Add support for role member counts

Author: Rapptz

discord/guild.py

@@ -3872,6 +3872,39 @@ async def edit_role_positions(self, positions: Mapping[Snowflake, int], *, reaso
 
         return roles
 
+    async def role_member_counts(self) -> Dict[Union[Object, Role], int]:
+        """|coro|
+
+        Retrieves a mapping of roles to the number of members that have it.
+
+        You must have :attr:`~Permissions.manage_roles` to do this.
+
+        .. versionadded:: 2.7
+
+        Raises
+        -------
+        Forbidden
+            You do not have permissions to view the role member counts.
+        HTTPException
+            Retrieving the role member counts failed.
+
+        Returns
+        --------
+        Dict[Union[:class:`Object`, :class:`Role`], :class:`int`]
+            A mapping of roles to the number of members that have it.
+            If a role is not found in the cache, it will be represented as an :class:`Object`
+            instead of a :class:`Role`.
+        """
+        data = await self._state.http.get_role_member_counts(self.id)
+        result: Dict[Union[Object, Role], int] = {}
+        for role_id, member_count in data.items():
+            role_id = int(role_id)
+            role = self.get_role(role_id)
+            if role is None:
+                role = Object(id=role_id, type=Role)
+            result[role] = member_count
+        return result
+
     async def welcome_screen(self) -> WelcomeScreen:
         """|coro|
 

discord/http.py

@@ -1906,6 +1906,9 @@ def get_roles(self, guild_id: Snowflake) -> Response[List[role.Role]]:
     def get_role(self, guild_id: Snowflake, role_id: Snowflake) -> Response[role.Role]:
         return self.request(Route('GET', '/guilds/{guild_id}/roles/{role_id}', guild_id=guild_id, role_id=role_id))
 
+    def get_role_member_counts(self, guild_id: Snowflake) -> Response[Dict[str, int]]:
+        return self.request(Route('GET', '/guilds/{guild_id}/roles/member-counts', guild_id=guild_id))
+
     def edit_role(
         self, guild_id: Snowflake, role_id: Snowflake, *, reason: Optional[str] = None, **fields: Any
     ) -> Response[role.Role]: