diff --git a/src/addons/block/calendarmonth/services/block-handler.ts b/src/addons/block/calendarmonth/services/block-handler.ts
index 793aea115..fa717ab6c 100644
--- a/src/addons/block/calendarmonth/services/block-handler.ts
+++ b/src/addons/block/calendarmonth/services/block-handler.ts
@@ -20,6 +20,7 @@ import { CoreCourseBlock } from '@features/course/services/course';
 import { Params } from '@angular/router';
 import { makeSingleton } from '@singletons';
 import { AddonCalendarMainMenuHandlerService } from '@addons/calendar/services/handlers/mainmenu';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -38,8 +39,8 @@ export class AddonBlockCalendarMonthHandlerService extends CoreBlockBaseHandler
      * @param instanceId The instance ID associated with the context level.
      * @returns Data or promise resolved with the data.
      */
-    getDisplayData(block: CoreCourseBlock, contextLevel: string, instanceId: number): CoreBlockHandlerData {
-        const linkParams: Params = contextLevel == 'course' ? { courseId: instanceId } : {};
+    getDisplayData(block: CoreCourseBlock, contextLevel: ContextLevel, instanceId: number): CoreBlockHandlerData {
+        const linkParams: Params = contextLevel === ContextLevel.COURSE ? { courseId: instanceId } : {};
 
         return {
             title: 'addon.block_calendarmonth.pluginname',
diff --git a/src/addons/block/calendarupcoming/services/block-handler.ts b/src/addons/block/calendarupcoming/services/block-handler.ts
index 6a7b79ce6..be3ff2c1e 100644
--- a/src/addons/block/calendarupcoming/services/block-handler.ts
+++ b/src/addons/block/calendarupcoming/services/block-handler.ts
@@ -21,6 +21,7 @@ import { Params } from '@angular/router';
 import { makeSingleton } from '@singletons';
 import { AddonCalendarMainMenuHandlerService } from '@addons/calendar/services/handlers/mainmenu';
 import { CoreSites } from '@services/sites';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -39,10 +40,10 @@ export class AddonBlockCalendarUpcomingHandlerService extends CoreBlockBaseHandl
      * @param instanceId The instance ID associated with the context level.
      * @returns Data or promise resolved with the data.
      */
-    getDisplayData(block: CoreCourseBlock, contextLevel: string, instanceId: number): CoreBlockHandlerData {
+    getDisplayData(block: CoreCourseBlock, contextLevel: ContextLevel, instanceId: number): CoreBlockHandlerData {
         const linkParams: Params = { upcoming: true };
 
-        if (contextLevel == 'course' && instanceId !== CoreSites.getCurrentSiteHomeId()) {
+        if (contextLevel === ContextLevel.COURSE && instanceId !== CoreSites.getCurrentSiteHomeId()) {
             linkParams.courseId = instanceId;
         }
 
diff --git a/src/addons/block/comments/services/block-handler.ts b/src/addons/block/comments/services/block-handler.ts
index 8a77ac7a4..42b4d72c0 100644
--- a/src/addons/block/comments/services/block-handler.ts
+++ b/src/addons/block/comments/services/block-handler.ts
@@ -19,6 +19,7 @@ import { CoreBlockBaseHandler } from '@features/block/classes/base-block-handler
 import { CoreCourseBlock } from '@features/course/services/course';
 import { makeSingleton } from '@singletons';
 import { CoreComments } from '@features/comments/services/comments';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -44,7 +45,7 @@ export class AddonBlockCommentsHandlerService extends CoreBlockBaseHandler {
      * @param instanceId The instance ID associated with the context level.
      * @returns Data or promise resolved with the data.
      */
-    getDisplayData(block: CoreCourseBlock, contextLevel: string, instanceId: number): CoreBlockHandlerData {
+    getDisplayData(block: CoreCourseBlock, contextLevel: ContextLevel, instanceId: number): CoreBlockHandlerData {
         return {
             title: 'addon.block_comments.pluginname',
             class: 'addon-block-comments',
diff --git a/src/addons/block/completionstatus/services/block-handler.ts b/src/addons/block/completionstatus/services/block-handler.ts
index 13cf265c8..6039f1054 100644
--- a/src/addons/block/completionstatus/services/block-handler.ts
+++ b/src/addons/block/completionstatus/services/block-handler.ts
@@ -19,6 +19,7 @@ import { CoreBlockBaseHandler } from '@features/block/classes/base-block-handler
 import { CoreCourseBlock } from '@features/course/services/course';
 import { makeSingleton } from '@singletons';
 import { AddonCourseCompletion } from '@addons/coursecompletion/services/coursecompletion';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -41,7 +42,7 @@ export class AddonBlockCompletionStatusHandlerService extends CoreBlockBaseHandl
      */
     async getDisplayData(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): Promise<undefined | CoreBlockHandlerData> {
         if (contextLevel !== 'course') {
diff --git a/src/addons/block/globalsearch/services/block-handler.ts b/src/addons/block/globalsearch/services/block-handler.ts
index d338a2777..5938bbaa1 100644
--- a/src/addons/block/globalsearch/services/block-handler.ts
+++ b/src/addons/block/globalsearch/services/block-handler.ts
@@ -20,6 +20,7 @@ import { makeSingleton } from '@singletons';
 import { CoreCourseBlock } from '@features/course/services/course';
 import { CORE_SEARCH_PAGE_NAME } from '@features/search/services/handlers/mainmenu';
 import { CoreSearchGlobalSearch } from '@features/search/services/global-search';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -40,8 +41,8 @@ export class AddonBlockGlobalSearchHandlerService extends CoreBlockBaseHandler {
     /**
      * @inheritdoc
      */
-    getDisplayData(block: CoreCourseBlock, contextLevel: string, instanceId: number): CoreBlockHandlerData | undefined {
-        const isCourseSearch = contextLevel === 'course';
+    getDisplayData(block: CoreCourseBlock, contextLevel: ContextLevel, instanceId: number): CoreBlockHandlerData | undefined {
+        const isCourseSearch = contextLevel === ContextLevel.COURSE;
 
         return {
             title: isCourseSearch ? 'core.search' : 'addon.block_globalsearch.pluginname',
diff --git a/src/addons/block/searchforums/services/block-handler.ts b/src/addons/block/searchforums/services/block-handler.ts
index b1425a34d..e05a03cb6 100644
--- a/src/addons/block/searchforums/services/block-handler.ts
+++ b/src/addons/block/searchforums/services/block-handler.ts
@@ -20,6 +20,7 @@ import { makeSingleton } from '@singletons';
 import { ADDON_MOD_FORUM_SEARCH_PAGE_NAME } from '@addons/mod/forum/constants';
 import { CoreCourseBlock } from '@features/course/services/course';
 import { CoreSearchGlobalSearch } from '@features/search/services/global-search';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -42,10 +43,10 @@ export class AddonBlockSearchForumsHandlerService extends CoreBlockBaseHandler {
      */
     async getDisplayData(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): Promise<undefined | CoreBlockHandlerData> {
-        if (contextLevel !== 'course') {
+        if (contextLevel !== ContextLevel.COURSE) {
             return;
         }
 
diff --git a/src/addons/block/selfcompletion/services/block-handler.ts b/src/addons/block/selfcompletion/services/block-handler.ts
index 2d82fe4c0..d0b0b0b2e 100644
--- a/src/addons/block/selfcompletion/services/block-handler.ts
+++ b/src/addons/block/selfcompletion/services/block-handler.ts
@@ -19,6 +19,7 @@ import { CoreBlockBaseHandler } from '@features/block/classes/base-block-handler
 import { CoreCourseBlock } from '@features/course/services/course';
 import { makeSingleton } from '@singletons';
 import { AddonCourseCompletion } from '@addons/coursecompletion/services/coursecompletion';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Block handler.
@@ -41,10 +42,10 @@ export class AddonBlockSelfCompletionHandlerService extends CoreBlockBaseHandler
      */
     async getDisplayData(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): Promise<undefined | CoreBlockHandlerData> {
-        if (contextLevel !== 'course') {
+        if (contextLevel !== ContextLevel.COURSE) {
             return;
         }
 
diff --git a/src/addons/blog/pages/entries/entries.ts b/src/addons/blog/pages/entries/entries.ts
index 3441163a0..57527c2a9 100644
--- a/src/addons/blog/pages/entries/entries.ts
+++ b/src/addons/blog/pages/entries/entries.ts
@@ -273,7 +273,7 @@ export class AddonBlogEntriesPage implements OnInit {
      */
     refresh(refresher?: HTMLIonRefresherElement): void {
         const promises = this.entries.map((entry) =>
-            CoreComments.invalidateCommentsData('user', entry.userid, this.component, entry.id, 'format_blog'));
+            CoreComments.invalidateCommentsData(ContextLevel.USER, entry.userid, this.component, entry.id, 'format_blog'));
 
         promises.push(AddonBlog.invalidateEntries(this.filter));
 
