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\DBQueryTimeoutError;
  25 use Wikimedia\Rdbms\IResultWrapper;
  26 use Wikimedia\Rdbms\FakeResultWrapper;
  27 use Wikimedia\Rdbms\IDatabase;
  28
  29 /**
  30  * Special page which uses a ChangesList to show query results.
  31  * @todo Way too many public functions, most of them should be protected
  32  *
  33  * @ingroup SpecialPage
  34  */
  35 abstract class ChangesListSpecialPage extends SpecialPage {
  36         /**
  37          * Maximum length of a tag description in UTF-8 characters.
  38          * Longer descriptions will be truncated.
  39          */
  40         const TAG_DESC_CHARACTER_LIMIT = 120;
  41
  42         /**
  43          * Preference name for saved queries. Subclasses that use saved queries should override this.
  44          * @var string
  45          */
  46         protected static $savedQueriesPreferenceName;
  47
  48         /**
  49          * Preference name for 'days'. Subclasses should override this.
  50          * @var string
  51          */
  52         protected static $daysPreferenceName;
  53
  54         /**
  55          * Preference name for 'limit'. Subclasses should override this.
  56          * @var string
  57          */
  58         protected static $limitPreferenceName;
  59
  60         /**
  61          * Preference name for collapsing the active filter display. Subclasses should override this.
  62          * @var string
  63          */
  64         protected static $collapsedPreferenceName;
  65
  66         /** @var string */
  67         protected $rcSubpage;
  68
  69         /** @var FormOptions */
  70         protected $rcOptions;
  71
  72         /** @var array */
  73         protected $customFilters;
  74
  75         // Order of both groups and filters is significant; first is top-most priority,
  76         // descending from there.
  77         // 'showHideSuffix' is a shortcut to and avoid spelling out
  78         // details specific to subclasses here.
  79         /**
  80          * Definition information for the filters and their groups
  81          *
  82          * The value is $groupDefinition, a parameter to the ChangesListFilterGroup constructor.
  83          * However, priority is dynamically added for the core groups, to ease maintenance.
  84          *
  85          * Groups are displayed to the user in the structured UI.  However, if necessary,
  86          * all of the filters in a group can be configured to only display on the
  87          * unstuctured UI, in which case you don't need a group title.  This is done in
  88          * getFilterGroupDefinitionFromLegacyCustomFilters, for example.
  89          *
  90          * @var array $filterGroupDefinitions
  91          */
  92         private $filterGroupDefinitions;
  93
  94         // Same format as filterGroupDefinitions, but for a single group (reviewStatus)
  95         // that is registered conditionally.
  96         private $legacyReviewStatusFilterGroupDefinition;
  97
  98         // Single filter group registered conditionally
  99         private $reviewStatusFilterGroupDefinition;
 100
 101         // Single filter group registered conditionally
 102         private $hideCategorizationFilterDefinition;
 103
 104         /**
 105          * Filter groups, and their contained filters
 106          * This is an associative array (with group name as key) of ChangesListFilterGroup objects.
 107          *
 108          * @var array $filterGroups
 109          */
 110         protected $filterGroups = [];
 111
 112         public function __construct( $name, $restriction ) {
 113                 parent::__construct( $name, $restriction );
 114
 115                 $nonRevisionTypes = [ RC_LOG ];
 116                 Hooks::run( 'SpecialWatchlistGetNonRevisionTypes', [ &$nonRevisionTypes ] );
 117
 118                 $this->filterGroupDefinitions = [
 119                         [
 120                                 'name' => 'registration',
 121                                 'title' => 'rcfilters-filtergroup-registration',
 122                                 'class' => ChangesListBooleanFilterGroup::class,
 123                                 'filters' => [
 124                                         [
 125                                                 'name' => 'hideliu',
 126                                                 // rcshowhideliu-show, rcshowhideliu-hide,
 127                                                 // wlshowhideliu
 128                                                 'showHideSuffix' => 'showhideliu',
 129                                                 'default' => false,
 130                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 131                                                         &$query_options, &$join_conds
 132                                                 ) {
 133                                                         $actorMigration = ActorMigration::newMigration();
 134                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 135                                                         $tables += $actorQuery['tables'];
 136                                                         $join_conds += $actorQuery['joins'];
 137                                                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
 138                                                 },
 139                                                 'isReplacedInStructuredUi' => true,
 140
 141                                         ],
 142                                         [
 143                                                 'name' => 'hideanons',
 144                                                 // rcshowhideanons-show, rcshowhideanons-hide,
 145                                                 // wlshowhideanons
 146                                                 'showHideSuffix' => 'showhideanons',
 147                                                 'default' => false,
 148                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 149                                                         &$query_options, &$join_conds
 150                                                 ) {
 151                                                         $actorMigration = ActorMigration::newMigration();
 152                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 153                                                         $tables += $actorQuery['tables'];
 154                                                         $join_conds += $actorQuery['joins'];
 155                                                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
 156                                                 },
 157                                                 'isReplacedInStructuredUi' => true,
 158                                         ]
 159                                 ],
 160                         ],
 161
 162                         [
 163                                 'name' => 'userExpLevel',
 164                                 'title' => 'rcfilters-filtergroup-userExpLevel',
 165                                 'class' => ChangesListStringOptionsFilterGroup::class,
 166                                 'isFullCoverage' => true,
 167                                 'filters' => [
 168                                         [
 169                                                 'name' => 'unregistered',
 170                                                 'label' => 'rcfilters-filter-user-experience-level-unregistered-label',
 171                                                 'description' => 'rcfilters-filter-user-experience-level-unregistered-description',
 172                                                 'cssClassSuffix' => 'user-unregistered',
 173                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 174                                                         return !$rc->getAttribute( 'rc_user' );
 175                                                 }
 176                                         ],
 177                                         [
 178                                                 'name' => 'registered',
 179                                                 'label' => 'rcfilters-filter-user-experience-level-registered-label',
 180                                                 'description' => 'rcfilters-filter-user-experience-level-registered-description',
 181                                                 'cssClassSuffix' => 'user-registered',
 182                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 183                                                         return $rc->getAttribute( 'rc_user' );
 184                                                 }
 185                                         ],
 186                                         [
 187                                                 'name' => 'newcomer',
 188                                                 'label' => 'rcfilters-filter-user-experience-level-newcomer-label',
 189                                                 'description' => 'rcfilters-filter-user-experience-level-newcomer-description',
 190                                                 'cssClassSuffix' => 'user-newcomer',
 191                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 192                                                         $performer = $rc->getPerformer();
 193                                                         return $performer && $performer->isLoggedIn() &&
 194                                                                 $performer->getExperienceLevel() === 'newcomer';
 195                                                 }
 196                                         ],
 197                                         [
 198                                                 'name' => 'learner',
 199                                                 'label' => 'rcfilters-filter-user-experience-level-learner-label',
 200                                                 'description' => 'rcfilters-filter-user-experience-level-learner-description',
 201                                                 'cssClassSuffix' => 'user-learner',
 202                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 203                                                         $performer = $rc->getPerformer();
 204                                                         return $performer && $performer->isLoggedIn() &&
 205                                                                 $performer->getExperienceLevel() === 'learner';
 206                                                 },
 207                                         ],
 208                                         [
 209                                                 'name' => 'experienced',
 210                                                 'label' => 'rcfilters-filter-user-experience-level-experienced-label',
 211                                                 'description' => 'rcfilters-filter-user-experience-level-experienced-description',
 212                                                 'cssClassSuffix' => 'user-experienced',
 213                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 214                                                         $performer = $rc->getPerformer();
 215                                                         return $performer && $performer->isLoggedIn() &&
 216                                                                 $performer->getExperienceLevel() === 'experienced';
 217                                                 },
 218                                         ]
 219                                 ],
 220                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 221                                 'queryCallable' => [ $this, 'filterOnUserExperienceLevel' ],
 222                         ],
 223
 224                         [
 225                                 'name' => 'authorship',
 226                                 'title' => 'rcfilters-filtergroup-authorship',
 227                                 'class' => ChangesListBooleanFilterGroup::class,
 228                                 'filters' => [
 229                                         [
 230                                                 'name' => 'hidemyself',
 231                                                 'label' => 'rcfilters-filter-editsbyself-label',
 232                                                 'description' => 'rcfilters-filter-editsbyself-description',
