includes/specialpage/ChangesListSpecialPage.php

   1 <?php
   2 /**
   3  * Special page which uses a ChangesList to show query results.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23 use MediaWiki\Logger\LoggerFactory;
  24 use Wikimedia\Rdbms\DBQueryTimeoutError;
  25 use Wikimedia\Rdbms\ResultWrapper;
  26 use Wikimedia\Rdbms\FakeResultWrapper;
  27 use Wikimedia\Rdbms\IDatabase;
  28
  29 /**
  30  * Special page which uses a ChangesList to show query results.
  31  * @todo Way too many public functions, most of them should be protected
  32  *
  33  * @ingroup SpecialPage
  34  */
  35 abstract class ChangesListSpecialPage extends SpecialPage {
  36         /**
  37          * Maximum length of a tag description in UTF-8 characters.
  38          * Longer descriptions will be truncated.
  39          */
  40         const TAG_DESC_CHARACTER_LIMIT = 120;
  41
  42         /**
  43          * Preference name for saved queries. Subclasses that use saved queries should override this.
  44          * @var string
  45          */
  46         protected static $savedQueriesPreferenceName;
  47
  48         /**
  49          * Preference name for 'days'. Subclasses should override this.
  50          * @var string
  51          */
  52         protected static $daysPreferenceName;
  53
  54         /**
  55          * Preference name for 'limit'. Subclasses should override this.
  56          * @var string
  57          */
  58         protected static $limitPreferenceName;
  59
  60         /** @var string */
  61         protected $rcSubpage;
  62
  63         /** @var FormOptions */
  64         protected $rcOptions;
  65
  66         /** @var array */
  67         protected $customFilters;
  68
  69         // Order of both groups and filters is significant; first is top-most priority,
  70         // descending from there.
  71         // 'showHideSuffix' is a shortcut to and avoid spelling out
  72         // details specific to subclasses here.
  73         /**
  74          * Definition information for the filters and their groups
  75          *
  76          * The value is $groupDefinition, a parameter to the ChangesListFilterGroup constructor.
  77          * However, priority is dynamically added for the core groups, to ease maintenance.
  78          *
  79          * Groups are displayed to the user in the structured UI.  However, if necessary,
  80          * all of the filters in a group can be configured to only display on the
  81          * unstuctured UI, in which case you don't need a group title.  This is done in
  82          * getFilterGroupDefinitionFromLegacyCustomFilters, for example.
  83          *
  84          * @var array $filterGroupDefinitions
  85          */
  86         private $filterGroupDefinitions;
  87
  88         // Same format as filterGroupDefinitions, but for a single group (reviewStatus)
  89         // that is registered conditionally.
  90         private $reviewStatusFilterGroupDefinition;
  91
  92         // Single filter registered conditionally
  93         private $hideCategorizationFilterDefinition;
  94
  95         /**
  96          * Filter groups, and their contained filters
  97          * This is an associative array (with group name as key) of ChangesListFilterGroup objects.
  98          *
  99          * @var array $filterGroups
 100          */
 101         protected $filterGroups = [];
 102
 103         public function __construct( $name, $restriction ) {
 104                 parent::__construct( $name, $restriction );
 105
 106                 $nonRevisionTypes = [ RC_LOG ];
 107                 Hooks::run( 'SpecialWatchlistGetNonRevisionTypes', [ &$nonRevisionTypes ] );
 108
 109                 $this->filterGroupDefinitions = [
 110                         [
 111                                 'name' => 'registration',
 112                                 'title' => 'rcfilters-filtergroup-registration',
 113                                 'class' => ChangesListBooleanFilterGroup::class,
 114                                 'filters' => [
 115                                         [
 116                                                 'name' => 'hideliu',
 117                                                 // rcshowhideliu-show, rcshowhideliu-hide,
 118                                                 // wlshowhideliu
 119                                                 'showHideSuffix' => 'showhideliu',
 120                                                 'default' => false,
 121                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 122                                                         &$query_options, &$join_conds
 123                                                 ) {
 124                                                         $conds[] = 'rc_user = 0';
 125                                                 },
 126                                                 'isReplacedInStructuredUi' => true,
 127
 128                                         ],
 129                                         [
 130                                                 'name' => 'hideanons',
 131                                                 // rcshowhideanons-show, rcshowhideanons-hide,
 132                                                 // wlshowhideanons
 133                                                 'showHideSuffix' => 'showhideanons',
 134                                                 'default' => false,
 135                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 136                                                         &$query_options, &$join_conds
 137                                                 ) {
 138                                                         $conds[] = 'rc_user != 0';
 139                                                 },
 140                                                 'isReplacedInStructuredUi' => true,
 141                                         ]
 142                                 ],
 143                         ],
 144
 145                         [
 146                                 'name' => 'userExpLevel',
 147                                 'title' => 'rcfilters-filtergroup-userExpLevel',
 148                                 'class' => ChangesListStringOptionsFilterGroup::class,
 149                                 'isFullCoverage' => true,
 150                                 'filters' => [
 151                                         [
 152                                                 'name' => 'unregistered',
 153                                                 'label' => 'rcfilters-filter-user-experience-level-unregistered-label',
 154                                                 'description' => 'rcfilters-filter-user-experience-level-unregistered-description',
 155                                                 'cssClassSuffix' => 'user-unregistered',
 156                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 157                                                         return !$rc->getAttribute( 'rc_user' );
 158                                                 }
 159                                         ],
 160                                         [
 161                                                 'name' => 'registered',
 162                                                 'label' => 'rcfilters-filter-user-experience-level-registered-label',
 163                                                 'description' => 'rcfilters-filter-user-experience-level-registered-description',
 164                                                 'cssClassSuffix' => 'user-registered',
 165                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 166                                                         return $rc->getAttribute( 'rc_user' );
 167                                                 }
 168                                         ],
 169                                         [
 170                                                 'name' => 'newcomer',
 171                                                 'label' => 'rcfilters-filter-user-experience-level-newcomer-label',
 172                                                 'description' => 'rcfilters-filter-user-experience-level-newcomer-description',
 173                                                 'cssClassSuffix' => 'user-newcomer',
 174                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 175                                                         $performer = $rc->getPerformer();
 176                                                         return $performer && $performer->isLoggedIn() &&
 177                                                                 $performer->getExperienceLevel() === 'newcomer';
 178                                                 }
 179                                         ],
 180                                         [
 181                                                 'name' => 'learner',
 182                                                 'label' => 'rcfilters-filter-user-experience-level-learner-label',
 183                                                 'description' => 'rcfilters-filter-user-experience-level-learner-description',
 184                                                 'cssClassSuffix' => 'user-learner',
 185                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 186                                                         $performer = $rc->getPerformer();
 187                                                         return $performer && $performer->isLoggedIn() &&
 188                                                                 $performer->getExperienceLevel() === 'learner';
 189                                                 },
 190                                         ],
 191                                         [
 192                                                 'name' => 'experienced',
 193                                                 'label' => 'rcfilters-filter-user-experience-level-experienced-label',
 194                                                 'description' => 'rcfilters-filter-user-experience-level-experienced-description',
 195                                                 'cssClassSuffix' => 'user-experienced',
 196                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 197                                                         $performer = $rc->getPerformer();
 198                                                         return $performer && $performer->isLoggedIn() &&
 199                                                                 $performer->getExperienceLevel() === 'experienced';
 200                                                 },
 201                                         ]
 202                                 ],
 203                                 'default' => ChangesListStringOptionsFilterGroup::NONE,
 204                                 'queryCallable' => [ $this, 'filterOnUserExperienceLevel' ],
 205                         ],
 206
 207                         [
 208                                 'name' => 'authorship',
 209                                 'title' => 'rcfilters-filtergroup-authorship',
 210                                 'class' => ChangesListBooleanFilterGroup::class,
 211                                 'filters' => [
 212                                         [
 213                                                 'name' => 'hidemyself',
 214                                                 'label' => 'rcfilters-filter-editsbyself-label',
 215                                                 'description' => 'rcfilters-filter-editsbyself-description',
 216                                                 // rcshowhidemine-show, rcshowhidemine-hide,
 217                                                 // wlshowhidemine
 218                                                 'showHideSuffix' => 'showhidemine',
