MediaWiki  master
LocalisationCache Class Reference

Caching for the contents of localisation files. More...

Inheritance diagram for LocalisationCache:

Public Member Functions

 __construct (ServiceOptions $options, LCStore $store, LoggerInterface $logger, array $clearStoreCallbacks, LanguageNameUtils $langNameUtils, HookContainer $hookContainer)
 For constructor parameters, \MediaWiki\MainConfigSchema::LocalisationCacheConf. More...
 
 disableBackend ()
 Disable the storage backend. More...
 
 getCompiledPluralRules ( $code)
 Get the compiled plural rules for a given language from the XML files. More...
 
 getItem ( $code, $key)
 Get a cache item. More...
 
 getMessagesDirs ()
 Gets the combined list of messages dirs from core and extensions. More...
 
 getPluralRules ( $code)
 Get the plural rules for a given language from the XML files. More...
 
 getPluralRuleTypes ( $code)
 Get the plural rule types for a given language from the XML files. More...
 
 getSubitem ( $code, $key, $subkey)
 Get a subitem, for instance a single message for a given language. More...
 
 getSubitemList ( $code, $key)
 Get the list of subitem keys for a given item. More...
 
 initShallowFallback ( $primaryCode, $fallbackCode)
 Create a fallback from one language to another, without creating a complete persistent cache. More...
 
 isExpired ( $code)
 Returns true if the cache identified by $code is missing or expired. More...
 
 isMergeableKey ( $key)
 Returns true if the given key is mergeable, that is, if it is an associative array which can be merged through a fallback sequence. More...
 
 readJSONFile ( $fileName)
 Read a JSON file containing localisation messages. More...
 
 recache ( $code)
 Load localisation data for a given language for both core and extensions and save it to the persistent cache store and the process cache. More...
 
 unload ( $code)
 Unload the data for a given language from the object cache. More...
 
 unloadAll ()
 Unload all data. More...
 

Static Public Member Functions

static getStoreFromConf (array $conf, $fallbackCacheDir)
 Return a suitable LCStore as specified by the given configuration. More...
 

Public Attributes

const CONSTRUCTOR_OPTIONS
 
const VERSION = 4
 

Static Public Attributes

static $allKeys
 All item keys. More...
 
static $magicWordKeys = [ 'magicWords' ]
 Keys for items that are formatted like $magicWords. More...
 
static $mergeableAliasListKeys = [ 'specialPageAliases' ]
 Keys for items which contain an array of arrays of equivalent aliases for each subitem. More...
 
static $mergeableListKeys = []
 Keys for items which are a numbered array. More...
 
static $mergeableMapKeys
 Keys for items which consist of associative arrays, which may be merged by a fallback sequence. More...
 
static $optionalMergeKeys = [ 'bookstoreList' ]
 Keys for items which contain an associative array, and may be merged if the primary value contains the special array key "inherit". More...
 
static $preloadedKeys = [ 'dateFormats', 'namespaceNames' ]
 Keys which are loaded automatically by initLanguage() More...
 
static $splitKeys = [ 'messages' ]
 Keys for items where the subitems are stored in the backend separately. More...
 

Protected Member Functions

 buildPreload ( $data)
 Build the preload item from the given pre-cache data. More...
 
 initLanguage ( $code)
 Initialise a language in this object. More...
 
 loadItem ( $code, $key)
 Load an item into the cache. More...
 
 loadPluralFile ( $fileName)
 Load a plural XML file with the given filename, compile the relevant rules, and save the compiled rules in a process-local cache. More...
 
 loadPluralFiles ()
 Load the plural XML files. More...
 
 loadSubitem ( $code, $key, $subkey)
 Load a subitem into the cache. More...
 
 mergeExtensionItem ( $codeSequence, $key, &$value, $fallbackValue)
 Given an array mapping language code to localisation value, such as is found in extension *.i18n.php files, iterate through a fallback sequence to merge the given data with an existing primary value. More...
 
 mergeItem ( $key, &$value, $fallbackValue)
 Merge two localisation values, a primary and a fallback, overwriting the primary value in place. More...
 
 mergeMagicWords (&$value, $fallbackValue)
 
 readPHPFile ( $_fileName, $_fileType)
 Read a PHP file containing localisation data. More...
 
 readSourceFilesAndRegisterDeps ( $code, &$deps)
 Read the data from the source files for a given language, and register the relevant dependencies in the $deps array. More...
 

