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 : 204;
 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                                 'wgRCFiltersChangeTags',
 607                                 $this->buildChangeTagList()
 608                         );
 609                         $out->addJsConfigVars(
 610                                 'StructuredChangeFiltersDisplayConfig',
 611                                 [
 612                                         'maxDays' => (int)$this->getConfig()->get( 'RCMaxAge' ) / ( 24 * 3600 ), // Translate to days
 613                                         'limitArray' => $this->getConfig()->get( 'RCLinkLimits' ),
 614                                         'limitDefault' => $this->getDefaultLimit(),
 615                                         'daysArray' => $this->getConfig()->get( 'RCLinkDays' ),
 616                                         'daysDefault' => $this->getDefaultDays(),
 617                                 ]
 618                         );
 619                 } else {
 620                         $out->addBodyClasses( 'mw-rcfilters-disabled' );
 621                 }
 622         }
 623
 624         /**
 625          * Fetch the change tags list for the front end
 626          *
 627          * @return Array Tag data
 628          */
 629         protected function buildChangeTagList() {
 630                 $explicitlyDefinedTags = array_fill_keys( ChangeTags::listExplicitlyDefinedTags(), 0 );
 631                 $softwareActivatedTags = array_fill_keys( ChangeTags::listSoftwareActivatedTags(), 0 );
 632
 633                 // Hit counts disabled for perf reasons, see T169997
 634                 /*
 635                 $tagStats = ChangeTags::tagUsageStatistics();
 636                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags, $tagStats );
 637
 638                 // Sort by hits
 639                 arsort( $tagHitCounts );
 640                 */
 641                 $tagHitCounts = array_merge( $explicitlyDefinedTags, $softwareActivatedTags );
 642
 643                 // Build the list and data
 644                 $result = [];
 645                 foreach ( $tagHitCounts as $tagName => $hits ) {
 646                         if (
 647                                 // Only get active tags
 648                                 isset( $explicitlyDefinedTags[ $tagName ] ) ||
 649                                 isset( $softwareActivatedTags[ $tagName ] )
 650                         ) {
 651                                 // Parse description
 652                                 $desc = ChangeTags::tagLongDescriptionMessage( $tagName, $this->getContext() );
 653
 654                                 $result[] = [
 655                                         'name' => $tagName,
 656                                         'label' => Sanitizer::stripAllTags(
 657                                                 ChangeTags::tagDescription( $tagName, $this->getContext() )
 658                                         ),
 659                                         'description' => $desc ? Sanitizer::stripAllTags( $desc->parse() ) : '',
 660                                         'cssClass' => Sanitizer::escapeClass( 'mw-tag-' . $tagName ),
 661                                         'hits' => $hits,
 662                                 ];
 663                         }
 664                 }
 665
 666                 // Instead of sorting by hit count (disabled, see above), sort by display name
 667                 usort( $result, function ( $a, $b ) {
 668                         return strcasecmp( $a['label'], $b['label'] );
 669                 } );
 670
 671                 return $result;
 672         }
 673
 674         /**
 675          * Add the "no results" message to the output
 676          */
 677         protected function outputNoResults() {
 678                 $this->getOutput()->addHTML(
 679                         '<div class="mw-changeslist-empty">' .
 680                         $this->msg( 'recentchanges-noresult' )->parse() .
 681                         '</div>'
 682                 );
 683         }
 684
 685         /**
 686          * Get the database result for this special page instance. Used by ApiFeedRecentChanges.
 687          *
 688          * @return bool|ResultWrapper Result or false
 689          */
 690         public function getRows() {
 691                 $opts = $this->getOptions();
 692
 693                 $tables = [];
 694                 $fields = [];
 695                 $conds = [];
 696                 $query_options = [];
 697                 $join_conds = [];
 698                 $this->buildQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 699
 700                 return $this->doMainQuery( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 701         }
 702
 703         /**
 704          * Get the current FormOptions for this request
 705          *
 706          * @return FormOptions
 707          */
 708         public function getOptions() {
 709                 if ( $this->rcOptions === null ) {
 710                         $this->rcOptions = $this->setup( $this->rcSubpage );
 711                 }
 712
 713                 return $this->rcOptions;
 714         }
 715
 716         /**
 717          * Register all filters and their groups (including those from hooks), plus handle
 718          * conflicts and defaults.
