includes/specialpage/ChangesListSpecialPage.php

   1 <?php
   2 /**
   3  * Special page which uses a ChangesList to show query results.
   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  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Special page which uses a ChangesList to show query results.
  26  * @todo Way too many public functions, most of them should be protected
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 abstract class ChangesListSpecialPage extends SpecialPage {
  31         /** @var string */
  32         protected $rcSubpage;
  33
  34         /** @var FormOptions */
  35         protected $rcOptions;
  36
  37         /** @var array */
  38         protected $customFilters;
  39
  40         /**
  41          * Main execution point
  42          *
  43          * @param string $subpage
  44          */
  45         public function execute( $subpage ) {
  46                 $this->rcSubpage = $subpage;
  47
  48                 $this->setHeaders();
  49                 $this->outputHeader();
  50                 $this->addModules();
  51
  52                 $rows = $this->getRows();
  53                 $opts = $this->getOptions();
  54                 if ( $rows === false ) {
  55                         if ( !$this->including() ) {
  56                                 $this->doHeader( $opts, 0 );
  57                                 $this->getOutput()->setStatusCode( 404 );
  58                         }
  59
  60                         return;
  61                 }
  62
  63                 $batch = new LinkBatch;
  64                 foreach ( $rows as $row ) {
  65                         $batch->add( NS_USER, $row->rc_user_text );
  66                         $batch->add( NS_USER_TALK, $row->rc_user_text );
  67                         $batch->add( $row->rc_namespace, $row->rc_title );
  68                         if ( $row->rc_source === RecentChange::SRC_LOG ) {
  69                                 $formatter = LogFormatter::newFromRow( $row );
  70                                 foreach ( $formatter->getPreloadTitles() as $title ) {
  71                                         $batch->addObj( $title );
  72                                 }
  73                         }
  74                 }
  75                 $batch->execute();
  76
  77                 $this->webOutput( $rows, $opts );
  78
  79                 $rows->free();
  80         }
  81
  82         /**
  83          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
  84          *
  85          * @return bool|ResultWrapper Result or false
  86          */
  87         public function getRows() {
  88                 $opts = $this->getOptions();
  89                 $conds = $this->buildMainQueryConds( $opts );
  90
  91                 return $this->doMainQuery( $conds, $opts );
  92         }
  93
  94         /**
  95          * Get the current FormOptions for this request
  96          *
  97          * @return FormOptions
  98          */
  99         public function getOptions() {
 100                 if ( $this->rcOptions === null ) {
 101                         $this->rcOptions = $this->setup( $this->rcSubpage );
 102                 }
 103
 104                 return $this->rcOptions;
 105         }
 106
 107         /**
 108          * Create a FormOptions object with options as specified by the user
 109          *
 110          * @param array $parameters
 111          *
 112          * @return FormOptions
 113          */
 114         public function setup( $parameters ) {
 115                 $opts = $this->getDefaultOptions();
 116                 foreach ( $this->getCustomFilters() as $key => $params ) {
 117                         $opts->add( $key, $params['default'] );
 118                 }
 119
 120                 $opts = $this->fetchOptionsFromRequest( $opts );
 121
 122                 // Give precedence to subpage syntax
 123                 if ( $parameters !== null ) {
 124                         $this->parseParameters( $parameters, $opts );
 125                 }
 126
 127                 $this->validateOptions( $opts );
 128
 129                 return $opts;
 130         }
 131
 132         /**
 133          * Get a FormOptions object containing the default options. By default returns some basic options,
 134          * you might want to not call parent method and discard them, or to override default values.
 135          *
 136          * @return FormOptions
 137          */
 138         public function getDefaultOptions() {
 139                 $config = $this->getConfig();
 140                 $opts = new FormOptions();
 141
 142                 $opts->add( 'hideminor', false );
 143                 $opts->add( 'hidebots', false );
 144                 $opts->add( 'hideanons', false );
 145                 $opts->add( 'hideliu', false );
 146                 $opts->add( 'hidepatrolled', false );
 147                 $opts->add( 'hidemyself', false );
 148
 149                 if ( $config->get( 'RCWatchCategoryMembership' ) ) {
 150                         $opts->add( 'hidecategorization', false );
 151                 }
 152
 153                 $opts->add( 'namespace', '', FormOptions::INTNULL );
 154                 $opts->add( 'invert', false );
 155                 $opts->add( 'associated', false );
 156
 157                 return $opts;
 158         }
 159
 160         /**
 161          * Get custom show/hide filters
 162          *
 163          * @return array Map of filter URL param names to properties (msg/default)
 164          */
 165         protected function getCustomFilters() {
 166                 if ( $this->customFilters === null ) {
 167                         $this->customFilters = array();
 168                         Hooks::run( 'ChangesListSpecialPageFilters', array( $this, &$this->customFilters ) );
 169                 }
 170
 171                 return $this->customFilters;
 172         }
 173
 174         /**
 175          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
 176          *
 177          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
 178          *
 179          * @param FormOptions $opts
 180          * @return FormOptions
 181          */
 182         protected function fetchOptionsFromRequest( $opts ) {
 183                 $opts->fetchValuesFromRequest( $this->getRequest() );
 184
 185                 return $opts;
 186         }
 187
 188         /**
 189          * Process $par and put options found in $opts. Used when including the page.
