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                 $title = Title::newFromText( $page );
 127
 128                 if( strlen( $page ) == 0 || !$title instanceof Title )
 129                         return false;
 130
 131                 $this->title =& $title;
 132                 $this->pattern = $pattern;
 133                 $ns = $title->getNamespace();
 134                 if ( $pattern && !$wgMiserMode ) {
 135                         $safetitle = $this->db->escapeLike( $title->getDBkey() ); // use escapeLike to avoid expensive search patterns like 't%st%'
 136                         $this->whereClauses[] = "log_namespace=$ns AND log_title LIKE '$safetitle%'";
 137                 } else {
 138                         $safetitle = $this->db->strencode( $title->getDBkey() );
 139                         $this->whereClauses[] = "log_namespace=$ns AND log_title = '$safetitle'";
 140                 }
 141         }
 142
 143         /**
 144          * Set the log reader to return only entries in a given time range.
 145          * @param string $time Timestamp of one endpoint
 146          * @param string $direction either ">=" or "<=" operators
 147          * @private
 148          */
 149         function limitTime( $time, $direction ) {
 150                 # Direction should be a comparison operator
 151                 if( empty( $time ) ) {
 152                         return false;
 153                 }
 154                 $safetime = $this->db->strencode( wfTimestamp( TS_MW, $time ) );
 155                 $this->whereClauses[] = "log_timestamp $direction '$safetime'";
 156         }
 157
 158         /**
 159          * Build an SQL query from all the set parameters.
 160          * @return string the SQL query
 161          * @private
 162          */
 163         function getQuery() {
 164                 $logging = $this->db->tableName( "logging" );
 165                 $sql = "SELECT /*! STRAIGHT_JOIN */ log_type, log_action, log_timestamp,
 166                         log_user, user_name,
 167                         log_namespace, log_title, page_id,
 168                         log_comment, log_params FROM $logging ";
 169                 if( !empty( $this->joinClauses ) ) {
 170                         $sql .= implode( ' ', $this->joinClauses );
 171                 }
 172                 if( !empty( $this->whereClauses ) ) {
 173                         $sql .= " WHERE " . implode( ' AND ', $this->whereClauses );
 174                 }
 175                 $sql .= " ORDER BY log_timestamp DESC ";
 176                 $sql = $this->db->limitResult($sql, $this->limit, $this->offset );
 177                 return $sql;
 178         }
 179
 180         /**
 181          * Execute the query and start returning results.
 182          * @return ResultWrapper result object to return the relevant rows
 183          */
 184         function getRows() {
 185                 $res = $this->db->query( $this->getQuery(), 'LogReader::getRows' );
 186                 return $this->db->resultObject( $res );
 187         }
 188
 189         /**
 190          * @return string The query type that this LogReader has been limited to.
 191          */
 192         function queryType() {
 193                 return $this->type;
 194         }
 195
 196         /**
 197          * @return string The username type that this LogReader has been limited to, if any.
 198          */
 199         function queryUser() {
 200                 return $this->user;
 201         }
 202
 203         /**
 204          * @return boolean The checkbox, if titles should be searched by a pattern too
 205          */
 206         function queryPattern() {
 207                 return $this->pattern;
 208         }
 209
 210         /**
 211          * @return string The text of the title that this LogReader has been limited to.
 212          */
 213         function queryTitle() {
 214                 if( is_null( $this->title ) ) {
 215                         return '';
 216                 } else {
 217                         return $this->title->getPrefixedText();
 218                 }
 219         }
 220
 221         /**
 222          * Is there at least one row?
 223          *
 224          * @return bool
 225          */
 226         public function hasRows() {
 227                 # Little hack...
 228                 $limit = $this->limit;
 229                 $this->limit = 1;
 230                 $res = $this->db->query( $this->getQuery() );
 231                 $this->limit = $limit;
 232                 $ret = $this->db->numRows( $res ) > 0;
 233                 $this->db->freeResult( $res );
 234                 return $ret;
 235         }
 236
 237 }
 238
 239 /**
 240  *
 241  * @addtogroup SpecialPage
 242  */
 243 class LogViewer {
 244         /**
 245          * @var LogReader $reader
 246          */
 247         var $reader;
 248         var $numResults = 0;
 249
 250         /**
 251          * @param LogReader &$reader where to get our data from
 252          */
 253         function LogViewer( &$reader ) {
 254                 global $wgUser;
 255                 $this->skin = $wgUser->getSkin();
 256                 $this->reader =& $reader;
 257         }
 258
 259         /**
 260          * Take over the whole output page in $wgOut with the log display.
