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ApiStashEdit.php
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1 <?php
24 
38 class ApiStashEdit extends ApiBase {
39  const ERROR_NONE = 'stashed';
40  const ERROR_PARSE = 'error_parse';
41  const ERROR_CACHE = 'error_cache';
42  const ERROR_UNCACHEABLE = 'uncacheable';
43  const ERROR_BUSY = 'busy';
44 
46  const MAX_CACHE_TTL = 300; // 5 minutes
47  const MAX_SIGNATURE_TTL = 60;
48 
49  public function execute() {
50  $user = $this->getUser();
51  $params = $this->extractRequestParams();
52 
53  if ( $user->isBot() ) { // sanity
54  $this->dieWithError( 'apierror-botsnotsupported' );
55  }
56 
58  $page = $this->getTitleOrPageId( $params );
59  $title = $page->getTitle();
60 
61  if ( !ContentHandler::getForModelID( $params['contentmodel'] )
62  ->isSupportedFormat( $params['contentformat'] )
63  ) {
64  $this->dieWithError(
65  [ 'apierror-badformat-generic', $params['contentformat'], $params['contentmodel'] ],
66  'badmodelformat'
67  );
68  }
69 
70  $this->requireOnlyOneParameter( $params, 'stashedtexthash', 'text' );
71 
72  $text = null;
73  $textHash = null;
74  if ( $params['stashedtexthash'] !== null ) {
75  // Load from cache since the client indicates the text is the same as last stash
76  $textHash = $params['stashedtexthash'];
77  if ( !preg_match( '/^[0-9a-f]{40}$/', $textHash ) ) {
78  $this->dieWithError( 'apierror-stashedit-missingtext', 'missingtext' );
79  }
80  $textKey = $cache->makeKey( 'stashedit', 'text', $textHash );
81  $text = $cache->get( $textKey );
82  if ( !is_string( $text ) ) {
83  $this->dieWithError( 'apierror-stashedit-missingtext', 'missingtext' );
84  }
85  } else {
86  // 'text' was passed. Trim and fix newlines so the key SHA1's
87  // match (see WebRequest::getText())
88  $text = rtrim( str_replace( "\r\n", "\n", $params['text'] ) );
89  $textHash = sha1( $text );
90  }
91 
92  $textContent = ContentHandler::makeContent(
93  $text, $title, $params['contentmodel'], $params['contentformat'] );
94 
95  $page = WikiPage::factory( $title );
96  if ( $page->exists() ) {
97  // Page exists: get the merged content with the proposed change
98  $baseRev = Revision::newFromPageId( $page->getId(), $params['baserevid'] );
99  if ( !$baseRev ) {
100  $this->dieWithError( [ 'apierror-nosuchrevid', $params['baserevid'] ] );
101  }
102  $currentRev = $page->getRevision();
103  if ( !$currentRev ) {
104  $this->dieWithError( [ 'apierror-missingrev-pageid', $page->getId() ], 'missingrev' );
105  }
106  // Merge in the new version of the section to get the proposed version
107  $editContent = $page->replaceSectionAtRev(
108  $params['section'],
109  $textContent,
110  $params['sectiontitle'],
111  $baseRev->getId()
112  );
113  if ( !$editContent ) {
114  $this->dieWithError( 'apierror-sectionreplacefailed', 'replacefailed' );
115  }
116  if ( $currentRev->getId() == $baseRev->getId() ) {
117  // Base revision was still the latest; nothing to merge
118  $content = $editContent;
119  } else {
120  // Merge the edit into the current version
121  $baseContent = $baseRev->getContent();
122  $currentContent = $currentRev->getContent();
123  if ( !$baseContent || !$currentContent ) {
124  $this->dieWithError( [ 'apierror-missingcontent-pageid', $page->getId() ], 'missingrev' );
125  }
126  $handler = ContentHandler::getForModelID( $baseContent->getModel() );
127  $content = $handler->merge3( $baseContent, $editContent, $currentContent );
128  }
129  } else {
130  // New pages: use the user-provided content model
131  $content = $textContent;
132  }
133 
134  if ( !$content ) { // merge3() failed
135  $this->getResult()->addValue( null,
136  $this->getModuleName(), [ 'status' => 'editconflict' ] );
137  return;
138  }
139 
140  // The user will abort the AJAX request by pressing "save", so ignore that
141  ignore_user_abort( true );
142 
143  if ( $user->pingLimiter( 'stashedit' ) ) {
144  $status = 'ratelimited';
145  } else {
146  $status = self::parseAndStash( $page, $content, $user, $params['summary'] );
147  $textKey = $cache->makeKey( 'stashedit', 'text', $textHash );