 233                                                 // rcshowhidemine-show, rcshowhidemine-hide,
 234                                                 // wlshowhidemine
 235                                                 'showHideSuffix' => 'showhidemine',
 236                                                 'default' => false,
 237                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 238                                                         &$query_options, &$join_conds
 239                                                 ) {
 240                                                         $actorQuery = ActorMigration::newMigration()->getWhere( $dbr, 'rc_user', $ctx->getUser() );
 241                                                         $tables += $actorQuery['tables'];
 242                                                         $join_conds += $actorQuery['joins'];
 243                                                         $conds[] = 'NOT(' . $actorQuery['conds'] . ')';
 244                                                 },
 245                                                 'cssClassSuffix' => 'self',
 246                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 247                                                         return $ctx->getUser()->equals( $rc->getPerformer() );
 248                                                 },
 249                                         ],
 250                                         [
 251                                                 'name' => 'hidebyothers',
 252                                                 'label' => 'rcfilters-filter-editsbyother-label',
 253                                                 'description' => 'rcfilters-filter-editsbyother-description',
 254                                                 'default' => false,
 255                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 256                                                         &$query_options, &$join_conds
 257                                                 ) {
 258                                                         $actorQuery = ActorMigration::newMigration()
 259                                                                 ->getWhere( $dbr, 'rc_user', $ctx->getUser(), false );
 260                                                         $tables += $actorQuery['tables'];
 261                                                         $join_conds += $actorQuery['joins'];
 262                                                         $conds[] = $actorQuery['conds'];
 263                                                 },
 264                                                 'cssClassSuffix' => 'others',
 265                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 266                                                         return !$ctx->getUser()->equals( $rc->getPerformer() );
 267                                                 },
 268                                         ]
 269                                 ]
 270                         ],
 271
 272                         [
 273                                 'name' => 'automated',
 274                                 'title' => 'rcfilters-filtergroup-automated',
 275                                 'class' => ChangesListBooleanFilterGroup::class,
 276                                 'filters' => [
 277                                         [
 278                                                 'name' => 'hidebots',
 279                                                 'label' => 'rcfilters-filter-bots-label',
 280                                                 'description' => 'rcfilters-filter-bots-description',
 281                                                 // rcshowhidebots-show, rcshowhidebots-hide,
 282                                                 // wlshowhidebots
 283                                                 'showHideSuffix' => 'showhidebots',
 284                                                 'default' => false,
 285                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 286                                                         &$query_options, &$join_conds
 287                                                 ) {
 288                                                         $conds['rc_bot'] = 0;
 289                                                 },
 290                                                 'cssClassSuffix' => 'bot',
 291                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 292                                                         return $rc->getAttribute( 'rc_bot' );
 293                                                 },
 294                                         ],
 295                                         [
 296                                                 'name' => 'hidehumans',
 297                                                 'label' => 'rcfilters-filter-humans-label',
 298                                                 'description' => 'rcfilters-filter-humans-description',
 299                                                 'default' => false,
 300                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 301                                                         &$query_options, &$join_conds
 302                                                 ) {
 303                                                         $conds['rc_bot'] = 1;
 304                                                 },
 305                                                 'cssClassSuffix' => 'human',
 306                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 307                                                         return !$rc->getAttribute( 'rc_bot' );
 308                                                 },
 309                                         ]
 310                                 ]
 311                         ],
 312
 313                         // significance (conditional)
 314
 315                         [
 316                                 'name' => 'significance',
 317                                 'title' => 'rcfilters-filtergroup-significance',
 318                                 'class' => ChangesListBooleanFilterGroup::class,
 319                                 'priority' => -6,
 320                                 'filters' => [
 321                                         [
 322                                                 'name' => 'hideminor',
 323                                                 'label' => 'rcfilters-filter-minor-label',
 324                                                 'description' => 'rcfilters-filter-minor-description',
 325                                                 // rcshowhideminor-show, rcshowhideminor-hide,
 326                                                 // wlshowhideminor
 327                                                 'showHideSuffix' => 'showhideminor',
 328                                                 'default' => false,
 329                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 330                                                         &$query_options, &$join_conds
 331                                                 ) {
 332                                                         $conds[] = 'rc_minor = 0';
 333                                                 },
 334                                                 'cssClassSuffix' => 'minor',
 335                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 336                                                         return $rc->getAttribute( 'rc_minor' );
 337                                                 }
 338                                         ],
 339                                         [
 340                                                 'name' => 'hidemajor',
 341                                                 'label' => 'rcfilters-filter-major-label',
 342                                                 'description' => 'rcfilters-filter-major-description',
 343                                                 'default' => false,
 344                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 345                                                         &$query_options, &$join_conds
 346                                                 ) {
 347                                                         $conds[] = 'rc_minor = 1';
 348                                                 },
 349                                                 'cssClassSuffix' => 'major',
 350                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 351                                                         return !$rc->getAttribute( 'rc_minor' );
 352                                                 }
 353                                         ]
 354                                 ]
 355                         ],
 356
 357                         [
 358                                 'name' => 'lastRevision',
 359                                 'title' => 'rcfilters-filtergroup-lastRevision',
 360                                 'class' => ChangesListBooleanFilterGroup::class,
 361                                 'priority' => -7,
 362                                 'filters' => [
 363                                         [
 364                                                 'name' => 'hidelastrevision',
 365                                                 'label' => 'rcfilters-filter-lastrevision-label',
 366                                                 'description' => 'rcfilters-filter-lastrevision-description',
 367                                                 'default' => false,
 368                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 369                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 370                                                         $conds[] = $dbr->makeList(
 371                                                                 [
 372                                                                         'rc_this_oldid <> page_latest',
 373                                                                         'rc_type' => $nonRevisionTypes,
 374                                                                 ],
 375                                                                 LIST_OR
 376                                                         );
 377                                                 },
 378                                                 'cssClassSuffix' => 'last',
 379                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 380                                                         return $rc->getAttribute( 'rc_this_oldid' ) === $rc->getAttribute( 'page_latest' );
 381                                                 }
 382                                         ],
 383                                         [
 384                                                 'name' => 'hidepreviousrevisions',
 385                                                 'label' => 'rcfilters-filter-previousrevision-label',
 386                                                 'description' => 'rcfilters-filter-previousrevision-description',
 387                                                 'default' => false,
 388                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 389                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 390                                                         $conds[] = $dbr->makeList(
 391                                                                 [
 392                                                                         'rc_this_oldid = page_latest',
 393                                                                         'rc_type' => $nonRevisionTypes,
 394                                                                 ],
 395                                                                 LIST_OR
 396                                                         );
 397                                                 },
 398                                                 'cssClassSuffix' => 'previous',
 399                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 400                                                         return $rc->getAttribute( 'rc_this_oldid' ) !== $rc->getAttribute( 'page_latest' );
 401                                                 }
 402                                         ]
 403                                 ]
 404                         ],
 405
 406                         // With extensions, there can be change types that will not be hidden by any of these.