Protected Attributes

 $data = []
 The cache data. More...
 

Detailed Description

Caching for the contents of localisation files.

Including for i18n JSON files under /languages/messages, Messages*.php, and *.i18n.php.

An instance of this class is available using MediaWikiServices.

The values retrieved from here are merged, containing items from extension files, core messages files and the language fallback sequence (e.g. zh-cn -> zh-hans -> en ). Some common errors are corrected, for example namespace names with spaces instead of underscores, but heavyweight processing, such as grammatical transformation, is done by the caller.

Definition at line 46 of file LocalisationCache.php.

Constructor & Destructor Documentation

◆ __construct()

LocalisationCache::__construct ( ServiceOptions  $options,
LCStore  $store,
LoggerInterface  $logger,
array  $clearStoreCallbacks,
LanguageNameUtils  $langNameUtils,
HookContainer  $hookContainer 
)

For constructor parameters, \MediaWiki\MainConfigSchema::LocalisationCacheConf.

Access: internal
Do not construct directly, use MediaWikiServices instead.
Parameters
ServiceOptions$options
LCStore$storeWhat backend to use for storage
LoggerInterface$logger
callable[]$clearStoreCallbacksTo be called whenever the cache is cleared. Can be used to clear other caches that depend on this one, such as ResourceLoader's MessageBlobStore.
LanguageNameUtils$langNameUtils
HookContainer$hookContainer

Definition at line 259 of file LocalisationCache.php.

References MediaWiki\Config\ServiceOptions\assertRequiredOptions(), and MediaWiki\Config\ServiceOptions\get().

Member Function Documentation

◆ buildPreload()

LocalisationCache::buildPreload (   $data)
protected

Build the preload item from the given pre-cache data.

The preload item will be loaded automatically, improving performance for the commonly-requested items it contains.

Parameters
array$data
Returns
array

Definition at line 1075 of file LocalisationCache.php.

◆ disableBackend()

LocalisationCache::disableBackend ( )

Disable the storage backend.

Definition at line 1120 of file LocalisationCache.php.

◆ getCompiledPluralRules()

LocalisationCache::getCompiledPluralRules (   $code)

Get the compiled plural rules for a given language from the XML files.

Since
1.20
Parameters
string$code
Returns
array|null

Definition at line 616 of file LocalisationCache.php.

◆ getItem()

LocalisationCache::getItem (   $code,
  $key 
)

Get a cache item.

Warning: this may be slow for split items (messages), since it will need to fetch all of the subitems from the cache individually.

Parameters
string$code
string$key
Returns
mixed

Reimplemented in LocalisationCacheBulkLoad.

Definition at line 309 of file LocalisationCache.php.

◆ getMessagesDirs()

LocalisationCache::getMessagesDirs ( )

Gets the combined list of messages dirs from core and extensions.

Since
1.25
Returns
array

Definition at line 830 of file LocalisationCache.php.

References $IP.

◆ getPluralRules()

LocalisationCache::getPluralRules (   $code)

Get the plural rules for a given language from the XML files.

Cached.

Since
1.20
Parameters
string$code
Returns
array|null

Definition at line 639 of file LocalisationCache.php.

◆ getPluralRuleTypes()

LocalisationCache::getPluralRuleTypes (   $code)

Get the plural rule types for a given language from the XML files.

Cached.

Since
1.22
Parameters
string$code
Returns
array|null

Definition at line 653 of file LocalisationCache.php.

◆ getStoreFromConf()

static LocalisationCache::getStoreFromConf ( array  $conf,
  $fallbackCacheDir 
)
static

Return a suitable LCStore as specified by the given configuration.

Since
1.34
Parameters
array$confIn the format of $wgLocalisationCacheConf
string | false | null$fallbackCacheDirIn case 'storeDirectory' isn't specified
Returns
LCStore

Definition at line 210 of file LocalisationCache.php.

Referenced by RebuildLocalisationCache\execute().

◆ getSubitem()

LocalisationCache::getSubitem (   $code,
  $key,
  $subkey 
)

Get a subitem, for instance a single message for a given language.

Parameters
string$code
string$key
string$subkey
Returns
mixed|null

Reimplemented in LocalisationCacheBulkLoad.

Definition at line 328 of file LocalisationCache.php.

◆ getSubitemList()

LocalisationCache::getSubitemList (   $code,
  $key 
)

Get the list of subitem keys for a given item.