 190          *
 191          * @param string $par
 192          * @param FormOptions $opts
 193          */
 194         public function parseParameters( $par, FormOptions $opts ) {
 195                 // nothing by default
 196         }
 197
 198         /**
 199          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
 200          *
 201          * @param FormOptions $opts
 202          */
 203         public function validateOptions( FormOptions $opts ) {
 204                 // nothing by default
 205         }
 206
 207         /**
 208          * Return an array of conditions depending of options set in $opts
 209          *
 210          * @param FormOptions $opts
 211          * @return array
 212          */
 213         public function buildMainQueryConds( FormOptions $opts ) {
 214                 $dbr = $this->getDB();
 215                 $user = $this->getUser();
 216                 $conds = array();
 217
 218                 // It makes no sense to hide both anons and logged-in users. When this occurs, try a guess on
 219                 // what the user meant and either show only bots or force anons to be shown.
 220                 $botsonly = false;
 221                 $hideanons = $opts['hideanons'];
 222                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
 223                         if ( $opts['hidebots'] ) {
 224                                 $hideanons = false;
 225                         } else {
 226                                 $botsonly = true;
 227                         }
 228                 }
 229
 230                 // Toggles
 231                 if ( $opts['hideminor'] ) {
 232                         $conds['rc_minor'] = 0;
 233                 }
 234                 if ( $opts['hidebots'] ) {
 235                         $conds['rc_bot'] = 0;
 236                 }
 237                 if ( $user->useRCPatrol() && $opts['hidepatrolled'] ) {
 238                         $conds['rc_patrolled'] = 0;
 239                 }
 240                 if ( $botsonly ) {
 241                         $conds['rc_bot'] = 1;
 242                 } else {
 243                         if ( $opts['hideliu'] ) {
 244                                 $conds[] = 'rc_user = 0';
 245                         }
 246                         if ( $hideanons ) {
 247                                 $conds[] = 'rc_user != 0';
 248                         }
 249                 }
 250                 if ( $opts['hidemyself'] ) {
 251                         if ( $user->getId() ) {
 252                                 $conds[] = 'rc_user != ' . $dbr->addQuotes( $user->getId() );
 253                         } else {
 254                                 $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $user->getName() );
 255                         }
 256                 }
 257                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' )
 258                         && $opts['hidecategorization'] === true
 259                 ) {
 260                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 261                 }
 262
 263                 // Namespace filtering
 264                 if ( $opts['namespace'] !== '' ) {
 265                         $selectedNS = $dbr->addQuotes( $opts['namespace'] );
 266                         $operator = $opts['invert'] ? '!=' : '=';
 267                         $boolean = $opts['invert'] ? 'AND' : 'OR';
 268
 269                         // Namespace association (bug 2429)
 270                         if ( !$opts['associated'] ) {
 271                                 $condition = "rc_namespace $operator $selectedNS";
 272                         } else {
 273                                 // Also add the associated namespace
 274                                 $associatedNS = $dbr->addQuotes(
 275                                         MWNamespace::getAssociated( $opts['namespace'] )
 276                                 );
 277                                 $condition = "(rc_namespace $operator $selectedNS "
 278                                         . $boolean
 279                                         . " rc_namespace $operator $associatedNS)";
 280                         }
 281
 282                         $conds[] = $condition;
 283                 }
 284
 285                 return $conds;
 286         }
 287
 288         /**
 289          * Process the query
 290          *
 291          * @param array $conds
 292          * @param FormOptions $opts
 293          * @return bool|ResultWrapper Result or false
 294          */
 295         public function doMainQuery( $conds, $opts ) {
 296                 $tables = array( 'recentchanges' );
 297                 $fields = RecentChange::selectFields();
 298                 $query_options = array();
 299                 $join_conds = array();
 300
 301                 ChangeTags::modifyDisplayQuery(
 302                         $tables,
 303                         $fields,
 304                         $conds,
 305                         $join_conds,
 306                         $query_options,
 307                         ''
 308                 );
 309
 310                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
 311                         $opts )
 312                 ) {
 313                         return false;
 314                 }
 315
 316                 $dbr = $this->getDB();
 317
 318                 return $dbr->select(
 319                         $tables,
 320                         $fields,
 321                         $conds,
 322                         __METHOD__,
 323                         $query_options,
 324                         $join_conds
 325                 );
 326         }
 327
 328         protected function runMainQueryHook( &$tables, &$fields, &$conds,
 329                 &$query_options, &$join_conds, $opts
 330         ) {
 331                 return Hooks::run(
 332                         'ChangesListSpecialPageQuery',
 333                         array( $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts )
 334                 );
 335         }
 336
 337         /**
 338          * Return a IDatabase object for reading
 339          *
 340          * @return IDatabase
 341          */
 342         protected function getDB() {
 343                 return wfGetDB( DB_SLAVE );
 344         }
 345
 346         /**
 347          * Send output to the OutputPage object, only called if not used feeds
 348          *
 349          * @param ResultWrapper $rows Database rows
 350          * @param FormOptions $opts
 351          */
 352         public function webOutput( $rows, $opts ) {
 353                 if ( !$this->including() ) {
 354                         $this->outputFeedLinks();
 355                         $this->doHeader( $opts, $rows->numRows() );
 356                 }
 357
 358                 $this->outputChangesList( $rows, $opts );
 359         }
 360
 361         /**
 362          * Output feed links.