 719          *
 720          * You might want to customize these in the same method, in subclasses.  You can
 721          * call getFilterGroup to access a group, and (on the group) getFilter to access a
 722          * filter, then make necessary modfications to the filter or group (e.g. with
 723          * setDefault).
 724          */
 725         protected function registerFilters() {
 726                 $this->registerFiltersFromDefinitions( $this->filterGroupDefinitions );
 727
 728                 // Make sure this is not being transcluded (we don't want to show this
 729                 // information to all users just because the user that saves the edit can
 730                 // patrol or is logged in)
 731                 if ( !$this->including() && $this->getUser()->useRCPatrol() ) {
 732                         $this->registerFiltersFromDefinitions( $this->reviewStatusFilterGroupDefinition );
 733                 }
 734
 735                 $changeTypeGroup = $this->getFilterGroup( 'changeType' );
 736
 737                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 738                         $transformedHideCategorizationDef = $this->transformFilterDefinition(
 739                                 $this->hideCategorizationFilterDefinition
 740                         );
 741
 742                         $transformedHideCategorizationDef['group'] = $changeTypeGroup;
 743
 744                         $hideCategorization = new ChangesListBooleanFilter(
 745                                 $transformedHideCategorizationDef
 746                         );
 747                 }
 748
 749                 Hooks::run( 'ChangesListSpecialPageStructuredFilters', [ $this ] );
 750
 751                 $unstructuredGroupDefinition =
 752                         $this->getFilterGroupDefinitionFromLegacyCustomFilters(
 753                                 $this->getCustomFilters()
 754                         );
 755                 $this->registerFiltersFromDefinitions( [ $unstructuredGroupDefinition ] );
 756
 757                 $userExperienceLevel = $this->getFilterGroup( 'userExpLevel' );
 758                 $registered = $userExperienceLevel->getFilter( 'registered' );
 759                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'newcomer' ) );
 760                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'learner' ) );
 761                 $registered->setAsSupersetOf( $userExperienceLevel->getFilter( 'experienced' ) );
 762
 763                 $categoryFilter = $changeTypeGroup->getFilter( 'hidecategorization' );
 764                 $logactionsFilter = $changeTypeGroup->getFilter( 'hidelog' );
 765                 $pagecreationFilter = $changeTypeGroup->getFilter( 'hidenewpages' );
 766
 767                 $significanceTypeGroup = $this->getFilterGroup( 'significance' );
 768                 $hideMinorFilter = $significanceTypeGroup->getFilter( 'hideminor' );
 769
 770                 // categoryFilter is conditional; see registerFilters
 771                 if ( $categoryFilter !== null ) {
 772                         $hideMinorFilter->conflictsWith(
 773                                 $categoryFilter,
 774                                 'rcfilters-hideminor-conflicts-typeofchange-global',
 775                                 'rcfilters-hideminor-conflicts-typeofchange',
 776                                 'rcfilters-typeofchange-conflicts-hideminor'
 777                         );
 778                 }
 779                 $hideMinorFilter->conflictsWith(
 780                         $logactionsFilter,
 781                         'rcfilters-hideminor-conflicts-typeofchange-global',
 782                         'rcfilters-hideminor-conflicts-typeofchange',
 783                         'rcfilters-typeofchange-conflicts-hideminor'
 784                 );
 785                 $hideMinorFilter->conflictsWith(
 786                         $pagecreationFilter,
 787                         'rcfilters-hideminor-conflicts-typeofchange-global',
 788                         'rcfilters-hideminor-conflicts-typeofchange',
 789                         'rcfilters-typeofchange-conflicts-hideminor'
 790                 );
 791         }
 792
 793         /**
 794          * Transforms filter definition to prepare it for constructor.
 795          *
 796          * See overrides of this method as well.
 797          *
 798          * @param array $filterDefinition Original filter definition
 799          *
 800          * @return array Transformed definition
 801          */
 802         protected function transformFilterDefinition( array $filterDefinition ) {
 803                 return $filterDefinition;
 804         }
 805
 806         /**
 807          * Register filters from a definition object
 808          *
 809          * Array specifying groups and their filters; see Filter and
 810          * ChangesListFilterGroup constructors.
