MediaWiki  REL1_31
SpecialDoubleRedirects.php
Go to the documentation of this file.
1 <?php
26 
34  function __construct( $name = 'DoubleRedirects' ) {
35  parent::__construct( $name );
36  }
37 
38  public function isExpensive() {
39  return true;
40  }
41 
42  function isSyndicated() {
43  return false;
44  }
45 
46  function sortDescending() {
47  return false;
48  }
49 
50  function getPageHeader() {
51  return $this->msg( 'doubleredirectstext' )->parseAsBlock();
52  }
53 
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 
68  'b_namespace' => 'pb.page_namespace',
69  'b_title' => 'pb.page_title',
70 
71  // Select fields from redirect instead of page. Because there may
72  // not actually be a page table row for this target (e.g. for interwiki redirects)
73  'c_namespace' => 'rb.rd_namespace',
74  'c_title' => 'rb.rd_title',
75  'c_fragment' => 'rb.rd_fragment',
76  'c_interwiki' => 'rb.rd_interwiki',
77  ],
78  'conds' => [
79  'ra.rd_from = pa.page_id',
80 
81  // Filter out redirects where the target goes interwiki (T42353).
82  // This isn't an optimization, it is required for correct results,
83  // otherwise a non-double redirect like Bar -> w:Foo will show up
84  // like "Bar -> Foo -> w:Foo".
85 
86  // Need to check both NULL and "" for some reason,
87  // apparently either can be stored for non-iw entries.
88  'ra.rd_interwiki IS NULL OR ra.rd_interwiki = ' . $dbr->addQuotes( '' ),
89 
90  'pb.page_namespace = ra.rd_namespace',
91  'pb.page_title = ra.rd_title',
92 
93  'rb.rd_from = pb.page_id',
94  ]
95  ];
96 
97  if ( $limitToTitle ) {
98  $retval['conds']['pa.page_namespace'] = $namespace;
99  $retval['conds']['pa.page_title'] = $title;
100  }
101 
102  return $retval;
103  }
104 
105  public function getQueryInfo() {
106  return $this->reallyGetQueryInfo();
107  }
108 
109  function getOrderFields() {
110  return [ 'ra.rd_namespace', 'ra.rd_title' ];
111  }
112 
118  function formatResult( $skin, $result ) {
119  // If no Title B or C is in the query, it means this came from
120  // querycache (which only saves the 3 columns for title A).
121  // That does save the bulk of the query cost, but now we need to
122  // get a little more detail about each individual entry quickly
123  // using the filter of reallyGetQueryInfo.
124  $deep = false;
125  if ( $result ) {
126  if ( isset( $result->b_namespace ) ) {
127  $deep = $result;
128  } else {
129  $dbr = wfGetDB( DB_REPLICA );
130  $qi = $this->reallyGetQueryInfo(
131  $result->namespace,
132  $result->title
133  );
134  $res = $dbr->select(
135  $qi['tables'],
136  $qi['fields'],
137  $qi['conds'],
138  __METHOD__
139  );
140 
141  if ( $res ) {
142  $deep = $dbr->fetchObject( $res ) ?: false;
143  }
144  }
145  }
146 
147  $titleA = Title::makeTitle( $result->namespace, $result->title );
148 
149  $linkRenderer = $this->getLinkRenderer();
150  if ( !$deep ) {
151  return '<del>' . $linkRenderer->makeLink( $titleA, null, [], [ 'redirect' => 'no' ] ) . '</del>';
152  }
153 
154  // if the page is editable, add an edit link
155  if (
156  // check user permissions
157  $this->getUser()->isAllowed( 'edit' ) &&
158  // check, if the content model is editable through action=edit
159  ContentHandler::getForTitle( $titleA )->supportsDirectEditing()
160  ) {
161  $edit = $linkRenderer->makeKnownLink(
162  $titleA,
163  $this->msg( 'parentheses', $this->msg( 'editlink' )->text() )->text(),
164  [],
165  [ 'action' => 'edit' ]
166  );
167  } else {
168  $edit = '';
169  }
170 
171  $linkA = $linkRenderer->makeKnownLink(
172  $titleA,
173  null,
174  [],
175  [ 'redirect' => 'no' ]
176  );
177 
178  $titleB = Title::makeTitle( $deep->b_namespace, $deep->b_title );
179  $linkB = $linkRenderer->makeKnownLink(
180  $titleB,
181  null,
182  [],
183  [ 'redirect' => 'no' ]
184  );
185 
186  $titleC = Title::makeTitle(
187  $deep->c_namespace,
188  $deep->c_title,
189  $deep->c_fragment,
190  $deep->c_interwiki
191  );
192  $linkC = $linkRenderer->makeKnownLink( $titleC, $titleC->getFullText() );
193 
194  $lang = $this->getLanguage();
195  $arr = $lang->getArrow() . $lang->getDirMark();
196 
197  return ( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
198  }
199 
206  function preprocessResults( $db, $res ) {
207  if ( !$res->numRows() ) {
208  return;
209  }
210 
211  $batch = new LinkBatch;
212  foreach ( $res as $row ) {
213  $batch->add( $row->namespace, $row->title );
214  if ( isset( $row->b_namespace ) ) {
215  // lazy loaded when using cached results
216  $batch->add( $row->b_namespace, $row->b_title );
217  }
218  if ( isset( $row->c_interwiki ) && !$row->c_interwiki ) {
219  // lazy loaded when using cached result, not added when interwiki link
220  $batch->add( $row->c_namespace, $row->c_title );
221  }
222  }
223  $batch->execute();
224 
225  // Back to start for display
226  $res->seek( 0 );
227  }
228 
229  protected function getGroupName() {
230  return 'maintenance';
231  }
232 }
SpecialPage\msg
msg( $key)
Wrapper around wfMessage that sets the current context.
