includes/specialpage/ChangesListSpecialPage.php

   1 <?php
   2 /**
   3  * Special page which uses a ChangesList to show query results.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23 use MediaWiki\Logger\LoggerFactory;
  24 use Wikimedia\Rdbms\DBQueryTimeoutError;
  25 use Wikimedia\Rdbms\IResultWrapper;
  26 use Wikimedia\Rdbms\FakeResultWrapper;
  27 use Wikimedia\Rdbms\IDatabase;
  28
  29 /**
  30  * Special page which uses a ChangesList to show query results.
  31  * @todo Way too many public functions, most of them should be protected
  32  *
  33  * @ingroup SpecialPage
  34  */
  35 abstract class ChangesListSpecialPage extends SpecialPage {
  36         /**
  37          * Maximum length of a tag description in UTF-8 characters.
  38          * Longer descriptions will be truncated.
  39          */
  40         const TAG_DESC_CHARACTER_LIMIT = 120;
  41
  42         /**
  43          * Preference name for saved queries. Subclasses that use saved queries should override this.
  44          * @var string
  45          */
  46         protected static $savedQueriesPreferenceName;
  47
  48         /**
  49          * Preference name for 'days'. Subclasses should override this.
  50          * @var string
  51          */
  52         protected static $daysPreferenceName;
  53
  54         /**
  55          * Preference name for 'limit'. Subclasses should override this.
  56          * @var string
  57          */
  58         protected static $limitPreferenceName;
  59
  60         /**
  61          * Preference name for collapsing the active filter display. Subclasses should override this.
  62          * @var string
  63          */
  64         protected static $collapsedPreferenceName;
  65
  66         /** @var string */
  67         protected $rcSubpage;
  68
  69         /** @var FormOptions */
  70         protected $rcOptions;
  71
  72         // Order of both groups and filters is significant; first is top-most priority,
  73         // descending from there.
  74         // 'showHideSuffix' is a shortcut to and avoid spelling out
  75         // details specific to subclasses here.
  76         /**
  77          * Definition information for the filters and their groups
  78          *
  79          * The value is $groupDefinition, a parameter to the ChangesListFilterGroup constructor.
  80          * However, priority is dynamically added for the core groups, to ease maintenance.
  81          *
  82          * Groups are displayed to the user in the structured UI.  However, if necessary,
  83          * all of the filters in a group can be configured to only display on the
  84          * unstuctured UI, in which case you don't need a group title.
  85          *
  86          * @var array $filterGroupDefinitions
  87          */
  88         private $filterGroupDefinitions;
  89
  90         // Same format as filterGroupDefinitions, but for a single group (reviewStatus)
  91         // that is registered conditionally.
  92         private $legacyReviewStatusFilterGroupDefinition;
  93
  94         // Single filter group registered conditionally
  95         private $reviewStatusFilterGroupDefinition;
  96
  97         // Single filter group registered conditionally
  98         private $hideCategorizationFilterDefinition;
  99
 100         /**
 101          * Filter groups, and their contained filters
 102          * This is an associative array (with group name as key) of ChangesListFilterGroup objects.
 103          *
 104          * @var array $filterGroups
 105          */
 106         protected $filterGroups = [];
 107
 108         public function __construct( $name, $restriction ) {
 109                 parent::__construct( $name, $restriction );
 110
 111                 $nonRevisionTypes = [ RC_LOG ];
 112                 Hooks::run( 'SpecialWatchlistGetNonRevisionTypes', [ &$nonRevisionTypes ] );
 113
 114                 $this->filterGroupDefinitions = [
 115                         [
 116                                 'name' => 'registration',
 117                                 'title' => 'rcfilters-filtergroup-registration',
 118                                 'class' => ChangesListBooleanFilterGroup::class,
 119                                 'filters' => [
 120                                         [
 121                                                 'name' => 'hideliu',
 122                                                 // rcshowhideliu-show, rcshowhideliu-hide,
 123                                                 // wlshowhideliu
 124                                                 'showHideSuffix' => 'showhideliu',
 125                                                 'default' => false,
 126                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 127                                                         &$query_options, &$join_conds
 128                                                 ) {
 129                                                         $actorMigration = ActorMigration::newMigration();
 130                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 131                                                         $tables += $actorQuery['tables'];
 132                                                         $join_conds += $actorQuery['joins'];
 133                                                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
 134                                                 },
 135                                                 'isReplacedInStructuredUi' => true,
 136
 137                                         ],
 138                                         [
 139                                                 'name' => 'hideanons',
 140                                                 // rcshowhideanons-show, rcshowhideanons-hide,
 141                                                 // wlshowhideanons
 142                                                 'showHideSuffix' => 'showhideanons',
 143                                                 'default' => false,
 144                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 145                                                         &$query_options, &$join_conds
 146                                                 ) {
 147                                                         $actorMigration = ActorMigration::newMigration();
 148                                                         $actorQuery = $actorMigration->getJoin( 'rc_user' );
 149                                                         $tables += $actorQuery['tables'];
 150                                                         $join_conds += $actorQuery['joins'];
 151                                                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
 152                                                 },
 153                                                 'isReplacedInStructuredUi' => true,
 154                                         ]
 155                                 ],
 156                         ],
 157
 158                         [
 159                                 'name' => 'userExpLevel',
 160                                 'title' => 'rcfilters-filtergroup-userExpLevel',
 161                                 'class' => ChangesListStringOptionsFilterGroup::class,
 162                                 'isFullCoverage' => true,
 163                                 'filters' => [
 164                                         [
 165                                                 'name' => 'unregistered',
 166                                                 'label' => 'rcfilters-filter-user-experience-level-unregistered-label',
 167                                                 'description' => 'rcfilters-filter-user-experience-level-unregistered-description',
 168                                                 'cssClassSuffix' => 'user-unregistered',
 169                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 170                                                         return !$rc->getAttribute( 'rc_user' );
 171                                                 }
 172                                         ],
 173                                         [
 174                                                 'name' => 'registered',
 175                                                 'label' => 'rcfilters-filter-user-experience-level-registered-label',
 176                                                 'description' => 'rcfilters-filter-user-experience-level-registered-description',
 177                                                 'cssClassSuffix' => 'user-registered',
 178                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 179                                                         return $rc->getAttribute( 'rc_user' );
 180                                                 }
 181                                         ],
 182                                         [
 183                                                 'name' => 'newcomer',
 184                                                 'label' => 'rcfilters-filter-user-experience-level-newcomer-label',
 185                                                 'description' => 'rcfilters-filter-user-experience-level-newcomer-description',
 186                                                 'cssClassSuffix' => 'user-newcomer',
 187                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 188                                                         $performer = $rc->getPerformer();
 189                                                         return $performer && $performer->isLoggedIn() &&
 190                                                                 $performer->getExperienceLevel() === 'newcomer';
 191                                                 }
 192                                         ],
 193                                         [
 194                                                 'name' => 'learner',
 195                                                 'label' => 'rcfilters-filter-user-experience-level-learner-label',
 196                                                 'description' => 'rcfilters-filter-user-experience-level-learner-description',
 197                                                 'cssClassSuffix' => 'user-learner',
 198                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 199                                                         $performer = $rc->getPerformer();
 200                                                         return $performer && $performer->isLoggedIn() &&
 201                                                                 $performer->getExperienceLevel() === 'learner';
 202                                                 },
 203                                         ],
 204                                         [
 205                                                 'name' => 'experienced',
 206                                                 'label' => 'rcfilters-filter-user-experience-level-experienced-label',
 207                                                 'description' => 'rcfilters-filter-user-experience-level-experienced-description',
 208                                                 'cssClassSuffix' => 'user-experienced',
 209                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 210                                                         $performer = $rc->getPerformer();
 211                                                         return $performer && $performer->isLoggedIn() &&
 212                                                                 $performer->getExperienceLevel() === 'experienced';
 213                                                 },
 214                                         ]
 215                                 ],
 216                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 217                                 'queryCallable' => [ $this, 'filterOnUserExperienceLevel' ],
 218                         ],
 219
 220                         [
 221                                 'name' => 'authorship',
 222                                 'title' => 'rcfilters-filtergroup-authorship',
 223                                 'class' => ChangesListBooleanFilterGroup::class,
 224                                 'filters' => [
 225                                         [
 226                                                 'name' => 'hidemyself',
 227                                                 'label' => 'rcfilters-filter-editsbyself-label',
 228                                                 'description' => 'rcfilters-filter-editsbyself-description',
