<?php


class feedData {
    var $meta_data;  // array of meta data entries from meta/newsfeed:pagedata.ser
    var $rss_data;   // array of data items, titles, anchor names from current file
	
	var $feedDataBaseNames;  // array of md5 basenames of files holding feed data
	var $currentMD5BaseName;
	var $currentDataArray;
	var $currentMetaArray;	
	var $newsFeedDate;
	var $helper;
    function __construct($subfeed) {    
		global $newsChannelTitle;
		global $newsChannelDescription;	
		global $newsChannelTtl;

        $this->helper = plugin_load('helper', 'news');
         $this->helper->setSubFeed($subfeed) ;    

        $metafile = $this->helper->getMetaFN('pagedata', '.ser');
		$this->meta_data = $this->_readFile($metafile, true);	
        uasort($this->meta_data,function($a,$b) {
            $ta = strtotime($a['create_time']);
            $tb = strtotime($b['create_time']);
            if ($ta==$tb) return 0;
            return ($ta>$tb)?-1:1;
        });
	
		$this->get_md5_array();
              
        $metafile = $this->helper->getMetaFN('timestamp','.meta') ;				        
		
        $this->newsFeedDate	= $this->_readFile($metafile);
			
	}

	function get_md5_array() {
	     $this->feedDataBaseNames = array(); 
		 $ar = array_keys($this->meta_data);
	      foreach($ar as $md5) {		     
              $file = $this->helper->getMetaFN($md5, '.gz');               
			  if(@file_exists($file)) {
			     $this->feedDataBaseNames[] = $md5; 
			  }
		  }
	}
	
	function _readFile($file, $ser=false) {
	    $ret = io_readFile($file,$ser);
		if($ser) {
		  if(!$ret) return array();
		  return unserialize($ret);
		  }
		return $ret;  
		
	}
	
	
    function description() {
            $this->currentDataArray['item'] =
                        preg_replace('#(href|src)\s*=\s*([\'\"])/.*?/#ms', "$1=$2" . $this->news_feed_url(), $this->currentDataArray['item']);

                        return $this->currentDataArray['item'];
    }
	
	
    function rss_id() {
		return $this->currentDataArray['name'];
    }
    function title() {
		return $this->currentDataArray['title'];
	     
    }
   
   function id() {
		return $this->currentMetaArray['id'];
    }
	
    function url() {	   
		return $this->currentMetaArray['url']; 
	}
	
    function timestamp() {
		return $this->currentMetaArray['time'];
	}
	
    function date($which='gm') {
		if($which == 'gm') {
            if($this->helper->getConf('createtime') && isset($this->currentMetaArray['create_time'])) {           
                 return $this->currentMetaArray['create_time'];
            }            
              else {
                 return $this->currentMetaArray['gmtime'];
              }
        }    
            
		return date('r',$this->timestamp());
    }      
    
      function news_feed_url() {
	  
           list($server,$rest) = explode('?', $this->url());
           if(!$server) $server = DOKU_URL;
		   
		   $server = str_replace('doku.php',"",$server); 
		   if(preg_match("#http://([^/]+)/([^/]+)/*$#", $server)) {			
					return $server;
			}
			
	     if(preg_match("#(?!:/)/([^/]+)/[^/]+/$#", $server)) {		      
				return preg_replace("#/[^/]+/*$#", "/",$server);
		   }
		   	 
		    return $server;
		  
        }
	
	function news_feed_date($which='gm') {
	    if($which == 'gm') return gmdate('r',$this->newsFeedDate);
	    return date('r',$this->newsFeedDate);
	}
	
	function md5_id() {
	   return $this->currentMD5BaseName;
	}
	
    function _dataFN() {
		$md5 = array_shift($this->feedDataBaseNames);
		if(!$md5) return false;
		$this->currentMD5BaseName = $md5;		                      
		return  $this->helper->getMetaFN($md5, '.gz');	         		
   }
   
   function testDataElements() {   	
   	
		$file = $this->_dataFN();
		$ar = $this->_readFile($file, true);
        for($i=0;$i<count($ar);$i++) {
			echo "Name: " . $ar[$i]['name'] ."\n";
			echo "Title: " . $ar[$i]['title'] ."\n";
			//echo "Item: " . $ar[$i]['item'] ."\n\n";
        }

   }
   
   function next_data_file() {
        $file = $this->_dataFN(); 
		if(!$file) {
		    $this->currentMetaArray = array();
			return;
		}
   		$this->rss_data = $this->_readFile($file, true);	
		$this->currentMetaArray = $this->meta_data[$this->currentMD5BaseName];	
	}
   
   
   function feed_data() { 
        if(is_array($this->currentDataArray)) {
			   $this->currentDataArray = array_shift($this->rss_data);
		}
		
       if(!$this->currentDataArray) {
	           $this->next_data_file();
			   $this->currentDataArray = array_shift($this->rss_data);
    	 }	   


		if(!$this->currentDataArray) return false;
		return true;

    }

	function channel_title() {
		global $newsChannelTitle;
		if(!$newsChannelTitle) return 'DokuWiki News Feed';
		return $newsChannelTitle;
	}
	
	function channel_description() {
		global $newsChannelDescription;
		if(!$newsChannelDescription) return  'DokuWiki News Feed';
		return $newsChannelDescription;
	}
	
	function channel_ttl() {
		global $newsChannelTtl;
		if(!$newsChannelTtl) return $this->ttl;
		return $newsChannelTtl;
	}
}

?>