/**
 * @file   common/js/xml_handler.js
 * @brief  XE에서 ajax기능을 이용함에 있어 module, act를 잘 사용하기 위한 자바스크립트
 **/

// xml handler을 이용하는 user function
var show_waiting_message = true;

/*  This work is licensed under Creative Commons GNU LGPL License.

    License: http://creativecommons.org/licenses/LGPL/2.1/
   Version: 0.9
    Author:  Stefan Goessner/2006
    Web:     http://goessner.net/
*/
function xml2json(xml, tab, ignoreAttrib) {
   var X = {
      toObj: function(xml) {
         var o = {};
         if (xml.nodeType==1) {   // element node ..
            if (ignoreAttrib && xml.attributes.length)   // element with attributes  ..
               for (var i=0; i<xml.attributes.length; i++)
                  o["@"+xml.attributes[i].nodeName] = (xml.attributes[i].nodeValue||"").toString();
            if (xml.firstChild) { // element has child nodes ..
               var textChild=0, cdataChild=0, hasElementChild=false;
               for (var n=xml.firstChild; n; n=n.nextSibling) {
                  if (n.nodeType==1) hasElementChild = true;
                  else if (n.nodeType==3 && n.nodeValue.match(/[^ \f\n\r\t\v]/)) textChild++; // non-whitespace text
                  else if (n.nodeType==4) cdataChild++; // cdata section node
               }
               if (hasElementChild) {
                  if (textChild < 2 && cdataChild < 2) { // structured element with evtl. a single text or/and cdata node ..
                     X.removeWhite(xml);
                     for (var n=xml.firstChild; n; n=n.nextSibling) {
                        if (n.nodeType == 3)  // text node
                           o = X.escape(n.nodeValue);
                        else if (n.nodeType == 4)  // cdata node
//                           o["#cdata"] = X.escape(n.nodeValue);
                            o = X.escape(n.nodeValue);
                        else if (o[n.nodeName]) {  // multiple occurence of element ..
                           if (o[n.nodeName] instanceof Array)
                              o[n.nodeName][o[n.nodeName].length] = X.toObj(n);
                           else
                              o[n.nodeName] = [o[n.nodeName], X.toObj(n)];
                        }
                        else  // first occurence of element..
                           o[n.nodeName] = X.toObj(n);
                     }
                  }
                  else { // mixed content
                     if (!xml.attributes.length)
                        o = X.escape(X.innerXml(xml));
                     else
                        o["#text"] = X.escape(X.innerXml(xml));
                  }
               }
               else if (textChild) { // pure text
                  if (!xml.attributes.length)
                     o = X.escape(X.innerXml(xml));
                  else
                     o["#text"] = X.escape(X.innerXml(xml));
               }
               else if (cdataChild) { // cdata
                  if (cdataChild > 1)
                     o = X.escape(X.innerXml(xml));
                  else
                     for (var n=xml.firstChild; n; n=n.nextSibling){
                        //o["#cdata"] = X.escape(n.nodeValue);
                        o = X.escape(n.nodeValue);
                  }
               }
            }
            if (!xml.attributes.length && !xml.firstChild) o = null;
         }
         else if (xml.nodeType==9) { // document.node
            o = X.toObj(xml.documentElement);
         }
         else
            alert("unhandled node type: " + xml.nodeType);
         return o;
      },
      toJson: function(o, name, ind) {
         var json = name ? ("\""+name+"\"") : "";
         if (o instanceof Array) {
            for (var i=0,n=o.length; i<n; i++)
               o[i] = X.toJson(o[i], "", ind+"\t");
            json += (name?":[":"[") + (o.length > 1 ? ("\n"+ind+"\t"+o.join(",\n"+ind+"\t")+"\n"+ind) : o.join("")) + "]";
         }
         else if (o == null)
            json += (name&&":") + "null";
         else if (typeof(o) == "object") {
            var arr = [];
            for (var m in o)
               arr[arr.length] = X.toJson(o[m], m, ind+"\t");
            json += (name?":{":"{") + (arr.length > 1 ? ("\n"+ind+"\t"+arr.join(",\n"+ind+"\t")+"\n"+ind) : arr.join("")) + "}";
         }
         else if (typeof(o) == "string")
            json += (name&&":") + "\"" + o.toString() + "\"";
         else
            json += (name&&":") + o.toString();
         return json;
      },
      innerXml: function(node) {
         var s = ""
         if ("innerHTML" in node)
            s = node.innerHTML;
         else {
            var asXml = function(n) {
               var s = "";
               if (n.nodeType == 1) {
                  s += "<" + n.nodeName;
                  for (var i=0; i<n.attributes.length;i++)
                     s += " " + n.attributes[i].nodeName + "=\"" + (n.attributes[i].nodeValue||"").toString() + "\"";
                  if (n.firstChild) {
                     s += ">";
                     for (var c=n.firstChild; c; c=c.nextSibling)
                        s += asXml(c);
                     s += "</"+n.nodeName+">";
                  }
                  else
                     s += "/>";
               }
               else if (n.nodeType == 3)
                  s += n.nodeValue;
               else if (n.nodeType == 4)
                  s += "<![CDATA[" + n.nodeValue + "]]>";
               return s;
            };
            for (var c=node.firstChild; c; c=c.nextSibling)
               s += asXml(c);
         }
         return s;
      },
      escape: function(txt) {
         return txt.replace(/[\\]/g, "\\\\")
                   .replace(/[\"]/g, '\\"')
                   .replace(/[\n]/g, '\\n')
                   .replace(/[\r]/g, '\\r');
      },
      removeWhite: function(e) {
         e.normalize();
         for (var n = e.firstChild; n; ) {
            if (n.nodeType == 3) {  // text node
               if (!n.nodeValue.match(/[^ \f\n\r\t\v]/)) { // pure whitespace text node
                  var nxt = n.nextSibling;
                  e.removeChild(n);
                  n = nxt;
               }
               else
                  n = n.nextSibling;
            }
            else if (n.nodeType == 1) {  // element node
               X.removeWhite(n);
               n = n.nextSibling;
            }
            else                      // any other node
               n = n.nextSibling;
         }
         return e;
      }
   };
   if (xml.nodeType == 9) // document node
      xml = xml.documentElement;

