a.js

// This service acts performs various actions such with Azure AD B2C
// It use an external library MSAL.JS minumim version 1.4. Check package.json
// Modify environment.ts file to update client id, tenant , policy etc. on changes in Azure portal
// First draft by - Dhananjay Kumar in Sprint 0
// Last modified by - Dhananjay Kumar in Sprint 0
// Unit Test - 0
import { Inject, Injectable } from '@angular/core';
declare var Msal: any;
import { environment } from 'src/environments/environment';

@Injectable({
    providedIn:'root'
})
export class AuthenticationService {
    private clientApplication: any; 
    private userRequest = {
        scopes: environment.b2cScopes,
        authority: environment.authority
    };

    // configuration to create UserAgent
    // Modify redirectUri to window.location.origin before pushing and production
    // To cache the token uncomment cache section

    private msalConfig: any = {
        auth: {
            clientId: environment.clientID,
            authority: environment.authority,
            redirectUri: 'http://localhost:4200/',
            navigateToLoginRequestUrl: true,
            validateAuthority: false,
        },
        cache: {
            cacheLocation: "localStorage",
            storeAuthStateInCookie: true, // Set this to "true" to save cache in cookies to address trusted zones limitations in IE
        },
    };

 
        constructor() {}

    public login(): void {

        this.clientApplication = new Msal.UserAgentApplication(this.msalConfig);
        //this.clientApplication.loginRedirect(this.userRequest);
        this.clientApplication.loginPopup(this.userRequest).then(response=>{
             console.log(response);
        })
        .catch(err=>{
            console.log(err)
        })
        console.log(this.clientApplication);
       
    // console.log(this.userRequest);
    //    clientApplication.loginRedirect({ 
    //     scopes: ['openid', 'profile'],
    //     authority: 'https://geek97.b2clogin.com/geek97.onmicrosoft.com/b2c_1_geek97login'
    //    });
       const user = this.clientApplication.getAccount();
        // saving returned user in local storage
       localStorage.setItem('user', JSON.stringify(user));
       
    }

    public logout(): void {
        this.clientApplication.logout();
        localStorage.removeItem('user');
    }

    public isOnline(): boolean {
         return this.clientApplication.getAccount() != null;
       // return true;
    }

    public getUser(): any {
        return this.clientApplication.getAccount();
    }

    //function to get token which will be further passed in the API
    public getAuthenticationToken(): Promise<any> {
        return this.clientApplication.acquireTokenSilent(this.userRequest)
            .then(token => {
                return token;
            }).catch(error => {
                return this.clientApplication.acquireTokenPopup(this.userRequest)
                    .then(token => {
                        return Promise.resolve(token);
                    }).catch(innererror => {
                        console.error('Could not retrieve token from popup.', innererror);
                        return Promise.resolve('');
                    });
            });
    }

    private authCallback(errorDesc: any, token: any, error: any, tokenType: any): void {
        // if (error) {
        //     console.error(`${error} ${errorDesc}`);
        // }
    }

    // function to check whether user is logged in
    isLoggedIn(): boolean {
        const user = JSON.parse(localStorage.getItem('user'));
        console.log(user);
        if (user) {
            return true;
        }
        else {
            return false;
        }
    }
}