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 use MediaWiki\Logger\LoggerFactory;
  24 use Wikimedia\Rdbms\ResultWrapper;
  25 use Wikimedia\Rdbms\IDatabase;
  26
  27 /**
  28  * Special page which uses a ChangesList to show query results.
  29  * @todo Way too many public functions, most of them should be protected
  30  *
  31  * @ingroup SpecialPage
  32  */
  33 abstract class ChangesListSpecialPage extends SpecialPage {
  34         /** @var string */
  35         protected $rcSubpage;
  36
  37         /** @var FormOptions */
  38         protected $rcOptions;
  39
  40         /** @var array */
  41         protected $customFilters;
  42
  43         // Order of both groups and filters is significant; first is top-most priority,
  44         // descending from there.
  45         // 'showHideSuffix' is a shortcut to and avoid spelling out
  46         // details specific to subclasses here.
  47         /**
  48          * Definition information for the filters and their groups
  49          *
  50          * The value is $groupDefinition, a parameter to the ChangesListFilterGroup constructor.
  51          * However, priority is dynamically added for the core groups, to ease maintenance.
  52          *
  53          * Groups are displayed to the user in the structured UI.  However, if necessary,
  54          * all of the filters in a group can be configured to only display on the
  55          * unstuctured UI, in which case you don't need a group title.  This is done in
  56          * getFilterGroupDefinitionFromLegacyCustomFilters, for example.
  57          *
  58          * @var array $filterGroupDefinitions
  59          */
  60         private $filterGroupDefinitions;
  61
  62         // Same format as filterGroupDefinitions, but for a single group (reviewStatus)
  63         // that is registered conditionally.
  64         private $reviewStatusFilterGroupDefinition;
  65
  66         // Single filter registered conditionally
  67         private $hideCategorizationFilterDefinition;
  68
  69         /**
  70          * Filter groups, and their contained filters
  71          * This is an associative array (with group name as key) of ChangesListFilterGroup objects.
  72          *
  73          * @var array $filterGroups
  74          */
  75         protected $filterGroups = [];
  76
  77         public function __construct( $name, $restriction ) {
  78                 parent::__construct( $name, $restriction );
  79
  80                 $this->filterGroupDefinitions = [
  81                         [
  82                                 'name' => 'registration',
  83                                 'title' => 'rcfilters-filtergroup-registration',
  84                                 'class' => ChangesListBooleanFilterGroup::class,
  85                                 'filters' => [
  86                                         [
  87                                                 'name' => 'hideliu',
  88                                                 'label' => 'rcfilters-filter-registered-label',
  89                                                 'description' => 'rcfilters-filter-registered-description',
  90                                                 // rcshowhideliu-show, rcshowhideliu-hide,
  91                                                 // wlshowhideliu
  92                                                 'showHideSuffix' => 'showhideliu',
  93                                                 'default' => false,
  94                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
  95                                                         &$query_options, &$join_conds ) {
  96
  97                                                         $conds[] = 'rc_user = 0';
  98                                                 },
  99                                                 'cssClassSuffix' => 'liu',
 100                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 101                                                         return $rc->getAttribute( 'rc_user' );
 102                                                 },
 103
 104                                         ],
 105                                         [
 106                                                 'name' => 'hideanons',
 107                                                 'label' => 'rcfilters-filter-unregistered-label',
 108                                                 'description' => 'rcfilters-filter-unregistered-description',
 109                                                 // rcshowhideanons-show, rcshowhideanons-hide,
 110                                                 // wlshowhideanons
 111                                                 'showHideSuffix' => 'showhideanons',
 112                                                 'default' => false,
 113                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 114                                                         &$query_options, &$join_conds ) {
 115
 116                                                         $conds[] = 'rc_user != 0';
 117                                                 },
 118                                                 'cssClassSuffix' => 'anon',
 119                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 120                                                         return !$rc->getAttribute( 'rc_user' );
 121                                                 },
 122                                         ]
 123                                 ],
 124                         ],
 125
 126                         [
 127                                 'name' => 'userExpLevel',
 128                                 'title' => 'rcfilters-filtergroup-userExpLevel',
 129                                 'class' => ChangesListStringOptionsFilterGroup::class,
 130                                 // Excludes unregistered users
 131                                 'isFullCoverage' => false,
 132                                 'filters' => [
 133                                         [
 134                                                 'name' => 'newcomer',
 135                                                 'label' => 'rcfilters-filter-user-experience-level-newcomer-label',
 136                                                 'description' => 'rcfilters-filter-user-experience-level-newcomer-description',
 137                                                 'cssClassSuffix' => 'user-newcomer',
 138                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 139                                                         $performer = $rc->getPerformer();
 140                                                         return $performer && $performer->isLoggedIn() &&
 141                                                                 $performer->getExperienceLevel() === 'newcomer';
 142                                                 }
 143                                         ],
 144                                         [
 145                                                 'name' => 'learner',
 146                                                 'label' => 'rcfilters-filter-user-experience-level-learner-label',
 147                                                 'description' => 'rcfilters-filter-user-experience-level-learner-description',
 148                                                 'cssClassSuffix' => 'user-learner',
 149                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 150                                                         $performer = $rc->getPerformer();
 151                                                         return $performer && $performer->isLoggedIn() &&
 152                                                                 $performer->getExperienceLevel() === 'learner';
 153                                                 },
 154                                         ],
 155                                         [
 156                                                 'name' => 'experienced',
 157                                                 'label' => 'rcfilters-filter-user-experience-level-experienced-label',
 158                                                 'description' => 'rcfilters-filter-user-experience-level-experienced-description',
 159                                                 'cssClassSuffix' => 'user-experienced',
 160                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 161                                                         $performer = $rc->getPerformer();
 162                                                         return $performer && $performer->isLoggedIn() &&
 163                                                                 $performer->getExperienceLevel() === 'experienced';
 164                                                 },
 165                                         ]
 166                                 ],
 167                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 168                                 'queryCallable' => [ $this, 'filterOnUserExperienceLevel' ],
 169                         ],
 170
 171                         [
 172                                 'name' => 'authorship',
 173                                 'title' => 'rcfilters-filtergroup-authorship',
 174                                 'class' => ChangesListBooleanFilterGroup::class,
 175                                 'filters' => [
 176                                         [
 177                                                 'name' => 'hidemyself',
 178                                                 'label' => 'rcfilters-filter-editsbyself-label',
 179                                                 'description' => 'rcfilters-filter-editsbyself-description',
 180                                                 // rcshowhidemine-show, rcshowhidemine-hide,
 181                                                 // wlshowhidemine
 182                                                 'showHideSuffix' => 'showhidemine',
 183                                                 'default' => false,
 184                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 185                                                         &$query_options, &$join_conds ) {
 186
 187                                                         $user = $ctx->getUser();
