4 * Created on Sep 7, 2006
6 * API for MediaWiki 1.8+
8 * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 * http://www.gnu.org/copyleft/gpl.html
26 if (!defined('MEDIAWIKI')) {
27 // Eclipse helper - will be ignored in production
28 require_once ('ApiQueryBase.php');
32 * A query action to enumerate revisions of a given page, or show top revisions of multiple pages.
33 * Various pieces of information may be shown - flags, comments, and the actual wiki markup of the rev.
34 * In the enumeration mode, ranges of revisions may be requested and filtered.
38 class ApiQueryRevisions
extends ApiQueryBase
{
40 public function __construct($query, $moduleName) {
41 parent
:: __construct($query, $moduleName, 'rv');
44 private $fld_ids = false, $fld_flags = false, $fld_timestamp = false, $fld_size = false,
45 $fld_comment = false, $fld_user = false, $fld_content = false, $fld_tags = false;
47 protected function getTokenFunctions() {
48 // tokenname => function
49 // function prototype is func($pageid, $title, $rev)
50 // should return token or false
52 // Don't call the hooks twice
53 if(isset($this->tokenFunctions
))
54 return $this->tokenFunctions
;
56 // If we're in JSON callback mode, no tokens can be obtained
57 if(!is_null($this->getMain()->getRequest()->getVal('callback')))
60 $this->tokenFunctions
= array(
61 'rollback' => array( 'ApiQueryRevisions', 'getRollbackToken' )
63 wfRunHooks('APIQueryRevisionsTokens', array(&$this->tokenFunctions
));
64 return $this->tokenFunctions
;
67 public static function getRollbackToken($pageid, $title, $rev)
70 if(!$wgUser->isAllowed('rollback'))
72 return $wgUser->editToken(array($title->getPrefixedText(),
73 $rev->getUserText()));
76 public function execute() {
77 $params = $this->extractRequestParams(false);
79 // If any of those parameters are used, work in 'enumeration' mode.
80 // Enum mode can only be used when exactly one page is provided.
81 // Enumerating revisions on multiple pages make it extremely
82 // difficult to manage continuations and require additional SQL indexes
83 $enumRevMode = (!is_null($params['user']) ||
!is_null($params['excludeuser']) ||
84 !is_null($params['limit']) ||
!is_null($params['startid']) ||
85 !is_null($params['endid']) ||
$params['dir'] === 'newer' ||
86 !is_null($params['start']) ||
!is_null($params['end']));
89 $pageSet = $this->getPageSet();
90 $pageCount = $pageSet->getGoodTitleCount();
91 $revCount = $pageSet->getRevisionCount();
93 // Optimization -- nothing to do
94 if ($revCount === 0 && $pageCount === 0)
97 if ($revCount > 0 && $enumRevMode)
98 $this->dieUsage('The revids= parameter may not be used with the list options (limit, startid, endid, dirNewer, start, end).', 'revids');
100 if ($pageCount > 1 && $enumRevMode)
101 $this->dieUsage('titles, pageids or a generator was used to supply multiple pages, but the limit, startid, endid, dirNewer, user, excludeuser, start and end parameters may only be used on a single page.', 'multpages');
103 if (!is_null($params['diffto'])) {
104 if ($params['diffto'] == 'cur')
105 $params['diffto'] = 0;
106 if ((!ctype_digit($params['diffto']) ||
$params['diffto'] < 0)
107 && $params['diffto'] != 'prev' && $params['diffto'] != 'next')
108 $this->dieUsage('rvdiffto must be set to a non-negative number, "prev", "next" or "cur"', 'diffto');
109 // Check whether the revision exists and is readable,
110 // DifferenceEngine returns a rather ambiguous empty
111 // string if that's not the case
112 if ($params['diffto'] != 0) {
113 $difftoRev = Revision
::newFromID($params['diffto']);
115 $this->dieUsageMsg(array('nosuchrevid', $params['diffto']));
116 if (!$difftoRev->userCan(Revision
::DELETED_TEXT
)) {
117 $this->setWarning("Couldn't diff to r{$difftoRev->getID()}: content is hidden");
118 $params['diffto'] = null;
123 $db = $this->getDB();
124 $this->addTables(array('page', 'revision'));
125 $this->addFields(Revision
::selectFields());
126 $this->addWhere('page_id = rev_page');
128 $prop = array_flip($params['prop']);
131 $this->fld_ids
= isset ($prop['ids']);
132 // $this->addFieldsIf('rev_text_id', $this->fld_ids); // should this be exposed?
