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import axios, { AxiosError } from 'axios';
import { useState, useEffect } from 'react';
import { BehaviorSubject, Observable } from 'rxjs';
import { apiBaseUrl } from '../config';
import { pushAlert } from '../common/alert-service';
import { i18nPromise } from '../i18n';
export interface UserAuthInfo {
username: string;
administrator: boolean;
}
export interface User {
username: string;
administrator: boolean;
nickname: string;
_links: {
avatar: string;
timeline: string;
};
}
export interface UserWithToken extends User {
token: string;
}
interface CreateTokenRequest {
username: string;
password: string;
}
interface CreateTokenResponse {
token: string;
user: User;
}
interface VerifyTokenRequest {
token: string;
}
interface VerifyTokenResponse {
user: User;
}
export type LoginCredentials = CreateTokenRequest;
const userSubject = new BehaviorSubject<UserWithToken | null | undefined>(
undefined
);
export const user$: Observable<UserWithToken | null | undefined> = userSubject;
export function getCurrentUser(): UserWithToken | null | undefined {
return userSubject.value;
}
const kCreateTokenUrl = '/token/create';
const kVerifyTokenUrl = '/token/verify';
const createTokenUrl = apiBaseUrl + kCreateTokenUrl;
const verifyTokenUrl = apiBaseUrl + kVerifyTokenUrl;
function verifyToken(token: string): Promise<User> {
return axios
.post<VerifyTokenResponse>(verifyTokenUrl, {
token: token
} as VerifyTokenRequest)
.then(res => res.data.user);
}
const TOKEN_STORAGE_KEY = 'token';
export function checkUserLoginState(): Promise<UserWithToken | null> {
if (getCurrentUser() !== undefined)
throw new Error("Already checked user. Can't check twice.");
const savedToken = window.localStorage.getItem(TOKEN_STORAGE_KEY);
if (savedToken) {
return verifyToken(savedToken)
.then(
u => {
const user: UserWithToken = {
...u,
token: savedToken
};
i18nPromise.then(t => {
pushAlert({
type: 'success',
message: t('user.welcomeBack')
});
});
return user;
},
(e: AxiosError) => {
if (e.response != null) {
window.localStorage.removeItem(TOKEN_STORAGE_KEY);
i18nPromise.then(t => {
pushAlert({
type: 'danger',
message: t('user.verifyTokenFailed')
});
});
} else {
i18nPromise.then(t => {
pushAlert({
type: 'danger',
message: t('user.verifyTokenFailedNetwork')
});
});
}
return null;
}
)
.then(u => {
userSubject.next(u);
return u;
});
}
userSubject.next(null);
return Promise.resolve(null);
}
export class BadCredentialError {
constructor(public innerError: Error) {}
message = 'login.badCredential';
}
export function userLogin(
credentials: LoginCredentials,
rememberMe: boolean
): Promise<UserWithToken> {
if (getCurrentUser()) {
throw new Error('Already login.');
}
return axios
.post<CreateTokenResponse>(createTokenUrl, { ...credentials, expire: 30 })
.catch(e => {
const error = e as AxiosError;
if (error.response?.data?.code === 11010101) {
throw new BadCredentialError(e);
}
throw e;
})
.then(res => {
const body = res.data;
const token = body.token;
if (rememberMe) {
window.localStorage.setItem(TOKEN_STORAGE_KEY, token);
}
const user = {
...body.user,
token
};
userSubject.next(user);
return user;
});
}
export function userLogout(): void {
if (getCurrentUser() === undefined) {
throw new Error('Please check user first.');
}
if (getCurrentUser() === null) {
throw new Error('No login.');
}
window.localStorage.removeItem(TOKEN_STORAGE_KEY);
userSubject.next(null);
}
export function useOptionalUser(): UserWithToken | null | undefined {
const [user, setUser] = useState<UserWithToken | null | undefined>(
userSubject.value
);
useEffect(() => {
const sub = user$.subscribe(u => setUser(u));
return () => {
sub.unsubscribe();
};
});
return user;
}
export function useUser(): UserWithToken | null {
const [user, setUser] = useState<UserWithToken | null>(() => {
const initUser = userSubject.value;
if (initUser === undefined) {
throw new Error(
"This is a logic error in user module. Current user can't be undefined in useUser."
);
}
return initUser;
});
useEffect(() => {
const sub = user$.subscribe(u => {
if (u === undefined) {
throw new Error(
"This is a logic error in user module. User emitted can't be undefined later."
);
}
setUser(u);
});
return () => {
sub.unsubscribe();
};
});
return user;
}
export function fetchUser(username: string): Promise<User> {
return axios
.get<User>(`${apiBaseUrl}/users/${username}`)
.then(res => res.data);
}
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