 188                                                         $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $user->getName() );
 189                                                 },
 190                                                 'cssClassSuffix' => 'self',
 191                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 192                                                         return $ctx->getUser()->equals( $rc->getPerformer() );
 193                                                 },
 194                                         ],
 195                                         [
 196                                                 'name' => 'hidebyothers',
 197                                                 'label' => 'rcfilters-filter-editsbyother-label',
 198                                                 'description' => 'rcfilters-filter-editsbyother-description',
 199                                                 'default' => false,
 200                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 201                                                         &$query_options, &$join_conds ) {
 202
 203                                                         $user = $ctx->getUser();
 204                                                         $conds[] = 'rc_user_text = ' . $dbr->addQuotes( $user->getName() );
 205                                                 },
 206                                                 'cssClassSuffix' => 'others',
 207                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 208                                                         return !$ctx->getUser()->equals( $rc->getPerformer() );
 209                                                 },
 210                                         ]
 211                                 ]
 212                         ],
 213
 214                         [
 215                                 'name' => 'automated',
 216                                 'title' => 'rcfilters-filtergroup-automated',
 217                                 'class' => ChangesListBooleanFilterGroup::class,
 218                                 'filters' => [
 219                                         [
 220                                                 'name' => 'hidebots',
 221                                                 'label' => 'rcfilters-filter-bots-label',
 222                                                 'description' => 'rcfilters-filter-bots-description',
 223                                                 // rcshowhidebots-show, rcshowhidebots-hide,
 224                                                 // wlshowhidebots
 225                                                 'showHideSuffix' => 'showhidebots',
 226                                                 'default' => false,
 227                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 228                                                         &$query_options, &$join_conds ) {
 229
 230                                                         $conds[] = 'rc_bot = 0';
 231                                                 },
 232                                                 'cssClassSuffix' => 'bot',
 233                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 234                                                         return $rc->getAttribute( 'rc_bot' );
 235                                                 },
 236                                         ],
 237                                         [
 238                                                 'name' => 'hidehumans',
 239                                                 'label' => 'rcfilters-filter-humans-label',
 240                                                 'description' => 'rcfilters-filter-humans-description',
 241                                                 'default' => false,
 242                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 243                                                         &$query_options, &$join_conds ) {
 244
 245                                                         $conds[] = 'rc_bot = 1';
 246                                                 },
 247                                                 'cssClassSuffix' => 'human',
 248                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 249                                                         return !$rc->getAttribute( 'rc_bot' );
 250                                                 },
 251                                         ]
 252                                 ]
 253                         ],
 254
 255                         // reviewStatus (conditional)
 256
 257                         [
 258                                 'name' => 'lastRevision',
 259                                 'title' => 'rcfilters-filtergroup-lastRevision',
 260                                 'class' => ChangesListBooleanFilterGroup::class,
 261                                 'priority' => -7,
 262                                 'filters' => [
 263                                         [
 264                                                 'name' => 'hidelastrevision',
 265                                                 'label' => 'rcfilters-filter-lastrevision-label',
 266                                                 'description' => 'rcfilters-filter-lastrevision-description',
 267                                                 'default' => false,
 268                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 269                                                         &$query_options, &$join_conds ) {
 270                                                         $conds[] = 'rc_this_oldid <> page_latest';
 271                                                 },
 272                                                 'cssClassSuffix' => 'last',
 273                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 274                                                         return $rc->getAttribute( 'rc_this_oldid' ) === $rc->getAttribute( 'page_latest' );
 275                                                 }
 276                                         ],
 277                                         [
 278                                                 'name' => 'hidepreviousrevisions',
 279                                                 'label' => 'rcfilters-filter-previousrevision-label',
 280                                                 'description' => 'rcfilters-filter-previousrevision-description',
 281                                                 'default' => false,
 282                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 283                                                         &$query_options, &$join_conds ) {
 284                                                         $conds[] = 'rc_this_oldid = page_latest';
 285                                                 },
 286                                                 'cssClassSuffix' => 'previous',
 287                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 288                                                         return $rc->getAttribute( 'rc_this_oldid' ) !== $rc->getAttribute( 'page_latest' );
 289                                                 }
 290                                         ]
 291                                 ]
 292                         ],
 293
 294                         [
 295                                 'name' => 'significance',
 296                                 'title' => 'rcfilters-filtergroup-significance',
 297                                 'class' => ChangesListBooleanFilterGroup::class,
 298                                 'priority' => -6,
 299                                 'filters' => [
 300                                         [
 301                                                 'name' => 'hideminor',
 302                                                 'label' => 'rcfilters-filter-minor-label',
 303                                                 'description' => 'rcfilters-filter-minor-description',
 304                                                 // rcshowhideminor-show, rcshowhideminor-hide,
 305                                                 // wlshowhideminor
 306                                                 'showHideSuffix' => 'showhideminor',
 307                                                 'default' => false,
 308                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 309                                                         &$query_options, &$join_conds ) {
 310
 311                                                         $conds[] = 'rc_minor = 0';
 312                                                 },
 313                                                 'cssClassSuffix' => 'minor',
 314                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 315                                                         return $rc->getAttribute( 'rc_minor' );
 316                                                 }
 317                                         ],
 318                                         [
 319                                                 'name' => 'hidemajor',
 320                                                 'label' => 'rcfilters-filter-major-label',
 321                                                 'description' => 'rcfilters-filter-major-description',
 322                                                 'default' => false,
 323                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 324                                                         &$query_options, &$join_conds ) {
 325
 326                                                         $conds[] = 'rc_minor = 1';
 327                                                 },
 328                                                 'cssClassSuffix' => 'major',
 329                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 330                                                         return !$rc->getAttribute( 'rc_minor' );
 331                                                 }
 332                                         ]
 333                                 ]
 334                         ],
 335
 336                         // With extensions, there can be change types that will not be hidden by any of these.
