Demo

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!