 407                         [
 408                                 'name' => 'changeType',
 409                                 'title' => 'rcfilters-filtergroup-changetype',
 410                                 'class' => ChangesListBooleanFilterGroup::class,
 411                                 'priority' => -8,
 412                                 'filters' => [
 413                                         [
 414                                                 'name' => 'hidepageedits',
 415                                                 'label' => 'rcfilters-filter-pageedits-label',
 416                                                 'description' => 'rcfilters-filter-pageedits-description',
 417                                                 'default' => false,
 418                                                 'priority' => -2,
 419                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 420                                                         &$query_options, &$join_conds
 421                                                 ) {
 422                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_EDIT );
 423                                                 },
 424                                                 'cssClassSuffix' => 'src-mw-edit',
 425                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 426                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_EDIT;
 427                                                 },
 428                                         ],
 429                                         [
 430                                                 'name' => 'hidenewpages',
 431                                                 'label' => 'rcfilters-filter-newpages-label',
 432                                                 'description' => 'rcfilters-filter-newpages-description',
 433                                                 'default' => false,
 434                                                 'priority' => -3,
 435                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 436                                                         &$query_options, &$join_conds
 437                                                 ) {
 438                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_NEW );
 439                                                 },
 440                                                 'cssClassSuffix' => 'src-mw-new',
 441                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 442                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_NEW;
 443                                                 },
 444                                         ],
 445
 446                                         // hidecategorization
 447
 448                                         [
 449                                                 'name' => 'hidelog',
 450                                                 'label' => 'rcfilters-filter-logactions-label',
 451                                                 'description' => 'rcfilters-filter-logactions-description',
 452                                                 'default' => false,
 453                                                 'priority' => -5,
 454                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 455                                                         &$query_options, &$join_conds
 456                                                 ) {
 457                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_LOG );
 458                                                 },
 459                                                 'cssClassSuffix' => 'src-mw-log',
 460                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 461                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_LOG;
 462                                                 }
 463                                         ],
 464                                 ],
 465                         ],
 466
 467                 ];
 468
 469                 $this->legacyReviewStatusFilterGroupDefinition = [
 470                         [
 471                                 'name' => 'legacyReviewStatus',
 472                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 473                                 'class' => ChangesListBooleanFilterGroup::class,
 474                                 'filters' => [
 475                                         [
 476                                                 'name' => 'hidepatrolled',
 477                                                 // rcshowhidepatr-show, rcshowhidepatr-hide
 478                                                 // wlshowhidepatr
 479                                                 'showHideSuffix' => 'showhidepatr',
 480                                                 'default' => false,
 481                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 482                                                         &$query_options, &$join_conds
 483                                                 ) {
 484                                                         $conds['rc_patrolled'] = RecentChange::PRC_UNPATROLLED;
 485                                                 },
 486                                                 'isReplacedInStructuredUi' => true,
 487                                         ],
 488                                         [
 489                                                 'name' => 'hideunpatrolled',
 490                                                 'default' => false,
 491                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 492                                                         &$query_options, &$join_conds
 493                                                 ) {
 494                                                         $conds[] = 'rc_patrolled != ' . RecentChange::PRC_UNPATROLLED;
 495                                                 },
 496                                                 'isReplacedInStructuredUi' => true,
 497                                         ],
 498                                 ],
 499                         ]
 500                 ];
 501
 502                 $this->reviewStatusFilterGroupDefinition = [
 503                         [
 504                                 'name' => 'reviewStatus',
 505                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 506                                 'class' => ChangesListStringOptionsFilterGroup::class,
 507                                 'isFullCoverage' => true,
 508                                 'priority' => -5,
 509                                 'filters' => [
 510                                         [
 511                                                 'name' => 'unpatrolled',
 512                                                 'label' => 'rcfilters-filter-reviewstatus-unpatrolled-label',
 513                                                 'description' => 'rcfilters-filter-reviewstatus-unpatrolled-description',
 514                                                 'cssClassSuffix' => 'reviewstatus-unpatrolled',
 515                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 516                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_UNPATROLLED;
 517                                                 },
 518                                         ],
 519                                         [
 520                                                 'name' => 'manual',
 521                                                 'label' => 'rcfilters-filter-reviewstatus-manual-label',
 522                                                 'description' => 'rcfilters-filter-reviewstatus-manual-description',
 523                                                 'cssClassSuffix' => 'reviewstatus-manual',
 524                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 525                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_PATROLLED;
 526                                                 },
 527                                         ],
 528                                         [
 529                                                 'name' => 'auto',
 530                                                 'label' => 'rcfilters-filter-reviewstatus-auto-label',
 531                                                 'description' => 'rcfilters-filter-reviewstatus-auto-description',
 532                                                 'cssClassSuffix' => 'reviewstatus-auto',
 533                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 534                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_AUTOPATROLLED;
 535                                                 },
 536                                         ],
 537                                 ],
 538                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 539                                 'queryCallable' => function ( $specialPageClassName, $ctx, $dbr,
 540                                         &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selected
 541                                 ) {
 542                                         if ( $selected === [] ) {
 543                                                 return;
 544                                         }
 545                                         $rcPatrolledValues = [
 546                                                 'unpatrolled' => RecentChange::PRC_UNPATROLLED,
 547                                                 'manual' => RecentChange::PRC_PATROLLED,
 548                                                 'auto' => RecentChange::PRC_AUTOPATROLLED,
 549                                         ];
 550                                         // e.g. rc_patrolled IN (0, 2)
 551                                         $conds['rc_patrolled'] = array_map( function ( $s ) use ( $rcPatrolledValues ) {
 552                                                 return $rcPatrolledValues[ $s ];
 553                                         }, $selected );
 554                                 }
 555                         ]
 556                 ];
 557
 558                 $this->hideCategorizationFilterDefinition = [
 559                         'name' => 'hidecategorization',
 560                         'label' => 'rcfilters-filter-categorization-label',
 561                         'description' => 'rcfilters-filter-categorization-description',
 562                         // rcshowhidecategorization-show, rcshowhidecategorization-hide.
 563                         // wlshowhidecategorization
 564                         'showHideSuffix' => 'showhidecategorization',
 565                         'default' => false,
 566                         'priority' => -4,
 567                         'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 568                                 &$query_options, &$join_conds
 569                         ) {
 570                                 $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 571                         },
 572                         'cssClassSuffix' => 'src-mw-categorize',
 573                         'isRowApplicableCallable' => function ( $ctx, $rc ) {
 574                                 return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_CATEGORIZE;
 575                         },
 576                 ];
 577         }
 578
 579         /**
 580          * Check if filters are in conflict and guaranteed to return no results.
 581          *
 582          * @return bool
 583          */
 584         protected function areFiltersInConflict() {
 585                 $opts = $this->getOptions();
 586                 /** @var ChangesListFilterGroup $group */
 587                 foreach ( $this->getFilterGroups() as $group ) {
 588                         if ( $group->getConflictingGroups() ) {
 589                                 wfLogWarning(
 590                                         $group->getName() .
 591                                         " specifies conflicts with other groups but these are not supported yet."
 592                                 );
 593                         }
 594
 595                         /** @var ChangesListFilter $conflictingFilter */
 596                         foreach ( $group->getConflictingFilters() as $conflictingFilter ) {
 597                                 if ( $conflictingFilter->activelyInConflictWithGroup( $group, $opts ) ) {
 598                                         return true;
 599                                 }
 600                         }
 601
 602                         /** @var ChangesListFilter $filter */
 603                         foreach ( $group->getFilters() as $filter ) {
 604                                 /** @var ChangesListFilter $conflictingFilter */
 605                                 foreach ( $filter->getConflictingFilters() as $conflictingFilter ) {
 606                                         if (
 607                                                 $conflictingFilter->activelyInConflictWithFilter( $filter, $opts ) &&
 608                                                 $filter->activelyInConflictWithFilter( $conflictingFilter, $opts )
 609                                         ) {
 610                                                 return true;
 611                                         }
 612                                 }
 613
 614                         }
 615
 616                 }
 617
 618                 return false;
 619         }
 620
 621         /**
 622          * Main execution point
 623          *
 624          * @param string $subpage
 625          */
 626         public function execute( $subpage ) {
 627                 $this->rcSubpage = $subpage;
 628
 629                 $this->considerActionsForDefaultSavedQuery( $subpage );
 630
 631                 $opts = $this->getOptions();
 632                 try {
 633                         $rows = $this->getRows();
 634                         if ( $rows === false ) {
 635                                 $rows = new FakeResultWrapper( [] );
 636                         }
 637
 638                         // Used by Structured UI app to get results without MW chrome
 639                         if ( $this->getRequest()->getVal( 'action' ) === 'render' ) {
 640                                 $this->getOutput()->setArticleBodyOnly( true );
 641                         }
 642
 643                         // Used by "live update" and "view newest" to check
 644                         // if there's new changes with minimal data transfer
 645                         if ( $this->getRequest()->getBool( 'peek' ) ) {
 646                                 $code = $rows->numRows() > 0 ? 200 : 204;
 647                                 $this->getOutput()->setStatusCode( $code );
 648
 649                                 if ( $this->getUser()->isAnon() !==
 650                                         $this->getRequest()->getFuzzyBool( 'isAnon' )
 651                                 ) {
 652                                         $this->getOutput()->setStatusCode( 205 );
 653                                 }
 654
 655                                 return;
 656                         }
 657
 658                         $batch = new LinkBatch;
 659                         foreach ( $rows as $row ) {
 660                                 $batch->add( NS_USER, $row->rc_user_text );
 661                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 662                                 $batch->add( $row->rc_namespace, $row->rc_title );
 663                                 if ( $row->rc_source === RecentChange::SRC_LOG ) {
 664                                         $formatter = LogFormatter::newFromRow( $row );
 665                                         foreach ( $formatter->getPreloadTitles() as $title ) {
 666                                                 $batch->addObj( $title );
 667                                         }
 668                                 }
 669                         }
 670                         $batch->execute();
 671
 672                         $this->setHeaders();
 673                         $this->outputHeader();
 674                         $this->addModules();
 675                         $this->webOutput( $rows, $opts );
 676
 677                         $rows->free();
 678                 } catch ( DBQueryTimeoutError $timeoutException ) {
 679                         MWExceptionHandler::logException( $timeoutException );
 680
 681                         $this->setHeaders();
 682                         $this->outputHeader();
 683                         $this->addModules();
 684
 685                         $this->getOutput()->setStatusCode( 500 );
 686                         $this->webOutputHeader( 0, $opts );
 687                         $this->outputTimeout();
 688                 }
 689
 690                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 691                         // Clean up any bad page entries for titles showing up in RC
 692                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 693                                 $this->getDB(),
 694                                 LoggerFactory::getInstance( 'objectcache' )
 695                         ) );
 696                 }
 697
 698                 $this->includeRcFiltersApp();
 699         }
 700
 701         /**
 702          * Check whether or not the page should load defaults, and if so, whether
 703          * a default saved query is relevant to be redirected to. If it is relevant,
 704          * redirect properly with all necessary query parameters.