 219                                                 'default' => false,
 220                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 221                                                         &$query_options, &$join_conds
 222                                                 ) {
 223                                                         $user = $ctx->getUser();
 224                                                         $conds[] = 'rc_user_text != ' . $dbr->addQuotes( $user->getName() );
 225                                                 },
 226                                                 'cssClassSuffix' => 'self',
 227                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 228                                                         return $ctx->getUser()->equals( $rc->getPerformer() );
 229                                                 },
 230                                         ],
 231                                         [
 232                                                 'name' => 'hidebyothers',
 233                                                 'label' => 'rcfilters-filter-editsbyother-label',
 234                                                 'description' => 'rcfilters-filter-editsbyother-description',
 235                                                 'default' => false,
 236                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 237                                                         &$query_options, &$join_conds
 238                                                 ) {
 239                                                         $user = $ctx->getUser();
 240                                                         $conds[] = 'rc_user_text = ' . $dbr->addQuotes( $user->getName() );
 241                                                 },
 242                                                 'cssClassSuffix' => 'others',
 243                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 244                                                         return !$ctx->getUser()->equals( $rc->getPerformer() );
 245                                                 },
 246                                         ]
 247                                 ]
 248                         ],
 249
 250                         [
 251                                 'name' => 'automated',
 252                                 'title' => 'rcfilters-filtergroup-automated',
 253                                 'class' => ChangesListBooleanFilterGroup::class,
 254                                 'filters' => [
 255                                         [
 256                                                 'name' => 'hidebots',
 257                                                 'label' => 'rcfilters-filter-bots-label',
 258                                                 'description' => 'rcfilters-filter-bots-description',
 259                                                 // rcshowhidebots-show, rcshowhidebots-hide,
 260                                                 // wlshowhidebots
 261                                                 'showHideSuffix' => 'showhidebots',
 262                                                 'default' => false,
 263                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 264                                                         &$query_options, &$join_conds
 265                                                 ) {
 266                                                         $conds[] = 'rc_bot = 0';
 267                                                 },
 268                                                 'cssClassSuffix' => 'bot',
 269                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 270                                                         return $rc->getAttribute( 'rc_bot' );
 271                                                 },
 272                                         ],
 273                                         [
 274                                                 'name' => 'hidehumans',
 275                                                 'label' => 'rcfilters-filter-humans-label',
 276                                                 'description' => 'rcfilters-filter-humans-description',
 277                                                 'default' => false,
 278                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 279                                                         &$query_options, &$join_conds
 280                                                 ) {
 281                                                         $conds[] = 'rc_bot = 1';
 282                                                 },
 283                                                 'cssClassSuffix' => 'human',
 284                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 285                                                         return !$rc->getAttribute( 'rc_bot' );
 286                                                 },
 287                                         ]
 288                                 ]
 289                         ],
 290
 291                         // reviewStatus (conditional)
 292
 293                         [
 294                                 'name' => 'significance',
 295                                 'title' => 'rcfilters-filtergroup-significance',
 296                                 'class' => ChangesListBooleanFilterGroup::class,
 297                                 'priority' => -6,
 298                                 'filters' => [
 299                                         [
 300                                                 'name' => 'hideminor',
 301                                                 'label' => 'rcfilters-filter-minor-label',
 302                                                 'description' => 'rcfilters-filter-minor-description',
 303                                                 // rcshowhideminor-show, rcshowhideminor-hide,
 304                                                 // wlshowhideminor
 305                                                 'showHideSuffix' => 'showhideminor',
 306                                                 'default' => false,
 307                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 308                                                         &$query_options, &$join_conds
 309                                                 ) {
 310                                                         $conds[] = 'rc_minor = 0';
 311                                                 },
 312                                                 'cssClassSuffix' => 'minor',
 313                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 314                                                         return $rc->getAttribute( 'rc_minor' );
 315                                                 }
 316                                         ],
 317                                         [
 318                                                 'name' => 'hidemajor',
 319                                                 'label' => 'rcfilters-filter-major-label',
 320                                                 'description' => 'rcfilters-filter-major-description',
 321                                                 'default' => false,
 322                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 323                                                         &$query_options, &$join_conds
 324                                                 ) {
 325                                                         $conds[] = 'rc_minor = 1';
 326                                                 },
 327                                                 'cssClassSuffix' => 'major',
 328                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 329                                                         return !$rc->getAttribute( 'rc_minor' );
 330                                                 }
 331                                         ]
 332                                 ]
 333                         ],
 334
 335                         [
 336                                 'name' => 'lastRevision',
 337                                 'title' => 'rcfilters-filtergroup-lastRevision',
 338                                 'class' => ChangesListBooleanFilterGroup::class,
 339                                 'priority' => -7,
 340                                 'filters' => [
 341                                         [
 342                                                 'name' => 'hidelastrevision',
 343                                                 'label' => 'rcfilters-filter-lastrevision-label',
 344                                                 'description' => 'rcfilters-filter-lastrevision-description',
 345                                                 'default' => false,
 346                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 347                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 348                                                         $conds[] = $dbr->makeList(
 349                                                                 [
 350                                                                         'rc_this_oldid <> page_latest',
 351                                                                         'rc_type' => $nonRevisionTypes,
 352                                                                 ],
 353                                                                 LIST_OR
 354                                                         );
 355                                                 },
 356                                                 'cssClassSuffix' => 'last',
 357                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 358                                                         return $rc->getAttribute( 'rc_this_oldid' ) === $rc->getAttribute( 'page_latest' );
 359                                                 }
 360                                         ],
 361                                         [
 362                                                 'name' => 'hidepreviousrevisions',
 363                                                 'label' => 'rcfilters-filter-previousrevision-label',
 364                                                 'description' => 'rcfilters-filter-previousrevision-description',
 365                                                 'default' => false,
 366                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 367                                                         &$query_options, &$join_conds ) use ( $nonRevisionTypes ) {
 368                                                         $conds[] = $dbr->makeList(
 369                                                                 [
 370                                                                         'rc_this_oldid = page_latest',
 371                                                                         'rc_type' => $nonRevisionTypes,
 372                                                                 ],
 373                                                                 LIST_OR
 374                                                         );
 375                                                 },
 376                                                 'cssClassSuffix' => 'previous',
 377                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 378                                                         return $rc->getAttribute( 'rc_this_oldid' ) !== $rc->getAttribute( 'page_latest' );
 379                                                 }
 380                                         ]
 381                                 ]
 382                         ],
 383
 384                         // With extensions, there can be change types that will not be hidden by any of these.