@@ -304,6 +304,6 @@ export class AddonBlogEntriesPage implements OnInit {
 type AddonBlogPostFormatted = AddonBlogPost & {
     publishTranslated?: string; // Calculated in the app. Key of the string to translate the publish state of the post.
     user?: CoreUserProfile; // Calculated in the app. Data of the user that wrote the post.
-    contextLevel?: string; // Calculated in the app. The context level of the entry.
+    contextLevel?: ContextLevel; // Calculated in the app. The context level of the entry.
     contextInstanceId?: number; // Calculated in the app. The context instance id.
 };
diff --git a/src/addons/calendar/pages/edit-event/edit-event.ts b/src/addons/calendar/pages/edit-event/edit-event.ts
index f95dec762..a48ff91e7 100644
--- a/src/addons/calendar/pages/edit-event/edit-event.ts
+++ b/src/addons/calendar/pages/edit-event/edit-event.ts
@@ -46,6 +46,7 @@ import { CoreReminders, CoreRemindersService, CoreRemindersUnits } from '@featur
 import { CoreRemindersSetReminderMenuComponent } from '@features/reminders/components/set-reminder-menu/set-reminder-menu';
 import moment from 'moment-timezone';
 import { ADDON_CALENDAR_COMPONENT } from '@addons/calendar/constants';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Page that displays a form to create/edit an event.
@@ -266,7 +267,7 @@ export class AddonCalendarEditEventPage implements OnInit, OnDestroy, CanLeave {
 
         const courseFillFullname = async (course: CoreCourseSearchedData | CoreEnrolledCourseData): Promise<void> => {
             try {
-                const result = await CoreFilterHelper.getFiltersAndFormatText(course.fullname, 'course', course.id);
+                const result = await CoreFilterHelper.getFiltersAndFormatText(course.fullname, ContextLevel.COURSE, course.id);
                 course.fullname = result.text;
             } catch {
                 // Ignore errors.
diff --git a/src/addons/competency/pages/competencies/competencies.page.ts b/src/addons/competency/pages/competencies/competencies.page.ts
index 9a3f1750b..023fc647d 100644
--- a/src/addons/competency/pages/competencies/competencies.page.ts
+++ b/src/addons/competency/pages/competencies/competencies.page.ts
@@ -48,7 +48,7 @@ export class AddonCompetencyCompetenciesPage implements AfterViewInit, OnDestroy
     >;
 
     title = '';
-    contextLevel?: string;
+    contextLevel?: ContextLevel;
     contextInstanceId?: number;
 
     protected logView: () => void;
diff --git a/src/addons/competency/pages/competency/competency.page.ts b/src/addons/competency/pages/competency/competency.page.ts
index 8273d4428..c40a22c13 100644
--- a/src/addons/competency/pages/competency/competency.page.ts
+++ b/src/addons/competency/pages/competency/competency.page.ts
@@ -58,7 +58,7 @@ export class AddonCompetencyCompetencyPage implements OnInit, OnDestroy {
     user?: CoreUserSummary;
     competency?: AddonCompetencyDataForUserCompetencySummaryWSResponse;
     userCompetency?: AddonCompetencyUserCompetencyPlan | AddonCompetencyUserCompetency | AddonCompetencyUserCompetencyCourse;
-    contextLevel?: string;
+    contextLevel?: ContextLevel;
     contextInstanceId?: number;
 
     protected logView: () => void;
diff --git a/src/addons/mod/assign/feedback/comments/component/comments.ts b/src/addons/mod/assign/feedback/comments/component/comments.ts
index c5f268f23..7113410cb 100644
--- a/src/addons/mod/assign/feedback/comments/component/comments.ts
+++ b/src/addons/mod/assign/feedback/comments/component/comments.ts
@@ -25,6 +25,7 @@ import { AddonModAssignFeedbackDelegate } from '@addons/mod/assign/services/feed
 import { AddonModAssignOffline } from '@addons/mod/assign/services/assign-offline';
 import { CoreUtils } from '@services/utils/utils';
 import { AddonModAssignFeedbackPluginBaseComponent } from '@addons/mod/assign/classes/base-feedback-plugin-component';
+import { ContextLevel } from '@/core/constants';
 /**
  * Component to render a comments feedback plugin.
  */
@@ -69,7 +70,7 @@ export class AddonModAssignFeedbackCommentsComponent extends AddonModAssignFeedb
                             component: this.component,
                             componentId: this.assign.cmid,
                             filter: true,
-                            contextLevel: 'module',
+                            contextLevel: ContextLevel.MODULE,
                             instanceId: this.assign.cmid,
                             courseId: this.assign.course,
                         });
diff --git a/src/addons/mod/assign/services/assign.ts b/src/addons/mod/assign/services/assign.ts
index 413b4ac26..a0bd72252 100644
--- a/src/addons/mod/assign/services/assign.ts
+++ b/src/addons/mod/assign/services/assign.ts
@@ -36,6 +36,7 @@ import { CoreFormFields } from '@singletons/form';
 import { CoreFileHelper } from '@services/file-helper';
 import { CoreIonicColorNames } from '@singletons/colors';
 import { CoreSiteWSPreSets } from '@classes/sites/authenticated-site';
+import { ContextLevel } from '@/core/constants';
 
 const ROOT_CACHE_KEY = 'mmaModAssign:';
 
@@ -757,7 +758,7 @@ export class AddonModAssignProvider {
         promises.push(this.invalidateAssignmentUserMappingsData(assign.id, siteId));
         promises.push(this.invalidateAssignmentGradesData(assign.id, siteId));
         promises.push(this.invalidateListParticipantsData(assign.id, siteId));
-        promises.push(CoreComments.invalidateCommentsByInstance('module', assign.id, siteId));
+        promises.push(CoreComments.invalidateCommentsByInstance(ContextLevel.MODULE, assign.id, siteId));
         promises.push(this.invalidateAssignmentData(courseId, siteId));
         promises.push(CoreGrades.invalidateAllCourseGradesData(courseId));
 
diff --git a/src/addons/mod/assign/submission/comments/component/comments.ts b/src/addons/mod/assign/submission/comments/component/comments.ts
index 46cfe5861..099073d25 100644
--- a/src/addons/mod/assign/submission/comments/component/comments.ts
+++ b/src/addons/mod/assign/submission/comments/component/comments.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { AddonModAssignSubmissionPluginBaseComponent } from '@addons/mod/assign/classes/base-submission-plugin-component';
 import { Component, ViewChild } from '@angular/core';
 import { CoreCommentsCommentsComponent } from '@features/comments/components/comments/comments';
@@ -43,7 +44,7 @@ export class AddonModAssignSubmissionCommentsComponent extends AddonModAssignSub
      */
     invalidate(): Promise<void> {
         return CoreComments.invalidateCommentsData(
-            'module',
+            ContextLevel.MODULE,
             this.assign.cmid,
             'assignsubmission_comments',
             this.submission.id,
diff --git a/src/addons/mod/assign/submission/comments/services/handler.ts b/src/addons/mod/assign/submission/comments/services/handler.ts
index 3bb5a0162..97aa9a4b9 100644
--- a/src/addons/mod/assign/submission/comments/services/handler.ts
+++ b/src/addons/mod/assign/submission/comments/services/handler.ts
@@ -19,6 +19,7 @@ import { Injectable, Type } from '@angular/core';
 import { CoreComments } from '@features/comments/services/comments';
 import { makeSingleton } from '@singletons';
 import { AddonModAssignSubmissionCommentsComponent } from '../component/comments';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Handler for comments submission plugin.
@@ -68,7 +69,7 @@ export class AddonModAssignSubmissionCommentsHandlerService implements AddonModA
         siteId?: string,
     ): Promise<void> {
         await CoreComments.getComments(
-            'module',
+            ContextLevel.MODULE,
             assign.cmid,
             'assignsubmission_comments',
             submission.id,
diff --git a/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts b/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
index f91d185c9..942c45518 100644
--- a/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
+++ b/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
@@ -21,6 +21,7 @@ import { CoreSites } from '@services/sites';
 import { CoreTextUtils } from '@services/utils/text';
 import { CoreUtils } from '@services/utils/utils';
 import { AddonModAssignSubmissionOnlineTextPluginData } from '../services/handler';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to render an onlinetext submission plugin.
@@ -86,7 +87,7 @@ export class AddonModAssignSubmissionOnlineTextComponent extends AddonModAssignS
                             component: this.component,
                             componentId: this.assign.cmid,
                             filter: true,
-                            contextLevel: 'module',
+                            contextLevel: ContextLevel.MODULE,
                             instanceId: this.assign.cmid,
                             courseId: this.assign.course,
                         });
diff --git a/src/addons/mod/data/services/handlers/prefetch.ts b/src/addons/mod/data/services/handlers/prefetch.ts
index c8a33a75c..d34fa7123 100644
--- a/src/addons/mod/data/services/handlers/prefetch.ts
+++ b/src/addons/mod/data/services/handlers/prefetch.ts
@@ -26,6 +26,7 @@ import { CoreWSFile } from '@services/ws';
 import { makeSingleton } from '@singletons';
 import { AddonModDataProvider, AddonModDataEntry, AddonModData, AddonModDataData } from '../data';
 import { AddonModDataSync, AddonModDataSyncResult } from '../data-sync';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Handler to prefetch databases.
@@ -249,7 +250,7 @@ export class AddonModDataPrefetchHandlerService extends CoreCourseActivityPrefet
 
             if (commentsEnabled && database.comments) {
                 promises.push(CoreComments.getComments(
-                    'module',
+                    ContextLevel.MODULE,
                     database.coursemodule,
                     'mod_data',
                     entry.id,
diff --git a/src/addons/mod/glossary/components/index/index.ts b/src/addons/mod/glossary/components/index/index.ts
index 56f5c4b87..a7dcd26ab 100644
--- a/src/addons/mod/glossary/components/index/index.ts
+++ b/src/addons/mod/glossary/components/index/index.ts
@@ -170,15 +170,25 @@ export class AddonModGlossaryIndexComponent extends CoreCourseModuleMainActivity
 
         // Listen for offline ratings saved and synced.
         this.observers.push(CoreEvents.on(CoreRatingProvider.RATING_SAVED_EVENT, (data) => {
-            if (this.glossary && data.component == 'mod_glossary' && data.ratingArea == 'entry' && data.contextLevel == 'module'
-                    && data.instanceId == this.glossary.coursemodule) {
+            if (
+                this.glossary &&
+                data.component == 'mod_glossary' &&
+                data.ratingArea == 'entry' &&
+                data.contextLevel == ContextLevel.MODULE &&
+                data.instanceId == this.glossary.coursemodule
+            ) {
                 this.hasOfflineRatings = true;
                 this.hasOffline = true;
             }
         }));
         this.observers.push(CoreEvents.on(CoreRatingSyncProvider.SYNCED_EVENT, (data) => {
-            if (this.glossary && data.component == 'mod_glossary' && data.ratingArea == 'entry' && data.contextLevel == 'module'
-                    && data.instanceId == this.glossary.coursemodule) {
+            if (
+                this.glossary &&
+                data.component == 'mod_glossary' &&
+                data.ratingArea == 'entry' &&
+                data.contextLevel == ContextLevel.MODULE &&
+                data.instanceId == this.glossary.coursemodule
+            ) {
                 this.hasOfflineRatings = false;
                 this.hasOffline = this.hasOfflineEntries;
             }
diff --git a/src/addons/mod/glossary/services/handlers/prefetch.ts b/src/addons/mod/glossary/services/handlers/prefetch.ts
index 08690f68c..713f56d83 100644
--- a/src/addons/mod/glossary/services/handlers/prefetch.ts
+++ b/src/addons/mod/glossary/services/handlers/prefetch.ts
@@ -25,6 +25,7 @@ import { CoreWSFile } from '@services/ws';
 import { makeSingleton } from '@singletons';
 import { AddonModGlossary, AddonModGlossaryEntry, AddonModGlossaryGlossary, AddonModGlossaryProvider } from '../glossary';
 import { AddonModGlossarySync, AddonModGlossarySyncResult } from '../glossary-sync';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Handler to prefetch forums.
@@ -161,7 +162,7 @@ export class AddonModGlossaryPrefetchHandlerService extends CoreCourseActivityPr
                 // Don't fetch individual entries, it's too many WS calls.
                 if (glossary.allowcomments && commentsEnabled) {
                     promises.push(CoreComments.getComments(
-                        'module',
+                        ContextLevel.MODULE,
                         glossary.coursemodule,
                         'mod_glossary',
                         entry.id,
diff --git a/src/addons/privatefiles/services/privatefiles.ts b/src/addons/privatefiles/services/privatefiles.ts
index 3d5e4797d..c638bda9c 100644
--- a/src/addons/privatefiles/services/privatefiles.ts
+++ b/src/addons/privatefiles/services/privatefiles.ts
@@ -19,6 +19,7 @@ import { CoreMimetypeUtils } from '@services/utils/mimetype';
 import { CoreWSExternalWarning } from '@services/ws';
 import { CoreSite } from '@classes/sites/site';
 import { makeSingleton } from '@singletons';
+import { ContextLevel } from '@/core/constants';
 
 const ROOT_CACHE_KEY = 'mmaFiles:';
 
