Upload 4.23

2023-06-10 15:11:13 +03:00
parent 4b88f3958f
commit a9b6ade2f4
18 changed files with 740 additions and 39 deletions
--- a/part4/bloglist/app.js
+++ b/part4/bloglist/app.js
@@ -4,6 +4,8 @@ require('express-async-errors')
 const app = express()
 const cors = require('cors')
 const blogsRouter = require('./controllers/blogs')
+const usersRouter = require('./controllers/users')
+const loginRouter = require('./controllers/login')
 const middleware = require('./utils/middleware')
 const logger = require('./utils/logger')
 const mongoose = require('mongoose')
@@ -23,9 +25,13 @@ mongoose.connect(config.MONGODB_URI)
 app.use(cors())
 app.use(express.static('build'))
 app.use(express.json())
+app.use(middleware.tokenExtractor)
+app.use(middleware.userExtractor)
 app.use(middleware.requestLogger)

 app.use('/api/blogs', blogsRouter)
+app.use('/api/users', usersRouter)
+app.use('/api/login', loginRouter)

 app.use(middleware.unknownEndpoint)
 app.use(middleware.errorHandler)
--- a/part4/bloglist/controllers/blogs.js
+++ b/part4/bloglist/controllers/blogs.js
@@ -2,20 +2,25 @@ const blogsRouter = require('express').Router()
 const Blog = require('../models/blog')

 blogsRouter.get('/', async (request, response) => {
-  const blogs = await Blog.find({})
+  const blogs = await Blog.find({}).populate('user', { username: 1, name: 1 })
  response.json(blogs)
 })

 blogsRouter.post('/', async (request, response) => {
  const body = request.body
-
+  const user = request.user
+  if (!user) return response.status(401).json({ error: 'token invalid' })
  const blog = await (new Blog({
    title: body.title,
    author: body.author,
    url: body.url,
-    likes: body.likes || 0
+    likes: body.likes || 0,
+    user: user._id
  })).save()

+  user.blogs = user.blogs.concat(blog._id)
+  await user.save()
+
  response.status(201).json(blog)

 })
@@ -27,6 +32,12 @@ blogsRouter.get('/:id', async (request, response) => {
 })

 blogsRouter.delete('/:id', async (request, response) => {
+  const user = request.user
+  const blog = await Blog.findById(request.params.id)
+  if (!blog) return response.status(404).end()
+  if (blog.user.toString() !== user._id.toString()) {
+    return response.status(401).json({ error: 'token invalid' })
+  }
  await Blog.findByIdAndRemove(request.params.id)
  response.status(204).end()
 })
--- a/part4/bloglist/controllers/login.js
+++ b/part4/bloglist/controllers/login.js
@@ -0,0 +1,32 @@
+const jwt = require('jsonwebtoken')
+const bcrypt = require('bcrypt')
+const loginRouter = require('express').Router()
+const User = require('../models/user')
+
+loginRouter.post('/', async (request, response) => {
+  const { username, password } = request.body
+
+  const user = await User.findOne({ username })
+  const passwordCorrect = user === null
+    ? false
+    : await bcrypt.compare(password, user.passwordHash)
+
+  if (!(user && passwordCorrect)) {
+    return response.status(401).json({
+      error: 'invalid username or password'
+    })
+  }
+
+  const userForToken = {
+    username: user.username,
+    id: user._id,
+  }
+
+  const token = jwt.sign(userForToken, process.env.SECRET, { expiresIn: 60*60 })
+
+  response
+    .status(200)
+    .send({ token, username: user.username, name: user.name })
+})
+
+module.exports = loginRouter
--- a/part4/bloglist/controllers/users.js
+++ b/part4/bloglist/controllers/users.js
@@ -0,0 +1,30 @@
+const bcrypt = require('bcrypt')
+const usersRouter = require('express').Router()
+const User = require('../models/user')
+
+usersRouter.post('/', async (request, response) => {
+  const { username, name, password } = request.body
+
+  if (!password || password.length < 3) {
+    return response.status(400).json({ error: 'password must be at least 3 characters long' })
+  }
+  const saltRounds = 10
+  const passwordHash = await bcrypt.hash(password, saltRounds)
+
+  const user = new User({
+    username,
+    name,
+    passwordHash,
+  })
+
+  const savedUser = await user.save()
+
+  response.status(201).json(savedUser)
+})
+
+usersRouter.get('/', async (request, response) => {
+  const users = await User.find({}).populate('blogs', { title: 1, author: 1, url: 1, likes: 1 })
+  response.json(users)
+})
+
+module.exports = usersRouter
--- a/part4/bloglist/models/blog.js
+++ b/part4/bloglist/models/blog.js
@@ -16,6 +16,10 @@ const blogSchema = new mongoose.Schema({
  likes: {
    type: Number,
    required: true
+  },
+  user: {
+    type: mongoose.Schema.Types.ObjectId,
+    ref: 'User'
  }
 })

