How to use

escapeRegExp

function

in

LoDashStatic

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

/**
 * Escapes the control characters of a given string.
 * @param {string} s - A string to escape.
 * @returns {string} An escaped string.
 */
function escape(s) {
  const isOneChar = s.length === 1;

  s = lodash.escapeRegExp(s);
  return isOneChar ? s : `(?:${s})`;
}

/**
     * Gets the index of a given variable name in a given comment.
     * @param {eslint-scope.Variable} variable - A variable to get.
     * @param {ASTNode} comment - A comment node which includes the variable name.
     * @returns {number} The index of the variable name's location.
     * @private
     */
    function getColumnInComment(variable, comment) {
      const namePattern = new RegExp(`[\\s,]${lodash.escapeRegExp(variable.name)}(?:$|[\\s,:])`, "g");

      // To ignore the first text "global".
      namePattern.lastIndex = comment.value.indexOf("global") + 6;

      // Search a given variable name.
      const match = namePattern.exec(comment.value);

      return match ? match.index + 1 : 0;
    }

function checkOrigin(origin, settings) {
 if (_.isString(settings)) {
  if (settings.indexOf(origin) !== -1) return true;

  if (settings.indexOf("*") !== -1) {
   // Based on: https://github.com/hapijs/hapi
   // eslint-disable-next-line
   const wildcard = new RegExp(`^${_.escapeRegExp(settings).replace(/\\\*/g, ".*").replace(/\\\?/g, ".")}$`);
   return origin.match(wildcard);
  }
 } else if (Array.isArray(settings)) {
  for (let i = 0; i < settings.length; i++) {
   if (checkOrigin(origin, settings[i])) {
    return true;
   }
  }
 }

 return false;
}

app.post("/login", async (req, res) => {
  try {
   let user = await UsersModel.findOne({
    username: { $regex: _.escapeRegExp(req.body.username), $options: "i" }
   })
    .lean()
    .exec();
   if (user && bcrypt.compareSync(req.body.password, user.password)) {
    const token = createToken({ id: user._id, username: user.username });
    res.cookie("token", token, {
     httpOnly: true
    });

    res.status(200).send({ message: "User login success." });
   } else
    res
     .status(400)
     .send({ message: "User not exist or password not correct" });
  } catch (e) {
   console.error("E, login,", e);
   res.status(500).send({ message: "some error" });
  }
 });

app.post("/register", async (req, res) => {
  try {
   let user = await UsersModel.findOne({
    username: { $regex: _.escapeRegExp(req.body.username), $options: "i" }
   })
    .lean()
    .exec();
   if (user) {
    return res.status(400).send({ message: "User already exist" });
   }

   user = await UsersModel.create({
    username: req.body.username,
    password: req.body.password
   });

   const token = createToken({ id: user._id, username: user.username });

   res.cookie("token", token, {
    httpOnly: true
   });

   res.status(200).send({ message: "User created." });
  } catch (e) {
   console.error("E, register,", e);
   res.status(500).send({ message: "some error" });
  }
 });

const escapeStr = (path) => _.escapeRegExp(path).replace(digitsPlaceholder, '\\d+')

function checkOrigin(origin, settings) {
  if (_.isString(settings)) {
    if (settings.indexOf(origin) !== -1)
      return true;

    if (settings.indexOf("*") !== -1) {
      // Based on: https://github.com/hapijs/hapi
      // eslint-disable-next-line
      const wildcard = new RegExp(`^${_.escapeRegExp(settings).replace(/\\\*/g, ".*").replace(/\\\?/g, ".")}$`)
      return origin.match(wildcard);
    }
  } else if (Array.isArray(settings)) {
    for(let i = 0; i < settings.length; i++) {
      if (checkOrigin(origin, settings[i])) {
        return true;
      }
    }
  }

  return false;
}