[PM-19998] Add arrow icons to vault carousel component (#16041)

* Add arrow icons to vault carousel component

* Fix carousel next button and update tests

* Add new unit tests for back/next buttons

* Copy 'next' string from web/src/locales to browser/src/_locales

* Fix layout / spacing on carousel arrows

* Remove 'next' string from non-en locales

* Fix lint errors on carousel tests

* Add I18n provider to storybook for carousel

* Fix spacing for carousel button row

* Update carousel arrows to use small icon variant

* Add label attr to carousel buttons

* Add next string to locales  for Desktop

apps/browser/src/_locales/en/messages.json

@@ -5588,6 +5588,9 @@
   "showLess": {
     "message": "Show less"
   },
+  "next": {
+    "message": "Next"
+  },
   "moreBreadcrumbs": {
     "message": "More breadcrumbs",
     "description": "This is used in the context of a breadcrumb navigation, indicating that there are more items in the breadcrumb trail that are not currently displayed."

apps/desktop/src/locales/en/messages.json

@@ -4080,5 +4080,8 @@
   "moreBreadcrumbs": {
     "message": "More breadcrumbs",
     "description": "This is used in the context of a breadcrumb navigation, indicating that there are more items in the breadcrumb trail that are not currently displayed."
+  },
+  "next": {
+    "message": "Next"
   }
 }

libs/vault/src/components/carousel/carousel.component.html

@@ -6,18 +6,40 @@
   #container
 >
   <vault-carousel-content [content]="slides.get(selectedIndex)?.content"></vault-carousel-content>
-  <div
-    class="tw-w-full tw-flex tw-gap-2 tw-justify-center tw-mt-auto tw-pt-4"
-    role="tablist"
-    (keydown)="keyManager.onKeydown($event)"
-    #carouselButtonWrapper
-  >
-    <vault-carousel-button
-      *ngFor="let slide of slides; let i = index"
-      [slide]="slide"
-      [isActive]="i === selectedIndex"
-      (onClick)="selectSlide(i)"
-    ></vault-carousel-button>
+  <div class="tw-w-full tw-flex tw-justify-between tw-mt-auto tw-px-4 tw-pb-2 tw-pt-4">
+    <button
+      type="button"
+      bitIconButton="bwi-angle-left"
+      class="tw-size-6 tw-p-0 tw-flex tw-items-center tw-justify-center"
+      size="small"
+      [attr.label]="'back' | i18n"
+      (click)="prevSlide()"
+      [disabled]="selectedIndex <= 0"
+      appA11yTitle="{{ 'back' | i18n }}"
+    ></button>
+    <div
+      class="tw-w-full tw-flex tw-gap-2 tw-justify-center tw-mt-auto"
+      role="tablist"
+      (keydown)="keyManager.onKeydown($event)"
+      #carouselButtonWrapper
+    >
+      <vault-carousel-button
+        *ngFor="let slide of slides; let i = index"
+        [slide]="slide"
+        [isActive]="i === selectedIndex"
+        (onClick)="selectSlide(i)"
+      ></vault-carousel-button>
+    </div>
+    <button
+      type="button"
+      bitIconButton="bwi-angle-right"
+      class="tw-size-6 tw-p-0 tw-flex tw-items-center tw-justify-center"
+      [attr.label]="'next' | i18n"
+      size="small"
+      (click)="nextSlide()"
+      [disabled]="selectedIndex >= slides.length - 1"
+      appA11yTitle="{{ 'next' | i18n }}"
+    ></button>
   </div>
   <div class="tw-absolute tw-invisible" #tempSlideContainer *ngIf="minHeight === null">
     <ng-template cdkPortalOutlet></ng-template>

libs/vault/src/components/carousel/carousel.component.spec.ts

@@ -2,6 +2,8 @@ import { Component } from "@angular/core";
 import { ComponentFixture, TestBed } from "@angular/core/testing";
 import { By } from "@angular/platform-browser";
 
+import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
+
 import { VaultCarouselSlideComponent } from "./carousel-slide/carousel-slide.component";
 import { VaultCarouselComponent } from "./carousel.component";
 
@@ -33,6 +35,7 @@ describe("VaultCarouselComponent", () => {
   beforeEach(async () => {
     await TestBed.configureTestingModule({
       imports: [VaultCarouselComponent, VaultCarouselSlideComponent],
+      providers: [{ provide: I18nService, useValue: { t: (key: string) => key } }],
     }).compileComponents();
   });
 
