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 use CLDRPluralRuleParser\Evaluator;
  34
  35 /**
  36  * Internationalisation code
  37  * @ingroup Language
  38  */
  39 class Language {
  40         /**
  41          * @var LanguageConverter
  42          */
  43         public $mConverter;
  44
  45         public $mVariants, $mCode, $mLoaded = false;
  46         public $mMagicExtensions = [], $mMagicHookDone = false;
  47         private $mHtmlCode = null, $mParentLanguage = false;
  48
  49         public $dateFormatStrings = [];
  50         public $mExtendedSpecialPageAliases;
  51
  52         protected $namespaceNames, $mNamespaceIds, $namespaceAliases;
  53
  54         /**
  55          * ReplacementArray object caches
  56          */
  57         public $transformData = [];
  58
  59         /**
  60          * @var LocalisationCache
  61          */
  62         static public $dataCache;
  63
  64         static public $mLangObjCache = [];
  65
  66         static public $mWeekdayMsgs = [
  67                 'sunday', 'monday', 'tuesday', 'wednesday', 'thursday',
  68                 'friday', 'saturday'
  69         ];
  70
  71         static public $mWeekdayAbbrevMsgs = [
  72                 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'
  73         ];
  74
  75         static public $mMonthMsgs = [
  76                 'january', 'february', 'march', 'april', 'may_long', 'june',
  77                 'july', 'august', 'september', 'october', 'november',
  78                 'december'
  79         ];
  80         static public $mMonthGenMsgs = [
  81                 'january-gen', 'february-gen', 'march-gen', 'april-gen', 'may-gen', 'june-gen',
  82                 'july-gen', 'august-gen', 'september-gen', 'october-gen', 'november-gen',
  83                 'december-gen'
  84         ];
  85         static public $mMonthAbbrevMsgs = [
  86                 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
  87                 'sep', 'oct', 'nov', 'dec'
  88         ];
  89
  90         static public $mIranianCalendarMonthMsgs = [
  91                 'iranian-calendar-m1', 'iranian-calendar-m2', 'iranian-calendar-m3',
  92                 'iranian-calendar-m4', 'iranian-calendar-m5', 'iranian-calendar-m6',
  93                 'iranian-calendar-m7', 'iranian-calendar-m8', 'iranian-calendar-m9',
  94                 'iranian-calendar-m10', 'iranian-calendar-m11', 'iranian-calendar-m12'
  95         ];
  96
  97         static public $mHebrewCalendarMonthMsgs = [
  98                 'hebrew-calendar-m1', 'hebrew-calendar-m2', 'hebrew-calendar-m3',
  99                 'hebrew-calendar-m4', 'hebrew-calendar-m5', 'hebrew-calendar-m6',
 100                 'hebrew-calendar-m7', 'hebrew-calendar-m8', 'hebrew-calendar-m9',
 101                 'hebrew-calendar-m10', 'hebrew-calendar-m11', 'hebrew-calendar-m12',
 102                 'hebrew-calendar-m6a', 'hebrew-calendar-m6b'
 103         ];
 104
 105         static public $mHebrewCalendarMonthGenMsgs = [
 106                 'hebrew-calendar-m1-gen', 'hebrew-calendar-m2-gen', 'hebrew-calendar-m3-gen',
 107                 'hebrew-calendar-m4-gen', 'hebrew-calendar-m5-gen', 'hebrew-calendar-m6-gen',
 108                 'hebrew-calendar-m7-gen', 'hebrew-calendar-m8-gen', 'hebrew-calendar-m9-gen',
 109                 'hebrew-calendar-m10-gen', 'hebrew-calendar-m11-gen', 'hebrew-calendar-m12-gen',
 110                 'hebrew-calendar-m6a-gen', 'hebrew-calendar-m6b-gen'
 111         ];
 112
 113         static public $mHijriCalendarMonthMsgs = [
 114                 'hijri-calendar-m1', 'hijri-calendar-m2', 'hijri-calendar-m3',
 115                 'hijri-calendar-m4', 'hijri-calendar-m5', 'hijri-calendar-m6',
 116                 'hijri-calendar-m7', 'hijri-calendar-m8', 'hijri-calendar-m9',
 117                 'hijri-calendar-m10', 'hijri-calendar-m11', 'hijri-calendar-m12'
 118         ];
 119
 120         /**
 121          * @since 1.20
 122          * @var array
 123          */
 124         static public $durationIntervals = [
 125                 'millennia' => 31556952000,
 126                 'centuries' => 3155695200,
 127                 'decades' => 315569520,
 128                 'years' => 31556952, // 86400 * ( 365 + ( 24 * 3 + 25 ) / 400 )
 129                 'weeks' => 604800,
 130                 'days' => 86400,
 131                 'hours' => 3600,
 132                 'minutes' => 60,
 133                 'seconds' => 1,
 134         ];
 135
 136         /**
 137          * Cache for language fallbacks.
 138          * @see Language::getFallbacksIncludingSiteLanguage
 139          * @since 1.21
 140          * @var array
 141          */
 142         static private $fallbackLanguageCache = [];
 143
 144         /**
 145          * Cache for language names
 146          * @var HashBagOStuff|null
 147          */
 148         static private $languageNameCache;
 149
 150         /**
 151          * Unicode directional formatting characters, for embedBidi()
 152          */
 153         static private $lre = "\xE2\x80\xAA"; // U+202A LEFT-TO-RIGHT EMBEDDING
 154         static private $rle = "\xE2\x80\xAB"; // U+202B RIGHT-TO-LEFT EMBEDDING
 155         static private $pdf = "\xE2\x80\xAC"; // U+202C POP DIRECTIONAL FORMATTING
 156
 157         /**
 158          * Directionality test regex for embedBidi(). Matches the first strong directionality codepoint:
 159          * - in group 1 if it is LTR
 160          * - in group 2 if it is RTL
 161          * Does not match if there is no strong directionality codepoint.
 162          *
 163          * The form is '/(?:([strong ltr codepoint])|([strong rtl codepoint]))/u' .
 164          *
 165          * Generated by UnicodeJS (see tools/strongDir) from the UCD; see
 166          * https://git.wikimedia.org/summary/unicodejs.git .
 167          */
 168         // @codingStandardsIgnoreStart
 169         // @codeCoverageIgnoreStart
 170         static private $strongDirRegex = 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 171         // @codeCoverageIgnoreEnd
 172         // @codingStandardsIgnoreEnd
 173
 174         /**
 175          * Get a cached or new language object for a given language code
 176          * @param string $code
 177          * @return Language
 178          */
 179         static function factory( $code ) {
 180                 global $wgDummyLanguageCodes, $wgLangObjCacheSize;
 181
 182                 if ( isset( $wgDummyLanguageCodes[$code] ) ) {
 183                         $code = $wgDummyLanguageCodes[$code];
 184                 }
 185
 186                 // get the language object to process
 187                 $langObj = isset( self::$mLangObjCache[$code] )
 188                         ? self::$mLangObjCache[$code]
 189                         : self::newFromCode( $code );
 190
 191                 // merge the language object in to get it up front in the cache
 192                 self::$mLangObjCache = array_merge( [ $code => $langObj ], self::$mLangObjCache );
 193                 // get rid of the oldest ones in case we have an overflow
 194                 self::$mLangObjCache = array_slice( self::$mLangObjCache, 0, $wgLangObjCacheSize, true );
 195
 196                 return $langObj;
 197         }
 198
 199         /**
 200          * Create a language object for a given language code
 201          * @param string $code
 202          * @throws MWException
 203          * @return Language
 204          */
 205         protected static function newFromCode( $code ) {
 206                 if ( !Language::isValidCode( $code ) ) {
 207                         throw new MWException( "Invalid language code \"$code\"" );
 208                 }
 209
 210                 if ( !Language::isValidBuiltInCode( $code ) ) {
 211                         // It's not possible to customise this code with class files, so
 212                         // just return a Language object. This is to support uselang= hacks.
 213                         $lang = new Language;
 214                         $lang->setCode( $code );
 215                         return $lang;
 216                 }
 217
 218                 // Check if there is a language class for the code
 219                 $class = self::classFromCode( $code );
 220                 if ( class_exists( $class ) ) {
 221                         $lang = new $class;
 222                         return $lang;
 223                 }
 224
 225                 // Keep trying the fallback list until we find an existing class
 226                 $fallbacks = Language::getFallbacksFor( $code );
 227                 foreach ( $fallbacks as $fallbackCode ) {
 228                         if ( !Language::isValidBuiltInCode( $fallbackCode ) ) {
 229                                 throw new MWException( "Invalid fallback '$fallbackCode' in fallback sequence for '$code'" );
 230                         }
 231
 232                         $class = self::classFromCode( $fallbackCode );
 233                         if ( class_exists( $class ) ) {
 234                                 $lang = new $class;
 235                                 $lang->setCode( $code );
 236                                 return $lang;
 237                         }
 238                 }
 239
 240                 throw new MWException( "Invalid fallback sequence for language '$code'" );
 241         }
 242
 243         /**
 244          * Checks whether any localisation is available for that language tag
 245          * in MediaWiki (MessagesXx.php exists).
 246          *
 247          * @param string $code Language tag (in lower case)
 248          * @return bool Whether language is supported
 249          * @since 1.21
 250          */
 251         public static function isSupportedLanguage( $code ) {
 252                 if ( !self::isValidBuiltInCode( $code ) ) {
 253                         return false;
 254                 }
 255
 256                 if ( $code === 'qqq' ) {
 257                         return false;
 258                 }
 259
 260                 return is_readable( self::getMessagesFileName( $code ) ) ||
 261                         is_readable( self::getJsonMessagesFileName( $code ) );
 262         }
 263
 264         /**
 265          * Returns true if a language code string is a well-formed language tag
 266          * according to RFC 5646.
 267          * This function only checks well-formedness; it doesn't check that
 268          * language, script or variant codes actually exist in the repositories.
 269          *
 270          * Based on regexes by Mark Davis of the Unicode Consortium:
 271          * http://unicode.org/repos/cldr/trunk/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
 272          *
 273          * @param string $code
 274          * @param bool $lenient Whether to allow '_' as separator. The default is only '-'.
 275          *
 276          * @return bool
 277          * @since 1.21
 278          */
 279         public static function isWellFormedLanguageTag( $code, $lenient = false ) {
 280                 $alpha = '[a-z]';
 281                 $digit = '[0-9]';
 282                 $alphanum = '[a-z0-9]';
 283                 $x = 'x'; # private use singleton
 284                 $singleton = '[a-wy-z]'; # other singleton
 285                 $s = $lenient ? '[-_]' : '-';
 286
 287                 $language = "$alpha{2,8}|$alpha{2,3}$s$alpha{3}";
 288                 $script = "$alpha{4}"; # ISO 15924
 289                 $region = "(?:$alpha{2}|$digit{3})"; # ISO 3166-1 alpha-2 or UN M.49
 290                 $variant = "(?:$alphanum{5,8}|$digit$alphanum{3})";
 291                 $extension = "$singleton(?:$s$alphanum{2,8})+";
 292                 $privateUse = "$x(?:$s$alphanum{1,8})+";
 293
 294                 # Define certain grandfathered codes, since otherwise the regex is pretty useless.
 295                 # Since these are limited, this is safe even later changes to the registry --
 296                 # the only oddity is that it might change the type of the tag, and thus
 297                 # the results from the capturing groups.
 298                 # http://www.iana.org/assignments/language-subtag-registry
 299
 300                 $grandfathered = "en{$s}GB{$s}oed"
 301                         . "|i{$s}(?:ami|bnn|default|enochian|hak|klingon|lux|mingo|navajo|pwn|tao|tay|tsu)"
 302                         . "|no{$s}(?:bok|nyn)"
 303                         . "|sgn{$s}(?:BE{$s}(?:fr|nl)|CH{$s}de)"
 304                         . "|zh{$s}min{$s}nan";
 305
 306                 $variantList = "$variant(?:$s$variant)*";
 307                 $extensionList = "$extension(?:$s$extension)*";
 308
 309                 $langtag = "(?:($language)"
 310                         . "(?:$s$script)?"
 311                         . "(?:$s$region)?"
 312                         . "(?:$s$variantList)?"
 313                         . "(?:$s$extensionList)?"
 314                         . "(?:$s$privateUse)?)";
 315
 316                 # The final breakdown, with capturing groups for each of these components
 317                 # The variants, extensions, grandfathered, and private-use may have interior '-'
 318
 319                 $root = "^(?:$langtag|$privateUse|$grandfathered)$";
 320
 321                 return (bool)preg_match( "/$root/", strtolower( $code ) );
 322         }
 323
 324         /**
 325          * Returns true if a language code string is of a valid form, whether or
 326          * not it exists. This includes codes which are used solely for
 327          * customisation via the MediaWiki namespace.
 328          *
 329          * @param string $code
 330          *
 331          * @return bool
 332          */
 333         public static function isValidCode( $code ) {
 334                 static $cache = [];
 335                 if ( !isset( $cache[$code] ) ) {
 336                         // People think language codes are html safe, so enforce it.
 337                         // Ideally we should only allow a-zA-Z0-9-
 338                         // but, .+ and other chars are often used for {{int:}} hacks
 339                         // see bugs 37564, 37587, 36938
 340                         $cache[$code] =
 341                                 // Protect against path traversal
 342                                 strcspn( $code, ":/\\\000&<>'\"" ) === strlen( $code )
 343                                 && !preg_match( MediaWikiTitleCodec::getTitleInvalidRegex(), $code );
 344                 }
 345                 return $cache[$code];
 346         }
 347
 348         /**
 349          * Returns true if a language code is of a valid form for the purposes of
 350          * internal customisation of MediaWiki, via Messages*.php or *.json.
 351          *
 352          * @param string $code
 353          *
 354          * @throws MWException
 355          * @since 1.18
 356          * @return bool
 357          */
 358         public static function isValidBuiltInCode( $code ) {
 359
 360                 if ( !is_string( $code ) ) {
 361                         if ( is_object( $code ) ) {
 362                                 $addmsg = " of class " . get_class( $code );
 363                         } else {
 364                                 $addmsg = '';
 365                         }
 366                         $type = gettype( $code );
 367                         throw new MWException( __METHOD__ . " must be passed a string, $type given$addmsg" );
 368                 }
 369
 370                 return (bool)preg_match( '/^[a-z0-9-]{2,}$/', $code );
 371         }
 372
 373         /**
 374          * Returns true if a language code is an IETF tag known to MediaWiki.
 375          *
 376          * @param string $tag
 377          *
 378          * @since 1.21
 379          * @return bool
 380          */
 381         public static function isKnownLanguageTag( $tag ) {
 382                 // Quick escape for invalid input to avoid exceptions down the line
 383                 // when code tries to process tags which are not valid at all.
 384                 if ( !self::isValidBuiltInCode( $tag ) ) {
 385                         return false;
 386                 }
 387
 388                 if ( isset( MediaWiki\Languages\Data\Names::$names[$tag] )
 389                         || self::fetchLanguageName( $tag, $tag ) !== ''
 390                 ) {
 391                         return true;
 392                 }
 393
 394                 return false;
 395         }
 396
 397         /**
 398          * Get the LocalisationCache instance
 399          *
 400          * @return LocalisationCache
 401          */
 402         public static function getLocalisationCache() {
 403                 if ( is_null( self::$dataCache ) ) {
 404                         global $wgLocalisationCacheConf;
 405                         $class = $wgLocalisationCacheConf['class'];
 406                         self::$dataCache = new $class( $wgLocalisationCacheConf );
 407                 }
 408                 return self::$dataCache;
 409         }
 410
 411         function __construct() {
 412                 $this->mConverter = new FakeConverter( $this );
 413                 // Set the code to the name of the descendant
 414                 if ( get_class( $this ) == 'Language' ) {
 415                         $this->mCode = 'en';
 416                 } else {
 417                         $this->mCode = str_replace( '_', '-', strtolower( substr( get_class( $this ), 8 ) ) );
 418                 }
 419                 self::getLocalisationCache();
 420         }
 421
 422         /**
 423          * Reduce memory usage
 424          */
 425         function __destruct() {
 426                 foreach ( $this as $name => $value ) {
 427                         unset( $this->$name );
 428                 }
 429         }
 430
 431         /**
 432          * Hook which will be called if this is the content language.
 433          * Descendants can use this to register hook functions or modify globals
 434          */
 435         function initContLang() {
 436         }
 437
 438         /**
 439          * @return array
 440          * @since 1.19
 441          */
 442         public function getFallbackLanguages() {
 443                 return self::getFallbacksFor( $this->mCode );
 444         }
 445
 446         /**
 447          * Exports $wgBookstoreListEn
 448          * @return array
 449          */
 450         public function getBookstoreList() {
 451                 return self::$dataCache->getItem( $this->mCode, 'bookstoreList' );
 452         }
 453
 454         /**
 455          * Returns an array of localised namespaces indexed by their numbers. If the namespace is not
 456          * available in localised form, it will be included in English.
 457          *
 458          * @return array
 459          */
 460         public function getNamespaces() {
 461                 if ( is_null( $this->namespaceNames ) ) {
 462                         global $wgMetaNamespace, $wgMetaNamespaceTalk, $wgExtraNamespaces;
 463
 464                         $this->namespaceNames = self::$dataCache->getItem( $this->mCode, 'namespaceNames' );
 465                         $validNamespaces = MWNamespace::getCanonicalNamespaces();
 466
 467                         $this->namespaceNames = $wgExtraNamespaces + $this->namespaceNames + $validNamespaces;
 468
 469                         $this->namespaceNames[NS_PROJECT] = $wgMetaNamespace;
 470                         if ( $wgMetaNamespaceTalk ) {
 471                                 $this->namespaceNames[NS_PROJECT_TALK] = $wgMetaNamespaceTalk;
 472                         } else {
 473                                 $talk = $this->namespaceNames[NS_PROJECT_TALK];
 474                                 $this->namespaceNames[NS_PROJECT_TALK] =
 475                                         $this->fixVariableInNamespace( $talk );
 476                         }
 477
 478                         # Sometimes a language will be localised but not actually exist on this wiki.
 479                         foreach ( $this->namespaceNames as $key => $text ) {
 480                                 if ( !isset( $validNamespaces[$key] ) ) {
 481                                         unset( $this->namespaceNames[$key] );
 482                                 }
 483                         }
 484
 485                         # The above mixing may leave namespaces out of canonical order.
 486                         # Re-order by namespace ID number...
 487                         ksort( $this->namespaceNames );
 488
 489                         Hooks::run( 'LanguageGetNamespaces', [ &$this->namespaceNames ] );
 490                 }
 491
 492                 return $this->namespaceNames;
 493         }
 494
 495         /**
 496          * Arbitrarily set all of the namespace names at once. Mainly used for testing
 497          * @param array $namespaces Array of namespaces (id => name)
 498          */
 499         public function setNamespaces( array $namespaces ) {
 500                 $this->namespaceNames = $namespaces;
 501                 $this->mNamespaceIds = null;
 502         }
 503
 504         /**
 505          * Resets all of the namespace caches. Mainly used for testing
 506          */
 507         public function resetNamespaces() {
 508                 $this->namespaceNames = null;
 509                 $this->mNamespaceIds = null;
 510                 $this->namespaceAliases = null;
 511         }
 512
 513         /**
 514          * A convenience function that returns getNamespaces() with spaces instead of underscores
 515          * in values. Useful for producing output to be displayed e.g. in `<select>` forms.
 516          *
 517          * @return array
 518          */
 519         public function getFormattedNamespaces() {
 520                 $ns = $this->getNamespaces();
 521                 foreach ( $ns as $k => $v ) {
 522                         $ns[$k] = strtr( $v, '_', ' ' );
 523                 }
 524                 return $ns;
 525         }
 526
 527         /**
 528          * Get a namespace value by key
 529          *
 530          * <code>
 531          * $mw_ns = $wgContLang->getNsText( NS_MEDIAWIKI );
 532          * echo $mw_ns; // prints 'MediaWiki'
 533          * </code>
 534          *
 535          * @param int $index The array key of the namespace to return
 536          * @return string|bool String if the namespace value exists, otherwise false
 537          */
 538         public function getNsText( $index ) {
 539                 $ns = $this->getNamespaces();
 540                 return isset( $ns[$index] ) ? $ns[$index] : false;
 541         }
 542
 543         /**
 544          * A convenience function that returns the same thing as
 545          * getNsText() except with '_' changed to ' ', useful for
 546          * producing output.
 547          *
 548          * <code>
 549          * $mw_ns = $wgContLang->getFormattedNsText( NS_MEDIAWIKI_TALK );
 550          * echo $mw_ns; // prints 'MediaWiki talk'
 551          * </code>
 552          *
 553          * @param int $index The array key of the namespace to return
 554          * @return string Namespace name without underscores (empty string if namespace does not exist)
 555          */
 556         public function getFormattedNsText( $index ) {
 557                 $ns = $this->getNsText( $index );
 558                 return strtr( $ns, '_', ' ' );
 559         }
 560
 561         /**
 562          * Returns gender-dependent namespace alias if available.
 563          * See https://www.mediawiki.org/wiki/Manual:$wgExtraGenderNamespaces
 564          * @param int $index Namespace index
 565          * @param string $gender Gender key (male, female... )
 566          * @return string
 567          * @since 1.18
 568          */
 569         public function getGenderNsText( $index, $gender ) {
 570                 global $wgExtraGenderNamespaces;
 571
 572                 $ns = $wgExtraGenderNamespaces +
 573                         (array)self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 574
 575                 return isset( $ns[$index][$gender] ) ? $ns[$index][$gender] : $this->getNsText( $index );
 576         }
 577
 578         /**
 579          * Whether this language uses gender-dependent namespace aliases.
 580          * See https://www.mediawiki.org/wiki/Manual:$wgExtraGenderNamespaces
 581          * @return bool
 582          * @since 1.18
 583          */
 584         public function needsGenderDistinction() {
 585                 global $wgExtraGenderNamespaces, $wgExtraNamespaces;
 586                 if ( count( $wgExtraGenderNamespaces ) > 0 ) {
 587                         // $wgExtraGenderNamespaces overrides everything
 588                         return true;
 589                 } elseif ( isset( $wgExtraNamespaces[NS_USER] ) && isset( $wgExtraNamespaces[NS_USER_TALK] ) ) {
 590                         /// @todo There may be other gender namespace than NS_USER & NS_USER_TALK in the future
 591                         // $wgExtraNamespaces overrides any gender aliases specified in i18n files
 592                         return false;
 593                 } else {
 594                         // Check what is in i18n files
 595                         $aliases = self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 596                         return count( $aliases ) > 0;
 597                 }
 598         }
 599
 600         /**
 601          * Get a namespace key by value, case insensitive.
 602          * Only matches namespace names for the current language, not the
 603          * canonical ones defined in Namespace.php.
