includes/HistoryBlob.php

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