includes/logging/LogPager.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 /**
  27  * @ingroup Pager
  28  */
  29 class LogPager extends ReverseChronologicalPager {
  30         private $types = array(), $performer = '', $title = '', $pattern = '';
  31         private $typeCGI = '';
  32         public $mLogEventsList;
  33
  34         /**
  35          * Constructor
  36          *
  37          * @param LogEventsList $list
  38          * @param string $types or Array: log types to show
  39          * @param string $performer the user who made the log entries
  40          * @param string|Title $title the page title the log entries are for
  41          * @param string $pattern do a prefix search rather than an exact title match
  42          * @param array $conds extra conditions for the query
  43          * @param int $year The year to start from
  44          * @param int $month The month to start from
  45          * @param string $tagFilter tag
  46          */
  47         public function __construct( $list, $types = array(), $performer = '', $title = '', $pattern = '',
  48                 $conds = array(), $year = false, $month = false, $tagFilter = '' ) {
  49                 parent::__construct( $list->getContext() );
  50                 $this->mConds = $conds;
  51
  52                 $this->mLogEventsList = $list;
  53
  54                 $this->limitType( $types ); // also excludes hidden types
  55                 $this->limitPerformer( $performer );
  56                 $this->limitTitle( $title, $pattern );
  57                 $this->getDateCond( $year, $month );
  58                 $this->mTagFilter = $tagFilter;
  59         }
  60
  61         public function getDefaultQuery() {
  62                 $query = parent::getDefaultQuery();
  63                 $query['type'] = $this->typeCGI; // arrays won't work here
  64                 $query['user'] = $this->performer;
  65                 $query['month'] = $this->mMonth;
  66                 $query['year'] = $this->mYear;
  67                 return $query;
  68         }
  69
  70         // Call ONLY after calling $this->limitType() already!
  71         public function getFilterParams() {
  72                 global $wgFilterLogTypes;
  73                 $filters = array();
  74                 if ( count( $this->types ) ) {
  75                         return $filters;
  76                 }
  77                 foreach ( $wgFilterLogTypes as $type => $default ) {
  78                         // Avoid silly filtering
  79                         if ( $type !== 'patrol' || $this->getUser()->useNPPatrol() ) {
  80                                 $hide = $this->getRequest()->getInt( "hide_{$type}_log", $default );
  81                                 $filters[$type] = $hide;
  82                                 if ( $hide ) {
  83                                         $this->mConds[] = 'log_type != ' . $this->mDb->addQuotes( $type );
  84                                 }
  85                         }
  86                 }
  87                 return $filters;
  88         }
  89
  90         /**
  91          * Set the log reader to return only entries of the given type.
  92          * Type restrictions enforced here
  93          *
  94          * @param string $types or array: Log types ('upload', 'delete', etc);
  95          *   empty string means no restriction
  96          */
  97         private function limitType( $types ) {
  98                 global $wgLogRestrictions;
  99
 100                 $user = $this->getUser();
 101                 // If $types is not an array, make it an array
 102                 $types = ( $types === '' ) ? array() : (array)$types;
 103                 // Don't even show header for private logs; don't recognize it...
 104                 $needReindex = false;
 105                 foreach ( $types as $type ) {
 106                         if ( isset( $wgLogRestrictions[$type] )
 107                                 && !$user->isAllowed( $wgLogRestrictions[$type] )
 108                         ) {
 109                                 $needReindex = true;
 110                                 $types = array_diff( $types, array( $type ) );
 111                         }
 112                 }
 113                 if ( $needReindex ) {
 114                         // Lots of this code makes assumptions that
 115                         // the first entry in the array is $types[0].
 116                         $types = array_values( $types );
 117                 }
 118                 $this->types = $types;
 119                 // Don't show private logs to unprivileged users.
 120                 // Also, only show them upon specific request to avoid suprises.
 121                 $audience = $types ? 'user' : 'public';
 122                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb, $audience, $user );
 123                 if ( $hideLogs !== false ) {
 124                         $this->mConds[] = $hideLogs;
 125                 }
 126                 if ( count( $types ) ) {
 127                         $this->mConds['log_type'] = $types;
 128                         // Set typeCGI; used in url param for paging
 129                         if ( count( $types ) == 1 ) {
 130                                 $this->typeCGI = $types[0];
 131                         }
 132                 }
 133         }
 134
 135         /**
 136          * Set the log reader to return only entries by the given user.
