/** RSS Parser Class         **/
/** Version 1.1              **/
/** 2006/1/18 By Yusuke Wada **/

class RssParser{
  
  private var rssUrl:String;
  private var rss:Rss;
  
  private var rssSource:XML;
  private var tempXml:XML;

  public var onParseEnd;

  //コンストラクタ
  public function RssParser(rssUrl:String){
    this.rssUrl = rssUrl;
    rssSource = new XML();
    rss = new Rss();
    
    tempXml = new XML();
    var thisObj:RssParser = this;
    
    rssSource = new XML();
    rssSource.ignoreWhite = true;
    rssSource.onLoad = function(success:Boolean){
      if(success){
        thisObj.tempXml = this;
        thisObj.execParse();
        }else{
          trace("RSSの取得に失敗");
        }
    }
    
  }
  
  private function getElementsByTagName(xmlArray:Array, tagname:String):Array{
    var Nodes:Array = new Array();
    for(var i=0; i < xmlArray.childNodes.length; i++){
      if( (xmlArray.childNodes[i].nodeType == 1) &&
          (xmlArray.childNodes[i].nodeName == tagname)){
        Nodes.push(xmlArray.childNodes[i]);
      }
      getElementsByTagName(xmlArray.childNodes[i],tagname);
    }
    return Nodes;
  }
  private function getTitleText(titleElement):String{
    return titleElement.firstChild.nodeValue;
  }

  private function execParse():Void{

    var rssVersion:String = new String();

    //RSSのバージョン判定
    if(tempXml.firstChild.attributes.version == "2.0"){
      //RSS2.0
      rssVersion = "2.0";
      trace("RSS2.0");
    }else if(tempXml.firstChild.nodeName.indexOf("http://purl.org/rss/1.0")!=-1){
      //RSS1.0
      rssVersion = "1.0";
      trace("RSS1.0");
    }else{
      //other version
      rssVersion = "other";
      trace("other");
    }
    
//    trace("nodeName: "+ tempXml.firstChild.nodeName);
//    trace("attributes: "+ tempXml.firstChild.attributes.version);
    
    var channelArr:Array = tempXml.firstChild.childNodes[0];
    this.rss.setTitle(getTitleText(getElementsByTagName(channelArr, "title")[0]));
    this.rss.setLink(getTitleText(getElementsByTagName(channelArr, "link")[0]));

    if(rssVersion == "1.0"){
      //RSS1.0の場合
      var tempArr = tempXml.firstChild.childNodes;
      for(var i = 0;i<tempArr.length;i++){
        var tempItemXml = new XML();
        var tempItemObj = new Object();
        if(tempArr[i].nodeName == "item"){
          tempItemXml.parseXML(getElementsByTagName(tempArr[i],"title"));
          tempItemObj.title = tempItemXml.firstChild.firstChild.nodeValue;
          tempItemXml.parseXML(getElementsByTagName(tempArr[i],"link"));
          tempItemObj.link = tempItemXml.firstChild.firstChild.nodeValue;
          tempItemXml.parseXML(getElementsByTagName(tempArr[i],"description"));
          if(tempItemXml.firstChild.firstChild.nodeValue != null){
            tempItemObj.description = tempItemXml.firstChild.firstChild.nodeValue;
          }else{
            tempItemObj.description = "";
          }
          tempItemXml.parseXML(getElementsByTagName(tempArr[i],"dc:date"));
          tempItemObj.date = getFlashDateFromDcdate(tempItemXml.firstChild.firstChild.nodeValue);
          rss.setItem(tempItemObj.title, tempItemObj.link, tempItemObj.description, tempItemObj.date);
        }
      }
    }else if(rssVersion == "2.0"){
      //RSS2.0の場合
      var itemsArr = getElementsByTagName(channelArr, "item");
      for(var i=0; i < itemsArr.length; i++){
        var tempItemXml = new XML();
        var tempItemObj = new Object();
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"title"));
        tempItemObj.title = tempItemXml.firstChild.firstChild.nodeValue;
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"link"));
        tempItemObj.link = tempItemXml.firstChild.firstChild.nodeValue;
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"description"));
//        tempItemObj.description = tempItemXml.firstChild.firstChild.nodeValue;
        if(tempItemXml.firstChild.firstChild.nodeValue != null){
          tempItemObj.description = tempItemXml.firstChild.firstChild.nodeValue;
        }else{
          tempItemObj.description = "";
        }
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"pubDate"));
        tempItemObj.date = getFlashDateFromPubdate(tempItemXml.firstChild.firstChild.nodeValue);
        rss.setItem(tempItemObj.title, tempItemObj.link, tempItemObj.description, tempItemObj.date);
      }   
    }else{
      //その他の場合
      var itemsArr = getElementsByTagName(channelArr, "item");
      for(var i=0; i < itemsArr.length; i++){
        var tempItemXml = new XML();
        var tempItemObj = new Object();
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"title"));
        tempItemObj.title = tempItemXml.firstChild.firstChild.nodeValue;
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"link"));
        tempItemObj.link = tempItemXml.firstChild.firstChild.nodeValue;
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"description"));
        //        tempItemObj.description = tempItemXml.firstChild.firstChild.nodeValue;
        if(tempItemXml.firstChild.firstChild.nodeValue != null){
          tempItemObj.description = tempItemXml.firstChild.firstChild.nodeValue;
        }else{
          tempItemObj.description = "";
        }
        tempItemXml.parseXML(getElementsByTagName(itemsArr[i],"pubDate"));
        rss.setItem(tempItemObj.title, tempItemObj.link, tempItemObj.description);
      }

    }
    var scope:RssParser = this;
    scope.onParseEnd({mes:"パース終了"});
  }

  private function getMonthAsNumber(month:String):Number {
    var monthNames_arr:Array = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
    var i:Number;
    for(i=0;i<12;i++){
      if(month == monthNames_arr[i]){
        break;
      }
    }
    return i;
  }

  private function getFlashDateFromPubdate(pubDate:String):Date{
    var temp_arr = pubDate.split(" ");
    var temp_obj = new Object();
    temp_obj.year = temp_arr[3];
    temp_obj.month = getMonthAsNumber(temp_arr[2]);
    temp_obj.day = temp_arr[1];
    var tempDay_arr = temp_arr[4].split(":");
    temp_obj.hour = tempDay_arr[0];
    temp_obj.min = tempDay_arr[1];
    temp_obj.sec = tempDay_arr[2];
    var day = new Date(temp_obj.year,temp_obj.month,temp_obj.day,temp_obj.hour,temp_obj.min,temp_obj.sec);
    return day;
  }
  
    private function getFlashDateFromDcdate(dcDate:String):Date{
      var temp_arr = dcDate.split("-");
      var temp_obj = new Object();

      temp_obj.year = temp_arr[0];
      temp_obj.month = temp_arr[1] - 1;
      temp_arr = temp_arr[2].split("T");
      temp_obj.day = temp_arr[0];
      temp_arr = temp_arr[1].split(":");
      temp_obj.hour = temp_arr[0];
      temp_obj.min = temp_arr[1];
      temp_arr = temp_arr[2].split("+");
      temp_obj.sec = temp_arr[0];
      trace(temp_obj.year + temp_obj.month+temp_obj.day+temp_obj.hour+temp_obj.min+temp_obj.sec);
      var day = new Date(temp_obj.year,temp_obj.month,temp_obj.day,temp_obj.hour,temp_obj.min,temp_obj.sec);
      return day;
  }
  
  public function parseRss():Void{
    rssSource.load(rssUrl);
  }
  public function getRss():Rss{
    return this.rss;
  }

}