MOBILE-4627 book: Don't download all files when opening

src/addons/mod/book/pages/contents/contents.html

@@ -22,13 +22,6 @@
 
     <core-loading [hideUntil]="loaded">
         <div class="safe-area-padding-horizontal core-swipe-slides-container">
-            <ion-card class="core-warning-card" *ngIf="warning">
-                <ion-item>
-                    <ion-icon name="fas-triangle-exclamation" slot="start" aria-hidden="true" />
-                    <ion-label><span [innerHTML]="warning"></span></ion-label>
-                </ion-item>
-            </ion-card>
-
             <core-swipe-slides [manager]="manager" [options]="swiperOpts">
                 <ng-template let-chapter="item" let-active="active">
                     <div class="ion-padding">

src/addons/mod/book/pages/contents/contents.ts

@@ -12,15 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { DownloadStatus } from '@/core/constants';
 import { Component, OnDestroy, OnInit, ViewChild } from '@angular/core';
 import { CoreError } from '@classes/errors/error';
 import { CoreSwipeSlidesItemsManager } from '@classes/items-management/swipe-slides-items-manager';
 import { CoreSwipeSlidesItemsManagerSource } from '@classes/items-management/swipe-slides-items-manager-source';
 import { CoreNavigationBarItem } from '@components/navigation-bar/navigation-bar';
 import { CoreSwipeSlidesComponent, CoreSwipeSlidesOptions } from '@components/swipe-slides/swipe-slides';
-import { CoreCourseResourceDownloadResult } from '@features/course/classes/main-resource-component';
+import { CoreCourse, CoreCourseModuleContentFile } from '@features/course/services/course';
-import { CoreCourse } from '@features/course/services/course';
 import { CoreCourseModuleData } from '@features/course/services/course-helper';
 import { CoreCourseModulePrefetchDelegate } from '@features/course/services/module-prefetch-delegate';
 import { CoreTag, CoreTagItem } from '@features/tag/services/tag';
@@ -59,7 +57,6 @@ export class AddonModBookContentsPage implements OnInit, OnDestroy {
     initialChapterId?: number;
     component = ADDON_MOD_BOOK_COMPONENT;
     manager?: CoreSwipeSlidesItemsManager<LoadedChapter, AddonModBookSlidesItemsManagerSource>;
-    warning = '';
     displayNavBar = true;
     navigationItems: CoreNavigationBarItem<AddonModBookTocChapter>[] = [];
     swiperOpts: CoreSwipeSlidesOptions = {
@@ -130,24 +127,14 @@ export class AddonModBookContentsPage implements OnInit, OnDestroy {
                 return;
             }
 
-            const { module, book } = await source.loadBookData();
+            const { book } = await source.loadBookData();
-
-            const downloadResult = await this.downloadResourceIfNeeded(module, refresh);
 
             this.displayNavBar = book.navstyle != AddonModBookNavStyle.TOC_ONLY;
             this.title = book.name;
 
-            // Get contents. No need to refresh, it has been done in downloadResourceIfNeeded.
+            await source.loadContents(refresh);
-            await source.loadContents();
 
             await source.load();
-
-            if (downloadResult?.failed) {
-                const error = CoreTextUtils.getErrorMessageFromError(downloadResult.error) || downloadResult.error;
-                this.warning = Translate.instant('core.errordownloadingsomefiles') + (error ? ' ' + error : '');
-            } else {
-                this.warning = '';
-            }
         } catch (error) {
             CoreDomUtils.showErrorModalDefault(error, 'core.course.errorgetmodule', true);
         } finally {
@@ -155,62 +142,6 @@ export class AddonModBookContentsPage implements OnInit, OnDestroy {
         }
     }
 
-    /**
-     * Download a resource if needed.
-     * If the download call fails the promise won't be rejected, but the error will be included in the returned object.
-     * If module.contents cannot be loaded then the Promise will be rejected.
-     *
-     * @param module Module to download.
-     * @param refresh Whether we're refreshing data.
-     * @returns Promise resolved when done.
-     */
-    protected async downloadResourceIfNeeded(
-        module: CoreCourseModuleData,
-        refresh = false,
-    ): Promise<CoreCourseResourceDownloadResult> {
-
-        const result: CoreCourseResourceDownloadResult = {
-            failed: false,
-        };
-        let contentsAlreadyLoaded = false;
-
-        // Get module status to determine if it needs to be downloaded.
-        const status = await CoreCourseModulePrefetchDelegate.getModuleStatus(module, this.courseId, undefined, refresh);
-
-        if (status !== DownloadStatus.DOWNLOADED) {
-            // Download content. This function also loads module contents if needed.
-            try {
-                await CoreCourseModulePrefetchDelegate.downloadModule(module, this.courseId);
-
-                // If we reach here it means the download process already loaded the contents, no need to do it again.
-                contentsAlreadyLoaded = true;
-            } catch (error) {
-                // Mark download as failed but go on since the main files could have been downloaded.
-                result.failed = true;
-                result.error = error;
-            }
-        }
-
-        if (!module.contents?.length || (refresh && !contentsAlreadyLoaded)) {
-            // Try to load the contents.
-            const ignoreCache = refresh && CoreNetwork.isOnline();
-
-            try {
-                await CoreCourse.loadModuleContents(module, undefined, undefined, false, ignoreCache);
-            } catch (error) {
-                // Error loading contents. If we ignored cache, try to get the cached value.
-                if (ignoreCache && !module.contents) {
-                    await CoreCourse.loadModuleContents(module);
-                } else if (!module.contents) {
-                    // Not able to load contents, throw the error.
-                    throw error;
-                }
-            }
-        }
-
-        return result;
-    }
-
     /**
      * Change the current chapter.
      *
@@ -395,18 +326,48 @@ class AddonModBookSlidesItemsManagerSource extends CoreSwipeSlidesItemsManagerSo
 
     /**
      * Load module contents.
+     *
+     * @param refresh Whether we're refreshing data.
      */
-    async loadContents(): Promise<void> {
+    async loadContents(refresh = false): Promise<void> {
         if (!this.module) {
             return;
         }
 
-        const contents = await CoreCourse.getModuleContents(this.module, this.COURSE_ID);
+        const contents = await this.getModuleContents(refresh);
 
         this.contentsMap = AddonModBook.getContentsMap(contents);
         this.chapters = AddonModBook.getTocList(contents);
     }
 
+    /**
+     * Get module contents.
+     *
+     * @param refresh Whether we're refreshing data.
+     * @returns Module contents.
+     */
+    protected async getModuleContents(refresh = false): Promise<CoreCourseModuleContentFile[]> {
+        if (!this.module) {
+            return [];
+        }
+
+        const ignoreCache = refresh && CoreNetwork.isOnline();
+
+        try {
+            return await CoreCourse.getModuleContents(this.module, this.COURSE_ID, undefined, false, ignoreCache);
+        } catch (error) {
+            // Error loading contents. If we ignored cache, try to get the cached value.
+            if (ignoreCache && !this.module.contents) {
+                return await CoreCourse.getModuleContents(this.module);
+            } else if (!this.module.contents) {
+                // Not able to load contents, throw the error.
+                throw error;
+            }
+
+            return this.module.contents;
+        }
+    }
+
     /**
      * @inheritdoc
      */