 604          *
 605          * @param string $text
 606          * @return int|bool An integer if $text is a valid value otherwise false
 607          */
 608         function getLocalNsIndex( $text ) {
 609                 $lctext = $this->lc( $text );
 610                 $ids = $this->getNamespaceIds();
 611                 return isset( $ids[$lctext] ) ? $ids[$lctext] : false;
 612         }
 613
 614         /**
 615          * @return array
 616          */
 617         public function getNamespaceAliases() {
 618                 if ( is_null( $this->namespaceAliases ) ) {
 619                         $aliases = self::$dataCache->getItem( $this->mCode, 'namespaceAliases' );
 620                         if ( !$aliases ) {
 621                                 $aliases = [];
 622                         } else {
 623                                 foreach ( $aliases as $name => $index ) {
 624                                         if ( $index === NS_PROJECT_TALK ) {
 625                                                 unset( $aliases[$name] );
 626                                                 $name = $this->fixVariableInNamespace( $name );
 627                                                 $aliases[$name] = $index;
 628                                         }
 629                                 }
 630                         }
 631
 632                         global $wgExtraGenderNamespaces;
 633                         $genders = $wgExtraGenderNamespaces +
 634                                 (array)self::$dataCache->getItem( $this->mCode, 'namespaceGenderAliases' );
 635                         foreach ( $genders as $index => $forms ) {
 636                                 foreach ( $forms as $alias ) {
 637                                         $aliases[$alias] = $index;
 638                                 }
 639                         }
 640
 641                         # Also add converted namespace names as aliases, to avoid confusion.
 642                         $convertedNames = [];
 643                         foreach ( $this->getVariants() as $variant ) {
 644                                 if ( $variant === $this->mCode ) {
 645                                         continue;
 646                                 }
 647                                 foreach ( $this->getNamespaces() as $ns => $_ ) {
 648                                         $convertedNames[$this->getConverter()->convertNamespace( $ns, $variant )] = $ns;
 649                                 }
 650                         }
 651
 652                         $this->namespaceAliases = $aliases + $convertedNames;
 653                 }
 654
 655                 return $this->namespaceAliases;
 656         }
 657
 658         /**
 659          * @return array
 660          */
 661         public function getNamespaceIds() {
 662                 if ( is_null( $this->mNamespaceIds ) ) {
 663                         global $wgNamespaceAliases;
 664                         # Put namespace names and aliases into a hashtable.
 665                         # If this is too slow, then we should arrange it so that it is done
 666                         # before caching. The catch is that at pre-cache time, the above
 667                         # class-specific fixup hasn't been done.
 668                         $this->mNamespaceIds = [];
 669                         foreach ( $this->getNamespaces() as $index => $name ) {
 670                                 $this->mNamespaceIds[$this->lc( $name )] = $index;
 671                         }
 672                         foreach ( $this->getNamespaceAliases() as $name => $index ) {
 673                                 $this->mNamespaceIds[$this->lc( $name )] = $index;
 674                         }
 675                         if ( $wgNamespaceAliases ) {
 676                                 foreach ( $wgNamespaceAliases as $name => $index ) {
 677                                         $this->mNamespaceIds[$this->lc( $name )] = $index;
 678                                 }
 679                         }
 680                 }
 681                 return $this->mNamespaceIds;
 682         }
 683
 684         /**
 685          * Get a namespace key by value, case insensitive.  Canonical namespace
 686          * names override custom ones defined for the current language.
 687          *
 688          * @param string $text
 689          * @return int|bool An integer if $text is a valid value otherwise false
 690          */
 691         public function getNsIndex( $text ) {
 692                 $lctext = $this->lc( $text );
 693                 $ns = MWNamespace::getCanonicalIndex( $lctext );
 694                 if ( $ns !== null ) {
 695                         return $ns;
 696                 }
 697                 $ids = $this->getNamespaceIds();
 698                 return isset( $ids[$lctext] ) ? $ids[$lctext] : false;
 699         }
 700
 701         /**
 702          * short names for language variants used for language conversion links.
 703          *
 704          * @param string $code
 705          * @param bool $usemsg Use the "variantname-xyz" message if it exists
 706          * @return string
 707          */
 708         public function getVariantname( $code, $usemsg = true ) {
 709                 $msg = "variantname-$code";
 710                 if ( $usemsg && wfMessage( $msg )->exists() ) {
 711                         return $this->getMessageFromDB( $msg );
 712                 }
 713                 $name = self::fetchLanguageName( $code );
 714                 if ( $name ) {
 715                         return $name; # if it's defined as a language name, show that
 716                 } else {
 717                         # otherwise, output the language code
 718                         return $code;
 719                 }
 720         }
 721
 722         /**
 723          * @return array
 724          */
 725         public function getDatePreferences() {
 726                 return self::$dataCache->getItem( $this->mCode, 'datePreferences' );
 727         }
 728
 729         /**
 730          * @return array
 731          */
 732         function getDateFormats() {
 733                 return self::$dataCache->getItem( $this->mCode, 'dateFormats' );
 734         }
 735
 736         /**
 737          * @return array|string
 738          */
 739         public function getDefaultDateFormat() {
 740                 $df = self::$dataCache->getItem( $this->mCode, 'defaultDateFormat' );
 741                 if ( $df === 'dmy or mdy' ) {
 742                         global $wgAmericanDates;
 743                         return $wgAmericanDates ? 'mdy' : 'dmy';
 744                 } else {
 745                         return $df;
 746                 }
 747         }
 748
 749         /**
 750          * @return array
 751          */
 752         public function getDatePreferenceMigrationMap() {
 753                 return self::$dataCache->getItem( $this->mCode, 'datePreferenceMigrationMap' );
 754         }
 755
 756         /**
 757          * @param string $image
 758          * @return array|null
 759          */
 760         function getImageFile( $image ) {
 761                 return self::$dataCache->getSubitem( $this->mCode, 'imageFiles', $image );
 762         }
 763
 764         /**
 765          * @return array
 766          * @since 1.24
 767          */
 768         public function getImageFiles() {
 769                 return self::$dataCache->getItem( $this->mCode, 'imageFiles' );
 770         }
 771
 772         /**
 773          * @return array
 774          */
 775         public function getExtraUserToggles() {
 776                 return (array)self::$dataCache->getItem( $this->mCode, 'extraUserToggles' );
 777         }
 778
 779         /**
 780          * @param string $tog
 781          * @return string
 782          */
 783         function getUserToggle( $tog ) {
 784                 return $this->getMessageFromDB( "tog-$tog" );
 785         }
 786
 787         /**
 788          * Get an array of language names, indexed by code.
 789          * @param null|string $inLanguage Code of language in which to return the names
 790          *              Use null for autonyms (native names)
 791          * @param string $include One of:
 792          *              'all' all available languages
 793          *              'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
 794          *              'mwfile' only if the language is in 'mw' *and* has a message file
 795          * @return array Language code => language name
 796          * @since 1.20
 797          */
 798         public static function fetchLanguageNames( $inLanguage = null, $include = 'mw' ) {
 799                 $cacheKey = $inLanguage === null ? 'null' : $inLanguage;
 800                 $cacheKey .= ":$include";
 801                 if ( self::$languageNameCache === null ) {
 802                         self::$languageNameCache = new HashBagOStuff( [ 'maxKeys' => 20 ] );
 803                 }
 804
 805                 $ret = self::$languageNameCache->get( $cacheKey );
 806                 if ( !$ret ) {
 807                         $ret = self::fetchLanguageNamesUncached( $inLanguage, $include );
 808                         self::$languageNameCache->set( $cacheKey, $ret );
 809                 }
 810                 return $ret;
 811         }
 812
 813         /**
 814          * Uncached helper for fetchLanguageNames
 815          * @param null|string $inLanguage Code of language in which to return the names
 816          *              Use null for autonyms (native names)
 817          * @param string $include One of:
 818          *              'all' all available languages
 819          *              'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
 820          *              'mwfile' only if the language is in 'mw' *and* has a message file
 821          * @return array Language code => language name
 822          */
 823         private static function fetchLanguageNamesUncached( $inLanguage = null, $include = 'mw' ) {
 824                 global $wgExtraLanguageNames;
 825
 826                 // If passed an invalid language code to use, fallback to en
 827                 if ( $inLanguage !== null && !Language::isValidCode( $inLanguage ) ) {
 828                         $inLanguage = 'en';
 829                 }
 830
 831                 $names = [];
 832
 833                 if ( $inLanguage ) {
 834                         # TODO: also include when $inLanguage is null, when this code is more efficient
 835                         Hooks::run( 'LanguageGetTranslatedLanguageNames', [ &$names, $inLanguage ] );
 836                 }
 837
 838                 $mwNames = $wgExtraLanguageNames + MediaWiki\Languages\Data\Names::$names;
 839                 foreach ( $mwNames as $mwCode => $mwName ) {
 840                         # - Prefer own MediaWiki native name when not using the hook
 841                         # - For other names just add if not added through the hook
 842                         if ( $mwCode === $inLanguage || !isset( $names[$mwCode] ) ) {
 843                                 $names[$mwCode] = $mwName;
 844                         }
 845                 }
 846
 847                 if ( $include === 'all' ) {
 848                         ksort( $names );
 849                         return $names;
 850                 }
 851
 852                 $returnMw = [];
 853                 $coreCodes = array_keys( $mwNames );
 854                 foreach ( $coreCodes as $coreCode ) {
 855                         $returnMw[$coreCode] = $names[$coreCode];
 856                 }
 857
 858                 if ( $include === 'mwfile' ) {
 859                         $namesMwFile = [];
 860                         # We do this using a foreach over the codes instead of a directory
 861                         # loop so that messages files in extensions will work correctly.
 862                         foreach ( $returnMw as $code => $value ) {
 863                                 if ( is_readable( self::getMessagesFileName( $code ) )
 864                                         || is_readable( self::getJsonMessagesFileName( $code ) )
 865                                 ) {
 866                                         $namesMwFile[$code] = $names[$code];
 867                                 }
 868                         }
 869
 870                         ksort( $namesMwFile );
 871                         return $namesMwFile;
 872                 }
 873
 874                 ksort( $returnMw );
 875                 # 'mw' option; default if it's not one of the other two options (all/mwfile)
 876                 return $returnMw;
 877         }
 878
 879         /**
 880          * @param string $code The code of the language for which to get the name
 881          * @param null|string $inLanguage Code of language in which to return the name (null for autonyms)
 882          * @param string $include 'all', 'mw' or 'mwfile'; see fetchLanguageNames()
 883          * @return string Language name or empty
 884          * @since 1.20
 885          */
 886         public static function fetchLanguageName( $code, $inLanguage = null, $include = 'all' ) {
 887                 $code = strtolower( $code );
 888                 $array = self::fetchLanguageNames( $inLanguage, $include );
 889                 return !array_key_exists( $code, $array ) ? '' : $array[$code];
 890         }
 891
 892         /**
 893          * Get a message from the MediaWiki namespace.
 894          *
 895          * @param string $msg Message name
 896          * @return string
 897          */
 898         public function getMessageFromDB( $msg ) {
 899                 return $this->msg( $msg )->text();
 900         }
 901
 902         /**
 903          * Get message object in this language. Only for use inside this class.
 904          *
 905          * @param string $msg Message name
 906          * @return Message
 907          */
 908         protected function msg( $msg ) {
 909                 return wfMessage( $msg )->inLanguage( $this );
 910         }
 911
 912         /**
 913          * @param string $key
 914          * @return string
 915          */
 916         public function getMonthName( $key ) {
 917                 return $this->getMessageFromDB( self::$mMonthMsgs[$key - 1] );
 918         }
 919
 920         /**
 921          * @return array
 922          */
 923         public function getMonthNamesArray() {
 924                 $monthNames = [ '' ];
 925                 for ( $i = 1; $i < 13; $i++ ) {
 926                         $monthNames[] = $this->getMonthName( $i );
 927                 }
 928                 return $monthNames;
 929         }
 930
 931         /**
 932          * @param string $key
 933          * @return string
 934          */
 935         public function getMonthNameGen( $key ) {
 936                 return $this->getMessageFromDB( self::$mMonthGenMsgs[$key - 1] );
 937         }
 938
 939         /**
 940          * @param string $key
 941          * @return string
 942          */
 943         public function getMonthAbbreviation( $key ) {
 944                 return $this->getMessageFromDB( self::$mMonthAbbrevMsgs[$key - 1] );
 945         }
 946
 947         /**
 948          * @return array
 949          */
 950         public function getMonthAbbreviationsArray() {
 951                 $monthNames = [ '' ];
 952                 for ( $i = 1; $i < 13; $i++ ) {
 953                         $monthNames[] = $this->getMonthAbbreviation( $i );
 954                 }
 955                 return $monthNames;
 956         }
 957
 958         /**
 959          * @param string $key
 960          * @return string
 961          */
 962         public function getWeekdayName( $key ) {
 963                 return $this->getMessageFromDB( self::$mWeekdayMsgs[$key - 1] );
 964         }
 965
 966         /**
 967          * @param string $key
 968          * @return string
 969          */
 970         function getWeekdayAbbreviation( $key ) {
 971                 return $this->getMessageFromDB( self::$mWeekdayAbbrevMsgs[$key - 1] );
 972         }
 973
 974         /**
 975          * @param string $key
 976          * @return string
 977          */
 978         function getIranianCalendarMonthName( $key ) {
 979                 return $this->getMessageFromDB( self::$mIranianCalendarMonthMsgs[$key - 1] );
 980         }
 981
 982         /**
 983          * @param string $key
 984          * @return string
 985          */
 986         function getHebrewCalendarMonthName( $key ) {
 987                 return $this->getMessageFromDB( self::$mHebrewCalendarMonthMsgs[$key - 1] );
 988         }
 989
 990         /**
 991          * @param string $key
 992          * @return string
 993          */
 994         function getHebrewCalendarMonthNameGen( $key ) {
 995                 return $this->getMessageFromDB( self::$mHebrewCalendarMonthGenMsgs[$key - 1] );
 996         }
 997
 998         /**
 999          * @param string $key
1000          * @return string
1001          */
1002         function getHijriCalendarMonthName( $key ) {
1003                 return $this->getMessageFromDB( self::$mHijriCalendarMonthMsgs[$key - 1] );
1004         }
1005
1006         /**
1007          * Pass through result from $dateTimeObj->format()
1008          * @param DateTime|bool|null &$dateTimeObj
1009          * @param string $ts
1010          * @param DateTimeZone|bool|null $zone
1011          * @param string $code
1012          * @return string
1013          */
1014         private static function dateTimeObjFormat( &$dateTimeObj, $ts, $zone, $code ) {
1015                 if ( !$dateTimeObj ) {
1016                         $dateTimeObj = DateTime::createFromFormat(
1017                                 'YmdHis', $ts, $zone ?: new DateTimeZone( 'UTC' )
1018                         );
1019                 }
1020                 return $dateTimeObj->format( $code );
1021         }
1022
1023         /**
1024          * This is a workalike of PHP's date() function, but with better
1025          * internationalisation, a reduced set of format characters, and a better
1026          * escaping format.
1027          *
1028          * Supported format characters are dDjlNwzWFmMntLoYyaAgGhHiscrUeIOPTZ. See
1029          * the PHP manual for definitions. There are a number of extensions, which
1030          * start with "x":
1031          *
1032          *    xn   Do not translate digits of the next numeric format character
1033          *    xN   Toggle raw digit (xn) flag, stays set until explicitly unset
1034          *    xr   Use roman numerals for the next numeric format character
1035          *    xh   Use hebrew numerals for the next numeric format character
1036          *    xx   Literal x
1037          *    xg   Genitive month name
1038          *
1039          *    xij  j (day number) in Iranian calendar
1040          *    xiF  F (month name) in Iranian calendar
1041          *    xin  n (month number) in Iranian calendar
1042          *    xiy  y (two digit year) in Iranian calendar
1043          *    xiY  Y (full year) in Iranian calendar
1044          *    xit  t (days in month) in Iranian calendar
1045          *
1046          *    xjj  j (day number) in Hebrew calendar
1047          *    xjF  F (month name) in Hebrew calendar
1048          *    xjt  t (days in month) in Hebrew calendar
1049          *    xjx  xg (genitive month name) in Hebrew calendar
1050          *    xjn  n (month number) in Hebrew calendar
1051          *    xjY  Y (full year) in Hebrew calendar
1052          *
1053          *    xmj  j (day number) in Hijri calendar
1054          *    xmF  F (month name) in Hijri calendar
1055          *    xmn  n (month number) in Hijri calendar
1056          *    xmY  Y (full year) in Hijri calendar
1057          *
1058          *    xkY  Y (full year) in Thai solar calendar. Months and days are
1059          *                       identical to the Gregorian calendar
1060          *    xoY  Y (full year) in Minguo calendar or Juche year.
1061          *                       Months and days are identical to the
1062          *                       Gregorian calendar
1063          *    xtY  Y (full year) in Japanese nengo. Months and days are
1064          *                       identical to the Gregorian calendar
1065          *
1066          * Characters enclosed in double quotes will be considered literal (with
1067          * the quotes themselves removed). Unmatched quotes will be considered
1068          * literal quotes. Example:
1069          *
1070          * "The month is" F       => The month is January
1071          * i's"                   => 20'11"
1072          *
1073          * Backslash escaping is also supported.
1074          *
1075          * Input timestamp is assumed to be pre-normalized to the desired local
1076          * time zone, if any. Note that the format characters crUeIOPTZ will assume
1077          * $ts is UTC if $zone is not given.
1078          *
1079          * @param string $format
1080          * @param string $ts 14-character timestamp
1081          *      YYYYMMDDHHMMSS
1082          *      01234567890123
1083          * @param DateTimeZone $zone Timezone of $ts
1084          * @param[out] int $ttl The amount of time (in seconds) the output may be cached for.
1085          * Only makes sense if $ts is the current time.
1086          * @todo handling of "o" format character for Iranian, Hebrew, Hijri & Thai?
