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 use MediaWiki\MediaWikiServices;
  29
  30 /**
  31  * Special page which uses a ChangesList to show query results.
  32  * @todo Way too many public functions, most of them should be protected
  33  *
  34  * @ingroup SpecialPage
  35  */
  36 abstract class ChangesListSpecialPage extends SpecialPage {
  37         /**
  38          * Maximum length of a tag description in UTF-8 characters.
  39          * Longer descriptions will be truncated.
  40          */
  41         const TAG_DESC_CHARACTER_LIMIT = 120;
  42
  43         /**
  44          * Preference name for saved queries. Subclasses that use saved queries should override this.
  45          * @var string
  46          */
  47         protected static $savedQueriesPreferenceName;
  48
  49         /**
  50          * Preference name for 'days'. Subclasses should override this.
  51          * @var string
  52          */
  53         protected static $daysPreferenceName;
  54
  55         /**
  56          * Preference name for 'limit'. Subclasses should override this.
  57          * @var string
  58          */
  59         protected static $limitPreferenceName;
  60
  61         /**
  62          * Preference name for collapsing the active filter display. Subclasses should override this.
  63          * @var string
  64          */
  65         protected static $collapsedPreferenceName;
  66
  67         /** @var string */
  68         protected $rcSubpage;
  69
  70         /** @var FormOptions */
  71         protected $rcOptions;
  72
  73         // Order of both groups and filters is significant; first is top-most priority,
  74         // descending from there.
  75         // 'showHideSuffix' is a shortcut to and avoid spelling out
  76         // details specific to subclasses here.
  77         /**
  78          * Definition information for the filters and their groups
  79          *
  80          * The value is $groupDefinition, a parameter to the ChangesListFilterGroup constructor.
  81          * However, priority is dynamically added for the core groups, to ease maintenance.
  82          *
  83          * Groups are displayed to the user in the structured UI.  However, if necessary,
  84          * all of the filters in a group can be configured to only display on the
  85          * unstuctured UI, in which case you don't need a group title.
  86          *
  87          * @var array $filterGroupDefinitions
  88          */
  89         private $filterGroupDefinitions;
  90
  91         // Same format as filterGroupDefinitions, but for a single group (reviewStatus)
  92         // that is registered conditionally.
  93         private $legacyReviewStatusFilterGroupDefinition;
  94
  95         // Single filter group registered conditionally
  96         private $reviewStatusFilterGroupDefinition;
  97
  98         // Single filter group registered conditionally
  99         private $hideCategorizationFilterDefinition;
 100
 101         /**
 102          * Filter groups, and their contained filters
 103          * This is an associative array (with group name as key) of ChangesListFilterGroup objects.
 104          *
 105          * @var array $filterGroups
 106          */
 107         protected $filterGroups = [];
 108
 109         public function __construct( $name, $restriction ) {
 110                 parent::__construct( $name, $restriction );
 111
 112                 $nonRevisionTypes = [ RC_LOG ];
 113                 Hooks::run( 'SpecialWatchlistGetNonRevisionTypes', [ &$nonRevisionTypes ] );
 114
 115                 $this->filterGroupDefinitions = [
 116                         [
 117                                 'name' => 'registration',
 118                                 'title' => 'rcfilters-filtergroup-registration',
 119                                 'class' => ChangesListBooleanFilterGroup::class,
 120                                 'filters' => [
 121                                         [
 122                                                 'name' => 'hideliu',
 123                                                 // rcshowhideliu-show, rcshowhideliu-hide,
 124                                                 // wlshowhideliu
 125                                                 'showHideSuffix' => 'showhideliu',
 126                                                 'default' => false,
 127                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 128                                                         &$query_options, &$join_conds
 129                                                 ) {
 130                                                         $actorMigration = ActorMigration::newMigration();
 131                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 132                                                         $tables += $actorQuery['tables'];
 133                                                         $join_conds += $actorQuery['joins'];
 134                                                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
 135                                                 },
 136                                                 'isReplacedInStructuredUi' => true,
 137
 138                                         ],
 139                                         [
 140                                                 'name' => 'hideanons',
 141                                                 // rcshowhideanons-show, rcshowhideanons-hide,
 142                                                 // wlshowhideanons
 143                                                 'showHideSuffix' => 'showhideanons',
 144                                                 'default' => false,
 145                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 146                                                         &$query_options, &$join_conds
 147                                                 ) {
 148                                                         $actorMigration = ActorMigration::newMigration();
 149                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 150                                                         $tables += $actorQuery['tables'];
 151                                                         $join_conds += $actorQuery['joins'];
 152                                                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
 153                                                 },
 154                                                 'isReplacedInStructuredUi' => true,
 155                                         ]
 156                                 ],
 157                         ],
 158
 159                         [
 160                                 'name' => 'userExpLevel',
 161                                 'title' => 'rcfilters-filtergroup-userExpLevel',
 162                                 'class' => ChangesListStringOptionsFilterGroup::class,
 163                                 'isFullCoverage' => true,
 164                                 'filters' => [
 165                                         [
 166                                                 'name' => 'unregistered',
 167                                                 'label' => 'rcfilters-filter-user-experience-level-unregistered-label',
 168                                                 'description' => 'rcfilters-filter-user-experience-level-unregistered-description',
 169                                                 'cssClassSuffix' => 'user-unregistered',
 170                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 171                                                         return !$rc->getAttribute( 'rc_user' );
 172                                                 }
 173                                         ],
 174                                         [
 175                                                 'name' => 'registered',
 176                                                 'label' => 'rcfilters-filter-user-experience-level-registered-label',
 177                                                 'description' => 'rcfilters-filter-user-experience-level-registered-description',
 178                                                 'cssClassSuffix' => 'user-registered',
 179                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 180                                                         return $rc->getAttribute( 'rc_user' );
 181                                                 }
 182                                         ],
 183                                         [
 184                                                 'name' => 'newcomer',
 185                                                 'label' => 'rcfilters-filter-user-experience-level-newcomer-label',
 186                                                 'description' => 'rcfilters-filter-user-experience-level-newcomer-description',
 187                                                 'cssClassSuffix' => 'user-newcomer',
 188                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 189                                                         $performer = $rc->getPerformer();
 190                                                         return $performer && $performer->isLoggedIn() &&
 191                                                                 $performer->getExperienceLevel() === 'newcomer';
 192                                                 }
 193                                         ],
 194                                         [
 195                                                 'name' => 'learner',
 196                                                 'label' => 'rcfilters-filter-user-experience-level-learner-label',
 197                                                 'description' => 'rcfilters-filter-user-experience-level-learner-description',
 198                                                 'cssClassSuffix' => 'user-learner',
 199                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 200                                                         $performer = $rc->getPerformer();
 201                                                         return $performer && $performer->isLoggedIn() &&
 202                                                                 $performer->getExperienceLevel() === 'learner';
 203                                                 },
 204                                         ],
 205                                         [
 206                                                 'name' => 'experienced',
 207                                                 'label' => 'rcfilters-filter-user-experience-level-experienced-label',
 208                                                 'description' => 'rcfilters-filter-user-experience-level-experienced-description',
 209                                                 'cssClassSuffix' => 'user-experienced',
 210                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 211                                                         $performer = $rc->getPerformer();
 212                                                         return $performer && $performer->isLoggedIn() &&
 213                                                                 $performer->getExperienceLevel() === 'experienced';
 214                                                 },
 215                                         ]
 216                                 ],
 217                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 218                                 'queryCallable' => [ $this, 'filterOnUserExperienceLevel' ],
 219                         ],
 220
 221                         [
 222                                 'name' => 'authorship',
 223                                 'title' => 'rcfilters-filtergroup-authorship',
 224                                 'class' => ChangesListBooleanFilterGroup::class,
 225                                 'filters' => [
 226                                         [
 227                                                 'name' => 'hidemyself',
 228                                                 'label' => 'rcfilters-filter-editsbyself-label',
 229                                                 'description' => 'rcfilters-filter-editsbyself-description',
 230                                                 // rcshowhidemine-show, rcshowhidemine-hide,
 231                                                 // wlshowhidemine
