includes/specials/SpecialVersion.php

   1 <?php
   2 /**
   3  * Implements Special:Version
   4  *
   5  * Copyright © 2005 Ævar Arnfjörð Bjarmason
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 /**
  27  * Give information about the version of MediaWiki, PHP, the DB and extensions
  28  *
  29  * @ingroup SpecialPage
  30  */
  31 class SpecialVersion extends SpecialPage {
  32         protected $firstExtOpened = false;
  33
  34         /**
  35          * Stores the current rev id/SHA hash of MediaWiki core
  36          */
  37         protected $coreId = '';
  38
  39         protected static $extensionTypes = false;
  40
  41         protected static $viewvcUrls = array(
  42                 'svn+ssh://svn.wikimedia.org/svnroot/mediawiki' => 'http://svn.wikimedia.org/viewvc/mediawiki',
  43                 'http://svn.wikimedia.org/svnroot/mediawiki' => 'http://svn.wikimedia.org/viewvc/mediawiki',
  44                 'https://svn.wikimedia.org/svnroot/mediawiki' => 'https://svn.wikimedia.org/viewvc/mediawiki',
  45         );
  46
  47         public function __construct() {
  48                 parent::__construct( 'Version' );
  49         }
  50
  51         /**
  52          * main()
  53          */
  54         public function execute( $par ) {
  55                 global $IP, $wgExtensionCredits;
  56
  57                 $this->setHeaders();
  58                 $this->outputHeader();
  59                 $out = $this->getOutput();
  60                 $out->allowClickjacking();
  61
  62                 // Explode the sub page information into useful bits
  63                 $parts = explode( '/', (string)$par );
  64                 $extNode = null;
  65                 if ( isset( $parts[1] ) ) {
  66                         $extName = str_replace( '_', ' ', $parts[1] );
  67                         // Find it!
  68                         foreach ( $wgExtensionCredits as $group => $extensions ) {
  69                                 foreach ( $extensions as $ext ) {
  70                                         if ( isset( $ext['name'] ) && ( $ext['name'] === $extName ) ) {
  71                                                 $extNode = &$ext;
  72                                                 break 2;
  73                                         }
  74                                 }
  75                         }
  76                         if ( !$extNode ) {
  77                                 $out->setStatusCode( 404 );
  78                         }
  79                 } else {
  80                         $extName = 'MediaWiki';
  81                 }
  82
  83                 // Now figure out what to do
  84                 switch ( strtolower( $parts[0] ) ) {
  85                         case 'credits':
  86                                 $wikiText = '{{int:version-credits-not-found}}';
  87                                 if ( $extName === 'MediaWiki' ) {
  88                                         $wikiText = file_get_contents( $IP . '/CREDITS' );
  89                                 } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
  90                                         $file = $this->getExtAuthorsFileName( dirname( $extNode['path'] ) );
  91                                         if ( $file ) {
  92                                                 $wikiText = file_get_contents( $file );
  93                                                 if ( substr( $file, -4 ) === '.txt' ) {
  94                                                         $wikiText = Html::element( 'pre', array(), $wikiText );
  95                                                 }
  96                                         }
  97                                 }
  98
  99                                 $out->setPageTitle( $this->msg( 'version-credits-title', $extName ) );
 100                                 $out->addWikiText( $wikiText );
 101                                 break;
 102
 103                         case 'license':
 104                                 $wikiText = '{{int:version-license-not-found}}';
 105                                 if ( $extName === 'MediaWiki' ) {
 106                                         $wikiText = file_get_contents( $IP . '/COPYING' );
 107                                 } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
 108                                         $file = $this->getExtLicenseFileName( dirname( $extNode['path'] ) );
 109                                         if ( $file ) {
 110                                                 $wikiText = file_get_contents( $file );
 111                                                 if ( !isset( $extNode['license-name'] ) ) {
 112                                                         // If the developer did not explicitly set license-name they probably
 113                                                         // are unaware that we're now sucking this file in and thus it's probably
 114                                                         // not wikitext friendly.
 115                                                         $wikiText = "<pre>$wikiText</pre>";
 116                                                 }
 117                                         }
 118                                 }
 119
 120                                 $out->setPageTitle( $this->msg( 'version-license-title', $extName ) );
 121                                 $out->addWikiText( $wikiText );
 122                                 break;
 123
 124                         default:
 125                                 $out->addModules( 'mediawiki.special.version' );
 126                                 $out->addWikiText(
 127                                         $this->getMediaWikiCredits() .
 128                                         $this->softwareInformation() .
 129                                         $this->getEntryPointInfo()
 130                                 );
 131                                 $out->addHtml(
 132                                         $this->getSkinCredits() .
 133                                         $this->getExtensionCredits() .
 134                                         $this->getParserTags() .
 135                                         $this->getParserFunctionHooks()
 136                                 );
 137                                 $out->addWikiText( $this->getWgHooks() );
 138                                 $out->addHTML( $this->IPInfo() );
 139
 140                                 break;
 141                 }
 142         }
 143
 144         /**
 145          * Returns wiki text showing the license information.
 146          *
 147          * @return string
 148          */
 149         private static function getMediaWikiCredits() {
 150                 $ret = Xml::element(
 151                         'h2',
 152                         array( 'id' => 'mw-version-license' ),
 153                         wfMessage( 'version-license' )->text()
 154                 );
 155
 156                 // This text is always left-to-right.
 157                 $ret .= '<div class="plainlinks">';
 158                 $ret .= "__NOTOC__
 159                 " . self::getCopyrightAndAuthorList() . "\n
 160                 " . wfMessage( 'version-license-info' )->text();
 161                 $ret .= '</div>';
 162
 163                 return str_replace( "\t\t", '', $ret ) . "\n";
 164         }
 165
 166         /**
 167          * Get the "MediaWiki is copyright 2001-20xx by lots of cool guys" text
 168          *
 169          * @return string
 170          */
 171         public static function getCopyrightAndAuthorList() {
 172                 global $wgLang;
 173
 174                 if ( defined( 'MEDIAWIKI_INSTALL' ) ) {
 175                         $othersLink = '[//www.mediawiki.org/wiki/Special:Version/Credits ' .
