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Angular 5 - Component Interaction

app.component.html

<div class="container">
    <div class="row">

        <div class="col-md-12 header">

        </div>

    </div>
    <div class="row">
        <div class="col-md-3 leftNav">

            <ul class="list-group">
                <a class="list-group-item" routerLink="home" routerLinkActive="active">Home</a>
                <a class="list-group-item" routerLink="register" routerLinkActive="active">Register</a>
            </ul>

        </div>
        <div class="col-md-9 mainBar">
            <router-outlet></router-outlet>

        </div>

    </div>

    <div class="row">

        <div class="col-md-12 footerBar">Footer</div>
    </div>

</div>

app.component.ts

import { Component} from ‘@angular/core’;
import { OnInit, OnDestroy } from ‘@angular/core/src/metadata/lifecycle_hooks’;

@Component({
  selector: ‘app-root’,
  templateUrl: ‘./app.component.html’,
  styleUrls: [’./app.component.css’]
})
export class AppComponent implements OnInit, OnDestroy{
  public title:string = ‘app’;
  message:string = "hello";

  constructor(){
    console.log("App Component Constructor called");
  }

  public ngOnInit(){
    console.log("App Component init called");
  }

  public ngOnDestroy(){
    console.log("App Component destroy called");
  }

}

app.module.ts

import { BrowserModule } from ‘@angular/platform-browser’;
import { NgModule } from ‘@angular/core’;
import { RouterModule, Routes} from ‘@angular/router’
import { HttpClientModule } from ‘@angular/common/http’
import { FormsModule} from ‘@angular/forms’

import { AppComponent } from ‘./app.component’;
import { HomeComponent } from ‘./home/home.component’;
import { RegisterComponent } from ‘./register/register.component’;
import { NotFoundComponent } from ‘./not-found/not-found.component’;
import { AppService } from ‘./app.service’;
import { LoginComponent } from ‘./login/login.component’;

const r:Routes = [
  {path:’‘, redirectTo:‘home’, pathMatch:‘full’},
  {path:‘home’,component:HomeComponent},
  {path:‘register’,component:RegisterComponent},
  {path:’**’,component:NotFoundComponent}
];

@NgModule({
  declarations: [
    AppComponent,
    HomeComponent,
    RegisterComponent,
    NotFoundComponent,
    LoginComponent,
  ],
  imports: [
    BrowserModule,
    HttpClientModule,FormsModule,RouterModule.forRoot(r)
  ],
  providers: [AppService],
  bootstrap: [AppComponent]
})
export class AppModule { }

home.component.html

<div class="row">
    <div class="col-md-6">
        Hi {{user.user_full_name}};

    </div>
    <div class="col-md-6">

        <div class="rightNav">
            <app-login [titleName]="‘Registration’" (onReceiveResult)="onGetResultFromChild($event)"></app-login>
        </div>

    </div>
</div>

home.component.ts

import { Component, OnInit } from ‘@angular/core’;
import { OnDestroy, AfterViewInit } from ‘@angular/core/src/metadata/lifecycle_hooks’;
import { NgForm } from ‘@angular/forms’;
import { Title } from ‘@angular/platform-browser’;
import { ActivatedRoute } from ‘@angular/router’;
import { Router } from ‘@angular/router’;
@Component({
  selector: ‘app-home’,
  templateUrl: ‘./home.component.html’,
  styleUrls: [’./home.component.css’]
})
export class HomeComponent implements OnInit , OnDestroy, AfterViewInit{
  public user:any = {};
  public message:string = "Hello this is Home page";
  public formdata:string = "";
  public gender:Array<String> = ["Male","Female","Other"];
  public selectedGender = "Female";
  public choice:any = {movies:true,travel:true};
  constructor(private pageTitle:Title, private router:Router) { 
    this.pageTitle.setTitle("Home");
    console.log("Home constructor called");
  }

  ngOnInit() {
    console.log("Home init called");
  }

  ngOnDestroy(){
    console.log("Home destroy called");
  }

  ngAfterViewInit(){
    console.log("Home after init called");
  }

  public onButtonPressed(){
    this.message = "Hi this message got changed";
  }

  public onDropDownChanged(){

  }

  public onFormSumbit(){
    console.log("Form submitted");
    console.log(this.choice);
  }

  public onGetResultFromChild(payload:any){
    console.log(payload);
    if (payload.result == ‘OK’){
        this.user = payload.data[0];
    }else{
        this.user = payload.message;
    }

    this.router.navigate([‘register’]);

  }

}

login.component.html

<div style="padding: 10px">
    <div class="col-md-12">
        <form (ngSubmit)="onClickLogin()">
            <h4>{{titleName}}!!</h4>
            <div class="form-group">
                <label>Username</label>
                <input type="text" class="form-control" name="username" [(ngModel)]="login.username">
            </div>
            <div class="form-group">
                <label>Password</label>
                <input type="password" class="form-control" name="password" [(ngModel)]="login.password">
            </div>
            <button type="submit" class="btn btn-danger">Login</button>

        </form>

    </div>
</div>

login.component.ts

import { Component, OnInit } from ‘@angular/core’;
import { AppService } from ‘../app.service’;
import { Input } from ‘@angular/core’;
import { Output } from ‘@angular/core’;
import { EventEmitter } from ‘@angular/core’;

