[ACS-4749] add button is enabled for comment contains only spaces (#10577)

* [ACS-4749] Disabled add button for comment when comment has only spaces

* [ACS-4749] Unit tests

* [ACS-4749] Removed redundant code

* [ACS-4749] Fixed sonar issue

* [ACS-4749] Resolved issues after rebase

* [ACS-4749] Addressed PR comment

lib/core/src/lib/comments/comments.component.html

@@ -8,22 +8,22 @@
                     matInput
                     id="comment-input"
                     class="adf-text-text-area"
-                    [placeholder]='"COMMENTS.ADD" | translate'
+                    [placeholder]='("COMMENTS.ADD" | translate) + "*"'
                     [attr.aria-label]="'COMMENTS.ADD' | translate"
-                    [(ngModel)]="message"
+                    [formControl]="commentControl"
                     (keydown.escape)="clearMessage($event)"
                 >
                 </textarea>
+                <mat-error *ngIf="commentControl.invalid && commentControl.touched">{{ 'COMMENTS.EMPTY_ERROR' | translate }}</mat-error>
             </mat-form-field>
 
             <div class="adf-comments-input-actions">
                 <button
                     mat-button
-                    class="adf-comments-input-add"
                     data-automation-id="comments-input-add"
                     color="primary"
                     (click)="addComment()"
-                    [disabled]="!message"
+                    [disabled]="commentControl.invalid"
                 >
                     {{ 'COMMENTS.ADD' | translate }}
                 </button>

lib/core/src/lib/comments/comments.component.scss

@@ -12,10 +12,15 @@ adf-comments {
 
             #{$mat-form-field} {
                 width: 100%;
-            }
 
-            #{$mat-form-field-subscript-wrapper} {
-                display: none;
+                &#{$mat-form-field-invalid} {
+                    #{$mat-input-element} {
+                        &::placeholder,
+                        &:focus::placeholder {
+                            color: var(--theme-warn-color);
+                        }
+                    }
+                }
             }
 
             #{$mat-form-field-wrapper} {

lib/core/src/lib/comments/comments.component.spec.ts

@@ -25,6 +25,7 @@ import { CommentsService } from './interfaces/comments-service.interface';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
 import { NoopTranslateModule } from '../testing/noop-translate.module';
 import { UnitTestingUtils } from '../testing/unit-testing-utils';
+import { MatError } from '@angular/material/form-field';
 
 describe('CommentsComponent', () => {
     let component: CommentsComponent;
@@ -156,6 +157,10 @@ describe('CommentsComponent', () => {
     });
 
     describe('Add comment', () => {
+        const getError = (): string => testingUtils.getByDirective(MatError)?.nativeElement?.textContent;
+
+        const getAddCommentButton = (): HTMLButtonElement => testingUtils.getByDataAutomationId('comments-input-add').nativeElement;
+
         beforeEach(() => {
             component.id = '123';
             fixture.detectChanges();
@@ -163,8 +168,8 @@ describe('CommentsComponent', () => {
         });
 
         it('should normalize comment when user input contains spaces sequence', async () => {
-            component.message = 'test comment';
-            testingUtils.clickByCSS('.adf-comments-input-add');
+            component.commentControl.setValue('test comment');
+            getAddCommentButton().dispatchEvent(new Event('click'));
 
             fixture.detectChanges();
             await fixture.whenStable();
@@ -184,8 +189,8 @@ describe('CommentsComponent', () => {
             getCommentSpy.and.returnValue(of([]));
             addCommentSpy.and.returnValue(commentsResponseMock.addComment(commentText));
 
-            component.message = commentText;
-            testingUtils.clickByCSS('.adf-comments-input-add');
+            component.commentControl.setValue(commentText);
+            getAddCommentButton().dispatchEvent(new Event('click'));
 
             fixture.detectChanges();
             await fixture.whenStable();
@@ -195,9 +200,10 @@ describe('CommentsComponent', () => {
         });
 
         it('should call service to add a comment when add button is pressed', async () => {
-            component.message = 'Test Comment';
-            addCommentSpy.and.returnValue(commentsResponseMock.addComment(component.message));
-            testingUtils.clickByCSS('.adf-comments-input-add');
+            const comment = 'Test Comment';
+            component.commentControl.setValue(comment);
+            addCommentSpy.and.returnValue(commentsResponseMock.addComment(comment));
+            getAddCommentButton().dispatchEvent(new Event('click'));
 
             fixture.detectChanges();
             await fixture.whenStable();
@@ -209,8 +215,8 @@ describe('CommentsComponent', () => {
         });
 
         it('should not call service to add a comment when comment is empty', async () => {
-            component.message = '';
-            testingUtils.clickByCSS('.adf-comments-input-add');
+            component.commentControl.setValue('');
+            getAddCommentButton().dispatchEvent(new Event('click'));
 
             fixture.detectChanges();
             await fixture.whenStable();
@@ -231,7 +237,7 @@ describe('CommentsComponent', () => {
         it('should emit an error when an error occurs adding the comment', () => {
             const emitSpy = spyOn(component.error, 'emit');
             addCommentSpy.and.returnValue(throwError(() => new Error('error')));
-            component.message = 'Test comment';
+            component.commentControl.setValue('Test comment');
             component.addComment();
             expect(emitSpy).toHaveBeenCalled();
         });
@@ -255,9 +261,85 @@ describe('CommentsComponent', () => {
         });
 
