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 # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 # http://www.gnu.org/copyleft/gpl.html
  19
  20 /**
  21  *
  22  * @package MediaWiki
  23  * @subpackage SpecialPage
  24  */
  25
  26 /**
  27  * constructor
  28  */
  29 function wfSpecialLog( $par = '' ) {
  30         global $wgRequest;
  31         $logReader =& new LogReader( $wgRequest );
  32         if( '' == $wgRequest->getVal( 'type' ) && !empty( $par ) ) {
  33                 $logReader->limitType( $par );
  34         }
  35         $logViewer =& new LogViewer( $logReader );
  36         $logViewer->show();
  37 }
  38
  39 /**
  40  *
  41  * @package MediaWiki
  42  * @subpackage SpecialPage
  43  */
  44 class LogReader {
  45         var $db, $joinClauses, $whereClauses;
  46         var $type = '', $user = '', $title = null;
  47
  48         /**
  49          * @param WebRequest $request For internal use use a FauxRequest object to pass arbitrary parameters.
  50          */
  51         function LogReader( $request ) {
  52                 $this->db =& wfGetDB( DB_SLAVE );
  53                 $this->setupQuery( $request );
  54         }
  55
  56         /**
  57          * Basic setup and applies the limiting factors from the WebRequest object.
  58          * @param WebRequest $request
  59          * @private
  60          */
  61         function setupQuery( $request ) {
  62                 $page = $this->db->tableName( 'page' );
  63                 $user = $this->db->tableName( 'user' );
  64                 $this->joinClauses = array( "LEFT OUTER JOIN $page ON log_namespace=page_namespace AND log_title=page_title" );
  65                 $this->whereClauses = array( 'user_id=log_user' );
  66
  67                 $this->limitType( $request->getVal( 'type' ) );
  68                 $this->limitUser( $request->getText( 'user' ) );
  69                 $this->limitTitle( $request->getText( 'page' ) );
  70                 $this->limitTime( $request->getVal( 'from' ), '>=' );
  71                 $this->limitTime( $request->getVal( 'until' ), '<=' );
  72
  73                 list( $this->limit, $this->offset ) = $request->getLimitOffset();
  74         }
  75
  76         /**
  77          * Set the log reader to return only entries of the given type.
  78          * @param string $type A log type ('upload', 'delete', etc)
  79          * @private
  80          */
  81         function limitType( $type ) {
  82                 if( empty( $type ) ) {
  83                         return false;
  84                 }
  85                 $this->type = $type;
  86                 $safetype = $this->db->strencode( $type );
  87                 $this->whereClauses[] = "log_type='$safetype'";
  88         }
  89
  90         /**
  91          * Set the log reader to return only entries by the given user.
  92          * @param string $name Valid user name
  93          * @private
  94          */
  95         function limitUser( $name ) {
  96                 $title = Title::makeTitle( NS_USER, $name );
  97                 if( empty( $name ) || is_null( $title ) ) {
  98                         return false;
  99                 }
 100                 $this->user = str_replace( '_', ' ', $title->getDBkey() );
 101                 $safename = $this->db->strencode( $this->user );
 102                 $user = $this->db->tableName( 'user' );
 103                 $this->whereClauses[] = "user_name='$safename'";
 104         }
 105
 106         /**
 107          * Set the log reader to return only entries affecting the given page.
 108          * (For the block and rights logs, this is a user page.)
 109          * @param string $page Title name as text
 110          * @private
 111          */
 112         function limitTitle( $page ) {
 113                 $title = Title::newFromText( $page );
 114                 if( empty( $page ) || is_null( $title )  ) {
 115                         return false;
 116                 }
 117                 $this->title =& $title;
 118                 $safetitle = $this->db->strencode( $title->getDBkey() );
 119                 $ns = $title->getNamespace();
 120                 $this->whereClauses[] = "log_namespace=$ns AND log_title='$safetitle'";
 121         }
 122
 123         /**
 124          * Set the log reader to return only entries in a given time range.
 125          * @param string $time Timestamp of one endpoint
 126          * @param string $direction either ">=" or "<=" operators
 127          * @private
 128          */
 129         function limitTime( $time, $direction ) {
 130                 # Direction should be a comparison operator
 131                 if( empty( $time ) ) {
 132                         return false;
 133                 }
 134                 $safetime = $this->db->strencode( wfTimestamp( TS_MW, $time ) );
 135                 $this->whereClauses[] = "log_timestamp $direction '$safetime'";
 136         }
 137
 138         /**
 139          * Build an SQL query from all the set parameters.