 705          *
 706          * @param string $subpage
 707          */
 708         protected function considerActionsForDefaultSavedQuery( $subpage ) {
 709                 if ( !$this->isStructuredFilterUiEnabled() || $this->including() ) {
 710                         return;
 711                 }
 712
 713                 $knownParams = $this->getRequest()->getValues(
 714                         ...array_keys( $this->getOptions()->getAllValues() )
 715                 );
 716
 717                 // HACK: Temporarily until we can properly define "sticky" filters and parameters,
 718                 // we need to exclude several parameters we know should not be counted towards preventing
 719                 // the loading of defaults.
 720                 $excludedParams = [ 'limit' => '', 'days' => '', 'enhanced' => '', 'from' => '' ];
 721                 $knownParams = array_diff_key( $knownParams, $excludedParams );
 722
 723                 if (
 724                         // If there are NO known parameters in the URL request
 725                         // (that are not excluded) then we need to check into loading
 726                         // the default saved query
 727                         count( $knownParams ) === 0
 728                 ) {
 729                         // Get the saved queries data and parse it
 730                         $savedQueries = FormatJson::decode(
 731                                 $this->getUser()->getOption( static::$savedQueriesPreferenceName ),
 732                                 true
 733                         );
 734
 735                         if ( $savedQueries && isset( $savedQueries[ 'default' ] ) ) {
 736                                 // Only load queries that are 'version' 2, since those
 737                                 // have parameter representation
 738                                 if ( isset( $savedQueries[ 'version' ] ) && $savedQueries[ 'version' ] === '2' ) {
 739                                         $savedQueryDefaultID = $savedQueries[ 'default' ];
 740                                         $defaultQuery = $savedQueries[ 'queries' ][ $savedQueryDefaultID ][ 'data' ];
 741
 742                                         // Build the entire parameter list
 743                                         $query = array_merge(
 744                                                 $defaultQuery[ 'params' ],
 745                                                 $defaultQuery[ 'highlights' ],
 746                                                 [
 747                                                         'urlversion' => '2',
 748                                                 ]
 749                                         );
 750                                         // Add to the query any parameters that we may have ignored before
 751                                         // but are still valid and requested in the URL
 752                                         $query = array_merge( $this->getRequest()->getValues(), $query );
 753                                         unset( $query[ 'title' ] );
 754                                         $this->getOutput()->redirect( $this->getPageTitle( $subpage )->getCanonicalURL( $query ) );
 755                                 } else {
 756                                         // There's a default, but the version is not 2, and the server can't
 757                                         // actually recognize the query itself. This happens if it is before
 758                                         // the conversion, so we need to tell the UI to reload saved query as
 759                                         // it does the conversion to version 2
 760                                         $this->getOutput()->addJsConfigVars(
 761                                                 'wgStructuredChangeFiltersDefaultSavedQueryExists',
 762                                                 true
 763                                         );
 764
 765                                         // Add the class that tells the frontend it is still loading
 766                                         // another query
 767                                         $this->getOutput()->addBodyClasses( 'mw-rcfilters-ui-loading' );
 768                                 }
 769                         }
 770                 }
 771         }
 772
 773         /**
 774          * Include the modules and configuration for the RCFilters app.
 775          * Conditional on the user having the feature enabled.
 776          *
 777          * If it is disabled, add a <body> class marking that
 778          */
 779         protected function includeRcFiltersApp() {
 780                 $out = $this->getOutput();
 781                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
 782                         $jsData = $this->getStructuredFilterJsData();
 783
 784                         $messages = [];
 785                         foreach ( $jsData['messageKeys'] as $key ) {
 786                                 $messages[$key] = $this->msg( $key )->plain();
 787                         }
 788                         $out->addBodyClasses( 'mw-rcfilters-enabled' );
 789
 790                         $collapsed = $this->getUser()->getBoolOption( static::$collapsedPreferenceName );
 791                         if ( $collapsed ) {
 792                                 $out->addBodyClasses( 'mw-rcfilters-collapsed' );
 793                         }
 794
 795                         $out->addHTML(
 796                                 ResourceLoader::makeInlineScript(
 797                                         ResourceLoader::makeMessageSetScript( $messages ),
 798                                         $out->getCSPNonce()
 799                                 )
 800                         );
 801
 802                         $out->addJsConfigVars( 'wgStructuredChangeFilters', $jsData['groups'] );
 803                         $out->addJsConfigVars( 'wgStructuredChangeFiltersCollapsedState', $collapsed );
 804
 805                         $out->addJsConfigVars(
 806                                 'wgRCFiltersChangeTags',
 807                                 $this->getChangeTagList()
 808                         );
 809                         $out->addJsConfigVars(
 810                                 'StructuredChangeFiltersDisplayConfig',
 811                                 [
 812                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 813                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 814                                         'limitDefault' => $this->getDefaultLimit(),
 815                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 816                                         'daysDefault' => $this->getDefaultDays(),
 817                                 ]
 818                         );
 819
 820                         $out->addJsConfigVars(
 821                                 'wgStructuredChangeFiltersSavedQueriesPreferenceName',
 822                                 static::$savedQueriesPreferenceName
 823                         );
 824                         $out->addJsConfigVars(
 825                                 'wgStructuredChangeFiltersLimitPreferenceName',
 826                                 static::$limitPreferenceName
 827                         );
 828                         $out->addJsConfigVars(
 829                                 'wgStructuredChangeFiltersDaysPreferenceName',
 830                                 static::$daysPreferenceName
 831                         );
 832                         $out->addJsConfigVars(
 833                                 'wgStructuredChangeFiltersCollapsedPreferenceName',
 834                                 static::$collapsedPreferenceName
 835                         );
 836
 837                         $out->addJsConfigVars(
 838                                 'StructuredChangeFiltersLiveUpdatePollingRate',
 839                                 $this->getConfig()->get( 'StructuredChangeFiltersLiveUpdatePollingRate' )
 840                         );
 841                 } else {
 842                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 843                 }
 844         }
 845
 846         /**
 847          * Fetch the change tags list for the front end
 848          *
 849          * @return Array Tag data
 850          */
 851         protected function getChangeTagList() {
 852                 $cache = ObjectCache::getMainWANInstance();
 853                 $context = $this->getContext();
 854                 return $cache->getWithSetCallback(
 855                         $cache->makeKey( 'changeslistspecialpage-changetags', $context->getLanguage()->getCode() ),
 856                         $cache::TTL_MINUTE * 10,
 857                         function () use ( $context ) {
 858                                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 859                                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 860
 861                                 // Hit counts disabled for perf reasons, see T169997
 862                                 /*
 863                                 $tagStats = ChangeTags::tagUsageStatistics();
 864                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 865
 866                                 // Sort by hits
 867                                 arsort( $tagHitCounts );
 868                                 */
 869                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags );
 870
 871                                 // Build the list and data
 872                                 $result = [];
 873                                 foreach ( $tagHitCounts as $tagName => $hits ) {
 874                                         if (
 875                                                 // Only get active tags
 876                                                 isset( $explicitlyDefinedTags[ $tagName ] ) ||
 877                                                 isset( $softwareActivatedTags[ $tagName ] )
 878                                         ) {
 879                                                 $result[] = [
 880                                                         'name' => $tagName,
 881                                                         'label' => Sanitizer::stripAllTags(
 882                                                                 ChangeTags::tagDescription( $tagName, $context )
 883                                                         ),
 884                                                         'description' =>
 885                                                                 ChangeTags::truncateTagDescription(
 886                                                                         $tagName, self::TAG_DESC_CHARACTER_LIMIT, $context
 887                                                                 ),
 888                                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 889                                                         'hits' => $hits,
 890                                                 ];
 891                                         }
 892                                 }
 893
 894                                 // Instead of sorting by hit count (disabled, see above), sort by display name
 895                                 usort( $result, function ( $a, $b ) {
 896                                         return strcasecmp( $a['label'], $b['label'] );
 897                                 } );
 898
 899                                 return $result;
 900                         },
 901                         [
 902                                 'lockTSE' => 30
 903                         ]
 904                 );
 905         }
 906
 907         /**
 908          * Add the "no results" message to the output
 909          */
 910         protected function outputNoResults() {
 911                 $this->getOutput()->addHTML(
 912                         '<div class="mw-changeslist-empty">' .
