MOBILE-4522 forum: Don't calculate unread number if tracking disabled

src/addons/mod/forum/services/forum.ts

@@ -2134,3 +2134,12 @@ export type AddonModForumMarkReadData = {
     courseId: number;
     moduleId: number;
 };
+
+/**
+ * Tracking options.
+ */
+export const enum AddonModForumTracking {
+    OFF = 0,
+    OPTIONAL = 1,
+    FORCED = 2,
+}

src/addons/mod/forum/services/handlers/module.ts

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import { Injectable, Type } from '@angular/core';
-import { AddonModForum, AddonModForumProvider } from '../forum';
+import { AddonModForum, AddonModForumProvider, AddonModForumTracking } from '../forum';
 import { makeSingleton, Translate } from '@singletons';
 import { CoreEvents } from '@singletons/events';
 import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
@@ -21,6 +21,8 @@ import { CoreCourseModuleHandler, CoreCourseModuleHandlerData } from '@features/
 import { CoreConstants, ModPurpose } from '@/core/constants';
 import { CoreModuleHandlerBase } from '@features/course/classes/module-base-handler';
 import { CoreCourseModuleData } from '@features/course/services/course-helper';
+import { CoreTextUtils } from '@services/utils/text';
+import { CoreUser } from '@features/user/services/user';
 
 /**
  * Handler to support forum modules.
@@ -55,6 +57,29 @@ export class AddonModForumModuleHandlerService extends CoreModuleHandlerBase imp
     async getData(module: CoreCourseModuleData, courseId: number): Promise<CoreCourseModuleHandlerData> {
         const data = await super.getData(module, courseId);
 
+        const customData = module.customdata ?
+            CoreTextUtils.parseJSON<{ trackingtype?: string | number } | ''>(module.customdata, {}) : {};
+        const trackingType = typeof customData !== 'string' && customData.trackingtype !== undefined ?
+            Number(customData.trackingtype) : undefined;
+
+        if (trackingType === AddonModForumTracking.OFF) {
+            // Tracking is disabled in forum.
+            data.extraBadge = '';
+
+            return data;
+        }
+
+        if (trackingType === AddonModForumTracking.OPTIONAL) {
+            // Forum has tracking optional, check if user has tracking enabled.
+            const user = await CoreUser.getProfile(CoreSites.getCurrentSiteUserId());
+
+            if (user.trackforums === 0) {
+                data.extraBadge = '';
+
+                return data;
+            }
+        }
+
         if ('afterlink' in module && !!module.afterlink) {
             const match = />(\d+)[^<]+/.exec(module.afterlink);
             data.extraBadge = match ? Translate.instant('addon.mod_forum.unreadpostsnumber', { $a : match[1] }) : '';

src/core/features/user/services/user.ts

@@ -966,6 +966,7 @@ export type CoreUserData = {
     theme?: string; // Theme name such as "standard", must exist on server.
     timezone?: string; // Timezone code such as Australia/Perth, or 99 for default.
     mailformat?: number; // Mail format code is 0 for plain text, 1 for HTML etc.
+    trackforums?: number; // @since 4.4. Whether the user is tracking forums.
     description?: string; // User profile description.
     descriptionformat?: number; // Int format (1 = HTML, 0 = MOODLE, 2 = PLAIN or 4 = MARKDOWN).
     city?: string; // Home city of the user.