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
 576                                 if ( $this->getUser()->isAnon() !==
 577                                         $this->getRequest()->getFuzzyBool( 'isAnon' )
 578                                 ) {
 579                                         $this->getOutput()->setStatusCode( 205 );
 580                                 }
 581
 582                                 return;
 583                         }
 584
 585                         $batch = new LinkBatch;
 586                         foreach ( $rows as $row ) {
 587                                 $batch->add( NS_USER, $row->rc_user_text );
 588                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 589                                 $batch->add( $row->rc_namespace, $row->rc_title );
 590                                 if ( $row->rc_source === RecentChange::SRC_LOG ) {
 591                                         $formatter = LogFormatter::newFromRow( $row );
 592                                         foreach ( $formatter->getPreloadTitles() as $title ) {
 593                                                 $batch->addObj( $title );
 594                                         }
 595                                 }
 596                         }
 597                         $batch->execute();
 598
 599                         $this->setHeaders();
 600                         $this->outputHeader();
 601                         $this->addModules();
 602                         $this->webOutput( $rows, $opts );
 603
 604                         $rows->free();
 605                 } catch ( DBQueryTimeoutError $timeoutException ) {
 606                         MWExceptionHandler::logException( $timeoutException );
 607
 608                         $this->setHeaders();
 609                         $this->outputHeader();
 610                         $this->addModules();
 611
 612                         $this->getOutput()->setStatusCode( 500 );
 613                         $this->webOutputHeader( 0, $opts );
 614                         $this->outputTimeout();
 615                 }
 616
 617                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 618                         // Clean up any bad page entries for titles showing up in RC
 619                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 620                                 $this->getDB(),
 621                                 LoggerFactory::getInstance( 'objectcache' )
 622                         ) );
 623                 }
 624
 625                 $this->includeRcFiltersApp();
 626         }
 627
 628         /**
 629          * Check whether or not the page should load defaults, and if so, whether
 630          * a default saved query is relevant to be redirected to. If it is relevant,
 631          * redirect properly with all necessary query parameters.
 632          */
 633         protected function considerActionsForDefaultSavedQuery() {
 634                 if ( !$this->isStructuredFilterUiEnabled() || $this->including() ) {
 635                         return;
 636                 }
 637
 638                 $knownParams = call_user_func_array(
 639                         [ $this->getRequest(), 'getValues' ],
 640                         array_keys( $this->getOptions()->getAllValues() )
 641                 );
 642
 643                 // HACK: Temporarily until we can properly define "sticky" filters and parameters,
 644                 // we need to exclude several parameters we know should not be counted towards preventing
 645                 // the loading of defaults.
 646                 $excludedParams = [ 'limit' => '', 'days' => '', 'enhanced' => '', 'from' => '' ];
 647                 $knownParams = array_diff_key( $knownParams, $excludedParams );
 648
 649                 if (
 650                         // If there are NO known parameters in the URL request
 651                         // (that are not excluded) then we need to check into loading
 652                         // the default saved query
 653                         count( $knownParams ) === 0
 654                 ) {
 655                         // Get the saved queries data and parse it
 656                         $savedQueries = FormatJson::decode(
 657                                 $this->getUser()->getOption( static::$savedQueriesPreferenceName ),
 658                                 true
 659                         );
 660
 661                         if ( $savedQueries && isset( $savedQueries[ 'default' ] ) ) {
 662                                 // Only load queries that are 'version' 2, since those
 663                                 // have parameter representation
 664                                 if ( isset( $savedQueries[ 'version' ] ) && $savedQueries[ 'version' ] === '2' ) {
 665                                         $savedQueryDefaultID = $savedQueries[ 'default' ];
 666                                         $defaultQuery = $savedQueries[ 'queries' ][ $savedQueryDefaultID ][ 'data' ];
 667
 668                                         // Build the entire parameter list
 669                                         $query = array_merge(
 670                                                 $defaultQuery[ 'params' ],
 671                                                 $defaultQuery[ 'highlights' ],
 672                                                 [
 673                                                         'urlversion' => '2',
 674                                                 ]
 675                                         );
 676                                         // Add to the query any parameters that we may have ignored before
 677                                         // but are still valid and requested in the URL
 678                                         $query = array_merge( $this->getRequest()->getValues(), $query );
 679                                         unset( $query[ 'title' ] );
 680                                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
 681                                 } else {
 682                                         // There's a default, but the version is not 2, and the server can't
 683                                         // actually recognize the query itself. This happens if it is before
 684                                         // the conversion, so we need to tell the UI to reload saved query as
 685                                         // it does the conversion to version 2
 686                                         $this->getOutput()->addJsConfigVars(
 687                                                 'wgStructuredChangeFiltersDefaultSavedQueryExists',
 688                                                 true
 689                                         );
 690
 691                                         // Add the class that tells the frontend it is still loading
 692                                         // another query
 693                                         $this->getOutput()->addBodyClasses( 'mw-rcfilters-ui-loading' );
 694                                 }
 695                         }
 696                 }
 697         }
 698
 699         /**
 700          * Include the modules and configuration for the RCFilters app.
 701          * Conditional on the user having the feature enabled.
