AAE-40136 Migrate locale settings to signals (#11361)

.github/actions/download-node-modules-and-artifacts/action.yml

@@ -8,6 +8,8 @@ runs:
       with:
         path: dist
         key: dist-${{ github.run_id }}-${{ github.run_attempt }}
+        restore-keys: |
+          dist-${{ github.run_id }}-
         fail-on-cache-miss: true
 
     - name: Restore nxcache from cache
@@ -15,6 +17,8 @@ runs:
       with:
         path: nxcache
         key: nxcache-${{ github.run_id }}-${{ github.run_attempt }}
+        restore-keys: |
+          nxcache-${{ github.run_id }}-
         fail-on-cache-miss: true
 
     - name: Restore node_modules from cache
@@ -22,6 +26,8 @@ runs:
       with:
         path: node_modules
         key: node-modules-${{ github.run_id }}-${{ github.run_attempt }}
+        restore-keys: |
+          node-modules-${{ github.run_id }}-
         fail-on-cache-miss: true
 
     - name: show files

docs/core/services/user-preferences.service.md

@@ -2,10 +2,10 @@
 Title: User Preferences Service
 Added: v2.0.0
 Status: Active
-Last reviewed: 2019-01-16
+Last reviewed: 2025-11-20
 ---
 
-# [User Preferences Service](../../../lib/core/src/lib/common/services/user-preferences.service.ts "Defined in user-preferences.service.ts")
+# User Preferences Service
 
 Stores preferences for the app and for individual components.
 
@@ -32,10 +32,10 @@ Stores preferences for the app and for individual components.
     Check if an item is present in the storage
     -   _property:_ `string`  - Name of the property
     -   **Returns** `boolean` - True if the item is present, false otherwise
--   **select**(property: `string`): [`Observable`](http://reactivex.io/documentation/observable.html)`<any>`<br/>
+-   **select**(property: `string`): `Observable<any>`<br/>
     Sets up a callback to notify when a property has changed.
     -   _property:_ `string`  - The property to watch
-    -   **Returns** [`Observable`](http://reactivex.io/documentation/observable.html)`<any>` - Notification callback
+    -   **Returns** `Observable<any>` - Notification callback
 -   **set**(property: `string`, value: `any`)<br/>
     Sets a preference property.
     -   _property:_ `string`  - Name of the property
@@ -71,7 +71,7 @@ class AppComponent {
 }
 ```
 
-As soon as you assign the storage prefix, all settings that you get or set via the [`UserPreferencesService`](../../core/services/user-preferences.service.md) will be saved to a dedicated profile.
+As soon as you assign the storage prefix, all settings that you get or set via the `UserPreferencesService` will be saved to a dedicated profile.
 
 You can import the service into your controller and use its APIs as shown below:
 
@@ -96,7 +96,7 @@ The service also provides quick access to a set of the "known" properties used a
 | ---- | ---- | ----------- |
 | authType | `string` | Authorization type (can be "ECM", "BPM" or "ALL"). |
 | disableCSRF | `boolean` | Prevents the CSRF Token from being submitted if true. Only valid for Process Services. |
-| paginationSize | `number` | [`Pagination`](../../../lib/content-services/document-list/models/document-library.model.ts) size. |
+| paginationSize | `number` | `Pagination` size. |
 | locale | `string` | Current locale setting. |
 
 ## User Preference onChange Stream
@@ -112,7 +112,13 @@ whole set of user properties. This is useful when a component needs to react to
 ```
 
