languages/Language.php

   1 <?php
   2 /**
   3  * Internationalisation code.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Language
  22  */
  23
  24 /**
  25  * @defgroup Language Language
  26  */
  27
  28 if ( !defined( 'MEDIAWIKI' ) ) {
  29         echo "This file is part of MediaWiki, it is not a valid entry point.\n";
  30         exit( 1 );
  31 }
  32
  33 if ( function_exists( 'mb_strtoupper' ) ) {
  34         mb_internal_encoding( 'UTF-8' );
  35 }
  36
  37 use CLDRPluralRuleParser\Evaluator;
  38
  39 /**
  40  * Internationalisation code
  41  * @ingroup Language
  42  */
  43 class Language {
  44         /**
  45          * @var LanguageConverter
  46          */
  47         public $mConverter;
  48
  49         public $mVariants, $mCode, $mLoaded = false;
  50         public $mMagicExtensions = [], $mMagicHookDone = false;
  51         private $mHtmlCode = null, $mParentLanguage = false;
  52
  53         public $dateFormatStrings = [];
  54         public $mExtendedSpecialPageAliases;
  55
  56         protected $namespaceNames, $mNamespaceIds, $namespaceAliases;
  57
  58         /**
  59          * ReplacementArray object caches
  60          */
  61         public $transformData = [];
  62
  63         /**
  64          * @var LocalisationCache
  65          */
  66         static public $dataCache;
  67
  68         static public $mLangObjCache = [];
  69
  70         static public $mWeekdayMsgs = [
  71                 'sunday', 'monday', 'tuesday', 'wednesday', 'thursday',
  72                 'friday', 'saturday'
  73         ];
  74
  75         static public $mWeekdayAbbrevMsgs = [
  76                 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'
  77         ];
  78
  79         static public $mMonthMsgs = [
  80                 'january', 'february', 'march', 'april', 'may_long', 'june',
  81                 'july', 'august', 'september', 'october', 'november',
  82                 'december'
  83         ];
  84         static public $mMonthGenMsgs = [
  85                 'january-gen', 'february-gen', 'march-gen', 'april-gen', 'may-gen', 'june-gen',
  86                 'july-gen', 'august-gen', 'september-gen', 'october-gen', 'november-gen',
  87                 'december-gen'
  88         ];
  89         static public $mMonthAbbrevMsgs = [
  90                 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
  91                 'sep', 'oct', 'nov', 'dec'
  92         ];
  93
  94         static public $mIranianCalendarMonthMsgs = [
  95                 'iranian-calendar-m1', 'iranian-calendar-m2', 'iranian-calendar-m3',
  96                 'iranian-calendar-m4', 'iranian-calendar-m5', 'iranian-calendar-m6',
  97                 'iranian-calendar-m7', 'iranian-calendar-m8', 'iranian-calendar-m9',
  98                 'iranian-calendar-m10', 'iranian-calendar-m11', 'iranian-calendar-m12'
  99         ];
 100
 101         static public $mHebrewCalendarMonthMsgs = [
 102                 'hebrew-calendar-m1', 'hebrew-calendar-m2', 'hebrew-calendar-m3',
 103                 'hebrew-calendar-m4', 'hebrew-calendar-m5', 'hebrew-calendar-m6',
 104                 'hebrew-calendar-m7', 'hebrew-calendar-m8', 'hebrew-calendar-m9',
 105                 'hebrew-calendar-m10', 'hebrew-calendar-m11', 'hebrew-calendar-m12',
 106                 'hebrew-calendar-m6a', 'hebrew-calendar-m6b'
 107         ];
 108
 109         static public $mHebrewCalendarMonthGenMsgs = [
 110                 'hebrew-calendar-m1-gen', 'hebrew-calendar-m2-gen', 'hebrew-calendar-m3-gen',
 111                 'hebrew-calendar-m4-gen', 'hebrew-calendar-m5-gen', 'hebrew-calendar-m6-gen',
 112                 'hebrew-calendar-m7-gen', 'hebrew-calendar-m8-gen', 'hebrew-calendar-m9-gen',
 113                 'hebrew-calendar-m10-gen', 'hebrew-calendar-m11-gen', 'hebrew-calendar-m12-gen',
 114                 'hebrew-calendar-m6a-gen', 'hebrew-calendar-m6b-gen'
 115         ];
 116
 117         static public $mHijriCalendarMonthMsgs = [
 118                 'hijri-calendar-m1', 'hijri-calendar-m2', 'hijri-calendar-m3',
 119                 'hijri-calendar-m4', 'hijri-calendar-m5', 'hijri-calendar-m6',
 120                 'hijri-calendar-m7', 'hijri-calendar-m8', 'hijri-calendar-m9',
 121                 'hijri-calendar-m10', 'hijri-calendar-m11', 'hijri-calendar-m12'
 122         ];
 123
 124         /**
 125          * @since 1.20
 126          * @var array
 127          */
 128         static public $durationIntervals = [
 129                 'millennia' => 31556952000,
 130                 'centuries' => 3155695200,
 131                 'decades' => 315569520,
 132                 'years' => 31556952, // 86400 * ( 365 + ( 24 * 3 + 25 ) / 400 )
 133                 'weeks' => 604800,
 134                 'days' => 86400,
 135                 'hours' => 3600,
 136                 'minutes' => 60,
 137                 'seconds' => 1,
 138         ];
 139
 140         /**
 141          * Cache for language fallbacks.
 142          * @see Language::getFallbacksIncludingSiteLanguage
 143          * @since 1.21
 144          * @var array
 145          */
 146         static private $fallbackLanguageCache = [];
 147
 148         /**
 149          * Cache for language names
 150          * @var HashBagOStuff|null
 151          */
 152         static private $languageNameCache;
 153
 154         /**
 155          * Unicode directional formatting characters, for embedBidi()
 156          */
 157         static private $lre = "\xE2\x80\xAA"; // U+202A LEFT-TO-RIGHT EMBEDDING
 158         static private $rle = "\xE2\x80\xAB"; // U+202B RIGHT-TO-LEFT EMBEDDING
 159         static private $pdf = "\xE2\x80\xAC"; // U+202C POP DIRECTIONAL FORMATTING
 160
 161         /**
 162          * Directionality test regex for embedBidi(). Matches the first strong directionality codepoint:
 163          * - in group 1 if it is LTR
 164          * - in group 2 if it is RTL
 165          * Does not match if there is no strong directionality codepoint.
 166          *
 167          * The form is '/(?:([strong ltr codepoint])|([strong rtl codepoint]))/u' .
 168          *
 169          * Generated by UnicodeJS (see tools/strongDir) from the UCD; see
 170          * https://git.wikimedia.org/summary/unicodejs.git .
 171          */
 172         // @codingStandardsIgnoreStart
 173         // @codeCoverageIgnoreStart
 174         static private $strongDirRegex = 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 175         // @codeCoverageIgnoreEnd
 176         // @codingStandardsIgnoreEnd
 177
 178         /**
 179          * Get a cached or new language object for a given language code
 180          * @param string $code
 181          * @return Language
 182          */
 183         static function factory( $code ) {
 184                 global $wgDummyLanguageCodes, $wgLangObjCacheSize;
 185
 186                 if ( isset( $wgDummyLanguageCodes[$code] ) ) {
 187                         $code = $wgDummyLanguageCodes[$code];
 188                 }
 189
 190                 // get the language object to process
 191                 $langObj = isset( self::$mLangObjCache[$code] )
 192                         ? self::$mLangObjCache[$code]
 193                         : self::newFromCode( $code );
 194
 195                 // merge the language object in to get it up front in the cache
 196                 self::$mLangObjCache = array_merge( [ $code => $langObj ], self::$mLangObjCache );
 197                 // get rid of the oldest ones in case we have an overflow
 198                 self::$mLangObjCache = array_slice( self::$mLangObjCache, 0, $wgLangObjCacheSize, true );
 199
 200                 return $langObj;
 201         }
 202
 203         /**
 204          * Create a language object for a given language code
 205          * @param string $code
 206          * @throws MWException
 207          * @return Language
 208          */
 209         protected static function newFromCode( $code ) {
 210                 if ( !Language::isValidCode( $code ) ) {
 211                         throw new MWException( "Invalid language code \"$code\"" );
 212                 }
 213
 214                 if ( !Language::isValidBuiltInCode( $code ) ) {
 215                         // It's not possible to customise this code with class files, so
 216                         // just return a Language object. This is to support uselang= hacks.
 217                         $lang = new Language;
 218                         $lang->setCode( $code );
 219                         return $lang;
 220                 }
 221
 222                 // Check if there is a language class for the code
 223                 $class = self::classFromCode( $code );
 224                 if ( class_exists( $class ) ) {
 225                         $lang = new $class;
 226                         return $lang;
 227                 }
 228
 229                 // Keep trying the fallback list until we find an existing class
 230                 $fallbacks = Language::getFallbacksFor( $code );
 231                 foreach ( $fallbacks as $fallbackCode ) {
 232                         if ( !Language::isValidBuiltInCode( $fallbackCode ) ) {
 233                                 throw new MWException( "Invalid fallback '$fallbackCode' in fallback sequence for '$code'" );
 234                         }
 235
 236                         $class = self::classFromCode( $fallbackCode );
 237                         if ( class_exists( $class ) ) {
 238                                 $lang = new $class;
 239                                 $lang->setCode( $code );
 240                                 return $lang;
 241                         }
 242                 }
 243
 244                 throw new MWException( "Invalid fallback sequence for language '$code'" );
 245         }
 246
 247         /**
 248          * Checks whether any localisation is available for that language tag
 249          * in MediaWiki (MessagesXx.php exists).
 250          *
 251          * @param string $code Language tag (in lower case)
 252          * @return bool Whether language is supported
 253          * @since 1.21
 254          */
 255         public static function isSupportedLanguage( $code ) {
 256                 if ( !self::isValidBuiltInCode( $code ) ) {
 257                         return false;
 258                 }
 259
 260                 if ( $code === 'qqq' ) {
 261                         return false;
 262                 }
 263
 264                 return is_readable( self::getMessagesFileName( $code ) ) ||
 265                         is_readable( self::getJsonMessagesFileName( $code ) );
 266         }
 267
 268         /**
 269          * Returns true if a language code string is a well-formed language tag
 270          * according to RFC 5646.
 271          * This function only checks well-formedness; it doesn't check that
 272          * language, script or variant codes actually exist in the repositories.
 273          *
 274          * Based on regexes by Mark Davis of the Unicode Consortium:
 275          * http://unicode.org/repos/cldr/trunk/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
 276          *
 277          * @param string $code
 278          * @param bool $lenient Whether to allow '_' as separator. The default is only '-'.
 279          *
 280          * @return bool
 281          * @since 1.21
 282          */
 283         public static function isWellFormedLanguageTag( $code, $lenient = false ) {
 284                 $alpha = '[a-z]';
 285                 $digit = '[0-9]';
 286                 $alphanum = '[a-z0-9]';
 287                 $x = 'x'; # private use singleton
 288                 $singleton = '[a-wy-z]'; # other singleton
 289                 $s = $lenient ? '[-_]' : '-';
 290
 291                 $language = "$alpha{2,8}|$alpha{2,3}$s$alpha{3}";
 292                 $script = "$alpha{4}"; # ISO 15924
 293                 $region = "(?:$alpha{2}|$digit{3})"; # ISO 3166-1 alpha-2 or UN M.49
 294                 $variant = "(?:$alphanum{5,8}|$digit$alphanum{3})";
 295                 $extension = "$singleton(?:$s$alphanum{2,8})+";
 296                 $privateUse = "$x(?:$s$alphanum{1,8})+";
 297
 298                 # Define certain grandfathered codes, since otherwise the regex is pretty useless.
 299                 # Since these are limited, this is safe even later changes to the registry --
 300                 # the only oddity is that it might change the type of the tag, and thus
 301                 # the results from the capturing groups.
 302                 # http://www.iana.org/assignments/language-subtag-registry
 303
 304                 $grandfathered = "en{$s}GB{$s}oed"
 305                         . "|i{$s}(?:ami|bnn|default|enochian|hak|klingon|lux|mingo|navajo|pwn|tao|tay|tsu)"
 306                         . "|no{$s}(?:bok|nyn)"
 307                         . "|sgn{$s}(?:BE{$s}(?:fr|nl)|CH{$s}de)"
 308                         . "|zh{$s}min{$s}nan";
 309
 310                 $variantList = "$variant(?:$s$variant)*";
 311                 $extensionList = "$extension(?:$s$extension)*";
 312
 313                 $langtag = "(?:($language)"
 314                         . "(?:$s$script)?"
 315                         . "(?:$s$region)?"
 316                         . "(?:$s$variantList)?"
 317                         . "(?:$s$extensionList)?"
 318                         . "(?:$s$privateUse)?)";
 319
 320                 # The final breakdown, with capturing groups for each of these components
 321                 # The variants, extensions, grandfathered, and private-use may have interior '-'
 322
 323                 $root = "^(?:$langtag|$privateUse|$grandfathered)$";
 324
 325                 return (bool)preg_match( "/$root/", strtolower( $code ) );
 326         }
 327
 328         /**
 329          * Returns true if a language code string is of a valid form, whether or
 330          * not it exists. This includes codes which are used solely for
 331          * customisation via the MediaWiki namespace.
 332          *
 333          * @param string $code
 334          *
 335          * @return bool
 336          */
 337         public static function isValidCode( $code ) {
 338                 static $cache = [];
 339                 if ( !isset( $cache[$code] ) ) {
 340                         // People think language codes are html safe, so enforce it.
 341                         // Ideally we should only allow a-zA-Z0-9-
 342                         // but, .+ and other chars are often used for {{int:}} hacks
 343                         // see bugs 37564, 37587, 36938
 344                         $cache[$code] =
 345                                 // Protect against path traversal
 346                                 strcspn( $code, ":/\\\000&<>'\"" ) === strlen( $code )
 347                                 && !preg_match( MediaWikiTitleCodec::getTitleInvalidRegex(), $code );
 348                 }
 349                 return $cache[$code];
 350         }
 351
 352         /**
 353          * Returns true if a language code is of a valid form for the purposes of
 354          * internal customisation of MediaWiki, via Messages*.php or *.json.
 355          *
 356          * @param string $code
 357          *
 358          * @throws MWException
 359          * @since 1.18
 360          * @return bool
 361          */
 362         public static function isValidBuiltInCode( $code ) {
 363
 364                 if ( !is_string( $code ) ) {
 365                         if ( is_object( $code ) ) {
 366                                 $addmsg = " of class " . get_class( $code );
 367                         } else {
 368                                 $addmsg = '';
 369                         }
 370                         $type = gettype( $code );
 371                         throw new MWException( __METHOD__ . " must be passed a string, $type given$addmsg" );
 372                 }
 373
 374                 return (bool)preg_match( '/^[a-z0-9-]{2,}$/', $code );
 375         }
 376
 377         /**
 378          * Returns true if a language code is an IETF tag known to MediaWiki.
 379          *
 380          * @param string $tag
 381          *
 382          * @since 1.21
 383          * @return bool
 384          */
 385         public static function isKnownLanguageTag( $tag ) {
 386                 // Quick escape for invalid input to avoid exceptions down the line
 387                 // when code tries to process tags which are not valid at all.
 388                 if ( !self::isValidBuiltInCode( $tag ) ) {
 389                         return false;
 390                 }
 391
 392                 if ( isset( MediaWiki\Languages\Data\Names::$names[$tag] )
 393                         || self::fetchLanguageName( $tag, $tag ) !== ''
 394                 ) {
 395                         return true;
 396                 }
 397
 398                 return false;
 399         }
 400
 401         /**
 402          * Get the LocalisationCache instance
 403          *
 404          * @return LocalisationCache
 405          */
 406         public static function getLocalisationCache() {
 407                 if ( is_null( self::$dataCache ) ) {
 408                         global $wgLocalisationCacheConf;
 409                         $class = $wgLocalisationCacheConf['class'];
 410                         self::$dataCache = new $class( $wgLocalisationCacheConf );
 411                 }
 412                 return self::$dataCache;
 413         }
 414
 415         function __construct() {
 416                 $this->mConverter = new FakeConverter( $this );
 417                 // Set the code to the name of the descendant
 418                 if ( get_class( $this ) == 'Language' ) {
 419                         $this->mCode = 'en';
 420                 } else {
 421                         $this->mCode = str_replace( '_', '-', strtolower( substr( get_class( $this ), 8 ) ) );
 422                 }
 423                 self::getLocalisationCache();
 424         }
 425
 426         /**
 427          * Reduce memory usage
 428          */
 429         function __destruct() {
 430                 foreach ( $this as $name => $value ) {
 431                         unset( $this->$name );
 432                 }
 433         }
 434
 435         /**
 436          * Hook which will be called if this is the content language.
 437          * Descendants can use this to register hook functions or modify globals
 438          */
 439         function initContLang() {
 440         }
 441
 442         /**
 443          * @return array
 444          * @since 1.19
 445          */
 446         function getFallbackLanguages() {
 447                 return self::getFallbacksFor( $this->mCode );
 448         }
 449
 450         /**
 451          * Exports $wgBookstoreListEn
 452          * @return array
 453          */
 454         function getBookstoreList() {
 455                 return self::$dataCache->getItem( $this->mCode, 'bookstoreList' );
 456         }
 457
 458         /**
 459          * Returns an array of localised namespaces indexed by their numbers. If the namespace is not
 460          * available in localised form, it will be included in English.
 461          *
 462          * @return array
 463          */
 464         public function getNamespaces() {
 465                 if ( is_null( $this->namespaceNames ) ) {
 466                         global $wgMetaNamespace, $wgMetaNamespaceTalk, $wgExtraNamespaces;
 467
 468                         $this->namespaceNames = self::$dataCache->getItem( $this->mCode, 'namespaceNames' );
 469                         $validNamespaces = MWNamespace::getCanonicalNamespaces();
 470
 471                         $this->namespaceNames = $wgExtraNamespaces + $this->namespaceNames + $validNamespaces;
 472
 473                         $this->namespaceNames[NS_PROJECT] = $wgMetaNamespace;
 474                         if ( $wgMetaNamespaceTalk ) {
 475                                 $this->namespaceNames[NS_PROJECT_TALK] = $wgMetaNamespaceTalk;
 476                         } else {
 477                                 $talk = $this->namespaceNames[NS_PROJECT_TALK];
 478                                 $this->namespaceNames[NS_PROJECT_TALK] =
 479                                         $this->fixVariableInNamespace( $talk );
 480                         }
 481
 482                         # Sometimes a language will be localised but not actually exist on this wiki.
 483                         foreach ( $this->namespaceNames as $key => $text ) {
 484                                 if ( !isset( $validNamespaces[$key] ) ) {
 485                                         unset( $this->namespaceNames[$key] );
 486                                 }
 487                         }
 488
 489                         # The above mixing may leave namespaces out of canonical order.
 490                         # Re-order by namespace ID number...
 491                         ksort( $this->namespaceNames );
 492
 493                         Hooks::run( 'LanguageGetNamespaces', [ &$this->namespaceNames ] );
 494                 }
 495
 496                 return $this->namespaceNames;
 497         }
 498
 499         /**
 500          * Arbitrarily set all of the namespace names at once. Mainly used for testing
 501          * @param array $namespaces Array of namespaces (id => name)
 502          */
 503         public function setNamespaces( array $namespaces ) {
 504                 $this->namespaceNames = $namespaces;
 505                 $this->mNamespaceIds = null;
 506         }
 507
 508         /**
 509          * Resets all of the namespace caches. Mainly used for testing
 510          */
 511         public function resetNamespaces() {
 512                 $this->namespaceNames = null;
 513                 $this->mNamespaceIds = null;
 514                 $this->namespaceAliases = null;
 515         }
 516
 517         /**
 518          * A convenience function that returns getNamespaces() with spaces instead of underscores
 519          * in values. Useful for producing output to be displayed e.g. in `<select>` forms.
 520          *
 521          * @return array
 522          */
 523         function getFormattedNamespaces() {
 524                 $ns = $this->getNamespaces();
 525                 foreach ( $ns as $k => $v ) {
 526                         $ns[$k] = strtr( $v, '_', ' ' );
 527                 }
 528                 return $ns;
 529         }
 530
 531         /**
 532          * Get a namespace value by key
 533          *
 534          * <code>
 535          * $mw_ns = $wgContLang->getNsText( NS_MEDIAWIKI );
 536          * echo $mw_ns; // prints 'MediaWiki'
 537          * </code>
 538          *
 539          * @param int $index The array key of the namespace to return
 540          * @return string|bool String if the namespace value exists, otherwise false
 541          */
 542         function getNsText( $index ) {
 543                 $ns = $this->getNamespaces();
 544                 return isset( $ns[$index] ) ? $ns[$index] : false;
 545         }
 546
 547         /**
 548          * A convenience function that returns the same thing as
 549          * getNsText() except with '_' changed to ' ', useful for
 550          * producing output.
 551          *
 552          * <code>
 553          * $mw_ns = $wgContLang->getFormattedNsText( NS_MEDIAWIKI_TALK );
 554          * echo $mw_ns; // prints 'MediaWiki talk'
 555          * </code>
 556          *
 557          * @param int $index The array key of the namespace to return
 558          * @return string Namespace name without underscores (empty string if namespace does not exist)
 559          */
 560         function getFormattedNsText( $index ) {
 561                 $ns = $this->getNsText( $index );
 562                 return strtr( $ns, '_', ' ' );
 563         }
 564
 565         /**
 566          * Returns gender-dependent namespace alias if available.
 567          * See https://www.mediawiki.org/wiki/Manual:$wgExtraGenderNamespaces
 568          * @param int $index Namespace index
 569          * @param string $gender Gender key (male, female... )
 570          * @return string
 571          * @since 1.18
 572          */
 573         function getGenderNsText( $index, $gender ) {
 574                 global $wgExtraGenderNamespaces;
 575
 576                 $ns = $wgExtraGenderNamespaces +
 577                         (array)self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 578
 579                 return isset( $ns[$index][$gender] ) ? $ns[$index][$gender] : $this->getNsText( $index );
 580         }
 581
 582         /**
 583          * Whether this language uses gender-dependent namespace aliases.
 584          * See https://www.mediawiki.org/wiki/Manual:$wgExtraGenderNamespaces
 585          * @return bool
 586          * @since 1.18
 587          */
 588         function needsGenderDistinction() {
 589                 global $wgExtraGenderNamespaces, $wgExtraNamespaces;
 590                 if ( count( $wgExtraGenderNamespaces ) > 0 ) {
 591                         // $wgExtraGenderNamespaces overrides everything
 592                         return true;
 593                 } elseif ( isset( $wgExtraNamespaces[NS_USER] ) && isset( $wgExtraNamespaces[NS_USER_TALK] ) ) {
 594                         /// @todo There may be other gender namespace than NS_USER & NS_USER_TALK in the future
 595                         // $wgExtraNamespaces overrides any gender aliases specified in i18n files
 596                         return false;
 597                 } else {
 598                         // Check what is in i18n files
 599                         $aliases = self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 600                         return count( $aliases ) > 0;
 601                 }
 602         }
 603
 604         /**
 605          * Get a namespace key by value, case insensitive.
 606          * Only matches namespace names for the current language, not the
 607          * canonical ones defined in Namespace.php.