 702          *
 703          * If it is disabled, add a <body> class marking that
 704          */
 705         protected function includeRcFiltersApp() {
 706                 $out = $this->getOutput();
 707                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
 708                         $jsData = $this->getStructuredFilterJsData();
 709
 710                         $messages = [];
 711                         foreach ( $jsData['messageKeys'] as $key ) {
 712                                 $messages[$key] = $this->msg( $key )->plain();
 713                         }
 714
 715                         $out->addBodyClasses( 'mw-rcfilters-enabled' );
 716
 717                         $out->addHTML(
 718                                 ResourceLoader::makeInlineScript(
 719                                         ResourceLoader::makeMessageSetScript( $messages )
 720                                 )
 721                         );
 722
 723                         $out->addJsConfigVars( 'wgStructuredChangeFilters', $jsData['groups'] );
 724
 725                         $out->addJsConfigVars(
 726                                 'wgRCFiltersChangeTags',
 727                                 $this->getChangeTagList()
 728                         );
 729                         $out->addJsConfigVars(
 730                                 'StructuredChangeFiltersDisplayConfig',
 731                                 [
 732                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 733                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 734                                         'limitDefault' => $this->getDefaultLimit(),
 735                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 736                                         'daysDefault' => $this->getDefaultDays(),
 737                                 ]
 738                         );
 739
 740                         $out->addJsConfigVars(
 741                                 'wgStructuredChangeFiltersSavedQueriesPreferenceName',
 742                                 static::$savedQueriesPreferenceName
 743                         );
 744                         $out->addJsConfigVars(
 745                                 'wgStructuredChangeFiltersLimitPreferenceName',
 746                                 static::$limitPreferenceName
 747                         );
 748                         $out->addJsConfigVars(
 749                                 'wgStructuredChangeFiltersDaysPreferenceName',
 750                                 static::$daysPreferenceName
 751                         );
 752
 753                         $out->addJsConfigVars(
 754                                 'StructuredChangeFiltersLiveUpdatePollingRate',
 755                                 $this->getConfig()->get( 'StructuredChangeFiltersLiveUpdatePollingRate' )
 756                         );
 757                 } else {
 758                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 759                 }
 760         }
 761
 762         /**
 763          * Fetch the change tags list for the front end
 764          *
 765          * @return Array Tag data
 766          */
 767         protected function getChangeTagList() {
 768                 $cache = ObjectCache::getMainWANInstance();
 769                 $context = $this->getContext();
 770                 return $cache->getWithSetCallback(
 771                         $cache->makeKey( 'changeslistspecialpage-changetags', $context->getLanguage()->getCode() ),
 772                         $cache::TTL_MINUTE * 10,
 773                         function () use ( $context ) {
 774                                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 775                                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 776
 777                                 // Hit counts disabled for perf reasons, see T169997
 778                                 /*
 779                                 $tagStats = ChangeTags::tagUsageStatistics();
 780                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 781
 782                                 // Sort by hits
 783                                 arsort( $tagHitCounts );
 784                                 */
 785                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags );
 786
 787                                 // Build the list and data
 788                                 $result = [];
 789                                 foreach ( $tagHitCounts as $tagName => $hits ) {
 790                                         if (
 791                                                 // Only get active tags
 792                                                 isset( $explicitlyDefinedTags[ $tagName ] ) ||
 793                                                 isset( $softwareActivatedTags[ $tagName ] )
 794                                         ) {
 795                                                 // Parse description
 796                                                 $desc = ChangeTags::tagLongDescriptionMessage( $tagName, $context );
 797
 798                                                 $result[] = [
 799                                                         'name' => $tagName,
 800                                                         'label' => Sanitizer::stripAllTags(
 801                                                                 ChangeTags::tagDescription( $tagName, $context )
 802                                                         ),
 803                                                         'description' => $desc ? Sanitizer::stripAllTags( $desc->parse() ) : '',
 804                                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 805                                                         'hits' => $hits,
 806                                                 ];
 807                                         }
 808                                 }
 809
 810                                 // Instead of sorting by hit count (disabled, see above), sort by display name
 811                                 usort( $result, function ( $a, $b ) {
 812                                         return strcasecmp( $a['label'], $b['label'] );
 813                                 } );
 814
 815                                 return $result;
 816                         },
 817                         [
 818                                 'lockTSE' => 30
 819                         ]
 820                 );
 821         }
 822
 823         /**
 824          * Add the "no results" message to the output
 825          */
 826         protected function outputNoResults() {
 827                 $this->getOutput()->addHTML(
 828                         '<div class="mw-changeslist-empty">' .
 829                         $this->msg( 'recentchanges-noresult' )->parse() .
 830                         '</div>'
 831                 );
 832         }
 833
 834         /**
 835          * Add the "timeout" message to the output
 836          */
 837         protected function outputTimeout() {
 838                 $this->getOutput()->addHTML(
 839                         '<div class="mw-changeslist-timeout">' .
 840                         $this->msg( 'recentchanges-timeout' )->parse() .
