Revise server code + a few fixes in trnalsations and ComputerGame

[vchess.git] / server / utils / access.js

var UserModel = require("../models/User");

module.exports =
{
  // Prevent access to "users pages"
  logged: function(req, res, next) {
    const callback = () => {
      if (!loggedIn)
        res.json({errmsg: "Not logged in"});
      else next();
    };
    let loggedIn = undefined;
    if (!req.cookies.token)
    {
      loggedIn = false;
      callback();
    }
    else
    {
      UserModel.getOne("sessionToken", req.cookies.token, function(err, user) {
        if (!!user)
        {
          req.userId = user.id;
          req.userName = user.name;
          loggedIn = true;
        }
        else
        {
          // Token in cookies presumably wrong: erase it
          res.clearCookie("token");
          loggedIn = false;
        }
        callback();
      });
    }
  },

  // Prevent access to "anonymous pages"
  unlogged: function(req, res, next) {
    // Just a quick heuristic, which should be enough
    const loggedIn = !!req.cookies.token;
    if (loggedIn)
      res.json({errmsg: "Already logged in"});
    else next();
  },

  // Prevent direct access to AJAX results
  ajax: function(req, res, next) {
    if (!req.xhr)
      res.json({errmsg: "Unauthorized access"});
    else next();
  },

  // Check for errors before callback (continue page loading). TODO: better name.
  checkRequest: function(res, err, out, msg, cb) {
    if (err)
      res.json({errmsg: err.errmsg || err.toString()});
    else if (!out
      || (Array.isArray(out) && out.length == 0)
      || (typeof out === "object" && Object.keys(out).length == 0))
    {
      res.json({errmsg: msg});
    }
    else cb();
  },
}