 337                         [
 338                                 'name' => 'changeType',
 339                                 'title' => 'rcfilters-filtergroup-changetype',
 340                                 'class' => ChangesListBooleanFilterGroup::class,
 341                                 'filters' => [
 342                                         [
 343                                                 'name' => 'hidepageedits',
 344                                                 'label' => 'rcfilters-filter-pageedits-label',
 345                                                 'description' => 'rcfilters-filter-pageedits-description',
 346                                                 'default' => false,
 347                                                 'priority' => -2,
 348                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 349                                                         &$query_options, &$join_conds ) {
 350
 351                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_EDIT );
 352                                                 },
 353                                                 'cssClassSuffix' => 'src-mw-edit',
 354                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 355                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_EDIT;
 356                                                 },
 357                                         ],
 358                                         [
 359                                                 'name' => 'hidenewpages',
 360                                                 'label' => 'rcfilters-filter-newpages-label',
 361                                                 'description' => 'rcfilters-filter-newpages-description',
 362                                                 'default' => false,
 363                                                 'priority' => -3,
 364                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 365                                                         &$query_options, &$join_conds ) {
 366
 367                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_NEW );
 368                                                 },
 369                                                 'cssClassSuffix' => 'src-mw-new',
 370                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 371                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_NEW;
 372                                                 },
 373                                         ],
 374
 375                                         // hidecategorization
 376
 377                                         [
 378                                                 'name' => 'hidelog',
 379                                                 'label' => 'rcfilters-filter-logactions-label',
 380                                                 'description' => 'rcfilters-filter-logactions-description',
 381                                                 'default' => false,
 382                                                 'priority' => -5,
 383                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 384                                                         &$query_options, &$join_conds ) {
 385
 386                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_LOG );
 387                                                 },
 388                                                 'cssClassSuffix' => 'src-mw-log',
 389                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 390                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_LOG;
 391                                                 }
 392                                         ],
 393                                 ],
 394                         ],
 395                 ];
 396
 397                 $this->reviewStatusFilterGroupDefinition = [
 398                         [
 399                                 'name' => 'reviewStatus',
 400                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 401                                 'class' => ChangesListBooleanFilterGroup::class,
 402                                 'priority' => -5,
 403                                 'filters' => [
 404                                         [
 405                                                 'name' => 'hidepatrolled',
 406                                                 'label' => 'rcfilters-filter-patrolled-label',
 407                                                 'description' => 'rcfilters-filter-patrolled-description',
 408                                                 // rcshowhidepatr-show, rcshowhidepatr-hide
 409                                                 // wlshowhidepatr
 410                                                 'showHideSuffix' => 'showhidepatr',
 411                                                 'default' => false,
 412                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 413                                                         &$query_options, &$join_conds ) {
 414
 415                                                         $conds[] = 'rc_patrolled = 0';
 416                                                 },
 417                                                 'cssClassSuffix' => 'patrolled',
 418                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 419                                                         return $rc->getAttribute( 'rc_patrolled' );
 420                                                 },
 421                                         ],
 422                                         [
 423                                                 'name' => 'hideunpatrolled',
 424                                                 'label' => 'rcfilters-filter-unpatrolled-label',
 425                                                 'description' => 'rcfilters-filter-unpatrolled-description',
 426                                                 'default' => false,
 427                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 428                                                         &$query_options, &$join_conds ) {
 429
 430                                                         $conds[] = 'rc_patrolled = 1';
 431                                                 },
 432                                                 'cssClassSuffix' => 'unpatrolled',
 433                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 434                                                         return !$rc->getAttribute( 'rc_patrolled' );
 435                                                 },
 436                                         ],
 437                                 ],
 438                         ]
 439                 ];
 440
 441                 $this->hideCategorizationFilterDefinition = [
 442                         'name' => 'hidecategorization',
 443                         'label' => 'rcfilters-filter-categorization-label',
 444                         'description' => 'rcfilters-filter-categorization-description',
 445                         // rcshowhidecategorization-show, rcshowhidecategorization-hide.