This is faster than array_keys($lc->getItem(...)) for the items listed in self::$splitKeys.

Will return null if the item is not found, or false if the item is not an array.

Parameters
string$code
string$key
Returns
bool|null|string|string[]

Definition at line 350 of file LocalisationCache.php.

◆ initLanguage()

LocalisationCache::initLanguage (   $code)
protected

Initialise a language in this object.

Rebuild the cache if necessary.

Parameters
string$code
Exceptions
MWException

Definition at line 479 of file LocalisationCache.php.

◆ initShallowFallback()

LocalisationCache::initShallowFallback (   $primaryCode,
  $fallbackCode 
)

Create a fallback from one language to another, without creating a complete persistent cache.

Parameters
string$primaryCode
string$fallbackCode

Definition at line 540 of file LocalisationCache.php.

◆ isExpired()

LocalisationCache::isExpired (   $code)

Returns true if the cache identified by $code is missing or expired.

Parameters
string$code
Returns
bool

Definition at line 441 of file LocalisationCache.php.

References $keys, and CacheDependency\isExpired().

◆ isMergeableKey()

LocalisationCache::isMergeableKey (   $key)

Returns true if the given key is mergeable, that is, if it is an associative array which can be merged through a fallback sequence.

Parameters
string$key
Returns
bool

Definition at line 286 of file LocalisationCache.php.

◆ loadItem()

LocalisationCache::loadItem (   $code,
  $key 
)
protected

Load an item into the cache.

Parameters
string$code
string$key

Definition at line 368 of file LocalisationCache.php.

◆ loadPluralFile()

LocalisationCache::loadPluralFile (   $fileName)
protected

Load a plural XML file with the given filename, compile the relevant rules, and save the compiled rules in a process-local cache.

Parameters
string$fileName
Exceptions
MWException

Definition at line 686 of file LocalisationCache.php.

◆ loadPluralFiles()

LocalisationCache::loadPluralFiles ( )
protected

Load the plural XML files.

Definition at line 663 of file LocalisationCache.php.

◆ loadSubitem()

LocalisationCache::loadSubitem (   $code,
  $key,
  $subkey 
)
protected

Load a subitem into the cache.

Parameters
string$code
string$key
string$subkey

Definition at line 405 of file LocalisationCache.php.

◆ mergeExtensionItem()

LocalisationCache::mergeExtensionItem (   $codeSequence,
  $key,
$value,
  $fallbackValue 
)
protected

Given an array mapping language code to localisation value, such as is found in extension *.i18n.php files, iterate through a fallback sequence to merge the given data with an existing primary value.

Returns true if any data from the extension array was used, false otherwise.

Parameters
array$codeSequence
string$key
mixed&$value
mixed$fallbackValue
Returns
bool

Definition at line 811 of file LocalisationCache.php.

◆ mergeItem()

LocalisationCache::mergeItem (   $key,
$value,
  $fallbackValue 
)
protected

Merge two localisation values, a primary and a fallback, overwriting the primary value in place.

Parameters
string$key
mixed&$value
mixed$fallbackValue

Definition at line 756 of file LocalisationCache.php.

◆ mergeMagicWords()

LocalisationCache::mergeMagicWords ( $value,
  $fallbackValue 
)
protected
Parameters
mixed&$value
mixed$fallbackValue

Definition at line 784 of file LocalisationCache.php.

◆ readJSONFile()

LocalisationCache::readJSONFile (   $fileName)

Read a JSON file containing localisation messages.

Parameters
string$fileNameName of file to read
Exceptions
MWExceptionIf there is a syntax error in the JSON file
Returns
array Array with a 'messages' key, or empty array if the file doesn't exist

Definition at line 584 of file LocalisationCache.php.

References FormatJson\decode().

◆ readPHPFile()

LocalisationCache::readPHPFile (   $_fileName,
  $_fileType 
)
protected

Read a PHP file containing localisation data.

Parameters
string$_fileName
string$_fileType
Exceptions
MWException
Returns
array

Reimplemented in LocalisationCacheBulkLoad.

Definition at line 554 of file LocalisationCache.php.

◆ readSourceFilesAndRegisterDeps()

LocalisationCache::readSourceFilesAndRegisterDeps (   $code,
$deps 
)
protected

Read the data from the source files for a given language, and register the relevant dependencies in the $deps array.

If the localisation exists, the data array is returned, otherwise false is returned.