 608          *
 609          * @param string $text
 610          * @return int|bool An integer if $text is a valid value otherwise false
 611          */
 612         function getLocalNsIndex( $text ) {
 613                 $lctext = $this->lc( $text );
 614                 $ids = $this->getNamespaceIds();
 615                 return isset( $ids[$lctext] ) ? $ids[$lctext] : false;
 616         }
 617
 618         /**
 619          * @return array
 620          */
 621         function getNamespaceAliases() {
 622                 if ( is_null( $this->namespaceAliases ) ) {
 623                         $aliases = self::$dataCache->getItem( $this->mCode, 'namespaceAliases' );
 624                         if ( !$aliases ) {
 625                                 $aliases = [];
 626                         } else {
 627                                 foreach ( $aliases as $name => $index ) {
 628                                         if ( $index === NS_PROJECT_TALK ) {
 629                                                 unset( $aliases[$name] );
 630                                                 $name = $this->fixVariableInNamespace( $name );
 631                                                 $aliases[$name] = $index;
 632                                         }
 633                                 }
 634                         }
 635
 636                         global $wgExtraGenderNamespaces;
 637                         $genders = $wgExtraGenderNamespaces +
 638                                 (array)self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 639                         foreach ( $genders as $index => $forms ) {
 640                                 foreach ( $forms as $alias ) {
 641                                         $aliases[$alias] = $index;
 642                                 }
 643                         }
 644
 645                         # Also add converted namespace names as aliases, to avoid confusion.
 646                         $convertedNames = [];
 647                         foreach ( $this->getVariants() as $variant ) {
 648                                 if ( $variant === $this->mCode ) {
 649                                         continue;
 650                                 }
 651                                 foreach ( $this->getNamespaces() as $ns => $_ ) {
 652                                         $convertedNames[$this->getConverter()->convertNamespace( $ns, $variant )] = $ns;
 653                                 }
 654                         }
 655
 656                         $this->namespaceAliases = $aliases + $convertedNames;
 657                 }
 658
 659                 return $this->namespaceAliases;
 660         }
 661
 662         /**
 663          * @return array
 664          */
 665         function getNamespaceIds() {
 666                 if ( is_null( $this->mNamespaceIds ) ) {
 667                         global $wgNamespaceAliases;
 668                         # Put namespace names and aliases into a hashtable.
 669                         # If this is too slow, then we should arrange it so that it is done
 670                         # before caching. The catch is that at pre-cache time, the above
 671                         # class-specific fixup hasn't been done.
 672                         $this->mNamespaceIds = [];
 673                         foreach ( $this->getNamespaces() as $index => $name ) {
 674                                 $this->mNamespaceIds[$this->lc( $name )] = $index;
 675                         }
 676                         foreach ( $this->getNamespaceAliases() as $name => $index ) {
 677                                 $this->mNamespaceIds[$this->lc( $name )] = $index;
 678                         }
 679                         if ( $wgNamespaceAliases ) {
 680                                 foreach ( $wgNamespaceAliases as $name => $index ) {
 681                                         $this->mNamespaceIds[$this->lc( $name )] = $index;
 682                                 }
 683                         }
 684                 }
 685                 return $this->mNamespaceIds;
 686         }
 687
 688         /**
 689          * Get a namespace key by value, case insensitive.  Canonical namespace
 690          * names override custom ones defined for the current language.
 691          *
 692          * @param string $text
 693          * @return int|bool An integer if $text is a valid value otherwise false
 694          */
 695         function getNsIndex( $text ) {
 696                 $lctext = $this->lc( $text );
 697                 $ns = MWNamespace::getCanonicalIndex( $lctext );
 698                 if ( $ns !== null ) {
 699                         return $ns;
 700                 }
 701                 $ids = $this->getNamespaceIds();
 702                 return isset( $ids[$lctext] ) ? $ids[$lctext] : false;
 703         }
 704
 705         /**
 706          * short names for language variants used for language conversion links.
 707          *
 708          * @param string $code
 709          * @param bool $usemsg Use the "variantname-xyz" message if it exists
 710          * @return string
 711          */
 712         function getVariantname( $code, $usemsg = true ) {
 713                 $msg = "variantname-$code";
 714                 if ( $usemsg && wfMessage( $msg )->exists() ) {
 715                         return $this->getMessageFromDB( $msg );
 716                 }
 717                 $name = self::fetchLanguageName( $code );
 718                 if ( $name ) {
 719                         return $name; # if it's defined as a language name, show that
 720                 } else {
 721                         # otherwise, output the language code
 722                         return $code;
 723                 }
 724         }
 725
 726         /**
 727          * @deprecated since 1.24, doesn't handle conflicting aliases. Use
 728          *   SpecialPageFactory::getLocalNameFor instead.
 729          * @param string $name
 730          * @return string
 731          */
 732         function specialPage( $name ) {
 733                 $aliases = $this->getSpecialPageAliases();
 734                 if ( isset( $aliases[$name][0] ) ) {
 735                         $name = $aliases[$name][0];
 736                 }
 737                 return $this->getNsText( NS_SPECIAL ) . ':' . $name;
 738         }
 739
 740         /**
 741          * @return array
 742          */
 743         function getDatePreferences() {
 744                 return self::$dataCache->getItem( $this->mCode, 'datePreferences' );
 745         }
 746
 747         /**
 748          * @return array
 749          */
 750         function getDateFormats() {
 751                 return self::$dataCache->getItem( $this->mCode, 'dateFormats' );
 752         }
 753
 754         /**
 755          * @return array|string
 756          */
 757         function getDefaultDateFormat() {
 758                 $df = self::$dataCache->getItem( $this->mCode, 'defaultDateFormat' );
 759                 if ( $df === 'dmy or mdy' ) {
 760                         global $wgAmericanDates;
 761                         return $wgAmericanDates ? 'mdy' : 'dmy';
 762                 } else {
 763                         return $df;
 764                 }
 765         }
 766
 767         /**
 768          * @return array
 769          */
 770         function getDatePreferenceMigrationMap() {
 771                 return self::$dataCache->getItem( $this->mCode, 'datePreferenceMigrationMap' );
 772         }
 773
 774         /**
 775          * @param string $image
 776          * @return array|null
 777          */
 778         function getImageFile( $image ) {
 779                 return self::$dataCache->getSubitem( $this->mCode, 'imageFiles', $image );
 780         }
 781
 782         /**
 783          * @return array
 784          * @since 1.24
 785          */
 786         function getImageFiles() {
 787                 return self::$dataCache->getItem( $this->mCode, 'imageFiles' );
 788         }
 789
 790         /**
 791          * @return array
 792          */
 793         function getExtraUserToggles() {
 794                 return (array)self::$dataCache->getItem( $this->mCode, 'extraUserToggles' );
 795         }
 796
 797         /**
 798          * @param string $tog
 799          * @return string
 800          */
 801         function getUserToggle( $tog ) {
 802                 return $this->getMessageFromDB( "tog-$tog" );
 803         }
 804
 805         /**
 806          * Get an array of language names, indexed by code.
 807          * @param null|string $inLanguage Code of language in which to return the names
 808          *              Use null for autonyms (native names)
 809          * @param string $include One of:
 810          *              'all' all available languages
 811          *              'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
 812          *              'mwfile' only if the language is in 'mw' *and* has a message file
 813          * @return array Language code => language name
 814          * @since 1.20
 815          */
 816         public static function fetchLanguageNames( $inLanguage = null, $include = 'mw' ) {
 817                 $cacheKey = $inLanguage === null ? 'null' : $inLanguage;
 818                 $cacheKey .= ":$include";
 819                 if ( self::$languageNameCache === null ) {
 820                         self::$languageNameCache = new HashBagOStuff( [ 'maxKeys' => 20 ] );
 821                 }
 822
 823                 $ret = self::$languageNameCache->get( $cacheKey );
 824                 if ( !$ret ) {
 825                         $ret = self::fetchLanguageNamesUncached( $inLanguage, $include );
 826                         self::$languageNameCache->set( $cacheKey, $ret );
 827                 }
 828                 return $ret;
 829         }
 830
 831         /**
 832          * Uncached helper for fetchLanguageNames
 833          * @param null|string $inLanguage Code of language in which to return the names
 834          *              Use null for autonyms (native names)
 835          * @param string $include One of:
 836          *              'all' all available languages
 837          *              'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
 838          *              'mwfile' only if the language is in 'mw' *and* has a message file
 839          * @return array Language code => language name
 840          */
 841         private static function fetchLanguageNamesUncached( $inLanguage = null, $include = 'mw' ) {
 842                 global $wgExtraLanguageNames;
 843
 844                 // If passed an invalid language code to use, fallback to en
 845                 if ( $inLanguage !== null && !Language::isValidCode( $inLanguage ) ) {
 846                         $inLanguage = 'en';
 847                 }
 848
 849                 $names = [];
 850
 851                 if ( $inLanguage ) {
 852                         # TODO: also include when $inLanguage is null, when this code is more efficient
 853                         Hooks::run( 'LanguageGetTranslatedLanguageNames', [ &$names, $inLanguage ] );
 854                 }
 855
 856                 $mwNames = $wgExtraLanguageNames + MediaWiki\Languages\Data\Names::$names;
 857                 foreach ( $mwNames as $mwCode => $mwName ) {
 858                         # - Prefer own MediaWiki native name when not using the hook
 859                         # - For other names just add if not added through the hook
 860                         if ( $mwCode === $inLanguage || !isset( $names[$mwCode] ) ) {
 861                                 $names[$mwCode] = $mwName;
 862                         }
 863                 }
 864
 865                 if ( $include === 'all' ) {
 866                         ksort( $names );
 867                         return $names;
 868                 }
 869
 870                 $returnMw = [];
 871                 $coreCodes = array_keys( $mwNames );
 872                 foreach ( $coreCodes as $coreCode ) {
 873                         $returnMw[$coreCode] = $names[$coreCode];
 874                 }
 875
 876                 if ( $include === 'mwfile' ) {
 877                         $namesMwFile = [];
 878                         # We do this using a foreach over the codes instead of a directory
 879                         # loop so that messages files in extensions will work correctly.
 880                         foreach ( $returnMw as $code => $value ) {
 881                                 if ( is_readable( self::getMessagesFileName( $code ) )
 882                                         || is_readable( self::getJsonMessagesFileName( $code ) )
 883                                 ) {
 884                                         $namesMwFile[$code] = $names[$code];
 885                                 }
 886                         }
 887
 888                         ksort( $namesMwFile );
 889                         return $namesMwFile;
 890                 }
 891
 892                 ksort( $returnMw );
 893                 # 'mw' option; default if it's not one of the other two options (all/mwfile)
 894                 return $returnMw;
 895         }
 896
 897         /**
 898          * @param string $code The code of the language for which to get the name
 899          * @param null|string $inLanguage Code of language in which to return the name (null for autonyms)
 900          * @param string $include 'all', 'mw' or 'mwfile'; see fetchLanguageNames()
 901          * @return string Language name or empty
 902          * @since 1.20
 903          */
 904         public static function fetchLanguageName( $code, $inLanguage = null, $include = 'all' ) {
 905                 $code = strtolower( $code );
 906                 $array = self::fetchLanguageNames( $inLanguage, $include );
 907                 return !array_key_exists( $code, $array ) ? '' : $array[$code];
 908         }
 909
 910         /**
 911          * Get a message from the MediaWiki namespace.
 912          *
 913          * @param string $msg Message name
 914          * @return string
 915          */
 916         function getMessageFromDB( $msg ) {
 917                 return $this->msg( $msg )->text();
 918         }
 919
 920         /**
 921          * Get message object in this language. Only for use inside this class.
 922          *
 923          * @param string $msg Message name
 924          * @return Message
 925          */
 926         protected function msg( $msg ) {
 927                 return wfMessage( $msg )->inLanguage( $this );
 928         }
 929
 930         /**
 931          * @param string $key
 932          * @return string
 933          */
 934         function getMonthName( $key ) {
 935                 return $this->getMessageFromDB( self::$mMonthMsgs[$key - 1] );
 936         }
 937
 938         /**
 939          * @return array
 940          */
 941         function getMonthNamesArray() {
 942                 $monthNames = [ '' ];
 943                 for ( $i = 1; $i < 13; $i++ ) {
 944                         $monthNames[] = $this->getMonthName( $i );
 945                 }
 946                 return $monthNames;
 947         }
 948
 949         /**
 950          * @param string $key
 951          * @return string
 952          */
 953         function getMonthNameGen( $key ) {
 954                 return $this->getMessageFromDB( self::$mMonthGenMsgs[$key - 1] );
 955         }
 956
 957         /**
 958          * @param string $key
 959          * @return string
 960          */
 961         function getMonthAbbreviation( $key ) {
 962                 return $this->getMessageFromDB( self::$mMonthAbbrevMsgs[$key - 1] );
 963         }
 964
 965         /**
 966          * @return array
 967          */
 968         function getMonthAbbreviationsArray() {
 969                 $monthNames = [ '' ];
 970                 for ( $i = 1; $i < 13; $i++ ) {
 971                         $monthNames[] = $this->getMonthAbbreviation( $i );
 972                 }
 973                 return $monthNames;
 974         }
 975
 976         /**
 977          * @param string $key
 978          * @return string
 979          */
 980         function getWeekdayName( $key ) {
 981                 return $this->getMessageFromDB( self::$mWeekdayMsgs[$key - 1] );
 982         }
 983
 984         /**
 985          * @param string $key
 986          * @return string
 987          */
 988         function getWeekdayAbbreviation( $key ) {
 989                 return $this->getMessageFromDB( self::$mWeekdayAbbrevMsgs[$key - 1] );
 990         }
 991
 992         /**
 993          * @param string $key
 994          * @return string
 995          */
 996         function getIranianCalendarMonthName( $key ) {
 997                 return $this->getMessageFromDB( self::$mIranianCalendarMonthMsgs[$key - 1] );
 998         }
 999
1000         /**
1001          * @param string $key
1002          * @return string
1003          */
1004         function getHebrewCalendarMonthName( $key ) {
1005                 return $this->getMessageFromDB( self::$mHebrewCalendarMonthMsgs[$key - 1] );
1006         }
1007
1008         /**
1009          * @param string $key
1010          * @return string
1011          */
1012         function getHebrewCalendarMonthNameGen( $key ) {
1013                 return $this->getMessageFromDB( self::$mHebrewCalendarMonthGenMsgs[$key - 1] );
1014         }
1015
1016         /**
1017          * @param string $key
1018          * @return string
1019          */
1020         function getHijriCalendarMonthName( $key ) {
1021                 return $this->getMessageFromDB( self::$mHijriCalendarMonthMsgs[$key - 1] );
1022         }
1023
1024         /**
1025          * Pass through result from $dateTimeObj->format()
1026          * @param DateTime|bool|null &$dateTimeObj
1027          * @param string $ts
1028          * @param DateTimeZone|bool|null $zone
1029          * @param string $code
1030          * @return string
1031          */
1032         private static function dateTimeObjFormat( &$dateTimeObj, $ts, $zone, $code ) {
1033                 if ( !$dateTimeObj ) {
1034                         $dateTimeObj = DateTime::createFromFormat(
1035                                 'YmdHis', $ts, $zone ?: new DateTimeZone( 'UTC' )
1036                         );
1037                 }
1038                 return $dateTimeObj->format( $code );
1039         }
1040
1041         /**
1042          * This is a workalike of PHP's date() function, but with better
1043          * internationalisation, a reduced set of format characters, and a better
1044          * escaping format.
1045          *
1046          * Supported format characters are dDjlNwzWFmMntLoYyaAgGhHiscrUeIOPTZ. See
1047          * the PHP manual for definitions. There are a number of extensions, which
1048          * start with "x":
1049          *
1050          *    xn   Do not translate digits of the next numeric format character
1051          *    xN   Toggle raw digit (xn) flag, stays set until explicitly unset
1052          *    xr   Use roman numerals for the next numeric format character
1053          *    xh   Use hebrew numerals for the next numeric format character
1054          *    xx   Literal x
1055          *    xg   Genitive month name
1056          *
1057          *    xij  j (day number) in Iranian calendar
1058          *    xiF  F (month name) in Iranian calendar
1059          *    xin  n (month number) in Iranian calendar
1060          *    xiy  y (two digit year) in Iranian calendar
1061          *    xiY  Y (full year) in Iranian calendar
1062          *
1063          *    xjj  j (day number) in Hebrew calendar
1064          *    xjF  F (month name) in Hebrew calendar
1065          *    xjt  t (days in month) in Hebrew calendar
1066          *    xjx  xg (genitive month name) in Hebrew calendar
1067          *    xjn  n (month number) in Hebrew calendar
1068          *    xjY  Y (full year) in Hebrew calendar
1069          *
1070          *    xmj  j (day number) in Hijri calendar
1071          *    xmF  F (month name) in Hijri calendar
1072          *    xmn  n (month number) in Hijri calendar
1073          *    xmY  Y (full year) in Hijri calendar
1074          *
1075          *    xkY  Y (full year) in Thai solar calendar. Months and days are
1076          *                       identical to the Gregorian calendar
1077          *    xoY  Y (full year) in Minguo calendar or Juche year.
1078          *                       Months and days are identical to the
1079          *                       Gregorian calendar
1080          *    xtY  Y (full year) in Japanese nengo. Months and days are
1081          *                       identical to the Gregorian calendar
1082          *
1083          * Characters enclosed in double quotes will be considered literal (with
1084          * the quotes themselves removed). Unmatched quotes will be considered
1085          * literal quotes. Example:
1086          *
1087          * "The month is" F       => The month is January
1088          * i's"                   => 20'11"
1089          *
1090          * Backslash escaping is also supported.
1091          *
1092          * Input timestamp is assumed to be pre-normalized to the desired local
1093          * time zone, if any. Note that the format characters crUeIOPTZ will assume
1094          * $ts is UTC if $zone is not given.
1095          *
1096          * @param string $format
1097          * @param string $ts 14-character timestamp
1098          *      YYYYMMDDHHMMSS
1099          *      01234567890123
1100          * @param DateTimeZone $zone Timezone of $ts
1101          * @param[out] int $ttl The amount of time (in seconds) the output may be cached for.
1102          * Only makes sense if $ts is the current time.
1103          * @todo handling of "o" format character for Iranian, Hebrew, Hijri & Thai?