 261          */
 262         function show() {
 263                 global $wgOut;
 264                 $this->showHeader( $wgOut );
 265                 $this->showOptions( $wgOut );
 266                 $result = $this->getLogRows();
 267                 if ( $this->numResults > 0 ) {
 268                         $this->showPrevNext( $wgOut );
 269                         $this->doShowList( $wgOut, $result );
 270                         $this->showPrevNext( $wgOut );
 271                 } else {
 272                         $this->showError( $wgOut );
 273                 }
 274         }
 275
 276         /**
 277          * Load the data from the linked LogReader
 278          * Preload the link cache
 279          * Initialise numResults
 280          *
 281          * Must be called before calling showPrevNext
 282          *
 283          * @return object database result set
 284          */
 285         function getLogRows() {
 286                 $result = $this->reader->getRows();
 287                 $this->numResults = 0;
 288
 289                 // Fetch results and form a batch link existence query
 290                 $batch = new LinkBatch;
 291                 while ( $s = $result->fetchObject() ) {
 292                         // User link
 293                         $batch->addObj( Title::makeTitleSafe( NS_USER, $s->user_name ) );
 294                         $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $s->user_name ) );
 295
 296                         // Move destination link
 297                         if ( $s->log_type == 'move' ) {
 298                                 $paramArray = LogPage::extractParams( $s->log_params );
 299                                 $title = Title::newFromText( $paramArray[0] );
 300                                 $batch->addObj( $title );
 301                         }
 302                         ++$this->numResults;
 303                 }
 304                 $batch->execute();
 305
 306                 return $result;
 307         }
 308
 309
 310         /**
 311          * Output just the list of entries given by the linked LogReader,
 312          * with extraneous UI elements. Use for displaying log fragments in
 313          * another page (eg at Special:Undelete)
 314          * @param OutputPage $out where to send output
 315          */
 316         function showList( &$out ) {
 317                 $result = $this->getLogRows();
 318                 if ( $this->numResults > 0 ) {
 319                         $this->doShowList( $out, $result );
 320                 } else {
 321                         $this->showError( $out );
 322                 }
 323         }
 324
 325         function doShowList( &$out, $result ) {
 326                 // Rewind result pointer and go through it again, making the HTML
 327                 $html = "\n<ul>\n";
 328                 $result->seek( 0 );
 329                 while( $s = $result->fetchObject() ) {
 330                         $html .= $this->logLine( $s );
 331                 }
 332                 $html .= "\n</ul>\n";
 333                 $out->addHTML( $html );
 334                 $result->free();
 335         }
 336
 337         function showError( &$out ) {
 338                 $out->addWikiText( wfMsg( 'logempty' ) );
 339         }
 340
 341         /**
 342          * @param Object $s a single row from the result set
 343          * @return string Formatted HTML list item
 344          * @private
 345          */
 346         function logLine( $s ) {
 347                 global $wgLang, $wgUser;;
 348                 $skin = $wgUser->getSkin();
 349                 $title = Title::makeTitle( $s->log_namespace, $s->log_title );
 350                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $s->log_timestamp), true );
 351
 352                 // Enter the existence or non-existence of this page into the link cache,
 353                 // for faster makeLinkObj() in LogPage::actionText()
 354                 $linkCache =& LinkCache::singleton();
 355                 if( $s->page_id ) {
 356                         $linkCache->addGoodLinkObj( $s->page_id, $title );
 357                 } else {
 358                         $linkCache->addBadLinkObj( $title );
 359                 }
 360
 361                 $userLink = $this->skin->userLink( $s->log_user, $s->user_name ) . $this->skin->userToolLinksRedContribs( $s->log_user, $s->user_name );
 362                 $comment = $this->skin->commentBlock( $s->log_comment );
 363                 $paramArray = LogPage::extractParams( $s->log_params );
 364                 $revert = '';
 365                 // show revertmove link
 366                 if ( $s->log_type == 'move' && isset( $paramArray[0] ) ) {
 367                         $destTitle = Title::newFromText( $paramArray[0] );
 368                         if ( $destTitle ) {
 369                                 $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Movepage' ),
 370                                         wfMsg( 'revertmove' ),
 371                                         'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 372                                         '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 373                                         '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 374                                         '&wpMovetalk=0' ) . ')';
 375                         }
 376                 // show undelete link
 377                 } elseif ( $s->log_action == 'delete' && $wgUser->isAllowed( 'delete' ) ) {
 378                         $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Undelete' ),
 379                                 wfMsg( 'undeletebtn' ) ,
 380                                 'target='. urlencode( $title->getPrefixedDBkey() ) ) . ')';
 381
 382                 // show unblock link
 383                 } elseif ( $s->log_action == 'block' && $wgUser->isAllowed( 'block' ) ) {
 384                         $revert = '(' .  $skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Ipblocklist' ),
 385                                 wfMsg( 'unblocklink' ),
 386                                 'action=unblock&ip=' . urlencode( $s->log_title ) ) . ')';
 387                 // show change protection link
 388                 } elseif ( ( $s->log_action == 'protect' || $s->log_action == 'modify' ) && $wgUser->isAllowed( 'protect' ) ) {
 389                         $revert = '(' .  $skin->makeKnownLinkObj( $title, wfMsg( 'protect_change' ), 'action=unprotect' ) . ')';
 390                 // show user tool links for self created users
 391                 // TODO: The extension should be handling this, get it out of core!