Parameters
string$code
array&$deps
Returns
array

Definition at line 725 of file LocalisationCache.php.

◆ recache()

LocalisationCache::recache (   $code)

Load localisation data for a given language for both core and extensions and save it to the persistent cache store and the process cache.

Parameters
string$code
Exceptions
MWException

Reimplemented in LocalisationCacheBulkLoad.

Definition at line 849 of file LocalisationCache.php.

References $dirs.

◆ unload()

LocalisationCache::unload (   $code)

Unload the data for a given language from the object cache.

Reduces memory usage.

Parameters
string$code

Reimplemented in LocalisationCacheBulkLoad.

Definition at line 1094 of file LocalisationCache.php.

◆ unloadAll()

LocalisationCache::unloadAll ( )

Unload all data.

Definition at line 1111 of file LocalisationCache.php.

References $lang.

Member Data Documentation

◆ $allKeys

LocalisationCache::$allKeys
static
Initial value:
= [
'fallback', 'namespaceNames', 'bookstoreList',
'magicWords', 'messages', 'rtl',
'digitTransformTable', 'separatorTransformTable',
'minimumGroupingDigits', 'fallback8bitEncoding',
'linkPrefixExtension', 'linkTrail', 'linkPrefixCharset',
'namespaceAliases', 'dateFormats', 'datePreferences',
'datePreferenceMigrationMap', 'defaultDateFormat',
'specialPageAliases', 'imageFiles', 'preloadedMessages',
'namespaceGenderAliases', 'digitGroupingPattern', 'pluralRules',
'pluralRuleTypes', 'compiledPluralRules',
]

All item keys.

Definition at line 126 of file LocalisationCache.php.

◆ $data

LocalisationCache::$data = []
protected

The cache data.

3-d array, where the first key is the language code, the second key is the item key e.g. 'messages', and the third key is an item specific subkey index. Some items are not arrays and so for those items, there are no subkeys.

Definition at line 65 of file LocalisationCache.php.

Referenced by LocalisationCacheBulkLoad\readPHPFile().

◆ $magicWordKeys

LocalisationCache::$magicWordKeys = [ 'magicWords' ]
static

Keys for items that are formatted like $magicWords.

Definition at line 168 of file LocalisationCache.php.

◆ $mergeableAliasListKeys

LocalisationCache::$mergeableAliasListKeys = [ 'specialPageAliases' ]
static

Keys for items which contain an array of arrays of equivalent aliases for each subitem.

The aliases may be merged by a fallback sequence.

Definition at line 156 of file LocalisationCache.php.

◆ $mergeableListKeys

LocalisationCache::$mergeableListKeys = []
static

Keys for items which are a numbered array.

Definition at line 150 of file LocalisationCache.php.

◆ $mergeableMapKeys

LocalisationCache::$mergeableMapKeys
static
Initial value:
= [ 'messages', 'namespaceNames',
'namespaceAliases', 'dateFormats', 'imageFiles', 'preloadedMessages'
]

Keys for items which consist of associative arrays, which may be merged by a fallback sequence.

Definition at line 143 of file LocalisationCache.php.

◆ $optionalMergeKeys

LocalisationCache::$optionalMergeKeys = [ 'bookstoreList' ]
static

Keys for items which contain an associative array, and may be merged if the primary value contains the special array key "inherit".

That array key is removed after the first merge.

Definition at line 163 of file LocalisationCache.php.

◆ $preloadedKeys

LocalisationCache::$preloadedKeys = [ 'dateFormats', 'namespaceNames' ]
static

Keys which are loaded automatically by initLanguage()

Definition at line 178 of file LocalisationCache.php.

◆ $splitKeys

LocalisationCache::$splitKeys = [ 'messages' ]
static

Keys for items where the subitems are stored in the backend separately.

Definition at line 173 of file LocalisationCache.php.

◆ CONSTRUCTOR_OPTIONS

const LocalisationCache::CONSTRUCTOR_OPTIONS
Initial value:
= [
'forceRecache',
'manualRecache',
MainConfigNames::ExtensionMessagesFiles,
MainConfigNames::MessagesDirs,
]
Access: internal
For use by ServiceWiring

Definition at line 238 of file LocalisationCache.php.

Referenced by RebuildLocalisationCache\execute().

◆ VERSION

const LocalisationCache::VERSION = 4

Definition at line 47 of file LocalisationCache.php.


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