storage: fix bug on last_message_id

- storage: better member.roles
 - presence: cast guild_id to str

litecord/presence.py

@@ -25,7 +25,7 @@ class PresenceManager:
             presences.append({
                 'user': member['user'],
                 'roles': member['roles'],
-                'guild_id': guild_id,
+                'guild_id': str(guild_id),
 
                 # basic presence
                 'status': state.presence['status'],

litecord/storage.py

@@ -171,7 +171,7 @@ class Storage:
         return {
             'user': await self.get_user(member_id),
             'nick': row['nickname'],
-            'roles': [guild_id] + [row[0] for row in members_roles],
+            'roles': [row[0] for row in members_roles],
             'joined_at': row['joined_at'].isoformat(),
             'deaf': row['deafened'],
             'mute': row['muted'],
@@ -226,7 +226,7 @@ class Storage:
         return members
 
     async def _chan_last_message(self, channel_id: int):
-        return await self.db.fetch("""
+        return await self.db.fetchval("""
         SELECT MAX(id)
         FROM messages
         WHERE channel_id = $1