133 $this->fld_flags
= isset ($prop['flags']);
134 $this->fld_timestamp
= isset ($prop['timestamp']);
135 $this->fld_comment
= isset ($prop['comment']);
136 $this->fld_size
= isset ($prop['size']);
137 $this->fld_tags
= isset ($prop['tags']);
138 $this->fld_user
= isset ($prop['user']);
139 $this->token
= $params['token'];
140 $this->diffto
= $params['diffto'];
142 if ( !is_null($this->token
) ||
$pageCount > 0) {
143 $this->addFields( Revision
::selectPageFields() );
146 if ($this->fld_tags ||
!is_null($params['tag'])) {
147 $this->addTables('tag_summary');
148 $this->addJoinConds(array('tag_summary' => array('LEFT JOIN', array('rev_id=ts_rev_id'))));
149 $this->addFields('ts_tags');
152 if( !is_null($params['tag']) ) {
153 $this->addWhereFld('ts_tags', $params['tag']);
156 if (isset ($prop['content'])) {
158 // For each page we will request, the user must have read rights for that page
159 foreach ($pageSet->getGoodTitles() as $title) {
160 if( !$title->userCanRead() )
162 'The current user is not allowed to read ' . $title->getPrefixedText(),
166 $this->addTables('text');
167 $this->addWhere('rev_text_id=old_id');
168 $this->addFields('old_id');
169 $this->addFields(Revision
::selectTextFields());
171 $this->fld_content
= true;
173 $this->expandTemplates
= $params['expandtemplates'];
174 $this->generateXML
= $params['generatexml'];
175 if(isset($params['section']))
176 $this->section
= $params['section'];
178 $this->section
= false;
181 $userMax = ( $this->fld_content ? ApiBase
::LIMIT_SML1
: ApiBase
::LIMIT_BIG1
);
182 $botMax = ( $this->fld_content ? ApiBase
::LIMIT_SML2
: ApiBase
::LIMIT_BIG2
);
183 $limit = $params['limit'];
184 if( $limit == 'max' ) {
185 $limit = $this->getMain()->canApiHighLimits() ?
$botMax : $userMax;
186 $this->getResult()->addValue( 'limits', $this->getModuleName(), $limit );
191 // This is mostly to prevent parameter errors (and optimize SQL?)
192 if (!is_null($params['startid']) && !is_null($params['start']))
193 $this->dieUsage('start and startid cannot be used together', 'badparams');
195 if (!is_null($params['endid']) && !is_null($params['end']))
196 $this->dieUsage('end and endid cannot be used together', 'badparams');
198 if(!is_null($params['user']) && !is_null($params['excludeuser']))
199 $this->dieUsage('user and excludeuser cannot be used together', 'badparams');
201 // This code makes an assumption that sorting by rev_id and rev_timestamp produces
202 // the same result. This way users may request revisions starting at a given time,
203 // but to page through results use the rev_id returned after each page.
204 // Switching to rev_id removes the potential problem of having more than
205 // one row with the same timestamp for the same page.
206 // The order needs to be the same as start parameter to avoid SQL filesort.
208 if (is_null($params['startid']) && is_null($params['endid']))
209 $this->addWhereRange('rev_timestamp', $params['dir'],
210 $params['start'], $params['end']);
212 $this->addWhereRange('rev_id', $params['dir'],
213 $params['startid'], $params['endid']);
214 // One of start and end can be set
215 // If neither is set, this does nothing
216 $this->addWhereRange('rev_timestamp', $params['dir'],
217 $params['start'], $params['end'], false);
220 // must manually initialize unset limit
223 $this->validateLimit('limit', $limit, 1, $userMax, $botMax);
225 // There is only one ID, use it
226 $ids = array_keys($pageSet->getGoodTitles());
227 $this->addWhereFld('rev_page', reset($ids));
229 if(!is_null($params['user'])) {
230 $this->addWhereFld('rev_user_text', $params['user']);
231 } elseif (!is_null($params['excludeuser'])) {
232 $this->addWhere('rev_user_text != ' .
233 $db->addQuotes($params['excludeuser']));
235 if(!is_null($params['user']) ||
!is_null($params['excludeuser'])) {
236 // Paranoia: avoid brute force searches (bug 17342)
237 $this->addWhere($db->bitAnd('rev_deleted',Revision
::DELETED_USER
) . ' = 0');
240 elseif ($revCount > 0) {
241 $max = $this->getMain()->canApiHighLimits() ?
$botMax : $userMax;
242 $revs = $pageSet->getRevisionIDs();
243 if(self
::truncateArray($revs, $max))
244 $this->setWarning("Too many values supplied for parameter 'revids': the limit is $max");
246 // Get all revision IDs
247 $this->addWhereFld('rev_id', array_keys($revs));
249 if(!is_null($params['continue']))
250 $this->addWhere("rev_id >= '" . intval($params['continue']) . "'");
251 $this->addOption('ORDER BY', 'rev_id');
253 // assumption testing -- we should never get more then $revCount rows.