 You can also use the `select` method to get notification when a particular property is changed.
-A set of basic properties is added into the enumeration [`UserPreferenceValues`](lib/core/src/lib/services/user-preferences.service.ts) which gives you the key value to access the standard user preference service properties : **PaginationSize**, **DisableCSRF**, **Locale**, **SupportedPageSizes** and **ExpandedSideNavStatus**.
+A set of basic properties is added into the enumeration `UserPreferenceValues` which gives you the key value to access the standard user preference service properties: 
+
+- `PaginationSize`
+- `DisableCSRF`
+- `Locale`
+- `SupportedPageSizes`
+- `ExpandedSideNavStatus`
 
 ```ts
     userPreferences.disableCSRF = true;
@@ -120,3 +126,58 @@ A set of basic properties is added into the enumeration [`UserPreferenceValues`]
         console.log(CSRFflag); //this will be true;
     });
 ```
+
+### Convenience Observables and Signals
+
+For commonly accessed preferences like `locale`, the service provides both observables and signals that simplify access patterns.
+
+#### Using Signals (Recommended - No Subscription Needed!)
+
+Signals automatically handle cleanup and don't require manual unsubscription:
+
+```ts
+export class MyComponent {
+    private userPreferences = inject(UserPreferencesService);
+    
+    // Signal - automatically reactive, no subscription needed!
+    currentLocale = this.userPreferences.localeSignal;
+    
+    // Use in template or computed values
+    displayText = computed(() => `Current locale: ${this.currentLocale()}`);
+}
+```
+
+Available signals:
+
+- `localeSignal` - Current locale value
+- `paginationSizeSignal` - Current pagination size
+- `supportedPageSizesSignal` - Supported page sizes array
+
+**Benefits of signals:**
+
+- ✅ No manual subscription/unsubscription needed
+- ✅ Automatic cleanup when component is destroyed
+- ✅ Better performance with fine-grained reactivity
+- ✅ Simpler code - just read the value with `()`
+
+#### Using Observables (For Advanced Cases)
+
+If you need RxJS operators or imperative subscriptions:
+
+```ts
+constructor(private userPreferences: UserPreferencesService) {
+    // Observable - requires takeUntilDestroyed() to prevent memory leaks
+    this.userPreferences.locale$
+        .pipe(takeUntilDestroyed())
+        .subscribe(locale => {
+            this.currentLocale = locale;
+        });
+}
+```
+
+Available observables:
+- `locale$` - Observable for locale changes
+- `paginationSize$` - Observable for pagination size changes  
+- `supportedPageSizes$` - Observable for supported page sizes changes
+
+**Note:** When subscribing to observables from a singleton service in a component, always use `takeUntilDestroyed()` or `takeUntil()` to prevent memory leaks.

lib/content-services/src/lib/search/components/search-date-range-tabbed/search-date-range/search-date-range.component.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { Component, DestroyRef, EventEmitter, inject, Inject, Input, OnInit, Output, ViewEncapsulation } from '@angular/core';
+import { Component, DestroyRef, effect, EventEmitter, inject, Inject, Input, OnInit, Output, ViewEncapsulation } from '@angular/core';
 import { endOfDay, isAfter, isBefore, isValid, parse } from 'date-fns';
 import { DateAdapter, MAT_DATE_FORMATS, MAT_DATE_LOCALE, MatDateFormats } from '@angular/material/core';
 import { DateFnsAdapter, MAT_DATE_FNS_FORMATS } from '@angular/material-date-fns-adapter';
@@ -23,7 +23,7 @@ import { InLastDateType } from './in-last-date-type';
 import { DateRangeType } from './date-range-type';
 import { SearchDateRange } from './search-date-range';
 import { FormBuilder, ReactiveFormsModule, UntypedFormControl, Validators } from '@angular/forms';
-import { DateFnsUtils, UserPreferencesService, UserPreferenceValues } from '@alfresco/adf-core';
+import { DateFnsUtils, UserPreferencesService } from '@alfresco/adf-core';
 import { CommonModule } from '@angular/common';
 import { MatRadioModule } from '@angular/material/radio';
 import { TranslatePipe } from '@ngx-translate/core';
@@ -100,7 +100,13 @@ export class SearchDateRangeComponent implements OnInit {
         private userPreferencesService: UserPreferencesService,
         private dateAdapter: DateAdapter<DateFnsAdapter>,
         @Inject(MAT_DATE_FORMATS) private dateFormatConfig: MatDateFormats
-    ) {}
+    ) {
+        // Use effect to react to locale signal changes (must be in injection context)
+        effect(() => {
+            const locale = this.userPreferencesService.localeSignal();
+            this.dateAdapter.setLocale(DateFnsUtils.getLocaleFromString(locale));
+        });
+    }
 
     readonly endDateValidator = (formControl: UntypedFormControl): { [key: string]: boolean } | null => {
         if (isBefore(formControl.value, this.betweenStartDateFormControl.value) || isAfter(formControl.value, this.convertedMaxDate)) {
@@ -114,10 +120,6 @@ export class SearchDateRangeComponent implements OnInit {
     ngOnInit(): void {
         this.dateFormatConfig.display.dateInput = this.dateFormat;
         this.convertedMaxDate = endOfDay(this.maxDate && this.maxDate !== 'today' ? parse(this.maxDate, this.dateFormat, new Date()) : new Date());
-        this.userPreferencesService
-            .select(UserPreferenceValues.Locale)
-            .pipe(takeUntilDestroyed(this.destroyRef))
-            .subscribe((locale) => this.dateAdapter.setLocale(DateFnsUtils.getLocaleFromString(locale)));
         this.form.controls.dateRangeType.valueChanges
             .pipe(takeUntilDestroyed(this.destroyRef))
             .subscribe((dateRangeType) => this.updateValidators(dateRangeType));

