includes/HistoryBlob.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Pure virtual parent
   9  * @package MediaWiki
  10  */
  11 class HistoryBlob
  12 {
  13         function setMeta() {}
  14         function getMeta() {}
  15         function addItem() {}
  16         function getItem() {}
  17 }
  18
  19 /**
  20  * The real object
  21  * @package MediaWiki
  22  */
  23 class ConcatenatedGzipHistoryBlob
  24 {
  25         /* private */ var $mVersion = 0, $mCompressed = false, $mItems = array();
  26
  27         function HistoryBlob() {
  28                 if ( !function_exists( 'gzdeflate' ) ) {
  29                         die( "Need zlib support to read or write this kind of history object (ConcatenatedGzipHistoryBlob)\n" );
  30                 }
  31         }
  32
  33         function setMeta( $metaData ) {
  34                 $this->uncompress();
  35                 $this->mItems['meta'] = $metaData;
  36         }
  37
  38         function getMeta() {
  39                 $this->uncompress();
  40                 return $this->mItems['meta'];
  41         }
  42
  43         function addItem( $text ) {
  44                 $this->uncompress();
  45                 $this->mItems[md5($text)] = $text;
  46         }
  47
  48         function getItem( $hash ) {
  49                 $this->compress();
  50                 return $this->mItems[$hash];
  51         }
  52
  53         function compress() {
  54                 if ( !$this->mCompressed  ) {
  55                         $this->mItems = gzdeflate( serialize( $this->mItems ) );
  56                         $this->mCompressed = true;
  57                 }
  58         }
  59
  60         function uncompress() {
  61                 if ( $this->mCompressed ) {
  62                         $this->mItems = unserialize( gzinflate( $this->mItems ) );
  63                 }
  64         }
  65
  66         function __sleep() {
  67                 compress();
  68         }
  69
  70         function __wakeup() {
  71                 uncompress();
  72         }
  73 }
  74 ?>