@@ -48,7 +51,7 @@ describe("VaultCarouselComponent", () => {
 
   it("shows the active slides content", () => {
     // Set the second slide as active
-    fixture.debugElement.queryAll(By.css("button"))[1].nativeElement.click();
+    fixture.debugElement.queryAll(By.css("button"))[2].nativeElement.click();
     fixture.detectChanges();
 
     const heading = fixture.debugElement.query(By.css("h1")).nativeElement;
@@ -63,10 +66,37 @@ describe("VaultCarouselComponent", () => {
   it('emits "slideChange" event when slide changes', () => {
     jest.spyOn(component.slideChange, "emit");
 
-    const thirdSlideButton = fixture.debugElement.queryAll(By.css("button"))[2];
+    const thirdSlideButton = fixture.debugElement.queryAll(By.css("button"))[3];
 
     thirdSlideButton.nativeElement.click();
 
     expect(component.slideChange.emit).toHaveBeenCalledWith(2);
   });
+
+  it('advances to the next slide when the "next" button is pressed', () => {
+    const middleSlideButton = fixture.debugElement.queryAll(By.css("button"))[2];
+    const nextButton = fixture.debugElement.queryAll(By.css("button"))[4];
+
+    middleSlideButton.nativeElement.click();
+
+    jest.spyOn(component.slideChange, "emit");
+
+    nextButton.nativeElement.click();
+
+    expect(component.slideChange.emit).toHaveBeenCalledWith(2);
+  });
+
+  it('advances to the previous slide when the "back" button is pressed', async () => {
+    const middleSlideButton = fixture.debugElement.queryAll(By.css("button"))[2];
+    const backButton = fixture.debugElement.queryAll(By.css("button"))[0];
+
+    middleSlideButton.nativeElement.click();
+    await new Promise((r) => setTimeout(r, 100)); // Give time for the DOM to update.
+
+    jest.spyOn(component.slideChange, "emit");
+
+    backButton.nativeElement.click();
+
+    expect(component.slideChange.emit).toHaveBeenCalledWith(0);
+  });
 });

libs/vault/src/components/carousel/carousel.component.ts

@@ -20,7 +20,9 @@ import {
 import { takeUntilDestroyed } from "@angular/core/rxjs-interop";
 import { take } from "rxjs";
 
-import { ButtonModule } from "@bitwarden/components";
+import { JslibModule } from "@bitwarden/angular/jslib.module";
+import { ButtonModule, IconButtonModule } from "@bitwarden/components";
+import { I18nPipe } from "@bitwarden/ui-common";
 
 import { VaultCarouselButtonComponent } from "./carousel-button/carousel-button.component";
 import { VaultCarouselContentComponent } from "./carousel-content/carousel-content.component";
@@ -32,9 +34,12 @@ import { VaultCarouselSlideComponent } from "./carousel-slide/carousel-slide.com
   imports: [
     CdkPortalOutlet,
     CommonModule,
+    JslibModule,
+    IconButtonModule,
     ButtonModule,
     VaultCarouselContentComponent,
     VaultCarouselButtonComponent,
+    I18nPipe,
   ],
 })
 export class VaultCarouselComponent implements AfterViewInit {
@@ -97,6 +102,18 @@ export class VaultCarouselComponent implements AfterViewInit {
     this.slideChange.emit(index);
   }
 
+  protected nextSlide() {
+    if (this.selectedIndex < this.slides.length - 1) {
+      this.selectSlide(this.selectedIndex + 1);
+    }
+  }
+
+  protected prevSlide() {
+    if (this.selectedIndex > 0) {
+      this.selectSlide(this.selectedIndex - 1);
+    }
+  }
+
   async ngAfterViewInit() {
     this.keyManager = new FocusKeyManager(this.carouselButtons)
       .withHorizontalOrientation("ltr")

libs/vault/src/components/carousel/carousel.stories.ts

@@ -1,5 +1,6 @@
 import { Meta, moduleMetadata, StoryObj } from "@storybook/angular";
 
+import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
 import { ButtonComponent, TypographyModule } from "@bitwarden/components";
 
 import { VaultCarouselSlideComponent } from "./carousel-slide/carousel-slide.component";
@@ -11,6 +12,7 @@ export default {
   decorators: [
     moduleMetadata({
       imports: [VaultCarouselSlideComponent, TypographyModule, ButtonComponent],
+      providers: [{ provide: I18nService, useValue: { t: (key: string) => key } }],
     }),
   ],
 } as Meta;