148  $cache->set( $textKey, $text, self::MAX_CACHE_TTL );
149  }
150 
151  $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
152  $stats->increment( "editstash.cache_stores.$status" );
153 
154  $ret = [ 'status' => $status ];
155  // If we were rate-limited, we still return the pre-existing valid hash if one was passed
156  if ( $status !== 'ratelimited' || $params['stashedtexthash'] !== null ) {
157  $ret['texthash'] = $textHash;
158  }
159 
160  $this->getResult()->addValue( null, $this->getModuleName(), $ret );
161  }
162 
171  public static function parseAndStash( WikiPage $page, Content $content, User $user, $summary ) {
173  $logger = LoggerFactory::getInstance( 'StashEdit' );
174 
175  $title = $page->getTitle();
176  $key = self::getStashKey( $title, self::getContentHash( $content ), $user );
177  $fname = __METHOD__;
178 
179  // Use the master DB to allow for fast blocking locks on the "save path" where this
180  // value might actually be used to complete a page edit. If the edit submission request
181  // happens before this edit stash requests finishes, then the submission will block until
182  // the stash request finishes parsing. For the lock acquisition below, there is not much
183  // need to duplicate parsing of the same content/user/summary bundle, so try to avoid
184  // blocking at all here.
185  $dbw = wfGetDB( DB_MASTER );
186  if ( !$dbw->lock( $key, $fname, 0 ) ) {
187  // De-duplicate requests on the same key
188  return self::ERROR_BUSY;
189  }
191  $unlocker = new ScopedCallback( function () use ( $dbw, $key, $fname ) {
192  $dbw->unlock( $key, $fname );
193  } );
194 
195  $cutoffTime = time() - self::PRESUME_FRESH_TTL_SEC;
196 
197  // Reuse any freshly build matching edit stash cache
198  $editInfo = $cache->get( $key );
199  if ( $editInfo && wfTimestamp( TS_UNIX, $editInfo->timestamp ) >= $cutoffTime ) {
200  $alreadyCached = true;
201  } else {
202  $format = $content->getDefaultFormat();
203  $editInfo = $page->prepareContentForEdit( $content, null, $user, $format, false );
204  $alreadyCached = false;
205  }
206 
207  if ( $editInfo && $editInfo->output ) {
208  // Let extensions add ParserOutput metadata or warm other caches
209  Hooks::run( 'ParserOutputStashForEdit',
210  [ $page, $content, $editInfo->output, $summary, $user ] );
211 
212  $titleStr = (string)$title;
213  if ( $alreadyCached ) {
214  $logger->debug( "Already cached parser output for key '{cachekey}' ('{title}').",
215  [ 'cachekey' => $key, 'title' => $titleStr ] );
216  return self::ERROR_NONE;
217  }
218 
219  list( $stashInfo, $ttl, $code ) = self::buildStashValue(
220  $editInfo->pstContent,
221  $editInfo->output,
222  $editInfo->timestamp,
223  $user
224  );
225 
226  if ( $stashInfo ) {
227  $ok = $cache->set( $key, $stashInfo, $ttl );
228  if ( $ok ) {
229  $logger->debug( "Cached parser output for key '{cachekey}' ('{title}').",
230  [ 'cachekey' => $key, 'title' => $titleStr ] );
231  return self::ERROR_NONE;
232  } else {
233  $logger->error( "Failed to cache parser output for key '{cachekey}' ('{title}').",
234  [ 'cachekey' => $key, 'title' => $titleStr ] );
235  return self::ERROR_CACHE;
236  }
237  } else {
238  // @todo Doesn't seem reachable, see @todo in buildStashValue
239  $logger->info( "Uncacheable parser output for key '{cachekey}' ('{title}') [{code}].",
240  [ 'cachekey' => $key, 'title' => $titleStr, 'code' => $code ] );
241  return self::ERROR_UNCACHEABLE;
242  }
243  }
244 
245  return self::ERROR_PARSE;
246  }
247 
265  public static function checkCache( Title $title, Content $content, User $user ) {
266  if ( $user->isBot() ) {
267  return false; // bots never stash - don't pollute stats
268  }
269 
271  $logger = LoggerFactory::getInstance( 'StashEdit' );
272  $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
273 
274  $key = self::getStashKey( $title, self::getContentHash( $content ), $user );
275  $editInfo = $cache->get( $key );
276  if ( !is_object( $editInfo ) ) {
277  $start = microtime( true );
278  // We ignore user aborts and keep parsing. Block on any prior parsing
279  // so as to use its results and make use of the time spent parsing.
