111 lines
3.6 KiB
TypeScript
111 lines
3.6 KiB
TypeScript
import { EmailAddress } from '../../domain/value-objects/EmailAddress';
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import { UserId } from '../../domain/value-objects/UserId';
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import { User } from '../../domain/entities/User';
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import { IAuthRepository } from '../../domain/repositories/IAuthRepository';
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import { IPasswordHashingService } from '../../domain/services/PasswordHashingService';
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import { PasswordHash } from '../../domain/value-objects/PasswordHash';
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import { Result } from '@core/shared/application/Result';
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import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
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import type { Logger, UseCase } from '@core/shared/application';
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export type SignupInput = {
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email: string;
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password: string;
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displayName: string;
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};
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export type SignupResult = {
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user: User;
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};
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export type SignupErrorCode = 'USER_ALREADY_EXISTS' | 'WEAK_PASSWORD' | 'INVALID_DISPLAY_NAME' | 'REPOSITORY_ERROR';
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export type SignupApplicationError = ApplicationErrorCode<SignupErrorCode, { message: string }>;
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/**
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* Application Use Case: SignupUseCase
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*
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* Handles user registration.
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*/
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export class SignupUseCase implements UseCase<SignupInput, SignupResult, SignupErrorCode> {
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constructor(
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private readonly authRepo: IAuthRepository,
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private readonly passwordService: IPasswordHashingService,
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private readonly logger: Logger,
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) {}
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async execute(input: SignupInput): Promise<Result<SignupResult, SignupApplicationError>> {
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try {
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// Validate email format
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const emailVO = EmailAddress.create(input.email);
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// Validate password strength
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if (!this.isPasswordStrong(input.password)) {
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return Result.err({
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code: 'WEAK_PASSWORD',
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details: { message: 'Password must be at least 8 characters and contain uppercase, lowercase, and number' },
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});
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}
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// Check if user exists
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const existingUser = await this.authRepo.findByEmail(emailVO);
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if (existingUser) {
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return Result.err({
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code: 'USER_ALREADY_EXISTS',
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details: { message: 'User already exists' },
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});
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}
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// Hash password
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const hashedPassword = await this.passwordService.hash(input.password);
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const passwordHash = PasswordHash.fromHash(hashedPassword);
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// Create user (displayName validation happens in User entity constructor)
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const userId = UserId.create();
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const user = User.create({
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id: userId,
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displayName: input.displayName,
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email: emailVO.value,
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passwordHash,
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});
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await this.authRepo.save(user);
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return Result.ok({ user });
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} catch (error) {
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// Handle specific validation errors from User entity
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if (error instanceof Error) {
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if (error.message.includes('Name must be at least') ||
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error.message.includes('Name can only contain') ||
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error.message.includes('Please use your real name')) {
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return Result.err({
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code: 'INVALID_DISPLAY_NAME',
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details: { message: error.message },
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});
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}
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}
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const message =
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error instanceof Error && error.message
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? error.message
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: 'Failed to execute SignupUseCase';
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this.logger.error('SignupUseCase.execute failed', error instanceof Error ? error : undefined, {
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input,
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});
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return Result.err({
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code: 'REPOSITORY_ERROR',
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details: { message },
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});
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}
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}
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private isPasswordStrong(password: string): boolean {
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if (password.length < 8) return false;
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if (!/[a-z]/.test(password)) return false;
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if (!/[A-Z]/.test(password)) return false;
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if (!/\d/.test(password)) return false;
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return true;
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}
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} |