1087          *
1088          * @throws MWException
1089          * @return string
1090          */
1091         public function sprintfDate( $format, $ts, DateTimeZone $zone = null, &$ttl = 'unused' ) {
1092                 $s = '';
1093                 $raw = false;
1094                 $roman = false;
1095                 $hebrewNum = false;
1096                 $dateTimeObj = false;
1097                 $rawToggle = false;
1098                 $iranian = false;
1099                 $hebrew = false;
1100                 $hijri = false;
1101                 $thai = false;
1102                 $minguo = false;
1103                 $tenno = false;
1104
1105                 $usedSecond = false;
1106                 $usedMinute = false;
1107                 $usedHour = false;
1108                 $usedAMPM = false;
1109                 $usedDay = false;
1110                 $usedWeek = false;
1111                 $usedMonth = false;
1112                 $usedYear = false;
1113                 $usedISOYear = false;
1114                 $usedIsLeapYear = false;
1115
1116                 $usedHebrewMonth = false;
1117                 $usedIranianMonth = false;
1118                 $usedHijriMonth = false;
1119                 $usedHebrewYear = false;
1120                 $usedIranianYear = false;
1121                 $usedHijriYear = false;
1122                 $usedTennoYear = false;
1123
1124                 if ( strlen( $ts ) !== 14 ) {
1125                         throw new MWException( __METHOD__ . ": The timestamp $ts should have 14 characters" );
1126                 }
1127
1128                 if ( !ctype_digit( $ts ) ) {
1129                         throw new MWException( __METHOD__ . ": The timestamp $ts should be a number" );
1130                 }
1131
1132                 $formatLength = strlen( $format );
1133                 for ( $p = 0; $p < $formatLength; $p++ ) {
1134                         $num = false;
1135                         $code = $format[$p];
1136                         if ( $code == 'x' && $p < $formatLength - 1 ) {
1137                                 $code .= $format[++$p];
1138                         }
1139
1140                         if ( ( $code === 'xi'
1141                                         || $code === 'xj'
1142                                         || $code === 'xk'
1143                                         || $code === 'xm'
1144                                         || $code === 'xo'
1145                                         || $code === 'xt' )
1146                                 && $p < $formatLength - 1 ) {
1147                                 $code .= $format[++$p];
1148                         }
1149
1150                         switch ( $code ) {
1151                                 case 'xx':
1152                                         $s .= 'x';
1153                                         break;
1154                                 case 'xn':
1155                                         $raw = true;
1156                                         break;
1157                                 case 'xN':
1158                                         $rawToggle = !$rawToggle;
1159                                         break;
1160                                 case 'xr':
1161                                         $roman = true;
1162                                         break;
1163                                 case 'xh':
1164                                         $hebrewNum = true;
1165                                         break;
1166                                 case 'xg':
1167                                         $usedMonth = true;
1168                                         $s .= $this->getMonthNameGen( substr( $ts, 4, 2 ) );
1169                                         break;
1170                                 case 'xjx':
1171                                         $usedHebrewMonth = true;
1172                                         if ( !$hebrew ) {
1173                                                 $hebrew = self::tsToHebrew( $ts );
1174                                         }
1175                                         $s .= $this->getHebrewCalendarMonthNameGen( $hebrew[1] );
1176                                         break;
1177                                 case 'd':
1178                                         $usedDay = true;
1179                                         $num = substr( $ts, 6, 2 );
1180                                         break;
1181                                 case 'D':
1182                                         $usedDay = true;
1183                                         $s .= $this->getWeekdayAbbreviation(
1184                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'w' ) + 1
1185                                         );
1186                                         break;
1187                                 case 'j':
1188                                         $usedDay = true;
1189                                         $num = intval( substr( $ts, 6, 2 ) );
1190                                         break;
1191                                 case 'xij':
1192                                         $usedDay = true;
1193                                         if ( !$iranian ) {
1194                                                 $iranian = self::tsToIranian( $ts );
1195                                         }
1196                                         $num = $iranian[2];
1197                                         break;
1198                                 case 'xmj':
1199                                         $usedDay = true;
1200                                         if ( !$hijri ) {
1201                                                 $hijri = self::tsToHijri( $ts );
1202                                         }
1203                                         $num = $hijri[2];
1204                                         break;
1205                                 case 'xjj':
1206                                         $usedDay = true;
1207                                         if ( !$hebrew ) {
1208                                                 $hebrew = self::tsToHebrew( $ts );
1209                                         }
1210                                         $num = $hebrew[2];
1211                                         break;
1212                                 case 'l':
1213                                         $usedDay = true;
1214                                         $s .= $this->getWeekdayName(
1215                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'w' ) + 1
1216                                         );
1217                                         break;
1218                                 case 'F':
1219                                         $usedMonth = true;
1220                                         $s .= $this->getMonthName( substr( $ts, 4, 2 ) );
1221                                         break;
1222                                 case 'xiF':
1223                                         $usedIranianMonth = true;
1224                                         if ( !$iranian ) {
1225                                                 $iranian = self::tsToIranian( $ts );
1226                                         }
1227                                         $s .= $this->getIranianCalendarMonthName( $iranian[1] );
1228                                         break;
1229                                 case 'xmF':
1230                                         $usedHijriMonth = true;
1231                                         if ( !$hijri ) {
1232                                                 $hijri = self::tsToHijri( $ts );
1233                                         }
1234                                         $s .= $this->getHijriCalendarMonthName( $hijri[1] );
1235                                         break;
1236                                 case 'xjF':
1237                                         $usedHebrewMonth = true;
1238                                         if ( !$hebrew ) {
1239                                                 $hebrew = self::tsToHebrew( $ts );
1240                                         }
1241                                         $s .= $this->getHebrewCalendarMonthName( $hebrew[1] );
1242                                         break;
1243                                 case 'm':
1244                                         $usedMonth = true;
1245                                         $num = substr( $ts, 4, 2 );
1246                                         break;
1247                                 case 'M':
1248                                         $usedMonth = true;
1249                                         $s .= $this->getMonthAbbreviation( substr( $ts, 4, 2 ) );
1250                                         break;
1251                                 case 'n':
1252                                         $usedMonth = true;
1253                                         $num = intval( substr( $ts, 4, 2 ) );
1254                                         break;
1255                                 case 'xin':
1256                                         $usedIranianMonth = true;
1257                                         if ( !$iranian ) {
1258                                                 $iranian = self::tsToIranian( $ts );
1259                                         }
1260                                         $num = $iranian[1];
1261                                         break;
1262                                 case 'xmn':
1263                                         $usedHijriMonth = true;
1264                                         if ( !$hijri ) {
1265                                                 $hijri = self::tsToHijri( $ts );
1266                                         }
1267                                         $num = $hijri[1];
1268                                         break;
1269                                 case 'xjn':
1270                                         $usedHebrewMonth = true;
1271                                         if ( !$hebrew ) {
1272                                                 $hebrew = self::tsToHebrew( $ts );
1273                                         }
1274                                         $num = $hebrew[1];
1275                                         break;
1276                                 case 'xjt':
1277                                         $usedHebrewMonth = true;
1278                                         if ( !$hebrew ) {
1279                                                 $hebrew = self::tsToHebrew( $ts );
1280                                         }
1281                                         $num = $hebrew[3];
1282                                         break;
1283                                 case 'Y':
1284                                         $usedYear = true;
1285                                         $num = substr( $ts, 0, 4 );
1286                                         break;
1287                                 case 'xiY':
1288                                         $usedIranianYear = true;
1289                                         if ( !$iranian ) {
1290                                                 $iranian = self::tsToIranian( $ts );
1291                                         }
1292                                         $num = $iranian[0];
1293                                         break;
1294                                 case 'xmY':
1295                                         $usedHijriYear = true;
1296                                         if ( !$hijri ) {
1297                                                 $hijri = self::tsToHijri( $ts );
1298                                         }
1299                                         $num = $hijri[0];
1300                                         break;
1301                                 case 'xjY':
1302                                         $usedHebrewYear = true;
1303                                         if ( !$hebrew ) {
1304                                                 $hebrew = self::tsToHebrew( $ts );
1305                                         }
1306                                         $num = $hebrew[0];
1307                                         break;
1308                                 case 'xkY':
1309                                         $usedYear = true;
1310                                         if ( !$thai ) {
1311                                                 $thai = self::tsToYear( $ts, 'thai' );
1312                                         }
1313                                         $num = $thai[0];
1314                                         break;
1315                                 case 'xoY':
1316                                         $usedYear = true;
1317                                         if ( !$minguo ) {
1318                                                 $minguo = self::tsToYear( $ts, 'minguo' );
1319                                         }
1320                                         $num = $minguo[0];
1321                                         break;
1322                                 case 'xtY':
1323                                         $usedTennoYear = true;
1324                                         if ( !$tenno ) {
1325                                                 $tenno = self::tsToYear( $ts, 'tenno' );
1326                                         }
1327                                         $num = $tenno[0];
1328                                         break;
1329                                 case 'y':
1330                                         $usedYear = true;
1331                                         $num = substr( $ts, 2, 2 );
1332                                         break;
1333                                 case 'xiy':
1334                                         $usedIranianYear = true;
1335                                         if ( !$iranian ) {
1336                                                 $iranian = self::tsToIranian( $ts );
1337                                         }
1338                                         $num = substr( $iranian[0], -2 );
1339                                         break;
1340                                 case 'xit':
1341                                         $usedIranianYear = true;
1342                                         if ( !$iranian ) {
1343                                                 $iranian = self::tsToIranian( $ts );
1344                                         }
1345                                         $num = self::$IRANIAN_DAYS[$iranian[1] - 1];
1346                                         break;
1347                                 case 'a':
1348                                         $usedAMPM = true;
1349                                         $s .= intval( substr( $ts, 8, 2 ) ) < 12 ? 'am' : 'pm';
1350                                         break;
1351                                 case 'A':
1352                                         $usedAMPM = true;
1353                                         $s .= intval( substr( $ts, 8, 2 ) ) < 12 ? 'AM' : 'PM';
1354                                         break;
1355                                 case 'g':
1356                                         $usedHour = true;
1357                                         $h = substr( $ts, 8, 2 );
1358                                         $num = $h % 12 ? $h % 12 : 12;
1359                                         break;
1360                                 case 'G':
1361                                         $usedHour = true;
1362                                         $num = intval( substr( $ts, 8, 2 ) );
1363                                         break;
1364                                 case 'h':
1365                                         $usedHour = true;
1366                                         $h = substr( $ts, 8, 2 );
1367                                         $num = sprintf( '%02d', $h % 12 ? $h % 12 : 12 );
1368                                         break;
1369                                 case 'H':
1370                                         $usedHour = true;
1371                                         $num = substr( $ts, 8, 2 );
1372                                         break;
1373                                 case 'i':
1374                                         $usedMinute = true;
1375                                         $num = substr( $ts, 10, 2 );
1376                                         break;
1377                                 case 's':
1378                                         $usedSecond = true;
1379                                         $num = substr( $ts, 12, 2 );
1380                                         break;
1381                                 case 'c':
1382                                 case 'r':
1383                                         $usedSecond = true;
1384                                         // fall through
1385                                 case 'e':
1386                                 case 'O':
1387                                 case 'P':
1388                                 case 'T':
1389                                         $s .= Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1390                                         break;
1391                                 case 'w':
1392                                 case 'N':
1393                                 case 'z':
1394                                         $usedDay = true;
1395                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1396                                         break;
1397                                 case 'W':
1398                                         $usedWeek = true;
1399                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1400                                         break;
1401                                 case 't':
1402                                         $usedMonth = true;
1403                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1404                                         break;
1405                                 case 'L':
1406                                         $usedIsLeapYear = true;
1407                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1408                                         break;
1409                                 case 'o':
1410                                         $usedISOYear = true;
1411                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1412                                         break;
1413                                 case 'U':
1414                                         $usedSecond = true;
1415                                         // fall through
1416                                 case 'I':
1417                                 case 'Z':
1418                                         $num = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, $code );
1419                                         break;
1420                                 case '\\':
1421                                         # Backslash escaping
1422                                         if ( $p < $formatLength - 1 ) {
1423                                                 $s .= $format[++$p];
1424                                         } else {
1425                                                 $s .= '\\';
1426                                         }
1427                                         break;
1428                                 case '"':
1429                                         # Quoted literal
1430                                         if ( $p < $formatLength - 1 ) {
1431                                                 $endQuote = strpos( $format, '"', $p + 1 );
1432                                                 if ( $endQuote === false ) {
1433                                                         # No terminating quote, assume literal "
1434                                                         $s .= '"';
1435                                                 } else {
1436                                                         $s .= substr( $format, $p + 1, $endQuote - $p - 1 );
1437                                                         $p = $endQuote;
1438                                                 }
1439                                         } else {
1440                                                 # Quote at end of string, assume literal "
1441                                                 $s .= '"';
1442                                         }
1443                                         break;
1444                                 default:
1445                                         $s .= $format[$p];
1446                         }
1447                         if ( $num !== false ) {
1448                                 if ( $rawToggle || $raw ) {
1449                                         $s .= $num;
1450                                         $raw = false;
1451                                 } elseif ( $roman ) {
1452                                         $s .= Language::romanNumeral( $num );
1453                                         $roman = false;
1454                                 } elseif ( $hebrewNum ) {
1455                                         $s .= self::hebrewNumeral( $num );
1456                                         $hebrewNum = false;
1457                                 } else {
1458                                         $s .= $this->formatNum( $num, true );
1459                                 }
1460                         }
1461                 }
1462
1463                 if ( $ttl === 'unused' ) {
1464                         // No need to calculate the TTL, the caller wont use it anyway.
1465                 } elseif ( $usedSecond ) {
1466                         $ttl = 1;
1467                 } elseif ( $usedMinute ) {
1468                         $ttl = 60 - substr( $ts, 12, 2 );
1469                 } elseif ( $usedHour ) {
1470                         $ttl = 3600 - substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1471                 } elseif ( $usedAMPM ) {
1472                         $ttl = 43200 - ( substr( $ts, 8, 2 ) % 12 ) * 3600 -
1473                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1474                 } elseif (
1475                         $usedDay ||
1476                         $usedHebrewMonth ||
1477                         $usedIranianMonth ||
1478                         $usedHijriMonth ||
1479                         $usedHebrewYear ||
1480                         $usedIranianYear ||
1481                         $usedHijriYear ||
1482                         $usedTennoYear
1483                 ) {
1484                         // @todo Someone who understands the non-Gregorian calendars
1485                         // should write proper logic for them so that they don't need purged every day.
1486                         $ttl = 86400 - substr( $ts, 8, 2 ) * 3600 -
1487                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1488                 } else {
1489                         $possibleTtls = [];
1490                         $timeRemainingInDay = 86400 - substr( $ts, 8, 2 ) * 3600 -
1491                                 substr( $ts, 10, 2 ) * 60 - substr( $ts, 12, 2 );
1492                         if ( $usedWeek ) {
1493                                 $possibleTtls[] =
1494                                         ( 7 - Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'N' ) ) * 86400 +
1495                                         $timeRemainingInDay;
1496                         } elseif ( $usedISOYear ) {
1497                                 // December 28th falls on the last ISO week of the year, every year.
1498                                 // The last ISO week of a year can be 52 or 53.
1499                                 $lastWeekOfISOYear = DateTime::createFromFormat(
1500                                         'Ymd',
1501                                         substr( $ts, 0, 4 ) . '1228',
1502                                         $zone ?: new DateTimeZone( 'UTC' )
1503                                 )->format( 'W' );
1504                                 $currentISOWeek = Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'W' );
1505                                 $weeksRemaining = $lastWeekOfISOYear - $currentISOWeek;
1506                                 $timeRemainingInWeek =
1507                                         ( 7 - Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'N' ) ) * 86400
1508                                         + $timeRemainingInDay;
1509                                 $possibleTtls[] = $weeksRemaining * 604800 + $timeRemainingInWeek;
1510                         }
1511
1512                         if ( $usedMonth ) {
1513                                 $possibleTtls[] =
1514                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 't' ) -
1515                                                 substr( $ts, 6, 2 ) ) * 86400
1516                                         + $timeRemainingInDay;
1517                         } elseif ( $usedYear ) {
1518                                 $possibleTtls[] =
1519                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'L' ) + 364 -
1520                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'z' ) ) * 86400
1521                                         + $timeRemainingInDay;
1522                         } elseif ( $usedIsLeapYear ) {
1523                                 $year = substr( $ts, 0, 4 );
1524                                 $timeRemainingInYear =
1525                                         ( Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'L' ) + 364 -
1526                                                 Language::dateTimeObjFormat( $dateTimeObj, $ts, $zone, 'z' ) ) * 86400
1527                                         + $timeRemainingInDay;
1528                                 $mod = $year % 4;
1529                                 if ( $mod || ( !( $year % 100 ) && $year % 400 ) ) {
1530                                         // this isn't a leap year. see when the next one starts
1531                                         $nextCandidate = $year - $mod + 4;
1532                                         if ( $nextCandidate % 100 || !( $nextCandidate % 400 ) ) {
1533                                                 $possibleTtls[] = ( $nextCandidate - $year - 1 ) * 365 * 86400 +
1534                                                         $timeRemainingInYear;
1535                                         } else {
1536                                                 $possibleTtls[] = ( $nextCandidate - $year + 3 ) * 365 * 86400 +
1537                                                         $timeRemainingInYear;
1538                                         }
1539                                 } else {
1540                                         // this is a leap year, so the next year isn't
1541                                         $possibleTtls[] = $timeRemainingInYear;
1542                                 }
1543                         }
1544
1545                         if ( $possibleTtls ) {
1546                                 $ttl = min( $possibleTtls );
1547                         }
1548                 }
1549
1550                 return $s;
1551         }
1552
1553         private static $GREG_DAYS = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
1554         private static $IRANIAN_DAYS = [ 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29 ];
1555
1556         /**
1557          * Algorithm by Roozbeh Pournader and Mohammad Toossi to convert
1558          * Gregorian dates to Iranian dates. Originally written in C, it
1559          * is released under the terms of GNU Lesser General Public
1560          * License. Conversion to PHP was performed by Niklas Laxström.
1561          *
1562          * Link: http://www.farsiweb.info/jalali/jalali.c
1563          *
1564          * @param string $ts
1565          *
1566          * @return int[]
1567          */
1568         private static function tsToIranian( $ts ) {
1569                 $gy = substr( $ts, 0, 4 ) -1600;
1570                 $gm = substr( $ts, 4, 2 ) -1;
1571                 $gd = substr( $ts, 6, 2 ) -1;
1572
1573                 # Days passed from the beginning (including leap years)
1574                 $gDayNo = 365 * $gy
1575                         + floor( ( $gy + 3 ) / 4 )
1576                         - floor( ( $gy + 99 ) / 100 )
1577                         + floor( ( $gy + 399 ) / 400 );
1578
1579                 // Add days of the past months of this year
1580                 for ( $i = 0; $i < $gm; $i++ ) {
1581                         $gDayNo += self::$GREG_DAYS[$i];
1582                 }
1583
1584                 // Leap years
1585                 if ( $gm > 1 && ( ( $gy % 4 === 0 && $gy % 100 !== 0 || ( $gy % 400 == 0 ) ) ) ) {
1586                         $gDayNo++;
1587                 }
1588
1589                 // Days passed in current month
1590                 $gDayNo += (int)$gd;
1591
1592                 $jDayNo = $gDayNo - 79;
1593
1594                 $jNp = floor( $jDayNo / 12053 );
1595                 $jDayNo %= 12053;
1596
1597                 $jy = 979 + 33 * $jNp + 4 * floor( $jDayNo / 1461 );
1598                 $jDayNo %= 1461;
1599
1600                 if ( $jDayNo >= 366 ) {
1601                         $jy += floor( ( $jDayNo - 1 ) / 365 );
1602                         $jDayNo = floor( ( $jDayNo - 1 ) % 365 );
1603                 }
1604
1605                 for ( $i = 0; $i < 11 && $jDayNo >= self::$IRANIAN_DAYS[$i]; $i++ ) {
1606                         $jDayNo -= self::$IRANIAN_DAYS[$i];
1607                 }
1608
1609                 $jm = $i + 1;
1610                 $jd = $jDayNo + 1;
1611
1612                 return [ $jy, $jm, $jd ];
1613         }
1614
1615         /**
1616          * Converting Gregorian dates to Hijri dates.
1617          *
1618          * Based on a PHP-Nuke block by Sharjeel which is released under GNU/GPL license
1619          *
1620          * @see http://phpnuke.org/modules.php?name=News&file=article&sid=8234&mode=thread&order=0&thold=0
1621          *
1622          * @param string $ts
1623          *
1624          * @return int[]
1625          */
1626         private static function tsToHijri( $ts ) {
1627                 $year = substr( $ts, 0, 4 );
1628                 $month = substr( $ts, 4, 2 );
1629                 $day = substr( $ts, 6, 2 );
1630
1631                 $zyr = $year;
1632                 $zd = $day;
1633                 $zm = $month;
1634                 $zy = $zyr;
1635
1636                 if (
1637                         ( $zy > 1582 ) || ( ( $zy == 1582 ) && ( $zm > 10 ) ) ||
1638                         ( ( $zy == 1582 ) && ( $zm == 10 ) && ( $zd > 14 ) )
1639                 ) {
1640                         $zjd = (int)( ( 1461 * ( $zy + 4800 + (int)( ( $zm - 14 ) / 12 ) ) ) / 4 ) +
1641                                         (int)( ( 367 * ( $zm - 2 - 12 * ( (int)( ( $zm - 14 ) / 12 ) ) ) ) / 12 ) -
1642                                         (int)( ( 3 * (int)( ( ( $zy + 4900 + (int)( ( $zm - 14 ) / 12 ) ) / 100 ) ) ) / 4 ) +
1643                                         $zd - 32075;
1644                 } else {
1645                         $zjd = 367 * $zy - (int)( ( 7 * ( $zy + 5001 + (int)( ( $zm - 9 ) / 7 ) ) ) / 4 ) +
1646                                                                 (int)( ( 275 * $zm ) / 9 ) + $zd + 1729777;
1647                 }
1648
1649                 $zl = $zjd -1948440 + 10632;
1650                 $zn = (int)( ( $zl - 1 ) / 10631 );
1651                 $zl = $zl - 10631 * $zn + 354;
1652                 $zj = ( (int)( ( 10985 - $zl ) / 5316 ) ) * ( (int)( ( 50 * $zl ) / 17719 ) ) +
1653                         ( (int)( $zl / 5670 ) ) * ( (int)( ( 43 * $zl ) / 15238 ) );
1654                 $zl = $zl - ( (int)( ( 30 - $zj ) / 15 ) ) * ( (int)( ( 17719 * $zj ) / 50 ) ) -
1655                         ( (int)( $zj / 16 ) ) * ( (int)( ( 15238 * $zj ) / 43 ) ) + 29;
1656                 $zm = (int)( ( 24 * $zl ) / 709 );
1657                 $zd = $zl - (int)( ( 709 * $zm ) / 24 );
1658                 $zy = 30 * $zn + $zj - 30;
1659
1660                 return [ $zy, $zm, $zd ];
1661         }
1662
1663         /**
1664          * Converting Gregorian dates to Hebrew dates.
1665          *
1666          * Based on a JavaScript code by Abu Mami and Yisrael Hersch
1667          * (abu-mami@kaluach.net, http://www.kaluach.net), who permitted
1668          * to translate the relevant functions into PHP and release them under
1669          * GNU GPL.
1670          *
1671          * The months are counted from Tishrei = 1. In a leap year, Adar I is 13
1672          * and Adar II is 14. In a non-leap year, Adar is 6.
1673          *
1674          * @param string $ts
1675          *
1676          * @return int[]
1677          */
1678         private static function tsToHebrew( $ts ) {
1679                 # Parse date
1680                 $year = substr( $ts, 0, 4 );
1681                 $month = substr( $ts, 4, 2 );
1682                 $day = substr( $ts, 6, 2 );
1683
1684                 # Calculate Hebrew year
1685                 $hebrewYear = $year + 3760;
1686
1687                 # Month number when September = 1, August = 12
1688                 $month += 4;
1689                 if ( $month > 12 ) {
1690                         # Next year
1691                         $month -= 12;
1692                         $year++;
1693                         $hebrewYear++;
1694                 }
1695
1696                 # Calculate day of year from 1 September
1697                 $dayOfYear = $day;
1698                 for ( $i = 1; $i < $month; $i++ ) {
1699                         if ( $i == 6 ) {
1700                                 # February
1701                                 $dayOfYear += 28;
1702                                 # Check if the year is leap
1703                                 if ( $year % 400 == 0 || ( $year % 4 == 0 && $year % 100 > 0 ) ) {
1704                                         $dayOfYear++;
1705                                 }
1706                         } elseif ( $i == 8 || $i == 10 || $i == 1 || $i == 3 ) {
1707                                 $dayOfYear += 30;
1708                         } else {
1709                                 $dayOfYear += 31;
1710                         }
1711                 }
1712
1713                 # Calculate the start of the Hebrew year
1714                 $start = self::hebrewYearStart( $hebrewYear );
1715
1716                 # Calculate next year's start
1717                 if ( $dayOfYear <= $start ) {
1718                         # Day is before the start of the year - it is the previous year
1719                         # Next year's start
1720                         $nextStart = $start;
1721                         # Previous year
1722                         $year--;
1723                         $hebrewYear--;
1724                         # Add days since previous year's 1 September
1725                         $dayOfYear += 365;
1726                         if ( ( $year % 400 == 0 ) || ( $year % 100 != 0 && $year % 4 == 0 ) ) {
1727                                 # Leap year
1728                                 $dayOfYear++;
1729                         }
1730                         # Start of the new (previous) year
1731                         $start = self::hebrewYearStart( $hebrewYear );
1732                 } else {
1733                         # Next year's start
1734                         $nextStart = self::hebrewYearStart( $hebrewYear + 1 );
1735                 }
1736
1737                 # Calculate Hebrew day of year
1738                 $hebrewDayOfYear = $dayOfYear - $start;
1739
1740                 # Difference between year's days
1741                 $diff = $nextStart - $start;
1742                 # Add 12 (or 13 for leap years) days to ignore the difference between
1743                 # Hebrew and Gregorian year (353 at least vs. 365/6) - now the
1744                 # difference is only about the year type
1745                 if ( ( $year % 400 == 0 ) || ( $year % 100 != 0 && $year % 4 == 0 ) ) {
1746                         $diff += 13;
1747                 } else {
1748                         $diff += 12;
1749                 }
1750
1751                 # Check the year pattern, and is leap year
1752                 # 0 means an incomplete year, 1 means a regular year, 2 means a complete year
1753                 # This is mod 30, to work on both leap years (which add 30 days of Adar I)
1754                 # and non-leap years
1755                 $yearPattern = $diff % 30;
1756                 # Check if leap year
1757                 $isLeap = $diff >= 30;
1758
1759                 # Calculate day in the month from number of day in the Hebrew year
1760                 # Don't check Adar - if the day is not in Adar, we will stop before;
1761                 # if it is in Adar, we will use it to check if it is Adar I or Adar II
1762                 $hebrewDay = $hebrewDayOfYear;
1763                 $hebrewMonth = 1;
1764                 $days = 0;
1765                 while ( $hebrewMonth <= 12 ) {
1766                         # Calculate days in this month
1767                         if ( $isLeap && $hebrewMonth == 6 ) {
1768                                 # Adar in a leap year
1769                                 if ( $isLeap ) {
1770                                         # Leap year - has Adar I, with 30 days, and Adar II, with 29 days
1771                                         $days = 30;
1772                                         if ( $hebrewDay <= $days ) {
1773                                                 # Day in Adar I
1774                                                 $hebrewMonth = 13;
1775                                         } else {
1776                                                 # Subtract the days of Adar I
1777                                                 $hebrewDay -= $days;
1778                                                 # Try Adar II
1779                                                 $days = 29;
1780                                                 if ( $hebrewDay <= $days ) {
1781                                                         # Day in Adar II
1782                                                         $hebrewMonth = 14;
1783                                                 }
1784                                         }
1785                                 }
1786                         } elseif ( $hebrewMonth == 2 && $yearPattern == 2 ) {
1787                                 # Cheshvan in a complete year (otherwise as the rule below)
1788                                 $days = 30;
1789                         } elseif ( $hebrewMonth == 3 && $yearPattern == 0 ) {
1790                                 # Kislev in an incomplete year (otherwise as the rule below)
1791                                 $days = 29;
1792                         } else {
1793                                 # Odd months have 30 days, even have 29
1794                                 $days = 30 - ( $hebrewMonth - 1 ) % 2;
1795                         }
1796                         if ( $hebrewDay <= $days ) {
1797                                 # In the current month
1798                                 break;
1799                         } else {
1800                                 # Subtract the days of the current month
1801                                 $hebrewDay -= $days;
1802                                 # Try in the next month
1803                                 $hebrewMonth++;
1804                         }
1805                 }
1806
1807                 return [ $hebrewYear, $hebrewMonth, $hebrewDay, $days ];
1808         }
1809
1810         /**
1811          * This calculates the Hebrew year start, as days since 1 September.
