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