 232                                                 'showHideSuffix' => 'showhidemine',
 233                                                 'default' => false,
 234                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 235                                                         &$query_options, &$join_conds
 236                                                 ) {
 237                                                         $actorQuery = ActorMigration::newMigration()->getWhere( $dbr, 'rc_user', $ctx->getUser() );
 238                                                         $tables += $actorQuery['tables'];
 239                                                         $join_conds += $actorQuery['joins'];
 240                                                         $conds[] = 'NOT(' . $actorQuery['conds'] . ')';
 241                                                 },
 242                                                 'cssClassSuffix' => 'self',
 243                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 244                                                         return $ctx->getUser()->equals( $rc->getPerformer() );
 245                                                 },
 246                                         ],
 247                                         [
 248                                                 'name' => 'hidebyothers',
 249                                                 'label' => 'rcfilters-filter-editsbyother-label',
 250                                                 'description' => 'rcfilters-filter-editsbyother-description',
 251                                                 'default' => false,
 252                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 253                                                         &$query_options, &$join_conds
 254                                                 ) {
 255                                                         $actorQuery = ActorMigration::newMigration()
 256                                                                 ->getWhere( $dbr, 'rc_user', $ctx->getUser(), false );
 257                                                         $tables += $actorQuery['tables'];
 258                                                         $join_conds += $actorQuery['joins'];
 259                                                         $conds[] = $actorQuery['conds'];
 260                                                 },
 261                                                 'cssClassSuffix' => 'others',
 262                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 263                                                         return !$ctx->getUser()->equals( $rc->getPerformer() );
 264                                                 },
 265                                         ]
 266                                 ]
 267                         ],
 268
 269                         [
 270                                 'name' => 'automated',
 271                                 'title' => 'rcfilters-filtergroup-automated',
 272                                 'class' => ChangesListBooleanFilterGroup::class,
 273                                 'filters' => [
 274                                         [
 275                                                 'name' => 'hidebots',
 276                                                 'label' => 'rcfilters-filter-bots-label',
 277                                                 'description' => 'rcfilters-filter-bots-description',
 278                                                 // rcshowhidebots-show, rcshowhidebots-hide,
 279                                                 // wlshowhidebots
 280                                                 'showHideSuffix' => 'showhidebots',
 281                                                 'default' => false,
 282                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 283                                                         &$query_options, &$join_conds
 284                                                 ) {
 285                                                         $conds['rc_bot'] = 0;
 286                                                 },
 287                                                 'cssClassSuffix' => 'bot',
 288                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 289                                                         return $rc->getAttribute( 'rc_bot' );
 290                                                 },
 291                                         ],
 292                                         [
 293                                                 'name' => 'hidehumans',
 294                                                 'label' => 'rcfilters-filter-humans-label',
 295                                                 'description' => 'rcfilters-filter-humans-description',
 296                                                 'default' => false,
 297                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 298                                                         &$query_options, &$join_conds
 299                                                 ) {
 300                                                         $conds['rc_bot'] = 1;
 301                                                 },
 302                                                 'cssClassSuffix' => 'human',
 303                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 304                                                         return !$rc->getAttribute( 'rc_bot' );
 305                                                 },
 306                                         ]
 307                                 ]
 308                         ],
 309
 310                         // significance (conditional)
 311
 312                         [
 313                                 'name' => 'significance',
 314                                 'title' => 'rcfilters-filtergroup-significance',
 315                                 'class' => ChangesListBooleanFilterGroup::class,
 316                                 'priority' => -6,
 317                                 'filters' => [
 318                                         [
 319                                                 'name' => 'hideminor',
 320                                                 'label' => 'rcfilters-filter-minor-label',
 321                                                 'description' => 'rcfilters-filter-minor-description',
 322                                                 // rcshowhideminor-show, rcshowhideminor-hide,
 323                                                 // wlshowhideminor
 324                                                 'showHideSuffix' => 'showhideminor',
 325                                                 'default' => false,
 326                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 327                                                         &$query_options, &$join_conds
 328                                                 ) {
 329                                                         $conds[] = 'rc_minor = 0';
 330                                                 },
 331                                                 'cssClassSuffix' => 'minor',
 332                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 333                                                         return $rc->getAttribute( 'rc_minor' );
 334                                                 }
 335                                         ],
 336                                         [
 337                                                 'name' => 'hidemajor',
 338                                                 'label' => 'rcfilters-filter-major-label',
 339                                                 'description' => 'rcfilters-filter-major-description',
 340                                                 'default' => false,
 341                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 342                                                         &$query_options, &$join_conds
 343                                                 ) {
 344                                                         $conds[] = 'rc_minor = 1';
 345                                                 },
 346                                                 'cssClassSuffix' => 'major',
 347                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 348                                                         return !$rc->getAttribute( 'rc_minor' );
 349                                                 }
 350                                         ]
 351                                 ]
 352                         ],
 353
 354                         [
 355                                 'name' => 'lastRevision',
 356                                 'title' => 'rcfilters-filtergroup-lastRevision',
 357                                 'class' => ChangesListBooleanFilterGroup::class,
 358                                 'priority' => -7,
 359                                 'filters' => [
 360                                         [
 361                                                 'name' => 'hidelastrevision',
 362                                                 'label' => 'rcfilters-filter-lastrevision-label',
 363                                                 'description' => 'rcfilters-filter-lastrevision-description',
 364                                                 'default' => false,
 365                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 366                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 367                                                         $conds[] = $dbr->makeList(
 368                                                                 [
 369                                                                         'rc_this_oldid <> page_latest',
 370                                                                         'rc_type' => $nonRevisionTypes,
 371                                                                 ],
 372                                                                 LIST_OR
 373                                                         );
 374                                                 },
 375                                                 'cssClassSuffix' => 'last',
 376                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 377                                                         return $rc->getAttribute( 'rc_this_oldid' ) === $rc->getAttribute( 'page_latest' );
 378                                                 }
 379                                         ],
 380                                         [
 381                                                 'name' => 'hidepreviousrevisions',
 382                                                 'label' => 'rcfilters-filter-previousrevision-label',
 383                                                 'description' => 'rcfilters-filter-previousrevision-description',
 384                                                 'default' => false,
 385                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 386                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 387                                                         $conds[] = $dbr->makeList(
 388                                                                 [
 389                                                                         'rc_this_oldid = page_latest',
 390                                                                         'rc_type' => $nonRevisionTypes,
 391                                                                 ],
 392                                                                 LIST_OR
 393                                                         );
 394                                                 },
 395                                                 'cssClassSuffix' => 'previous',
 396                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 397                                                         return $rc->getAttribute( 'rc_this_oldid' ) !== $rc->getAttribute( 'page_latest' );
 398                                                 }
 399                                         ]
 400                                 ]
 401                         ],
 402
 403                         // With extensions, there can be change types that will not be hidden by any of these.