1104          *
1105          * @throws MWException
1106          * @return string
1107          */
1108         function sprintfDate( $format, $ts, DateTimeZone $zone = null, &$ttl = null ) {
1109                 $s = '';
1110                 $raw = false;
1111                 $roman = false;
1112                 $hebrewNum = false;
1113                 $dateTimeObj = false;
1114                 $rawToggle = false;
1115                 $iranian = false;
1116                 $hebrew = false;
1117                 $hijri = false;
1118                 $thai = false;
1119                 $minguo = false;
1120                 $tenno = false;
1121
1122                 $usedSecond = false;
1123                 $usedMinute = false;
1124                 $usedHour = false;
1125                 $usedAMPM = false;
1126                 $usedDay = false;
1127                 $usedWeek = false;
1128                 $usedMonth = false;
1129                 $usedYear = false;
1130                 $usedISOYear = false;
1131                 $usedIsLeapYear = false;
1132
1133                 $usedHebrewMonth = false;
1134                 $usedIranianMonth = false;
1135                 $usedHijriMonth = false;
1136                 $usedHebrewYear = false;
1137                 $usedIranianYear = false;
1138                 $usedHijriYear = false;
1139                 $usedTennoYear = false;
1140
1141                 if ( strlen( $ts ) !== 14 ) {
1142                         throw new MWException( __METHOD__ . ": The timestamp $ts should have 14 characters" );
1143                 }
1144
1145                 if ( !ctype_digit( $ts ) ) {
1146                         throw new MWException( __METHOD__ . ": The timestamp $ts should be a number" );
1147                 }
1148
1149                 $formatLength = strlen( $format );
1150                 for ( $p = 0; $p < $formatLength; $p++ ) {
1151                         $num = false;
1152                         $code = $format[$p];
1153                         if ( $code == 'x' && $p < $formatLength - 1 ) {
1154                                 $code .= $format[++$p];
1155                         }
1156
1157                         if ( ( $code === 'xi'
1158                                         || $code === 'xj'
1159                                         || $code === 'xk'
1160                                         || $code === 'xm'
1161                                         || $code === 'xo'
1162                                         || $code === 'xt' )
1163                                 && $p < $formatLength - 1 ) {
1164                                 $code .= $format[++$p];
1165                         }
1166
1167                         switch ( $code ) {
1168                                 case 'xx':
1169                                         $s .= 'x';
1170                                         break;
1171                                 case 'xn':
1172                                         $raw = true;
1173                                         break;
1174                                 case 'xN':
1175                                         $rawToggle = !$rawToggle;
1176                                         break;
1177                                 case 'xr':
1178                                         $roman = true;
1179                                         break;
1180                                 case 'xh':
1181                                         $hebrewNum = true;
1182                                         break;
1183                                 case 'xg':
1184                                         $usedMonth = true;
1185                                         $s .= $this->getMonthNameGen( substr( $ts, 4, 2 ) );
1186                                         break;
1187                                 case 'xjx':
1188                                         $usedHebrewMonth = true;
1189                                         if ( !$hebrew ) {
1190                                                 $hebrew = self::tsToHebrew( $ts );
1191                                         }
1192                                         $s .= $this->getHebrewCalendarMonthNameGen( $hebrew[1] );
1193                                         break;
1194                                 case 'd':
1195                                         $usedDay = true;
1196                                         $num = substr( $ts, 6, 2 );
1197                                         break;
1198                                 case 'D':
1199                                         $usedDay = true;
1200                                         $s .= $this->getWeekdayAbbreviation(
1201                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'w' ) + 1
1202                                         );
1203                                         break;
1204                                 case 'j':
1205                                         $usedDay = true;
1206                                         $num = intval( substr( $ts, 6, 2 ) );
1207                                         break;
1208                                 case 'xij':
1209                                         $usedDay = true;
1210                                         if ( !$iranian ) {
1211                                                 $iranian = self::tsToIranian( $ts );
1212                                         }
1213                                         $num = $iranian[2];
1214                                         break;
1215                                 case 'xmj':
1216                                         $usedDay = true;
1217                                         if ( !$hijri ) {
1218                                                 $hijri = self::tsToHijri( $ts );
1219                                         }
1220                                         $num = $hijri[2];
1221                                         break;
1222                                 case 'xjj':
1223                                         $usedDay = true;
1224                                         if ( !$hebrew ) {
1225                                                 $hebrew = self::tsToHebrew( $ts );
1226                                         }
1227                                         $num = $hebrew[2];
1228                                         break;
1229                                 case 'l':
1230                                         $usedDay = true;
1231                                         $s .= $this->getWeekdayName(
1232                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'w' ) + 1
1233                                         );
1234                                         break;
1235                                 case 'F':
1236                                         $usedMonth = true;
1237                                         $s .= $this->getMonthName( substr( $ts, 4, 2 ) );
1238                                         break;
1239                                 case 'xiF':
1240                                         $usedIranianMonth = true;
1241                                         if ( !$iranian ) {
1242                                                 $iranian = self::tsToIranian( $ts );
1243                                         }
1244                                         $s .= $this->getIranianCalendarMonthName( $iranian[1] );
1245                                         break;
1246                                 case 'xmF':
1247                                         $usedHijriMonth = true;
1248                                         if ( !$hijri ) {
1249                                                 $hijri = self::tsToHijri( $ts );
1250                                         }
1251                                         $s .= $this->getHijriCalendarMonthName( $hijri[1] );
1252                                         break;
1253                                 case 'xjF':
1254                                         $usedHebrewMonth = true;
1255                                         if ( !$hebrew ) {
1256                                                 $hebrew = self::tsToHebrew( $ts );
1257                                         }
1258                                         $s .= $this->getHebrewCalendarMonthName( $hebrew[1] );
1259                                         break;
1260                                 case 'm':
1261                                         $usedMonth = true;
1262                                         $num = substr( $ts, 4, 2 );
1263                                         break;
1264                                 case 'M':
1265                                         $usedMonth = true;
1266                                         $s .= $this->getMonthAbbreviation( substr( $ts, 4, 2 ) );
1267                                         break;
1268                                 case 'n':
1269                                         $usedMonth = true;
1270                                         $num = intval( substr( $ts, 4, 2 ) );
1271                                         break;
1272                                 case 'xin':
1273                                         $usedIranianMonth = true;
1274                                         if ( !$iranian ) {
1275                                                 $iranian = self::tsToIranian( $ts );
1276                                         }
1277                                         $num = $iranian[1];
1278                                         break;
1279                                 case 'xmn':
1280                                         $usedHijriMonth = true;
1281                                         if ( !$hijri ) {
1282                                                 $hijri = self::tsToHijri( $ts );
1283                                         }
1284                                         $num = $hijri[1];
1285                                         break;
1286                                 case 'xjn':
1287                                         $usedHebrewMonth = true;
1288                                         if ( !$hebrew ) {
1289                                                 $hebrew = self::tsToHebrew( $ts );
1290                                         }
1291                                         $num = $hebrew[1];
1292                                         break;
1293                                 case 'xjt':
1294                                         $usedHebrewMonth = true;
1295                                         if ( !$hebrew ) {
1296                                                 $hebrew = self::tsToHebrew( $ts );
1297                                         }
1298                                         $num = $hebrew[3];
1299                                         break;
1300                                 case 'Y':
1301                                         $usedYear = true;
1302                                         $num = substr( $ts, 0, 4 );
1303                                         break;
1304                                 case 'xiY':
1305                                         $usedIranianYear = true;
1306                                         if ( !$iranian ) {
1307                                                 $iranian = self::tsToIranian( $ts );
1308                                         }
1309                                         $num = $iranian[0];
1310                                         break;
1311                                 case 'xmY':
1312                                         $usedHijriYear = true;
1313                                         if ( !$hijri ) {
1314                                                 $hijri = self::tsToHijri( $ts );
1315                                         }
1316                                         $num = $hijri[0];
1317                                         break;
1318                                 case 'xjY':
1319                                         $usedHebrewYear = true;
1320                                         if ( !$hebrew ) {
1321                                                 $hebrew = self::tsToHebrew( $ts );
1322                                         }
1323                                         $num = $hebrew[0];
1324                                         break;
1325                                 case 'xkY':
1326                                         $usedYear = true;
1327                                         if ( !$thai ) {
1328                                                 $thai = self::tsToYear( $ts, 'thai' );
1329                                         }
1330                                         $num = $thai[0];
1331                                         break;
1332                                 case 'xoY':
1333                                         $usedYear = true;
1334                                         if ( !$minguo ) {
1335                                                 $minguo = self::tsToYear( $ts, 'minguo' );
1336                                         }
1337                                         $num = $minguo[0];
1338                                         break;
1339                                 case 'xtY':
1340                                         $usedTennoYear = true;
1341                                         if ( !$tenno ) {
1342                                                 $tenno = self::tsToYear( $ts, 'tenno' );
1343                                         }
1344                                         $num = $tenno[0];
1345                                         break;
1346                                 case 'y':
1347                                         $usedYear = true;
1348                                         $num = substr( $ts, 2, 2 );
1349                                         break;
1350                                 case 'xiy':
1351                                         $usedIranianYear = true;
1352                                         if ( !$iranian ) {
1353                                                 $iranian = self::tsToIranian( $ts );
1354                                         }
1355                                         $num = substr( $iranian[0], -2 );
1356                                         break;
1357                                 case 'a':
1358                                         $usedAMPM = true;
1359                                         $s .= intval( substr( $ts, 8, 2 ) ) < 12 ? 'am' : 'pm';
1360                                         break;
1361                                 case 'A':
1362                                         $usedAMPM = true;
1363                                         $s .= intval( substr( $ts, 8, 2 ) ) < 12 ? 'AM' : 'PM';
1364                                         break;
1365                                 case 'g':
1366                                         $usedHour = true;
1367                                         $h = substr( $ts, 8, 2 );
1368                                         $num = $h % 12 ? $h % 12 : 12;
1369                                         break;
1370                                 case 'G':
1371                                         $usedHour = true;
1372                                         $num = intval( substr( $ts, 8, 2 ) );
1373                                         break;
1374                                 case 'h':
1375                                         $usedHour = true;
1376                                         $h = substr( $ts, 8, 2 );
1377                                         $num = sprintf( '%02d', $h % 12 ? $h % 12 : 12 );
1378                                         break;
1379                                 case 'H':
1380                                         $usedHour = true;
1381                                         $num = substr( $ts, 8, 2 );
1382                                         break;
1383                                 case 'i':
1384                                         $usedMinute = true;
1385                                         $num = substr( $ts, 10, 2 );
1386                                         break;
1387                                 case 's':
1388                                         $usedSecond = true;
1389                                         $num = substr( $ts, 12, 2 );
1390                                         break;
1391                                 case 'c':
1392                                 case 'r':
1393                                         $usedSecond = true;
1394                                         // fall through
1395                                 case 'e':
1396                                 case 'O':
1397                                 case 'P':
1398                                 case 'T':
1399                                         $s .= Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1400                                         break;
1401                                 case 'w':
1402                                 case 'N':
1403                                 case 'z':
1404                                         $usedDay = true;
1405                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1406                                         break;
1407                                 case 'W':
1408                                         $usedWeek = true;
1409                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1410                                         break;
1411                                 case 't':
1412                                         $usedMonth = true;
1413                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1414                                         break;
1415                                 case 'L':
1416                                         $usedIsLeapYear = true;
1417                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1418                                         break;
1419                                 case 'o':
1420                                         $usedISOYear = true;
1421                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1422                                         break;
1423                                 case 'U':
1424                                         $usedSecond = true;
1425                                         // fall through
1426                                 case 'I':
1427                                 case 'Z':
1428                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1429                                         break;
1430                                 case '\\':
1431                                         # Backslash escaping
1432                                         if ( $p < $formatLength - 1 ) {
1433                                                 $s .= $format[++$p];
1434                                         } else {
1435                                                 $s .= '\\';
1436                                         }
1437                                         break;
1438                                 case '"':
1439                                         # Quoted literal
1440                                         if ( $p < $formatLength - 1 ) {
1441                                                 $endQuote = strpos( $format, '"', $p + 1 );
1442                                                 if ( $endQuote === false ) {
1443                                                         # No terminating quote, assume literal "
1444                                                         $s .= '"';
1445                                                 } else {
1446                                                         $s .= substr( $format, $p + 1, $endQuote - $p - 1 );
1447                                                         $p = $endQuote;
1448                                                 }
1449                                         } else {
1450                                                 # Quote at end of string, assume literal "
1451                                                 $s .= '"';
1452                                         }
1453                                         break;
1454                                 default:
1455                                         $s .= $format[$p];
1456                         }
1457                         if ( $num !== false ) {
1458                                 if ( $rawToggle || $raw ) {
1459                                         $s .= $num;
1460                                         $raw = false;
1461                                 } elseif ( $roman ) {
1462                                         $s .= Language::romanNumeral( $num );
1463                                         $roman = false;
1464                                 } elseif ( $hebrewNum ) {
1465                                         $s .= self::hebrewNumeral( $num );
1466                                         $hebrewNum = false;
1467                                 } else {
1468                                         $s .= $this->formatNum( $num, true );
1469                                 }
1470                         }
1471                 }
1472
1473                 if ( $usedSecond ) {
1474                         $ttl = 1;
1475                 } elseif ( $usedMinute ) {
1476                         $ttl = 60 - substr( $ts, 12, 2 );
1477                 } elseif ( $usedHour ) {
1478                         $ttl = 3600 - substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1479                 } elseif ( $usedAMPM ) {
1480                         $ttl = 43200 - ( substr( $ts, 8, 2 ) % 12 ) * 3600 -
1481                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1482                 } elseif (
1483                         $usedDay ||
1484                         $usedHebrewMonth ||
1485                         $usedIranianMonth ||
1486                         $usedHijriMonth ||
1487                         $usedHebrewYear ||
1488                         $usedIranianYear ||
1489                         $usedHijriYear ||
1490                         $usedTennoYear
1491                 ) {
1492                         // @todo Someone who understands the non-Gregorian calendars
1493                         // should write proper logic for them so that they don't need purged every day.
1494                         $ttl = 86400 - substr( $ts, 8, 2 ) * 3600 -
1495                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1496                 } else {
1497                         $possibleTtls = [];
1498                         $timeRemainingInDay = 86400 - substr( $ts, 8, 2 ) * 3600 -
1499                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1500                         if ( $usedWeek ) {
1501                                 $possibleTtls[] =
1502                                         ( 7 - Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'N' ) ) * 86400 +
1503                                         $timeRemainingInDay;
1504                         } elseif ( $usedISOYear ) {
1505                                 // December 28th falls on the last ISO week of the year, every year.
1506                                 // The last ISO week of a year can be 52 or 53.
1507                                 $lastWeekOfISOYear = DateTime::createFromFormat(
1508                                         'Ymd',
1509                                         substr( $ts, 0, 4 ) . '1228',
1510                                         $zone ?: new DateTimeZone( 'UTC' )
1511                                 )->format( 'W' );
1512                                 $currentISOWeek = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'W' );
1513                                 $weeksRemaining = $lastWeekOfISOYear - $currentISOWeek;
1514                                 $timeRemainingInWeek =
1515                                         ( 7 - Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'N' ) ) * 86400
1516                                         + $timeRemainingInDay;
1517                                 $possibleTtls[] = $weeksRemaining * 604800 + $timeRemainingInWeek;
1518                         }
1519
1520                         if ( $usedMonth ) {
1521                                 $possibleTtls[] =
1522                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 't' ) -
1523                                                 substr( $ts, 6, 2 ) ) * 86400
1524                                         + $timeRemainingInDay;
1525                         } elseif ( $usedYear ) {
1526                                 $possibleTtls[] =
1527                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'L' ) + 364 -
1528                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'z' ) ) * 86400
1529                                         + $timeRemainingInDay;
1530                         } elseif ( $usedIsLeapYear ) {
1531                                 $year = substr( $ts, 0, 4 );
1532                                 $timeRemainingInYear =
1533                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'L' ) + 364 -
1534                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'z' ) ) * 86400
1535                                         + $timeRemainingInDay;
1536                                 $mod = $year % 4;
1537                                 if ( $mod || ( !( $year % 100 ) && $year % 400 ) ) {
1538                                         // this isn't a leap year. see when the next one starts
1539                                         $nextCandidate = $year - $mod + 4;
1540                                         if ( $nextCandidate % 100 || !( $nextCandidate % 400 ) ) {
1541                                                 $possibleTtls[] = ( $nextCandidate - $year - 1 ) * 365 * 86400 +
1542                                                         $timeRemainingInYear;
1543                                         } else {
1544                                                 $possibleTtls[] = ( $nextCandidate - $year + 3 ) * 365 * 86400 +
1545                                                         $timeRemainingInYear;
1546                                         }
1547                                 } else {
1548                                         // this is a leap year, so the next year isn't
1549                                         $possibleTtls[] = $timeRemainingInYear;
1550                                 }
1551                         }
1552
1553                         if ( $possibleTtls ) {
1554                                 $ttl = min( $possibleTtls );
1555                         }
1556                 }
1557
1558                 return $s;
1559         }
1560
1561         private static $GREG_DAYS = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
1562         private static $IRANIAN_DAYS = [ 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29 ];
1563
1564         /**
1565          * Algorithm by Roozbeh Pournader and Mohammad Toossi to convert
1566          * Gregorian dates to Iranian dates. Originally written in C, it
1567          * is released under the terms of GNU Lesser General Public
1568          * License. Conversion to PHP was performed by Niklas Laxström.
1569          *
1570          * Link: http://www.farsiweb.info/jalali/jalali.c
1571          *
1572          * @param string $ts
1573          *
1574          * @return string
1575          */
1576         private static function tsToIranian( $ts ) {
1577                 $gy = substr( $ts, 0, 4 ) -1600;
1578                 $gm = substr( $ts, 4, 2 ) -1;
1579                 $gd = substr( $ts, 6, 2 ) -1;
1580
1581                 # Days passed from the beginning (including leap years)
1582                 $gDayNo = 365 * $gy
1583                         + floor( ( $gy + 3 ) / 4 )
1584                         - floor( ( $gy + 99 ) / 100 )
1585                         + floor( ( $gy + 399 ) / 400 );
1586
1587                 // Add days of the past months of this year
1588                 for ( $i = 0; $i < $gm; $i++ ) {
1589                         $gDayNo += self::$GREG_DAYS[$i];
1590                 }
1591
1592                 // Leap years
1593                 if ( $gm > 1 && ( ( $gy % 4 === 0 && $gy % 100 !== 0 || ( $gy % 400 == 0 ) ) ) ) {
1594                         $gDayNo++;
1595                 }
1596
1597                 // Days passed in current month
1598                 $gDayNo += (int)$gd;
1599
1600                 $jDayNo = $gDayNo - 79;
1601
1602                 $jNp = floor( $jDayNo / 12053 );
1603                 $jDayNo %= 12053;
1604
1605                 $jy = 979 + 33 * $jNp + 4 * floor( $jDayNo / 1461 );
1606                 $jDayNo %= 1461;
1607
1608                 if ( $jDayNo >= 366 ) {
1609                         $jy += floor( ( $jDayNo - 1 ) / 365 );
1610                         $jDayNo = floor( ( $jDayNo - 1 ) % 365 );
1611                 }
1612
1613                 for ( $i = 0; $i < 11 && $jDayNo >= self::$IRANIAN_DAYS[$i]; $i++ ) {
1614                         $jDayNo -= self::$IRANIAN_DAYS[$i];
1615                 }
1616
1617                 $jm = $i + 1;
1618                 $jd = $jDayNo + 1;
1619
1620                 return [ $jy, $jm, $jd ];
1621         }
1622
1623         /**
1624          * Converting Gregorian dates to Hijri dates.
1625          *
1626          * Based on a PHP-Nuke block by Sharjeel which is released under GNU/GPL license
1627          *
1628          * @see http://phpnuke.org/modules.php?name=News&file=article&sid=8234&mode=thread&order=0&thold=0
1629          *
1630          * @param string $ts
1631          *
1632          * @return string
1633          */
1634         private static function tsToHijri( $ts ) {
1635                 $year = substr( $ts, 0, 4 );
1636                 $month = substr( $ts, 4, 2 );
1637                 $day = substr( $ts, 6, 2 );
1638
1639                 $zyr = $year;
1640                 $zd = $day;
1641                 $zm = $month;
1642                 $zy = $zyr;
1643
1644                 if (
1645                         ( $zy > 1582 ) || ( ( $zy == 1582 ) && ( $zm > 10 ) ) ||
1646                         ( ( $zy == 1582 ) && ( $zm == 10 ) && ( $zd > 14 ) )
1647                 ) {
1648                         $zjd = (int)( ( 1461 * ( $zy + 4800 + (int)( ( $zm - 14 ) / 12 ) ) ) / 4 ) +
1649                                         (int)( ( 367 * ( $zm - 2 - 12 * ( (int)( ( $zm - 14 ) / 12 ) ) ) ) / 12 ) -
1650                                         (int)( ( 3 * (int)( ( ( $zy + 4900 + (int)( ( $zm - 14 ) / 12 ) ) / 100 ) ) ) / 4 ) +
1651                                         $zd - 32075;
1652                 } else {
1653                         $zjd = 367 * $zy - (int)( ( 7 * ( $zy + 5001 + (int)( ( $zm - 9 ) / 7 ) ) ) / 4 ) +
1654                                                                 (int)( ( 275 * $zm ) / 9 ) + $zd + 1729777;
1655                 }
1656
1657                 $zl = $zjd -1948440 + 10632;
1658                 $zn = (int)( ( $zl - 1 ) / 10631 );
1659                 $zl = $zl - 10631 * $zn + 354;
1660                 $zj = ( (int)( ( 10985 - $zl ) / 5316 ) ) * ( (int)( ( 50 * $zl ) / 17719 ) ) +
1661                         ( (int)( $zl / 5670 ) ) * ( (int)( ( 43 * $zl ) / 15238 ) );
1662                 $zl = $zl - ( (int)( ( 30 - $zj ) / 15 ) ) * ( (int)( ( 17719 * $zj ) / 50 ) ) -
1663                         ( (int)( $zj / 16 ) ) * ( (int)( ( 15238 * $zj ) / 43 ) ) + 29;
1664                 $zm = (int)( ( 24 * $zl ) / 709 );
1665                 $zd = $zl - (int)( ( 709 * $zm ) / 24 );
1666                 $zy = 30 * $zn + $zj - 30;
1667
1668                 return [ $zy, $zm, $zd ];
1669         }
1670
1671         /**
1672          * Converting Gregorian dates to Hebrew dates.
1673          *
1674          * Based on a JavaScript code by Abu Mami and Yisrael Hersch
1675          * (abu-mami@kaluach.net, http://www.kaluach.net), who permitted
1676          * to translate the relevant functions into PHP and release them under
1677          * GNU GPL.
1678          *
1679          * The months are counted from Tishrei = 1. In a leap year, Adar I is 13
1680          * and Adar II is 14. In a non-leap year, Adar is 6.
1681          *
1682          * @param string $ts
1683          *
1684          * @return string
1685          */
1686         private static function tsToHebrew( $ts ) {
1687                 # Parse date
1688                 $year = substr( $ts, 0, 4 );
1689                 $month = substr( $ts, 4, 2 );
1690                 $day = substr( $ts, 6, 2 );
1691
1692                 # Calculate Hebrew year
1693                 $hebrewYear = $year + 3760;
1694
1695                 # Month number when September = 1, August = 12
1696                 $month += 4;
1697                 if ( $month > 12 ) {
1698                         # Next year
1699                         $month -= 12;
1700                         $year++;
1701                         $hebrewYear++;
1702                 }
1703
1704                 # Calculate day of year from 1 September
1705                 $dayOfYear = $day;
1706                 for ( $i = 1; $i < $month; $i++ ) {
1707                         if ( $i == 6 ) {
1708                                 # February
1709                                 $dayOfYear += 28;
1710                                 # Check if the year is leap
1711                                 if ( $year % 400 == 0 || ( $year % 4 == 0 && $year % 100 > 0 ) ) {
1712                                         $dayOfYear++;
1713                                 }
1714                         } elseif ( $i == 8 || $i == 10 || $i == 1 || $i == 3 ) {
1715                                 $dayOfYear += 30;
1716                         } else {
1717                                 $dayOfYear += 31;
1718                         }
1719                 }
1720
1721                 # Calculate the start of the Hebrew year
1722                 $start = self::hebrewYearStart( $hebrewYear );
1723
1724                 # Calculate next year's start
1725                 if ( $dayOfYear <= $start ) {
1726                         # Day is before the start of the year - it is the previous year
1727                         # Next year's start
1728                         $nextStart = $start;
1729                         # Previous year
1730                         $year--;
1731                         $hebrewYear--;
1732                         # Add days since previous year's 1 September
1733                         $dayOfYear += 365;
1734                         if ( ( $year % 400 == 0 ) || ( $year % 100 != 0 && $year % 4 == 0 ) ) {
1735                                 # Leap year
1736                                 $dayOfYear++;
1737                         }
1738                         # Start of the new (previous) year
1739                         $start = self::hebrewYearStart( $hebrewYear );
1740                 } else {
1741                         # Next year's start
1742                         $nextStart = self::hebrewYearStart( $hebrewYear + 1 );
1743                 }
1744
1745                 # Calculate Hebrew day of year
1746                 $hebrewDayOfYear = $dayOfYear - $start;
1747
1748                 # Difference between year's days
1749                 $diff = $nextStart - $start;
1750                 # Add 12 (or 13 for leap years) days to ignore the difference between
1751                 # Hebrew and Gregorian year (353 at least vs. 365/6) - now the
1752                 # difference is only about the year type
1753                 if ( ( $year % 400 == 0 ) || ( $year % 100 != 0 && $year % 4 == 0 ) ) {
1754                         $diff += 13;
1755                 } else {
1756                         $diff += 12;
1757                 }
1758
1759                 # Check the year pattern, and is leap year
1760                 # 0 means an incomplete year, 1 means a regular year, 2 means a complete year
1761                 # This is mod 30, to work on both leap years (which add 30 days of Adar I)
1762                 # and non-leap years
1763                 $yearPattern = $diff % 30;
1764                 # Check if leap year
1765                 $isLeap = $diff >= 30;
1766
1767                 # Calculate day in the month from number of day in the Hebrew year
1768                 # Don't check Adar - if the day is not in Adar, we will stop before;
1769                 # if it is in Adar, we will use it to check if it is Adar I or Adar II
1770                 $hebrewDay = $hebrewDayOfYear;
1771                 $hebrewMonth = 1;
1772                 $days = 0;
1773                 while ( $hebrewMonth <= 12 ) {
1774                         # Calculate days in this month
1775                         if ( $isLeap && $hebrewMonth == 6 ) {
1776                                 # Adar in a leap year
1777                                 if ( $isLeap ) {
1778                                         # Leap year - has Adar I, with 30 days, and Adar II, with 29 days
1779                                         $days = 30;
1780                                         if ( $hebrewDay <= $days ) {
1781                                                 # Day in Adar I
1782                                                 $hebrewMonth = 13;
1783                                         } else {
1784                                                 # Subtract the days of Adar I
1785                                                 $hebrewDay -= $days;
1786                                                 # Try Adar II
1787                                                 $days = 29;
1788                                                 if ( $hebrewDay <= $days ) {
1789                                                         # Day in Adar II
1790                                                         $hebrewMonth = 14;
1791                                                 }
1792                                         }
1793                                 }
1794                         } elseif ( $hebrewMonth == 2 && $yearPattern == 2 ) {
1795                                 # Cheshvan in a complete year (otherwise as the rule below)
1796                                 $days = 30;
1797                         } elseif ( $hebrewMonth == 3 && $yearPattern == 0 ) {
1798                                 # Kislev in an incomplete year (otherwise as the rule below)
1799                                 $days = 29;
1800                         } else {
1801                                 # Odd months have 30 days, even have 29
1802                                 $days = 30 - ( $hebrewMonth - 1 ) % 2;
1803                         }
1804                         if ( $hebrewDay <= $days ) {
1805                                 # In the current month
1806                                 break;
1807                         } else {
1808                                 # Subtract the days of the current month
1809                                 $hebrewDay -= $days;
1810                                 # Try in the next month
1811                                 $hebrewMonth++;
1812                         }
1813                 }
1814
1815                 return [ $hebrewYear, $hebrewMonth, $hebrewDay, $days ];
1816         }
1817
1818         /**
1819          * This calculates the Hebrew year start, as days since 1 September.
1820          * Based on Carl Friedrich Gauss algorithm for finding Easter date.
1821          * Used for Hebrew date.