 385                         [
 386                                 'name' => 'changeType',
 387                                 'title' => 'rcfilters-filtergroup-changetype',
 388                                 'class' => ChangesListBooleanFilterGroup::class,
 389                                 'priority' => -8,
 390                                 'filters' => [
 391                                         [
 392                                                 'name' => 'hidepageedits',
 393                                                 'label' => 'rcfilters-filter-pageedits-label',
 394                                                 'description' => 'rcfilters-filter-pageedits-description',
 395                                                 'default' => false,
 396                                                 'priority' => -2,
 397                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 398                                                         &$query_options, &$join_conds
 399                                                 ) {
 400                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_EDIT );
 401                                                 },
 402                                                 'cssClassSuffix' => 'src-mw-edit',
 403                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 404                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_EDIT;
 405                                                 },
 406                                         ],
 407                                         [
 408                                                 'name' => 'hidenewpages',
 409                                                 'label' => 'rcfilters-filter-newpages-label',
 410                                                 'description' => 'rcfilters-filter-newpages-description',
 411                                                 'default' => false,
 412                                                 'priority' => -3,
 413                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 414                                                         &$query_options, &$join_conds
 415                                                 ) {
 416                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_NEW );
 417                                                 },
 418                                                 'cssClassSuffix' => 'src-mw-new',
 419                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 420                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_NEW;
 421                                                 },
 422                                         ],
 423
 424                                         // hidecategorization
 425
 426                                         [
 427                                                 'name' => 'hidelog',
 428                                                 'label' => 'rcfilters-filter-logactions-label',
 429                                                 'description' => 'rcfilters-filter-logactions-description',
 430                                                 'default' => false,
 431                                                 'priority' => -5,
 432                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 433                                                         &$query_options, &$join_conds
 434                                                 ) {
 435                                                         $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_LOG );
 436                                                 },
 437                                                 'cssClassSuffix' => 'src-mw-log',
 438                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 439                                                         return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_LOG;
 440                                                 }
 441                                         ],
 442                                 ],
 443                         ],
 444
 445                 ];
 446
 447                 $this->reviewStatusFilterGroupDefinition = [
 448                         [
 449                                 'name' => 'reviewStatus',
 450                                 'title' => 'rcfilters-filtergroup-reviewstatus',
 451                                 'class' => ChangesListBooleanFilterGroup::class,
 452                                 'priority' => -5,
 453                                 'filters' => [
 454                                         [
 455                                                 'name' => 'hidepatrolled',
 456                                                 'label' => 'rcfilters-filter-patrolled-label',
 457                                                 'description' => 'rcfilters-filter-patrolled-description',
 458                                                 // rcshowhidepatr-show, rcshowhidepatr-hide
 459                                                 // wlshowhidepatr
 460                                                 'showHideSuffix' => 'showhidepatr',
 461                                                 'default' => false,
 462                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 463                                                         &$query_options, &$join_conds
 464                                                 ) {
 465                                                         $conds[] = 'rc_patrolled = 0';
 466                                                 },
 467                                                 'cssClassSuffix' => 'patrolled',
 468                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 469                                                         return $rc->getAttribute( 'rc_patrolled' );
 470                                                 },
 471                                         ],
 472                                         [
 473                                                 'name' => 'hideunpatrolled',
 474                                                 'label' => 'rcfilters-filter-unpatrolled-label',
 475                                                 'description' => 'rcfilters-filter-unpatrolled-description',
 476                                                 'default' => false,
 477                                                 'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 478                                                         &$query_options, &$join_conds
 479                                                 ) {
 480                                                         $conds[] = 'rc_patrolled = 1';
 481                                                 },
 482                                                 'cssClassSuffix' => 'unpatrolled',
 483                                                 'isRowApplicableCallable' => function ( $ctx, $rc ) {
 484                                                         return !$rc->getAttribute( 'rc_patrolled' );
 485                                                 },
 486                                         ],
 487                                 ],
 488                         ]
 489                 ];
 490
 491                 $this->hideCategorizationFilterDefinition = [
 492                         'name' => 'hidecategorization',
 493                         'label' => 'rcfilters-filter-categorization-label',
 494                         'description' => 'rcfilters-filter-categorization-description',
 495                         // rcshowhidecategorization-show, rcshowhidecategorization-hide.
 496                         // wlshowhidecategorization
 497                         'showHideSuffix' => 'showhidecategorization',
 498                         'default' => false,
 499                         'priority' => -4,
 500                         'queryCallable' => function ( $specialClassName, $ctx, $dbr, &$tables, &$fields, &$conds,
 501                                 &$query_options, &$join_conds
 502                         ) {
 503                                 $conds[] = 'rc_type != ' . $dbr->addQuotes( RC_CATEGORIZE );
 504                         },
 505                         'cssClassSuffix' => 'src-mw-categorize',
 506                         'isRowApplicableCallable' => function ( $ctx, $rc ) {
 507                                 return $rc->getAttribute( 'rc_source' ) === RecentChange::SRC_CATEGORIZE;
 508                         },
 509                 ];
 510         }
 511
 512         /**
 513          * Check if filters are in conflict and guaranteed to return no results.
 514          *
 515          * @return bool
 516          */
 517         protected function areFiltersInConflict() {
 518                 $opts = $this->getOptions();
 519                 /** @var ChangesListFilterGroup $group */
 520                 foreach ( $this->getFilterGroups() as $group ) {
 521                         if ( $group->getConflictingGroups() ) {
 522                                 wfLogWarning(
 523                                         $group->getName() .
 524                                         " specifies conflicts with other groups but these are not supported yet."
 525                                 );
 526                         }
 527
 528                         /** @var ChangesListFilter $conflictingFilter */
 529                         foreach ( $group->getConflictingFilters() as $conflictingFilter ) {
 530                                 if ( $conflictingFilter->activelyInConflictWithGroup( $group, $opts ) ) {
 531                                         return true;
 532                                 }
 533                         }
 534
 535                         /** @var ChangesListFilter $filter */
 536                         foreach ( $group->getFilters() as $filter ) {
 537                                 /** @var ChangesListFilter $conflictingFilter */
 538                                 foreach ( $filter->getConflictingFilters() as $conflictingFilter ) {
 539                                         if (
 540                                                 $conflictingFilter->activelyInConflictWithFilter( $filter, $opts ) &&
 541                                                 $filter->activelyInConflictWithFilter( $conflictingFilter, $opts )
 542                                         ) {
 543                                                 return true;
 544                                         }
 545                                 }
 546
 547                         }
 548
 549                 }
 550
 551                 return false;
 552         }
 553
 554         /**
 555          * Main execution point
 556          *
 557          * @param string $subpage
 558          */
 559         public function execute( $subpage ) {
 560                 $this->rcSubpage = $subpage;
 561
 562                 $this->considerActionsForDefaultSavedQuery( $subpage );
 563
 564                 $opts = $this->getOptions();
 565                 try {
 566                         $rows = $this->getRows();
 567                         if ( $rows === false ) {
 568                                 $rows = new FakeResultWrapper( [] );
 569                         }
 570
 571                         // Used by Structured UI app to get results without MW chrome
 572                         if ( $this->getRequest()->getVal( 'action' ) === 'render' ) {
 573                                 $this->getOutput()->setArticleBodyOnly( true );
 574                         }
 575
 576                         // Used by "live update" and "view newest" to check
 577                         // if there's new changes with minimal data transfer
 578                         if ( $this->getRequest()->getBool( 'peek' ) ) {
 579                                 $code = $rows->numRows() > 0 ? 200 : 204;
 580                                 $this->getOutput()->setStatusCode( $code );
 581
 582                                 if ( $this->getUser()->isAnon() !==
 583                                         $this->getRequest()->getFuzzyBool( 'isAnon' )
 584                                 ) {
 585                                         $this->getOutput()->setStatusCode( 205 );
 586                                 }
 587
 588                                 return;
 589                         }
 590
 591                         $batch = new LinkBatch;
 592                         foreach ( $rows as $row ) {
 593                                 $batch->add( NS_USER, $row->rc_user_text );
 594                                 $batch->add( NS_USER_TALK, $row->rc_user_text );
 595                                 $batch->add( $row->rc_namespace, $row->rc_title );
 596                                 if ( $row->rc_source === RecentChange::SRC_LOG ) {
 597                                         $formatter = LogFormatter::newFromRow( $row );
 598                                         foreach ( $formatter->getPreloadTitles() as $title ) {
 599                                                 $batch->addObj( $title );
 600                                         }
 601                                 }
 602                         }
 603                         $batch->execute();
 604
 605                         $this->setHeaders();
 606                         $this->outputHeader();
 607                         $this->addModules();
 608                         $this->webOutput( $rows, $opts );
 609
 610                         $rows->free();
 611                 } catch ( DBQueryTimeoutError $timeoutException ) {
 612                         MWExceptionHandler::logException( $timeoutException );
 613
 614                         $this->setHeaders();
 615                         $this->outputHeader();
 616                         $this->addModules();
 617
 618                         $this->getOutput()->setStatusCode( 500 );
 619                         $this->webOutputHeader( 0, $opts );
 620                         $this->outputTimeout();
 621                 }
 622
 623                 if ( $this->getConfig()->get( 'EnableWANCacheReaper' ) ) {
 624                         // Clean up any bad page entries for titles showing up in RC
 625                         DeferredUpdates::addUpdate( new WANCacheReapUpdate(
 626                                 $this->getDB(),
 627                                 LoggerFactory::getInstance( 'objectcache' )
 628                         ) );
 629                 }
 630
 631                 $this->includeRcFiltersApp();
 632         }
 633
 634         /**
 635          * Check whether or not the page should load defaults, and if so, whether
 636          * a default saved query is relevant to be redirected to. If it is relevant,
 637          * redirect properly with all necessary query parameters.