 446                         // wlshowhidecategorization
 447                         'showHideSuffix' => 'showhidecategorization',
 448                         'default' => false,
 449                         'priority' => -4,
 450                         'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 451                                 &$query_options, &$join_conds ) {
 452
 453                                 $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 454                         },
 455                         'cssClassSuffix' => 'src-mw-categorize',
 456                         'isRowApplicableCallable' => function ( $ctx, $rc ) {
 457                                 return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_CATEGORIZE;
 458                         },
 459                 ];
 460         }
 461
 462         /**
 463          * Check if filters are in conflict and guaranteed to return no results.
 464          *
 465          * @return bool
 466          */
 467         protected function areFiltersInConflict() {
 468                 $opts = $this->getOptions();
 469                 /** @var ChangesListFilterGroup $group */
 470                 foreach ( $this->getFilterGroups() as $group ) {
 471
 472                         if ( $group->getConflictingGroups() ) {
 473                                 wfLogWarning(
 474                                         $group->getName() .
 475                                         " specifies conflicts with other groups but these are not supported yet."
 476                                 );
 477                         }
 478
 479                         /** @var ChangesListFilter $conflictingFilter */
 480                         foreach ( $group->getConflictingFilters() as $conflictingFilter ) {
 481                                 if ( $conflictingFilter->activelyInConflictWithGroup( $group, $opts ) ) {
 482                                         return true;
 483                                 }
 484                         }
 485
 486                         /** @var ChangesListFilter $filter */
 487                         foreach ( $group->getFilters() as $filter ) {
 488
 489                                 /** @var ChangesListFilter $conflictingFilter */
 490                                 foreach ( $filter->getConflictingFilters() as $conflictingFilter ) {
 491                                         if (
 492                                                 $conflictingFilter->activelyInConflictWithFilter( $filter, $opts ) &&
 493                                                 $filter->activelyInConflictWithFilter( $conflictingFilter, $opts )
 494                                         ) {
 495                                                 return true;
 496                                         }
 497                                 }
 498
 499                         }
 500
 501                 }
 502
 503                 return false;
 504         }
 505
 506         /**
 507          * Main execution point
 508          *
 509          * @param string $subpage
 510          */
 511         public function execute( $subpage ) {
 512                 $this->rcSubpage = $subpage;
 513
 514                 $this->setHeaders();
 515                 $this->outputHeader();
 516                 $this->addModules();
 517
 518                 $rows = $this->getRows();
 519                 $opts = $this->getOptions();
 520                 if ( $rows === false ) {
 521                         if ( !$this->including() ) {
 522                                 $this->doHeader( $opts, 0 );
 523                                 $this->outputNoResults();
 524                                 $this->getOutput()->setStatusCode( 404 );
 525                         }
 526
 527                         return;
 528                 }
 529
 530                 $batch = new LinkBatch;
 531                 foreach ( $rows as $row ) {
 532                         $batch->add( NS_USER, $row->rc_user_text );
 533                         $batch->add( NS_USER_TALK, $row->rc_user_text );
 534                         $batch->add( $row->rc_namespace, $row->rc_title );
 535                         if ( $row->rc_source === RecentChange::SRC_LOG ) {
 536                                 $formatter = LogFormatter::newFromRow( $row );
 537                                 foreach ( $formatter->getPreloadTitles() as $title ) {
 538                                         $batch->addObj( $title );
 539                                 }
 540                         }
 541                 }
 542                 $batch->execute();
 543                 $this->webOutput( $rows, $opts );
 544
 545                 $rows->free();
 546
 547                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 548                         // Clean up any bad page entries for titles showing up in RC
 549                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 550                                 $this->getDB(),
 551                                 LoggerFactory::getInstance( 'objectcache' )
 552                         ) );
 553                 }
 554         }
 555
 556         /**
 557          * Add the "no results" message to the output
 558          */
 559         protected function outputNoResults() {
 560                 $this->getOutput()->addHTML(
 561                         '<div class="mw-changeslist-empty">' .
 562                         $this->msg( 'recentchanges-noresult' )->parse() .
 563                         '</div>'
 564                 );
 565         }
 566
 567         /**
 568          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 569          *
 570          * @return bool|ResultWrapper Result or false
 571          */
 572         public function getRows() {
 573                 $opts = $this->getOptions();
 574
 575                 $tables = [];
 576                 $fields = [];
 577                 $conds = [];
 578                 $query_options = [];
 579                 $join_conds = [];
 580                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 581
 582                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 583         }
 584
 585         /**
 586          * Get the current FormOptions for this request
 587          *
 588          * @return FormOptions
 589          */
 590         public function getOptions() {
 591                 if ( $this->rcOptions === null ) {
 592                         $this->rcOptions = $this->setup( $this->rcSubpage );
 593                 }
 594
 595                 return $this->rcOptions;
 596         }
 597
 598         /**
 599          * Register all filters and their groups (including those from hooks), plus handle
 600          * conflicts and defaults.
 601          *
 602          * You might want to customize these in the same method, in subclasses.  You can
 603          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 604          * filter, then make necessary modfications to the filter or group (e.g. with
 605          * setDefault).
 606          */
 607         protected function registerFilters() {
 608                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 609
 610                 // Make sure this is not being transcluded (we don't want to show this
 611                 // information to all users just because the user that saves the edit can
 612                 // patrol)
 613                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 614                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 615                 }
 616
 617                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 618
 619                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 620                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 621                                 $this->hideCategorizationFilterDefinition
 622                         );
 623
 624                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 625
 626                         $hideCategorization = new ChangesListBooleanFilter(
 627                                 $transformedHideCategorizationDef
 628                         );
 629                 }
 630
 631                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 632
 633                 $unstructuredGroupDefinition =
 634                         $this->getFilterGroupDefinitionFromLegacyCustomFilters(
 635                                 $this->getCustomFilters()
 636                         );
 637                 $this->registerFiltersFromDefinitions( [ $unstructuredGroupDefinition ] );
 638
 639                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
 640
 641                 $registration = $this->getFilterGroup( 'registration' );
 642                 $anons = $registration->getFilter( 'hideanons' );
 643
 644                 // This means there is a conflict between any item in user experience level
 645                 // being checked and only anons being *shown* (hideliu=1&hideanons=0 in the
 646                 // URL, or equivalent).
