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1<?php
2/**
3 * Dump output filter to include only the last revision in each page sequence.
4 *
5 * Copyright © 2003, 2005, 2006 Brooke Vibber <bvibber@wikimedia.org>
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 */
29class DumpLatestFilter extends DumpFilter {
30    /** @var stdClass|null */
31    public $page;
32
33    /** @var string|null */
34    public $pageString;
35
36    /** @var stdClass|null */
37    public $rev;
38
39    /** @var string|null */
40    public $revString;
41
42    /**
43     * @param stdClass $page
44     * @param string $string
45     */
46    public function writeOpenPage( $page, $string ) {
47        $this->page = $page;
48        $this->pageString = $string;
49    }
50
51    /**
52     * @param string $string
53     */
54    public function writeClosePage( $string ) {
55        if ( $this->rev ) {
56            $this->sink->writeOpenPage( $this->page, $this->pageString );
57            $this->sink->writeRevision( $this->rev, $this->revString );
58            $this->sink->writeClosePage( $string );
59        }
60        $this->rev = null;
61        $this->revString = null;
62        $this->page = null;
63        $this->pageString = null;
64    }
65
66    /**
67     * @param stdClass $rev
68     * @param string $string
69     */
70    public function writeRevision( $rev, $string ) {
71        if ( $rev->rev_id == $this->page->page_latest ) {
72            $this->rev = $rev;
73            $this->revString = $string;
74        }
75    }
76}