63667: Extract update tracker

src/app/shared/trackable/abstract-trackable.component.ts

@@ -0,0 +1,78 @@
+import { ObjectUpdatesService } from '../../core/data/object-updates/object-updates.service';
+import { NotificationsService } from '../notifications/notifications.service';
+import { TranslateService } from '@ngx-translate/core';
+import { Observable } from 'rxjs';
+import { Component } from '@angular/core';
+
+/**
+ * Abstract Component that is able to track changes made in the inheriting component using the ObjectUpdateService
+ */
+@Component({
+  selector: 'ds-abstract-trackable',
+  template: ''
+})
+export class AbstractTrackableComponent {
+
+  /**
+   * The time span for being able to undo discarding changes
+   */
+  public discardTimeOut: number;
+  public message: string;
+  public url: string;
+  public notificationsPrefix = 'static-pages.form.notification';
+
+  constructor(
+    public objectUpdatesService: ObjectUpdatesService,
+    public notificationsService: NotificationsService,
+    public translateService: TranslateService,
+  ) {
+
+  }
+
+  /**
+   * Request the object updates service to discard all current changes to this item
+   * Shows a notification to remind the user that they can undo this
+   */
+  discard() {
+    const undoNotification = this.notificationsService.info(this.getNotificationTitle('discarded'), this.getNotificationContent('discarded'), {timeOut: this.discardTimeOut});
+    this.objectUpdatesService.discardFieldUpdates(this.url, undoNotification);
+  }
+
+  /**
+   * Request the object updates service to undo discarding all changes to this item
+   */
+  reinstate() {
+    this.objectUpdatesService.reinstateFieldUpdates(this.url);
+  }
+
+  /**
+   * Checks whether or not the object is currently reinstatable
+   */
+  isReinstatable(): Observable<boolean> {
+    return this.objectUpdatesService.isReinstatable(this.url);
+  }
+
+  /**
+   * Checks whether or not there are currently updates for this object
+   */
+  hasChanges(): Observable<boolean> {
+    return this.objectUpdatesService.hasUpdates(this.url);
+  }
+
+  /**
+   * Get translated notification title
+   * @param key
+   */
+  private getNotificationTitle(key: string) {
+    return this.translateService.instant(this.notificationsPrefix + key + '.title');
+  }
+
+  /**
+   * Get translated notification content
+   * @param key
+   */
+  private getNotificationContent(key: string) {
+    return this.translateService.instant(this.notificationsPrefix + key + '.content');
+
+  }
+}