@@ -136,7 +137,7 @@ export class AddonPrivateFilesProvider {
             contextid: -1,
             component: 'user',
             filearea: 'private',
-            contextlevel: 'user',
+            contextlevel: ContextLevel.USER,
             instanceid: CoreSites.getCurrentSite()?.getUserId(),
             itemid: 0,
             filepath: '',
@@ -428,7 +429,7 @@ export type AddonPrivateFilesGetFilesWSParams = {
     filepath: string; // File path.
     filename: string; // File name.
     modified?: number; // Timestamp to return files changed after this time.
-    contextlevel?: string; // The context level for the file location.
+    contextlevel?: ContextLevel; // The context level for the file location.
     instanceid?: number; // The instance id for where the file is located.
 };
 
diff --git a/src/addons/qbehaviour/deferredcbm/component/deferredcbm.ts b/src/addons/qbehaviour/deferredcbm/component/deferredcbm.ts
index 4656beb62..ab931d06a 100644
--- a/src/addons/qbehaviour/deferredcbm/component/deferredcbm.ts
+++ b/src/addons/qbehaviour/deferredcbm/component/deferredcbm.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input, Output, EventEmitter } from '@angular/core';
 
 import { CoreQuestionBehaviourButton, CoreQuestionQuestion } from '@features/question/services/question-helper';
@@ -30,7 +31,7 @@ export class AddonQbehaviourDeferredCBMComponent {
     @Input() componentId?: number; // ID of the component the question belongs to.
     @Input() attemptId?: number; // Attempt ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the question belongs to (if any). It can be used to improve performance with filters.
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/addons/qbehaviour/informationitem/component/informationitem.ts b/src/addons/qbehaviour/informationitem/component/informationitem.ts
index 995bbe28c..f3a6a64a2 100644
--- a/src/addons/qbehaviour/informationitem/component/informationitem.ts
+++ b/src/addons/qbehaviour/informationitem/component/informationitem.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input, Output, EventEmitter } from '@angular/core';
 
 import { CoreQuestionBehaviourButton, CoreQuestionQuestion } from '@features/question/services/question-helper';
@@ -30,7 +31,7 @@ export class AddonQbehaviourInformationItemComponent {
     @Input() componentId?: number; // ID of the component the question belongs to.
     @Input() attemptId?: number; // Attempt ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the question belongs to (if any). It can be used to improve performance with filters.
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/core/components/chart/chart.ts b/src/core/components/chart/chart.ts
index 8643f8285..dd566186d 100644
--- a/src/core/components/chart/chart.ts
+++ b/src/core/components/chart/chart.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input, OnDestroy, OnInit, ElementRef, OnChanges, ViewChild, SimpleChange } from '@angular/core';
 import { CoreFilter } from '@features/filter/services/filter';
 import { CoreFilterHelper } from '@features/filter/services/filter-helper';
@@ -50,7 +51,7 @@ export class CoreChartComponent implements OnDestroy, OnInit, OnChanges {
     @Input() legend?: ChartLegendOptions; // Legend options.
     @Input() height = 300; // Height of the chart element.
     @Input() filter?: boolean | string; // Whether to filter labels. If not defined, true if contextLevel and instanceId are set.
-    @Input() contextLevel?: string; // The context level of the text.
+    @Input() contextLevel?: ContextLevel; // The context level of the text.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
     @Input() wsNotFiltered?: boolean | string; // If true it means the WS didn't filter the labels for some reason.
diff --git a/src/core/components/navigation-bar/navigation-bar.ts b/src/core/components/navigation-bar/navigation-bar.ts
index 67b072824..5c1d54737 100644
--- a/src/core/components/navigation-bar/navigation-bar.ts
+++ b/src/core/components/navigation-bar/navigation-bar.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, EventEmitter, Input, OnChanges, Output, SimpleChange } from '@angular/core';
 import { Translate } from '@singletons';
 
@@ -36,7 +37,7 @@ export class CoreNavigationBarComponent implements OnChanges {
     @Input() nextTranslate = 'core.next'; // Next translatable text, can admit $a variable.
     @Input() component?: string; // Component the bar belongs to.
     @Input() componentId?: number; // Component ID.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
 
diff --git a/src/core/directives/format-text.ts b/src/core/directives/format-text.ts
index 80355890d..fbdf733ae 100644
--- a/src/core/directives/format-text.ts
+++ b/src/core/directives/format-text.ts
@@ -55,6 +55,7 @@ import { MediaElementController } from '@classes/element-controllers/MediaElemen
 import { FrameElement, FrameElementController } from '@classes/element-controllers/FrameElementController';
 import { CoreUrl } from '@singletons/url';
 import { CoreIcons } from '@singletons/icons';
+import { ContextLevel } from '../constants';
 
 /**
  * Directive to format text rendered. It renders the HTML and treats all links and media, using CoreLinkDirective
@@ -81,7 +82,7 @@ export class CoreFormatTextDirective implements OnChanges, OnDestroy, AsyncDirec
     @Input() singleLine?: boolean | string; // Whether new lines should be removed (all text in single line). Only if clean=true.
     @Input() highlight?: string; // Text to highlight.
     @Input() filter?: boolean | string; // Whether to filter the text. If not defined, true if contextLevel and instanceId are set.
-    @Input() contextLevel?: string; // The context level of the text.
+    @Input() contextLevel?: ContextLevel; // The context level of the text.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
     @Input() wsNotFiltered?: boolean | string; // If true it means the WS didn't filter the text for some reason.
@@ -397,11 +398,13 @@ export class CoreFormatTextDirective implements OnChanges, OnDestroy, AsyncDirec
 
         const siteId = site?.getId();
 
-        if (site && this.contextLevel == 'course' && this.contextInstanceId !== undefined && this.contextInstanceId <= 0) {
+        if (
+            site && this.contextLevel === ContextLevel.COURSE && this.contextInstanceId !== undefined && this.contextInstanceId <= 0
+        ) {
             this.contextInstanceId = site.getSiteHomeId();
         }
 
-        if (this.contextLevel === 'course' && this.contextInstanceId === undefined && this.courseId !== undefined) {
+        if (this.contextLevel === ContextLevel.COURSE && this.contextInstanceId === undefined && this.courseId !== undefined) {
             this.contextInstanceId = this.courseId;
         }
 
@@ -422,7 +425,7 @@ export class CoreFormatTextDirective implements OnChanges, OnDestroy, AsyncDirec
         if (filter) {
             const filterResult = await CoreFilterHelper.getFiltersAndFormatText(
                 this.text || '',
-                this.contextLevel || '',
+                this.contextLevel || ContextLevel.SYSTEM,
                 this.contextInstanceId ?? -1,
                 options,
                 siteId,
diff --git a/src/core/directives/tests/format-text.test.ts b/src/core/directives/tests/format-text.test.ts
index 34c08c18b..e041ea7ce 100644
--- a/src/core/directives/tests/format-text.test.ts
+++ b/src/core/directives/tests/format-text.test.ts
@@ -26,6 +26,7 @@ import { CoreSites } from '@services/sites';
 import { CoreUtils } from '@services/utils/utils';
 
 import { mock, mockSingleton, RenderConfig, renderTemplate, renderWrapperComponent } from '@/testing/utils';
+import { ContextLevel } from '@/core/constants';
 
 describe('CoreFormatTextDirective', () => {
 
@@ -120,7 +121,7 @@ describe('CoreFormatTextDirective', () => {
         expect(CoreFilterHelper.getFiltersAndFormatText).toHaveBeenCalledTimes(1);
         expect(CoreFilterHelper.getFiltersAndFormatText).toHaveBeenCalledWith(
             'Lorem ipsum dolor',
-            'course',
+            ContextLevel.COURSE,
             42,
             expect.anything(),
             undefined,
diff --git a/src/core/features/block/classes/base-block-handler.ts b/src/core/features/block/classes/base-block-handler.ts
index 828ae2f1d..289ad0416 100644
--- a/src/core/features/block/classes/base-block-handler.ts
+++ b/src/core/features/block/classes/base-block-handler.ts
@@ -14,6 +14,7 @@
 
 import { CoreCourseBlock } from '@features/course/services/course';
 import { CoreBlockHandler, CoreBlockHandlerData } from '../services/block-delegate';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Base handler for blocks.
@@ -45,7 +46,7 @@ export class CoreBlockBaseHandler implements CoreBlockHandler {
      */
     getDisplayData(
         block: CoreCourseBlock, // eslint-disable-line @typescript-eslint/no-unused-vars
-        contextLevel: string, // eslint-disable-line @typescript-eslint/no-unused-vars
+        contextLevel: ContextLevel, // eslint-disable-line @typescript-eslint/no-unused-vars
         instanceId: number, // eslint-disable-line @typescript-eslint/no-unused-vars
     ): undefined | CoreBlockHandlerData | Promise<undefined | CoreBlockHandlerData> {
         // To be overridden.
diff --git a/src/core/features/block/components/block/block.ts b/src/core/features/block/components/block/block.ts
index b505f6937..a89f4ee09 100644
--- a/src/core/features/block/components/block/block.ts
+++ b/src/core/features/block/components/block/block.ts
@@ -18,6 +18,7 @@ import { CoreDynamicComponent } from '@components/dynamic-component/dynamic-comp
 import { Subscription } from 'rxjs';
 import { CoreCourseBlock } from '@/core/features/course/services/course';
 import type { ICoreBlockComponent } from '@features/block/classes/base-block-component';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to render a block.
@@ -32,7 +33,7 @@ export class CoreBlockComponent implements OnChanges, OnDestroy {
     @ViewChild(CoreDynamicComponent) dynamicComponent?: CoreDynamicComponent<ICoreBlockComponent>;
 
