MediaWiki  1.33.0
Go to the documentation of this file.
1 <?php
34  function __construct( $name = 'DoubleRedirects' ) {
35  parent::__construct( $name );
36  }
38  public function isExpensive() {
39  return true;
40  }
42  function isSyndicated() {
43  return false;
44  }
46  function sortDescending() {
47  return false;
48  }
50  function getPageHeader() {
51  return $this->msg( 'doubleredirectstext' )->parseAsBlock();
52  }
54  function reallyGetQueryInfo( $namespace = null, $title = null ) {
55  $limitToTitle = !( $namespace === null && $title === null );
56  $dbr = wfGetDB( DB_REPLICA );
57  $retval = [
58  'tables' => [
59  'ra' => 'redirect',
60  'rb' => 'redirect',
61  'pa' => 'page',
62  'pb' => 'page'
63  ],
64  'fields' => [
65  'namespace' => 'pa.page_namespace',
66  'title' => 'pa.page_title',
67  'value' => 'pa.page_title',
69  'b_namespace' => 'pb.page_namespace',
70  'b_title' => 'pb.page_title',
72  // Select fields from redirect instead of page. Because there may
73  // not actually be a page table row for this target (e.g. for interwiki redirects)
74  'c_namespace' => 'rb.rd_namespace',
75  'c_title' => 'rb.rd_title',
76  'c_fragment' => 'rb.rd_fragment',
77  'c_interwiki' => 'rb.rd_interwiki',
78  ],
79  'conds' => [
80  'ra.rd_from = pa.page_id',
82  // Filter out redirects where the target goes interwiki (T42353).
83  // This isn't an optimization, it is required for correct results,
84  // otherwise a non-double redirect like Bar -> w:Foo will show up
85  // like "Bar -> Foo -> w:Foo".
87  // Need to check both NULL and "" for some reason,
88  // apparently either can be stored for non-iw entries.
89  'ra.rd_interwiki IS NULL OR ra.rd_interwiki = ' . $dbr->addQuotes( '' ),
91  'pb.page_namespace = ra.rd_namespace',
92  'pb.page_title = ra.rd_title',
94  'rb.rd_from = pb.page_id',
95  ]
96  ];
98  if ( $limitToTitle ) {
99  $retval['conds']['pa.page_namespace'] = $namespace;
100  $retval['conds']['pa.page_title'] = $title;
101  }
103  return $retval;
104  }
106  public function getQueryInfo() {
107  return $this->reallyGetQueryInfo();
108  }
110  function getOrderFields() {
111  return [ 'ra.rd_namespace', 'ra.rd_title' ];
112  }
119  function formatResult( $skin, $result ) {
120  // If no Title B or C is in the query, it means this came from
121  // querycache (which only saves the 3 columns for title A).
122  // That does save the bulk of the query cost, but now we need to
123  // get a little more detail about each individual entry quickly
124  // using the filter of reallyGetQueryInfo.
125  $deep = false;
126  if ( $result ) {
127  if ( isset( $result->b_namespace ) ) {
128  $deep = $result;
129  } else {
130  $dbr = wfGetDB( DB_REPLICA );
131  $qi = $this->reallyGetQueryInfo(
132  $result->namespace,
133  $result->title
134  );
135  $res = $dbr->select(
136  $qi['tables'],
137  $qi['fields'],
138  $qi['conds'],
139  __METHOD__
140  );
142  if ( $res ) {
143  $deep = $dbr->fetchObject( $res ) ?: false;
144  }
145  }
146  }
148  $titleA = Title::makeTitle( $result->namespace, $result->title );
150  $linkRenderer = $this->getLinkRenderer();
151  if ( !$deep ) {
152  return '<del>' . $linkRenderer->makeLink( $titleA, null, [], [ 'redirect' => 'no' ] ) . '</del>';
153  }
155  // if the page is editable, add an edit link
156  if (
157  // check user permissions
158  $this->getUser()->isAllowed( 'edit' ) &&
159  // check, if the content model is editable through action=edit
160  ContentHandler::getForTitle( $titleA )->supportsDirectEditing()
161  ) {
162  $edit = $linkRenderer->makeKnownLink(
163  $titleA,
164  $this->msg( 'parentheses', $this->msg( 'editlink' )->text() )->text(),
165  [],
166  [ 'action' => 'edit' ]
167  );
168  } else {
169  $edit = '';
170  }
172  $linkA = $linkRenderer->makeKnownLink(
173  $titleA,
174  null,
175  [],
176  [ 'redirect' => 'no' ]
177  );
179  $titleB = Title::makeTitle( $deep->b_namespace, $deep->b_title );
180  $linkB = $linkRenderer->makeKnownLink(
181  $titleB,
182  null,
183  [],
184  [ 'redirect' => 'no' ]
185  );
187  $titleC = Title::makeTitle(
188  $deep->c_namespace,
189  $deep->c_title,
190  $deep->c_fragment,
191  $deep->c_interwiki
192  );
193  $linkC = $linkRenderer->makeKnownLink( $titleC, $titleC->getFullText() );
195  $lang = $this->getLanguage();
196  $arr = $lang->getArrow() . $lang->getDirMark();
198  return ( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
199  }
207  function preprocessResults( $db, $res ) {
208  if ( !$res->numRows() ) {
209  return;
210  }
212  $batch = new LinkBatch;
213  foreach ( $res as $row ) {