 404                         [
 405                                 'name' => 'changeType',
 406                                 'title' => 'rcfilters-filtergroup-changetype',
 407                                 'class' => ChangesListBooleanFilterGroup::class,
 408                                 'priority' => -8,
 409                                 'filters' => [
 410                                         [
 411                                                 'name' => 'hidepageedits',
 412                                                 'label' => 'rcfilters-filter-pageedits-label',
 413                                                 'description' => 'rcfilters-filter-pageedits-description',
 414                                                 'default' => false,
 415                                                 'priority' => -2,
 416                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 417                                                         &$query_options, &$join_conds
 418                                                 ) {
 419                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_EDIT );
 420                                                 },
 421                                                 'cssClassSuffix' => 'src-mw-edit',
 422                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 423                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_EDIT;
 424                                                 },
 425                                         ],
 426                                         [
 427                                                 'name' => 'hidenewpages',
 428                                                 'label' => 'rcfilters-filter-newpages-label',
 429                                                 'description' => 'rcfilters-filter-newpages-description',
 430                                                 'default' => false,
 431                                                 'priority' => -3,
 432                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 433                                                         &$query_options, &$join_conds
 434                                                 ) {
 435                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_NEW );
 436                                                 },
 437                                                 'cssClassSuffix' => 'src-mw-new',
 438                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 439                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_NEW;
 440                                                 },
 441                                         ],
 442
 443                                         // hidecategorization
 444
 445                                         [
 446                                                 'name' => 'hidelog',
 447                                                 'label' => 'rcfilters-filter-logactions-label',
 448                                                 'description' => 'rcfilters-filter-logactions-description',
 449                                                 'default' => false,
 450                                                 'priority' => -5,
 451                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 452                                                         &$query_options, &$join_conds
 453                                                 ) {
 454                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_LOG );
 455                                                 },
 456                                                 'cssClassSuffix' => 'src-mw-log',
 457                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 458                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_LOG;
 459                                                 }
 460                                         ],
 461                                 ],
 462                         ],
 463
 464                 ];
 465
 466                 $this->legacyReviewStatusFilterGroupDefinition = [
 467                         [
 468                                 'name' => 'legacyReviewStatus',
 469                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 470                                 'class' => ChangesListBooleanFilterGroup::class,
 471                                 'filters' => [
 472                                         [
 473                                                 'name' => 'hidepatrolled',
 474                                                 // rcshowhidepatr-show, rcshowhidepatr-hide
 475                                                 // wlshowhidepatr
 476                                                 'showHideSuffix' => 'showhidepatr',
 477                                                 'default' => false,
 478                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 479                                                         &$query_options, &$join_conds
 480                                                 ) {
 481                                                         $conds['rc_patrolled'] = RecentChange::PRC_UNPATROLLED;
 482                                                 },
 483                                                 'isReplacedInStructuredUi' => true,
 484                                         ],
 485                                         [
 486                                                 'name' => 'hideunpatrolled',
 487                                                 'default' => false,
 488                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 489                                                         &$query_options, &$join_conds
 490                                                 ) {
 491                                                         $conds[] = 'rc_patrolled != ' . RecentChange::PRC_UNPATROLLED;
 492                                                 },
 493                                                 'isReplacedInStructuredUi' => true,
 494                                         ],
 495                                 ],
 496                         ]
 497                 ];
 498
 499                 $this->reviewStatusFilterGroupDefinition = [
 500                         [
 501                                 'name' => 'reviewStatus',
 502                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 503                                 'class' => ChangesListStringOptionsFilterGroup::class,
 504                                 'isFullCoverage' => true,
 505                                 'priority' => -5,
 506                                 'filters' => [
 507                                         [
 508                                                 'name' => 'unpatrolled',
 509                                                 'label' => 'rcfilters-filter-reviewstatus-unpatrolled-label',
 510                                                 'description' => 'rcfilters-filter-reviewstatus-unpatrolled-description',
 511                                                 'cssClassSuffix' => 'reviewstatus-unpatrolled',
 512                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 513                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_UNPATROLLED;
 514                                                 },
 515                                         ],
 516                                         [
 517                                                 'name' => 'manual',
 518                                                 'label' => 'rcfilters-filter-reviewstatus-manual-label',
 519                                                 'description' => 'rcfilters-filter-reviewstatus-manual-description',
 520                                                 'cssClassSuffix' => 'reviewstatus-manual',
 521                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 522                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_PATROLLED;
 523                                                 },
 524                                         ],
 525                                         [
 526                                                 'name' => 'auto',
 527                                                 'label' => 'rcfilters-filter-reviewstatus-auto-label',
 528                                                 'description' => 'rcfilters-filter-reviewstatus-auto-description',
 529                                                 'cssClassSuffix' => 'reviewstatus-auto',
 530                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 531                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_AUTOPATROLLED;
 532                                                 },
 533                                         ],
 534                                 ],
 535                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 536                                 'queryCallable' => function ( $specialPageClassName, $ctx, $dbr,
 537                                         &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selected
 538                                 ) {
 539                                         if ( $selected === [] ) {
 540                                                 return;
 541                                         }
 542                                         $rcPatrolledValues = [
 543                                                 'unpatrolled' => RecentChange::PRC_UNPATROLLED,
 544                                                 'manual' => RecentChange::PRC_PATROLLED,
 545                                                 'auto' => RecentChange::PRC_AUTOPATROLLED,
 546                                         ];
 547                                         // e.g. rc_patrolled IN (0, 2)
 548                                         $conds['rc_patrolled'] = array_map( function ( $s ) use ( $rcPatrolledValues ) {
 549                                                 return $rcPatrolledValues[ $s ];
 550                                         }, $selected );
 551                                 }
 552                         ]
 553                 ];
 554
 555                 $this->hideCategorizationFilterDefinition = [
 556                         'name' => 'hidecategorization',
 557                         'label' => 'rcfilters-filter-categorization-label',
 558                         'description' => 'rcfilters-filter-categorization-description',
 559                         // rcshowhidecategorization-show, rcshowhidecategorization-hide.
 560                         // wlshowhidecategorization
 561                         'showHideSuffix' => 'showhidecategorization',
 562                         'default' => false,
 563                         'priority' => -4,
 564                         'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 565                                 &$query_options, &$join_conds
 566                         ) {
 567                                 $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 568                         },
 569                         'cssClassSuffix' => 'src-mw-categorize',
 570                         'isRowApplicableCallable' => function ( $ctx, $rc ) {
 571                                 return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_CATEGORIZE;
 572                         },
 573                 ];
 574         }
 575
 576         /**
 577          * Check if filters are in conflict and guaranteed to return no results.
 578          *
 579          * @return bool
 580          */
 581         protected function areFiltersInConflict() {
 582                 $opts = $this->getOptions();
 583                 /** @var ChangesListFilterGroup $group */
 584                 foreach ( $this->getFilterGroups() as $group ) {
 585                         if ( $group->getConflictingGroups() ) {
 586                                 wfLogWarning(
 587                                         $group->getName() .
 588                                         " specifies conflicts with other groups but these are not supported yet."
 589                                 );
 590                         }
 591
 592                         /** @var ChangesListFilter $conflictingFilter */
 593                         foreach ( $group->getConflictingFilters() as $conflictingFilter ) {
 594                                 if ( $conflictingFilter->activelyInConflictWithGroup( $group, $opts ) ) {
 595                                         return true;
 596                                 }
 597                         }
 598
 599                         /** @var ChangesListFilter $filter */
 600                         foreach ( $group->getFilters() as $filter ) {
 601                                 /** @var ChangesListFilter $conflictingFilter */
 602                                 foreach ( $filter->getConflictingFilters() as $conflictingFilter ) {
 603                                         if (
 604                                                 $conflictingFilter->activelyInConflictWithFilter( $filter, $opts ) &&
 605                                                 $filter->activelyInConflictWithFilter( $conflictingFilter, $opts )
 606                                         ) {
 607                                                 return true;
 608                                         }
 609                                 }
 610
 611                         }
 612
 613                 }
 614
 615                 return false;
 616         }
 617
 618         /**
 619          * Main execution point
 620          *
 621          * @param string $subpage
 622          */
 623         public function execute( $subpage ) {
 624                 $this->rcSubpage = $subpage;
 625
 626                 $this->considerActionsForDefaultSavedQuery( $subpage );
 627
 628                 $opts = $this->getOptions();
 629                 try {
 630                         $rows = $this->getRows();
 631                         if ( $rows === false ) {
 632                                 $rows = new FakeResultWrapper( [] );
 633                         }
 634
 635                         // Used by Structured UI app to get results without MW chrome
 636                         if ( $this->getRequest()->getVal( 'action' ) === 'render' ) {
 637                                 $this->getOutput()->setArticleBodyOnly( true );
 638                         }
 639
 640                         // Used by "live update" and "view newest" to check
 641                         // if there's new changes with minimal data transfer
 642                         if ( $this->getRequest()->getBool( 'peek' ) ) {
 643                                 $code = $rows->numRows() > 0 ? 200 : 204;
 644                                 $this->getOutput()->setStatusCode( $code );
 645
 646                                 if ( $this->getUser()->isAnon() !==
 647                                         $this->getRequest()->getFuzzyBool( 'isAnon' )
 648                                 ) {
 649                                         $this->getOutput()->setStatusCode( 205 );
 650                                 }
 651
 652                                 return;
 653                         }
 654
 655                         $batch = new LinkBatch;
 656                         foreach ( $rows as $row ) {
 657                                 $batch->add( NS_USER, $row->rc_user_text );
 658                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 659                                 $batch->add( $row->rc_namespace, $row->rc_title );
 660                                 if ( $row->rc_source === RecentChange::SRC_LOG ) {
 661                                         $formatter = LogFormatter::newFromRow( $row );
 662                                         foreach ( $formatter->getPreloadTitles() as $title ) {
 663                                                 $batch->addObj( $title );
 664                                         }
 665                                 }
 666                         }
 667                         $batch->execute();
 668
 669                         $this->setHeaders();
 670                         $this->outputHeader();
 671                         $this->addModules();
 672                         $this->webOutput( $rows, $opts );
 673
 674                         $rows->free();
 675                 } catch ( DBQueryTimeoutError $timeoutException ) {
 676                         MWExceptionHandler::logException( $timeoutException );
 677
 678                         $this->setHeaders();
 679                         $this->outputHeader();
 680                         $this->addModules();
 681
 682                         $this->getOutput()->setStatusCode( 500 );
 683                         $this->webOutputHeader( 0, $opts );
 684                         $this->outputTimeout();
 685                 }
 686
 687                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 688                         // Clean up any bad page entries for titles showing up in RC
 689                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 690                                 $this->getDB(),
 691                                 LoggerFactory::getInstance( 'objectcache' )
 692                         ) );
 693                 }
 694
 695                 $this->includeRcFiltersApp();
 696         }
 697
 698         /**
 699          * Check whether or not the page should load defaults, and if so, whether
 700          * a default saved query is relevant to be redirected to. If it is relevant,
 701          * redirect properly with all necessary query parameters.
