summaryrefslogtreecommitdiff
path: root/maintenance/rebuildrecentchanges.php
blob: 18348258b04a8fd79e6743d1bcca972d85ba7bd6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
<?php
/**
 * Rebuild recent changes from scratch.  This takes several hours,
 * depending on the database size and server configuration.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Maintenance
 * @todo Document
 */

require_once __DIR__ . '/Maintenance.php';

/**
 * Maintenance script that rebuilds recent changes from scratch.
 *
 * @ingroup Maintenance
 */
class RebuildRecentchanges extends Maintenance {
	public function __construct() {
		parent::__construct();
		$this->mDescription = "Rebuild recent changes";
	}

	public function execute() {
		$this->rebuildRecentChangesTablePass1();
		$this->rebuildRecentChangesTablePass2();
		$this->rebuildRecentChangesTablePass3();
		$this->rebuildRecentChangesTablePass4();
		$this->purgeFeeds();
		$this->output( "Done.\n" );
	}

	/**
	 * Rebuild pass 1
	 * DOCUMENT ME!
	 */
	private function rebuildRecentChangesTablePass1() {
		$dbw = wfGetDB( DB_MASTER );

		$dbw->delete( 'recentchanges', '*' );

		$this->output( "Loading from page and revision tables...\n" );

		global $wgRCMaxAge;

		$this->output( '$wgRCMaxAge=' . $wgRCMaxAge );
		$days = $wgRCMaxAge / 24 / 3600;
		if ( intval( $days ) == $days ) {
			$this->output( " (" . $days . " days)\n" );
		} else {
			$this->output( " (approx. " . intval( $days ) . " days)\n" );
		}

		$cutoff = time() - $wgRCMaxAge;
		$dbw->insertSelect( 'recentchanges', array( 'page', 'revision' ),
			array(
				'rc_timestamp'  => 'rev_timestamp',
				'rc_cur_time'   => 'rev_timestamp',
				'rc_user'       => 'rev_user',
				'rc_user_text'  => 'rev_user_text',
				'rc_namespace'  => 'page_namespace',
				'rc_title'      => 'page_title',
				'rc_comment'    => 'rev_comment',
				'rc_minor'      => 'rev_minor_edit',
				'rc_bot'        => 0,
				'rc_new'        => 'page_is_new',
				'rc_cur_id'     => 'page_id',
				'rc_this_oldid' => 'rev_id',
				'rc_last_oldid' => 0, // is this ok?
				'rc_type'       => $dbw->conditional( 'page_is_new != 0', RC_NEW, RC_EDIT ),
				'rc_deleted'    => 'rev_deleted'
			), array(
				'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $cutoff ) ),
				'rev_page=page_id'
			), __METHOD__,
			array(), // INSERT options
			array( 'ORDER BY' => 'rev_timestamp DESC', 'LIMIT' => 5000 ) // SELECT options
		);
	}

	/**
	 * Rebuild pass 2
	 * DOCUMENT ME!
	 */
	private function rebuildRecentChangesTablePass2() {
		$dbw = wfGetDB( DB_MASTER );
		list( $recentchanges, $revision ) = $dbw->tableNamesN( 'recentchanges', 'revision' );

		$this->output( "Updating links and size differences...\n" );

		# Fill in the rc_last_oldid field, which points to the previous edit
		$sql = "SELECT rc_cur_id,rc_this_oldid,rc_timestamp FROM $recentchanges " .
			"ORDER BY rc_cur_id,rc_timestamp";
		$res = $dbw->query( $sql, DB_MASTER );

		$lastCurId = 0;
		$lastOldId = 0;
		foreach ( $res as $obj ) {
			$new = 0;
			if ( $obj->rc_cur_id != $lastCurId ) {
				# Switch! Look up the previous last edit, if any
				$lastCurId = intval( $obj->rc_cur_id );
				$emit = $obj->rc_timestamp;
				$sql2 = "SELECT rev_id,rev_len FROM $revision " .
					"WHERE rev_page={$lastCurId} " .
					"AND rev_timestamp<'{$emit}' ORDER BY rev_timestamp DESC";
				$sql2 = $dbw->limitResult( $sql2, 1, false );
				$res2 = $dbw->query( $sql2 );
				$row = $dbw->fetchObject( $res2 );
				if ( $row ) {
					$lastOldId = intval( $row->rev_id );
					# Grab the last text size if available
					$lastSize = !is_null( $row->rev_len ) ? intval( $row->rev_len ) : null;
				} else {
					# No previous edit
					$lastOldId = 0;
					$lastSize = null;
					$new = 1; // probably true
				}
			}
			if ( $lastCurId == 0 ) {
				$this->output( "Uhhh, something wrong? No curid\n" );
			} else {
				# Grab the entry's text size
				$size = $dbw->selectField( 'revision', 'rev_len', array( 'rev_id' => $obj->rc_this_oldid ) );

				$dbw->update( 'recentchanges',
					array(
						'rc_last_oldid' => $lastOldId,
						'rc_new' => $new,
						'rc_type' => $new,
						'rc_old_len' => $lastSize,
						'rc_new_len' => $size,
					), array(
						'rc_cur_id' => $lastCurId,
						'rc_this_oldid' => $obj->rc_this_oldid,
					),
					__METHOD__
				);