 841                         '</div>'
 842                 );
 843         }
 844
 845         /**
 846          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 847          *
 848          * @return bool|ResultWrapper Result or false
 849          */
 850         public function getRows() {
 851                 $opts = $this->getOptions();
 852
 853                 $tables = [];
 854                 $fields = [];
 855                 $conds = [];
 856                 $query_options = [];
 857                 $join_conds = [];
 858                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 859
 860                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 861         }
 862
 863         /**
 864          * Get the current FormOptions for this request
 865          *
 866          * @return FormOptions
 867          */
 868         public function getOptions() {
 869                 if ( $this->rcOptions === null ) {
 870                         $this->rcOptions = $this->setup( $this->rcSubpage );
 871                 }
 872
 873                 return $this->rcOptions;
 874         }
 875
 876         /**
 877          * Register all filters and their groups (including those from hooks), plus handle
 878          * conflicts and defaults.
 879          *
 880          * You might want to customize these in the same method, in subclasses.  You can
 881          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 882          * filter, then make necessary modfications to the filter or group (e.g. with
 883          * setDefault).
 884          */
 885         protected function registerFilters() {
 886                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 887
 888                 // Make sure this is not being transcluded (we don't want to show this
 889                 // information to all users just because the user that saves the edit can
 890                 // patrol or is logged in)
 891                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 892                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 893                 }
 894
 895                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 896
 897                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 898                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 899                                 $this->hideCategorizationFilterDefinition
 900                         );
 901
 902                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 903
 904                         $hideCategorization = new ChangesListBooleanFilter(
 905                                 $transformedHideCategorizationDef
 906                         );
 907                 }
 908
 909                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 910
 911                 $unstructuredGroupDefinition =
 912                         $this->getFilterGroupDefinitionFromLegacyCustomFilters(
 913                                 $this->getCustomFilters()
 914                         );
 915                 $this->registerFiltersFromDefinitions( [ $unstructuredGroupDefinition ] );
 916
 917                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
 918                 $registered = $userExperienceLevel->getFilter( 'registered' );
 919                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
 920                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
 921                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
 922
 923                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
 924                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
 925                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
 926
 927                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
 928                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
 929
 930                 // categoryFilter is conditional; see registerFilters
 931                 if ( $categoryFilter !== null ) {
 932                         $hideMinorFilter->conflictsWith(
 933                                 $categoryFilter,
 934                                 'rcfilters-hideminor-conflicts-typeofchange-global',
 935                                 'rcfilters-hideminor-conflicts-typeofchange',
 936                                 'rcfilters-typeofchange-conflicts-hideminor'
 937                         );
 938                 }
 939                 $hideMinorFilter->conflictsWith(
 940                         $logactionsFilter,
 941                         'rcfilters-hideminor-conflicts-typeofchange-global',
 942                         'rcfilters-hideminor-conflicts-typeofchange',
 943                         'rcfilters-typeofchange-conflicts-hideminor'
 944                 );
 945                 $hideMinorFilter->conflictsWith(
 946                         $pagecreationFilter,
 947                         'rcfilters-hideminor-conflicts-typeofchange-global',
 948                         'rcfilters-hideminor-conflicts-typeofchange',
 949                         'rcfilters-typeofchange-conflicts-hideminor'
 950                 );
 951         }
 952
 953         /**
 954          * Transforms filter definition to prepare it for constructor.
 955          *
 956          * See overrides of this method as well.
 957          *
 958          * @param array $filterDefinition Original filter definition
 959          *
 960          * @return array Transformed definition
 961          */
 962         protected function transformFilterDefinition( array $filterDefinition ) {
 963                 return $filterDefinition;
 964         }
 965
 966         /**
 967          * Register filters from a definition object
 968          *
 969          * Array specifying groups and their filters; see Filter and
 970          * ChangesListFilterGroup constructors.
 971          *
 972          * There is light processing to simplify core maintenance.
 973          * @param array $definition
 974          */
 975         protected function registerFiltersFromDefinitions( array $definition ) {
 976                 $autoFillPriority = -1;
 977                 foreach ( $definition as $groupDefinition ) {
 978                         if ( !isset( $groupDefinition['priority'] ) ) {
 979                                 $groupDefinition['priority'] = $autoFillPriority;
 980                         } else {
 981                                 // If it's explicitly specified, start over the auto-fill
 982                                 $autoFillPriority = $groupDefinition['priority'];
 983                         }
 984
 985                         $autoFillPriority--;
 986
 987                         $className = $groupDefinition['class'];
 988                         unset( $groupDefinition['class'] );
 989
 990                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
 991                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
 992                         }
 993
 994                         $this->registerFilterGroup( new $className( $groupDefinition ) );
 995                 }
 996         }
 997
 998         /**
 999          * Get filter group definition from legacy custom filters
1000          *
1001          * @param array $customFilters Custom filters from legacy hooks
1002          * @return array Group definition
1003          */
1004         protected function getFilterGroupDefinitionFromLegacyCustomFilters( array $customFilters ) {
1005                 // Special internal unstructured group
1006                 $unstructuredGroupDefinition = [
1007                         'name' => 'unstructured',
1008                         'class' => ChangesListBooleanFilterGroup::class,
1009                         'priority' => -1, // Won't display in structured
1010                         'filters' => [],
1011                 ];
1012
1013                 foreach ( $customFilters as $name => $params ) {
1014                         $unstructuredGroupDefinition['filters'][] = [
1015                                 'name' => $name,
1016                                 'showHide' => $params['msg'],
1017                                 'default' => $params['default'],
1018                         ];
1019                 }
1020
1021                 return $unstructuredGroupDefinition;
1022         }
1023
1024         /**
1025          * @return array The legacy show/hide toggle filters
1026          */
1027         protected function getLegacyShowHideFilters() {
1028                 $filters = [];
1029                 foreach ( $this->filterGroups as $group ) {
1030                         if ( $group instanceof  ChangesListBooleanFilterGroup ) {
1031                                 foreach ( $group->getFilters() as $key => $filter ) {
1032                                         if ( $filter->displaysOnUnstructuredUi( $this ) ) {
1033                                                 $filters[ $key ] = $filter;
1034                                         }
1035                                 }
1036                         }
1037                 }
1038                 return $filters;
1039         }
1040
1041         /**
1042          * Register all the filters, including legacy hook-driven ones.
