lab.js

var express = require('express');
var lab = express.Router();
var external = express.Router();

var userManagement = require('./userManagement');
var common = require('./common');

var labActions = {};

var labStatus = {
  open: false,
  members: {}
};

var names = {};

lab.get('/status', function(req, res){
  res.send({"open":labStatus.open, "members":names});
});

external.get('/status', function(req, res){
  res.send({"open":labStatus.open, "members":names});
});

lab.post('/close', common.authInRequest, function(req, res){
  var user = req.user;
  if(user.labMonitor == 'true'){
      res.send('0').end();
      labActions.closeLab();
  }else{
    res.end();
  }
});

lab.post('/swipe', common.idNumberInRequest, function(req, res){
  processSwipe(req.user, res);
});

external.post('/kick', common.loggedIn, function(req, res){
  if(req.user.labMonitor != 'true' && req.user.exec != 'true' && req.user.admin != 'true'){
    res.end();
  }
  userManagement.getUserByUsername(req.body.idNumber, function(user){
    processSwipe(user, res);
  });
});

labActions.closeLab = function(){
  labStatus.open = false;
  labStatus.members = {};
  names = {};
};

labActions.updateList = function(){
  names = {};
  for (var idNumber in labStatus.members){
    userManagement.getUser(idNumber, function(user){
      names[user.username] = toDisp(user);
      labStatus.members[user.idNumber] = user;
    });
  }
};

function processSwipe(user, res){
    if( !labStatus.open && user.labMonitor == 'false'){
      res.send("1").end();
      return;
    }
    if(labStatus.members[user.idNumber] == undefined){
      if(user.needsPassword == 'true'){
        res.send("4").end();
        return;
      }
      swipeIn(user);
    }else{
      var numLabMonitors = countLabMonitorsInLab();
      if(numLabMonitors > 1 || user.labMonitor == 'false' || Object.keys(names).length == 1){
        swipeOut(user)
      }else{
        res.send("3").end();
        return;
      }
    }
    res.send("0").end();
    labStatus.open = countLabMonitorsInLab() > 0;
}

function swipeIn(user){
  labStatus.members[user.idNumber] = user;
  labStatus.open = true;
  names[user.username] = toDisp(user);
}

function toDisp(user){
  if(common.isValidNickname(user.nickname)){
    return user.name + " (" + user.nickname + ")";
  }
  return user.name;
}

function swipeOut(user){
  delete labStatus.members[user.idNumber];
  delete names[user.username];
}

function countLabMonitorsInLab(){
  var count = 0;
  for(i in labStatus.members){
    if(labStatus.members[i].labMonitor == 'true'){
      count += 1;
    }
  }
  return count;
}
module.exports = {'internal': lab, 'external': external, 'labActions': labActions};