new ServerConfiguration(new File("config.properties"));
+        ServerConfiguration config = new ServerConfiguration("config.properties");
+        LogManager.initialize(config);
 
         //Load
-        GameServer.INSTANCE.getGameUniverse().load(new File("save.json"));
+        GameServer.INSTANCE.load();
 
         SocketServer socketServer = new SocketServer(new InetSocketAddress(config.getString("webSocket_host"),
                 config.getInt("webSocket_port")), config);

Server/src/main/java/net/simon987/server/ServerConfiguration.java

@@ -6,6 +6,7 @@ import net.simon987.server.logging.LogManager;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.Properties;
 
 /**
@@ -18,11 +19,11 @@ public class ServerConfiguration {
      */
     private Properties properties;
 
-    public ServerConfiguration(File file) {
+    public ServerConfiguration(String file) {
         try {
             properties = new Properties();
-
-            properties.load(new FileInputStream(file));
+            InputStream is = new FileInputStream("config.properties");
+            properties.load(is);
 
         } catch (IOException e) {
             LogManager.LOGGER.severe("Problem loading server configuration: " + e.getMessage());

Server/src/main/java/net/simon987/server/assembly/Assembler.java

@@ -3,11 +3,15 @@ package net.simon987.server.assembly;
 import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.exception.*;
 import net.simon987.server.logging.LogManager;
+import org.apache.commons.text.StringEscapeUtils;
 
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * Top-level class for assembly operations.
@@ -20,6 +24,8 @@ public class Assembler {
 
     private RegisterSet registerSet;
 
+    private static final int MEM_SIZE = 0x10000;  // Size in words todo load from config
+
     public Assembler(InstructionSet instructionSet, RegisterSet registerSet, ServerConfiguration config) {
         this.instructionSet = instructionSet;
         this.registerSet = registerSet;
@@ -47,11 +53,9 @@ public class Assembler {
      * @return The line without its label part
      */
     private static String removeLabel(String line) {
-        if (line.indexOf(':') != -1) {
-            return line.substring(line.indexOf(':') + 1);
-        } else {
-            return line;
-        }
+
+        return line.replaceAll("^\\s*\\b\\w*\\b:", "");
+
     }
 
     /**
@@ -93,10 +97,11 @@ public class Assembler {
         line = removeComment(line);
 
         //Check for labels
-        if (line.indexOf(':') != -1) {
+        Pattern pattern = Pattern.compile("^\\s*\\b\\w*\\b:");
+        Matcher matcher = pattern.matcher(line);
 
-            line = line.substring(0, line.indexOf(':'));
-            String label = line.trim();
+        if (matcher.find()) {
+            String label = matcher.group(0).substring(0, matcher.group(0).length() - 1).trim();
 
             LogManager.LOGGER.fine("DEBUG: Label " + label + " @ " + (result.origin + currentOffset));
             result.labels.put(label, (char) (result.origin + currentOffset));
@@ -129,11 +134,12 @@ public class Assembler {
 
         //System.out.println(line);
 
-        if (line.substring(0, 2).toUpperCase().equals("DW")) {
+        if (line.length() >= 2 && line.substring(0, 2).toUpperCase().equals("DW")) {
 
             try {
 
-                String[] values = line.substring(2, line.length()).split(",");
+                //Special thanks to https://stackoverflow.com/questions/1757065/
+                String[] values = line.substring(2, line.length()).split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
 
                 for (String value : values) {
 
@@ -144,6 +150,14 @@ public class Assembler {
                     //Handle DUP operator
                     if (valueTokens.length == 2 && valueTokens[1].toUpperCase().contains("DUP(")) {
                         out.write(parseDUPOperator16(valueTokens, labels, currentLine));
+                    } else if (value.startsWith("\"") && value.endsWith("\"")) {
+                        //Handle string
+
+                        //Unescape the string
+                        String string = value.substring(1, value.length() - 1);
+                        string = StringEscapeUtils.unescapeJava(string);
+
+                        out.write(string.getBytes(StandardCharsets.UTF_16BE));
                     } else if (labels != null && labels.containsKey(value)) {
                         //Handle label
                         out.writeChar(labels.get(value));
@@ -161,7 +175,18 @@ public class Assembler {
                                 out.writeChar(0);
 
                             } else {
-                                throw new InvalidOperandException("Invalid operand \"" + value + '"', currentLine);
+
+                                //Integer.decode failed, try binary
+                                if (value.startsWith("0b")) {
+                                    try {
+                                        out.writeChar(Integer.parseInt(value.substring(2), 2));
+                                    } catch (NumberFormatException e2) {
+                                        throw new InvalidOperandException("Invalid operand \"" + value + '"', currentLine);
+                                    }
+                                } else {
+                                    throw new InvalidOperandException("Invalid operand \"" + value + '"', currentLine);
+
+                                }
                             }
                         }
                     }
@@ -194,6 +219,11 @@ public class Assembler {
         try {
 
             int factor = Integer.decode(valueTokens[0]);
+
+            if (factor > MEM_SIZE) {
+                throw new InvalidOperandException("Factor '"+factor+"' exceeds total memory size", currentLine);
+            }
+
             String value = valueTokens[1].substring(4, valueTokens[1].lastIndexOf(')'));
 
             //Handle label
@@ -208,7 +238,7 @@ public class Assembler {
 
             } else {
                 //Handle integer value
-                char s = (char)(int)Integer.decode(value);
+                char s = (char) (int) Integer.decode(value);
 
                 for (int i = 0; i < factor; i++) {
                     out.write(Util.getHigherByte(s));
@@ -237,23 +267,25 @@ public class Assembler {
     }
 