lib/core/src/lib/card-view/components/card-view-dateitem/card-view-dateitem.component.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { Component, DestroyRef, inject, Input, OnInit, ViewChild, ViewEncapsulation } from '@angular/core';
+import { Component, effect, Input, OnInit, ViewChild, ViewEncapsulation } from '@angular/core';
 import { DateAdapter, MAT_DATE_FORMATS } from '@angular/material/core';
 import {
     DatetimeAdapter,
@@ -25,7 +25,7 @@ import {
     MatDatetimepickerModule
 } from '@mat-datetimepicker/core';
 import { CardViewDateItemModel } from '../../models/card-view-dateitem.model';
-import { UserPreferencesService, UserPreferenceValues } from '../../../common/services/user-preferences.service';
+import { UserPreferencesService } from '../../../common/services/user-preferences.service';
 import { BaseCardView } from '../base-card-view';
 import { ClipboardService } from '../../../clipboard/clipboard.service';
 import { TranslationService } from '../../../translation/translation.service';
@@ -40,7 +40,6 @@ import { MatChipsModule } from '@angular/material/chips';
 import { MatFormFieldModule } from '@angular/material/form-field';
 import { MatDatepickerModule } from '@angular/material/datepicker';
 import { MatSnackBarModule } from '@angular/material/snack-bar';
-import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { FormControl, ReactiveFormsModule } from '@angular/forms';
 import { MatInputModule } from '@angular/material/input';
 
@@ -83,8 +82,6 @@ export class CardViewDateItemComponent extends BaseCardView<CardViewDateItemMode
 
     cardViewDateTimeControl: FormControl<Date> = new FormControl<Date>(null);
 
-    private readonly destroyRef = inject(DestroyRef);
-
     constructor(
         private dateAdapter: DateAdapter<Date>,
         private userPreferencesService: UserPreferencesService,
@@ -92,16 +89,13 @@ export class CardViewDateItemComponent extends BaseCardView<CardViewDateItemMode
         private translateService: TranslationService
     ) {
         super();
+        // Use effect to react to locale signal changes (must be in injection context)
+        effect(() => {
+            this.property.locale = this.userPreferencesService.localeSignal();
+        });
     }
 
     ngOnInit() {
-        this.userPreferencesService
-            .select(UserPreferenceValues.Locale)
-            .pipe(takeUntilDestroyed(this.destroyRef))
-            .subscribe((locale) => {
-                this.property.locale = locale;
-            });
-
         (this.dateAdapter as AdfDateFnsAdapter).displayFormat = 'MMM DD';
 
         if (this.property.multivalued) {

lib/core/src/lib/common/services/user-preferences.service.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { inject, Injectable, RendererFactory2 } from '@angular/core';
+import { inject, Injectable, RendererFactory2, Signal } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { Observable, BehaviorSubject } from 'rxjs';
 import { AppConfigService, AppConfigValues } from '../../app-config/app-config.service';
@@ -25,6 +25,7 @@ import { LanguageItem } from './language-item.interface';
 import { DOCUMENT } from '@angular/common';
 import { Directionality, Direction } from '@angular/cdk/bidi';
 import { DEFAULT_LANGUAGE_LIST } from '../models/default-languages.model';
+import { toSignal } from '@angular/core/rxjs-interop';
 
 // eslint-disable-next-line no-shadow
 export enum UserPreferenceValues {
@@ -53,10 +54,78 @@ export class UserPreferencesService {
     private onChangeSubject: BehaviorSubject<any>;
     onChange: Observable<any>;
 
-    constructor(public translate: TranslateService, private appConfig: AppConfigService, private storage: StorageService) {
+    /**
+     * Observable that emits the current locale whenever it changes.
+     * This is a convenience property that simplifies subscribing to locale changes.
+     *
+     * @example Observable usage (requires manual unsubscription):
+     * ```typescript
+     * constructor(private userPreferencesService: UserPreferencesService) {
+     *   this.userPreferencesService.locale$
+     *     .pipe(takeUntilDestroyed())
+     *     .subscribe(locale => {
+     *       this.currentLocale = locale;
+     *     });
+     * }
+     * ```
+     *
+     * @example Signal usage (automatic cleanup, recommended):
+     * ```typescript
+     * export class MyComponent {
+     *   private userPreferencesService = inject(UserPreferencesService);
+     *   currentLocale = this.userPreferencesService.localeSignal; // Signal - no subscription needed!
+     * }
+     * ```
+     */
+    readonly locale$: Observable<string>;
+
+    /**
+     * Signal that provides the current locale value.
+     * Automatically handles cleanup - no need for takeUntilDestroyed or manual unsubscription.
+     * This is the recommended way to access locale in components.
+     */
+    readonly localeSignal: Signal<string>;
+
+    /**
+     * Observable that emits the current pagination size whenever it changes.
+     */
+    readonly paginationSize$: Observable<number>;
+
+    /**
+     * Signal that provides the current pagination size value.
+     */
+    readonly paginationSizeSignal: Signal<number>;
+
+    /**
+     * Observable that emits the supported page sizes whenever they change.
+     */
+    readonly supportedPageSizes$: Observable<number[]>;
+
+    /**
+     * Signal that provides the supported page sizes array.
+     */
+    readonly supportedPageSizesSignal: Signal<number[]>;
+
+    constructor(
+        public translate: TranslateService,
+        private appConfig: AppConfigService,
+        private storage: StorageService
+    ) {
         this.onChangeSubject = new BehaviorSubject(this.userPreferenceStatus);
         this.onChange = this.onChangeSubject.asObservable();
 