 702          *
 703          * @param string $subpage
 704          */
 705         protected function considerActionsForDefaultSavedQuery( $subpage ) {
 706                 if ( !$this->isStructuredFilterUiEnabled() || $this->including() ) {
 707                         return;
 708                 }
 709
 710                 $knownParams = $this->getRequest()->getValues(
 711                         ...array_keys( $this->getOptions()->getAllValues() )
 712                 );
 713
 714                 // HACK: Temporarily until we can properly define "sticky" filters and parameters,
 715                 // we need to exclude several parameters we know should not be counted towards preventing
 716                 // the loading of defaults.
 717                 $excludedParams = [ 'limit' => '', 'days' => '', 'enhanced' => '', 'from' => '' ];
 718                 $knownParams = array_diff_key( $knownParams, $excludedParams );
 719
 720                 if (
 721                         // If there are NO known parameters in the URL request
 722                         // (that are not excluded) then we need to check into loading
 723                         // the default saved query
 724                         count( $knownParams ) === 0
 725                 ) {
 726                         // Get the saved queries data and parse it
 727                         $savedQueries = FormatJson::decode(
 728                                 $this->getUser()->getOption( static::$savedQueriesPreferenceName ),
 729                                 true
 730                         );
 731
 732                         if ( $savedQueries && isset( $savedQueries[ 'default' ] ) ) {
 733                                 // Only load queries that are 'version' 2, since those
 734                                 // have parameter representation
 735                                 if ( isset( $savedQueries[ 'version' ] ) && $savedQueries[ 'version' ] === '2' ) {
 736                                         $savedQueryDefaultID = $savedQueries[ 'default' ];
 737                                         $defaultQuery = $savedQueries[ 'queries' ][ $savedQueryDefaultID ][ 'data' ];
 738
 739                                         // Build the entire parameter list
 740                                         $query = array_merge(
 741                                                 $defaultQuery[ 'params' ],
 742                                                 $defaultQuery[ 'highlights' ],
 743                                                 [
 744                                                         'urlversion' => '2',
 745                                                 ]
 746                                         );
 747                                         // Add to the query any parameters that we may have ignored before
 748                                         // but are still valid and requested in the URL
 749                                         $query = array_merge( $this->getRequest()->getValues(), $query );
 750                                         unset( $query[ 'title' ] );
 751                                         $this->getOutput()->redirect( $this->getPageTitle( $subpage )->getCanonicalURL( $query ) );
 752                                 } else {
 753                                         // There's a default, but the version is not 2, and the server can't
 754                                         // actually recognize the query itself. This happens if it is before
 755                                         // the conversion, so we need to tell the UI to reload saved query as
 756                                         // it does the conversion to version 2
 757                                         $this->getOutput()->addJsConfigVars(
 758                                                 'wgStructuredChangeFiltersDefaultSavedQueryExists',
 759                                                 true
 760                                         );
 761
 762                                         // Add the class that tells the frontend it is still loading
 763                                         // another query
 764                                         $this->getOutput()->addBodyClasses( 'mw-rcfilters-ui-loading' );
 765                                 }
 766                         }
 767                 }
 768         }
 769
 770         /**
 771          * Include the modules and configuration for the RCFilters app.
 772          * Conditional on the user having the feature enabled.
 773          *
 774          * If it is disabled, add a <body> class marking that
 775          */
 776         protected function includeRcFiltersApp() {
 777                 $out = $this->getOutput();
 778                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
 779                         $jsData = $this->getStructuredFilterJsData();
 780                         $messages = [];
 781                         foreach ( $jsData['messageKeys'] as $key ) {
 782                                 $messages[$key] = $this->msg( $key )->plain();
 783                         }
 784
 785                         $out->addBodyClasses( 'mw-rcfilters-enabled' );
 786                         $collapsed = $this->getUser()->getBoolOption( static::$collapsedPreferenceName );
 787                         if ( $collapsed ) {
 788                                 $out->addBodyClasses( 'mw-rcfilters-collapsed' );
 789                         }
 790
 791                         // These config and message exports should be moved into a ResourceLoader data module (T201574)
 792                         $out->addJsConfigVars( 'wgStructuredChangeFilters', $jsData['groups'] );
 793                         $out->addJsConfigVars( 'wgStructuredChangeFiltersMessages', $messages );
 794                         $out->addJsConfigVars( 'wgStructuredChangeFiltersCollapsedState', $collapsed );
 795
 796                         $out->addJsConfigVars(
 797                                 'StructuredChangeFiltersDisplayConfig',
 798                                 [
 799                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 800                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 801                                         'limitDefault' => $this->getDefaultLimit(),
 802                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 803                                         'daysDefault' => $this->getDefaultDays(),
 804                                 ]
 805                         );
 806
 807                         $out->addJsConfigVars(
 808                                 'wgStructuredChangeFiltersSavedQueriesPreferenceName',
 809                                 static::$savedQueriesPreferenceName
 810                         );
 811                         $out->addJsConfigVars(
 812                                 'wgStructuredChangeFiltersLimitPreferenceName',
 813                                 static::$limitPreferenceName
 814                         );
 815                         $out->addJsConfigVars(
 816                                 'wgStructuredChangeFiltersDaysPreferenceName',
 817                                 static::$daysPreferenceName
 818                         );
 819                         $out->addJsConfigVars(
 820                                 'wgStructuredChangeFiltersCollapsedPreferenceName',
 821                                 static::$collapsedPreferenceName
 822                         );
 823                 } else {
 824                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 825                 }
 826         }
 827
 828         /**
 829          * Get config vars to export with the mediawiki.rcfilters.filters.ui module.
