[ACA-3358] Show user friendly error templates when there are no applications/processDefinitions (#5746)

* * Added empty template on start process component

* * Removed errorMessageId

* * Added unit tests to recent changes

* * Added doc

* * fixed comments

* * Used showError notification

* * After rebase

* * Fixed failing e2e

* * Fixed comments

demo-shell/src/app/components/process-service/process-service.component.html

@@ -224,7 +224,8 @@
                         [name]="defaultProcessName"
                         (formContentClicked)="onContentClick($event)"
                         (start)="onStartProcessInstance($event)"
-                        (cancel)="onCancelProcessInstance()">
+                        (cancel)="onCancelProcessInstance()"
+                        (error)="onStartProcessError($event)">
                     </adf-start-process>
                 </div>
             </div>

demo-shell/src/app/components/process-service/process-service.component.ts

@@ -36,7 +36,7 @@ import {
 import {
     FORM_FIELD_VALIDATORS, FormRenderingService, FormService,
     DynamicTableRow, ValidateDynamicTableRowEvent, AppConfigService, PaginationComponent, UserPreferenceValues,
-    AlfrescoApiService, UserPreferencesService, LogService, DataCellEvent
+    AlfrescoApiService, UserPreferencesService, LogService, DataCellEvent, NotificationService
 } from '@alfresco/adf-core';
 
 import { AnalyticsReportListComponent } from '@alfresco/adf-insights';
@@ -174,6 +174,7 @@ export class ProcessServiceComponent implements AfterViewInit, OnDestroy, OnInit
                 formRenderingService: FormRenderingService,
                 formService: FormService,
                 private location: Location,
+                private notificationService: NotificationService,
                 private preferenceService: UserPreferencesService) {
 
         this.defaultProcessName = this.appConfig.get<string>('adf-start-process.name');
@@ -403,6 +404,10 @@ export class ProcessServiceComponent implements AfterViewInit, OnDestroy, OnInit
         this.reloadProcessFilters();
     }
 
+    onStartProcessError(event: any) {
+        this.notificationService.showError(event.message);
+    }
+
     isStartProcessMode(): boolean {
         return this.currentProcessInstanceId === currentProcessIdNew;
     }