     @Input() block!: CoreCourseBlock; // The block to render.
-    @Input() contextLevel!: string; // The context where the block will be used.
+    @Input() contextLevel!: ContextLevel; // The context where the block will be used.
     @Input() instanceId!: number; // The instance ID associated with the context level.
     @Input() extraData!: Record<string, unknown>; // Any extra data to be passed to the block.
     @Input() labelledBy?: string;
diff --git a/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts b/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
index bb7931eac..09212a5ab 100644
--- a/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
+++ b/src/core/features/block/components/pre-rendered-block/pre-rendered-block.ts
@@ -14,6 +14,7 @@
 
 import { OnInit, Component, HostBinding } from '@angular/core';
 import { CoreBlockBaseComponent } from '../../classes/base-block-component';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to render blocks with pre-rendered HTML.
@@ -36,7 +37,7 @@ export class CoreBlockPreRenderedComponent extends CoreBlockBaseComponent implem
      * @inheritdoc
      */
     async ngOnInit(): Promise<void> {
-        this.courseId = this.contextLevel == 'course' ? this.instanceId : undefined;
+        this.courseId = this.contextLevel === ContextLevel.COURSE ? this.instanceId : undefined;
         this.fetchContentDefaultError = 'Error getting ' + this.block.contents?.title + ' data.';
         this.id = `block-${this.block.instanceid}`;
 
diff --git a/src/core/features/block/components/side-blocks-button/side-blocks-button.ts b/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
index 0290aa29e..69ae1e0ac 100644
--- a/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
+++ b/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
@@ -20,6 +20,7 @@ import { CoreDomUtils } from '@services/utils/dom';
 import { CoreDom } from '@singletons/dom';
 import { CoreBlockSideBlocksTourComponent } from '../side-blocks-tour/side-blocks-tour';
 import { CoreBlockSideBlocksComponent } from '../side-blocks/side-blocks';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component that displays a button to open blocks.
@@ -31,7 +32,7 @@ import { CoreBlockSideBlocksComponent } from '../side-blocks/side-blocks';
 })
 export class CoreBlockSideBlocksButtonComponent implements OnInit, OnDestroy {
 
-    @Input() contextLevel!: string;
+    @Input() contextLevel!: ContextLevel;
     @Input() instanceId!: number;
     @Input() myDashboardPage?: string;
 
diff --git a/src/core/features/block/components/side-blocks/side-blocks.ts b/src/core/features/block/components/side-blocks/side-blocks.ts
index 5a317c800..e80b9a3b6 100644
--- a/src/core/features/block/components/side-blocks/side-blocks.ts
+++ b/src/core/features/block/components/side-blocks/side-blocks.ts
@@ -22,6 +22,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { CoreCoursesDashboard } from '@features/courses/services/dashboard';
 import { CoreTextUtils } from '@services/utils/text';
 import { CoreDom } from '@singletons/dom';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component that displays the list of side blocks.
@@ -33,7 +34,7 @@ import { CoreDom } from '@singletons/dom';
 })
 export class CoreBlockSideBlocksComponent implements OnInit {
 
-    @Input() contextLevel!: string;
+    @Input() contextLevel!: ContextLevel;
     @Input() instanceId!: number;
     @Input() initialBlockInstanceId?: number;
     @Input() myDashboardPage?: string;
@@ -64,7 +65,7 @@ export class CoreBlockSideBlocksComponent implements OnInit {
     async invalidateBlocks(): Promise<void> {
         const promises: Promise<void>[] = [];
 
-        if (this.contextLevel === 'course') {
+        if (this.contextLevel === ContextLevel.COURSE) {
             promises.push(CoreCourse.invalidateCourseBlocks(this.instanceId));
         } else {
             promises.push(CoreCoursesDashboard.invalidateDashboardBlocks());
@@ -87,7 +88,7 @@ export class CoreBlockSideBlocksComponent implements OnInit {
      */
     async loadContent(): Promise<void> {
         try {
-            if (this.contextLevel === 'course') {
+            if (this.contextLevel === ContextLevel.COURSE) {
                 this.blocks = await CoreBlockHelper.getCourseBlocks(this.instanceId);
             } else {
                 const blocks = await CoreCoursesDashboard.getDashboardBlocks(undefined, undefined, this.myDashboardPage);
diff --git a/src/core/features/block/services/block-delegate.ts b/src/core/features/block/services/block-delegate.ts
index ed4de1719..95501d612 100644
--- a/src/core/features/block/services/block-delegate.ts
+++ b/src/core/features/block/services/block-delegate.ts
@@ -23,6 +23,7 @@ import { makeSingleton } from '@singletons';
 import { CoreBlockDefaultHandler } from './handlers/default-block';
 import { CoreNavigationOptions } from '@services/navigator';
 import type { ICoreBlockComponent } from '@features/block/classes/base-block-component';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Interface that all blocks must implement.
@@ -43,7 +44,7 @@ export interface CoreBlockHandler extends CoreDelegateHandler {
      */
     getDisplayData?(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): undefined | CoreBlockHandlerData | Promise<undefined | CoreBlockHandlerData>;
 }
@@ -162,7 +163,7 @@ export class CoreBlockDelegateService extends CoreDelegate<CoreBlockHandler> {
      */
     async getBlockDisplayData(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): Promise<CoreBlockHandlerData | undefined> {
         return this.executeFunctionOnEnabled(
diff --git a/src/core/features/comments/services/comments-offline.ts b/src/core/features/comments/services/comments-offline.ts
index 8199163d3..e18901b1d 100644
--- a/src/core/features/comments/services/comments-offline.ts
+++ b/src/core/features/comments/services/comments-offline.ts
@@ -17,6 +17,7 @@ import { CoreSites } from '@services/sites';
 import { CoreTimeUtils } from '@services/utils/time';
 import { makeSingleton } from '@singletons';
 import { COMMENTS_TABLE, COMMENTS_DELETED_TABLE, CoreCommentsDBRecord, CoreCommentsDeletedDBRecord } from './database/comments';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Service to handle offline comments.
@@ -52,7 +53,7 @@ export class CoreCommentsOfflineProvider {
      * @returns Promise resolved with the comments.
      */
     async getComment(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -86,7 +87,7 @@ export class CoreCommentsOfflineProvider {
      * @returns Promise resolved with the comments.
      */
     async getComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -131,7 +132,7 @@ export class CoreCommentsOfflineProvider {
      * @returns Promise resolved with the comments.
      */
     async getDeletedComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -165,7 +166,7 @@ export class CoreCommentsOfflineProvider {
      * @returns Promise resolved if deleted, rejected if failure.
      */
     async removeComment(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -195,7 +196,7 @@ export class CoreCommentsOfflineProvider {
      * @returns Promise resolved if deleted, rejected if failure.
      */
     async removeDeletedComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -227,7 +228,7 @@ export class CoreCommentsOfflineProvider {
      */
     async saveComment(
         content: string,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -265,7 +266,7 @@ export class CoreCommentsOfflineProvider {
      */
     async deleteComment(
         commentId: number,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
diff --git a/src/core/features/comments/services/comments-sync.ts b/src/core/features/comments/services/comments-sync.ts
index 1d37106cd..2aa32d833 100644
--- a/src/core/features/comments/services/comments-sync.ts
+++ b/src/core/features/comments/services/comments-sync.ts
@@ -24,6 +24,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { CoreNetworkError } from '@classes/errors/network-error';
 import { CoreCommentsDBRecord, CoreCommentsDeletedDBRecord } from './database/comments';
 import { CoreSyncResult } from '@services/sync';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Service to sync omments.
@@ -121,7 +122,7 @@ export class CoreCommentsSyncProvider extends CoreSyncBaseProvider<CoreCommentsS
      * @returns Promise resolved when the comments are synced or if they don't need to be synced.
      */
     private async syncCommentsIfNeeded(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -149,7 +150,7 @@ export class CoreCommentsSyncProvider extends CoreSyncBaseProvider<CoreCommentsS
      * @returns Promise resolved if sync is successful, rejected otherwise.
      */
     syncComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -185,7 +186,7 @@ export class CoreCommentsSyncProvider extends CoreSyncBaseProvider<CoreCommentsS
      * @returns Promise resolved if sync is successful, rejected otherwise.
      */
     private async performSyncComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -312,7 +313,13 @@ export class CoreCommentsSyncProvider extends CoreSyncBaseProvider<CoreCommentsS
      * @param area String comment area. Default empty.
      * @returns Sync ID.
      */
-    protected getSyncId(contextLevel: string, instanceId: number, component: string, itemId: number, area: string = ''): string {
+    protected getSyncId(
+        contextLevel: ContextLevel,
+        instanceId: number,
+        component: string,
+        itemId: number,
+        area: string = '',
+    ): string {
         return contextLevel + '#' + instanceId + '#' + component + '#' + itemId + '#' + area;
     }
 
@@ -325,7 +332,7 @@ export type CoreCommentsSyncResult = CoreSyncResult;
  * Data passed to AUTO_SYNCED event.
  */
 export type CoreCommentsSyncAutoSyncData = {
-    contextLevel: string;
+    contextLevel: ContextLevel;
     instanceId: number;
     componentName: string;
     itemId: number;
diff --git a/src/core/features/comments/services/comments.ts b/src/core/features/comments/services/comments.ts
index faf6a8951..3a60b6cdf 100644
--- a/src/core/features/comments/services/comments.ts
+++ b/src/core/features/comments/services/comments.ts
@@ -24,6 +24,7 @@ import { CoreEvents } from '@singletons/events';
 import { CoreCommentsOffline } from './comments-offline';
 import { CoreCommentsSyncAutoSyncData, CoreCommentsSyncProvider } from './comments-sync';
 import { CoreSiteWSPreSets } from '@classes/sites/authenticated-site';
+import { ContextLevel } from '@/core/constants';
 
 const ROOT_CACHE_KEY = 'mmComments:';
 