 140          * @return string the SQL query
 141          * @private
 142          */
 143         function getQuery() {
 144                 $logging = $this->db->tableName( "logging" );
 145                 $user = $this->db->tableName( 'user' );
 146                 $sql = "SELECT log_type, log_action, log_timestamp,
 147                         log_user, user_name,
 148                         log_namespace, log_title, page_id,
 149                         log_comment, log_params FROM $user, $logging ";
 150                 if( !empty( $this->joinClauses ) ) {
 151                         $sql .= implode( ',', $this->joinClauses );
 152                 }
 153                 if( !empty( $this->whereClauses ) ) {
 154                         $sql .= " WHERE " . implode( ' AND ', $this->whereClauses );
 155                 }
 156                 $sql .= " ORDER BY log_timestamp DESC ";
 157                 $sql = $this->db->limitResult($sql, $this->limit, $this->offset );
 158                 return $sql;
 159         }
 160
 161         /**
 162          * Execute the query and start returning results.
 163          * @return ResultWrapper result object to return the relevant rows
 164          */
 165         function getRows() {
 166                 $res = $this->db->query( $this->getQuery() );
 167                 return $this->db->resultObject( $res );
 168         }
 169
 170         /**
 171          * @return string The query type that this LogReader has been limited to.
 172          */
 173         function queryType() {
 174                 return $this->type;
 175         }
 176
 177         /**
 178          * @return string The username type that this LogReader has been limited to, if any.
 179          */
 180         function queryUser() {
 181                 return $this->user;
 182         }
 183
 184         /**
 185          * @return string The text of the title that this LogReader has been limited to.
 186          */
 187         function queryTitle() {
 188                 if( is_null( $this->title ) ) {
 189                         return '';
 190                 } else {
 191                         return $this->title->getPrefixedText();
 192                 }
 193         }
 194 }
 195
 196 /**
 197  *
 198  * @package MediaWiki
 199  * @subpackage SpecialPage
 200  */
 201 class LogViewer {
 202         /**
 203          * @var LogReader $reader
 204          */
 205         var $reader;
 206         var $numResults = 0;
 207
 208         /**
 209          * @param LogReader &$reader where to get our data from
 210          */
 211         function LogViewer( &$reader ) {
 212                 global $wgUser;
 213                 $this->skin =& $wgUser->getSkin();
 214                 $this->reader =& $reader;
 215         }
 216
 217         /**
 218          * Take over the whole output page in $wgOut with the log display.
 219          */
 220         function show() {
 221                 global $wgOut;
 222                 $this->showHeader( $wgOut );
 223                 $this->showOptions( $wgOut );
 224                 $result = $this->getLogRows();
 225                 $this->showPrevNext( $wgOut );
 226                 $this->doShowList( $wgOut, $result );
 227                 $this->showPrevNext( $wgOut );
 228         }
 229
 230         /**
 231          * Load the data from the linked LogReader
 232          * Preload the link cache
 233          * Initialise numResults
 234          *
 235          * Must be called before calling showPrevNext
 236          *
 237          * @return object database result set
 238          */
 239         function getLogRows() {
 240                 global $wgLinkCache;
 241                 $result = $this->reader->getRows();
 242                 $this->numResults = 0;
 243
 244                 // Fetch results and form a batch link existence query
 245                 $batch = new LinkBatch;
 246                 while ( $s = $result->fetchObject() ) {
 247                         // User link
 248                         $title = Title::makeTitleSafe( NS_USER, $s->user_name );
 249                         $batch->addObj( $title );
 250
 251                         // Move destination link
 252                         if ( $s->log_type == 'move' ) {
 253                                 $paramArray = LogPage::extractParams( $s->log_params );
 254                                 $title = Title::newFromText( $paramArray[0] );
 255                                 $batch->addObj( $title );
 256                         }
 257                         $this->numResults++;
 258                 }
 259                 $batch->execute( $wgLinkCache );
 260
 261                 return $result;
 262         }
 263
 264
 265         /**
 266          * Output just the list of entries given by the linked LogReader,
 267          * with extraneous UI elements. Use for displaying log fragments in
 268          * another page (eg at Special:Undelete)
 269          * @param OutputPage $out where to send output
 270          */
 271         function showList( &$out ) {
 272                 $this->doShowList( $out, $this->getLogRows() );
 273         }
 274
 275         function doShowList( &$out, $result ) {
 276                 // Rewind result pointer and go through it again, making the HTML
 277                 $html='';
 278                 if ($this->numResults > 0) {
 279                         $html = "\n<ul>\n";
 280                         $result->seek( 0 );
 281                         while( $s = $result->fetchObject() ) {
 282                                 $html .= $this->logLine( $s );
 283                         }
 284                         $html .= "\n</ul>\n";
 285                 }
 286                 $result->free();
 287                 $out->addHTML( $html );
 288         }
 289
 290         /**
 291          * @param Object $s a single row from the result set
 292          * @return string Formatted HTML list item
 293          * @private
 294          */
