SpecialListDuplicatedFiles Class Reference

Special:ListDuplicatedFiles Lists all files where the current version is a duplicate of the current version of some other file. More...

Inheritance diagram for SpecialListDuplicatedFiles:

Collaboration diagram for SpecialListDuplicatedFiles:

Public Member Functions
	__construct (ILoadBalancer $loadBalancer, LinkBatchFactory $linkBatchFactory)
	execute ( $par)
	This is the actual workhorse.
	formatResult ( $skin, $result)
	getQueryInfo ()
	Get all the duplicates by grouping on sha1s.
	isExpensive ()
	Should this query page only be updated offline on large wikis?
	isSyndicated ()
	Sometimes we don't want to build rss / atom feeds.
	preprocessResults ( $db, $res)
	Pre-fill the link cache.
Public Member Functions inherited from QueryPage
	delete (LinkTarget $title)
	Remove a cached result.
	deleteAllCachedData ()
	Remove all cached value This is needed when the page is no longer using the cache.
	doQuery ( $offset=false, $limit=false)
	Somewhat deprecated, you probably want to be using execute()
	fetchFromCache ( $limit, $offset=false)
	Fetch the query results from the query cache.
	getCachedTimestamp ()
	isCacheable ()
	Is the output of this query cacheable? Non-cacheable expensive pages will be disabled in miser mode and will not have their results written to the querycache table.
	isCached ()
	Whether or not the output of the page in question is retrieved from the database cache.
	reallyDoQuery ( $limit, $offset=false)
	Run the query and return the result.
	recache ( $limit, $ignoreErrors=true)
	Clear the cache and save new results.
	usesTimestamps ()
	Does this query return timestamps rather than integers in its 'value' field? If true, this class will convert 'value' to a UNIX timestamp for caching.
Public Member Functions inherited from SpecialPage
	__construct ( $name='', $restriction='', $listed=true, $function=false, $file='', $includable=false)
	Default constructor for special pages Derivative classes should call this from their constructor Note that if the user does not have the required level, an error message will be displayed by the default execute() method, without the global function ever being called.
	addHelpLink ( $to, $overrideBaseUrl=false)
	Adds help link with an icon via page indicators.
	checkPermissions ()
	Checks if userCanExecute, and if not throws a PermissionsError.
	checkReadOnly ()
	If the wiki is currently in readonly mode, throws a ReadOnlyError.
	doesWrites ()
	Indicates whether this special page may perform database writes.
	getAssociatedNavigationLinks ()
	Return an array of strings representing page titles that are discoverable to end users via UI.
	getAuthority ()
	Shortcut to get the Authority executing this instance.
	getConfig ()
	Shortcut to get main config object.
	getContentLanguage ()
	Shortcut to get content language.
	getContext ()
	Gets the context this SpecialPage is executed in.
	getDescription ()
	Returns the name that goes in the \<h1\> in the special page itself, and also the name that will be listed in Special:Specialpages.
	getFinalGroupName ()
	Get the group that the special page belongs in on Special:SpecialPage Use this method, instead of getGroupName to allow customization of the group name from the wiki side.
	getFullTitle ()
	Return the full title, including $par.
	getLanguage ()
	Shortcut to get user's language.
	getLinkRenderer ()
	getLocalName ()
	Get the localised name of the special page.
	getName ()
	Get the name of this Special Page.
	getOutput ()
	Get the OutputPage being used for this instance.
	getPageTitle ( $subpage=false)
	Get a self-referential title object.
	getRequest ()
	Get the WebRequest being used for this instance.
	getRestriction ()
	Get the permission that a user must have to execute this page.
	getShortDescription (string $path='')
	Similar to getDescription but takes into account sub pages and designed for display in tabs.
	getSkin ()
	Shortcut to get the skin being used for this instance.
	getUser ()
	Shortcut to get the User executing this instance.
	including ( $x=null)
	Whether the special page is being evaluated via transclusion.
	isIncludable ()
	Whether it's allowed to transclude the special page via {{Special:Foo/params}}.
	isListed ()
	Whether this special page is listed in Special:SpecialPages.
	isRestricted ()
	Can be overridden by subclasses with more complicated permissions schemes.
	listed ( $x=null)
	Get or set whether this special page is listed in Special:SpecialPages.
	maxIncludeCacheTime ()
	How long to cache page when it is being included.
	msg ( $key,... $params)
	Wrapper around wfMessage that sets the current context.
	prefixSearchSubpages ( $search, $limit, $offset)
	Return an array of subpages beginning with $search that this special page will accept.
	requireLogin ( $reasonMsg='exception-nologin-text', $titleMsg='exception-nologin')
	If the user is not logged in, throws UserNotLoggedIn error.
	requireNamedUser ( $reasonMsg='exception-nologin-text', $titleMsg='exception-nologin')
	If the user is not logged in or is a temporary user, throws UserNotLoggedIn.
	run ( $subPage)
	Entry point.
	setContentLanguage (Language $contentLanguage)
	Set content language.
	setContext ( $context)
	Sets the context this SpecialPage is executed in.
	setHookContainer (HookContainer $hookContainer)
	setLinkRenderer (LinkRenderer $linkRenderer)
	setListed ( $listed)
	Set whether this page is listed in Special:Specialpages, at run-time.
	setSpecialPageFactory (SpecialPageFactory $specialPageFactory)
	userCanExecute (User $user)
	Checks if the given user (identified by an object) can execute this special page (as defined by $mRestriction).

