[ACS-9374] [ACS-9590] Fix search pop up and infinite loading animation (#4717)

* [ACS-9374] Prevent search popup flicker on Enter key press

* feat: WIP - fixing search input errors for draft PR

* Add test for mat-error on empty search term and handle loading state properly

* Add test for mat-error on empty search term and handle loading state properly

* Add whitespace error and fix unit test for checkbox

* Fix sonarcloud issue for exception

* [ACS-9374] Add validator to aca-shared

* [ACS-9374] Simplify HTML by handling error state in TypeScript

* [ACS-9374] Fix error validation process

* [ACS-9374] Fix sonarcloud issue

* [ACS-9374] Prevent library search with search term less than 2 characters

* [ACS-9374] Show validation error on checking and unchecking checkbox

* [ACS-9374] Provide default value to hasLibrariesConstraint

* [ACS-9374] Close dropdown on search submission

* [ACS-9374] Close menu on search trigger

* [ACS-9374] Remove explicit 0 from setTimeout

projects/aca-content/assets/i18n/en.json

@@ -574,7 +574,9 @@
           "FILES": "Files",
           "FOLDERS": "Folders",
           "LIBRARIES": "Libraries",
-          "HINT": "Search input must have at least 2 alphanumeric characters."
+          "MIN_LENGTH": "Search input must have at least 2 alphanumeric characters.",
+          "REQUIRED": "Search input is required.",
+          "WHITESPACE": "Search input cannot be only whitespace."
         },
         "SORT": {
             "SORTING_OPTION": "Sort by",

projects/aca-content/src/lib/components/search/search-input-control/search-input-control.component.html

@@ -6,6 +6,7 @@
       matPrefix
       class="app-search-button"
       (click)="searchSubmit()"
+      (keydown.enter)="searchSubmit()"
       [title]="'SEARCH.BUTTON.TOOLTIP' | translate"
     >
       <mat-icon [attr.aria-label]="'SEARCH.BUTTON.ARIA-LABEL' | translate">search</mat-icon>
@@ -18,10 +19,12 @@
       [type]="inputType"
       id="app-control-input"
       [formControl]="searchFieldFormControl"
-      (keyup.enter)="searchSubmit()"
+      (keydown.enter)="searchSubmit()"
+      (blur)="onBlur()"
       [placeholder]="'SEARCH.INPUT.PLACEHOLDER' | translate"
       autocomplete="off"
     />
+    
     <div matSuffix>
       <button mat-icon-button (click)="clear()">
         <mat-icon *ngIf="searchFieldFormControl.value.length" class="app-suffix-icon">clear</mat-icon>

projects/aca-content/src/lib/components/search/search-input-control/search-input-control.component.spec.ts

@@ -30,40 +30,44 @@ import { NO_ERRORS_SCHEMA } from '@angular/core';
 describe('SearchInputControlComponent', () => {
   let fixture: ComponentFixture<SearchInputControlComponent>;
   let component: SearchInputControlComponent;
-
   beforeEach(() => {
     TestBed.configureTestingModule({
       imports: [AppTestingModule, SearchInputControlComponent],
       schemas: [NO_ERRORS_SCHEMA]
     });
-
     fixture = TestBed.createComponent(SearchInputControlComponent);
     component = fixture.componentInstance;
     fixture.detectChanges();
   });
 
-  it('should emit submit event on searchSubmit', () => {
-    component.searchTerm = 'mock-search-term';
-
-    let submittedSearchTerm = '';
-    component.submit.subscribe((searchTerm) => (submittedSearchTerm = searchTerm));
+  it('should emit submit event if form is valid', () => {
+    component.searchTerm = 'valid';
+    spyOn(component.submit, 'emit');
 
     component.searchSubmit();
-    expect(submittedSearchTerm).toBe('mock-search-term');
+
+    expect(component.submit.emit).toHaveBeenCalledWith('valid');
+  });
+
+  it('should not emit submit event if form is invalid', () => {
+    component.searchTerm = '';
+    spyOn(component.submit, 'emit');
+
+    component.searchSubmit();
+
+    expect(component.submit.emit).not.toHaveBeenCalled();
   });
 
   it('should emit searchChange event on inputChange', () => {
     let emittedSearchTerm = '';
     component.searchChange.subscribe((searchTerm) => (emittedSearchTerm = searchTerm));
     component.searchTerm = 'mock-search-term';
-
     expect(emittedSearchTerm).toBe('mock-search-term');
   });
 