+        // Initialize convenience observables
+        this.locale$ = this.select<string>(UserPreferenceValues.Locale);
+        this.paginationSize$ = this.select<number>(UserPreferenceValues.PaginationSize);
+        this.supportedPageSizes$ = this.select<string>(UserPreferenceValues.SupportedPageSizes).pipe(
+            map((value) => (value ? JSON.parse(value) : this.defaults.supportedPageSizes))
+        );
+
+        // Initialize convenience signals (automatically handle cleanup)
+        this.localeSignal = toSignal(this.locale$, { initialValue: this.defaults.locale });
+        this.paginationSizeSignal = toSignal(this.paginationSize$, { initialValue: this.defaults.paginationSize });
+        this.supportedPageSizesSignal = toSignal(this.supportedPageSizes$, { initialValue: this.defaults.supportedPageSizes });
+
         this.appConfig.onLoad.subscribe(() => {
             this.initUserPreferenceStatus();
         });

lib/core/src/lib/common/utils/date-fns-adapter.ts

@@ -17,10 +17,11 @@
 
 import { DateFnsAdapter } from '@angular/material-date-fns-adapter';
 import { DateFnsUtils } from './date-fns-utils';
-import { Inject, Injectable, Optional } from '@angular/core';
+import { effect, Inject, Injectable, Optional } from '@angular/core';
 import { MAT_DATE_FORMATS, MAT_DATE_LOCALE, MatDateFormats } from '@angular/material/core';
-import { UserPreferenceValues, UserPreferencesService } from '../services/user-preferences.service';
+import { UserPreferencesService } from '../services/user-preferences.service';
 import { isValid, Locale, parse } from 'date-fns';
+import { enUS } from 'date-fns/locale';
 
 /**
  * Date-fns adapter with moment-to-date-fns conversion.
@@ -82,10 +83,24 @@ export class AdfDateFnsAdapter extends DateFnsAdapter {
         @Optional() @Inject(MAT_DATE_FORMATS) private formats: MatDateFormats,
         preferences: UserPreferencesService
     ) {
-        super(matDateLocale);
+        // Ensure we have a valid locale for the base class
+        // If matDateLocale is not provided, use enUS as default
+        super(matDateLocale || enUS);
 
-        preferences.select(UserPreferenceValues.Locale).subscribe((locale: string) => {
+        // Initialize locale synchronously from signal's initial value
-            this.setLocale(DateFnsUtils.getLocaleFromString(locale));
+        // This ensures locale is set before any format() calls
+        const initialLocale = preferences.localeSignal();
+        if (initialLocale) {
+            this.setLocale(DateFnsUtils.getLocaleFromString(initialLocale));
+        }
+
+        // Use effect to reactively update locale when signal changes
+        // Note: This adapter is a singleton service, so no cleanup needed
+        effect(() => {
+            const locale = preferences.localeSignal();
+            if (locale) {
+                this.setLocale(DateFnsUtils.getLocaleFromString(locale));
+            }
         });
     }
 

lib/core/src/lib/common/utils/moment-date-adapter.ts

@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-import { Injectable } from '@angular/core';
+import { effect, Injectable } from '@angular/core';
 import { DateAdapter } from '@angular/material/core';
-import { UserPreferencesService, UserPreferenceValues } from '../services/user-preferences.service';
+import { UserPreferencesService } from '../services/user-preferences.service';
 
 // Stub for the moment.js integration.
 // While this dependency is no longer used by the libraries, the moment adapter can still discover the moment.js linked to the application
@@ -37,7 +37,10 @@ export class MomentDateAdapter extends DateAdapter<Moment> {
     constructor(preferences: UserPreferencesService) {
         super();
 
