Add Message.pinned_at and fix Message.pins

Author: Soheab

discord/abc.py

@@ -1710,7 +1710,7 @@ async def fetch_message(self, id: int, /) -> Message:
         data = await self._state.http.get_message(channel.id, id)
         return self._state.create_message(channel=channel, data=data)
 
-    async def pins(self, *, before: Optional[SnowflakeTime] = None, limit: Optional[int] = None) -> List[Message]:
+    async def pins(self, *, before: Optional[datetime] = None, limit: Optional[int] = None) -> List[Message]:
         """|coro|
 
         Retrieves a maximum of 50 pinned messages from the destination.
@@ -1728,8 +1728,8 @@ async def pins(self, *, before: Optional[SnowflakeTime] = None, limit: Optional[
 
         Parameters
         -----------
-        before: Optional[Union[:class:`~discord.abc.Snowflake`, :class:`datetime.datetime`]]
-            Retrieve pinned messages before this date or message.
+        before: Optional[:class:`datetime.datetime`]
+            Retrieve pinned messages before this time.
             If a datetime is provided, it is recommended to use a UTC aware datetime.
             If the datetime is naive, it is assumed to be local time.
         limit: Optional[int]
@@ -1749,13 +1749,17 @@ async def pins(self, *, before: Optional[SnowflakeTime] = None, limit: Optional[
         List[:class:`~discord.Message`]
             The messages that are currently pinned.
         """
-        if isinstance(before, datetime):
-            before = Object(id=utils.time_snowflake(before, high=False))
+        state = self._state
+        if before is not None:
+            if not isinstance(before, datetime):
+                raise TypeError(f'before must be a datetime object, not {before.__class__!r}')
+            if before.tzinfo is None:
+                raise TypeError(
+                    'before must be an aware datetime. Consider using discord.utils.utcnow() or datetime.datetime.now().astimezone() for local time.'
+                )
 
         channel = await self._get_channel()
-        state = self._state
-        data = await state.http.pins_from(channel.id, before=before.id if before else None, limit=limit)
-        return [state.create_message(channel=channel, data=m["message"]) for m in data["items"]]
+        data = await state.http.pins_from(channel.id, before=before.isoformat() if before else None, limit=limit)
 
     async def history(
         self,

discord/http.py

@@ -1054,7 +1054,7 @@ def unpin_message(self, channel_id: Snowflake, message_id: Snowflake, reason: Op
     def pins_from(
         self,
         channel_id: Snowflake,
-        before: Optional[Snowflake] = None,
+        before: Optional[str] = None,
         limit: Optional[int] = None,
     ) -> Response[message.ChannelPins]:
         params = {}

discord/message.py

@@ -2171,6 +2171,7 @@ class Message(PartialMessage, Hashable):
         'call',
         'purchase_notification',
         'message_snapshots',
+        '_pinned_at',
     )
 
     if TYPE_CHECKING:
@@ -2210,6 +2211,8 @@ def __init__(
         self.application_id: Optional[int] = utils._get_as_snowflake(data, 'application_id')
         self.stickers: List[StickerItem] = [StickerItem(data=d, state=state) for d in data.get('sticker_items', [])]
         self.message_snapshots: List[MessageSnapshot] = MessageSnapshot._from_value(state, data.get('message_snapshots'))
+        # Set by Messageable.pins
+        self._pinned_at: Optional[datetime.datetime] = None
 
         self.poll: Optional[Poll] = None
         try:
@@ -2629,6 +2632,18 @@ def thread(self) -> Optional[Thread]:
         if self.guild is not None:
             # Fall back to guild threads in case one was created after the message
             return self._thread or self.guild.get_thread(self.id)
+        
+    @property
+    def pinned_at(self) -> Optional[datetime.datetime]:
+        """Optional[:class:`datetime.datetime`]: An aware UTC datetime object containing the time 
+        when the message was pinned.
+
+        .. note::
+            This is only set for messages that are returned by :meth:`Messageable.pins`.
+
+        .. versionadded:: 2.6
+        """
+        return self._pinned_at
 
     @property
     @deprecated('interaction_metadata')