1822          *
1823          * @param int $year
1824          *
1825          * @return string
1826          */
1827         private static function hebrewYearStart( $year ) {
1828                 $a = intval( ( 12 * ( $year - 1 ) + 17 ) % 19 );
1829                 $b = intval( ( $year - 1 ) % 4 );
1830                 $m = 32.044093161144 + 1.5542417966212 * $a + $b / 4.0 - 0.0031777940220923 * ( $year - 1 );
1831                 if ( $m < 0 ) {
1832                         $m--;
1833                 }
1834                 $Mar = intval( $m );
1835                 if ( $m < 0 ) {
1836                         $m++;
1837                 }
1838                 $m -= $Mar;
1839
1840                 $c = intval( ( $Mar + 3 * ( $year - 1 ) + 5 * $b + 5 ) % 7 );
1841                 if ( $c == 0 && $a > 11 && $m >= 0.89772376543210 ) {
1842                         $Mar++;
1843                 } elseif ( $c == 1 && $a > 6 && $m >= 0.63287037037037 ) {
1844                         $Mar += 2;
1845                 } elseif ( $c == 2 || $c == 4 || $c == 6 ) {
1846                         $Mar++;
1847                 }
1848
1849                 $Mar += intval( ( $year - 3761 ) / 100 ) - intval( ( $year - 3761 ) / 400 ) - 24;
1850                 return $Mar;
1851         }
1852
1853         /**
1854          * Algorithm to convert Gregorian dates to Thai solar dates,
1855          * Minguo dates or Minguo dates.
1856          *
1857          * Link: http://en.wikipedia.org/wiki/Thai_solar_calendar
1858          *       http://en.wikipedia.org/wiki/Minguo_calendar
1859          *       http://en.wikipedia.org/wiki/Japanese_era_name
1860          *
1861          * @param string $ts 14-character timestamp
1862          * @param string $cName Calender name
1863          * @return array Converted year, month, day
1864          */
1865         private static function tsToYear( $ts, $cName ) {
1866                 $gy = substr( $ts, 0, 4 );
1867                 $gm = substr( $ts, 4, 2 );
1868                 $gd = substr( $ts, 6, 2 );
1869
1870                 if ( !strcmp( $cName, 'thai' ) ) {
1871                         # Thai solar dates
1872                         # Add 543 years to the Gregorian calendar
1873                         # Months and days are identical
1874                         $gy_offset = $gy + 543;
1875                 } elseif ( ( !strcmp( $cName, 'minguo' ) ) || !strcmp( $cName, 'juche' ) ) {
1876                         # Minguo dates
1877                         # Deduct 1911 years from the Gregorian calendar
1878                         # Months and days are identical
1879                         $gy_offset = $gy - 1911;
1880                 } elseif ( !strcmp( $cName, 'tenno' ) ) {
1881                         # Nengō dates up to Meiji period
1882                         # Deduct years from the Gregorian calendar
1883                         # depending on the nengo periods
1884                         # Months and days are identical
1885                         if ( ( $gy < 1912 )
1886                                 || ( ( $gy == 1912 ) && ( $gm < 7 ) )
1887                                 || ( ( $gy == 1912 ) && ( $gm == 7 ) && ( $gd < 31 ) )
1888                         ) {
1889                                 # Meiji period
1890                                 $gy_gannen = $gy - 1868 + 1;
1891                                 $gy_offset = $gy_gannen;
1892                                 if ( $gy_gannen == 1 ) {
1893                                         $gy_offset = '元';
1894                                 }
1895                                 $gy_offset = '明治' . $gy_offset;
1896                         } elseif (
1897                                 ( ( $gy == 1912 ) && ( $gm == 7 ) && ( $gd == 31 ) ) ||
1898                                 ( ( $gy == 1912 ) && ( $gm >= 8 ) ) ||
1899                                 ( ( $gy > 1912 ) && ( $gy < 1926 ) ) ||
1900                                 ( ( $gy == 1926 ) && ( $gm < 12 ) ) ||
1901                                 ( ( $gy == 1926 ) && ( $gm == 12 ) && ( $gd < 26 ) )
1902                         ) {
1903                                 # Taishō period
1904                                 $gy_gannen = $gy - 1912 + 1;
1905                                 $gy_offset = $gy_gannen;
1906                                 if ( $gy_gannen == 1 ) {
1907                                         $gy_offset = '元';
1908                                 }
1909                                 $gy_offset = '大正' . $gy_offset;
1910                         } elseif (
1911                                 ( ( $gy == 1926 ) && ( $gm == 12 ) && ( $gd >= 26 ) ) ||
1912                                 ( ( $gy > 1926 ) && ( $gy < 1989 ) ) ||
1913                                 ( ( $gy == 1989 ) && ( $gm == 1 ) && ( $gd < 8 ) )
1914                         ) {
1915                                 # Shōwa period
1916                                 $gy_gannen = $gy - 1926 + 1;
1917                                 $gy_offset = $gy_gannen;
1918                                 if ( $gy_gannen == 1 ) {
1919                                         $gy_offset = '元';
1920                                 }
1921                                 $gy_offset = '昭和' . $gy_offset;
1922                         } else {
1923                                 # Heisei period
1924                                 $gy_gannen = $gy - 1989 + 1;
1925                                 $gy_offset = $gy_gannen;
1926                                 if ( $gy_gannen == 1 ) {
1927                                         $gy_offset = '元';
1928                                 }
1929                                 $gy_offset = '平成' . $gy_offset;
1930                         }
1931                 } else {
1932                         $gy_offset = $gy;
1933                 }
1934
1935                 return [ $gy_offset, $gm, $gd ];
1936         }
1937
1938         /**
1939          * Gets directionality of the first strongly directional codepoint, for embedBidi()
1940          *
1941          * This is the rule the BIDI algorithm uses to determine the directionality of
1942          * paragraphs ( http://unicode.org/reports/tr9/#The_Paragraph_Level ) and
1943          * FSI isolates ( http://unicode.org/reports/tr9/#Explicit_Directional_Isolates ).
1944          *
1945          * TODO: Does not handle BIDI control characters inside the text.
1946          * TODO: Does not handle unallocated characters.
1947          *
1948          * @param string $text Text to test
1949          * @return null|string Directionality ('ltr' or 'rtl') or null
1950          */
1951         private static function strongDirFromContent( $text = '' ) {
1952                 if ( !preg_match( self::$strongDirRegex, $text, $matches ) ) {
1953                         return null;
1954                 }
1955                 if ( $matches[1] === '' ) {
1956                         return 'rtl';
1957                 }
1958                 return 'ltr';
1959         }
1960
1961         /**
1962          * Roman number formatting up to 10000
1963          *
1964          * @param int $num
1965          *
1966          * @return string
1967          */
1968         static function romanNumeral( $num ) {
1969                 static $table = [
1970                         [ '', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X' ],
1971                         [ '', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC', 'C' ],
1972                         [ '', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM', 'M' ],
1973                         [ '', 'M', 'MM', 'MMM', 'MMMM', 'MMMMM', 'MMMMMM', 'MMMMMMM',
1974                                 'MMMMMMMM', 'MMMMMMMMM', 'MMMMMMMMMM' ]
1975                 ];
1976
1977                 $num = intval( $num );
1978                 if ( $num > 10000 || $num <= 0 ) {
1979                         return $num;
1980                 }
1981
1982                 $s = '';
1983                 for ( $pow10 = 1000, $i = 3; $i >= 0; $pow10 /= 10, $i-- ) {
1984                         if ( $num >= $pow10 ) {
1985                                 $s .= $table[$i][(int)floor( $num / $pow10 )];
1986                         }
1987                         $num = $num % $pow10;
1988                 }
1989                 return $s;
1990         }
1991
1992         /**
1993          * Hebrew Gematria number formatting up to 9999
1994          *
1995          * @param int $num
1996          *
1997          * @return string
1998          */
1999         static function hebrewNumeral( $num ) {
2000                 static $table = [
2001                         [ '', 'א', 'ב', 'ג', 'ד', 'ה', 'ו', 'ז', 'ח', 'ט', 'י' ],
2002                         [ '', 'י', 'כ', 'ל', 'מ', 'נ', 'ס', 'ע', 'פ', 'צ', 'ק' ],
2003                         [ '',
2004                                 [ 'ק' ],
2005                                 [ 'ר' ],
2006                                 [ 'ש' ],
2007                                 [ 'ת' ],
2008                                 [ 'ת', 'ק' ],
2009                                 [ 'ת', 'ר' ],
2010                                 [ 'ת', 'ש' ],
2011                                 [ 'ת', 'ת' ],
2012                                 [ 'ת', 'ת', 'ק' ],
2013                                 [ 'ת', 'ת', 'ר' ],
2014                         ],
2015                         [ '', 'א', 'ב', 'ג', 'ד', 'ה', 'ו', 'ז', 'ח', 'ט', 'י' ]
2016                 ];
2017
2018                 $num = intval( $num );
2019                 if ( $num > 9999 || $num <= 0 ) {
2020                         return $num;
2021                 }
2022
2023                 // Round thousands have special notations
2024                 if ( $num === 1000 ) {
2025                         return "א' אלף";
2026                 } elseif ( $num % 1000 === 0 ) {
2027                         return $table[0][$num / 1000] . "' אלפים";
2028                 }
2029
2030                 $letters = [];
2031
2032                 for ( $pow10 = 1000, $i = 3; $i >= 0; $pow10 /= 10, $i-- ) {
2033                         if ( $num >= $pow10 ) {
2034                                 if ( $num === 15 || $num === 16 ) {
2035                                         $letters[] = $table[0][9];
2036                                         $letters[] = $table[0][$num - 9];
2037                                         $num = 0;
2038                                 } else {
2039                                         $letters = array_merge(
2040                                                 $letters,
2041                                                 (array)$table[$i][intval( $num / $pow10 )]
2042                                         );
2043
2044                                         if ( $pow10 === 1000 ) {
2045                                                 $letters[] = "'";
2046                                         }
2047                                 }
2048                         }
2049
2050                         $num = $num % $pow10;
2051                 }
2052
2053                 $preTransformLength = count( $letters );
2054                 if ( $preTransformLength === 1 ) {
2055                         // Add geresh (single quote) to one-letter numbers
2056                         $letters[] = "'";
2057                 } else {
2058                         $lastIndex = $preTransformLength - 1;
2059                         $letters[$lastIndex] = str_replace(
2060                                 [ 'כ', 'מ', 'נ', 'פ', 'צ' ],
2061                                 [ 'ך', 'ם', 'ן', 'ף', 'ץ' ],
2062                                 $letters[$lastIndex]
2063                         );
2064
2065                         // Add gershayim (double quote) to multiple-letter numbers,
2066                         // but exclude numbers with only one letter after the thousands
2067                         // (1001-1009, 1020, 1030, 2001-2009, etc.)
2068                         if ( $letters[1] === "'" && $preTransformLength === 3 ) {
2069                                 $letters[] = "'";
2070                         } else {
2071                                 array_splice( $letters, -1, 0, '"' );
2072                         }
2073                 }
2074
2075                 return implode( $letters );
2076         }
2077
2078         /**
2079          * Used by date() and time() to adjust the time output.
2080          *
2081          * @param string $ts The time in date('YmdHis') format
2082          * @param mixed $tz Adjust the time by this amount (default false, mean we
2083          *   get user timecorrection setting)
2084          * @return int
2085          */
2086         function userAdjust( $ts, $tz = false ) {
2087                 global $wgUser, $wgLocalTZoffset;
2088
2089                 if ( $tz === false ) {
2090                         $tz = $wgUser->getOption( 'timecorrection' );
2091                 }
2092
2093                 $data = explode( '|', $tz, 3 );
2094
2095                 if ( $data[0] == 'ZoneInfo' ) {
2096                         MediaWiki\suppressWarnings();
2097                         $userTZ = timezone_open( $data[2] );
2098                         MediaWiki\restoreWarnings();
2099                         if ( $userTZ !== false ) {
2100                                 $date = date_create( $ts, timezone_open( 'UTC' ) );
2101                                 date_timezone_set( $date, $userTZ );
2102                                 $date = date_format( $date, 'YmdHis' );
2103                                 return $date;
2104                         }
2105                         # Unrecognized timezone, default to 'Offset' with the stored offset.
2106                         $data[0] = 'Offset';
2107                 }
2108
2109                 if ( $data[0] == 'System' || $tz == '' ) {
2110                         # Global offset in minutes.
2111                         $minDiff = $wgLocalTZoffset;
2112                 } elseif ( $data[0] == 'Offset' ) {
2113                         $minDiff = intval( $data[1] );
2114                 } else {
2115                         $data = explode( ':', $tz );
2116                         if ( count( $data ) == 2 ) {
2117                                 $data[0] = intval( $data[0] );
2118                                 $data[1] = intval( $data[1] );
2119                                 $minDiff = abs( $data[0] ) * 60 + $data[1];
2120                                 if ( $data[0] < 0 ) {
2121                                         $minDiff = -$minDiff;
2122                                 }
2123                         } else {
2124                                 $minDiff = intval( $data[0] ) * 60;
2125                         }
2126                 }
2127
2128                 # No difference ? Return time unchanged
2129                 if ( 0 == $minDiff ) {
2130                         return $ts;
2131                 }
2132
2133                 MediaWiki\suppressWarnings(); // E_STRICT system time bitching
2134                 # Generate an adjusted date; take advantage of the fact that mktime
2135                 # will normalize out-of-range values so we don't have to split $minDiff
2136                 # into hours and minutes.
2137                 $t = mktime( (
2138                         (int)substr( $ts, 8, 2 ) ), # Hours
2139                         (int)substr( $ts, 10, 2 ) + $minDiff, # Minutes
2140                         (int)substr( $ts, 12, 2 ), # Seconds
2141                         (int)substr( $ts, 4, 2 ), # Month
2142                         (int)substr( $ts, 6, 2 ), # Day
2143                         (int)substr( $ts, 0, 4 ) ); # Year
2144
2145                 $date = date( 'YmdHis', $t );
2146                 MediaWiki\restoreWarnings();
2147
2148                 return $date;
2149         }
2150
2151         /**
2152          * This is meant to be used by time(), date(), and timeanddate() to get
2153          * the date preference they're supposed to use, it should be used in
2154          * all children.
2155          *
2156          *<code>
2157          * function timeanddate([...], $format = true) {
2158          *      $datePreference = $this->dateFormat($format);
2159          * [...]
2160          * }
2161          *</code>
2162          *
2163          * @param int|string|bool $usePrefs If true, the user's preference is used
2164          *   if false, the site/language default is used
2165          *   if int/string, assumed to be a format.
2166          * @return string
2167          */
2168         function dateFormat( $usePrefs = true ) {
2169                 global $wgUser;
2170
2171                 if ( is_bool( $usePrefs ) ) {
2172                         if ( $usePrefs ) {
2173                                 $datePreference = $wgUser->getDatePreference();
2174                         } else {
2175                                 $datePreference = (string)User::getDefaultOption( 'date' );
2176                         }
2177                 } else {
2178                         $datePreference = (string)$usePrefs;
2179                 }
2180
2181                 // return int
2182                 if ( $datePreference == '' ) {
2183                         return 'default';
2184                 }
2185
2186                 return $datePreference;
2187         }
2188
2189         /**
2190          * Get a format string for a given type and preference
2191          * @param string $type May be 'date', 'time', 'both', or 'pretty'.
2192          * @param string $pref The format name as it appears in Messages*.php under
2193          *  $datePreferences.
2194          *
2195          * @since 1.22 New type 'pretty' that provides a more readable timestamp format
2196          *
2197          * @return string
2198          */
2199         function getDateFormatString( $type, $pref ) {
2200                 $wasDefault = false;
2201                 if ( $pref == 'default' ) {
2202                         $wasDefault = true;
2203                         $pref = $this->getDefaultDateFormat();
2204                 }
2205
2206                 if ( !isset( $this->dateFormatStrings[$type][$pref] ) ) {
2207                         $df = self::$dataCache->getSubitem( $this->mCode, 'dateFormats', "$pref $type" );
2208
2209                         if ( $type === 'pretty' && $df === null ) {
2210                                 $df = $this->getDateFormatString( 'date', $pref );
2211                         }
2212
2213                         if ( !$wasDefault && $df === null ) {
2214                                 $pref = $this->getDefaultDateFormat();
2215                                 $df = self::$dataCache->getSubitem( $this->mCode, 'dateFormats', "$pref $type" );
2216                         }
2217
2218                         $this->dateFormatStrings[$type][$pref] = $df;
2219                 }
2220                 return $this->dateFormatStrings[$type][$pref];
2221         }
2222
2223         /**
2224          * @param string $ts The time format which needs to be turned into a
2225          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2226          * @param bool $adj Whether to adjust the time output according to the
2227          *   user configured offset ($timecorrection)
2228          * @param mixed $format True to use user's date format preference
2229          * @param string|bool $timecorrection The time offset as returned by
2230          *   validateTimeZone() in Special:Preferences
2231          * @return string
2232          */
2233         function date( $ts, $adj = false, $format = true, $timecorrection = false ) {
2234                 $ts = wfTimestamp( TS_MW, $ts );
2235                 if ( $adj ) {
2236                         $ts = $this->userAdjust( $ts, $timecorrection );
2237                 }
2238                 $df = $this->getDateFormatString( 'date', $this->dateFormat( $format ) );
2239                 return $this->sprintfDate( $df, $ts );
2240         }
2241
2242         /**
2243          * @param string $ts The time format which needs to be turned into a
2244          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2245          * @param bool $adj Whether to adjust the time output according to the
2246          *   user configured offset ($timecorrection)
2247          * @param mixed $format True to use user's date format preference
2248          * @param string|bool $timecorrection The time offset as returned by
2249          *   validateTimeZone() in Special:Preferences
2250          * @return string
2251          */
2252         function time( $ts, $adj = false, $format = true, $timecorrection = false ) {
2253                 $ts = wfTimestamp( TS_MW, $ts );
2254                 if ( $adj ) {
2255                         $ts = $this->userAdjust( $ts, $timecorrection );
2256                 }
2257                 $df = $this->getDateFormatString( 'time', $this->dateFormat( $format ) );
2258                 return $this->sprintfDate( $df, $ts );
2259         }
2260
2261         /**
2262          * @param string $ts The time format which needs to be turned into a
2263          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2264          * @param bool $adj Whether to adjust the time output according to the
2265          *   user configured offset ($timecorrection)
2266          * @param mixed $format What format to return, if it's false output the
2267          *   default one (default true)
2268          * @param string|bool $timecorrection The time offset as returned by
2269          *   validateTimeZone() in Special:Preferences
2270          * @return string
2271          */
2272         function timeanddate( $ts, $adj = false, $format = true, $timecorrection = false ) {
2273                 $ts = wfTimestamp( TS_MW, $ts );
2274                 if ( $adj ) {
2275                         $ts = $this->userAdjust( $ts, $timecorrection );
2276                 }
2277                 $df = $this->getDateFormatString( 'both', $this->dateFormat( $format ) );
2278                 return $this->sprintfDate( $df, $ts );
2279         }
2280
2281         /**
2282          * Takes a number of seconds and turns it into a text using values such as hours and minutes.
2283          *
2284          * @since 1.20
2285          *
2286          * @param int $seconds The amount of seconds.
2287          * @param array $chosenIntervals The intervals to enable.
2288          *
2289          * @return string
2290          */
2291         public function formatDuration( $seconds, array $chosenIntervals = [] ) {
2292                 $intervals = $this->getDurationIntervals( $seconds, $chosenIntervals );
2293
2294                 $segments = [];
2295
2296                 foreach ( $intervals as $intervalName => $intervalValue ) {
2297                         // Messages: duration-seconds, duration-minutes, duration-hours, duration-days, duration-weeks,
2298                         // duration-years, duration-decades, duration-centuries, duration-millennia
2299                         $message = wfMessage( 'duration-' . $intervalName )->numParams( $intervalValue );
2300                         $segments[] = $message->inLanguage( $this )->escaped();
2301                 }
2302
2303                 return $this->listToText( $segments );
2304         }
2305
2306         /**
2307          * Takes a number of seconds and returns an array with a set of corresponding intervals.
2308          * For example 65 will be turned into array( minutes => 1, seconds => 5 ).
2309          *
2310          * @since 1.20
2311          *
2312          * @param int $seconds The amount of seconds.
2313          * @param array $chosenIntervals The intervals to enable.
2314          *
2315          * @return array
2316          */
2317         public function getDurationIntervals( $seconds, array $chosenIntervals = [] ) {
2318                 if ( empty( $chosenIntervals ) ) {
2319                         $chosenIntervals = [
2320                                 'millennia',
2321                                 'centuries',
2322                                 'decades',
2323                                 'years',
2324                                 'days',
2325                                 'hours',
2326                                 'minutes',
2327                                 'seconds'
2328                         ];
2329                 }
2330
2331                 $intervals = array_intersect_key( self::$durationIntervals, array_flip( $chosenIntervals ) );
2332                 $sortedNames = array_keys( $intervals );
2333                 $smallestInterval = array_pop( $sortedNames );
2334
2335                 $segments = [];
2336
2337                 foreach ( $intervals as $name => $length ) {
2338                         $value = floor( $seconds / $length );
2339
2340                         if ( $value > 0 || ( $name == $smallestInterval && empty( $segments ) ) ) {
2341                                 $seconds -= $value * $length;
2342                                 $segments[$name] = $value;
2343                         }
2344                 }
2345
2346                 return $segments;
2347         }
2348
2349         /**
2350          * Internal helper function for userDate(), userTime() and userTimeAndDate()
2351          *
2352          * @param string $type Can be 'date', 'time' or 'both'
2353          * @param string $ts The time format which needs to be turned into a
2354          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2355          * @param User $user User object used to get preferences for timezone and format
2356          * @param array $options Array, can contain the following keys:
2357          *   - 'timecorrection': time correction, can have the following values:
2358          *     - true: use user's preference
2359          *     - false: don't use time correction
2360          *     - int: value of time correction in minutes
2361          *   - 'format': format to use, can have the following values:
2362          *     - true: use user's preference
2363          *     - false: use default preference
2364          *     - string: format to use
2365          * @since 1.19
2366          * @return string
2367          */
2368         private function internalUserTimeAndDate( $type, $ts, User $user, array $options ) {
2369                 $ts = wfTimestamp( TS_MW, $ts );
2370                 $options += [ 'timecorrection' => true, 'format' => true ];
2371                 if ( $options['timecorrection'] !== false ) {
2372                         if ( $options['timecorrection'] === true ) {
2373                                 $offset = $user->getOption( 'timecorrection' );
2374                         } else {
2375                                 $offset = $options['timecorrection'];
2376                         }
2377                         $ts = $this->userAdjust( $ts, $offset );
2378                 }
2379                 if ( $options['format'] === true ) {
2380                         $format = $user->getDatePreference();
2381                 } else {
2382                         $format = $options['format'];
2383                 }
2384                 $df = $this->getDateFormatString( $type, $this->dateFormat( $format ) );
2385                 return $this->sprintfDate( $df, $ts );
2386         }
2387
2388         /**
2389          * Get the formatted date for the given timestamp and formatted for
2390          * the given user.
