JWT addition started

Author: anijitsao

package-lock.json

@@ -13,6 +13,7 @@
   "dependencies": {
     "apollo-server-lambda": "^3.10.0",
     "graphql": "^16.5.0",
+    "jsonwebtoken": "^8.5.1",
     "mongodb": "^4.8.0"
   },
   "devDependencies": {

package.json

@@ -0,0 +1,44 @@
+// NPM dependencies
+import jwt from "jsonwebtoken";
+
+// extract the token methods
+const { sign, verify } = jwt;
+
+// create token from the payload
+const createToken = (payload) => {
+  const token = sign(
+    { ...payload, appName: process.env.APP_NAME },
+    process.env.JWT_SECRET,
+    {
+      expiresIn: process.env.JWT_TOKEN_EXPIRES_IN,
+    }
+  );
+
+  return token;
+};
+
+const verifyToken = (event) => {
+  const token = extractToken(event);
+  try {
+    const decoded = verify(token, process.env.JWT_SECRET);
+
+    // if the token has the correct data it is passed
+    if (decoded.appName === process.env.APP_NAME) {
+      return true;
+    }
+    return false;
+  } catch (error) {
+    return false;
+  }
+};
+
+const extractToken = (event) => {
+  const { headers } = event;
+  const tokenExtracted = headers.authorization
+    ? headers.authorization.replace("Bearer ", "")
+    : "";
+
+  return tokenExtracted;
+};
+
+export { createToken, verifyToken };

src/helpers/jwtHelpers.js

@@ -0,0 +1,9 @@
+const resolvers = {
+  Query: {
+    createToken: (_, args, context) => {
+      console.log("code reached");
+    },
+  },
+};
+
+export { resolvers };

src/resolvers/authResolver.js

@@ -1,12 +1,14 @@
 import { resolvers as helloResolvers } from "./helloResolver.js";
 import { resolvers as bookResolvers } from "./bookResolver.js";
 import { resolvers as authorResolvers } from "./authorResolver.js";
+import { resolvers as authResolvers } from "./authResolver.js";
 
 const resolvers = {
   Query: {
     ...bookResolvers.Query,
     ...helloResolvers.Query,
     ...authorResolvers.Query,
+    ...authResolvers.Query,
   },
   Mutation: {
     ...bookResolvers.Mutation,

src/resolvers/index.js

@@ -0,0 +1,13 @@
+import { gql } from "apollo-server-lambda";
+
+const authTypeDefs = gql`
+  # type definitions for authorization services
+  type Token {
+    token: String!
+  }
+  type Query {
+    createToken(username: String!, password: String!): Token!
+  }
+`;
+
+export { authTypeDefs };

src/typedefs/authTypedef.js

@@ -2,7 +2,9 @@
 import { booksTypeDefs } from "./bookTypedef.js";
 import { helloTypeDefs } from "./helloTypedef.js";
 import { authorsTypeDefs } from "./authorTypedef.js";
+import { authTypeDefs } from "./authTypedef.js";
 
-const typeDefs = [booksTypeDefs, helloTypeDefs, authorsTypeDefs];
+// merging all the type definitions in an array
+const typeDefs = [booksTypeDefs, helloTypeDefs, authorsTypeDefs, authTypeDefs];
 
 export { typeDefs };