User name display

If there is a display name, it will be used in all views (task lists,
task details, comments).

Made a view for task lists, because it was cleaner and because they're
all more or less the same anyway.

database/tasks-functions.sql

@@ -76,3 +76,36 @@ EXCEPTION
 		RETURN 2;
 END;
 $update_task$ LANGUAGE plpgsql;
+
+
+
+--
+-- Task list view
+--
+-- This view contains all fields used to display task lists.
+--
+
+DROP VIEW IF EXISTS tasks_list;
+CREATE VIEW tasks_list
+	AS SELECT t.task_id AS id, t.item_id AS item, t.task_title AS title,
+			t.task_description AS description, t.task_added AS added_at,
+			u1.user_view_name AS added_by,
+			ct.completed_task_time AS completed_at,
+			u2.user_view_name AS completed_by ,
+			t.task_priority AS priority ,
+			bd.bad_deps AS missing_dependencies
+		FROM tasks t
+			INNER JOIN users_view u1 ON u1.user_id = t.user_id
+			LEFT OUTER JOIN completed_tasks ct ON ct.task_id = t.task_id
+			LEFT OUTER JOIN users_view u2 ON u2.user_id = ct.user_id
+			LEFT OUTER JOIN (
+				SELECT td.task_id , COUNT(*) AS bad_deps
+					FROM task_dependencies td
+						LEFT OUTER JOIN completed_tasks dct
+							ON dct.task_id = td.task_id_depends
+					WHERE dct.task_id IS NULL
+					GROUP BY td.task_id
+				) AS bd ON bd.task_id = t.task_id;
+
+GRANT SELECT ON tasks_list TO :webapp_user;
+

database/users-functions.sql

@@ -23,3 +23,21 @@ $users_add$;
 
 REVOKE EXECUTE ON FUNCTION users_add( TEXT , TEXT , INT , TEXT , TEXT ) FROM PUBLIC;
 GRANT EXECUTE ON FUNCTION users_add( TEXT , TEXT , INT , TEXT , TEXT) TO :webapp_user;
+
+
+
+--
+-- View that lists users and adds the string to use when displaying
+--
+
+DROP VIEW IF EXISTS users_view;
+CREATE VIEW users_view
+	AS SELECT * , ( CASE
+			WHEN user_display_name IS NULL THEN
+				user_email
+			ELSE
+				user_display_name
+			END ) AS user_view_name
+		FROM users;
+
+GRANT SELECT ON users_view TO :webapp_user;