2391          *
2392          * @param mixed $ts Mixed: the time format which needs to be turned into a
2393          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2394          * @param User $user User object used to get preferences for timezone and format
2395          * @param array $options Array, can contain the following keys:
2396          *   - 'timecorrection': time correction, can have the following values:
2397          *     - true: use user's preference
2398          *     - false: don't use time correction
2399          *     - int: value of time correction in minutes
2400          *   - 'format': format to use, can have the following values:
2401          *     - true: use user's preference
2402          *     - false: use default preference
2403          *     - string: format to use
2404          * @since 1.19
2405          * @return string
2406          */
2407         public function userDate( $ts, User $user, array $options = [] ) {
2408                 return $this->internalUserTimeAndDate( 'date', $ts, $user, $options );
2409         }
2410
2411         /**
2412          * Get the formatted time for the given timestamp and formatted for
2413          * the given user.
2414          *
2415          * @param mixed $ts The time format which needs to be turned into a
2416          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2417          * @param User $user User object used to get preferences for timezone and format
2418          * @param array $options Array, can contain the following keys:
2419          *   - 'timecorrection': time correction, can have the following values:
2420          *     - true: use user's preference
2421          *     - false: don't use time correction
2422          *     - int: value of time correction in minutes
2423          *   - 'format': format to use, can have the following values:
2424          *     - true: use user's preference
2425          *     - false: use default preference
2426          *     - string: format to use
2427          * @since 1.19
2428          * @return string
2429          */
2430         public function userTime( $ts, User $user, array $options = [] ) {
2431                 return $this->internalUserTimeAndDate( 'time', $ts, $user, $options );
2432         }
2433
2434         /**
2435          * Get the formatted date and time for the given timestamp and formatted for
2436          * the given user.
2437          *
2438          * @param mixed $ts The time format which needs to be turned into a
2439          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2440          * @param User $user User object used to get preferences for timezone and format
2441          * @param array $options Array, can contain the following keys:
2442          *   - 'timecorrection': time correction, can have the following values:
2443          *     - true: use user's preference
2444          *     - false: don't use time correction
2445          *     - int: value of time correction in minutes
2446          *   - 'format': format to use, can have the following values:
2447          *     - true: use user's preference
2448          *     - false: use default preference
2449          *     - string: format to use
2450          * @since 1.19
2451          * @return string
2452          */
2453         public function userTimeAndDate( $ts, User $user, array $options = [] ) {
2454                 return $this->internalUserTimeAndDate( 'both', $ts, $user, $options );
2455         }
2456
2457         /**
2458          * Get the timestamp in a human-friendly relative format, e.g., "3 days ago".
2459          *
2460          * Determine the difference between the timestamp and the current time, and
2461          * generate a readable timestamp by returning "<N> <units> ago", where the
2462          * largest possible unit is used.
2463          *
2464          * @since 1.26 (Prior to 1.26 method existed but was not meant to be used directly)
2465          *
2466          * @param MWTimestamp $time
2467          * @param MWTimestamp|null $relativeTo The base timestamp to compare to (defaults to now)
2468          * @param User|null $user User the timestamp is being generated for
2469          *  (or null to use main context's user)
2470          * @return string Formatted timestamp
2471          */
2472         public function getHumanTimestamp(
2473                 MWTimestamp $time, MWTimestamp $relativeTo = null, User $user = null
2474         ) {
2475                 if ( $relativeTo === null ) {
2476                         $relativeTo = new MWTimestamp();
2477                 }
2478                 if ( $user === null ) {
2479                         $user = RequestContext::getMain()->getUser();
2480                 }
2481
2482                 // Adjust for the user's timezone.
2483                 $offsetThis = $time->offsetForUser( $user );
2484                 $offsetRel = $relativeTo->offsetForUser( $user );
2485
2486                 $ts = '';
2487                 if ( Hooks::run( 'GetHumanTimestamp', [ &$ts, $time, $relativeTo, $user, $this ] ) ) {
2488                         $ts = $this->getHumanTimestampInternal( $time, $relativeTo, $user );
2489                 }
2490
2491                 // Reset the timezone on the objects.
2492                 $time->timestamp->sub( $offsetThis );
2493                 $relativeTo->timestamp->sub( $offsetRel );
2494
2495                 return $ts;
2496         }
2497
2498         /**
2499          * Convert an MWTimestamp into a pretty human-readable timestamp using
2500          * the given user preferences and relative base time.
2501          *
2502          * @see Language::getHumanTimestamp
2503          * @param MWTimestamp $ts Timestamp to prettify
2504          * @param MWTimestamp $relativeTo Base timestamp
2505          * @param User $user User preferences to use
2506          * @return string Human timestamp
2507          * @since 1.26
2508          */
2509         private function getHumanTimestampInternal(
2510                 MWTimestamp $ts, MWTimestamp $relativeTo, User $user
2511         ) {
2512                 $diff = $ts->diff( $relativeTo );
2513                 $diffDay = (bool)( (int)$ts->timestamp->format( 'w' ) -
2514                         (int)$relativeTo->timestamp->format( 'w' ) );
2515                 $days = $diff->days ?: (int)$diffDay;
2516                 if ( $diff->invert || $days > 5
2517                         && $ts->timestamp->format( 'Y' ) !== $relativeTo->timestamp->format( 'Y' )
2518                 ) {
2519                         // Timestamps are in different years: use full timestamp
2520                         // Also do full timestamp for future dates
2521                         /**
2522                          * @todo FIXME: Add better handling of future timestamps.
2523                          */
2524                         $format = $this->getDateFormatString( 'both', $user->getDatePreference() ?: 'default' );
2525                         $ts = $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) );
2526                 } elseif ( $days > 5 ) {
2527                         // Timestamps are in same year,  but more than 5 days ago: show day and month only.
2528                         $format = $this->getDateFormatString( 'pretty', $user->getDatePreference() ?: 'default' );
2529                         $ts = $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) );
2530                 } elseif ( $days > 1 ) {
2531                         // Timestamp within the past week: show the day of the week and time
2532                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2533                         $weekday = self::$mWeekdayMsgs[$ts->timestamp->format( 'w' )];
2534                         // Messages:
2535                         // sunday-at, monday-at, tuesday-at, wednesday-at, thursday-at, friday-at, saturday-at
2536                         $ts = wfMessage( "$weekday-at" )
2537                                 ->inLanguage( $this )
2538                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2539                                 ->text();
2540                 } elseif ( $days == 1 ) {
2541                         // Timestamp was yesterday: say 'yesterday' and the time.
2542                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2543                         $ts = wfMessage( 'yesterday-at' )
2544                                 ->inLanguage( $this )
2545                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2546                                 ->text();
2547                 } elseif ( $diff->h > 1 || $diff->h == 1 && $diff->i > 30 ) {
2548                         // Timestamp was today, but more than 90 minutes ago: say 'today' and the time.
2549                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2550                         $ts = wfMessage( 'today-at' )
2551                                 ->inLanguage( $this )
2552                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2553                                 ->text();
2554
2555                 // From here on in, the timestamp was soon enough ago so that we can simply say
2556                 // XX units ago, e.g., "2 hours ago" or "5 minutes ago"
2557                 } elseif ( $diff->h == 1 ) {
2558                         // Less than 90 minutes, but more than an hour ago.
2559                         $ts = wfMessage( 'hours-ago' )->inLanguage( $this )->numParams( 1 )->text();
2560                 } elseif ( $diff->i >= 1 ) {
2561                         // A few minutes ago.
2562                         $ts = wfMessage( 'minutes-ago' )->inLanguage( $this )->numParams( $diff->i )->text();
2563                 } elseif ( $diff->s >= 30 ) {
2564                         // Less than a minute, but more than 30 sec ago.
2565                         $ts = wfMessage( 'seconds-ago' )->inLanguage( $this )->numParams( $diff->s )->text();
2566                 } else {
2567                         // Less than 30 seconds ago.
2568                         $ts = wfMessage( 'just-now' )->text();
2569                 }
2570
2571                 return $ts;
2572         }
2573
2574         /**
2575          * @param string $key
2576          * @return array|null
2577          */
2578         function getMessage( $key ) {
2579                 return self::$dataCache->getSubitem( $this->mCode, 'messages', $key );
2580         }
2581
2582         /**
2583          * @return array
2584          */
2585         function getAllMessages() {
2586                 return self::$dataCache->getItem( $this->mCode, 'messages' );
2587         }
2588
2589         /**
2590          * @param string $in
2591          * @param string $out
2592          * @param string $string
2593          * @return string
2594          */
2595         function iconv( $in, $out, $string ) {
2596                 # This is a wrapper for iconv in all languages except esperanto,
2597                 # which does some nasty x-conversions beforehand
2598
2599                 # Even with //IGNORE iconv can whine about illegal characters in
2600                 # *input* string. We just ignore those too.
2601                 # REF: http://bugs.php.net/bug.php?id=37166
2602                 # REF: https://phabricator.wikimedia.org/T18885
2603                 MediaWiki\suppressWarnings();
2604                 $text = iconv( $in, $out . '//IGNORE', $string );
2605                 MediaWiki\restoreWarnings();
2606                 return $text;
2607         }
2608
2609         // callback functions for uc(), lc(), ucwords(), ucwordbreaks()
2610
2611         /**
2612          * @param array $matches
2613          * @return mixed|string
2614          */
2615         function ucwordbreaksCallbackAscii( $matches ) {
2616                 return $this->ucfirst( $matches[1] );
2617         }
2618
2619         /**
2620          * @param array $matches
2621          * @return string
2622          */
2623         function ucwordbreaksCallbackMB( $matches ) {
2624                 return mb_strtoupper( $matches[0] );
2625         }
2626
2627         /**
2628          * @param array $matches
2629          * @return string
2630          */
2631         function ucCallback( $matches ) {
2632                 list( $wikiUpperChars ) = self::getCaseMaps();
2633                 return strtr( $matches[1], $wikiUpperChars );
2634         }
2635
2636         /**
2637          * @param array $matches
2638          * @return string
2639          */
2640         function lcCallback( $matches ) {
2641                 list( , $wikiLowerChars ) = self::getCaseMaps();
2642                 return strtr( $matches[1], $wikiLowerChars );
2643         }
2644
2645         /**
2646          * @param array $matches
2647          * @return string
2648          */
2649         function ucwordsCallbackMB( $matches ) {
2650                 return mb_strtoupper( $matches[0] );
2651         }
2652
2653         /**
2654          * @param array $matches
2655          * @return string
2656          */
2657         function ucwordsCallbackWiki( $matches ) {
2658                 list( $wikiUpperChars ) = self::getCaseMaps();
2659                 return strtr( $matches[0], $wikiUpperChars );
2660         }
2661
2662         /**
2663          * Make a string's first character uppercase
2664          *
2665          * @param string $str
2666          *
2667          * @return string
2668          */
2669         function ucfirst( $str ) {
2670                 $o = ord( $str );
2671                 if ( $o < 96 ) { // if already uppercase...
2672                         return $str;
2673                 } elseif ( $o < 128 ) {
2674                         return ucfirst( $str ); // use PHP's ucfirst()
2675                 } else {
2676                         // fall back to more complex logic in case of multibyte strings
2677                         return $this->uc( $str, true );
2678                 }
2679         }
2680
2681         /**
2682          * Convert a string to uppercase
2683          *
2684          * @param string $str
2685          * @param bool $first
2686          *
2687          * @return string
2688          */
2689         function uc( $str, $first = false ) {
2690                 if ( function_exists( 'mb_strtoupper' ) ) {
2691                         if ( $first ) {
2692                                 if ( $this->isMultibyte( $str ) ) {
2693                                         return mb_strtoupper( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
2694                                 } else {
2695                                         return ucfirst( $str );
2696                                 }
2697                         } else {
2698                                 return $this->isMultibyte( $str ) ? mb_strtoupper( $str ) : strtoupper( $str );
2699                         }
2700                 } else {
2701                         if ( $this->isMultibyte( $str ) ) {
2702                                 $x = $first ? '^' : '';
2703                                 return preg_replace_callback(
2704                                         "/$x([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/",
2705                                         [ $this, 'ucCallback' ],
2706                                         $str
2707                                 );
2708                         } else {
2709                                 return $first ? ucfirst( $str ) : strtoupper( $str );
2710                         }
2711                 }
2712         }
2713
2714         /**
2715          * @param string $str
2716          * @return mixed|string
2717          */
2718         function lcfirst( $str ) {
2719                 $o = ord( $str );
2720                 if ( !$o ) {
2721                         return strval( $str );
2722                 } elseif ( $o >= 128 ) {
2723                         return $this->lc( $str, true );
2724                 } elseif ( $o > 96 ) {
2725                         return $str;
2726                 } else {
2727                         $str[0] = strtolower( $str[0] );
2728                         return $str;
2729                 }
2730         }
2731
2732         /**
2733          * @param string $str
2734          * @param bool $first
2735          * @return mixed|string
2736          */
2737         function lc( $str, $first = false ) {
2738                 if ( function_exists( 'mb_strtolower' ) ) {
2739                         if ( $first ) {
2740                                 if ( $this->isMultibyte( $str ) ) {
2741                                         return mb_strtolower( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
2742                                 } else {
2743                                         return strtolower( substr( $str, 0, 1 ) ) . substr( $str, 1 );
2744                                 }
2745                         } else {
2746                                 return $this->isMultibyte( $str ) ? mb_strtolower( $str ) : strtolower( $str );
2747                         }
2748                 } else {
2749                         if ( $this->isMultibyte( $str ) ) {
2750                                 $x = $first ? '^' : '';
2751                                 return preg_replace_callback(
2752                                         "/$x([A-Z]|[\\xc0-\\xff][\\x80-\\xbf]*)/",
2753                                         [ $this, 'lcCallback' ],
2754                                         $str
2755                                 );
2756                         } else {
2757                                 return $first ? strtolower( substr( $str, 0, 1 ) ) . substr( $str, 1 ) : strtolower( $str );
2758                         }
2759                 }
2760         }
2761
2762         /**
2763          * @param string $str
2764          * @return bool
2765          */
2766         function isMultibyte( $str ) {
2767                 return strlen( $str ) !== mb_strlen( $str );
2768         }
2769
2770         /**
2771          * @param string $str
2772          * @return mixed|string
2773          */
2774         function ucwords( $str ) {
2775                 if ( $this->isMultibyte( $str ) ) {
2776                         $str = $this->lc( $str );
2777
2778                         // regexp to find first letter in each word (i.e. after each space)
2779                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)| ([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
2780
2781                         // function to use to capitalize a single char
2782                         if ( function_exists( 'mb_strtoupper' ) ) {
2783                                 return preg_replace_callback(
2784                                         $replaceRegexp,
2785                                         [ $this, 'ucwordsCallbackMB' ],
2786                                         $str
2787                                 );
2788                         } else {
2789                                 return preg_replace_callback(
2790                                         $replaceRegexp,
2791                                         [ $this, 'ucwordsCallbackWiki' ],
2792                                         $str
2793                                 );
2794                         }
2795                 } else {
2796                         return ucwords( strtolower( $str ) );
2797                 }
2798         }
2799
2800         /**
2801          * capitalize words at word breaks
2802          *
2803          * @param string $str
2804          * @return mixed
2805          */
2806         function ucwordbreaks( $str ) {
2807                 if ( $this->isMultibyte( $str ) ) {
2808                         $str = $this->lc( $str );
2809
2810                         // since \b doesn't work for UTF-8, we explicitely define word break chars
2811                         $breaks = "[ \-\(\)\}\{\.,\?!]";
2812
2813                         // find first letter after word break
2814                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)|" .
2815                                 "$breaks([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
2816
2817                         if ( function_exists( 'mb_strtoupper' ) ) {
2818                                 return preg_replace_callback(
2819                                         $replaceRegexp,
2820                                         [ $this, 'ucwordbreaksCallbackMB' ],
2821                                         $str
2822                                 );
2823                         } else {
2824                                 return preg_replace_callback(
2825                                         $replaceRegexp,
2826                                         [ $this, 'ucwordsCallbackWiki' ],
2827                                         $str
2828                                 );
2829                         }
2830                 } else {
2831                         return preg_replace_callback(
2832                                 '/\b([\w\x80-\xff]+)\b/',
2833                                 [ $this, 'ucwordbreaksCallbackAscii' ],
2834                                 $str
2835                         );
2836                 }
2837         }
2838
2839         /**
2840          * Return a case-folded representation of $s
2841          *
2842          * This is a representation such that caseFold($s1)==caseFold($s2) if $s1
2843          * and $s2 are the same except for the case of their characters. It is not
2844          * necessary for the value returned to make sense when displayed.
2845          *
2846          * Do *not* perform any other normalisation in this function. If a caller
2847          * uses this function when it should be using a more general normalisation
2848          * function, then fix the caller.
2849          *
2850          * @param string $s
2851          *
2852          * @return string
2853          */
2854         function caseFold( $s ) {
2855                 return $this->uc( $s );
2856         }
2857
2858         /**
2859          * @param string $s
2860          * @return string
2861          */
2862         function checkTitleEncoding( $s ) {
2863                 if ( is_array( $s ) ) {
2864                         throw new MWException( 'Given array to checkTitleEncoding.' );
2865                 }
2866                 if ( StringUtils::isUtf8( $s ) ) {
2867                         return $s;
2868                 }
2869
2870                 return $this->iconv( $this->fallback8bitEncoding(), 'utf-8', $s );
2871         }
2872
2873         /**
2874          * @return array
2875          */
2876         function fallback8bitEncoding() {
2877                 return self::$dataCache->getItem( $this->mCode, 'fallback8bitEncoding' );
2878         }
2879
2880         /**
2881          * Most writing systems use whitespace to break up words.
2882          * Some languages such as Chinese don't conventionally do this,
2883          * which requires special handling when breaking up words for
2884          * searching etc.
2885          *
2886          * @return bool
2887          */
2888         function hasWordBreaks() {
2889                 return true;
2890         }
2891
2892         /**
2893          * Some languages such as Chinese require word segmentation,
2894          * Specify such segmentation when overridden in derived class.
2895          *
2896          * @param string $string
2897          * @return string
2898          */
2899         function segmentByWord( $string ) {
2900                 return $string;
2901         }
2902
2903         /**
2904          * Some languages have special punctuation need to be normalized.
2905          * Make such changes here.
2906          *
2907          * @param string $string
2908          * @return string
2909          */
2910         function normalizeForSearch( $string ) {
2911                 return self::convertDoubleWidth( $string );
2912         }
2913
2914         /**
2915          * convert double-width roman characters to single-width.
2916          * range: ff00-ff5f ~= 0020-007f
2917          *
2918          * @param string $string
2919          *
2920          * @return string
2921          */
2922         protected static function convertDoubleWidth( $string ) {
2923                 static $full = null;
2924                 static $half = null;
2925
2926                 if ( $full === null ) {
2927                         $fullWidth = "０１２３４５６７８９ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ";
2928                         $halfWidth = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
2929                         $full = str_split( $fullWidth, 3 );
2930                         $half = str_split( $halfWidth );
2931                 }
2932
2933                 $string = str_replace( $full, $half, $string );
2934                 return $string;
2935         }
2936
2937         /**
2938          * @param string $string
2939          * @param string $pattern
2940          * @return string
2941          */
2942         protected static function insertSpace( $string, $pattern ) {
2943                 $string = preg_replace( $pattern, " $1 ", $string );
2944                 $string = preg_replace( '/ +/', ' ', $string );
2945                 return $string;
2946         }
2947
2948         /**
2949          * @param array $termsArray
2950          * @return array
2951          */
2952         function convertForSearchResult( $termsArray ) {
2953                 # some languages, e.g. Chinese, need to do a conversion
2954                 # in order for search results to be displayed correctly
2955                 return $termsArray;
2956         }
2957
2958         /**
2959          * Get the first character of a string.
2960          *
2961          * @param string $s
2962          * @return string
2963          */
2964         function firstChar( $s ) {
2965                 $matches = [];
2966                 preg_match(
2967                         '/^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|' .
2968                                 '[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3})/',
2969                         $s,
2970                         $matches
2971                 );
2972
2973                 if ( isset( $matches[1] ) ) {
2974                         if ( strlen( $matches[1] ) != 3 ) {
2975                                 return $matches[1];
2976                         }
2977
2978                         // Break down Hangul syllables to grab the first jamo
2979                         $code = UtfNormal\Utils::utf8ToCodepoint( $matches[1] );
2980                         if ( $code < 0xac00 || 0xd7a4 <= $code ) {
2981                                 return $matches[1];
2982                         } elseif ( $code < 0xb098 ) {
2983                                 return "\xe3\x84\xb1";
2984                         } elseif ( $code < 0xb2e4 ) {
2985                                 return "\xe3\x84\xb4";
2986                         } elseif ( $code < 0xb77c ) {
2987                                 return "\xe3\x84\xb7";
2988                         } elseif ( $code < 0xb9c8 ) {
2989                                 return "\xe3\x84\xb9";
2990                         } elseif ( $code < 0xbc14 ) {
2991                                 return "\xe3\x85\x81";
2992                         } elseif ( $code < 0xc0ac ) {
2993                                 return "\xe3\x85\x82";
2994                         } elseif ( $code < 0xc544 ) {
2995                                 return "\xe3\x85\x85";
2996                         } elseif ( $code < 0xc790 ) {
2997                                 return "\xe3\x85\x87";
2998                         } elseif ( $code < 0xcc28 ) {
2999                                 return "\xe3\x85\x88";
3000                         } elseif ( $code < 0xce74 ) {
3001                                 return "\xe3\x85\x8a";
3002                         } elseif ( $code < 0xd0c0 ) {
3003                                 return "\xe3\x85\x8b";
3004                         } elseif ( $code < 0xd30c ) {
3005                                 return "\xe3\x85\x8c";
3006                         } elseif ( $code < 0xd558 ) {
3007                                 return "\xe3\x85\x8d";
3008                         } else {
3009                                 return "\xe3\x85\x8e";
3010                         }
3011                 } else {
3012                         return '';
3013                 }
3014         }
3015
3016         function initEncoding() {
3017                 # Some languages may have an alternate char encoding option
3018                 # (Esperanto X-coding, Japanese furigana conversion, etc)
3019                 # If this language is used as the primary content language,
3020                 # an override to the defaults can be set here on startup.
3021         }
3022
3023         /**
3024          * @param string $s
3025          * @return string
3026          */
3027         function recodeForEdit( $s ) {
3028                 # For some languages we'll want to explicitly specify
3029                 # which characters make it into the edit box raw
3030                 # or are converted in some way or another.
3031                 global $wgEditEncoding;
3032                 if ( $wgEditEncoding == '' || $wgEditEncoding == 'UTF-8' ) {
3033                         return $s;
3034                 } else {
3035                         return $this->iconv( 'UTF-8', $wgEditEncoding, $s );
3036                 }
3037         }
3038
3039         /**
3040          * @param string $s
3041          * @return string
3042          */
3043         function recodeInput( $s ) {
3044                 # Take the previous into account.
3045                 global $wgEditEncoding;
3046                 if ( $wgEditEncoding != '' ) {
3047                         $enc = $wgEditEncoding;
3048                 } else {
3049                         $enc = 'UTF-8';
3050                 }
3051                 if ( $enc == 'UTF-8' ) {
3052                         return $s;
3053                 } else {
3054                         return $this->iconv( $enc, 'UTF-8', $s );
3055                 }
3056         }
3057
3058         /**
3059          * Convert a UTF-8 string to normal form C. In Malayalam and Arabic, this
3060          * also cleans up certain backwards-compatible sequences, converting them
3061          * to the modern Unicode equivalent.
3062          *
3063          * This is language-specific for performance reasons only.