 811          *
 812          * There is light processing to simplify core maintenance.
 813          * @param array $definition
 814          */
 815         protected function registerFiltersFromDefinitions( array $definition ) {
 816                 $autoFillPriority = -1;
 817                 foreach ( $definition as $groupDefinition ) {
 818                         if ( !isset( $groupDefinition['priority'] ) ) {
 819                                 $groupDefinition['priority'] = $autoFillPriority;
 820                         } else {
 821                                 // If it's explicitly specified, start over the auto-fill
 822                                 $autoFillPriority = $groupDefinition['priority'];
 823                         }
 824
 825                         $autoFillPriority--;
 826
 827                         $className = $groupDefinition['class'];
 828                         unset( $groupDefinition['class'] );
 829
 830                         foreach ( $groupDefinition['filters'] as &$filterDefinition ) {
 831                                 $filterDefinition = $this->transformFilterDefinition( $filterDefinition );
 832                         }
 833
 834                         $this->registerFilterGroup( new $className( $groupDefinition ) );
 835                 }
 836         }
 837
 838         /**
 839          * Get filter group definition from legacy custom filters
 840          *
 841          * @param array $customFilters Custom filters from legacy hooks
 842          * @return array Group definition
 843          */
 844         protected function getFilterGroupDefinitionFromLegacyCustomFilters( array $customFilters ) {
 845                 // Special internal unstructured group
 846                 $unstructuredGroupDefinition = [
 847                         'name' => 'unstructured',
 848                         'class' => ChangesListBooleanFilterGroup::class,
 849                         'priority' => -1, // Won't display in structured
 850                         'filters' => [],
 851                 ];
 852
 853                 foreach ( $customFilters as $name => $params ) {
 854                         $unstructuredGroupDefinition['filters'][] = [
 855                                 'name' => $name,
 856                                 'showHide' => $params['msg'],
 857                                 'default' => $params['default'],
 858                         ];
 859                 }
 860
 861                 return $unstructuredGroupDefinition;
 862         }
 863
 864         /**
 865          * Register all the filters, including legacy hook-driven ones.
 866          * Then create a FormOptions object with options as specified by the user
 867          *
 868          * @param array $parameters
 869          *
 870          * @return FormOptions
 871          */
 872         public function setup( $parameters ) {
 873                 $this->registerFilters();
 874
 875                 $opts = $this->getDefaultOptions();
 876
 877                 $opts = $this->fetchOptionsFromRequest( $opts );
 878
 879                 // Give precedence to subpage syntax
 880                 if ( $parameters !== null ) {
 881                         $this->parseParameters( $parameters, $opts );
 882                 }
 883
 884                 $this->validateOptions( $opts );
 885
 886                 return $opts;
 887         }
 888
 889         /**
 890          * Get a FormOptions object containing the default options. By default, returns
 891          * some basic options.  The filters listed explicitly here are overriden in this
 892          * method, in subclasses, but most filters (e.g. hideminor, userExpLevel filters,
 893          * and more) are structured.  Structured filters are overriden in registerFilters.
 894          * not here.
 895          *
 896          * @return FormOptions
 897          */
 898         public function getDefaultOptions() {
 899                 $opts = new FormOptions();
 900                 $structuredUI = $this->isStructuredFilterUiEnabled();
 901                 // If urlversion=2 is set, ignore the filter defaults and set them all to false/empty
 902                 $useDefaults = $this->getRequest()->getInt( 'urlversion' ) !== 2;
 903
 904                 // Add all filters
 905                 /** @var ChangesListFilterGroup $filterGroup */
 906                 foreach ( $this->filterGroups as $filterGroup ) {
 907                         // URL parameters can be per-group, like 'userExpLevel',
 908                         // or per-filter, like 'hideminor'.