 638          *
 639          * @param string $subpage
 640          */
 641         protected function considerActionsForDefaultSavedQuery( $subpage ) {
 642                 if ( !$this->isStructuredFilterUiEnabled() || $this->including() ) {
 643                         return;
 644                 }
 645
 646                 $knownParams = call_user_func_array(
 647                         [ $this->getRequest(), 'getValues' ],
 648                         array_keys( $this->getOptions()->getAllValues() )
 649                 );
 650
 651                 // HACK: Temporarily until we can properly define "sticky" filters and parameters,
 652                 // we need to exclude several parameters we know should not be counted towards preventing
 653                 // the loading of defaults.
 654                 $excludedParams = [ 'limit' => '', 'days' => '', 'enhanced' => '', 'from' => '' ];
 655                 $knownParams = array_diff_key( $knownParams, $excludedParams );
 656
 657                 if (
 658                         // If there are NO known parameters in the URL request
 659                         // (that are not excluded) then we need to check into loading
 660                         // the default saved query
 661                         count( $knownParams ) === 0
 662                 ) {
 663                         // Get the saved queries data and parse it
 664                         $savedQueries = FormatJson::decode(
 665                                 $this->getUser()->getOption( static::$savedQueriesPreferenceName ),
 666                                 true
 667                         );
 668
 669                         if ( $savedQueries && isset( $savedQueries[ 'default' ] ) ) {
 670                                 // Only load queries that are 'version' 2, since those
 671                                 // have parameter representation
 672                                 if ( isset( $savedQueries[ 'version' ] ) && $savedQueries[ 'version' ] === '2' ) {
 673                                         $savedQueryDefaultID = $savedQueries[ 'default' ];
 674                                         $defaultQuery = $savedQueries[ 'queries' ][ $savedQueryDefaultID ][ 'data' ];
 675
 676                                         // Build the entire parameter list
 677                                         $query = array_merge(
 678                                                 $defaultQuery[ 'params' ],
 679                                                 $defaultQuery[ 'highlights' ],
 680                                                 [
 681                                                         'urlversion' => '2',
 682                                                 ]
 683                                         );
 684                                         // Add to the query any parameters that we may have ignored before
 685                                         // but are still valid and requested in the URL
 686                                         $query = array_merge( $this->getRequest()->getValues(), $query );
 687                                         unset( $query[ 'title' ] );
 688                                         $this->getOutput()->redirect( $this->getPageTitle( $subpage )->getCanonicalURL( $query ) );
 689                                 } else {
 690                                         // There's a default, but the version is not 2, and the server can't
 691                                         // actually recognize the query itself. This happens if it is before
 692                                         // the conversion, so we need to tell the UI to reload saved query as
 693                                         // it does the conversion to version 2
 694                                         $this->getOutput()->addJsConfigVars(
 695                                                 'wgStructuredChangeFiltersDefaultSavedQueryExists',
 696                                                 true
 697                                         );
 698
 699                                         // Add the class that tells the frontend it is still loading
 700                                         // another query
 701                                         $this->getOutput()->addBodyClasses( 'mw-rcfilters-ui-loading' );
 702                                 }
 703                         }
 704                 }
 705         }
 706
 707         /**
 708          * Include the modules and configuration for the RCFilters app.
 709          * Conditional on the user having the feature enabled.
 710          *
 711          * If it is disabled, add a <body> class marking that
 712          */
 713         protected function includeRcFiltersApp() {
 714                 $out = $this->getOutput();
 715                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
 716                         $jsData = $this->getStructuredFilterJsData();
 717
 718                         $messages = [];
 719                         foreach ( $jsData['messageKeys'] as $key ) {
 720                                 $messages[$key] = $this->msg( $key )->plain();
 721                         }
 722
 723                         $out->addBodyClasses( 'mw-rcfilters-enabled' );
 724
 725                         $out->addHTML(
 726                                 ResourceLoader::makeInlineScript(
 727                                         ResourceLoader::makeMessageSetScript( $messages )
 728                                 )
 729                         );
 730
 731                         $out->addJsConfigVars( 'wgStructuredChangeFilters', $jsData['groups'] );
 732
 733                         $out->addJsConfigVars(
 734                                 'wgRCFiltersChangeTags',
 735                                 $this->getChangeTagList()
 736                         );
 737                         $out->addJsConfigVars(
 738                                 'StructuredChangeFiltersDisplayConfig',
 739                                 [
 740                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 741                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 742                                         'limitDefault' => $this->getDefaultLimit(),
 743                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 744                                         'daysDefault' => $this->getDefaultDays(),
 745                                 ]
 746                         );
 747
 748                         $out->addJsConfigVars(
 749                                 'wgStructuredChangeFiltersSavedQueriesPreferenceName',
 750                                 static::$savedQueriesPreferenceName
 751                         );
 752                         $out->addJsConfigVars(
 753                                 'wgStructuredChangeFiltersLimitPreferenceName',
 754                                 static::$limitPreferenceName
 755                         );
 756                         $out->addJsConfigVars(
 757                                 'wgStructuredChangeFiltersDaysPreferenceName',
 758                                 static::$daysPreferenceName
 759                         );
 760
 761                         $out->addJsConfigVars(
 762                                 'StructuredChangeFiltersLiveUpdatePollingRate',
 763                                 $this->getConfig()->get( 'StructuredChangeFiltersLiveUpdatePollingRate' )
 764                         );
 765                 } else {
 766                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 767                 }
 768         }
 769
 770         /**
 771          * Fetch the change tags list for the front end
 772          *
 773          * @return Array Tag data
 774          */
 775         protected function getChangeTagList() {
 776                 $cache = ObjectCache::getMainWANInstance();
 777                 $context = $this->getContext();
 778                 return $cache->getWithSetCallback(
 779                         $cache->makeKey( 'changeslistspecialpage-changetags', $context->getLanguage()->getCode() ),
 780                         $cache::TTL_MINUTE * 10,
 781                         function () use ( $context ) {
 782                                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 783                                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 784
 785                                 // Hit counts disabled for perf reasons, see T169997
 786                                 /*
 787                                 $tagStats = ChangeTags::tagUsageStatistics();
 788                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 789
 790                                 // Sort by hits
 791                                 arsort( $tagHitCounts );
 792                                 */
 793                                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags );
 794
 795                                 // Build the list and data
 796                                 $result = [];
 797                                 foreach ( $tagHitCounts as $tagName => $hits ) {
 798                                         if (
 799                                                 // Only get active tags
 800                                                 isset( $explicitlyDefinedTags[ $tagName ] ) ||
 801                                                 isset( $softwareActivatedTags[ $tagName ] )
 802                                         ) {
 803                                                 $result[] = [
 804                                                         'name' => $tagName,
 805                                                         'label' => Sanitizer::stripAllTags(
 806                                                                 ChangeTags::tagDescription( $tagName, $context )
 807                                                         ),
 808                                                         'description' =>
 809                                                                 ChangeTags::truncateTagDescription(
 810                                                                         $tagName, self::TAG_DESC_CHARACTER_LIMIT, $context
 811                                                                 ),
 812                                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 813                                                         'hits' => $hits,
 814                                                 ];
 815                                         }
 816                                 }
 817
 818                                 // Instead of sorting by hit count (disabled, see above), sort by display name
 819                                 usort( $result, function ( $a, $b ) {
 820                                         return strcasecmp( $a['label'], $b['label'] );
 821                                 } );
 822
 823                                 return $result;
 824                         },
 825                         [
 826                                 'lockTSE' => 30
 827                         ]
 828                 );
 829         }
 830
 831         /**
 832          * Add the "no results" message to the output
 833          */
 834         protected function outputNoResults() {
 835                 $this->getOutput()->addHTML(
 836                         '<div class="mw-changeslist-empty">' .
