Prevent room creator from leaving

src/handlers/messages.ts

@@ -144,6 +144,24 @@ export async function handle(rcMessage: RcMessage): Promise<void> {
           )
           return
         }
+        const roomCreatorId = (
+          await axios.get(`/_synapse/admin/v1/rooms/${room_id}`)
+        ).data.creator
+        if (!roomCreatorId) {
+          log.warn(
+            `Could not determine room creator for room ${room_id}, using admin credentials.`
+          )
+        }
+
+        log.warn(
+          `Room creator ${roomCreatorId}.`
+        )
+        if (roomCreatorId == matrixUser) {
+          log.warn(
+            `Room creator left room ${room_id}, skipping to prevent being unable to rejoin.`
+          )
+          return
+        }
 
         log.http(`User ${matrixUser} leaves room ${room_id}`)
         await axios.post(