 137          *
 138          * @param string $name (In)valid user name
 139          * @return bool
 140          */
 141         private function limitPerformer( $name ) {
 142                 if ( $name == '' ) {
 143                         return false;
 144                 }
 145                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 146                 if ( is_null( $usertitle ) ) {
 147                         return false;
 148                 }
 149                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 150                 $userid = User::idFromName( $name );
 151                 if ( !$userid ) {
 152                         /* It should be nicer to abort query at all,
 153                            but for now it won't pass anywhere behind the optimizer */
 154                         $this->mConds[] = "NULL";
 155                 } else {
 156                         $this->mConds['log_user'] = $userid;
 157                         // Paranoia: avoid brute force searches (bug 17342)
 158                         $user = $this->getUser();
 159                         if ( !$user->isAllowed( 'deletedhistory' ) ) {
 160                                 $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::DELETED_USER ) . ' = 0';
 161                         } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
 162                                 $this->mConds[] = $this->mDb->bitAnd( 'log_deleted', LogPage::SUPPRESSED_USER ) .
 163                                         ' != ' . LogPage::SUPPRESSED_USER;
 164                         }
 165                         $this->performer = $usertitle->getText();
 166                 }
 167         }
 168
 169         /**
 170          * Set the log reader to return only entries affecting the given page.
 171          * (For the block and rights logs, this is a user page.)
 172          *
 173          * @param string $page or Title object: Title name
 174          * @param $pattern String
 175          * @return bool
 176          */
 177         private function limitTitle( $page, $pattern ) {
 178                 global $wgMiserMode;
 179
 180                 if ( $page instanceof Title ) {
 181                         $title = $page;
 182                 } else {
 183                         $title = Title::newFromText( $page );
 184                         if ( strlen( $page ) == 0 || !$title instanceof Title ) {
 185                                 return false;
 186                         }
 187                 }
 188
 189                 $this->title = $title->getPrefixedText();
 190                 $ns = $title->getNamespace();
 191                 $db = $this->mDb;
 192
 193                 # Using the (log_namespace, log_title, log_timestamp) index with a
 194                 # range scan (LIKE) on the first two parts, instead of simple equality,
 195                 # makes it unusable for sorting.  Sorted retrieval using another index
 196                 # would be possible, but then we might have to scan arbitrarily many
 197                 # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
 198                 # is on.
 199                 #
 200                 # This is not a problem with simple title matches, because then we can
 201                 # use the page_time index.  That should have no more than a few hundred
 202                 # log entries for even the busiest pages, so it can be safely scanned
 203                 # in full to satisfy an impossible condition on user or similar.
 204                 if ( $pattern && !$wgMiserMode ) {
 205                         $this->mConds['log_namespace'] = $ns;
 206                         $this->mConds[] = 'log_title ' . $db->buildLike( $title->getDBkey(), $db->anyString() );
 207                         $this->pattern = $pattern;
 208                 } else {
 209                         $this->mConds['log_namespace'] = $ns;
 210                         $this->mConds['log_title'] = $title->getDBkey();
 211                 }
 212                 // Paranoia: avoid brute force searches (bug 17342)
 213                 $user = $this->getUser();
 214                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 215                         $this->mConds[] = $db->bitAnd( 'log_deleted', LogPage::DELETED_ACTION ) . ' = 0';
 216                 } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
 217                         $this->mConds[] = $db->bitAnd( 'log_deleted', LogPage::SUPPRESSED_ACTION ) .
 218                                 ' != ' . LogPage::SUPPRESSED_ACTION;
 219                 }
 220         }
 221
 222         /**
 223          * Constructs the most part of the query. Extra conditions are sprinkled in
 224          * all over this class.
 225          * @return array
 226          */
 227         public function getQueryInfo() {
 228                 $basic = DatabaseLogEntry::getSelectQueryData();
 229
 230                 $tables = $basic['tables'];
 231                 $fields = $basic['fields'];
 232                 $conds = $basic['conds'];
 233                 $options = $basic['options'];
 234                 $joins = $basic['join_conds'];
 235
 236                 $index = array();
 237                 # Add log_search table if there are conditions on it.
 238                 # This filters the results to only include log rows that have
 239                 # log_search records with the specified ls_field and ls_value values.
