MOBILE-2563 course: Decrease calls to core_course_get_contents

src/addon/mod/resource/providers/module-handler.ts

@@ -66,7 +66,7 @@ export class AddonModResourceModuleHandler implements CoreCourseModuleHandler {
         };
 
         const handlerData: CoreCourseModuleHandlerData = {
-            icon: this.courseProvider.getModuleIconSrc('resource'),
+            icon: this.courseProvider.getModuleIconSrc(this.modName),
             title: module.name,
             class: 'addon-mod_resource-handler',
             showDownloadButton: true,
@@ -88,16 +88,12 @@ export class AddonModResourceModuleHandler implements CoreCourseModuleHandler {
             } ]
         };
 
-        this.getResourceData(module, courseId).then((data) => {
+        this.getResourceData(module, courseId, handlerData).then((data) => {
             handlerData.icon = data.icon;
             handlerData.extraBadge = data.extra;
             handlerData.extraBadgeColor = 'light';
         });
 
-        this.hideOpenButton(module, courseId).then((hideOpenButton) => {
-            handlerData.buttons[0].hidden = hideOpenButton;
-        });
-
         return handlerData;
     }
 
@@ -109,7 +105,8 @@ export class AddonModResourceModuleHandler implements CoreCourseModuleHandler {
      * @return {Promise<boolean>} Resolved when done.
      */
     protected hideOpenButton(module: any, courseId: number): Promise<boolean> {
-        return this.courseProvider.loadModuleContents(module, courseId).then(() => {
+        return this.courseProvider.loadModuleContents(module, courseId, undefined, false, false, undefined, this.modName)
+                .then(() => {
             return this.prefetchDelegate.getModuleStatus(module, courseId).then((status) => {
                 return status !== CoreConstants.DOWNLOADED || this.resourceHelper.isDisplayedInIframe(module);
             });
@@ -123,55 +120,55 @@ export class AddonModResourceModuleHandler implements CoreCourseModuleHandler {
      * @param {number} courseId   The course ID.
      * @return {Promise<any>}     Resource data.
      */
-    protected getResourceData(module: any, courseId: number): Promise<any> {
+    protected getResourceData(module: any, courseId: number, handlerData: CoreCourseModuleHandlerData): Promise<any> {
-        return this.resourceProvider.getResourceData(courseId, module.id).then((info) => {
+        const promises = [];
-            let promise;
+        let resourceInfo;
 
-            if (info.contentfiles && info.contentfiles.length == 1) {
+        // Check if the button needs to be shown or not. This also loads the module contents.
-                promise = Promise.resolve(info.contentfiles);
+        promises.push(this.hideOpenButton(module, courseId).then((hideOpenButton) => {
-            } else {
+            handlerData.buttons[0].hidden = hideOpenButton;
-                promise = this.courseProvider.loadModuleContents(module, courseId).then(() => {
+        }));
-                    if (module.contents.length) {
+
-                        return module.contents;
+        // Get the resource data.
-                    }
+        promises.push(this.resourceProvider.getResourceData(courseId, module.id).then((info) => {
-                });
+            resourceInfo = info;
+        }));
+
+        return Promise.all(promises).then(() => {
+            const files = module.contents && module.contents.length ? module.contents : resourceInfo.contentfiles,
+                resourceData = {
+                    icon: '',
+                    extra: ''
+                },
+                options = this.textUtils.unserialize(resourceInfo.displayoptions),
+                extra = [];
+
+            if (files && files.length) {
+                const file = files[0];
+                resourceData.icon = this.mimetypeUtils.getFileIcon(file.filename);
+
+                if (options.showsize) {
+                    const size = files.reduce((result, file) => {
+                        return result + file.filesize;
+                    }, 0);
+                    extra.push(this.textUtils.bytesToSize(size, 1));
+                }
+                if (options.showtype) {
+                    extra.push(this.mimetypeUtils.getMimetypeDescription(file));
+                }
             }
 
-            return promise.then((files) => {
+            if (resourceData.icon == '') {
-                const resourceData = {
+                resourceData.icon = this.courseProvider.getModuleIconSrc(this.modName);
-                        icon: '',
+            }
-                        extra: ''
-                    },
-                    options = this.textUtils.unserialize(info.displayoptions),
-                    extra = [];
 
-                if (files && files.length) {
+            if (options.showdate) {
-                    const file = files[0];
+                extra.push(this.translate.instant('addon.mod_resource.uploadeddate',
-                    resourceData.icon = this.mimetypeUtils.getFileIcon(file.filename);
+                    {$a: moment(resourceInfo.timemodified * 1000).format('LLL')}));
+            }
+            resourceData.extra += extra.join(' ');
 