 837                         $this->msg( 'recentchanges-noresult' )->parse() .
 838                         '</div>'
 839                 );
 840         }
 841
 842         /**
 843          * Add the "timeout" message to the output
 844          */
 845         protected function outputTimeout() {
 846                 $this->getOutput()->addHTML(
 847                         '<div class="mw-changeslist-timeout">' .
 848                         $this->msg( 'recentchanges-timeout' )->parse() .
 849                         '</div>'
 850                 );
 851         }
 852
 853         /**
 854          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 855          *
 856          * @return bool|ResultWrapper Result or false
 857          */
 858         public function getRows() {
 859                 $opts = $this->getOptions();
 860
 861                 $tables = [];
 862                 $fields = [];
 863                 $conds = [];
 864                 $query_options = [];
 865                 $join_conds = [];
 866                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 867
 868                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 869         }
 870
 871         /**
 872          * Get the current FormOptions for this request
 873          *
 874          * @return FormOptions
 875          */
 876         public function getOptions() {
 877                 if ( $this->rcOptions === null ) {
 878                         $this->rcOptions = $this->setup( $this->rcSubpage );
 879                 }
 880
 881                 return $this->rcOptions;
 882         }
 883
 884         /**
 885          * Register all filters and their groups (including those from hooks), plus handle
 886          * conflicts and defaults.
 887          *
 888          * You might want to customize these in the same method, in subclasses.  You can
 889          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 890          * filter, then make necessary modfications to the filter or group (e.g. with
 891          * setDefault).
 892          */
 893         protected function registerFilters() {
 894                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 895
 896                 // Make sure this is not being transcluded (we don't want to show this
 897                 // information to all users just because the user that saves the edit can
 898                 // patrol or is logged in)
 899                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 900                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 901                 }
 902
 903                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 904
 905                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 906                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 907                                 $this->hideCategorizationFilterDefinition
 908                         );
 909
 910                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 911
 912                         $hideCategorization = new ChangesListBooleanFilter(
 913                                 $transformedHideCategorizationDef
 914                         );
 915                 }
 916
 917                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 918
 919                 $unstructuredGroupDefinition =
 920                         $this->getFilterGroupDefinitionFromLegacyCustomFilters(
 921                                 $this->getCustomFilters()
 922                         );
 923                 $this->registerFiltersFromDefinitions( [ $unstructuredGroupDefinition ] );
 924
 925                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
 926                 $registered = $userExperienceLevel->getFilter( 'registered' );
 927                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
 928                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
 929                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
 930
 931                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
 932                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
 933                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
 934
 935                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
 936                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
 937
 938                 // categoryFilter is conditional; see registerFilters
 939                 if ( $categoryFilter !== null ) {
 940                         $hideMinorFilter->conflictsWith(
 941                                 $categoryFilter,
 942                                 'rcfilters-hideminor-conflicts-typeofchange-global',
 943                                 'rcfilters-hideminor-conflicts-typeofchange',
 944                                 'rcfilters-typeofchange-conflicts-hideminor'
 945                         );
 946                 }
 947                 $hideMinorFilter->conflictsWith(
 948                         $logactionsFilter,
 949                         'rcfilters-hideminor-conflicts-typeofchange-global',
 950                         'rcfilters-hideminor-conflicts-typeofchange',
 951                         'rcfilters-typeofchange-conflicts-hideminor'
 952                 );
 953                 $hideMinorFilter->conflictsWith(
 954                         $pagecreationFilter,
 955                         'rcfilters-hideminor-conflicts-typeofchange-global',
 956                         'rcfilters-hideminor-conflicts-typeofchange',
 957                         'rcfilters-typeofchange-conflicts-hideminor'
 958                 );
 959         }
 960
 961         /**
 962          * Transforms filter definition to prepare it for constructor.
 963          *
 964          * See overrides of this method as well.
 965          *
 966          * @param array $filterDefinition Original filter definition
 967          *
 968          * @return array Transformed definition
 969          */
 970         protected function transformFilterDefinition( array $filterDefinition ) {
 971                 return $filterDefinition;
 972         }
 973
 974         /**
 975          * Register filters from a definition object
 976          *
 977          * Array specifying groups and their filters; see Filter and
 978          * ChangesListFilterGroup constructors.
 979          *
 980          * There is light processing to simplify core maintenance.
 981          * @param array $definition
 982          */
 983         protected function registerFiltersFromDefinitions( array $definition ) {
 984                 $autoFillPriority = -1;
 985                 foreach ( $definition as $groupDefinition ) {
 986                         if ( !isset( $groupDefinition['priority'] ) ) {
 987                                 $groupDefinition['priority'] = $autoFillPriority;
 988                         } else {
 989                                 // If it's explicitly specified, start over the auto-fill
 990                                 $autoFillPriority = $groupDefinition['priority'];
 991                         }
 992
 993                         $autoFillPriority--;
 994
 995                         $className = $groupDefinition['class'];
 996                         unset( $groupDefinition['class'] );
 997
 998                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
 999                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
1000                         }
1001
1002                         $this->registerFilterGroup( new $className( $groupDefinition ) );
1003                 }
1004         }
1005
1006         /**
1007          * Get filter group definition from legacy custom filters
1008          *
1009          * @param array $customFilters Custom filters from legacy hooks
1010          * @return array Group definition
1011          */
1012         protected function getFilterGroupDefinitionFromLegacyCustomFilters( array $customFilters ) {
1013                 // Special internal unstructured group
1014                 $unstructuredGroupDefinition = [
1015                         'name' => 'unstructured',
1016                         'class' => ChangesListBooleanFilterGroup::class,
1017                         'priority' => -1, // Won't display in structured
1018                         'filters' => [],
1019                 ];
1020
1021                 foreach ( $customFilters as $name => $params ) {
1022                         $unstructuredGroupDefinition['filters'][] = [
1023                                 'name' => $name,
1024                                 'showHide' => $params['msg'],
1025                                 'default' => $params['default'],
1026                         ];
1027                 }
1028
1029                 return $unstructuredGroupDefinition;
1030         }
1031
1032         /**
1033          * @return array The legacy show/hide toggle filters
1034          */
1035         protected function getLegacyShowHideFilters() {
1036                 $filters = [];
1037                 foreach ( $this->filterGroups as $group ) {
1038                         if ( $group instanceof  ChangesListBooleanFilterGroup ) {
1039                                 foreach ( $group->getFilters() as $key => $filter ) {
1040                                         if ( $filter->displaysOnUnstructuredUi( $this ) ) {
1041                                                 $filters[ $key ] = $filter;
1042                                         }
1043                                 }
1044                         }
1045                 }
1046                 return $filters;
1047         }
1048
1049         /**
1050          * Register all the filters, including legacy hook-driven ones.
1051          * Then create a FormOptions object with options as specified by the user
1052          *
1053          * @param array $parameters
1054          *
1055          * @return FormOptions
1056          */
1057         public function setup( $parameters ) {
1058                 $this->registerFilters();
1059
1060                 $opts = $this->getDefaultOptions();
1061
1062                 $opts = $this->fetchOptionsFromRequest( $opts );
1063
1064                 // Give precedence to subpage syntax
1065                 if ( $parameters !== null ) {
1066                         $this->parseParameters( $parameters, $opts );
1067                 }
1068
1069                 $this->validateOptions( $opts );
1070
1071                 return $opts;
1072         }
1073
1074         /**
1075          * Get a FormOptions object containing the default options. By default, returns
1076          * some basic options.  The filters listed explicitly here are overriden in this
1077          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
1078          * and more) are structured.  Structured filters are overriden in registerFilters.