     /**
-     * Check for and handle segment declarations (.text & .data)
+     * Check for and handle section declarations (.text & .data)
      *
      * @param line Current line
      */
-    private static void checkForSegmentDeclaration(String line, AssemblyResult result,
+    private static void checkForSectionDeclaration(String line, AssemblyResult result,
                                                    int currentLine, int currentOffset) throws AssemblyException {
 
         String[] tokens = line.split("\\s+");
 
         if (tokens[0].toUpperCase().equals(".TEXT")) {
 
-            result.defineSegment(Segment.TEXT, currentLine, currentOffset);
+            result.defineSecton(Section.TEXT, currentLine, currentOffset);
             throw new PseudoInstructionException(currentLine);
 
         } else if (tokens[0].toUpperCase().equals(".DATA")) {
 
-            result.defineSegment(Segment.DATA, currentLine, currentOffset);
+            LogManager.LOGGER.fine("DEBUG: .data @" + currentLine);
+
+            result.defineSecton(Section.DATA, currentLine, currentOffset);
             throw new PseudoInstructionException(currentLine);
         }
     }
@@ -275,11 +307,11 @@ public class Assembler {
         String[] tokens = line.split("\\s+");
 
 
-        if (line.toUpperCase().contains(" EQU ")) {
+        if (line.toUpperCase().matches(".*\\bEQU\\b.*")) {
             if (tokens[1].toUpperCase().equals("EQU") && tokens.length == 3) {
                 try {
                     //Save value as a label
-                    labels.put(tokens[0], (char)(int)Integer.decode(tokens[2]));
+                    labels.put(tokens[0], (char) (int) Integer.decode(tokens[2]));
                 } catch (NumberFormatException e) {
                     throw new InvalidOperandException("Usage: constant_name EQU immediate_value", currentLine);
                 }
@@ -327,17 +359,23 @@ public class Assembler {
         }
 
         //Pass 2: Save label names and location
-        char currentOffset = 0;
+        int currentOffset = 0;
         for (currentLine = 0; currentLine < lines.length; currentLine++) {
             try {
-                checkForLabel(lines[currentLine], result, currentOffset);
+                checkForLabel(lines[currentLine], result, (char)currentOffset);
 
                 //Increment offset
                 currentOffset += parseInstruction(lines[currentLine], currentLine, instructionSet).length / 2;
 
-            } catch (AssemblyException e) {
+                if (currentOffset >= MEM_SIZE) {
+                    throw new OffsetOverflowException(currentOffset, MEM_SIZE, currentLine);
+                }
+            } catch (FatalAssemblyException e) {
+                //Don't bother parsing the rest of the code, since it will not be assembled anyway
+                break;
+            } catch (AssemblyException e1) {
                 //Ignore error on pass 2
-                //System.out.println(e);
+
             }
         }
 
@@ -358,17 +396,26 @@ public class Assembler {
                 }
 
                 //Check for pseudo instructions
-                checkForSegmentDeclaration(line, result, currentLine, currentOffset);
+                checkForSectionDeclaration(line, result, currentLine, currentOffset);
                 checkForEQUInstruction(line, result.labels, currentLine);
                 checkForORGInstruction(line, result, currentLine);
 
                 //Encode instruction
                 byte[] bytes = parseInstruction(line, currentLine, result.labels, instructionSet);
                 currentOffset += bytes.length / 2;
+
+                if (currentOffset >= MEM_SIZE) {
+                    throw new OffsetOverflowException(currentOffset, MEM_SIZE, currentLine);
+                }
+
                 out.write(bytes);
 
             } catch (EmptyLineException | PseudoInstructionException e) {
                 //Ignore empty lines and pseudo-instructions
+            } catch (FatalAssemblyException asmE) {
+                // Save error, but abort assembly at this line
+                result.exceptions.add(asmE);
+                break;
             } catch (AssemblyException asmE) {
                 //Save errors on pass3
                 result.exceptions.add(asmE);
@@ -377,7 +424,26 @@ public class Assembler {
             }
         }
 
-        result.bytes = out.toByteArray();
+        //If the code contains OffsetOverFlowException(s), don't bother writing the assembled bytes to memory
+        boolean writeToMemory = true;
+        for (Exception e : result.exceptions) {
+            if (e instanceof OffsetOverflowException) {
+                writeToMemory = false;
+            }
+        }
+
+        if (writeToMemory) {
+            result.bytes = out.toByteArray();
+        } else {
+            result.bytes = new byte[0];
+            LogManager.LOGGER.fine("Skipping writing assembled bytes to memory. (OffsetOverflowException)");
+        }
+
+        try {
+            out.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
 
         LogManager.LOGGER.info("Assembled " + result.bytes.length + " bytes (" + result.exceptions.size() + " errors)");
         for (AssemblyException e : result.exceptions) {