3064          *
3065          * @param string $s
3066          *
3067          * @return string
3068          */
3069         function normalize( $s ) {
3070                 global $wgAllUnicodeFixes;
3071                 $s = UtfNormal\Validator::cleanUp( $s );
3072                 if ( $wgAllUnicodeFixes ) {
3073                         $s = $this->transformUsingPairFile( 'normalize-ar.ser', $s );
3074                         $s = $this->transformUsingPairFile( 'normalize-ml.ser', $s );
3075                 }
3076
3077                 return $s;
3078         }
3079
3080         /**
3081          * Transform a string using serialized data stored in the given file (which
3082          * must be in the serialized subdirectory of $IP). The file contains pairs
3083          * mapping source characters to destination characters.
3084          *
3085          * The data is cached in process memory. This will go faster if you have the
3086          * FastStringSearch extension.
3087          *
3088          * @param string $file
3089          * @param string $string
3090          *
3091          * @throws MWException
3092          * @return string
3093          */
3094         function transformUsingPairFile( $file, $string ) {
3095                 if ( !isset( $this->transformData[$file] ) ) {
3096                         $data = wfGetPrecompiledData( $file );
3097                         if ( $data === false ) {
3098                                 throw new MWException( __METHOD__ . ": The transformation file $file is missing" );
3099                         }
3100                         $this->transformData[$file] = new ReplacementArray( $data );
3101                 }
3102                 return $this->transformData[$file]->replace( $string );
3103         }
3104
3105         /**
3106          * For right-to-left language support
3107          *
3108          * @return bool
3109          */
3110         function isRTL() {
3111                 return self::$dataCache->getItem( $this->mCode, 'rtl' );
3112         }
3113
3114         /**
3115          * Return the correct HTML 'dir' attribute value for this language.
3116          * @return string
3117          */
3118         function getDir() {
3119                 return $this->isRTL() ? 'rtl' : 'ltr';
3120         }
3121
3122         /**
3123          * Return 'left' or 'right' as appropriate alignment for line-start
3124          * for this language's text direction.
3125          *
3126          * Should be equivalent to CSS3 'start' text-align value....
3127          *
3128          * @return string
3129          */
3130         function alignStart() {
3131                 return $this->isRTL() ? 'right' : 'left';
3132         }
3133
3134         /**
3135          * Return 'right' or 'left' as appropriate alignment for line-end
3136          * for this language's text direction.
3137          *
3138          * Should be equivalent to CSS3 'end' text-align value....
3139          *
3140          * @return string
3141          */
3142         function alignEnd() {
3143                 return $this->isRTL() ? 'left' : 'right';
3144         }
3145
3146         /**
3147          * A hidden direction mark (LRM or RLM), depending on the language direction.
3148          * Unlike getDirMark(), this function returns the character as an HTML entity.
3149          * This function should be used when the output is guaranteed to be HTML,
3150          * because it makes the output HTML source code more readable. When
3151          * the output is plain text or can be escaped, getDirMark() should be used.
3152          *
3153          * @param bool $opposite Get the direction mark opposite to your language
3154          * @return string
3155          * @since 1.20
3156          */
3157         function getDirMarkEntity( $opposite = false ) {
3158                 if ( $opposite ) {
3159                         return $this->isRTL() ? '&lrm;' : '&rlm;';
3160                 }
3161                 return $this->isRTL() ? '&rlm;' : '&lrm;';
3162         }
3163
3164         /**
3165          * A hidden direction mark (LRM or RLM), depending on the language direction.
3166          * This function produces them as invisible Unicode characters and
3167          * the output may be hard to read and debug, so it should only be used
3168          * when the output is plain text or can be escaped. When the output is
3169          * HTML, use getDirMarkEntity() instead.
3170          *
3171          * @param bool $opposite Get the direction mark opposite to your language
3172          * @return string
3173          */
3174         function getDirMark( $opposite = false ) {
3175                 $lrm = "\xE2\x80\x8E"; # LEFT-TO-RIGHT MARK, commonly abbreviated LRM
3176                 $rlm = "\xE2\x80\x8F"; # RIGHT-TO-LEFT MARK, commonly abbreviated RLM
3177                 if ( $opposite ) {
3178                         return $this->isRTL() ? $lrm : $rlm;
3179                 }
3180                 return $this->isRTL() ? $rlm : $lrm;
3181         }
3182
3183         /**
3184          * @return array
3185          */
3186         function capitalizeAllNouns() {
3187                 return self::$dataCache->getItem( $this->mCode, 'capitalizeAllNouns' );
3188         }
3189
3190         /**
3191          * An arrow, depending on the language direction.
3192          *
3193          * @param string $direction The direction of the arrow: forwards (default),
3194          *   backwards, left, right, up, down.
3195          * @return string
3196          */
3197         function getArrow( $direction = 'forwards' ) {
3198                 switch ( $direction ) {
3199                 case 'forwards':
3200                         return $this->isRTL() ? '←' : '→';
3201                 case 'backwards':
3202                         return $this->isRTL() ? '→' : '←';
3203                 case 'left':
3204                         return '←';
3205                 case 'right':
3206                         return '→';
3207                 case 'up':
3208                         return '↑';
3209                 case 'down':
3210                         return '↓';
3211                 }
3212         }
3213
3214         /**
3215          * To allow "foo[[bar]]" to extend the link over the whole word "foobar"
3216          *
3217          * @return bool
3218          */
3219         function linkPrefixExtension() {
3220                 return self::$dataCache->getItem( $this->mCode, 'linkPrefixExtension' );
3221         }
3222
3223         /**
3224          * Get all magic words from cache.
3225          * @return array
3226          */
3227         function getMagicWords() {
3228                 return self::$dataCache->getItem( $this->mCode, 'magicWords' );
3229         }
3230
3231         /**
3232          * Run the LanguageGetMagic hook once.
3233          */
3234         protected function doMagicHook() {
3235                 if ( $this->mMagicHookDone ) {
3236                         return;
3237                 }
3238                 $this->mMagicHookDone = true;
3239                 Hooks::run( 'LanguageGetMagic', [ &$this->mMagicExtensions, $this->getCode() ] );
3240         }
3241
3242         /**
3243          * Fill a MagicWord object with data from here
3244          *
3245          * @param MagicWord $mw
3246          */
3247         function getMagic( $mw ) {
3248                 // Saves a function call
3249                 if ( !$this->mMagicHookDone ) {
3250                         $this->doMagicHook();
3251                 }
3252
3253                 if ( isset( $this->mMagicExtensions[$mw->mId] ) ) {
3254                         $rawEntry = $this->mMagicExtensions[$mw->mId];
3255                 } else {
3256                         $rawEntry = self::$dataCache->getSubitem(
3257                                 $this->mCode, 'magicWords', $mw->mId );
3258                 }
3259
3260                 if ( !is_array( $rawEntry ) ) {
3261                         wfWarn( "\"$rawEntry\" is not a valid magic word for \"$mw->mId\"" );
3262                 } else {
3263                         $mw->mCaseSensitive = $rawEntry[0];
3264                         $mw->mSynonyms = array_slice( $rawEntry, 1 );
3265                 }
3266         }
3267
3268         /**
3269          * Add magic words to the extension array
3270          *
3271          * @param array $newWords
3272          */
3273         function addMagicWordsByLang( $newWords ) {
3274                 $fallbackChain = $this->getFallbackLanguages();
3275                 $fallbackChain = array_reverse( $fallbackChain );
3276                 foreach ( $fallbackChain as $code ) {
3277                         if ( isset( $newWords[$code] ) ) {
3278                                 $this->mMagicExtensions = $newWords[$code] + $this->mMagicExtensions;
3279                         }
3280                 }
3281         }
3282
3283         /**
3284          * Get special page names, as an associative array
3285          *   canonical name => array of valid names, including aliases
3286          * @return array
3287          */
3288         function getSpecialPageAliases() {
3289                 // Cache aliases because it may be slow to load them
3290                 if ( is_null( $this->mExtendedSpecialPageAliases ) ) {
3291                         // Initialise array
3292                         $this->mExtendedSpecialPageAliases =
3293                                 self::$dataCache->getItem( $this->mCode, 'specialPageAliases' );
3294                         Hooks::run( 'LanguageGetSpecialPageAliases',
3295                                 [ &$this->mExtendedSpecialPageAliases, $this->getCode() ] );
3296                 }
3297
3298                 return $this->mExtendedSpecialPageAliases;
3299         }
3300
3301         /**
3302          * Italic is unsuitable for some languages
3303          *
3304          * @param string $text The text to be emphasized.
3305          * @return string
3306          */
3307         function emphasize( $text ) {
3308                 return "<em>$text</em>";
3309         }
3310
3311         /**
3312          * Normally we output all numbers in plain en_US style, that is
3313          * 293,291.235 for twohundredninetythreethousand-twohundredninetyone
3314          * point twohundredthirtyfive. However this is not suitable for all
3315          * languages, some such as Punjabi want ੨੯੩,੨੯੫.੨੩੫ and others such as
3316          * Icelandic just want to use commas instead of dots, and dots instead
3317          * of commas like "293.291,235".
3318          *
3319          * An example of this function being called:
3320          * <code>
3321          * wfMessage( 'message' )->numParams( $num )->text()
3322          * </code>
3323          *
3324          * See $separatorTransformTable on MessageIs.php for
3325          * the , => . and . => , implementation.
3326          *
3327          * @todo check if it's viable to use localeconv() for the decimal separator thing.
3328          * @param int|float $number The string to be formatted, should be an integer
3329          *   or a floating point number.
3330          * @param bool $nocommafy Set to true for special numbers like dates
3331          * @return string
3332          */
3333         public function formatNum( $number, $nocommafy = false ) {
3334                 global $wgTranslateNumerals;
3335                 if ( !$nocommafy ) {
3336                         $number = $this->commafy( $number );
3337                         $s = $this->separatorTransformTable();
3338                         if ( $s ) {
3339                                 $number = strtr( $number, $s );
3340                         }
3341                 }
3342
3343                 if ( $wgTranslateNumerals ) {
3344                         $s = $this->digitTransformTable();
3345                         if ( $s ) {
3346                                 $number = strtr( $number, $s );
3347                         }
3348                 }
3349
3350                 return $number;
3351         }
3352
3353         /**
3354          * Front-end for non-commafied formatNum
3355          *
3356          * @param int|float $number The string to be formatted, should be an integer
3357          *        or a floating point number.
3358          * @since 1.21
3359          * @return string
3360          */
3361         public function formatNumNoSeparators( $number ) {
3362                 return $this->formatNum( $number, true );
3363         }
3364
3365         /**
3366          * @param string $number
3367          * @return string
3368          */
3369         public function parseFormattedNumber( $number ) {
3370                 $s = $this->digitTransformTable();
3371                 if ( $s ) {
3372                         // eliminate empty array values such as ''. (bug 64347)
3373                         $s = array_filter( $s );
3374                         $number = strtr( $number, array_flip( $s ) );
3375                 }
3376
3377                 $s = $this->separatorTransformTable();
3378                 if ( $s ) {
3379                         // eliminate empty array values such as ''. (bug 64347)
3380                         $s = array_filter( $s );
3381                         $number = strtr( $number, array_flip( $s ) );
3382                 }
3383
3384                 $number = strtr( $number, [ ',' => '' ] );
3385                 return $number;
3386         }
3387
3388         /**
3389          * Adds commas to a given number
3390          * @since 1.19
3391          * @param mixed $number
3392          * @return string
3393          */
3394         function commafy( $number ) {
3395                 $digitGroupingPattern = $this->digitGroupingPattern();
3396                 if ( $number === null ) {
3397                         return '';
3398                 }
3399
3400                 if ( !$digitGroupingPattern || $digitGroupingPattern === "###,###,###" ) {
3401                         // default grouping is at thousands,  use the same for ###,###,### pattern too.
3402                         return strrev( (string)preg_replace( '/(\d{3})(?=\d)(?!\d*\.)/', '$1,', strrev( $number ) ) );
3403                 } else {
3404                         // Ref: http://cldr.unicode.org/translation/number-patterns
3405                         $sign = "";
3406                         if ( intval( $number ) < 0 ) {
3407                                 // For negative numbers apply the algorithm like positive number and add sign.
3408                                 $sign = "-";
3409                                 $number = substr( $number, 1 );
3410                         }
3411                         $integerPart = [];
3412                         $decimalPart = [];
3413                         $numMatches = preg_match_all( "/(#+)/", $digitGroupingPattern, $matches );
3414                         preg_match( "/\d+/", $number, $integerPart );
3415                         preg_match( "/\.\d*/", $number, $decimalPart );
3416                         $groupedNumber = ( count( $decimalPart ) > 0 ) ? $decimalPart[0] : "";
3417                         if ( $groupedNumber === $number ) {
3418                                 // the string does not have any number part. Eg: .12345
3419                                 return $sign . $groupedNumber;
3420                         }
3421                         $start = $end = ( $integerPart ) ? strlen( $integerPart[0] ) : 0;
3422                         while ( $start > 0 ) {
3423                                 $match = $matches[0][$numMatches - 1];
3424                                 $matchLen = strlen( $match );
3425                                 $start = $end - $matchLen;
3426                                 if ( $start < 0 ) {
3427                                         $start = 0;
3428                                 }
3429                                 $groupedNumber = substr( $number, $start, $end -$start ) . $groupedNumber;
3430                                 $end = $start;
3431                                 if ( $numMatches > 1 ) {
3432                                         // use the last pattern for the rest of the number
3433                                         $numMatches--;
3434                                 }
3435                                 if ( $start > 0 ) {
3436                                         $groupedNumber = "," . $groupedNumber;
3437                                 }
3438                         }
3439                         return $sign . $groupedNumber;
3440                 }
3441         }
3442
3443         /**
3444          * @return string
3445          */
3446         function digitGroupingPattern() {
3447                 return self::$dataCache->getItem( $this->mCode, 'digitGroupingPattern' );
3448         }
3449
3450         /**
3451          * @return array
3452          */
3453         function digitTransformTable() {
3454                 return self::$dataCache->getItem( $this->mCode, 'digitTransformTable' );
3455         }
3456
3457         /**
3458          * @return array
3459          */
3460         function separatorTransformTable() {
3461                 return self::$dataCache->getItem( $this->mCode, 'separatorTransformTable' );
3462         }
3463
3464         /**
3465          * Take a list of strings and build a locale-friendly comma-separated
3466          * list, using the local comma-separator message.
3467          * The last two strings are chained with an "and".
3468          * NOTE: This function will only work with standard numeric array keys (0, 1, 2…)
3469          *
3470          * @param string[] $l
3471          * @return string
3472          */
3473         function listToText( array $l ) {
3474                 $m = count( $l ) - 1;
3475                 if ( $m < 0 ) {
3476                         return '';
3477                 }
3478                 if ( $m > 0 ) {
3479                         $and = $this->msg( 'and' )->escaped();
3480                         $space = $this->msg( 'word-separator' )->escaped();
3481                         if ( $m > 1 ) {
3482                                 $comma = $this->msg( 'comma-separator' )->escaped();
3483                         }
3484                 }
3485                 $s = $l[$m];
3486                 for ( $i = $m - 1; $i >= 0; $i-- ) {
3487                         if ( $i == $m - 1 ) {
3488                                 $s = $l[$i] . $and . $space . $s;
3489                         } else {
3490                                 $s = $l[$i] . $comma . $s;
3491                         }
3492                 }
3493                 return $s;
3494         }
3495
3496         /**
3497          * Take a list of strings and build a locale-friendly comma-separated
3498          * list, using the local comma-separator message.
3499          * @param string[] $list Array of strings to put in a comma list
3500          * @return string
3501          */
3502         function commaList( array $list ) {
3503                 return implode(
3504                         wfMessage( 'comma-separator' )->inLanguage( $this )->escaped(),
3505                         $list
3506                 );
3507         }
3508
3509         /**
3510          * Take a list of strings and build a locale-friendly semicolon-separated
3511          * list, using the local semicolon-separator message.
3512          * @param string[] $list Array of strings to put in a semicolon list
3513          * @return string
3514          */
3515         function semicolonList( array $list ) {
3516                 return implode(
3517                         wfMessage( 'semicolon-separator' )->inLanguage( $this )->escaped(),
3518                         $list
3519                 );
3520         }
3521
3522         /**
3523          * Same as commaList, but separate it with the pipe instead.
3524          * @param string[] $list Array of strings to put in a pipe list
3525          * @return string
3526          */
3527         function pipeList( array $list ) {
3528                 return implode(
3529                         wfMessage( 'pipe-separator' )->inLanguage( $this )->escaped(),
3530                         $list
3531                 );
3532         }
3533
3534         /**
3535          * Truncate a string to a specified length in bytes, appending an optional
3536          * string (e.g. for ellipses)
3537          *
3538          * The database offers limited byte lengths for some columns in the database;
3539          * multi-byte character sets mean we need to ensure that only whole characters
3540          * are included, otherwise broken characters can be passed to the user
3541          *
3542          * If $length is negative, the string will be truncated from the beginning
3543          *
3544          * @param string $string String to truncate
3545          * @param int $length Maximum length (including ellipses)
3546          * @param string $ellipsis String to append to the truncated text
3547          * @param bool $adjustLength Subtract length of ellipsis from $length.
3548          *      $adjustLength was introduced in 1.18, before that behaved as if false.
3549          * @return string
3550          */
3551         function truncate( $string, $length, $ellipsis = '...', $adjustLength = true ) {
3552                 # Use the localized ellipsis character
3553                 if ( $ellipsis == '...' ) {
3554                         $ellipsis = wfMessage( 'ellipsis' )->inLanguage( $this )->escaped();
3555                 }
3556                 # Check if there is no need to truncate
3557                 if ( $length == 0 ) {
3558                         return $ellipsis; // convention
3559                 } elseif ( strlen( $string ) <= abs( $length ) ) {
3560                         return $string; // no need to truncate
3561                 }
3562                 $stringOriginal = $string;
3563                 # If ellipsis length is >= $length then we can't apply $adjustLength
3564                 if ( $adjustLength && strlen( $ellipsis ) >= abs( $length ) ) {
3565                         $string = $ellipsis; // this can be slightly unexpected
3566                 # Otherwise, truncate and add ellipsis...
3567                 } else {
3568                         $eLength = $adjustLength ? strlen( $ellipsis ) : 0;
3569                         if ( $length > 0 ) {
3570                                 $length -= $eLength;
3571                                 $string = substr( $string, 0, $length ); // xyz...
3572                                 $string = $this->removeBadCharLast( $string );
3573                                 $string = rtrim( $string );
3574                                 $string = $string . $ellipsis;
3575                         } else {
3576                                 $length += $eLength;
3577                                 $string = substr( $string, $length ); // ...xyz
3578                                 $string = $this->removeBadCharFirst( $string );
3579                                 $string = ltrim( $string );
3580                                 $string = $ellipsis . $string;
3581                         }
3582                 }
3583                 # Do not truncate if the ellipsis makes the string longer/equal (bug 22181).
3584                 # This check is *not* redundant if $adjustLength, due to the single case where
3585                 # LEN($ellipsis) > ABS($limit arg); $stringOriginal could be shorter than $string.
3586                 if ( strlen( $string ) < strlen( $stringOriginal ) ) {
3587                         return $string;
3588                 } else {
3589                         return $stringOriginal;
3590                 }
3591         }
3592
3593         /**
3594          * Remove bytes that represent an incomplete Unicode character
3595          * at the end of string (e.g. bytes of the char are missing)
3596          *
3597          * @param string $string
3598          * @return string
3599          */
3600         protected function removeBadCharLast( $string ) {
3601                 if ( $string != '' ) {
3602                         $char = ord( $string[strlen( $string ) - 1] );
3603                         $m = [];
3604                         if ( $char >= 0xc0 ) {
3605                                 # We got the first byte only of a multibyte char; remove it.
3606                                 $string = substr( $string, 0, -1 );
3607                         } elseif ( $char >= 0x80 &&
3608                                 // Use the /s modifier (PCRE_DOTALL) so (.*) also matches newlines
3609                                 preg_match( '/^(.*)(?:[\xe0-\xef][\x80-\xbf]|' .
3610                                         '[\xf0-\xf7][\x80-\xbf]{1,2})$/s', $string, $m )
3611                         ) {
3612                                 # We chopped in the middle of a character; remove it
3613                                 $string = $m[1];
3614                         }
3615                 }
3616                 return $string;
3617         }
3618
3619         /**
3620          * Remove bytes that represent an incomplete Unicode character
3621          * at the start of string (e.g. bytes of the char are missing)
3622          *
3623          * @param string $string
3624          * @return string
3625          */
3626         protected function removeBadCharFirst( $string ) {
3627                 if ( $string != '' ) {
3628                         $char = ord( $string[0] );
3629                         if ( $char >= 0x80 && $char < 0xc0 ) {
3630                                 # We chopped in the middle of a character; remove the whole thing
3631                                 $string = preg_replace( '/^[\x80-\xbf]+/', '', $string );
3632                         }
3633                 }
3634                 return $string;
3635         }
3636
3637         /**
3638          * Truncate a string of valid HTML to a specified length in bytes,
3639          * appending an optional string (e.g. for ellipses), and return valid HTML
3640          *
3641          * This is only intended for styled/linked text, such as HTML with
3642          * tags like <span> and <a>, were the tags are self-contained (valid HTML).
3643          * Also, this will not detect things like "display:none" CSS.
3644          *
3645          * Note: since 1.18 you do not need to leave extra room in $length for ellipses.
3646          *
3647          * @param string $text HTML string to truncate
3648          * @param int $length (zero/positive) Maximum length (including ellipses)
3649          * @param string $ellipsis String to append to the truncated text
3650          * @return string
3651          */
3652         function truncateHtml( $text, $length, $ellipsis = '...' ) {
3653                 # Use the localized ellipsis character
3654                 if ( $ellipsis == '...' ) {
3655                         $ellipsis = wfMessage( 'ellipsis' )->inLanguage( $this )->escaped();
3656                 }
3657                 # Check if there is clearly no need to truncate
3658                 if ( $length <= 0 ) {
3659                         return $ellipsis; // no text shown, nothing to format (convention)
3660                 } elseif ( strlen( $text ) <= $length ) {
3661                         return $text; // string short enough even *with* HTML (short-circuit)
3662                 }
3663
3664                 $dispLen = 0; // innerHTML legth so far
3665                 $testingEllipsis = false; // checking if ellipses will make string longer/equal?
3666                 $tagType = 0; // 0-open, 1-close
3667                 $bracketState = 0; // 1-tag start, 2-tag name, 0-neither
3668                 $entityState = 0; // 0-not entity, 1-entity
3669                 $tag = $ret = ''; // accumulated tag name, accumulated result string
3670                 $openTags = []; // open tag stack
3671                 $maybeState = null; // possible truncation state
3672
3673                 $textLen = strlen( $text );
3674                 $neLength = max( 0, $length - strlen( $ellipsis ) ); // non-ellipsis len if truncated
3675                 for ( $pos = 0; true; ++$pos ) {
3676                         # Consider truncation once the display length has reached the maximim.
3677                         # We check if $dispLen > 0 to grab tags for the $neLength = 0 case.
3678                         # Check that we're not in the middle of a bracket/entity...
3679                         if ( $dispLen && $dispLen >= $neLength && $bracketState == 0 && !$entityState ) {
3680                                 if ( !$testingEllipsis ) {
3681                                         $testingEllipsis = true;
3682                                         # Save where we are; we will truncate here unless there turn out to
3683                                         # be so few remaining characters that truncation is not necessary.