 647                 $userExperienceLevel->conflictsWith(
 648                         $anons,
 649                         'rcfilters-filtergroup-user-experience-level-conflicts-unregistered-global',
 650                         'rcfilters-filtergroup-user-experience-level-conflicts-unregistered',
 651                         'rcfilters-filter-unregistered-conflicts-user-experience-level'
 652                 );
 653
 654                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
 655                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
 656                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
 657
 658                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
 659                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
 660
 661                 // categoryFilter is conditional; see registerFilters
 662                 if ( $categoryFilter !== null ) {
 663                         $hideMinorFilter->conflictsWith(
 664                                 $categoryFilter,
 665                                 'rcfilters-hideminor-conflicts-typeofchange-global',
 666                                 'rcfilters-hideminor-conflicts-typeofchange',
 667                                 'rcfilters-typeofchange-conflicts-hideminor'
 668                         );
 669                 }
 670                 $hideMinorFilter->conflictsWith(
 671                         $logactionsFilter,
 672                         'rcfilters-hideminor-conflicts-typeofchange-global',
 673                         'rcfilters-hideminor-conflicts-typeofchange',
 674                         'rcfilters-typeofchange-conflicts-hideminor'
 675                 );
 676                 $hideMinorFilter->conflictsWith(
 677                         $pagecreationFilter,
 678                         'rcfilters-hideminor-conflicts-typeofchange-global',
 679                         'rcfilters-hideminor-conflicts-typeofchange',
 680                         'rcfilters-typeofchange-conflicts-hideminor'
 681                 );
 682         }
 683
 684         /**
 685          * Transforms filter definition to prepare it for constructor.
 686          *
 687          * See overrides of this method as well.
 688          *
 689          * @param array $filterDefinition Original filter definition
 690          *
 691          * @return array Transformed definition
 692          */
 693         protected function transformFilterDefinition( array $filterDefinition ) {
 694                 return $filterDefinition;
 695         }
 696
 697         /**
 698          * Register filters from a definition object
 699          *
 700          * Array specifying groups and their filters; see Filter and
 701          * ChangesListFilterGroup constructors.
 702          *
 703          * There is light processing to simplify core maintenance.
 704          */
 705         protected function registerFiltersFromDefinitions( array $definition ) {
 706                 $autoFillPriority = -1;
 707                 foreach ( $definition as $groupDefinition ) {
 708                         if ( !isset( $groupDefinition['priority'] ) ) {
 709                                 $groupDefinition['priority'] = $autoFillPriority;
 710                         } else {
 711                                 // If it's explicitly specified, start over the auto-fill
 712                                 $autoFillPriority = $groupDefinition['priority'];
 713                         }
 714
 715                         $autoFillPriority--;
 716
 717                         $className = $groupDefinition['class'];
 718                         unset( $groupDefinition['class'] );
 719
 720                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
 721                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
 722                         }
 723
 724                         $this->registerFilterGroup( new $className( $groupDefinition ) );
 725                 }
 726         }
 727
 728         /**
 729          * Get filter group definition from legacy custom filters
 730          *
 731          * @param array Custom filters from legacy hooks
 732          * @return array Group definition
 733          */
 734         protected function getFilterGroupDefinitionFromLegacyCustomFilters( $customFilters ) {
 735                 // Special internal unstructured group
 736                 $unstructuredGroupDefinition = [
 737                         'name' => 'unstructured',
 738                         'class' => ChangesListBooleanFilterGroup::class,
 739                         'priority' => -1, // Won't display in structured
 740                         'filters' => [],
 741                 ];
 742
 743                 foreach ( $customFilters as $name => $params ) {
 744                         $unstructuredGroupDefinition['filters'][] = [
 745                                 'name' => $name,
 746                                 'showHide' => $params['msg'],
 747                                 'default' => $params['default'],
 748                         ];
 749                 }
 750
 751                 return $unstructuredGroupDefinition;
 752         }
 753
 754         /**
 755          * Register all the filters, including legacy hook-driven ones.
 756          * Then create a FormOptions object with options as specified by the user
 757          *
 758          * @param array $parameters
 759          *
 760          * @return FormOptions
 761          */
 762         public function setup( $parameters ) {
 763                 $this->registerFilters();
 764
 765                 $opts = $this->getDefaultOptions();
 766
 767                 $opts = $this->fetchOptionsFromRequest( $opts );
 768
 769                 // Give precedence to subpage syntax
 770                 if ( $parameters !== null ) {
 771                         $this->parseParameters( $parameters, $opts );
 772                 }
 773
 774                 $this->validateOptions( $opts );
 775
 776                 return $opts;
 777         }
 778
 779         /**
 780          * Get a FormOptions object containing the default options. By default, returns
 781          * some basic options.  The filters listed explicitly here are overriden in this
 782          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
 783          * and more) are structured.  Structured filters are overriden in registerFilters.
 784          * not here.
 785          *
 786          * @return FormOptions
 787          */
 788         public function getDefaultOptions() {
 789                 $config = $this->getConfig();
 790                 $opts = new FormOptions();
 791                 $structuredUI = $this->getUser()->getOption( 'rcenhancedfilters' );
 792
 793                 // Add all filters
 794                 foreach ( $this->filterGroups as $filterGroup ) {
 795                         // URL parameters can be per-group, like 'userExpLevel',
 796                         // or per-filter, like 'hideminor'.