 913                         $this->msg( 'recentchanges-noresult' )->parse() .
 914                         '</div>'
 915                 );
 916         }
 917
 918         /**
 919          * Add the "timeout" message to the output
 920          */
 921         protected function outputTimeout() {
 922                 $this->getOutput()->addHTML(
 923                         '<div class="mw-changeslist-empty mw-changeslist-timeout">' .
 924                         $this->msg( 'recentchanges-timeout' )->parse() .
 925                         '</div>'
 926                 );
 927         }
 928
 929         /**
 930          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 931          *
 932          * @return bool|IResultWrapper Result or false
 933          */
 934         public function getRows() {
 935                 $opts = $this->getOptions();
 936
 937                 $tables = [];
 938                 $fields = [];
 939                 $conds = [];
 940                 $query_options = [];
 941                 $join_conds = [];
 942                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 943
 944                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 945         }
 946
 947         /**
 948          * Get the current FormOptions for this request
 949          *
 950          * @return FormOptions
 951          */
 952         public function getOptions() {
 953                 if ( $this->rcOptions === null ) {
 954                         $this->rcOptions = $this->setup( $this->rcSubpage );
 955                 }
 956
 957                 return $this->rcOptions;
 958         }
 959
 960         /**
 961          * Register all filters and their groups (including those from hooks), plus handle
 962          * conflicts and defaults.
 963          *
 964          * You might want to customize these in the same method, in subclasses.  You can
 965          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 966          * filter, then make necessary modfications to the filter or group (e.g. with
 967          * setDefault).
 968          */
 969         protected function registerFilters() {
 970                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 971
 972                 // Make sure this is not being transcluded (we don't want to show this
 973                 // information to all users just because the user that saves the edit can
 974                 // patrol or is logged in)
 975                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 976                         $this->registerFiltersFromDefinitions( $this->legacyReviewStatusFilterGroupDefinition );
 977                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 978                 }
 979
 980                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 981
 982                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 983                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 984                                 $this->hideCategorizationFilterDefinition
 985                         );
 986
 987                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 988
 989                         $hideCategorization = new ChangesListBooleanFilter(
 990                                 $transformedHideCategorizationDef
 991                         );
 992                 }
 993
 994                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 995
 996                 $unstructuredGroupDefinition =
 997                         $this->getFilterGroupDefinitionFromLegacyCustomFilters(
 998                                 $this->getCustomFilters()
 999                         );
1000                 $this->registerFiltersFromDefinitions( [ $unstructuredGroupDefinition ] );
1001
1002                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
1003                 $registered = $userExperienceLevel->getFilter( 'registered' );
1004                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
1005                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
1006                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
1007
1008                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
1009                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
1010                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
1011
1012                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
1013                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
1014
1015                 // categoryFilter is conditional; see registerFilters
1016                 if ( $categoryFilter !== null ) {
1017                         $hideMinorFilter->conflictsWith(
1018                                 $categoryFilter,
1019                                 'rcfilters-hideminor-conflicts-typeofchange-global',
1020                                 'rcfilters-hideminor-conflicts-typeofchange',
1021                                 'rcfilters-typeofchange-conflicts-hideminor'
1022                         );
1023                 }
1024                 $hideMinorFilter->conflictsWith(
1025                         $logactionsFilter,
1026                         'rcfilters-hideminor-conflicts-typeofchange-global',
1027                         'rcfilters-hideminor-conflicts-typeofchange',
1028                         'rcfilters-typeofchange-conflicts-hideminor'
1029                 );
1030                 $hideMinorFilter->conflictsWith(
1031                         $pagecreationFilter,
1032                         'rcfilters-hideminor-conflicts-typeofchange-global',
1033                         'rcfilters-hideminor-conflicts-typeofchange',
1034                         'rcfilters-typeofchange-conflicts-hideminor'
1035                 );
1036         }
1037
1038         /**
1039          * Transforms filter definition to prepare it for constructor.
1040          *
1041          * See overrides of this method as well.
1042          *
1043          * @param array $filterDefinition Original filter definition
1044          *
1045          * @return array Transformed definition
1046          */
1047         protected function transformFilterDefinition( array $filterDefinition ) {
1048                 return $filterDefinition;
1049         }
1050
1051         /**
1052          * Register filters from a definition object
1053          *
1054          * Array specifying groups and their filters; see Filter and
1055          * ChangesListFilterGroup constructors.
1056          *
1057          * There is light processing to simplify core maintenance.
1058          * @param array $definition
1059          */
1060         protected function registerFiltersFromDefinitions( array $definition ) {
1061                 $autoFillPriority = -1;
1062                 foreach ( $definition as $groupDefinition ) {
1063                         if ( !isset( $groupDefinition['priority'] ) ) {
1064                                 $groupDefinition['priority'] = $autoFillPriority;
1065                         } else {
1066                                 // If it's explicitly specified, start over the auto-fill
1067                                 $autoFillPriority = $groupDefinition['priority'];
1068                         }
1069
1070                         $autoFillPriority--;
1071
1072                         $className = $groupDefinition['class'];
1073                         unset( $groupDefinition['class'] );
1074
1075                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
1076                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
1077                         }
1078
1079                         $this->registerFilterGroup( new $className( $groupDefinition ) );
1080                 }
1081         }
1082
1083         /**
1084          * Get filter group definition from legacy custom filters
1085          *
1086          * @param array $customFilters Custom filters from legacy hooks
1087          * @return array Group definition
1088          */
1089         protected function getFilterGroupDefinitionFromLegacyCustomFilters( array $customFilters ) {
1090                 // Special internal unstructured group
1091                 $unstructuredGroupDefinition = [
1092                         'name' => 'unstructured',
1093                         'class' => ChangesListBooleanFilterGroup::class,
1094                         'priority' => -1, // Won't display in structured
1095                         'filters' => [],
1096                 ];
1097
1098                 foreach ( $customFilters as $name => $params ) {
1099                         $unstructuredGroupDefinition['filters'][] = [
1100                                 'name' => $name,
1101                                 'showHide' => $params['msg'],
1102                                 'default' => $params['default'],
1103                         ];
1104                 }
1105
1106                 return $unstructuredGroupDefinition;
1107         }
1108
1109         /**
1110          * @return array The legacy show/hide toggle filters
1111          */
1112         protected function getLegacyShowHideFilters() {
1113                 $filters = [];
1114                 foreach ( $this->filterGroups as $group ) {
1115                         if ( $group instanceof  ChangesListBooleanFilterGroup ) {
1116                                 foreach ( $group->getFilters() as $key => $filter ) {
1117                                         if ( $filter->displaysOnUnstructuredUi( $this ) ) {
1118                                                 $filters[ $key ] = $filter;
1119                                         }
1120                                 }
1121                         }
1122                 }
1123                 return $filters;
1124         }
1125
1126         /**
1127          * Register all the filters, including legacy hook-driven ones.
