App: https://7jpsan.github.io/spotify-auth-demo/ Repo: https://github.com/7jpsan/spotify-auth-demo/

Spotify Auth - Angular 5

This is a simple library that handles the authentication workflow for an angular 5 application interacting with angular api in a JS only environment, no backend service is required!

Features (v2+):

• An auth library for spotify api v1 and angular 5
• A demo application that exemplifies the use.

Coming next:

• Handle token expiration / invalidity
• Handle session persistence

Difference of this fork

This is a fork/implementation of https://github.com/cyrilletuzi/angular-quickstart-lib which was forked from https://github.com/filipesilva/angular-quickstart-lib go ahead and read their work, it is awesome!

Gotchas

After a lot of time, using the @angular/router and/or RouterModule in a library is quite complicated... I have decided to remove it and expose the mechanisms to the consumer app.

Requirements

Make sure you have at least Node 6.9 and NPM 3.0 installed.

Install

npm install spotify-auth

Usage

• Inherit the http Interceptor spotify-auth.interceptor.ts

  import { Injectable } from  '@angular/core';
  import  'rxjs/add/operator/do'; //Required, yes!
  import { TokenService, SpotifyAuthInterceptor } from  'spotify-auth';
  
  @Injectable()
  export  class  SpotifyAuthInterceptor2  extends  SpotifyAuthInterceptor {
  	
  	doOnError(err:  any):  void {}
  	
  	constructor(tokenSvc:  TokenService) {
  		super(tokenSvc);
  	}
  }
  

• Listen for the authService.authorizedStream and route accordingly. When the login is complete, the stream will emit a true value, which means everything is ok (it hit the authorized url with the right stuff, you should now go to a route you have defined in your router module.

  app.component.ts

  import { Component, OnInit } from  '@angular/core';
  import { AuthService, ScopesBuilder, AuthConfig, TokenService } from  'spotify-auth';
  ...
  constructor(
  	private  infoSvc:  InfoService,
  	private  tokenSvc:  TokenService,
  	private  authService:  AuthService,
  	private  router:  Router
  ) {}
  
  ngOnInit():  void {
  	this.authService.authorizedStream.pipe(filter(x  =>  x)).subscribe(() => {
  		this.router.navigate(['user']);	
  	});
  }
  ...
  

• Create an authorize/login method that uses the module: login.component.ts

  	import { Component, OnInit } from  '@angular/core';
  	import { AuthService, ScopesBuilder, AuthConfig } from 'spotify-auth';
  	...
  	@Component({...});
  	export class SomeClass(){
  		constructor(
  			private  authService:  AuthService,
  			private  tokenSvc:  TokenService,
  			private  router:  Router) { }
  		...
  		public  login():  void {
  			const scopes = new ScopesBuilder()/* .withScopes(ScopesBuilder.LIBRARY) */.build();
  				const ac:  AuthConfig  = {
  					// WebPortal App Id. Your application id from spotify
  					client_id:  "3af5f43840144db2a5ef883b56c5fb7e", 
  					response_type:  "token",
  					// Whitelisted URL, must end with the authozed path for the magic to happen.
  					//i.e:(http://your-domain/yourapp/authorized Or http://localhost:4200/authorized)
  					redirect_uri:  "http://7jpsan.github.io/spotify-auth-demo/authorized", 
  					state:  "",
  					show_dialog:  true,
  					scope:  scopes
  				};
  				this.authService.configure(ac).authorize(); // Magic happens here
  		}
  	}
  

• app.module.ts and/or app-routing.module.ts :

  	import { NgModule, Injectable } from  '@angular/core';
  	...
  	import { SpotifyAuthModule } from  'spotify-auth';
  	import { SpotifyAuthInterceptor2 } from  './spotify-auth.interceptor';
  
      const  routes:  Routes  = [
  
  {
  	path:  '',
  	redirectTo:  'user',
  	pathMatch:  'full'
  },
  {
  	path:  'user',
  	component:  UserComponent
  },
  ...,
  	SpotifyAuthModule.authRoutes()[0] //(Static guarded route with component)
  ];
  NgModule({
  	imports: [
  	BrowserModule,
  	HttpClientModule,
  	HttpModule,
  	SpotifyAuthModule.forRoot(),  //forRoot!!!!
  	RouterModule.forRoot(routes),
  	],
  	declarations: [ AppComponent, UserComponent, LoginComponent, AlbumsComponent ],
  	bootstrap: [ AppComponent ],
  	exports: [],
  	providers: [
  			InfoService,
  			{
  				provide:  HTTP_INTERCEPTORS,
  				//Force interception to use your new shiny headers!
  				useClass:  SpotifyAuthInterceptor2,
  				multi:  true
  			}
  		]
  	})
  export  class  AppModule {}
  

That is it! The code should take care of the rest for you. Enjoy! There is a demo app here https://github.com/7jpsan/spotify-auth-demo. Ignore the one present in this repo. It was split, but never removed. Self TODO :)

If anything goes wrong, please raise an issue!