includes/SpecialLog.php

   1 <?php
   2 # Copyright (C) 2004 Brion Vibber <brion@pobox.com>
   3 # http://www.mediawiki.org/
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License along
  16 # with this program; if not, write to the Free Software Foundation, Inc.,
  17 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18 # http://www.gnu.org/copyleft/gpl.html
  19
  20 /**
  21  *
  22  * @addtogroup SpecialPage
  23  */
  24
  25 /**
  26  * constructor
  27  */
  28 function wfSpecialLog( $par = '' ) {
  29         global $wgRequest;
  30         $logReader = new LogReader( $wgRequest );
  31         if( $wgRequest->getVal( 'type' ) == '' && $par != '' ) {
  32                 $logReader->limitType( $par );
  33         }
  34         $logViewer = new LogViewer( $logReader );
  35         $logViewer->show();
  36 }
  37
  38 /**
  39  *
  40  * @addtogroup SpecialPage
  41  */
  42 class LogReader {
  43         var $db, $joinClauses, $whereClauses;
  44         var $type = '', $user = '', $title = null, $pattern = false;
  45
  46         /**
  47          * @param WebRequest $request For internal use use a FauxRequest object to pass arbitrary parameters.
  48          */
  49         function LogReader( $request ) {
  50                 $this->db = wfGetDB( DB_SLAVE );
  51                 $this->setupQuery( $request );
  52         }
  53
  54         /**
  55          * Basic setup and applies the limiting factors from the WebRequest object.
  56          * @param WebRequest $request
  57          * @private
  58          */
  59         function setupQuery( $request ) {
  60                 $page = $this->db->tableName( 'page' );
  61                 $user = $this->db->tableName( 'user' );
  62                 $this->joinClauses = array(
  63                         "LEFT OUTER JOIN $page ON log_namespace=page_namespace AND log_title=page_title",
  64                         "INNER JOIN $user ON user_id=log_user" );
  65                 $this->whereClauses = array();
  66
  67                 $this->limitType( $request->getVal( 'type' ) );
  68                 $this->limitUser( $request->getText( 'user' ) );
  69                 $this->limitTitle( $request->getText( 'page' ) , $request->getBool( 'pattern' ) );
  70                 $this->limitTime( $request->getVal( 'from' ), '>=' );
  71                 $this->limitTime( $request->getVal( 'until' ), '<=' );
  72
  73                 list( $this->limit, $this->offset ) = $request->getLimitOffset();
  74
  75                 // XXX This all needs to use Pager, ugly hack for now.
  76                 global $wgMiserMode;
  77                 if( $wgMiserMode )
  78                         $this->offset = min( $this->offset, 10000 );
  79         }
  80
  81         /**
  82          * Set the log reader to return only entries of the given type.
  83          * @param string $type A log type ('upload', 'delete', etc)
  84          * @private
  85          */
  86         function limitType( $type ) {
  87                 if( empty( $type ) ) {
  88                         return false;
  89                 }
  90                 $this->type = $type;
  91                 $safetype = $this->db->strencode( $type );
  92                 $this->whereClauses[] = "log_type='$safetype'";
  93         }
  94
  95         /**
  96          * Set the log reader to return only entries by the given user.
  97          * @param string $name (In)valid user name
  98          * @private
  99          */
 100         function limitUser( $name ) {
 101                 if ( $name == '' )
 102                         return false;
 103                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 104                 if ( is_null( $usertitle ) )
 105                         return false;
 106                 $this->user = $usertitle->getText();
 107
 108                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 109                 $userid = $this->db->selectField('user','user_id',array('user_name'=>$this->user));
 110                 if (!$userid)
 111                         /* It should be nicer to abort query at all,
 112                            but for now it won't pass anywhere behind the optimizer */
 113                         $this->whereClauses[] = "NULL";
 114                 else
 115                         $this->whereClauses[] = "log_user=$userid";
 116         }
 117
 118         /**
 119          * Set the log reader to return only entries affecting the given page.