1128          * Then create a FormOptions object with options as specified by the user
1129          *
1130          * @param array $parameters
1131          *
1132          * @return FormOptions
1133          */
1134         public function setup( $parameters ) {
1135                 $this->registerFilters();
1136
1137                 $opts = $this->getDefaultOptions();
1138
1139                 $opts = $this->fetchOptionsFromRequest( $opts );
1140
1141                 // Give precedence to subpage syntax
1142                 if ( $parameters !== null ) {
1143                         $this->parseParameters( $parameters, $opts );
1144                 }
1145
1146                 $this->validateOptions( $opts );
1147
1148                 return $opts;
1149         }
1150
1151         /**
1152          * Get a FormOptions object containing the default options. By default, returns
1153          * some basic options.  The filters listed explicitly here are overriden in this
1154          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
1155          * and more) are structured.  Structured filters are overriden in registerFilters.
1156          * not here.
1157          *
1158          * @return FormOptions
1159          */
1160         public function getDefaultOptions() {
1161                 $opts = new FormOptions();
1162                 $structuredUI = $this->isStructuredFilterUiEnabled();
1163                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
1164                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
1165
1166                 /** @var ChangesListFilterGroup $filterGroup */
1167                 foreach ( $this->filterGroups as $filterGroup ) {
1168                         $filterGroup->addOptions( $opts, $useDefaults, $structuredUI );
1169                 }
1170
1171                 $opts->add( 'namespace', '', FormOptions::STRING );
1172                 $opts->add( 'invert', false );
1173                 $opts->add( 'associated', false );
1174                 $opts->add( 'urlversion', 1 );
1175                 $opts->add( 'tagfilter', '' );
1176
1177                 $opts->add( 'days', $this->getDefaultDays(), FormOptions::FLOAT );
1178                 $opts->add( 'limit', $this->getDefaultLimit(), FormOptions::INT );
1179
1180                 $opts->add( 'from', '' );
1181
1182                 return $opts;
1183         }
1184
1185         /**
1186          * Register a structured changes list filter group
1187          *
1188          * @param ChangesListFilterGroup $group
1189          */
1190         public function registerFilterGroup( ChangesListFilterGroup $group ) {
1191                 $groupName = $group->getName();
1192
1193                 $this->filterGroups[$groupName] = $group;
1194         }
1195
1196         /**
1197          * Gets the currently registered filters groups
1198          *
1199          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
1200          */
1201         protected function getFilterGroups() {
1202                 return $this->filterGroups;
1203         }
1204
1205         /**
1206          * Gets a specified ChangesListFilterGroup by name
1207          *
1208          * @param string $groupName Name of group
1209          *
1210          * @return ChangesListFilterGroup|null Group, or null if not registered
1211          */
1212         public function getFilterGroup( $groupName ) {
1213                 return $this->filterGroups[$groupName] ?? null;
1214         }
1215
1216         // Currently, this intentionally only includes filters that display
1217         // in the structured UI.  This can be changed easily, though, if we want
1218         // to include data on filters that use the unstructured UI.  messageKeys is a
1219         // special top-level value, with the value being an array of the message keys to
1220         // send to the client.
1221         /**
1222          * Gets structured filter information needed by JS
1223          *
1224          * @return array Associative array
1225          * * array $return['groups'] Group data
1226          * * array $return['messageKeys'] Array of message keys
1227          */
1228         public function getStructuredFilterJsData() {
1229                 $output = [
1230                         'groups' => [],
1231                         'messageKeys' => [],
1232                 ];
1233
1234                 usort( $this->filterGroups, function ( $a, $b ) {
1235                         return $b->getPriority() <=> $a->getPriority();
1236                 } );
1237
1238                 foreach ( $this->filterGroups as $groupName => $group ) {
1239                         $groupOutput = $group->getJsData( $this );
1240                         if ( $groupOutput !== null ) {
1241                                 $output['messageKeys'] = array_merge(
1242                                         $output['messageKeys'],
1243                                         $groupOutput['messageKeys']
1244                                 );
1245
1246                                 unset( $groupOutput['messageKeys'] );
1247                                 $output['groups'][] = $groupOutput;
1248                         }
1249                 }
1250
1251                 return $output;
1252         }
1253
1254         /**
1255          * Get custom show/hide filters using deprecated ChangesListSpecialPageFilters
1256          * hook.
1257          *
1258          * @return array Map of filter URL param names to properties (msg/default)
1259          */
1260         protected function getCustomFilters() {
1261                 if ( $this->customFilters === null ) {
1262                         $this->customFilters = [];
1263                         Hooks::run( 'ChangesListSpecialPageFilters', [ $this, &$this->customFilters ], '1.29' );
1264                 }
1265
1266                 return $this->customFilters;
1267         }
1268
1269         /**
1270          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1271          *
1272          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1273          *
1274          * @param FormOptions $opts
1275          * @return FormOptions
1276          */
1277         protected function fetchOptionsFromRequest( $opts ) {
1278                 $opts->fetchValuesFromRequest( $this->getRequest() );
1279
1280                 return $opts;
1281         }
1282
1283         /**
1284          * Process $par and put options found in $opts. Used when including the page.
1285          *
1286          * @param string $par
1287          * @param FormOptions $opts
1288          */
1289         public function parseParameters( $par, FormOptions $opts ) {
1290                 $stringParameterNameSet = [];
1291                 $hideParameterNameSet = [];
1292
1293                 // URL parameters can be per-group, like 'userExpLevel',
1294                 // or per-filter, like 'hideminor'.
1295
1296                 foreach ( $this->filterGroups as $filterGroup ) {
1297                         if ( $filterGroup instanceof ChangesListStringOptionsFilterGroup ) {
1298                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1299                         } elseif ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1300                                 foreach ( $filterGroup->getFilters() as $filter ) {
1301                                         $hideParameterNameSet[$filter->getName()] = true;
1302                                 }
1303                         }
1304                 }
1305
1306                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1307                 foreach ( $bits as $bit ) {
1308                         $m = [];
1309                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1310                                 // hidefoo => hidefoo=true
1311                                 $opts[$bit] = true;
1312                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1313                                 // foo => hidefoo=false
1314                                 $opts["hide$bit"] = false;
1315                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1316                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1317                                         $opts[$m[1]] = $m[2];
1318                                 }
1319                         }
1320                 }
1321         }
1322
1323         /**
1324          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1325          *
1326          * @param FormOptions $opts
1327          */
1328         public function validateOptions( FormOptions $opts ) {
1329                 $isContradictory = $this->fixContradictoryOptions( $opts );
1330                 $isReplaced = $this->replaceOldOptions( $opts );
1331
1332                 if ( $isContradictory || $isReplaced ) {
1333                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1334                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1335                 }
1336
1337                 $opts->validateIntBounds( 'limit', 0, 5000 );
1338                 $opts->validateBounds( 'days', 0, $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
1339         }
1340
1341         /**
1342          * Fix invalid options by resetting pairs that should never appear together.
1343          *
1344          * @param FormOptions $opts
1345          * @return bool True if any option was reset
1346          */
1347         private function fixContradictoryOptions( FormOptions $opts ) {
1348                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1349
1350                 foreach ( $this->filterGroups as $filterGroup ) {
1351                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1352                                 $filters = $filterGroup->getFilters();
1353
1354                                 if ( count( $filters ) === 1 ) {
1355                                         // legacy boolean filters should not be considered
1356                                         continue;
1357                                 }
1358
1359                                 $allInGroupEnabled = array_reduce(
1360                                         $filters,
1361                                         function ( $carry, $filter ) use ( $opts ) {
1362                                                 return $carry && $opts[ $filter->getName() ];
1363                                         },
1364                                         /* initialValue */ count( $filters ) > 0
1365                                 );
1366
1367                                 if ( $allInGroupEnabled ) {
1368                                         foreach ( $filters as $filter ) {
1369                                                 $opts[ $filter->getName() ] = false;
1370                                         }
1371
1372                                         $fixed = true;
1373                                 }
1374                         }
1375                 }
1376
1377                 return $fixed;
1378         }
1379
1380         /**
1381          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1382          * compatibility.
1383          *
1384          * This is deprecated and may be removed.