Server/src/main/java/net/simon987/server/assembly/AssemblyResult.java

@@ -0,0 +1,124 @@
+package net.simon987.server.assembly;
+
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.assembly.exception.AssemblyException;
+import net.simon987.server.assembly.exception.DuplicateSectionException;
+import net.simon987.server.logging.LogManager;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+/**
+ * Result of an assembly attempt
+ */
+public class AssemblyResult {
+
+    /**
+     * The origin of the program, default is 0x200
+     */
+    public int origin;
+    /**
+     * A list of labels
+     */
+    HashMap<String, Character> labels = new HashMap<>(20);
+    /**
+     * List of exceptions encountered during the assembly attempt,
+     * they will be displayed in the editor
+     */
+    public ArrayList<AssemblyException> exceptions = new ArrayList<>(50);
+    /**
+     * Offset of the code segment
+     */
+    private int codeSectionOffset;
+    /**
+     * Line of the code segment definition
+     */
+    private int codeSectionLine;
+
+    /**
+     * The encoded user code (will be incomplete or invalid if the
+     * assembler encountered an error during assembly)
+     */
+    public byte[] bytes;
+    /**
+     * Offset of the data segment
+     */
+    private int dataSectionOffset;
+    /**
+     * Line of the data segment definition
+     */
+    private int dataSectionLine;
+    /**
+     * Whether or not the code segment is set
+     */
+    private boolean codeSectionSet = false;
+    /**
+     * Whether or not the data segment is set
+     */
+    private boolean dataSectionSet = false;
+
+    AssemblyResult(ServerConfiguration config) {
+        origin = config.getInt("org_offset");
+    }
+
+    /**
+     * Define a section.
+     *
+     * @param section       Section to define
+     * @param currentOffset Current offset, in bytes of the section
+     * @param currentLine   Line number of the section declaration
+     * @throws DuplicateSectionException when a section is defined twice
+     */
+    void defineSecton(Section section, int currentLine, int currentOffset) throws DuplicateSectionException {
+
+        if (section == Section.TEXT) {
+            //Code section
+
+            if (!codeSectionSet) {
+                codeSectionOffset = origin + currentOffset;
+                codeSectionLine = currentLine;
+
+                LogManager.LOGGER.fine("DEBUG: .text offset @" + codeSectionOffset);
+
+
+                codeSectionSet = true;
+            } else {
+                throw new DuplicateSectionException(currentLine);
+            }
+
+        } else {
+            //Data section
+            if (!dataSectionSet) {
+                dataSectionOffset = origin + currentOffset;
+                dataSectionLine = currentLine;
+
+                LogManager.LOGGER.fine("DEBUG: .data offset @" + dataSectionOffset);
+
+                dataSectionSet = true;
+            } else {
+                throw new DuplicateSectionException(currentLine);
+            }
+
+        }
+
+    }
+
+    public char[] getWords() {
+
+        char[] assembledCode = new char[bytes.length / 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().get(assembledCode);
+
+        return assembledCode;
+    }
+
+    public int getCodeSectionOffset() {
+        if (codeSectionSet) {
+            return codeSectionOffset;
+        } else {
+            return origin;
+        }
+    }
+
+}

Server/src/main/java/net/simon987/server/assembly/CPU.java

@@ -1,18 +1,18 @@
 package net.simon987.server.assembly;
 
+import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.exception.CancelledException;
 import net.simon987.server.assembly.instruction.*;
 import net.simon987.server.event.CpuInitialisationEvent;
 import net.simon987.server.event.GameEvent;
-import net.simon987.server.io.JSONSerialisable;
+import net.simon987.server.io.MongoSerialisable;
 import net.simon987.server.logging.LogManager;
 import net.simon987.server.user.User;
-import org.json.simple.JSONArray;
-import org.json.simple.JSONObject;
 
-import java.util.ArrayList;
 import java.util.HashMap;
 
 /**
@@ -20,7 +20,7 @@ import java.util.HashMap;
  * a Memory object and execute them. A CPU object holds registers objects &
  * a Memory object.
  */
-public class CPU implements JSONSerialisable{
+public class CPU implements MongoSerialisable {
 
     /**
      *
@@ -43,10 +43,10 @@ public class CPU implements JSONSerialisable{
     private RegisterSet registerSet;
 
     /**
-     * Offset of the code segment. The code starts to get
-     * executed at this address each tick. Defaults to 0x4000
+     * Offset of the code section. The code starts to get
+     * executed at this address each tick. Defaults to org_offset@config.properties
      */
-    private int codeSegmentOffset;
+    private int codeSectionOffset;
 
     /**
      * Instruction pointer, always points to the next instruction
@@ -60,21 +60,20 @@ public class CPU implements JSONSerialisable{
 
     private ServerConfiguration config;
 
-    private long timeout;
-
     private int registerSetSize;
 
+    private static final char EXECUTION_COST_ADDR = 0x0050;
+    private static final char EXECUTED_INS_ADDR = 0x0051;
+
     /**
      * Creates a new CPU
      */
-    public CPU(ServerConfiguration config, User user) throws CancelledException{
+    public CPU(ServerConfiguration config, User user) throws CancelledException {
         this.config = config;
         instructionSet = new DefaultInstructionSet();
         registerSet = new DefaultRegisterSet();
         attachedHardware = new HashMap<>();
-        codeSegmentOffset = config.getInt("org_offset");
-
-        timeout = config.getInt("user_timeout");
+        codeSectionOffset = config.getInt("org_offset");
 
         instructionSet.add(new JmpInstruction(this));
         instructionSet.add(new JnzInstruction(this));
@@ -98,25 +97,27 @@ public class CPU implements JSONSerialisable{
         instructionSet.add(new JncInstruction(this));
         instructionSet.add(new JnoInstruction(this));
         instructionSet.add(new JoInstruction(this));
+        instructionSet.add(new PushfInstruction(this));
+        instructionSet.add(new PopfInstruction(this));
+        instructionSet.add(new JnaInstruction(this));
+        instructionSet.add(new JaInstruction(this));
 
         status = new Status();
         memory = new Memory(config.getInt("memory_size"));
 