 240                 if ( array_key_exists( 'ls_field', $this->mConds ) ) {
 241                         $tables[] = 'log_search';
 242                         $index['log_search'] = 'ls_field_val';
 243                         $index['logging'] = 'PRIMARY';
 244                         if ( !$this->hasEqualsClause( 'ls_field' )
 245                                 || !$this->hasEqualsClause( 'ls_value' ) )
 246                         {
 247                                 # Since (ls_field,ls_value,ls_logid) is unique, if the condition is
 248                                 # to match a specific (ls_field,ls_value) tuple, then there will be
 249                                 # no duplicate log rows. Otherwise, we need to remove the duplicates.
 250                                 $options[] = 'DISTINCT';
 251                         }
 252                 # Avoid usage of the wrong index by limiting
 253                 # the choices of available indexes. This mainly
 254                 # avoids site-breaking filesorts.
 255                 } elseif ( $this->title || $this->pattern || $this->performer ) {
 256                         $index['logging'] = array( 'page_time', 'user_time' );
 257                         if ( count( $this->types ) == 1 ) {
 258                                 $index['logging'][] = 'log_user_type_time';
 259                         }
 260                 } elseif ( count( $this->types ) == 1 ) {
 261                         $index['logging'] = 'type_time';
 262                 } else {
 263                         $index['logging'] = 'times';
 264                 }
 265                 $options['USE INDEX'] = $index;
 266                 # Don't show duplicate rows when using log_search
 267                 $joins['log_search'] = array( 'INNER JOIN', 'ls_log_id=log_id' );
 268
 269                 $info = array(
 270                         'tables' => $tables,
 271                         'fields' => $fields,
 272                         'conds' => array_merge( $conds, $this->mConds ),
 273                         'options' => $options,
 274                         'join_conds' => $joins,
 275                 );
 276                 # Add ChangeTags filter query
 277                 ChangeTags::modifyDisplayQuery( $info['tables'], $info['fields'], $info['conds'],
 278                         $info['join_conds'], $info['options'], $this->mTagFilter );
 279                 return $info;
 280         }
 281
 282         /**
 283          * Checks if $this->mConds has $field matched to a *single* value
 284          * @param $field
 285          * @return bool
 286          */
 287         protected function hasEqualsClause( $field ) {
 288                 return (
 289                         array_key_exists( $field, $this->mConds ) &&
 290                         ( !is_array( $this->mConds[$field] ) || count( $this->mConds[$field] ) == 1 )
 291                 );
 292         }
 293
 294         function getIndexField() {
 295                 return 'log_timestamp';
 296         }
 297
 298         public function getStartBody() {
 299                 wfProfileIn( __METHOD__ );
 300                 # Do a link batch query
 301                 if ( $this->getNumRows() > 0 ) {
 302                         $lb = new LinkBatch;
 303                         foreach ( $this->mResult as $row ) {
 304                                 $lb->add( $row->log_namespace, $row->log_title );
 305                                 $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 306                                 $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 307                                 $formatter = LogFormatter::newFromRow( $row );
 308                                 foreach ( $formatter->getPreloadTitles() as $title ) {
 309                                         $lb->addObj( $title );
 310                                 }
 311                         }
 312                         $lb->execute();
 313                         $this->mResult->seek( 0 );
 314                 }
 315                 wfProfileOut( __METHOD__ );
 316                 return '';
 317         }
 318
 319         public function formatRow( $row ) {
 320                 return $this->mLogEventsList->logLine( $row );
 321         }
 322
 323         public function getType() {
 324                 return $this->types;
 325         }
 326
 327         /**
 328          * @return string
 329          */
 330         public function getPerformer() {
 331                 return $this->performer;
 332         }
 333
 334         /**
 335          * @return string
 336          */
 337         public function getPage() {
 338                 return $this->title;
 339         }
 340
 341         public function getPattern() {
 342                 return $this->pattern;
 343         }
 344
 345         public function getYear() {
 346                 return $this->mYear;
 347         }
 348
 349         public function getMonth() {
 350                 return $this->mMonth;
 351         }
 352
 353         public function getTagFilter() {
 354                 return $this->mTagFilter;
 355         }
 356
 357         public function doQuery() {
 358                 // Workaround MySQL optimizer bug
 359                 $this->mDb->setBigSelects();
 360                 parent::doQuery();
 361                 $this->mDb->setBigSelects( 'default' );
 362         }
 363 }