1385          *
1386          * @param FormOptions $opts
1387          * @return bool True if this change was mode
1388          */
1389         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1390                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1391                         $opts->reset( 'hideanons' );
1392                         if ( !$opts['hidebots'] ) {
1393                                 $opts->reset( 'hideliu' );
1394                                 $opts['hidehumans'] = 1;
1395                         }
1396
1397                         return true;
1398                 }
1399
1400                 return false;
1401         }
1402
1403         /**
1404          * Replace old options with their structured UI equivalents
1405          *
1406          * @param FormOptions $opts
1407          * @return bool True if the change was made
1408          */
1409         public function replaceOldOptions( FormOptions $opts ) {
1410                 if ( !$this->isStructuredFilterUiEnabled() ) {
1411                         return false;
1412                 }
1413
1414                 $changed = false;
1415
1416                 // At this point 'hideanons' and 'hideliu' cannot be both true,
1417                 // because fixBackwardsCompatibilityOptions resets (at least) 'hideanons' in such case
1418                 if ( $opts[ 'hideanons' ] ) {
1419                         $opts->reset( 'hideanons' );
1420                         $opts[ 'userExpLevel' ] = 'registered';
1421                         $changed = true;
1422                 }
1423
1424                 if ( $opts[ 'hideliu' ] ) {
1425                         $opts->reset( 'hideliu' );
1426                         $opts[ 'userExpLevel' ] = 'unregistered';
1427                         $changed = true;
1428                 }
1429
1430                 if ( $this->getFilterGroup( 'legacyReviewStatus' ) ) {
1431                         if ( $opts[ 'hidepatrolled' ] ) {
1432                                 $opts->reset( 'hidepatrolled' );
1433                                 $opts[ 'reviewStatus' ] = 'unpatrolled';
1434                                 $changed = true;
1435                         }
1436
1437                         if ( $opts[ 'hideunpatrolled' ] ) {
1438                                 $opts->reset( 'hideunpatrolled' );
1439                                 $opts[ 'reviewStatus' ] = implode(
1440                                         ChangesListStringOptionsFilterGroup::SEPARATOR,
1441                                         [ 'manual', 'auto' ]
1442                                 );
1443                                 $changed = true;
1444                         }
1445                 }
1446
1447                 return $changed;
1448         }
1449
1450         /**
1451          * Convert parameters values from true/false to 1/0
1452          * so they are not omitted by wfArrayToCgi()
1453          * Bug 36524
1454          *
1455          * @param array $params
1456          * @return array
1457          */
1458         protected function convertParamsForLink( $params ) {
1459                 foreach ( $params as &$value ) {
1460                         if ( $value === false ) {
1461                                 $value = '0';
1462                         }
1463                 }
1464                 unset( $value );
1465                 return $params;
1466         }
1467
1468         /**
1469          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1470          * the user requested.
1471          *
1472          * @param array &$tables Array of tables; see IDatabase::select $table
1473          * @param array &$fields Array of fields; see IDatabase::select $vars
1474          * @param array &$conds Array of conditions; see IDatabase::select $conds
1475          * @param array &$query_options Array of query options; see IDatabase::select $options
1476          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1477          * @param FormOptions $opts
1478          */
1479         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1480                 &$join_conds, FormOptions $opts
1481         ) {
1482                 $dbr = $this->getDB();
1483                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1484
1485                 /** @var ChangesListFilterGroup $filterGroup */
1486                 foreach ( $this->filterGroups as $filterGroup ) {
1487                         $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1488                                 $query_options, $join_conds, $opts, $isStructuredUI );
1489                 }
1490
1491                 // Namespace filtering
1492                 if ( $opts[ 'namespace' ] !== '' ) {
1493                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1494
1495                         if ( $opts[ 'associated' ] ) {
1496                                 $associatedNamespaces = array_map(
1497                                         function ( $ns ) {
1498                                                 return MWNamespace::getAssociated( $ns );
1499                                         },
1500                                         $namespaces
1501                                 );
1502                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1503                         }
1504
1505                         if ( count( $namespaces ) === 1 ) {
1506                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1507                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1508                         } else {
1509                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1510                                 sort( $namespaces );
1511                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1512                         }
1513                         $conds[] = "rc_namespace $operator $value";
1514                 }
1515
1516                 // Calculate cutoff
1517                 $cutoff_unixtime = time() - $opts['days'] * 3600 * 24;
1518                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
1519
1520                 $fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
1521                 if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
1522                         $cutoff = $dbr->timestamp( $opts['from'] );
1523                 } else {
1524                         $opts->reset( 'from' );
1525                 }
1526
1527                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
1528         }
1529
1530         /**
1531          * Process the query
1532          *
1533          * @param array $tables Array of tables; see IDatabase::select $table
1534          * @param array $fields Array of fields; see IDatabase::select $vars
1535          * @param array $conds Array of conditions; see IDatabase::select $conds
1536          * @param array $query_options Array of query options; see IDatabase::select $options
1537          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1538          * @param FormOptions $opts
1539          * @return bool|IResultWrapper Result or false
1540          */
1541         protected function doMainQuery( $tables, $fields, $conds,
1542                 $query_options, $join_conds, FormOptions $opts
1543         ) {
1544                 $rcQuery = RecentChange::getQueryInfo();
1545                 $tables = array_merge( $tables, $rcQuery['tables'] );
1546                 $fields = array_merge( $rcQuery['fields'], $fields );
1547                 $join_conds = array_merge( $join_conds, $rcQuery['joins'] );
1548
1549                 ChangeTags::modifyDisplayQuery(
1550                         $tables,
1551                         $fields,
1552                         $conds,
1553                         $join_conds,
1554                         $query_options,
1555                         ''
1556                 );
1557
1558                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1559                         $opts )
1560                 ) {
1561                         return false;
1562                 }
1563
1564                 $dbr = $this->getDB();
1565
1566                 return $dbr->select(
1567                         $tables,
1568                         $fields,
1569                         $conds,
1570                         __METHOD__,
1571                         $query_options,
1572                         $join_conds
1573                 );
1574         }
1575
1576         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1577                 &$query_options, &$join_conds, $opts
1578         ) {
1579                 return Hooks::run(
1580                         'ChangesListSpecialPageQuery',
1581                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1582                 );
1583         }
1584
1585         /**
1586          * Return a IDatabase object for reading
1587          *
1588          * @return IDatabase
1589          */
1590         protected function getDB() {
1591                 return wfGetDB( DB_REPLICA );
1592         }
1593
1594         /**
1595          * Send header output to the OutputPage object, only called if not using feeds
1596          *
1597          * @param int $rowCount Number of database rows
1598          * @param FormOptions $opts
1599          */
1600         private function webOutputHeader( $rowCount, $opts ) {
1601                 if ( !$this->including() ) {
1602                         $this->outputFeedLinks();
1603                         $this->doHeader( $opts, $rowCount );
1604                 }
1605         }
1606
1607         /**
1608          * Send output to the OutputPage object, only called if not used feeds
1609          *
1610          * @param IResultWrapper $rows Database rows
1611          * @param FormOptions $opts
1612          */
1613         public function webOutput( $rows, $opts ) {
1614                 $this->webOutputHeader( $rows->numRows(), $opts );
1615
1616                 $this->outputChangesList( $rows, $opts );
1617         }
1618
1619         /**
1620          * Output feed links.
1621          */
1622         public function outputFeedLinks() {
1623                 // nothing by default
1624         }
1625
1626         /**
1627          * Build and output the actual changes list.
1628          *
1629          * @param IResultWrapper $rows Database rows
1630          * @param FormOptions $opts
1631          */
1632         abstract public function outputChangesList( $rows, $opts );
1633
1634         /**
1635          * Set the text to be displayed above the changes
1636          *
1637          * @param FormOptions $opts
1638          * @param int $numRows Number of rows in the result to show after this header
1639          */
1640         public function doHeader( $opts, $numRows ) {
1641                 $this->setTopText( $opts );
1642
1643                 // @todo Lots of stuff should be done here.
1644
1645                 $this->setBottomText( $opts );
1646         }
1647
1648         /**
1649          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
1650          * or similar methods to print the text.
1651          *
1652          * @param FormOptions $opts
1653          */
1654         public function setTopText( FormOptions $opts ) {
1655                 // nothing by default
1656         }
1657
1658         /**
1659          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
1660          * or similar methods to print the text.
1661          *
1662          * @param FormOptions $opts
1663          */
1664         public function setBottomText( FormOptions $opts ) {
1665                 // nothing by default
1666         }
1667
1668         /**
1669          * Get options to be displayed in a form
1670          * @todo This should handle options returned by getDefaultOptions().
