email-verification-code-sendgrid/index.js

Using sendgrid, we added <strong>2 other functions</strong> to make the verification more secure and more intense.<br> Now you can confirm with a Token that is generated at the beginning, or confirm with the code and the token at the same time!

const nodemailer = require("nodemailer");
const TokenGenerator = require("uuid-token-generator");
const { addUser, removeUser, getUser, tokenExistence } = require("./func");
const sgMail = require('@sendgrid/mail')

sgMail.setApiKey(process.env.SENDGRID_API_KEY);


const getCode = function (email) {
  const oldData = getUser(email);
  console.log(oldData);
  let code, token;
  if (oldData) {
    if (new Date(oldData.expirateDate) > new Date()) {
      code = Number(oldData.code);
      token = oldData.token;
    } else removeUser(email);
  }
  code = code || Math.floor(Math.random() * 900000 + 100000);
  token = token || new TokenGenerator().generate();
  addUser(email, { code, token });
  return { code, token };
};

exports.sendCode = async function ({ smtpInfo, company, mailInfo }) {
  const { code, token } = getCode(mailInfo.emailReceiver);

const info2 ={
    from: company.email,
    to:mailInfo.emailReceiver,
    subject: mailInfo.subject,
    text: mailInfo.text ? mailInfo.text(code, token) : "",
    html: mailInfo.html ? mailInfo.html(code, token) : `The Confirmation Code is: ${code}`,
  }

  await sgMail.send(info2)
      .then(() => {}, error => {
          console.error(error);
      if (error.response) {
        console.error(error.response.body)
      }
    })
  console.log("Message sent:");
  console.log({ info2 });
};

exports.verifyCode = function (email, code) {
  const data = getUser(email);
  let error, reason;
  if (data) {
    if (new Date(data.expirateDate) > new Date()) {
      error = Number(data.code) !== Number(code);
      reason =
        Number(data.code) !== Number(code) ? "This code is not Valid!" : "";
      Number(data.code) === Number(code) ? removeUser(email) : "";
    } else {
      removeUser(email);
      error = true;
      reason = "This code has expirated, Please retry again!";
    }
  } else {
    error = true;
    reason = "Email not found!";
  }
  return {
    error,
    reason,
  };
};

exports.verifyToken = function (token) {
  const { data, email } = tokenExistence(token);
  if (data) {
    removeUser(email);
    if (new Date(data.expirateDate) > new Date())
      return {
        error: false,
        email,
        code: data.code,
      };
    return {
      error: true,
      reason:
        "This link has expired, Please re-send a verification code to Confirm your email!",
    };
  }
  return {
    error: true,
    reason: "Invalid Token!",
  };
};

exports.verifyBoth = function ({ code, token }) {
  const { data, email } = tokenExistence(token);
  if (data) {
    if (new Date(data.expirateDate) > new Date()) {
      if (data.code === code) {
        removeUser(email);
        return {
          error: false,
          email,
        };
      }
      return {
        error: true,
        reason: "This code is not Valid!",
      };
    }
    removeUser(email);
    return {
      error: true,
      reason:
        "This link has expired, Please re-send a verification code to Confirm your email!",
    };
  }
  return {
    error: true,
    reason: "Invalid Token!",
  };
};