@@ -80,7 +81,7 @@ export class CoreCommentsProvider {
      */
     async addComment(
         content: string,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -128,7 +129,7 @@ export class CoreCommentsProvider {
      */
     async addCommentOnline(
         content: string,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -318,7 +319,7 @@ export class CoreCommentsProvider {
      */
     async deleteCommentsOnline(
         commentIds: number[],
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -367,7 +368,7 @@ export class CoreCommentsProvider {
      * @returns Cache key.
      */
     protected getCommentsCacheKey(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -383,7 +384,7 @@ export class CoreCommentsProvider {
      * @param instanceId The Instance id of item associated with the context level.
      * @returns Cache key.
      */
-    protected getCommentsPrefixCacheKey(contextLevel: string, instanceId: number): string {
+    protected getCommentsPrefixCacheKey(contextLevel: ContextLevel, instanceId: number): string {
         return ROOT_CACHE_KEY + 'comments:' + contextLevel + ':' + instanceId;
     }
 
@@ -400,7 +401,7 @@ export class CoreCommentsProvider {
      * @returns Promise resolved with the comments.
      */
     async getComments(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -449,7 +450,7 @@ export class CoreCommentsProvider {
      * @returns Comments count with plus sign if needed.
      */
     async getCommentsCount(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -514,7 +515,7 @@ export class CoreCommentsProvider {
      * @returns Promise resolved when the data is invalidated.
      */
     async invalidateCommentsData(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         component: string,
         itemId: number,
@@ -545,7 +546,7 @@ export class CoreCommentsProvider {
      * @param siteId Site ID. If not defined, current site.
      * @returns Promise resolved when the data is invalidated.
      */
-    async invalidateCommentsByInstance(contextLevel: string, instanceId: number, siteId?: string): Promise<void> {
+    async invalidateCommentsByInstance(contextLevel: ContextLevel, instanceId: number, siteId?: string): Promise<void> {
         const site = await CoreSites.getSite(siteId);
 
         await site.invalidateWsCacheForKeyStartingWith(this.getCommentsPrefixCacheKey(contextLevel, instanceId));
@@ -587,7 +588,7 @@ type CoreCommentsAddCommentsWSParams = {
 
 export type CoreCommentsCommentBasicData = {
     id?: number; // Comment ID.
-    contextlevel: string; // Contextlevel system, course, user...
+    contextlevel: ContextLevel; // Contextlevel system, course, user...
     instanceid: number; // The id of item associated with the contextlevel.
     component: string; // Component.
     content: string; // Component.
@@ -628,7 +629,7 @@ type CoreCommentsDeleteCommentsWSParams = {
  * Params of core_comment_get_comments WS.
  */
 type CoreCommentsGetCommentsWSParams = {
-    contextlevel: string; // Contextlevel system, course, user...
+    contextlevel: ContextLevel; // Contextlevel system, course, user...
     instanceid: number; // The Instance id of item associated with the context level.
     component: string; // Component.
     itemid: number; // Associated id.
@@ -652,7 +653,7 @@ export type CoreCommentsGetCommentsWSResponse = {
  * Data sent by COMMENTS_COUNT_CHANGED_EVENT event.
  */
 export type CoreCommentsCountChangedEventData = {
-    contextLevel: string;
+    contextLevel: ContextLevel;
     instanceId: number;
     component: string;
     itemId: number;
@@ -664,7 +665,7 @@ export type CoreCommentsCountChangedEventData = {
  * Data sent by REFRESH_COMMENTS_EVENT event.
  */
 export type CoreCommentsRefreshCommentsEventData = {
-    contextLevel?: string;
+    contextLevel?: ContextLevel;
     instanceId?: number;
     component?: string;
     itemId?: number;
diff --git a/src/core/features/comments/services/database/comments.ts b/src/core/features/comments/services/database/comments.ts
index 38473d69c..ced9204f4 100644
--- a/src/core/features/comments/services/database/comments.ts
+++ b/src/core/features/comments/services/database/comments.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { CoreSiteSchema } from '@services/sites';
 
 /**
@@ -95,7 +96,7 @@ export const COMMENTS_OFFLINE_SITE_SCHEMA: CoreSiteSchema = {
 };
 
 export type CoreCommentsDBRecord = {
-    contextlevel: string; // Primary key.
+    contextlevel: ContextLevel; // Primary key.
     instanceid: number; // Primary key.
     component: string; // Primary key.
     itemid: number; // Primary key.
@@ -106,7 +107,7 @@ export type CoreCommentsDBRecord = {
 
 export type CoreCommentsDeletedDBRecord = {
     commentid: number; // Primary key.
-    contextlevel: string;
+    contextlevel: ContextLevel;
     instanceid: number;
     component: string;
     itemid: number;
diff --git a/src/core/features/course/classes/activity-prefetch-handler.ts b/src/core/features/course/classes/activity-prefetch-handler.ts
index 89dac07fb..d0e7db5f9 100644
--- a/src/core/features/course/classes/activity-prefetch-handler.ts
+++ b/src/core/features/course/classes/activity-prefetch-handler.ts
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { DownloadStatus } from '@/core/constants';
+import { DownloadStatus, ContextLevel } from '@/core/constants';
 import { CoreNetworkError } from '@classes/errors/network-error';
 import { CoreFilterHelper } from '@features/filter/services/filter-helper';
 import { CoreNetwork } from '@services/network';
@@ -118,7 +118,7 @@ export class CoreCourseActivityPrefetchHandlerBase extends CoreCourseModulePrefe
             await Promise.all([
                 CoreCourse.getModuleBasicInfo(module.id, { siteId }),
                 CoreCourse.getModule(module.id, courseId, undefined, false, true, siteId),
-                CoreFilterHelper.getFilters('module', module.id, { courseId }),
+                CoreFilterHelper.getFilters(ContextLevel.MODULE, module.id, { courseId }),
             ]);
 
             // Call the download function.
diff --git a/src/core/features/course/classes/resource-prefetch-handler.ts b/src/core/features/course/classes/resource-prefetch-handler.ts
index 89bcced9a..5632d13b3 100644
--- a/src/core/features/course/classes/resource-prefetch-handler.ts
+++ b/src/core/features/course/classes/resource-prefetch-handler.ts
@@ -21,6 +21,7 @@ import { CoreWSFile } from '@services/ws';
 import { CoreCourse, CoreCourseAnyModuleData } from '../services/course';
 import { CoreCourseModuleData } from '../services/course-helper';
 import { CoreCourseModulePrefetchHandlerBase } from './module-prefetch-handler';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Base prefetch handler to be registered in CoreCourseModulePrefetchDelegate. It is useful to minimize the amount of
@@ -131,7 +132,7 @@ export class CoreCourseResourcePrefetchHandlerBase extends CoreCourseModulePrefe
             ));
         }
 
-        promises.push(CoreFilterHelper.getFilters('module', module.id, { courseId }));
+        promises.push(CoreFilterHelper.getFilters(ContextLevel.MODULE, module.id, { courseId }));
 
         await Promise.all(promises);
     }
diff --git a/src/core/features/course/components/course-format/course-format.ts b/src/core/features/course/components/course-format/course-format.ts
index eb6419702..a7788810a 100644
--- a/src/core/features/course/components/course-format/course-format.ts
+++ b/src/core/features/course/components/course-format/course-format.ts
@@ -52,6 +52,7 @@ import { CoreDom } from '@singletons/dom';
 import { CoreUserTourDirectiveOptions } from '@directives/user-tour';
 import { CoreAnalytics, CoreAnalyticsEventType } from '@services/analytics';
 import { CoreBlockSideBlocksComponent } from '@features/block/components/side-blocks/side-blocks';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to display course contents using a certain format. If the format isn't found, use default one.
@@ -318,7 +319,7 @@ export class CoreCourseFormatComponent implements OnInit, OnChanges, OnDestroy {
             CoreDomUtils.openSideModal({
                 component: CoreBlockSideBlocksComponent,
                 componentProps: {
-                    contextLevel: 'course',
+                    contextLevel: ContextLevel.COURSE,
                     instanceId: this.course.id,
                     initialBlockInstanceId: this.initialBlockInstanceId,
                 },
diff --git a/src/core/features/course/components/module-completion-legacy/module-completion-legacy.ts b/src/core/features/course/components/module-completion-legacy/module-completion-legacy.ts
index aa2c210da..38846e34b 100644
--- a/src/core/features/course/components/module-completion-legacy/module-completion-legacy.ts
+++ b/src/core/features/course/components/module-completion-legacy/module-completion-legacy.ts
@@ -25,6 +25,7 @@ import { CoreCourseModuleCompletionBaseComponent } from '@features/course/classe
 import { CoreCourseHelper } from '@features/course/services/course-helper';
 import { CoreEventObserver, CoreEvents } from '@singletons/events';
 import { BehaviorSubject } from 'rxjs';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to handle activity completion in sites previous to 3.11.
@@ -112,7 +113,7 @@ export class CoreCourseModuleCompletionLegacyComponent extends CoreCourseModuleC
 
         const result = await CoreFilterHelper.getFiltersAndFormatText(
             moduleName,
-            'module',
+            ContextLevel.MODULE,
             this.moduleId,
             { clean: true, singleLine: true, shortenLength: 50, courseId: this.completion.courseId },
         );
diff --git a/src/core/features/course/components/module-description/module-description.ts b/src/core/features/course/components/module-description/module-description.ts
index e914b4f54..d0bb74b58 100644
--- a/src/core/features/course/components/module-description/module-description.ts
+++ b/src/core/features/course/components/module-description/module-description.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, HostBinding, Input } from '@angular/core';
 