@Component({
  selector: ‘app-login’,
  templateUrl: ‘./login.component.html’,
  styleUrls: [’./login.component.css’]
})
export class LoginComponent implements OnInit {

  public login:any = {};
  @Input() titleName:string;
  @Output() onReceiveResult = new EventEmitter<any>();

  constructor(private service:AppService) { }

  ngOnInit() {

  }

  onClickLogin(){
    //console.log(this.login);
    this.service.sendData(‘login’,this.login).subscribe(data=>{
        //console.log(data);
        this.onReceiveResult.emit(data);
    });
  }

}

registration.component.html

<form (ngSubmit)="onRegisterPressed()" #regForm="ngForm">
    <div class="form-group">
        <label>First name</label>
        <input type="text" class="form-control" name="firstname" [(ngModel)]="user.firstname" placeholder="Enter First name" required>

    </div>
    <div class="form-group">
        <label>Last name</label>
        <input type="text" class="form-control" name="lastname" [(ngModel)]="user.lastname" placeholder="Enter Last name" required>
    </div>
    <div class="form-group">
        <label>Username</label>
        <input type="text" class="form-control" name="username" [(ngModel)]="user.username" placeholder="Enter Username" required>
    </div>
    <div class="form-group">
        <label>Password</label>
        <input type="password" class="form-control" name="password" [(ngModel)]="user.password" placeholder="Enter Password" required>
    </div>
    <div style="margin-top: 10px">
        <label>Gender</label>
    </div>

    <label class="radio-inline"><input type="radio" name="gender" [(ngModel)]="user.gender" value="1" style="margin-top:-5px"> Male</label>
    <label class="radio-inline"><input type="radio" name="gender" [(ngModel)]="user.gender" value="2" style="margin-top:-5px"> Female</label>

    <div>

    </div>
    <div style="margin-top: 10px">
        <label>Area of Interest</label>
    </div>
    <div class="checkbox">
        <label><input type="checkbox" name="is_business" [(ngModel)]="isBusiness" style="margin-top:-5px"> Business</label>
    </div>
    <div class="checkbox">
        <label><input type="checkbox" name="is_travel" [(ngModel)]="isTravel" style="margin-top:-5px"> Travel</label>
    </div>
    <div class="checkbox">
        <label><input type="checkbox" name="is_holidays" [(ngModel)]="isHolidays" style="margin-top:-5px"> Holidays</label>
    </div>

    <div>
        <button type="submit" class="btn  btn-success" [disabled]="!regForm.form.valid">Register</button>
    </div>

</form>

registration.component.ts

import { Component, OnInit } from ‘@angular/core’;
import { OnDestroy, AfterViewInit } from ‘@angular/core/src/metadata/lifecycle_hooks’;
import { AppService } from ‘../app.service’;
import { Title } from ‘@angular/platform-browser’;
import { Subscription } from ‘rxjs/Subscription’;

@Component({
  selector: ‘app-register’,
  templateUrl: ‘./register.component.html’,
  styleUrls: [’./register.component.css’]
})
export class RegisterComponent implements OnInit, OnDestroy, AfterViewInit {
  public user:any = {gender:"2"};
  public isBusiness = false;
  public isTravel = false;
  public isHolidays = false;
  private regSub:Subscription;
  constructor(private service:AppService, private pageTitle:Title) { 
    this.pageTitle.setTitle("Register");
    console.log("Register constructor called");
    
  }

  ngOnInit() {
    console.log("Register init called");
  }

  ngOnDestroy(){
    console.log("Register destroy called");
    if (this.regSub){
      this.regSub.unsubscribe();
    }
  }

  ngAfterViewInit(){
    console.log("Register after init called");
  }

  public onRegisterPressed(){
    
    
    this.user.is_business = 2;
    this.user.is_travel = 2;
    this.user.is_holidays = 2;
    if (this.isBusiness){
      this.user.is_business = 1;
    }
    if (this.isHolidays){
      this.user.is_holidays = 1;
    }
    if (this.isTravel){
      this.user.is_travel = 1;
    }

    console.log(this.user);

    this.regSub = this.service.sendData(‘registration’,this.user).subscribe(data =>{
      console.log(data);

      if (data.result == ‘OK’){
        window.alert("Successfully registered");
        this.user = {gender:"2"};
      }else{
        window.alert(data.message);
      }
     
    });
  }

}

not-found.component.html

<p>
    This page does not exists
</p>

not-found.component.ts

import { Component, OnInit } from ‘@angular/core’;

@Component({
  selector: ‘app-not-found’,
  templateUrl: ‘./not-found.component.html’,
  styleUrls: [’./not-found.component.css’]
})
export class NotFoundComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}

app.service.ts

import { Injectable } from ‘@angular/core’;
import { HttpClient, HttpHeaders } from ‘@angular/common/http’;
import { Observable } from ‘rxjs/Observable’;
const URL:string = "http://vasudevkumaran.com/ang/";
@Injectable()
export class AppService {

  constructor(private httpClient:HttpClient) { }

  public sendData(path:string,payload:any):Observable<any>{
    var headerParams:HttpHeaders = new HttpHeaders();
    headerParams.append(‘Content-Type’,‘application/json’);
    return this.httpClient.post(URL+path,payload,{headers:headerParams});
  }

}

index.html

<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title>RegApp</title>
    <base href="/">

    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" type="image/x-icon" href="favicon.ico">
    <link rel="stylesheet" href="assets/css/bootstrap.min.css">
    <link rel="stylesheet" href="assets/mystyle.css">

</head>

<body>
    <app-root></app-root>
    <script src="assets/js/jquery-3.2.1.min.js"></script>
    <script src="assets/js/bootstrap.min.js"></script>
</body>

</html>

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