check-auth createpost deletepost

graphql/resolvers/index.js

@@ -6,6 +6,7 @@ module.exports = {
     ...postsResolvers.Query
   },
   Mutation: {
-    ...usersResolvers.Mutation
+    ...usersResolvers.Mutation,
+    ...postsResolvers.Mutation
   }
 };

graphql/resolvers/posts.js

 const Post = require("../../models/Post");
+const checkAuth = require("../../util/check-auth");
+const { AuthenticationError } = require("apollo-server");
 
 module.exports = {
   Query: {
     async getPosts() {
       try {
-        const posts = await Post.find();
+        const posts = await Post.find().sort({ createdAt: -1 });
         return posts;
       } catch (err) {
         throw new Error(err);
       }
+    },
+    async getPost(_, { postId }) {
+      try {
+        const post = await Post.findById(postId);
+
+        if (post) {
+          return post;
+        } else {
+          throw new Error("Post not found");
+        }
+      } catch (err) {
+        throw new Error(err);
+      }
+    }
+  },
+  Mutation: {
+    async createPost(_, { body }, context) {
+      const user = checkAuth(context);
+
+      const newPost = new Post({
+        body,
+        username: user.username,
+        createdAt: new Date().toISOString(),
+        user: user.id
+      });
+
+      const post = await newPost.save();
+
+      return post;
+    },
+    async deletePost(_, { postId }, context) {
+      const user = checkAuth(context);
+
+      try {
+        const post = await Post.findById(postId);
+        if (user.username === post.username) {
+          await post.delete();
+          return "Post deleted successfully";
+        } else {
+          throw new AuthenticationError("Action not allowed");
+        }
+      } catch (err) {
+        throw new Error(err);
+      }
     }
   }
 };

graphql/typeDefs.js

@@ -10,6 +10,7 @@ module.exports = gql`
 
   type Query {
     getPosts: [Post]
+    getPost(postId: ID!): Post
   }
 
   type User {
@@ -30,5 +31,7 @@ module.exports = gql`
   type Mutation {
     register(registerInput: RegisterInput): User!
     login(username: String!, password: String!): User!
+    createPost(body: String!): Post!
+    deletePost(postId: ID!): String!
   }
 `;

index.js

@@ -9,7 +9,8 @@ const resolvers = require("./graphql/resolvers");
 
 const server = new ApolloServer({
   typeDefs,
-  resolvers
+  resolvers,
+  context: ({ req }) => ({ req })
 });
 
 mongoose

util/check-auth.js

+const jwt = require("jsonwebtoken");
+const { SECRET_KEY } = require("../config");
+const { AuthenticationError } = require("apollo-server");
+
+module.exports = context => {
+  const authHeader = context.req.headers.authorization;
+
+  if (authHeader) {
+    const token = authHeader.split("Bearer ")[1];
+
+    if (token) {
+      try {
+        const user = jwt.verify(token, SECRET_KEY);
+        return user;
+      } catch (error) {
+        throw new AuthenticationError("Invalid/Expired token");
+      }
+    }
+    throw new Error("Authentication token must be 'Bearer [token]");
+  }
+  throw new Error("Authorization header must be provided");
+};