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