-                    if (options.showsize) {
+            return resourceData;
-                        const size = files.reduce((result, file) => {
-                            return result + file.filesize;
-                        }, 0);
-                        extra.push(this.textUtils.bytesToSize(size, 1));
-                    }
-                    if (options.showtype) {
-                        extra.push(this.mimetypeUtils.getMimetypeDescription(file));
-                    }
-                }
-
-                if (resourceData.icon == '') {
-                    resourceData.icon = this.courseProvider.getModuleIconSrc('resource');
-                }
-
-                if (options.showdate) {
-                    extra.push(this.translate.instant('addon.mod_resource.uploadeddate',
-                        {$a: moment(info.timemodified * 1000).format('LLL')}));
-                }
-                resourceData.extra += extra.join(' ');
-
-                return resourceData;
-            });
         });
     }
 

src/addon/mod/resource/providers/prefetch-handler.ts

@@ -70,6 +70,11 @@ export class AddonModResourcePrefetchHandler extends CoreCourseResourcePrefetchH
                 promises.push(this.resourceProvider.getResourceData(courseId, module.id));
             }
 
+            /* When prefetching we usually use ignoreCache=true. However, this WS call can return a lot of data, so if
+               a user downloads resources 1 by 1 we would be downloading the same data over and over again. Since
+               this data won't change often it's probably better to use ignoreCache=false. */
+            promises.push(this.courseProvider.getModule(module.id, courseId, undefined, false, false, undefined, this.modName));
+
             return Promise.all(promises);
         });
     }
@@ -96,7 +101,7 @@ export class AddonModResourcePrefetchHandler extends CoreCourseResourcePrefetchH
         const promises = [];
 
         promises.push(this.resourceProvider.invalidateResourceData(courseId));
-        promises.push(this.courseProvider.invalidateModule(module.id));
+        promises.push(this.courseProvider.invalidateModule(module.id, undefined, this.modName));
 
         return Promise.all(promises);
     }

src/addon/mod/resource/providers/resource.ts

@@ -104,7 +104,7 @@ export class AddonModResourceProvider {
 
         promises.push(this.invalidateResourceData(courseId, siteId));
         promises.push(this.filepoolProvider.invalidateFilesByComponent(siteId, AddonModResourceProvider.COMPONENT, moduleId));
-        promises.push(this.courseProvider.invalidateModule(moduleId, siteId));
+        promises.push(this.courseProvider.invalidateModule(moduleId, siteId, 'resource'));
 
         return this.utils.allPromises(promises);
     }

src/addon/mod/url/components/index/index.ts

@@ -78,7 +78,7 @@ export class AddonModUrlIndexComponent extends CoreCourseModuleMainResourceCompo
             canGetUrl = false;
 
             // Fallback in case is not prefetched or not available.
-            return this.courseProvider.getModule(this.module.id, this.courseId);
+            return this.courseProvider.getModule(this.module.id, this.courseId, undefined, false, false, undefined, 'url');
         }).then((url) => {
             this.description = url.intro || url.description;
             this.dataRetrieved.emit(url);
@@ -95,7 +95,7 @@ export class AddonModUrlIndexComponent extends CoreCourseModuleMainResourceCompo
 
                 if (!mod.contents || !mod.contents.length) {
                     // Try to load module contents, it's needed to get the URL with parameters.
-                    return this.courseProvider.loadModuleContents(mod, this.courseId);
+                    return this.courseProvider.loadModuleContents(mod, this.courseId, undefined, false, false, undefined, 'url');
                 }
             }
         }).then(() => {

src/addon/mod/url/providers/link-handler.ts

@@ -22,6 +22,7 @@ import { CoreCourseHelperProvider } from '@core/course/providers/helper';
 @Injectable()
 export class AddonModUrlLinkHandler extends CoreContentLinksModuleIndexHandler {
     name = 'AddonModUrlLinkHandler';
+    useModNameToGetModule = true;
 
     constructor(courseHelper: CoreCourseHelperProvider) {
         super(courseHelper, 'AddonModUrl', 'url');

src/addon/mod/url/providers/module-handler.ts

@@ -50,7 +50,7 @@ export class AddonModUrlModuleHandler implements CoreCourseModuleHandler {
      */
     getData(module: any, courseId: number, sectionId: number): CoreCourseModuleHandlerData {
         const handlerData = {
-            icon: this.courseProvider.getModuleIconSrc('url'),
+            icon: this.courseProvider.getModuleIconSrc(this.modName),
             title: module.name,
             class: 'addon-mod_url-handler',
             showDownloadButton: false,
@@ -89,7 +89,8 @@ export class AddonModUrlModuleHandler implements CoreCourseModuleHandler {
      * @return {Promise<boolean>} Resolved when done.
      */
     protected hideLinkButton(module: any, courseId: number): Promise<boolean> {
-        return this.courseProvider.loadModuleContents(module, courseId).then(() => {
+        return this.courseProvider.loadModuleContents(module, courseId, undefined, false, false, undefined, this.modName)
+                .then(() => {
             return !(module.contents && module.contents[0] && module.contents[0].fileurl);
         });
     }

