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( $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                 return $this->db->resultObject( $this->db->query( $this->getQuery() ) );
 167         }
 168
 169         /**
 170          * @return string The query type that this LogReader has been limited to.
 171          */
 172         function queryType() {
 173                 return $this->type;
 174         }
 175
 176         /**
 177          * @return string The username type that this LogReader has been limited to, if any.
 178          */
 179         function queryUser() {
 180                 return $this->user;
 181         }
 182
 183         /**
 184          * @return string The text of the title that this LogReader has been limited to.
 185          */
 186         function queryTitle() {
 187                 if( is_null( $this->title ) ) {
 188                         return '';
 189                 } else {
 190                         return $this->title->getPrefixedText();
 191                 }
 192         }
 193 }
 194
 195 /**
 196  *
 197  * @package MediaWiki
 198  * @subpackage SpecialPage
 199  */
 200 class LogViewer {
 201         /**
 202          * @var LogReader $reader
 203          */
 204         var $reader;
 205
 206         /**
 207          * @param LogReader &$reader where to get our data from
 208          */
 209         function LogViewer( &$reader ) {
 210                 global $wgUser;
 211                 $this->skin =& $wgUser->getSkin();
 212                 $this->reader =& $reader;
 213         }
 214
 215         /**
 216          * Take over the whole output page in $wgOut with the log display.
 217          */
 218         function show() {
 219                 global $wgOut;
 220                 $this->showHeader( $wgOut );
 221                 $this->showOptions( $wgOut );
 222                 $this->showPrevNext( $wgOut );
 223                 $this->showList( $wgOut );
 224                 $this->showPrevNext( $wgOut );
 225         }
 226
 227         /**
 228          * Output just the list of entries given by the linked LogReader,
 229          * with extraneous UI elements. Use for displaying log fragments in
 230          * another page (eg at Special:Undelete)
 231          * @param OutputPage $out where to send output
 232          */
 233         function showList( &$out ) {
 234                 global $wgLinkCache;
 235                 $result = $this->reader->getRows();
 236
 237                 // Fetch results and form a batch link existence query
 238                 $batch = new LinkBatch;
 239                 while ( $s = $result->fetchObject() ) {
 240                         // User link
 241                         $title = Title::makeTitleSafe( NS_USER, $s->user_name );
 242                         $batch->addObj( $title );
 243
 244                         // Move destination link
 245                         if ( $s->log_type == 'move' ) {
 246                                 $paramArray = LogPage::extractParams( $s->log_params );
 247                                 $title = Title::newFromText( $paramArray[0] );
 248                                 $batch->addObj( $title );
 249                         }
 250                 }
 251                 $batch->execute( $wgLinkCache );
 252
 253                 // Rewind result pointer and go through it again, making the HTML
 254                 $result->seek( 0 );
 255                 $html = "\n<ul>\n";
 256                 while( $s = $result->fetchObject() ) {
 257                         $html .= $this->logLine( $s );
 258                 }
 259                 $result->free();
 260                 $html .= "\n</ul>\n";
 261                 $out->addHTML( $html );
 262         }
 263
 264         /**
 265          * @param Object $s a single row from the result set
 266          * @return string Formatted HTML list item
 267          * @private
 268          */
 269         function logLine( $s ) {
 270                 global $wgLang, $wgLinkCache;
 271                 $title = Title::makeTitle( $s->log_namespace, $s->log_title );
 272                 $user = Title::makeTitleSafe( NS_USER, $s->user_name );
 273                 $time = $wgLang->timeanddate( $s->log_timestamp, true );
 274
 275                 // Enter the existence or non-existence of this page into the link cache,
 276                 // for faster makeLinkObj() in LogPage::actionText()
 277                 if( $s->page_id ) {
 278                         $wgLinkCache->addGoodLink( $s->page_id, $title->getPrefixedText() );
 279                 } else {
 280                         $wgLinkCache->addBadLink( $title->getPrefixedText() );
 281                 }
 282
 283                 $userLink = $this->skin->makeLinkObj( $user, htmlspecialchars( $s->user_name ) );
 284                 $comment = $this->skin->commentBlock( $s->log_comment );
 285                 $paramArray = LogPage::extractParams( $s->log_params );