 /**
@@ -43,7 +44,7 @@ export class CoreCourseModuleDescriptionComponent {
     @Input() component?: string; // Component for format text directive.
     @Input() componentId?: string | number; // Component ID to use in conjunction with the component.
     @Input() showFull?: string | boolean; // Whether to always display the full description.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
 
diff --git a/src/core/features/course/services/course-helper.ts b/src/core/features/course/services/course-helper.ts
index ea52468c3..13d903779 100644
--- a/src/core/features/course/services/course-helper.ts
+++ b/src/core/features/course/services/course-helper.ts
@@ -28,7 +28,7 @@ import {
     CoreCourseModuleCompletionStatus,
     CoreCourseGetContentsWSModule,
 } from './course';
-import { CoreConstants, DownloadStatus, TDownloadStatus } from '@/core/constants';
+import { CoreConstants, DownloadStatus, TDownloadStatus, ContextLevel } from '@/core/constants';
 import { CoreLogger } from '@singletons/logger';
 import { ApplicationInit, makeSingleton, Translate } from '@singletons';
 import { CoreFilepool } from '@services/filepool';
@@ -1636,7 +1636,7 @@ export class CoreCourseHelperProvider {
                 promises.push(CoreCourse.getActivitiesCompletionStatus(course.id));
             }
 
-            promises.push(CoreFilterHelper.getFilters('course', course.id));
+            promises.push(CoreFilterHelper.getFilters(ContextLevel.COURSE, course.id));
 
             await CoreUtils.allPromises(promises);
 
diff --git a/src/core/features/course/services/module-prefetch-delegate.ts b/src/core/features/course/services/module-prefetch-delegate.ts
index 195b1b75a..094b444bd 100644
--- a/src/core/features/course/services/module-prefetch-delegate.ts
+++ b/src/core/features/course/services/module-prefetch-delegate.ts
@@ -25,7 +25,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { CoreCourse, CoreCourseAnyModuleData, CoreCourseModuleContentFile } from './course';
 import { CoreCache } from '@classes/cache';
 import { CoreSiteWSPreSets } from '@classes/sites/authenticated-site';
-import { DownloadStatus, TDownloadStatus, TDownloadedStatus } from '@/core/constants';
+import { DownloadStatus, TDownloadStatus, TDownloadedStatus, ContextLevel } from '@/core/constants';
 import { CoreDelegate, CoreDelegateHandler } from '@classes/delegate';
 import { makeSingleton } from '@singletons';
 import { CoreEvents, CoreEventSectionStatusChangedData } from '@singletons/events';
@@ -132,7 +132,7 @@ export class CoreCourseModulePrefetchDelegateService extends CoreDelegate<CoreCo
                 if (canUse) {
                     // Can use check updates, add it to the tocheck list.
                     result.toCheck.push({
-                        contextlevel: 'module',
+                        contextlevel: ContextLevel.MODULE,
                         id: module.id,
                         since: data.downloadTime || 0,
                     });
@@ -888,7 +888,7 @@ export class CoreCourseModulePrefetchDelegateService extends CoreDelegate<CoreCo
             courseid: courseId,
             tocheck: [
                 {
-                    contextlevel: 'module',
+                    contextlevel: ContextLevel.MODULE,
                     id: module.id,
                     since: data.downloadTime || 0,
                 },
@@ -1611,7 +1611,7 @@ export type CoreCourseCheckUpdatesWSParams = {
  * Data to send in tocheck parameter.
  */
 type CheckUpdatesToCheckWSParam = {
-    contextlevel: string; // The context level for the file location. Only module supported right now.
+    contextlevel: ContextLevel.MODULE; // The context level for the file location. Only module supported right now.
     id: number; // Context instance id.
     since: number; // Check updates since this time stamp.
 };
diff --git a/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts b/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
index 1ef6e6429..eb92fb0bc 100644
--- a/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
+++ b/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
@@ -44,6 +44,7 @@ import { CoreDom } from '@singletons/dom';
 import { CorePlatform } from '@services/platform';
 import { Swiper } from 'swiper';
 import { SwiperOptions } from 'swiper/types';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Component to display a rich text editor if enabled.
@@ -71,7 +72,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
     @Input() component?: string; // The component to link the files to.
     @Input() componentId?: number; // An ID to use in conjunction with the component.
     @Input() autoSave?: boolean | string; // Whether to auto-save the contents in a draft. Defaults to true.
-    @Input() contextLevel?: string; // The context level of the text.
+    @Input() contextLevel?: ContextLevel; // The context level of the text.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() elementId?: string; // An ID to set to the element.
     @Input() draftExtraParams?: Record<string, unknown>; // Extra params to identify the draft.
@@ -267,7 +268,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
             // Save a draft so the original content is saved.
             this.lastDraft = newValue ?? '';
             CoreEditorOffline.saveDraft(
-                this.contextLevel || '',
+                this.contextLevel || ContextLevel.SYSTEM,
                 this.contextInstanceId || 0,
                 this.elementId || '',
                 this.draftExtraParams || {},
@@ -923,7 +924,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
     protected async restoreDraft(): Promise<void> {
         try {
             const entry = await CoreEditorOffline.resumeDraft(
-                this.contextLevel || '',
+                this.contextLevel || ContextLevel.SYSTEM,
                 this.contextInstanceId || 0,
                 this.elementId || '',
                 this.draftExtraParams || {},
@@ -983,7 +984,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
 
             try {
                 await CoreEditorOffline.saveDraft(
-                    this.contextLevel || '',
+                    this.contextLevel || ContextLevel.SYSTEM,
                     this.contextInstanceId || 0,
                     this.elementId || '',
                     this.draftExtraParams || {},
@@ -1011,7 +1012,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
             if (data.form && form && data.form == form) {
                 try {
                     await CoreEditorOffline.deleteDraft(
-                        this.contextLevel || '',
+                        this.contextLevel || ContextLevel.SYSTEM,
                         this.contextInstanceId || 0,
                         this.elementId || '',
                         this.draftExtraParams || {},
diff --git a/src/core/features/editor/services/database/editor.ts b/src/core/features/editor/services/database/editor.ts
index 1a0eac575..4288ca37f 100644
--- a/src/core/features/editor/services/database/editor.ts
+++ b/src/core/features/editor/services/database/editor.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { CoreSiteSchema } from '@services/sites';
 
 /**
@@ -75,7 +76,7 @@ export const SITE_SCHEMA: CoreSiteSchema = {
  * Primary data to identify a stored draft.
  */
 export type CoreEditorDraftPrimaryData = {
-    contextlevel: string; // Context level.
+    contextlevel: ContextLevel; // Context level.
     contextinstanceid: number; // The instance ID related to the context.
     elementid: string; // Element ID.
     extraparams: string; // Extra params stringified.
diff --git a/src/core/features/editor/services/editor-offline.ts b/src/core/features/editor/services/editor-offline.ts
index a38f507c8..b6a7e912f 100644
--- a/src/core/features/editor/services/editor-offline.ts
+++ b/src/core/features/editor/services/editor-offline.ts
@@ -20,6 +20,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { makeSingleton } from '@singletons';
 import { CoreLogger } from '@singletons/logger';
 import { CoreEditorDraft, CoreEditorDraftPrimaryData, DRAFT_TABLE } from './database/editor';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Service with features regarding rich text editor in offline.
@@ -44,7 +45,7 @@ export class CoreEditorOfflineProvider {
      * @returns Promise resolved when done.
      */
     async deleteDraft(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contextInstanceId: number,
         elementId: string,
         extraParams: Record<string, unknown>,
@@ -71,7 +72,7 @@ export class CoreEditorOfflineProvider {
      * @returns Object with the fixed primary data.
      */
     protected fixDraftPrimaryData(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contextInstanceId: number,
         elementId: string,
         extraParams: Record<string, unknown>,
@@ -96,7 +97,7 @@ export class CoreEditorOfflineProvider {
      * @returns Promise resolved with the draft data. Undefined if no draft stored.
      */
     async getDraft(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contextInstanceId: number,
         elementId: string,
         extraParams: Record<string, unknown>,
@@ -123,7 +124,7 @@ export class CoreEditorOfflineProvider {
      * @returns Promise resolved with the draft data. Undefined if no draft stored.
      */
     async resumeDraft(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contextInstanceId: number,
         elementId: string,
         extraParams: Record<string, unknown>,
@@ -183,7 +184,7 @@ export class CoreEditorOfflineProvider {
      * @returns Promise resolved when done.
      */
     async saveDraft(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contextInstanceId: number,
         elementId: string,
         extraParams: Record<string, unknown>,
diff --git a/src/core/features/filter/services/filter-delegate.ts b/src/core/features/filter/services/filter-delegate.ts
index 0db329b32..29ed0f245 100644
--- a/src/core/features/filter/services/filter-delegate.ts
+++ b/src/core/features/filter/services/filter-delegate.ts
@@ -20,6 +20,7 @@ import { CoreFilterDefaultHandler } from './handlers/default-filter';
 import { CoreDelegate, CoreDelegateHandler } from '@classes/delegate';
 import { CoreSite } from '@classes/sites/site';
 import { makeSingleton } from '@singletons';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Interface that all filter handlers must implement.
@@ -156,7 +157,7 @@ export class CoreFilterDelegateService extends CoreDelegate<CoreFilterHandler> {
      * @param instanceId Instance ID.
      * @returns Filters.
      */
-    getEnabledFilters(contextLevel: string, instanceId: number): CoreFilterFilter[] {
+    getEnabledFilters(contextLevel: ContextLevel, instanceId: number): CoreFilterFilter[] {
         const filters: CoreFilterFilter[] = [];
 
         for (const name in this.enabledHandlers) {
diff --git a/src/core/features/filter/services/filter-helper.ts b/src/core/features/filter/services/filter-helper.ts
index 249cf87f0..a9dff313c 100644
--- a/src/core/features/filter/services/filter-helper.ts
+++ b/src/core/features/filter/services/filter-helper.ts
@@ -32,7 +32,7 @@ import { CoreLogger } from '@singletons/logger';
 import { CoreSite } from '@classes/sites/site';
 import { CoreCourseHelper } from '@features/course/services/course-helper';
 import { firstValueFrom } from 'rxjs';
-import { CoreBlockHelper } from '@features/block/services/block-helper';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Helper service to provide filter functionalities.
@@ -80,7 +80,7 @@ export class CoreFilterHelperProvider {
      * @returns Promise resolved with the filters.
      */
     protected async getCacheableFilters(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         getFilters: () => Promise<CoreFiltersGetAvailableInContextWSParamContext[]>,
         options: CoreFilterFormatTextOptions,
@@ -118,7 +118,7 @@ export class CoreFilterHelperProvider {
 
         courseIds.forEach((courseId) => {
             contexts.push({
-                contextlevel: 'course',
+                contextlevel: ContextLevel.COURSE,
                 instanceid: courseId,
             });
         });
@@ -148,7 +148,7 @@ export class CoreFilterHelperProvider {
                 section.modules.forEach((module) => {
                     if (CoreCourseHelper.canUserViewModule(module, section)) {
                         contexts.push({
-                            contextlevel: 'module',
+                            contextlevel: ContextLevel.MODULE,
                             instanceid: module.id,
                         });
                     }
@@ -171,7 +171,7 @@ export class CoreFilterHelperProvider {
      * @returns Promise resolved with the filters.
      */
     async getFilters(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         options: CoreFilterFormatTextOptions = {},
         siteId?: string,
@@ -201,7 +201,10 @@ export class CoreFilterHelperProvider {
             const courseId = options.courseId;
             let hasFilters = true;
 
