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