WIP: Exercise 4

backend/.env

@@ -0,0 +1 @@
+JWT_SECRET=thecountryroads

backend/.eslintrc.json

@@ -1,6 +1,6 @@
 {
     "env": {
-        "browser": true,
+        "node": true,
         "commonjs": true,
         "es2021": true
     },

backend/package.json

@@ -12,9 +12,14 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "apollo-datasource-rest": "^0.9.5",
+    "apollo-datasource": "^0.7.2",
     "apollo-server": "^2.19.0",
+    "bcrypt": "^5.0.0",
+    "dotenv": "^8.2.0",
     "graphql": "^15.4.0",
+    "graphql-middleware": "^4.0.2",
+    "graphql-shield": "^7.4.2",
+    "jsonwebtoken": "^8.5.1",
     "nodemon": "^2.0.6"
   },
   "devDependencies": {

backend/src/DataSources/posts-data-source.js

@@ -0,0 +1,87 @@
+const {DataSource} = require('apollo-datasource');
+const {UserInputError} = require('apollo-server');
+const crypto = require('crypto');
+
+class Post {
+  constructor (data) {
+    this.id = crypto.randomBytes(16).toString('hex');
+    this.voters = [];
+    this.votes = 0;
+    Object.assign(this, data);
+  }
+}
+
+class PostsDataSource extends DataSource {
+
+  constructor() {
+    super();
+    this.posts = [];
+  }
+
+  async allPosts () {
+    return this.posts;
+  }
+
+  async createPost (data, currUser) {
+
+    if(currUser){
+      const newPost = new Post({...data, author:currUser});
+      this.posts.push(newPost);
+
+      return newPost;
+    }
+
+    return null;
+  }
+
+  async votePost(id, value, currUser) {
+    const post = this.posts.find(e => e.id == id);
+
+    if (post) {
+
+      if(currUser) {
+
+        if(!post.voters.find(voter => voter.id == currUser.id)){
+
+          post.votes+= value;
+          post.voters.push(currUser);
+
+          return post;
+        }
+        else{
+          throw new UserInputError("This user voted on this post already");
+        }
+      }
+    }
+    else{
+      throw new UserInputError("No post with this ID", {invalidArgs: [id]});
+    }
+  }
+
+  async deletePost (id, currUser) {
+
+    const post = this.posts.find(e => e.id == id);
+
+    if (post) {
+
+      if(currUser) {
+
+        if( currUser.id == post.author.id) {
+
+          const deleteIndex = this.posts.indexOf(post);
+          this.posts.splice(deleteIndex,1);
+
+          return post;
+
+        }else {
+          throw new Error("Only authors of a post are allowed to delete their own posts.");
+        }
+      }
+    }
+    else{
+      throw new UserInputError("No post with this ID", {invalidArgs: [id]});
+    }
+
+  }
+} 
+module.exports = {Post, PostsDataSource}