1079          * not here.
1080          *
1081          * @return FormOptions
1082          */
1083         public function getDefaultOptions() {
1084                 $opts = new FormOptions();
1085                 $structuredUI = $this->isStructuredFilterUiEnabled();
1086                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
1087                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
1088
1089                 /** @var ChangesListFilterGroup $filterGroup */
1090                 foreach ( $this->filterGroups as $filterGroup ) {
1091                         $filterGroup->addOptions( $opts, $useDefaults, $structuredUI );
1092                 }
1093
1094                 $opts->add( 'namespace', '', FormOptions::STRING );
1095                 $opts->add( 'invert', false );
1096                 $opts->add( 'associated', false );
1097                 $opts->add( 'urlversion', 1 );
1098                 $opts->add( 'tagfilter', '' );
1099
1100                 $opts->add( 'days', $this->getDefaultDays(), FormOptions::FLOAT );
1101                 $opts->add( 'limit', $this->getDefaultLimit(), FormOptions::INT );
1102
1103                 $opts->add( 'from', '' );
1104
1105                 return $opts;
1106         }
1107
1108         /**
1109          * Register a structured changes list filter group
1110          *
1111          * @param ChangesListFilterGroup $group
1112          */
1113         public function registerFilterGroup( ChangesListFilterGroup $group ) {
1114                 $groupName = $group->getName();
1115
1116                 $this->filterGroups[$groupName] = $group;
1117         }
1118
1119         /**
1120          * Gets the currently registered filters groups
1121          *
1122          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
1123          */
1124         protected function getFilterGroups() {
1125                 return $this->filterGroups;
1126         }
1127
1128         /**
1129          * Gets a specified ChangesListFilterGroup by name
1130          *
1131          * @param string $groupName Name of group
1132          *
1133          * @return ChangesListFilterGroup|null Group, or null if not registered
1134          */
1135         public function getFilterGroup( $groupName ) {
1136                 return isset( $this->filterGroups[$groupName] ) ?
1137                         $this->filterGroups[$groupName] :
1138                         null;
1139         }
1140
1141         // Currently, this intentionally only includes filters that display
1142         // in the structured UI.  This can be changed easily, though, if we want
1143         // to include data on filters that use the unstructured UI.  messageKeys is a
1144         // special top-level value, with the value being an array of the message keys to
1145         // send to the client.
1146         /**
1147          * Gets structured filter information needed by JS
1148          *
1149          * @return array Associative array
1150          * * array $return['groups'] Group data
1151          * * array $return['messageKeys'] Array of message keys
1152          */
1153         public function getStructuredFilterJsData() {
1154                 $output = [
1155                         'groups' => [],
1156                         'messageKeys' => [],
1157                 ];
1158
1159                 usort( $this->filterGroups, function ( $a, $b ) {
1160                         return $b->getPriority() - $a->getPriority();
1161                 } );
1162
1163                 foreach ( $this->filterGroups as $groupName => $group ) {
1164                         $groupOutput = $group->getJsData( $this );
1165                         if ( $groupOutput !== null ) {
1166                                 $output['messageKeys'] = array_merge(
1167                                         $output['messageKeys'],
1168                                         $groupOutput['messageKeys']
1169                                 );
1170
1171                                 unset( $groupOutput['messageKeys'] );
1172                                 $output['groups'][] = $groupOutput;
1173                         }
1174                 }
1175
1176                 return $output;
1177         }
1178
1179         /**
1180          * Get custom show/hide filters using deprecated ChangesListSpecialPageFilters
1181          * hook.
1182          *
1183          * @return array Map of filter URL param names to properties (msg/default)
1184          */
1185         protected function getCustomFilters() {
1186                 if ( $this->customFilters === null ) {
1187                         $this->customFilters = [];
1188                         Hooks::run( 'ChangesListSpecialPageFilters', [ $this, &$this->customFilters ], '1.29' );
1189                 }
1190
1191                 return $this->customFilters;
1192         }
1193
1194         /**
1195          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1196          *
1197          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1198          *
1199          * @param FormOptions $opts
1200          * @return FormOptions
1201          */
1202         protected function fetchOptionsFromRequest( $opts ) {
1203                 $opts->fetchValuesFromRequest( $this->getRequest() );
1204
1205                 return $opts;
1206         }
1207
1208         /**
1209          * Process $par and put options found in $opts. Used when including the page.
1210          *
1211          * @param string $par
1212          * @param FormOptions $opts
1213          */
1214         public function parseParameters( $par, FormOptions $opts ) {
1215                 $stringParameterNameSet = [];
1216                 $hideParameterNameSet = [];
1217
1218                 // URL parameters can be per-group, like 'userExpLevel',
1219                 // or per-filter, like 'hideminor'.
1220
1221                 foreach ( $this->filterGroups as $filterGroup ) {
1222                         if ( $filterGroup instanceof ChangesListStringOptionsFilterGroup ) {
1223                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1224                         } elseif ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1225                                 foreach ( $filterGroup->getFilters() as $filter ) {
1226                                         $hideParameterNameSet[$filter->getName()] = true;
1227                                 }
1228                         }
1229                 }
1230
1231                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1232                 foreach ( $bits as $bit ) {
1233                         $m = [];
1234                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1235                                 // hidefoo => hidefoo=true
1236                                 $opts[$bit] = true;
1237                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1238                                 // foo => hidefoo=false
1239                                 $opts["hide$bit"] = false;
1240                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1241                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1242                                         $opts[$m[1]] = $m[2];
1243                                 }
1244                         }
1245                 }
1246         }
1247
1248         /**
1249          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1250          *
1251          * @param FormOptions $opts
1252          */
1253         public function validateOptions( FormOptions $opts ) {
1254                 $isContradictory = $this->fixContradictoryOptions( $opts );
1255                 $isReplaced = $this->replaceOldOptions( $opts );
1256
1257                 if ( $isContradictory || $isReplaced ) {
1258                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1259                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1260                 }
1261
1262                 $opts->validateIntBounds( 'limit', 0, 5000 );
1263                 $opts->validateBounds( 'days', 0, $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
1264         }
1265
1266         /**
1267          * Fix invalid options by resetting pairs that should never appear together.
1268          *
1269          * @param FormOptions $opts
1270          * @return bool True if any option was reset
1271          */
1272         private function fixContradictoryOptions( FormOptions $opts ) {
1273                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1274
1275                 foreach ( $this->filterGroups as $filterGroup ) {
1276                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1277                                 $filters = $filterGroup->getFilters();
1278
1279                                 if ( count( $filters ) === 1 ) {
1280                                         // legacy boolean filters should not be considered
1281                                         continue;
1282                                 }
1283
1284                                 $allInGroupEnabled = array_reduce(
1285                                         $filters,
1286                                         function ( $carry, $filter ) use ( $opts ) {
1287                                                 return $carry && $opts[ $filter->getName() ];
1288                                         },
1289                                         /* initialValue */ count( $filters ) > 0
1290                                 );
1291
1292                                 if ( $allInGroupEnabled ) {
1293                                         foreach ( $filters as $filter ) {
1294                                                 $opts[ $filter->getName() ] = false;
1295                                         }
1296
1297                                         $fixed = true;
1298                                 }
1299                         }
1300                 }
1301
1302                 return $fixed;
1303         }
1304
1305         /**
1306          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1307          * compatibility.
1308          *
1309          * This is deprecated and may be removed.