--- a/part4/bloglist/models/user.js
+++ b/part4/bloglist/models/user.js
@@ -0,0 +1,38 @@
+const mongoose = require('mongoose')
+const uniqueValidator = require('mongoose-unique-validator')
+
+const userSchema = new mongoose.Schema({
+  username: {
+    type: String,
+    required: true,
+    unique: true,
+    minLength: 3
+  },
+  name: String,
+  passwordHash: {
+    type: String,
+    required: true,
+  },
+  blogs: [
+    {
+      type: mongoose.Schema.Types.ObjectId,
+      ref: 'Blog'
+    }
+  ],
+})
+
+userSchema.plugin(uniqueValidator)
+
+userSchema.set('toJSON', {
+  transform: (document, returnedObject) => {
+    returnedObject.id = returnedObject._id.toString()
+    delete returnedObject._id
+    delete returnedObject.__v
+    // the passwordHash should not be revealed
+    delete returnedObject.passwordHash
+  }
+})
+
+const User = mongoose.model('User', userSchema)
+
+module.exports = User
--- a/part4/bloglist/package-lock.json
+++ b/part4/bloglist/package-lock.json
@@ -9,12 +9,15 @@
      "version": "1.0.0",
      "license": "ISC",
      "dependencies": {
+        "bcrypt": "^5.1.0",
        "cors": "^2.8.5",
        "cross-env": "^7.0.3",
        "dotenv": "^16.1.1",
        "express": "^4.18.2",
        "express-async-errors": "^3.1.1",
-        "mongoose": "^7.2.2"
+        "jsonwebtoken": "^9.0.0",
+        "mongoose": "^7.2.2",
+        "mongoose-unique-validator": "^4.0.0"
      },
      "devDependencies": {
        "eslint": "^8.41.0",
@@ -1151,6 +1154,69 @@
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      "dev": true
    },
+    "node_modules/@mapbox/node-pre-gyp": {
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+      "resolved": "https://registry.npmjs.org/@mapbox/node-pre-gyp/-/node-pre-gyp-1.0.10.tgz",
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+      "dependencies": {
+        "detect-libc": "^2.0.0",
+        "https-proxy-agent": "^5.0.0",
+        "make-dir": "^3.1.0",
+        "node-fetch": "^2.6.7",
+        "nopt": "^5.0.0",
+        "npmlog": "^5.0.1",
+        "rimraf": "^3.0.2",
+        "semver": "^7.3.5",
+        "tar": "^6.1.11"
+      },
+      "bin": {
+        "node-pre-gyp": "bin/node-pre-gyp"
+      }
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+    "node_modules/@mapbox/node-pre-gyp/node_modules/lru-cache": {
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+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
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+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
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+    "node_modules/@mapbox/node-pre-gyp/node_modules/nopt": {
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+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-5.0.0.tgz",
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+      "dependencies": {
+        "abbrev": "1"
+      },
+      "bin": {
+        "nopt": "bin/nopt.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/semver": {
+      "version": "7.5.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.1.tgz",
+      "integrity": "sha512-Wvss5ivl8TMRZXXESstBA4uR5iXgEN/VC5/sOcuXdVLzcdkz4HWetIoRfG5gb5X+ij/G9rw9YoGn3QoQ8OCSpw==",
+      "dependencies": {
+        "lru-cache": "^6.0.0"
+      },
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/yallist": {
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@@ -1369,6 +1434,17 @@
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+        "debug": "4"
+      },
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@@ -1449,6 +1524,23 @@
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+    },
+    "node_modules/are-we-there-yet": {
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+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-2.0.0.tgz",
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@@ -1685,6 +1788,11 @@
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@@ -1813,6 +1921,14 @@
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+      "bin": {
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-      "dev": true
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@@ -2038,6 +2166,11 @@
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@@ -2055,6 +2188,14 @@
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@@ -2106,6 +2247,14 @@
        "url": "https://github.com/motdotla/dotenv?sponsor=1"
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@@ -2628,11 +2776,37 @@
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@@ -4706,7 +5113,6 @@
      "version": "3.0.2",
      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
      "dependencies": {
        "glob": "^7.1.3"
      },
@@ -4840,6 +5246,11 @@
        "node": ">= 0.8.0"
      }
    },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw=="
+    },
    "node_modules/setprototypeof": {
      "version": "1.2.0",
      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
@@ -4885,8 +5296,7 @@