 176                                 wfMessage( 'version-poweredby-others' )->text() . ']';
 177                 } else {
 178                         $othersLink = '[[Special:Version/Credits|' .
 179                                 wfMessage( 'version-poweredby-others' )->text() . ']]';
 180                 }
 181
 182                 $translatorsLink = '[//translatewiki.net/wiki/Translating:MediaWiki/Credits ' .
 183                         wfMessage( 'version-poweredby-translators' )->text() . ']';
 184
 185                 $authorList = array(
 186                         'Magnus Manske', 'Brion Vibber', 'Lee Daniel Crocker',
 187                         'Tim Starling', 'Erik Möller', 'Gabriel Wicke', 'Ævar Arnfjörð Bjarmason',
 188                         'Niklas Laxström', 'Domas Mituzas', 'Rob Church', 'Yuri Astrakhan',
 189                         'Aryeh Gregor', 'Aaron Schulz', 'Andrew Garrett', 'Raimond Spekking',
 190                         'Alexandre Emsenhuber', 'Siebrand Mazeland', 'Chad Horohoe',
 191                         'Roan Kattouw', 'Trevor Parscal', 'Bryan Tong Minh', 'Sam Reed',
 192                         'Victor Vasiliev', 'Rotem Liss', 'Platonides', 'Antoine Musso',
 193                         'Timo Tijhof', 'Daniel Kinzler', 'Jeroen De Dauw', $othersLink,
 194                         $translatorsLink
 195                 );
 196
 197                 return wfMessage( 'version-poweredby-credits', MWTimestamp::getLocalInstance()->format( 'Y' ),
 198                         $wgLang->listToText( $authorList ) )->text();
 199         }
 200
 201         /**
 202          * Returns wiki text showing the third party software versions (apache, php, mysql).
 203          *
 204          * @return string
 205          */
 206         static function softwareInformation() {
 207                 $dbr = wfGetDB( DB_SLAVE );
 208
 209                 // Put the software in an array of form 'name' => 'version'. All messages should
 210                 // be loaded here, so feel free to use wfMessage in the 'name'. Raw HTML or
 211                 // wikimarkup can be used.
 212                 $software = array();
 213                 $software['[https://www.mediawiki.org/ MediaWiki]'] = self::getVersionLinked();
 214                 $phpKey = wfIsHHVM() ? '[http://hhvm.com/ HHVM]' :
 215                         '[https://php.net/ PHP]';
 216                 $software[$phpKey] = PHP_VERSION . " (" . PHP_SAPI . ")";
 217                 $software[$dbr->getSoftwareLink()] = $dbr->getServerInfo();
 218
 219                 // Allow a hook to add/remove items.
 220                 wfRunHooks( 'SoftwareInfo', array( &$software ) );
 221
 222                 $out = Xml::element(
 223                                 'h2',
 224                                 array( 'id' => 'mw-version-software' ),
 225                                 wfMessage( 'version-software' )->text()
 226                         ) .
 227                                 Xml::openElement( 'table', array( 'class' => 'wikitable plainlinks', 'id' => 'sv-software' ) ) .
 228                                 "<tr>
 229                                         <th>" . wfMessage( 'version-software-product' )->text() . "</th>
 230                                         <th>" . wfMessage( 'version-software-version' )->text() . "</th>
 231                                 </tr>\n";
 232
 233                 foreach ( $software as $name => $version ) {
 234                         $out .= "<tr>
 235                                         <td>" . $name . "</td>
 236                                         <td dir=\"ltr\">" . $version . "</td>
 237                                 </tr>\n";
 238                 }
 239
 240                 return $out . Xml::closeElement( 'table' );
 241         }
 242
 243         /**
 244          * Return a string of the MediaWiki version with SVN revision if available.
 245          *
 246          * @param string $flags
 247          * @return mixed
 248          */
 249         public static function getVersion( $flags = '' ) {
 250                 global $wgVersion, $IP;
 251                 wfProfileIn( __METHOD__ );
 252
 253                 $gitInfo = self::getGitHeadSha1( $IP );
 254                 $svnInfo = self::getSvnInfo( $IP );
 255                 if ( !$svnInfo && !$gitInfo ) {
 256                         $version = $wgVersion;
 257                 } elseif ( $gitInfo && $flags === 'nodb' ) {
 258                         $shortSha1 = substr( $gitInfo, 0, 7 );
 259                         $version = "$wgVersion ($shortSha1)";
 260                 } elseif ( $gitInfo ) {
 261                         $shortSha1 = substr( $gitInfo, 0, 7 );
 262                         $shortSha1 = wfMessage( 'parentheses' )->params( $shortSha1 )->escaped();
 263                         $version = "$wgVersion $shortSha1";
 264                 } elseif ( $flags === 'nodb' ) {
 265                         $version = "$wgVersion (r{$svnInfo['checkout-rev']})";
 266                 } else {
 267                         $version = $wgVersion . ' ' .
 268                                 wfMessage(
 269                                         'version-svn-revision',
 270                                         isset( $info['directory-rev'] ) ? $info['directory-rev'] : '',
 271                                         $info['checkout-rev']
 272                                 )->text();
 273                 }
 274
 275                 wfProfileOut( __METHOD__ );
 276
 277                 return $version;
 278         }
 279
 280         /**
 281          * Return a wikitext-formatted string of the MediaWiki version with a link to
 282          * the SVN revision or the git SHA1 of head if available.