 229                                                 // rcshowhidemine-show, rcshowhidemine-hide,
 230                                                 // wlshowhidemine
 231                                                 'showHideSuffix' => 'showhidemine',
 232                                                 'default' => false,
 233                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 234                                                         &$query_options, &$join_conds
 235                                                 ) {
 236                                                         $actorQuery = ActorMigration::newMigration()->getWhere( $dbr, 'rc_user', $ctx->getUser() );
 237                                                         $tables += $actorQuery['tables'];
 238                                                         $join_conds += $actorQuery['joins'];
 239                                                         $conds[] = 'NOT(' . $actorQuery['conds'] . ')';
 240                                                 },
 241                                                 'cssClassSuffix' => 'self',
 242                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 243                                                         return $ctx->getUser()->equals( $rc->getPerformer() );
 244                                                 },
 245                                         ],
 246                                         [
 247                                                 'name' => 'hidebyothers',
 248                                                 'label' => 'rcfilters-filter-editsbyother-label',
 249                                                 'description' => 'rcfilters-filter-editsbyother-description',
 250                                                 'default' => false,
 251                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 252                                                         &$query_options, &$join_conds
 253                                                 ) {
 254                                                         $actorQuery = ActorMigration::newMigration()
 255                                                                 ->getWhere( $dbr, 'rc_user', $ctx->getUser(), false );
 256                                                         $tables += $actorQuery['tables'];
 257                                                         $join_conds += $actorQuery['joins'];
 258                                                         $conds[] = $actorQuery['conds'];
 259                                                 },
 260                                                 'cssClassSuffix' => 'others',
 261                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 262                                                         return !$ctx->getUser()->equals( $rc->getPerformer() );
 263                                                 },
 264                                         ]
 265                                 ]
 266                         ],
 267
 268                         [
 269                                 'name' => 'automated',
 270                                 'title' => 'rcfilters-filtergroup-automated',
 271                                 'class' => ChangesListBooleanFilterGroup::class,
 272                                 'filters' => [
 273                                         [
 274                                                 'name' => 'hidebots',
 275                                                 'label' => 'rcfilters-filter-bots-label',
 276                                                 'description' => 'rcfilters-filter-bots-description',
 277                                                 // rcshowhidebots-show, rcshowhidebots-hide,
 278                                                 // wlshowhidebots
 279                                                 'showHideSuffix' => 'showhidebots',
 280                                                 'default' => false,
 281                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 282                                                         &$query_options, &$join_conds
 283                                                 ) {
 284                                                         $conds['rc_bot'] = 0;
 285                                                 },
 286                                                 'cssClassSuffix' => 'bot',
 287                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 288                                                         return $rc->getAttribute( 'rc_bot' );
 289                                                 },
 290                                         ],
 291                                         [
 292                                                 'name' => 'hidehumans',
 293                                                 'label' => 'rcfilters-filter-humans-label',
 294                                                 'description' => 'rcfilters-filter-humans-description',
 295                                                 'default' => false,
 296                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 297                                                         &$query_options, &$join_conds
 298                                                 ) {
 299                                                         $conds['rc_bot'] = 1;
 300                                                 },
 301                                                 'cssClassSuffix' => 'human',
 302                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 303                                                         return !$rc->getAttribute( 'rc_bot' );
 304                                                 },
 305                                         ]
 306                                 ]
 307                         ],
 308
 309                         // significance (conditional)
 310
 311                         [
 312                                 'name' => 'significance',
 313                                 'title' => 'rcfilters-filtergroup-significance',
 314                                 'class' => ChangesListBooleanFilterGroup::class,
 315                                 'priority' => -6,
 316                                 'filters' => [
 317                                         [
 318                                                 'name' => 'hideminor',
 319                                                 'label' => 'rcfilters-filter-minor-label',
 320                                                 'description' => 'rcfilters-filter-minor-description',
 321                                                 // rcshowhideminor-show, rcshowhideminor-hide,
 322                                                 // wlshowhideminor
 323                                                 'showHideSuffix' => 'showhideminor',
 324                                                 'default' => false,
 325                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 326                                                         &$query_options, &$join_conds
 327                                                 ) {
 328                                                         $conds[] = 'rc_minor = 0';
 329                                                 },
 330                                                 'cssClassSuffix' => 'minor',
 331                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 332                                                         return $rc->getAttribute( 'rc_minor' );
 333                                                 }
 334                                         ],
 335                                         [
 336                                                 'name' => 'hidemajor',
 337                                                 'label' => 'rcfilters-filter-major-label',
 338                                                 'description' => 'rcfilters-filter-major-description',
 339                                                 'default' => false,
 340                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 341                                                         &$query_options, &$join_conds
 342                                                 ) {
 343                                                         $conds[] = 'rc_minor = 1';
 344                                                 },
 345                                                 'cssClassSuffix' => 'major',
 346                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 347                                                         return !$rc->getAttribute( 'rc_minor' );
 348                                                 }
 349                                         ]
 350                                 ]
 351                         ],
 352
 353                         [
 354                                 'name' => 'lastRevision',
 355                                 'title' => 'rcfilters-filtergroup-lastRevision',
 356                                 'class' => ChangesListBooleanFilterGroup::class,
 357                                 'priority' => -7,
 358                                 'filters' => [
 359                                         [
 360                                                 'name' => 'hidelastrevision',
 361                                                 'label' => 'rcfilters-filter-lastrevision-label',
 362                                                 'description' => 'rcfilters-filter-lastrevision-description',
 363                                                 'default' => false,
 364                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 365                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 366                                                         $conds[] = $dbr->makeList(
 367                                                                 [
 368                                                                         'rc_this_oldid <> page_latest',
 369                                                                         'rc_type' => $nonRevisionTypes,
 370                                                                 ],
 371                                                                 LIST_OR
 372                                                         );
 373                                                 },
 374                                                 'cssClassSuffix' => 'last',
 375                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 376                                                         return $rc->getAttribute( 'rc_this_oldid' ) === $rc->getAttribute( 'page_latest' );
 377                                                 }
 378                                         ],
 379                                         [
 380                                                 'name' => 'hidepreviousrevisions',
 381                                                 'label' => 'rcfilters-filter-previousrevision-label',
 382                                                 'description' => 'rcfilters-filter-previousrevision-description',
 383                                                 'default' => false,
 384                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 385                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 386                                                         $conds[] = $dbr->makeList(
 387                                                                 [
 388                                                                         'rc_this_oldid = page_latest',
 389                                                                         'rc_type' => $nonRevisionTypes,
 390                                                                 ],
 391                                                                 LIST_OR
 392                                                         );
 393                                                 },
 394                                                 'cssClassSuffix' => 'previous',
 395                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 396                                                         return $rc->getAttribute( 'rc_this_oldid' ) !== $rc->getAttribute( 'page_latest' );
 397                                                 }
 398                                         ]
 399                                 ]
 400                         ],
 401
 402                         // With extensions, there can be change types that will not be hidden by any of these.
