Take into consideration member timeouts in permission calculations

discord/abc.py

@@ -538,6 +538,7 @@ class GuildChannel:
         - Guild roles
         - Channel overrides
         - Member overrides
+        - Member timeout
 
         If a :class:`~discord.Role` is passed, then it checks the permissions
         someone with that role would have, which is essentially:
@@ -624,6 +625,12 @@ class GuildChannel:
         if base.administrator:
             return Permissions.all()
 
+        if obj.is_timed_out():
+            # Timeout leads to every permission except VIEW_CHANNEL and READ_MESSAGE_HISTORY
+            # being explicitly denied
+            base.value &= Permissions._timeout_mask()
+            return base
+
         # Apply @everyone allow/deny first since it's special
         try:
             maybe_everyone = self._overwrites[0]

discord/member.py

@@ -649,8 +649,11 @@ class Member(discord.abc.Messageable, _UserTag):
         channel permission overwrites. For 100% accurate permission
         calculation, please use :meth:`abc.GuildChannel.permissions_for`.
 
-        This does take into consideration guild ownership and the
+        This does take into consideration guild ownership, the
-        administrator implication.
+        administrator implication, and whether the member is timed out.
+
+        .. versionchanged:: 2.0
+            Member timeouts are taken into consideration.
         """
 
         if self.guild.owner_id == self.id:
@@ -663,6 +666,9 @@ class Member(discord.abc.Messageable, _UserTag):
         if base.administrator:
             return Permissions.all()
 
+        if self.is_timed_out():
+            base.value &= Permissions._timeout_mask()
+
         return base
 
     @property

discord/permissions.py

@@ -151,6 +151,13 @@ class Permissions(BaseFlags):
         """
         return cls(0b11111111111111111111111111111111111111111)
 
+    @classmethod
+    def _timeout_mask(cls) -> int:
+        p = cls.all()
+        p.view_channel = False
+        p.read_message_history = False
+        return ~p.value
+
     @classmethod
     def all_channel(cls) -> Self:
         """A :class:`Permissions` with all channel-specific permissions set to