280  // Skip this logic if there no master connection in case this method
281  // is called on an HTTP GET request for some reason.
282  $lb = MediaWikiServices::getInstance()->getDBLoadBalancer();
283  $dbw = $lb->getAnyOpenConnection( $lb->getWriterIndex() );
284  if ( $dbw && $dbw->lock( $key, __METHOD__, 30 ) ) {
285  $editInfo = $cache->get( $key );
286  $dbw->unlock( $key, __METHOD__ );
287  }
288 
289  $timeMs = 1000 * max( 0, microtime( true ) - $start );
290  $stats->timing( 'editstash.lock_wait_time', $timeMs );
291  }
292 
293  if ( !is_object( $editInfo ) || !$editInfo->output ) {
294  $stats->increment( 'editstash.cache_misses.no_stash' );
295  $logger->debug( "Empty cache for key '$key' ('$title'); user '{$user->getName()}'." );
296  return false;
297  }
298 
299  $age = time() - wfTimestamp( TS_UNIX, $editInfo->output->getCacheTime() );
300  if ( $age <= self::PRESUME_FRESH_TTL_SEC ) {
301  // Assume nothing changed in this time
302  $stats->increment( 'editstash.cache_hits.presumed_fresh' );
303  $logger->debug( "Timestamp-based cache hit for key '$key' (age: $age sec)." );
304  } elseif ( isset( $editInfo->edits ) && $editInfo->edits === $user->getEditCount() ) {
305  // Logged-in user made no local upload/template edits in the meantime
306  $stats->increment( 'editstash.cache_hits.presumed_fresh' );
307  $logger->debug( "Edit count based cache hit for key '$key' (age: $age sec)." );
308  } elseif ( $user->isAnon()
309  && self::lastEditTime( $user ) < $editInfo->output->getCacheTime()
310  ) {
311  // Logged-out user made no local upload/template edits in the meantime
312  $stats->increment( 'editstash.cache_hits.presumed_fresh' );
313  $logger->debug( "Edit check based cache hit for key '$key' (age: $age sec)." );
314  } else {
315  // User may have changed included content
316  $editInfo = false;
317  }
318 
319  if ( !$editInfo ) {
320  $stats->increment( 'editstash.cache_misses.proven_stale' );
321  $logger->info( "Stale cache for key '$key'; old key with outside edits. (age: $age sec)" );
322  } elseif ( $editInfo->output->getFlag( 'vary-revision' ) ) {
323  // This can be used for the initial parse, e.g. for filters or doEditContent(),
324  // but a second parse will be triggered in doEditUpdates(). This is not optimal.
325  $logger->info( "Cache for key '$key' ('$title') has vary_revision." );
326  } elseif ( $editInfo->output->getFlag( 'vary-revision-id' ) ) {
327  // Similar to the above if we didn't guess the ID correctly.