    "node_modules/signal-exit": {
      "version": "3.0.7",
      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
-      "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
-      "dev": true
+      "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ=="
    },
    "node_modules/simple-update-notifier": {
      "version": "1.1.0",
@@ -5009,6 +5419,14 @@
        "node": ">= 0.8"
      }
    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
    "node_modules/string-length": {
      "version": "4.0.2",
      "resolved": "https://registry.npmjs.org/string-length/-/string-length-4.0.2.tgz",
@@ -5026,7 +5444,6 @@
      "version": "4.2.3",
      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
      "dependencies": {
        "emoji-regex": "^8.0.0",
        "is-fullwidth-code-point": "^3.0.0",
@@ -5040,7 +5457,6 @@
      "version": "6.0.1",
      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
      "dependencies": {
        "ansi-regex": "^5.0.1"
      },
@@ -5181,6 +5597,27 @@
        "url": "https://github.com/sponsors/ljharb"
      }
    },
+    "node_modules/tar": {
+      "version": "6.1.15",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-6.1.15.tgz",
+      "integrity": "sha512-/zKt9UyngnxIT/EAGYuxaMYgOIJiP81ab9ZfkILq4oNLPFX50qyYmu7jRj9qeXoxmJHjGlbH0+cm2uy1WCs10A==",
+      "dependencies": {
+        "chownr": "^2.0.0",
+        "fs-minipass": "^2.0.0",
+        "minipass": "^5.0.0",
+        "minizlib": "^2.1.1",
+        "mkdirp": "^1.0.3",
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/tar/node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    },
    "node_modules/test-exclude": {
      "version": "6.0.0",
      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
@@ -5357,6 +5794,11 @@
        "punycode": "^2.1.0"
      }
    },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
+    },
    "node_modules/utils-merge": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -5436,6 +5878,14 @@
        "node": ">= 8"
      }
    },
+    "node_modules/wide-align": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",
+      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
+      "dependencies": {
+        "string-width": "^1.0.2 || 2 || 3 || 4"
+      }
+    },
    "node_modules/word-wrap": {
      "version": "1.2.3",
      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
@@ -5465,8 +5915,7 @@
    "node_modules/wrappy": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "dev": true
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
    },
    "node_modules/write-file-atomic": {
      "version": "4.0.2",
--- a/part4/bloglist/package.json
+++ b/part4/bloglist/package.json
@@ -11,12 +11,15 @@
  "author": "",
  "license": "ISC",
  "dependencies": {
+    "bcrypt": "^5.1.0",
    "cors": "^2.8.5",
    "cross-env": "^7.0.3",
    "dotenv": "^16.1.1",
    "express": "^4.18.2",
    "express-async-errors": "^3.1.1",
-    "mongoose": "^7.2.2"
+    "jsonwebtoken": "^9.0.0",
+    "mongoose": "^7.2.2",
+    "mongoose-unique-validator": "^4.0.0"
  },
  "devDependencies": {
    "eslint": "^8.41.0",
--- a/part4/bloglist/requests/delete_blog.rest
+++ b/part4/bloglist/requests/delete_blog.rest
@@ -1 +1,2 @@
-DELETE http://localhost:3001/api/blogs/64778b41a8f175e16455b293
+DELETE http://localhost:3001/api/blogs/6484657ae72e7bef647c9905
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFuZHl5eXl5IiwiaWQiOiI2NDg0NWNhNmQwYTQyZWZmYTJkYWI2YjciLCJpYXQiOjE2ODYzOTc5NDAsImV4cCI6MTY4NjQwMTU0MH0.aNbGA9IkA5JyfPyQGzZIP4Y3tETdX_u9OLFqZGB5cfU
--- a/part4/bloglist/requests/get_all.rest
+++ b/part4/bloglist/requests/get_all.rest
@@ -1 +0,0 @@
-GET http://localhost:3001/api/blogs
--- a/part4/bloglist/requests/get_all_blogs.rest
+++ b/part4/bloglist/requests/get_all_blogs.rest
@@ -0,0 +1,2 @@
+GET http://localhost:3001/api/blogs
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFuZHl5eXl5IiwiaWQiOiI2NDg0NWNhNmQwYTQyZWZmYTJkYWI2YjciLCJpYXQiOjE2ODYzOTc5NDAsImV4cCI6MTY4NjQwMTU0MH0.aNbGA9IkA5JyfPyQGzZIP4Y3tETdX_u9OLFqZGB5cfU
--- a/part4/bloglist/requests/get_all_users.rest
+++ b/part4/bloglist/requests/get_all_users.rest
@@ -0,0 +1,2 @@
+GET http://localhost:3001/api/users
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6Im1sdXVra2FpIiwiaWQiOiI2NDdlZmYxNDczODcxN2E3ZTg1OWYzNWIiLCJpYXQiOjE2ODYwNDQ5MDUsImV4cCI6MTY4NjA0ODUwNX0.OVQ7p7Ejpgy6es8hFTf9_lFKriRYdd7YAIMF0iWyasM
--- a/part4/bloglist/requests/login.rest
+++ b/part4/bloglist/requests/login.rest
@@ -0,0 +1,7 @@
+POST http://localhost:3001/api/login 
+content-type: application/json
+
+{
+    "username": "andyyyyy",
+    "password": "123456"
+}
--- a/part4/bloglist/requests/post_blog.rest
+++ b/part4/bloglist/requests/post_blog.rest
@@ -1,7 +1,8 @@
 POST http://localhost:3001/api/blogs 
 content-type: application/json
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFuZHl5eXl5IiwiaWQiOiI2NDg0NWNhNmQwYTQyZWZmYTJkYWI2YjciLCJpYXQiOjE2ODYzOTc5NDAsImV4cCI6MTY4NjQwMTU0MH0.aNbGA9IkA5JyfPyQGzZIP4Y3tETdX_u9OLFqZGB5cfU

