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