1043          * Then create a FormOptions object with options as specified by the user
1044          *
1045          * @param array $parameters
1046          *
1047          * @return FormOptions
1048          */
1049         public function setup( $parameters ) {
1050                 $this->registerFilters();
1051
1052                 $opts = $this->getDefaultOptions();
1053
1054                 $opts = $this->fetchOptionsFromRequest( $opts );
1055
1056                 // Give precedence to subpage syntax
1057                 if ( $parameters !== null ) {
1058                         $this->parseParameters( $parameters, $opts );
1059                 }
1060
1061                 $this->validateOptions( $opts );
1062
1063                 return $opts;
1064         }
1065
1066         /**
1067          * Get a FormOptions object containing the default options. By default, returns
1068          * some basic options.  The filters listed explicitly here are overriden in this
1069          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
1070          * and more) are structured.  Structured filters are overriden in registerFilters.
1071          * not here.
1072          *
1073          * @return FormOptions
1074          */
1075         public function getDefaultOptions() {
1076                 $opts = new FormOptions();
1077                 $structuredUI = $this->isStructuredFilterUiEnabled();
1078                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
1079                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
1080
1081                 /** @var ChangesListFilterGroup $filterGroup */
1082                 foreach ( $this->filterGroups as $filterGroup ) {
1083                         $filterGroup->addOptions( $opts, $useDefaults, $structuredUI );
1084                 }
1085
1086                 $opts->add( 'namespace', '', FormOptions::STRING );
1087                 $opts->add( 'invert', false );
1088                 $opts->add( 'associated', false );
1089                 $opts->add( 'urlversion', 1 );
1090                 $opts->add( 'tagfilter', '' );
1091
1092                 $opts->add( 'days', $this->getDefaultDays(), FormOptions::FLOAT );
1093                 $opts->add( 'limit', $this->getDefaultLimit(), FormOptions::INT );
1094
1095                 $opts->add( 'from', '' );
1096
1097                 return $opts;
1098         }
1099
1100         /**
1101          * Register a structured changes list filter group
1102          *
1103          * @param ChangesListFilterGroup $group
1104          */
1105         public function registerFilterGroup( ChangesListFilterGroup $group ) {
1106                 $groupName = $group->getName();
1107
1108                 $this->filterGroups[$groupName] = $group;
1109         }
1110
1111         /**
1112          * Gets the currently registered filters groups
1113          *
1114          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
1115          */
1116         protected function getFilterGroups() {
1117                 return $this->filterGroups;
1118         }
1119
1120         /**
1121          * Gets a specified ChangesListFilterGroup by name
1122          *
1123          * @param string $groupName Name of group
1124          *
1125          * @return ChangesListFilterGroup|null Group, or null if not registered
1126          */
1127         public function getFilterGroup( $groupName ) {
1128                 return isset( $this->filterGroups[$groupName] ) ?
1129                         $this->filterGroups[$groupName] :
1130                         null;
1131         }
1132
1133         // Currently, this intentionally only includes filters that display
1134         // in the structured UI.  This can be changed easily, though, if we want
1135         // to include data on filters that use the unstructured UI.  messageKeys is a
1136         // special top-level value, with the value being an array of the message keys to
1137         // send to the client.
1138         /**
1139          * Gets structured filter information needed by JS
1140          *
1141          * @return array Associative array
1142          * * array $return['groups'] Group data
1143          * * array $return['messageKeys'] Array of message keys
1144          */
1145         public function getStructuredFilterJsData() {
1146                 $output = [
1147                         'groups' => [],
1148                         'messageKeys' => [],
1149                 ];
1150
1151                 usort( $this->filterGroups, function ( $a, $b ) {
1152                         return $b->getPriority() - $a->getPriority();
1153                 } );
1154
1155                 foreach ( $this->filterGroups as $groupName => $group ) {
1156                         $groupOutput = $group->getJsData( $this );
1157                         if ( $groupOutput !== null ) {
1158                                 $output['messageKeys'] = array_merge(
1159                                         $output['messageKeys'],
1160                                         $groupOutput['messageKeys']
1161                                 );
1162
1163                                 unset( $groupOutput['messageKeys'] );
1164                                 $output['groups'][] = $groupOutput;
1165                         }
1166                 }
1167
1168                 return $output;
1169         }
1170
1171         /**
1172          * Get custom show/hide filters using deprecated ChangesListSpecialPageFilters
1173          * hook.
