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* Local File Auth Provider
*
* Manages users in a JSON file with bcrypt-hashed passwords.
* The users file lives in the config directory, not the sites directory.
*/
import { readFileSync, writeFileSync, existsSync } from 'fs';
import { join } from 'path';
import { randomUUID } from 'crypto';
import bcrypt from 'bcryptjs';
import type { AuthProvider, AuthUser, AuthResult } from './types.js';
interface StoredUser {
id: string;
email: string;
passwordHash: string;
mustChangePassword: boolean;
createdAt: string;
lastLoginAt: string | null;
}
interface UsersFile {
users: StoredUser[];
meta: { version: number };
}
const BCRYPT_ROUNDS = 10;
export class LocalFileAuthProvider implements AuthProvider {
private filePath: string;
constructor(configDir: string, usersFile: string = 'users.json') {
this.filePath = join(configDir, usersFile);
}
private readUsersFile(): UsersFile {
if (!existsSync(this.filePath)) {
return { users: [], meta: { version: 1 } };
}
const content = readFileSync(this.filePath, 'utf-8');
return JSON.parse(content);
}
private writeUsersFile(data: UsersFile): void {
writeFileSync(this.filePath, JSON.stringify(data, null, 2), 'utf-8');
}
async authenticate(credentials: { email: string; password: string }): Promise<AuthResult> {
const data = this.readUsersFile();
const user = data.users.find(u => u.email === credentials.email);
if (!user) {
return { success: false, error: 'Invalid credentials' };
}
const valid = await bcrypt.compare(credentials.password, user.passwordHash);
if (!valid) {
return { success: false, error: 'Invalid credentials' };
}
// Update last login time
user.lastLoginAt = new Date().toISOString();
this.writeUsersFile(data);
return {
success: true,
user: {
id: user.id,
email: user.email,
mustChangePassword: user.mustChangePassword,
},
};
}
async changePassword(userId: string, oldPassword: string, newPassword: string): Promise<void> {
const data = this.readUsersFile();
const user = data.users.find(u => u.id === userId);
Iif (!user) {
throw new Error('User not found');
}
const valid = await bcrypt.compare(oldPassword, user.passwordHash);
if (!valid) {
throw new Error('Invalid current password');
}
user.passwordHash = await bcrypt.hash(newPassword, BCRYPT_ROUNDS);
user.mustChangePassword = false;
this.writeUsersFile(data);
}
async getUserById(userId: string): Promise<AuthUser | null> {
const data = this.readUsersFile();
const user = data.users.find(u => u.id === userId);
Iif (!user) return null;
return {
id: user.id,
email: user.email,
mustChangePassword: user.mustChangePassword,
};
}
async needsPasswordChange(userId: string): Promise<boolean> {
const user = await this.getUserById(userId);
return user?.mustChangePassword ?? false;
}
async createUser(email: string, password: string, mustChangePassword: boolean = true): Promise<AuthUser> {
const data = this.readUsersFile();
if (data.users.some(u => u.email === email)) {
throw new Error(`User with email '${email}' already exists`);
}
const id = randomUUID();
const passwordHash = await bcrypt.hash(password, BCRYPT_ROUNDS);
const storedUser: StoredUser = {
id,
email,
passwordHash,
mustChangePassword,
createdAt: new Date().toISOString(),
lastLoginAt: null,
};
data.users.push(storedUser);
this.writeUsersFile(data);
return { id, email, mustChangePassword };
}
async removeUser(email: string): Promise<void> {
const data = this.readUsersFile();
const index = data.users.findIndex(u => u.email === email);
if (index === -1) {
throw new Error(`User with email '${email}' not found`);
}
data.users.splice(index, 1);
this.writeUsersFile(data);
}
async listUsers(): Promise<AuthUser[]> {
const data = this.readUsersFile();
return data.users.map(u => ({
id: u.id,
email: u.email,
mustChangePassword: u.mustChangePassword,
}));
}
/**
* Reset a user's password (for CLI admin use).
* Sets mustChangePassword to true.
*/
async resetPassword(email: string, newPassword: string): Promise<void> {
const data = this.readUsersFile();
const user = data.users.find(u => u.email === email);
if (!user) {
throw new Error(`User with email '${email}' not found`);
}
user.passwordHash = await bcrypt.hash(newPassword, BCRYPT_ROUNDS);
user.mustChangePassword = true;
this.writeUsersFile(data);
}
/**
* Check if the users file exists (for first-run detection).
*/
usersFileExists(): boolean {
return existsSync(this.filePath);
}
}
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