         it('should not add comment if message is empty', () => {
-            component.message = '';
+            component.commentControl.setValue('');
             component.addComment();
             expect(addCommentSpy).not.toHaveBeenCalled();
         });
+
+        it('should not display error message initially', () => {
+            expect(getError()).toBeUndefined();
+        });
+
+        it('should display error message when comment is empty and was touched', () => {
+            component.commentControl.setValue('');
+            component.commentControl.markAsTouched();
+
+            fixture.detectChanges();
+            expect(getError()).toBe('COMMENTS.EMPTY_ERROR');
+        });
+
+        it('should display error message when comment has only spaces and was touched', () => {
+            component.commentControl.setValue('    ');
+            component.commentControl.markAsTouched();
+
+            fixture.detectChanges();
+            expect(getError()).toBe('COMMENTS.EMPTY_ERROR');
+        });
+
+        it('should not display error message when comment is empty but was not touched', () => {
+            component.commentControl.setValue('');
+
+            fixture.detectChanges();
+            expect(getError()).toBeUndefined();
+        });
+
+        it('should not display error message when comment has only spaces but was not touched', () => {
+            component.commentControl.setValue('    ');
+
+            fixture.detectChanges();
+            expect(getError()).toBeUndefined();
+        });
+
+        it('should not display error message when comment is not empty and was touched', () => {
+            component.commentControl.setValue('Some comment');
+            component.commentControl.markAsTouched();
+
+            fixture.detectChanges();
+            expect(getError()).toBeUndefined();
+        });
+
+        it('should not display error message when comment is not empty and was not touched', () => {
+            component.commentControl.setValue('Some comment');
+
+            fixture.detectChanges();
+            expect(getError()).toBeUndefined();
+        });
+
+        it('should disable add button initially', () => {
+            expect(getAddCommentButton().disabled).toBeTrue();
+        });
+
+        it('should disable add button when comment is empty', () => {
+            component.commentControl.setValue('Some comment');
+            component.commentControl.setValue('');
+
+            fixture.detectChanges();
+            expect(getAddCommentButton().disabled).toBeTrue();
+        });
+
+        it('should disable add button when comment has only spaces', () => {
+            component.commentControl.setValue('Some comment');
+            component.commentControl.setValue('    ');
+
+            fixture.detectChanges();
+            expect(getAddCommentButton().disabled).toBeTrue();
+        });
+
+        it('should enable add button when comment is not empty', () => {
+            component.commentControl.setValue('Some comment');
+
+            fixture.detectChanges();
+            expect(getAddCommentButton().disabled).toBeFalse();
+        });
     });
 });

lib/core/src/lib/comments/comments.component.ts

@@ -23,14 +23,23 @@ import { CommonModule } from '@angular/common';
 import { TranslateModule } from '@ngx-translate/core';
 import { MatFormFieldModule } from '@angular/material/form-field';
 import { MatInputModule } from '@angular/material/input';
-import { FormsModule } from '@angular/forms';
+import { FormControl, FormsModule, ReactiveFormsModule, ValidationErrors } from '@angular/forms';
 import { MatButtonModule } from '@angular/material/button';
 import { CommentListComponent } from './comment-list';
 
 @Component({
     selector: 'adf-comments',
     standalone: true,
-    imports: [CommonModule, TranslateModule, MatFormFieldModule, MatInputModule, FormsModule, MatButtonModule, CommentListComponent],
+    imports: [
+        CommonModule,
+        TranslateModule,
+        MatFormFieldModule,
+        MatInputModule,
+        FormsModule,
+        MatButtonModule,
+        CommentListComponent,
+        ReactiveFormsModule
+    ],
     templateUrl: './comments.component.html',
     styleUrls: ['./comments.component.scss'],
     encapsulation: ViewEncapsulation.None
@@ -49,11 +58,16 @@ export class CommentsComponent implements OnChanges {
     error = new EventEmitter<any>();
 
     comments: CommentModel[] = [];
-    message: string;
     beingAdded: boolean = false;
 
     private commentsService = inject<CommentsService>(ADF_COMMENTS_SERVICE);
 
+    private readonly _commentControl = new FormControl('', [this.validateEmptyComment]);
+
+    get commentControl(): FormControl<string> {
+        return this._commentControl;
+    }
+
     ngOnChanges(changes: SimpleChanges): void {
         this.id = null;
 
@@ -95,10 +109,10 @@ export class CommentsComponent implements OnChanges {
 
         this.beingAdded = true;
 
-        this.commentsService.add(this.id, this.message).subscribe({
+        this.commentsService.add(this.id, this.commentControl.value).subscribe({
             next: (res) => {
                 this.addToComments(res);
-                this.resetMessage();
+                this.commentControl.reset();
             },
             error: (err) => {
                 this.error.emit(err);
@@ -111,19 +125,15 @@ export class CommentsComponent implements OnChanges {
 
     clearMessage(event: Event): void {
         event.stopPropagation();
-        this.resetMessage();
+        this.commentControl.reset();
     }
 
     private addToComments(comment: CommentModel): void {
         this.comments.unshift(comment);
     }
 
-    private resetMessage(): void {
-        this.message = '';
-    }
-
     private canAddComment(): boolean {
-        return this.hasId() && this.message && this.message.trim() && !this.beingAdded;
+        return this.hasId() && this.commentControl.value?.trim() && !this.beingAdded;
     }
 
     private hasId(): boolean {
@@ -146,4 +156,8 @@ export class CommentsComponent implements OnChanges {
     private resetComments(): void {
         this.comments = [];
     }
+
+    private validateEmptyComment(commentControl: FormControl<string>): ValidationErrors {
+        return commentControl.value?.trim() ? null : { emptyComment: true };
+    }
 }

lib/core/src/lib/i18n/en.json

@@ -306,6 +306,7 @@
     "HEADER": "Comments ({{ count }})",
     "CREATED_BY_HEADER": "Created by",
     "MESSAGE_HEADER": "Message",
+    "EMPTY_ERROR": "Comment can't be empty",
     "DIALOG": {
       "TITLE": "New comment",
       "LABELS": {