 403                         [
 404                                 'name' => 'changeType',
 405                                 'title' => 'rcfilters-filtergroup-changetype',
 406                                 'class' => ChangesListBooleanFilterGroup::class,
 407                                 'priority' => -8,
 408                                 'filters' => [
 409                                         [
 410                                                 'name' => 'hidepageedits',
 411                                                 'label' => 'rcfilters-filter-pageedits-label',
 412                                                 'description' => 'rcfilters-filter-pageedits-description',
 413                                                 'default' => false,
 414                                                 'priority' => -2,
 415                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 416                                                         &$query_options, &$join_conds
 417                                                 ) {
 418                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_EDIT );
 419                                                 },
 420                                                 'cssClassSuffix' => 'src-mw-edit',
 421                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 422                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_EDIT;
 423                                                 },
 424                                         ],
 425                                         [
 426                                                 'name' => 'hidenewpages',
 427                                                 'label' => 'rcfilters-filter-newpages-label',
 428                                                 'description' => 'rcfilters-filter-newpages-description',
 429                                                 'default' => false,
 430                                                 'priority' => -3,
 431                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 432                                                         &$query_options, &$join_conds
 433                                                 ) {
 434                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_NEW );
 435                                                 },
 436                                                 'cssClassSuffix' => 'src-mw-new',
 437                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 438                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_NEW;
 439                                                 },
 440                                         ],
 441
 442                                         // hidecategorization
 443
 444                                         [
 445                                                 'name' => 'hidelog',
 446                                                 'label' => 'rcfilters-filter-logactions-label',
 447                                                 'description' => 'rcfilters-filter-logactions-description',
 448                                                 'default' => false,
 449                                                 'priority' => -5,
 450                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 451                                                         &$query_options, &$join_conds
 452                                                 ) {
 453                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_LOG );
 454                                                 },
 455                                                 'cssClassSuffix' => 'src-mw-log',
 456                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 457                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_LOG;
 458                                                 }
 459                                         ],
 460                                 ],
 461                         ],
 462
 463                 ];
 464
 465                 $this->legacyReviewStatusFilterGroupDefinition = [
 466                         [
 467                                 'name' => 'legacyReviewStatus',
 468                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 469                                 'class' => ChangesListBooleanFilterGroup::class,
 470                                 'filters' => [
 471                                         [
 472                                                 'name' => 'hidepatrolled',
 473                                                 // rcshowhidepatr-show, rcshowhidepatr-hide
 474                                                 // wlshowhidepatr
 475                                                 'showHideSuffix' => 'showhidepatr',
 476                                                 'default' => false,
 477                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 478                                                         &$query_options, &$join_conds
 479                                                 ) {
 480                                                         $conds['rc_patrolled'] = RecentChange::PRC_UNPATROLLED;
 481                                                 },
 482                                                 'isReplacedInStructuredUi' => true,
 483                                         ],
 484                                         [
 485                                                 'name' => 'hideunpatrolled',
 486                                                 'default' => false,
 487                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 488                                                         &$query_options, &$join_conds
 489                                                 ) {
 490                                                         $conds[] = 'rc_patrolled != ' . RecentChange::PRC_UNPATROLLED;
 491                                                 },
 492                                                 'isReplacedInStructuredUi' => true,
 493                                         ],
 494                                 ],
 495                         ]
 496                 ];
 497
 498                 $this->reviewStatusFilterGroupDefinition = [
 499                         [
 500                                 'name' => 'reviewStatus',
 501                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 502                                 'class' => ChangesListStringOptionsFilterGroup::class,
 503                                 'isFullCoverage' => true,
 504                                 'priority' => -5,
 505                                 'filters' => [
 506                                         [
 507                                                 'name' => 'unpatrolled',
 508                                                 'label' => 'rcfilters-filter-reviewstatus-unpatrolled-label',
 509                                                 'description' => 'rcfilters-filter-reviewstatus-unpatrolled-description',
 510                                                 'cssClassSuffix' => 'reviewstatus-unpatrolled',
 511                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 512                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_UNPATROLLED;
 513                                                 },
 514                                         ],
 515                                         [
 516                                                 'name' => 'manual',
 517                                                 'label' => 'rcfilters-filter-reviewstatus-manual-label',
 518                                                 'description' => 'rcfilters-filter-reviewstatus-manual-description',
 519                                                 'cssClassSuffix' => 'reviewstatus-manual',
 520                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 521                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_PATROLLED;
 522                                                 },
 523                                         ],
 524                                         [
 525                                                 'name' => 'auto',
 526                                                 'label' => 'rcfilters-filter-reviewstatus-auto-label',
 527                                                 'description' => 'rcfilters-filter-reviewstatus-auto-description',
 528                                                 'cssClassSuffix' => 'reviewstatus-auto',
 529                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 530                                                         return $rc->getAttribute( 'rc_patrolled' ) == RecentChange::PRC_AUTOPATROLLED;
 531                                                 },
 532                                         ],
 533                                 ],
 534                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 535                                 'queryCallable' => function ( $specialPageClassName, $ctx, $dbr,
 536                                         &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selected
 537                                 ) {
 538                                         if ( $selected === [] ) {
 539                                                 return;
 540                                         }
 541                                         $rcPatrolledValues = [
 542                                                 'unpatrolled' => RecentChange::PRC_UNPATROLLED,
 543                                                 'manual' => RecentChange::PRC_PATROLLED,
 544                                                 'auto' => RecentChange::PRC_AUTOPATROLLED,
 545                                         ];
 546                                         // e.g. rc_patrolled IN (0, 2)
 547                                         $conds['rc_patrolled'] = array_map( function ( $s ) use ( $rcPatrolledValues ) {
 548                                                 return $rcPatrolledValues[ $s ];
 549                                         }, $selected );
 550                                 }
 551                         ]
 552                 ];
 553
 554                 $this->hideCategorizationFilterDefinition = [
 555                         'name' => 'hidecategorization',
 556                         'label' => 'rcfilters-filter-categorization-label',
 557                         'description' => 'rcfilters-filter-categorization-description',
 558                         // rcshowhidecategorization-show, rcshowhidecategorization-hide.
 559                         // wlshowhidecategorization
 560                         'showHideSuffix' => 'showhidecategorization',
 561                         'default' => false,
 562                         'priority' => -4,
 563                         'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 564                                 &$query_options, &$join_conds
 565                         ) {
 566                                 $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 567                         },
 568                         'cssClassSuffix' => 'src-mw-categorize',
 569                         'isRowApplicableCallable' => function ( $ctx, $rc ) {
 570                                 return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_CATEGORIZE;
 571                         },
 572                 ];
 573         }
 574
 575         /**
 576          * Check if filters are in conflict and guaranteed to return no results.
 577          *
 578          * @return bool
 579          */
 580         protected function areFiltersInConflict() {
 581                 $opts = $this->getOptions();
 582                 /** @var ChangesListFilterGroup $group */
 583                 foreach ( $this->getFilterGroups() as $group ) {
 584                         if ( $group->getConflictingGroups() ) {
 585                                 wfLogWarning(
 586                                         $group->getName() .
 587                                         " specifies conflicts with other groups but these are not supported yet."
