preparing new lessons

Author: Your Name

src/app/app.module.ts

@@ -16,6 +16,9 @@ import { CourseDetailComponent } from './course-detail/course-detail.component';
 import {CoursesService} from "./services/courses.service";
 import { CoursesListComponent } from './courses-list/courses-list.component';
 import { CourseDetailHeaderComponent } from './course-detail-header/course-detail-header.component';
+import { NewsletterComponent } from './newsletter/newsletter.component';
+import {NewsletterService} from "./services/newsletter.service";
+import {UserService} from "./services/user.service";
 
 @NgModule({
   declarations: [
@@ -27,7 +30,8 @@ import { CourseDetailHeaderComponent } from './course-detail-header/course-detai
     HomeComponent,
     CourseDetailComponent,
     CoursesListComponent,
-    CourseDetailHeaderComponent
+    CourseDetailHeaderComponent,
+    NewsletterComponent
   ],
   imports: [
     BrowserModule,
@@ -37,7 +41,9 @@ import { CourseDetailHeaderComponent } from './course-detail-header/course-detai
     RouterModule.forRoot(routerConfig),
   ],
   providers: [
-      CoursesService
+      CoursesService,
+      NewsletterService,
+      UserService
   ],
   bootstrap: [AppComponent]
 })

src/app/course-detail-header/course-detail-header.component.html

@@ -4,10 +4,4 @@ <h2>{{course?.description}}</h2>
 <h5>Total lessons: {{lessons?.length}}</h5>
 
 
-<fieldset class="newsletter">
-    <legend>Newsletter</legend>
-    <form>
-        <input type="email" name="email" placeholder="Enter your Email">
-        <input type="button" class="button button-primary" value="Subscribe">
-    </form>
-</fieldset>
+<newsletter></newsletter>

src/app/newsletter/newsletter.component.css

@@ -0,0 +1,12 @@
+<fieldset class="newsletter">
+    <legend>Newsletter</legend>
+
+    <h5>Hello {{(userService.user$ | async)?.firstName }},
+        enter your name below to subscribe:</h5>
+
+    <form>
+        <input type="email" name="email" placeholder="Enter your Email">
+        <input #email type="button" class="button button-primary" value="Subscribe"
+               (click)="subscribe(email.value)">
+    </form>
+</fieldset>

src/app/newsletter/newsletter.component.html

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

src/app/newsletter/newsletter.component.spec.ts

@@ -0,0 +1,21 @@
+import {Component, OnInit} from '@angular/core';
+import {UserService} from "../services/user.service";
+import {NewsletterService} from "../services/newsletter.service";
+
+@Component({
+    selector: 'newsletter',
+    templateUrl: './newsletter.component.html',
+    styleUrls: ['./newsletter.component.css']
+})
+export class NewsletterComponent {
+
+    constructor(private userService: UserService,
+                private newsletterService: NewsletterService) {
+
+    }
+
+    subscribe(email:string) {
+        this.newsletterService.subscribeToNewsletter(email);
+    }
+
+}

src/app/newsletter/newsletter.component.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { NewsletterService } from './newsletter.service';
+
+describe('NewsletterService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [NewsletterService]
+    });
+  });
+
+  it('should ...', inject([NewsletterService], (service: NewsletterService) => {
+    expect(service).toBeTruthy();
+  }));
+});

src/app/services/newsletter.service.spec.ts

@@ -0,0 +1,15 @@
+import { Injectable } from '@angular/core';
+import {Http} from "@angular/http";
+
+@Injectable()
+export class NewsletterService {
+
+
+  constructor(private http:Http) { }
+
+    subscribeToNewsletter(email: string) {
+
+    }
+
+
+}

src/app/services/newsletter.service.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { UserService } from './user.service';
+
+describe('UserService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [UserService]
+    });
+  });
+
+  it('should ...', inject([UserService], (service: UserService) => {
+    expect(service).toBeTruthy();
+  }));
+});

src/app/services/user.service.spec.ts

@@ -0,0 +1,35 @@
+import {Injectable, OnInit} from '@angular/core';
+import {Observable, BehaviorSubject} from "rxjs";
+import {User} from "../shared/model/user";
+
+
+export const ANONYMOUS_USER : User = {
+    firstName: ' Anonymous',
+    lastName: ''
+}
+
+
+@Injectable()
+export class UserService implements OnInit {
+
+   private subject =  new BehaviorSubject<User>(ANONYMOUS_USER);
+
+   user$: Observable<User> = this.subject.asObservable();
+
+
+  constructor() {
+
+
+  }
+
+
+  ngOnInit() {
+
+
+
+
+  }
+
+
+
+}