-        preferences.select(UserPreferenceValues.Locale).subscribe((locale: string) => {
+        // Use effect to reactively update locale when signal changes
+        // Note: This adapter is a singleton service, so no cleanup needed
+        effect(() => {
+            const locale = preferences.localeSignal();
             this.setLocale(locale);
         });
     }

lib/core/src/lib/datatable/components/date-cell/date-cell.component.ts

@@ -15,14 +15,13 @@
  * limitations under the License.
  */
 
-import { ChangeDetectionStrategy, Component, Input, OnInit, ViewEncapsulation, inject, ChangeDetectorRef } from '@angular/core';
+import { ChangeDetectionStrategy, Component, Input, OnInit, ViewEncapsulation, inject, ChangeDetectorRef, effect } from '@angular/core';
 import { DataTableCellComponent } from '../datatable-cell/datatable-cell.component';
 import { AppConfigService } from '../../../app-config/app-config.service';
 import { DateConfig } from '../../data/data-column.model';
 import { LocalizedDatePipe, TimeAgoPipe } from '../../../pipes';
 import { AsyncPipe } from '@angular/common';
-import { UserPreferencesService, UserPreferenceValues } from '../../../common/services/user-preferences.service';
+import { UserPreferencesService } from '../../../common/services/user-preferences.service';
-import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 
 @Component({
     imports: [LocalizedDatePipe, TimeAgoPipe, AsyncPipe],
@@ -52,19 +51,18 @@ export class DateCellComponent extends DataTableCellComponent implements OnInit
         locale: undefined
     };
 
-    ngOnInit(): void {
+    constructor() {
-        // Subscribe to locale changes
+        super();
-        this.userPreferencesService
+        // Use effect to react to locale signal changes (must be in injection context)
-            .select(UserPreferenceValues.Locale)
+        effect(() => {
-            .pipe(takeUntilDestroyed(this.destroyRef))
+            this.userLocale = this.userPreferencesService.localeSignal() || 'en';
-            .subscribe((locale) => {
+            this.setConfig();
-                this.userLocale = locale || 'en';
+            this.updateValue(); // Recalculate computedTitle with new locale
-                this.setConfig();
+            this.cdr.markForCheck();
-                this.updateValue(); // Recalculate computedTitle with new locale
+        });
-                this.cdr.markForCheck();
+    }
-            });
 
-        this.setConfig();
+    ngOnInit(): void {
         super.ngOnInit();
     }
 

lib/core/src/lib/pipes/decimal-number.pipe.ts

@@ -18,9 +18,8 @@
 import { DecimalPipe } from '@angular/common';
 import { Pipe, PipeTransform } from '@angular/core';
 import { AppConfigService } from '../app-config/app-config.service';
-import { UserPreferencesService, UserPreferenceValues } from '../common/services/user-preferences.service';
+import { UserPreferencesService } from '../common/services/user-preferences.service';
 import { DecimalNumberModel } from '../models/decimal-number.model';
-import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 
 @Pipe({
     name: 'adfDecimalNumber',
@@ -32,22 +31,14 @@ export class DecimalNumberPipe implements PipeTransform {
     static DEFAULT_MIN_FRACTION_DIGITS = 0;
     static DEFAULT_MAX_FRACTION_DIGITS = 2;
 
-    defaultLocale: string = DecimalNumberPipe.DEFAULT_LOCALE;
     defaultMinIntegerDigits: number = DecimalNumberPipe.DEFAULT_MIN_INTEGER_DIGITS;
     defaultMinFractionDigits: number = DecimalNumberPipe.DEFAULT_MIN_FRACTION_DIGITS;
     defaultMaxFractionDigits: number = DecimalNumberPipe.DEFAULT_MAX_FRACTION_DIGITS;
-    constructor(public userPreferenceService?: UserPreferencesService, public appConfig?: AppConfigService) {
-        if (this.userPreferenceService) {
-            this.userPreferenceService
-                .select(UserPreferenceValues.Locale)
-                .pipe(takeUntilDestroyed())
-                .subscribe((locale) => {
-                    if (locale) {
-                        this.defaultLocale = locale;
-                    }
-                });
-        }
 