   it('should emit searchChange event on clear', () => {
     let emittedSearchTerm: string = null;
     component.searchChange.subscribe((searchTerm) => (emittedSearchTerm = searchTerm));
-
     component.clear();
     expect(emittedSearchTerm).toBe('');
   });
@@ -71,18 +75,14 @@ describe('SearchInputControlComponent', () => {
   it('should clear searchTerm', () => {
     component.searchTerm = 'c';
     fixture.detectChanges();
-
     component.clear();
     expect(component.searchTerm).toBe('');
   });
 
   it('should check if searchTerm has a length less than 2', () => {
-    expect(component.isTermTooShort()).toBe(false);
-
     component.searchTerm = 'd';
     fixture.detectChanges();
     expect(component.isTermTooShort()).toBe(true);
-
     component.searchTerm = 'dd';
     fixture.detectChanges();
     expect(component.isTermTooShort()).toBe(false);

projects/aca-content/src/lib/components/search/search-input-control/search-input-control.component.ts

@@ -22,15 +22,29 @@
  * from Hyland Software. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { Component, EventEmitter, Input, Output, ViewEncapsulation, ViewChild, ElementRef, OnInit, inject, DestroyRef } from '@angular/core';
+import {
+  Component,
+  EventEmitter,
+  Input,
+  Output,
+  ViewEncapsulation,
+  ViewChild,
+  ElementRef,
+  OnInit,
+  inject,
+  DestroyRef,
+  OnChanges,
+  SimpleChanges
+} from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { TranslatePipe } from '@ngx-translate/core';
 import { MatButtonModule } from '@angular/material/button';
 import { MatIconModule } from '@angular/material/icon';
 import { MatFormFieldModule } from '@angular/material/form-field';
 import { MatInputModule } from '@angular/material/input';
-import { FormControl, FormsModule, ReactiveFormsModule } from '@angular/forms';
+import { FormControl, FormsModule, ReactiveFormsModule, StatusChangeEvent, TouchedChangeEvent, Validators } from '@angular/forms';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
+import { noWhitespaceValidator } from '@alfresco/aca-shared';
 
 @Component({
   imports: [CommonModule, TranslatePipe, MatButtonModule, MatIconModule, MatFormFieldModule, MatInputModule, FormsModule, ReactiveFormsModule],
@@ -40,13 +54,20 @@ import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
   encapsulation: ViewEncapsulation.None,
   host: { class: 'app-search-control' }
 })
-export class SearchInputControlComponent implements OnInit {
+export class SearchInputControlComponent implements OnInit, OnChanges {
   private readonly destroyRef = inject(DestroyRef);
 
   /** Type of the input field to render, e.g. "search" or "text" (default). */
   @Input()
   inputType = 'text';
 
+  /**
+   * Indicates whether the search is constrained by libraries.
+   * If true, specific error messaging or validation behavior may be triggered.
+   */
+  @Input()
+  hasLibrariesConstraint = false;
+
   /** Emitted when the search is submitted pressing ENTER button.
    * The search term is provided as value of the event.
    */
@@ -62,10 +83,14 @@ export class SearchInputControlComponent implements OnInit {
   @Output()
   searchChange: EventEmitter<string> = new EventEmitter();
 
+  /** Emitted when the input control has a validation error. */
+  @Output()
+  validationError = new EventEmitter<string>();
+
   @ViewChild('searchInput', { static: true })
   searchInput: ElementRef;
 
-  searchFieldFormControl = new FormControl('');
+  searchFieldFormControl = new FormControl('', [Validators.required, noWhitespaceValidator()]);
 
   get searchTerm(): string {
     return this.searchFieldFormControl.value.replace('text:', 'TEXT:');
@@ -80,11 +105,30 @@ export class SearchInputControlComponent implements OnInit {
       this.searchFieldFormControl.markAsTouched();
       this.searchChange.emit(searchTermValue);
     });
+
+    this.searchFieldFormControl.events.pipe(takeUntilDestroyed(this.destroyRef)).subscribe((event) => {
+      if (event instanceof TouchedChangeEvent || event instanceof StatusChangeEvent) {
+        if (this.searchFieldFormControl.touched) {
+          this.emitValidationError();
+        } else {
+          this.validationError.emit('');
+        }
+      }
+    });
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['hasLibrariesConstraint'] && !changes['hasLibrariesConstraint'].firstChange) {
+      this.emitValidationError();
+    }
   }
 
   searchSubmit() {
-    if (!this.searchFieldFormControl.errors) {
-      this.submit.emit(this.searchTerm);
+    this.searchFieldFormControl.markAsTouched();
+
+    const trimmedTerm = this.searchTerm?.trim();
+    if (this.searchFieldFormControl.valid && trimmedTerm) {
+      this.submit.emit(trimmedTerm);
     }
   }
 