 588                                 );
 589                         }
 590
 591                         /** @var ChangesListFilter $conflictingFilter */
 592                         foreach ( $group->getConflictingFilters() as $conflictingFilter ) {
 593                                 if ( $conflictingFilter->activelyInConflictWithGroup( $group, $opts ) ) {
 594                                         return true;
 595                                 }
 596                         }
 597
 598                         /** @var ChangesListFilter $filter */
 599                         foreach ( $group->getFilters() as $filter ) {
 600                                 /** @var ChangesListFilter $conflictingFilter */
 601                                 foreach ( $filter->getConflictingFilters() as $conflictingFilter ) {
 602                                         if (
 603                                                 $conflictingFilter->activelyInConflictWithFilter( $filter, $opts ) &&
 604                                                 $filter->activelyInConflictWithFilter( $conflictingFilter, $opts )
 605                                         ) {
 606                                                 return true;
 607                                         }
 608                                 }
 609
 610                         }
 611
 612                 }
 613
 614                 return false;
 615         }
 616
 617         /**
 618          * Main execution point
 619          *
 620          * @param string $subpage
 621          */
 622         public function execute( $subpage ) {
 623                 $this->rcSubpage = $subpage;
 624
 625                 $this->considerActionsForDefaultSavedQuery( $subpage );
 626
 627                 $opts = $this->getOptions();
 628                 try {
 629                         $rows = $this->getRows();
 630                         if ( $rows === false ) {
 631                                 $rows = new FakeResultWrapper( [] );
 632                         }
 633
 634                         // Used by Structured UI app to get results without MW chrome
 635                         if ( $this->getRequest()->getVal( 'action' ) === 'render' ) {
 636                                 $this->getOutput()->setArticleBodyOnly( true );
 637                         }
 638
 639                         // Used by "live update" and "view newest" to check
 640                         // if there's new changes with minimal data transfer
 641                         if ( $this->getRequest()->getBool( 'peek' ) ) {
 642                                 $code = $rows->numRows() > 0 ? 200 : 204;
 643                                 $this->getOutput()->setStatusCode( $code );
 644
 645                                 if ( $this->getUser()->isAnon() !==
 646                                         $this->getRequest()->getFuzzyBool( 'isAnon' )
 647                                 ) {
 648                                         $this->getOutput()->setStatusCode( 205 );
 649                                 }
 650
 651                                 return;
 652                         }
 653
 654                         $batch = new LinkBatch;
 655                         foreach ( $rows as $row ) {
 656                                 $batch->add( NS_USER, $row->rc_user_text );
 657                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 658                                 $batch->add( $row->rc_namespace, $row->rc_title );
 659                                 if ( $row->rc_source === RecentChange::SRC_LOG ) {
 660                                         $formatter = LogFormatter::newFromRow( $row );
 661                                         foreach ( $formatter->getPreloadTitles() as $title ) {
 662                                                 $batch->addObj( $title );
 663                                         }
 664                                 }
 665                         }
 666                         $batch->execute();
 667
 668                         $this->setHeaders();
 669                         $this->outputHeader();
 670                         $this->addModules();
 671                         $this->webOutput( $rows, $opts );
 672
 673                         $rows->free();
 674                 } catch ( DBQueryTimeoutError $timeoutException ) {
 675                         MWExceptionHandler::logException( $timeoutException );
 676
 677                         $this->setHeaders();
 678                         $this->outputHeader();
 679                         $this->addModules();
 680
 681                         $this->getOutput()->setStatusCode( 500 );
 682                         $this->webOutputHeader( 0, $opts );
 683                         $this->outputTimeout();
 684                 }
 685
 686                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 687                         // Clean up any bad page entries for titles showing up in RC
 688                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 689                                 $this->getDB(),
 690                                 LoggerFactory::getInstance( 'objectcache' )
 691                         ) );
 692                 }
 693
 694                 $this->includeRcFiltersApp();
 695         }
 696
 697         /**
 698          * Check whether or not the page should load defaults, and if so, whether
 699          * a default saved query is relevant to be redirected to. If it is relevant,
 700          * redirect properly with all necessary query parameters.
 701          *
 702          * @param string $subpage
 703          */
 704         protected function considerActionsForDefaultSavedQuery( $subpage ) {
 705                 if ( !$this->isStructuredFilterUiEnabled() || $this->including() ) {
 706                         return;
 707                 }
 708
 709                 $knownParams = $this->getRequest()->getValues(
 710                         ...array_keys( $this->getOptions()->getAllValues() )
 711                 );
 712
 713                 // HACK: Temporarily until we can properly define "sticky" filters and parameters,
 714                 // we need to exclude several parameters we know should not be counted towards preventing
 715                 // the loading of defaults.
 716                 $excludedParams = [ 'limit' => '', 'days' => '', 'enhanced' => '', 'from' => '' ];
 717                 $knownParams = array_diff_key( $knownParams, $excludedParams );
 718
 719                 if (
 720                         // If there are NO known parameters in the URL request
 721                         // (that are not excluded) then we need to check into loading
 722                         // the default saved query
 723                         count( $knownParams ) === 0
 724                 ) {
 725                         // Get the saved queries data and parse it
 726                         $savedQueries = FormatJson::decode(
 727                                 $this->getUser()->getOption( static::$savedQueriesPreferenceName ),
 728                                 true
 729                         );
 730
 731                         if ( $savedQueries && isset( $savedQueries[ 'default' ] ) ) {
 732                                 // Only load queries that are 'version' 2, since those
 733                                 // have parameter representation
 734                                 if ( isset( $savedQueries[ 'version' ] ) && $savedQueries[ 'version' ] === '2' ) {
 735                                         $savedQueryDefaultID = $savedQueries[ 'default' ];
 736                                         $defaultQuery = $savedQueries[ 'queries' ][ $savedQueryDefaultID ][ 'data' ];
 737
 738                                         // Build the entire parameter list
 739                                         $query = array_merge(
 740                                                 $defaultQuery[ 'params' ],
 741                                                 $defaultQuery[ 'highlights' ],
 742                                                 [
 743                                                         'urlversion' => '2',
 744                                                 ]
 745                                         );
 746                                         // Add to the query any parameters that we may have ignored before
 747                                         // but are still valid and requested in the URL
 748                                         $query = array_merge( $this->getRequest()->getValues(), $query );
 749                                         unset( $query[ 'title' ] );
 750                                         $this->getOutput()->redirect( $this->getPageTitle( $subpage )->getCanonicalURL( $query ) );
 751                                 } else {
 752                                         // There's a default, but the version is not 2, and the server can't
 753                                         // actually recognize the query itself. This happens if it is before
 754                                         // the conversion, so we need to tell the UI to reload saved query as
 755                                         // it does the conversion to version 2
 756                                         $this->getOutput()->addJsConfigVars(
 757                                                 'wgStructuredChangeFiltersDefaultSavedQueryExists',
 758                                                 true
 759                                         );
 760
 761                                         // Add the class that tells the frontend it is still loading
 762                                         // another query
 763                                         $this->getOutput()->addBodyClasses( 'mw-rcfilters-ui-loading' );
 764                                 }
 765                         }
 766                 }
 767         }
 768
 769         /**
 770          * Include the modules and configuration for the RCFilters app.
 771          * Conditional on the user having the feature enabled.
 772          *
 773          * If it is disabled, add a <body> class marking that
 774          */
 775         protected function includeRcFiltersApp() {
 776                 $out = $this->getOutput();
 777                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
 778                         $jsData = $this->getStructuredFilterJsData();
 779                         $messages = [];
 780                         foreach ( $jsData['messageKeys'] as $key ) {
 781                                 $messages[$key] = $this->msg( $key )->plain();
 782                         }
 783
 784                         $out->addBodyClasses( 'mw-rcfilters-enabled' );
 785                         $collapsed = $this->getUser()->getBoolOption( static::$collapsedPreferenceName );
 786                         if ( $collapsed ) {
 787                                 $out->addBodyClasses( 'mw-rcfilters-collapsed' );
 788                         }
 789
 790                         // These config and message exports should be moved into a ResourceLoader data module (T201574)
 791                         $out->addJsConfigVars( 'wgStructuredChangeFilters', $jsData['groups'] );
 792                         $out->addJsConfigVars( 'wgStructuredChangeFiltersMessages', $messages );
 793                         $out->addJsConfigVars( 'wgStructuredChangeFiltersCollapsedState', $collapsed );
 794
 795                         $out->addJsConfigVars(
 796                                 'wgRCFiltersChangeTags',
 797                                 $this->getChangeTagList()
 798                         );
 799                         $out->addJsConfigVars(
 800                                 'StructuredChangeFiltersDisplayConfig',
 801                                 [
 802                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 803                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 804                                         'limitDefault' => $this->getDefaultLimit(),
 805                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 806                                         'daysDefault' => $this->getDefaultDays(),
 807                                 ]
 808                         );
 809
 810                         $out->addJsConfigVars(
 811                                 'wgStructuredChangeFiltersSavedQueriesPreferenceName',
 812                                 static::$savedQueriesPreferenceName
 813                         );
 814                         $out->addJsConfigVars(
 815                                 'wgStructuredChangeFiltersLimitPreferenceName',
 816                                 static::$limitPreferenceName
 817                         );
 818                         $out->addJsConfigVars(
 819                                 'wgStructuredChangeFiltersDaysPreferenceName',
 820                                 static::$daysPreferenceName
 821                         );
 822                         $out->addJsConfigVars(