256 elseif ($pageCount > 0) {
257 $max = $this->getMain()->canApiHighLimits() ?
$botMax : $userMax;
258 $titles = $pageSet->getGoodTitles();
259 if(self
::truncateArray($titles, $max))
260 $this->setWarning("Too many values supplied for parameter 'titles': the limit is $max");
262 // When working in multi-page non-enumeration mode,
263 // limit to the latest revision only
264 $this->addWhere('page_id=rev_page');
265 $this->addWhere('page_latest=rev_id');
268 $this->addWhereFld('page_id', array_keys($titles));
269 // Every time someone relies on equality propagation, god kills a kitten :)
270 $this->addWhereFld('rev_page', array_keys($titles));
272 if(!is_null($params['continue']))
274 $cont = explode('|', $params['continue']);
275 if(count($cont) != 2)
276 $this->dieUsage("Invalid continue param. You should pass the original " .
277 "value returned by the previous query", "_badcontinue");
278 $pageid = intval($cont[0]);
279 $revid = intval($cont[1]);
280 $this->addWhere("rev_page > '$pageid' OR " .
281 "(rev_page = '$pageid' AND " .
282 "rev_id >= '$revid')");
284 $this->addOption('ORDER BY', 'rev_page, rev_id');
286 // assumption testing -- we should never get more then $pageCount rows.
289 ApiBase
:: dieDebug(__METHOD__
, 'param validation?');
291 $this->addOption('LIMIT', $limit +
1);
295 $res = $this->select(__METHOD__
);
297 while ($row = $db->fetchObject($res)) {
299 if (++
$count > $limit) {
300 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
302 ApiBase
:: dieDebug(__METHOD__
, 'Got more rows then expected'); // bug report
303 $this->setContinueEnumParameter('startid', intval($row->rev_id
));
308 $fit = $this->addPageSubItem($row->rev_page
, $this->extractRowInfo($row), 'rev');
312 $this->setContinueEnumParameter('startid', intval($row->rev_id
));
313 else if($revCount > 0)
314 $this->setContinueEnumParameter('continue', intval($row->rev_id
));
316 $this->setContinueEnumParameter('continue', intval($row->rev_page
) .
317 '|' . intval($row->rev_id
));
321 $db->freeResult($res);
324 private function extractRowInfo( $row ) {
325 $revision = new Revision( $row );
326 $title = $revision->getTitle();
329 if ($this->fld_ids
) {
330 $vals['revid'] = intval($revision->getId());
331 // $vals['oldid'] = intval($row->rev_text_id); // todo: should this be exposed?
332 if (!is_null($revision->getParentId()))
333 $vals['parentid'] = intval($revision->getParentId());
336 if ($this->fld_flags
&& $revision->isMinor())
339 if ($this->fld_user
) {
340 if ($revision->isDeleted(Revision
::DELETED_USER
)) {
341 $vals['userhidden'] = '';
343 $vals['user'] = $revision->getUserText();
344 if (!$revision->getUser())
349 if ($this->fld_timestamp
) {
350 $vals['timestamp'] = wfTimestamp(TS_ISO_8601
, $revision->getTimestamp());
353 if ($this->fld_size
&& !is_null($revision->getSize())) {
354 $vals['size'] = intval($revision->getSize());
357 if ($this->fld_comment
) {
358 if ($revision->isDeleted(Revision
::DELETED_COMMENT
)) {
359 $vals['commenthidden'] = '';
361 $comment = $revision->getComment();
362 if (strval($comment) !== '')
363 $vals['comment'] = $comment;
367 if ($this->fld_tags
&& $row->ts_tags
)
368 $vals['tags'] = $row->ts_tags
;
370 if(!is_null($this->token
))
372 $tokenFunctions = $this->getTokenFunctions();
373 foreach($this->token
as $t)
375 $val = call_user_func($tokenFunctions[$t], $title->getArticleID(), $title, $revision);
377 $this->setWarning("Action '$t' is not allowed for the current user");
379 $vals[$t . 'token'] = $val;
383 if ($this->fld_content
&& !$revision->isDeleted(Revision
::DELETED_TEXT
)) {
385 $text = $revision->getText();
386 # Expand templates after getting section content because
387 # template-added sections don't count and Parser::preprocess()
388 # will have less input
389 if ($this->section
!== false) {
390 $text = $wgParser->getSection( $text, $this->section
, false);
392 $this->dieUsage("There is no section {$this->section} in r".$revision->getId(), 'nosuchsection');
394 if ($this->generateXML
) {
395 $wgParser->startExternalParse( $title, new ParserOptions(), OT_PREPROCESS
);
396 $dom = $wgParser->preprocessToDom( $text );
397 if ( is_callable( array( $dom, 'saveXML' ) ) ) {
398 $xml = $dom->saveXML();
400 $xml = $dom->__toString();
402 $vals['parsetree'] = $xml;
