RxJs and Reactive Patterns Angular Architecture Course ongoing

Author: Your Name

images/loading.gif

@@ -3,6 +3,8 @@
 
 <messages></messages>
 
+<loading></loading>
+
 <div>
 
     <router-outlet></router-outlet>

src/app/app.component.html

@@ -29,6 +29,8 @@ import {SafeUrlPipe} from "./shared/pipes/safe-url.pipe";
 import {LessonsPagerService} from "./services/lessons-pager.service";
 import { MessagesComponent } from './messages/messages.component';
 import {MessagesService} from "./services/messages.service";
+import { LoadingComponent } from './loading/loading.component';
+import {LoadingService} from "./loading/loading.service";
 
 
 @NgModule({
@@ -49,7 +51,8 @@ import {MessagesService} from "./services/messages.service";
         CourseComponent,
         LessonDetailComponent,
         SafeUrlPipe,
-        MessagesComponent
+        MessagesComponent,
+        LoadingComponent
     ],
     imports: [
         BrowserModule,
@@ -63,7 +66,8 @@ import {MessagesService} from "./services/messages.service";
         NewsletterService,
         UserService,
         CoursesHttpService,
-        MessagesService
+        MessagesService,
+        LoadingService
 
     ],
     bootstrap: [AppComponent]

src/app/app.module.ts

@@ -0,0 +1,12 @@
+
+
+.loading-indicator {
+    width: 100%;
+    position: absolute;
+    text-align: center;
+}
+
+.loading-indicator img {
+    width: 75px;
+    margin-top: 100px;
+}

src/app/loading/loading.component.css

@@ -0,0 +1,3 @@
+<div class="loading-indicator" *ngIf="loading$ | async">
+    <img src="/images/loading.gif">
+</div>

src/app/loading/loading.component.html

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { LoadingComponent } from './loading.component';
+
+describe('LoadingComponent', () => {
+  let component: LoadingComponent;
+  let fixture: ComponentFixture<LoadingComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ LoadingComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(LoadingComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/loading/loading.component.spec.ts

@@ -0,0 +1,22 @@
+import { Component, OnInit } from '@angular/core';
+import {LoadingService} from "./loading.service";
+import {Observable} from "rxjs";
+
+@Component({
+  selector: 'loading',
+  templateUrl: './loading.component.html',
+  styleUrls: ['./loading.component.css']
+})
+export class LoadingComponent implements OnInit {
+
+  loading$: Observable<boolean>;
+
+  constructor(private loadingService: LoadingService) {
+
+  }
+
+  ngOnInit() {
+      this.loading$ = this.loadingService.loading$;
+  }
+
+}

src/app/loading/loading.component.ts

@@ -0,0 +1,21 @@
+import {Injectable} from '@angular/core';
+import {BehaviorSubject} from "rxjs";
+
+
+@Injectable()
+export class LoadingService {
+
+    private subject = new BehaviorSubject<boolean>(false);
+
+    loading$ = this.subject.asObservable();
+
+
+    loadingOn() {
+        this.subject.next(true);
+    }
+
+    loadingOff() {
+        this.subject.next(false);
+    }
+
+}