Tedious simplewait

// this is NodeJS connecting to SQL Server using tedious http://pekim.github.io/tedious/ 
// which supports only one active db input at a time
// So I run the connections through a helper functions that disables input until the request is done
// It also checks availability by running itself recursively.
// 
// Used in backend NodeJS app for an AngularJS Angular UI Calendar (FullCalendar) app
//
//
// below excerpt fromsendMail.js module:

var connection = require('../public/javascripts/dbConn.js');

exports.simpleWait = var simpleWait = function(request) {
  if (GLOBAL.wait) {
    setTimeout(function() {
      simpleWait(request);
    }, 50);
    return;
  }
  GLOBAL.wait = true;
  connection.execSql(request);
};

//
// below excerpt from events.js module:

var Request = require('tedious').Request;

/*jshint multistr: true */
var request = new Request("INSERT INTO dbo.events \
                          VALUES('" + mapping.title + "', \
                          '" + mapping.startdt + "', \
                          '" + mapping.enddt + "', \
                          '" + mapping.category + "', \
                          '" + (mapping.coordinator ? mapping.coordinator.pid : "") + "', \
                          '" + mapping.description + "', \
                          '', \
                          '" + mapping.repeat + "', \
                          '0', \
                          '" + mapping.authorFirstName + "', \
                          '" + mapping.authorLastName + "', \
                          '" + mapping.authorPid + "', \
                          '" + mapping.datePublished + "', \
                          '" + mapping.address + "'\
                          )", function(err, rowCount, rows) {
  if (err)
    throw err;

  // open db for new connections:
  GLOBAL.wait = false;
  
  if (rows) {
    // business logic here
  }
});
  
connection.simpleWait(request);
res.send('Yeah!');