1174          *
1175          * @return array Map of filter URL param names to properties (msg/default)
1176          */
1177         protected function getCustomFilters() {
1178                 if ( $this->customFilters === null ) {
1179                         $this->customFilters = [];
1180                         Hooks::run( 'ChangesListSpecialPageFilters', [ $this, &$this->customFilters ], '1.29' );
1181                 }
1182
1183                 return $this->customFilters;
1184         }
1185
1186         /**
1187          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1188          *
1189          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1190          *
1191          * @param FormOptions $opts
1192          * @return FormOptions
1193          */
1194         protected function fetchOptionsFromRequest( $opts ) {
1195                 $opts->fetchValuesFromRequest( $this->getRequest() );
1196
1197                 return $opts;
1198         }
1199
1200         /**
1201          * Process $par and put options found in $opts. Used when including the page.
1202          *
1203          * @param string $par
1204          * @param FormOptions $opts
1205          */
1206         public function parseParameters( $par, FormOptions $opts ) {
1207                 $stringParameterNameSet = [];
1208                 $hideParameterNameSet = [];
1209
1210                 // URL parameters can be per-group, like 'userExpLevel',
1211                 // or per-filter, like 'hideminor'.
1212
1213                 foreach ( $this->filterGroups as $filterGroup ) {
1214                         if ( $filterGroup instanceof ChangesListStringOptionsFilterGroup ) {
1215                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1216                         } elseif ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1217                                 foreach ( $filterGroup->getFilters() as $filter ) {
1218                                         $hideParameterNameSet[$filter->getName()] = true;
1219                                 }
1220                         }
1221                 }
1222
1223                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1224                 foreach ( $bits as $bit ) {
1225                         $m = [];
1226                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1227                                 // hidefoo => hidefoo=true
1228                                 $opts[$bit] = true;
1229                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1230                                 // foo => hidefoo=false
1231                                 $opts["hide$bit"] = false;
1232                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1233                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1234                                         $opts[$m[1]] = $m[2];
1235                                 }
1236                         }
1237                 }
1238         }
1239
1240         /**
1241          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1242          *
1243          * @param FormOptions $opts
1244          */
1245         public function validateOptions( FormOptions $opts ) {
1246                 $isContradictory = $this->fixContradictoryOptions( $opts );
1247                 $isReplaced = $this->replaceOldOptions( $opts );
1248
1249                 if ( $isContradictory || $isReplaced ) {
1250                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1251                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1252                 }
1253
1254                 $opts->validateIntBounds( 'limit', 0, 5000 );
1255                 $opts->validateBounds( 'days', 0, $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
1256         }
1257
1258         /**
1259          * Fix invalid options by resetting pairs that should never appear together.
1260          *
1261          * @param FormOptions $opts
1262          * @return bool True if any option was reset
1263          */
1264         private function fixContradictoryOptions( FormOptions $opts ) {
1265                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1266
1267                 foreach ( $this->filterGroups as $filterGroup ) {
1268                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1269                                 $filters = $filterGroup->getFilters();
1270
1271                                 if ( count( $filters ) === 1 ) {
1272                                         // legacy boolean filters should not be considered
1273                                         continue;
1274                                 }
1275
1276                                 $allInGroupEnabled = array_reduce(
1277                                         $filters,
1278                                         function ( $carry, $filter ) use ( $opts ) {
1279                                                 return $carry && $opts[ $filter->getName() ];
1280                                         },
1281                                         /* initialValue */ count( $filters ) > 0
1282                                 );
1283
1284                                 if ( $allInGroupEnabled ) {
1285                                         foreach ( $filters as $filter ) {
1286                                                 $opts[ $filter->getName() ] = false;
1287                                         }
1288
1289                                         $fixed = true;
1290                                 }
1291                         }
1292                 }
1293
1294                 return $fixed;
1295         }
1296
1297         /**
1298          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1299          * compatibility.
1300          *
1301          * This is deprecated and may be removed.
1302          *
1303          * @param FormOptions $opts
1304          * @return bool True if this change was mode
1305          */
1306         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1307                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1308                         $opts->reset( 'hideanons' );
1309                         if ( !$opts['hidebots'] ) {
1310                                 $opts->reset( 'hideliu' );
1311                                 $opts['hidehumans'] = 1;
1312                         }
1313
1314                         return true;
1315                 }
1316
1317                 return false;
1318         }
1319
1320         /**
1321          * Replace old options 'hideanons' or 'hideliu' with structured UI equivalent
1322          *
1323          * @param FormOptions $opts
1324          * @return bool True if the change was made
1325          */
1326         public function replaceOldOptions( FormOptions $opts ) {
1327                 if ( !$this->isStructuredFilterUiEnabled() ) {
1328                         return false;
1329                 }
1330
1331                 // At this point 'hideanons' and 'hideliu' cannot be both true,
1332                 // because fixBackwardsCompatibilityOptions resets (at least) 'hideanons' in such case
1333                 if ( $opts[ 'hideanons' ] ) {
1334                         $opts->reset( 'hideanons' );
1335                         $opts[ 'userExpLevel' ] = 'registered';
1336                         return true;
1337                 }
1338
1339                 if ( $opts[ 'hideliu' ] ) {
1340                         $opts->reset( 'hideliu' );
1341                         $opts[ 'userExpLevel' ] = 'unregistered';
1342                         return true;
1343                 }
1344
1345                 return false;
1346         }
1347
1348         /**
1349          * Convert parameters values from true/false to 1/0
1350          * so they are not omitted by wfArrayToCgi()
1351          * Bug 36524
1352          *
1353          * @param array $params
1354          * @return array
1355          */
1356         protected function convertParamsForLink( $params ) {
1357                 foreach ( $params as &$value ) {
1358                         if ( $value === false ) {
1359                                 $value = '0';
1360                         }
1361                 }
1362                 unset( $value );
1363                 return $params;
1364         }
1365
1366         /**
1367          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1368          * the user requested.