1812          * Based on Carl Friedrich Gauss algorithm for finding Easter date.
1813          * Used for Hebrew date.
1814          *
1815          * @param int $year
1816          *
1817          * @return string
1818          */
1819         private static function hebrewYearStart( $year ) {
1820                 $a = intval( ( 12 * ( $year - 1 ) + 17 ) % 19 );
1821                 $b = intval( ( $year - 1 ) % 4 );
1822                 $m = 32.044093161144 + 1.5542417966212 * $a + $b / 4.0 - 0.0031777940220923 * ( $year - 1 );
1823                 if ( $m < 0 ) {
1824                         $m--;
1825                 }
1826                 $Mar = intval( $m );
1827                 if ( $m < 0 ) {
1828                         $m++;
1829                 }
1830                 $m -= $Mar;
1831
1832                 $c = intval( ( $Mar + 3 * ( $year - 1 ) + 5 * $b + 5 ) % 7 );
1833                 if ( $c == 0 && $a > 11 && $m >= 0.89772376543210 ) {
1834                         $Mar++;
1835                 } elseif ( $c == 1 && $a > 6 && $m >= 0.63287037037037 ) {
1836                         $Mar += 2;
1837                 } elseif ( $c == 2 || $c == 4 || $c == 6 ) {
1838                         $Mar++;
1839                 }
1840
1841                 $Mar += intval( ( $year - 3761 ) / 100 ) - intval( ( $year - 3761 ) / 400 ) - 24;
1842                 return $Mar;
1843         }
1844
1845         /**
1846          * Algorithm to convert Gregorian dates to Thai solar dates,
1847          * Minguo dates or Minguo dates.
1848          *
1849          * Link: http://en.wikipedia.org/wiki/Thai_solar_calendar
1850          *       http://en.wikipedia.org/wiki/Minguo_calendar
1851          *       http://en.wikipedia.org/wiki/Japanese_era_name
1852          *
1853          * @param string $ts 14-character timestamp
1854          * @param string $cName Calender name
1855          * @return array Converted year, month, day
1856          */
1857         private static function tsToYear( $ts, $cName ) {
1858                 $gy = substr( $ts, 0, 4 );
1859                 $gm = substr( $ts, 4, 2 );
1860                 $gd = substr( $ts, 6, 2 );
1861
1862                 if ( !strcmp( $cName, 'thai' ) ) {
1863                         # Thai solar dates
1864                         # Add 543 years to the Gregorian calendar
1865                         # Months and days are identical
1866                         $gy_offset = $gy + 543;
1867                 } elseif ( ( !strcmp( $cName, 'minguo' ) ) || !strcmp( $cName, 'juche' ) ) {
1868                         # Minguo dates
1869                         # Deduct 1911 years from the Gregorian calendar
1870                         # Months and days are identical
1871                         $gy_offset = $gy - 1911;
1872                 } elseif ( !strcmp( $cName, 'tenno' ) ) {
1873                         # Nengō dates up to Meiji period
1874                         # Deduct years from the Gregorian calendar
1875                         # depending on the nengo periods
1876                         # Months and days are identical
1877                         if ( ( $gy < 1912 )
1878                                 || ( ( $gy == 1912 ) && ( $gm < 7 ) )
1879                                 || ( ( $gy == 1912 ) && ( $gm == 7 ) && ( $gd < 31 ) )
1880                         ) {
1881                                 # Meiji period
1882                                 $gy_gannen = $gy - 1868 + 1;
1883                                 $gy_offset = $gy_gannen;
1884                                 if ( $gy_gannen == 1 ) {
1885                                         $gy_offset = '元';
1886                                 }
1887                                 $gy_offset = '明治' . $gy_offset;
1888                         } elseif (
1889                                 ( ( $gy == 1912 ) && ( $gm == 7 ) && ( $gd == 31 ) ) ||
1890                                 ( ( $gy == 1912 ) && ( $gm >= 8 ) ) ||
1891                                 ( ( $gy > 1912 ) && ( $gy < 1926 ) ) ||
1892                                 ( ( $gy == 1926 ) && ( $gm < 12 ) ) ||
1893                                 ( ( $gy == 1926 ) && ( $gm == 12 ) && ( $gd < 26 ) )
1894                         ) {
1895                                 # Taishō period
1896                                 $gy_gannen = $gy - 1912 + 1;
1897                                 $gy_offset = $gy_gannen;
1898                                 if ( $gy_gannen == 1 ) {
1899                                         $gy_offset = '元';
1900                                 }
1901                                 $gy_offset = '大正' . $gy_offset;
1902                         } elseif (
1903                                 ( ( $gy == 1926 ) && ( $gm == 12 ) && ( $gd >= 26 ) ) ||
1904                                 ( ( $gy > 1926 ) && ( $gy < 1989 ) ) ||
1905                                 ( ( $gy == 1989 ) && ( $gm == 1 ) && ( $gd < 8 ) )
1906                         ) {
1907                                 # Shōwa period
1908                                 $gy_gannen = $gy - 1926 + 1;
1909                                 $gy_offset = $gy_gannen;
1910                                 if ( $gy_gannen == 1 ) {
1911                                         $gy_offset = '元';
1912                                 }
1913                                 $gy_offset = '昭和' . $gy_offset;
1914                         } else {
1915                                 # Heisei period
1916                                 $gy_gannen = $gy - 1989 + 1;
1917                                 $gy_offset = $gy_gannen;
1918                                 if ( $gy_gannen == 1 ) {
1919                                         $gy_offset = '元';
1920                                 }
1921                                 $gy_offset = '平成' . $gy_offset;
1922                         }
1923                 } else {
1924                         $gy_offset = $gy;
1925                 }
1926
1927                 return [ $gy_offset, $gm, $gd ];
1928         }
1929
1930         /**
1931          * Gets directionality of the first strongly directional codepoint, for embedBidi()
1932          *
1933          * This is the rule the BIDI algorithm uses to determine the directionality of
1934          * paragraphs ( http://unicode.org/reports/tr9/#The_Paragraph_Level ) and
1935          * FSI isolates ( http://unicode.org/reports/tr9/#Explicit_Directional_Isolates ).
1936          *
1937          * TODO: Does not handle BIDI control characters inside the text.
1938          * TODO: Does not handle unallocated characters.
1939          *
1940          * @param string $text Text to test
1941          * @return null|string Directionality ('ltr' or 'rtl') or null
1942          */
1943         private static function strongDirFromContent( $text = '' ) {
1944                 if ( !preg_match( self::$strongDirRegex, $text, $matches ) ) {
1945                         return null;
1946                 }
1947                 if ( $matches[1] === '' ) {
1948                         return 'rtl';
1949                 }
1950                 return 'ltr';
1951         }
1952
1953         /**
1954          * Roman number formatting up to 10000
1955          *
1956          * @param int $num
1957          *
1958          * @return string
1959          */
1960         static function romanNumeral( $num ) {
1961                 static $table = [
1962                         [ '', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X' ],
1963                         [ '', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC', 'C' ],
1964                         [ '', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM', 'M' ],
1965                         [ '', 'M', 'MM', 'MMM', 'MMMM', 'MMMMM', 'MMMMMM', 'MMMMMMM',
1966                                 'MMMMMMMM', 'MMMMMMMMM', 'MMMMMMMMMM' ]
1967                 ];
1968
1969                 $num = intval( $num );
1970                 if ( $num > 10000 || $num <= 0 ) {
1971                         return $num;
1972                 }
1973
1974                 $s = '';
1975                 for ( $pow10 = 1000, $i = 3; $i >= 0; $pow10 /= 10, $i-- ) {
1976                         if ( $num >= $pow10 ) {
1977                                 $s .= $table[$i][(int)floor( $num / $pow10 )];
1978                         }
1979                         $num = $num % $pow10;
1980                 }
1981                 return $s;
1982         }
1983
1984         /**
1985          * Hebrew Gematria number formatting up to 9999
1986          *
1987          * @param int $num
1988          *
1989          * @return string
1990          */
1991         static function hebrewNumeral( $num ) {
1992                 static $table = [
1993                         [ '', 'א', 'ב', 'ג', 'ד', 'ה', 'ו', 'ז', 'ח', 'ט', 'י' ],
1994                         [ '', 'י', 'כ', 'ל', 'מ', 'נ', 'ס', 'ע', 'פ', 'צ', 'ק' ],
1995                         [ '',
1996                                 [ 'ק' ],
1997                                 [ 'ר' ],
1998                                 [ 'ש' ],
1999                                 [ 'ת' ],
2000                                 [ 'ת', 'ק' ],
2001                                 [ 'ת', 'ר' ],
2002                                 [ 'ת', 'ש' ],
2003                                 [ 'ת', 'ת' ],
2004                                 [ 'ת', 'ת', 'ק' ],
2005                                 [ 'ת', 'ת', 'ר' ],
2006                         ],
2007                         [ '', 'א', 'ב', 'ג', 'ד', 'ה', 'ו', 'ז', 'ח', 'ט', 'י' ]
2008                 ];
2009
2010                 $num = intval( $num );
2011                 if ( $num > 9999 || $num <= 0 ) {
2012                         return $num;
2013                 }
2014
2015                 // Round thousands have special notations
2016                 if ( $num === 1000 ) {
2017                         return "א' אלף";
2018                 } elseif ( $num % 1000 === 0 ) {
2019                         return $table[0][$num / 1000] . "' אלפים";
2020                 }
2021
2022                 $letters = [];
2023
2024                 for ( $pow10 = 1000, $i = 3; $i >= 0; $pow10 /= 10, $i-- ) {
2025                         if ( $num >= $pow10 ) {
2026                                 if ( $num === 15 || $num === 16 ) {
2027                                         $letters[] = $table[0][9];
2028                                         $letters[] = $table[0][$num - 9];
2029                                         $num = 0;
2030                                 } else {
2031                                         $letters = array_merge(
2032                                                 $letters,
2033                                                 (array)$table[$i][intval( $num / $pow10 )]
2034                                         );
2035
2036                                         if ( $pow10 === 1000 ) {
2037                                                 $letters[] = "'";
2038                                         }
2039                                 }
2040                         }
2041
2042                         $num = $num % $pow10;
2043                 }
2044
2045                 $preTransformLength = count( $letters );
2046                 if ( $preTransformLength === 1 ) {
2047                         // Add geresh (single quote) to one-letter numbers
2048                         $letters[] = "'";
2049                 } else {
2050                         $lastIndex = $preTransformLength - 1;
2051                         $letters[$lastIndex] = str_replace(
2052                                 [ 'כ', 'מ', 'נ', 'פ', 'צ' ],
2053                                 [ 'ך', 'ם', 'ן', 'ף', 'ץ' ],
2054                                 $letters[$lastIndex]
2055                         );
2056
2057                         // Add gershayim (double quote) to multiple-letter numbers,
2058                         // but exclude numbers with only one letter after the thousands
2059                         // (1001-1009, 1020, 1030, 2001-2009, etc.)
2060                         if ( $letters[1] === "'" && $preTransformLength === 3 ) {
2061                                 $letters[] = "'";
2062                         } else {
2063                                 array_splice( $letters, -1, 0, '"' );
2064                         }
2065                 }
2066
2067                 return implode( $letters );
2068         }
2069
2070         /**
2071          * Used by date() and time() to adjust the time output.
2072          *
2073          * @param string $ts The time in date('YmdHis') format
2074          * @param mixed $tz Adjust the time by this amount (default false, mean we
2075          *   get user timecorrection setting)
2076          * @return int
2077          */
2078         public function userAdjust( $ts, $tz = false ) {
2079                 global $wgUser, $wgLocalTZoffset;
2080
2081                 if ( $tz === false ) {
2082                         $tz = $wgUser->getOption( 'timecorrection' );
2083                 }
2084
2085                 $data = explode( '|', $tz, 3 );
2086
2087                 if ( $data[0] == 'ZoneInfo' ) {
2088                         MediaWiki\suppressWarnings();
2089                         $userTZ = timezone_open( $data[2] );
2090                         MediaWiki\restoreWarnings();
2091                         if ( $userTZ !== false ) {
2092                                 $date = date_create( $ts, timezone_open( 'UTC' ) );
2093                                 date_timezone_set( $date, $userTZ );
2094                                 $date = date_format( $date, 'YmdHis' );
2095                                 return $date;
2096                         }
2097                         # Unrecognized timezone, default to 'Offset' with the stored offset.
2098                         $data[0] = 'Offset';
2099                 }
2100
2101                 if ( $data[0] == 'System' || $tz == '' ) {
2102                         # Global offset in minutes.
2103                         $minDiff = $wgLocalTZoffset;
2104                 } elseif ( $data[0] == 'Offset' ) {
2105                         $minDiff = intval( $data[1] );
2106                 } else {
2107                         $data = explode( ':', $tz );
2108                         if ( count( $data ) == 2 ) {
2109                                 $data[0] = intval( $data[0] );
2110                                 $data[1] = intval( $data[1] );
2111                                 $minDiff = abs( $data[0] ) * 60 + $data[1];
2112                                 if ( $data[0] < 0 ) {
2113                                         $minDiff = -$minDiff;
2114                                 }
2115                         } else {
2116                                 $minDiff = intval( $data[0] ) * 60;
2117                         }
2118                 }
2119
2120                 # No difference ? Return time unchanged
2121                 if ( 0 == $minDiff ) {
2122                         return $ts;
2123                 }
2124
2125                 MediaWiki\suppressWarnings(); // E_STRICT system time bitching
2126                 # Generate an adjusted date; take advantage of the fact that mktime
2127                 # will normalize out-of-range values so we don't have to split $minDiff
2128                 # into hours and minutes.
2129                 $t = mktime( (
2130                         (int)substr( $ts, 8, 2 ) ), # Hours
2131                         (int)substr( $ts, 10, 2 ) + $minDiff, # Minutes
2132                         (int)substr( $ts, 12, 2 ), # Seconds
2133                         (int)substr( $ts, 4, 2 ), # Month
2134                         (int)substr( $ts, 6, 2 ), # Day
2135                         (int)substr( $ts, 0, 4 ) ); # Year
2136
2137                 $date = date( 'YmdHis', $t );
2138                 MediaWiki\restoreWarnings();
2139
2140                 return $date;
2141         }
2142
2143         /**
2144          * This is meant to be used by time(), date(), and timeanddate() to get
2145          * the date preference they're supposed to use, it should be used in
2146          * all children.
2147          *
2148          *<code>
2149          * function timeanddate([...], $format = true) {
2150          *      $datePreference = $this->dateFormat($format);
2151          * [...]
2152          * }
2153          *</code>
2154          *
2155          * @param int|string|bool $usePrefs If true, the user's preference is used
2156          *   if false, the site/language default is used
2157          *   if int/string, assumed to be a format.
2158          * @return string
2159          */
2160         function dateFormat( $usePrefs = true ) {
2161                 global $wgUser;
2162
2163                 if ( is_bool( $usePrefs ) ) {
2164                         if ( $usePrefs ) {
2165                                 $datePreference = $wgUser->getDatePreference();
2166                         } else {
2167                                 $datePreference = (string)User::getDefaultOption( 'date' );
2168                         }
2169                 } else {
2170                         $datePreference = (string)$usePrefs;
2171                 }
2172
2173                 // return int
2174                 if ( $datePreference == '' ) {
2175                         return 'default';
2176                 }
2177
2178                 return $datePreference;
2179         }
2180
2181         /**
2182          * Get a format string for a given type and preference
2183          * @param string $type May be 'date', 'time', 'both', or 'pretty'.
2184          * @param string $pref The format name as it appears in Messages*.php under
2185          *  $datePreferences.
2186          *
2187          * @since 1.22 New type 'pretty' that provides a more readable timestamp format
2188          *
2189          * @return string
2190          */
2191         function getDateFormatString( $type, $pref ) {
2192                 $wasDefault = false;
2193                 if ( $pref == 'default' ) {
2194                         $wasDefault = true;
2195                         $pref = $this->getDefaultDateFormat();
2196                 }
2197
2198                 if ( !isset( $this->dateFormatStrings[$type][$pref] ) ) {
2199                         $df = self::$dataCache->getSubitem( $this->mCode, 'dateFormats', "$pref $type" );
2200
2201                         if ( $type === 'pretty' && $df === null ) {
2202                                 $df = $this->getDateFormatString( 'date', $pref );
2203                         }
2204
2205                         if ( !$wasDefault && $df === null ) {
2206                                 $pref = $this->getDefaultDateFormat();
2207                                 $df = self::$dataCache->getSubitem( $this->mCode, 'dateFormats', "$pref $type" );
2208                         }
2209
2210                         $this->dateFormatStrings[$type][$pref] = $df;
2211                 }
2212                 return $this->dateFormatStrings[$type][$pref];
2213         }
2214
2215         /**
2216          * @param string $ts The time format which needs to be turned into a
2217          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2218          * @param bool $adj Whether to adjust the time output according to the
2219          *   user configured offset ($timecorrection)
2220          * @param mixed $format True to use user's date format preference
2221          * @param string|bool $timecorrection The time offset as returned by
2222          *   validateTimeZone() in Special:Preferences
2223          * @return string
2224          */
2225         public function date( $ts, $adj = false, $format = true, $timecorrection = false ) {
2226                 $ts = wfTimestamp( TS_MW, $ts );
2227                 if ( $adj ) {
2228                         $ts = $this->userAdjust( $ts, $timecorrection );
2229                 }
2230                 $df = $this->getDateFormatString( 'date', $this->dateFormat( $format ) );
2231                 return $this->sprintfDate( $df, $ts );
2232         }
2233
2234         /**
2235          * @param string $ts The time format which needs to be turned into a
2236          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2237          * @param bool $adj Whether to adjust the time output according to the
2238          *   user configured offset ($timecorrection)
2239          * @param mixed $format True to use user's date format preference
2240          * @param string|bool $timecorrection The time offset as returned by
2241          *   validateTimeZone() in Special:Preferences
2242          * @return string
2243          */
2244         public function time( $ts, $adj = false, $format = true, $timecorrection = false ) {
2245                 $ts = wfTimestamp( TS_MW, $ts );
2246                 if ( $adj ) {
2247                         $ts = $this->userAdjust( $ts, $timecorrection );
2248                 }
2249                 $df = $this->getDateFormatString( 'time', $this->dateFormat( $format ) );
2250                 return $this->sprintfDate( $df, $ts );
2251         }
2252
2253         /**
2254          * @param string $ts The time format which needs to be turned into a
2255          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2256          * @param bool $adj Whether to adjust the time output according to the
2257          *   user configured offset ($timecorrection)
2258          * @param mixed $format What format to return, if it's false output the
2259          *   default one (default true)
2260          * @param string|bool $timecorrection The time offset as returned by
2261          *   validateTimeZone() in Special:Preferences
2262          * @return string
2263          */
2264         public function timeanddate( $ts, $adj = false, $format = true, $timecorrection = false ) {
2265                 $ts = wfTimestamp( TS_MW, $ts );
2266                 if ( $adj ) {
2267                         $ts = $this->userAdjust( $ts, $timecorrection );
2268                 }
2269                 $df = $this->getDateFormatString( 'both', $this->dateFormat( $format ) );
2270                 return $this->sprintfDate( $df, $ts );
2271         }
2272
2273         /**
2274          * Takes a number of seconds and turns it into a text using values such as hours and minutes.
2275          *
2276          * @since 1.20
2277          *
2278          * @param int $seconds The amount of seconds.
2279          * @param array $chosenIntervals The intervals to enable.
2280          *
2281          * @return string
2282          */
2283         public function formatDuration( $seconds, array $chosenIntervals = [] ) {
2284                 $intervals = $this->getDurationIntervals( $seconds, $chosenIntervals );
2285
2286                 $segments = [];
2287
2288                 foreach ( $intervals as $intervalName => $intervalValue ) {
2289                         // Messages: duration-seconds, duration-minutes, duration-hours, duration-days, duration-weeks,
2290                         // duration-years, duration-decades, duration-centuries, duration-millennia
2291                         $message = wfMessage( 'duration-' . $intervalName )->numParams( $intervalValue );
2292                         $segments[] = $message->inLanguage( $this )->escaped();
2293                 }
2294
2295                 return $this->listToText( $segments );
2296         }
2297
2298         /**
2299          * Takes a number of seconds and returns an array with a set of corresponding intervals.
2300          * For example 65 will be turned into array( minutes => 1, seconds => 5 ).
2301          *
2302          * @since 1.20
2303          *
2304          * @param int $seconds The amount of seconds.
2305          * @param array $chosenIntervals The intervals to enable.
