includes/LogEventsList.php

   1 <?php
   2 /**
   3  * Contain classes to list log entries
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 class LogEventsList {
  27         const NO_ACTION_LINK = 1;
  28         const NO_EXTRA_USER_LINKS = 2;
  29
  30         /**
  31          * @var Skin
  32          */
  33         private $skin;
  34
  35         /**
  36          * @var OutputPage
  37          */
  38         private $out;
  39         public $flags;
  40
  41         /**
  42          * @var Array
  43          */
  44         protected $message;
  45
  46         /**
  47          * @var Array
  48          */
  49         protected $mDefaultQuery;
  50
  51         public function __construct( $skin, $out, $flags = 0 ) {
  52                 $this->skin = $skin;
  53                 $this->out = $out;
  54                 $this->flags = $flags;
  55                 $this->preCacheMessages();
  56         }
  57
  58         /**
  59          * As we use the same small set of messages in various methods and that
  60          * they are called often, we call them once and save them in $this->message
  61          */
  62         private function preCacheMessages() {
  63                 // Precache various messages
  64                 if( !isset( $this->message ) ) {
  65                         $messages = array( 'revertmerge', 'protect_change', 'unblocklink', 'change-blocklink',
  66                                 'revertmove', 'undeletelink', 'undeleteviewlink', 'revdel-restore', 'hist', 'diff',
  67                                 'pipe-separator', 'revdel-restore-deleted', 'revdel-restore-visible' );
  68                         foreach( $messages as $msg ) {
  69                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  70                         }
  71                 }
  72         }
  73
  74         /**
  75          * Set page title and show header for this log type
  76          * @param $type Array
  77          * @deprecated in 1.19
  78          */
  79         public function showHeader( $type ) {
  80                 wfDeprecated( __METHOD__ );
  81                 // If only one log type is used, then show a special message...
  82                 $headerType = (count($type) == 1) ? $type[0] : '';
  83                 if( LogPage::isLogType( $headerType ) ) {
  84                         $page = new LogPage( $headerType );
  85                         $this->out->setPageTitle( $page->getName()->text() );
  86                         $this->out->addHTML( $page->getDescription()->parseAsBlock() );
  87                 } else {
  88                         $this->out->addHTML( wfMsgExt('alllogstext',array('parseinline')) );
  89                 }
  90         }
  91
  92         /**
  93          * Show options for the log list
  94          *
  95          * @param $types string or Array
  96          * @param $user String
  97          * @param $page String
  98          * @param $pattern String
  99          * @param $year Integer: year
 100          * @param $month Integer: month
 101          * @param $filter: array
 102          * @param $tagFilter: array?
 103          */
 104         public function showOptions( $types=array(), $user='', $page='', $pattern='', $year='',
 105                 $month = '', $filter = null, $tagFilter='' ) {
 106                 global $wgScript, $wgMiserMode;
 107
 108                 $action = $wgScript;
 109                 $title = SpecialPage::getTitleFor( 'Log' );
 110                 $special = $title->getPrefixedDBkey();
 111
 112                 // For B/C, we take strings, but make sure they are converted...
 113                 $types = ($types === '') ? array() : (array)$types;
 114
 115                 $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
 116
 117                 $html = Html::hidden( 'title', $special );
 118
 119                 // Basic selectors
 120                 $html .= $this->getTypeMenu( $types ) . "\n";
 121                 $html .= $this->getUserInput( $user ) . "\n";
 122                 $html .= $this->getTitleInput( $page ) . "\n";
 123                 $html .= $this->getExtraInputs( $types ) . "\n";
 124
 125                 // Title pattern, if allowed
 126                 if (!$wgMiserMode) {
 127                         $html .= $this->getTitlePattern( $pattern ) . "\n";
 128                 }
 129
 130                 // date menu
 131                 $html .= Xml::tags( 'p', null, Xml::dateMenu( $year, $month ) );
 132
 133                 // Tag filter
 134                 if ($tagSelector) {
 135                         $html .= Xml::tags( 'p', null, implode( '&#160;', $tagSelector ) );
 136                 }
 137
 138                 // Filter links
 139                 if ($filter) {
 140                         $html .= Xml::tags( 'p', null, $this->getFilterLinks( $filter ) );
 141                 }
 142
 143                 // Submit button
 144                 $html .= Xml::submitButton( wfMsg( 'allpagessubmit' ) );
 145
 146                 // Fieldset
 147                 $html = Xml::fieldset( wfMsg( 'log' ), $html );
 148
 149                 // Form wrapping
 150                 $html = Xml::tags( 'form', array( 'action' => $action, 'method' => 'get' ), $html );
 151
 152                 $this->out->addHTML( $html );
 153         }
 154
 155         /**
 156          * @param $filter Array
 157          * @return String: Formatted HTML
 158          */
 159         private function getFilterLinks( $filter ) {
 160                 global $wgLang;
 161                 // show/hide links
 162                 $messages = array( wfMsgHtml( 'show' ), wfMsgHtml( 'hide' ) );
 163                 // Option value -> message mapping
 164                 $links = array();
 165                 $hiddens = ''; // keep track for "go" button
 166                 foreach( $filter as $type => $val ) {
 167                         // Should the below assignment be outside the foreach?