 283          * Git is prefered over Svn
 284          * The fallback is just $wgVersion
 285          *
 286          * @return mixed
 287          */
 288         public static function getVersionLinked() {
 289                 global $wgVersion;
 290                 wfProfileIn( __METHOD__ );
 291
 292                 $gitVersion = self::getVersionLinkedGit();
 293                 if ( $gitVersion ) {
 294                         $v = $gitVersion;
 295                 } else {
 296                         $svnVersion = self::getVersionLinkedSvn();
 297                         if ( $svnVersion ) {
 298                                 $v = $svnVersion;
 299                         } else {
 300                                 $v = $wgVersion; // fallback
 301                         }
 302                 }
 303
 304                 wfProfileOut( __METHOD__ );
 305
 306                 return $v;
 307         }
 308
 309         /**
 310          * @return string Global wgVersion + a link to subversion revision of svn BASE
 311          */
 312         private static function getVersionLinkedSvn() {
 313                 global $IP;
 314
 315                 $info = self::getSvnInfo( $IP );
 316                 if ( !isset( $info['checkout-rev'] ) ) {
 317                         return false;
 318                 }
 319
 320                 $linkText = wfMessage(
 321                         'version-svn-revision',
 322                         isset( $info['directory-rev'] ) ? $info['directory-rev'] : '',
 323                         $info['checkout-rev']
 324                 )->text();
 325
 326                 if ( isset( $info['viewvc-url'] ) ) {
 327                         $version = "[{$info['viewvc-url']} $linkText]";
 328                 } else {
 329                         $version = $linkText;
 330                 }
 331
 332                 return self::getwgVersionLinked() . " $version";
 333         }
 334
 335         /**
 336          * @return string
 337          */
 338         private static function getwgVersionLinked() {
 339                 global $wgVersion;
 340                 $versionUrl = "";
 341                 if ( wfRunHooks( 'SpecialVersionVersionUrl', array( $wgVersion, &$versionUrl ) ) ) {
 342                         $versionParts = array();
 343                         preg_match( "/^(\d+\.\d+)/", $wgVersion, $versionParts );
 344                         $versionUrl = "https://www.mediawiki.org/wiki/MediaWiki_{$versionParts[1]}";
 345                 }
 346
 347                 return "[$versionUrl $wgVersion]";
 348         }
 349
 350         /**
 351          * @since 1.22 Returns the HEAD date in addition to the sha1 and link
 352          * @return bool|string Global wgVersion + HEAD sha1 stripped to the first 7 chars
 353          *   with link and date, or false on failure
 354          */
 355         private static function getVersionLinkedGit() {
 356                 global $IP, $wgLang;
 357
 358                 $gitInfo = new GitInfo( $IP );
 359                 $headSHA1 = $gitInfo->getHeadSHA1();
 360                 if ( !$headSHA1 ) {
 361                         return false;
 362                 }
 363
 364                 $shortSHA1 = '(' . substr( $headSHA1, 0, 7 ) . ')';
 365
 366                 $gitHeadUrl = $gitInfo->getHeadViewUrl();
 367                 if ( $gitHeadUrl !== false ) {
 368                         $shortSHA1 = "[$gitHeadUrl $shortSHA1]";
 369                 }
 370
 371                 $gitHeadCommitDate = $gitInfo->getHeadCommitDate();
 372                 if ( $gitHeadCommitDate ) {
 373                         $shortSHA1 .= Html::element( 'br' ) . $wgLang->timeanddate( $gitHeadCommitDate, true );
 374                 }
 375
 376                 return self::getwgVersionLinked() . " $shortSHA1";
 377         }
 378
 379         /**
 380          * Returns an array with the base extension types.
 381          * Type is stored as array key, the message as array value.
 382          *
 383          * TODO: ideally this would return all extension types.
 384          *
 385          * @since 1.17
 386          *
 387          * @return array
 388          */
 389         public static function getExtensionTypes() {
 390                 if ( self::$extensionTypes === false ) {
 391                         self::$extensionTypes = array(
 392                                 'specialpage' => wfMessage( 'version-specialpages' )->text(),
 393                                 'parserhook' => wfMessage( 'version-parserhooks' )->text(),
 394                                 'variable' => wfMessage( 'version-variables' )->text(),
 395                                 'media' => wfMessage( 'version-mediahandlers' )->text(),
 396                                 'antispam' => wfMessage( 'version-antispam' )->text(),
 397                                 'skin' => wfMessage( 'version-skins' )->text(),
 398                                 'api' => wfMessage( 'version-api' )->text(),
 399                                 'other' => wfMessage( 'version-other' )->text(),
 400                         );
 401
 402                         wfRunHooks( 'ExtensionTypes', array( &self::$extensionTypes ) );
 403                 }
 404
 405                 return self::$extensionTypes;
 406         }
 407
 408         /**
 409          * Returns the internationalized name for an extension type.
 410          *
 411          * @since 1.17
 412          *
 413          * @param string $type
 414          *
 415          * @return string
 416          */
 417         public static function getExtensionTypeName( $type ) {
 418                 $types = self::getExtensionTypes();
 419
 420                 return isset( $types[$type] ) ? $types[$type] : $types['other'];
 421         }
 422
 423         /**
 424          * Generate wikitext showing the name, URL, author and description of each extension.
 425          *
 426          * @return string Wikitext
 427          */
 428         function getExtensionCredits() {
 429                 global $wgExtensionCredits;
 430
 431                 if ( !count( $wgExtensionCredits ) ) {
 432                         return '';
 433                 }
 434
 435                 $extensionTypes = self::getExtensionTypes();
 436
 437                 $out = Xml::element(
 438                                 'h2',
 439                                 array( 'id' => 'mw-version-ext' ),
 440                                 $this->msg( 'version-extensions' )->text()
 441                         ) .
 442                         Xml::openElement( 'table', array( 'class' => 'wikitable plainlinks', 'id' => 'sv-ext' ) );
 443
 444                 // Make sure the 'other' type is set to an array.
 445                 if ( !array_key_exists( 'other', $wgExtensionCredits ) ) {
 446                         $wgExtensionCredits['other'] = array();
 447                 }
 448
 449                 // Find all extensions that do not have a valid type and give them the type 'other'.
 450                 foreach ( $wgExtensionCredits as $type => $extensions ) {
 451                         if ( !array_key_exists( $type, $extensionTypes ) ) {
 452                                 $wgExtensionCredits['other'] = array_merge( $wgExtensionCredits['other'], $extensions );
 453                         }
 454                 }
 455
 456                 $this->firstExtOpened = false;
 457                 // Loop through the extension categories to display their extensions in the list.