 {
-    "title": "Last blog", "author": "Andrew", "url": "www.andrew.eu", "likes": 1000
+    "title": "To be deleted", "author": "Andrew", "url": "www.andrew.eu", "likes": 1000

 }
--- a/part4/bloglist/requests/post_user.rest
+++ b/part4/bloglist/requests/post_user.rest
@@ -0,0 +1,8 @@
+POST http://localhost:3001/api/users 
+content-type: application/json
+
+{
+    "username": "andyyyyy",
+    "name": "Andrew",
+    "password": "123456"
+}
--- a/part4/bloglist/tests/blog_api.test.js
+++ b/part4/bloglist/tests/blog_api.test.js
@@ -5,6 +5,8 @@ const app = require('../app')
 const api = supertest(app)

 const Blog = require('../models/blog')
+const bcrypt = require('bcrypt')
+const User = require('../models/user')
 const helper = require('./test_helper')

 beforeEach(async () => {
@@ -117,6 +119,27 @@ describe('updating blog', () => {
    const contents = blogsAtEnd.map((r) => r.title)
    expect(contents).toContain('Updated blog')
  })
+
+  test('creation fails with proper statuscode and message if username already taken', async () => {
+    const usersAtStart = await helper.usersInDb()
+
+    const newUser = {
+      username: 'root',
+      name: 'Superuser',
+      password: 'salainen',
+    }
+
+    const result = await api
+      .post('/api/users')
+      .send(newUser)
+      .expect(400)
+      .expect('Content-Type', /application\/json/)
+
+    expect(result.body.error).toContain('expected `username` to be unique')
+
+    const usersAtEnd = await helper.usersInDb()
+    expect(usersAtEnd).toEqual(usersAtStart)
+  })
 })

 describe('blog id check', () => {
@@ -126,6 +149,61 @@ describe('blog id check', () => {
  })
 })