1369          *
1370          * @param array &$tables Array of tables; see IDatabase::select $table
1371          * @param array &$fields Array of fields; see IDatabase::select $vars
1372          * @param array &$conds Array of conditions; see IDatabase::select $conds
1373          * @param array &$query_options Array of query options; see IDatabase::select $options
1374          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1375          * @param FormOptions $opts
1376          */
1377         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1378                 &$join_conds, FormOptions $opts
1379         ) {
1380                 $dbr = $this->getDB();
1381                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1382
1383                 /** @var ChangesListFilterGroup $filterGroup */
1384                 foreach ( $this->filterGroups as $filterGroup ) {
1385                         $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1386                                 $query_options, $join_conds, $opts, $isStructuredUI );
1387                 }
1388
1389                 // Namespace filtering
1390                 if ( $opts[ 'namespace' ] !== '' ) {
1391                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1392
1393                         if ( $opts[ 'associated' ] ) {
1394                                 $associatedNamespaces = array_map(
1395                                         function ( $ns ) {
1396                                                 return MWNamespace::getAssociated( $ns );
1397                                         },
1398                                         $namespaces
1399                                 );
1400                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1401                         }
1402
1403                         if ( count( $namespaces ) === 1 ) {
1404                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1405                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1406                         } else {
1407                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1408                                 sort( $namespaces );
1409                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1410                         }
1411                         $conds[] = "rc_namespace $operator $value";
1412                 }
1413
1414                 // Calculate cutoff
1415                 $cutoff_unixtime = time() - $opts['days'] * 3600 * 24;
1416                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
1417
1418                 $fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
1419                 if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
1420                         $cutoff = $dbr->timestamp( $opts['from'] );
1421                 } else {
1422                         $opts->reset( 'from' );
1423                 }
1424
1425                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
1426         }
1427
1428         /**
1429          * Process the query
1430          *
1431          * @param array $tables Array of tables; see IDatabase::select $table
1432          * @param array $fields Array of fields; see IDatabase::select $vars
1433          * @param array $conds Array of conditions; see IDatabase::select $conds
1434          * @param array $query_options Array of query options; see IDatabase::select $options
1435          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1436          * @param FormOptions $opts
1437          * @return bool|ResultWrapper Result or false
1438          */
1439         protected function doMainQuery( $tables, $fields, $conds,
1440                 $query_options, $join_conds, FormOptions $opts
1441         ) {
1442                 $rcQuery = RecentChange::getQueryInfo();
1443                 $tables = array_merge( $tables, $rcQuery['tables'] );
1444                 $fields = array_merge( $rcQuery['fields'], $fields );
1445                 $join_conds = array_merge( $join_conds, $rcQuery['joins'] );
1446
1447                 ChangeTags::modifyDisplayQuery(
1448                         $tables,
1449                         $fields,
1450                         $conds,
1451                         $join_conds,
1452                         $query_options,
1453                         ''
1454                 );
1455
1456                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1457                         $opts )
1458                 ) {
1459                         return false;
1460                 }
1461
1462                 $dbr = $this->getDB();
1463
1464                 return $dbr->select(
1465                         $tables,
1466                         $fields,
1467                         $conds,
1468                         __METHOD__,
1469                         $query_options,
1470                         $join_conds
1471                 );
1472         }
1473
1474         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1475                 &$query_options, &$join_conds, $opts
1476         ) {
1477                 return Hooks::run(
1478                         'ChangesListSpecialPageQuery',
1479                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1480                 );
1481         }
1482
1483         /**
1484          * Return a IDatabase object for reading
1485          *
1486          * @return IDatabase
1487          */
1488         protected function getDB() {
1489                 return wfGetDB( DB_REPLICA );
1490         }
1491
1492         /**
1493          * Send header output to the OutputPage object, only called if not using feeds
1494          *
1495          * @param int $rowCount Number of database rows
1496          * @param FormOptions $opts
1497          */
1498         private function webOutputHeader( $rowCount, $opts ) {
1499                 if ( !$this->including() ) {
1500                         $this->outputFeedLinks();
1501                         $this->doHeader( $opts, $rowCount );
1502                 }
1503         }
1504
1505         /**
1506          * Send output to the OutputPage object, only called if not used feeds
1507          *
1508          * @param ResultWrapper $rows Database rows
1509          * @param FormOptions $opts
1510          */
1511         public function webOutput( $rows, $opts ) {
1512                 $this->webOutputHeader( $rows->numRows(), $opts );
1513
1514                 $this->outputChangesList( $rows, $opts );
1515         }
1516
1517         /**
1518          * Output feed links.