405 if ($this->expandTemplates
) {
406 $text = $wgParser->preprocess( $text, $title, new ParserOptions() );
408 ApiResult
:: setContent($vals, $text);
409 } else if ($this->fld_content
) {
410 $vals['texthidden'] = '';
413 if (!is_null($this->diffto
)) {
414 global $wgAPIMaxUncachedDiffs;
415 static $n = 0; // Numer of uncached diffs we've had
416 if($n< $wgAPIMaxUncachedDiffs) {
417 $engine = new DifferenceEngine($title, $revision->getID(), $this->diffto
);
418 $difftext = $engine->getDiffBody();
419 $vals['diff']['from'] = $engine->getOldid();
420 $vals['diff']['to'] = $engine->getNewid();
421 ApiResult
::setContent($vals['diff'], $difftext);
422 if(!$engine->wasCacheHit())
425 $vals['diff']['notcached'] = '';
431 public function getAllowedParams() {
434 ApiBase
:: PARAM_ISMULTI
=> true,
435 ApiBase
:: PARAM_DFLT
=> 'ids|timestamp|flags|comment|user',
436 ApiBase
:: PARAM_TYPE
=> array (
448 ApiBase
:: PARAM_TYPE
=> 'limit',
449 ApiBase
:: PARAM_MIN
=> 1,
450 ApiBase
:: PARAM_MAX
=> ApiBase
:: LIMIT_BIG1
,
451 ApiBase
:: PARAM_MAX2
=> ApiBase
:: LIMIT_BIG2
454 ApiBase
:: PARAM_TYPE
=> 'integer'
457 ApiBase
:: PARAM_TYPE
=> 'integer'
460 ApiBase
:: PARAM_TYPE
=> 'timestamp'
463 ApiBase
:: PARAM_TYPE
=> 'timestamp'
466 ApiBase
:: PARAM_DFLT
=> 'older',
467 ApiBase
:: PARAM_TYPE
=> array (
473 ApiBase
:: PARAM_TYPE
=> 'user'
475 'excludeuser' => array(
476 ApiBase
:: PARAM_TYPE
=> 'user'
479 'expandtemplates' => false,
480 'generatexml' => false,
483 ApiBase
:: PARAM_TYPE
=> array_keys($this->getTokenFunctions()),
484 ApiBase
:: PARAM_ISMULTI
=> true
491 public function getParamDescription() {
493 'prop' => 'Which properties to get for each revision.',
494 'limit' => 'limit how many revisions will be returned (enum)',
495 'startid' => 'from which revision id to start enumeration (enum)',
496 'endid' => 'stop revision enumeration on this revid (enum)',
497 'start' => 'from which revision timestamp to start enumeration (enum)',
498 'end' => 'enumerate up to this timestamp (enum)',
499 'dir' => 'direction of enumeration - towards "newer" or "older" revisions (enum)',
500 'user' => 'only include revisions made by user',
501 'excludeuser' => 'exclude revisions made by user',
502 'tag' => 'only list revisions with this tag',
503 'expandtemplates' => 'expand templates in revision content',
504 'generatexml' => 'generate XML parse tree for revision content',
505 'section' => 'only retrieve the content of this section',
506 'token' => 'Which tokens to obtain for each revision',
507 'continue' => 'When more results are available, use this to continue',
508 'diffto' => array('Revision ID to diff each revision to.',
509 'Use "prev", "next" and "cur" for the previous, next and current revision respectively.'),
513 public function getDescription() {
515 'Get revision information.',
516 'This module may be used in several ways:',
517 ' 1) Get data about a set of pages (last revision), by setting titles or pageids parameter.',
518 ' 2) Get revisions for one given page, by using titles/pageids with start/end/limit params.',
519 ' 3) Get data about a set of revisions by setting their IDs with revids parameter.',
520 'All parameters marked as (enum) may only be used with a single page (#2).'
524 protected function getExamples() {
526 'Get data with content for the last revision of titles "API" and "Main Page":',
527 ' api.php?action=query&prop=revisions&titles=API|Main%20Page&rvprop=timestamp|user|comment|content',
528 'Get last 5 revisions of the "Main Page":',
529 ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment',
530 'Get first 5 revisions of the "Main Page":',
531 ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer',
532 'Get first 5 revisions of the "Main Page" made after 2006-05-01:',
533 ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer&rvstart=20060501000000',
534 'Get first 5 revisions of the "Main Page" that were not made made by anonymous user "127.0.0.1"',
535 ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvexcludeuser=127.0.0.1',
536 'Get first 5 revisions of the "Main Page" that were made by the user "MediaWiki default"',
537 ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvuser=MediaWiki%20default',
541 public function getVersion() {
542 return __CLASS__
. ': $Id$';