 168                         // Then it would have to be copied. Not certain what is more expensive.
 169                         $query = $this->getDefaultQuery();
 170                         $queryKey = "hide_{$type}_log";
 171
 172                         $hideVal = 1 - intval($val);
 173                         $query[$queryKey] = $hideVal;
 174
 175                         $link = Linker::link(
 176                                 $this->getDisplayTitle(),
 177                                 $messages[$hideVal],
 178                                 array(),
 179                                 $query,
 180                                 array( 'known', 'noclasses' )
 181                         );
 182
 183                         $links[$type] = wfMsgHtml( "log-show-hide-{$type}", $link );
 184                         $hiddens .= Html::hidden( "hide_{$type}_log", $val ) . "\n";
 185                 }
 186                 // Build links
 187                 return '<small>'.$wgLang->pipeList( $links ) . '</small>' . $hiddens;
 188         }
 189
 190         private function getDefaultQuery() {
 191                 global $wgRequest;
 192
 193                 if ( !isset( $this->mDefaultQuery ) ) {
 194                         $this->mDefaultQuery = $wgRequest->getQueryValues();
 195                         unset( $this->mDefaultQuery['title'] );
 196                         unset( $this->mDefaultQuery['dir'] );
 197                         unset( $this->mDefaultQuery['offset'] );
 198                         unset( $this->mDefaultQuery['limit'] );
 199                         unset( $this->mDefaultQuery['order'] );
 200                         unset( $this->mDefaultQuery['month'] );
 201                         unset( $this->mDefaultQuery['year'] );
 202                 }
 203                 return $this->mDefaultQuery;
 204         }
 205
 206         /**
 207          * Get the Title object of the page the links should point to.
 208          * This is NOT the Title of the page the entries should be restricted to.
 209          *
 210          * @return Title object
 211          */
 212         public function getDisplayTitle() {
 213                 return $this->out->getTitle();
 214         }
 215
 216         public function getContext() {
 217                 return $this->out->getContext();
 218         }
 219
 220         /**
 221          * @param $queryTypes Array
 222          * @return String: Formatted HTML
 223          */
 224         private function getTypeMenu( $queryTypes ) {
 225                 $queryType = count($queryTypes) == 1 ? $queryTypes[0] : '';
 226                 $selector = $this->getTypeSelector();
 227                 $selector->setDefault( $queryType );
 228                 return $selector->getHtml();
 229         }
 230
 231         /**
 232          * Returns log page selector.
 233          * @param $default string The default selection
 234          * @return XmlSelect
 235          * @since 1.19
 236          */
 237         public function getTypeSelector() {
 238                 global $wgUser;
 239
 240                 $typesByName = array(); // Temporary array
 241                 // First pass to load the log names
 242                 foreach(  LogPage::validTypes() as $type ) {
 243                         $page = new LogPage( $type );
 244                         $restriction = $page->getRestriction();
 245                         if ( $wgUser->isAllowed( $restriction ) ) {
 246                                 $typesByName[$type] = $page->getName()->text();
 247                         }
 248                 }
 249
 250                 // Second pass to sort by name
 251                 asort($typesByName);
 252
 253                 // Always put "All public logs" on top
 254                 $public = $typesByName[''];
 255                 unset( $typesByName[''] );
 256                 $typesByName = array( '' => $public ) + $typesByName;
 257
 258                 $select = new XmlSelect( 'type' );
 259                 foreach( $typesByName as $type => $name ) {
 260                         $select->addOption( $name, $type );
 261                 }
 262
 263                 return $select;
 264         }
 265
 266         /**
 267          * @param $user String
 268          * @return String: Formatted HTML
 269          */
 270         private function getUserInput( $user ) {
 271                 return '<span style="white-space: nowrap">' .
 272                         Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'mw-log-user', 15, $user ) .
 273                         '</span>';
 274         }
 275
 276         /**
 277          * @param $title String
 278          * @return String: Formatted HTML
 279          */
 280         private function getTitleInput( $title ) {
 281                 return '<span style="white-space: nowrap">' .
 282                         Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'mw-log-page', 20, $title ) .
 283                         '</span>';
 284         }
 285
 286         /**
 287          * @param $pattern
 288          * @return string Checkbox
 289          */
 290         private function getTitlePattern( $pattern ) {
 291                 return '<span style="white-space: nowrap">' .