src/addon/mod/url/providers/url.ts

@@ -102,7 +102,7 @@ export class AddonModUrlProvider {
         const promises = [];
 
         promises.push(this.invalidateUrlData(courseId, siteId));
-        promises.push(this.courseProvider.invalidateModule(moduleId, siteId));
+        promises.push(this.courseProvider.invalidateModule(moduleId, siteId, 'url'));
 
         return this.utils.allPromises(promises);
     }

src/core/contentlinks/classes/module-grade-handler.ts

@@ -30,6 +30,13 @@ export class CoreContentLinksModuleGradeHandler extends CoreContentLinksHandlerB
      */
     canReview: boolean;
 
+    /**
+     * If this boolean is set to true, the app will retrieve all modules with this modName with a single WS call.
+     * This reduces the number of WS calls, but it isn't recommended for modules that can return a lot of contents.
+     * @type {boolean}
+     */
+    protected useModNameToGetModule = false;
+
     /**
      * Construct the handler.
      *
@@ -69,7 +76,8 @@ export class CoreContentLinksModuleGradeHandler extends CoreContentLinksHandlerB
                 this.sitesProvider.getSite(siteId).then((site) => {
                     if (!params.userid || params.userid == site.getUserId()) {
                         // No user specified or current user. Navigate to module.
-                        this.courseHelper.navigateToModule(parseInt(params.id, 10), siteId, courseId);
+                        this.courseHelper.navigateToModule(parseInt(params.id, 10), siteId, courseId, undefined,
+                                this.useModNameToGetModule ? this.modName : undefined);
                     } else if (this.canReview) {
                         // Use the goToReview function.
                         this.goToReview(url, params, courseId, siteId, navCtrl);

src/core/contentlinks/classes/module-index-handler.ts

@@ -21,6 +21,13 @@ import { CoreCourseHelperProvider } from '@core/course/providers/helper';
  */
 export class CoreContentLinksModuleIndexHandler extends CoreContentLinksHandlerBase {
 
+    /**
+     * If this boolean is set to true, the app will retrieve all modules with this modName with a single WS call.
+     * This reduces the number of WS calls, but it isn't recommended for modules that can return a lot of contents.
+     * @type {boolean}
+     */
+    protected useModNameToGetModule = false;
+
     /**
      * Construct the handler.
      *
@@ -52,7 +59,8 @@ export class CoreContentLinksModuleIndexHandler extends CoreContentLinksHandlerB
 
         return [{
             action: (siteId, navCtrl?): void => {
-                this.courseHelper.navigateToModule(parseInt(params.id, 10), siteId, courseId);
+                this.courseHelper.navigateToModule(parseInt(params.id, 10), siteId, courseId, undefined,
+                    this.useModNameToGetModule ? this.modName : undefined);
             }
         }];
     }

src/core/course/providers/course.ts

@@ -198,10 +198,12 @@ export class CoreCourseProvider {
      * @param {boolean} [preferCache] True if shouldn't call WS if data is cached, false otherwise.
      * @param {boolean} [ignoreCache] True if it should ignore cached data (it will always fail in offline or server down).
      * @param {string} [siteId] Site ID. If not defined, current site.
+     * @param {string} [modName] If set, the app will retrieve all modules of this type with a single WS call. This reduces the
+     *                           number of WS calls, but it isn't recommended for modules that can return a lot of contents.
      * @return {Promise<any>} Promise resolved with the module.
      */
     getModule(moduleId: number, courseId?: number, sectionId?: number, preferCache?: boolean, ignoreCache?: boolean,
-            siteId?: string): Promise<any> {
+            siteId?: string, modName?: string): Promise<any> {
         siteId = siteId || this.sitesProvider.getCurrentSiteId();
 
         let promise;
@@ -226,18 +228,27 @@ export class CoreCourseProvider {
 
             const params = {
                     courseid: courseId,
-                    options: [
+                    options: []
-                        {
-                            name: 'cmid',
-                            value: moduleId
-                        }
-                    ]
                 },
                 preSets: any = {
-                    cacheKey: this.getModuleCacheKey(moduleId),
                     omitExpires: preferCache
                 };
 
