[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/attach-form.component.ts

@@ -0,0 +1,87 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { LogService } from '@alfresco/adf-core';
+import { Component, EventEmitter, Input, OnInit, OnChanges, Output } from '@angular/core';
+import { Form } from '../models/form.model';
+import { TaskListService } from './../services/tasklist.service';
+
+@Component({
+    selector: 'adf-attach-form',
+    templateUrl: './attach-form.component.html',
+    styleUrls: ['./attach-form.component.scss']
+})
+
+export class AttachFormComponent implements OnInit, OnChanges {
+    constructor(private taskService: TaskListService,
+                private logService: LogService) { }
+
+    /** The id of the task whose details we are asking for. */
+    @Input()
+    taskId;
+
+    /** Emitted when the "Cancel" button is clicked. */
+    @Output()
+    cancelAttachForm: EventEmitter<void> = new EventEmitter<void>();
+
+    /** Emitted when the form associated with the form task is attached. */
+    @Output()
+    completeAttachForm: EventEmitter<void> = new EventEmitter<void>();
+
+    /** Emitted when an error occurs. */
+    @Output()
+    error: EventEmitter<any> = new EventEmitter<any>();
+
+    forms: Form[];
+
+    formKey: number;
+
+    ngOnInit() {
+        this.loadFormsTask();
+    }
+
+    ngOnChanges() {
+        this.loadFormsTask();
+    }
+
+    onCancelButtonClick(): void {
+        this.cancelAttachForm.emit();
+    }
+
+    onAttachFormButtonClick(): void {
+        this.attachForm(this.taskId, this.formKey);
+    }
+
+    private loadFormsTask(): void {
+        this.taskService.getFormList().subscribe((res: Form[]) => {
+                this.forms = res;
+            },
+            (err) => {
+                this.error.emit(err);
+                this.logService.error('An error occurred while trying to get the forms');
+            });
+    }
+
+    private attachForm(taskId: string, formKey: number) {
+        if (taskId && formKey) {
+            this.taskService.attachFormToATask(taskId, formKey)
+                .subscribe((res) => {
+                    this.completeAttachForm.emit();
+                });
+        }
+    }
+}