328  $logger->info( "Cache for key '$key' ('$title') has vary_revision_id." );
329  }
330 
331  return $editInfo;
332  }
333 
338  private static function lastEditTime( User $user ) {
339  $db = wfGetDB( DB_REPLICA );
340  $actorQuery = ActorMigration::newMigration()->getWhere( $db, 'rc_user', $user, false );
341  $time = $db->selectField(
342  [ 'recentchanges' ] + $actorQuery['tables'],
343  'MAX(rc_timestamp)',
344  [ $actorQuery['conds'] ],
345  __METHOD__,
346  [],
347  $actorQuery['joins']
348  );
349 
350  return wfTimestampOrNull( TS_MW, $time );
351  }
352 
359  private static function getContentHash( Content $content ) {
360  return sha1( implode( "\n", [
361  $content->getModel(),
362  $content->getDefaultFormat(),
363  $content->serialize( $content->getDefaultFormat() )
364  ] ) );
365  }
366 
379  private static function getStashKey( Title $title, $contentHash, User $user ) {
380  return ObjectCache::getLocalClusterInstance()->makeKey(
381  'prepared-edit',
382  md5( $title->getPrefixedDBkey() ),
383  // Account for the edit model/text
384  $contentHash,
385  // Account for user name related variables like signatures
386  md5( $user->getId() . "\n" . $user->getName() )
387  );
388  }
389 
401  private static function buildStashValue(
402  Content $pstContent, ParserOutput $parserOutput, $timestamp, User $user
403  ) {
404  // If an item is renewed, mind the cache TTL determined by config and parser functions.
405  // Put an upper limit on the TTL for sanity to avoid extreme template/file staleness.
406  $since = time() - wfTimestamp( TS_UNIX, $parserOutput->getCacheTime() );
407  $ttl = min( $parserOutput->getCacheExpiry() - $since, self::MAX_CACHE_TTL );
408 
409  // Avoid extremely stale user signature timestamps (T84843)
410  if ( $parserOutput->getFlag( 'user-signature' ) ) {
411  $ttl = min( $ttl, self::MAX_SIGNATURE_TTL );
412  }
413 
414  if ( $ttl <= 0 ) {
415  // @todo It doesn't seem like this can occur, because it would mean an entry older than
416  // getCacheExpiry() seconds, which is much longer than PRESUME_FRESH_TTL_SEC, and
417  // anything older than PRESUME_FRESH_TTL_SEC will have been thrown out already.
418  return [ null, 0, 'no_ttl' ];
419  }
420 
421  // Only store what is actually needed
422  $stashInfo = (object)[
423  'pstContent' => $pstContent,
424  'output' => $parserOutput,
425  'timestamp' => $timestamp,
426  'edits' => $user->getEditCount()
427  ];
428 
429  return [ $stashInfo, $ttl, 'ok' ];
430  }
431 
432  public function getAllowedParams() {
433  return [
434  'title' => [
435  ApiBase::PARAM_TYPE => 'string',
437  ],
438  'section' => [
439  ApiBase::PARAM_TYPE => 'string',
440  ],
441  'sectiontitle' => [
442  ApiBase::PARAM_TYPE => 'string'
443  ],
444  'text' => [
445  ApiBase::PARAM_TYPE => 'text',
446  ApiBase::PARAM_DFLT => null
447  ],
448  'stashedtexthash' => [
449  ApiBase::PARAM_TYPE => 'string',
450  ApiBase::PARAM_DFLT => null
451  ],
452  'summary' => [
453  ApiBase::PARAM_TYPE => 'string',
454  ],
455  'contentmodel' => [
458  ],
459  'contentformat' => [
462  ],
463  'baserevid' => [
464  ApiBase::PARAM_TYPE => 'integer',
466  ]
467  ];
468  }
469 
470  public function needsToken() {
471  return 'csrf';
472  }
473 
474  public function mustBePosted() {
475  return true;
476  }
477 
478  public function isWriteMode() {
479  return true;
480  }
481 
482  public function isInternal() {
483  return true;
484  }
485 }
static factory(Title $title)
Create a WikiPage object of the appropriate class for the given title.
