Initial implementation completion and refactor (#6806)

webclient/src/websocket/commands/admin/updateServerMessage.ts

@@ -1,26 +1,10 @@
-import webClient from '../../WebClient';
+import { BackendService } from '../../services/BackendService';
 import { AdminPersistence } from '../../persistence';
 
 export function updateServerMessage(): void {
-  const command = webClient.protobuf.controller.Command_UpdateServerMessage.create();
-  const sc = webClient.protobuf.controller.AdminCommand.create({ '.Command_UpdateServerMessage.ext': command });
-
-  webClient.protobuf.sendAdminCommand(sc, (raw) => {
-    const { responseCode } = raw;
-
-    let error: string;
-
-    switch (responseCode) {
-      case webClient.protobuf.controller.Response.ResponseCode.RespOk:
-        AdminPersistence.updateServerMessage();
-        return;
-      default:
-        error = 'Failed to update server message.';
-        break;
-    }
-
-    if (error) {
-      console.error(responseCode, error);
-    }
+  BackendService.sendAdminCommand('Command_UpdateServerMessage', {}, {
+    onSuccess: () => {
+      AdminPersistence.updateServerMessage();
+    },
   });
 }