 292                         Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
 293                         '</span>';
 294         }
 295
 296         /**
 297          * @param $types
 298          * @return string
 299          */
 300         private function getExtraInputs( $types ) {
 301                 global $wgRequest;
 302                 $offender = $wgRequest->getVal('offender');
 303                 $user = User::newFromName( $offender, false );
 304                 if( !$user || ($user->getId() == 0 && !IP::isIPAddress($offender) ) ) {
 305                         $offender = ''; // Blank field if invalid
 306                 }
 307                 if( count($types) == 1 && $types[0] == 'suppress' ) {
 308                         return Xml::inputLabel( wfMsg('revdelete-offender'), 'offender',
 309                                 'mw-log-offender', 20, $offender );
 310                 }
 311                 return '';
 312         }
 313
 314         /**
 315          * @return string
 316          */
 317         public function beginLogEventsList() {
 318                 return "<ul>\n";
 319         }
 320
 321         /**
 322          * @return string
 323          */
 324         public function endLogEventsList() {
 325                 return "</ul>\n";
 326         }
 327
 328         /**
 329          * @param $row Row: a single row from the result set
 330          * @return String: Formatted HTML list item
 331          */
 332         public function logLine( $row ) {
 333                 $entry = DatabaseLogEntry::newFromRow( $row );
 334                 $formatter = LogFormatter::newFromEntry( $entry );
 335                 $formatter->setShowUserToolLinks( !( $this->flags & self::NO_EXTRA_USER_LINKS ) );
 336
 337                 $action = $formatter->getActionText();
 338                 $comment = $formatter->getComment();
 339
 340                 $classes = array( 'mw-logline-' . $entry->getType() );
 341                 $title = $entry->getTarget();
 342                 $time = $this->logTimestamp( $entry );
 343
 344                 // Extract extra parameters
 345                 $paramArray = LogPage::extractParams( $row->log_params );
 346                 // Add review/revert links and such...
 347                 $revert = $this->logActionLinks( $row, $title, $paramArray, $comment );
 348
 349                 // Some user can hide log items and have review links
 350                 $del = $this->getShowHideLinks( $row );
 351                 if( $del != '' ) $del .= ' ';
 352
 353                 // Any tags...
 354                 list( $tagDisplay, $newClasses ) = ChangeTags::formatSummaryRow( $row->ts_tags, 'logevent' );
 355                 $classes = array_merge( $classes, $newClasses );
 356
 357                 return Xml::tags( 'li', array( "class" => implode( ' ', $classes ) ),
 358                         $del . "$time $action $comment $revert $tagDisplay" ) . "\n";
 359         }
 360
 361         private function logTimestamp( LogEntry $entry ) {
 362                 global $wgLang;
 363                 $time = $wgLang->timeanddate( wfTimestamp( TS_MW, $entry->getTimestamp() ), true );
 364                 return htmlspecialchars( $time );
 365         }
 366
 367         /**
 368          * @TODO: split up!
 369          *
 370          * @param  $row
 371          * @param Title $title
 372          * @param Array $paramArray
 373          * @param  $comment
 374          * @return String
 375          */
 376         private function logActionLinks( $row, $title, $paramArray, &$comment ) {
 377                 global $wgUser;
 378                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the action
 379                         || self::isDeleted( $row, LogPage::DELETED_ACTION ) ) // action is hidden
 380                 {
 381                         return '';
 382                 }
 383                 $revert = '';
 384                 if( self::typeAction( $row, 'move', 'move', 'move' ) && !empty( $paramArray[0] ) ) {
 385                         $destTitle = Title::newFromText( $paramArray[0] );
 386                         if( $destTitle ) {
 387                                 $revert = '(' . Linker::link(
 388                                         SpecialPage::getTitleFor( 'Movepage' ),
 389                                         $this->message['revertmove'],
 390                                         array(),
 391                                         array(
 392                                                 'wpOldTitle' => $destTitle->getPrefixedDBkey(),
 393                                                 'wpNewTitle' => $title->getPrefixedDBkey(),
 394                                                 'wpReason'   => wfMsgForContent( 'revertmove' ),
 395                                                 'wpMovetalk' => 0
 396                                         ),
 397                                         array( 'known', 'noclasses' )
 398                                 ) . ')';
 399                         }
 400                 // Show undelete link
 401                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'delete', 'deletedhistory' ) ) {
 402                         if( !$wgUser->isAllowed( 'undelete' ) ) {
 403                                 $viewdeleted = $this->message['undeleteviewlink'];
 404                         } else {
 405                                 $viewdeleted = $this->message['undeletelink'];
 406                         }
 407                         $revert = '(' . Linker::link(
 408                                 SpecialPage::getTitleFor( 'Undelete' ),
 409                                 $viewdeleted,
 410                                 array(),
 411                                 array( 'target' => $title->getPrefixedDBkey() ),
 412                                 array( 'known', 'noclasses' )
 413                          ) . ')';
 414                 // Show unblock/change block link
 415                 } elseif( self::typeAction( $row, array( 'block', 'suppress' ), array( 'block', 'reblock' ), 'block' ) ) {
 416                         $revert = '(' .
 417                                 Linker::link(
 418                                         SpecialPage::getTitleFor( 'Unblock', $row->log_title ),
 419                                         $this->message['unblocklink'],
 420                                         array(),
 421                                         array(),
 422                                         'known'
 423                                 ) .
 424                                 $this->message['pipe-separator'] .
