(function( $ ){
  
  var methods = {
    init : function( options ) {

      return this.each( function () {
      
        var $this = $(this);
        
        $.each(options, function( label, setting ) {
          $this.data(label, setting);
        });
     
        $this.bind('dragenter.dndUploader', methods.dragEnter);
        $this.bind('dragover.dndUploader', methods.dragOver);
        $this.bind('drop.dndUploader', methods.drop);
    
      });
    },
    
    dragEnter : function ( event ) {    
      event.stopPropagation();
      event.preventDefault();
      
      return false;
    },
    
    dragOver : function ( event ) {      
      event.stopPropagation();
      event.preventDefault();
                  
      return false;
    },

    drop : function( event ) {    
      event.stopPropagation();
      event.preventDefault();
      
      var $this = $(this);
      var dataTransfer = event.originalEvent.dataTransfer;
      
      if (dataTransfer.files.length > 0) {
        $.each(dataTransfer.files, function ( i, file ) {
          var xhr    = new XMLHttpRequest();
          var upload = xhr.upload;
          
          xhr.open($this.data('method') || 'POST', $this.data('url'), true);
          xhr.setRequestHeader('X-Filename', file.fileName);
          
          xhr.send(file);
        });
      };
            
      return false;
    }
  };
  
  $.fn.dndUploader = function( method ) {
    if ( methods[method] ) {
      return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
    } else if ( typeof method === 'object' || ! method ) {
      return methods.init.apply( this, arguments );
    } else {
      $.error( 'Method ' +  method + ' does not exist on jQuery.dndUploader' );
    }
  };
})( jQuery );