+    constructor(
+        public userPreferenceService?: UserPreferencesService,
+        public appConfig?: AppConfigService
+    ) {
         if (this.appConfig) {
             this.defaultMinIntegerDigits = this.appConfig.get<number>('decimalValues.minIntegerDigits', DecimalNumberPipe.DEFAULT_MIN_INTEGER_DIGITS);
             this.defaultMinFractionDigits = this.appConfig.get<number>(
@@ -67,7 +58,9 @@ export class DecimalNumberPipe implements PipeTransform {
         const actualMaxFractionDigits: number = digitsInfo?.maxFractionDigits ? digitsInfo.maxFractionDigits : this.defaultMaxFractionDigits;
 
         const actualDigitsInfo = `${actualMinIntegerDigits}.${actualMinFractionDigits}-${actualMaxFractionDigits}`;
-        const actualLocale = locale || this.defaultLocale;
+        // Use signal directly - no subscription needed!
+        const defaultLocale = this.userPreferenceService?.localeSignal() || DecimalNumberPipe.DEFAULT_LOCALE;
+        const actualLocale = locale || defaultLocale;
 
         const decimalPipe: DecimalPipe = new DecimalPipe(actualLocale);
 

lib/core/src/lib/pipes/localized-date.pipe.ts

@@ -16,38 +16,25 @@
  */
 
 import { DatePipe } from '@angular/common';
-import { Pipe, PipeTransform, OnDestroy } from '@angular/core';
+import { Pipe, PipeTransform } from '@angular/core';
 import { AppConfigService } from '../app-config/app-config.service';
-import { UserPreferencesService, UserPreferenceValues } from '../common/services/user-preferences.service';
+import { UserPreferencesService } from '../common/services/user-preferences.service';
-import { Subject } from 'rxjs';
-import { takeUntil } from 'rxjs/operators';
 
 @Pipe({
     standalone: true,
     name: 'adfLocalizedDate',
     pure: false
 })
-export class LocalizedDatePipe implements PipeTransform, OnDestroy {
+export class LocalizedDatePipe implements PipeTransform {
     static DEFAULT_LOCALE = 'en-US';
     static DEFAULT_DATE_FORMAT = 'mediumDate';
 
-    defaultLocale: string = LocalizedDatePipe.DEFAULT_LOCALE;
     defaultFormat: string = LocalizedDatePipe.DEFAULT_DATE_FORMAT;
 
-    private onDestroy$ = new Subject<boolean>();
+    constructor(
-
+        public userPreferenceService?: UserPreferencesService,
-    constructor(public userPreferenceService?: UserPreferencesService, public appConfig?: AppConfigService) {
+        public appConfig?: AppConfigService
-        if (this.userPreferenceService) {
+    ) {
-            this.userPreferenceService
-                .select(UserPreferenceValues.Locale)
-                .pipe(takeUntil(this.onDestroy$))
-                .subscribe((locale) => {
-                    if (locale) {
-                        this.defaultLocale = locale;
-                    }
-                });
-        }
-
         if (this.appConfig) {
             this.defaultFormat = this.appConfig.get<string>('dateValues.defaultDateFormat', LocalizedDatePipe.DEFAULT_DATE_FORMAT);
         }
@@ -55,13 +42,10 @@ export class LocalizedDatePipe implements PipeTransform, OnDestroy {
 
     transform(value: Date | string | number, format?: string, locale?: string, timezone?: string): string {
         const actualFormat = format || this.defaultFormat;
-        const actualLocale = locale || this.defaultLocale;
+        // Use signal directly - no subscription needed!
+        const defaultLocale = this.userPreferenceService?.localeSignal() || LocalizedDatePipe.DEFAULT_LOCALE;
+        const actualLocale = locale || defaultLocale;
         const datePipe = timezone ? new DatePipe(actualLocale, timezone) : new DatePipe(actualLocale);
         return datePipe.transform(value, actualFormat);
     }
-
-    ngOnDestroy() {
-        this.onDestroy$.next(true);
-        this.onDestroy$.complete();
-    }
 }

lib/core/src/lib/pipes/time-ago.pipe.ts

@@ -17,10 +17,9 @@
 
 import { Pipe, PipeTransform } from '@angular/core';
 import { AppConfigService } from '../app-config/app-config.service';
-import { UserPreferencesService, UserPreferenceValues } from '../common/services/user-preferences.service';
+import { UserPreferencesService } from '../common/services/user-preferences.service';
 import { DatePipe } from '@angular/common';
 import { differenceInDays, formatDistance } from 'date-fns';
-import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { DateFnsUtils } from '../common/utils/date-fns-utils';
 
 @Pipe({
@@ -32,25 +31,20 @@ export class TimeAgoPipe implements PipeTransform {
     static DEFAULT_LOCALE = 'en-US';
     static DEFAULT_DATE_TIME_FORMAT = 'dd/MM/yyyy HH:mm';
 