@@ -93,7 +137,24 @@ export class SearchInputControlComponent implements OnInit {
     this.searchChange.emit('');
   }
 
+  onBlur() {
+    this.searchFieldFormControl.markAsUntouched();
+  }
+
   isTermTooShort() {
-    return !!(this.searchTerm && this.searchTerm.length < 2);
+    return this.searchTerm.trim()?.length < 2;
+  }
+
+  emitValidationError(): void {
+    const errors = this.searchFieldFormControl.errors;
+    if (errors?.whitespace) {
+      this.validationError.emit('SEARCH.INPUT.WHITESPACE');
+    } else if (errors?.required) {
+      this.validationError.emit('SEARCH.INPUT.REQUIRED');
+    } else if (this.hasLibrariesConstraint && this.isTermTooShort()) {
+      this.validationError.emit('SEARCH.INPUT.MIN_LENGTH');
+    } else {
+      this.validationError.emit('');
+    }
   }
 }

projects/aca-content/src/lib/components/search/search-input/search-input.component.html

@@ -35,9 +35,12 @@
         (click)="$event.stopPropagation()"
         (submit)="onSearchSubmit($event)"
         (searchChange)="onSearchChange($event)"
+        (validationError)="error = $event"
+        [hasLibrariesConstraint]="hasLibrariesConstraint"
       />
-      <mat-hint *ngIf="hasLibrariesConstraint" class="app-search-hint">{{ 'SEARCH.INPUT.HINT' | translate }}</mat-hint>
-
+      <mat-error *ngIf="error" class="app-search-error">
+        {{ error | translate }}
+      </mat-error>
       <div id="search-options" class="app-search-options">
         <mat-checkbox *ngFor="let option of searchOptions"
           id="{{ option.id }}"

projects/aca-content/src/lib/components/search/search-input/search-input.component.scss

@@ -49,16 +49,18 @@ $search-border-radius: 4px;
 .app-search-options {
   color: var(--theme-text-color);
   border-top: 1px solid var(--theme-divider-color);
-  padding: 10px;
+  padding: 25px;
   display: flex;
   flex-direction: row;
   column-gap: 24px;
 }
 
-.app-search-hint {
+.app-search-error {
   position: absolute;
-  font-size: 12px;
+  gap: 4px;
   padding-left: 17px;
+  margin-top: 4px;
+  font-size: 12px;
 }
 
 @media screen and (max-width: 959px) {

projects/aca-content/src/lib/components/search/search-input/search-input.component.spec.ts