 425                                 Linker::link(
 426                                         SpecialPage::getTitleFor( 'Block', $row->log_title ),
 427                                         $this->message['change-blocklink'],
 428                                         array(),
 429                                         array(),
 430                                         'known'
 431                                 ) .
 432                                 ')';
 433                 // Show change protection link
 434                 } elseif( self::typeAction( $row, 'protect', array( 'modify', 'protect', 'unprotect' ) ) ) {
 435                         $revert .= ' (' .
 436                                 Linker::link( $title,
 437                                         $this->message['hist'],
 438                                         array(),
 439                                         array(
 440                                                 'action' => 'history',
 441                                                 'offset' => $row->log_timestamp
 442                                         )
 443                                 );
 444                         if( $wgUser->isAllowed( 'protect' ) ) {
 445                                 $revert .= $this->message['pipe-separator'] .
 446                                         Linker::link( $title,
 447                                                 $this->message['protect_change'],
 448                                                 array(),
 449                                                 array( 'action' => 'protect' ),
 450                                                 'known' );
 451                         }
 452                         $revert .= ')';
 453                 // Show unmerge link
 454                 } elseif( self::typeAction( $row, 'merge', 'merge', 'mergehistory' ) ) {
 455                         $revert = '(' . Linker::link(
 456                                 SpecialPage::getTitleFor( 'MergeHistory' ),
 457                                 $this->message['revertmerge'],
 458                                 array(),
 459                                 array(
 460                                         'target' => $paramArray[0],
 461                                         'dest' => $title->getPrefixedDBkey(),
 462                                         'mergepoint' => $paramArray[1]
 463                                 ),
 464                                 array( 'known', 'noclasses' )
 465                         ) . ')';
 466                 // If an edit was hidden from a page give a review link to the history
 467                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'revision', 'deletedhistory' ) ) {
 468                         $revert = RevisionDeleter::getLogLinks( $title, $paramArray,
 469                                                                 $this->message );
 470                 // Hidden log items, give review link
 471                 } elseif( self::typeAction( $row, array( 'delete', 'suppress' ), 'event', 'deletedhistory' ) ) {
 472                         if( count($paramArray) >= 1 ) {
 473                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 474                                 // $paramArray[1] is a CSV of the IDs
 475                                 $query = $paramArray[0];
 476                                 // Link to each hidden object ID, $paramArray[1] is the url param
 477                                 $revert = '(' . Linker::link(
 478                                         $revdel,
 479                                         $this->message['revdel-restore'],
 480                                         array(),
 481                                         array(
 482                                                 'target' => $title->getPrefixedText(),
 483                                                 'type' => 'logging',
 484                                                 'ids' => $query
 485                                         ),
 486                                         array( 'known', 'noclasses' )
 487                                 ) . ')';
 488                         }
 489                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 490                 } else {
 491                         wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 492                                 &$comment, &$revert, $row->log_timestamp ) );
 493                 }
 494                 if( $revert != '' ) {
 495                         $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
 496                 }
 497                 return $revert;
 498         }
 499
 500         /**
 501          * @param $row Row
 502          * @return string
 503          */
 504         private function getShowHideLinks( $row ) {
 505                 global $wgUser;
 506                 if( ( $this->flags & self::NO_ACTION_LINK ) // we don't want to see the links
 507                         || $row->log_type == 'suppress' ) { // no one can hide items from the suppress log
 508                         return '';
 509                 }
 510                 $del = '';
 511                 // Don't show useless link to people who cannot hide revisions
 512                 if( $wgUser->isAllowed( 'deletedhistory' ) ) {
 513                         if( $row->log_deleted || $wgUser->isAllowed( 'deleterevision' ) ) {
 514                                 $canHide = $wgUser->isAllowed( 'deleterevision' );
 515                                 // If event was hidden from sysops
 516                                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 517                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 518                                 } else {
 519                                         $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
 520                                         $query = array(
 521                                                 'target' => $target->getPrefixedDBkey(),
 522                                                 'type'   => 'logging',
 523                                                 'ids'    => $row->log_id,
 524                                         );
 525                                         $del = Linker::revDeleteLink( $query,
 526                                                 self::isDeleted( $row, LogPage::DELETED_RESTRICTED ), $canHide );
 527                                 }
 528                         }
 529                 }
 530                 return $del;
 531         }
 532
 533         /**
 534          * @param $row Row
 535          * @param $type Mixed: string/array
 536          * @param $action Mixed: string/array
 537          * @param $right string
 538          * @return Boolean
 539          */
 540         public static function typeAction( $row, $type, $action, $right='' ) {
 541                 $match = is_array($type) ?
 542                         in_array( $row->log_type, $type ) : $row->log_type == $type;
 543                 if( $match ) {
 544                         $match = is_array( $action ) ?
 545                                 in_array( $row->log_action, $action ) : $row->log_action == $action;
 546                         if( $match && $right ) {
 547                                 global $wgUser;
 548                                 $match = $wgUser->isAllowed( $right );
 549                         }
 550                 }
 551                 return $match;
 552         }
 553
 554         /**
 555          * Determine if the current user is allowed to view a particular
 556          * field of this log row, if it's marked as deleted.