 120          * (For the block and rights logs, this is a user page.)
 121          * @param string $page Title name as text
 122          * @private
 123          */
 124         function limitTitle( $page , $pattern ) {
 125                 global $wgMiserMode;
 126
 127                 $title = Title::newFromText( $page );
 128
 129                 if( strlen( $page ) == 0 || !$title instanceof Title )
 130                         return false;
 131
 132                 $this->title =& $title;
 133                 $this->pattern = $pattern;
 134                 $ns = $title->getNamespace();
 135                 if ( $pattern && !$wgMiserMode ) {
 136                         $safetitle = $this->db->escapeLike( $title->getDBkey() ); // use escapeLike to avoid expensive search patterns like 't%st%'
 137                         $this->whereClauses[] = "log_namespace=$ns AND log_title LIKE '$safetitle%'";
 138                 } else {
 139                         $safetitle = $this->db->strencode( $title->getDBkey() );
 140                         $this->whereClauses[] = "log_namespace=$ns AND log_title = '$safetitle'";
 141                 }
 142         }
 143
 144         /**
 145          * Set the log reader to return only entries in a given time range.
 146          * @param string $time Timestamp of one endpoint
 147          * @param string $direction either ">=" or "<=" operators
 148          * @private
 149          */
 150         function limitTime( $time, $direction ) {
 151                 # Direction should be a comparison operator
 152                 if( empty( $time ) ) {
 153                         return false;
 154                 }
 155                 $safetime = $this->db->strencode( wfTimestamp( TS_MW, $time ) );
 156                 $this->whereClauses[] = "log_timestamp $direction '$safetime'";
 157         }
 158
 159         /**
 160          * Build an SQL query from all the set parameters.
 161          * @return string the SQL query
 162          * @private
 163          */
 164         function getQuery() {
 165                 $logging = $this->db->tableName( "logging" );
 166                 $sql = "SELECT /*! STRAIGHT_JOIN */ log_type, log_action, log_timestamp,
 167                         log_user, user_name,
 168                         log_namespace, log_title, page_id,
 169                         log_comment, log_params FROM $logging ";
 170                 if( !empty( $this->joinClauses ) ) {
 171                         $sql .= implode( ' ', $this->joinClauses );
 172                 }
 173                 if( !empty( $this->whereClauses ) ) {
 174                         $sql .= " WHERE " . implode( ' AND ', $this->whereClauses );
 175                 }
 176                 $sql .= " ORDER BY log_timestamp DESC ";
 177                 $sql = $this->db->limitResult($sql, $this->limit, $this->offset );
 178                 return $sql;
 179         }
 180
 181         /**
 182          * Execute the query and start returning results.
 183          * @return ResultWrapper result object to return the relevant rows
 184          */
 185         function getRows() {
 186                 $res = $this->db->query( $this->getQuery(), __METHOD__ );
 187                 return $this->db->resultObject( $res );
 188         }
 189
 190         /**
 191          * @return string The query type that this LogReader has been limited to.
 192          */
 193         function queryType() {
 194                 return $this->type;
 195         }
 196
 197         /**
 198          * @return string The username type that this LogReader has been limited to, if any.
 199          */
 200         function queryUser() {
 201                 return $this->user;
 202         }
 203
 204         /**
 205          * @return boolean The checkbox, if titles should be searched by a pattern too
 206          */
 207         function queryPattern() {
 208                 return $this->pattern;
 209         }
 210
 211         /**
 212          * @return string The text of the title that this LogReader has been limited to.
 213          */
 214         function queryTitle() {
 215                 if( is_null( $this->title ) ) {
 216                         return '';
 217                 } else {
 218                         return $this->title->getPrefixedText();
 219                 }
 220         }
 221
 222         /**
 223          * Is there at least one row?
 224          *
 225          * @return bool
 226          */
 227         public function hasRows() {
 228                 # Little hack...
