[ADF-2494] Task Standalone - Provide a way to attach a form (#3459)

* button added for task standalone

* attach form component added

* slide-toggle position fixed

* tests added

* rebase fixed

* review fix

* test added & fixes

* tests fixes

* refresh task details

* tests fixed

* attachFormToATask test added

* formPreview test fixed

* adf-form test fixed

lib/process-services/task-list/components/task-standalone.component.ts

@@ -28,7 +28,11 @@ export class TaskStandaloneComponent {
 
     /** Name of the task. */
     @Input()
-    taskName: string;
+    taskName;
+
+    /** Id of the task. */
+    @Input()
+    taskId;
 
     /** If true then Task completed message is shown and `Complete` and `Cancel` buttons are hidden. */
     @Input()
@@ -50,6 +54,11 @@ export class TaskStandaloneComponent {
     @Output()
     complete: EventEmitter<void> = new EventEmitter<void>();
 
+    @Output()
+    formAttached: EventEmitter<void> = new EventEmitter<void>();
+
+    showAttachForm: boolean = false;
+
     constructor() { }
 
     onCancelButtonClick(): void {
@@ -67,4 +76,21 @@ export class TaskStandaloneComponent {
     hasCancelButton(): boolean {
         return !this.hideCancelButton && !this.isCompleted;
     }
+
+    hasAttachFormButton(): boolean {
+        return !this.isCompleted;
+    }
+
+    onShowAttachForm() {
+        this.showAttachForm = true;
+    }
+
+    onCancelAttachForm() {
+        this.showAttachForm = false;
+    }
+
+    onCompleteAttachForm() {
+        this.showAttachForm = false;
+        this.formAttached.emit();
+    }
 }