 557          *
 558          * @param $row Row
 559          * @param $field Integer
 560          * @param $user User object to check, or null to use $wgUser
 561          * @return Boolean
 562          */
 563         public static function userCan( $row, $field, User $user = null ) {
 564                 return self::userCanBitfield( $row->log_deleted, $field, $user );
 565         }
 566
 567         /**
 568          * Determine if the current user is allowed to view a particular
 569          * field of this log row, if it's marked as deleted.
 570          *
 571          * @param $bitfield Integer (current field)
 572          * @param $field Integer
 573          * @param $user User object to check, or null to use $wgUser
 574          * @return Boolean
 575          */
 576         public static function userCanBitfield( $bitfield, $field, User $user = null ) {
 577                 if( $bitfield & $field ) {
 578                         if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
 579                                 $permission = 'suppressrevision';
 580                         } else {
 581                                 $permission = 'deletedhistory';
 582                         }
 583                         wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
 584                         if ( $user === null ) {
 585                                 global $wgUser;
 586                                 $user = $wgUser;
 587                         }
 588                         return $user->isAllowed( $permission );
 589                 } else {
 590                         return true;
 591                 }
 592         }
 593
 594         /**
 595          * @param $row Row
 596          * @param $field Integer: one of DELETED_* bitfield constants
 597          * @return Boolean
 598          */
 599         public static function isDeleted( $row, $field ) {
 600                 return ( $row->log_deleted & $field ) == $field;
 601         }
 602
 603         /**
 604          * Show log extract. Either with text and a box (set $msgKey) or without (don't set $msgKey)
 605          *
 606          * @param $out OutputPage|String-by-reference
 607          * @param $types String|Array Log types to show
 608          * @param $page String|Title The page title to show log entries for
 609          * @param $user String The user who made the log entries
 610          * @param $param Associative Array with the following additional options:
 611          * - lim Integer Limit of items to show, default is 50
 612          * - conds Array Extra conditions for the query (e.g. "log_action != 'revision'")
 613          * - showIfEmpty boolean Set to false if you don't want any output in case the loglist is empty
 614          *   if set to true (default), "No matching items in log" is displayed if loglist is empty
 615          * - msgKey Array If you want a nice box with a message, set this to the key of the message.
 616          *   First element is the message key, additional optional elements are parameters for the key
 617          *   that are processed with wgMsgExt and option 'parse'
 618          * - offset Set to overwrite offset parameter in $wgRequest
 619          *   set to '' to unset offset
 620          * - wrap String Wrap the message in html (usually something like "<div ...>$1</div>").
 621          * - flags Integer display flags (NO_ACTION_LINK,NO_EXTRA_USER_LINKS)
 622          * @return Integer Number of total log items (not limited by $lim)
 623          */
 624         public static function showLogExtract(
 625                 &$out, $types=array(), $page='', $user='', $param = array()
 626         ) {
 627                 $defaultParameters = array(
 628                         'lim' => 25,
 629                         'conds' => array(),
 630                         'showIfEmpty' => true,
 631                         'msgKey' => array(''),
 632                         'wrap' => "$1",
 633                         'flags' => 0
 634                 );
 635                 # The + operator appends elements of remaining keys from the right
 636                 # handed array to the left handed, whereas duplicated keys are NOT overwritten.
 637                 $param += $defaultParameters;
 638                 # Convert $param array to individual variables
 639                 $lim = $param['lim'];
 640                 $conds = $param['conds'];
 641                 $showIfEmpty = $param['showIfEmpty'];
 642                 $msgKey = $param['msgKey'];
 643                 $wrap = $param['wrap'];
 644                 $flags = $param['flags'];
 645                 if ( !is_array( $msgKey ) ) {
 646                         $msgKey = array( $msgKey );
 647                 }
 648
 649                 if ( $out instanceof OutputPage ) {
 650                         $context = $out->getContext();
 651                 } else {
 652                         $context = RequestContext::getMain();
 653                 }
 654
 655                 # Insert list of top 50 (or top $lim) items
 656                 $loglist = new LogEventsList( $context->getSkin(), $context->getOutput(), $flags );
 657                 $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
 658                 if ( isset( $param['offset'] ) ) { # Tell pager to ignore $wgRequest offset
 659                         $pager->setOffset( $param['offset'] );
 660                 }
 661                 if( $lim > 0 ) $pager->mLimit = $lim;
 662                 $logBody = $pager->getBody();
 663                 $s = '';
 664                 if( $logBody ) {
 665                         if ( $msgKey[0] ) {
 666                                 $s = '<div class="mw-warning-with-logexcerpt">';
 667
 668                                 if ( count( $msgKey ) == 1 ) {
 669                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ) );
 670                                 } else { // Process additional arguments
 671                                         $args = $msgKey;
 672                                         array_shift( $args );
 673                                         $s .= wfMsgExt( $msgKey[0], array( 'parse' ), $args );
 674                                 }
 675                         }
 676                         $s .= $loglist->beginLogEventsList() .