1519          */
1520         public function outputFeedLinks() {
1521                 // nothing by default
1522         }
1523
1524         /**
1525          * Build and output the actual changes list.
1526          *
1527          * @param ResultWrapper $rows Database rows
1528          * @param FormOptions $opts
1529          */
1530         abstract public function outputChangesList( $rows, $opts );
1531
1532         /**
1533          * Set the text to be displayed above the changes
1534          *
1535          * @param FormOptions $opts
1536          * @param int $numRows Number of rows in the result to show after this header
1537          */
1538         public function doHeader( $opts, $numRows ) {
1539                 $this->setTopText( $opts );
1540
1541                 // @todo Lots of stuff should be done here.
1542
1543                 $this->setBottomText( $opts );
1544         }
1545
1546         /**
1547          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
1548          * or similar methods to print the text.
1549          *
1550          * @param FormOptions $opts
1551          */
1552         public function setTopText( FormOptions $opts ) {
1553                 // nothing by default
1554         }
1555
1556         /**
1557          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
1558          * or similar methods to print the text.
1559          *
1560          * @param FormOptions $opts
1561          */
1562         public function setBottomText( FormOptions $opts ) {
1563                 // nothing by default
1564         }
1565
1566         /**
1567          * Get options to be displayed in a form
1568          * @todo This should handle options returned by getDefaultOptions().
1569          * @todo Not called by anything in this class (but is in subclasses), should be
1570          * called by something… doHeader() maybe?
1571          *
1572          * @param FormOptions $opts
1573          * @return array
1574          */
1575         public function getExtraOptions( $opts ) {
1576                 return [];
1577         }
1578
1579         /**
1580          * Return the legend displayed within the fieldset
1581          *
1582          * @return string
1583          */
1584         public function makeLegend() {
1585                 $context = $this->getContext();
1586                 $user = $context->getUser();
1587                 # The legend showing what the letters and stuff mean
1588                 $legend = Html::openElement( 'dl' ) . "\n";
1589                 # Iterates through them and gets the messages for both letter and tooltip
1590                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1591                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1592                         unset( $legendItems['unpatrolled'] );
1593                 }
1594                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1595                         $label = isset( $item['legend'] ) ? $item['legend'] : $item['title'];
1596                         $letter = $item['letter'];
1597                         $cssClass = isset( $item['class'] ) ? $item['class'] : $key;
1598
1599                         $legend .= Html::element( 'dt',
1600                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1601                         ) . "\n" .
1602                         Html::rawElement( 'dd',
1603                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1604                                 $context->msg( $label )->parse()
1605                         ) . "\n";
1606                 }
1607                 # (+-123)
1608                 $legend .= Html::rawElement( 'dt',
1609                         [ 'class' => 'mw-plusminus-pos' ],
1610                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1611                 ) . "\n";
1612                 $legend .= Html::element(
1613                         'dd',
1614                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1615                         $context->msg( 'recentchanges-label-plusminus' )->text()
1616                 ) . "\n";
1617                 $legend .= Html::closeElement( 'dl' ) . "\n";
1618
1619                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1620                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1621                         $context->msg( 'recentchanges-legend-heading' )->parse();
1622
1623                 # Collapsible
1624                 $collapsedState = $this->getRequest()->getCookie( 'changeslist-state' );
1625                 $collapsedClass = $collapsedState === 'collapsed' ? ' mw-collapsed' : '';
1626                 # Enhanced mode
1627                 $enhancedMode = $this->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
1628                 $enhancedClass = $enhancedMode ? ' mw-enhanced' : '';
1629
1630                 $legendClasses = $collapsedClass . $enhancedClass;
1631                 $legend =
1632                         '<div class="mw-changeslist-legend mw-collapsible' . $legendClasses . '">' .
1633                                 $legendHeading .
1634                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1635                         '</div>';
1636
1637                 return $legend;
1638         }
1639
1640         /**
1641          * Add page-specific modules.
1642          */
1643         protected function addModules() {
1644                 $out = $this->getOutput();
1645                 // Styles and behavior for the legend box (see makeLegend())
1646                 $out->addModuleStyles( [
1647                         'mediawiki.special.changeslist.legend',
1648                         'mediawiki.special.changeslist',
1649                 ] );
1650                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1651
1652                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
1653                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1654                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1655                 }
1656         }
1657
1658         protected function getGroupName() {
1659                 return 'changes';
1660         }
1661
1662         /**
1663          * Filter on users' experience levels; this will not be called if nothing is
1664          * selected.