+describe('when there is initially one user in db', () => {
+  beforeEach(async () => {
+    await User.deleteMany({})
+
+    const passwordHash = await bcrypt.hash('sekret', 10)
+    const user = new User({ username: 'root', passwordHash })
+
+    await user.save()
+  })
+
+  test('creation succeeds with a fresh username', async () => {
+    const usersAtStart = await helper.usersInDb()
+
+    const newUser = {
+      username: 'mluukkai',
+      name: 'Matti Luukkainen',
+      password: 'salainen',
+    }
+
+    await api
+      .post('/api/users')
+      .send(newUser)
+      .expect(201)
+      .expect('Content-Type', /application\/json/)
+
+    const usersAtEnd = await helper.usersInDb()
+    expect(usersAtEnd).toHaveLength(usersAtStart.length + 1)
+
+    const usernames = usersAtEnd.map(u => u.username)
+    expect(usernames).toContain(newUser.username)
+  })
+})
+
+describe('user validation', () => {
+  test('username must be at least 3 characters long', async () => {
+    const newUser = {
+      username: 'ml',
+      name: 'Matti Luukkainen',
+      password: 'salainen',
+    }
+
+    await api.post('/api/users').send(newUser).expect(400)
+  })
+
+  test('password must be at least 3 characters long', async () => {
+    const newUser = {
+      username: 'mluukkai',
+      name: 'Matti Luukkainen',
+      password: 'sa',
+    }
+
+    await api.post('/api/users').send(newUser).expect(400)
+  })
+})
+
 afterAll(async () => {
  await mongoose.connection.close()
 })
--- a/part4/bloglist/tests/test_helper.js
+++ b/part4/bloglist/tests/test_helper.js
@@ -1,4 +1,5 @@
 const Blog = require('../models/blog')
+const User = require('../models/user')

 const initialBlogs = [
  {
@@ -40,6 +41,11 @@ const blogsInDb = async () => {
  return blogs.map(blog => blog.toJSON())
 }

+const usersInDb = async () => {
+  const users = await User.find({})
+  return users.map(user => user.toJSON())
+}
+
 module.exports = {
-  initialBlogs, nonExistingId, blogsInDb
+  initialBlogs, nonExistingId, blogsInDb, usersInDb
 }
--- a/part4/bloglist/utils/middleware.js
+++ b/part4/bloglist/utils/middleware.js
@@ -1,4 +1,6 @@
 const logger = require('./logger')
+const jwt = require('jsonwebtoken')
+const User = require('../models/user')

 const requestLogger = (request, response, next) => {
  logger.info('Method:', request.method)
@@ -19,13 +21,35 @@ const errorHandler = (error, request, response, next) => {
    return response.status(400).send({ error: 'malformatted id' })
  } else if (error.name === 'ValidationError') {
    return response.status(400).json({ error: error.message })
+  } else if (error.name ===  'JsonWebTokenError') {
+    return response.status(400).json({ error: error.message })
+  } else if (error.name === 'TokenExpiredError') {
+    return response.status(401).json({ error: 'token expired' })
  }

  next(error)
 }

+const tokenExtractor = (request, response, next) => {
+  const authorization = request.get('authorization')
+  if (authorization && authorization.startsWith('Bearer ')) {
+    request.token = authorization.replace('Bearer ', '')
+  }
+  next()
+}
+
+const userExtractor = async (request, response, next) => {
+  if (!request.token) return next()
+  const decodedToken = jwt.verify(request.token, process.env.SECRET)
+  const user = await User.findById(decodedToken.id)
+  request.user = user
+  next()
+}
+
 module.exports = {
  requestLogger,
  unknownEndpoint,
-  errorHandler
+  errorHandler,
+  tokenExtractor,
+  userExtractor
 }