 677                                  $logBody .
 678                                  $loglist->endLogEventsList();
 679                 } else {
 680                         if ( $showIfEmpty ) {
 681                                 $s = Html::rawElement( 'div', array( 'class' => 'mw-warning-logempty' ),
 682                                         wfMsgExt( 'logempty', array( 'parseinline' ) ) );
 683                         }
 684                 }
 685                 if( $pager->getNumRows() > $pager->mLimit ) { # Show "Full log" link
 686                         $urlParam = array();
 687                         if ( $page instanceof Title ) {
 688                                 $urlParam['page'] = $page->getPrefixedDBkey();
 689                         } elseif ( $page != '' ) {
 690                                 $urlParam['page'] = $page;
 691                         }
 692                         if ( $user != '')
 693                                 $urlParam['user'] = $user;
 694                         if ( !is_array( $types ) ) # Make it an array, if it isn't
 695                                 $types = array( $types );
 696                         # If there is exactly one log type, we can link to Special:Log?type=foo
 697                         if ( count( $types ) == 1 )
 698                                 $urlParam['type'] = $types[0];
 699                         $s .= Linker::link(
 700                                 SpecialPage::getTitleFor( 'Log' ),
 701                                 wfMsgHtml( 'log-fulllog' ),
 702                                 array(),
 703                                 $urlParam
 704                         );
 705                 }
 706                 if ( $logBody && $msgKey[0] ) {
 707                         $s .= '</div>';
 708                 }
 709
 710                 if ( $wrap != '' ) { // Wrap message in html
 711                         $s = str_replace( '$1', $s, $wrap );
 712                 }
 713
 714                 /* hook can return false, if we don't want the message to be emitted (Wikia BugId:7093) */
 715                 if ( wfRunHooks( 'LogEventsListShowLogExtract', array( &$s, $types, $page, $user, $param ) ) ) {
 716                         // $out can be either an OutputPage object or a String-by-reference
 717                         if ( $out instanceof OutputPage ){
 718                                 $out->addHTML( $s );
 719                         } else {
 720                                 $out = $s;
 721                         }
 722                 }
 723
 724                 return $pager->getNumRows();
 725         }
 726
 727         /**
 728          * SQL clause to skip forbidden log types for this user
 729          *
 730          * @param $db DatabaseBase
 731          * @param $audience string, public/user
 732          * @return Mixed: string or false
 733          */
 734         public static function getExcludeClause( $db, $audience = 'public' ) {
 735                 global $wgLogRestrictions, $wgUser;
 736                 // Reset the array, clears extra "where" clauses when $par is used
 737                 $hiddenLogs = array();
 738                 // Don't show private logs to unprivileged users
 739                 foreach( $wgLogRestrictions as $logType => $right ) {
 740                         if( $audience == 'public' || !$wgUser->isAllowed($right) ) {
 741                                 $safeType = $db->strencode( $logType );
 742                                 $hiddenLogs[] = $safeType;
 743                         }
 744                 }
 745                 if( count($hiddenLogs) == 1 ) {
 746                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 747                 } elseif( $hiddenLogs ) {
 748                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 749                 }
 750                 return false;
 751         }
 752  }
 753
 754 /**
 755  * @ingroup Pager
 756  */
 757 class LogPager extends ReverseChronologicalPager {
 758         private $types = array(), $performer = '', $title = '', $pattern = '';
 759         private $typeCGI = '';
 760         public $mLogEventsList;
 761
 762         /**
 763          * Constructor
 764          *
 765          * @param $list LogEventsList
 766          * @param $types String or Array: log types to show
 767          * @param $performer String: the user who made the log entries
 768          * @param $title String|Title: the page title the log entries are for
 769          * @param $pattern String: do a prefix search rather than an exact title match
 770          * @param $conds Array: extra conditions for the query
 771          * @param $year Integer: the year to start from
 772          * @param $month Integer: the month to start from
 773          * @param $tagFilter String: tag
 774          */
 775         public function __construct( $list, $types = array(), $performer = '', $title = '', $pattern = '',
 776                 $conds = array(), $year = false, $month = false, $tagFilter = '' ) {
 777                 parent::__construct( $list->getContext() );
 778                 $this->mConds = $conds;
 779
 780                 $this->mLogEventsList = $list;
 781
 782                 $this->limitType( $types ); // also excludes hidden types
 783                 $this->limitPerformer( $performer );
 784                 $this->limitTitle( $title, $pattern );
 785                 $this->getDateCond( $year, $month );
 786                 $this->mTagFilter = $tagFilter;
 787         }
 788
 789         public function getDefaultQuery() {
 790                 $query = parent::getDefaultQuery();
 791                 $query['type'] = $this->typeCGI; // arrays won't work here
 792                 $query['user'] = $this->performer;
 793                 $query['month'] = $this->mMonth;
 794                 $query['year'] = $this->mYear;
 795                 return $query;
 796         }
 797
 798         // Call ONLY after calling $this->limitType() already!