2306          *
2307          * @return array
2308          */
2309         public function getDurationIntervals( $seconds, array $chosenIntervals = [] ) {
2310                 if ( empty( $chosenIntervals ) ) {
2311                         $chosenIntervals = [
2312                                 'millennia',
2313                                 'centuries',
2314                                 'decades',
2315                                 'years',
2316                                 'days',
2317                                 'hours',
2318                                 'minutes',
2319                                 'seconds'
2320                         ];
2321                 }
2322
2323                 $intervals = array_intersect_key( self::$durationIntervals, array_flip( $chosenIntervals ) );
2324                 $sortedNames = array_keys( $intervals );
2325                 $smallestInterval = array_pop( $sortedNames );
2326
2327                 $segments = [];
2328
2329                 foreach ( $intervals as $name => $length ) {
2330                         $value = floor( $seconds / $length );
2331
2332                         if ( $value > 0 || ( $name == $smallestInterval && empty( $segments ) ) ) {
2333                                 $seconds -= $value * $length;
2334                                 $segments[$name] = $value;
2335                         }
2336                 }
2337
2338                 return $segments;
2339         }
2340
2341         /**
2342          * Internal helper function for userDate(), userTime() and userTimeAndDate()
2343          *
2344          * @param string $type Can be 'date', 'time' or 'both'
2345          * @param string $ts The time format which needs to be turned into a
2346          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2347          * @param User $user User object used to get preferences for timezone and format
2348          * @param array $options Array, can contain the following keys:
2349          *   - 'timecorrection': time correction, can have the following values:
2350          *     - true: use user's preference
2351          *     - false: don't use time correction
2352          *     - int: value of time correction in minutes
2353          *   - 'format': format to use, can have the following values:
2354          *     - true: use user's preference
2355          *     - false: use default preference
2356          *     - string: format to use
2357          * @since 1.19
2358          * @return string
2359          */
2360         private function internalUserTimeAndDate( $type, $ts, User $user, array $options ) {
2361                 $ts = wfTimestamp( TS_MW, $ts );
2362                 $options += [ 'timecorrection' => true, 'format' => true ];
2363                 if ( $options['timecorrection'] !== false ) {
2364                         if ( $options['timecorrection'] === true ) {
2365                                 $offset = $user->getOption( 'timecorrection' );
2366                         } else {
2367                                 $offset = $options['timecorrection'];
2368                         }
2369                         $ts = $this->userAdjust( $ts, $offset );
2370                 }
2371                 if ( $options['format'] === true ) {
2372                         $format = $user->getDatePreference();
2373                 } else {
2374                         $format = $options['format'];
2375                 }
2376                 $df = $this->getDateFormatString( $type, $this->dateFormat( $format ) );
2377                 return $this->sprintfDate( $df, $ts );
2378         }
2379
2380         /**
2381          * Get the formatted date for the given timestamp and formatted for
2382          * the given user.
2383          *
2384          * @param mixed $ts Mixed: the time format which needs to be turned into a
2385          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2386          * @param User $user User object used to get preferences for timezone and format
2387          * @param array $options Array, can contain the following keys:
2388          *   - 'timecorrection': time correction, can have the following values:
2389          *     - true: use user's preference
2390          *     - false: don't use time correction
2391          *     - int: value of time correction in minutes
2392          *   - 'format': format to use, can have the following values:
2393          *     - true: use user's preference
2394          *     - false: use default preference
2395          *     - string: format to use
2396          * @since 1.19
2397          * @return string
2398          */
2399         public function userDate( $ts, User $user, array $options = [] ) {
2400                 return $this->internalUserTimeAndDate( 'date', $ts, $user, $options );
2401         }
2402
2403         /**
2404          * Get the formatted time for the given timestamp and formatted for
2405          * the given user.
2406          *
2407          * @param mixed $ts The time format which needs to be turned into a
2408          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2409          * @param User $user User object used to get preferences for timezone and format
2410          * @param array $options Array, can contain the following keys:
2411          *   - 'timecorrection': time correction, can have the following values:
2412          *     - true: use user's preference
2413          *     - false: don't use time correction
2414          *     - int: value of time correction in minutes
2415          *   - 'format': format to use, can have the following values:
2416          *     - true: use user's preference
2417          *     - false: use default preference
2418          *     - string: format to use
2419          * @since 1.19
2420          * @return string
2421          */
2422         public function userTime( $ts, User $user, array $options = [] ) {
2423                 return $this->internalUserTimeAndDate( 'time', $ts, $user, $options );
2424         }
2425
2426         /**
2427          * Get the formatted date and time for the given timestamp and formatted for
2428          * the given user.
2429          *
2430          * @param mixed $ts The time format which needs to be turned into a
2431          *   date('YmdHis') format with wfTimestamp(TS_MW,$ts)
2432          * @param User $user User object used to get preferences for timezone and format
2433          * @param array $options Array, can contain the following keys:
2434          *   - 'timecorrection': time correction, can have the following values:
2435          *     - true: use user's preference
2436          *     - false: don't use time correction
2437          *     - int: value of time correction in minutes
2438          *   - 'format': format to use, can have the following values:
2439          *     - true: use user's preference
2440          *     - false: use default preference
2441          *     - string: format to use
2442          * @since 1.19
2443          * @return string
2444          */
2445         public function userTimeAndDate( $ts, User $user, array $options = [] ) {
2446                 return $this->internalUserTimeAndDate( 'both', $ts, $user, $options );
2447         }
2448
2449         /**
2450          * Get the timestamp in a human-friendly relative format, e.g., "3 days ago".
2451          *
2452          * Determine the difference between the timestamp and the current time, and
2453          * generate a readable timestamp by returning "<N> <units> ago", where the
2454          * largest possible unit is used.
2455          *
2456          * @since 1.26 (Prior to 1.26 method existed but was not meant to be used directly)
2457          *
2458          * @param MWTimestamp $time
2459          * @param MWTimestamp|null $relativeTo The base timestamp to compare to (defaults to now)
2460          * @param User|null $user User the timestamp is being generated for
2461          *  (or null to use main context's user)
2462          * @return string Formatted timestamp
2463          */
2464         public function getHumanTimestamp(
2465                 MWTimestamp $time, MWTimestamp $relativeTo = null, User $user = null
2466         ) {
2467                 if ( $relativeTo === null ) {
2468                         $relativeTo = new MWTimestamp();
2469                 }
2470                 if ( $user === null ) {
2471                         $user = RequestContext::getMain()->getUser();
2472                 }
2473
2474                 // Adjust for the user's timezone.
2475                 $offsetThis = $time->offsetForUser( $user );
2476                 $offsetRel = $relativeTo->offsetForUser( $user );
2477
2478                 $ts = '';
2479                 if ( Hooks::run( 'GetHumanTimestamp', [ &$ts, $time, $relativeTo, $user, $this ] ) ) {
2480                         $ts = $this->getHumanTimestampInternal( $time, $relativeTo, $user );
2481                 }
2482
2483                 // Reset the timezone on the objects.
2484                 $time->timestamp->sub( $offsetThis );
2485                 $relativeTo->timestamp->sub( $offsetRel );
2486
2487                 return $ts;
2488         }
2489
2490         /**
2491          * Convert an MWTimestamp into a pretty human-readable timestamp using
2492          * the given user preferences and relative base time.
2493          *
2494          * @see Language::getHumanTimestamp
2495          * @param MWTimestamp $ts Timestamp to prettify
2496          * @param MWTimestamp $relativeTo Base timestamp
2497          * @param User $user User preferences to use
2498          * @return string Human timestamp
2499          * @since 1.26
2500          */
2501         private function getHumanTimestampInternal(
2502                 MWTimestamp $ts, MWTimestamp $relativeTo, User $user
2503         ) {
2504                 $diff = $ts->diff( $relativeTo );
2505                 $diffDay = (bool)( (int)$ts->timestamp->format( 'w' ) -
2506                         (int)$relativeTo->timestamp->format( 'w' ) );
2507                 $days = $diff->days ?: (int)$diffDay;
2508                 if ( $diff->invert || $days > 5
2509                         && $ts->timestamp->format( 'Y' ) !== $relativeTo->timestamp->format( 'Y' )
2510                 ) {
2511                         // Timestamps are in different years: use full timestamp
2512                         // Also do full timestamp for future dates
2513                         /**
2514                          * @todo FIXME: Add better handling of future timestamps.
2515                          */
2516                         $format = $this->getDateFormatString( 'both', $user->getDatePreference() ?: 'default' );
2517                         $ts = $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) );
2518                 } elseif ( $days > 5 ) {
2519                         // Timestamps are in same year,  but more than 5 days ago: show day and month only.
2520                         $format = $this->getDateFormatString( 'pretty', $user->getDatePreference() ?: 'default' );
2521                         $ts = $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) );
2522                 } elseif ( $days > 1 ) {
2523                         // Timestamp within the past week: show the day of the week and time
2524                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2525                         $weekday = self::$mWeekdayMsgs[$ts->timestamp->format( 'w' )];
2526                         // Messages:
2527                         // sunday-at, monday-at, tuesday-at, wednesday-at, thursday-at, friday-at, saturday-at
2528                         $ts = wfMessage( "$weekday-at" )
2529                                 ->inLanguage( $this )
2530                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2531                                 ->text();
2532                 } elseif ( $days == 1 ) {
2533                         // Timestamp was yesterday: say 'yesterday' and the time.
2534                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2535                         $ts = wfMessage( 'yesterday-at' )
2536                                 ->inLanguage( $this )
2537                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2538                                 ->text();
2539                 } elseif ( $diff->h > 1 || $diff->h == 1 && $diff->i > 30 ) {
2540                         // Timestamp was today, but more than 90 minutes ago: say 'today' and the time.
2541                         $format = $this->getDateFormatString( 'time', $user->getDatePreference() ?: 'default' );
2542                         $ts = wfMessage( 'today-at' )
2543                                 ->inLanguage( $this )
2544                                 ->params( $this->sprintfDate( $format, $ts->getTimestamp( TS_MW ) ) )
2545                                 ->text();
2546
2547                 // From here on in, the timestamp was soon enough ago so that we can simply say
2548                 // XX units ago, e.g., "2 hours ago" or "5 minutes ago"
2549                 } elseif ( $diff->h == 1 ) {
2550                         // Less than 90 minutes, but more than an hour ago.
2551                         $ts = wfMessage( 'hours-ago' )->inLanguage( $this )->numParams( 1 )->text();
2552                 } elseif ( $diff->i >= 1 ) {
2553                         // A few minutes ago.
2554                         $ts = wfMessage( 'minutes-ago' )->inLanguage( $this )->numParams( $diff->i )->text();
2555                 } elseif ( $diff->s >= 30 ) {
2556                         // Less than a minute, but more than 30 sec ago.
2557                         $ts = wfMessage( 'seconds-ago' )->inLanguage( $this )->numParams( $diff->s )->text();
2558                 } else {
2559                         // Less than 30 seconds ago.
2560                         $ts = wfMessage( 'just-now' )->text();
2561                 }
2562
2563                 return $ts;
2564         }
2565
2566         /**
2567          * @param string $key
2568          * @return array|null
2569          */
2570         public function getMessage( $key ) {
2571                 return self::$dataCache->getSubitem( $this->mCode, 'messages', $key );
2572         }
2573
2574         /**
2575          * @return array
2576          */
2577         function getAllMessages() {
2578                 return self::$dataCache->getItem( $this->mCode, 'messages' );
2579         }
2580
2581         /**
2582          * @param string $in
2583          * @param string $out
2584          * @param string $string
2585          * @return string
2586          */
2587         public function iconv( $in, $out, $string ) {
2588                 # Even with //IGNORE iconv can whine about illegal characters in
2589                 # *input* string. We just ignore those too.
2590                 # REF: http://bugs.php.net/bug.php?id=37166
2591                 # REF: https://phabricator.wikimedia.org/T18885
2592                 MediaWiki\suppressWarnings();
2593                 $text = iconv( $in, $out . '//IGNORE', $string );
2594                 MediaWiki\restoreWarnings();
2595                 return $text;
2596         }
2597
2598         // callback functions for ucwords(), ucwordbreaks()
2599
2600         /**
2601          * @param array $matches
2602          * @return mixed|string
2603          */
2604         function ucwordbreaksCallbackAscii( $matches ) {
2605                 return $this->ucfirst( $matches[1] );
2606         }
2607
2608         /**
2609          * @param array $matches
2610          * @return string
2611          */
2612         function ucwordbreaksCallbackMB( $matches ) {
2613                 return mb_strtoupper( $matches[0] );
2614         }
2615
2616         /**
2617          * @param array $matches
2618          * @return string
2619          */
2620         function ucwordsCallbackMB( $matches ) {
2621                 return mb_strtoupper( $matches[0] );
2622         }
2623
2624         /**
2625          * Make a string's first character uppercase
2626          *
2627          * @param string $str
2628          *
2629          * @return string
2630          */
2631         public function ucfirst( $str ) {
2632                 $o = ord( $str );
2633                 if ( $o < 96 ) { // if already uppercase...
2634                         return $str;
2635                 } elseif ( $o < 128 ) {
2636                         return ucfirst( $str ); // use PHP's ucfirst()
2637                 } else {
2638                         // fall back to more complex logic in case of multibyte strings
2639                         return $this->uc( $str, true );
2640                 }
2641         }
2642
2643         /**
2644          * Convert a string to uppercase
2645          *
2646          * @param string $str
2647          * @param bool $first
2648          *
2649          * @return string
2650          */
2651         public function uc( $str, $first = false ) {
2652                 if ( $first ) {
2653                         if ( $this->isMultibyte( $str ) ) {
2654                                 return mb_strtoupper( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
2655                         } else {
2656                                 return ucfirst( $str );
2657                         }
2658                 } else {
2659                         return $this->isMultibyte( $str ) ? mb_strtoupper( $str ) : strtoupper( $str );
2660                 }
2661         }
2662
2663         /**
2664          * @param string $str
2665          * @return mixed|string
2666          */
2667         function lcfirst( $str ) {
2668                 $o = ord( $str );
2669                 if ( !$o ) {
2670                         return strval( $str );
2671                 } elseif ( $o >= 128 ) {
2672                         return $this->lc( $str, true );
2673                 } elseif ( $o > 96 ) {
2674                         return $str;
2675                 } else {
2676                         $str[0] = strtolower( $str[0] );
2677                         return $str;
2678                 }
2679         }
2680
2681         /**
2682          * @param string $str
2683          * @param bool $first
2684          * @return mixed|string
2685          */
2686         function lc( $str, $first = false ) {
2687                 if ( $first ) {
2688                         if ( $this->isMultibyte( $str ) ) {
2689                                 return mb_strtolower( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
2690                         } else {
2691                                 return strtolower( substr( $str, 0, 1 ) ) . substr( $str, 1 );
2692                         }
2693                 } else {
2694                         return $this->isMultibyte( $str ) ? mb_strtolower( $str ) : strtolower( $str );
2695                 }
2696         }
2697
2698         /**
2699          * @param string $str
2700          * @return bool
2701          */
2702         function isMultibyte( $str ) {
2703                 return strlen( $str ) !== mb_strlen( $str );
2704         }
2705
2706         /**
2707          * @param string $str
2708          * @return mixed|string
2709          */
2710         function ucwords( $str ) {
2711                 if ( $this->isMultibyte( $str ) ) {
2712                         $str = $this->lc( $str );
2713
2714                         // regexp to find first letter in each word (i.e. after each space)
2715                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)| ([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
2716
2717                         // function to use to capitalize a single char
2718                         return preg_replace_callback(
2719                                 $replaceRegexp,
2720                                 [ $this, 'ucwordsCallbackMB' ],
2721                                 $str
2722                         );
2723                 } else {
2724                         return ucwords( strtolower( $str ) );
2725                 }
2726         }
2727
2728         /**
2729          * capitalize words at word breaks
2730          *
2731          * @param string $str
2732          * @return mixed
2733          */
2734         function ucwordbreaks( $str ) {
2735                 if ( $this->isMultibyte( $str ) ) {
2736                         $str = $this->lc( $str );
2737
2738                         // since \b doesn't work for UTF-8, we explicitely define word break chars
2739                         $breaks = "[ \-\(\)\}\{\.,\?!]";
2740
2741                         // find first letter after word break
2742                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)|" .
2743                                 "$breaks([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
2744
2745                         return preg_replace_callback(
2746                                 $replaceRegexp,
2747                                 [ $this, 'ucwordbreaksCallbackMB' ],
2748                                 $str
2749                         );
2750                 } else {
2751                         return preg_replace_callback(
2752                                 '/\b([\w\x80-\xff]+)\b/',
2753                                 [ $this, 'ucwordbreaksCallbackAscii' ],
2754                                 $str
2755                         );
2756                 }
2757         }
2758
2759         /**
2760          * Return a case-folded representation of $s
2761          *
2762          * This is a representation such that caseFold($s1)==caseFold($s2) if $s1
2763          * and $s2 are the same except for the case of their characters. It is not
2764          * necessary for the value returned to make sense when displayed.
2765          *
2766          * Do *not* perform any other normalisation in this function. If a caller
2767          * uses this function when it should be using a more general normalisation
2768          * function, then fix the caller.
2769          *
2770          * @param string $s
2771          *
2772          * @return string
2773          */
2774         function caseFold( $s ) {
2775                 return $this->uc( $s );
2776         }
2777
2778         /**
2779          * @param string $s
2780          * @return string
2781          * @throws MWException
2782          */
2783         function checkTitleEncoding( $s ) {
2784                 if ( is_array( $s ) ) {
2785                         throw new MWException( 'Given array to checkTitleEncoding.' );
2786                 }
2787                 if ( StringUtils::isUtf8( $s ) ) {
2788                         return $s;
2789                 }
2790
2791                 return $this->iconv( $this->fallback8bitEncoding(), 'utf-8', $s );
2792         }
2793
2794         /**
2795          * @return array
2796          */
2797         function fallback8bitEncoding() {
2798                 return self::$dataCache->getItem( $this->mCode, 'fallback8bitEncoding' );
2799         }
2800
2801         /**
2802          * Most writing systems use whitespace to break up words.
2803          * Some languages such as Chinese don't conventionally do this,
2804          * which requires special handling when breaking up words for
2805          * searching etc.
2806          *
2807          * @return bool
2808          */
2809         function hasWordBreaks() {
2810                 return true;
2811         }
2812
2813         /**
2814          * Some languages such as Chinese require word segmentation,
2815          * Specify such segmentation when overridden in derived class.
2816          *
2817          * @param string $string
2818          * @return string
2819          */
2820         function segmentByWord( $string ) {
2821                 return $string;
2822         }
2823
2824         /**
2825          * Some languages have special punctuation need to be normalized.
2826          * Make such changes here.
2827          *
2828          * @param string $string
2829          * @return string
2830          */
2831         function normalizeForSearch( $string ) {
2832                 return self::convertDoubleWidth( $string );
2833         }
2834
2835         /**
2836          * convert double-width roman characters to single-width.
2837          * range: ff00-ff5f ~= 0020-007f
2838          *
2839          * @param string $string
2840          *
2841          * @return string
2842          */
2843         protected static function convertDoubleWidth( $string ) {
2844                 static $full = null;
2845                 static $half = null;
2846
2847                 if ( $full === null ) {
2848                         $fullWidth = "０１２３４５６７８９ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ";
2849                         $halfWidth = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
2850                         $full = str_split( $fullWidth, 3 );
2851                         $half = str_split( $halfWidth );
2852                 }
2853
2854                 $string = str_replace( $full, $half, $string );
2855                 return $string;
2856         }
2857
2858         /**
2859          * @param string $string
2860          * @param string $pattern
2861          * @return string
2862          */
2863         protected static function insertSpace( $string, $pattern ) {
2864                 $string = preg_replace( $pattern, " $1 ", $string );
2865                 $string = preg_replace( '/ +/', ' ', $string );
2866                 return $string;
2867         }
2868
2869         /**
2870          * @param array $termsArray
2871          * @return array
2872          */
2873         function convertForSearchResult( $termsArray ) {
2874                 # some languages, e.g. Chinese, need to do a conversion
2875                 # in order for search results to be displayed correctly
2876                 return $termsArray;
2877         }
2878
2879         /**
2880          * Get the first character of a string.
2881          *
2882          * @param string $s
2883          * @return string
2884          */
2885         function firstChar( $s ) {
2886                 $matches = [];
2887                 preg_match(
2888                         '/^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|' .
2889                                 '[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3})/',
2890                         $s,
2891                         $matches
2892                 );
2893
2894                 if ( isset( $matches[1] ) ) {
2895                         if ( strlen( $matches[1] ) != 3 ) {
2896                                 return $matches[1];
2897                         }
2898
2899                         // Break down Hangul syllables to grab the first jamo
2900                         $code = UtfNormal\Utils::utf8ToCodepoint( $matches[1] );
2901                         if ( $code < 0xac00 || 0xd7a4 <= $code ) {
2902                                 return $matches[1];
2903                         } elseif ( $code < 0xb098 ) {
2904                                 return "\xe3\x84\xb1";
2905                         } elseif ( $code < 0xb2e4 ) {
2906                                 return "\xe3\x84\xb4";
2907                         } elseif ( $code < 0xb77c ) {
2908                                 return "\xe3\x84\xb7";
2909                         } elseif ( $code < 0xb9c8 ) {
2910                                 return "\xe3\x84\xb9";
2911                         } elseif ( $code < 0xbc14 ) {
2912                                 return "\xe3\x85\x81";
2913                         } elseif ( $code < 0xc0ac ) {
2914                                 return "\xe3\x85\x82";
2915                         } elseif ( $code < 0xc544 ) {
2916                                 return "\xe3\x85\x85";
2917                         } elseif ( $code < 0xc790 ) {
2918                                 return "\xe3\x85\x87";
2919                         } elseif ( $code < 0xcc28 ) {
2920                                 return "\xe3\x85\x88";
2921                         } elseif ( $code < 0xce74 ) {
2922                                 return "\xe3\x85\x8a";
2923                         } elseif ( $code < 0xd0c0 ) {
2924                                 return "\xe3\x85\x8b";
2925                         } elseif ( $code < 0xd30c ) {
2926                                 return "\xe3\x85\x8c";
2927                         } elseif ( $code < 0xd558 ) {
2928                                 return "\xe3\x85\x8d";
2929                         } else {
2930                                 return "\xe3\x85\x8e";
2931                         }
2932                 } else {
2933                         return '';
2934                 }
2935         }
2936
2937         /**
2938          * @deprecated No-op since 1.28
2939          */
2940         function initEncoding() {
2941                 // No-op.
2942         }
2943
2944         /**
2945          * @param string $s
2946          * @return string
2947          * @deprecated No-op since 1.28
2948          */
2949         function recodeForEdit( $s ) {
2950                 return $s;
2951         }
2952
2953         /**
2954          * @param string $s
2955          * @return string
2956          * @deprecated No-op since 1.28
2957          */
2958         function recodeInput( $s ) {
2959                 return $s;
2960         }
2961
2962         /**
2963          * Convert a UTF-8 string to normal form C. In Malayalam and Arabic, this
2964          * also cleans up certain backwards-compatible sequences, converting them
2965          * to the modern Unicode equivalent.
2966          *
2967          * This is language-specific for performance reasons only.
2968          *
2969          * @param string $s
2970          *
2971          * @return string
2972          */
2973         function normalize( $s ) {
2974                 global $wgAllUnicodeFixes;
2975                 $s = UtfNormal\Validator::cleanUp( $s );
2976                 if ( $wgAllUnicodeFixes ) {
2977                         $s = $this->transformUsingPairFile( 'normalize-ar.ser', $s );
2978                         $s = $this->transformUsingPairFile( 'normalize-ml.ser', $s );
2979                 }
2980
2981                 return $s;
2982         }
2983
2984         /**
2985          * Transform a string using serialized data stored in the given file (which
2986          * must be in the serialized subdirectory of $IP). The file contains pairs
2987          * mapping source characters to destination characters.
2988          *
2989          * The data is cached in process memory. This will go faster if you have the
2990          * FastStringSearch extension.
