fix(tempvoice): add permission overwrites for temporary voice channel owners

tempvoice.py

@@ -57,6 +57,9 @@ class TempVoice(commands.Cog):
         name = name.strip(" .")
         if not name:
             name = "user-{}".format(fallback_id)
+
+        # Prefix generated channel names for clearer voice-channel context.
+        name = "🔊 {}".format(name)
         return name[:32]
 
     @staticmethod
@@ -476,10 +479,18 @@ class TempVoice(commands.Cog):
             await self._remove_mapping_by_owner(guild, member.id)
 
         channel_name = self._safe_voice_name(member.display_name or member.name, member.id)
+        owner_overwrite = discord.PermissionOverwrite(
+            view_channel=True,
+            manage_channels=True,
+            connect=True,
+            speak=True,
+            stream=True,
+        )
         try:
             new_channel = await guild.create_voice_channel(
                 name=channel_name,
                 category=target_category,
+                overwrites={member: owner_overwrite},
                 reason="TempVoice: create temporary voice for {} ({})".format(member, member.id),
             )
         except discord.Forbidden:
@@ -524,7 +535,12 @@ class TempVoice(commands.Cog):
 
         await self._send_creation_message(member, new_channel)
 
-    async def _delete_temp_channel_if_empty(self, channel: discord.abc.GuildChannel) -> None:
+    async def _delete_temp_channel_if_empty(
+        self,
+        channel: discord.abc.GuildChannel,
+        retries: int = 1,
+        retry_delay: float = 0.75,
+    ) -> None:
         if not isinstance(channel, discord.VoiceChannel):
             return
 
@@ -532,27 +548,37 @@ class TempVoice(commands.Cog):
         if owner_id is None:
             return
 
-        if channel.members:
+        for attempt in range(retries + 1):
+            refreshed_channel = channel.guild.get_channel(channel.id)
+            if not isinstance(refreshed_channel, discord.VoiceChannel):
+                await self._remove_channel_mappings_bulk(channel.guild, {channel.id})
+                return
+
+            if refreshed_channel.members:
+                if attempt < retries:
+                    await asyncio.sleep(retry_delay)
+                    continue
                 return
 
             try:
-            await channel.delete(reason="TempVoice: deleting empty temporary channel")
+                await refreshed_channel.delete(reason="TempVoice: deleting empty temporary channel")
             except discord.NotFound:
-            await self._remove_channel_mappings_bulk(channel.guild, {channel.id})
+                await self._remove_channel_mappings_bulk(channel.guild, {refreshed_channel.id})
             except discord.Forbidden:
                 log.warning(
                     "Missing permissions to delete temporary channel %s (%s).",
-                channel,
+                    refreshed_channel,
-                channel.id,
+                    refreshed_channel.id,
                 )
             except discord.HTTPException:
                 log.exception(
                     "HTTP error while deleting temporary channel %s (%s).",
-                channel,
+                    refreshed_channel,
-                channel.id,
+                    refreshed_channel.id,
                 )
             else:
-            await self._remove_channel_mappings_bulk(channel.guild, {channel.id})
+                await self._remove_channel_mappings_bulk(channel.guild, {refreshed_channel.id})
+            return
 
     async def _setlimit_impl(self, ctx: commands.Context, limit: int) -> None:
         await self._set_locale_context(ctx.guild)
@@ -641,7 +667,7 @@ class TempVoice(commands.Cog):
                         await self._handle_join_to_create(member, target_category_id)
 
             if before.channel is not None:
-                await self._delete_temp_channel_if_empty(before.channel)
+                await self._delete_temp_channel_if_empty(before.channel, retries=2, retry_delay=0.75)
         except Exception:
             log.exception(
                 "Unexpected exception in on_voice_state_update for member %s (%s).",