 229                 $limit = $this->limit;
 230                 $this->limit = 1;
 231                 $res = $this->db->query( $this->getQuery() );
 232                 $this->limit = $limit;
 233                 $ret = $this->db->numRows( $res ) > 0;
 234                 $this->db->freeResult( $res );
 235                 return $ret;
 236         }
 237
 238 }
 239
 240 /**
 241  *
 242  * @addtogroup SpecialPage
 243  */
 244 class LogViewer {
 245         const NO_ACTION_LINK = 1;
 246
 247         /**
 248          * @var LogReader $reader
 249          */
 250         var $reader;
 251         var $numResults = 0;
 252         var $flags = 0;
 253
 254         /**
 255          * @param LogReader &$reader where to get our data from
 256          * @param integer $flags Bitwise combination of flags:
 257          *     self::NO_ACTION_LINK   Don't show restore/unblock/block links
 258          */
 259         function LogViewer( &$reader, $flags = 0 ) {
 260                 global $wgUser;
 261                 $this->skin = $wgUser->getSkin();
 262                 $this->reader =& $reader;
 263                 $this->flags = $flags;
 264         }
 265
 266         /**
 267          * Take over the whole output page in $wgOut with the log display.
 268          */
 269         function show() {
 270                 global $wgOut;
 271                 $this->showHeader( $wgOut );
 272                 $this->showOptions( $wgOut );
 273                 $result = $this->getLogRows();
 274                 if ( $this->numResults > 0 ) {
 275                         $this->showPrevNext( $wgOut );
 276                         $this->doShowList( $wgOut, $result );
 277                         $this->showPrevNext( $wgOut );
 278                 } else {
 279                         $this->showError( $wgOut );
 280                 }
 281         }
 282
 283         /**
 284          * Load the data from the linked LogReader
 285          * Preload the link cache
 286          * Initialise numResults
 287          *
 288          * Must be called before calling showPrevNext
 289          *
 290          * @return object database result set
 291          */
 292         function getLogRows() {
 293                 $result = $this->reader->getRows();
 294                 $this->numResults = 0;
 295
 296                 // Fetch results and form a batch link existence query
 297                 $batch = new LinkBatch;
 298                 while ( $s = $result->fetchObject() ) {
 299                         // User link
 300                         $batch->addObj( Title::makeTitleSafe( NS_USER, $s->user_name ) );
 301                         $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $s->user_name ) );
 302
 303                         // Move destination link
 304                         if ( $s->log_type == 'move' ) {
 305                                 $paramArray = LogPage::extractParams( $s->log_params );
 306                                 $title = Title::newFromText( $paramArray[0] );
 307                                 $batch->addObj( $title );
 308                         }
 309                         ++$this->numResults;
 310                 }
 311                 $batch->execute();
 312
 313                 return $result;
 314         }
 315
 316
 317         /**
 318          * Output just the list of entries given by the linked LogReader,
 319          * with extraneous UI elements. Use for displaying log fragments in
 320          * another page (eg at Special:Undelete)
 321          * @param OutputPage $out where to send output
 322          */
 323         function showList( &$out ) {
 324                 $result = $this->getLogRows();
 325                 if ( $this->numResults > 0 ) {
 326                         $this->doShowList( $out, $result );
 327                 } else {
 328                         $this->showError( $out );
 329                 }
 330         }
 331
 332         function doShowList( &$out, $result ) {
 333                 // Rewind result pointer and go through it again, making the HTML
 334                 $html = "\n<ul>\n";
 335                 $result->seek( 0 );
 336                 while( $s = $result->fetchObject() ) {
 337                         $html .= $this->logLine( $s );
 338                 }
 339                 $html .= "\n</ul>\n";
 340                 $out->addHTML( $html );
 341                 $result->free();
 342         }
 343
 344         function showError( &$out ) {
 345                 $out->addWikiText( wfMsg( 'logempty' ) );
 346         }
 347
 348         /**
 349          * @param Object $s a single row from the result set
 350          * @return string Formatted HTML list item
 351          * @private
 352          */
 353         function logLine( $s ) {
 354                 global $wgLang, $wgUser, $wgContLang;
 355                 $skin = $wgUser->getSkin();
 356                 $title = Title::makeTitle( $s->log_namespace, $s->log_title );
 357                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $s->log_timestamp), true );
 358
 359                 // Enter the existence or non-existence of this page into the link cache,