2991          *
2992          * @param string $file
2993          * @param string $string
2994          *
2995          * @throws MWException
2996          * @return string
2997          */
2998         function transformUsingPairFile( $file, $string ) {
2999                 if ( !isset( $this->transformData[$file] ) ) {
3000                         $data = wfGetPrecompiledData( $file );
3001                         if ( $data === false ) {
3002                                 throw new MWException( __METHOD__ . ": The transformation file $file is missing" );
3003                         }
3004                         $this->transformData[$file] = new ReplacementArray( $data );
3005                 }
3006                 return $this->transformData[$file]->replace( $string );
3007         }
3008
3009         /**
3010          * For right-to-left language support
3011          *
3012          * @return bool
3013          */
3014         function isRTL() {
3015                 return self::$dataCache->getItem( $this->mCode, 'rtl' );
3016         }
3017
3018         /**
3019          * Return the correct HTML 'dir' attribute value for this language.
3020          * @return string
3021          */
3022         function getDir() {
3023                 return $this->isRTL() ? 'rtl' : 'ltr';
3024         }
3025
3026         /**
3027          * Return 'left' or 'right' as appropriate alignment for line-start
3028          * for this language's text direction.
3029          *
3030          * Should be equivalent to CSS3 'start' text-align value....
3031          *
3032          * @return string
3033          */
3034         function alignStart() {
3035                 return $this->isRTL() ? 'right' : 'left';
3036         }
3037
3038         /**
3039          * Return 'right' or 'left' as appropriate alignment for line-end
3040          * for this language's text direction.
3041          *
3042          * Should be equivalent to CSS3 'end' text-align value....
3043          *
3044          * @return string
3045          */
3046         function alignEnd() {
3047                 return $this->isRTL() ? 'left' : 'right';
3048         }
3049
3050         /**
3051          * A hidden direction mark (LRM or RLM), depending on the language direction.
3052          * Unlike getDirMark(), this function returns the character as an HTML entity.
3053          * This function should be used when the output is guaranteed to be HTML,
3054          * because it makes the output HTML source code more readable. When
3055          * the output is plain text or can be escaped, getDirMark() should be used.
3056          *
3057          * @param bool $opposite Get the direction mark opposite to your language
3058          * @return string
3059          * @since 1.20
3060          */
3061         function getDirMarkEntity( $opposite = false ) {
3062                 if ( $opposite ) {
3063                         return $this->isRTL() ? '&lrm;' : '&rlm;';
3064                 }
3065                 return $this->isRTL() ? '&rlm;' : '&lrm;';
3066         }
3067
3068         /**
3069          * A hidden direction mark (LRM or RLM), depending on the language direction.
3070          * This function produces them as invisible Unicode characters and
3071          * the output may be hard to read and debug, so it should only be used
3072          * when the output is plain text or can be escaped. When the output is
3073          * HTML, use getDirMarkEntity() instead.
3074          *
3075          * @param bool $opposite Get the direction mark opposite to your language
3076          * @return string
3077          */
3078         function getDirMark( $opposite = false ) {
3079                 $lrm = "\xE2\x80\x8E"; # LEFT-TO-RIGHT MARK, commonly abbreviated LRM
3080                 $rlm = "\xE2\x80\x8F"; # RIGHT-TO-LEFT MARK, commonly abbreviated RLM
3081                 if ( $opposite ) {
3082                         return $this->isRTL() ? $lrm : $rlm;
3083                 }
3084                 return $this->isRTL() ? $rlm : $lrm;
3085         }
3086
3087         /**
3088          * @return array
3089          */
3090         function capitalizeAllNouns() {
3091                 return self::$dataCache->getItem( $this->mCode, 'capitalizeAllNouns' );
3092         }
3093
3094         /**
3095          * An arrow, depending on the language direction.
3096          *
3097          * @param string $direction The direction of the arrow: forwards (default),
3098          *   backwards, left, right, up, down.
3099          * @return string
3100          */
3101         function getArrow( $direction = 'forwards' ) {
3102                 switch ( $direction ) {
3103                 case 'forwards':
3104                         return $this->isRTL() ? '←' : '→';
3105                 case 'backwards':
3106                         return $this->isRTL() ? '→' : '←';
3107                 case 'left':
3108                         return '←';
3109                 case 'right':
3110                         return '→';
3111                 case 'up':
3112                         return '↑';
3113                 case 'down':
3114                         return '↓';
3115                 }
3116         }
3117
3118         /**
3119          * To allow "foo[[bar]]" to extend the link over the whole word "foobar"
3120          *
3121          * @return bool
3122          */
3123         function linkPrefixExtension() {
3124                 return self::$dataCache->getItem( $this->mCode, 'linkPrefixExtension' );
3125         }
3126
3127         /**
3128          * Get all magic words from cache.
3129          * @return array
3130          */
3131         function getMagicWords() {
3132                 return self::$dataCache->getItem( $this->mCode, 'magicWords' );
3133         }
3134
3135         /**
3136          * Run the LanguageGetMagic hook once.
3137          */
3138         protected function doMagicHook() {
3139                 if ( $this->mMagicHookDone ) {
3140                         return;
3141                 }
3142                 $this->mMagicHookDone = true;
3143                 Hooks::run( 'LanguageGetMagic', [ &$this->mMagicExtensions, $this->getCode() ] );
3144         }
3145
3146         /**
3147          * Fill a MagicWord object with data from here
3148          *
3149          * @param MagicWord $mw
3150          */
3151         function getMagic( $mw ) {
3152                 // Saves a function call
3153                 if ( !$this->mMagicHookDone ) {
3154                         $this->doMagicHook();
3155                 }
3156
3157                 if ( isset( $this->mMagicExtensions[$mw->mId] ) ) {
3158                         $rawEntry = $this->mMagicExtensions[$mw->mId];
3159                 } else {
3160                         $rawEntry = self::$dataCache->getSubitem(
3161                                 $this->mCode, 'magicWords', $mw->mId );
3162                 }
3163
3164                 if ( !is_array( $rawEntry ) ) {
3165                         wfWarn( "\"$rawEntry\" is not a valid magic word for \"$mw->mId\"" );
3166                 } else {
3167                         $mw->mCaseSensitive = $rawEntry[0];
3168                         $mw->mSynonyms = array_slice( $rawEntry, 1 );
3169                 }
3170         }
3171
3172         /**
3173          * Add magic words to the extension array
3174          *
3175          * @param array $newWords
3176          */
3177         function addMagicWordsByLang( $newWords ) {
3178                 $fallbackChain = $this->getFallbackLanguages();
3179                 $fallbackChain = array_reverse( $fallbackChain );
3180                 foreach ( $fallbackChain as $code ) {
3181                         if ( isset( $newWords[$code] ) ) {
3182                                 $this->mMagicExtensions = $newWords[$code] + $this->mMagicExtensions;
3183                         }
3184                 }
3185         }
3186
3187         /**
3188          * Get special page names, as an associative array
3189          *   canonical name => array of valid names, including aliases
3190          * @return array
3191          */
3192         function getSpecialPageAliases() {
3193                 // Cache aliases because it may be slow to load them
3194                 if ( is_null( $this->mExtendedSpecialPageAliases ) ) {
3195                         // Initialise array
3196                         $this->mExtendedSpecialPageAliases =
3197                                 self::$dataCache->getItem( $this->mCode, 'specialPageAliases' );
3198                         Hooks::run( 'LanguageGetSpecialPageAliases',
3199                                 [ &$this->mExtendedSpecialPageAliases, $this->getCode() ] );
3200                 }
3201
3202                 return $this->mExtendedSpecialPageAliases;
3203         }
3204
3205         /**
3206          * Italic is unsuitable for some languages
3207          *
3208          * @param string $text The text to be emphasized.
3209          * @return string
3210          */
3211         function emphasize( $text ) {
3212                 return "<em>$text</em>";
3213         }
3214
3215         /**
3216          * Normally we output all numbers in plain en_US style, that is
3217          * 293,291.235 for twohundredninetythreethousand-twohundredninetyone
3218          * point twohundredthirtyfive. However this is not suitable for all
3219          * languages, some such as Bengali (bn) want ২,৯৩,২৯১.২৩৫ and others such as
3220          * Icelandic just want to use commas instead of dots, and dots instead
3221          * of commas like "293.291,235".
3222          *
3223          * An example of this function being called:
3224          * <code>
3225          * wfMessage( 'message' )->numParams( $num )->text()
3226          * </code>
3227          *
3228          * See $separatorTransformTable on MessageIs.php for
3229          * the , => . and . => , implementation.
3230          *
3231          * @todo check if it's viable to use localeconv() for the decimal separator thing.
3232          * @param int|float $number The string to be formatted, should be an integer
3233          *   or a floating point number.
3234          * @param bool $nocommafy Set to true for special numbers like dates
3235          * @return string
3236          */
3237         public function formatNum( $number, $nocommafy = false ) {
3238                 global $wgTranslateNumerals;
3239                 if ( !$nocommafy ) {
3240                         $number = $this->commafy( $number );
3241                         $s = $this->separatorTransformTable();
3242                         if ( $s ) {
3243                                 $number = strtr( $number, $s );
3244                         }
3245                 }
3246
3247                 if ( $wgTranslateNumerals ) {
3248                         $s = $this->digitTransformTable();
3249                         if ( $s ) {
3250                                 $number = strtr( $number, $s );
3251                         }
3252                 }
3253
3254                 return $number;
3255         }
3256
3257         /**
3258          * Front-end for non-commafied formatNum
3259          *
3260          * @param int|float $number The string to be formatted, should be an integer
3261          *        or a floating point number.
3262          * @since 1.21
3263          * @return string
3264          */
3265         public function formatNumNoSeparators( $number ) {
3266                 return $this->formatNum( $number, true );
3267         }
3268
3269         /**
3270          * @param string $number
3271          * @return string
3272          */
3273         public function parseFormattedNumber( $number ) {
3274                 $s = $this->digitTransformTable();
3275                 if ( $s ) {
3276                         // eliminate empty array values such as ''. (bug 64347)
3277                         $s = array_filter( $s );
3278                         $number = strtr( $number, array_flip( $s ) );
3279                 }
3280
3281                 $s = $this->separatorTransformTable();
3282                 if ( $s ) {
3283                         // eliminate empty array values such as ''. (bug 64347)
3284                         $s = array_filter( $s );
3285                         $number = strtr( $number, array_flip( $s ) );
3286                 }
3287
3288                 $number = strtr( $number, [ ',' => '' ] );
3289                 return $number;
3290         }
3291
3292         /**
3293          * Adds commas to a given number
3294          * @since 1.19
3295          * @param mixed $number
3296          * @return string
3297          */
3298         function commafy( $number ) {
3299                 $digitGroupingPattern = $this->digitGroupingPattern();
3300                 if ( $number === null ) {
3301                         return '';
3302                 }
3303
3304                 if ( !$digitGroupingPattern || $digitGroupingPattern === "###,###,###" ) {
3305                         // default grouping is at thousands,  use the same for ###,###,### pattern too.
3306                         return strrev( (string)preg_replace( '/(\d{3})(?=\d)(?!\d*\.)/', '$1,', strrev( $number ) ) );
3307                 } else {
3308                         // Ref: http://cldr.unicode.org/translation/number-patterns
3309                         $sign = "";
3310                         if ( intval( $number ) < 0 ) {
3311                                 // For negative numbers apply the algorithm like positive number and add sign.
3312                                 $sign = "-";
3313                                 $number = substr( $number, 1 );
3314                         }
3315                         $integerPart = [];
3316                         $decimalPart = [];
3317                         $numMatches = preg_match_all( "/(#+)/", $digitGroupingPattern, $matches );
3318                         preg_match( "/\d+/", $number, $integerPart );
3319                         preg_match( "/\.\d*/", $number, $decimalPart );
3320                         $groupedNumber = ( count( $decimalPart ) > 0 ) ? $decimalPart[0] : "";
3321                         if ( $groupedNumber === $number ) {
3322                                 // the string does not have any number part. Eg: .12345
3323                                 return $sign . $groupedNumber;
3324                         }
3325                         $start = $end = ( $integerPart ) ? strlen( $integerPart[0] ) : 0;
3326                         while ( $start > 0 ) {
3327                                 $match = $matches[0][$numMatches - 1];
3328                                 $matchLen = strlen( $match );
3329                                 $start = $end - $matchLen;
3330                                 if ( $start < 0 ) {
3331                                         $start = 0;
3332                                 }
3333                                 $groupedNumber = substr( $number, $start, $end -$start ) . $groupedNumber;
3334                                 $end = $start;
3335                                 if ( $numMatches > 1 ) {
3336                                         // use the last pattern for the rest of the number
3337                                         $numMatches--;
3338                                 }
3339                                 if ( $start > 0 ) {
3340                                         $groupedNumber = "," . $groupedNumber;
3341                                 }
3342                         }
3343                         return $sign . $groupedNumber;
3344                 }
3345         }
3346
3347         /**
3348          * @return string
3349          */
3350         function digitGroupingPattern() {
3351                 return self::$dataCache->getItem( $this->mCode, 'digitGroupingPattern' );
3352         }
3353
3354         /**
3355          * @return array
3356          */
3357         function digitTransformTable() {
3358                 return self::$dataCache->getItem( $this->mCode, 'digitTransformTable' );
3359         }
3360
3361         /**
3362          * @return array
3363          */
3364         function separatorTransformTable() {
3365                 return self::$dataCache->getItem( $this->mCode, 'separatorTransformTable' );
3366         }
3367
3368         /**
3369          * Take a list of strings and build a locale-friendly comma-separated
3370          * list, using the local comma-separator message.
3371          * The last two strings are chained with an "and".
3372          * NOTE: This function will only work with standard numeric array keys (0, 1, 2…)
3373          *
3374          * @param string[] $l
3375          * @return string
3376          */
3377         function listToText( array $l ) {
3378                 $m = count( $l ) - 1;
3379                 if ( $m < 0 ) {
3380                         return '';
3381                 }
3382                 if ( $m > 0 ) {
3383                         $and = $this->msg( 'and' )->escaped();
3384                         $space = $this->msg( 'word-separator' )->escaped();
3385                         if ( $m > 1 ) {
3386                                 $comma = $this->msg( 'comma-separator' )->escaped();
3387                         }
3388                 }
3389                 $s = $l[$m];
3390                 for ( $i = $m - 1; $i >= 0; $i-- ) {
3391                         if ( $i == $m - 1 ) {
3392                                 $s = $l[$i] . $and . $space . $s;
3393                         } else {
3394                                 $s = $l[$i] . $comma . $s;
3395                         }
3396                 }
3397                 return $s;
3398         }
3399
3400         /**
3401          * Take a list of strings and build a locale-friendly comma-separated
3402          * list, using the local comma-separator message.
3403          * @param string[] $list Array of strings to put in a comma list
3404          * @return string
3405          */
3406         function commaList( array $list ) {
3407                 return implode(
3408                         wfMessage( 'comma-separator' )->inLanguage( $this )->escaped(),
3409                         $list
3410                 );
3411         }
3412
3413         /**
3414          * Take a list of strings and build a locale-friendly semicolon-separated
3415          * list, using the local semicolon-separator message.
3416          * @param string[] $list Array of strings to put in a semicolon list
3417          * @return string
3418          */
3419         function semicolonList( array $list ) {
3420                 return implode(
3421                         wfMessage( 'semicolon-separator' )->inLanguage( $this )->escaped(),
3422                         $list
3423                 );
3424         }
3425
3426         /**
3427          * Same as commaList, but separate it with the pipe instead.
3428          * @param string[] $list Array of strings to put in a pipe list
3429          * @return string
3430          */
3431         function pipeList( array $list ) {
3432                 return implode(
3433                         wfMessage( 'pipe-separator' )->inLanguage( $this )->escaped(),
3434                         $list
3435                 );
3436         }
3437
3438         /**
3439          * Truncate a string to a specified length in bytes, appending an optional
3440          * string (e.g. for ellipses)
3441          *
3442          * The database offers limited byte lengths for some columns in the database;
3443          * multi-byte character sets mean we need to ensure that only whole characters
3444          * are included, otherwise broken characters can be passed to the user
3445          *
3446          * If $length is negative, the string will be truncated from the beginning
3447          *
3448          * @param string $string String to truncate
3449          * @param int $length Maximum length (including ellipses)
3450          * @param string $ellipsis String to append to the truncated text
3451          * @param bool $adjustLength Subtract length of ellipsis from $length.
3452          *      $adjustLength was introduced in 1.18, before that behaved as if false.
3453          * @return string
3454          */
3455         function truncate( $string, $length, $ellipsis = '...', $adjustLength = true ) {
3456                 # Use the localized ellipsis character
3457                 if ( $ellipsis == '...' ) {
3458                         $ellipsis = wfMessage( 'ellipsis' )->inLanguage( $this )->escaped();
3459                 }
3460                 # Check if there is no need to truncate
3461                 if ( $length == 0 ) {
3462                         return $ellipsis; // convention
3463                 } elseif ( strlen( $string ) <= abs( $length ) ) {
3464                         return $string; // no need to truncate
3465                 }
3466                 $stringOriginal = $string;
3467                 # If ellipsis length is >= $length then we can't apply $adjustLength
3468                 if ( $adjustLength && strlen( $ellipsis ) >= abs( $length ) ) {
3469                         $string = $ellipsis; // this can be slightly unexpected
3470                 # Otherwise, truncate and add ellipsis...
3471                 } else {
3472                         $eLength = $adjustLength ? strlen( $ellipsis ) : 0;
3473                         if ( $length > 0 ) {
3474                                 $length -= $eLength;
3475                                 $string = substr( $string, 0, $length ); // xyz...
3476                                 $string = $this->removeBadCharLast( $string );
3477                                 $string = rtrim( $string );
3478                                 $string = $string . $ellipsis;
3479                         } else {
3480                                 $length += $eLength;
3481                                 $string = substr( $string, $length ); // ...xyz
3482                                 $string = $this->removeBadCharFirst( $string );
3483                                 $string = ltrim( $string );
3484                                 $string = $ellipsis . $string;
3485                         }
3486                 }
3487                 # Do not truncate if the ellipsis makes the string longer/equal (bug 22181).
3488                 # This check is *not* redundant if $adjustLength, due to the single case where
3489                 # LEN($ellipsis) > ABS($limit arg); $stringOriginal could be shorter than $string.
3490                 if ( strlen( $string ) < strlen( $stringOriginal ) ) {
3491                         return $string;
3492                 } else {
3493                         return $stringOriginal;
3494                 }
3495         }
3496
3497         /**
3498          * Remove bytes that represent an incomplete Unicode character
3499          * at the end of string (e.g. bytes of the char are missing)
3500          *
3501          * @param string $string
3502          * @return string
3503          */
3504         protected function removeBadCharLast( $string ) {
3505                 if ( $string != '' ) {
3506                         $char = ord( $string[strlen( $string ) - 1] );
3507                         $m = [];
3508                         if ( $char >= 0xc0 ) {
3509                                 # We got the first byte only of a multibyte char; remove it.
3510                                 $string = substr( $string, 0, -1 );
3511                         } elseif ( $char >= 0x80 &&
3512                                 // Use the /s modifier (PCRE_DOTALL) so (.*) also matches newlines
3513                                 preg_match( '/^(.*)(?:[\xe0-\xef][\x80-\xbf]|' .
3514                                         '[\xf0-\xf7][\x80-\xbf]{1,2})$/s', $string, $m )
3515                         ) {
3516                                 # We chopped in the middle of a character; remove it
3517                                 $string = $m[1];
3518                         }
3519                 }
3520                 return $string;
3521         }
3522
3523         /**
3524          * Remove bytes that represent an incomplete Unicode character
3525          * at the start of string (e.g. bytes of the char are missing)
3526          *
3527          * @param string $string
3528          * @return string
3529          */
3530         protected function removeBadCharFirst( $string ) {
3531                 if ( $string != '' ) {
3532                         $char = ord( $string[0] );
3533                         if ( $char >= 0x80 && $char < 0xc0 ) {
3534                                 # We chopped in the middle of a character; remove the whole thing
3535                                 $string = preg_replace( '/^[\x80-\xbf]+/', '', $string );
3536                         }
3537                 }
3538                 return $string;
3539         }
3540
3541         /**
3542          * Truncate a string of valid HTML to a specified length in bytes,
3543          * appending an optional string (e.g. for ellipses), and return valid HTML
3544          *
3545          * This is only intended for styled/linked text, such as HTML with
3546          * tags like <span> and <a>, were the tags are self-contained (valid HTML).
3547          * Also, this will not detect things like "display:none" CSS.
3548          *
3549          * Note: since 1.18 you do not need to leave extra room in $length for ellipses.
3550          *
3551          * @param string $text HTML string to truncate
3552          * @param int $length (zero/positive) Maximum length (including ellipses)
3553          * @param string $ellipsis String to append to the truncated text
3554          * @return string
3555          */
3556         function truncateHtml( $text, $length, $ellipsis = '...' ) {
3557                 # Use the localized ellipsis character
3558                 if ( $ellipsis == '...' ) {
3559                         $ellipsis = wfMessage( 'ellipsis' )->inLanguage( $this )->escaped();
3560                 }
3561                 # Check if there is clearly no need to truncate
3562                 if ( $length <= 0 ) {
3563                         return $ellipsis; // no text shown, nothing to format (convention)
3564                 } elseif ( strlen( $text ) <= $length ) {
3565                         return $text; // string short enough even *with* HTML (short-circuit)
3566                 }
3567
3568                 $dispLen = 0; // innerHTML legth so far
3569                 $testingEllipsis = false; // checking if ellipses will make string longer/equal?
3570                 $tagType = 0; // 0-open, 1-close
3571                 $bracketState = 0; // 1-tag start, 2-tag name, 0-neither
3572                 $entityState = 0; // 0-not entity, 1-entity
3573                 $tag = $ret = ''; // accumulated tag name, accumulated result string
3574                 $openTags = []; // open tag stack
3575                 $maybeState = null; // possible truncation state
3576
3577                 $textLen = strlen( $text );
3578                 $neLength = max( 0, $length - strlen( $ellipsis ) ); // non-ellipsis len if truncated
3579                 for ( $pos = 0; true; ++$pos ) {
3580                         # Consider truncation once the display length has reached the maximim.
3581                         # We check if $dispLen > 0 to grab tags for the $neLength = 0 case.
3582                         # Check that we're not in the middle of a bracket/entity...
3583                         if ( $dispLen && $dispLen >= $neLength && $bracketState == 0 && !$entityState ) {
3584                                 if ( !$testingEllipsis ) {
3585                                         $testingEllipsis = true;
3586                                         # Save where we are; we will truncate here unless there turn out to
3587                                         # be so few remaining characters that truncation is not necessary.
3588                                         if ( !$maybeState ) { // already saved? ($neLength = 0 case)
3589                                                 $maybeState = [ $ret, $openTags ]; // save state
3590                                         }
3591                                 } elseif ( $dispLen > $length && $dispLen > strlen( $ellipsis ) ) {
3592                                         # String in fact does need truncation, the truncation point was OK.