-            if (contextLevel == 'system' || (contextLevel == 'course' && instanceId == site.getSiteHomeId())) {
+            if (
+                contextLevel === ContextLevel.SYSTEM ||
+                (contextLevel === ContextLevel.COURSE && instanceId == site.getSiteHomeId())
+            ) {
                 // No need to check the site filters because we're requesting the same context, so we'd do the same twice.
             } else {
                 // Check if site has any filter to treat.
@@ -214,13 +217,13 @@ export class CoreFilterHelperProvider {
 
             options.filter = true;
 
-            if (contextLevel == 'module' && courseId) {
+            if (contextLevel === ContextLevel.MODULE && courseId) {
                 // Get all the modules filters with a single call to decrease the number of WS calls.
                 const getFilters = () => this.getCourseModulesContexts(courseId, siteId);
 
                 return await this.getCacheableFilters(contextLevel, instanceId, getFilters, options, site);
 
-            } else if (contextLevel == 'course') {
+            } else if (contextLevel === ContextLevel.COURSE) {
                 // If enrolled, get all enrolled courses filters with a single call to decrease number of WS calls.
                 const getFilters = () => this.getCourseContexts(instanceId, siteId);
 
@@ -247,7 +250,7 @@ export class CoreFilterHelperProvider {
      */
     async getFiltersAndFormatText(
         text: string,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         options?: CoreFilterFormatTextOptions,
         siteId?: string,
@@ -271,7 +274,7 @@ export class CoreFilterHelperProvider {
      */
     protected getFromMemoryCache(
         courseId: number,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         site: CoreSite,
     ): CoreFilterFilter[] | undefined {
@@ -304,7 +307,7 @@ export class CoreFilterHelperProvider {
         const site = await CoreSites.getSite(siteId);
 
         // Get filters at site level.
-        const filters = await CoreFilter.getAvailableInContext('system', 0, site.getId());
+        const filters = await CoreFilter.getAvailableInContext(ContextLevel.SYSTEM, 0, site.getId());
 
         return CoreFilterDelegate.shouldBeApplied(filters, options, site);
     }
@@ -319,7 +322,7 @@ export class CoreFilterHelperProvider {
      */
     protected storeInMemoryCache(
         courseId: number,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         contexts: CoreFilterClassifiedFilters,
         siteId: string,
     ): void {
diff --git a/src/core/features/filter/services/filter.ts b/src/core/features/filter/services/filter.ts
index 9f75d7fad..ad25ecc29 100644
--- a/src/core/features/filter/services/filter.ts
+++ b/src/core/features/filter/services/filter.ts
@@ -141,7 +141,7 @@ export class CoreFilterProvider {
         }
 
         filters.forEach((filter) => {
-            if (hadSystemContext && filter.contextlevel == 'course' && filter.instanceid == site.getSiteHomeId()) {
+            if (hadSystemContext && filter.contextlevel === ContextLevel.COURSE && filter.instanceid == site.getSiteHomeId()) {
                 if (hadSiteHomeContext) {
                     // We need to return both site home and system. Add site home first.
                     classified[filter.contextlevel][filter.instanceid].push(filter);
@@ -151,7 +151,7 @@ export class CoreFilterProvider {
                 }
 
                 // Simulate the system context based on the inherited data.
-                filter.contextlevel = 'system';
+                filter.contextlevel = ContextLevel.SYSTEM;
                 filter.instanceid = 0;
                 filter.contextid = -1;
                 filter.localstate = filter.inheritedstate;
@@ -172,10 +172,10 @@ export class CoreFilterProvider {
      * @returns Context to use.
      */
     convertContext(
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
         options: {courseId?: number} = {},
-    ): {contextLevel: string; instanceId: number} {
+    ): {contextLevel: ContextLevel; instanceId: number} {
         if (contextLevel === ContextLevel.BLOCK || contextLevel === ContextLevel.USER) {
             // Blocks and users cannot have specific filters, use the parent context instead.
             return options.courseId ?
@@ -321,7 +321,7 @@ export class CoreFilterProvider {
      * @param siteId Site ID. If not defined, current site.
      * @returns Promise resolved with the filters.
      */
-    async getAvailableInContext(contextLevel: string, instanceId: number, siteId?: string): Promise<CoreFilterFilter[]> {
+    async getAvailableInContext(contextLevel: ContextLevel, instanceId: number, siteId?: string): Promise<CoreFilterFilter[]> {
         const result = await this.getAvailableInContexts([{ contextlevel: contextLevel, instanceid: instanceId }], siteId);
 
         return result[contextLevel][instanceId] || [];
@@ -406,7 +406,7 @@ export class CoreFilterProvider {
      * @param siteId Site ID (empty for current site).
      * @returns Promise resolved when the data is invalidated.
      */
-    async invalidateAvailableInContext(contextLevel: string, instanceId: number, siteId?: string): Promise<void> {
+    async invalidateAvailableInContext(contextLevel: ContextLevel, instanceId: number, siteId?: string): Promise<void> {
         await this.invalidateAvailableInContexts([{ contextlevel: contextLevel, instanceid: instanceId }], siteId);
     }
 
@@ -431,7 +431,7 @@ export class CoreFilterProvider {
         for (let i = 0; i < contexts.length; i++) {
             const context = contexts[i];
 
-            if (context.contextlevel != 'system') {
+            if (context.contextlevel !== ContextLevel.SYSTEM) {
                 continue;
             }
 
@@ -439,7 +439,7 @@ export class CoreFilterProvider {
 
             // Use course site home instead. Check if it's already in the list.
             result.hadSiteHomeContext = contexts.some((context) =>
-                context.contextlevel == 'course' && context.instanceid == site.getSiteHomeId());
+                context.contextlevel === ContextLevel.COURSE && context.instanceid == site.getSiteHomeId());
 
             if (result.hadSiteHomeContext) {
                 // Site home is already in list, remove this context from the list.
@@ -447,7 +447,7 @@ export class CoreFilterProvider {
             } else {
                 // Site home not in list, use it instead of system.
                 contexts[i] = {
-                    contextlevel: 'course',
+                    contextlevel: ContextLevel.COURSE,
                     instanceid: site.getSiteHomeId(),
                 };
             }
@@ -494,7 +494,7 @@ export type CoreFiltersGetAvailableInContextWSParams = {
  * Data about a context sent to core_filters_get_available_in_context.
  */
 export type CoreFiltersGetAvailableInContextWSParamContext = {
-    contextlevel: string; // The context level where the filters are: (coursecat, course, module).
+    contextlevel: ContextLevel; // The context level where the filters are: (coursecat, course, module).
     instanceid: number; // The instance id of item associated with the context.
 };
 
