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import { useState, useEffect } from "react";
import { BehaviorSubject, Observable } from "rxjs";
import { UiLogicError } from "@/common";
import { HttpNetworkError, setHttpToken } from "@/http/common";
import {
getHttpTokenClient,
HttpCreateTokenBadCredentialError,
} from "@/http/token";
import { getHttpUserClient, HttpUser, UserPermission } from "@/http/user";
import { pushAlert } from "./alert";
interface IAuthUser extends HttpUser {
token: string;
}
export class AuthUser implements IAuthUser {
constructor(user: HttpUser, public token: string) {
this.uniqueId = user.uniqueId;
this.username = user.username;
this.permissions = user.permissions;
this.nickname = user.nickname;
}
uniqueId: string;
username: string;
permissions: UserPermission[];
nickname: string;
get hasAdministrationPermission(): boolean {
return this.permissions.length !== 0;
}
get hasAllTimelineAdministrationPermission(): boolean {
return this.permissions.includes("AllTimelineManagement");
}
get hasHighlightTimelineAdministrationPermission(): boolean {
return this.permissions.includes("HighlightTimelineManagement");
}
}
export interface LoginCredentials {
username: string;
password: string;
}
export class BadCredentialError {
message = "login.badCredential";
}
const USER_STORAGE_KEY = "currentuser";
export class UserService {
constructor() {
this.userSubject.subscribe((u) => {
setHttpToken(u?.token ?? null);
});
}
private userSubject = new BehaviorSubject<AuthUser | null | undefined>(
undefined
);
get user$(): Observable<AuthUser | null | undefined> {
return this.userSubject;
}
get currentUser(): AuthUser | null | undefined {
return this.userSubject.value;
}
async checkLoginState(): Promise<AuthUser | null> {
if (this.currentUser !== undefined) {
console.warn("Already checked user. Can't check twice.");
}
const savedUserString = localStorage.getItem(USER_STORAGE_KEY);
const savedAuthUserData =
savedUserString == null
? null
: (JSON.parse(savedUserString) as IAuthUser);
const savedUser =
savedAuthUserData == null
? null
: new AuthUser(savedAuthUserData, savedAuthUserData.token);
if (savedUser == null) {
this.userSubject.next(null);
return null;
}
this.userSubject.next(savedUser);
const savedToken = savedUser.token;
try {
const res = await getHttpTokenClient().verify({ token: savedToken });
const user = new AuthUser(res.user, savedToken);
localStorage.setItem(USER_STORAGE_KEY, JSON.stringify(user));
this.userSubject.next(user);
pushAlert({
type: "success",
message: "user.welcomeBack",
});
return user;
} catch (error) {
if (error instanceof HttpNetworkError) {
pushAlert({
type: "danger",
message: "user.verifyTokenFailedNetwork",
});
return savedUser;
} else {
localStorage.removeItem(USER_STORAGE_KEY);
this.userSubject.next(null);
pushAlert({
type: "danger",
message: "user.verifyTokenFailed",
});
return null;
}
}
}
async login(
credentials: LoginCredentials,
rememberMe: boolean
): Promise<void> {
if (this.currentUser) {
throw new UiLogicError("Already login.");
}
try {
const res = await getHttpTokenClient().create({
...credentials,
expire: 30,
});
const user = new AuthUser(res.user, res.token);
if (rememberMe) {
localStorage.setItem(USER_STORAGE_KEY, JSON.stringify(user));
}
this.userSubject.next(user);
} catch (e) {
if (e instanceof HttpCreateTokenBadCredentialError) {
throw new BadCredentialError();
} else {
throw e;
}
}
}
logout(): Promise<void> {
if (this.currentUser === undefined) {
throw new UiLogicError("Please check user first.");
}
if (this.currentUser === null) {
throw new UiLogicError("No login.");
}
localStorage.removeItem(USER_STORAGE_KEY);
this.userSubject.next(null);
return Promise.resolve();
}
changePassword(oldPassword: string, newPassword: string): Promise<void> {
if (this.currentUser == undefined) {
throw new UiLogicError("Not login or checked now, can't log out.");
}
return getHttpUserClient()
.changePassword({
oldPassword,
newPassword,
})
.then(() => this.logout());
}
}
export const userService = new UserService();
export function useRawUser(): AuthUser | null | undefined {
const [user, setUser] = useState<AuthUser | null | undefined>(
userService.currentUser
);
useEffect(() => {
const subscription = userService.user$.subscribe((u) => setUser(u));
return () => {
subscription.unsubscribe();
};
});
return user;
}
export function useUser(): AuthUser | null {
const [user, setUser] = useState<AuthUser | null>(() => {
const initUser = userService.currentUser;
if (initUser === undefined) {
throw new UiLogicError(
"This is a logic error in user module. Current user can't be undefined in useUser."
);
}
return initUser;
});
useEffect(() => {
const sub = userService.user$.subscribe((u) => {
if (u === undefined) {
throw new UiLogicError(
"This is a logic error in user module. User emitted can't be undefined later."
);
}
setUser(u);
});
return () => {
sub.unsubscribe();
};
});
return user;
}
export function useUserLoggedIn(): AuthUser {
const user = useUser();
if (user == null) {
throw new UiLogicError("You assert user has logged in but actually not.");
}
return user;
}
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