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