gateway.websocket: cast user_ids to List[Union[int, Any]]

this finishes the implementation, as before it was simply List[Any]
(List[str] on well-formed requests), which means Any was always being
passed to get_member_multi, which only works with ints.

docs/differences.md

@@ -0,0 +1,16 @@
+# API Differences
+
+## Request Guild Members
+
+### In regards to ID serialization
+
+Request Guild Members does not follow the same logic Discord does when
+invalid IDs are given on the `user_ids` field.
+
+Instead of returning them as non-string numbers, **they're returned as-is.**
+
+This should not cause any problems to well-formed requests.
+
+### Assumptions on business logic
+
+When using `user_ids`, Litecord will ignore the given `query` in the payload.

litecord/gateway/websocket.py

@@ -32,7 +32,7 @@ from litecord.auth import raw_token_check
 from litecord.enums import RelationshipType, ChannelType
 from litecord.schemas import validate, GW_STATUS_UPDATE
 from litecord.utils import (
-    task_wrapper, yield_chunks
+    task_wrapper, yield_chunks, maybe_int
 )
 from litecord.permissions import get_permissions
 
@@ -770,11 +770,12 @@ class GatewayWebsocket:
         if not exists:
             return
 
-        # limit user_ids to 1000 possible members
-        user_ids = user_ids[:1000]
+        # limit user_ids to 1000 possible members, and try your best
+        # to convert them to ints, giving the same user id if it fails.
+        # this is checked later on to fill the not_found array
+        user_ids = [maybe_int(uid) for uid in user_ids[:1000]]
 
-        # assumption: requesting user_ids means
-        # we don't do query.
+        # ASSUMPTION: requesting user_ids means we don't do query.
         if user_ids:
             members = await self.storage.get_member_multi(guild_id, user_ids)
             mids = [m['user']['id'] for m in members]

litecord/utils.py

@@ -19,7 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import asyncio
 import json
-from typing import Any, Iterable, Optional, Sequence, List, Dict
+from typing import Any, Iterable, Optional, Sequence, List, Dict, Union
 
 from logbook import Logger
 from quart.json import JSONEncoder
@@ -214,3 +214,12 @@ async def search_result_from_list(rows: List) -> Dict[str, Any]:
         'messages': res,
         'analytics_id': '',
     }
+
+
+def maybe_int(val: Any) -> Union[int, Any]:
+    """Try to convert a given value to an integer. Returns the same value
+    if it is not."""
+    try:
+        return int(val)
+    except (ValueError, TypeError):
+        return val