214  $batch->add( $row->namespace, $row->title );
215  if ( isset( $row->b_namespace ) ) {
216  // lazy loaded when using cached results
217  $batch->add( $row->b_namespace, $row->b_title );
218  }
219  if ( isset( $row->c_interwiki ) && !$row->c_interwiki ) {
220  // lazy loaded when using cached result, not added when interwiki link
221  $batch->add( $row->c_namespace, $row->c_title );
222  }
223  }
224  $batch->execute();
226  // Back to start for display
227  $res->seek( 0 );
228  }
230  protected function getGroupName() {
231  return 'maintenance';
232  }
233 }
msg( $key)
Wrapper around wfMessage that sets the current context.
Definition: SpecialPage.php:796
The content returned by this function will be output before any result.
Definition: SpecialDoubleRedirects.php:50
Under which header this special page is listed in Special:SpecialPages See messages 'specialpages-gro...
Definition: SpecialDoubleRedirects.php:230
Class representing a list of titles The execute() method checks them all for existence and adds them ...
Definition: LinkBatch.php:34
if(!isset( $args[0])) $lang
Definition: testCompression.php:33
A special page listing redirects to redirecting page.
Definition: SpecialDoubleRedirects.php:33
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUnknownUser':When a user doesn 't exist locally, this hook is called to give extensions an opportunity to auto-create it. If the auto-creation is successful, return false. $name:User name 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Array with elements of the form "language:title" in the order that they will be output. & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED since 1.28! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition: hooks.txt:1983
Is this query expensive (for some definition of expensive)? Then we don't let it run in miser mode.
Definition: SpecialDoubleRedirects.php:38
Subclasses return an SQL query here, formatted as an array with the following keys: tables => Table(s...
Definition: SpecialDoubleRedirects.php:106
static getForTitle(Title $title)
Returns the appropriate ContentHandler singleton for the given title.
Definition: ContentHandler.php:199
Definition: database.txt:21
Shortcut to get user's language.
Definition: SpecialPage.php:755
This is a class for doing query pages; since they're almost all the same, we factor out some of the f...
Definition: QueryPage.php:35
reallyGetQueryInfo( $namespace=null, $title=null)
Definition: SpecialDoubleRedirects.php:54
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
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:38
Override to sort by increasing values.
Definition: SpecialDoubleRedirects.php:46
Definition: testCompression.php:50
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:925
Result wrapper for grabbing data queried from an IDatabase object.
Definition: IResultWrapper.php:24
formatResult( $skin, $result)
Definition: SpecialDoubleRedirects.php:119
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
Definition: GlobalFunctions.php:2636
preprocessResults( $db, $res)
Cache page content model and gender distinction for performance.
Definition: SpecialDoubleRedirects.php:207
as see the revision history and available at free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to use
Definition: MIT-LICENSE.txt:10
Shortcut to get the User executing this instance.
Definition: SpecialPage.php:735
static makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:576
Definition: defines.php:25
Subclasses return an array of fields to order by here.
Definition: SpecialDoubleRedirects.php:110
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:780
Allows to change the fields on the form that will be generated $name
Definition: hooks.txt:271
Sometime we don't want to build rss / atom feeds.
Definition: SpecialDoubleRedirects.php:42
Definition: SpecialPage.php:908
This list may contain false positives That usually means there is additional text with links below the first Each row contains links to the first and second as well as the first line of the second redirect text
Definition: All_system_messages.txt:1267
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
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 an< a > element with HTML attributes $attribs and contents $html will be returned If you return $ret will be returned $skin
Definition: hooks.txt:1985
Definition: linkcache.txt:23
MediaWiki Linker LinkRenderer null $linkRenderer
Definition: SpecialPage.php:66
__construct( $name='DoubleRedirects')
Definition: SpecialDoubleRedirects.php:34