3593                                         list( $ret, $openTags ) = $maybeState; // reload state
3594                                         $ret = $this->removeBadCharLast( $ret ); // multi-byte char fix
3595                                         $ret .= $ellipsis; // add ellipsis
3596                                         break;
3597                                 }
3598                         }
3599                         if ( $pos >= $textLen ) {
3600                                 break; // extra iteration just for above checks
3601                         }
3602
3603                         # Read the next char...
3604                         $ch = $text[$pos];
3605                         $lastCh = $pos ? $text[$pos - 1] : '';
3606                         $ret .= $ch; // add to result string
3607                         if ( $ch == '<' ) {
3608                                 $this->truncate_endBracket( $tag, $tagType, $lastCh, $openTags ); // for bad HTML
3609                                 $entityState = 0; // for bad HTML
3610                                 $bracketState = 1; // tag started (checking for backslash)
3611                         } elseif ( $ch == '>' ) {
3612                                 $this->truncate_endBracket( $tag, $tagType, $lastCh, $openTags );
3613                                 $entityState = 0; // for bad HTML
3614                                 $bracketState = 0; // out of brackets
3615                         } elseif ( $bracketState == 1 ) {
3616                                 if ( $ch == '/' ) {
3617                                         $tagType = 1; // close tag (e.g. "</span>")
3618                                 } else {
3619                                         $tagType = 0; // open tag (e.g. "<span>")
3620                                         $tag .= $ch;
3621                                 }
3622                                 $bracketState = 2; // building tag name
3623                         } elseif ( $bracketState == 2 ) {
3624                                 if ( $ch != ' ' ) {
3625                                         $tag .= $ch;
3626                                 } else {
3627                                         // Name found (e.g. "<a href=..."), add on tag attributes...
3628                                         $pos += $this->truncate_skip( $ret, $text, "<>", $pos + 1 );
3629                                 }
3630                         } elseif ( $bracketState == 0 ) {
3631                                 if ( $entityState ) {
3632                                         if ( $ch == ';' ) {
3633                                                 $entityState = 0;
3634                                                 $dispLen++; // entity is one displayed char
3635                                         }
3636                                 } else {
3637                                         if ( $neLength == 0 && !$maybeState ) {
3638                                                 // Save state without $ch. We want to *hit* the first
3639                                                 // display char (to get tags) but not *use* it if truncating.
3640                                                 $maybeState = [ substr( $ret, 0, -1 ), $openTags ];
3641                                         }
3642                                         if ( $ch == '&' ) {
3643                                                 $entityState = 1; // entity found, (e.g. "&#160;")
3644                                         } else {
3645                                                 $dispLen++; // this char is displayed
3646                                                 // Add the next $max display text chars after this in one swoop...
3647                                                 $max = ( $testingEllipsis ? $length : $neLength ) - $dispLen;
3648                                                 $skipped = $this->truncate_skip( $ret, $text, "<>&", $pos + 1, $max );
3649                                                 $dispLen += $skipped;
3650                                                 $pos += $skipped;
3651                                         }
3652                                 }
3653                         }
3654                 }
3655                 // Close the last tag if left unclosed by bad HTML
3656                 $this->truncate_endBracket( $tag, $text[$textLen - 1], $tagType, $openTags );
3657                 while ( count( $openTags ) > 0 ) {
3658                         $ret .= '</' . array_pop( $openTags ) . '>'; // close open tags
3659                 }
3660                 return $ret;
3661         }
3662
3663         /**
3664          * truncateHtml() helper function
3665          * like strcspn() but adds the skipped chars to $ret
3666          *
3667          * @param string $ret
3668          * @param string $text
3669          * @param string $search
3670          * @param int $start
3671          * @param null|int $len
3672          * @return int
3673          */
3674         private function truncate_skip( &$ret, $text, $search, $start, $len = null ) {
3675                 if ( $len === null ) {
3676                         $len = -1; // -1 means "no limit" for strcspn
3677                 } elseif ( $len < 0 ) {
3678                         $len = 0; // sanity
3679                 }
3680                 $skipCount = 0;
3681                 if ( $start < strlen( $text ) ) {
3682                         $skipCount = strcspn( $text, $search, $start, $len );
3683                         $ret .= substr( $text, $start, $skipCount );
3684                 }
3685                 return $skipCount;
3686         }
3687
3688         /**
3689          * truncateHtml() helper function
3690          * (a) push or pop $tag from $openTags as needed
3691          * (b) clear $tag value
3692          * @param string &$tag Current HTML tag name we are looking at
3693          * @param int $tagType (0-open tag, 1-close tag)
3694          * @param string $lastCh Character before the '>' that ended this tag
3695          * @param array &$openTags Open tag stack (not accounting for $tag)
3696          */
3697         private function truncate_endBracket( &$tag, $tagType, $lastCh, &$openTags ) {
3698                 $tag = ltrim( $tag );
3699                 if ( $tag != '' ) {
3700                         if ( $tagType == 0 && $lastCh != '/' ) {
3701                                 $openTags[] = $tag; // tag opened (didn't close itself)
3702                         } elseif ( $tagType == 1 ) {
3703                                 if ( $openTags && $tag == $openTags[count( $openTags ) - 1] ) {
3704                                         array_pop( $openTags ); // tag closed
3705                                 }
3706                         }
3707                         $tag = '';
3708                 }
3709         }
3710
3711         /**
3712          * Grammatical transformations, needed for inflected languages
3713          * Invoked by putting {{grammar:case|word}} in a message
3714          *
3715          * @param string $word
3716          * @param string $case
3717          * @return string
3718          */
3719         function convertGrammar( $word, $case ) {
3720                 global $wgGrammarForms;
3721                 if ( isset( $wgGrammarForms[$this->getCode()][$case][$word] ) ) {
3722                         return $wgGrammarForms[$this->getCode()][$case][$word];
3723                 }
3724
3725                 return $word;
3726         }
3727         /**
3728          * Get the grammar forms for the content language
3729          * @return array Array of grammar forms
3730          * @since 1.20
3731          */
3732         function getGrammarForms() {
3733                 global $wgGrammarForms;
3734                 if ( isset( $wgGrammarForms[$this->getCode()] )
3735                         && is_array( $wgGrammarForms[$this->getCode()] )
3736                 ) {
3737                         return $wgGrammarForms[$this->getCode()];
3738                 }
3739
3740                 return [];
3741         }
3742         /**
3743          * Provides an alternative text depending on specified gender.
3744          * Usage {{gender:username|masculine|feminine|unknown}}.
3745          * username is optional, in which case the gender of current user is used,
3746          * but only in (some) interface messages; otherwise default gender is used.
3747          *
3748          * If no forms are given, an empty string is returned. If only one form is
3749          * given, it will be returned unconditionally. These details are implied by
3750          * the caller and cannot be overridden in subclasses.
3751          *
3752          * If three forms are given, the default is to use the third (unknown) form.
3753          * If fewer than three forms are given, the default is to use the first (masculine) form.
3754          * These details can be overridden in subclasses.
3755          *
3756          * @param string $gender
3757          * @param array $forms
3758          *
3759          * @return string
3760          */
3761         function gender( $gender, $forms ) {
3762                 if ( !count( $forms ) ) {
3763                         return '';
3764                 }
3765                 $forms = $this->preConvertPlural( $forms, 2 );
3766                 if ( $gender === 'male' ) {
3767                         return $forms[0];
3768                 }
3769                 if ( $gender === 'female' ) {
3770                         return $forms[1];
3771                 }
3772                 return isset( $forms[2] ) ? $forms[2] : $forms[0];
3773         }
3774
3775         /**
3776          * Plural form transformations, needed for some languages.
3777          * For example, there are 3 form of plural in Russian and Polish,
3778          * depending on "count mod 10". See [[w:Plural]]
3779          * For English it is pretty simple.
3780          *
3781          * Invoked by putting {{plural:count|wordform1|wordform2}}
3782          * or {{plural:count|wordform1|wordform2|wordform3}}
3783          *
3784          * Example: {{plural:{{NUMBEROFARTICLES}}|article|articles}}
3785          *
3786          * @param int $count Non-localized number
3787          * @param array $forms Different plural forms
3788          * @return string Correct form of plural for $count in this language
3789          */
3790         function convertPlural( $count, $forms ) {
3791                 // Handle explicit n=pluralform cases
3792                 $forms = $this->handleExplicitPluralForms( $count, $forms );
3793                 if ( is_string( $forms ) ) {
3794                         return $forms;
3795                 }
3796                 if ( !count( $forms ) ) {
3797                         return '';
3798                 }
3799
3800                 $pluralForm = $this->getPluralRuleIndexNumber( $count );
3801                 $pluralForm = min( $pluralForm, count( $forms ) - 1 );
3802                 return $forms[$pluralForm];
3803         }
3804
3805         /**
3806          * Handles explicit plural forms for Language::convertPlural()
3807          *
3808          * In {{PLURAL:$1|0=nothing|one|many}}, 0=nothing will be returned if $1 equals zero.
3809          * If an explicitly defined plural form matches the $count, then
3810          * string value returned, otherwise array returned for further consideration
3811          * by CLDR rules or overridden convertPlural().
3812          *
3813          * @since 1.23
3814          *
3815          * @param int $count Non-localized number
3816          * @param array $forms Different plural forms
3817          *
3818          * @return array|string
3819          */
3820         protected function handleExplicitPluralForms( $count, array $forms ) {
3821                 foreach ( $forms as $index => $form ) {
3822                         if ( preg_match( '/\d+=/i', $form ) ) {
3823                                 $pos = strpos( $form, '=' );
3824                                 if ( substr( $form, 0, $pos ) === (string)$count ) {
3825                                         return substr( $form, $pos + 1 );
3826                                 }
3827                                 unset( $forms[$index] );
3828                         }
3829                 }
3830                 return array_values( $forms );
3831         }
3832
3833         /**
3834          * Checks that convertPlural was given an array and pads it to requested
3835          * amount of forms by copying the last one.
3836          *
3837          * @param array $forms Array of forms given to convertPlural
3838          * @param int $count How many forms should there be at least
3839          * @return array Padded array of forms or an exception if not an array
3840          */
3841         protected function preConvertPlural( /* Array */ $forms, $count ) {
3842                 while ( count( $forms ) < $count ) {
3843                         $forms[] = $forms[count( $forms ) - 1];
3844                 }
3845                 return $forms;
3846         }
3847
3848         /**
3849          * Wraps argument with unicode control characters for directionality safety
3850          *
3851          * This solves the problem where directionality-neutral characters at the edge of
3852          * the argument string get interpreted with the wrong directionality from the
3853          * enclosing context, giving renderings that look corrupted like "(Ben_(WMF".
3854          *
3855          * The wrapping is LRE...PDF or RLE...PDF, depending on the detected
3856          * directionality of the argument string, using the BIDI algorithm's own "First
3857          * strong directional codepoint" rule. Essentially, this works round the fact that
3858          * there is no embedding equivalent of U+2068 FSI (isolation with heuristic
3859          * direction inference). The latter is cleaner but still not widely supported.
3860          *
3861          * @param string $text Text to wrap
3862          * @return string Text, wrapped in LRE...PDF or RLE...PDF or nothing
3863          */
3864         public function embedBidi( $text = '' ) {
3865                 $dir = Language::strongDirFromContent( $text );
3866                 if ( $dir === 'ltr' ) {
3867                         // Wrap in LEFT-TO-RIGHT EMBEDDING ... POP DIRECTIONAL FORMATTING
3868                         return self::$lre . $text . self::$pdf;
3869                 }
3870                 if ( $dir === 'rtl' ) {
3871                         // Wrap in RIGHT-TO-LEFT EMBEDDING ... POP DIRECTIONAL FORMATTING
3872                         return self::$rle . $text . self::$pdf;
3873                 }
3874                 // No strong directionality: do not wrap
3875                 return $text;
3876         }
3877
3878         /**
3879          * @todo Maybe translate block durations.  Note that this function is somewhat misnamed: it
3880          * deals with translating the *duration* ("1 week", "4 days", etc), not the expiry time
3881          * (which is an absolute timestamp). Please note: do NOT add this blindly, as it is used
3882          * on old expiry lengths recorded in log entries. You'd need to provide the start date to
3883          * match up with it.
3884          *
3885          * @param string $str The validated block duration in English
3886          * @param User $user User object to use timezone from or null for $wgUser
3887          * @return string Somehow translated block duration
3888          * @see LanguageFi.php for example implementation
3889          */
3890         function translateBlockExpiry( $str, User $user = null ) {
3891                 $duration = SpecialBlock::getSuggestedDurations( $this );
3892                 foreach ( $duration as $show => $value ) {
3893                         if ( strcmp( $str, $value ) == 0 ) {
3894                                 return htmlspecialchars( trim( $show ) );
3895                         }
3896                 }
3897
3898                 if ( wfIsInfinity( $str ) ) {
3899                         foreach ( $duration as $show => $value ) {
3900                                 if ( wfIsInfinity( $value ) ) {
3901                                         return htmlspecialchars( trim( $show ) );
3902                                 }
3903                         }
3904                 }
3905
3906                 // If all else fails, return a standard duration or timestamp description.
3907                 $time = strtotime( $str, 0 );
3908                 if ( $time === false ) { // Unknown format. Return it as-is in case.
3909                         return $str;
3910                 } elseif ( $time !== strtotime( $str, 1 ) ) { // It's a relative timestamp.
3911                         // $time is relative to 0 so it's a duration length.
3912                         return $this->formatDuration( $time );
3913                 } else { // It's an absolute timestamp.
3914                         if ( $time === 0 ) {
3915                                 // wfTimestamp() handles 0 as current time instead of epoch.
3916                                 $time = '19700101000000';
3917                         }
3918                         if ( $user ) {
3919                                 return $this->userTimeAndDate( $time, $user );
3920                         }
3921                         return $this->timeanddate( $time );
3922                 }
3923         }
3924
3925         /**
3926          * languages like Chinese need to be segmented in order for the diff
3927          * to be of any use
3928          *
3929          * @param string $text
3930          * @return string
3931          */
3932         public function segmentForDiff( $text ) {
3933                 return $text;
3934         }
3935
3936         /**
3937          * and unsegment to show the result
3938          *
3939          * @param string $text
3940          * @return string
3941          */
3942         public function unsegmentForDiff( $text ) {
3943                 return $text;
3944         }
3945
3946         /**
3947          * Return the LanguageConverter used in the Language
3948          *
3949          * @since 1.19
3950          * @return LanguageConverter
3951          */
3952         public function getConverter() {
3953                 return $this->mConverter;
3954         }
3955
3956         /**
3957          * convert text to all supported variants
3958          *
3959          * @param string $text
3960          * @return array
3961          */
3962         public function autoConvertToAllVariants( $text ) {
3963                 return $this->mConverter->autoConvertToAllVariants( $text );
3964         }
3965
3966         /**
3967          * convert text to different variants of a language.
3968          *
3969          * @param string $text
3970          * @return string
3971          */
3972         public function convert( $text ) {
3973                 return $this->mConverter->convert( $text );
3974         }
3975
3976         /**
3977          * Convert a Title object to a string in the preferred variant
3978          *
3979          * @param Title $title
3980          * @return string
3981          */
3982         public function convertTitle( $title ) {
3983                 return $this->mConverter->convertTitle( $title );
3984         }
3985
3986         /**
3987          * Convert a namespace index to a string in the preferred variant
3988          *
3989          * @param int $ns
3990          * @return string
3991          */
3992         public function convertNamespace( $ns ) {
3993                 return $this->mConverter->convertNamespace( $ns );
3994         }
3995
3996         /**
3997          * Check if this is a language with variants
3998          *
3999          * @return bool
4000          */
4001         public function hasVariants() {
4002                 return count( $this->getVariants() ) > 1;
4003         }
4004
4005         /**
4006          * Check if the language has the specific variant
4007          *
4008          * @since 1.19
4009          * @param string $variant
4010          * @return bool
4011          */
4012         public function hasVariant( $variant ) {
4013                 return (bool)$this->mConverter->validateVariant( $variant );
4014         }
4015
4016         /**
4017          * Perform output conversion on a string, and encode for safe HTML output.
4018          * @param string $text Text to be converted
4019          * @param bool $isTitle Whether this conversion is for the article title
4020          * @return string
4021          * @todo this should get integrated somewhere sane
4022          */
4023         public function convertHtml( $text, $isTitle = false ) {
4024                 return htmlspecialchars( $this->convert( $text, $isTitle ) );
4025         }
4026
4027         /**
4028          * @param string $key
4029          * @return string
4030          */
4031         public function convertCategoryKey( $key ) {
4032                 return $this->mConverter->convertCategoryKey( $key );
4033         }
4034
4035         /**
4036          * Get the list of variants supported by this language
4037          * see sample implementation in LanguageZh.php
4038          *
4039          * @return array An array of language codes
4040          */
4041         public function getVariants() {
4042                 return $this->mConverter->getVariants();
4043         }
4044
4045         /**
4046          * @return string
4047          */
4048         public function getPreferredVariant() {
4049                 return $this->mConverter->getPreferredVariant();
4050         }
4051
4052         /**
4053          * @return string
4054          */
4055         public function getDefaultVariant() {
4056                 return $this->mConverter->getDefaultVariant();
4057         }
4058
4059         /**
4060          * @return string
4061          */
4062         public function getURLVariant() {
4063                 return $this->mConverter->getURLVariant();
4064         }
4065
4066         /**
4067          * If a language supports multiple variants, it is
4068          * possible that non-existing link in one variant
4069          * actually exists in another variant. this function
4070          * tries to find it. See e.g. LanguageZh.php
4071          * The input parameters may be modified upon return
4072          *
4073          * @param string &$link The name of the link
4074          * @param Title &$nt The title object of the link
4075          * @param bool $ignoreOtherCond To disable other conditions when
4076          *   we need to transclude a template or update a category's link
4077          */
4078         public function findVariantLink( &$link, &$nt, $ignoreOtherCond = false ) {
4079                 $this->mConverter->findVariantLink( $link, $nt, $ignoreOtherCond );
4080         }
4081
4082         /**
4083          * returns language specific options used by User::getPageRenderHash()
4084          * for example, the preferred language variant
4085          *
4086          * @return string
4087          */
4088         function getExtraHashOptions() {
4089                 return $this->mConverter->getExtraHashOptions();
4090         }
4091
4092         /**
4093          * For languages that support multiple variants, the title of an
4094          * article may be displayed differently in different variants. this
4095          * function returns the apporiate title defined in the body of the article.
4096          *
4097          * @return string
4098          */
4099         public function getParsedTitle() {
4100                 return $this->mConverter->getParsedTitle();
4101         }
4102
4103         /**
4104          * Refresh the cache of conversion tables when
4105          * MediaWiki:Conversiontable* is updated.
4106          *
4107          * @param Title $title The Title of the page being updated
4108          */
4109         public function updateConversionTable( Title $title ) {
4110                 $this->mConverter->updateConversionTable( $title );
4111         }
4112
4113         /**
4114          * Prepare external link text for conversion. When the text is
4115          * a URL, it shouldn't be converted, and it'll be wrapped in
4116          * the "raw" tag (-{R| }-) to prevent conversion.
4117          *
4118          * This function is called "markNoConversion" for historical
4119          * reasons.
4120          *
4121          * @param string $text Text to be used for external link
4122          * @param bool $noParse Wrap it without confirming it's a real URL first
4123          * @return string The tagged text
4124          */
4125         public function markNoConversion( $text, $noParse = false ) {
4126                 // Excluding protocal-relative URLs may avoid many false positives.
4127                 if ( $noParse || preg_match( '/^(?:' . wfUrlProtocolsWithoutProtRel() . ')/', $text ) ) {
4128                         return $this->mConverter->markNoConversion( $text );
4129                 } else {
4130                         return $text;
4131                 }
4132         }
4133
4134         /**
4135          * A regular expression to match legal word-trailing characters
4136          * which should be merged onto a link of the form [[foo]]bar.
4137          *
4138          * @return string
4139          */
4140         public function linkTrail() {
4141                 return self::$dataCache->getItem( $this->mCode, 'linkTrail' );
4142         }
4143
4144         /**
4145          * A regular expression character set to match legal word-prefixing
4146          * characters which should be merged onto a link of the form foo[[bar]].
4147          *
4148          * @return string
4149          */
4150         public function linkPrefixCharset() {
4151                 return self::$dataCache->getItem( $this->mCode, 'linkPrefixCharset' );
4152         }
4153
4154         /**
4155          * Get the "parent" language which has a converter to convert a "compatible" language
4156          * (in another variant) to this language (eg. zh for zh-cn, but not en for en-gb).
4157          *
4158          * @return Language|null
4159          * @since 1.22
4160          */
4161         public function getParentLanguage() {
4162                 if ( $this->mParentLanguage !== false ) {
4163                         return $this->mParentLanguage;
4164                 }
4165
4166                 $code = explode( '-', $this->getCode() )[0];
4167                 if ( !in_array( $code, LanguageConverter::$languagesWithVariants ) ) {
4168                         $this->mParentLanguage = null;
4169                         return null;
4170                 }
4171                 $lang = Language::factory( $code );
4172                 if ( !$lang->hasVariant( $this->getCode() ) ) {
4173                         $this->mParentLanguage = null;
4174                         return null;
4175                 }
4176
4177                 $this->mParentLanguage = $lang;
4178                 return $lang;
4179         }
4180
4181         /**
4182          * Compare with an other language object
4183          *
4184          * @since 1.28
4185          * @param Language $lang
4186          * @return boolean
4187          */
4188         public function equals( Language $lang ) {
4189                 return $lang->getCode() === $this->mCode;
4190         }
4191
4192         /**
4193          * Get the internal language code for this language object
4194          *
4195          * NOTE: The return value of this function is NOT HTML-safe and must be escaped with
4196          * htmlspecialchars() or similar
4197          *
4198          * @return string
4199          */
4200         public function getCode() {
4201                 return $this->mCode;
4202         }
4203
4204         /**
4205          * Get the code in BCP 47 format which we can use
4206          * inside of html lang="" tags.
4207          *
4208          * NOTE: The return value of this function is NOT HTML-safe and must be escaped with
4209          * htmlspecialchars() or similar.
4210          *
4211          * @since 1.19
4212          * @return string
4213          */
4214         public function getHtmlCode() {
4215                 if ( is_null( $this->mHtmlCode ) ) {
4216                         $this->mHtmlCode = wfBCP47( $this->getCode() );
4217                 }
4218                 return $this->mHtmlCode;
4219         }
4220
4221         /**
4222          * @param string $code
4223          */
4224         public function setCode( $code ) {
4225                 $this->mCode = $code;
4226                 // Ensure we don't leave incorrect cached data lying around
4227                 $this->mHtmlCode = null;
4228                 $this->mParentLanguage = false;
4229         }
4230
4231         /**
4232          * Get the language code from a file name. Inverse of getFileName()
4233          * @param string $filename $prefix . $languageCode . $suffix
4234          * @param string $prefix Prefix before the language code
4235          * @param string $suffix Suffix after the language code
4236          * @return string Language code, or false if $prefix or $suffix isn't found
4237          */
4238         public static function getCodeFromFileName( $filename, $prefix = 'Language', $suffix = '.php' ) {
4239                 $m = null;
4240                 preg_match( '/' . preg_quote( $prefix, '/' ) . '([A-Z][a-z_]+)' .