         GameEvent event = new CpuInitialisationEvent(this, user);
         GameServer.INSTANCE.getEventDispatcher().dispatch(event);
-        if(event.isCancelled()){
+        if (event.isCancelled()) {
             throw new CancelledException();
         }
     }
 
     public void reset() {
         status.clear();
-        registerSet.getRegister("SP").setValue(config.getInt("stack_bottom"));
-        registerSet.getRegister("BP").setValue(config.getInt("stack_bottom"));
-        ip = codeSegmentOffset;
+        ip = codeSectionOffset;
     }
 
-    public void execute() {
+    public int execute(int timeout) {
 
         long startTime = System.currentTimeMillis();
         int counter = 0;
@@ -128,10 +129,16 @@ public class CPU implements JSONSerialisable{
         while (!status.isBreakFlag()) {
             counter++;
 
-            if(counter % 1000 == 0){
-                if (System.currentTimeMillis() >= (startTime + timeout)) {
+            if (counter % 10000 == 0) {
+                if (System.currentTimeMillis() > (startTime + timeout)) {
                     LogManager.LOGGER.fine("CPU Timeout " + this + " after " + counter + "instructions (" + timeout + "ms): " + (double) counter / ((double) timeout / 1000) / 1000000 + "MHz");
-                    return;
+
+                    //Write execution cost and instruction count to memory
+                    memory.set(EXECUTION_COST_ADDR, timeout);
+                    memory.set(EXECUTED_INS_ADDR, Util.getHigherWord(counter));
+                    memory.set(EXECUTED_INS_ADDR + 1, Util.getLowerWord(counter));
+
+                    return timeout;
                 }
             }
 
@@ -151,8 +158,17 @@ public class CPU implements JSONSerialisable{
             executeInstruction(instruction, source, destination);
 //            LogManager.LOGGER.info(instruction.getMnemonic());
         }
-        double elapsed = (System.currentTimeMillis() - startTime);
+        int elapsed = (int) (System.currentTimeMillis() - startTime);
+
         LogManager.LOGGER.fine(counter + " instruction in " + elapsed + "ms : " + (double) counter / (elapsed / 1000) / 1000000 + "MHz");
+
+
+        //Write execution cost and instruction count to memory
+        memory.set(EXECUTION_COST_ADDR, elapsed);
+        memory.set(EXECUTED_INS_ADDR, Util.getHigherWord(counter));
+        memory.set(EXECUTED_INS_ADDR + 1, Util.getLowerWord(counter));
+
+        return elapsed;
     }
 
     public void executeInstruction(Instruction instruction, int source, int destination) {
@@ -205,8 +221,7 @@ public class CPU implements JSONSerialisable{
             if (destination == 0) {
                 //Single operand
                 ip++;
-                instruction.execute(sourceValue, status);
-                instruction.execute(memory, memory.get(ip - 1), status); //For POP instruction
+                instruction.execute(memory, memory.get(ip - 1), status);
             } else if (destination == Operand.IMMEDIATE_VALUE) {
                 //Destination is an immediate value
 
@@ -224,7 +239,7 @@ public class CPU implements JSONSerialisable{
             } else if (destination <= registerSetSize * 2) {
                 //Destination is [reg]
                 ip++;
-                instruction.execute(memory, registerSet.get(destination - registerSetSize), memory, sourceValue, status);
+                instruction.execute(memory, registerSet.get(destination - registerSetSize), sourceValue, status);
             } else {
                 //Assuming that destination is [reg + x]
                 ip += 2;
@@ -268,7 +283,7 @@ public class CPU implements JSONSerialisable{
             if (destination == 0) {
                 //Single operand
                 ip++;
-                instruction.execute(memory, registerSet.get(source), status);
+                instruction.execute(memory, registerSet.get(source - registerSetSize), status);
             } else if (destination == Operand.IMMEDIATE_VALUE) {
                 //Destination is an immediate value
                 //this shouldn't happen
@@ -281,11 +296,11 @@ public class CPU implements JSONSerialisable{
             } else if (destination <= registerSetSize) {
                 //Destination is a register
                 ip++;
-                instruction.execute(registerSet, destination, memory, registerSet.get(source), status);
+                instruction.execute(registerSet, destination, memory, registerSet.get(source - registerSetSize), status);
             } else if (destination <= registerSetSize * 2) {
                 //Destination is [reg]
                 ip++;
-                instruction.execute(memory, registerSet.get(destination - registerSetSize), memory, registerSet.get(source), status);
+                instruction.execute(memory, registerSet.get(destination - registerSetSize), memory, registerSet.get(source - registerSetSize), status);
             } else {
                 //Assuming that destination is [reg + x]
                 ip += 2;
@@ -313,7 +328,7 @@ public class CPU implements JSONSerialisable{
                 ip += 2;
                 instruction.execute(memory, memory.get(ip - 1), memory,
                         registerSet.get(source - registerSetSize - registerSetSize) + sourceDisp, status);
-            } else if (destination < registerSetSize) {
+            } else if (destination <= registerSetSize) {
                 //Destination is a register
                 ip++;
                 instruction.execute(registerSet, destination, memory,
@@ -333,47 +348,47 @@ public class CPU implements JSONSerialisable{
     }
 
     @Override
-    public JSONObject serialise() {
+    public BasicDBObject mongoSerialise() {
+        BasicDBObject dbObject = new BasicDBObject();
 