 799         public function getFilterParams() {
 800                 global $wgFilterLogTypes;
 801                 $filters = array();
 802                 if( count($this->types) ) {
 803                         return $filters;
 804                 }
 805                 foreach( $wgFilterLogTypes as $type => $default ) {
 806                         // Avoid silly filtering
 807                         if( $type !== 'patrol' || $this->getUser()->useNPPatrol() ) {
 808                                 $hide = $this->getRequest()->getInt( "hide_{$type}_log", $default );
 809                                 $filters[$type] = $hide;
 810                                 if( $hide )
 811                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
 812                         }
 813                 }
 814                 return $filters;
 815         }
 816
 817         /**
 818          * Set the log reader to return only entries of the given type.
 819          * Type restrictions enforced here
 820          *
 821          * @param $types String or array: Log types ('upload', 'delete', etc);
 822          *   empty string means no restriction
 823          */
 824         private function limitType( $types ) {
 825                 global $wgLogRestrictions;
 826                 // If $types is not an array, make it an array
 827                 $types = ($types === '') ? array() : (array)$types;
 828                 // Don't even show header for private logs; don't recognize it...
 829                 foreach ( $types as $type ) {
 830                         if( isset( $wgLogRestrictions[$type] )
 831                                 && !$this->getUser()->isAllowed($wgLogRestrictions[$type])
 832                         ) {
 833                                 $types = array_diff( $types, array( $type ) );
 834                         }
 835                 }
 836                 $this->types = $types;
 837                 // Don't show private logs to unprivileged users.
 838                 // Also, only show them upon specific request to avoid suprises.
 839                 $audience = $types ? 'user' : 'public';
 840                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience );
 841                 if( $hideLogs !== false ) {
 842                         $this->mConds[] = $hideLogs;
 843                 }
 844                 if( count($types) ) {
 845                         $this->mConds['log_type'] = $types;
 846                         // Set typeCGI; used in url param for paging
 847                         if( count($types) == 1 ) $this->typeCGI = $types[0];
 848                 }
 849         }
 850
 851         /**
 852          * Set the log reader to return only entries by the given user.
 853          *
 854          * @param $name String: (In)valid user name
 855          */
 856         private function limitPerformer( $name ) {
 857                 if( $name == '' ) {
 858                         return false;
 859                 }
 860                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 861                 if( is_null($usertitle) ) {
 862                         return false;
 863                 }
 864                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 865                 $userid = User::idFromName( $name );
 866                 if( !$userid ) {
 867                         /* It should be nicer to abort query at all,
 868                            but for now it won't pass anywhere behind the optimizer */
 869                         $this->mConds[] = "NULL";
 870                 } else {
 871                         $this->mConds['log_user'] = $userid;
 872                         // Paranoia: avoid brute force searches (bug 17342)
 873                         $user = $this->getUser();
 874                         if( !$user->isAllowed( 'deletedhistory' ) ) {
 875                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::DELETED_USER) . ' = 0';
 876                         } elseif( !$user->isAllowed( 'suppressrevision' ) ) {
 877                                 $this->mConds[] = $this->mDb->bitAnd('log_deleted', LogPage::SUPPRESSED_USER) .
 878                                         ' != ' . LogPage::SUPPRESSED_USER;
 879                         }
 880                         $this->performer = $usertitle->getText();
 881                 }
 882         }
 883
 884         /**
 885          * Set the log reader to return only entries affecting the given page.
 886          * (For the block and rights logs, this is a user page.)
 887          *
 888          * @param $page String or Title object: Title name
 889          * @param $pattern String
 890          */
 891         private function limitTitle( $page, $pattern ) {
 892                 global $wgMiserMode;
 893
 894                 if ( $page instanceof Title ) {
 895                         $title = $page;
 896                 } else {
 897                         $title = Title::newFromText( $page );
 898                         if( strlen( $page ) == 0 || !$title instanceof Title ) {
 899                                 return false;
 900                         }
 901                 }
 902
 903                 $this->title = $title->getPrefixedText();
 904                 $ns = $title->getNamespace();
 905                 $db = $this->mDb;
 906
 907                 # Using the (log_namespace, log_title, log_timestamp) index with a
 908                 # range scan (LIKE) on the first two parts, instead of simple equality,
 909                 # makes it unusable for sorting.  Sorted retrieval using another index
 910                 # would be possible, but then we might have to scan arbitrarily many
 911                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 912                 # is on.
 913                 #
 914                 # This is not a problem with simple title matches, because then we can
 915                 # use the page_time index.  That should have no more than a few hundred
 916                 # log entries for even the busiest pages, so it can be safely scanned
 917                 # in full to satisfy an impossible condition on user or similar.