 830          *
 831          * @param ResourceLoaderContext $context
 832          * @return array
 833          */
 834         public static function getRcFiltersConfigVars( ResourceLoaderContext $context ) {
 835                 return [
 836                         'RCFiltersChangeTags' => self::getChangeTagList( $context ),
 837                         'StructuredChangeFiltersEditWatchlistUrl' =>
 838                                 SpecialPage::getTitleFor( 'EditWatchlist' )->getLocalURL()
 839                 ];
 840         }
 841
 842         /**
 843          * Fetch the change tags list for the front end
 844          *
 845          * @param ResourceLoaderContext $context
 846          * @return array Tag data
 847          */
 848         protected static function getChangeTagList( ResourceLoaderContext $context ) {
 849                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 850                 return $cache->getWithSetCallback(
 851                         $cache->makeKey( 'changeslistspecialpage-changetags', $context->getLanguage() ),
 852                         $cache::TTL_MINUTE * 10,
 853                         function () use ( $context ) {
 854                                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 855                                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 856
 857                                 $tagStats = ChangeTags::tagUsageStatistics();
 858                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 859
 860                                 // Sort by hits (disabled for now)
 861                                 //arsort( $tagHitCounts );
 862
 863                                 // HACK work around ChangeTags::truncateTagDescription() requiring a RequestContext
 864                                 $fakeContext = RequestContext::newExtraneousContext( Title::newFromText( 'Dwimmerlaik' ) );
 865                                 $fakeContext->setLanguage( Language::factory( $context->getLanguage() ) );
 866
 867                                 // Build the list and data
 868                                 $result = [];
 869                                 foreach ( $tagHitCounts as $tagName => $hits ) {
 870                                         if (
 871                                                 (
 872                                                         // Only get active tags
 873                                                         isset( $explicitlyDefinedTags[ $tagName ] ) ||
 874                                                         isset( $softwareActivatedTags[ $tagName ] )
 875                                                 ) &&
 876                                                 // Only get tags with more than 0 hits
 877                                                 $hits > 0
 878                                         ) {
 879                                                 $result[] = [
 880                                                         'name' => $tagName,
 881                                                         'label' => Sanitizer::stripAllTags(
 882                                                                 ChangeTags::tagDescription( $tagName, $context )
 883                                                         ),
 884                                                         'description' =>
 885                                                                 ChangeTags::truncateTagDescription(
 886                                                                         $tagName,
 887                                                                         self::TAG_DESC_CHARACTER_LIMIT,
 888                                                                         $fakeContext
 889                                                                 ),
 890                                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 891                                                         'hits' => $hits,
 892                                                 ];
 893                                         }
 894                                 }
 895
 896                                 // Instead of sorting by hit count (disabled, see above), sort by display name
 897                                 usort( $result, function ( $a, $b ) {
 898                                         return strcasecmp( $a['label'], $b['label'] );
 899                                 } );
 900
 901                                 return $result;
 902                         },
 903                         [
 904                                 'lockTSE' => 30
 905                         ]
 906                 );
 907         }
 908
 909         /**
 910          * Add the "no results" message to the output
 911          */
 912         protected function outputNoResults() {
 913                 $this->getOutput()->addHTML(
 914                         '<div class="mw-changeslist-empty">' .
 915                         $this->msg( 'recentchanges-noresult' )->parse() .
 916                         '</div>'
 917                 );
 918         }
 919
 920         /**
 921          * Add the "timeout" message to the output
 922          */
 923         protected function outputTimeout() {
 924                 $this->getOutput()->addHTML(
 925                         '<div class="mw-changeslist-empty mw-changeslist-timeout">' .
 926                         $this->msg( 'recentchanges-timeout' )->parse() .
 927                         '</div>'
 928                 );
 929         }
 930
 931         /**
 932          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 933          *
 934          * @return bool|IResultWrapper Result or false
 935          */
 936         public function getRows() {
 937                 $opts = $this->getOptions();
 938
 939                 $tables = [];
 940                 $fields = [];
 941                 $conds = [];
 942                 $query_options = [];
 943                 $join_conds = [];
 944                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 945
 946                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 947         }
 948
 949         /**
 950          * Get the current FormOptions for this request
 951          *
 952          * @return FormOptions
 953          */
 954         public function getOptions() {
 955                 if ( $this->rcOptions === null ) {
 956                         $this->rcOptions = $this->setup( $this->rcSubpage );
 957                 }
 958
 959                 return $this->rcOptions;
 960         }
 961
 962         /**
 963          * Register all filters and their groups (including those from hooks), plus handle
 964          * conflicts and defaults.
 965          *
 966          * You might want to customize these in the same method, in subclasses.  You can
 967          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 968          * filter, then make necessary modfications to the filter or group (e.g. with
 969          * setDefault).
 970          */
 971         protected function registerFilters() {
 972                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 973
 974                 // Make sure this is not being transcluded (we don't want to show this
 975                 // information to all users just because the user that saves the edit can
 976                 // patrol or is logged in)
 977                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 978                         $this->registerFiltersFromDefinitions( $this->legacyReviewStatusFilterGroupDefinition );
 979                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 980                 }
 981
 982                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 983
 984                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 985                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 986                                 $this->hideCategorizationFilterDefinition
 987                         );
 988
 989                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 990
 991                         $hideCategorization = new ChangesListBooleanFilter(
 992                                 $transformedHideCategorizationDef
 993                         );
 994                 }
 995
 996                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 997
 998                 $this->registerFiltersFromDefinitions( [] );
 999
1000                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
1001                 $registered = $userExperienceLevel->getFilter( 'registered' );
1002                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
1003                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
1004                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
1005
1006                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
1007                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
1008                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
1009
1010                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
1011                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
1012
1013                 // categoryFilter is conditional; see registerFilters
1014                 if ( $categoryFilter !== null ) {
1015                         $hideMinorFilter->conflictsWith(
1016                                 $categoryFilter,
1017                                 'rcfilters-hideminor-conflicts-typeofchange-global',
1018                                 'rcfilters-hideminor-conflicts-typeofchange',
1019                                 'rcfilters-typeofchange-conflicts-hideminor'
1020                         );
1021                 }
1022                 $hideMinorFilter->conflictsWith(
1023                         $logactionsFilter,
1024                         'rcfilters-hideminor-conflicts-typeofchange-global',
1025                         'rcfilters-hideminor-conflicts-typeofchange',
1026                         'rcfilters-typeofchange-conflicts-hideminor'
1027                 );
1028                 $hideMinorFilter->conflictsWith(
1029                         $pagecreationFilter,
1030                         'rcfilters-hideminor-conflicts-typeofchange-global',
1031                         'rcfilters-hideminor-conflicts-typeofchange',
1032                         'rcfilters-typeofchange-conflicts-hideminor'
1033                 );
1034         }
1035
1036         /**
1037          * Transforms filter definition to prepare it for constructor.
1038          *
1039          * See overrides of this method as well.
1040          *
1041          * @param array $filterDefinition Original filter definition
1042          *
1043          * @return array Transformed definition
1044          */
1045         protected function transformFilterDefinition( array $filterDefinition ) {
1046                 return $filterDefinition;
1047         }
1048
1049         /**
1050          * Register filters from a definition object
1051          *
1052          * Array specifying groups and their filters; see Filter and
1053          * ChangesListFilterGroup constructors.
1054          *
1055          * There is light processing to simplify core maintenance.
1056          * @param array $definition
1057          */
1058         protected function registerFiltersFromDefinitions( array $definition ) {
1059                 $autoFillPriority = -1;
1060                 foreach ( $definition as $groupDefinition ) {
1061                         if ( !isset( $groupDefinition['priority'] ) ) {
1062                                 $groupDefinition['priority'] = $autoFillPriority;
1063                         } else {
1064                                 // If it's explicitly specified, start over the auto-fill
1065                                 $autoFillPriority = $groupDefinition['priority'];
1066                         }
1067
1068                         $autoFillPriority--;
1069
1070                         $className = $groupDefinition['class'];
1071                         unset( $groupDefinition['class'] );
1072
1073                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
1074                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
1075                         }
1076
1077                         $this->registerFilterGroup( new $className( $groupDefinition ) );
1078                 }
1079         }
1080
1081         /**
1082          * @return array The legacy show/hide toggle filters
1083          */
1084         protected function getLegacyShowHideFilters() {
1085                 $filters = [];
1086                 foreach ( $this->filterGroups as $group ) {
1087                         if ( $group instanceof  ChangesListBooleanFilterGroup ) {
1088                                 foreach ( $group->getFilters() as $key => $filter ) {
1089                                         if ( $filter->displaysOnUnstructuredUi( $this ) ) {
1090                                                 $filters[ $key ] = $filter;
1091                                         }
1092                                 }
1093                         }
1094                 }
1095                 return $filters;
1096         }
1097
1098         /**
1099          * Register all the filters, including legacy hook-driven ones.
