feat: add register, checkUsername, update swagger

server/src/api/controllers/authController.js

@@ -0,0 +1,51 @@
+import User from '../../models/user.js'
+import { genJWT, hashPassword } from '../../utils/auth.js'
+
+export async function issueToken(req, res) {
+  const { user } = req
+  const token = await genJWT({
+    _id: user.id,
+    username: user.username,
+    email: user.email,
+  })
+  res.json({ token })
+}
+
+export async function checkUsername(req, res) {
+  const { username } = req.query
+  const exists = await User.exists({ username })
+  if (exists) {
+    res.status(409).json({
+      message: `"${username}" already exists`,
+    })
+  } else {
+    res.status(200).json({
+      message: `"${username}" is available`,
+    })
+  }
+}
+
+export async function register(req, res, next) {
+  const { username, password, email } = req.body
+  if (!(username && password && email)) {
+    res.status(400).json({
+      message: 'username, password, and email are required',
+    })
+    return
+  }
+  if (await User.exists({ $or: [{ username }, { email }] })) {
+    res.status(409).json({
+      message: 'username or email already exists',
+    })
+    return
+  }
+  const user = new User({
+    username,
+    email,
+  })
+  user.hashedPassword = await hashPassword(password)
+  await user.save()
+  req.user = user
+  res.status(201)
+  next()
+}