 823                                 'wgStructuredChangeFiltersCollapsedPreferenceName',
 824                                 static::$collapsedPreferenceName
 825                         );
 826
 827                         $out->addJsConfigVars(
 828                                 'StructuredChangeFiltersLiveUpdatePollingRate',
 829                                 $this->getConfig()->get( 'StructuredChangeFiltersLiveUpdatePollingRate' )
 830                         );
 831                 } else {
 832                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 833                 }
 834         }
 835
 836         /**
 837          * Fetch the change tags list for the front end
 838          *
 839          * @return array Tag data
 840          */
 841         protected function getChangeTagList() {
 842                 $cache = ObjectCache::getMainWANInstance();
 843                 $context = $this->getContext();
 844                 return $cache->getWithSetCallback(
 845                         $cache->makeKey( 'changeslistspecialpage-changetags', $context->getLanguage()->getCode() ),
 846                         $cache::TTL_MINUTE * 10,
 847                         function () use ( $context ) {
 848                                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 849                                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 850
 851                                 $tagStats = ChangeTags::tagUsageStatistics();
 852                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 853
 854                                 // Sort by hits (disabled for now)
 855                                 //arsort( $tagHitCounts );
 856
 857                                 // Build the list and data
 858                                 $result = [];
 859                                 foreach ( $tagHitCounts as $tagName => $hits ) {
 860                                         if (
 861                                                 (
 862                                                         // Only get active tags
 863                                                         isset( $explicitlyDefinedTags[ $tagName ] ) ||
 864                                                         isset( $softwareActivatedTags[ $tagName ] )
 865                                                 ) &&
 866                                                 // Only get tags with more than 0 hits
 867                                                 $hits > 0
 868                                         ) {
 869                                                 $result[] = [
 870                                                         'name' => $tagName,
 871                                                         'label' => Sanitizer::stripAllTags(
 872                                                                 ChangeTags::tagDescription( $tagName, $context )
 873                                                         ),
 874                                                         'description' =>
 875                                                                 ChangeTags::truncateTagDescription(
 876                                                                         $tagName,
 877                                                                         self::TAG_DESC_CHARACTER_LIMIT,
 878                                                                         $context
 879                                                                 ),
 880                                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 881                                                         'hits' => $hits,
 882                                                 ];
 883                                         }
 884                                 }
 885
 886                                 // Instead of sorting by hit count (disabled, see above), sort by display name
 887                                 usort( $result, function ( $a, $b ) {
 888                                         return strcasecmp( $a['label'], $b['label'] );
 889                                 } );
 890
 891                                 return $result;
 892                         },
 893                         [
 894                                 'lockTSE' => 30
 895                         ]
 896                 );
 897         }
 898
 899         /**
 900          * Add the "no results" message to the output
 901          */
 902         protected function outputNoResults() {
 903                 $this->getOutput()->addHTML(
 904                         '<div class="mw-changeslist-empty">' .
 905                         $this->msg( 'recentchanges-noresult' )->parse() .
 906                         '</div>'
 907                 );
 908         }
 909
 910         /**
 911          * Add the "timeout" message to the output
 912          */
 913         protected function outputTimeout() {
 914                 $this->getOutput()->addHTML(
 915                         '<div class="mw-changeslist-empty mw-changeslist-timeout">' .
 916                         $this->msg( 'recentchanges-timeout' )->parse() .
 917                         '</div>'
 918                 );
 919         }
 920
 921         /**
 922          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 923          *
 924          * @return bool|IResultWrapper Result or false
 925          */
 926         public function getRows() {
 927                 $opts = $this->getOptions();
 928
 929                 $tables = [];
 930                 $fields = [];
 931                 $conds = [];
 932                 $query_options = [];
 933                 $join_conds = [];
 934                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 935
 936                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 937         }
 938
 939         /**
 940          * Get the current FormOptions for this request
 941          *
 942          * @return FormOptions
 943          */
 944         public function getOptions() {
 945                 if ( $this->rcOptions === null ) {
 946                         $this->rcOptions = $this->setup( $this->rcSubpage );
 947                 }
 948
 949                 return $this->rcOptions;
 950         }
 951
 952         /**
 953          * Register all filters and their groups (including those from hooks), plus handle
 954          * conflicts and defaults.
 955          *
 956          * You might want to customize these in the same method, in subclasses.  You can
 957          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 958          * filter, then make necessary modfications to the filter or group (e.g. with
 959          * setDefault).
 960          */
 961         protected function registerFilters() {
 962                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 963
 964                 // Make sure this is not being transcluded (we don't want to show this
 965                 // information to all users just because the user that saves the edit can
 966                 // patrol or is logged in)
 967                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 968                         $this->registerFiltersFromDefinitions( $this->legacyReviewStatusFilterGroupDefinition );
 969                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 970                 }
 971
 972                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 973
 974                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 975                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 976                                 $this->hideCategorizationFilterDefinition
 977                         );
 978
 979                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 980
 981                         $hideCategorization = new ChangesListBooleanFilter(
 982                                 $transformedHideCategorizationDef
 983                         );
 984                 }
 985
 986                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 987
 988                 $this->registerFiltersFromDefinitions( [] );
 989
 990                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
 991                 $registered = $userExperienceLevel->getFilter( 'registered' );
 992                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
 993                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
 994                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
 995
 996                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
 997                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
 998                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
 999
1000                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
1001                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
1002
1003                 // categoryFilter is conditional; see registerFilters
1004                 if ( $categoryFilter !== null ) {
1005                         $hideMinorFilter->conflictsWith(
1006                                 $categoryFilter,
1007                                 'rcfilters-hideminor-conflicts-typeofchange-global',
1008                                 'rcfilters-hideminor-conflicts-typeofchange',
1009                                 'rcfilters-typeofchange-conflicts-hideminor'
1010                         );
1011                 }
1012                 $hideMinorFilter->conflictsWith(
1013                         $logactionsFilter,
1014                         'rcfilters-hideminor-conflicts-typeofchange-global',
1015                         'rcfilters-hideminor-conflicts-typeofchange',
1016                         'rcfilters-typeofchange-conflicts-hideminor'
1017                 );
1018                 $hideMinorFilter->conflictsWith(
1019                         $pagecreationFilter,
1020                         'rcfilters-hideminor-conflicts-typeofchange-global',
1021                         'rcfilters-hideminor-conflicts-typeofchange',
1022                         'rcfilters-typeofchange-conflicts-hideminor'
1023                 );
1024         }
1025
1026         /**
1027          * Transforms filter definition to prepare it for constructor.
1028          *
1029          * See overrides of this method as well.
1030          *
1031          * @param array $filterDefinition Original filter definition
1032          *
1033          * @return array Transformed definition
1034          */
1035         protected function transformFilterDefinition( array $filterDefinition ) {
1036                 return $filterDefinition;
1037         }
1038
1039         /**
1040          * Register filters from a definition object
1041          *
1042          * Array specifying groups and their filters; see Filter and
1043          * ChangesListFilterGroup constructors.
1044          *
1045          * There is light processing to simplify core maintenance.
1046          * @param array $definition
1047          */
1048         protected function registerFiltersFromDefinitions( array $definition ) {
1049                 $autoFillPriority = -1;
1050                 foreach ( $definition as $groupDefinition ) {
1051                         if ( !isset( $groupDefinition['priority'] ) ) {
1052                                 $groupDefinition['priority'] = $autoFillPriority;
1053                         } else {
1054                                 // If it's explicitly specified, start over the auto-fill
1055                                 $autoFillPriority = $groupDefinition['priority'];
1056                         }
1057
1058                         $autoFillPriority--;
1059
1060                         $className = $groupDefinition['class'];
1061                         unset( $groupDefinition['class'] );
1062
1063                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
1064                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
1065                         }
1066
1067                         $this->registerFilterGroup( new $className( $groupDefinition ) );
1068                 }
1069         }
1070
1071         /**
1072          * @return array The legacy show/hide toggle filters
1073          */
1074         protected function getLegacyShowHideFilters() {
1075                 $filters = [];
1076                 foreach ( $this->filterGroups as $group ) {
1077                         if ( $group instanceof  ChangesListBooleanFilterGroup ) {
1078                                 foreach ( $group->getFilters() as $key => $filter ) {
1079                                         if ( $filter->displaysOnUnstructuredUi( $this ) ) {
1080                                                 $filters[ $key ] = $filter;
1081                                         }
1082                                 }
1083                         }
1084                 }
1085                 return $filters;
1086         }
1087
1088         /**
1089          * Register all the filters, including legacy hook-driven ones.
