includes/export/DumpLatestFilter.php

   1 <?php
   2 /**
   3  * Dump output filter to include only the last revision in each page sequence.
   4  *
   5  * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * @ingroup Dump
  28  */
  29 class DumpLatestFilter extends DumpFilter {
  30         public $page;
  31
  32         public $pageString;
  33
  34         public $rev;
  35
  36         public $revString;
  37
  38         /**
  39          * @param object $page
  40          * @param string $string
  41          */
  42         function writeOpenPage( $page, $string ) {
  43                 $this->page = $page;
  44                 $this->pageString = $string;
  45         }
  46
  47         /**
  48          * @param string $string
  49          */
  50         function writeClosePage( $string ) {
  51                 if ( $this->rev ) {
  52                         $this->sink->writeOpenPage( $this->page, $this->pageString );
  53                         $this->sink->writeRevision( $this->rev, $this->revString );
  54                         $this->sink->writeClosePage( $string );
  55                 }
  56                 $this->rev = null;
  57                 $this->revString = null;
  58                 $this->page = null;
  59                 $this->pageString = null;
  60         }
  61
  62         /**
  63          * @param object $rev
  64          * @param string $string
  65          */
  66         function writeRevision( $rev, $string ) {
  67                 if ( $rev->rev_id == $this->page->page_latest ) {
  68                         $this->rev = $rev;
  69                         $this->revString = $string;
  70                 }
  71         }
  72 }