[ADF-491] Task Attachment List Component (#1877)

* Create a new component Task Attachment List
Improve the datatable to get the rows to show

* The component name should follow the guide style
Move the Content calls in a different service file
Show the attach file inside the viewer

* Change method name

* Datatable should get the path and show the icon

* Improve attachment component

* Improve datatable documentation

* Remove console.log

demo-shell-ng2/app/components/activiti/activiti-demo.component.html

@@ -70,6 +70,12 @@
                             (taskCreated)="onTaskCreated($event)"
                             (taskDeleted)="onTaskDeleted($event)">
                         </activiti-task-details>
+                        <hr>
+                        <h5>Attachments</h5>
+                        <adf-task-attachment-list *ngIf="currentTaskId"
+                          [taskId]="currentTaskId"
+                          (attachmentClick)="onAttachmentClick($event)">
+                        </adf-task-attachment-list>
                     </div>
                 </div>
             </div>

demo-shell-ng2/app/components/activiti/activiti-demo.component.ts

@@ -254,6 +254,12 @@ export class ActivitiDemoComponent implements AfterViewInit {
         this.contentName = content.name;
     }
 
+    onAttachmentClick(content: any) {
+        this.fileShowed = true;
+        this.content = content.contentBlob;
+        this.contentName = content.name;
+    }
+
     onTaskCreated(data: any) {
         this.currentTaskId = data.parentTaskId;
         this.taskList.reload();