1100          * Then create a FormOptions object with options as specified by the user
1101          *
1102          * @param array $parameters
1103          *
1104          * @return FormOptions
1105          */
1106         public function setup( $parameters ) {
1107                 $this->registerFilters();
1108
1109                 $opts = $this->getDefaultOptions();
1110
1111                 $opts = $this->fetchOptionsFromRequest( $opts );
1112
1113                 // Give precedence to subpage syntax
1114                 if ( $parameters !== null ) {
1115                         $this->parseParameters( $parameters, $opts );
1116                 }
1117
1118                 $this->validateOptions( $opts );
1119
1120                 return $opts;
1121         }
1122
1123         /**
1124          * Get a FormOptions object containing the default options. By default, returns
1125          * some basic options.  The filters listed explicitly here are overriden in this
1126          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
1127          * and more) are structured.  Structured filters are overriden in registerFilters.
1128          * not here.
1129          *
1130          * @return FormOptions
1131          */
1132         public function getDefaultOptions() {
1133                 $opts = new FormOptions();
1134                 $structuredUI = $this->isStructuredFilterUiEnabled();
1135                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
1136                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
1137
1138                 /** @var ChangesListFilterGroup $filterGroup */
1139                 foreach ( $this->filterGroups as $filterGroup ) {
1140                         $filterGroup->addOptions( $opts, $useDefaults, $structuredUI );
1141                 }
1142
1143                 $opts->add( 'namespace', '', FormOptions::STRING );
1144                 $opts->add( 'invert', false );
1145                 $opts->add( 'associated', false );
1146                 $opts->add( 'urlversion', 1 );
1147                 $opts->add( 'tagfilter', '' );
1148
1149                 $opts->add( 'days', $this->getDefaultDays(), FormOptions::FLOAT );
1150                 $opts->add( 'limit', $this->getDefaultLimit(), FormOptions::INT );
1151
1152                 $opts->add( 'from', '' );
1153
1154                 return $opts;
1155         }
1156
1157         /**
1158          * Register a structured changes list filter group
1159          *
1160          * @param ChangesListFilterGroup $group
1161          */
1162         public function registerFilterGroup( ChangesListFilterGroup $group ) {
1163                 $groupName = $group->getName();
1164
1165                 $this->filterGroups[$groupName] = $group;
1166         }
1167
1168         /**
1169          * Gets the currently registered filters groups
1170          *
1171          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
1172          */
1173         protected function getFilterGroups() {
1174                 return $this->filterGroups;
1175         }
1176
1177         /**
1178          * Gets a specified ChangesListFilterGroup by name
1179          *
1180          * @param string $groupName Name of group
1181          *
1182          * @return ChangesListFilterGroup|null Group, or null if not registered
1183          */
1184         public function getFilterGroup( $groupName ) {
1185                 return $this->filterGroups[$groupName] ?? null;
1186         }
1187
1188         // Currently, this intentionally only includes filters that display
1189         // in the structured UI.  This can be changed easily, though, if we want
1190         // to include data on filters that use the unstructured UI.  messageKeys is a
1191         // special top-level value, with the value being an array of the message keys to
1192         // send to the client.
1193         /**
1194          * Gets structured filter information needed by JS
1195          *
1196          * @return array Associative array
1197          * * array $return['groups'] Group data
1198          * * array $return['messageKeys'] Array of message keys
1199          */
1200         public function getStructuredFilterJsData() {
1201                 $output = [
1202                         'groups' => [],
1203                         'messageKeys' => [],
1204                 ];
1205
1206                 usort( $this->filterGroups, function ( $a, $b ) {
1207                         return $b->getPriority() <=> $a->getPriority();
1208                 } );
1209
1210                 foreach ( $this->filterGroups as $groupName => $group ) {
1211                         $groupOutput = $group->getJsData( $this );
1212                         if ( $groupOutput !== null ) {
1213                                 $output['messageKeys'] = array_merge(
1214                                         $output['messageKeys'],
1215                                         $groupOutput['messageKeys']
1216                                 );
1217
1218                                 unset( $groupOutput['messageKeys'] );
1219                                 $output['groups'][] = $groupOutput;
1220                         }
1221                 }
1222
1223                 return $output;
1224         }
1225
1226         /**
1227          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1228          *
1229          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1230          *
1231          * @param FormOptions $opts
1232          * @return FormOptions
1233          */
1234         protected function fetchOptionsFromRequest( $opts ) {
1235                 $opts->fetchValuesFromRequest( $this->getRequest() );
1236
1237                 return $opts;
1238         }
1239
1240         /**
1241          * Process $par and put options found in $opts. Used when including the page.
1242          *
1243          * @param string $par
1244          * @param FormOptions $opts
1245          */
1246         public function parseParameters( $par, FormOptions $opts ) {
1247                 $stringParameterNameSet = [];
1248                 $hideParameterNameSet = [];
1249
1250                 // URL parameters can be per-group, like 'userExpLevel',
1251                 // or per-filter, like 'hideminor'.
1252
1253                 foreach ( $this->filterGroups as $filterGroup ) {
1254                         if ( $filterGroup instanceof ChangesListStringOptionsFilterGroup ) {
1255                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1256                         } elseif ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1257                                 foreach ( $filterGroup->getFilters() as $filter ) {
1258                                         $hideParameterNameSet[$filter->getName()] = true;
1259                                 }
1260                         }
1261                 }
1262
1263                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1264                 foreach ( $bits as $bit ) {
1265                         $m = [];
1266                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1267                                 // hidefoo => hidefoo=true
1268                                 $opts[$bit] = true;
1269                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1270                                 // foo => hidefoo=false
1271                                 $opts["hide$bit"] = false;
1272                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1273                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1274                                         $opts[$m[1]] = $m[2];
1275                                 }
1276                         }
1277                 }
1278         }
1279
1280         /**
1281          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1282          *
1283          * @param FormOptions $opts
1284          */
1285         public function validateOptions( FormOptions $opts ) {
1286                 $isContradictory = $this->fixContradictoryOptions( $opts );
1287                 $isReplaced = $this->replaceOldOptions( $opts );
1288
1289                 if ( $isContradictory || $isReplaced ) {
1290                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1291                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1292                 }
1293
1294                 $opts->validateIntBounds( 'limit', 0, 5000 );
1295                 $opts->validateBounds( 'days', 0, $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
1296         }
1297
1298         /**
1299          * Fix invalid options by resetting pairs that should never appear together.
1300          *
1301          * @param FormOptions $opts
1302          * @return bool True if any option was reset
1303          */
1304         private function fixContradictoryOptions( FormOptions $opts ) {
1305                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1306
1307                 foreach ( $this->filterGroups as $filterGroup ) {
1308                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1309                                 $filters = $filterGroup->getFilters();
1310
1311                                 if ( count( $filters ) === 1 ) {
1312                                         // legacy boolean filters should not be considered
1313                                         continue;
1314                                 }
1315
1316                                 $allInGroupEnabled = array_reduce(
1317                                         $filters,
1318                                         function ( $carry, $filter ) use ( $opts ) {
1319                                                 return $carry && $opts[ $filter->getName() ];
1320                                         },
1321                                         /* initialValue */ count( $filters ) > 0
1322                                 );
1323
1324                                 if ( $allInGroupEnabled ) {
1325                                         foreach ( $filters as $filter ) {
1326                                                 $opts[ $filter->getName() ] = false;
1327                                         }
1328
1329                                         $fixed = true;
1330                                 }
1331                         }
1332                 }
1333
1334                 return $fixed;
1335         }
1336
1337         /**
1338          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1339          * compatibility.
1340          *
1341          * This is deprecated and may be removed.