 797                         if ( $filterGroup->isPerGroupRequestParameter() ) {
 798                                 $opts->add( $filterGroup->getName(), $filterGroup->getDefault() );
 799                         } else {
 800                                 foreach ( $filterGroup->getFilters() as $filter ) {
 801                                         $opts->add( $filter->getName(), $filter->getDefault( $structuredUI ) );
 802                                 }
 803                         }
 804                 }
 805
 806                 $opts->add( 'namespace', '', FormOptions::INTNULL );
 807                 $opts->add( 'invert', false );
 808                 $opts->add( 'associated', false );
 809
 810                 return $opts;
 811         }
 812
 813         /**
 814          * Register a structured changes list filter group
 815          *
 816          * @param ChangesListFilterGroup $group
 817          */
 818         public function registerFilterGroup( ChangesListFilterGroup $group ) {
 819                 $groupName = $group->getName();
 820
 821                 $this->filterGroups[$groupName] = $group;
 822         }
 823
 824         /**
 825          * Gets the currently registered filters groups
 826          *
 827          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
 828          */
 829         protected function getFilterGroups() {
 830                 return $this->filterGroups;
 831         }
 832
 833         /**
 834          * Gets a specified ChangesListFilterGroup by name
 835          *
 836          * @param string $groupName Name of group
 837          *
 838          * @return ChangesListFilterGroup|null Group, or null if not registered
 839          */
 840         public function getFilterGroup( $groupName ) {
 841                 return isset( $this->filterGroups[$groupName] ) ?
 842                         $this->filterGroups[$groupName] :
 843                         null;
 844         }
 845
 846         // Currently, this intentionally only includes filters that display
 847         // in the structured UI.  This can be changed easily, though, if we want
 848         // to include data on filters that use the unstructured UI.  messageKeys is a
 849         // special top-level value, with the value being an array of the message keys to
 850         // send to the client.
 851         /**
 852          * Gets structured filter information needed by JS
 853          *
 854          * @return array Associative array
 855          * * array $return['groups'] Group data
 856          * * array $return['messageKeys'] Array of message keys
 857          */
 858         public function getStructuredFilterJsData() {
 859                 $output = [
 860                         'groups' => [],
 861                         'messageKeys' => [],
 862                 ];
 863
 864                 $context = $this->getContext();
 865
 866                 usort( $this->filterGroups, function ( $a, $b ) {
 867                         return $b->getPriority() - $a->getPriority();
 868                 } );
 869
 870                 foreach ( $this->filterGroups as $groupName => $group ) {
 871                         $groupOutput = $group->getJsData( $this );
 872                         if ( $groupOutput !== null ) {
 873                                 $output['messageKeys'] = array_merge(
 874                                         $output['messageKeys'],
 875                                         $groupOutput['messageKeys']
 876                                 );
 877
 878                                 unset( $groupOutput['messageKeys'] );
 879                                 $output['groups'][] = $groupOutput;
 880                         }
 881                 }
 882
 883                 return $output;
 884         }
 885
 886         /**
 887          * Get custom show/hide filters using deprecated ChangesListSpecialPageFilters
 888          * hook.
 889          *
 890          * @return array Map of filter URL param names to properties (msg/default)
 891          */
 892         protected function getCustomFilters() {
 893                 if ( $this->customFilters === null ) {
 894                         $this->customFilters = [];
 895                         Hooks::run( 'ChangesListSpecialPageFilters', [ $this, &$this->customFilters ], '1.29' );
 896                 }
 897
 898                 return $this->customFilters;
 899         }
 900
 901         /**
 902          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
 903          *
 904          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
 905          *
 906          * @param FormOptions $opts
 907          * @return FormOptions
 908          */
 909         protected function fetchOptionsFromRequest( $opts ) {
 910                 $opts->fetchValuesFromRequest( $this->getRequest() );
 911
 912                 return $opts;
 913         }
 914
 915         /**
 916          * Process $par and put options found in $opts. Used when including the page.
 917          *
 918          * @param string $par
 919          * @param FormOptions $opts
 920          */
 921         public function parseParameters( $par, FormOptions $opts ) {
 922                 $stringParameterNameSet = [];
 923                 $hideParameterNameSet = [];
 924
 925                 // URL parameters can be per-group, like 'userExpLevel',
 926                 // or per-filter, like 'hideminor'.
 927
 928                 foreach ( $this->filterGroups as $filterGroup ) {
 929                         if ( $filterGroup->isPerGroupRequestParameter() ) {
 930                                 $stringParameterNameSet[$filterGroup->getName()] = true;
 931                         } elseif ( $filterGroup->getType() === ChangesListBooleanFilterGroup::TYPE ) {
 932                                 foreach ( $filterGroup->getFilters() as $filter ) {
 933                                         $hideParameterNameSet[$filter->getName()] = true;
 934                                 }
 935                         }
 936                 }
 937
 938                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
 939                 foreach ( $bits as $bit ) {
 940                         $m = [];
 941                         if ( isset( $hideParameterNameSet[$bit] ) ) {
 942                                 // hidefoo => hidefoo=true
 943                                 $opts[$bit] = true;
 944                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
 945                                 // foo => hidefoo=false
 946                                 $opts["hide$bit"] = false;
 947                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
 948                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
 949                                         $opts[$m[1]] = $m[2];
 950                                 }
 951                         }
 952                 }
 953         }
 954
 955         /**
 956          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
 957          *
 958          * @param FormOptions $opts
 959          */
 960         public function validateOptions( FormOptions $opts ) {
 961                 // nothing by default
 962         }
 963
 964         /**
 965          * Sets appropriate tables, fields, conditions, etc. depending on which filters
 966          * the user requested.