 392                 } elseif ( $s->log_action == 'create2' ) {
 393                         if( isset( $paramArray[0] ) ) {
 394                                 $revert = $this->skin->userToolLinks( $paramArray[0], $s->log_title, true );
 395                         } else {
 396                                 # Fall back to a blue contributions link
 397                                 $revert = $this->skin->userToolLinks( 1, $s->log_title );
 398                         }
 399                         # Suppress $comment from old entries, not needed and can contain incorrect links
 400                         $comment = '';
 401                 }
 402
 403                 $action = LogPage::actionText( $s->log_type, $s->log_action, $title, $this->skin, $paramArray, true, true );
 404                 $out = "<li>$time $userLink $action $comment $revert</li>\n";
 405                 return $out;
 406         }
 407
 408         /**
 409          * @param OutputPage &$out where to send output
 410          * @private
 411          */
 412         function showHeader( &$out ) {
 413                 $type = $this->reader->queryType();
 414                 if( LogPage::isLogType( $type ) ) {
 415                         $out->setPageTitle( LogPage::logName( $type ) );
 416                         $out->addWikiText( LogPage::logHeader( $type ) );
 417                 }
 418         }
 419
 420         /**
 421          * @param OutputPage &$out where to send output
 422          * @private
 423          */
 424         function showOptions( &$out ) {
 425                 global $wgScript, $wgMiserMode;
 426                 $action = htmlspecialchars( $wgScript );
 427                 $title = SpecialPage::getTitleFor( 'Log' );
 428                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
 429                 $out->addHTML( "<form action=\"$action\" method=\"get\">\n" .
 430                         '<fieldset>' .
 431                         Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
 432                         Xml::hidden( 'title', $special ) . "\n" .
 433                         $this->getTypeMenu() . "\n" .
 434                         $this->getUserInput() . "\n" .
 435                         $this->getTitleInput() . "\n" .
 436                         (!$wgMiserMode?($this->getTitlePattern()."\n"):"") .
 437                         Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "\n" .
 438                         "</fieldset></form>" );
 439         }
 440
 441         /**
 442          * @return string Formatted HTML
 443          * @private
 444          */
 445         function getTypeMenu() {
 446                 $out = "<select name='type'>\n";
 447
 448                 $validTypes = LogPage::validTypes();
 449                 $m = array(); // Temporary array
 450
 451                 // First pass to load the log names
 452                 foreach( $validTypes as $type ) {
 453                         $text = LogPage::logName( $type );
 454                         $m[$text] = $type;
 455                 }
 456
 457                 // Second pass to sort by name
 458                 ksort($m);
 459
 460                 // Third pass generates sorted XHTML content
 461                 foreach( $m as $text => $type ) {
 462                         $selected = ($type == $this->reader->queryType());
 463                         $out .= Xml::option( $text, $type, $selected ) . "\n";
 464                 }
 465
 466                 $out .= '</select>';
 467                 return $out;
 468         }
 469
 470         /**
 471          * @return string Formatted HTML
 472          * @private
 473          */
 474         function getUserInput() {
 475                 $user =  $this->reader->queryUser();
 476                 return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'user', 12, $user );
 477         }
 478
 479         /**
 480          * @return string Formatted HTML
 481          * @private
 482          */
 483         function getTitleInput() {
 484                 $title = $this->reader->queryTitle();
 485                 return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'page', 20, $title );
 486         }
 487
 488         /**
 489          * @return boolean Checkbox
 490          * @private
 491          */
 492         function getTitlePattern() {
 493                 $pattern = $this->reader->queryPattern();
 494                 return Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern );
 495         }
 496
 497         /**
 498          * @param OutputPage &$out where to send output
 499          * @private
 500          */
 501         function showPrevNext( &$out ) {
 502                 global $wgContLang,$wgRequest;
 503                 $pieces = array();
 504                 $pieces[] = 'type=' . urlencode( $this->reader->queryType() );
 505                 $pieces[] = 'user=' . urlencode( $this->reader->queryUser() );
 506                 $pieces[] = 'page=' . urlencode( $this->reader->queryTitle() );
 507                 $pieces[] = 'pattern=' . urlencode( $this->reader->queryPattern() );
 508                 $bits = implode( '&', $pieces );
 509                 list( $limit, $offset ) = $wgRequest->getLimitOffset();
 510
 511                 # TODO: use timestamps instead of offsets to make it more natural
 512                 # to go huge distances in time
 513                 $html = wfViewPrevNext( $offset, $limit,
 514                         $wgContLang->specialpage( 'Log' ),
 515                         $bits,
 516                         $this->numResults < $limit);
 517                 $out->addHTML( '<p>' . $html . '</p>' );
 518         }
 519 }
 520
 521
 522