Definition: SpecialPage.php:793
DoubleRedirectsPage\getPageHeader
getPageHeader()
The content returned by this function will be output before any result.
Definition: SpecialDoubleRedirects.php:50
use
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
Definition: APACHE-LICENSE-2.0.txt:10
DoubleRedirectsPage\getGroupName
getGroupName()
Under which header this special page is listed in Special:SpecialPages See messages 'specialpages-gro...
Definition: SpecialDoubleRedirects.php:229
LinkBatch
Class representing a list of titles The execute() method checks them all for existence and adds them ...
Definition: LinkBatch.php:34
$lang
if(!isset( $args[0])) $lang
Definition: testCompression.php:33
text
design txt This is a brief overview of the new design More thorough and up to date information is available on the documentation wiki at etc Handles the details of getting and saving to the user table of the and dealing with sessions and cookies OutputPage Encapsulates the entire HTML page that will be sent in response to any server request It is used by calling its functions to add text
Definition: design.txt:18
DoubleRedirectsPage
A special page listing redirects to redirecting page.
Definition: SpecialDoubleRedirects.php:33
DoubleRedirectsPage\isExpensive
isExpensive()
Is this query expensive (for some definition of expensive)? Then we don't let it run in miser mode.
Definition: SpecialDoubleRedirects.php:38
DoubleRedirectsPage\getQueryInfo
getQueryInfo()
Subclasses return an SQL query here, formatted as an array with the following keys: tables => Table(s...
Definition: SpecialDoubleRedirects.php:105
ContentHandler\getForTitle
static getForTitle(Title $title)
Returns the appropriate ContentHandler singleton for the given title.
Definition: ContentHandler.php:240
$res
$res
Definition: database.txt:21
SpecialPage\getLanguage
getLanguage()
Shortcut to get user's language.
Definition: SpecialPage.php:752
$result
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. 'ImgAuthModifyHeaders':Executed just before a file is streamed to a user via img_auth.php, allowing headers to be modified beforehand. $title:LinkTarget object & $headers:HTTP headers(name=> value, names are case insensitive). Two headers get special handling:If-Modified-Since(value must be a valid HTTP date) and Range(must be of the form "bytes=(\d*-\d*)") will be honored when streaming the file. '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. 'LanguageGetMagic':DEPRECATED! Use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language & $magicExtensions:associative array of magic words synonyms $lang:language code(string) '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 'LanguageGetSpecialPageAliases':DEPRECATED! Use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language & $specialPageAliases:associative array of magic words synonyms $lang:language code(string) '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! 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:1993
QueryPage
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:34
DoubleRedirectsPage\reallyGetQueryInfo
reallyGetQueryInfo( $namespace=null, $title=null)
Definition: SpecialDoubleRedirects.php:54
php
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:37
Wikimedia\Rdbms\IDatabase
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:38
DoubleRedirectsPage\sortDescending
sortDescending()
Override to sort by increasing values.
Definition: SpecialDoubleRedirects.php:46
$dbr
$dbr
Definition: testCompression.php:50
Wikimedia\Rdbms\IResultWrapper
Result wrapper for grabbing data queried from an IDatabase object.
Definition: IResultWrapper.php:24
DoubleRedirectsPage\formatResult
formatResult( $skin, $result)
Definition: SpecialDoubleRedirects.php:118
wfGetDB
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
Definition: GlobalFunctions.php:2812
DoubleRedirectsPage\preprocessResults
preprocessResults( $db, $res)
Cache page content model and gender distinction for performance.
Definition: SpecialDoubleRedirects.php:206
$title
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:964
SpecialPage\getUser
getUser()
Shortcut to get the User executing this instance.
Definition: SpecialPage.php:732
Title\makeTitle
static makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:534
DB_REPLICA
const DB_REPLICA
Definition: defines.php:25
DoubleRedirectsPage\getOrderFields
getOrderFields()
Subclasses return an array of fields to order by here.
Definition: SpecialDoubleRedirects.php:109
DoubleRedirectsPage\isSyndicated
isSyndicated()
Sometime we don't want to build rss / atom feeds.
Definition: SpecialDoubleRedirects.php:42
$skin
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:2011
SpecialPage\getLinkRenderer
getLinkRenderer()
Definition: SpecialPage.php:907
$name
Allows to change the fields on the form that will be generated $name
Definition: hooks.txt:302
as
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:22
$batch
$batch
Definition: linkcache.txt:23
SpecialPage\$linkRenderer
MediaWiki Linker LinkRenderer null $linkRenderer
Definition: SpecialPage.php:66
$retval
please add to it if you re going to add events to the MediaWiki code where normally authentication against an external auth plugin would be creating a account incomplete not yet checked for validity & $retval
Definition: hooks.txt:266
DoubleRedirectsPage\__construct
__construct( $name='DoubleRedirects')
Definition: SpecialDoubleRedirects.php:34