1671          * @todo Not called by anything in this class (but is in subclasses), should be
1672          * called by something… doHeader() maybe?
1673          *
1674          * @param FormOptions $opts
1675          * @return array
1676          */
1677         public function getExtraOptions( $opts ) {
1678                 return [];
1679         }
1680
1681         /**
1682          * Return the legend displayed within the fieldset
1683          *
1684          * @return string
1685          */
1686         public function makeLegend() {
1687                 $context = $this->getContext();
1688                 $user = $context->getUser();
1689                 # The legend showing what the letters and stuff mean
1690                 $legend = Html::openElement( 'dl' ) . "\n";
1691                 # Iterates through them and gets the messages for both letter and tooltip
1692                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1693                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1694                         unset( $legendItems['unpatrolled'] );
1695                 }
1696                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1697                         $label = $item['legend'] ?? $item['title'];
1698                         $letter = $item['letter'];
1699                         $cssClass = $item['class'] ?? $key;
1700
1701                         $legend .= Html::element( 'dt',
1702                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1703                         ) . "\n" .
1704                         Html::rawElement( 'dd',
1705                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1706                                 $context->msg( $label )->parse()
1707                         ) . "\n";
1708                 }
1709                 # (+-123)
1710                 $legend .= Html::rawElement( 'dt',
1711                         [ 'class' => 'mw-plusminus-pos' ],
1712                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1713                 ) . "\n";
1714                 $legend .= Html::element(
1715                         'dd',
1716                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1717                         $context->msg( 'recentchanges-label-plusminus' )->text()
1718                 ) . "\n";
1719                 $legend .= Html::closeElement( 'dl' ) . "\n";
1720
1721                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1722                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1723                         $context->msg( 'recentchanges-legend-heading' )->parse();
1724
1725                 # Collapsible
1726                 $collapsedState = $this->getRequest()->getCookie( 'changeslist-state' );
1727                 $collapsedClass = $collapsedState === 'collapsed' ? ' mw-collapsed' : '';
1728
1729                 $legend =
1730                         '<div class="mw-changeslist-legend mw-collapsible' . $collapsedClass . '">' .
1731                                 $legendHeading .
1732                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1733                         '</div>';
1734
1735                 return $legend;
1736         }
1737
1738         /**
1739          * Add page-specific modules.
1740          */
1741         protected function addModules() {
1742                 $out = $this->getOutput();
1743                 // Styles and behavior for the legend box (see makeLegend())
1744                 $out->addModuleStyles( [
1745                         'mediawiki.special.changeslist.legend',
1746                         'mediawiki.special.changeslist',
1747                 ] );
1748                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1749
1750                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
1751                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1752                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1753                 }
1754         }
1755
1756         protected function getGroupName() {
1757                 return 'changes';
1758         }
1759
1760         /**
1761          * Filter on users' experience levels; this will not be called if nothing is
1762          * selected.
1763          *
1764          * @param string $specialPageClassName Class name of current special page
1765          * @param IContextSource $context Context, for e.g. user
1766          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1767          * @param array &$tables Array of tables; see IDatabase::select $table
1768          * @param array &$fields Array of fields; see IDatabase::select $vars
1769          * @param array &$conds Array of conditions; see IDatabase::select $conds
1770          * @param array &$query_options Array of query options; see IDatabase::select $options
1771          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1772          * @param array $selectedExpLevels The allowed active values, sorted
1773          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1774          *   (optional)
1775          */
1776         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1777                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1778         ) {
1779                 global $wgLearnerEdits,
1780                         $wgExperiencedUserEdits,
1781                         $wgLearnerMemberSince,
1782                         $wgExperiencedUserMemberSince;
1783
1784                 $LEVEL_COUNT = 5;
1785
1786                 // If all levels are selected, don't filter
1787                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1788                         return;
1789                 }
1790
1791                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1792                 if (
1793                         in_array( 'registered', $selectedExpLevels ) &&
1794                         in_array( 'unregistered', $selectedExpLevels )
1795                 ) {
1796                         return;
1797                 }
1798
1799                 $actorMigration = ActorMigration::newMigration();
1800                 $actorQuery = $actorMigration->getJoin( 'rc_user' );
1801                 $tables += $actorQuery['tables'];
1802                 $join_conds += $actorQuery['joins'];
1803
1804                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1805                 if (
1806                         in_array( 'registered', $selectedExpLevels ) &&
1807                         !in_array( 'unregistered', $selectedExpLevels )
1808                 ) {
1809                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1810                         return;
1811                 }
1812
1813                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1814                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1815                         return;
1816                 }
1817
1818                 $tables[] = 'user';
1819                 $join_conds['user'] = [ 'LEFT JOIN', $actorQuery['fields']['rc_user'] . ' = user_id' ];
1820
1821                 if ( $now === 0 ) {
1822                         $now = time();
1823                 }
1824                 $secondsPerDay = 86400;
1825                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1826                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1827
1828                 $aboveNewcomer = $dbr->makeList(
1829                         [
1830                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1831                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1832                         ],
1833                         IDatabase::LIST_AND
1834                 );
1835
1836                 $aboveLearner = $dbr->makeList(
1837                         [
1838                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1839                                 'user_registration <= ' .
1840                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1841                         ],
1842                         IDatabase::LIST_AND
1843                 );
1844
1845                 $conditions = [];
1846
1847                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1848                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1849                         $conditions[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1850                 }
1851
1852                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1853                         $conditions[] = "NOT ( $aboveNewcomer )";
1854                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1855                         $conditions[] = $dbr->makeList(
1856                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1857                                 IDatabase::LIST_AND
1858                         );
1859                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1860                         $conditions[] = $aboveLearner;
1861                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1862                         $conditions[] = "NOT ( $aboveLearner )";
1863                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1864                         $conditions[] = $dbr->makeList(
1865                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1866                                 IDatabase::LIST_OR
1867                         );
1868                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1869                         $conditions[] = $aboveNewcomer;
1870                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1871                         $conditions[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1872                 }
1873
1874                 if ( count( $conditions ) > 1 ) {
1875                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1876                 } elseif ( count( $conditions ) === 1 ) {
1877                         $conds[] = reset( $conditions );
1878                 }
1879         }
1880
1881         /**
1882          * Check whether the structured filter UI is enabled
1883          *
1884          * @return bool
1885          */
1886         public function isStructuredFilterUiEnabled() {
1887                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1888                         return true;
1889                 }
1890
1891                 return static::checkStructuredFilterUiEnabled(
1892                         $this->getConfig(),
1893                         $this->getUser()
1894                 );
1895         }
1896
1897         /**
1898          * Check whether the structured filter UI is enabled by default (regardless of
1899          * this particular user's setting)
1900          *
1901          * @return bool
1902          */
1903         public function isStructuredFilterUiEnabledByDefault() {
1904                 if ( $this->getConfig()->get( 'StructuredChangeFiltersShowPreference' ) ) {
1905                         return !$this->getUser()->getDefaultOption( 'rcenhancedfilters-disable' );
1906                 } else {
1907                         return $this->getUser()->getDefaultOption( 'rcenhancedfilters' );
1908                 }
1909         }
1910
1911         /**
1912          * Static method to check whether StructuredFilter UI is enabled for the given user
1913          *
1914          * @since 1.31
1915          * @param Config $config
1916          * @param User $user
1917          * @return bool
1918          */
1919         public static function checkStructuredFilterUiEnabled( Config $config, User $user ) {
1920                 if ( $config->get( 'StructuredChangeFiltersShowPreference' ) ) {
1921                         return !$user->getOption( 'rcenhancedfilters-disable' );
1922                 } else {
1923                         return $user->getOption( 'rcenhancedfilters' );
1924                 }
1925         }
1926
1927         /**
1928          * Get the default value of the number of changes to display when loading
1929          * the result set.
1930          *
1931          * @since 1.30
1932          * @return int
1933          */
1934         public function getDefaultLimit() {
1935                 return $this->getUser()->getIntOption( static::$limitPreferenceName );
1936         }
1937
1938         /**
1939          * Get the default value of the number of days to display when loading
1940          * the result set.
1941          * Supports fractional values, and should be cast to a float.
1942          *
1943          * @since 1.30
1944          * @return float
1945          */
1946         public function getDefaultDays() {
1947                 return floatval( $this->getUser()->getOption( static::$daysPreferenceName ) );
1948         }
1949 }