3684                                         if ( !$maybeState ) { // already saved? ($neLength = 0 case)
3685                                                 $maybeState = [ $ret, $openTags ]; // save state
3686                                         }
3687                                 } elseif ( $dispLen > $length && $dispLen > strlen( $ellipsis ) ) {
3688                                         # String in fact does need truncation, the truncation point was OK.
3689                                         list( $ret, $openTags ) = $maybeState; // reload state
3690                                         $ret = $this->removeBadCharLast( $ret ); // multi-byte char fix
3691                                         $ret .= $ellipsis; // add ellipsis
3692                                         break;
3693                                 }
3694                         }
3695                         if ( $pos >= $textLen ) {
3696                                 break; // extra iteration just for above checks
3697                         }
3698
3699                         # Read the next char...
3700                         $ch = $text[$pos];
3701                         $lastCh = $pos ? $text[$pos - 1] : '';
3702                         $ret .= $ch; // add to result string
3703                         if ( $ch == '<' ) {
3704                                 $this->truncate_endBracket( $tag, $tagType, $lastCh, $openTags ); // for bad HTML
3705                                 $entityState = 0; // for bad HTML
3706                                 $bracketState = 1; // tag started (checking for backslash)
3707                         } elseif ( $ch == '>' ) {
3708                                 $this->truncate_endBracket( $tag, $tagType, $lastCh, $openTags );
3709                                 $entityState = 0; // for bad HTML
3710                                 $bracketState = 0; // out of brackets
3711                         } elseif ( $bracketState == 1 ) {
3712                                 if ( $ch == '/' ) {
3713                                         $tagType = 1; // close tag (e.g. "</span>")
3714                                 } else {
3715                                         $tagType = 0; // open tag (e.g. "<span>")
3716                                         $tag .= $ch;
3717                                 }
3718                                 $bracketState = 2; // building tag name
3719                         } elseif ( $bracketState == 2 ) {
3720                                 if ( $ch != ' ' ) {
3721                                         $tag .= $ch;
3722                                 } else {
3723                                         // Name found (e.g. "<a href=..."), add on tag attributes...
3724                                         $pos += $this->truncate_skip( $ret, $text, "<>", $pos + 1 );
3725                                 }
3726                         } elseif ( $bracketState == 0 ) {
3727                                 if ( $entityState ) {
3728                                         if ( $ch == ';' ) {
3729                                                 $entityState = 0;
3730                                                 $dispLen++; // entity is one displayed char
3731                                         }
3732                                 } else {
3733                                         if ( $neLength == 0 && !$maybeState ) {
3734                                                 // Save state without $ch. We want to *hit* the first
3735                                                 // display char (to get tags) but not *use* it if truncating.
3736                                                 $maybeState = [ substr( $ret, 0, -1 ), $openTags ];
3737                                         }
3738                                         if ( $ch == '&' ) {
3739                                                 $entityState = 1; // entity found, (e.g. "&#160;")
3740                                         } else {
3741                                                 $dispLen++; // this char is displayed
3742                                                 // Add the next $max display text chars after this in one swoop...
3743                                                 $max = ( $testingEllipsis ? $length : $neLength ) - $dispLen;
3744                                                 $skipped = $this->truncate_skip( $ret, $text, "<>&", $pos + 1, $max );
3745                                                 $dispLen += $skipped;
3746                                                 $pos += $skipped;
3747                                         }
3748                                 }
3749                         }
3750                 }
3751                 // Close the last tag if left unclosed by bad HTML
3752                 $this->truncate_endBracket( $tag, $text[$textLen - 1], $tagType, $openTags );
3753                 while ( count( $openTags ) > 0 ) {
3754                         $ret .= '</' . array_pop( $openTags ) . '>'; // close open tags
3755                 }
3756                 return $ret;
3757         }
3758
3759         /**
3760          * truncateHtml() helper function
3761          * like strcspn() but adds the skipped chars to $ret
3762          *
3763          * @param string $ret
3764          * @param string $text
3765          * @param string $search
3766          * @param int $start
3767          * @param null|int $len
3768          * @return int
3769          */
3770         private function truncate_skip( &$ret, $text, $search, $start, $len = null ) {
3771                 if ( $len === null ) {
3772                         $len = -1; // -1 means "no limit" for strcspn
3773                 } elseif ( $len < 0 ) {
3774                         $len = 0; // sanity
3775                 }
3776                 $skipCount = 0;
3777                 if ( $start < strlen( $text ) ) {
3778                         $skipCount = strcspn( $text, $search, $start, $len );
3779                         $ret .= substr( $text, $start, $skipCount );
3780                 }
3781                 return $skipCount;
3782         }
3783
3784         /**
3785          * truncateHtml() helper function
3786          * (a) push or pop $tag from $openTags as needed
3787          * (b) clear $tag value
3788          * @param string &$tag Current HTML tag name we are looking at
3789          * @param int $tagType (0-open tag, 1-close tag)
3790          * @param string $lastCh Character before the '>' that ended this tag
3791          * @param array &$openTags Open tag stack (not accounting for $tag)
3792          */
3793         private function truncate_endBracket( &$tag, $tagType, $lastCh, &$openTags ) {
3794                 $tag = ltrim( $tag );
3795                 if ( $tag != '' ) {
3796                         if ( $tagType == 0 && $lastCh != '/' ) {
3797                                 $openTags[] = $tag; // tag opened (didn't close itself)
3798                         } elseif ( $tagType == 1 ) {
3799                                 if ( $openTags && $tag == $openTags[count( $openTags ) - 1] ) {
3800                                         array_pop( $openTags ); // tag closed
3801                                 }
3802                         }
3803                         $tag = '';
3804                 }
3805         }
3806
3807         /**
3808          * Grammatical transformations, needed for inflected languages
3809          * Invoked by putting {{grammar:case|word}} in a message
3810          *
3811          * @param string $word
3812          * @param string $case
3813          * @return string
3814          */
3815         function convertGrammar( $word, $case ) {
3816                 global $wgGrammarForms;
3817                 if ( isset( $wgGrammarForms[$this->getCode()][$case][$word] ) ) {
3818                         return $wgGrammarForms[$this->getCode()][$case][$word];
3819                 }
3820
3821                 return $word;
3822         }
3823         /**
3824          * Get the grammar forms for the content language
3825          * @return array Array of grammar forms
3826          * @since 1.20
3827          */
3828         function getGrammarForms() {
3829                 global $wgGrammarForms;
3830                 if ( isset( $wgGrammarForms[$this->getCode()] )
3831                         && is_array( $wgGrammarForms[$this->getCode()] )
3832                 ) {
3833                         return $wgGrammarForms[$this->getCode()];
3834                 }
3835
3836                 return [];
3837         }
3838         /**
3839          * Provides an alternative text depending on specified gender.
3840          * Usage {{gender:username|masculine|feminine|unknown}}.
3841          * username is optional, in which case the gender of current user is used,
3842          * but only in (some) interface messages; otherwise default gender is used.
3843          *
3844          * If no forms are given, an empty string is returned. If only one form is
3845          * given, it will be returned unconditionally. These details are implied by
3846          * the caller and cannot be overridden in subclasses.
3847          *
3848          * If three forms are given, the default is to use the third (unknown) form.
3849          * If fewer than three forms are given, the default is to use the first (masculine) form.
3850          * These details can be overridden in subclasses.
3851          *
3852          * @param string $gender
3853          * @param array $forms
3854          *
3855          * @return string
3856          */
3857         function gender( $gender, $forms ) {
3858                 if ( !count( $forms ) ) {
3859                         return '';
3860                 }
3861                 $forms = $this->preConvertPlural( $forms, 2 );
3862                 if ( $gender === 'male' ) {
3863                         return $forms[0];
3864                 }
3865                 if ( $gender === 'female' ) {
3866                         return $forms[1];
3867                 }
3868                 return isset( $forms[2] ) ? $forms[2] : $forms[0];
3869         }
3870
3871         /**
3872          * Plural form transformations, needed for some languages.
3873          * For example, there are 3 form of plural in Russian and Polish,
3874          * depending on "count mod 10". See [[w:Plural]]
3875          * For English it is pretty simple.
3876          *
3877          * Invoked by putting {{plural:count|wordform1|wordform2}}
3878          * or {{plural:count|wordform1|wordform2|wordform3}}
3879          *
3880          * Example: {{plural:{{NUMBEROFARTICLES}}|article|articles}}
3881          *
3882          * @param int $count Non-localized number
3883          * @param array $forms Different plural forms
3884          * @return string Correct form of plural for $count in this language
3885          */
3886         function convertPlural( $count, $forms ) {
3887                 // Handle explicit n=pluralform cases
3888                 $forms = $this->handleExplicitPluralForms( $count, $forms );
3889                 if ( is_string( $forms ) ) {
3890                         return $forms;
3891                 }
3892                 if ( !count( $forms ) ) {
3893                         return '';
3894                 }
3895
3896                 $pluralForm = $this->getPluralRuleIndexNumber( $count );
3897                 $pluralForm = min( $pluralForm, count( $forms ) - 1 );
3898                 return $forms[$pluralForm];
3899         }
3900
3901         /**
3902          * Handles explicit plural forms for Language::convertPlural()
3903          *
3904          * In {{PLURAL:$1|0=nothing|one|many}}, 0=nothing will be returned if $1 equals zero.
3905          * If an explicitly defined plural form matches the $count, then
3906          * string value returned, otherwise array returned for further consideration
3907          * by CLDR rules or overridden convertPlural().
3908          *
3909          * @since 1.23
3910          *
3911          * @param int $count Non-localized number
3912          * @param array $forms Different plural forms
3913          *
3914          * @return array|string
3915          */
3916         protected function handleExplicitPluralForms( $count, array $forms ) {
3917                 foreach ( $forms as $index => $form ) {
3918                         if ( preg_match( '/\d+=/i', $form ) ) {
3919                                 $pos = strpos( $form, '=' );
3920                                 if ( substr( $form, 0, $pos ) === (string)$count ) {
3921                                         return substr( $form, $pos + 1 );
3922                                 }
3923                                 unset( $forms[$index] );
3924                         }
3925                 }
3926                 return array_values( $forms );
3927         }
3928
3929         /**
3930          * Checks that convertPlural was given an array and pads it to requested
3931          * amount of forms by copying the last one.
3932          *
3933          * @param array $forms Array of forms given to convertPlural
3934          * @param int $count How many forms should there be at least
3935          * @return array Padded array of forms or an exception if not an array
3936          */
3937         protected function preConvertPlural( /* Array */ $forms, $count ) {
3938                 while ( count( $forms ) < $count ) {
3939                         $forms[] = $forms[count( $forms ) - 1];
3940                 }
3941                 return $forms;
3942         }
3943
3944         /**
3945          * Wraps argument with unicode control characters for directionality safety
3946          *
3947          * This solves the problem where directionality-neutral characters at the edge of
3948          * the argument string get interpreted with the wrong directionality from the
3949          * enclosing context, giving renderings that look corrupted like "(Ben_(WMF".
3950          *
3951          * The wrapping is LRE...PDF or RLE...PDF, depending on the detected
3952          * directionality of the argument string, using the BIDI algorithm's own "First
3953          * strong directional codepoint" rule. Essentially, this works round the fact that
3954          * there is no embedding equivalent of U+2068 FSI (isolation with heuristic
3955          * direction inference). The latter is cleaner but still not widely supported.
3956          *
3957          * @param string $text Text to wrap
3958          * @return string Text, wrapped in LRE...PDF or RLE...PDF or nothing
3959          */
3960         public function embedBidi( $text = '' ) {
3961                 $dir = Language::strongDirFromContent( $text );
3962                 if ( $dir === 'ltr' ) {
3963                         // Wrap in LEFT-TO-RIGHT EMBEDDING ... POP DIRECTIONAL FORMATTING
3964                         return self::$lre . $text . self::$pdf;
3965                 }
3966                 if ( $dir === 'rtl' ) {
3967                         // Wrap in RIGHT-TO-LEFT EMBEDDING ... POP DIRECTIONAL FORMATTING
3968                         return self::$rle . $text . self::$pdf;
3969                 }
3970                 // No strong directionality: do not wrap
3971                 return $text;
3972         }
3973
3974         /**
3975          * @todo Maybe translate block durations.  Note that this function is somewhat misnamed: it
3976          * deals with translating the *duration* ("1 week", "4 days", etc), not the expiry time
3977          * (which is an absolute timestamp). Please note: do NOT add this blindly, as it is used
3978          * on old expiry lengths recorded in log entries. You'd need to provide the start date to
3979          * match up with it.
3980          *
3981          * @param string $str The validated block duration in English
3982          * @return string Somehow translated block duration
3983          * @see LanguageFi.php for example implementation
3984          */
3985         function translateBlockExpiry( $str ) {
3986                 $duration = SpecialBlock::getSuggestedDurations( $this );
3987                 foreach ( $duration as $show => $value ) {
3988                         if ( strcmp( $str, $value ) == 0 ) {
3989                                 return htmlspecialchars( trim( $show ) );
3990                         }
3991                 }
3992
3993                 if ( wfIsInfinity( $str ) ) {
3994                         foreach ( $duration as $show => $value ) {
3995                                 if ( wfIsInfinity( $value ) ) {
3996                                         return htmlspecialchars( trim( $show ) );
3997                                 }
3998                         }
3999                 }
4000
4001                 // If all else fails, return a standard duration or timestamp description.
4002                 $time = strtotime( $str, 0 );
4003                 if ( $time === false ) { // Unknown format. Return it as-is in case.
4004                         return $str;
4005                 } elseif ( $time !== strtotime( $str, 1 ) ) { // It's a relative timestamp.
4006                         // $time is relative to 0 so it's a duration length.
4007                         return $this->formatDuration( $time );
4008                 } else { // It's an absolute timestamp.
4009                         if ( $time === 0 ) {
4010                                 // wfTimestamp() handles 0 as current time instead of epoch.
4011                                 return $this->timeanddate( '19700101000000' );
4012                         } else {
4013                                 return $this->timeanddate( $time );
4014                         }
4015                 }
4016         }
4017
4018         /**
4019          * languages like Chinese need to be segmented in order for the diff
4020          * to be of any use
4021          *
4022          * @param string $text
4023          * @return string
4024          */
4025         public function segmentForDiff( $text ) {
4026                 return $text;
4027         }
4028
4029         /**
4030          * and unsegment to show the result
4031          *
4032          * @param string $text
4033          * @return string
4034          */
4035         public function unsegmentForDiff( $text ) {
4036                 return $text;
4037         }
4038
4039         /**
4040          * Return the LanguageConverter used in the Language
4041          *
4042          * @since 1.19
4043          * @return LanguageConverter
4044          */
4045         public function getConverter() {
4046                 return $this->mConverter;
4047         }
4048
4049         /**
4050          * convert text to all supported variants
4051          *
4052          * @param string $text
4053          * @return array
4054          */
4055         public function autoConvertToAllVariants( $text ) {
4056                 return $this->mConverter->autoConvertToAllVariants( $text );
4057         }
4058
4059         /**
4060          * convert text to different variants of a language.
4061          *
4062          * @param string $text
4063          * @return string
4064          */
4065         public function convert( $text ) {
4066                 return $this->mConverter->convert( $text );
4067         }
4068
4069         /**
4070          * Convert a Title object to a string in the preferred variant
4071          *
4072          * @param Title $title
4073          * @return string
4074          */
4075         public function convertTitle( $title ) {
4076                 return $this->mConverter->convertTitle( $title );
4077         }
4078
4079         /**
4080          * Convert a namespace index to a string in the preferred variant
4081          *
4082          * @param int $ns
4083          * @return string
4084          */
4085         public function convertNamespace( $ns ) {
4086                 return $this->mConverter->convertNamespace( $ns );
4087         }
4088
4089         /**
4090          * Check if this is a language with variants
4091          *
4092          * @return bool
4093          */
4094         public function hasVariants() {
4095                 return count( $this->getVariants() ) > 1;
4096         }
4097
4098         /**
4099          * Check if the language has the specific variant
4100          *
4101          * @since 1.19
4102          * @param string $variant
4103          * @return bool
4104          */
4105         public function hasVariant( $variant ) {
4106                 return (bool)$this->mConverter->validateVariant( $variant );
4107         }
4108
4109         /**
4110          * Perform output conversion on a string, and encode for safe HTML output.
4111          * @param string $text Text to be converted
4112          * @param bool $isTitle Whether this conversion is for the article title
4113          * @return string
4114          * @todo this should get integrated somewhere sane
4115          */
4116         public function convertHtml( $text, $isTitle = false ) {
4117                 return htmlspecialchars( $this->convert( $text, $isTitle ) );
4118         }
4119
4120         /**
4121          * @param string $key
4122          * @return string
4123          */
4124         public function convertCategoryKey( $key ) {
4125                 return $this->mConverter->convertCategoryKey( $key );
4126         }
4127
4128         /**
4129          * Get the list of variants supported by this language
4130          * see sample implementation in LanguageZh.php
4131          *
4132          * @return array An array of language codes
4133          */
4134         public function getVariants() {
4135                 return $this->mConverter->getVariants();
4136         }
4137
4138         /**
4139          * @return string
4140          */
4141         public function getPreferredVariant() {
4142                 return $this->mConverter->getPreferredVariant();
4143         }
4144
4145         /**
4146          * @return string
4147          */
4148         public function getDefaultVariant() {
4149                 return $this->mConverter->getDefaultVariant();
4150         }
4151
4152         /**
4153          * @return string
4154          */
4155         public function getURLVariant() {
4156                 return $this->mConverter->getURLVariant();
4157         }
4158
4159         /**
4160          * If a language supports multiple variants, it is
4161          * possible that non-existing link in one variant
4162          * actually exists in another variant. this function
4163          * tries to find it. See e.g. LanguageZh.php
4164          * The input parameters may be modified upon return
4165          *
4166          * @param string &$link The name of the link
4167          * @param Title &$nt The title object of the link
4168          * @param bool $ignoreOtherCond To disable other conditions when
4169          *   we need to transclude a template or update a category's link
4170          */
4171         public function findVariantLink( &$link, &$nt, $ignoreOtherCond = false ) {
4172                 $this->mConverter->findVariantLink( $link, $nt, $ignoreOtherCond );
4173         }
4174
4175         /**
4176          * returns language specific options used by User::getPageRenderHash()
4177          * for example, the preferred language variant
4178          *
4179          * @return string
4180          */
4181         function getExtraHashOptions() {
4182                 return $this->mConverter->getExtraHashOptions();
4183         }
4184
4185         /**
4186          * For languages that support multiple variants, the title of an
4187          * article may be displayed differently in different variants. this
4188          * function returns the apporiate title defined in the body of the article.
4189          *
4190          * @return string
4191          */
4192         public function getParsedTitle() {
4193                 return $this->mConverter->getParsedTitle();
4194         }
4195
4196         /**
4197          * Refresh the cache of conversion tables when
4198          * MediaWiki:Conversiontable* is updated.
4199          *
4200          * @param Title $titleobj The Title of the page being updated
4201          */
4202         public function updateConversionTable( Title $title ) {
4203                 $this->mConverter->updateConversionTable( $title );
4204         }
4205
4206         /**
4207          * Prepare external link text for conversion. When the text is
4208          * a URL, it shouldn't be converted, and it'll be wrapped in
4209          * the "raw" tag (-{R| }-) to prevent conversion.
4210          *
4211          * This function is called "markNoConversion" for historical
4212          * reasons.
4213          *
4214          * @param string $text Text to be used for external link
4215          * @param bool $noParse Wrap it without confirming it's a real URL first
4216          * @return string The tagged text
4217          */
4218         public function markNoConversion( $text, $noParse = false ) {
4219                 // Excluding protocal-relative URLs may avoid many false positives.
4220                 if ( $noParse || preg_match( '/^(?:' . wfUrlProtocolsWithoutProtRel() . ')/', $text ) ) {
4221                         return $this->mConverter->markNoConversion( $text );
4222                 } else {
4223                         return $text;
4224                 }
4225         }
4226
4227         /**
4228          * A regular expression to match legal word-trailing characters
4229          * which should be merged onto a link of the form [[foo]]bar.
4230          *
4231          * @return string
4232          */
4233         public function linkTrail() {
4234                 return self::$dataCache->getItem( $this->mCode, 'linkTrail' );
4235         }
4236
4237         /**
4238          * A regular expression character set to match legal word-prefixing
4239          * characters which should be merged onto a link of the form foo[[bar]].
4240          *
4241          * @return string
4242          */
4243         public function linkPrefixCharset() {
4244                 return self::$dataCache->getItem( $this->mCode, 'linkPrefixCharset' );
4245         }
4246
4247         /**
4248          * @deprecated since 1.24, will be removed in 1.25
4249          * @return Language
4250          */
4251         function getLangObj() {
4252                 wfDeprecated( __METHOD__, '1.24' );
4253                 return $this;
4254         }
4255
4256         /**
4257          * Get the "parent" language which has a converter to convert a "compatible" language
4258          * (in another variant) to this language (eg. zh for zh-cn, but not en for en-gb).
4259          *
4260          * @return Language|null
4261          * @since 1.22
4262          */
4263         public function getParentLanguage() {
4264                 if ( $this->mParentLanguage !== false ) {
4265                         return $this->mParentLanguage;
4266                 }
4267
4268                 $code = explode( '-', $this->getCode() )[0];
4269                 if ( !in_array( $code, LanguageConverter::$languagesWithVariants ) ) {
4270                         $this->mParentLanguage = null;
4271                         return null;
4272                 }
4273                 $lang = Language::factory( $code );
4274                 if ( !$lang->hasVariant( $this->getCode() ) ) {
4275                         $this->mParentLanguage = null;
4276                         return null;
4277                 }
4278
4279                 $this->mParentLanguage = $lang;
4280                 return $lang;
4281         }
4282
4283         /**
4284          * Get the internal language code for this language object
4285          *
4286          * NOTE: The return value of this function is NOT HTML-safe and must be escaped with
4287          * htmlspecialchars() or similar
4288          *
4289          * @return string
4290          */
4291         public function getCode() {
4292                 return $this->mCode;
4293         }
4294
4295         /**
4296          * Get the code in BCP 47 format which we can use
4297          * inside of html lang="" tags.
4298          *
4299          * NOTE: The return value of this function is NOT HTML-safe and must be escaped with
4300          * htmlspecialchars() or similar.
4301          *
4302          * @since 1.19
4303          * @return string
4304          */
4305         public function getHtmlCode() {
4306                 if ( is_null( $this->mHtmlCode ) ) {
4307                         $this->mHtmlCode = wfBCP47( $this->getCode() );
4308                 }
4309                 return $this->mHtmlCode;
4310         }
4311
4312         /**
4313          * @param string $code
4314          */
4315         public function setCode( $code ) {
4316                 $this->mCode = $code;
4317                 // Ensure we don't leave incorrect cached data lying around
4318                 $this->mHtmlCode = null;
4319                 $this->mParentLanguage = false;
4320         }
4321
4322         /**
4323          * Get the language code from a file name. Inverse of getFileName()
4324          * @param string $filename $prefix . $languageCode . $suffix
4325          * @param string $prefix Prefix before the language code
4326          * @param string $suffix Suffix after the language code
4327          * @return string Language code, or false if $prefix or $suffix isn't found
4328          */
4329         public static function getCodeFromFileName( $filename, $prefix = 'Language', $suffix = '.php' ) {
4330                 $m = null;
4331                 preg_match( '/' . preg_quote( $prefix, '/' ) . '([A-Z][a-z_]+)' .
