Added services and models

src/app/core/tasks/models/task-object.model.ts

@@ -0,0 +1,30 @@
+import { Observable } from 'rxjs';
+
+import { CacheableObject } from '../../cache/object-cache.reducer';
+import { DSpaceObject } from '../../shared/dspace-object.model';
+import { ListableObject } from '../../../shared/object-collection/shared/listable-object.model';
+import { RemoteData } from '../../data/remote-data';
+import { Workflowitem } from '../../submission/models/workflowitem.model';
+
+export class TaskObject extends DSpaceObject implements CacheableObject, ListableObject {
+
+  /**
+   * The task identifier
+   */
+  id: string;
+
+  /**
+   * The workflow step
+   */
+  step: string;
+
+  /**
+   * The task action type
+   */
+  action: string;
+
+  /**
+   * The workflowitem object whom this task is related
+   */
+  workflowitem: Observable<RemoteData<Workflowitem>> | Workflowitem;
+}