+            // If modName is set, retrieve all modules of that type. Otherwise get only the module.
+            if (modName) {
+                params.options.push({
+                    name: 'modname',
+                    value: modName
+                });
+                preSets.cacheKey = this.getModuleByModNameCacheKey(modName);
+            } else {
+                params.options.push({
+                    name: 'cmid',
+                    value: moduleId
+                });
+                preSets.cacheKey = this.getModuleCacheKey(moduleId);
+            }
+
             if (!preferCache && ignoreCache) {
                 preSets.getFromCache = 0;
                 preSets.emergencyCache = 0;
@@ -376,6 +387,16 @@ export class CoreCourseProvider {
         return this.ROOT_CACHE_KEY + 'module:' + moduleId;
     }
 
+    /**
+     * Get cache key for module by modname WS calls.
+     *
+     * @param {string} modName Name of the module.
+     * @return {string} Cache key.
+     */
+    protected getModuleByModNameCacheKey(modName: string): string {
+        return this.ROOT_CACHE_KEY + 'module:modName:' + modName;
+    }
+
     /**
      * Returns the source to a module icon.
      *
@@ -518,11 +539,20 @@ export class CoreCourseProvider {
      *
      * @param {number} moduleId Module ID.
      * @param {string} [siteId] Site ID. If not defined, current site.
+     * @param {string} [modName] Module name. E.g. 'label', 'url', ...
      * @return {Promise<any>} Promise resolved when the data is invalidated.
      */
-    invalidateModule(moduleId: number, siteId?: string): Promise<any> {
+    invalidateModule(moduleId: number, siteId?: string, modName?: string): Promise<any> {
         return this.sitesProvider.getSite(siteId).then((site) => {
-            return site.invalidateWsCacheForKey(this.getModuleCacheKey(moduleId));
+            const promises = [];
+
+            if (modName) {
+                promises.push(site.invalidateWsCacheForKey(this.getModuleByModNameCacheKey(modName)));
+            }
+
+            promises.push(site.invalidateWsCacheForKey(this.getModuleCacheKey(moduleId)));
+
+            return Promise.all(promises);
         });
     }
 
@@ -574,16 +604,19 @@ export class CoreCourseProvider {
      * @param {boolean} [preferCache] True if shouldn't call WS if data is cached, false otherwise.
      * @param {boolean} [ignoreCache] True if it should ignore cached data (it will always fail in offline or server down).
      * @param {string} [siteId] Site ID. If not defined, current site.
+     * @param {string} [modName] If set, the app will retrieve all modules of this type with a single WS call. This reduces the
+     *                           number of WS calls, but it isn't recommended for modules that can return a lot of contents.
      * @return {Promise<void>} Promise resolved when loaded.
      */
     loadModuleContents(module: any, courseId?: number, sectionId?: number, preferCache?: boolean, ignoreCache?: boolean,
-        siteId?: string): Promise<void> {
+            siteId?: string, modName?: string): Promise<void> {
+
         if (!ignoreCache && module.contents && module.contents.length) {
             // Already loaded.
             return Promise.resolve();
         }
 
-        return this.getModule(module.id, courseId, sectionId, preferCache, ignoreCache, siteId).then((mod) => {
+        return this.getModule(module.id, courseId, sectionId, preferCache, ignoreCache, siteId, modName).then((mod) => {
             module.contents = mod.contents;
         });
     }

src/core/course/providers/helper.ts

@@ -887,9 +887,11 @@ export class CoreCourseHelperProvider {
      * @param {string} [siteId] Site ID. If not defined, current site.
      * @param {number} [courseId] Course ID. If not defined we'll try to retrieve it from the site.
      * @param {number} [sectionId] Section the module belongs to. If not defined we'll try to retrieve it from the site.
+     * @param {string} [modName] If set, the app will retrieve all modules of this type with a single WS call. This reduces the
+     *                           number of WS calls, but it isn't recommended for modules that can return a lot of contents.
      * @return {Promise<void>} Promise resolved when done.
      */
-    navigateToModule(moduleId: number, siteId?: string, courseId?: number, sectionId?: number): Promise<void> {
+    navigateToModule(moduleId: number, siteId?: string, courseId?: number, sectionId?: number, modName?: string): Promise<void> {
         siteId = siteId || this.sitesProvider.getCurrentSiteId();
 
         const modal = this.domUtils.showModalLoading();
@@ -923,7 +925,7 @@ export class CoreCourseHelperProvider {
             site = s;
 
             // Get the module.
-            return this.courseProvider.getModule(moduleId, courseId, sectionId, false, false, siteId);
+            return this.courseProvider.getModule(moduleId, courseId, sectionId, false, false, siteId, modName);
         }).then((module) => {
             const params = {
                 course: { id: courseId },