 967          *
 968          * @param array &$tables Array of tables; see IDatabase::select $table
 969          * @param array &$fields Array of fields; see IDatabase::select $vars
 970          * @param array &$conds Array of conditions; see IDatabase::select $conds
 971          * @param array &$query_options Array of query options; see IDatabase::select $options
 972          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
 973          * @param FormOptions $opts
 974          */
 975         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
 976                 &$join_conds, FormOptions $opts ) {
 977
 978                 $dbr = $this->getDB();
 979                 $user = $this->getUser();
 980
 981                 $context = $this->getContext();
 982                 foreach ( $this->filterGroups as $filterGroup ) {
 983                         // URL parameters can be per-group, like 'userExpLevel',
 984                         // or per-filter, like 'hideminor'.
 985                         if ( $filterGroup->isPerGroupRequestParameter() ) {
 986                                 $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
 987                                         $query_options, $join_conds, $opts[$filterGroup->getName()] );
 988                         } else {
 989                                 foreach ( $filterGroup->getFilters() as $filter ) {
 990                                         if ( $opts[$filter->getName()] ) {
 991                                                 $filter->modifyQuery( $dbr, $this, $tables, $fields, $conds,
 992                                                         $query_options, $join_conds );
 993                                         }
 994                                 }
 995                         }
 996                 }
 997
 998                 // Namespace filtering
 999                 if ( $opts['namespace'] !== '' ) {
1000                         $selectedNS = $dbr->addQuotes( $opts['namespace'] );
1001                         $operator = $opts['invert'] ? '!=' : '=';
1002                         $boolean = $opts['invert'] ? 'AND' : 'OR';
1003
1004                         // Namespace association (T4429)
1005                         if ( !$opts['associated'] ) {
1006                                 $condition = "rc_namespace $operator $selectedNS";
1007                         } else {
1008                                 // Also add the associated namespace
1009                                 $associatedNS = $dbr->addQuotes(
1010                                         MWNamespace::getAssociated( $opts['namespace'] )
1011                                 );
1012                                 $condition = "(rc_namespace $operator $selectedNS "
1013                                         . $boolean
1014                                         . " rc_namespace $operator $associatedNS)";
1015                         }
1016
1017                         $conds[] = $condition;
1018                 }
1019         }
1020
1021         /**
1022          * Process the query
1023          *
1024          * @param array $tables Array of tables; see IDatabase::select $table
1025          * @param array $fields Array of fields; see IDatabase::select $vars
1026          * @param array $conds Array of conditions; see IDatabase::select $conds
1027          * @param array $query_options Array of query options; see IDatabase::select $options
1028          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1029          * @param FormOptions $opts
1030          * @return bool|ResultWrapper Result or false
1031          */
1032         protected function doMainQuery( $tables, $fields, $conds,
1033                 $query_options, $join_conds, FormOptions $opts ) {
1034
1035                 $tables[] = 'recentchanges';
1036                 $fields = array_merge( RecentChange::selectFields(), $fields );
1037
1038                 ChangeTags::modifyDisplayQuery(
1039                         $tables,
1040                         $fields,
1041                         $conds,
1042                         $join_conds,
1043                         $query_options,
1044                         ''
1045                 );
1046
1047                 // It makes no sense to hide both anons and logged-in users. When this occurs, try a guess on
1048                 // what the user meant and either show only bots or force anons to be shown.
1049
1050                 // -------
1051
1052                 // XXX: We're no longer doing this handling.  To preserve back-compat, we need to complete
1053                 // T151873 (particularly the hideanons/hideliu/hidebots/hidehumans part) in conjunction
1054                 // with merging this.
1055
1056                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1057                         $opts )
1058                 ) {
1059                         return false;
1060                 }
1061
1062                 $dbr = $this->getDB();
1063
1064                 return $dbr->select(
1065                         $tables,
1066                         $fields,
1067                         $conds,
1068                         __METHOD__,
1069                         $query_options,
1070                         $join_conds
1071                 );
1072         }
1073
1074         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1075                 &$query_options, &$join_conds, $opts
1076         ) {
1077                 return Hooks::run(
1078                         'ChangesListSpecialPageQuery',
1079                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1080                 );
1081         }
1082
1083         /**
1084          * Return a IDatabase object for reading
1085          *
1086          * @return IDatabase
1087          */
1088         protected function getDB() {
1089                 return wfGetDB( DB_REPLICA );
1090         }
1091
1092         /**
1093          * Send output to the OutputPage object, only called if not used feeds
1094          *
1095          * @param ResultWrapper $rows Database rows
1096          * @param FormOptions $opts
1097          */
1098         public function webOutput( $rows, $opts ) {
1099                 if ( !$this->including() ) {
1100                         $this->outputFeedLinks();
1101                         $this->doHeader( $opts, $rows->numRows() );
1102                 }
1103
1104                 $this->outputChangesList( $rows, $opts );
1105         }
1106
1107         /**
1108          * Output feed links.
1109          */
1110         public function outputFeedLinks() {
1111                 // nothing by default
1112         }
1113
1114         /**
1115          * Build and output the actual changes list.
1116          *
1117          * @param ResultWrapper $rows Database rows
1118          * @param FormOptions $opts
1119          */
1120         abstract public function outputChangesList( $rows, $opts );
1121
1122         /**
1123          * Set the text to be displayed above the changes
1124          *
1125          * @param FormOptions $opts
1126          * @param int $numRows Number of rows in the result to show after this header
1127          */
1128         public function doHeader( $opts, $numRows ) {
1129                 $this->setTopText( $opts );
1130
1131                 // @todo Lots of stuff should be done here.