Definition: WikiPage.php:127
const MAX_SIGNATURE_TTL
const PARAM_TYPE
(string|string[]) Either an array of allowed value strings, or a string type as described below...
Definition: ApiBase.php:87
requireOnlyOneParameter( $params, $required)
Die if none or more than one of a certain set of parameters is set and not false. ...
Definition: ApiBase.php:863
static getStashKey(Title $title, $contentHash, User $user)
Get the temporary prepared edit stash key for a user.
deferred txt A few of the database updates required by various functions here can be deferred until after the result page is displayed to the user For updating the view updating the linked to tables after a etc PHP does not yet have any way to tell the server to actually return and disconnect while still running these but it might have such a feature in the future We handle these by creating a deferred update object and putting those objects on a global list
Definition: deferred.txt:11
getResult()
Get the result object.
Definition: ApiBase.php:621
static checkCache(Title $title, Content $content, User $user)
Check that a prepared edit is in cache and still up-to-date.
static parseAndStash(WikiPage $page, Content $content, User $user, $summary)
static getAllContentFormats()
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses & $ret
Definition: hooks.txt:1997
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
const PARAM_DFLT
(null|boolean|integer|string) Default value of the parameter.
Definition: ApiBase.php:48
static getContentModels()
globals will be eliminated from MediaWiki replaced by an application object which would be passed to constructors Whether that would be an convenient solution remains to be but certainly PHP makes such object oriented programming models easier than they were in previous versions For the time being MediaWiki programmers will have to work in an environment with some global context At the time of globals were initialised on startup by MediaWiki of these were configuration which are documented in DefaultSettings php There is no comprehensive documentation for the remaining however some of the most important ones are listed below They are typically initialised either in index php or in Setup php $wgTitle Title object created from the request URL $wgOut OutputPage object for HTTP response $wgUser User object for the user associated with the current request $wgLang Language object selected by user preferences $wgContLang Language object associated with the wiki being viewed $wgParser Parser object Parser extensions register their hooks here $wgRequest WebRequest object
Definition: globals.txt:25
Status::newGood()` to allow deletion, and then `return false` from the hook function. Ensure you consume the 'ChangeTagAfterDelete' hook to carry out custom deletion actions. $tag:name of the tag $user:user initiating the action & $status:Status object. See above. 'ChangeTagsListActive':Allows you to nominate which of the tags your extension uses are in active use. & $tags:list of all active tags. Append to this array. 'ChangeTagsAfterUpdateTags':Called after tags have been updated with the ChangeTags::updateTags function. Params:$addedTags:tags effectively added in the update $removedTags:tags effectively removed in the update $prevTags:tags that were present prior to the update $rc_id:recentchanges table id $rev_id:revision table id $log_id:logging table id $params:tag params $rc:RecentChange being tagged when the tagging accompanies the action, or null $user:User who performed the tagging when the tagging is subsequent to the action, or null 'ChangeTagsAllowedAdd':Called when checking if a user can add tags to a change. & $allowedTags:List of all the tags the user is allowed to add. Any tags the user wants to add( $addTags) that are not in this array will cause it to fail. You may add or remove tags to this array as required. $addTags:List of tags user intends to add. $user:User who is adding the tags. 'ChangeUserGroups':Called before user groups are changed. $performer:The User who will perform the change $user:The User whose groups will be changed & $add:The groups that will be added & $remove:The groups that will be removed 'Collation::factory':Called if $wgCategoryCollation is an unknown collation. $collationName:Name of the collation in question & $collationObject:Null. Replace with a subclass of the Collation class that implements the collation given in $collationName. 