 458                 foreach ( $extensionTypes as $type => $message ) {
 459                         // Skins have a separate section
 460                         if ( $type !== 'other' && $type !== 'skin' ) {
 461                                 $out .= $this->getExtensionCategory( $type, $message );
 462                         }
 463                 }
 464
 465                 // We want the 'other' type to be last in the list.
 466                 $out .= $this->getExtensionCategory( 'other', $extensionTypes['other'] );
 467
 468                 $out .= Xml::closeElement( 'table' );
 469
 470                 return $out;
 471         }
 472
 473         /**
 474          * Generate wikitext showing the name, URL, author and description of each skin.
 475          *
 476          * @return string Wikitext
 477          */
 478         function getSkinCredits() {
 479                 $out = Xml::element(
 480                                 'h2',
 481                                 array( 'id' => 'mw-version-skin' ),
 482                                 $this->msg( 'version-skins' )->text()
 483                         ) .
 484                         Xml::openElement( 'table', array( 'class' => 'wikitable plainlinks', 'id' => 'sv-skin' ) );
 485
 486                 $this->firstExtOpened = false;
 487                 $out .= $this->getExtensionCategory( 'skin', null );
 488
 489                 $out .= Xml::closeElement( 'table' );
 490
 491                 return $out;
 492         }
 493
 494         /**
 495          * Obtains a list of installed parser tags and the associated H2 header
 496          *
 497          * @return string HTML output
 498          */
 499         protected function getParserTags() {
 500                 global $wgParser;
 501
 502                 $tags = $wgParser->getTags();
 503
 504                 if ( count( $tags ) ) {
 505                         $out = Html::rawElement(
 506                                 'h2',
 507                                 array( 'class' => 'mw-headline' ),
 508                                 Linker::makeExternalLink(
 509                                         '//www.mediawiki.org/wiki/Special:MyLanguage/Manual:Tag_extensions',
 510                                         $this->msg( 'version-parser-extensiontags' )->parse(),
 511                                         false /* msg()->parse() already escapes */
 512                                 )
 513                         );
 514
 515                         array_walk( $tags, function ( &$value ) {
 516                                 $value = '&lt;' . htmlspecialchars( $value ) . '&gt;';
 517                         } );
 518                         $out .= $this->listToText( $tags );
 519                 } else {
 520                         $out = '';
 521                 }
 522
 523                 return $out;
 524         }
 525
 526         /**
 527          * Obtains a list of installed parser function hooks and the associated H2 header
 528          *
 529          * @return string HTML output
 530          */
 531         protected function getParserFunctionHooks() {
 532                 global $wgParser;
 533
 534                 $fhooks = $wgParser->getFunctionHooks();
 535                 if ( count( $fhooks ) ) {
 536                         $out = Html::rawElement( 'h2', array( 'class' => 'mw-headline' ), Linker::makeExternalLink(
 537                                 '//www.mediawiki.org/wiki/Special:MyLanguage/Manual:Parser_functions',
 538                                 $this->msg( 'version-parser-function-hooks' )->parse(),
 539                                 false /* msg()->parse() already escapes */
 540                         ) );
 541
 542                         $out .= $this->listToText( $fhooks );
 543                 } else {
 544                         $out = '';
 545                 }
 546
 547                 return $out;
 548         }
 549
 550         /**
 551          * Creates and returns the HTML for a single extension category.
 552          *
 553          * @since 1.17
 554          *
 555          * @param string $type
 556          * @param string $message
 557          *
 558          * @return string
 559          */
 560         protected function getExtensionCategory( $type, $message ) {
 561                 global $wgExtensionCredits;
 562
 563                 $out = '';
 564
 565                 if ( array_key_exists( $type, $wgExtensionCredits ) && count( $wgExtensionCredits[$type] ) > 0 ) {
 566                         $out .= $this->openExtType( $message, 'credits-' . $type );
 567
 568                         usort( $wgExtensionCredits[$type], array( $this, 'compare' ) );
 569
 570                         foreach ( $wgExtensionCredits[$type] as $extension ) {
 571                                 $out .= $this->getCreditsForExtension( $extension );
 572                         }
 573                 }
 574
 575                 return $out;
 576         }
 577
 578         /**
 579          * Callback to sort extensions by type.
 580          * @param array $a
 581          * @param array $b
 582          * @return int
 583          */
 584         function compare( $a, $b ) {
 585                 if ( $a['name'] === $b['name'] ) {
 586                         return 0;
 587                 } else {
 588                         return $this->getLanguage()->lc( $a['name'] ) > $this->getLanguage()->lc( $b['name'] )
 589                                 ? 1
 590                                 : -1;
 591                 }
 592         }
 593
 594         /**
 595          * Creates and formats a version line for a single extension.
 596          *
 597          * Information for five columns will be created. Parameters required in the
 598          * $extension array for part rendering are indicated in ()
 599          *  - The name of (name), and URL link to (url), the extension
 600          *  - Official version number (version) and if available version control system
 601          *    revision (path), link, and date
 602          *  - If available the short name of the license (license-name) and a linke
 603          *    to ((LICENSE)|(COPYING))(\.txt)? if it exists.
 604          *  - Description of extension (descriptionmsg or description)
 605          *  - List of authors (author) and link to a ((AUTHORS)|(CREDITS))(\.txt)? file if it exists
 606          *
 607          * @param array $extension
 608          *
 609          * @return string Raw HTML
 610          */
 611         function getCreditsForExtension( array $extension ) {
 612                 $out = $this->getOutput();
 613
 614                 // We must obtain the information for all the bits and pieces!
