MOBILE-2486 forum: Invalidate discussion when a rating is updated

src/addon/mod/forum/components/post/addon-mod-forum-post.html

@@ -23,7 +23,7 @@
         </ng-container>
     </div>
 </ion-card-content>
-<core-rating-rate *ngIf="forum && ratingInfo" [ratingInfo]="ratingInfo" contextLevel="module" [instanceId]="componentId" [itemId]="post.id" [itemSetId]="discussionId" [courseId]="courseId" [aggregateMethod]="forum.assessed" [scaleId]="forum.scale" [userId]="post.userid"></core-rating-rate>
+<core-rating-rate *ngIf="forum && ratingInfo" [ratingInfo]="ratingInfo" contextLevel="module" [instanceId]="componentId" [itemId]="post.id" [itemSetId]="discussionId" [courseId]="courseId" [aggregateMethod]="forum.assessed" [scaleId]="forum.scale" [userId]="post.userid" (onUpdate)="ratingUpdated()"></core-rating-rate>
 <core-rating-aggregate *ngIf="forum && ratingInfo" [ratingInfo]="ratingInfo" contextLevel="module" [instanceId]="componentId" [itemId]="post.id" [courseId]="courseId" [aggregateMethod]="forum.assessed" [scaleId]="forum.scale"></core-rating-aggregate>
 <ion-item no-padding text-end *ngIf="post.id && post.canreply" class="addon-forum-reply-button">
     <button ion-button icon-left clear small (click)="showReply()" [attr.aria-controls]="'addon-forum-reply-edit-form-' + uniqueId" [attr.aria-expanded]="replyData.replyingTo === post.id">

src/addon/mod/forum/components/post/post.ts

@@ -307,6 +307,13 @@ export class AddonModForumPostComponent implements OnInit, OnDestroy {
         });
     }
 
+    /**
+     * Function called when rating is updated online.
+     */
+    ratingUpdated(): void {
+        this.forumProvider.invalidateDiscussionPosts(this.discussionId);
+    }
+
     /**
      * Component being destroyed.
      */

src/core/rating/components/rate/rate.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input, OnChanges, SimpleChange } from '@angular/core';
+import { Component, EventEmitter, Input, OnChanges, Output, SimpleChange  } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreRatingProvider, CoreRatingInfo, CoreRatingInfoItem, CoreRatingScale } from '@core/rating/providers/rating';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
@@ -35,13 +35,16 @@ export class CoreRatingRateComponent implements OnChanges {
     @Input() aggregateMethod: number;
     @Input() scaleId: number;
     @Input() userId: number;
+    @Output() onUpdate: EventEmitter<void>; // Event emitted when the rating is updated online.
 
     item: CoreRatingInfoItem;
     scale: CoreRatingScale;
     rating: number;
 
     constructor(private domUtils: CoreDomUtilsProvider, private translate: TranslateService,
-            private ratingProvider: CoreRatingProvider, private ratingOffline: CoreRatingOfflineProvider) {}
+            private ratingProvider: CoreRatingProvider, private ratingOffline: CoreRatingOfflineProvider) {
+        this.onUpdate = new EventEmitter<void>();
+    }
 
     /**
      * Detect changes on input properties.
@@ -96,6 +99,8 @@ export class CoreRatingRateComponent implements OnChanges {
                 .then((response) => {
             if (response == null) {
                 this.domUtils.showToast('core.datastoredoffline', true, 3000);
+            } else {
+                this.onUpdate.emit();
             }
         }).catch((error) => {
             this.domUtils.showErrorModal(error);