-    defaultLocale: string;
     defaultDateTimeFormat: string;
 
     constructor(
         public userPreferenceService: UserPreferencesService,
         public appConfig: AppConfigService
     ) {
-        this.userPreferenceService
-            .select(UserPreferenceValues.Locale)
-            .pipe(takeUntilDestroyed())
-            .subscribe((locale) => {
-                this.defaultLocale = locale || TimeAgoPipe.DEFAULT_LOCALE;
-            });
         this.defaultDateTimeFormat = this.appConfig.get<string>('dateValues.defaultDateTimeFormat', TimeAgoPipe.DEFAULT_DATE_TIME_FORMAT);
     }
 
     transform(value: Date, locale?: string) {
         if (value !== null && value !== undefined) {
-            const actualLocale = locale || this.defaultLocale;
+            // Use signal directly - no subscription needed!
+            const defaultLocale = this.userPreferenceService.localeSignal() || TimeAgoPipe.DEFAULT_LOCALE;
+            const actualLocale = locale || defaultLocale;
             const diff = differenceInDays(new Date(), new Date(value));
             if (diff > 7) {
                 const datePipe: DatePipe = new DatePipe(actualLocale);

lib/core/src/lib/translation/translation.service.ts

@@ -15,11 +15,11 @@
  * limitations under the License.
  */
 
-import { Inject, Injectable, InjectionToken, Optional } from '@angular/core';
+import { effect, Inject, Injectable, InjectionToken, Optional } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { Observable } from 'rxjs';
 import { TranslateLoaderService } from './translate-loader.service';
-import { UserPreferencesService, UserPreferenceValues } from '../common/services/user-preferences.service';
+import { UserPreferencesService } from '../common/services/user-preferences.service';
 
 export const TRANSLATION_PROVIDER = new InjectionToken('Injection token for translation providers.');
 
@@ -71,7 +71,10 @@ export class TranslationService {
             }
         }
 
-        userPreferencesService.select(UserPreferenceValues.Locale).subscribe((locale) => {
+        // Use effect to reactively update translations when locale signal changes
+        // Note: This is a singleton service, so no cleanup needed
+        effect(() => {
+            const locale = userPreferencesService.localeSignal();
             if (locale) {
                 this.userLang = locale;
                 this.use(this.userLang);

lib/process-services-cloud/src/lib/common/date-range-filter/date-range-filter.component.spec.ts

@@ -22,12 +22,14 @@ import { DateCloudFilterType } from '../../models/date-cloud-filter.model';
 import { DateRangeFilterService } from './date-range-filter.service';
 import { mockFilterProperty } from '../mock/date-range-filter.mock';
 import { add, endOfDay } from 'date-fns';
+import { enUS } from 'date-fns/locale';
 import { HarnessLoader } from '@angular/cdk/testing';
 import { TestbedHarnessEnvironment } from '@angular/cdk/testing/testbed';
 import { MatSelectHarness } from '@angular/material/select/testing';
 import { MatFormFieldHarness } from '@angular/material/form-field/testing';
 import { MatDateRangeInputHarness } from '@angular/material/datepicker/testing';
 import { NoopTranslateModule } from '@alfresco/adf-core';
+import { MAT_DATE_LOCALE } from '@angular/material/core';
 
 describe('DateRangeFilterComponent', () => {
     let component: DateRangeFilterComponent;
@@ -37,7 +39,8 @@ describe('DateRangeFilterComponent', () => {
 
     beforeEach(() => {
         TestBed.configureTestingModule({
-            imports: [NoopTranslateModule, DateRangeFilterComponent]
+            imports: [NoopTranslateModule, DateRangeFilterComponent],
+            providers: [{ provide: MAT_DATE_LOCALE, useValue: enUS }]
         });
         fixture = TestBed.createComponent(DateRangeFilterComponent);
         component = fixture.componentInstance;