 360                 // for faster makeLinkObj() in LogPage::actionText()
 361                 $linkCache =& LinkCache::singleton();
 362                 if( $s->page_id ) {
 363                         $linkCache->addGoodLinkObj( $s->page_id, $title );
 364                 } else {
 365                         $linkCache->addBadLinkObj( $title );
 366                 }
 367
 368                 $userLink = $this->skin->userLink( $s->log_user, $s->user_name ) . $this->skin->userToolLinksRedContribs( $s->log_user, $s->user_name );
 369                 $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $s->log_comment );
 370                 $paramArray = LogPage::extractParams( $s->log_params );
 371                 $revert = '';
 372                 // show revertmove link
 373                 if ( !( $this->flags & self::NO_ACTION_LINK ) ) {
 374                         if ( $s->log_type == 'move' && isset( $paramArray[0] ) && $wgUser->isAllowed( 'move' ) ) {
 375                                 $destTitle = Title::newFromText( $paramArray[0] );
 376                                 if ( $destTitle ) {
 377                                         $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Movepage' ),
 378                                                 wfMsg( 'revertmove' ),
 379                                                 'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 380                                                 '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 381                                                 '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 382                                                 '&wpMovetalk=0' ) . ')';
 383                                 }
 384                         // show undelete link
 385                         } elseif ( $s->log_action == 'delete' && $wgUser->isAllowed( 'delete' ) ) {
 386                                 $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Undelete' ),
 387                                         wfMsg( 'undeletebtn' ) ,
 388                                         'target='. urlencode( $title->getPrefixedDBkey() ) ) . ')';
 389                         // show unblock link
 390                         } elseif ( $s->log_action == 'block' && $wgUser->isAllowed( 'block' ) ) {
 391                                 $revert = '(' .  $skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Ipblocklist' ),
 392                                         wfMsg( 'unblocklink' ),
 393                                         'action=unblock&ip=' . urlencode( $s->log_title ) ) . ')';
 394                         // show change protection link
 395                         } elseif ( ( $s->log_action == 'protect' || $s->log_action == 'modify' ) && $wgUser->isAllowed( 'protect' ) ) {
 396                                 $revert = '(' .  $skin->makeKnownLinkObj( $title, wfMsg( 'protect_change' ), 'action=unprotect' ) . ')';
 397                         // Show unmerge link
 398                         } elseif ( $s->log_action == 'merge' ) {
 399                                 $merge = SpecialPage::getTitleFor( 'Mergehistory' );
 400                                 $revert = '(' .  $this->skin->makeKnownLinkObj( $merge, wfMsg('revertmerge'),
 401                                         wfArrayToCGI(
 402                                                 array('target' => $paramArray[0], 'dest' => $title->getPrefixedText(), 'mergepoint' => $paramArray[1] )
 403                                         )
 404                                 ) . ')';
 405                         } elseif ( wfRunHooks( 'LogLine', array( $s->log_type, $s->log_action, $title, $paramArray, &$comment, &$revert ) ) ) {
 406                                 // wfDebug( "Invoked LogLine hook for " $s->log_type . ", " . $s->log_action . "\n" );
 407                                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 408                         }
 409                 }
 410
 411                 $action = LogPage::actionText( $s->log_type, $s->log_action, $title, $this->skin, $paramArray, true );
 412                 $out = "<li>$time $userLink $action $comment $revert</li>\n";
 413                 return $out;
 414         }
 415
 416         /**
 417          * @param OutputPage &$out where to send output
 418          * @private
 419          */
 420         function showHeader( &$out ) {
 421                 $type = $this->reader->queryType();
 422                 if( LogPage::isLogType( $type ) ) {
 423                         $out->setPageTitle( LogPage::logName( $type ) );
 424                         $out->addWikiText( LogPage::logHeader( $type ) );
 425                 }
 426         }
 427
 428         /**
 429          * @param OutputPage &$out where to send output
 430          * @private
 431          */
 432         function showOptions( &$out ) {
 433                 global $wgScript, $wgMiserMode;
 434                 $action = htmlspecialchars( $wgScript );
 435                 $title = SpecialPage::getTitleFor( 'Log' );
 436                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
 437                 $out->addHTML( "<form action=\"$action\" method=\"get\">\n" .
