task verification (not 100% tested)

test/schema.sql

@@ -1,5 +1,5 @@
 DROP TABLE IF EXISTS worker_identity, worker, project, task, log_entry,
-  worker_has_access_to_project, manager, manager_has_role_on_project;
+  worker_has_access_to_project, manager, manager_has_role_on_project, project_monitoring, worker_verifies_task;
 DROP TYPE IF EXISTS status;
 DROP TYPE IF EXISTS log_level;
 
@@ -23,14 +23,15 @@ CREATE TABLE worker
 
 CREATE TABLE project
 (
-  id        SERIAL PRIMARY KEY,
-  priority  INTEGER DEFAULT 0,
-  name      TEXT UNIQUE,
-  clone_url TEXT,
-  git_repo  TEXT UNIQUE,
-  version   TEXT,
-  motd      TEXT,
-  public    boolean
+  id                SERIAL PRIMARY KEY,
+  priority          INTEGER DEFAULT 0,
+  name              TEXT UNIQUE,
+  clone_url         TEXT,
+  git_repo          TEXT UNIQUE,
+  version           TEXT,
+  motd              TEXT,
+  public            boolean,
+  closed_task_count INT     DEFAULT 0
 );
 
 CREATE TABLE worker_has_access_to_project
@@ -42,17 +43,25 @@ CREATE TABLE worker_has_access_to_project
 
 CREATE TABLE task
 (
-  hash64          BIGINT   DEFAULT NULL UNIQUE,
-  id              SERIAL PRIMARY KEY,
-  project         INTEGER REFERENCES project (id),
-  assignee        INTEGER REFERENCES worker (id),
-  max_assign_time INTEGER  DEFAULT 0,
-  assign_time     INTEGER  DEFAULT 0,
-  priority        SMALLINT DEFAULT 0,
-  retries         SMALLINT DEFAULT 0,
-  max_retries     SMALLINT,
-  status          SMALLINT DEFAULT 1,
-  recipe          TEXT
+  hash64             BIGINT   DEFAULT NULL UNIQUE,
+  id                 SERIAL PRIMARY KEY,
+  project            INTEGER REFERENCES project (id),
+  assignee           INTEGER REFERENCES worker (id),
+  max_assign_time    INTEGER  DEFAULT 0,
+  assign_time        INTEGER  DEFAULT 0,
+  verification_count INTEGER  DEFAULT 0,
+  priority           SMALLINT DEFAULT 0,
+  retries            SMALLINT DEFAULT 0,
+  max_retries        SMALLINT,
+  status             SMALLINT DEFAULT 1,
+  recipe             TEXT
+);
+
+CREATE TABLE worker_verifies_task
+(
+  verification_hash BIGINT,
+  task              BIGINT REFERENCES task (id) ON DELETE CASCADE,
+  worker            INT REFERENCES worker (id)
 );
 
 CREATE TABLE log_entry
@@ -76,4 +85,25 @@ CREATE TABLE manager_has_role_on_project
   manager INTEGER REFERENCES manager (id),
   role    SMALLINT,
   project INTEGER REFERENCES project (id)
-);
+);
+
+CREATE TABLE project_monitoring
+(
+  project           INT REFERENCES project (id),
+  new_task_count    INT,
+  failed_task_count INT,
+  closed_task_count INT
+);
+
+CREATE OR REPLACE FUNCTION on_task_delete_proc() RETURNS TRIGGER AS
+$$
+BEGIN
+  UPDATE project SET closed_task_count=closed_task_count + 1 WHERE id = OLD.project;
+  RETURN OLD;
+END;
+$$ LANGUAGE 'plpgsql';
+CREATE TRIGGER on_task_delete
+  BEFORE DELETE
+  ON task
+  FOR EACH ROW
+EXECUTE PROCEDURE on_task_delete_proc();