'ConfirmEmailComplete':Called after a user 's email has been confirmed successfully. $user:user(object) whose email is being confirmed 'ContentAlterParserOutput':Modify parser output for a given content object. Called by Content::getParserOutput after parsing has finished. Can be used for changes that depend on the result of the parsing but have to be done before LinksUpdate is called(such as adding tracking categories based on the rendered HTML). $content:The Content to render $title:Title of the page, as context $parserOutput:ParserOutput to manipulate 'ContentGetParserOutput':Customize parser output for a given content object, called by AbstractContent::getParserOutput. May be used to override the normal model-specific rendering of page content. $content:The Content to render $title:Title of the page, as context $revId:The revision ID, as context $options:ParserOptions for rendering. To avoid confusing the parser cache, the output can only depend on parameters provided to this hook function, not on global state. $generateHtml:boolean, indicating whether full HTML should be generated. If false, generation of HTML may be skipped, but other information should still be present in the ParserOutput object. & $output:ParserOutput, to manipulate or replace 'ContentHandlerDefaultModelFor':Called when the default content model is determined for a given title. May be used to assign a different model for that title. $title:the Title in question & $model:the model name. Use with CONTENT_MODEL_XXX constants. 'ContentHandlerForModelID':Called when a ContentHandler is requested for a given content model name, but no entry for that model exists in $wgContentHandlers. Note:if your extension implements additional models via this hook, please use GetContentModels hook to make them known to core. $modeName:the requested content model name & $handler:set this to a ContentHandler object, if desired. 'ContentModelCanBeUsedOn':Called to determine whether that content model can be used on a given page. This is especially useful to prevent some content models to be used in some special location. $contentModel:ID of the content model in question $title:the Title in question. & $ok:Output parameter, whether it is OK to use $contentModel on $title. Handler functions that modify $ok should generally return false to prevent further hooks from further modifying $ok. 'ContribsPager::getQueryInfo':Before the contributions query is about to run & $pager:Pager object for contributions & $queryInfo:The query for the contribs Pager 'ContribsPager::reallyDoQuery':Called before really executing the query for My Contributions & $data:an array of results of all contribs queries $pager:The ContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'ContributionsLineEnding':Called before a contributions HTML line is finished $page:SpecialPage object for contributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'ContributionsToolLinks':Change tool links above Special:Contributions $id:User identifier $title:User page title & $tools:Array of tool links $specialPage:SpecialPage instance for context and services. Can be either SpecialContributions or DeletedContributionsPage. Extensions should type hint against a generic SpecialPage though. 'ConvertContent':Called by AbstractContent::convert when a conversion to another content model is requested. Handler functions that modify $result should generally return false to disable further attempts at conversion. $content:The Content object to be converted. $toModel:The ID of the content model to convert to. $lossy:boolean indicating whether lossy conversion is allowed. & $result:Output parameter, in case the handler function wants to provide a converted Content object. Note that $result->getContentModel() must return $toModel. 'ContentSecurityPolicyDefaultSource':Modify the allowed CSP load sources. This affects all directives except for the script directive. If you want to add a script source, see ContentSecurityPolicyScriptSource hook. & $defaultSrc:Array of Content-Security-Policy allowed sources $policyConfig:Current configuration for the Content-Security-Policy header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyDirectives':Modify the content security policy directives. Use this only if ContentSecurityPolicyDefaultSource and ContentSecurityPolicyScriptSource do not meet your needs. & $directives:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyScriptSource':Modify the allowed CSP script sources. Note that you also have to use ContentSecurityPolicyDefaultSource if you want non-script sources to be loaded from whatever you add. & $scriptSrc:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'CustomEditor':When invoking the page editor Return true to allow the normal editor to be used, or false if implementing a custom editor, e.g. for a special namespace, etc. $article:Article being edited $user:User performing the edit 'DatabaseOraclePostInit':Called after initialising an Oracle database $db:the DatabaseOracle object 'DeletedContribsPager::reallyDoQuery':Called before really executing the query for Special:DeletedContributions Similar to ContribsPager::reallyDoQuery & $data:an array of results of all contribs queries $pager:The DeletedContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'DeletedContributionsLineEnding':Called before a DeletedContributions HTML line is finished. Similar to ContributionsLineEnding $page:SpecialPage object for DeletedContributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'DeleteUnknownPreferences':Called by the cleanupPreferences.php maintenance script to build a WHERE clause with which to delete preferences that are not known about. This hook is used by extensions that have dynamically-named preferences that should not be deleted in the usual cleanup process. For example, the Gadgets extension creates preferences prefixed with 'gadget-', and so anything with that prefix is excluded from the deletion. &where:An array that will be passed as the $cond parameter to IDatabase::select() to determine what will be deleted from the user_properties table. $db:The IDatabase object, useful for accessing $db->buildLike() etc. 