 438                         '<fieldset>' .
 439                         Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
 440                         Xml::hidden( 'title', $special ) . "\n" .
 441                         $this->getTypeMenu() . "\n" .
 442                         $this->getUserInput() . "\n" .
 443                         $this->getTitleInput() . "\n" .
 444                         (!$wgMiserMode?($this->getTitlePattern()."\n"):"") .
 445                         Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "\n" .
 446                         "</fieldset></form>" );
 447         }
 448
 449         /**
 450          * @return string Formatted HTML
 451          * @private
 452          */
 453         function getTypeMenu() {
 454                 $out = "<select name='type'>\n";
 455
 456                 $validTypes = LogPage::validTypes();
 457                 $m = array(); // Temporary array
 458
 459                 // First pass to load the log names
 460                 foreach( $validTypes as $type ) {
 461                         $text = LogPage::logName( $type );
 462                         $m[$text] = $type;
 463                 }
 464
 465                 // Second pass to sort by name
 466                 ksort($m);
 467
 468                 // Third pass generates sorted XHTML content
 469                 foreach( $m as $text => $type ) {
 470                         $selected = ($type == $this->reader->queryType());
 471                         $out .= Xml::option( $text, $type, $selected ) . "\n";
 472                 }
 473
 474                 $out .= '</select>';
 475                 return $out;
 476         }
 477
 478         /**
 479          * @return string Formatted HTML
 480          * @private
 481          */
 482         function getUserInput() {
 483                 $user =  $this->reader->queryUser();
 484                 return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'user', 12, $user );
 485         }
 486
 487         /**
 488          * @return string Formatted HTML
 489          * @private
 490          */
 491         function getTitleInput() {
 492                 $title = $this->reader->queryTitle();
 493                 return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'page', 20, $title );
 494         }
 495
 496         /**
 497          * @return boolean Checkbox
 498          * @private
 499          */
 500         function getTitlePattern() {
 501                 $pattern = $this->reader->queryPattern();
 502                 return Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern );
 503         }
 504
 505         /**
 506          * @param OutputPage &$out where to send output
 507          * @private
 508          */
 509         function showPrevNext( &$out ) {
 510                 global $wgContLang,$wgRequest;
 511                 $pieces = array();
 512                 $pieces[] = 'type=' . urlencode( $this->reader->queryType() );
 513                 $pieces[] = 'user=' . urlencode( $this->reader->queryUser() );
 514                 $pieces[] = 'page=' . urlencode( $this->reader->queryTitle() );
 515                 $pieces[] = 'pattern=' . urlencode( $this->reader->queryPattern() );
 516                 $bits = implode( '&', $pieces );
 517                 list( $limit, $offset ) = $wgRequest->getLimitOffset();
 518
 519                 # TODO: use timestamps instead of offsets to make it more natural
 520                 # to go huge distances in time
 521                 $html = wfViewPrevNext( $offset, $limit,
 522                         $wgContLang->specialpage( 'Log' ),
 523                         $bits,
 524                         $this->numResults < $limit);
 525                 $out->addHTML( '<p>' . $html . '</p>' );
 526         }
 527 }