add motd schema and motd editor

app/models.py

@@ -394,3 +394,19 @@ class BookmarkedThreads(Model):
 
     def get_thread(self):
         return Threads.find({'id': self.thread_id})
+
+
+class MOTD(Model):
+    table = 'motd'
+
+    @classmethod
+    def has_motd(cls):
+        q = 'SELECT EXISTS(SELECT 1 FROM motd) as e'
+        res = db.fetch_one(q)['e']
+        return int(res) == 1
+
+    @classmethod
+    def get_all(cls):
+        q = 'SELECT id FROM motd'
+        res = db.query(q)
+        return [MOTD.find({'id': i['id']}) for i in res]