 909                         if ( $filterGroup->isPerGroupRequestParameter() ) {
 910                                 $opts->add( $filterGroup->getName(), $useDefaults ? $filterGroup->getDefault() : '' );
 911                         } else {
 912                                 /** @var ChangesListBooleanFilter $filter */
 913                                 foreach ( $filterGroup->getFilters() as $filter ) {
 914                                         $opts->add( $filter->getName(), $useDefaults ? $filter->getDefault( $structuredUI ) : false );
 915                                 }
 916                         }
 917                 }
 918
 919                 $opts->add( 'namespace', '', FormOptions::STRING );
 920                 $opts->add( 'invert', false );
 921                 $opts->add( 'associated', false );
 922                 $opts->add( 'urlversion', 1 );
 923                 $opts->add( 'tagfilter', '' );
 924
 925                 return $opts;
 926         }
 927
 928         /**
 929          * Register a structured changes list filter group
 930          *
 931          * @param ChangesListFilterGroup $group
 932          */
 933         public function registerFilterGroup( ChangesListFilterGroup $group ) {
 934                 $groupName = $group->getName();
 935
 936                 $this->filterGroups[$groupName] = $group;
 937         }
 938
 939         /**
 940          * Gets the currently registered filters groups
 941          *
 942          * @return array Associative array of ChangesListFilterGroup objects, with group name as key
 943          */
 944         protected function getFilterGroups() {
 945                 return $this->filterGroups;
 946         }
 947
 948         /**
 949          * Gets a specified ChangesListFilterGroup by name
 950          *
 951          * @param string $groupName Name of group
 952          *
 953          * @return ChangesListFilterGroup|null Group, or null if not registered
 954          */
 955         public function getFilterGroup( $groupName ) {
 956                 return isset( $this->filterGroups[$groupName] ) ?
 957                         $this->filterGroups[$groupName] :
 958                         null;
 959         }
 960
 961         // Currently, this intentionally only includes filters that display
 962         // in the structured UI.  This can be changed easily, though, if we want
 963         // to include data on filters that use the unstructured UI.  messageKeys is a
 964         // special top-level value, with the value being an array of the message keys to
 965         // send to the client.
 966         /**
 967          * Gets structured filter information needed by JS
 968          *
 969          * @return array Associative array
 970          * * array $return['groups'] Group data
 971          * * array $return['messageKeys'] Array of message keys
 972          */
 973         public function getStructuredFilterJsData() {
 974                 $output = [
 975                         'groups' => [],
 976                         'messageKeys' => [],
 977                 ];
 978
 979                 usort( $this->filterGroups, function ( $a, $b ) {
 980                         return $b->getPriority() - $a->getPriority();
 981                 } );
 982
 983                 foreach ( $this->filterGroups as $groupName => $group ) {
 984                         $groupOutput = $group->getJsData( $this );
 985                         if ( $groupOutput !== null ) {
 986                                 $output['messageKeys'] = array_merge(
 987                                         $output['messageKeys'],
 988                                         $groupOutput['messageKeys']
 989                                 );
 990
 991                                 unset( $groupOutput['messageKeys'] );
 992                                 $output['groups'][] = $groupOutput;
 993                         }
 994                 }
 995
 996                 return $output;
 997         }
 998
 999         /**
1000          * Get custom show/hide filters using deprecated ChangesListSpecialPageFilters
1001          * hook.
1002          *
1003          * @return array Map of filter URL param names to properties (msg/default)
1004          */
1005         protected function getCustomFilters() {
1006                 if ( $this->customFilters === null ) {
1007                         $this->customFilters = [];
1008                         Hooks::run( 'ChangesListSpecialPageFilters', [ $this, &$this->customFilters ], '1.29' );
1009                 }
1010
1011                 return $this->customFilters;
1012         }
1013
1014         /**
1015          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
1016          *
1017          * Intended for subclassing, e.g. to add a backwards-compatibility layer.
1018          *
1019          * @param FormOptions $opts
1020          * @return FormOptions
1021          */
1022         protected function fetchOptionsFromRequest( $opts ) {
1023                 $opts->fetchValuesFromRequest( $this->getRequest() );
1024
1025                 return $opts;
1026         }
1027
1028         /**
1029          * Process $par and put options found in $opts. Used when including the page.
1030          *
1031          * @param string $par
1032          * @param FormOptions $opts
1033          */
1034         public function parseParameters( $par, FormOptions $opts ) {
1035                 $stringParameterNameSet = [];
1036                 $hideParameterNameSet = [];
1037
1038                 // URL parameters can be per-group, like 'userExpLevel',
1039                 // or per-filter, like 'hideminor'.