1342          *
1343          * @param FormOptions $opts
1344          * @return bool True if this change was mode
1345          */
1346         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1347                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1348                         $opts->reset( 'hideanons' );
1349                         if ( !$opts['hidebots'] ) {
1350                                 $opts->reset( 'hideliu' );
1351                                 $opts['hidehumans'] = 1;
1352                         }
1353
1354                         return true;
1355                 }
1356
1357                 return false;
1358         }
1359
1360         /**
1361          * Replace old options with their structured UI equivalents
1362          *
1363          * @param FormOptions $opts
1364          * @return bool True if the change was made
1365          */
1366         public function replaceOldOptions( FormOptions $opts ) {
1367                 if ( !$this->isStructuredFilterUiEnabled() ) {
1368                         return false;
1369                 }
1370
1371                 $changed = false;
1372
1373                 // At this point 'hideanons' and 'hideliu' cannot be both true,
1374                 // because fixBackwardsCompatibilityOptions resets (at least) 'hideanons' in such case
1375                 if ( $opts[ 'hideanons' ] ) {
1376                         $opts->reset( 'hideanons' );
1377                         $opts[ 'userExpLevel' ] = 'registered';
1378                         $changed = true;
1379                 }
1380
1381                 if ( $opts[ 'hideliu' ] ) {
1382                         $opts->reset( 'hideliu' );
1383                         $opts[ 'userExpLevel' ] = 'unregistered';
1384                         $changed = true;
1385                 }
1386
1387                 if ( $this->getFilterGroup( 'legacyReviewStatus' ) ) {
1388                         if ( $opts[ 'hidepatrolled' ] ) {
1389                                 $opts->reset( 'hidepatrolled' );
1390                                 $opts[ 'reviewStatus' ] = 'unpatrolled';
1391                                 $changed = true;
1392                         }
1393
1394                         if ( $opts[ 'hideunpatrolled' ] ) {
1395                                 $opts->reset( 'hideunpatrolled' );
1396                                 $opts[ 'reviewStatus' ] = implode(
1397                                         ChangesListStringOptionsFilterGroup::SEPARATOR,
1398                                         [ 'manual', 'auto' ]
1399                                 );
1400                                 $changed = true;
1401                         }
1402                 }
1403
1404                 return $changed;
1405         }
1406
1407         /**
1408          * Convert parameters values from true/false to 1/0
1409          * so they are not omitted by wfArrayToCgi()
1410          * T38524
1411          *
1412          * @param array $params
1413          * @return array
1414          */
1415         protected function convertParamsForLink( $params ) {
1416                 foreach ( $params as &$value ) {
1417                         if ( $value === false ) {
1418                                 $value = '0';
1419                         }
1420                 }
1421                 unset( $value );
1422                 return $params;
1423         }
1424
1425         /**
1426          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1427          * the user requested.
1428          *
1429          * @param array &$tables Array of tables; see IDatabase::select $table
1430          * @param array &$fields Array of fields; see IDatabase::select $vars
1431          * @param array &$conds Array of conditions; see IDatabase::select $conds
1432          * @param array &$query_options Array of query options; see IDatabase::select $options
1433          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1434          * @param FormOptions $opts
1435          */
1436         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1437                 &$join_conds, FormOptions $opts
1438         ) {
1439                 $dbr = $this->getDB();
1440                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1441
1442                 /** @var ChangesListFilterGroup $filterGroup */
1443                 foreach ( $this->filterGroups as $filterGroup ) {
1444                         $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1445                                 $query_options, $join_conds, $opts, $isStructuredUI );
1446                 }
1447
1448                 // Namespace filtering
1449                 if ( $opts[ 'namespace' ] !== '' ) {
1450                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1451
1452                         if ( $opts[ 'associated' ] ) {
1453                                 $associatedNamespaces = array_map(
1454                                         function ( $ns ) {
1455                                                 return MWNamespace::getAssociated( $ns );
1456                                         },
1457                                         $namespaces
1458                                 );
1459                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1460                         }
1461
1462                         if ( count( $namespaces ) === 1 ) {
1463                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1464                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1465                         } else {
1466                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1467                                 sort( $namespaces );
1468                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1469                         }
1470                         $conds[] = "rc_namespace $operator $value";
1471                 }
1472
1473                 // Calculate cutoff
1474                 $cutoff_unixtime = time() - $opts['days'] * 3600 * 24;
1475                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
1476
1477                 $fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
1478                 if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
1479                         $cutoff = $dbr->timestamp( $opts['from'] );
1480                 } else {
1481                         $opts->reset( 'from' );
1482                 }
1483
1484                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
1485         }
1486
1487         /**
1488          * Process the query
1489          *
1490          * @param array $tables Array of tables; see IDatabase::select $table
1491          * @param array $fields Array of fields; see IDatabase::select $vars
1492          * @param array $conds Array of conditions; see IDatabase::select $conds
1493          * @param array $query_options Array of query options; see IDatabase::select $options
1494          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1495          * @param FormOptions $opts
1496          * @return bool|IResultWrapper Result or false
1497          */
1498         protected function doMainQuery( $tables, $fields, $conds,
1499                 $query_options, $join_conds, FormOptions $opts
1500         ) {
1501                 $rcQuery = RecentChange::getQueryInfo();
1502                 $tables = array_merge( $tables, $rcQuery['tables'] );
1503                 $fields = array_merge( $rcQuery['fields'], $fields );
1504                 $join_conds = array_merge( $join_conds, $rcQuery['joins'] );
1505
1506                 ChangeTags::modifyDisplayQuery(
1507                         $tables,
1508                         $fields,
1509                         $conds,
1510                         $join_conds,
1511                         $query_options,
1512                         ''
1513                 );
1514
1515                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1516                         $opts )
1517                 ) {
1518                         return false;
1519                 }
1520
1521                 $dbr = $this->getDB();
1522
1523                 return $dbr->select(
1524                         $tables,
1525                         $fields,
1526                         $conds,
1527                         __METHOD__,
1528                         $query_options,
1529                         $join_conds
1530                 );
1531         }
1532
1533         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1534                 &$query_options, &$join_conds, $opts
1535         ) {
1536                 return Hooks::run(
1537                         'ChangesListSpecialPageQuery',
1538                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1539                 );
1540         }
1541
1542         /**
1543          * Return a IDatabase object for reading
1544          *
1545          * @return IDatabase
1546          */
1547         protected function getDB() {
1548                 return wfGetDB( DB_REPLICA );
1549         }
1550
1551         /**
1552          * Send header output to the OutputPage object, only called if not using feeds
1553          *
1554          * @param int $rowCount Number of database rows
1555          * @param FormOptions $opts
1556          */
1557         private function webOutputHeader( $rowCount, $opts ) {
1558                 if ( !$this->including() ) {
1559                         $this->outputFeedLinks();
1560                         $this->doHeader( $opts, $rowCount );
1561                 }
1562         }
1563
1564         /**
1565          * Send output to the OutputPage object, only called if not used feeds
1566          *
1567          * @param IResultWrapper $rows Database rows
1568          * @param FormOptions $opts
1569          */
1570         public function webOutput( $rows, $opts ) {
1571                 $this->webOutputHeader( $rows->numRows(), $opts );
1572
1573                 $this->outputChangesList( $rows, $opts );
1574         }
1575
1576         /**
1577          * Output feed links.
1578          */
1579         public function outputFeedLinks() {
1580                 // nothing by default
1581         }
1582
1583         /**
1584          * Build and output the actual changes list.
1585          *
1586          * @param IResultWrapper $rows Database rows
1587          * @param FormOptions $opts
1588          */
1589         abstract public function outputChangesList( $rows, $opts );
1590
1591         /**
1592          * Set the text to be displayed above the changes
1593          *
1594          * @param FormOptions $opts
1595          * @param int $numRows Number of rows in the result to show after this header
1596          */
1597         public function doHeader( $opts, $numRows ) {
1598                 $this->setTopText( $opts );
1599
1600                 // @todo Lots of stuff should be done here.
1601
1602                 $this->setBottomText( $opts );
1603         }
1604
1605         /**
1606          * Send the text to be displayed before the options.
1607          * Should use $this->getOutput()->addWikiTextAsInterface()
1608          * or similar methods to print the text.
1609          *
1610          * @param FormOptions $opts
1611          */
1612         public function setTopText( FormOptions $opts ) {
1613                 // nothing by default
1614         }
1615
1616         /**
1617          * Send the text to be displayed after the options.
