Merge pull request 'Notifications' (#12) from feature/notifications into trunk

Reviewed-on: #12
Reviewed-by: SZUT-Rajbir <rajbir2@schule.bremen.de>

src/app/app.component.html

@@ -1,3 +1,3 @@
 <app-header></app-header>
-
+<app-notification-box></app-notification-box>
 <router-outlet/>

src/app/app.component.ts

@@ -2,9 +2,11 @@ import {Component} from '@angular/core';
 import {RouterOutlet} from '@angular/router';
 import {HeaderComponent} from '@app/header/header.component';
 
+import { NotificationBoxComponent } from './notification-box/notification-box.component';
+
 @Component({
     selector: 'app-root',
-    imports: [RouterOutlet, HeaderComponent],
+    imports: [RouterOutlet, HeaderComponent, NotificationBoxComponent],
     templateUrl: './app.component.html',
     styleUrl: './app.component.scss'
 })

src/app/core/notification/notification.service.ts

@@ -0,0 +1,37 @@
+import { Injectable } from '@angular/core';
+import { Subject, Subscription } from 'rxjs';
+
+export interface Notification {
+    msg: string;
+    type: NotificationType;
+}
+
+export enum NotificationType {
+    Information = 'info',
+    Error = 'error',
+}
+
+export type NotificationCallback = (notification: Notification) => void;
+
+@Injectable({ providedIn: 'root' })
+export class NotificationService {
+    private readonly bus: Subject<Notification> = new Subject();
+    private readonly subscribers: Map<string, Subscription> = new Map<string, Subscription>();
+
+    subscribe(subscriberId: string, callback: NotificationCallback): void {
+        this.subscribers.set(
+            subscriberId,
+            this.bus.subscribe({
+                next: callback
+            })
+        );
+    }
+
+    publish(msg: string, type: NotificationType = NotificationType.Information) {
+        this.bus.next({ msg, type });
+    }
+
+    unsubscribe(subscriberId: string) {
+        this.subscribers.get(subscriberId)?.unsubscribe();
+    }
+}

src/app/header/header.component.html

@@ -7,8 +7,6 @@
         <a mat-button href="{{ route.path }}" class="{{ route.class }}">{{ route.title }}</a>
         }
     </nav>
-
-
     @if (auth.$user|async; as user) {
     <a mat-button href="https://keycloak.szut.dev/auth/realms/szut/account">
         {{ user.username|titlecase }}

src/app/header/header.component.scss

@@ -1,6 +1,4 @@
 .header {
-  position: sticky;
-  top: 0;
   margin: 0;
   padding: 0.5rem 1rem;
   z-index: 100;
@@ -31,3 +29,4 @@
     min-width: fit-content;
   }
 }
+

src/app/notification-box/notification-box.component.html

@@ -0,0 +1,7 @@
+<div class="notification-box">
+    @for (notification of notifications.values(); track notification){
+    <mat-card class="notification-box__card {{notification.type}}" [@slideInOut]>
+        <mat-card-content>{{notification.msg}}</mat-card-content>
+    </mat-card>
+    }
+</div>

src/app/notification-box/notification-box.component.scss

@@ -0,0 +1,31 @@
+.notification-box {
+  position: absolute;
+  z-index: 100;
+  right: 0;
+  top: 3.5rem; // Header Height
+
+  width: 15%;
+  min-width: 20rem;
+
+  display: flex;
+  flex-direction: column;
+  padding: 0.5rem;
+  gap: 0.5rem;
+
+  overflow: hidden;
+
+  &__card {
+    width: 100%;
+    box-sizing: border-box;
+
+    &.info {
+      color: var(--mat-sys-tertiary);
+      background-color: var(--mat-sys-tertiary-container);
+    }
+
+    &.error {
+      color: var(--mat-sys-error);
+      background-color: var(--mat-sys-error-container);
+    }
+  }
+}

src/app/notification-box/notification-box.component.ts

@@ -0,0 +1,41 @@
+import { animate, style, transition, trigger } from '@angular/animations';
+import { Component, OnInit } from '@angular/core';
+import { MatCard, MatCardContent } from '@angular/material/card';
+import { Notification, NotificationService } from '@core/notification/notification.service';
+
+const NOTIFICATION_TTL = 3000;
+
+@Component({
+    selector: 'app-notification-box',
+    imports: [MatCard, MatCardContent],
+    animations: [
+        trigger('slideInOut', [
+            transition(':enter', [
+                style({ transform: 'translateX(100%)' }),
+                animate('200ms ease-in-out', style({ transform: 'translateX(0)' })),
+            ]),
+            transition(':leave', [animate('200ms ease-in-out', style({ transform: 'translateX(100%)' })),])
+        ]),
+    ],
+    templateUrl: './notification-box.component.html',
+    styleUrl: './notification-box.component.scss'
+})
+export class NotificationBoxComponent implements OnInit {
+    notifications: Map<number, Notification> = new Map();
+
+    constructor(private notificationService: NotificationService) {
+    }
+
+    ngOnInit(): void {
+        this.notificationService.subscribe('notification-box', this.onNotification.bind(this));
+    }
+
+    onNotification(notification: Notification): void {
+        const now = Date.now();
+        this.notifications.set(now, notification);
+
+        setTimeout(() => {
+            this.notifications.delete(now);
+        }, NOTIFICATION_TTL);
+    }
+}

src/app/views/dashboard/dashboard.component.html

@@ -1 +1,4 @@
 <p>dashboard works!</p>
+
+<button mat-button (click)="testInfo()">Test Info</button>
+<button mat-button (click)="testError()">Test Error</button>

src/app/views/dashboard/dashboard.component.ts

@@ -1,11 +1,20 @@
 import { Component } from '@angular/core';
+import { MatButton } from '@angular/material/button';
+
+import { NotificationService, NotificationType } from '../../core/notification/notification.service';
 
 @Component({
     selector: 'app-dashboard',
-    imports: [],
+    imports: [MatButton],
     templateUrl: './dashboard.component.html',
     styleUrl: './dashboard.component.scss'
 })
 export class DashboardComponent {
-
+    constructor(private notifications: NotificationService) { }
+    testInfo() {
+        this.notifications.publish('Cake', NotificationType.Information);
     }
+
+    testError() {
+        this.notifications.publish('Cake', NotificationType.Error);
+    }}

src/styles.scss

@@ -1,21 +1,21 @@
 @use '@angular/material' as mat;
 
-html {
-  color-scheme: light dark;
-
-  @include mat.theme((color: mat.$azure-palette,
-      typography: Roboto,
-      density: 0));
-  --mat-sys-primary-overlay: color-mix(in srgb, var(--mat-sys-primary) 10%, transparent);
-}
 
 html,
 body {
   height: 100%;
-}
-
-body {
   margin: 0;
+
   background: var(--mat-sys-surface);
   color: var(--mat-sys-on-surface);
+
+  --mat-sys-primary-overlay: color-mix(in srgb, var(--mat-sys-primary) 10%, transparent);
+
+  color-scheme: light dark;
+  font-family: var(--mat-sys-label-medium-font);
+
+  @include mat.theme((color: mat.$azure-palette,
+      typography: Roboto,
+      density: 0));
+
 }