(function() {
 
  window.main = function() {
    var log, source;
    log = document.getElementById('log');
    
    source = new EventSource('http://wafi.iit.cnr.it/asia/test/sse/sender.php');
    
    source.onopen = function() {
      return console.log('Connection established!\n');
    };

    // 'ping' event callback
    source.addEventListener('ping', (function(e) {
      var obj;
      obj = JSON.parse(e.data);

      // 0: end the connection with the EventSource
      if (obj.e_code == 0) {
        source.close();
      }
      // -1: debug printing on the console
      else if (obj.e_code == -1) {
        console.log("debug:" + obj.e_value);
      } 
      // -2: debug with an alert
      else if (obj.e_code == -2) {
        alert("debug:" + obj.e_value);
      } 
      // -3: debug printing on an html div
      else if (obj.e_code == -3) {
        $('#debug_message').text("debug:" + obj.e_value);
      } 
    }), false);
    
    return source.onerror = function(e) {
      return alert('Error!');
    };
  };
 
}).call(this);