@@ -502,7 +502,7 @@ export type CoreFiltersGetAvailableInContextWSParamContext = {
  * Filter object returned by core_filters_get_available_in_context.
  */
 export type CoreFilterFilter = {
-    contextlevel: string; // The context level where the filters are: (coursecat, course, module).
+    contextlevel: ContextLevel; // The context level where the filters are: (coursecat, course, module).
     instanceid: number; // The instance id of item associated with the context.
     contextid: number; // The context id.
     filter: string; // Filter plugin name.
@@ -522,7 +522,7 @@ export type CoreFilterGetAvailableInContextResult = {
  * Options that can be passed to format text.
  */
 export type CoreFilterFormatTextOptions = {
-    contextLevel?: string; // The context level where the text is.
+    contextLevel?: ContextLevel; // The context level where the text is.
     instanceId?: number; // The instance id related to the context.
     clean?: boolean; // If true all HTML will be removed. Default false.
     filter?: boolean; // If true the string will be run through applicable filters as well. Default true.
diff --git a/src/core/features/question/classes/base-question-component.ts b/src/core/features/question/classes/base-question-component.ts
index 8ddefceea..5d1e74c3b 100644
--- a/src/core/features/question/classes/base-question-component.ts
+++ b/src/core/features/question/classes/base-question-component.ts
@@ -23,6 +23,7 @@ import { CoreWSFile } from '@services/ws';
 import { CoreIonicColorNames } from '@singletons/colors';
 import { CoreLogger } from '@singletons/logger';
 import { CoreQuestionBehaviourButton, CoreQuestionHelper, CoreQuestionQuestion } from '../services/question-helper';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Base class for components to render a question.
@@ -37,7 +38,7 @@ export class CoreQuestionBaseComponent<T extends AddonModQuizQuestion = AddonMod
     @Input() componentId?: number; // ID of the component the question belongs to.
     @Input() attemptId?: number; // Attempt ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // The course the question belongs to (if any).
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/core/features/question/components/question/question.ts b/src/core/features/question/components/question/question.ts
index 9d6d349ef..7932bcc1b 100644
--- a/src/core/features/question/components/question/question.ts
+++ b/src/core/features/question/components/question/question.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input, Output, OnInit, EventEmitter, ChangeDetectorRef, Type, ElementRef } from '@angular/core';
 import { AsyncDirective } from '@classes/async-directive';
 import { CorePromisedValue } from '@classes/promised-value';
@@ -41,7 +42,7 @@ export class CoreQuestionComponent implements OnInit, AsyncDirective {
     @Input() attemptId?: number; // Attempt ID.
     @Input() usageId?: number; // Usage ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the question belongs to (if any). It can be used to improve performance with filters.
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/core/features/question/services/question-helper.ts b/src/core/features/question/services/question-helper.ts
index 44e89b3f1..ec9b983d5 100644
--- a/src/core/features/question/services/question-helper.ts
+++ b/src/core/features/question/services/question-helper.ts
@@ -28,6 +28,7 @@ import { CoreQuestion, CoreQuestionProvider, CoreQuestionQuestionParsed, CoreQue
 import { CoreQuestionDelegate } from './question-delegate';
 import { CoreIcons } from '@singletons/icons';
 import { CoreUrlUtils } from '@services/utils/url';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Service with some common functions to handle questions.
@@ -868,7 +869,7 @@ export class CoreQuestionHelperProvider {
         element: HTMLElement,
         component?: string,
         componentId?: number,
-        contextLevel?: string,
+        contextLevel?: ContextLevel,
         contextInstanceId?: number,
         courseId?: number,
     ): void {
diff --git a/src/core/features/sitehome/pages/index/index.ts b/src/core/features/sitehome/pages/index/index.ts
index a869bdbf1..508e2fcc1 100644
--- a/src/core/features/sitehome/pages/index/index.ts
+++ b/src/core/features/sitehome/pages/index/index.ts
@@ -31,6 +31,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { CoreTime } from '@singletons/time';
 import { CoreAnalytics, CoreAnalyticsEventType } from '@services/analytics';
 import { CoreBlockSideBlocksComponent } from '@features/block/components/side-blocks/side-blocks';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Page that displays site home index.
@@ -233,7 +234,7 @@ export class CoreSiteHomeIndexPage implements OnInit, OnDestroy {
             CoreDomUtils.openSideModal({
                 component: CoreBlockSideBlocksComponent,
                 componentProps: {
-                    contextLevel: 'course',
+                    contextLevel: ContextLevel.COURSE,
                     instanceId: this.siteHomeId,
                     initialBlockInstanceId: blockInstanceId,
                 },
diff --git a/src/core/features/siteplugins/classes/handlers/block-handler.ts b/src/core/features/siteplugins/classes/handlers/block-handler.ts
index 34fcb8727..2f77114d6 100644
--- a/src/core/features/siteplugins/classes/handlers/block-handler.ts
+++ b/src/core/features/siteplugins/classes/handlers/block-handler.ts
@@ -23,6 +23,7 @@ import { CoreSitePluginsOnlyTitleBlockComponent } from '@features/siteplugins/co
 import { CoreSitePluginsBlockHandlerData, CoreSitePluginsContent } from '@features/siteplugins/services/siteplugins';
 import { CoreLogger } from '@singletons/logger';
 import { CoreSitePluginsBaseHandler } from './base-handler';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Handler to support a block using a site plugin.
@@ -48,7 +49,7 @@ export class CoreSitePluginsBlockHandler extends CoreSitePluginsBaseHandler impl
      */
     async getDisplayData(
         block: CoreCourseBlock,
-        contextLevel: string,
+        contextLevel: ContextLevel,
         instanceId: number,
     ): Promise<CoreBlockHandlerData> {
         const className = this.handlerSchema.displaydata?.class || 'block_' + block.name;
diff --git a/src/core/features/siteplugins/components/question-behaviour/question-behaviour.ts b/src/core/features/siteplugins/components/question-behaviour/question-behaviour.ts
index 8a288eaa4..8eed77776 100644
--- a/src/core/features/siteplugins/components/question-behaviour/question-behaviour.ts
+++ b/src/core/features/siteplugins/components/question-behaviour/question-behaviour.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
 
 import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
@@ -33,7 +34,7 @@ export class CoreSitePluginsQuestionBehaviourComponent extends CoreSitePluginsCo
     @Input() componentId?: number; // ID of the component the question belongs to.
     @Input() attemptId?: number; // Attempt ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the question belongs to (if any). It can be used to improve performance with filters.
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/core/features/siteplugins/components/question/question.ts b/src/core/features/siteplugins/components/question/question.ts
index 3354ebe11..8c9bd7a39 100644
--- a/src/core/features/siteplugins/components/question/question.ts
+++ b/src/core/features/siteplugins/components/question/question.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
 
 import { AddonModQuizQuestion } from '@features/question/classes/base-question-component';
@@ -34,7 +35,7 @@ export class CoreSitePluginsQuestionComponent extends CoreSitePluginsCompileInit
     @Input() componentId?: number; // ID of the component the question belongs to.
     @Input() attemptId?: number; // Attempt ID.
     @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the question belongs to (if any). It can be used to improve performance with filters.
     @Input() review?: boolean; // Whether the user is in review mode.
diff --git a/src/core/features/siteplugins/components/user-profile-field/user-profile-field.ts b/src/core/features/siteplugins/components/user-profile-field/user-profile-field.ts
index efd1a04c8..f67f48021 100644
--- a/src/core/features/siteplugins/components/user-profile-field/user-profile-field.ts
+++ b/src/core/features/siteplugins/components/user-profile-field/user-profile-field.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, OnInit, Input } from '@angular/core';
 import { FormGroup } from '@angular/forms';
 
@@ -36,7 +37,7 @@ export class CoreSitePluginsUserProfileFieldComponent extends CoreSitePluginsCom
     @Input() disabled = false; // True if disabled. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control. Required if edit=true or signup=true.
     @Input() registerAuth?: string; // Register auth method. E.g. 'email'.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the field belongs to (if any). It can be used to improve performance with filters.
 
diff --git a/src/core/features/siteplugins/pages/module-index/module-index.ts b/src/core/features/siteplugins/pages/module-index/module-index.ts
index 3a37e712d..31be44734 100644
--- a/src/core/features/siteplugins/pages/module-index/module-index.ts
+++ b/src/core/features/siteplugins/pages/module-index/module-index.ts
@@ -21,6 +21,7 @@ import { CoreSitePluginsModuleIndexComponent } from '../../components/module-ind
 import { CoreSites } from '@services/sites';
 import { CoreFilterFormatTextOptions } from '@features/filter/services/filter';
 import { CoreFilterHelper } from '@features/filter/services/filter-helper';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Page to render the index page of a module site plugin.
@@ -57,7 +58,7 @@ export class CoreSitePluginsModuleIndexPage implements OnInit, CanLeave {
 
             const filteredTitle = await CoreFilterHelper.getFiltersAndFormatText(
                 this.title.trim(),
-                'module',
+                ContextLevel.MODULE,
                 this.module?.id ?? -1,
                 options,
                 siteId,
diff --git a/src/core/features/user/classes/base-profilefield-component.ts b/src/core/features/user/classes/base-profilefield-component.ts
index 9a61cf327..ae8edbfe6 100644
--- a/src/core/features/user/classes/base-profilefield-component.ts
+++ b/src/core/features/user/classes/base-profilefield-component.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input, OnInit } from '@angular/core';
 import { FormGroup, Validators, FormControl } from '@angular/forms';
 
@@ -32,7 +33,7 @@ export abstract class CoreUserProfileFieldBaseComponent<T = string> implements O
     @Input() disabled = false; // True if disabled. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control. Required if edit=true or signup=true.
     @Input() registerAuth?: string; // Register auth method. E.g. 'email'.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the field belongs to (if any). It can be used to improve performance with filters.
 
diff --git a/src/core/features/user/components/user-profile-field/user-profile-field.ts b/src/core/features/user/components/user-profile-field/user-profile-field.ts
index e33b57526..c3b4e82e5 100644
--- a/src/core/features/user/components/user-profile-field/user-profile-field.ts
+++ b/src/core/features/user/components/user-profile-field/user-profile-field.ts
@@ -19,6 +19,7 @@ import { AuthEmailSignupProfileField } from '@features/login/services/login-help
 import { CoreUserProfileField } from '@features/user/services/user';
 import { CoreUserProfileFieldDelegate } from '@features/user/services/user-profile-field-delegate';
 import { CoreUtils } from '@services/utils/utils';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Directive to render user profile field.
@@ -34,7 +35,7 @@ export class CoreUserProfileFieldComponent implements OnInit {
     @Input() edit = false; // True if editing the field. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control. Required if edit=true or signup=true.
     @Input() registerAuth?: string; // Register auth method. E.g. 'email'.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() contextInstanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the field belongs to (if any). It can be used to improve performance with filters.
 
@@ -78,7 +79,7 @@ export type CoreUserProfileFieldComponentData = {
     disabled?: boolean;
     form?: FormGroup;
     registerAuth?: string;
-    contextLevel?: string;
+    contextLevel?: ContextLevel;
     contextInstanceId?: number;
     courseId?: number;
 };
diff --git a/src/core/features/viewer/components/text/text.ts b/src/core/features/viewer/components/text/text.ts
index a6ae057fa..a7c82dfed 100644
--- a/src/core/features/viewer/components/text/text.ts
+++ b/src/core/features/viewer/components/text/text.ts
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import { ContextLevel } from '@/core/constants';
 import { Component, Input } from '@angular/core';
 import { CoreFileEntry } from '@services/file-helper';
 
@@ -34,7 +35,7 @@ export class CoreViewerTextComponent {
     @Input() componentId?: string | number; // Component ID to use in format-text.
     @Input() files?: CoreFileEntry[]; // List of files.
     @Input() filter?: boolean; // Whether to filter the text.
-    @Input() contextLevel?: string; // The context level.
+    @Input() contextLevel?: ContextLevel; // The context level.
     @Input() instanceId?: number; // The instance ID related to the context.
     @Input() courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
     @Input() displayCopyButton?: boolean; // Whether to display a button to copy the contents.
diff --git a/src/core/services/utils/text.ts b/src/core/services/utils/text.ts
index dd7d148ef..acec137e3 100644
--- a/src/core/services/utils/text.ts
+++ b/src/core/services/utils/text.ts
@@ -27,6 +27,7 @@ import { CoreUrl } from '@singletons/url';
 import { AlertButton } from '@ionic/angular';
 import { CorePath } from '@singletons/path';
 import { CorePlatform } from '@services/platform';
+import { ContextLevel } from '@/core/constants';
 
 /**
  * Different type of errors the app can treat.
@@ -1048,7 +1049,7 @@ export type CoreTextUtilsViewTextOptions = {
     componentId?: string | number; // An ID to use in conjunction with the component.
     files?: CoreWSFile[]; // List of files to display along with the text.
     filter?: boolean; // Whether the text should be filtered.
-    contextLevel?: string; // The context level.
+    contextLevel?: ContextLevel; // The context level.
     instanceId?: number; // The instance ID related to the context.
     courseId?: number; // Course ID the text belongs to. It can be used to improve performance with filters.
     displayCopyButton?: boolean; // Whether to display a button to copy the text.