1310          *
1311          * @param FormOptions $opts
1312          * @return bool True if this change was mode
1313          */
1314         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1315                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1316                         $opts->reset( 'hideanons' );
1317                         if ( !$opts['hidebots'] ) {
1318                                 $opts->reset( 'hideliu' );
1319                                 $opts['hidehumans'] = 1;
1320                         }
1321
1322                         return true;
1323                 }
1324
1325                 return false;
1326         }
1327
1328         /**
1329          * Replace old options 'hideanons' or 'hideliu' with structured UI equivalent
1330          *
1331          * @param FormOptions $opts
1332          * @return bool True if the change was made
1333          */
1334         public function replaceOldOptions( FormOptions $opts ) {
1335                 if ( !$this->isStructuredFilterUiEnabled() ) {
1336                         return false;
1337                 }
1338
1339                 // At this point 'hideanons' and 'hideliu' cannot be both true,
1340                 // because fixBackwardsCompatibilityOptions resets (at least) 'hideanons' in such case
1341                 if ( $opts[ 'hideanons' ] ) {
1342                         $opts->reset( 'hideanons' );
1343                         $opts[ 'userExpLevel' ] = 'registered';
1344                         return true;
1345                 }
1346
1347                 if ( $opts[ 'hideliu' ] ) {
1348                         $opts->reset( 'hideliu' );
1349                         $opts[ 'userExpLevel' ] = 'unregistered';
1350                         return true;
1351                 }
1352
1353                 return false;
1354         }
1355
1356         /**
1357          * Convert parameters values from true/false to 1/0
1358          * so they are not omitted by wfArrayToCgi()
1359          * Bug 36524
1360          *
1361          * @param array $params
1362          * @return array
1363          */
1364         protected function convertParamsForLink( $params ) {
1365                 foreach ( $params as &$value ) {
1366                         if ( $value === false ) {
1367                                 $value = '0';
1368                         }
1369                 }
1370                 unset( $value );
1371                 return $params;
1372         }
1373
1374         /**
1375          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1376          * the user requested.
1377          *
1378          * @param array &$tables Array of tables; see IDatabase::select $table
1379          * @param array &$fields Array of fields; see IDatabase::select $vars
1380          * @param array &$conds Array of conditions; see IDatabase::select $conds
1381          * @param array &$query_options Array of query options; see IDatabase::select $options
1382          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1383          * @param FormOptions $opts
1384          */
1385         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1386                 &$join_conds, FormOptions $opts
1387         ) {
1388                 $dbr = $this->getDB();
1389                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1390
1391                 /** @var ChangesListFilterGroup $filterGroup */
1392                 foreach ( $this->filterGroups as $filterGroup ) {
1393                         $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1394                                 $query_options, $join_conds, $opts, $isStructuredUI );
1395                 }
1396
1397                 // Namespace filtering
1398                 if ( $opts[ 'namespace' ] !== '' ) {
1399                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1400
1401                         if ( $opts[ 'associated' ] ) {
1402                                 $associatedNamespaces = array_map(
1403                                         function ( $ns ) {
1404                                                 return MWNamespace::getAssociated( $ns );
1405                                         },
1406                                         $namespaces
1407                                 );
1408                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1409                         }
1410
1411                         if ( count( $namespaces ) === 1 ) {
1412                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1413                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1414                         } else {
1415                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1416                                 sort( $namespaces );
1417                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1418                         }
1419                         $conds[] = "rc_namespace $operator $value";
1420                 }
1421
1422                 // Calculate cutoff
1423                 $cutoff_unixtime = time() - $opts['days'] * 3600 * 24;
1424                 $cutoff = $dbr->timestamp( $cutoff_unixtime );
1425
1426                 $fromValid = preg_match( '/^[0-9]{14}$/', $opts['from'] );
1427                 if ( $fromValid && $opts['from'] > wfTimestamp( TS_MW, $cutoff ) ) {
1428                         $cutoff = $dbr->timestamp( $opts['from'] );
1429                 } else {
1430                         $opts->reset( 'from' );
1431                 }
1432
1433                 $conds[] = 'rc_timestamp >= ' . $dbr->addQuotes( $cutoff );
1434         }
1435
1436         /**
1437          * Process the query
1438          *
1439          * @param array $tables Array of tables; see IDatabase::select $table
1440          * @param array $fields Array of fields; see IDatabase::select $vars
1441          * @param array $conds Array of conditions; see IDatabase::select $conds
1442          * @param array $query_options Array of query options; see IDatabase::select $options
1443          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1444          * @param FormOptions $opts
1445          * @return bool|ResultWrapper Result or false
1446          */
1447         protected function doMainQuery( $tables, $fields, $conds,
1448                 $query_options, $join_conds, FormOptions $opts
1449         ) {
1450                 $rcQuery = RecentChange::getQueryInfo();
1451                 $tables = array_merge( $tables, $rcQuery['tables'] );
1452                 $fields = array_merge( $rcQuery['fields'], $fields );
1453                 $join_conds = array_merge( $join_conds, $rcQuery['joins'] );
1454
1455                 ChangeTags::modifyDisplayQuery(
1456                         $tables,
1457                         $fields,
1458                         $conds,
1459                         $join_conds,
1460                         $query_options,
1461                         ''
1462                 );
1463
1464                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1465                         $opts )
1466                 ) {
1467                         return false;
1468                 }
1469
1470                 $dbr = $this->getDB();
1471
1472                 return $dbr->select(
1473                         $tables,
1474                         $fields,
1475                         $conds,
1476                         __METHOD__,
1477                         $query_options,
1478                         $join_conds
1479                 );
1480         }
1481
1482         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1483                 &$query_options, &$join_conds, $opts
1484         ) {
1485                 return Hooks::run(
1486                         'ChangesListSpecialPageQuery',
1487                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1488                 );
1489         }
1490
1491         /**
1492          * Return a IDatabase object for reading
1493          *
1494          * @return IDatabase
1495          */
1496         protected function getDB() {
1497                 return wfGetDB( DB_REPLICA );
1498         }
1499
1500         /**
1501          * Send header output to the OutputPage object, only called if not using feeds
1502          *
1503          * @param int $rowCount Number of database rows
1504          * @param FormOptions $opts
1505          */
1506         private function webOutputHeader( $rowCount, $opts ) {
1507                 if ( !$this->including() ) {
1508                         $this->outputFeedLinks();
1509                         $this->doHeader( $opts, $rowCount );
1510                 }
1511         }
1512
1513         /**
1514          * Send output to the OutputPage object, only called if not used feeds
1515          *
1516          * @param ResultWrapper $rows Database rows
1517          * @param FormOptions $opts
1518          */
1519         public function webOutput( $rows, $opts ) {
1520                 $this->webOutputHeader( $rows->numRows(), $opts );
1521
1522                 $this->outputChangesList( $rows, $opts );
1523         }
1524
1525         /**
1526          * Output feed links.
1527          */
1528         public function outputFeedLinks() {
1529                 // nothing by default
1530         }
1531
1532         /**
1533          * Build and output the actual changes list.
1534          *
1535          * @param ResultWrapper $rows Database rows
1536          * @param FormOptions $opts
1537          */
1538         abstract public function outputChangesList( $rows, $opts );
1539
1540         /**
1541          * Set the text to be displayed above the changes
1542          *
1543          * @param FormOptions $opts
1544          * @param int $numRows Number of rows in the result to show after this header
1545          */
1546         public function doHeader( $opts, $numRows ) {
1547                 $this->setTopText( $opts );
1548
1549                 // @todo Lots of stuff should be done here.
1550
1551                 $this->setBottomText( $opts );
1552         }
1553
1554         /**
1555          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
1556          * or similar methods to print the text.
1557          *
1558          * @param FormOptions $opts
1559          */
1560         public function setTopText( FormOptions $opts ) {
1561                 // nothing by default
1562         }
1563
1564         /**
1565          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
1566          * or similar methods to print the text.
1567          *
1568          * @param FormOptions $opts
1569          */
1570         public function setBottomText( FormOptions $opts ) {
1571                 // nothing by default
1572         }
1573
1574         /**
1575          * Get options to be displayed in a form
1576          * @todo This should handle options returned by getDefaultOptions().
1577          * @todo Not called by anything in this class (but is in subclasses), should be
1578          * called by something… doHeader() maybe?
