2012-02-05 18:37:25 +01:00
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-- Create a new task
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CREATE OR REPLACE FUNCTION add_task( t_item INT , t_title TEXT , t_description TEXT , t_priority INT , t_user INT )
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RETURNS INT
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STRICT VOLATILE
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SECURITY INVOKER
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AS $add_task$
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BEGIN
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INSERT INTO tasks ( item_id , task_title , task_description , task_priority , user_id )
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VALUES ( t_item , t_title , t_description , t_priority , t_user );
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RETURN 0;
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EXCEPTION
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WHEN unique_violation THEN
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RETURN 1;
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WHEN foreign_key_violation THEN
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RETURN 2;
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END;
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$add_task$ LANGUAGE plpgsql;
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-- Mark a task as finished
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CREATE OR REPLACE FUNCTION finish_task( t_id INT , u_id INT , n_text TEXT )
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RETURNS INT
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STRICT VOLATILE
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SECURITY INVOKER
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AS $finish_task$
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BEGIN
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BEGIN
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INSERT INTO completed_tasks ( task_id , user_id )
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VALUES ( t_id , u_id );
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EXCEPTION
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WHEN unique_violation THEN
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RETURN 1;
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END;
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2012-02-06 16:38:11 +01:00
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UPDATE tasks SET user_id_assigned = NULL WHERE task_id = t_id;
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2012-02-05 18:37:25 +01:00
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INSERT INTO notes ( task_id , user_id , note_text )
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VALUES ( t_id , u_id , n_text );
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RETURN 0;
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END;
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$finish_task$ LANGUAGE plpgsql;
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2012-02-06 16:38:11 +01:00
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REVOKE EXECUTE ON FUNCTION finish_task( INT , INT , TEXT ) FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION finish_task( INT , INT , TEXT ) TO :webapp_user;
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2012-02-05 18:37:25 +01:00
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-- Restart a task
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CREATE OR REPLACE FUNCTION restart_task( t_id INT , u_id INT , n_text TEXT )
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RETURNS INT
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STRICT VOLATILE
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SECURITY INVOKER
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AS $restart_task$
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BEGIN
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DELETE FROM completed_tasks WHERE task_id = t_id;
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IF NOT FOUND THEN
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RETURN 1;
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END IF;
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2012-02-06 16:38:11 +01:00
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UPDATE tasks SET user_id_assigned = u_id
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WHERE task_id = t_id;
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2012-02-05 18:37:25 +01:00
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INSERT INTO notes ( task_id , user_id , note_text )
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VALUES ( t_id , u_id , n_text );
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RETURN 0;
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END;
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$restart_task$ LANGUAGE plpgsql;
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2012-02-06 16:38:11 +01:00
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REVOKE EXECUTE ON FUNCTION restart_task( INT , INT , TEXT ) FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION restart_task( INT , INT , TEXT ) TO :webapp_user;
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2012-02-05 18:37:25 +01:00
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-- Update a task
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2012-02-06 16:38:11 +01:00
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CREATE OR REPLACE FUNCTION update_task( t_id INT , p_id INT , t_title TEXT , t_description TEXT , t_priority INT , t_assignee INT )
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2012-02-05 18:37:25 +01:00
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RETURNS INT
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STRICT VOLATILE
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SECURITY INVOKER
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AS $update_task$
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BEGIN
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2012-02-06 16:38:11 +01:00
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PERFORM 1
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FROM tasks
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LEFT OUTER JOIN completed_tasks
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USING( task_id )
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WHERE task_id = t_id AND completed_task_time IS NULL
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FOR UPDATE OF tasks;
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IF NOT FOUND THEN
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RETURN 4;
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END IF;
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BEGIN
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IF t_assignee <= 0 THEN
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t_assignee := NULL;
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END IF;
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BEGIN
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UPDATE tasks SET user_id_assigned = t_assignee WHERE task_id = t_id;
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EXCEPTION
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WHEN foreign_key_violation THEN
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RAISE EXCEPTION 'bad user';
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END;
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UPDATE tasks SET item_id = p_id , task_title = t_title ,
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task_description = t_description ,
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task_priority = t_priority
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WHERE task_id = t_id;
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EXCEPTION
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WHEN unique_violation THEN
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RETURN 1;
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WHEN foreign_key_violation THEN
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RETURN 2;
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WHEN raise_exception THEN
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RETURN 3;
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END;
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2012-02-05 18:37:25 +01:00
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RETURN 0;
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END;
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$update_task$ LANGUAGE plpgsql;
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2012-02-06 08:55:33 +01:00
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2012-02-06 16:38:11 +01:00
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REVOKE EXECUTE ON FUNCTION update_task( INT , INT , TEXT , TEXT , INT , INT ) FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION update_task( INT , INT , TEXT , TEXT , INT , INT ) TO :webapp_user;
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