Protected Member Functions
	getGroupName ()
	Under which header this special page is listed in Special:SpecialPages See messages 'specialpages-group-*' for valid names This method defaults to group 'other'.
Protected Member Functions inherited from QueryPage
	closeList ()
	executeLBFromResultWrapper (IResultWrapper $res, $ns=null)
	Creates a new LinkBatch object, adds all pages from the passed result wrapper (MUST include title and optional the namespace field) and executes the batch.
	getCacheOrderFields ()
	Return the order fields for fetchFromCache.
	getDBLimit ( $uiLimit, $uiOffset)
	What is limit to fetch from DB.
	getDBLoadBalancer ()
	getLimitOffset ()
	Returns limit and offset, as returned by $this->getRequest()->getLimitOffsetForUser().
	getLinkBatchFactory ()
	getMaxResults ()
	Get max number of results we can return in miser mode.
	getOrderFields ()
	Subclasses return an array of fields to order by here.
	getPageHeader ()
	The content returned by this function will be output before any result.
	getRecacheDB ()
	Get a DB connection to be used for slow recache queries.
	getSQL ()
	For back-compat, subclasses may return a raw SQL query here, as a string.
	linkParameters ()
	If using extra form wheely-dealies, return a set of parameters here as an associative array.
	openList ( $offset)
	outputResults ( $out, $skin, $dbr, $res, $num, $offset)
	Format and output report results using the given information plus OutputPage.
	setDBLoadBalancer (ILoadBalancer $loadBalancer)
	setLinkBatchFactory (LinkBatchFactory $linkBatchFactory)
	setListoutput ( $bool)
	A mutator for $this->listoutput;.
	showEmptyText ()
	Outputs some kind of an informative message (via OutputPage) to let the user know that the query returned nothing and thus there's nothing to show.
	sortDescending ()
	Override to sort by increasing values.
Protected Member Functions inherited from SpecialPage
	addFeedLinks ( $params)
	Adds RSS/atom links.
	afterExecute ( $subPage)
	Gets called after.
	beforeExecute ( $subPage)
	Gets called before.
	buildPrevNextNavigation ( $offset, $limit, array $query=[], $atend=false, $subpage=false)
	Generate (prev x| next x) (20|50|100...) type links for paging.
	checkLoginSecurityLevel ( $level=null)
	Verifies that the user meets the security level, possibly reauthenticating them in the process.
	displayRestrictionError ()
	Output an error message telling the user what access level they have to have.
	getAuthManager ()
	getCacheTTL ()
	getHookContainer ()
	getHookRunner ()
	getLanguageConverter ()
	Shortcut to get language's converter.
	getLoginSecurityLevel ()
	Tells if the special page does something security-sensitive and needs extra defense against a stolen account (e.g.
	getRobotPolicy ()
	Return the robot policy.
	getSpecialPageFactory ()
	getSubpagesForPrefixSearch ()
	Return an array of subpages that this special page will accept for prefix searches.
	outputHeader ( $summaryMessageKey='')
	Outputs a summary message on top of special pages Per default the message key is the canonical name of the special page May be overridden, i.e.
	prefixSearchString ( $search, $limit, $offset, SearchEngineFactory $searchEngineFactory=null)
	Perform a regular substring search for prefixSearchSubpages.
	setAuthManager (AuthManager $authManager)
	Set the injected AuthManager from the special page constructor.
	setHeaders ()
	Sets headers - this should be called from the execute() method of all derived classes!
	setReauthPostData (array $data)
	Record preserved POST data after a reauthentication.
	useTransactionalTimeLimit ()
	Call wfTransactionalTimeLimit() if this request was POSTed.