   var json_obj = X.toObj(X.removeWhite(xml)), json_str;
   
   if (typeof(JSON)=='object' && jQuery.isFunction(JSON.stringify) && false) {
	   var obj = {}; obj[xml.nodeName] = json_obj;
	   json_str = JSON.stringify(obj);
	   return json_str;
   } else {
	   json_str = X.toJson(json_obj, xml.nodeName, "");
	   return "{" + (tab ? json_str.replace(/\t/g, tab) : json_str.replace(/\t|\n/g, "")) + "}";
   }
}

(function($){
/**
 * @brief exec_xml
 * @author NHN (developers@xpressengine.com)
 **/
$.exec_xml = window.exec_xml = function(module, act, params, callback_func, response_tags, callback_func_arg, fo_obj) {
	var xml_path = request_uri+"index.php"
    if(!params) params = {};

	// {{{ set parameters
	if($.isArray(params)) params = arr2obj(params);
	params['module'] = module;
	params['act']    = act;

    if(typeof(xeVid)!='undefined') params['vid'] = xeVid;
    if(typeof(response_tags)=="undefined" || response_tags.length<1) response_tags = ['error','message'];
	else {
		response_tags.push('error', 'message');
	}
	// }}} set parameters

	// use ssl?
	if ($.isArray(ssl_actions) && params['act'] && $.inArray(params['act'], ssl_actions) >= 0)
	{
		var url    = default_url || request_uri;
		var port   = window.https_port || 443;
		var _ul    = $('<a>').attr('href', url)[0];
		var target = 'https://' + _ul.hostname.replace(/:\d+$/, '');

		if(port != 443) target += ':'+port;
		if(_ul.pathname[0] != '/') target += '/';
		
		target += _ul.pathname;
		xml_path = target.replace(/\/$/, '')+'/index.php';
	}

	var _u1 = $('<a>').attr('href', location.href)[0];
	var _u2 = $('<a>').attr('href', xml_path)[0];

	// 현 url과 ajax call 대상 url의 schema 또는 port가 다르면 직접 form 전송
	if(_u1.protocol != _u2.protocol || _u1.port != _u2.port) return send_by_form(xml_path, params);

	var xml = [], i = 0;
	xml[i++] = '<?xml version="1.0" encoding="utf-8" ?>';
	xml[i++] = '<methodCall>';
	xml[i++] = '<params>';

	$.each(params, function(key, val) {
		xml[i++] = '<'+key+'><![CDATA['+val+']]></'+key+'>';
	});

	xml[i++] = '</params>';
	xml[i++] = '</methodCall>';

	var _xhr = null;
	if (_xhr && _xhr.readyState != 0) _xhr.abort();

	// 전송 성공시
	function onsuccess(data, textStatus, xhr) {
		var resp_xml = $(data).find('response')[0], resp_obj, txt='', ret=[], tags={}, json_str='';

		waiting_obj.css('visibility', 'hidden');

		if(!resp_xml) {
			alert(_xhr.responseText);
			return null;
		}

		json_str = xml2json(resp_xml, false, false);
		resp_obj = (typeof(JSON)=='object' && $.isFunction(JSON.parse))?JSON.parse(json_str):eval('('+json_str+')');
		resp_obj = resp_obj.response;

		if (typeof(resp_obj)=='undefined') {
			ret['error'] = -1;
			ret['message'] = 'Unexpected error occured.';
			try {
				if(typeof(txt=resp_xml.childNodes[0].firstChild.data)!='undefined') ret['message'] += '\r\n'+txt;
			} catch(e){};
			return ret;
		}

