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