'DifferenceEngineAfterLoadNewText':called in DifferenceEngine::loadNewText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before returning true from this function. $differenceEngine:DifferenceEngine object 'DifferenceEngineLoadTextAfterNewContentIsLoaded':called in DifferenceEngine::loadText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before checking if the variable 's value is null. This hook can be used to inject content into said class member variable. $differenceEngine:DifferenceEngine object 'DifferenceEngineMarkPatrolledLink':Allows extensions to change the "mark as patrolled" link which is shown both on the diff header as well as on the bottom of a page, usually wrapped in a span element which has class="patrollink". $differenceEngine:DifferenceEngine object & $markAsPatrolledLink:The "mark as patrolled" link HTML(string) $rcid:Recent change ID(rc_id) for this change(int) 'DifferenceEngineMarkPatrolledRCID':Allows extensions to possibly change the rcid parameter. For example the rcid might be set to zero due to the user being the same as the performer of the change but an extension might still want to show it under certain conditions. & $rcid:rc_id(int) of the change or 0 $differenceEngine:DifferenceEngine object $change:RecentChange object $user:User object representing the current user 'DifferenceEngineNewHeader':Allows extensions to change the $newHeader variable, which contains information about the new revision, such as the revision 's author, whether the revision was marked as a minor edit or not, etc. $differenceEngine:DifferenceEngine object & $newHeader:The string containing the various #mw-diff-otitle[1-5] divs, which include things like revision author info, revision comment, RevisionDelete link and more $formattedRevisionTools:Array containing revision tools, some of which may have been injected with the DiffRevisionTools hook $nextlink:String containing the link to the next revision(if any) $status
Definition: hooks.txt:1277
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
const PARAM_REQUIRED
(boolean) Is the parameter required?
Definition: ApiBase.php:111
This code would result in ircNotify being run twice when an article is and once for brion Hooks can return three possible true was required This is the default since MediaWiki *some string
Definition: hooks.txt:175
dieWithError( $msg, $code=null, $data=null, $httpCode=null)
Abort execution with an error.
Definition: ApiBase.php:1931
extractRequestParams( $options=[])
Using getAllowedParams(), this function makes an array of the values provided by the user...
Definition: ApiBase.php:732
static newFromPageId( $pageId, $revId=0, $flags=0)
Load either the current, or a specified, revision that&#39;s attached to a given page ID...
Definition: Revision.php:157
static getLocalClusterInstance()
Get the main cluster-local cache object.
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency MediaWikiServices
Definition: injection.txt:23
wfTimestampOrNull( $outputtype=TS_UNIX, $ts=null)
Return a formatted timestamp, or null if input is null.
see documentation in includes Linker php for Linker::makeImageLink & $time
Definition: hooks.txt:1814
const MAX_CACHE_TTL
const DB_MASTER
Definition: defines.php:26
getName()
Get the user name, or the IP of an anonymous user.
Definition: User.php:2462
The User object encapsulates all of the user-specific settings (user_id, name, rights, email address, options, last login time).
Definition: User.php:47
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses just before the function returns a value If you return true
Definition: hooks.txt:1997
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
getCacheExpiry()
Returns the number of seconds after which this object should expire.
Definition: CacheTime.php:129
static newMigration()
Static constructor.
static getForModelID( $modelId)
Returns the ContentHandler singleton for the given model ID.
const ERROR_BUSY
const ERROR_NONE
isAnon()
Get whether the user is anonymous.
Definition: User.php:3801
getCacheTime()
Definition: CacheTime.php:60
$cache
Definition: mcc.php:33
$params
getTitle()
Get the title object of the article.
Definition: WikiPage.php:276
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:936
const ERROR_PARSE
getModuleName()
Get the name of the module being executed by this instance.
