add channel-icons icon scope handling

litecord/blueprints/icons.py

@@ -76,3 +76,9 @@ async def _get_user_avatar(user_id, avatar_file):
 # @bp.route('/app-icons/<int:application_id>/<icon_hash>.<ext>')
 async def get_app_icon(application_id, icon_hash, ext):
     pass
+
+
+@bp.route('/channel-icons/<int:channel_id>/<icon_file>', methods=['GET'])
+async def _get_gdm_icon(guild_id: int, icon_file: str):
+    icon_hash, ext = splitext_(icon_file)
+    return await send_icon('channel-icons', guild_id, icon_hash, ext=ext)

litecord/images.py

@@ -161,21 +161,18 @@ def parse_data_uri(string) -> tuple:
 def _gen_update_sql(scope: str) -> str:
     field = {
         'user': 'avatar',
-        'guild': 'icon'
+        'guild': 'icon',
+        'channel-icons': 'icon',
     }[scope]
 
     table = {
         'user': 'users',
-        'guild': 'guilds'
-    }[scope]
-
-    col = {
-        'user': 'id',
-        'guild': 'id'
+        'guild': 'guilds',
+        'channel-icons': 'group_dm_channels'
     }[scope]
 
     return f"""
-    SELECT {field} FROM {table} WHERE {col} = $1
+    SELECT {field} FROM {table} WHERE id = $1
     """