-        JSONObject json = new JSONObject();
+        dbObject.put("memory", memory.mongoSerialise());
 
-        json.put("memory", memory.serialise());
+        dbObject.put("registerSet", registerSet.mongoSerialise());
+        dbObject.put("codeSegmentOffset", codeSectionOffset);
 
-        json.put("registerSet", registerSet.serialise());
-        json.put("codeSegmentOffset", codeSegmentOffset);
+        BasicDBList hardwareList = new BasicDBList();
 
-        JSONArray hardwareList = new JSONArray();
-
-        for(Integer address : attachedHardware.keySet()){
+        for (Integer address : attachedHardware.keySet()) {
 
             CpuHardware hardware = attachedHardware.get(address);
 
-            JSONObject serialisedHw = hardware.serialise();
+            BasicDBObject serialisedHw = hardware.mongoSerialise();
             serialisedHw.put("address", address);
             hardwareList.add(serialisedHw);
         }
 
-        json.put("hardware", hardwareList);
+        dbObject.put("hardware", hardwareList);
+
+        return dbObject;
 
-        return json;
     }
 
-    public static CPU deserialize(JSONObject json, User user) throws CancelledException {
+    public static CPU deserialize(DBObject obj, User user) throws CancelledException {
 
         CPU cpu = new CPU(GameServer.INSTANCE.getConfig(), user);
 
-        cpu.codeSegmentOffset = (int)(long)json.get("codeSegmentOffset");
+        cpu.codeSectionOffset = (int) obj.get("codeSegmentOffset");
 
-        JSONArray hardwareList = (JSONArray)json.get("hardware");
+        BasicDBList hardwareList = (BasicDBList) obj.get("hardware");
 
-        for(JSONObject serialisedHw : (ArrayList<JSONObject>)hardwareList){
-            CpuHardware hw = CpuHardware.deserialize(serialisedHw);
-            hw.setCpu(cpu);
-            cpu.attachHardware(hw, (int)(long)serialisedHw.get("address"));
+        for (Object serialisedHw : hardwareList) {
+            CpuHardware hardware = CpuHardware.deserialize((DBObject) serialisedHw);
+            hardware.setCpu(cpu);
+            cpu.attachHardware(hardware, (int) ((BasicDBObject) serialisedHw).get("address"));
         }
 
-        cpu.memory = Memory.deserialize((JSONObject)json.get("memory"));
-        cpu.registerSet = RegisterSet.deserialize((JSONObject) json.get("registerSet"));
+        cpu.memory = Memory.deserialize((DBObject) obj.get("memory"));
+        cpu.registerSet = RegisterSet.deserialize((DBObject) obj.get("registerSet"));
 
         return cpu;
 
@@ -403,22 +418,22 @@ public class CPU implements JSONSerialisable{
         this.ip = ip;
     }
 
-    public void setCodeSegmentOffset(int codeSegmentOffset) {
-        this.codeSegmentOffset = codeSegmentOffset;
+    public void setCodeSectionOffset(int codeSectionOffset) {
+        this.codeSectionOffset = codeSectionOffset;
     }
 
-    public void attachHardware(CpuHardware hardware, int address){
+    public void attachHardware(CpuHardware hardware, int address) {
         attachedHardware.put(address, hardware);
     }
 
-    public void detachHardware(int address){
+    public void detachHardware(int address) {
         attachedHardware.remove(address);
     }
 
-    public boolean hardwareInterrupt(int address){
+    public boolean hardwareInterrupt(int address) {
         CpuHardware hardware = attachedHardware.get(address);
 
-        if(hardware != null){
+        if (hardware != null) {
             hardware.handleInterrupt(status);
             return true;
         } else {

Server/src/main/java/net/simon987/server/assembly/CpuHardware.java

@@ -1,13 +1,13 @@
 package net.simon987.server.assembly;
 
 
+import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
 import net.simon987.server.io.CpuHardwareDeserializer;
-import net.simon987.server.io.JSONSerialisable;
+import net.simon987.server.io.MongoSerialisable;
 import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
 
-public abstract class CpuHardware implements JSONSerialisable {
+public abstract class CpuHardware implements MongoSerialisable {
 
     CPU cpu;
 
@@ -26,14 +26,14 @@ public abstract class CpuHardware implements JSONSerialisable {
 
     public abstract char getId();
 
-    public static CpuHardware deserialize(JSONObject hwJson){
+    public static CpuHardware deserialize(DBObject obj) {
 
-        for(ServerPlugin plugin : GameServer.INSTANCE.getPluginManager().getPlugins()){
+        for (ServerPlugin plugin : GameServer.INSTANCE.getPluginManager().getPlugins()) {
 
-            if(plugin instanceof CpuHardwareDeserializer){
-                CpuHardware hw = ((CpuHardwareDeserializer) plugin).deserializeHardware(hwJson);
+            if (plugin instanceof CpuHardwareDeserializer) {
+                CpuHardware hw = ((CpuHardwareDeserializer) plugin).deserializeHardware(obj);
 
-                if(hw != null){
+                if (hw != null) {
                     return hw;
                 }
             }

Server/src/main/java/net/simon987/server/assembly/DefaultInstructionSet.java

@@ -44,6 +44,8 @@ public class DefaultInstructionSet implements InstructionSet {
         add(new RclInstruction());
         add(new RcrInstruction());
         add(new SarInstruction());
+        add(new IncInstruction());
+        add(new DecInstruction());
     }
 
