Azure Auth

A nativescript wrapper around the native libraries of Microsoft Azure's Active Directory Authentication Libraries ADAL for iOS and ADAl for Android.

Version

Current version: 1.0.5

Installation

tns plugin add nativescript-azure-auth

Usage - Angular

Create a authentication service that uses this library.

import { Injectable } from "@angular/core";
import { AzureAuth, AzureUser } from "nativescript-azure-auth";

const azureAuth: AzureAuth;
const authority: string = "https://login.microsoftonline.com/{TENANT_ID}/oauth2/authorize"
const clientID: string = "{CLIENT_ID}";
const resourceId: string = "{RESOURCE_ID}";
const redirectUri: string = "{REPLY-URL}";

@Injectable()
export class AzureAuthenticationService {
    private azureAuth: AzureAuth;
    constructor() {
        this.azureAuth = new AzureAuth(authority,clientID,resourceId,redirectUri);
    }

    login() {
        this.azureAuth.login()
            .then(accessToken => {
                console.log(`Token: ${accessToken}`);
            })
            .catch(error => {
                console.log(error);
            });
    }

    getToken() {
        this.azureAuth.getToken()
            .then(accessToken => {
                console.log(`Access token : ${accessToken}`);
            })
            .catch(error => {
                console.log(error);
            });
    }

    
    getUser() {
        this.azureAuth.getUser()
            .then((user: AzureUser) => {
                console.log(`Access token : ${JSON.stringify(user)}`);
            })
            .catch(error => {
                console.log(error);
            });
    }


    logout() {
        this.azureAuth.clearCache();
    }

}

The login and logout can be consumed in a component.

import { Component, OnInit, ViewChild, AfterViewInit, ChangeDetectorRef } from "@angular/core";
import { AzureAuthenticationService } from "~azure-authentication.service"

@Component({
  selector: "ns-app",
  templateUrl: "app.component.html"
})
export class AppComponent implements OnInit, AfterViewInit {
    
    constructor(private azureAuthService: AzureAuthenticationService) {}

    login() {
        this.azureAuthService.login();
    }

    logout() {
        this.azureAuthService.logout();
    }
}

The best use-case for getToken would be in an interceptor so you can be sure that the latest access token is attached to your header when you make a http request to a protected Rest API.

import { Component, Inject, Injectable } from "@angular/core";
import { AzureAuthenticationService } from "~azure-authentication.service"
import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor, HttpResponse, HttpHeaders, HttpClient} from "@angular/common/http";
import { Observable, from } from "rxjs";
import "rxjs/add/operator/switchMap";

@Injectable()
export class TokenInterceptor implements HttpInterceptor {
    constructor(private azureAuthService: AzureAuthenticationService) {}

    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        const promise = this.auth.azureAuthService.getToken();
        const observable = from(promise);
        return observable.switchMap((token) => {
            req = req.clone({setHeaders: {
                authorization: `Bearer ${token}`,
                "content-type": "application/json"
            }});
            return next
                .handle(req)
                .do(event => {})
                .catch(err => console.log(err));
        });   
    }
}

API

public login(clearCache?: boolean): Promise<string>

Opens a webview that redirects to login.microsoft.com.

clearCache parameter clears the ADAL tokenCache when set to true. By default clearCache is set to true.

public getToken(): Promise<string>

Silently retrieves a token from Azure Active Directory using the refresh token being stored by the respective native libraries for ADAL. Best used with an interceptor or when creating http request that require th token.

public clearCache(): void

Clears the entire token cache for the clientId set when instantiating this library.

Contributions

Thanks to James Browning for providing help.

License

Apache License Version 2.0, January 2004