MOBILE-3227 filter: Get all course blocks filters at once

src/core/block/components/pre-rendered-block/core-block-pre-rendered.html

@@ -1,11 +1,11 @@
 <ion-item-divider text-wrap *ngIf="title">
-    <h2><core-format-text [text]="title | translate" contextLevel="block" [contextInstanceId]="block.instanceid"></core-format-text></h2>
+    <h2><core-format-text [text]="title | translate" contextLevel="block" [contextInstanceId]="block.instanceid" [courseId]="courseId"></core-format-text></h2>
 </ion-item-divider>
 <core-loading [hideUntil]="loaded" class="core-loading-center">
     <ion-item *ngIf="block.contents.content" text-wrap class="core-block-content">
-        <core-format-text [text]="block.contents.content" contextLevel="block" [contextInstanceId]="block.instanceid"></core-format-text>
+        <core-format-text [text]="block.contents.content" contextLevel="block" [contextInstanceId]="block.instanceid" [courseId]="courseId"></core-format-text>
     </ion-item>
     <ion-item *ngIf="block.contents.footer" text-wrap class="core-block-footer">
-        <core-format-text [text]="block.contents.footer" contextLevel="block" [contextInstanceId]="block.instanceid"></core-format-text>
+        <core-format-text [text]="block.contents.footer" contextLevel="block" [contextInstanceId]="block.instanceid" [courseId]="courseId"></core-format-text>
     </ion-item>
 </core-loading>

src/core/block/components/pre-rendered-block/pre-rendered-block.ts

@@ -24,6 +24,8 @@ import { CoreBlockBaseComponent } from '../../classes/base-block-component';
 })
 export class CoreBlockPreRenderedComponent  extends CoreBlockBaseComponent implements OnInit {
 
+    courseId: number;
+
     constructor(injector: Injector) {
         super(injector, 'CoreBlockPreRenderedComponent');
     }
@@ -34,6 +36,8 @@ export class CoreBlockPreRenderedComponent  extends CoreBlockBaseComponent imple
     ngOnInit(): void {
         super.ngOnInit();
 
+        this.courseId = this.contextLevel == 'course' ? this.instanceId : undefined;
+
         this.fetchContentDefaultError = 'Error getting ' + this.block.contents.title + ' data.';
     }
 

src/core/course/providers/course.ts

@@ -113,12 +113,14 @@ export class CoreCourseProvider {
     /**
      * Check if the get course blocks WS is available in current site.
      *
+     * @param site Site to check. If not defined, current site.
      * @return Whether it's available.
      * @since 3.7
      */
-    canGetCourseBlocks(): boolean {
+    canGetCourseBlocks(site?: CoreSite): boolean {
-        return this.sitesProvider.getCurrentSite().isVersionGreaterEqualThan('3.7') &&
+        site = site || this.sitesProvider.getCurrentSite();
-            this.sitesProvider.wsAvailableInCurrentSite('core_block_get_course_blocks');
+
+        return site.isVersionGreaterEqualThan('3.7') && site.wsAvailable('core_block_get_course_blocks');
     }
 
     /**

src/core/filter/providers/helper.ts

@@ -64,6 +64,29 @@ export class CoreFilterHelperProvider {
         });
     }
 
+    /**
+     * Get the contexts of all blocks in a course.
+     *
+     * @param courseId Course ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the contexts.
+     */
+    getBlocksContexts(courseId: number, siteId?: string): Promise<{contextlevel: string, instanceid: number}[]> {
+
+        return this.courseProvider.getCourseBlocks(courseId, siteId).then((blocks) => {
+            const contexts: {contextlevel: string, instanceid: number}[] = [];
+
+            blocks.forEach((block) => {
+                contexts.push({
+                    contextlevel: 'block',
+                    instanceid: block.instanceid
+                });
+            });
+
+            return contexts;
+        });
+    }
+
     /**
      * Get some filters from memory cache. If not in cache, get them and store them in cache.
      *
@@ -200,6 +223,11 @@ export class CoreFilterHelperProvider {
                             // If enrolled, get all enrolled courses filters with a single call to decrease number of WS calls.
                             const getFilters = this.getCourseContexts.bind(this, instanceId, siteId);
 
+                            return this.getCacheableFilters(contextLevel, instanceId, getFilters, options, site);
+                        } else if (contextLevel == 'block' && options.courseId && this.courseProvider.canGetCourseBlocks(site)) {
+                            // Get all the course blocks filters with a single call to decrease number of WS calls.
+                            const getFilters = this.getBlocksContexts.bind(this, options.courseId, siteId);
+
                             return this.getCacheableFilters(contextLevel, instanceId, getFilters, options, site);
                         }