     /**
@@ -56,10 +58,10 @@ public class DefaultInstructionSet implements InstructionSet {
     public Instruction get(int opcode) {
 
         Instruction instruction = instructionMap.get(opcode);
-        if(instruction != null){
+        if (instruction != null) {
             return instruction;
         } else {
-           // System.out.println("Invalid instruction " + opcode);
+            // System.out.println("Invalid instruction " + opcode);
             //Todo: Notify user?  Set error flag?
             return defaultInstruction;
         }

Server/src/main/java/net/simon987/server/assembly/Instruction.java

@@ -120,8 +120,8 @@ public abstract class Instruction {
      * Whether or not the instruction is valid without any
      * operands
      */
-    private static boolean noOperandsValid() {
-        return true;
+    public boolean noOperandsValid() {
+        return false;
     }
 
     String getMnemonic() {

Server/src/main/java/net/simon987/server/assembly/MachineCode.java

@@ -67,7 +67,6 @@ class MachineCode {
             LogManager.LOGGER.severe("Couldn't write the dst operand for instruction :" + dst);
         } else {
 
-            //Src is the 5 most significant bits
             value &= 0xF83F; //1111 1000 0011 1111
             dst <<= 6; //0000 0XXX XX00 0000
             value |= dst;

Server/src/main/java/net/simon987/server/assembly/Memory.java

@@ -0,0 +1,167 @@
+package net.simon987.server.assembly;
+
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.GameServer;
+import net.simon987.server.io.MongoSerialisable;
+import net.simon987.server.logging.LogManager;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.Base64;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterOutputStream;
+
+/**
+ * Represents the available memory for a CPU in the game universe
+ */
+public class Memory implements Target, MongoSerialisable {
+
+
+    /**
+     * Contents of the memory
+     */
+    private char[] words;
+
+    /**
+     * Create an empty Memory object
+     *
+     * @param size Size of the memory, in words
+     */
+    public Memory(int size) {
+        words = new char[size];
+    }
+
+    /**
+     * Get the value at an address
+     *
+     * @param address Address of the value
+     * @return 16-bit value at the specified address
+     */
+    @Override
+    public int get(int address) {
+        address = (char) address;
+
+        if (address >= words.length) {
+            LogManager.LOGGER.info("DEBUG: Trying to get memory out of bounds " + address);
+            return 0;
+        }
+
+        return words[address];
+    }
+
+    /**
+     * Write x words from an array at an offset
+     */
+    public boolean write(int offset, char[] src, int srcOffset, int count) {
+
+        if (offset + count > this.words.length || srcOffset >= src.length || count < 0 || offset < 0) {
+            return false;
+        }
+
+        System.arraycopy(src, srcOffset, this.words, offset, count);
+        return true;
+    }
+
+    /**
+     * Set the value at an address
+     *
+     * @param address address of the value to change
+     * @param value   16-bit value to set
+     */
+    @Override
+    public void set(int address, int value) {
+        address = (char) address;
+
+        if (address >= words.length) {
+            LogManager.LOGGER.info("DEBUG: Trying to set memory out of bounds: " + address);
+            return;
+        }
+
+        words[address] = (char) value;
+    }
+
+    /**
+     * Fill the memory with 0s
+     */
+    public void clear() {
+        Arrays.fill(words, (char) 0);
+    }
+
+    /**
+     * Get byte array of the Memory object
+     */
+    public byte[] getBytes() {
+
+        byte[] bytes = new byte[words.length * 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().put(words);
+
+        return bytes;
+    }
+
+    @Override
+    public BasicDBObject mongoSerialise() {
+
+        BasicDBObject dbObject = new BasicDBObject();
+
+        try {
+            ByteArrayOutputStream stream = new ByteArrayOutputStream();
+            Deflater compressor = new Deflater(Deflater.BEST_SPEED, true);
+            DeflaterOutputStream deflaterOutputStream = new DeflaterOutputStream(stream, compressor);
+            deflaterOutputStream.write(getBytes());
+            deflaterOutputStream.close();
+            byte[] compressedBytes = stream.toByteArray();
+
+            dbObject.put("zipBytes", new String(Base64.getEncoder().encode(compressedBytes)));
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return dbObject;
+    }
+
+    public static Memory deserialize(DBObject obj) {
+
+        Memory memory = new Memory(0);
+
+        String zipBytesStr = (String) obj.get("zipBytes");
+
+        if (zipBytesStr != null) {
+            byte[] compressedBytes = Base64.getDecoder().decode((String) obj.get("zipBytes"));
+
+            try {
+                ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                Inflater decompressor = new Inflater(true);
+                InflaterOutputStream inflaterOutputStream = new InflaterOutputStream(baos, decompressor);
+                inflaterOutputStream.write(compressedBytes);
+                inflaterOutputStream.close();
+
+                memory.setBytes(baos.toByteArray());
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        } else {
+            LogManager.LOGGER.severe("Memory was manually deleted");
+            memory = new Memory(GameServer.INSTANCE.getConfig().getInt("memory_size"));
+        }
+
+        return memory;
+    }
+
+    public void setBytes(byte[] bytes) {
+        this.words = new char[bytes.length / 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().get(this.words);
+    }
+
+    public char[] getWords() {
+        return words;
+    }
+}

