MOBILE-4288 multilang: Clean up

src/addons/filter/multilang/services/handlers/multilang.ts

@@ -21,7 +21,7 @@ import { CoreSite } from '@classes/site';
 import { makeSingleton } from '@singletons';
 
 /**
- * Handler to support the Multilang filter.
+ * Handler to support the Multilang filter in core.
  */
 @Injectable({ providedIn: 'root' })
 export class AddonFilterMultilangHandlerService extends CoreFilterDefaultHandler {

src/addons/filter/multilang2/services/handlers/multilang2.ts

@@ -19,7 +19,9 @@ import { CoreFilterDefaultHandler } from '@features/filter/services/handlers/def
 import { makeSingleton } from '@singletons';
 
 /**
- * Handler to support the Multilang filter.
+ * Handler to support the multilang2 community filter.
+ *
+ * @see https://moodle.org/plugins/filter_multilang2
  */
 @Injectable({ providedIn: 'root' })
 export class AddonFilterMultilang2HandlerService extends CoreFilterDefaultHandler {

src/core/features/user/components/user-profile-field/user-profile-field.ts

@@ -12,11 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { AddonFilterMultilangHandler } from '@addons/filter/multilang/services/handlers/multilang';
-import { AddonFilterMultilang2Handler } from '@addons/filter/multilang2/services/handlers/multilang2';
 import { Component, Input, OnInit, Type } from '@angular/core';
 import { FormGroup } from '@angular/forms';
-
+import { CoreLang } from '@services/lang';
 import { AuthEmailSignupProfileField } from '@features/login/services/login-helper';
 import { CoreUserProfileField } from '@features/user/services/user';
 import { CoreUserProfileFieldDelegate } from '@features/user/services/user-profile-field-delegate';
@@ -54,8 +52,7 @@ export class CoreUserProfileFieldComponent implements OnInit {
         this.componentClass = await CoreUserProfileFieldDelegate.getComponent(this.field, this.signup);
 
         if ('param1' in this.field && this.field.param1) {
-            this.field.param1 = await AddonFilterMultilangHandler.filter(<string> this.field.param1);
-            this.field.param1 = await AddonFilterMultilang2Handler.filter(<string> this.field.param1);
+            this.field.param1 = await CoreLang.filterMultilang(<string> this.field.param1);
         }
 
         this.data.field = this.field;

src/core/services/lang.ts

@@ -24,6 +24,8 @@ import { makeSingleton, Translate, Http } from '@singletons';
 import moment from 'moment-timezone';
 import { CoreSite } from '../classes/site';
 import { CorePlatform } from '@services/platform';
+import { AddonFilterMultilangHandler } from '@addons/filter/multilang/services/handlers/multilang';
+import { AddonFilterMultilang2Handler } from '@addons/filter/multilang2/services/handlers/multilang2';
 
 /*
  * Service to handle language features, like changing the current language.
@@ -516,6 +518,18 @@ export class CoreLangProvider {
         return <Record<string, string>> await observable.toPromise();
     }
 
+    /**
+     * Filter a multilang string.
+     *
+     * @param text Multilang string.
+     * @returns Filtered string.
+     */
+    async filterMultilang(text: string): Promise<string> {
+        return Promise.resolve(text)
+            .then(text => AddonFilterMultilangHandler.filter(text))
+            .then(text => AddonFilterMultilang2Handler.filter(text));
+    }
+
     /**
      * Unload custom or site plugin strings, removing them from the translations table.
      *

src/core/services/utils/dom.ts

@@ -46,7 +46,6 @@ import { CoreViewerImageComponent } from '@features/viewer/components/image/imag
 import { CoreFormFields, CoreForms } from '../../singletons/form';
 import { CoreModalLateralTransitionEnter, CoreModalLateralTransitionLeave } from '@classes/modal-lateral-transition';
 import { CoreZoomLevel } from '@features/settings/services/settings-helper';
-import { AddonFilterMultilangHandler } from '@addons/filter/multilang/services/handlers/multilang';
 import { CoreSites } from '@services/sites';
 import { NavigationStart } from '@angular/router';
 import { filter } from 'rxjs/operators';
@@ -58,8 +57,8 @@ import { CoreSiteError } from '@classes/errors/siteerror';
 import { CoreUserSupport } from '@features/user/services/support';
 import { CoreErrorInfoComponent } from '@components/error-info/error-info';
 import { CorePlatform } from '@services/platform';
-import { AddonFilterMultilang2Handler } from '@addons/filter/multilang2/services/handlers/multilang2';
 import { CoreCancellablePromise } from '@classes/cancellable-promise';
+import { CoreLang } from '@services/lang';
 
 /*
  * "Utils" service with helper functions for UI, DOM elements and HTML code.
@@ -1171,8 +1170,7 @@ export class CoreDomUtilsProvider {
 
         if (hasHTMLTags && !CoreSites.getCurrentSite()?.isVersionGreaterEqualThan('3.7')) {
             // Treat multilang.
-            options.message = await AddonFilterMultilangHandler.filter(<string> options.message);
-            options.message = await AddonFilterMultilang2Handler.filter(<string> options.message);
+            options.message = await CoreLang.filterMultilang(<string> options.message);
         }
 
         const alertId = <string> Md5.hashAsciiStr((options.header || '') + '#' + (options.message || ''));