1090          * Then create a FormOptions object with options as specified by the user
1091          *
1092          * @param array $parameters
1093          *
1094          * @return FormOptions
1095          */
1096         public function setup( $parameters ) {
1097                 $this->registerFilters();
1098
1099                 $opts = $this->getDefaultOptions();
1100
1101                 $opts = $this->fetchOptionsFromRequest( $opts );
1102
1103                 // Give precedence to subpage syntax
1104                 if ( $parameters !== null ) {
1105                         $this->parseParameters( $parameters, $opts );
1106                 }
1107
1108                 $this->validateOptions( $opts );
1109
1110                 return $opts;
1111         }
1112
1113         /**
1114          * Get a FormOptions object containing the default options. By default, returns
1115          * some basic options.  The filters listed explicitly here are overriden in this
1116          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
1117          * and more) are structured.  Structured filters are overriden in registerFilters.
1118          * not here.
1119          *
1120          * @return FormOptions
1121          */
1122         public function getDefaultOptions() {
1123                 $opts = new FormOptions();
1124                 $structuredUI = $this->isStructuredFilterUiEnabled();
1125                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
1126                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
1127
1128                 /** @var ChangesListFilterGroup $filterGroup */
1129                 foreach ( $this->filterGroups as $filterGroup ) {
1130                         $filterGroup->addOptions( $opts, $useDefaults, $structuredUI );
1131                 }
1132
1133                 $opts->add( 'namespace', '', FormOptions::STRING );
1134                 $opts->add( 'invert', false );
1135                 $opts->add( 'associated', false );
1136                 $opts->add( 'urlversion', 1 );
1137                 $opts->add( 'tagfilter', '' );
1138
1139                 $opts->add( 'days', $this->getDefaultDays(), FormOptions::FLOAT );
1140                 $opts->add( 'limit', $this->getDefaultLimit(), FormOptions::INT );
1141
1142                 $opts->add( 'from', '' );
1143
1144                 return $opts;
1145         }
1146
1147         /**
1148          * Register a structured changes list filter group
1149          *
1150          * @param ChangesListFilterGroup $group
1151          */
1152         public function registerFilterGroup( ChangesListFilterGroup $group ) {
1153                 $groupName = $group->getName();
1154
1155                 $this->filterGroups[$groupName] = $group;
1156         }
1157
1158         /**
1159          * Gets the currently registered filters groups
1160          *
1161          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
1162          */
1163         protected function getFilterGroups() {
1164                 return $this->filterGroups;
1165         }
1166
1167         /**
1168          * Gets a specified ChangesListFilterGroup by name
1169          *
1170          * @param string $groupName Name of group
1171          *
1172          * @return ChangesListFilterGroup|null Group, or null if not registered
1173          */
1174         public function getFilterGroup( $groupName ) {
1175                 return $this->filterGroups[$groupName] ?? null;
1176         }
1177
1178         // Currently, this intentionally only includes filters that display
1179         // in the structured UI.  This can be changed easily, though, if we want
1180         // to include data on filters that use the unstructured UI.  messageKeys is a
1181         // special top-level value, with the value being an array of the message keys to
1182         // send to the client.
1183         /**
1184          * Gets structured filter information needed by JS
1185          *
1186          * @return array Associative array
1187          * * array $return['groups'] Group data
1188          * * array $return['messageKeys'] Array of message keys
1189          */
1190         public function getStructuredFilterJsData() {
1191                 $output = [
1192                         'groups' => [],
1193                         'messageKeys' => [],
1194                 ];
1195
1196                 usort( $this->filterGroups, function ( $a, $b ) {
1197                         return $b->getPriority() <=> $a->getPriority();
1198                 } );
1199
1200                 foreach ( $this->filterGroups as $groupName => $group ) {
1201                         $groupOutput = $group->getJsData( $this );
1202                         if ( $groupOutput !== null ) {
1203                                 $output['messageKeys'] = array_merge(
1204                                         $output['messageKeys'],
1205                                         $groupOutput['messageKeys']
1206                                 );
1207
1208                                 unset( $groupOutput['messageKeys'] );
1209                                 $output['groups'][] = $groupOutput;
1210                         }
1211                 }
1212
1213                 return $output;
1214         }
1215
1216         /**
1217          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1218          *
1219          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1220          *
1221          * @param FormOptions $opts
1222          * @return FormOptions
1223          */
1224         protected function fetchOptionsFromRequest( $opts ) {
1225                 $opts->fetchValuesFromRequest( $this->getRequest() );
1226
1227                 return $opts;
1228         }
1229
1230         /**
1231          * Process $par and put options found in $opts. Used when including the page.
1232          *
1233          * @param string $par
1234          * @param FormOptions $opts
1235          */
1236         public function parseParameters( $par, FormOptions $opts ) {
1237                 $stringParameterNameSet = [];
1238                 $hideParameterNameSet = [];
1239
1240                 // URL parameters can be per-group, like 'userExpLevel',
1241                 // or per-filter, like 'hideminor'.
1242
1243                 foreach ( $this->filterGroups as $filterGroup ) {
1244                         if ( $filterGroup instanceof ChangesListStringOptionsFilterGroup ) {
1245                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1246                         } elseif ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1247                                 foreach ( $filterGroup->getFilters() as $filter ) {
1248                                         $hideParameterNameSet[$filter->getName()] = true;
1249                                 }
1250                         }
1251                 }
1252
1253                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1254                 foreach ( $bits as $bit ) {
1255                         $m = [];
1256                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1257                                 // hidefoo => hidefoo=true
1258                                 $opts[$bit] = true;
1259                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1260                                 // foo => hidefoo=false
1261                                 $opts["hide$bit"] = false;
1262                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1263                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1264                                         $opts[$m[1]] = $m[2];
1265                                 }
1266                         }
1267                 }
1268         }
1269
1270         /**
1271          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1272          *
1273          * @param FormOptions $opts
1274          */
1275         public function validateOptions( FormOptions $opts ) {
1276                 $isContradictory = $this->fixContradictoryOptions( $opts );
1277                 $isReplaced = $this->replaceOldOptions( $opts );
1278
1279                 if ( $isContradictory || $isReplaced ) {
1280                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1281                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1282                 }
1283
1284                 $opts->validateIntBounds( 'limit', 0, 5000 );
1285                 $opts->validateBounds( 'days', 0, $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
1286         }
1287
1288         /**
1289          * Fix invalid options by resetting pairs that should never appear together.
1290          *
1291          * @param FormOptions $opts
1292          * @return bool True if any option was reset
1293          */
1294         private function fixContradictoryOptions( FormOptions $opts ) {
1295                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1296
1297                 foreach ( $this->filterGroups as $filterGroup ) {
1298                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1299                                 $filters = $filterGroup->getFilters();
1300
1301                                 if ( count( $filters ) === 1 ) {
1302                                         // legacy boolean filters should not be considered
1303                                         continue;
1304                                 }
1305
1306                                 $allInGroupEnabled = array_reduce(
1307                                         $filters,
1308                                         function ( $carry, $filter ) use ( $opts ) {
1309                                                 return $carry && $opts[ $filter->getName() ];
1310                                         },
1311                                         /* initialValue */ count( $filters ) > 0
1312                                 );
1313
1314                                 if ( $allInGroupEnabled ) {
1315                                         foreach ( $filters as $filter ) {
1316                                                 $opts[ $filter->getName() ] = false;
1317                                         }
1318
1319                                         $fixed = true;
1320                                 }
1321                         }
1322                 }
1323
1324                 return $fixed;
1325         }
1326
1327         /**
1328          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1329          * compatibility.
1330          *
1331          * This is deprecated and may be removed.