4241                         preg_quote( $suffix, '/' ) . '/', $filename, $m );
4242                 if ( !count( $m ) ) {
4243                         return false;
4244                 }
4245                 return str_replace( '_', '-', strtolower( $m[1] ) );
4246         }
4247
4248         /**
4249          * @param string $code
4250          * @return string Name of the language class
4251          */
4252         public static function classFromCode( $code ) {
4253                 if ( $code == 'en' ) {
4254                         return 'Language';
4255                 } else {
4256                         return 'Language' . str_replace( '-', '_', ucfirst( $code ) );
4257                 }
4258         }
4259
4260         /**
4261          * Get the name of a file for a certain language code
4262          * @param string $prefix Prepend this to the filename
4263          * @param string $code Language code
4264          * @param string $suffix Append this to the filename
4265          * @throws MWException
4266          * @return string $prefix . $mangledCode . $suffix
4267          */
4268         public static function getFileName( $prefix = 'Language', $code, $suffix = '.php' ) {
4269                 if ( !self::isValidBuiltInCode( $code ) ) {
4270                         throw new MWException( "Invalid language code \"$code\"" );
4271                 }
4272
4273                 return $prefix . str_replace( '-', '_', ucfirst( $code ) ) . $suffix;
4274         }
4275
4276         /**
4277          * @param string $code
4278          * @return string
4279          */
4280         public static function getMessagesFileName( $code ) {
4281                 global $IP;
4282                 $file = self::getFileName( "$IP/languages/messages/Messages", $code, '.php' );
4283                 Hooks::run( 'Language::getMessagesFileName', [ $code, &$file ] );
4284                 return $file;
4285         }
4286
4287         /**
4288          * @param string $code
4289          * @return string
4290          * @throws MWException
4291          * @since 1.23
4292          */
4293         public static function getJsonMessagesFileName( $code ) {
4294                 global $IP;
4295
4296                 if ( !self::isValidBuiltInCode( $code ) ) {
4297                         throw new MWException( "Invalid language code \"$code\"" );
4298                 }
4299
4300                 return "$IP/languages/i18n/$code.json";
4301         }
4302
4303         /**
4304          * Get the first fallback for a given language.
4305          *
4306          * @param string $code
4307          *
4308          * @return bool|string
4309          */
4310         public static function getFallbackFor( $code ) {
4311                 $fallbacks = self::getFallbacksFor( $code );
4312                 if ( $fallbacks ) {
4313                         return $fallbacks[0];
4314                 }
4315                 return false;
4316         }
4317
4318         /**
4319          * Get the ordered list of fallback languages.
4320          *
4321          * @since 1.19
4322          * @param string $code Language code
4323          * @return array Non-empty array, ending in "en"
4324          */
4325         public static function getFallbacksFor( $code ) {
4326                 if ( $code === 'en' || !Language::isValidBuiltInCode( $code ) ) {
4327                         return [];
4328                 }
4329                 // For unknown languages, fallbackSequence returns an empty array,
4330                 // hardcode fallback to 'en' in that case.
4331                 return self::getLocalisationCache()->getItem( $code, 'fallbackSequence' ) ?: [ 'en' ];
4332         }
4333
4334         /**
4335          * Get the ordered list of fallback languages, ending with the fallback
4336          * language chain for the site language.
4337          *
4338          * @since 1.22
4339          * @param string $code Language code
4340          * @return array Array( fallbacks, site fallbacks )
4341          */
4342         public static function getFallbacksIncludingSiteLanguage( $code ) {
4343                 global $wgLanguageCode;
4344
4345                 // Usually, we will only store a tiny number of fallback chains, so we
4346                 // keep them in static memory.
4347                 $cacheKey = "{$code}-{$wgLanguageCode}";
4348
4349                 if ( !array_key_exists( $cacheKey, self::$fallbackLanguageCache ) ) {
4350                         $fallbacks = self::getFallbacksFor( $code );
4351
4352                         // Append the site's fallback chain, including the site language itself
4353                         $siteFallbacks = self::getFallbacksFor( $wgLanguageCode );
4354                         array_unshift( $siteFallbacks, $wgLanguageCode );
4355
4356                         // Eliminate any languages already included in the chain
4357                         $siteFallbacks = array_diff( $siteFallbacks, $fallbacks );
4358
4359                         self::$fallbackLanguageCache[$cacheKey] = [ $fallbacks, $siteFallbacks ];
4360                 }
4361                 return self::$fallbackLanguageCache[$cacheKey];
4362         }
4363
4364         /**
4365          * Get all messages for a given language
4366          * WARNING: this may take a long time. If you just need all message *keys*
4367          * but need the *contents* of only a few messages, consider using getMessageKeysFor().
4368          *
4369          * @param string $code
4370          *
4371          * @return array
4372          */
4373         public static function getMessagesFor( $code ) {
4374                 return self::getLocalisationCache()->getItem( $code, 'messages' );
4375         }
4376
4377         /**
4378          * Get a message for a given language
4379          *
4380          * @param string $key
4381          * @param string $code
4382          *
4383          * @return string
4384          */
4385         public static function getMessageFor( $key, $code ) {
4386                 return self::getLocalisationCache()->getSubitem( $code, 'messages', $key );
4387         }
4388
4389         /**
4390          * Get all message keys for a given language. This is a faster alternative to
4391          * array_keys( Language::getMessagesFor( $code ) )
4392          *
4393          * @since 1.19
4394          * @param string $code Language code
4395          * @return array Array of message keys (strings)
4396          */
4397         public static function getMessageKeysFor( $code ) {
4398                 return self::getLocalisationCache()->getSubitemList( $code, 'messages' );
4399         }
4400
4401         /**
4402          * @param string $talk
4403          * @return mixed
4404          */
4405         function fixVariableInNamespace( $talk ) {
4406                 if ( strpos( $talk, '$1' ) === false ) {
4407                         return $talk;
4408                 }
4409
4410                 global $wgMetaNamespace;
4411                 $talk = str_replace( '$1', $wgMetaNamespace, $talk );
4412
4413                 # Allow grammar transformations
4414                 # Allowing full message-style parsing would make simple requests
4415                 # such as action=raw much more expensive than they need to be.
4416                 # This will hopefully cover most cases.
4417                 $talk = preg_replace_callback( '/{{grammar:(.*?)\|(.*?)}}/i',
4418                         [ &$this, 'replaceGrammarInNamespace' ], $talk );
4419                 return str_replace( ' ', '_', $talk );
4420         }
4421
4422         /**
4423          * @param string $m
4424          * @return string
4425          */
4426         function replaceGrammarInNamespace( $m ) {
4427                 return $this->convertGrammar( trim( $m[2] ), trim( $m[1] ) );
4428         }
4429
4430         /**
4431          * Decode an expiry (block, protection, etc) which has come from the DB
4432          *
4433          * @param string $expiry Database expiry String
4434          * @param bool|int $format True to process using language functions, or TS_ constant
4435          *     to return the expiry in a given timestamp
4436          * @param string $infinity If $format is not true, use this string for infinite expiry
4437          * @return string
4438          * @since 1.18
4439          */
4440         public function formatExpiry( $expiry, $format = true, $infinity = 'infinity' ) {
4441                 static $dbInfinity;
4442                 if ( $dbInfinity === null ) {
4443                         $dbInfinity = wfGetDB( DB_SLAVE )->getInfinity();
4444                 }
4445
4446                 if ( $expiry == '' || $expiry === 'infinity' || $expiry == $dbInfinity ) {
4447                         return $format === true
4448                                 ? $this->getMessageFromDB( 'infiniteblock' )
4449                                 : $infinity;
4450                 } else {
4451                         return $format === true
4452                                 ? $this->timeanddate( $expiry, /* User preference timezone */ true )
4453                                 : wfTimestamp( $format, $expiry );
4454                 }
4455         }
4456
4457         /**
4458          * @todo Document
4459          * @param int|float $seconds
4460          * @param array $format Optional
4461          *   If $format['avoid'] === 'avoidseconds': don't mention seconds if $seconds >= 1 hour.
4462          *   If $format['avoid'] === 'avoidminutes': don't mention seconds/minutes if $seconds > 48 hours.
4463          *   If $format['noabbrevs'] is true: use 'seconds' and friends instead of 'seconds-abbrev'
4464          *     and friends.
4465          *   For backwards compatibility, $format may also be one of the strings 'avoidseconds'
4466          *     or 'avoidminutes'.
4467          * @return string
4468          */
4469         function formatTimePeriod( $seconds, $format = [] ) {
4470                 if ( !is_array( $format ) ) {
4471                         $format = [ 'avoid' => $format ]; // For backwards compatibility
4472                 }
4473                 if ( !isset( $format['avoid'] ) ) {
4474                         $format['avoid'] = false;
4475                 }
4476                 if ( !isset( $format['noabbrevs'] ) ) {
4477                         $format['noabbrevs'] = false;
4478                 }
4479                 $secondsMsg = wfMessage(
4480                         $format['noabbrevs'] ? 'seconds' : 'seconds-abbrev' )->inLanguage( $this );
4481                 $minutesMsg = wfMessage(
4482                         $format['noabbrevs'] ? 'minutes' : 'minutes-abbrev' )->inLanguage( $this );
4483                 $hoursMsg = wfMessage(
4484                         $format['noabbrevs'] ? 'hours' : 'hours-abbrev' )->inLanguage( $this );
4485                 $daysMsg = wfMessage(
4486                         $format['noabbrevs'] ? 'days' : 'days-abbrev' )->inLanguage( $this );
4487
4488                 if ( round( $seconds * 10 ) < 100 ) {
4489                         $s = $this->formatNum( sprintf( "%.1f", round( $seconds * 10 ) / 10 ) );
4490                         $s = $secondsMsg->params( $s )->text();
4491                 } elseif ( round( $seconds ) < 60 ) {
4492                         $s = $this->formatNum( round( $seconds ) );
4493                         $s = $secondsMsg->params( $s )->text();
4494                 } elseif ( round( $seconds ) < 3600 ) {
4495                         $minutes = floor( $seconds / 60 );
4496                         $secondsPart = round( fmod( $seconds, 60 ) );
4497                         if ( $secondsPart == 60 ) {
4498                                 $secondsPart = 0;
4499                                 $minutes++;
4500                         }
4501                         $s = $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4502                         $s .= ' ';
4503                         $s .= $secondsMsg->params( $this->formatNum( $secondsPart ) )->text();
4504                 } elseif ( round( $seconds ) <= 2 * 86400 ) {
4505                         $hours = floor( $seconds / 3600 );
4506                         $minutes = floor( ( $seconds - $hours * 3600 ) / 60 );
4507                         $secondsPart = round( $seconds - $hours * 3600 - $minutes * 60 );
4508                         if ( $secondsPart == 60 ) {
4509                                 $secondsPart = 0;
4510                                 $minutes++;
4511                         }
4512                         if ( $minutes == 60 ) {
4513                                 $minutes = 0;
4514                                 $hours++;
4515                         }
4516                         $s = $hoursMsg->params( $this->formatNum( $hours ) )->text();
4517                         $s .= ' ';
4518                         $s .= $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4519                         if ( !in_array( $format['avoid'], [ 'avoidseconds', 'avoidminutes' ] ) ) {
4520                                 $s .= ' ' . $secondsMsg->params( $this->formatNum( $secondsPart ) )->text();
4521                         }
4522                 } else {
4523                         $days = floor( $seconds / 86400 );
4524                         if ( $format['avoid'] === 'avoidminutes' ) {
4525                                 $hours = round( ( $seconds - $days * 86400 ) / 3600 );
4526                                 if ( $hours == 24 ) {
4527                                         $hours = 0;
4528                                         $days++;
4529                                 }
4530                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4531                                 $s .= ' ';
4532                                 $s .= $hoursMsg->params( $this->formatNum( $hours ) )->text();
4533                         } elseif ( $format['avoid'] === 'avoidseconds' ) {
4534                                 $hours = floor( ( $seconds - $days * 86400 ) / 3600 );
4535                                 $minutes = round( ( $seconds - $days * 86400 - $hours * 3600 ) / 60 );
4536                                 if ( $minutes == 60 ) {
4537                                         $minutes = 0;
4538                                         $hours++;
4539                                 }
4540                                 if ( $hours == 24 ) {
4541                                         $hours = 0;
4542                                         $days++;
4543                                 }
4544                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4545                                 $s .= ' ';
4546                                 $s .= $hoursMsg->params( $this->formatNum( $hours ) )->text();
4547                                 $s .= ' ';
4548                                 $s .= $minutesMsg->params( $this->formatNum( $minutes ) )->text();
4549                         } else {
4550                                 $s = $daysMsg->params( $this->formatNum( $days ) )->text();
4551                                 $s .= ' ';
4552                                 $s .= $this->formatTimePeriod( $seconds - $days * 86400, $format );
4553                         }
4554                 }
4555                 return $s;
4556         }
4557
4558         /**
4559          * Format a bitrate for output, using an appropriate
4560          * unit (bps, kbps, Mbps, Gbps, Tbps, Pbps, Ebps, Zbps or Ybps) according to
4561          *   the magnitude in question.
4562          *
4563          * This use base 1000. For base 1024 use formatSize(), for another base
4564          * see formatComputingNumbers().
4565          *
4566          * @param int $bps
4567          * @return string
4568          */
4569         function formatBitrate( $bps ) {
4570                 return $this->formatComputingNumbers( $bps, 1000, "bitrate-$1bits" );
4571         }
4572
4573         /**
4574          * @param int $size Size of the unit
4575          * @param int $boundary Size boundary (1000, or 1024 in most cases)
4576          * @param string $messageKey Message key to be uesd
4577          * @return string
4578          */
4579         function formatComputingNumbers( $size, $boundary, $messageKey ) {
4580                 if ( $size <= 0 ) {
4581                         return str_replace( '$1', $this->formatNum( $size ),
4582                                 $this->getMessageFromDB( str_replace( '$1', '', $messageKey ) )
4583                         );
4584                 }
4585                 $sizes = [ '', 'kilo', 'mega', 'giga', 'tera', 'peta', 'exa', 'zeta', 'yotta' ];
4586                 $index = 0;
4587
4588                 $maxIndex = count( $sizes ) - 1;
4589                 while ( $size >= $boundary && $index < $maxIndex ) {
4590                         $index++;
4591                         $size /= $boundary;
4592                 }
4593
4594                 // For small sizes no decimal places necessary
4595                 $round = 0;
4596                 if ( $index > 1 ) {
4597                         // For MB and bigger two decimal places are smarter
4598                         $round = 2;
4599                 }
4600                 $msg = str_replace( '$1', $sizes[$index], $messageKey );
4601
4602                 $size = round( $size, $round );
4603                 $text = $this->getMessageFromDB( $msg );
4604                 return str_replace( '$1', $this->formatNum( $size ), $text );
4605         }
4606
4607         /**
4608          * Format a size in bytes for output, using an appropriate
4609          * unit (B, KB, MB, GB, TB, PB, EB, ZB or YB) according to the magnitude in question
4610          *
4611          * This method use base 1024. For base 1000 use formatBitrate(), for
4612          * another base see formatComputingNumbers()
4613          *
4614          * @param int $size Size to format
4615          * @return string Plain text (not HTML)
4616          */
4617         function formatSize( $size ) {
4618                 return $this->formatComputingNumbers( $size, 1024, "size-$1bytes" );
4619         }
4620
4621         /**
4622          * Make a list item, used by various special pages
4623          *
4624          * @param string $page Page link
4625          * @param string $details HTML safe text between brackets
4626          * @param bool $oppositedm Add the direction mark opposite to your
4627          *   language, to display text properly
4628          * @return HTML escaped string
4629          */
4630         function specialList( $page, $details, $oppositedm = true ) {
4631                 if ( !$details ) {
4632                         return $page;
4633                 }
4634
4635                 $dirmark = ( $oppositedm ? $this->getDirMark( true ) : '' ) . $this->getDirMark();
4636                 return
4637                         $page .
4638                         $dirmark .
4639                         $this->msg( 'word-separator' )->escaped() .
4640                         $this->msg( 'parentheses' )->rawParams( $details )->escaped();
4641         }
4642
4643         /**
4644          * Generate (prev x| next x) (20|50|100...) type links for paging
4645          *
4646          * @param Title $title Title object to link
4647          * @param int $offset
4648          * @param int $limit
4649          * @param array $query Optional URL query parameter string
4650          * @param bool $atend Optional param for specified if this is the last page
4651          * @return string
4652          */
4653         public function viewPrevNext( Title $title, $offset, $limit,
4654                 array $query = [], $atend = false
4655         ) {
4656                 // @todo FIXME: Why on earth this needs one message for the text and another one for tooltip?
4657
4658                 # Make 'previous' link
4659                 $prev = wfMessage( 'prevn' )->inLanguage( $this )->title( $title )->numParams( $limit )->text();
4660                 if ( $offset > 0 ) {
4661                         $plink = $this->numLink( $title, max( $offset - $limit, 0 ), $limit,
4662                                 $query, $prev, 'prevn-title', 'mw-prevlink' );
4663                 } else {
4664                         $plink = htmlspecialchars( $prev );
4665                 }
4666
4667                 # Make 'next' link
4668                 $next = wfMessage( 'nextn' )->inLanguage( $this )->title( $title )->numParams( $limit )->text();
4669                 if ( $atend ) {
4670                         $nlink = htmlspecialchars( $next );
4671                 } else {
4672                         $nlink = $this->numLink( $title, $offset + $limit, $limit,
4673                                 $query, $next, 'nextn-title', 'mw-nextlink' );
4674                 }
4675
4676                 # Make links to set number of items per page
4677                 $numLinks = [];
4678                 foreach ( [ 20, 50, 100, 250, 500 ] as $num ) {
4679                         $numLinks[] = $this->numLink( $title, $offset, $num,
4680                                 $query, $this->formatNum( $num ), 'shown-title', 'mw-numlink' );
4681                 }
4682
4683                 return wfMessage( 'viewprevnext' )->inLanguage( $this )->title( $title
4684                         )->rawParams( $plink, $nlink, $this->pipeList( $numLinks ) )->escaped();
4685         }
4686
4687         /**
4688          * Helper function for viewPrevNext() that generates links
4689          *
4690          * @param Title $title Title object to link
4691          * @param int $offset
4692          * @param int $limit
4693          * @param array $query Extra query parameters
4694          * @param string $link Text to use for the link; will be escaped
4695          * @param string $tooltipMsg Name of the message to use as tooltip
4696          * @param string $class Value of the "class" attribute of the link
4697          * @return string HTML fragment
4698          */
4699         private function numLink( Title $title, $offset, $limit, array $query, $link,
4700                 $tooltipMsg, $class
4701         ) {
4702                 $query = [ 'limit' => $limit, 'offset' => $offset ] + $query;
4703                 $tooltip = wfMessage( $tooltipMsg )->inLanguage( $this )->title( $title )
4704                         ->numParams( $limit )->text();
4705
4706                 return Html::element( 'a', [ 'href' => $title->getLocalURL( $query ),
4707                         'title' => $tooltip, 'class' => $class ], $link );
4708         }
4709
4710         /**
4711          * Get the conversion rule title, if any.
4712          *
4713          * @return string
4714          */
4715         public function getConvRuleTitle() {
4716                 return $this->mConverter->getConvRuleTitle();
4717         }
4718
4719         /**
4720          * Get the compiled plural rules for the language
4721          * @since 1.20
4722          * @return array Associative array with plural form, and plural rule as key-value pairs
4723          */
4724         public function getCompiledPluralRules() {
4725                 $pluralRules = self::$dataCache->getItem( strtolower( $this->mCode ), 'compiledPluralRules' );
4726                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4727                 if ( !$pluralRules ) {
4728                         foreach ( $fallbacks as $fallbackCode ) {
4729                                 $pluralRules = self::$dataCache->getItem( strtolower( $fallbackCode ), 'compiledPluralRules' );
4730                                 if ( $pluralRules ) {
4731                                         break;
4732                                 }
4733                         }
4734                 }
4735                 return $pluralRules;
4736         }
4737
4738         /**
4739          * Get the plural rules for the language
4740          * @since 1.20
4741          * @return array Associative array with plural form number and plural rule as key-value pairs
4742          */
4743         public function getPluralRules() {
4744                 $pluralRules = self::$dataCache->getItem( strtolower( $this->mCode ), 'pluralRules' );
4745                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4746                 if ( !$pluralRules ) {
4747                         foreach ( $fallbacks as $fallbackCode ) {
4748                                 $pluralRules = self::$dataCache->getItem( strtolower( $fallbackCode ), 'pluralRules' );
4749                                 if ( $pluralRules ) {
4750                                         break;
4751                                 }
4752                         }
4753                 }
4754                 return $pluralRules;
4755         }
4756
4757         /**
4758          * Get the plural rule types for the language
4759          * @since 1.22
4760          * @return array Associative array with plural form number and plural rule type as key-value pairs
4761          */
4762         public function getPluralRuleTypes() {
4763                 $pluralRuleTypes = self::$dataCache->getItem( strtolower( $this->mCode ), 'pluralRuleTypes' );
4764                 $fallbacks = Language::getFallbacksFor( $this->mCode );
4765                 if ( !$pluralRuleTypes ) {
4766                         foreach ( $fallbacks as $fallbackCode ) {
4767                                 $pluralRuleTypes = self::$dataCache->getItem( strtolower( $fallbackCode ), 'pluralRuleTypes' );
4768                                 if ( $pluralRuleTypes ) {
4769                                         break;
4770                                 }
4771                         }
4772                 }
4773                 return $pluralRuleTypes;
4774         }
4775
4776         /**
4777          * Find the index number of the plural rule appropriate for the given number
4778          * @param int $number
4779          * @return int The index number of the plural rule
4780          */
4781         public function getPluralRuleIndexNumber( $number ) {
4782                 $pluralRules = $this->getCompiledPluralRules();
4783                 $form = Evaluator::evaluateCompiled( $number, $pluralRules );
4784                 return $form;
4785         }
4786
4787         /**
4788          * Find the plural rule type appropriate for the given number
4789          * For example, if the language is set to Arabic, getPluralType(5) should
4790          * return 'few'.
4791          * @since 1.22
4792          * @param int $number
4793          * @return string The name of the plural rule type, e.g. one, two, few, many
4794          */
4795         public function getPluralRuleType( $number ) {
4796                 $index = $this->getPluralRuleIndexNumber( $number );
4797                 $pluralRuleTypes = $this->getPluralRuleTypes();
4798                 if ( isset( $pluralRuleTypes[$index] ) ) {
4799                         return $pluralRuleTypes[$index];
4800                 } else {
4801                         return 'other';
4802                 }
4803         }
4804 }