				$lastOldId = intval( $obj->rc_this_oldid );
				$lastSize = $size;
			}
		}
	}

	/**
	 * Rebuild pass 3
	 * DOCUMENT ME!
	 */
	private function rebuildRecentChangesTablePass3() {
		$dbw = wfGetDB( DB_MASTER );

		$this->output( "Loading from user, page, and logging tables...\n" );

		global $wgRCMaxAge, $wgLogTypes, $wgLogRestrictions;
		// Some logs don't go in RC. This should check for that
		$basicRCLogs = array_diff( $wgLogTypes, array_keys( $wgLogRestrictions ) );

		// Escape...blah blah
		$selectLogs = array();
		foreach ( $basicRCLogs as $logtype ) {
			$safetype = $dbw->strencode( $logtype );
			$selectLogs[] = "'$safetype'";
		}

		$cutoff = time() - $wgRCMaxAge;
		list( $logging, $page ) = $dbw->tableNamesN( 'logging', 'page' );
		$dbw->insertSelect( 'recentchanges', array( 'user', "$logging LEFT JOIN $page ON (log_namespace=page_namespace AND log_title=page_title)" ),
			array(
				'rc_timestamp'  => 'log_timestamp',
				'rc_cur_time'   => 'log_timestamp',
				'rc_user'       => 'log_user',
				'rc_user_text'  => 'user_name',
				'rc_namespace'  => 'log_namespace',
				'rc_title'      => 'log_title',
				'rc_comment'    => 'log_comment',
				'rc_minor'      => 0,
				'rc_bot'        => 0,
				'rc_patrolled'  => 1,
				'rc_new'        => 0,
				'rc_this_oldid' => 0,
				'rc_last_oldid' => 0,
				'rc_type'       => RC_LOG,
				'rc_cur_id'     => $dbw->cascadingDeletes() ? 'page_id' : 'COALESCE(page_id, 0)',
				'rc_log_type'   => 'log_type',
				'rc_log_action' => 'log_action',
				'rc_logid'      => 'log_id',
				'rc_params'     => 'log_params',
				'rc_deleted'    => 'log_deleted'
			), array(
				'log_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $cutoff ) ),
				'log_user=user_id',
				'log_type IN(' . implode( ',', $selectLogs ) . ')'
			), __METHOD__,
			array(), // INSERT options
			array( 'ORDER BY' => 'log_timestamp DESC', 'LIMIT' => 5000 ) // SELECT options
		);
	}

	/**
	 * Rebuild pass 4
	 * DOCUMENT ME!
	 */
	private function rebuildRecentChangesTablePass4() {
		global $wgUseRCPatrol;

		$dbw = wfGetDB( DB_MASTER );

		list( $recentchanges, $usergroups, $user ) = $dbw->tableNamesN( 'recentchanges', 'user_groups', 'user' );

		$botgroups = User::getGroupsWithPermission( 'bot' );
		$autopatrolgroups = $wgUseRCPatrol ? User::getGroupsWithPermission( 'autopatrol' ) : array();
		# Flag our recent bot edits
		if ( !empty( $botgroups ) ) {
			$botwhere = $dbw->makeList( $botgroups );
			$botusers = array();

			$this->output( "Flagging bot account edits...\n" );

			# Find all users that are bots
			$sql = "SELECT DISTINCT user_name FROM $usergroups, $user " .
				"WHERE ug_group IN($botwhere) AND user_id = ug_user";
			$res = $dbw->query( $sql, DB_MASTER );

			foreach ( $res as $obj ) {
				$botusers[] = $dbw->addQuotes( $obj->user_name );
			}
			# Fill in the rc_bot field
			if ( !empty( $botusers ) ) {
				$botwhere = implode( ',', $botusers );
				$sql2 = "UPDATE $recentchanges SET rc_bot=1 " .
					"WHERE rc_user_text IN($botwhere)";
				$dbw->query( $sql2 );
			}
		}
		global $wgMiserMode;
		# Flag our recent autopatrolled edits
		if ( !$wgMiserMode && !empty( $autopatrolgroups ) ) {
			$patrolwhere = $dbw->makeList( $autopatrolgroups );
			$patrolusers = array();

			$this->output( "Flagging auto-patrolled edits...\n" );

			# Find all users in RC with autopatrol rights
			$sql = "SELECT DISTINCT user_name FROM $usergroups, $user " .
				"WHERE ug_group IN($patrolwhere) AND user_id = ug_user";
			$res = $dbw->query( $sql, DB_MASTER );

			foreach ( $res as $obj ) {
				$patrolusers[] = $dbw->addQuotes( $obj->user_name );
			}

			# Fill in the rc_patrolled field
			if ( !empty( $patrolusers ) ) {
				$patrolwhere = implode( ',', $patrolusers );
				$sql2 = "UPDATE $recentchanges SET rc_patrolled=1 " .
					"WHERE rc_user_text IN($patrolwhere)";
				$dbw->query( $sql2 );
			}
		}
	}

	/**
	 * Purge cached feeds in $messageMemc
	 */
	private function purgeFeeds() {
		global $wgFeedClasses, $messageMemc;

		$this->output( "Deleting feed timestamps.\n" );

		foreach ( $wgFeedClasses as $feed => $className ) {
			$messageMemc->delete( wfMemcKey( 'rcfeed', $feed, 'timestamp' ) ); # Good enough for now.
		}
	}

}

$maintClass = "RebuildRecentchanges";
require_once RUN_MAINTENANCE_IF_MAIN;