Server/src/main/java/net/simon987/server/assembly/Operand.java

@@ -113,6 +113,18 @@ public class Operand {
             value = IMMEDIATE_VALUE;
             return true;
         } catch (NumberFormatException e) {
+
+            //Try Binary number (format 0bXXXX)
+            if (text.startsWith("0b")) {
+                try {
+                    data = Integer.parseInt(text.substring(2), 2);
+                    value = IMMEDIATE_VALUE;
+                    return true;
+                } catch (NumberFormatException e2) {
+                    return false;
+                }
+            }
+
             return false;
         }
     }
@@ -212,11 +224,30 @@ public class Operand {
             }
 
             //label is invalid
-
             data = Integer.decode(expr);
             value += registerSet.size() * 2; //refers to memory with disp
             return true;
         } catch (NumberFormatException e) {
+
+            //Integer.decode failed, try binary
+            if (expr.startsWith("+0b")) {
+                try {
+                    data = Integer.parseInt(expr.substring(3), 2);
+                    value += registerSet.size() * 2; //refers to memory with disp
+                    return true;
+                } catch (NumberFormatException e2) {
+                    return false;
+                }
+            } else if (expr.startsWith("-0b")) {
+                try {
+                    data = -Integer.parseInt(expr.substring(3), 2);
+                    value += registerSet.size() * 2; //refers to memory with disp
+                    return true;
+                } catch (NumberFormatException e2) {
+                    return false;
+                }
+            }
+
             return false;
         }
     }

Server/src/main/java/net/simon987/server/assembly/RegisterSet.java

@@ -1,7 +1,10 @@
 package net.simon987.server.assembly;
 
 
-import net.simon987.server.io.JSONSerialisable;
+import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import net.simon987.server.io.MongoSerialisable;
 import net.simon987.server.logging.LogManager;
 import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
@@ -12,7 +15,7 @@ import java.util.HashMap;
 /**
  * A set of registers for a CPU
  */
-public class RegisterSet implements Target, JSONSerialisable {
+public class RegisterSet implements Target, MongoSerialisable {
 
     /**
      * List of registers
@@ -87,7 +90,7 @@ public class RegisterSet implements Target, JSONSerialisable {
 
         Register register = registers.get(address);
 
-        if(register != null){
+        if (register != null) {
             return register.getValue();
         } else {
             return 0;
@@ -106,7 +109,7 @@ public class RegisterSet implements Target, JSONSerialisable {
 
         Register register = registers.get(address);
 
-        if(register != null){
+        if (register != null) {
             register.setValue(value);
         } else {
             LogManager.LOGGER.info("DEBUG: trying to set unknown reg index : " + address);
@@ -142,9 +145,9 @@ public class RegisterSet implements Target, JSONSerialisable {
 
 
     @Override
-    public JSONObject serialise() {
-        JSONArray registers = new JSONArray();
-        for(Integer index : this.registers.keySet()){
+    public BasicDBObject mongoSerialise() {
+        BasicDBList registers = new BasicDBList();
+        for (Integer index : this.registers.keySet()) {
             JSONObject register = new JSONObject();
 
             register.put("index", index);
@@ -154,24 +157,42 @@ public class RegisterSet implements Target, JSONSerialisable {
             registers.add(register);
         }
 
-        JSONObject json = new JSONObject();
-        json.put("registers", registers);
+        BasicDBObject obj = new BasicDBObject();
+        obj.put("registers", registers);
 
-        return json;
+        return obj;
+    }
+
+    public static RegisterSet deserialize(DBObject obj) {
+
+        RegisterSet registerSet = new RegisterSet();
+
+        BasicDBList registers = (BasicDBList) obj.get("registers");
+
+        for (Object sRegister : registers) {
+
+            Register register = new Register((String) ((DBObject) sRegister).get("name"));
+            register.setValue((int) ((DBObject) sRegister).get("value"));
+
+            registerSet.registers.put((int) ((DBObject) sRegister).get("index"), register);
+
+        }
+
+        return registerSet;
     }
 
     public static RegisterSet deserialize(JSONObject json) {
 
         RegisterSet registerSet = new RegisterSet();
 
-        JSONArray registers = (JSONArray)json.get("registers");
+        JSONArray registers = (JSONArray) json.get("registers");
 
-        for(JSONObject jsonRegister : (ArrayList<JSONObject>)registers){
+        for (JSONObject jsonRegister : (ArrayList<JSONObject>) registers) {
 
-            Register register = new Register((String)jsonRegister.get("name"));
-            register.setValue((int)(long)jsonRegister.get("value"));
+            Register register = new Register((String) jsonRegister.get("name"));
+            register.setValue((int) (long) jsonRegister.get("value"));
 
-            registerSet.registers.put((int)(long)jsonRegister.get("index"), register);
+            registerSet.registers.put((int) (long) jsonRegister.get("index"), register);
 
         }
 
@@ -182,7 +203,7 @@ public class RegisterSet implements Target, JSONSerialisable {
     public String toString() {
         String str = "";
 
-        for(Integer index: registers.keySet()){
+        for (Integer index : registers.keySet()) {
             str += index + " " + registers.get(index).getName() + "=" + Util.toHex(registers.get(index).getValue()) + "\n";
         }
 

Server/src/main/java/net/simon987/server/assembly/Section.java

@@ -3,10 +3,9 @@ package net.simon987.server.assembly;
 /**
  * Section of a user-created program.
  * The execution will start at the beginning of the code
- * segment and a warning message will be displayed when execution
- * reached the data segment during debugging
+ * segment.
  */
-public enum Segment {
+public enum Section {
 