Additional Inherited Members
Static Public Member Functions inherited from QueryPage
static	getDisabledQueryPages (Config $config)
	Get a list of query pages disabled and with it's run mode.
static	getPages ()
	Get a list of query page classes and their associated special pages, for periodic updates.
Static Public Member Functions inherited from SpecialPage
static	getSafeTitleFor ( $name, $subpage=false)
	Get a localised Title object for a page name with a possibly unvalidated subpage.
static	getTitleFor ( $name, $subpage=false, $fragment='')
	Get a localised Title object for a specified special page name If you don't need a full Title object, consider using TitleValue through getTitleValueFor() below.
static	getTitleValueFor ( $name, $subpage=false, $fragment='')
	Get a localised TitleValue object for a specified special page name.
static	newSearchPage (User $user)
	Get the users preferred search page.
Static Protected Member Functions inherited from SpecialPage
static	prefixSearchArray ( $search, $limit, array $subpages, $offset)
	Helper function for implementations of prefixSearchSubpages() that filter the values in memory (as opposed to making a query).
Protected Attributes inherited from QueryPage
string null false	$cachedTimestamp = null
int	$limit = 0
bool	$listoutput = false
	Whether or not we want plain listoutput rather than an ordered list.
int	$numRows
	The number of rows returned by the query.
int	$offset = 0
	The offset and limit in use, as passed to the query() function.
bool	$shownavigation = true
	Whether to show prev/next links.
Protected Attributes inherited from SpecialPage
IContextSource	$mContext
	Current request context.
bool	$mIncludable
	Whether the special page can be included in an article.
bool	$mIncluding
	Whether or not this special page is being included from an article.
string	$mName
	The canonical name of this special page Also used for the default.
string	$mRestriction
	Minimum user level required to access this page, or "" for anyone.

Detailed Description

Special:ListDuplicatedFiles Lists all files where the current version is a duplicate of the current version of some other file.

Definition at line 37 of file SpecialListDuplicatedFiles.php.

Constructor & Destructor Documentation

__construct()

SpecialListDuplicatedFiles::__construct	(	ILoadBalancer	$loadBalancer,
		LinkBatchFactory	$linkBatchFactory )

Parameters

ILoadBalancer	$loadBalancer
LinkBatchFactory	$linkBatchFactory

Definition at line 43 of file SpecialListDuplicatedFiles.php.

References QueryPage\setDBLoadBalancer(), and QueryPage\setLinkBatchFactory().

Member Function Documentation

execute()

SpecialListDuplicatedFiles::execute

(

$par

)

This is the actual workhorse.

It does everything needed to make a real, honest-to-gosh query page.

Stability: stable

to override

Parameters

string | null

$par

Reimplemented from QueryPage.

Definition at line 115 of file SpecialListDuplicatedFiles.php.

References SpecialPage\addHelpLink().

formatResult()

SpecialListDuplicatedFiles::formatResult	(		$skin,
			$result )

Parameters

Skin	$skin
stdClass	$result	Result row

Returns

string

Reimplemented from QueryPage.

Definition at line 101 of file SpecialListDuplicatedFiles.php.

References SpecialPage\getTitleFor(), and SpecialPage\msg().

getGroupName()

SpecialListDuplicatedFiles::getGroupName ( )

protected

Under which header this special page is listed in Special:SpecialPages See messages 'specialpages-group-*' for valid names This method defaults to group 'other'.

Stability: stable

to override

Returns

string

Since

1.21

Reimplemented from SpecialPage.

Definition at line 120 of file SpecialListDuplicatedFiles.php.

getQueryInfo()

SpecialListDuplicatedFiles::getQueryInfo

(

)

Get all the duplicates by grouping on sha1s.

A cheaper (but less useful) version of this query would be to not care how many duplicates a particular file has, and do a self-join on image table. However this version should be no more expensive then Special:MostLinked, which seems to get handled fine with however we are doing cached special pages.

Returns

array

Reimplemented from QueryPage.

Definition at line 71 of file SpecialListDuplicatedFiles.php.

References NS_FILE.

isExpensive()

SpecialListDuplicatedFiles::isExpensive

(

)

Should this query page only be updated offline on large wikis?

If the query for this page is considered too expensive to run on-demand for large wikis (e.g. every time the special page is viewed), then implement this as returning true.

"Large wikis" are those that enable $wgMiserMode. The value of isExpensive() has no effect by default when $wgMiserMode is off.

It is expected that such large wikis, periodically run the UpdateSpecialPages maintenance script to update these query pages.

By enabling $wgDisableQueryPages, all query pages will be considered as expensive and updated offline only, even query pages that do not mark themselves as expensive.

Stability: stable

to override

Returns

bool

Reimplemented from QueryPage.

Definition at line 52 of file SpecialListDuplicatedFiles.php.

isSyndicated()

SpecialListDuplicatedFiles::isSyndicated

(

)

Sometimes we don't want to build rss / atom feeds.

Stability: stable

to override

Returns

bool

Reimplemented from QueryPage.

Definition at line 56 of file SpecialListDuplicatedFiles.php.

preprocessResults()

SpecialListDuplicatedFiles::preprocessResults	(		$db,
			$res )

Pre-fill the link cache.

Parameters

IDatabase	$db
IResultWrapper	$res

Reimplemented from QueryPage.

Definition at line 92 of file SpecialListDuplicatedFiles.php.

References $res, and QueryPage\executeLBFromResultWrapper().

---

The documentation for this class was generated from the following file:

• includes/specials/SpecialListDuplicatedFiles.php