1040
1041                 foreach ( $this->filterGroups as $filterGroup ) {
1042                         if ( $filterGroup->isPerGroupRequestParameter() ) {
1043                                 $stringParameterNameSet[$filterGroup->getName()] = true;
1044                         } elseif ( $filterGroup->getType() === ChangesListBooleanFilterGroup::TYPE ) {
1045                                 foreach ( $filterGroup->getFilters() as $filter ) {
1046                                         $hideParameterNameSet[$filter->getName()] = true;
1047                                 }
1048                         }
1049                 }
1050
1051                 $bits = preg_split( '/\s*,\s*/', trim( $par ) );
1052                 foreach ( $bits as $bit ) {
1053                         $m = [];
1054                         if ( isset( $hideParameterNameSet[$bit] ) ) {
1055                                 // hidefoo => hidefoo=true
1056                                 $opts[$bit] = true;
1057                         } elseif ( isset( $hideParameterNameSet["hide$bit"] ) ) {
1058                                 // foo => hidefoo=false
1059                                 $opts["hide$bit"] = false;
1060                         } elseif ( preg_match( '/^(.*)=(.*)$/', $bit, $m ) ) {
1061                                 if ( isset( $stringParameterNameSet[$m[1]] ) ) {
1062                                         $opts[$m[1]] = $m[2];
1063                                 }
1064                         }
1065                 }
1066         }
1067
1068         /**
1069          * Validate a FormOptions object generated by getDefaultOptions() with values already populated.
1070          *
1071          * @param FormOptions $opts
1072          */
1073         public function validateOptions( FormOptions $opts ) {
1074                 if ( $this->fixContradictoryOptions( $opts ) ) {
1075                         $query = wfArrayToCgi( $this->convertParamsForLink( $opts->getChangedValues() ) );
1076                         $this->getOutput()->redirect( $this->getPageTitle()->getCanonicalURL( $query ) );
1077                 }
1078         }
1079
1080         /**
1081          * Fix invalid options by resetting pairs that should never appear together.
1082          *
1083          * @param FormOptions $opts
1084          * @return bool True if any option was reset
1085          */
1086         private function fixContradictoryOptions( FormOptions $opts ) {
1087                 $fixed = $this->fixBackwardsCompatibilityOptions( $opts );
1088
1089                 foreach ( $this->filterGroups as $filterGroup ) {
1090                         if ( $filterGroup instanceof ChangesListBooleanFilterGroup ) {
1091                                 $filters = $filterGroup->getFilters();
1092
1093                                 if ( count( $filters ) === 1 ) {
1094                                         // legacy boolean filters should not be considered
1095                                         continue;
1096                                 }
1097
1098                                 $allInGroupEnabled = array_reduce(
1099                                         $filters,
1100                                         function ( $carry, $filter ) use ( $opts ) {
1101                                                 return $carry && $opts[ $filter->getName() ];
1102                                         },
1103                                         /* initialValue */ count( $filters ) > 0
1104                                 );
1105
1106                                 if ( $allInGroupEnabled ) {
1107                                         foreach ( $filters as $filter ) {
1108                                                 $opts[ $filter->getName() ] = false;
1109                                         }
1110
1111                                         $fixed = true;
1112                                 }
1113                         }
1114                 }
1115
1116                 return $fixed;
1117         }
1118
1119         /**
1120          * Fix a special case (hideanons=1 and hideliu=1) in a special way, for backwards
1121          * compatibility.
1122          *
1123          * This is deprecated and may be removed.
1124          *
1125          * @param FormOptions $opts
1126          * @return bool True if this change was mode
1127          */
1128         private function fixBackwardsCompatibilityOptions( FormOptions $opts ) {
1129                 if ( $opts['hideanons'] && $opts['hideliu'] ) {
1130                         $opts->reset( 'hideanons' );
1131                         if ( !$opts['hidebots'] ) {
1132                                 $opts->reset( 'hideliu' );
1133                                 $opts['hidehumans'] = 1;
1134                         }
1135
1136                         return true;
1137                 }
1138
1139                 return false;
1140         }
1141
1142         /**
1143          * Convert parameters values from true/false to 1/0
1144          * so they are not omitted by wfArrayToCgi()
1145          * Bug 36524
1146          *
1147          * @param array $params
1148          * @return array
1149          */
1150         protected function convertParamsForLink( $params ) {
1151                 foreach ( $params as &$value ) {
1152                         if ( $value === false ) {
1153                                 $value = '0';
1154                         }
1155                 }
1156                 unset( $value );
1157                 return $params;
1158         }
1159
1160         /**
1161          * Sets appropriate tables, fields, conditions, etc. depending on which filters
1162          * the user requested.
