use camelcase file names from now on...

src/services/userService.ts

@@ -0,0 +1,37 @@
+import bcrypt from 'bcryptjs'
+import UserRepository from '../repositories/userRepository'
+import prisma from '../utilities/prisma'
+import { User } from '@prisma/client'
+
+class UserService {
+  async login(username: string, password: string): Promise<boolean | User> {
+    const user = await UserRepository.getByUsername(username)
+    if (!user) {
+      return false
+    }
+
+    const passwordMatch = await bcrypt.compare(password, user.password)
+    if (!passwordMatch) {
+      return false
+    }
+
+    return user
+  }
+
+  async register(username: string, password: string): Promise<boolean | User> {
+    const user = await UserRepository.getByUsername(username)
+    if (user) {
+      return false
+    }
+
+    const hashedPassword = await bcrypt.hash(password, 10)
+    return prisma.user.create({
+      data: {
+        username,
+        password: hashedPassword
+      }
+    })
+  }
+}
+
+export default UserService