1579          *
1580          * @param FormOptions $opts
1581          * @return array
1582          */
1583         public function getExtraOptions( $opts ) {
1584                 return [];
1585         }
1586
1587         /**
1588          * Return the legend displayed within the fieldset
1589          *
1590          * @return string
1591          */
1592         public function makeLegend() {
1593                 $context = $this->getContext();
1594                 $user = $context->getUser();
1595                 # The legend showing what the letters and stuff mean
1596                 $legend = Html::openElement( 'dl' ) . "\n";
1597                 # Iterates through them and gets the messages for both letter and tooltip
1598                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1599                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1600                         unset( $legendItems['unpatrolled'] );
1601                 }
1602                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1603                         $label = isset( $item['legend'] ) ? $item['legend'] : $item['title'];
1604                         $letter = $item['letter'];
1605                         $cssClass = isset( $item['class'] ) ? $item['class'] : $key;
1606
1607                         $legend .= Html::element( 'dt',
1608                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1609                         ) . "\n" .
1610                         Html::rawElement( 'dd',
1611                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1612                                 $context->msg( $label )->parse()
1613                         ) . "\n";
1614                 }
1615                 # (+-123)
1616                 $legend .= Html::rawElement( 'dt',
1617                         [ 'class' => 'mw-plusminus-pos' ],
1618                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1619                 ) . "\n";
1620                 $legend .= Html::element(
1621                         'dd',
1622                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1623                         $context->msg( 'recentchanges-label-plusminus' )->text()
1624                 ) . "\n";
1625                 $legend .= Html::closeElement( 'dl' ) . "\n";
1626
1627                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1628                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1629                         $context->msg( 'recentchanges-legend-heading' )->parse();
1630
1631                 # Collapsible
1632                 $collapsedState = $this->getRequest()->getCookie( 'changeslist-state' );
1633                 $collapsedClass = $collapsedState === 'collapsed' ? ' mw-collapsed' : '';
1634
1635                 $legend =
1636                         '<div class="mw-changeslist-legend mw-collapsible' . $collapsedClass . '">' .
1637                                 $legendHeading .
1638                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1639                         '</div>';
1640
1641                 return $legend;
1642         }
1643
1644         /**
1645          * Add page-specific modules.
1646          */
1647         protected function addModules() {
1648                 $out = $this->getOutput();
1649                 // Styles and behavior for the legend box (see makeLegend())
1650                 $out->addModuleStyles( [
1651                         'mediawiki.special.changeslist.legend',
1652                         'mediawiki.special.changeslist',
1653                 ] );
1654                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1655
1656                 if ( $this->isStructuredFilterUiEnabled() && !$this->including() ) {
1657                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1658                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1659                 }
1660         }
1661
1662         protected function getGroupName() {
1663                 return 'changes';
1664         }
1665
1666         /**
1667          * Filter on users' experience levels; this will not be called if nothing is
1668          * selected.
1669          *
1670          * @param string $specialPageClassName Class name of current special page
1671          * @param IContextSource $context Context, for e.g. user
1672          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1673          * @param array &$tables Array of tables; see IDatabase::select $table
1674          * @param array &$fields Array of fields; see IDatabase::select $vars
1675          * @param array &$conds Array of conditions; see IDatabase::select $conds
1676          * @param array &$query_options Array of query options; see IDatabase::select $options
1677          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1678          * @param array $selectedExpLevels The allowed active values, sorted
1679          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1680          *   (optional)
1681          */
1682         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1683                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1684         ) {
1685                 global $wgLearnerEdits,
1686                         $wgExperiencedUserEdits,
1687                         $wgLearnerMemberSince,
1688                         $wgExperiencedUserMemberSince;
1689
1690                 $LEVEL_COUNT = 5;
1691
1692                 // If all levels are selected, don't filter
1693                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1694                         return;
1695                 }
1696
1697                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1698                 if (
1699                         in_array( 'registered', $selectedExpLevels ) &&
1700                         in_array( 'unregistered', $selectedExpLevels )
1701                 ) {
1702                         return;
1703                 }
1704
1705                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1706                 if (
1707                         in_array( 'registered', $selectedExpLevels ) &&
1708                         !in_array( 'unregistered', $selectedExpLevels )
1709                 ) {
1710                         $conds[] = 'rc_user != 0';
1711                         return;
1712                 }
1713
1714                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1715                         $conds[] = 'rc_user = 0';
1716                         return;
1717                 }
1718
1719                 $tables[] = 'user';
1720                 $join_conds['user'] = [ 'LEFT JOIN', 'rc_user = user_id' ];
1721
1722                 if ( $now === 0 ) {
1723                         $now = time();
1724                 }
1725                 $secondsPerDay = 86400;
1726                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1727                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1728
1729                 $aboveNewcomer = $dbr->makeList(
1730                         [
1731                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1732                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1733                         ],
1734                         IDatabase::LIST_AND
1735                 );
1736
1737                 $aboveLearner = $dbr->makeList(
1738                         [
1739                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1740                                 'user_registration <= ' .
1741                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1742                         ],
1743                         IDatabase::LIST_AND
1744                 );
1745
1746                 $conditions = [];
1747
1748                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1749                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1750                         $conditions[] = 'rc_user = 0';
1751                 }
1752
1753                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1754                         $conditions[] = "NOT ( $aboveNewcomer )";
1755                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1756                         $conditions[] = $dbr->makeList(
1757                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1758                                 IDatabase::LIST_AND
1759                         );
1760                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1761                         $conditions[] = $aboveLearner;
1762                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1763                         $conditions[] = "NOT ( $aboveLearner )";
1764                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1765                         $conditions[] = $dbr->makeList(
1766                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1767                                 IDatabase::LIST_OR
1768                         );
1769                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1770                         $conditions[] = $aboveNewcomer;
1771                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1772                         $conditions[] = 'rc_user != 0';
1773                 }
1774
1775                 if ( count( $conditions ) > 1 ) {
1776                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1777                 } elseif ( count( $conditions ) === 1 ) {
1778                         $conds[] = reset( $conditions );
1779                 }
1780         }
1781
1782         /**
1783          * Check whether the structured filter UI is enabled
1784          *
1785          * @return bool
1786          */
1787         public function isStructuredFilterUiEnabled() {
1788                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1789                         return true;
1790                 }
1791
1792                 return static::checkStructuredFilterUiEnabled(
1793                         $this->getConfig(),
1794                         $this->getUser()
1795                 );
1796         }
1797
1798         /**
1799          * Check whether the structured filter UI is enabled by default (regardless of
1800          * this particular user's setting)
1801          *
1802          * @return bool
1803          */
1804         public function isStructuredFilterUiEnabledByDefault() {
1805                 if ( $this->getConfig()->get( 'StructuredChangeFiltersShowPreference' ) ) {
1806                         return !$this->getUser()->getDefaultOption( 'rcenhancedfilters-disable' );
1807                 } else {
1808                         return $this->getUser()->getDefaultOption( 'rcenhancedfilters' );
1809                 }
1810         }
1811
1812         /**
1813          * Static method to check whether StructuredFilter UI is enabled for the given user
1814          *
1815          * @since 1.31
1816          * @param Config $config
1817          * @param User $user
1818          * @return bool
1819          */
1820         public static function checkStructuredFilterUiEnabled( Config $config, User $user ) {
1821                 if ( $config->get( 'StructuredChangeFiltersShowPreference' ) ) {
1822                         return !$user->getOption( 'rcenhancedfilters-disable' );
1823                 } else {
1824                         return $user->getOption( 'rcenhancedfilters' );
1825                 }
1826         }
1827
1828         /**
1829          * Get the default value of the number of changes to display when loading
1830          * the result set.
1831          *
1832          * @since 1.30
1833          * @return int
1834          */
1835         public function getDefaultLimit() {
1836                 return $this->getUser()->getIntOption( static::$limitPreferenceName );
1837         }
1838
1839         /**
1840          * Get the default value of the number of days to display when loading
1841          * the result set.
1842          * Supports fractional values, and should be cast to a float.
1843          *
1844          * @since 1.30
1845          * @return float
1846          */
1847         public function getDefaultDays() {
1848                 return floatval( $this->getUser()->getOption( static::$daysPreferenceName ) );
1849         }
1850 }