1332          *
1333          * @param FormOptions $opts
1334          * @return bool True if this change was mode
1335          */
1336         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1337                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1338                         $opts->reset( 'hideanons' );
1339                         if ( !$opts['hidebots'] ) {
1340                                 $opts->reset( 'hideliu' );
1341                                 $opts['hidehumans'] = 1;
1342                         }
1343
1344                         return true;
1345                 }
1346
1347                 return false;
1348         }
1349
1350         /**
1351          * Replace old options with their structured UI equivalents
1352          *
1353          * @param FormOptions $opts
1354          * @return bool True if the change was made
1355          */
1356         public function replaceOldOptions( FormOptions $opts ) {
1357                 if ( !$this->isStructuredFilterUiEnabled() ) {
1358                         return false;
1359                 }
1360
1361                 $changed = false;
1362
1363                 // At this point 'hideanons' and 'hideliu' cannot be both true,
1364                 // because fixBackwardsCompatibilityOptions resets (at least) 'hideanons' in such case
1365                 if ( $opts[ 'hideanons' ] ) {
1366                         $opts->reset( 'hideanons' );
1367                         $opts[ 'userExpLevel' ] = 'registered';
1368                         $changed = true;
1369                 }
1370
1371                 if ( $opts[ 'hideliu' ] ) {
1372                         $opts->reset( 'hideliu' );
1373                         $opts[ 'userExpLevel' ] = 'unregistered';
1374                         $changed = true;
1375                 }
1376
1377                 if ( $this->getFilterGroup( 'legacyReviewStatus' ) ) {
1378                         if ( $opts[ 'hidepatrolled' ] ) {
1379                                 $opts->reset( 'hidepatrolled' );
1380                                 $opts[ 'reviewStatus' ] = 'unpatrolled';
1381                                 $changed = true;
1382                         }
1383
1384                         if ( $opts[ 'hideunpatrolled' ] ) {
1385                                 $opts->reset( 'hideunpatrolled' );
1386                                 $opts[ 'reviewStatus' ] = implode(
1387                                         ChangesListStringOptionsFilterGroup::SEPARATOR,
1388                                         [ 'manual', 'auto' ]
1389                                 );
1390                                 $changed = true;
1391                         }
1392                 }
1393
1394                 return $changed;
1395         }
1396
1397         /**
1398          * Convert parameters values from true/false to 1/0
1399          * so they are not omitted by wfArrayToCgi()
1400          * T38524
1401          *
1402          * @param array $params
1403          * @return array
1404          */
1405         protected function convertParamsForLink( $params ) {
1406                 foreach ( $params as &$value ) {
1407                         if ( $value === false ) {
1408                                 $value = '0';
1409                         }
1410                 }
1411                 unset( $value );
1412                 return $params;
1413         }
1414
1415         /**
1416          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1417          * the user requested.
1418          *
1419          * @param array &$tables Array of tables; see IDatabase::select $table
1420          * @param array &$fields Array of fields; see IDatabase::select $vars
1421          * @param array &$conds Array of conditions; see IDatabase::select $conds
1422          * @param array &$query_options Array of query options; see IDatabase::select $options
1423          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1424          * @param FormOptions $opts
1425          */
1426         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1427                 &$join_conds, FormOptions $opts
1428         ) {
1429                 $dbr = $this->getDB();
1430                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1431
1432                 /** @var ChangesListFilterGroup $filterGroup */
1433                 foreach ( $this->filterGroups as $filterGroup ) {
1434                         $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1435                                 $query_options, $join_conds, $opts, $isStructuredUI );
1436                 }
1437
1438                 // Namespace filtering
1439                 if ( $opts[ 'namespace' ] !== '' ) {
1440                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1441
1442                         if ( $opts[ 'associated' ] ) {
1443                                 $associatedNamespaces = array_map(
1444                                         function ( $ns ) {
1445                                                 return MWNamespace::getAssociated( $ns );
1446                                         },
1447                                         $namespaces
1448                                 );
1449                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1450                         }
1451
1452                         if ( count( $namespaces ) === 1 ) {
1453                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1454                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1455                         } else {
1456                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1457                                 sort( $namespaces );
1458                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1459                         }
1460                         $conds[] = "rc_namespace $operator $value";
1461                 }
1462
1463                 // Calculate cutoff
1464                 $cutoff_unixtime = time() - $opts['days'] * 3600 * 24;
1465                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
1466
1467                 $fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
1468                 if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
1469                         $cutoff = $dbr->timestamp( $opts['from'] );
1470                 } else {
1471                         $opts->reset( 'from' );
1472                 }
1473
1474                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
1475         }
1476
1477         /**
1478          * Process the query
1479          *
1480          * @param array $tables Array of tables; see IDatabase::select $table
1481          * @param array $fields Array of fields; see IDatabase::select $vars
1482          * @param array $conds Array of conditions; see IDatabase::select $conds
1483          * @param array $query_options Array of query options; see IDatabase::select $options
1484          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1485          * @param FormOptions $opts
1486          * @return bool|IResultWrapper Result or false
1487          */
1488         protected function doMainQuery( $tables, $fields, $conds,
1489                 $query_options, $join_conds, FormOptions $opts
1490         ) {
1491                 $rcQuery = RecentChange::getQueryInfo();
1492                 $tables = array_merge( $tables, $rcQuery['tables'] );
1493                 $fields = array_merge( $rcQuery['fields'], $fields );
1494                 $join_conds = array_merge( $join_conds, $rcQuery['joins'] );
1495
1496                 ChangeTags::modifyDisplayQuery(
1497                         $tables,
1498                         $fields,
1499                         $conds,
1500                         $join_conds,
1501                         $query_options,
1502                         ''
1503                 );
1504
1505                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1506                         $opts )
1507                 ) {
1508                         return false;
1509                 }
1510
1511                 $dbr = $this->getDB();
1512
1513                 return $dbr->select(
1514                         $tables,
1515                         $fields,
1516                         $conds,
1517                         __METHOD__,
1518                         $query_options,
1519                         $join_conds
1520                 );
1521         }
1522
1523         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1524                 &$query_options, &$join_conds, $opts
1525         ) {
1526                 return Hooks::run(
1527                         'ChangesListSpecialPageQuery',
1528                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1529                 );
1530         }
1531
1532         /**
1533          * Return a IDatabase object for reading
1534          *
1535          * @return IDatabase
1536          */
1537         protected function getDB() {
1538                 return wfGetDB( DB_REPLICA );
1539         }
1540
1541         /**
1542          * Send header output to the OutputPage object, only called if not using feeds
1543          *
1544          * @param int $rowCount Number of database rows
1545          * @param FormOptions $opts
1546          */
1547         private function webOutputHeader( $rowCount, $opts ) {
1548                 if ( !$this->including() ) {
1549                         $this->outputFeedLinks();
1550                         $this->doHeader( $opts, $rowCount );
1551                 }
1552         }
1553
1554         /**
1555          * Send output to the OutputPage object, only called if not used feeds
1556          *
1557          * @param IResultWrapper $rows Database rows
1558          * @param FormOptions $opts
1559          */
1560         public function webOutput( $rows, $opts ) {
1561                 $this->webOutputHeader( $rows->numRows(), $opts );
1562
1563                 $this->outputChangesList( $rows, $opts );
1564         }
1565
1566         /**
1567          * Output feed links.
1568          */
1569         public function outputFeedLinks() {
1570                 // nothing by default
1571         }
1572
1573         /**
1574          * Build and output the actual changes list.
1575          *
1576          * @param IResultWrapper $rows Database rows
1577          * @param FormOptions $opts
1578          */
1579         abstract public function outputChangesList( $rows, $opts );
1580
1581         /**
1582          * Set the text to be displayed above the changes
1583          *
1584          * @param FormOptions $opts
1585          * @param int $numRows Number of rows in the result to show after this header
1586          */
1587         public function doHeader( $opts, $numRows ) {
1588                 $this->setTopText( $opts );
1589
1590                 // @todo Lots of stuff should be done here.
1591
1592                 $this->setBottomText( $opts );
1593         }
1594
1595         /**
1596          * Send the text to be displayed before the options.
1597          * Should use $this->getOutput()->addWikiTextAsInterface()
1598          * or similar methods to print the text.
1599          *
1600          * @param FormOptions $opts
1601          */
1602         public function setTopText( FormOptions $opts ) {
1603                 // nothing by default
1604         }
1605
1606         /**
1607          * Send the text to be displayed after the options.
1608          * Should use $this->getOutput()->addWikiTextAsInterface()
1609          * or similar methods to print the text.