1618          * Should use $this->getOutput()->addWikiTextAsInterface()
1619          * or similar methods to print the text.
1620          *
1621          * @param FormOptions $opts
1622          */
1623         public function setBottomText( FormOptions $opts ) {
1624                 // nothing by default
1625         }
1626
1627         /**
1628          * Get options to be displayed in a form
1629          * @todo This should handle options returned by getDefaultOptions().
1630          * @todo Not called by anything in this class (but is in subclasses), should be
1631          * called by something… doHeader() maybe?
1632          *
1633          * @param FormOptions $opts
1634          * @return array
1635          */
1636         public function getExtraOptions( $opts ) {
1637                 return [];
1638         }
1639
1640         /**
1641          * Return the legend displayed within the fieldset
1642          *
1643          * @return string
1644          */
1645         public function makeLegend() {
1646                 $context = $this->getContext();
1647                 $user = $context->getUser();
1648                 # The legend showing what the letters and stuff mean
1649                 $legend = Html::openElement( 'dl' ) . "\n";
1650                 # Iterates through them and gets the messages for both letter and tooltip
1651                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1652                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1653                         unset( $legendItems['unpatrolled'] );
1654                 }
1655                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1656                         $label = $item['legend'] ?? $item['title'];
1657                         $letter = $item['letter'];
1658                         $cssClass = $item['class'] ?? $key;
1659
1660                         $legend .= Html::element( 'dt',
1661                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1662                         ) . "\n" .
1663                         Html::rawElement( 'dd',
1664                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1665                                 $context->msg( $label )->parse()
1666                         ) . "\n";
1667                 }
1668                 # (+-123)
1669                 $legend .= Html::rawElement( 'dt',
1670                         [ 'class' => 'mw-plusminus-pos' ],
1671                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1672                 ) . "\n";
1673                 $legend .= Html::element(
1674                         'dd',
1675                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1676                         $context->msg( 'recentchanges-label-plusminus' )->text()
1677                 ) . "\n";
1678                 $legend .= Html::closeElement( 'dl' ) . "\n";
1679
1680                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1681                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1682                         $context->msg( 'recentchanges-legend-heading' )->parse();
1683
1684                 # Collapsible
1685                 $collapsedState = $this->getRequest()->getCookie( 'changeslist-state' );
1686                 $collapsedClass = $collapsedState === 'collapsed' ? ' mw-collapsed' : '';
1687
1688                 $legend =
1689                         '<div class="mw-changeslist-legend mw-collapsible' . $collapsedClass . '">' .
1690                                 $legendHeading .
1691                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1692                         '</div>';
1693
1694                 return $legend;
1695         }
1696
1697         /**
1698          * Add page-specific modules.
1699          */
1700         protected function addModules() {
1701                 $out = $this->getOutput();
1702                 // Styles and behavior for the legend box (see makeLegend())
1703                 $out->addModuleStyles( [
1704                         'mediawiki.interface.helpers.styles',
1705                         'mediawiki.special.changeslist.legend',
1706                         'mediawiki.special.changeslist',
1707                 ] );
1708                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1709
1710                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
1711                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1712                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1713                 }
1714         }
1715
1716         protected function getGroupName() {
1717                 return 'changes';
1718         }
1719
1720         /**
1721          * Filter on users' experience levels; this will not be called if nothing is
1722          * selected.
1723          *
1724          * @param string $specialPageClassName Class name of current special page
1725          * @param IContextSource $context Context, for e.g. user
1726          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1727          * @param array &$tables Array of tables; see IDatabase::select $table
1728          * @param array &$fields Array of fields; see IDatabase::select $vars
1729          * @param array &$conds Array of conditions; see IDatabase::select $conds
1730          * @param array &$query_options Array of query options; see IDatabase::select $options
1731          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1732          * @param array $selectedExpLevels The allowed active values, sorted
1733          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1734          *   (optional)
1735          */
1736         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1737                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1738         ) {
1739                 global $wgLearnerEdits,
1740                         $wgExperiencedUserEdits,
1741                         $wgLearnerMemberSince,
1742                         $wgExperiencedUserMemberSince;
1743
1744                 $LEVEL_COUNT = 5;
1745
1746                 // If all levels are selected, don't filter
1747                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1748                         return;
1749                 }
1750
1751                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1752                 if (
1753                         in_array( 'registered', $selectedExpLevels ) &&
1754                         in_array( 'unregistered', $selectedExpLevels )
1755                 ) {
1756                         return;
1757                 }
1758
1759                 $actorMigration = ActorMigration::newMigration();
1760                 $actorQuery = $actorMigration->getJoin( 'rc_user' );
1761                 $tables += $actorQuery['tables'];
1762                 $join_conds += $actorQuery['joins'];
1763
1764                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1765                 if (
1766                         in_array( 'registered', $selectedExpLevels ) &&
1767                         !in_array( 'unregistered', $selectedExpLevels )
1768                 ) {
1769                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1770                         return;
1771                 }
1772
1773                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1774                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1775                         return;
1776                 }
1777
1778                 $tables[] = 'user';
1779                 $join_conds['user'] = [ 'LEFT JOIN', $actorQuery['fields']['rc_user'] . ' = user_id' ];
1780
1781                 if ( $now === 0 ) {
1782                         $now = time();
1783                 }
1784                 $secondsPerDay = 86400;
1785                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1786                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1787
1788                 $aboveNewcomer = $dbr->makeList(
1789                         [
1790                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1791                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1792                         ],
1793                         IDatabase::LIST_AND
1794                 );
1795
1796                 $aboveLearner = $dbr->makeList(
1797                         [
1798                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1799                                 'user_registration <= ' .
1800                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1801                         ],
1802                         IDatabase::LIST_AND
1803                 );
1804
1805                 $conditions = [];
1806
1807                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1808                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1809                         $conditions[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1810                 }
1811
1812                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1813                         $conditions[] = "NOT ( $aboveNewcomer )";
1814                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1815                         $conditions[] = $dbr->makeList(
1816                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1817                                 IDatabase::LIST_AND
1818                         );
1819                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1820                         $conditions[] = $aboveLearner;
1821                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1822                         $conditions[] = "NOT ( $aboveLearner )";
1823                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1824                         $conditions[] = $dbr->makeList(
1825                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1826                                 IDatabase::LIST_OR
1827                         );
1828                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1829                         $conditions[] = $aboveNewcomer;
1830                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1831                         $conditions[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1832                 }
1833
1834                 if ( count( $conditions ) > 1 ) {
1835                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1836                 } elseif ( count( $conditions ) === 1 ) {
1837                         $conds[] = reset( $conditions );
1838                 }
1839         }
1840
1841         /**
1842          * Check whether the structured filter UI is enabled
1843          *
1844          * @return bool
1845          */
1846         public function isStructuredFilterUiEnabled() {
1847                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1848                         return true;
1849                 }
1850
1851                 return static::checkStructuredFilterUiEnabled(
1852                         $this->getConfig(),
1853                         $this->getUser()
1854                 );
1855         }
1856
1857         /**
1858          * Static method to check whether StructuredFilter UI is enabled for the given user
1859          *
1860          * @since 1.31
1861          * @param Config $config
1862          * @param User $user
1863          * @return bool
1864          */
1865         public static function checkStructuredFilterUiEnabled( Config $config, User $user ) {
1866                 return !$user->getOption( 'rcenhancedfilters-disable' );
1867         }
1868
1869         /**
1870          * Get the default value of the number of changes to display when loading
1871          * the result set.
1872          *
1873          * @since 1.30
1874          * @return int
1875          */
1876         public function getDefaultLimit() {
1877                 return $this->getUser()->getIntOption( static::$limitPreferenceName );
1878         }
1879
1880         /**
1881          * Get the default value of the number of days to display when loading
1882          * the result set.
1883          * Supports fractional values, and should be cast to a float.
1884          *
1885          * @since 1.30
1886          * @return float
1887          */
1888         public function getDefaultDays() {
1889                 return floatval( $this->getUser()->getOption( static::$daysPreferenceName ) );
1890         }
1891 }