fix(appstore): handle App Store backend failures and empty RPC responses

ts_web/appstate.ts

@@ -977,9 +977,12 @@ export const fetchAppStoreTemplatesAction = appStoreStatePart.createAction(
   async (statePartArg) => {
     const request = new plugins.typedrequest.TypedRequest<any>('/typedrequest', 'getAppStoreTemplates');
     const response = await request.fire({ identity: getIdentityForRequest() });
+    if (!response?.apps) {
+      throw new Error('The App Store returned an empty template response. Please retry.');
+    }
     return {
       ...(statePartArg.getState() || { apps: [], upgradeableServices: [], upgradeOperations: [] }),
-      apps: response.apps || [],
+      apps: response.apps,
     };
   },
 );
@@ -988,9 +991,12 @@ export const fetchUpgradeableAppStoreServicesAction = appStoreStatePart.createAc
   async (statePartArg) => {
     const request = new plugins.typedrequest.TypedRequest<any>('/typedrequest', 'getUpgradeableAppStoreServices');
     const response = await request.fire({ identity: getIdentityForRequest() });
+    if (!response?.services) {
+      throw new Error('The App Store returned an empty upgradeable-services response. Please retry.');
+    }
     return {
       ...(statePartArg.getState() || { apps: [], upgradeableServices: [], upgradeOperations: [] }),
-      upgradeableServices: response.services || [],
+      upgradeableServices: response.services,
     };
   },
 );
@@ -999,9 +1005,12 @@ export const fetchAppStoreUpgradeOperationsAction = appStoreStatePart.createActi
   async (statePartArg) => {
     const request = new plugins.typedrequest.TypedRequest<any>('/typedrequest', 'getAppStoreUpgradeOperations');
     const response = await request.fire({ identity: getIdentityForRequest() });
+    if (!response?.operations) {
+      throw new Error('The App Store returned an empty upgrade-operations response. Please retry.');
+    }
     return {
       ...(statePartArg.getState() || { apps: [], upgradeableServices: [], upgradeOperations: [] }),
-      upgradeOperations: response.operations || [],
+      upgradeOperations: response.operations,
     };
   },
 );
@@ -1027,7 +1036,7 @@ export const startAppStoreServiceUpgradeAction = appStoreStatePart.createAction<
 
 export const getAppStoreConfig = async (appIdArg: string, versionArg: string) => {
   const request = new plugins.typedrequest.TypedRequest<any>('/typedrequest', 'getAppStoreConfig');
-  return await request.fire({
+  const response = await request.fire({
     identity: getIdentityForRequest(),
     appId: appIdArg,
     version: versionArg,
@@ -1035,6 +1044,10 @@ export const getAppStoreConfig = async (appIdArg: string, versionArg: string) =>
     config: plugins.interfaces.appstore.IAppStoreVersionConfig;
     appMeta: plugins.interfaces.appstore.IAppStoreAppMeta;
   };
+  if (!response?.config || !response?.appMeta) {
+    throw new Error('The App Store returned an empty config response. Please retry.');
+  }
+  return response;
 };
 
 export const getAppStoreUpgradePreview = async (serviceIdArg: string, targetVersionArg?: string) => {
@@ -1044,6 +1057,9 @@ export const getAppStoreUpgradePreview = async (serviceIdArg: string, targetVers
     serviceId: serviceIdArg,
     targetVersion: targetVersionArg,
   });
+  if (!response?.preview) {
+    throw new Error('The App Store returned an empty upgrade preview response. Please retry.');
+  }
   return response.preview as IAppStoreUpgradePreview;
 };
 
@@ -1053,5 +1069,8 @@ export const installAppStoreApp = async (installArg: plugins.interfaces.appstore
     identity: getIdentityForRequest(),
     install: installArg,
   });
+  if (!response?.service) {
+    throw new Error('The App Store returned an empty install response. Please retry.');
+  }
   return response.service as plugins.interfaces.data.IService;
 };