1665          *
1666          * @param string $specialPageClassName Class name of current special page
1667          * @param IContextSource $context Context, for e.g. user
1668          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1669          * @param array &$tables Array of tables; see IDatabase::select $table
1670          * @param array &$fields Array of fields; see IDatabase::select $vars
1671          * @param array &$conds Array of conditions; see IDatabase::select $conds
1672          * @param array &$query_options Array of query options; see IDatabase::select $options
1673          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1674          * @param array $selectedExpLevels The allowed active values, sorted
1675          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1676          *   (optional)
1677          */
1678         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1679                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1680         ) {
1681                 global $wgLearnerEdits,
1682                         $wgExperiencedUserEdits,
1683                         $wgLearnerMemberSince,
1684                         $wgExperiencedUserMemberSince;
1685
1686                 $LEVEL_COUNT = 5;
1687
1688                 // If all levels are selected, don't filter
1689                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1690                         return;
1691                 }
1692
1693                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1694                 if (
1695                         in_array( 'registered', $selectedExpLevels ) &&
1696                         in_array( 'unregistered', $selectedExpLevels )
1697                 ) {
1698                         return;
1699                 }
1700
1701                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1702                 if (
1703                         in_array( 'registered', $selectedExpLevels ) &&
1704                         !in_array( 'unregistered', $selectedExpLevels )
1705                 ) {
1706                         $conds[] = 'rc_user != 0';
1707                         return;
1708                 }
1709
1710                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1711                         $conds[] = 'rc_user = 0';
1712                         return;
1713                 }
1714
1715                 $tables[] = 'user';
1716                 $join_conds['user'] = [ 'LEFT JOIN', 'rc_user = user_id' ];
1717
1718                 if ( $now === 0 ) {
1719                         $now = time();
1720                 }
1721                 $secondsPerDay = 86400;
1722                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1723                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1724
1725                 $aboveNewcomer = $dbr->makeList(
1726                         [
1727                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1728                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1729                         ],
1730                         IDatabase::LIST_AND
1731                 );
1732
1733                 $aboveLearner = $dbr->makeList(
1734                         [
1735                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1736                                 'user_registration <= ' .
1737                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1738                         ],
1739                         IDatabase::LIST_AND
1740                 );
1741
1742                 $conditions = [];
1743
1744                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1745                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1746                         $conditions[] = 'rc_user = 0';
1747                 }
1748
1749                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1750                         $conditions[] = "NOT ( $aboveNewcomer )";
1751                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1752                         $conditions[] = $dbr->makeList(
1753                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1754                                 IDatabase::LIST_AND
1755                         );
1756                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1757                         $conditions[] = $aboveLearner;
1758                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1759                         $conditions[] = "NOT ( $aboveLearner )";
1760                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1761                         $conditions[] = $dbr->makeList(
1762                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1763                                 IDatabase::LIST_OR
1764                         );
1765                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1766                         $conditions[] = $aboveNewcomer;
1767                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1768                         $conditions[] = 'rc_user != 0';
1769                 }
1770
1771                 if ( count( $conditions ) > 1 ) {
1772                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1773                 } elseif ( count( $conditions ) === 1 ) {
1774                         $conds[] = reset( $conditions );
1775                 }
1776         }
1777
1778         /**
1779          * Check whether the structured filter UI is enabled
1780          *
1781          * @return bool
1782          */
1783         public function isStructuredFilterUiEnabled() {
1784                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1785                         return true;
1786                 }
1787
1788                 return static::checkStructuredFilterUiEnabled(
1789                         $this->getConfig(),
1790                         $this->getUser()
1791                 );
1792         }
1793
1794         /**
1795          * Check whether the structured filter UI is enabled by default (regardless of
1796          * this particular user's setting)
1797          *
1798          * @return bool
1799          */
1800         public function isStructuredFilterUiEnabledByDefault() {
1801                 if ( $this->getConfig()->get( 'StructuredChangeFiltersShowPreference' ) ) {
1802                         return !$this->getUser()->getDefaultOption( 'rcenhancedfilters-disable' );
1803                 } else {
1804                         return $this->getUser()->getDefaultOption( 'rcenhancedfilters' );
1805                 }
1806         }
1807
1808         /**
1809          * Static method to check whether StructuredFilter UI is enabled for the given user
1810          *
1811          * @since 1.31
1812          * @param Config $config
1813          * @param User $user User object
1814          * @return bool
1815          */
1816         public static function checkStructuredFilterUiEnabled( Config $config, User $user ) {
1817                 if ( $config->get( 'StructuredChangeFiltersShowPreference' ) ) {
1818                         return !$user->getOption( 'rcenhancedfilters-disable' );
1819                 } else {
1820                         return $user->getOption( 'rcenhancedfilters' );
1821                 }
1822         }
1823
1824         /**
1825          * Get the default value of the number of changes to display when loading
1826          * the result set.
1827          *
1828          * @since 1.30
1829          * @return int
1830          */
1831         public function getDefaultLimit() {
1832                 return $this->getUser()->getIntOption( static::$limitPreferenceName );
1833         }
1834
1835         /**
1836          * Get the default value of the number of days to display when loading
1837          * the result set.
1838          * Supports fractional values, and should be cast to a float.
1839          *
1840          * @since 1.30
1841          * @return float
1842          */
1843         public function getDefaultDays() {
1844                 return floatval( $this->getUser()->getOption( static::$daysPreferenceName ) );
1845         }
1846 }