graphQL with apollo

db.mjs

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+let games = [
+    {id: '1', title: 'Zelda, Tears of the Kingdom', platform: ['Switch']},
+    {id: '2', title: 'Final Fantasy 7 Remake', platform: ['PS5', 'Xbox']},
+    {id: '3', title: 'Elden Ring', platform: ['PS5', 'Xbox', 'PC']},
+    {id: '4', title: 'Mario Kart', platform: ['Switch']},
+    {id: '5', title: 'Pokemon Scarlet', platform: ['PS5', 'Xbox', 'PC']},
+]
+
+let authors = [
+    {id: '1', name: 'mario', verified: true},
+    {id: '2', name: 'yoshi', verified: false},
+    {id: '3', name: 'peach', verified: true},
+]
+
+let reviews = [
+    {id: '1', rating: 9, content: 'lorem ipsum', author_id: '1', game_id: '2'},
+    {id: '2', rating: 10, content: 'lorem ipsum', author_id: '2', game_id: '1'},
+    {id: '3', rating: 7, content: 'lorem ipsum', author_id: '3', game_id: '3'},
+    {id: '4', rating: 5, content: 'lorem ipsum', author_id: '2', game_id: '4'},
+    {id: '5', rating: 8, content: 'lorem ipsum', author_id: '2', game_id: '5'},
+    {id: '6', rating: 7, content: 'lorem ipsum', author_id: '1', game_id: '2'},
+    {id: '7', rating: 10, content: 'lorem ipsum', author_id: '3', game_id: '1'},
+]
+
+export default { games, authors, reviews }

schema.mjs

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+import { ApolloServer,gql } from "apollo-server";
+
+export const typeDefs  = `#graphql
+    type Game{
+    id:ID!
+    title:String!
+    platform:[String!]!
+    reviews:[Review!]    
+    }
+    type Review{
+    id:ID!
+    rating:Int!
+    content:String!
+    game:Game!
+    author:Author!    
+    }
+    type Author{
+    id:ID!
+    name:String!
+    verified:Boolean!
+    reviews:[Review!]    
+    }
+    type Query{
+        reviews: [Review]
+        games: [Game]
+        review(id:ID!):Review
+        game(id:ID!):Game
+        author(id:ID!):Author
+        authors: [Author]
+    }
+`;

server.mjs

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+import { ApolloServer } from "@apollo/server";
+import  { startStandaloneServer } from "@apollo/server/standalone";
+
+import { typeDefs}  from "./schema.mjs";
+import db from "./db.mjs";
+
+const resolvers= {
+    Query: {
+        games(){
+            return db.games
+        },
+        reviews() {
+            return db.reviews
+        },
+        authors() {
+            return db.authors
+        },
+        review(_,args){
+            return db.reviews.find((review)=>review.id===args.id);
+        },
+        game(_,args){
+            return db.games.find((game)=>game.id===args.id);
+        },
+        author(_,args){
+            return db.authors.find(author=>author.id===args.id);
+        }
+    },
+    Game:{
+        reviews(parent){
+            return db.reviews.filter((r)=>r.game_id===parent.id);
+        }
+    },
+    Author:{
+        reviews(parent){
+            return db.reviews.filter((r)=>r.author_id===parent.id);
+        }
+    },
+    Review:{
+        author(parent) {
+            return db.authors.find((a)=>a.id===parent.author_id);
+        },
+        game(parent){
+            return db.games.find((g)=>g.id===parent.game_id)
+        }
+    }
+
+}
+const server = new ApolloServer({
+    typeDefs,
+    resolvers
+})
+
+const { url } = await startStandaloneServer(server,(req, res) => {
+    listen = { port:4000 };
+})
+
+console.log(`server listening on port ${url}`);