lib/process-services-cloud/src/lib/process/process-filters/components/edit-process-filter/edit-process-filter-cloud.component.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { Component, DestroyRef, EventEmitter, inject, Input, OnChanges, OnInit, Output, SimpleChanges, ViewEncapsulation } from '@angular/core';
+import { Component, DestroyRef, effect, EventEmitter, inject, Input, OnChanges, Output, SimpleChanges, ViewEncapsulation } from '@angular/core';
 import { AbstractControl, FormBuilder, FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms';
 import { DateAdapter } from '@angular/material/core';
 import { MatDialog } from '@angular/material/dialog';
@@ -29,7 +29,7 @@ import {
     ProcessFilterProperties,
     ProcessSortFilterProperty
 } from '../../models/process-filter-cloud.model';
-import { DateFnsUtils, IconComponent, TranslationService, UserPreferencesService, UserPreferenceValues } from '@alfresco/adf-core';
+import { DateFnsUtils, IconComponent, TranslationService, UserPreferencesService } from '@alfresco/adf-core';
 import { ProcessFilterCloudService } from '../../services/process-filter-cloud.service';
 import { ProcessFilterDialogCloudComponent } from '../process-filter-dialog/process-filter-dialog-cloud.component';
 import { ProcessCloudService } from '../../../services/process-cloud.service';
@@ -101,7 +101,7 @@ interface ProcessFilterFormProps {
     styleUrls: ['./edit-process-filter-cloud.component.scss'],
     encapsulation: ViewEncapsulation.None
 })
-export class EditProcessFilterCloudComponent implements OnInit, OnChanges {
+export class EditProcessFilterCloudComponent implements OnChanges {
     /** The name of the application. */
     @Input()
     appName: string = '';
@@ -228,13 +228,14 @@ export class EditProcessFilterCloudComponent implements OnInit, OnChanges {
         private processFilterCloudService: ProcessFilterCloudService,
         private appsProcessCloudService: AppsProcessCloudService,
         private processCloudService: ProcessCloudService
-    ) {}
+    ) {
-
+        // Use effect to react to locale signal changes (must be in injection context)
-    ngOnInit() {
+        effect(() => {
-        this.userPreferencesService
+            const locale = this.userPreferencesService.localeSignal();
-            .select(UserPreferenceValues.Locale)
+            if (locale) {
-            .pipe(takeUntilDestroyed(this.destroyRef))
+                this.dateAdapter.setLocale(DateFnsUtils.getLocaleFromString(locale));
-            .subscribe((locale) => this.dateAdapter.setLocale(locale));
+            }
+        });
     }
 
     ngOnChanges(changes: SimpleChanges) {

lib/process-services-cloud/src/lib/task/task-filters/components/edit-task-filters/base-edit-task-filter-cloud.component.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { DestroyRef, Directive, EventEmitter, inject, Input, OnChanges, OnInit, Output, SimpleChanges } from '@angular/core';
+import { DestroyRef, Directive, effect, EventEmitter, inject, Input, OnChanges, Output, SimpleChanges } from '@angular/core';
 import { AssignmentType, FilterOptions, TaskFilterAction, TaskFilterProperties, TaskStatusFilter } from '../../models/filter-cloud.model';
 import { TaskCloudService } from './../../../services/task-cloud.service';
 import { AppsProcessCloudService } from './../../../../app/services/apps-process-cloud.service';
@@ -24,7 +24,7 @@ import { AbstractControl, UntypedFormBuilder, UntypedFormGroup } from '@angular/
 import { debounceTime, filter, finalize, switchMap } from 'rxjs/operators';
 import { Observable } from 'rxjs';
 import { DateAdapter } from '@angular/material/core';
-import { DateFnsUtils, TranslationService, UserPreferencesService, UserPreferenceValues } from '@alfresco/adf-core';
+import { DateFnsUtils, TranslationService, UserPreferencesService } from '@alfresco/adf-core';
 import { TaskFilterDialogCloudComponent } from '../task-filter-dialog/task-filter-dialog-cloud.component';
 import { MatDialog } from '@angular/material/dialog';
 import { IdentityUserModel } from '../../../../people/models/identity-user.model';
@@ -55,7 +55,7 @@ const ORDER_PROPERTY = 'order';
 
 @Directive()
 // eslint-disable-next-line @angular-eslint/directive-class-suffix
-export abstract class BaseEditTaskFilterCloudComponent<T> implements OnInit, OnChanges {
+export abstract class BaseEditTaskFilterCloudComponent<T> implements OnChanges {
     public static ACTIONS_DISABLED_BY_DEFAULT = [ACTION_SAVE, ACTION_DELETE];
 
     /** (required) Name of the app. */
@@ -145,11 +145,14 @@ export abstract class BaseEditTaskFilterCloudComponent<T> implements OnInit, OnC
     protected formBuilder = inject(UntypedFormBuilder);
     protected dateAdapter = inject<DateAdapter<Date>>(DateAdapter);
 
-    ngOnInit() {
+    constructor() {
-        this.userPreferencesService
+        // Use effect to react to locale signal changes (must be in injection context)
-            .select(UserPreferenceValues.Locale)
+        effect(() => {
-            .pipe(takeUntilDestroyed(this.destroyRef))
+            const locale = this.userPreferencesService.localeSignal();
-            .subscribe((locale) => this.dateAdapter.setLocale(locale));
+            if (locale) {
+                this.dateAdapter.setLocale(DateFnsUtils.getLocaleFromString(locale));
+            }
+        });
     }
 
     ngOnChanges(changes: SimpleChanges) {