@@ -0,0 +1,150 @@
+/*!
+ * Copyright © 2005-2025 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * Alfresco Example Content Application
+ *
+ * This file is part of the Alfresco Example Content Application.
+ * If the software was purchased under a paid Alfresco license, the terms of
+ * the paid license agreement will prevail. Otherwise, the software is
+ * provided under the following open source license terms:
+ *
+ * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * The Alfresco Example Content Application is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * from Hyland Software. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { UnitTestingUtils } from '@alfresco/adf-core';
+import { MatError } from '@angular/material/form-field';
+import { AppStore } from '@alfresco/aca-shared/store';
+import { AppTestingModule } from '../../../testing/app-testing.module';
+import { SearchInputComponent } from './search-input.component';
+import { Store } from '@ngrx/store';
+import { of } from 'rxjs';
+import { HarnessLoader } from '@angular/cdk/testing';
+import { TestbedHarnessEnvironment } from '@angular/cdk/testing/testbed';
+import { MatMenuHarness } from '@angular/material/menu/testing';
+import { MatCheckboxHarness } from '@angular/material/checkbox/testing';
+
+describe('SearchInputComponent', () => {
+  let fixture: ComponentFixture<SearchInputComponent>;
+  let component: SearchInputComponent;
+  let store: jasmine.SpyObj<Store<AppStore>>;
+  let unitTestingUtils: UnitTestingUtils;
+  let loader: HarnessLoader;
+
+  function getFirstError(): string {
+    const error = unitTestingUtils.getByDirective(MatError);
+    return error?.nativeElement.textContent.trim();
+  }
+
+  async function openMenu(): Promise<MatMenuHarness> {
+    const menu = await loader.getHarness(MatMenuHarness);
+    await menu.open();
+    return menu;
+  }
+
+  function getCheckbox(id: string): Promise<MatCheckboxHarness> {
+    const overlayLoader = TestbedHarnessEnvironment.documentRootLoader(fixture);
+    return overlayLoader.getHarness(MatCheckboxHarness.with({ selector: `#${id}` }));
+  }
+
+  async function uncheckAllCheckboxes() {
+    const checkboxIds = ['libraries', 'folder', 'content'];
+    for (const id of checkboxIds) {
+      try {
+        const checkbox = await getCheckbox(id);
+        if (await checkbox.isChecked()) {
+          await checkbox.uncheck();
+          fixture.detectChanges();
+        }
+      } catch (err) {
+        fail(`Checkbox with id ${id} not found`);
+        throw err;
+      }
+    }
+  }
+
+  beforeEach(async () => {
+    const storeSpy = jasmine.createSpyObj<Store<AppStore>>('Store', ['dispatch', 'pipe']);
+
+    await TestBed.configureTestingModule({
+      imports: [AppTestingModule, SearchInputComponent],
+      providers: [{ provide: Store, useValue: storeSpy }]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(SearchInputComponent);
+    component = fixture.componentInstance;
+    store = TestBed.inject(Store) as jasmine.SpyObj<Store<AppStore>>;
+    store.pipe.and.returnValue(of([]));
+    fixture.detectChanges();
+    unitTestingUtils = new UnitTestingUtils(fixture.debugElement);
+    loader = TestbedHarnessEnvironment.loader(fixture);
+  });
+
+  it('should show required error when field is empty and touched', async () => {
+    await openMenu();
+
+    component.searchInputControl.searchFieldFormControl.setValue('');
+    component.searchInputControl.searchFieldFormControl.markAsTouched();
+    fixture.detectChanges();
+
+    expect(getFirstError()).toBe('SEARCH.INPUT.REQUIRED');
+  });
+
+  it('should not show error when field has value', async () => {
+    await openMenu();
+
+    component.searchInputControl.searchFieldFormControl.setValue('not giving up');
+    component.searchInputControl.searchFieldFormControl.markAsTouched();
+    fixture.detectChanges();
+
+    const error = unitTestingUtils.getByDirective(MatError);
+    expect(error).toBeNull();
+  });
+
+  it('should not show error when field is untouched', async () => {
+    await openMenu();
+
+    component.searchInputControl.searchFieldFormControl.setValue('');
+    component.searchInputControl.searchFieldFormControl.markAsUntouched();
+    fixture.detectChanges();
+
+    const error = unitTestingUtils.getByDirective(MatError);
+    expect(error).toBeNull();
+  });
+
+  it('should dispatch action when Libraries checkbox selected and term is entered', async () => {
+    await openMenu();
+    const checkbox = await getCheckbox('libraries');
+    await checkbox.check();
+    fixture.detectChanges();
+
+    component.onSearchSubmit({ target: { value: 'happy faces only' } });
+    expect(store.dispatch).toHaveBeenCalled();
+  });
+
+  it('should not dispatch SearchByTermAction when no checkboxes are selected and term is empty', async () => {
+    store.dispatch.calls.reset();
+
+    await openMenu();
+    await uncheckAllCheckboxes();
+
+    expect(component.searchOptions.every((option) => !option.value)).toBeTrue();
+
+    component.searchedWord = '';
+    fixture.detectChanges();
+
+    component.onSearchSubmit({ target: { value: '' } });
+    expect(store.dispatch).not.toHaveBeenCalled();
+  });
+});

projects/aca-content/src/lib/components/search/search-input/search-input.component.ts

@@ -73,6 +73,8 @@ export class SearchInputComponent implements OnInit, OnDestroy {
   has400LibraryError = false;
   hasLibrariesConstraint = false;
   searchOnChange: boolean;
+  isTrimmedWordEmpty = false;
+  error = '';
 
   searchedWord: string = null;
   searchOptions: Array<SearchOptionModel> = [
@@ -151,8 +153,8 @@ export class SearchInputComponent implements OnInit, OnDestroy {
   showInputValue() {
     this.appService.setAppNavbarMode('collapsed');
     this.has400LibraryError = false;
-    this.hasLibrariesConstraint = this.evaluateLibrariesConstraint();
     this.searchedWord = this.getUrlSearchTerm();
+    this.hasLibrariesConstraint = this.evaluateLibrariesConstraint();
 
     if (this.searchInputControl) {
       this.searchInputControl.searchTerm = this.searchedWord;
@@ -177,17 +179,22 @@ export class SearchInputComponent implements OnInit, OnDestroy {
    */
   onSearchSubmit(event: any) {
     const searchTerm = event.target ? (event.target as HTMLInputElement).value : event;
-    if (searchTerm) {
-      this.searchedWord = searchTerm;
+    const trimmedTerm = searchTerm.trim();
 