 295         function logLine( $s ) {
 296                 global $wgLang, $wgLinkCache;
 297                 $title = Title::makeTitle( $s->log_namespace, $s->log_title );
 298                 $user = Title::makeTitleSafe( NS_USER, $s->user_name );
 299                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $s->log_timestamp), true );
 300
 301                 // Enter the existence or non-existence of this page into the link cache,
 302                 // for faster makeLinkObj() in LogPage::actionText()
 303                 if( $s->page_id ) {
 304                         $wgLinkCache->addGoodLinkObj( $s->page_id, $title );
 305                 } else {
 306                         $wgLinkCache->addBadLinkObj( $title );
 307                 }
 308
 309                 $userLink = $this->skin->makeLinkObj( $user, htmlspecialchars( $s->user_name ) );
 310                 $comment = $this->skin->commentBlock( $s->log_comment );
 311                 $paramArray = LogPage::extractParams( $s->log_params );
 312                 $revert = '';
 313                 if ( $s->log_type == 'move' && isset( $paramArray[0] ) ) {
 314                         $specialTitle = Title::makeTitle( NS_SPECIAL, 'Movepage' );
 315                         $destTitle = Title::newFromText( $paramArray[0] );
 316                         if ( $destTitle ) {
 317                                 $revert = '(' . $this->skin->makeKnownLinkObj( $specialTitle, wfMsg( 'revertmove' ),
 318                                         'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 319                                         '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 320                                         '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 321                                         '&wpMovetalk=0' ) . ')';
 322                         }
 323                 }
 324
 325                 $action = LogPage::actionText( $s->log_type, $s->log_action, $title, $this->skin, $paramArray, true );
 326                 $out = "<li>$time $userLink $action $comment $revert</li>\n";
 327                 return $out;
 328         }
 329
 330         /**
 331          * @param OutputPage &$out where to send output
 332          * @private
 333          */
 334         function showHeader( &$out ) {
 335                 $type = $this->reader->queryType();
 336                 if( LogPage::isLogType( $type ) ) {
 337                         $out->setPageTitle( LogPage::logName( $type ) );
 338                         $out->addWikiText( LogPage::logHeader( $type ) );
 339                 }
 340         }
 341
 342         /**
 343          * @param OutputPage &$out where to send output
 344          * @private
 345          */
 346         function showOptions( &$out ) {
 347                 global $wgScript;
 348                 $action = htmlspecialchars( $wgScript );
 349                 $title = Title::makeTitle( NS_SPECIAL, 'Log' );
 350                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
 351                 $out->addHTML( "<form action=\"$action\" method=\"get\">\n" .
 352                         "<input type='hidden' name='title' value=\"$special\" />\n" .
 353                         $this->getTypeMenu() .
 354                         $this->getUserInput() .
 355                         $this->getTitleInput() .
 356                         "<input type='submit' value=\"" . wfMsg( 'allpagessubmit' ) . "\" />" .
 357                         "</form>" );
 358         }
 359
 360         /**
 361          * @return string Formatted HTML
 362          * @private
 363          */
 364         function getTypeMenu() {
 365                 $out = "<select name='type'>\n";
 366                 foreach( LogPage::validTypes() as $type ) {
 367                         $text = htmlspecialchars( LogPage::logName( $type ) );
 368                         $selected = ($type == $this->reader->queryType()) ? ' selected="selected"' : '';
 369                         $out .= "<option value=\"$type\"$selected>$text</option>\n";
 370                 }
 371                 $out .= "</select>\n";
 372                 return $out;
 373         }
 374
 375         /**
 376          * @return string Formatted HTML
 377          * @private
 378          */
 379         function getUserInput() {
 380                 $user = htmlspecialchars( $this->reader->queryUser() );
 381                 return wfMsg('specialloguserlabel') . "<input type='text' name='user' size='12' value=\"$user\" />\n";
 382         }
 383
 384         /**
 385          * @return string Formatted HTML
 386          * @private
 387          */
 388         function getTitleInput() {
 389                 $title = htmlspecialchars( $this->reader->queryTitle() );
 390                 return wfMsg('speciallogtitlelabel') . "<input type='text' name='page' size='20' value=\"$title\" />\n";
 391         }
 392
 393         /**
 394          * @param OutputPage &$out where to send output
 395          * @private
 396          */
 397         function showPrevNext( &$out ) {
 398                 global $wgContLang,$wgRequest;
 399                 $pieces = array();
 400                 $pieces[] = 'type=' . urlencode( $this->reader->queryType() );
 401                 $pieces[] = 'user=' . urlencode( $this->reader->queryUser() );
 402                 $pieces[] = 'page=' . urlencode( $this->reader->queryTitle() );
 403                 $bits = implode( '&', $pieces );
 404                 list( $limit, $offset ) = $wgRequest->getLimitOffset();
 405
 406                 # TODO: use timestamps instead of offsets to make it more natural
 407                 # to go huge distances in time
 408                 $html = wfViewPrevNext( $offset, $limit,
 409                         $wgContLang->specialpage( 'Log' ),
 410                         $bits,
 411                         $this->numResults < $limit);
 412                 $out->addHTML( '<p>' . $html . '</p>' );
 413         }
 414 }
 415
 416
 417 ?>