/**
 * AJAX form plugin for jQuery
 *
 * @copyright  Copyright (c) 2009 Jan Marek
 * @license    MIT
 * @link       http://nettephp.com/cs/extras/ajax-form
 * @version    0.1
 */

jQuery.fn.extend({
	ajaxSubmit: function (callback,e) {
		var form;
		var sendValues = {};

		// submit button
		if (this.is(":submit")) {
			form = this.parents("form");
			sendValues[this.attr("name")] = this.val() || "";

		// form
		} else if (this.is("form")) {
			form = this;

		// invalid element, do nothing
		} else {
			return null;
		}

                e.preventDefault();


		// validation
		if (form.get(0).onsubmit && !form.get(0).onsubmit()) {
                    e.stopImmediatePropagation();
                    return null;
                }
                
                if(form.data("ajaxSubmitCalled")==true) return null;

                form.data("ajaxSubmitCalled",true);

                // Tím, že zaregistruji ajaxové odeslání až teď, tak se provede jako poslední. (až po všem)
                form.one("submit",function(){
                    // get values
                    var values = form.serializeArray();

                    for (var i = 0; i < values.length; i++) {
                            var name = values[i].name;

                            // multi
                            if (name in sendValues) {
                                    var val = sendValues[name];

                                    if (!(val instanceof Array)) {
                                            val = [val];
                                    }

                                    val.push(values[i].value);
                                    sendValues[name] = val;
                            } else {
                                    sendValues[name] = values[i].value;
                            }
                    }

                    // send ajax request
                    var ajaxOptions = {
                            url: form.attr("action"),
                            data: sendValues,
                            type: form.attr("method") || "get"
                    };

                ajaxOptions.complete = function(){
                    form.data("ajaxSubmitCalled",false);
                }

		if (callback) {
                            ajaxOptions.success = callback;
		}
                    return jQuery.ajax(ajaxOptions);
                })

                e.stopImmediatePropagation();
                form.submit();
                return null;
            },

	    __submit: function(e) {
                $(this).ajaxSubmit(null,e);
	    },

	    enableAjaxSubmit: function() {
		    this.bind("submit",this.__submit);
		    $(":submit",this).bind("click",this.__submit);
	    },
	    disableAjaxSubmit: function() {
		    this.unbind("submit",this.__submit);
		    $(":submit",this).unbind("click",this.__submit);
	    }
});


// po načtení stránky
$(function () {
        // odeslání na formulářích
        $("form.ajax").livequery(function(){
		$(this).enableAjaxSubmit();
	});
});