     /**
      * Code section of the program. Contains executable code

Server/src/main/java/net/simon987/server/assembly/Status.java

@@ -132,4 +132,20 @@ public class Status {
     public void setErrorFlag(boolean errorFlag) {
         this.errorFlag = errorFlag;
     }
+
+    public char toByte() {
+        char stat = 0; 
+        stat = (char) (stat | ((signFlag ? 1 : 0) << 3));
+        stat = (char) (stat | ((zeroFlag ? 1 : 0) << 2));
+        stat = (char) (stat | ((carryFlag ? 1 : 0) << 1));
+        stat = (char) (stat | (overflowFlag ? 1 : 0));
+        return stat;
+    }
+    
+    public void fromByte(char stat) {
+        setSignFlag((stat & (1 << 3)) != 0);
+        setZeroFlag((stat & (1 << 2)) != 0);
+        setCarryFlag((stat & (1 << 1)) != 0);
+        setOverflowFlag((stat & 1) != 0);    	
+    }
 }

Server/src/main/java/net/simon987/server/assembly/Util.java

@@ -41,8 +41,8 @@ public class Util {
         return s & 0x0000FFFF;
     }
 
-    public static String toHex(int a){
-        return String.format("%04X ", uShort(a));
+    public static String toHex(int a) {
+        return String.format("%04X ", a);
     }
 
     public static String toHex(byte[] byteArray) {

Server/src/main/java/net/simon987/server/assembly/exception/DuplicateSectionException.java

@@ -3,17 +3,17 @@ package net.simon987.server.assembly.exception;
 /**
  * Threw when a user attempts to define the same section twice
  */
-public class DuplicateSegmentException extends AssemblyException {
+public class DuplicateSectionException extends AssemblyException {
 
     /**
      * Message of the exception
      */
-    private static final String message = "Segments can only be defined once";
+    private static final String message = "Sections can only be defined once";
 
     /**
-     * Create a new Duplicate Segment Exception
+     * Create a new Duplicate Section Exception
      */
-    public DuplicateSegmentException(int line) {
+    public DuplicateSectionException(int line) {
         super(message, line);
     }
 }

Server/src/main/java/net/simon987/server/assembly/exception/FatalAssemblyException.java

@@ -0,0 +1,20 @@
+package net.simon987.server.assembly.exception;
+
+/**
+ * Class of exceptions that should stop assembly immediatly 
+ */
+public class FatalAssemblyException extends AssemblyException {
+
+    /**
+     * Message of the exception
+     */
+    private static final String message = "A fatal assembly error has occurred";
+
+    /**
+     * Create a new Duplicate Section Exception
+     */
+    public FatalAssemblyException(String msg, int line) {
+        super(msg, line);
+    }
+}
+

Server/src/main/java/net/simon987/server/assembly/exception/OffsetOverflowException.java

@@ -0,0 +1,19 @@
+package net.simon987.server.assembly.exception;
+
+/**
+ * Threw when offset for stored instruction/data overflows the size of memory
+ */
+public class OffsetOverflowException extends FatalAssemblyException {
+
+    /**
+     * Message of the exception
+     */
+    private static final String message = "Program data exceeds memory size ";
+
+    /**
+     * Create a new Offset Overflow Exception
+     */
+    public OffsetOverflowException(int offset, int memsiz, int line) {
+        super(message + offset + " > " + memsiz, line);
+    }
+}

Server/src/main/java/net/simon987/server/assembly/instruction/AddInstruction.java

@@ -8,8 +8,8 @@ import net.simon987.server.assembly.Util;
 /**
  * Add two numbers together, the result is stored in the destination operand
  * <p>
- *     ADD A, B
- *     A = A + B
+ * ADD A, B
+ * A = A + B
  * </p>
  */
 public class AddInstruction extends Instruction {
@@ -39,8 +39,8 @@ public class AddInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
         return add(a, b, status, dst, dstIndex);
     }
@@ -48,8 +48,8 @@ public class AddInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
         return add(a, b, status, dst, dstIndex);
     }

Server/src/main/java/net/simon987/server/assembly/instruction/AndInstruction.java

@@ -8,8 +8,8 @@ import net.simon987.server.assembly.Util;
 /**
  * AND two numbers together, the result is stored in the destination operand
  * <p>
- *     AND A, B
- *     A = A & B
+ * AND A, B
+ * A = A & B
  * </p>
  * FLAGS: OF=0 S=* Z=* X=0
  */
@@ -27,8 +27,8 @@ public class AndInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
-        int a =(char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
 
         int result = (a & b);
@@ -45,8 +45,8 @@ public class AndInstruction extends Instruction {
 
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
 
         int result = (a & b);

Server/src/main/java/net/simon987/server/assembly/instruction/BrkInstruction.java

@@ -20,4 +20,8 @@ public class BrkInstruction extends Instruction {
 
         return status;
     }
+
+    public boolean noOperandsValid() {
+        return true;
+    }
 }

Server/src/main/java/net/simon987/server/assembly/instruction/CmpInstruction.java

@@ -23,15 +23,15 @@ public class CmpInstruction extends Instruction {
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
 
         int result = a - b;
 
         status.setSignFlag(Util.checkSign16(result));
         status.setZeroFlag((char) result == 0);
-        status.setOverflowFlag(Util.checkOverFlowAdd16(a, b));
+        status.setOverflowFlag(Util.checkOverFlowSub16(a, b));
         status.setCarryFlag(Util.checkCarry16(result));
 
         return status;
@@ -40,8 +40,8 @@ public class CmpInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
         int result = a - b;