 615                 // ... such as extension names and links
 616                 if ( isset( $extension['namemsg'] ) ) {
 617                         // Localized name of extension
 618                         $extensionName = $this->msg( $extension['namemsg'] )->text();
 619                 } elseif ( isset( $extension['name'] ) ) {
 620                         // Non localized version
 621                         $extensionName = $extension['name'];
 622                 } else {
 623                         $extensionName = $this->msg( 'version-no-ext-name' )->text();
 624                 }
 625
 626                 if ( isset( $extension['url'] ) ) {
 627                         $extensionNameLink = Linker::makeExternalLink(
 628                                 $extension['url'],
 629                                 $extensionName,
 630                                 true,
 631                                 '',
 632                                 array( 'class' => 'mw-version-ext-name' )
 633                         );
 634                 } else {
 635                         $extensionNameLink = $extensionName;
 636                 }
 637
 638                 // ... and the version information
 639                 // If the extension path is set we will check that directory for GIT and SVN
 640                 // metadata in an attempt to extract date and vcs commit metadata.
 641                 $canonicalVersion = '&ndash;';
 642                 $extensionPath = null;
 643                 $vcsVersion = null;
 644                 $vcsLink = null;
 645                 $vcsDate = null;
 646
 647                 if ( isset( $extension['version'] ) ) {
 648                         $canonicalVersion = $out->parseInline( $extension['version'] );
 649                 }
 650
 651                 if ( isset( $extension['path'] ) ) {
 652                         global $IP;
 653                         $extensionPath = dirname( $extension['path'] );
 654                         if ( $this->coreId == '' ) {
 655                                 wfDebug( 'Looking up core head id' );
 656                                 $coreHeadSHA1 = self::getGitHeadSha1( $IP );
 657                                 if ( $coreHeadSHA1 ) {
 658                                         $this->coreId = $coreHeadSHA1;
 659                                 } else {
 660                                         $svnInfo = self::getSvnInfo( $IP );
 661                                         if ( $svnInfo !== false ) {
 662                                                 $this->coreId = $svnInfo['checkout-rev'];
 663                                         }
 664                                 }
 665                         }
 666                         $cache = wfGetCache( CACHE_ANYTHING );
 667                         $memcKey = wfMemcKey( 'specialversion-ext-version-text', $extension['path'], $this->coreId );
 668                         list( $vcsVersion, $vcsLink, $vcsDate ) = $cache->get( $memcKey );
 669
 670                         if ( !$vcsVersion ) {
 671                                 wfDebug( "Getting VCS info for extension $extensionName" );
 672                                 $gitInfo = new GitInfo( $extensionPath );
 673                                 $vcsVersion = $gitInfo->getHeadSHA1();
 674                                 if ( $vcsVersion !== false ) {
 675                                         $vcsVersion = substr( $vcsVersion, 0, 7 );
 676                                         $vcsLink = $gitInfo->getHeadViewUrl();
 677                                         $vcsDate = $gitInfo->getHeadCommitDate();
 678                                 } else {
 679                                         $svnInfo = self::getSvnInfo( $extensionPath );
 680                                         if ( $svnInfo !== false ) {
 681                                                 $vcsVersion = $this->msg( 'version-svn-revision', $svnInfo['checkout-rev'] )->text();
 682                                                 $vcsLink = isset( $svnInfo['viewvc-url'] ) ? $svnInfo['viewvc-url'] : '';
 683                                         }
 684                                 }
 685                                 $cache->set( $memcKey, array( $vcsVersion, $vcsLink, $vcsDate ), 60 * 60 * 24 );
 686                         } else {
 687                                 wfDebug( "Pulled VCS info for extension $extensionName from cache" );
 688                         }
 689                 }
 690
 691                 $versionString = Html::rawElement(
 692                         'span',
 693                         array( 'class' => 'mw-version-ext-version' ),
 694                         $canonicalVersion
 695                 );
 696
 697                 if ( $vcsVersion ) {
 698                         if ( $vcsLink ) {
 699                                 $vcsVerString = Linker::makeExternalLink(
 700                                         $vcsLink,
 701                                         $this->msg( 'version-version', $vcsVersion ),
 702                                         true,
 703                                         '',
 704                                         array( 'class' => 'mw-version-ext-vcs-version' )
 705                                 );
 706                         } else {
 707                                 $vcsVerString = Html::element( 'span',
 708                                         array( 'class' => 'mw-version-ext-vcs-version' ),
 709                                         "({$vcsVersion})"
 710                                 );
 711                         }
 712                         $versionString .= " {$vcsVerString}";
 713
 714                         if ( $vcsDate ) {
 715                                 $vcsTimeString = Html::element( 'span',
 716                                         array( 'class' => 'mw-version-ext-vcs-timestamp' ),
 717                                         $this->getLanguage()->timeanddate( $vcsDate )
 718                                 );
 719                                 $versionString .= " {$vcsTimeString}";
 720                         }
 721                         $versionString = Html::rawElement( 'span',
 722                                 array( 'class' => 'mw-version-ext-meta-version' ),
 723                                 $versionString
 724                         );
 725                 }
 726
 727                 // ... and license information; if a license file exists we
 728                 // will link to it
 729                 $licenseLink = '';
 730                 if ( isset( $extension['license-name'] ) ) {
 731                         $licenseLink = Linker::link(
 732                                 $this->getPageTitle( 'License/' . $extensionName ),
 733                                 $out->parseInline( $extension['license-name'] ),
 734                                 array( 'class' => 'mw-version-ext-license' )
 735                         );
 736                 } elseif ( $this->getExtLicenseFileName( $extensionPath ) ) {
 737                         $licenseLink = Linker::link(
 738                                 $this->getPageTitle( 'License/' . $extensionName ),
 739                                 $this->msg( 'version-ext-license' ),
 740                                 array( 'class' => 'mw-version-ext-license' )
 741                         );
 742                 }
 743
 744                 // ... and generate the description; which can be a parameterized l10n message
 745                 // in the form array( <msgname>, <parameter>, <parameter>... ) or just a straight
 746                 // up string
 747                 if ( isset( $extension['descriptionmsg'] ) ) {
 748                         // Localized description of extension
 749                         $descriptionMsg = $extension['descriptionmsg'];
 750
 751                         if ( is_array( $descriptionMsg ) ) {
 752                                 $descriptionMsgKey = $descriptionMsg[0]; // Get the message key
 753                                 array_shift( $descriptionMsg ); // Shift out the message key to get the parameters only
 754                                 array_map( "htmlspecialchars", $descriptionMsg ); // For sanity
 755                                 $description = $this->msg( $descriptionMsgKey, $descriptionMsg )->text();
 756                         } else {
 757                                 $description = $this->msg( $descriptionMsg )->text();
 758                         }
 759                 } elseif ( isset( $extension['description'] ) ) {
 760                         // Non localized version
 761                         $description = $extension['description'];
 762                 } else {
 763                         $description = '';
 764                 }
 765                 $description = $out->parseInline( $description );
 766
 767                 // ... now get the authors for this extension
 768                 $authors = isset( $extension['author'] ) ? $extension['author'] : array();
 769                 $authors = $this->listAuthors( $authors, $extensionName, $extensionPath );
 770
 771                 // Finally! Create the table
 772                 $html = Html::openElement( 'tr', array(
 773                                 'class' => 'mw-version-ext',
 774                                 'id' => "mw-version-ext-{$extensionName}"
 775                         )
 776                 );
 777
 778                 $html .= Html::rawElement( 'td', array(), $extensionNameLink );
 779                 $html .= Html::rawElement( 'td', array(), $versionString );
 780                 $html .= Html::rawElement( 'td', array(), $licenseLink );
 781                 $html .= Html::rawElement( 'td', array( 'class' => 'mw-version-ext-description' ), $description );
 782                 $html .= Html::rawElement( 'td', array( 'class' => 'mw-version-ext-authors' ), $authors );
 783
 784                 $html .= Html::closeElement( 'td' );
 785
 786                 return $html;
 787         }
 788
 789         /**
 790          * Generate wikitext showing hooks in $wgHooks.
