resolvers-with-auth.js

const posts = require("./posts");
const { authenticate } = require("./authService");

module.exports = {
  Query: {
    posts: (_parent, _args, context, _info) => {
      return posts.filter(post => {
        const isAuthor = post.authorId === context.user.id;
        const isAdmin = context.user.roles.includes("admin");
        return isAuthor || isAdmin;
      });
    }
  },
  Mutation: {
    login: (_parent, args, _context, _info) => {
      const { email, password } = args;
      const token = authenticate(email, password);
      return { token };
    }
  }
};