apply room post id hax for message deletion

* make application of room post id workarround a utils function
* apply room post id workaround for deleted message ids too

Author: majestrate

sogs/model.py

@@ -572,6 +572,7 @@ def add_post_to_room(user_id, room_id, data, sig, rate_limit_size=5, rate_limit_
 
 
 def get_deletions_deprecated(room_id, since):
+    since = utils.maybe_apply_post_id_hax(room_id, since)
     if since:
         result = db.conn.execute(
             """
@@ -590,20 +591,14 @@ def get_deletions_deprecated(room_id, since):
             """,
             [room_id],
         )
-    return [{'deleted_message_id': row[0], 'id': row[1]} for row in result]
+    return [{'deleted_message_id': int(row[0]), 'id': int(row[1])} for row in result]
 
 
 def get_message_deprecated(room_id, since, limit=256):
     msgs = list()
     result = None
+    since = utils.maybe_apply_post_id_hax(room_id, since)
     if since:
-        # Handle id mapping from an old database import in case the client is requesting
-        # messages since some id from the old db.
-        if db.ROOM_IMPORT_HACKS and room_id in db.ROOM_IMPORT_HACKS:
-            (max_old_id, offset) = db.ROOM_IMPORT_HACKS[room_id]
-            if since <= max_old_id:
-                since += offset
-
         result = db.conn.execute(
             """
             SELECT * FROM message_details

sogs/utils.py

@@ -61,6 +61,15 @@ def server_url(room):
     return '{}/{}?public_key={}'.format(config.URL_BASE, room or '', crypto.server_pubkey_hex)
 
 
+def maybe_apply_post_id_hax(room_id, since):
+    """Handle id mapping from an old database import in case the client is requesting messages since some id from the old db."""
+    if since and db.ROOM_IMPORT_HACKS and room_id in db.ROOM_IMPORT_HACKS:
+        (max_old_id, offset) = db.ROOM_IMPORT_HACKS[room_id]
+        if since <= max_old_id:
+            since += offset
+    return since
+
+
 SIGNATURE_SIZE = 64
 SESSION_ID_SIZE = 33
 # Size returned by make_legacy_token (assuming it is given a standard 66-hex (33 byte) session id):