 363          */
 364         public function outputFeedLinks() {
 365                 // nothing by default
 366         }
 367
 368         /**
 369          * Build and output the actual changes list.
 370          *
 371          * @param array $rows Database rows
 372          * @param FormOptions $opts
 373          */
 374         abstract public function outputChangesList( $rows, $opts );
 375
 376         /**
 377          * Set the text to be displayed above the changes
 378          *
 379          * @param FormOptions $opts
 380          * @param int $numRows Number of rows in the result to show after this header
 381          */
 382         public function doHeader( $opts, $numRows ) {
 383                 $this->setTopText( $opts );
 384
 385                 // @todo Lots of stuff should be done here.
 386
 387                 $this->setBottomText( $opts );
 388         }
 389
 390         /**
 391          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
 392          * or similar methods to print the text.
 393          *
 394          * @param FormOptions $opts
 395          */
 396         public function setTopText( FormOptions $opts ) {
 397                 // nothing by default
 398         }
 399
 400         /**
 401          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
 402          * or similar methods to print the text.
 403          *
 404          * @param FormOptions $opts
 405          */
 406         public function setBottomText( FormOptions $opts ) {
 407                 // nothing by default
 408         }
 409
 410         /**
 411          * Get options to be displayed in a form
 412          * @todo This should handle options returned by getDefaultOptions().
 413          * @todo Not called by anything, should be called by something… doHeader() maybe?
 414          *
 415          * @param FormOptions $opts
 416          * @return array
 417          */
 418         public function getExtraOptions( $opts ) {
 419                 return array();
 420         }
 421
 422         /**
 423          * Return the legend displayed within the fieldset
 424          *
 425          * @return string
 426          */
 427         public function makeLegend() {
 428                 $context = $this->getContext();
 429                 $user = $context->getUser();
 430                 # The legend showing what the letters and stuff mean
 431                 $legend = Html::openElement( 'dl' ) . "\n";
 432                 # Iterates through them and gets the messages for both letter and tooltip
 433                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
 434                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
 435                         unset( $legendItems['unpatrolled'] );
 436                 }
 437                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
 438                         $label = isset( $item['legend'] ) ? $item['legend'] : $item['title'];
 439                         $letter = $item['letter'];
 440                         $cssClass = isset( $item['class'] ) ? $item['class'] : $key;
 441
 442                         $legend .= Html::element( 'dt',
 443                                 array( 'class' => $cssClass ), $context->msg( $letter )->text()
 444                         ) . "\n" .
 445                         Html::rawElement( 'dd',
 446                                 array( 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ),
 447                                 $context->msg( $label )->parse()
 448                         ) . "\n";
 449                 }
 450                 # (+-123)
 451                 $legend .= Html::rawElement( 'dt',
 452                         array( 'class' => 'mw-plusminus-pos' ),
 453                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
 454                 ) . "\n";
 455                 $legend .= Html::element(
 456                         'dd',
 457                         array( 'class' => 'mw-changeslist-legend-plusminus' ),
 458                         $context->msg( 'recentchanges-label-plusminus' )->text()
 459                 ) . "\n";
 460                 $legend .= Html::closeElement( 'dl' ) . "\n";
 461
 462                 # Collapsibility
 463                 $legend =
 464                         '<div class="mw-changeslist-legend">' .
 465                                 $context->msg( 'recentchanges-legend-heading' )->parse() .
 466                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
 467                         '</div>';
 468
 469                 return $legend;
 470         }
 471
 472         /**
 473          * Add page-specific modules.
 474          */
 475         protected function addModules() {
 476                 $out = $this->getOutput();
 477                 // Styles and behavior for the legend box (see makeLegend())
 478                 $out->addModuleStyles( 'mediawiki.special.changeslist.legend' );
 479                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
 480         }
 481
 482         protected function getGroupName() {
 483                 return 'changes';
 484         }
 485 }