 791          *
 792          * @return string Wikitext
 793          */
 794         private function getWgHooks() {
 795                 global $wgSpecialVersionShowHooks, $wgHooks;
 796
 797                 if ( $wgSpecialVersionShowHooks && count( $wgHooks ) ) {
 798                         $myWgHooks = $wgHooks;
 799                         ksort( $myWgHooks );
 800
 801                         $ret = array();
 802                         $ret[] = '== {{int:version-hooks}} ==';
 803                         $ret[] = Html::openElement( 'table', array( 'class' => 'wikitable', 'id' => 'sv-hooks' ) );
 804                         $ret[] = Html::openElement( 'tr' );
 805                         $ret[] = Html::element( 'th', array(), $this->msg( 'version-hook-name' )->text() );
 806                         $ret[] = Html::element( 'th', array(), $this->msg( 'version-hook-subscribedby' )->text() );
 807                         $ret[] = Html::closeElement( 'tr' );
 808
 809                         foreach ( $myWgHooks as $hook => $hooks ) {
 810                                 $ret[] = Html::openElement( 'tr' );
 811                                 $ret[] = Html::element( 'td', array(), $hook );
 812                                 $ret[] = Html::element( 'td', array(), $this->listToText( $hooks ) );
 813                                 $ret[] = Html::closeElement( 'tr' );
 814                         }
 815
 816                         $ret[] = Html::closeElement( 'table' );
 817
 818                         return implode( "\n", $ret );
 819                 } else {
 820                         return '';
 821                 }
 822         }
 823
 824         private function openExtType( $text = null, $name = null ) {
 825                 $out = '';
 826
 827                 $opt = array( 'colspan' => 5 );
 828                 if ( $this->firstExtOpened ) {
 829                         // Insert a spacing line
 830                         $out .= Html::rawElement( 'tr', array( 'class' => 'sv-space' ),
 831                                 Html::element( 'td', $opt )
 832                         );
 833                 }
 834                 $this->firstExtOpened = true;
 835
 836                 if ( $name ) {
 837                         $opt['id'] = "sv-$name";
 838                 }
 839
 840                 if ( $text !== null ) {
 841                         $out .= Html::rawElement( 'tr', array(),
 842                                 Html::element( 'th', $opt, $text )
 843                         );
 844                 }
 845
 846                 $firstHeadingMsg = ( $name === 'credits-skin' )
 847                         ? 'version-skin-colheader-name'
 848                         : 'version-ext-colheader-name';
 849                 $out .= Html::openElement( 'tr' );
 850                 $out .= Html::element( 'th', array( 'class' => 'mw-version-ext-col-label' ),
 851                         $this->msg( $firstHeadingMsg )->text() );
 852                 $out .= Html::element( 'th', array( 'class' => 'mw-version-ext-col-label' ),
 853                         $this->msg( 'version-ext-colheader-version' )->text() );
 854                 $out .= Html::element( 'th', array( 'class' => 'mw-version-ext-col-label' ),
 855                         $this->msg( 'version-ext-colheader-license' )->text() );
 856                 $out .= Html::element( 'th', array( 'class' => 'mw-version-ext-col-label' ),
 857                         $this->msg( 'version-ext-colheader-description' )->text() );
 858                 $out .= Html::element( 'th', array( 'class' => 'mw-version-ext-col-label' ),
 859                         $this->msg( 'version-ext-colheader-credits' )->text() );
 860                 $out .= Html::closeElement( 'tr' );
 861
 862                 return $out;
 863         }
 864
 865         /**
 866          * Get information about client's IP address.
 867          *
 868          * @return string HTML fragment
 869          */
 870         private function IPInfo() {
 871                 $ip = str_replace( '--', ' - ', htmlspecialchars( $this->getRequest()->getIP() ) );
 872
 873                 return "<!-- visited from $ip -->\n<span style='display:none'>visited from $ip</span>";
 874         }
 875
 876         /**
 877          * Return a formatted unsorted list of authors
 878          *
 879          * 'And Others'
 880          *   If an item in the $authors array is '...' it is assumed to indicate an
 881          *   'and others' string which will then be linked to an ((AUTHORS)|(CREDITS))(\.txt)?
 882          *   file if it exists in $dir.
 883          *
 884          *   Similarly an entry ending with ' ...]' is assumed to be a link to an
 885          *   'and others' page.
 886          *
 887          *   If no '...' string variant is found, but an authors file is found an
 888          *   'and others' will be added to the end of the credits.