Definition: ApiBase.php:501
const ERROR_CACHE
isBot()
Definition: User.php:3809
static lastEditTime(User $user)
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that probably a stub it is not rendered in wiki pages or galleries in category pages allow injecting custom HTML after the section Any uses of the hook need to handle escaping see BaseTemplate::getToolbox and BaseTemplate::makeListItem for details on the format of individual items inside of this array or by returning and letting standard HTTP rendering take place modifiable or by returning false and taking over the output modifiable & $code
Definition: hooks.txt:785
if(defined( 'MW_SETUP_CALLBACK')) $fname
Customization point after all loading (constants, functions, classes, DefaultSettings, LocalSettings).
Definition: Setup.php:121
getTitleOrPageId( $params, $load=false)
Get a WikiPage object from a title or pageid param, if possible.
Definition: ApiBase.php:1004
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
getId()
Get the user&#39;s ID.
Definition: User.php:2437
const ERROR_UNCACHEABLE
getEditCount()
Get the user&#39;s edit count.
Definition: User.php:3692
static buildStashValue(Content $pstContent, ParserOutput $parserOutput, $timestamp, User $user)
Build a value to store in memcached based on the PST content and parser output.
MediaWiki Logger LoggerFactory implements a PSR [0] compatible message logging system Named Psr Log LoggerInterface instances can be obtained from the MediaWiki Logger LoggerFactory::getInstance() static method. MediaWiki\Logger\LoggerFactory expects a class implementing the MediaWiki\Logger\Spi interface to act as a factory for new Psr\Log\LoggerInterface instances. The "Spi" in MediaWiki\Logger\Spi stands for "service provider interface". An SPI is an API intended to be implemented or extended by a third party. This software design pattern is intended to enable framework extension and replaceable components. It is specifically used in the MediaWiki\Logger\LoggerFactory service to allow alternate PSR-3 logging implementations to be easily integrated with MediaWiki. The service provider interface allows the backend logging library to be implemented in multiple ways. The $wgMWLoggerDefaultSpi global provides the classname of the default MediaWiki\Logger\Spi implementation to be loaded at runtime. This can either be the name of a class implementing the MediaWiki\Logger\Spi with a zero argument const ructor or a callable that will return an MediaWiki\Logger\Spi instance. Alternately the MediaWiki\Logger\LoggerFactory MediaWiki Logger LoggerFactory
Definition: logger.txt:5
This abstract class implements many basic API functions, and is the base of all API classes...
Definition: ApiBase.php:37
const DB_REPLICA
Definition: defines.php:25
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that probably a stub it is not rendered in wiki pages or galleries in category pages allow injecting custom HTML after the section Any uses of the hook need to handle escaping see BaseTemplate::getToolbox and BaseTemplate::makeListItem for details on the format of individual items inside of this array or by returning and letting standard HTTP rendering take place modifiable or by returning false and taking over the output modifiable modifiable after all normalizations have been except for the $wgMaxImageArea check set to true or false to override the $wgMaxImageArea check result gives extension the possibility to transform it themselves $handler
Definition: hooks.txt:785
getModel()
Returns the ID of the content model used by this Content object.
getFlag( $flag)
static makeContent( $text, Title $title=null, $modelId=null, $format=null)
Convenience function for creating a Content object from a given textual representation.
$content
Definition: pageupdater.txt:72
prepareContentForEdit(Content $content, $revision=null, User $user=null, $serialFormat=null, $useCache=true)
Prepare content which is about to be saved.
Definition: WikiPage.php:1951
getDefaultFormat()
Convenience method that returns the default serialization format for the content model that this Cont...
return true to allow those checks to and false if checking is done & $user
Definition: hooks.txt:1487
const PRESUME_FRESH_TTL_SEC
static run( $event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:200
getPrefixedDBkey()
Get the prefixed database key form.
Definition: Title.php:1682
serialize( $format=null)
Convenience method for serializing this Content object.
static getContentHash(Content $content)
Get hash of the content, factoring in model/format.