4332                         preg_quote( $suffix, '/' ) . '/', $filename, $m );
4333                 if ( !count( $m ) ) {
4334                         return false;
4335                 }
4336                 return str_replace( '_', '-', strtolower( $m[1] ) );
4337         }
4338
4339         /**
4340          * @param string $code
4341          * @return string Name of the language class
4342          */
4343         public static function classFromCode( $code ) {
4344                 if ( $code == 'en' ) {
4345                         return 'Language';
4346                 } else {
4347                         return 'Language' . str_replace( '-', '_', ucfirst( $code ) );
4348                 }
4349         }
4350
4351         /**
4352          * Get the name of a file for a certain language code
4353          * @param string $prefix Prepend this to the filename
4354          * @param string $code Language code
4355          * @param string $suffix Append this to the filename
4356          * @throws MWException
4357          * @return string $prefix . $mangledCode . $suffix
4358          */
4359         public static function getFileName( $prefix = 'Language', $code, $suffix = '.php' ) {
4360                 if ( !self::isValidBuiltInCode( $code ) ) {
4361                         throw new MWException( "Invalid language code \"$code\"" );
4362                 }
4363
4364                 return $prefix . str_replace( '-', '_', ucfirst( $code ) ) . $suffix;
4365         }
4366
4367         /**
4368          * @param string $code
4369          * @return string
4370          */
4371         public static function getMessagesFileName( $code ) {
4372                 global $IP;
4373                 $file = self::getFileName( "$IP/languages/messages/Messages", $code, '.php' );
4374                 Hooks::run( 'Language::getMessagesFileName', [ $code, &$file ] );
4375                 return $file;
4376         }
4377
4378         /**
4379          * @param string $code
4380          * @return string
4381          * @since 1.23
4382          */
4383         public static function getJsonMessagesFileName( $code ) {
4384                 global $IP;
4385
4386                 if ( !self::isValidBuiltInCode( $code ) ) {
4387                         throw new MWException( "Invalid language code \"$code\"" );
4388                 }
4389
4390                 return "$IP/languages/i18n/$code.json";
4391         }
4392
4393         /**
4394          * Get the first fallback for a given language.
4395          *
4396          * @param string $code
4397          *
4398          * @return bool|string
4399          */
4400         public static function getFallbackFor( $code ) {
4401                 $fallbacks = self::getFallbacksFor( $code );
4402                 if ( $fallbacks ) {
4403                         return $fallbacks[0];
4404                 }
4405                 return false;
4406         }
4407
4408         /**
4409          * Get the ordered list of fallback languages.
4410          *
4411          * @since 1.19
4412          * @param string $code Language code
4413          * @return array Non-empty array, ending in "en"
4414          */
4415         public static function getFallbacksFor( $code ) {
4416                 if ( $code === 'en' || !Language::isValidBuiltInCode( $code ) ) {
4417                         return [];
4418                 }
4419                 // For unknown languages, fallbackSequence returns an empty array,
4420                 // hardcode fallback to 'en' in that case.
4421                 return self::getLocalisationCache()->getItem( $code, 'fallbackSequence' ) ?: [ 'en' ];
4422         }
4423
4424         /**
4425          * Get the ordered list of fallback languages, ending with the fallback
4426          * language chain for the site language.
4427          *
4428          * @since 1.22
4429          * @param string $code Language code
4430          * @return array Array( fallbacks, site fallbacks )
4431          */
4432         public static function getFallbacksIncludingSiteLanguage( $code ) {
4433                 global $wgLanguageCode;
4434
4435                 // Usually, we will only store a tiny number of fallback chains, so we
4436                 // keep them in static memory.
4437                 $cacheKey = "{$code}-{$wgLanguageCode}";
4438
4439                 if ( !array_key_exists( $cacheKey, self::$fallbackLanguageCache ) ) {
4440                         $fallbacks = self::getFallbacksFor( $code );
4441
4442                         // Append the site's fallback chain, including the site language itself
4443                         $siteFallbacks = self::getFallbacksFor( $wgLanguageCode );
4444                         array_unshift( $siteFallbacks, $wgLanguageCode );
4445
4446                         // Eliminate any languages already included in the chain
4447                         $siteFallbacks = array_diff( $siteFallbacks, $fallbacks );
4448
4449                         self::$fallbackLanguageCache[$cacheKey] = [ $fallbacks, $siteFallbacks ];
4450                 }
4451                 return self::$fallbackLanguageCache[$cacheKey];
4452         }
4453
4454         /**
4455          * Get all messages for a given language
4456          * WARNING: this may take a long time. If you just need all message *keys*
4457          * but need the *contents* of only a few messages, consider using getMessageKeysFor().
4458          *
4459          * @param string $code
4460          *
4461          * @return array
4462          */
4463         public static function getMessagesFor( $code ) {
4464                 return self::getLocalisationCache()->getItem( $code, 'messages' );
4465         }
4466
4467         /**
4468          * Get a message for a given language
4469          *
4470          * @param string $key
4471          * @param string $code
4472          *
4473          * @return string
4474          */
4475         public static function getMessageFor( $key, $code ) {
4476                 return self::getLocalisationCache()->getSubitem( $code, 'messages', $key );
4477         }
4478
4479         /**
4480          * Get all message keys for a given language. This is a faster alternative to
4481          * array_keys( Language::getMessagesFor( $code ) )
4482          *
4483          * @since 1.19
4484          * @param string $code Language code
4485          * @return array Array of message keys (strings)
4486          */
4487         public static function getMessageKeysFor( $code ) {
4488                 return self::getLocalisationCache()->getSubItemList( $code, 'messages' );
4489         }
4490
4491         /**
4492          * @param string $talk
4493          * @return mixed
4494          */
4495         function fixVariableInNamespace( $talk ) {
4496                 if ( strpos( $talk, '$1' ) === false ) {
4497                         return $talk;
4498                 }
4499
4500                 global $wgMetaNamespace;
4501                 $talk = str_replace( '$1', $wgMetaNamespace, $talk );
4502
4503                 # Allow grammar transformations
4504                 # Allowing full message-style parsing would make simple requests
4505                 # such as action=raw much more expensive than they need to be.
4506                 # This will hopefully cover most cases.
4507                 $talk = preg_replace_callback( '/{{grammar:(.*?)\|(.*?)}}/i',
4508                         [ &$this, 'replaceGrammarInNamespace' ], $talk );
4509                 return str_replace( ' ', '_', $talk );
4510         }
4511
4512         /**
4513          * @param string $m
4514          * @return string
4515          */
4516         function replaceGrammarInNamespace( $m ) {
4517                 return $this->convertGrammar( trim( $m[2] ), trim( $m[1] ) );
4518         }
4519
4520         /**
4521          * @throws MWException
4522          * @return array
4523          */
4524         static function getCaseMaps() {
4525                 static $wikiUpperChars, $wikiLowerChars;
4526                 if ( isset( $wikiUpperChars ) ) {
4527                         return [ $wikiUpperChars, $wikiLowerChars ];
4528                 }
4529
4530                 $arr = wfGetPrecompiledData( 'Utf8Case.ser' );
4531                 if ( $arr === false ) {
4532                         throw new MWException(
4533                                 "Utf8Case.ser is missing, please run \"make\" in the serialized directory\n" );
4534                 }
4535                 $wikiUpperChars = $arr['wikiUpperChars'];
4536                 $wikiLowerChars = $arr['wikiLowerChars'];
4537                 return [ $wikiUpperChars, $wikiLowerChars ];
4538         }
4539
4540         /**
4541          * Decode an expiry (block, protection, etc) which has come from the DB
4542          *
4543          * @param string $expiry Database expiry String
4544          * @param bool|int $format True to process using language functions, or TS_ constant
4545          *     to return the expiry in a given timestamp
4546          * @param string $inifinity If $format is not true, use this string for infinite expiry
4547          * @return string
4548          * @since 1.18
4549          */
4550         public function formatExpiry( $expiry, $format = true, $infinity = 'infinity' ) {
4551                 static $dbInfinity;
4552                 if ( $dbInfinity === null ) {
4553                         $dbInfinity = wfGetDB( DB_SLAVE )->getInfinity();
4554                 }
4555
4556                 if ( $expiry == '' || $expiry === 'infinity' || $expiry == $dbInfinity ) {
4557                         return $format === true
4558                                 ? $this->getMessageFromDB( 'infiniteblock' )
4559                                 : $infinity;
4560                 } else {
4561                         return $format === true
4562                                 ? $this->timeanddate( $expiry, /* User preference timezone */ true )
4563                                 : wfTimestamp( $format, $expiry );
4564                 }
4565         }
4566
4567         /**
4568          * @todo Document
4569          * @param int|float $seconds
4570          * @param array $format Optional
4571          *   If $format['avoid'] === 'avoidseconds': don't mention seconds if $seconds >= 1 hour.
4572          *   If $format['avoid'] === 'avoidminutes': don't mention seconds/minutes if $seconds > 48 hours.
4573          *   If $format['noabbrevs'] is true: use 'seconds' and friends instead of 'seconds-abbrev'
4574          *     and friends.
4575          *   For backwards compatibility, $format may also be one of the strings 'avoidseconds'
4576          *     or 'avoidminutes'.
4577          * @return string
4578          */
4579         function formatTimePeriod( $seconds, $format = [] ) {
4580                 if ( !is_array( $format ) ) {
4581                         $format = [ 'avoid' => $format ]; // For backwards compatibility
4582                 }
4583                 if ( !isset( $format['avoid'] ) ) {
4584                         $format['avoid'] = false;
4585                 }
4586                 if ( !isset( $format['noabbrevs'] ) ) {
4587                         $format['noabbrevs'] = false;
4588                 }
4589                 $secondsMsg = wfMessage(
4590                         $format['noabbrevs'] ? 'seconds' : 'seconds-abbrev' )->inLanguage( $this );
4591                 $minutesMsg = wfMessage(
4592                         $format['noabbrevs'] ? 'minutes' : 'minutes-abbrev' )->inLanguage( $this );
4593                 $hoursMsg = wfMessage(
4594                         $format['noabbrevs'] ? 'hours' : 'hours-abbrev' )->inLanguage( $this );
4595                 $daysMsg = wfMessage(
4596                         $format['noabbrevs'] ? 'days' : 'days-abbrev' )->inLanguage( $this );
4597
4598                 if ( round( $seconds * 10 ) < 100 ) {
4599                         $s = $this->formatNum( sprintf( "%.1f", round( $seconds * 10 ) / 10 ) );
4600                         $s = $secondsMsg->params( $s )->text();
4601                 } elseif ( round( $seconds ) < 60 ) {
4602                         $s = $this->formatNum( round( $seconds ) );
4603                         $s = $secondsMsg->params( $s )->text();
4604                 } elseif ( round( $seconds ) < 3600 ) {
4605                         $minutes = floor( $seconds / 60 );
4606                         $secondsPart = round( fmod( $seconds, 60 ) );
4607                         if ( $secondsPart == 60 ) {
4608                                 $secondsPart = 0;
4609                                 $minutes++;
4610                         }
4611                         $s = $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4612                         $s .= ' ';
4613                         $s .= $secondsMsg->params( $this->formatNum( $secondsPart ) )->text();
4614                 } elseif ( round( $seconds ) <= 2 * 86400 ) {
4615                         $hours = floor( $seconds / 3600 );
4616                         $minutes = floor( ( $seconds - $hours * 3600 ) / 60 );
4617                         $secondsPart = round( $seconds - $hours * 3600 - $minutes * 60 );
4618                         if ( $secondsPart == 60 ) {
4619                                 $secondsPart = 0;
4620                                 $minutes++;
4621                         }
4622                         if ( $minutes == 60 ) {
4623                                 $minutes = 0;
4624                                 $hours++;
4625                         }
4626                         $s = $hoursMsg->params( $this->formatNum( $hours ) )->text();
4627                         $s .= ' ';
4628                         $s .= $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4629                         if ( !in_array( $format['avoid'], [ 'avoidseconds', 'avoidminutes' ] ) ) {
4630                                 $s .= ' ' . $secondsMsg->params( $this->formatNum( $secondsPart ) )->text();
4631                         }
4632                 } else {
4633                         $days = floor( $seconds / 86400 );
4634                         if ( $format['avoid'] === 'avoidminutes' ) {
4635                                 $hours = round( ( $seconds - $days * 86400 ) / 3600 );
4636                                 if ( $hours == 24 ) {
4637                                         $hours = 0;
4638                                         $days++;
4639                                 }
4640                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4641                                 $s .= ' ';
4642                                 $s .= $hoursMsg->params( $this->formatNum( $hours ) )->text();
4643                         } elseif ( $format['avoid'] === 'avoidseconds' ) {
4644                                 $hours = floor( ( $seconds - $days * 86400 ) / 3600 );
4645                                 $minutes = round( ( $seconds - $days * 86400 - $hours * 3600 ) / 60 );
4646                                 if ( $minutes == 60 ) {
4647                                         $minutes = 0;
4648                                         $hours++;
4649                                 }
4650                                 if ( $hours == 24 ) {
4651                                         $hours = 0;
4652                                         $days++;
4653                                 }
4654                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4655                                 $s .= ' ';
4656                                 $s .= $hoursMsg->params( $this->formatNum( $hours ) )->text();
4657                                 $s .= ' ';
4658                                 $s .= $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4659                         } else {
4660                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4661                                 $s .= ' ';
4662                                 $s .= $this->formatTimePeriod( $seconds - $days * 86400, $format );
4663                         }
4664                 }
4665                 return $s;
4666         }
4667
4668         /**
4669          * Format a bitrate for output, using an appropriate
4670          * unit (bps, kbps, Mbps, Gbps, Tbps, Pbps, Ebps, Zbps or Ybps) according to
4671          *   the magnitude in question.
4672          *
4673          * This use base 1000. For base 1024 use formatSize(), for another base
4674          * see formatComputingNumbers().
4675          *
4676          * @param int $bps
4677          * @return string
4678          */
4679         function formatBitrate( $bps ) {
4680                 return $this->formatComputingNumbers( $bps, 1000, "bitrate-$1bits" );
4681         }
4682
4683         /**
4684          * @param int $size Size of the unit
4685          * @param int $boundary Size boundary (1000, or 1024 in most cases)
4686          * @param string $messageKey Message key to be uesd
4687          * @return string
4688          */
4689         function formatComputingNumbers( $size, $boundary, $messageKey ) {
4690                 if ( $size <= 0 ) {
4691                         return str_replace( '$1', $this->formatNum( $size ),
4692                                 $this->getMessageFromDB( str_replace( '$1', '', $messageKey ) )
4693                         );
4694                 }
4695                 $sizes = [ '', 'kilo', 'mega', 'giga', 'tera', 'peta', 'exa', 'zeta', 'yotta' ];
4696                 $index = 0;
4697
4698                 $maxIndex = count( $sizes ) - 1;
4699                 while ( $size >= $boundary && $index < $maxIndex ) {
4700                         $index++;
4701                         $size /= $boundary;
4702                 }
4703
4704                 // For small sizes no decimal places necessary
4705                 $round = 0;
4706                 if ( $index > 1 ) {
4707                         // For MB and bigger two decimal places are smarter
4708                         $round = 2;
4709                 }
4710                 $msg = str_replace( '$1', $sizes[$index], $messageKey );
4711
4712                 $size = round( $size, $round );
4713                 $text = $this->getMessageFromDB( $msg );
4714                 return str_replace( '$1', $this->formatNum( $size ), $text );
4715         }
4716
4717         /**
4718          * Format a size in bytes for output, using an appropriate
4719          * unit (B, KB, MB, GB, TB, PB, EB, ZB or YB) according to the magnitude in question
4720          *
4721          * This method use base 1024. For base 1000 use formatBitrate(), for
4722          * another base see formatComputingNumbers()
4723          *
4724          * @param int $size Size to format
4725          * @return string Plain text (not HTML)
4726          */
4727         function formatSize( $size ) {
4728                 return $this->formatComputingNumbers( $size, 1024, "size-$1bytes" );
4729         }
4730
4731         /**
4732          * Make a list item, used by various special pages
4733          *
4734          * @param string $page Page link
4735          * @param string $details HTML safe text between brackets
4736          * @param bool $oppositedm Add the direction mark opposite to your
4737          *   language, to display text properly
4738          * @return HTML escaped string
4739          */
4740         function specialList( $page, $details, $oppositedm = true ) {
4741                 if ( !$details ) {
4742                         return $page;
4743                 }
4744
4745                 $dirmark = ( $oppositedm ? $this->getDirMark( true ) : '' ) . $this->getDirMark();
4746                 return
4747                         $page .
4748                         $dirmark .
4749                         $this->msg( 'word-separator' )->escaped() .
4750                         $this->msg( 'parentheses' )->rawParams( $details )->escaped();
4751         }
4752
4753         /**
4754          * Generate (prev x| next x) (20|50|100...) type links for paging
4755          *
4756          * @param Title $title Title object to link
4757          * @param int $offset
4758          * @param int $limit
4759          * @param array $query Optional URL query parameter string
4760          * @param bool $atend Optional param for specified if this is the last page
4761          * @return string
4762          */
4763         public function viewPrevNext( Title $title, $offset, $limit,
4764                 array $query = [], $atend = false
4765         ) {
4766                 // @todo FIXME: Why on earth this needs one message for the text and another one for tooltip?
4767
4768                 # Make 'previous' link
4769                 $prev = wfMessage( 'prevn' )->inLanguage( $this )->title( $title )->numParams( $limit )->text();
4770                 if ( $offset > 0 ) {
4771                         $plink = $this->numLink( $title, max( $offset - $limit, 0 ), $limit,
4772                                 $query, $prev, 'prevn-title', 'mw-prevlink' );
4773                 } else {
4774                         $plink = htmlspecialchars( $prev );
4775                 }
4776
4777                 # Make 'next' link
4778                 $next = wfMessage( 'nextn' )->inLanguage( $this )->title( $title )->numParams( $limit )->text();
4779                 if ( $atend ) {
4780                         $nlink = htmlspecialchars( $next );
4781                 } else {
4782                         $nlink = $this->numLink( $title, $offset + $limit, $limit,
4783                                 $query, $next, 'nextn-title', 'mw-nextlink' );
4784                 }
4785
4786                 # Make links to set number of items per page
4787                 $numLinks = [];
4788                 foreach ( [ 20, 50, 100, 250, 500 ] as $num ) {
4789                         $numLinks[] = $this->numLink( $title, $offset, $num,
4790                                 $query, $this->formatNum( $num ), 'shown-title', 'mw-numlink' );
4791                 }
4792
4793                 return wfMessage( 'viewprevnext' )->inLanguage( $this )->title( $title
4794                         )->rawParams( $plink, $nlink, $this->pipeList( $numLinks ) )->escaped();
4795         }
4796
4797         /**
4798          * Helper function for viewPrevNext() that generates links
4799          *
4800          * @param Title $title Title object to link
4801          * @param int $offset
4802          * @param int $limit
4803          * @param array $query Extra query parameters
4804          * @param string $link Text to use for the link; will be escaped
4805          * @param string $tooltipMsg Name of the message to use as tooltip
4806          * @param string $class Value of the "class" attribute of the link
4807          * @return string HTML fragment
4808          */
4809         private function numLink( Title $title, $offset, $limit, array $query, $link,
4810                 $tooltipMsg, $class
4811         ) {
4812                 $query = [ 'limit' => $limit, 'offset' => $offset ] + $query;
4813                 $tooltip = wfMessage( $tooltipMsg )->inLanguage( $this )->title( $title )
4814                         ->numParams( $limit )->text();
4815
4816                 return Html::element( 'a', [ 'href' => $title->getLocalURL( $query ),
4817                         'title' => $tooltip, 'class' => $class ], $link );
4818         }
4819
4820         /**
4821          * Get the conversion rule title, if any.
4822          *
4823          * @return string
4824          */
4825         public function getConvRuleTitle() {
4826                 return $this->mConverter->getConvRuleTitle();
4827         }
4828
4829         /**
4830          * Get the compiled plural rules for the language
4831          * @since 1.20
4832          * @return array Associative array with plural form, and plural rule as key-value pairs
4833          */
4834         public function getCompiledPluralRules() {
4835                 $pluralRules = self::$dataCache->getItem( strtolower( $this->mCode ), 'compiledPluralRules' );
4836                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4837                 if ( !$pluralRules ) {
4838                         foreach ( $fallbacks as $fallbackCode ) {
4839                                 $pluralRules = self::$dataCache->getItem( strtolower( $fallbackCode ), 'compiledPluralRules' );
4840                                 if ( $pluralRules ) {
4841                                         break;
4842                                 }
4843                         }
4844                 }
4845                 return $pluralRules;
4846         }
4847
4848         /**
4849          * Get the plural rules for the language
4850          * @since 1.20
4851          * @return array Associative array with plural form number and plural rule as key-value pairs
4852          */
4853         public function getPluralRules() {
4854                 $pluralRules = self::$dataCache->getItem( strtolower( $this->mCode ), 'pluralRules' );
4855                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4856                 if ( !$pluralRules ) {
4857                         foreach ( $fallbacks as $fallbackCode ) {
4858                                 $pluralRules = self::$dataCache->getItem( strtolower( $fallbackCode ), 'pluralRules' );
4859                                 if ( $pluralRules ) {
4860                                         break;
4861                                 }
4862                         }
4863                 }
4864                 return $pluralRules;
4865         }
4866
4867         /**
4868          * Get the plural rule types for the language
4869          * @since 1.22
4870          * @return array Associative array with plural form number and plural rule type as key-value pairs
4871          */
4872         public function getPluralRuleTypes() {
4873                 $pluralRuleTypes = self::$dataCache->getItem( strtolower( $this->mCode ), 'pluralRuleTypes' );
4874                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4875                 if ( !$pluralRuleTypes ) {
4876                         foreach ( $fallbacks as $fallbackCode ) {
4877                                 $pluralRuleTypes = self::$dataCache->getItem( strtolower( $fallbackCode ), 'pluralRuleTypes' );
4878                                 if ( $pluralRuleTypes ) {
4879                                         break;
4880                                 }
4881                         }
4882                 }
4883                 return $pluralRuleTypes;
4884         }
4885
4886         /**
4887          * Find the index number of the plural rule appropriate for the given number
4888          * @param int $number
4889          * @return int The index number of the plural rule
4890          */
4891         public function getPluralRuleIndexNumber( $number ) {
4892                 $pluralRules = $this->getCompiledPluralRules();
4893                 $form = Evaluator::evaluateCompiled( $number, $pluralRules );
4894                 return $form;
4895         }
4896
4897         /**
4898          * Find the plural rule type appropriate for the given number
4899          * For example, if the language is set to Arabic, getPluralType(5) should
4900          * return 'few'.
4901          * @since 1.22
4902          * @param int $number
4903          * @return string The name of the plural rule type, e.g. one, two, few, many
4904          */
4905         public function getPluralRuleType( $number ) {
4906                 $index = $this->getPluralRuleIndexNumber( $number );
4907                 $pluralRuleTypes = $this->getPluralRuleTypes();
4908                 if ( isset( $pluralRuleTypes[$index] ) ) {
4909                         return $pluralRuleTypes[$index];
4910                 } else {
4911                         return 'other';
4912                 }
4913         }
4914 }