 889          *
 890          * @param string|array $authors
 891          * @param string $extName Name of the extension for link creation
 892          * @param string $extDir Path to the extension root directory
 893          *
 894          * @return string HTML fragment
 895          */
 896         function listAuthors( $authors, $extName, $extDir ) {
 897                 $hasOthers = false;
 898
 899                 $list = array();
 900                 foreach ( (array)$authors as $item ) {
 901                         if ( $item == '...' ) {
 902                                 $hasOthers = true;
 903
 904                                 if ( $this->getExtAuthorsFileName( $extDir ) ) {
 905                                         $text = Linker::link(
 906                                                 $this->getPageTitle( "Credits/$extName" ),
 907                                                 $this->msg( 'version-poweredby-others' )->text()
 908                                         );
 909                                 } else {
 910                                         $text = $this->msg( 'version-poweredby-others' )->text();
 911                                 }
 912                                 $list[] = $text;
 913                         } elseif ( substr( $item, -5 ) == ' ...]' ) {
 914                                 $hasOthers = true;
 915                                 $list[] = $this->getOutput()->parseInline(
 916                                         substr( $item, 0, -4 ) . $this->msg( 'version-poweredby-others' )->text() . "]"
 917                                 );
 918                         } else {
 919                                 $list[] = $this->getOutput()->parseInline( $item );
 920                         }
 921                 }
 922
 923                 if ( !$hasOthers && $this->getExtAuthorsFileName( $extDir ) ) {
 924                         $list[] = $text = Linker::link(
 925                                 $this->getPageTitle( "Credits/$extName" ),
 926                                 $this->msg( 'version-poweredby-others' )->text()
 927                         );
 928                 }
 929
 930                 return $this->listToText( $list, false );
 931         }
 932
 933         /**
 934          * Obtains the full path of an extensions authors or credits file if
 935          * one exists.
 936          *
 937          * @param string $extDir Path to the extensions root directory
 938          *
 939          * @since 1.23
 940          *
 941          * @return bool|string False if no such file exists, otherwise returns
 942          * a path to it.
 943          */
 944         public static function getExtAuthorsFileName( $extDir ) {
 945                 if ( !$extDir ) {
 946                         return false;
 947                 }
 948
 949                 foreach ( scandir( $extDir ) as $file ) {
 950                         $fullPath = $extDir . DIRECTORY_SEPARATOR . $file;
 951                         if ( preg_match( '/^((AUTHORS)|(CREDITS))(\.txt)?$/', $file ) &&
 952                                 is_readable( $fullPath ) &&
 953                                 is_file( $fullPath )
 954                         ) {
 955                                 return $fullPath;
 956                         }
 957                 }
 958
 959                 return false;
 960         }
 961
 962         /**
 963          * Obtains the full path of an extensions copying or license file if
 964          * one exists.
 965          *
 966          * @param string $extDir Path to the extensions root directory
 967          *
 968          * @since 1.23
 969          *
 970          * @return bool|string False if no such file exists, otherwise returns
 971          * a path to it.
 972          */
 973         public static function getExtLicenseFileName( $extDir ) {
 974                 if ( !$extDir ) {
 975                         return false;
 976                 }
 977
 978                 foreach ( scandir( $extDir ) as $file ) {
 979                         $fullPath = $extDir . DIRECTORY_SEPARATOR . $file;
 980                         if ( preg_match( '/^((COPYING)|(LICENSE))(\.txt)?$/', $file ) &&
 981                                 is_readable( $fullPath ) &&
 982                                 is_file( $fullPath )
 983                         ) {
 984                                 return $fullPath;
 985                         }
 986                 }
 987
 988                 return false;
 989         }
 990
 991         /**
 992          * Convert an array of items into a list for display.
 993          *
 994          * @param array $list List of elements to display
 995          * @param bool $sort Whether to sort the items in $list
 996          *
 997          * @return string
 998          */
 999         function listToText( $list, $sort = true ) {
1000                 if ( !count( $list ) ) {
1001                         return '';
1002                 }
1003                 if ( $sort ) {
1004                         sort( $list );
1005                 }
1006
1007                 return $this->getLanguage()
1008                         ->listToText( array_map( array( __CLASS__, 'arrayToString' ), $list ) );
1009         }
1010
1011         /**
1012          * Convert an array or object to a string for display.
1013          *
1014          * @param mixed $list Will convert an array to string if given and return
1015          *   the paramater unaltered otherwise
1016          *
1017          * @return mixed
1018          */
1019         public static function arrayToString( $list ) {
1020                 if ( is_array( $list ) && count( $list ) == 1 ) {
1021                         $list = $list[0];
1022                 }
1023                 if ( is_object( $list ) ) {
1024                         $class = wfMessage( 'parentheses' )->params( get_class( $list ) )->escaped();
1025
1026                         return $class;
1027                 } elseif ( !is_array( $list ) ) {
1028                         return $list;
1029                 } else {
1030                         if ( is_object( $list[0] ) ) {
1031                                 $class = get_class( $list[0] );
1032                         } else {
1033                                 $class = $list[0];
1034                         }
1035
1036                         return wfMessage( 'parentheses' )->params( "$class, {$list[1]}" )->escaped();
1037                 }
1038         }
1039
1040         /**
1041          * Get an associative array of information about a given path, from its .svn
1042          * subdirectory. Returns false on error, such as if the directory was not
1043          * checked out with subversion.
1044          *
1045          * Returned keys are:
1046          *    Required:
1047          *        checkout-rev          The revision which was checked out
1048          *    Optional:
1049          *        directory-rev         The revision when the directory was last modified
1050          *        url                   The subversion URL of the directory
1051          *        repo-url              The base URL of the repository
1052          *        viewvc-url            A ViewVC URL pointing to the checked-out revision
1053          * @param string $dir
1054          * @return array|bool
1055          */
1056         public static function getSvnInfo( $dir ) {
1057                 // http://svnbook.red-bean.com/nightly/en/svn.developer.insidewc.html
1058                 $entries = $dir . '/.svn/entries';
1059
1060                 if ( !file_exists( $entries ) ) {
1061                         return false;
1062                 }
1063
1064                 $lines = file( $entries );
1065                 if ( !count( $lines ) ) {
1066                         return false;
1067                 }
1068
1069                 // check if file is xml (subversion release <= 1.3) or not (subversion release = 1.4)
1070                 if ( preg_match( '/^<\?xml/', $lines[0] ) ) {
1071                         // subversion is release <= 1.3
1072                         if ( !function_exists( 'simplexml_load_file' ) ) {
1073                                 // We could fall back to expat... YUCK
1074                                 return false;
1075                         }
1076
1077                         // SimpleXml whines about the xmlns...
