MOBILE-3745 buttons: Implement user avatar as a button

src/core/classes/aria-role-button.ts

@@ -0,0 +1,68 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+export abstract class CoreAriaRoleButton<T = unknown> {
+
+    componentInstance: T;
+
+    constructor(componentInstance: T) {
+        this.componentInstance = componentInstance;
+    }
+
+    /**
+     * A11y key functionallity that prevents keyDown events.
+     *
+     * @param event Event.
+     */
+    keyDown(event: KeyboardEvent): void {
+        if ((event.key == ' ' || event.key == 'Enter') && this.isAllowed()) {
+            event.preventDefault();
+            event.stopPropagation();
+        }
+    }
+
+    /**
+     * A11y key functionallity that translates space and enter keys to click action.
+     *
+     * @param event Event.
+     */
+    keyUp(event: KeyboardEvent): void {
+        if ((event.key == ' ' || event.key == 'Enter') && this.isAllowed()) {
+            event.preventDefault();
+            event.stopPropagation();
+
+            this.click(event);
+        }
+    }
+
+    /**
+     * A11y click functionallity.
+     *
+     * @param event Event.
+     */
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    click(event?: Event): void {
+        // Nothing defined here.
+    }
+
+    /**
+     * Checks if action is allowed in class.
+     *
+     * @returns If allowed.
+     */
+    isAllowed(): boolean {
+        return true;
+    }
+
+}

src/core/components/user-avatar/core-user-avatar.html

@@ -1,10 +1,16 @@
 <img *ngIf="avatarUrl" [src]="avatarUrl" [alt]="'core.pictureof' | translate:{$a: fullname}" core-external-content
-    onError="this.src='assets/img/user-avatar.png'" (click)="gotoProfile($event)">
+    onError="this.src='assets/img/user-avatar.png'" (click)="gotoProfile($event)" [attr.aria-hidden]="!linkProfile"
+    [attr.role]="linkProfile ? 'button' : null" (keydown)="buttonAction.keyDown($event)"
+    (keyup)="buttonAction.keyUp($event)"
+    [attr.tabindex]="linkProfile ? 0 : null">
 
 <img *ngIf="!avatarUrl" src="assets/img/user-avatar.png" [alt]="'core.pictureof' | translate:{$a: fullname}"
-    (click)="gotoProfile($event)">
+    (click)="gotoProfile($event)" [attr.aria-hidden]="!linkProfile" [attr.role]="linkProfile ? 'button' : null"
+    (keydown)="buttonAction.keyDown($event)" (keyup)="buttonAction.keyUp($event)"
+    [attr.tabindex]="linkProfile ? 0 : null">
 
-<span *ngIf="checkOnline && isOnline()" class="contact-status online"></span>
+<span *ngIf="checkOnline && isOnline()" class="contact-status online" role="status" [attr.aria-label]="'core.online' | translate">
+</span>
 
 <img *ngIf="extraIcon" [src]="extraIcon" alt="" role="presentation" class="core-avatar-extra-icon">
 

src/core/components/user-avatar/user-avatar.ts

@@ -20,6 +20,7 @@ import { CoreUtils } from '@services/utils/utils';
 import { CoreEventObserver, CoreEvents } from '@singletons/events';
 import { CoreUserProvider, CoreUserBasicData } from '@features/user/services/user';
 import { CoreNavigator } from '@services/navigator';
+import { CoreAriaRoleButton } from '@classes/aria-role-button';
 
 /**
  * Component to display a "user avatar".
@@ -36,15 +37,17 @@ export class CoreUserAvatarComponent implements OnInit, OnChanges, OnDestroy {
     @Input() user?: CoreUserWithAvatar;
     // The following params will override the ones in user object.
     @Input() profileUrl?: string;
-    @Input() protected linkProfile = true; // Avoid linking to the profile if wanted.
+    @Input() linkProfile = true; // Avoid linking to the profile if wanted.
     @Input() fullname?: string;
-    @Input() protected userId?: number; // If provided or found it will be used to link the image to the profile.
-    @Input() protected courseId?: number;
+    @Input() userId?: number; // If provided or found it will be used to link the image to the profile.
+    @Input() courseId?: number;
     @Input() checkOnline = false; // If want to check and show online status.
     @Input() extraIcon?: string; // Extra icon to show near the avatar.
 
     avatarUrl?: string;
 
+    buttonAction: CoreUserAvatarButton;
+
     // Variable to check if we consider this user online or not.
     // @TODO: Use setting when available (see MDL-63972) so we can use site setting.
     protected timetoshowusers = 300000; // Miliseconds default.
@@ -52,6 +55,7 @@ export class CoreUserAvatarComponent implements OnInit, OnChanges, OnDestroy {
     protected pictureObserver: CoreEventObserver;
 
     constructor() {
+
         this.currentUserId = CoreSites.getCurrentSiteUserId();
 
         this.pictureObserver = CoreEvents.on(
@@ -63,12 +67,15 @@ export class CoreUserAvatarComponent implements OnInit, OnChanges, OnDestroy {
             },
             CoreSites.getCurrentSiteId(),
         );
+
+        this.buttonAction = new CoreUserAvatarButton(this);
     }
 
     /**
      * Component being initialized.
      */
     ngOnInit(): void {
+
         this.setFields();
     }
 
@@ -130,19 +137,14 @@ export class CoreUserAvatarComponent implements OnInit, OnChanges, OnDestroy {
      * @param event Click event.
      */
     gotoProfile(event: Event): void {
-        if (!this.linkProfile || !this.userId) {
+        if (!this.buttonAction.isAllowed()) {
             return;
         }
 
         event.preventDefault();
         event.stopPropagation();
 
-        CoreNavigator.navigateToSitePath('user', {
-            params: {
-                userId: this.userId,
-                courseId: this.courseId,
-            },
-        });
+        this.buttonAction.click();
     }
 
     /**
@@ -154,6 +156,32 @@ export class CoreUserAvatarComponent implements OnInit, OnChanges, OnDestroy {
 
 }
 
+/**
+ * Helper class to manage rol button.
+ */
+class CoreUserAvatarButton extends CoreAriaRoleButton<CoreUserAvatarComponent> {
+
+    /**
+     * @inheritdoc
+     */
+    click(): void {
+        CoreNavigator.navigateToSitePath('user', {
+            params: {
+                userId: this.componentInstance.userId,
+                courseId: this.componentInstance.courseId,
+            },
+        });
+    }
+
+    /**
+     * @inheritdoc
+     */
+    isAllowed(): boolean {
+        return this.componentInstance.linkProfile && !!this.componentInstance.userId;
+    }
+
+}
+
 /**
  * Type with all possible formats of user.
  */