 286                 $revert = '';
 287                 if ( $s->log_type == 'move' && isset( $paramArray[0] ) ) {
 288                         $specialTitle = Title::makeTitle( NS_SPECIAL, 'Movepage' );
 289                         $destTitle = Title::newFromText( $paramArray[0] );
 290                         if ( $destTitle ) {
 291                                 $revert = '(' . $this->skin->makeKnownLinkObj( $specialTitle, wfMsg( 'revertmove' ),
 292                                         'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 293                                         '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 294                                         '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 295                                         '&wpMovetalk=0' ) . ')';
 296                         }
 297                 }
 298
 299                 $action = LogPage::actionText( $s->log_type, $s->log_action, $title, $this->skin, $paramArray, true );
 300                 $out = "<li>$time $userLink $action $comment $revert</li>\n";
 301                 return $out;
 302         }
 303
 304         /**
 305          * @param OutputPage &$out where to send output
 306          * @private
 307          */
 308         function showHeader( &$out ) {
 309                 $type = $this->reader->queryType();
 310                 if( LogPage::isLogType( $type ) ) {
 311                         $out->setPageTitle( LogPage::logName( $type ) );
 312                         $out->addWikiText( LogPage::logHeader( $type ) );
 313                 }
 314         }
 315
 316         /**
 317          * @param OutputPage &$out where to send output
 318          * @private
 319          */
 320         function showOptions( &$out ) {
 321                 global $wgScript;
 322                 $action = htmlspecialchars( $wgScript );
 323                 $title = Title::makeTitle( NS_SPECIAL, 'Log' );
 324                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
 325                 $out->addHTML( "<form action=\"$action\" method=\"get\">\n" .
 326                         "<input type='hidden' name='title' value=\"$special\" />\n" .
 327                         $this->getTypeMenu() .
 328                         $this->getUserInput() .
 329                         $this->getTitleInput() .
 330                         "<input type='submit' value=\"" . wfMsg( 'querybtn' ) . "\" />" .
 331                         "</form>" );
 332         }
 333
 334         /**
 335          * @return string Formatted HTML
 336          * @private
 337          */
 338         function getTypeMenu() {
 339                 $out = "<select name='type'>\n";
 340                 foreach( LogPage::validTypes() as $type ) {
 341                         $text = htmlspecialchars( LogPage::logName( $type ) );
 342                         $selected = ($type == $this->reader->queryType()) ? ' selected="selected"' : '';
 343                         $out .= "<option value=\"$type\"$selected>$text</option>\n";
 344                 }
 345                 $out .= "</select>\n";
 346                 return $out;
 347         }
 348
 349         /**
 350          * @return string Formatted HTML
 351          * @private
 352          */
 353         function getUserInput() {
 354                 $user = htmlspecialchars( $this->reader->queryUser() );
 355                 return wfMsg('specialloguserlabel') . "<input type='text' name='user' size='12' value=\"$user\" />\n";
 356         }
 357
 358         /**
 359          * @return string Formatted HTML
 360          * @private
 361          */
 362         function getTitleInput() {
 363                 $title = htmlspecialchars( $this->reader->queryTitle() );
 364                 return wfMsg('speciallogtitlelabel') . "<input type='text' name='page' size='20' value=\"$title\" />\n";
 365         }
 366
 367         /**
 368          * @param OutputPage &$out where to send output
 369          * @private
 370          */
 371         function showPrevNext( &$out ) {
 372                 global $wgContLang,$wgRequest;
 373                 $pieces = array();
 374                 $pieces[] = 'type=' . htmlspecialchars( $this->reader->queryType() );
 375                 $pieces[] = 'user=' . htmlspecialchars( $this->reader->queryUser() );
 376                 $pieces[] = 'page=' . htmlspecialchars( $this->reader->queryTitle() );
 377                 $bits = implode( '&', $pieces );
 378                 list( $limit, $offset ) = $wgRequest->getLimitOffset();
 379
 380                 # TODO: use timestamps instead of offsets to make it more natural
 381                 # to go huge distances in time
 382                 $html = wfViewPrevNext( $offset, $limit,
 383                         $wgContLang->specialpage( 'Log' ),
 384                         $bits,
 385                         false);
 386                 $out->addHTML( '<p>' . $html . '</p>' );
 387         }
 388 }
 389
 390
 391 ?>