[1f4846d] | 1 | import { Injectable, OnDestroy } from '@angular/core';
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| 2 | import { Router } from '@angular/router';
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| 3 | import { HttpClient } from '@angular/common/http';
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| 4 | import { BehaviorSubject, Observable, of, Subscription } from 'rxjs';
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| 5 | import { map, tap, delay, finalize } from 'rxjs/operators';
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| 6 | import { IPharmacyHead } from '../interfaces';
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| 7 | import { environment } from '../../../environments/environment';
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| 8 |
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| 9 |
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| 10 | interface LoginResult {
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| 11 | username: string;
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| 12 | role: string;
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[d23bf72] | 13 | originalUserName?: string;
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[1f4846d] | 14 | accessToken: string;
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| 15 | refreshToken: string;
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[d23bf72] | 16 | head?: IPharmacyHead;
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[1f4846d] | 17 | }
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| 18 |
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| 19 | @Injectable({
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| 20 | providedIn: 'root',
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| 21 | })
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| 22 | export class AuthService implements OnDestroy {
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| 23 | private readonly apiUrl = `${environment.baseApiUrl}api/pharmacyhead`;
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| 24 | private timer: Subscription;
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| 25 | private _user = new BehaviorSubject<IPharmacyHead>(null);
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| 26 | user$: Observable<IPharmacyHead> = this._user.asObservable();
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| 27 |
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| 28 | private storageEventListener(event: StorageEvent) {
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| 29 | if (event.storageArea === localStorage) {
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| 30 | if (event.key === 'logout-event') {
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| 31 | this.stopTokenTimer();
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| 32 | this._user.next(null);
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| 33 | }
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| 34 | if (event.key === 'login-event') {
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| 35 | this.stopTokenTimer();
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| 36 | this.http.get<LoginResult>(`${this.apiUrl}/user`).subscribe((x) => {
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| 37 | this._user.next({
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[ad60966] | 38 | Email: x.username,
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[1f4846d] | 39 | Passwd: x.head.Passwd,
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[ad60966] | 40 | Role: x.role,
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| 41 | originalUserName: x.originalUserName,
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[d23bf72] | 42 | Name: x.head.Name,
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| 43 | PharmacyMedicines: x.head.PharmacyMedicines,
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| 44 | Pharmacy: x.head.Pharmacy
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[1f4846d] | 45 | });
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| 46 | });
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| 47 | }
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| 48 | }
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| 49 | }
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| 50 |
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| 51 | constructor(private router: Router, private http: HttpClient) {
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| 52 | window.addEventListener('storage', this.storageEventListener.bind(this));
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| 53 | console.log(this.apiUrl);
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| 54 | }
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| 55 |
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| 56 | ngOnDestroy(): void {
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| 57 | window.removeEventListener('storage', this.storageEventListener.bind(this));
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| 58 | }
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| 59 |
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| 60 | login(username: string, password: string) {
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| 61 | return this.http
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| 62 | .post<LoginResult>(`${this.apiUrl}/login`, { username, password })
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| 63 | .pipe(
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| 64 | map((x) => {
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| 65 | this._user.next({
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[ad60966] | 66 | Email: x.username,
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[1f4846d] | 67 | Passwd: x.head.Passwd,
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[ad60966] | 68 | Role: x.role,
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| 69 | originalUserName: x.originalUserName,
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[d23bf72] | 70 | Name: x.head.Name,
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| 71 | PharmacyMedicines: x.head.PharmacyMedicines,
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| 72 | Pharmacy: x.head.Pharmacy
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[1f4846d] | 73 | });
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| 74 | this.setLocalStorage(x);
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| 75 | this.startTokenTimer();
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| 76 | return x;
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| 77 | })
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| 78 | );
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| 79 | }
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| 80 |
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| 81 | logout() {
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| 82 | this.http
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| 83 | .post<unknown>(`${this.apiUrl}/logout`, {})
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| 84 | .pipe(
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| 85 | finalize(() => {
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| 86 | this.clearLocalStorage();
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| 87 | this._user.next(null);
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| 88 | this.stopTokenTimer();
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| 89 | this.router.navigate(['login']);
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| 90 | })
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| 91 | )
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| 92 | .subscribe();
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| 93 | }
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| 94 |
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| 95 | refreshToken() {
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| 96 | const refreshToken = localStorage.getItem('refresh_token');
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| 97 | if (!refreshToken) {
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| 98 | this.clearLocalStorage();
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| 99 | return of(null);
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| 100 | }
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| 101 |
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| 102 | return this.http
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| 103 | .post<LoginResult>(`${this.apiUrl}/refresh-token`, { refreshToken })
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| 104 | .pipe(
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| 105 | map((x) => {
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| 106 | this._user.next({
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[ad60966] | 107 | Email: x.username,
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[1f4846d] | 108 | Passwd: x.head.Passwd,
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[ad60966] | 109 | Role: x.role,
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| 110 | originalUserName: x.originalUserName,
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[d23bf72] | 111 | Name: x.head.Name,
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| 112 | PharmacyMedicines: x.head.PharmacyMedicines,
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| 113 | Pharmacy: x.head.Pharmacy
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[1f4846d] | 114 | });
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| 115 | this.setLocalStorage(x);
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| 116 | this.startTokenTimer();
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| 117 | return x;
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| 118 | })
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| 119 | );
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| 120 | }
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| 121 |
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| 122 | setLocalStorage(x: LoginResult) {
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| 123 | localStorage.setItem('access_token', x.accessToken);
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| 124 | localStorage.setItem('refresh_token', x.refreshToken);
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| 125 | localStorage.setItem('login-event', 'login' + Math.random());
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| 126 | }
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| 127 |
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| 128 | clearLocalStorage() {
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| 129 | localStorage.removeItem('access_token');
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| 130 | localStorage.removeItem('refresh_token');
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| 131 | localStorage.setItem('logout-event', 'logout' + Math.random());
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| 132 | }
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| 133 |
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| 134 | getUser() {
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| 135 | return this.user$;
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| 136 | }
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| 137 |
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| 138 | private getTokenRemainingTime() {
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| 139 | const accessToken = localStorage.getItem('access_token');
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| 140 | if (!accessToken) {
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| 141 | return 0;
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| 142 | }
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| 143 | const jwtToken = JSON.parse(atob(accessToken.split('.')[1]));
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| 144 | const expires = new Date(jwtToken.exp * 1000);
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| 145 | return expires.getTime() - Date.now();
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| 146 | }
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| 147 |
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| 148 | private startTokenTimer() {
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| 149 | const timeout = this.getTokenRemainingTime();
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| 150 | this.timer = of(true)
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| 151 | .pipe(
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| 152 | delay(timeout),
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| 153 | tap(() => this.refreshToken().subscribe())
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| 154 | )
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| 155 | .subscribe();
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| 156 | }
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| 157 |
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| 158 | private stopTokenTimer() {
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| 159 | this.timer?.unsubscribe();
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| 160 | }
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| 161 | } |
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