+    if (trimmedTerm) {
+      this.searchedWord = trimmedTerm;
+      if (this.isLibrariesChecked() && this.searchInputControl.isTermTooShort()) {
+        return;
+      } else {
         this.searchByOption();
+      }
     } else {
       this.notificationService.showError('APP.BROWSE.SEARCH.EMPTY_SEARCH');
     }
 
-    if (this.trigger) {
-      this.trigger.closeMenu();
-    }
+    setTimeout(() => {
+      this.trigger?.closeMenu();
+    });
   }
 
   onSearchChange(searchTerm: string) {
@@ -196,15 +203,26 @@ export class SearchInputComponent implements OnInit, OnDestroy {
     }
 
     this.has400LibraryError = false;
-    this.hasLibrariesConstraint = this.evaluateLibrariesConstraint();
     this.searchedWord = searchTerm;
+    this.hasLibrariesConstraint = this.evaluateLibrariesConstraint();
   }
 
   searchByOption() {
     this.syncInputValues();
     this.has400LibraryError = false;
+
+    this.searchInputControl.emitValidationError();
+
+    if (!this.searchedWord.trim()) {
+      return;
+    }
+
     if (this.isLibrariesChecked()) {
       this.hasLibrariesConstraint = this.evaluateLibrariesConstraint();
+
+      if (this.hasLibrariesConstraint) {
+        return;
+      }
       if (this.onLibrariesSearchResults && this.isSameSearchTerm()) {
         this.queryLibrariesBuilder.update();
       } else if (this.searchedWord) {

projects/aca-shared/src/lib/validators/no-whitespace.validator.spec.ts

@@ -0,0 +1,50 @@
+/*!
+ * Copyright © 2005-2025 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * Alfresco Example Content Application
+ *
+ * This file is part of the Alfresco Example Content Application.
+ * If the software was purchased under a paid Alfresco license, the terms of
+ * the paid license agreement will prevail. Otherwise, the software is
+ * provided under the following open source license terms:
+ *
+ * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * The Alfresco Example Content Application is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * from Hyland Software. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import { FormControl } from '@angular/forms';
+import { noWhitespaceValidator } from './no-whitespace.validator';
+
+describe('noWhitespaceValidator', () => {
+  const validatorFn = noWhitespaceValidator();
+
+  it('should return null for valid non-whitespace input', () => {
+    const control = new FormControl('valid input');
+    expect(validatorFn(control)).toBeNull();
+  });
+
+  it('should return error for input with only spaces', () => {
+    const control = new FormControl('    ');
+    expect(validatorFn(control)).toEqual({ whitespace: true });
+  });
+
+  it('should return error for empty string', () => {
+    const control = new FormControl('');
+    expect(validatorFn(control)).toBeNull();
+  });
+
+  it('should return null for input with leading and trailing spaces but valid content inside', () => {
+    const control = new FormControl('   valid   ');
+    expect(validatorFn(control)).toBeNull();
+  });
+});

projects/aca-shared/src/lib/validators/no-whitespace.validator.ts

@@ -0,0 +1,37 @@
+/*!
+ * Copyright © 2005-2025 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * Alfresco Example Content Application
+ *
+ * This file is part of the Alfresco Example Content Application.
+ * If the software was purchased under a paid Alfresco license, the terms of
+ * the paid license agreement will prevail. Otherwise, the software is
+ * provided under the following open source license terms:
+ *
+ * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * The Alfresco Example Content Application is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * from Hyland Software. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
+
+export const noWhitespaceValidator = (): ValidatorFn => {
+  return (control: AbstractControl): ValidationErrors | null => {
+    const rawValue = control.value;
+    if (!rawValue) {
+      return null;
+    }
+
+    const trimmedValue = rawValue.toString().trim();
+    return trimmedValue.length === 0 ? { whitespace: true } : null;
+  };
+};

projects/aca-shared/src/public-api.ts

@@ -40,6 +40,7 @@ export * from './lib/components/document-base-page/document-base-page.component'
 export * from './lib/components/document-base-page/document-base-page.service';
 export * from './lib/components/open-in-app/open-in-app.component';
 export * from './lib/constants';
+
 export * from './lib/directives/contextmenu/contextmenu.directive';
 export * from './lib/directives/pagination.directive';
 
@@ -60,5 +61,8 @@ export * from './lib/services/app-settings.service';
 export * from './lib/services/user-profile.service';
 export * from './lib/services/navigation-history.service';
 
-export * from './lib/utils/node.utils';
 export * from './lib/testing/lib-testing-module';
+
+export * from './lib/utils/node.utils';
+
+export * from './lib/validators/no-whitespace.validator';