		$.each(response_tags, function(key, val){ tags[val] = true; });
        tags["redirect_url"] = true;
        tags["act"] = true;
		$.each(resp_obj, function(key, val){ if(tags[key]) ret[key] = val; });

		if(ret['error'] != 0) {
			if ($.isFunction($.exec_xml.onerror)) {
				return $.exec_xml.onerror(module, act, ret, callback_func, response_tags, callback_func_arg, fo_obj);
			}

			alert(ret['message'] || 'error!');
			return null;
		}

		if(ret['redirect_url']) {
			location.href = ret['redirect_url'].replace(/&amp;/g, '&');
			return null;
		}

		if($.isFunction(callback_func)) callback_func(ret, response_tags, callback_func_arg, fo_obj);
	}

	// 모든 xml데이터는 POST방식으로 전송. try-catch문으로 오류 발생시 대처
	try {
		$.ajax({
			url         : xml_path,
			type        : 'POST',
			dataType    : 'xml',
			data        : xml.join('\n'),
			contentType : 'text/plain',
			beforeSend  : function(xhr){ _xhr = xhr; },
			success     : onsuccess,
			error       : function(xhr, textStatus) {
				waiting_obj.css('visibility', 'hidden');

				var msg = '';
				if (textStatus == 'parsererror') {
					msg  = 'The result is not valid XML :\n-------------------------------------\n';
					if(xhr.responseText == "") return;
					msg += xhr.responseText.replace(/<[^>]+>/g, '');
				} else {
					msg = textStatus;
				}

				alert(msg);
			}
		});
	} catch(e) {
		alert(e);
		return;
	}

	// ajax 통신중 대기 메세지 출력 (show_waiting_message값을 false로 세팅시 보이지 않음)
	var waiting_obj = $('#waitingforserverresponse');
	if(show_waiting_message && waiting_obj.length) {
		var d = $(document);
		waiting_obj.html(waiting_message).css({
			'top'  : (d.scrollTop()+20)+'px',
			'left' : (d.scrollLeft()+20)+'px',
			'visibility' : 'visible'
		});
	}
}
function send_by_form(url, params) {
	var frame_id = 'xeTmpIframe';
	var form_id  = 'xeVirtualForm';

	if (!$('#'+frame_id).length) {
		$('<iframe name="%id%" id="%id%" style="position:absolute;left:-1px;top:1px;width:1px;height:1px"></iframe>'.replace(/%id%/g, frame_id)).appendTo(document.body);
	}

	$('#'+form_id).remove();
	var form = $('<form id="%id%"></form>'.replace(/%id%/g, form_id)).attr({
		'id'     : form_id,
		'method' : 'post',
		'action' : url,
		'target' : frame_id
	});

	params['xeVirtualRequestMethod'] = 'xml';
	params['xeRequestURI']           = location.href.replace(/#(.*)$/i,'');
	params['xeVirtualRequestUrl']    = request_uri;

	$.each(params, function(key, value){
		$('<input type="hidden">').attr('name', key).attr('value', value).appendTo(form);
	});

	form.appendTo(document.body).submit();
}
function arr2obj(arr) {
	var ret = {};
	for(var key in arr) {
		if(arr.hasOwnProperty(key)) ret[key] = arr[key];		
	}
	return ret;
}

/**
 * @brief exec_json (exec_xml와 같은 용도)
 **/
$.exec_json = function(action,data,func){
    if(typeof(data) == 'undefined') data = {};
    action = action.split(".");
    if(action.length == 2){

        if(show_waiting_message) {
            $("#waitingforserverresponse").html(waiting_message).css('top',$(document).scrollTop()+20).css('left',$(document).scrollLeft()+20).css('visibility','visible');
        }

        $.extend(data,{module:action[0],act:action[1]});
        if(typeof(xeVid)!='undefined') $.extend(data,{vid:xeVid});
        $.ajax({
            type:"POST"
            ,dataType:"json"
            ,url:request_uri
            ,contentType:"application/json"
            ,data:$.param(data)
            ,success : function(data){
                $("#waitingforserverresponse").css('visibility','hidden');
                if(data.error > 0) alert(data.message);
                if($.isFunction(func)) func(data);
            }
        });
    }
};

$.fn.exec_html = function(action,data,type,func,args){
    if(typeof(data) == 'undefined') data = {};
    if(!$.inArray(type, ['html','append','prepend'])) type = 'html';

    var self = $(this);
    action = action.split(".");
    if(action.length == 2){
        if(show_waiting_message) {
            $("#waitingforserverresponse").html(waiting_message).css('top',$(document).scrollTop()+20).css('left',$(document).scrollLeft()+20).css('visibility','visible');
        }

        $.extend(data,{module:action[0],act:action[1]});
        $.ajax({
            type:"POST"
            ,dataType:"html"
            ,url:request_uri
            ,data:$.param(data)
            ,success : function(html){
                $("#waitingforserverresponse").css('visibility','hidden');
                self[type](html);
                if($.isFunction(func)) func(args);
            }
        });
    }
};
})(jQuery);
