Refactor delete room (#9032)

Part of #9032
As there is two different endpoints with two differents method,
an intermediate function avoid the code duplication.
This function should be removed when the deprecated API is removed.

Signed-off-by: Thibault Ferrante <thibault.ferrante@pm.me>

synapse/rest/admin/rooms.py

@@ -37,9 +37,11 @@
 from synapse.util import json_decoder
 
 if TYPE_CHECKING:
+    from synapse.api.auth import Auth
+    from synapse.handlers.pagination import PaginationHandler
+    from synapse.handlers.room import RoomShutdownHandler
     from synapse.server import HomeServer
 
-
 logger = logging.getLogger(__name__)
 
 
@@ -146,50 +148,14 @@ def __init__(self, hs: "HomeServer"):
     async def on_POST(
         self, request: SynapseRequest, room_id: str
     ) -> Tuple[int, JsonDict]:
-        requester = await self.auth.get_user_by_req(request)
-        await assert_user_is_admin(self.auth, requester.user)
-
-        content = parse_json_object_from_request(request)
-
-        block = content.get("block", False)
-        if not isinstance(block, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'block' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        purge = content.get("purge", True)
-        if not isinstance(purge, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'purge' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        force_purge = content.get("force_purge", False)
-        if not isinstance(force_purge, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'force_purge' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        ret = await self.room_shutdown_handler.shutdown_room(
-            room_id=room_id,
-            new_room_user_id=content.get("new_room_user_id"),
-            new_room_name=content.get("room_name"),
-            message=content.get("message"),
-            requester_user_id=requester.user.to_string(),
-            block=block,
+        return await _delete_room(
+            request,
+            room_id,
+            self.auth,
+            self.room_shutdown_handler,
+            self.pagination_handler,
         )
 
-        # Purge room
-        if purge:
-            await self.pagination_handler.purge_room(room_id, force=force_purge)
-
-        return (200, ret)
-
 
 class ListRoomRestServlet(RestServlet):
     """
@@ -328,50 +294,14 @@ async def on_GET(
     async def on_DELETE(
         self, request: SynapseRequest, room_id: str
     ) -> Tuple[int, JsonDict]:
-        requester = await self.auth.get_user_by_req(request)
-        await assert_user_is_admin(self.auth, requester.user)
-
-        content = parse_json_object_from_request(request)
-
-        block = content.get("block", False)
-        if not isinstance(block, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'block' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        purge = content.get("purge", True)
-        if not isinstance(purge, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'purge' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        force_purge = content.get("force_purge", False)
-        if not isinstance(force_purge, bool):
-            raise SynapseError(
-                HTTPStatus.BAD_REQUEST,
-                "Param 'force_purge' must be a boolean, if given",
-                Codes.BAD_JSON,
-            )
-
-        ret = await self.room_shutdown_handler.shutdown_room(
-            room_id=room_id,
-            new_room_user_id=content.get("new_room_user_id"),
-            new_room_name=content.get("room_name"),
-            message=content.get("message"),
-            requester_user_id=requester.user.to_string(),
-            block=block,
+        return await _delete_room(
+            request,
+            room_id,
+            self.auth,
+            self.room_shutdown_handler,
+            self.pagination_handler,
         )
 
-        # Purge room
-        if purge:
-            await self.pagination_handler.purge_room(room_id, force=force_purge)
-
-        return (200, ret)
-
 
 class RoomMembersRestServlet(RestServlet):
     """
@@ -758,3 +688,55 @@ async def on_GET(
         )
 
         return 200, results
+
+
+async def _delete_room(
+    request: SynapseRequest,
+    room_id: str,
+    auth: "Auth",
+    room_shutdown_handler: "RoomShutdownHandler",
+    pagination_handler: "PaginationHandler",
+) -> Tuple[int, JsonDict]:
+    requester = await auth.get_user_by_req(request)
+    await assert_user_is_admin(auth, requester.user)
+
+    content = parse_json_object_from_request(request)
+
+    block = content.get("block", False)
+    if not isinstance(block, bool):
+        raise SynapseError(
+            HTTPStatus.BAD_REQUEST,
+            "Param 'block' must be a boolean, if given",
+            Codes.BAD_JSON,
+        )
+
+    purge = content.get("purge", True)
+    if not isinstance(purge, bool):
+        raise SynapseError(
+            HTTPStatus.BAD_REQUEST,
+            "Param 'purge' must be a boolean, if given",
+            Codes.BAD_JSON,
+        )
+
+    force_purge = content.get("force_purge", False)
+    if not isinstance(force_purge, bool):
+        raise SynapseError(
+            HTTPStatus.BAD_REQUEST,
+            "Param 'force_purge' must be a boolean, if given",
+            Codes.BAD_JSON,
+        )
+
+    ret = await room_shutdown_handler.shutdown_room(
+        room_id=room_id,
+        new_room_user_id=content.get("new_room_user_id"),
+        new_room_name=content.get("room_name"),
+        message=content.get("message"),
+        requester_user_id=requester.user.to_string(),
+        block=block,
+    )
+
+    # Purge room
+    if purge:
+        await pagination_handler.purge_room(room_id, force=force_purge)
+
+    return (200, ret)