create use cases for auth

src/modules/auth/use-cases/create-user-use-case.ts

@@ -0,0 +1,46 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { UsersRepository } from '../../users/infrastructure/users.repository'
+import { CreateUserInput, UserViewType } from '../../../types/types'
+import { addHours } from 'date-fns'
+import { v4 as uuidv4 } from 'uuid'
+import { UsersService } from '../../users/services/users.service'
+
+export class CreateUserCommand {
+  constructor(public readonly user: { name: string; password: string; email: string }) {}
+}
+
+@CommandHandler(CreateUserCommand)
+export class CreateUserHandler implements ICommandHandler<CreateUserCommand> {
+  constructor(
+    private readonly usersRepository: UsersRepository,
+    private readonly usersService: UsersService
+  ) {}
+
+  async execute(command: CreateUserCommand): Promise<UserViewType | null> {
+    const { name, password, email } = command.user
+    const passwordHash = await this.usersService.generateHash(password)
+    const verificationToken = uuidv4()
+    const newUser: CreateUserInput = {
+      name: name || email.split('@')[0],
+      email: email,
+      password: passwordHash,
+      verificationToken,
+      verificationTokenExpiry: addHours(new Date(), 24),
+      isEmailVerified: false,
+    }
+    const createdUser = await this.usersRepository.createUser(newUser)
+    if (!createdUser) {
+      return null
+    }
+    await this.usersService.sendConfirmationEmail({
+      email: createdUser.email,
+      name: createdUser.name,
+      verificationToken: verificationToken,
+    })
+    return {
+      id: createdUser.id,
+      name: createdUser.name,
+      email: createdUser.email,
+    }
+  }
+}