/*
	jQuery asynchronous fileuploader

	author: 	Jakob Dam Jensen
	contact:	jakobdj@gmail.com
	date:		2007-09-11
	version: 	0.1

	edited by quode

*/

(function($) {

	$.fn.handleUpload = function(options) {

		// replace empty options with default option values.
		options = jQuery.extend({
			loadingMsg:		"Uploading, please wait.",
			completeMsg:	"File uploaded.",
			fileHandlerUrl:	"",
			iframeId:		"secretIframe",
			disableForm:	false,
			showErrors:		true,
			printTxtIn:		"",
			submitButtonId:	"",
			beforeCallback: null,
			afterCallback: null,
			finalyCallback: null
		}, options);

		var curForm = $(this);

		if(options['submitButtonId'] == ""){
			pe('submitButtonId not set. This will not work.', options['showErrors']);
			return false;
		}
		if(options['fileHandlerUrl'] == ""){
			pe('fileHandlerUrl not set. This will probably not work.', options['showErrors']);
			return false;
		}

		$("#"+options['submitButtonId']).click(function(){
			if (options.beforeCallback) {
			 if (!options.beforeCallback()) {
			   if (options.finalyCallback) {
			    options.finalyCallback();
			   }
			   return false;
			 }
			}
			$("#"+options['printTxtIn']).html(options['loadingMsg']);
			if(createIframe(options['iframeId'])){
				setupForm($(curForm).attr("id"), options['iframeId'], options['fileHandlerUrl']);
				bindIframeEvents(options['iframeId'], options);
			}
		});
	}

	// This is used to se if the iFrame content is done loading.
	var bindIframeEvents = function(id, options)
	{
		$("#"+id).load(function(){
			$("#"+id).ready(function(){
				//$("#"+options['printTxtIn']).html(options['completeMsg']);
				//$("#"+id).remove(); // This makes Firefox never stop loading. It makes sense, but how do I fix it?
				//okfirefox//alert(document.getElementById(id).contentDocument.body.innerHTML);
				//alert(document.getElementById(id).contentWindow.document.body.innerHTML);
				if (options.afterCallback) {
				 var e;
				 if (document.getElementById(id).contentDocument) {
				  e = document.getElementById(id).contentDocument;
				 }
				 else {
				  e = document.getElementById(id).contentWindow.document;
				 }
				 options.afterCallback(e.body.innerHTML);
				}
	   if (options.finalyCallback) {
	    options.finalyCallback();
	   }
			});
		});
	}


	var pe = function(errorMsg, showIt)
	{
		if(showIt)
			alert(errorMsg);
	}

	var setupForm = function(formId, iframeId, url_action)
	{
		$("#"+formId).attr("target",iframeId);
		$("#"+formId).attr("action",url_action);
		$("#"+formId).attr("method","post");
		$("#"+formId).attr("enctype","multipart/form-data");
		$("#"+formId).attr("encoding","multipart/form-data");

		$("#"+formId).submit();
	}

	var createIframe = function(id)
	{
	 if (document.getElementById(id)) {
		  document.body.removeChild(document.getElementById(id));
		}
		if($("body").append('<iframe id="'+id+'" name="'+id+'" style="width: 0; height: 0; border: 0px;" width="0" height="0" border="0"/>'))
			return true;
	}
})(jQuery);