/**
 *ajaxContent - jQuery plugin for accessible, unobtrusive and easy ajax behaviour.
 * @Version 2.1 Beta
 * 
 * @requires jQuery v 1.2+
 * 
 * http://www.andreacfm.com/index.cfm/jquery-plugins
 *
 * Copyright (c) 2007 Andrea Campolonghi (andreacfm.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 */
  //make $ surely available inside the PI as jQuery shortcut
(function($) {
    //call teh method with options arguments
    $.fn.ajaxContent = function(options) {
        //extend to defaults
        var defaults = $.extend({}, $.fn.ajaxContent.defaults, options);
            // debug if required        
            if(defaults.debug == 'true'){
                debug(this);
            };
            //Initilaize any instance looping on the match element
            return this.each(function(){
                //set local variables and extend to the metadata plugin if loaded
                var $obj = $(this);
                var href = $obj.attr('href');
                var o = $.metadata ? $.extend({}, defaults, $obj.metadata()) : defaults;
                // add binding change events on url if required
                if(o.bind != ''){
                    var binds = o.bind.split(',');
                    for(var i=0; i < binds.length ; i++){
                        var queryString = setQueryString(binds);
                        var url = href + queryString;
                        $obj.attr({href:url});
                        if ($(binds[i]).attr('type') == "radio" || $(binds[i]).attr('type') == "checkbox"){
                            $('input[name=' + $(binds[i]).attr("name") + ']').change(function(){
                                var queryString = setQueryString(binds);
                                var url = href + queryString;
                                $obj.attr({href:url});                        
                            });
                            }else{
                            $(binds[i]).change(function(){
                                var queryString = setQueryString(binds);
                                var url = href + queryString;
                                $obj.attr({href:url});                        
                            });
                        }                            
                    }
                }
                var $target = $(o.target);

            //bind the event
            $obj.bind(o.event, function(ev){
                // add loader if required
                if(o.loader == 'true'){
                    if(o.loaderType == 'img'){
                             $target.html('<img src="' + o.loadingMsg + '"/>');
                         }else{
                             $target.html(o.loadingMsg);
                             }
                     } 
                    //remove add current class
                    $('a.' + o.currentClass).removeClass(o.currentClass);                                
                    $obj.addClass(o.currentClass);
                    // make the call
                    $.ajax({ 
                          type: o.type, 
                          url: $obj.attr('href'),
                          cache:'false',
                          beforeSend:function(){
                              if(typeof o.beforeSend == 'function'){
                                  o.beforeSend($obj,$target,ev);
                                  }
                          },
                          success: function(msg){ 
                            $target.html(msg);
                            if(o.extend == 'true'){
                                $(o.filter,$target).ajaxContent({
                                    target:o.ex_target,
                                    type:o.ex_type,
                                    event:o.ex_event,
                                    loader:o.ex_loader,
                                    loaderType:o.ex_loaderType,
                                    loadingMsg:o.ex_loadingMsg,
                                    errorMsg:o.ex_errorMsg,
                                    currentClass:o.ex_currentClass,
                                    success:o.ex_success,
                                    beforeSend:o.ex_beforeSend,
                                    error:o.ex_error,
                                    bind:o.ex_bind
                                });
                            }
                            //if a callback exist pass arguments ( object,target and receive message)
                            if(typeof o.success == 'function'){
                                o.success($obj,$target,msg);
                                }                          
                            },
                        error: function(){
                            $target.html("<p>" + o.errorMsg + "</p>");
                            if(typeof o.error == 'function'){
                                o.error($target);
                                }                          
                         
                        }
                    });
                return false;
            });
        });
    };    
      function debug($obj) {
    if (window.console && window.console.log)
     window.console.log('selection count: ' + $obj.size() + '  with class:' + $obj.attr('class'));
      };
      function setQueryString(binds){
          var queryString = '?';
          for(var i=0; i < binds.length; i++){
              if ($(binds[i]).attr('type') == "radio"){
                queryString += $('input[name=' + $(binds[i]).attr("name") + ']').fieldSerialize();
              }else if($(binds[i]).attr('type') == "checkbox"){
                  queryString += $(binds[i]).attr("name") + '=' + $('input[name=' + $(binds[i]).attr("name") + ']').fieldValue();
              }
              else{
                  queryString += $(binds[i]).fieldSerialize();    
              }    
              if(i != binds.length - 1){
                  queryString += '&';
              }
          }
    return queryString;
      };
})(jQuery);

$.fn.ajaxContent.defaults = {
        target: '#ajaxContent',
        type:'get',
        event:'click',
        loader:'true',
        loaderType:'text',
        loadingMsg:'Загрузка...',
        errorMsg:'Ошибка при загрузке страницы!',
        currentClass:'selected',
        success:'',
        beforeSend:'',
        error:'',
        bind:'',
        debug:'false',
        extend:'false',
        filter:'',
        ex_target:'',
        ex_type:'get',
        ex_event:'click',
        ex_loader:'true',
        ex_loaderType:'text',
        ex_loadingMsg:'Загрузка...',
        ex_errorMsg:'Ошибка при загрузке страницы!',
        ex_currentClass:'selected',
        ex_success:'',
        ex_beforeSend:'',
        ex_error:'',
        ex_bind:''
};