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bloglist_backend/blogs.js

+const blogsRouter = require('express').Router()
+const Blog = require('../models/blog')
+const User = require('../models/user')
+const jwt = require('jsonwebtoken')
+
+//asyncia käyttävät metodit:
+blogsRouter.get('/', async (request, response) => {
+    const blogs = await Blog
+        .find({}).populate('user', { username: 1, name: 1} )
+    response.json(blogs)
+})
+
+const getTokenFrom = request => {
+    const authorization = request.get('authorization')
+    if (authorization && authorization.toLowerCase().startsWith('bearer ')) {
+      return authorization.substring(7)
+    }
+    return null
+  }
+
+//blogin lisäys token-autentikoinnin avulla:
+blogsRouter.post('/', async (request, response) => {
+    const body = request.body
+    //mikäli token on väärä tai sitä ei ole, tulostetaan viesti
+    const token = getTokenFrom(request)
+    const decodedToken = jwt.verify(token, process.env.SECRET)
+    if (!token || !decodedToken.id) {
+        return response.status(401).json({ error: 'token missing or invalid' })
+    }
+    const user = await User.findById(decodedToken.id)
+
+    const blog = new Blog({
+        title: body.title,
+        author: body.author,
+        url: body.url,
+        likes: body.likes,
+        user: user._id
+    })
+    const savedBlog = await blog.save()
+    user.blogs = user.blogs.concat(savedBlog._id)
+    await user.save()
+    response.json(savedBlog.toJSON())
+})
+
+blogsRouter.delete('/:id', async (request, response) => {
+    await Blog.findByIdAndRemove(request.params.id)
+    response.status(204).end()
+})
+
+blogsRouter.put('/:id', async (request, response) => {
+    const body = request.body
+    const likes = {
+        likes: body.likes
+    }
+  
+    const updatedBlog = await Blog.findByIdAndUpdate(request.params.id, likes, { new: body.likes })
+    response.json(updatedBlog)
+})
+
+/*
+//blogin lisäys aiemmissa tehtävissä ennen tokenin määritystä:
+
+blogsRouter.post('/', async (request, response) => {
+    const body = request.body
+    //määritellään jokaisen lisäyksen yhteyteen käyttäjän määrittely
+    const user = await User.findById(body.userId)
+    const blog = new Blog({
+        title: body.title,
+        author: body.author,
+        url: body.url,
+        likes: body.likes,
+        user: user._id
+    })
+    const savedBlog = await blog.save()
+    user.blogs = user.blogs.concat(savedBlog._id)
+    await user.save()
+    response.status(201).json(savedBlog)
+})
+
+//promiseja käyttävät metodit:
+
+blogsRouter.put('/:id', (request, response, next) => {
+    const body = request.body
+    const likes = {
+        likes: body.likes
+    }
+  
+    Blog.findByIdAndUpdate(request.params.id, likes, { new: body.likes })
+      .then(updatedBlog => {
+        response.json(updatedBlog)
+      })
+      .catch(error => next(error))
+})
+
+blogsRouter.get('/', (request, response) => {
+    Blog.find(request.params).then(blogs => {
+        response.json(blogs)
+      })
+  })
+
+blogsRouter.post('/', (request, response, next) => {
+    const body = request.body
+
+    if (!body.title) {
+        return response.status(400).json({ 
+        error: 'title missing' 
+        })
+    }
+    
+    const blog = new Blog({
+        title: body.title,
+        author: body.author,
+        url: body.url,
+        likes: body.likes
+    })
+    blog.save().then(savedBlog => {
+        response.json(savedBlog)
+    })
+    .catch(error => next(error))
+})
+*/
+
+module.exports = blogsRouter
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