1610          *
1611          * @param FormOptions $opts
1612          */
1613         public function setBottomText( FormOptions $opts ) {
1614                 // nothing by default
1615         }
1616
1617         /**
1618          * Get options to be displayed in a form
1619          * @todo This should handle options returned by getDefaultOptions().
1620          * @todo Not called by anything in this class (but is in subclasses), should be
1621          * called by something… doHeader() maybe?
1622          *
1623          * @param FormOptions $opts
1624          * @return array
1625          */
1626         public function getExtraOptions( $opts ) {
1627                 return [];
1628         }
1629
1630         /**
1631          * Return the legend displayed within the fieldset
1632          *
1633          * @return string
1634          */
1635         public function makeLegend() {
1636                 $context = $this->getContext();
1637                 $user = $context->getUser();
1638                 # The legend showing what the letters and stuff mean
1639                 $legend = Html::openElement( 'dl' ) . "\n";
1640                 # Iterates through them and gets the messages for both letter and tooltip
1641                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1642                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1643                         unset( $legendItems['unpatrolled'] );
1644                 }
1645                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1646                         $label = $item['legend'] ?? $item['title'];
1647                         $letter = $item['letter'];
1648                         $cssClass = $item['class'] ?? $key;
1649
1650                         $legend .= Html::element( 'dt',
1651                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1652                         ) . "\n" .
1653                         Html::rawElement( 'dd',
1654                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1655                                 $context->msg( $label )->parse()
1656                         ) . "\n";
1657                 }
1658                 # (+-123)
1659                 $legend .= Html::rawElement( 'dt',
1660                         [ 'class' => 'mw-plusminus-pos' ],
1661                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1662                 ) . "\n";
1663                 $legend .= Html::element(
1664                         'dd',
1665                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1666                         $context->msg( 'recentchanges-label-plusminus' )->text()
1667                 ) . "\n";
1668                 $legend .= Html::closeElement( 'dl' ) . "\n";
1669
1670                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1671                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1672                         $context->msg( 'recentchanges-legend-heading' )->parse();
1673
1674                 # Collapsible
1675                 $collapsedState = $this->getRequest()->getCookie( 'changeslist-state' );
1676                 $collapsedClass = $collapsedState === 'collapsed' ? ' mw-collapsed' : '';
1677
1678                 $legend =
1679                         '<div class="mw-changeslist-legend mw-collapsible' . $collapsedClass . '">' .
1680                                 $legendHeading .
1681                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1682                         '</div>';
1683
1684                 return $legend;
1685         }
1686
1687         /**
1688          * Add page-specific modules.
1689          */
1690         protected function addModules() {
1691                 $out = $this->getOutput();
1692                 // Styles and behavior for the legend box (see makeLegend())
1693                 $out->addModuleStyles( [
1694                         'mediawiki.special.changeslist.legend',
1695                         'mediawiki.special.changeslist',
1696                 ] );
1697                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1698
1699                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
1700                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1701                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1702                 }
1703         }
1704
1705         protected function getGroupName() {
1706                 return 'changes';
1707         }
1708
1709         /**
1710          * Filter on users' experience levels; this will not be called if nothing is
1711          * selected.
1712          *
1713          * @param string $specialPageClassName Class name of current special page
1714          * @param IContextSource $context Context, for e.g. user
1715          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1716          * @param array &$tables Array of tables; see IDatabase::select $table
1717          * @param array &$fields Array of fields; see IDatabase::select $vars
1718          * @param array &$conds Array of conditions; see IDatabase::select $conds
1719          * @param array &$query_options Array of query options; see IDatabase::select $options
1720          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1721          * @param array $selectedExpLevels The allowed active values, sorted
1722          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1723          *   (optional)
1724          */
1725         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1726                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1727         ) {
1728                 global $wgLearnerEdits,
1729                         $wgExperiencedUserEdits,
1730                         $wgLearnerMemberSince,
1731                         $wgExperiencedUserMemberSince;
1732
1733                 $LEVEL_COUNT = 5;
1734
1735                 // If all levels are selected, don't filter
1736                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1737                         return;
1738                 }
1739
1740                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1741                 if (
1742                         in_array( 'registered', $selectedExpLevels ) &&
1743                         in_array( 'unregistered', $selectedExpLevels )
1744                 ) {
1745                         return;
1746                 }
1747
1748                 $actorMigration = ActorMigration::newMigration();
1749                 $actorQuery = $actorMigration->getJoin( 'rc_user' );
1750                 $tables += $actorQuery['tables'];
1751                 $join_conds += $actorQuery['joins'];
1752
1753                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1754                 if (
1755                         in_array( 'registered', $selectedExpLevels ) &&
1756                         !in_array( 'unregistered', $selectedExpLevels )
1757                 ) {
1758                         $conds[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1759                         return;
1760                 }
1761
1762                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1763                         $conds[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1764                         return;
1765                 }
1766
1767                 $tables[] = 'user';
1768                 $join_conds['user'] = [ 'LEFT JOIN', $actorQuery['fields']['rc_user'] . ' = user_id' ];
1769
1770                 if ( $now === 0 ) {
1771                         $now = time();
1772                 }
1773                 $secondsPerDay = 86400;
1774                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1775                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1776
1777                 $aboveNewcomer = $dbr->makeList(
1778                         [
1779                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1780                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1781                         ],
1782                         IDatabase::LIST_AND
1783                 );
1784
1785                 $aboveLearner = $dbr->makeList(
1786                         [
1787                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1788                                 'user_registration <= ' .
1789                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1790                         ],
1791                         IDatabase::LIST_AND
1792                 );
1793
1794                 $conditions = [];
1795
1796                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1797                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1798                         $conditions[] = $actorMigration->isAnon( $actorQuery['fields']['rc_user'] );
1799                 }
1800
1801                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1802                         $conditions[] = "NOT ( $aboveNewcomer )";
1803                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1804                         $conditions[] = $dbr->makeList(
1805                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1806                                 IDatabase::LIST_AND
1807                         );
1808                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1809                         $conditions[] = $aboveLearner;
1810                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1811                         $conditions[] = "NOT ( $aboveLearner )";
1812                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1813                         $conditions[] = $dbr->makeList(
1814                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1815                                 IDatabase::LIST_OR
1816                         );
1817                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1818                         $conditions[] = $aboveNewcomer;
1819                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1820                         $conditions[] = $actorMigration->isNotAnon( $actorQuery['fields']['rc_user'] );
1821                 }
1822
1823                 if ( count( $conditions ) > 1 ) {
1824                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1825                 } elseif ( count( $conditions ) === 1 ) {
1826                         $conds[] = reset( $conditions );
1827                 }
1828         }
1829
1830         /**
1831          * Check whether the structured filter UI is enabled
1832          *
1833          * @return bool
1834          */
1835         public function isStructuredFilterUiEnabled() {
1836                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1837                         return true;
1838                 }
1839
1840                 return static::checkStructuredFilterUiEnabled(
1841                         $this->getConfig(),
1842                         $this->getUser()
1843                 );
1844         }
1845
1846         /**
1847          * Static method to check whether StructuredFilter UI is enabled for the given user
1848          *
1849          * @since 1.31
1850          * @param Config $config
1851          * @param User $user
1852          * @return bool
1853          */
1854         public static function checkStructuredFilterUiEnabled( Config $config, User $user ) {
1855                 return !$user->getOption( 'rcenhancedfilters-disable' );
1856         }
1857
1858         /**
1859          * Get the default value of the number of changes to display when loading
1860          * the result set.
1861          *
1862          * @since 1.30
1863          * @return int
1864          */
1865         public function getDefaultLimit() {
1866                 return $this->getUser()->getIntOption( static::$limitPreferenceName );
1867         }
1868
1869         /**
1870          * Get the default value of the number of days to display when loading
1871          * the result set.
1872          * Supports fractional values, and should be cast to a float.
1873          *
1874          * @since 1.30
1875          * @return float
1876          */
1877         public function getDefaultDays() {
1878                 return floatval( $this->getUser()->getOption( static::$daysPreferenceName ) );
1879         }
1880 }