 918                 if( $pattern && !$wgMiserMode ) {
 919                         $this->mConds['log_namespace'] = $ns;
 920                         $this->mConds[] = 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 921                         $this->pattern = $pattern;
 922                 } else {
 923                         $this->mConds['log_namespace'] = $ns;
 924                         $this->mConds['log_title'] = $title->getDBkey();
 925                 }
 926                 // Paranoia: avoid brute force searches (bug 17342)
 927                 $user = $this->getUser();
 928                 if( !$user->isAllowed( 'deletedhistory' ) ) {
 929                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::DELETED_ACTION) . ' = 0';
 930                 } elseif( !$user->isAllowed( 'suppressrevision' ) ) {
 931                         $this->mConds[] = $db->bitAnd('log_deleted', LogPage::SUPPRESSED_ACTION) .
 932                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 933                 }
 934         }
 935
 936         /**
 937          * Constructs the most part of the query. Extra conditions are sprinkled in
 938          * all over this class.
 939          * @return array
 940          */
 941         public function getQueryInfo() {
 942                 $basic = DatabaseLogEntry::getSelectQueryData();
 943
 944                 $tables = $basic['tables'];
 945                 $fields = $basic['fields'];
 946                 $conds = $basic['conds'];
 947                 $options = $basic['options'];
 948                 $joins = $basic['join_conds'];
 949
 950                 $index = array();
 951                 # Add log_search table if there are conditions on it.
 952                 # This filters the results to only include log rows that have
 953                 # log_search records with the specified ls_field and ls_value values.
 954                 if( array_key_exists( 'ls_field', $this->mConds ) ) {
 955                         $tables[] = 'log_search';
 956                         $index['log_search'] = 'ls_field_val';
 957                         $index['logging'] = 'PRIMARY';
 958                         if ( !$this->hasEqualsClause( 'ls_field' )
 959                                 || !$this->hasEqualsClause( 'ls_value' ) )
 960                         {
 961                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 962                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 963                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 964                                 $options[] = 'DISTINCT';
 965                         }
 966                 # Avoid usage of the wrong index by limiting
 967                 # the choices of available indexes. This mainly
 968                 # avoids site-breaking filesorts.
 969                 } elseif( $this->title || $this->pattern || $this->performer ) {
 970                         $index['logging'] = array( 'page_time', 'user_time' );
 971                         if( count($this->types) == 1 ) {
 972                                 $index['logging'][] = 'log_user_type_time';
 973                         }
 974                 } elseif( count($this->types) == 1 ) {
 975                         $index['logging'] = 'type_time';
 976                 } else {
 977                         $index['logging'] = 'times';
 978                 }
 979                 $options['USE INDEX'] = $index;
 980                 # Don't show duplicate rows when using log_search
 981                 $joins['log_search'] = array( 'INNER JOIN', 'ls_log_id=log_id' );
 982
 983                 $info = array(
 984                         'tables'     => $tables,
 985                         'fields'     => $fields,
 986                         'conds'      => array_merge( $conds, $this->mConds ),
 987                         'options'    => $options,
 988                         'join_conds' => $joins,
 989                 );
 990                 # Add ChangeTags filter query
 991                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 992                         $info['join_conds'], $info['options'], $this->mTagFilter );
 993                 return $info;
 994         }
 995
 996         /**
 997          * Checks if $this->mConds has $field matched to a *single* value
 998          * @param $field
 999          * @return bool
1000          */
1001         protected function hasEqualsClause( $field ) {
1002                 return (
1003                         array_key_exists( $field, $this->mConds ) &&
1004                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
1005                 );
1006         }
1007
1008         function getIndexField() {
1009                 return 'log_timestamp';
1010         }
1011
1012         public function getStartBody() {
1013                 wfProfileIn( __METHOD__ );
1014                 # Do a link batch query
1015                 if( $this->getNumRows() > 0 ) {
1016                         $lb = new LinkBatch;
1017                         foreach ( $this->mResult as $row ) {
1018                                 $lb->add( $row->log_namespace, $row->log_title );
1019                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
1020                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
1021                         }
1022                         $lb->execute();
1023                         $this->mResult->seek( 0 );
1024                 }
1025                 wfProfileOut( __METHOD__ );
1026                 return '';
1027         }
1028
1029         public function formatRow( $row ) {
1030                 return $this->mLogEventsList->logLine( $row );
1031         }
1032
1033         public function getType() {
1034                 return $this->types;
1035         }
1036
1037         /**
1038          * @return string
1039          */
1040         public function getPerformer() {
1041                 return $this->performer;
1042         }
1043
1044         /**
1045          * @return string
1046          */
1047         public function getPage() {
1048                 return $this->title;
1049         }
1050
1051         public function getPattern() {
1052                 return $this->pattern;
1053         }
1054
1055         public function getYear() {
1056                 return $this->mYear;
1057         }
1058
1059         public function getMonth() {
1060                 return $this->mMonth;
1061         }
1062
1063         public function getTagFilter() {
1064                 return $this->mTagFilter;
1065         }
1066
1067         public function doQuery() {
1068                 // Workaround MySQL optimizer bug
1069                 $this->mDb->setBigSelects();
1070                 parent::doQuery();
1071                 $this->mDb->setBigSelects( 'default' );
1072         }
1073 }
1074