1078                         wfSuppressWarnings();
1079                         $xml = simplexml_load_file( $entries );
1080                         wfRestoreWarnings();
1081
1082                         if ( $xml ) {
1083                                 foreach ( $xml->entry as $entry ) {
1084                                         if ( $xml->entry[0]['name'] == '' ) {
1085                                                 // The directory entry should always have a revision marker.
1086                                                 if ( $entry['revision'] ) {
1087                                                         return array( 'checkout-rev' => intval( $entry['revision'] ) );
1088                                                 }
1089                                         }
1090                                 }
1091                         }
1092
1093                         return false;
1094                 }
1095
1096                 // Subversion is release 1.4 or above.
1097                 if ( count( $lines ) < 11 ) {
1098                         return false;
1099                 }
1100
1101                 $info = array(
1102                         'checkout-rev' => intval( trim( $lines[3] ) ),
1103                         'url' => trim( $lines[4] ),
1104                         'repo-url' => trim( $lines[5] ),
1105                         'directory-rev' => intval( trim( $lines[10] ) )
1106                 );
1107
1108                 if ( isset( self::$viewvcUrls[$info['repo-url']] ) ) {
1109                         $viewvc = str_replace(
1110                                 $info['repo-url'],
1111                                 self::$viewvcUrls[$info['repo-url']],
1112                                 $info['url']
1113                         );
1114
1115                         $viewvc .= '/?pathrev=';
1116                         $viewvc .= urlencode( $info['checkout-rev'] );
1117                         $info['viewvc-url'] = $viewvc;
1118                 }
1119
1120                 return $info;
1121         }
1122
1123         /**
1124          * Retrieve the revision number of a Subversion working directory.
1125          *
1126          * @param string $dir Directory of the svn checkout
1127          *
1128          * @return int Revision number
1129          */
1130         public static function getSvnRevision( $dir ) {
1131                 $info = self::getSvnInfo( $dir );
1132
1133                 if ( $info === false ) {
1134                         return false;
1135                 } elseif ( isset( $info['checkout-rev'] ) ) {
1136                         return $info['checkout-rev'];
1137                 } else {
1138                         return false;
1139                 }
1140         }
1141
1142         /**
1143          * @param string $dir Directory of the git checkout
1144          * @return bool|string Sha1 of commit HEAD points to
1145          */
1146         public static function getGitHeadSha1( $dir ) {
1147                 $repo = new GitInfo( $dir );
1148
1149                 return $repo->getHeadSHA1();
1150         }
1151
1152         /**
1153          * @param string $dir Directory of the git checkout
1154          * @return bool|string Branch currently checked out
1155          */
1156         public static function getGitCurrentBranch( $dir ) {
1157                 $repo = new GitInfo( $dir );
1158                 return $repo->getCurrentBranch();
1159         }
1160
1161         /**
1162          * Get the list of entry points and their URLs
1163          * @return string Wikitext
1164          */
1165         public function getEntryPointInfo() {
1166                 global $wgArticlePath, $wgScriptPath;
1167                 $scriptPath = $wgScriptPath ? $wgScriptPath : "/";
1168                 $entryPoints = array(
1169                         'version-entrypoints-articlepath' => $wgArticlePath,
1170                         'version-entrypoints-scriptpath' => $scriptPath,
1171                         'version-entrypoints-index-php' => wfScript( 'index' ),
1172                         'version-entrypoints-api-php' => wfScript( 'api' ),
1173                         'version-entrypoints-load-php' => wfScript( 'load' ),
1174                 );
1175
1176                 $language = $this->getLanguage();
1177                 $thAttribures = array(
1178                         'dir' => $language->getDir(),
1179                         'lang' => $language->getCode()
1180                 );
1181                 $out = Html::element(
1182                                 'h2',
1183                                 array( 'id' => 'mw-version-entrypoints' ),
1184                                 $this->msg( 'version-entrypoints' )->text()
1185                         ) .
1186                         Html::openElement( 'table',
1187                                 array(
1188                                         'class' => 'wikitable plainlinks',
1189                                         'id' => 'mw-version-entrypoints-table',
1190                                         'dir' => 'ltr',
1191                                         'lang' => 'en'
1192                                 )
1193                         ) .
1194                         Html::openElement( 'tr' ) .
1195                         Html::element(
1196                                 'th',
1197                                 $thAttribures,
1198                                 $this->msg( 'version-entrypoints-header-entrypoint' )->text()
1199                         ) .
1200                         Html::element(
1201                                 'th',
1202                                 $thAttribures,
1203                                 $this->msg( 'version-entrypoints-header-url' )->text()
1204                         ) .
1205                         Html::closeElement( 'tr' );
1206
1207                 foreach ( $entryPoints as $message => $value ) {
1208                         $url = wfExpandUrl( $value, PROTO_RELATIVE );
1209                         $out .= Html::openElement( 'tr' ) .
1210                                 // ->text() looks like it should be ->parse(), but this function
1211                                 // returns wikitext, not HTML, boo
1212                                 Html::rawElement( 'td', array(), $this->msg( $message )->text() ) .
1213                                 Html::rawElement( 'td', array(), Html::rawElement( 'code', array(), "[$url $value]" ) ) .
1214                                 Html::closeElement( 'tr' );
1215                 }
1216
1217                 $out .= Html::closeElement( 'table' );
1218
1219                 return $out;
1220         }
1221
1222         protected function getGroupName() {
1223                 return 'wiki';
1224         }
1225 }