1132
1133                 $this->setBottomText( $opts );
1134         }
1135
1136         /**
1137          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
1138          * or similar methods to print the text.
1139          *
1140          * @param FormOptions $opts
1141          */
1142         public function setTopText( FormOptions $opts ) {
1143                 // nothing by default
1144         }
1145
1146         /**
1147          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
1148          * or similar methods to print the text.
1149          *
1150          * @param FormOptions $opts
1151          */
1152         public function setBottomText( FormOptions $opts ) {
1153                 // nothing by default
1154         }
1155
1156         /**
1157          * Get options to be displayed in a form
1158          * @todo This should handle options returned by getDefaultOptions().
1159          * @todo Not called by anything in this class (but is in subclasses), should be
1160          * called by something… doHeader() maybe?
1161          *
1162          * @param FormOptions $opts
1163          * @return array
1164          */
1165         public function getExtraOptions( $opts ) {
1166                 return [];
1167         }
1168
1169         /**
1170          * Return the legend displayed within the fieldset
1171          *
1172          * @return string
1173          */
1174         public function makeLegend() {
1175                 $context = $this->getContext();
1176                 $user = $context->getUser();
1177                 # The legend showing what the letters and stuff mean
1178                 $legend = Html::openElement( 'dl' ) . "\n";
1179                 # Iterates through them and gets the messages for both letter and tooltip
1180                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1181                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1182                         unset( $legendItems['unpatrolled'] );
1183                 }
1184                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1185                         $label = isset( $item['legend'] ) ? $item['legend'] : $item['title'];
1186                         $letter = $item['letter'];
1187                         $cssClass = isset( $item['class'] ) ? $item['class'] : $key;
1188
1189                         $legend .= Html::element( 'dt',
1190                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1191                         ) . "\n" .
1192                         Html::rawElement( 'dd',
1193                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1194                                 $context->msg( $label )->parse()
1195                         ) . "\n";
1196                 }
1197                 # (+-123)
1198                 $legend .= Html::rawElement( 'dt',
1199                         [ 'class' => 'mw-plusminus-pos' ],
1200                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1201                 ) . "\n";
1202                 $legend .= Html::element(
1203                         'dd',
1204                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1205                         $context->msg( 'recentchanges-label-plusminus' )->text()
1206                 ) . "\n";
1207                 $legend .= Html::closeElement( 'dl' ) . "\n";
1208
1209                 # Collapsibility
1210                 $legend =
1211                         '<div class="mw-changeslist-legend">' .
1212                                 $context->msg( 'recentchanges-legend-heading' )->parse() .
1213                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1214                         '</div>';
1215
1216                 return $legend;
1217         }
1218
1219         /**
1220          * Add page-specific modules.
1221          */
1222         protected function addModules() {
1223                 $out = $this->getOutput();
1224                 // Styles and behavior for the legend box (see makeLegend())
1225                 $out->addModuleStyles( [
1226                         'mediawiki.special.changeslist.legend',
1227                         'mediawiki.special.changeslist',
1228                 ] );
1229                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1230         }
1231
1232         protected function getGroupName() {
1233                 return 'changes';
1234         }
1235
1236         /**
1237          * Filter on users' experience levels; this will not be called if nothing is
1238          * selected.
1239          *
1240          * @param string $specialPageClassName Class name of current special page
1241          * @param IContextSource $context Context, for e.g. user
1242          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1243          * @param array &$tables Array of tables; see IDatabase::select $table
1244          * @param array &$fields Array of fields; see IDatabase::select $vars
1245          * @param array &$conds Array of conditions; see IDatabase::select $conds
1246          * @param array &$query_options Array of query options; see IDatabase::select $options
1247          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1248          * @param array $selectedExpLevels The allowed active values, sorted
1249          */
1250         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1251                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels ) {
1252
1253                 global $wgLearnerEdits,
1254                         $wgExperiencedUserEdits,
1255                         $wgLearnerMemberSince,
1256                         $wgExperiencedUserMemberSince;
1257
1258                 $LEVEL_COUNT = 3;
1259
1260                 // If all levels are selected, all logged-in users are included (but no
1261                 // anons), so we can short-circuit.
1262                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1263                         $conds[] = 'rc_user != 0';
1264                         return;
1265                 }
1266
1267                 $tables[] = 'user';
1268                 $join_conds['user'] = [ 'LEFT JOIN', 'rc_user = user_id' ];
1269
1270                 $now = time();
1271                 $secondsPerDay = 86400;
1272                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1273                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1274
1275                 $aboveNewcomer = $dbr->makeList(
1276                         [
1277                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1278                                 'user_registration <= ' . $dbr->timestamp( $learnerCutoff ),
1279                         ],
1280                         IDatabase::LIST_AND
1281                 );
1282
1283                 $aboveLearner = $dbr->makeList(
1284                         [
1285                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1286                                 'user_registration <= ' . $dbr->timestamp( $experiencedUserCutoff ),
1287                         ],
1288                         IDatabase::LIST_AND
1289                 );
1290
1291                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1292                         $conds[] = "NOT ( $aboveNewcomer )";
1293                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1294                         $conds[] = $dbr->makeList(
1295                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1296                                 IDatabase::LIST_AND
1297                         );
1298                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1299                         $conds[] = $aboveLearner;
1300                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1301                         $conds[] = "NOT ( $aboveLearner )";
1302                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1303                         $conds[] = $dbr->makeList(
1304                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1305                                 IDatabase::LIST_OR
1306                         );
1307                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1308                         $conds[] = $aboveNewcomer;
1309                 }
1310         }
1311 }