1163          *
1164          * @param array &$tables Array of tables; see IDatabase::select $table
1165          * @param array &$fields Array of fields; see IDatabase::select $vars
1166          * @param array &$conds Array of conditions; see IDatabase::select $conds
1167          * @param array &$query_options Array of query options; see IDatabase::select $options
1168          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1169          * @param FormOptions $opts
1170          */
1171         protected function buildQuery( &$tables, &$fields, &$conds, &$query_options,
1172                 &$join_conds, FormOptions $opts
1173         ) {
1174                 $dbr = $this->getDB();
1175                 $isStructuredUI = $this->isStructuredFilterUiEnabled();
1176
1177                 foreach ( $this->filterGroups as $filterGroup ) {
1178                         // URL parameters can be per-group, like 'userExpLevel',
1179                         // or per-filter, like 'hideminor'.
1180                         if ( $filterGroup->isPerGroupRequestParameter() ) {
1181                                 $filterGroup->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1182                                         $query_options, $join_conds, $opts[$filterGroup->getName()] );
1183                         } else {
1184                                 foreach ( $filterGroup->getFilters() as $filter ) {
1185                                         if ( $filter->isActive( $opts, $isStructuredUI ) ) {
1186                                                 $filter->modifyQuery( $dbr, $this, $tables, $fields, $conds,
1187                                                         $query_options, $join_conds );
1188                                         }
1189                                 }
1190                         }
1191                 }
1192
1193                 // Namespace filtering
1194                 if ( $opts[ 'namespace' ] !== '' ) {
1195                         $namespaces = explode( ';', $opts[ 'namespace' ] );
1196
1197                         if ( $opts[ 'associated' ] ) {
1198                                 $associatedNamespaces = array_map(
1199                                         function ( $ns ) {
1200                                                 return MWNamespace::getAssociated( $ns );
1201                                         },
1202                                         $namespaces
1203                                 );
1204                                 $namespaces = array_unique( array_merge( $namespaces, $associatedNamespaces ) );
1205                         }
1206
1207                         if ( count( $namespaces ) === 1 ) {
1208                                 $operator = $opts[ 'invert' ] ? '!=' : '=';
1209                                 $value = $dbr->addQuotes( reset( $namespaces ) );
1210                         } else {
1211                                 $operator = $opts[ 'invert' ] ? 'NOT IN' : 'IN';
1212                                 sort( $namespaces );
1213                                 $value = '(' . $dbr->makeList( $namespaces ) . ')';
1214                         }
1215                         $conds[] = "rc_namespace $operator $value";
1216                 }
1217         }
1218
1219         /**
1220          * Process the query
1221          *
1222          * @param array $tables Array of tables; see IDatabase::select $table
1223          * @param array $fields Array of fields; see IDatabase::select $vars
1224          * @param array $conds Array of conditions; see IDatabase::select $conds
1225          * @param array $query_options Array of query options; see IDatabase::select $options
1226          * @param array $join_conds Array of join conditions; see IDatabase::select $join_conds
1227          * @param FormOptions $opts
1228          * @return bool|ResultWrapper Result or false
1229          */
1230         protected function doMainQuery( $tables, $fields, $conds,
1231                 $query_options, $join_conds, FormOptions $opts
1232         ) {
1233                 $tables[] = 'recentchanges';
1234                 $fields = array_merge( RecentChange::selectFields(), $fields );
1235
1236                 ChangeTags::modifyDisplayQuery(
1237                         $tables,
1238                         $fields,
1239                         $conds,
1240                         $join_conds,
1241                         $query_options,
1242                         ''
1243                 );
1244
1245                 if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
1246                         $opts )
1247                 ) {
1248                         return false;
1249                 }
1250
1251                 $dbr = $this->getDB();
1252
1253                 return $dbr->select(
1254                         $tables,
1255                         $fields,
1256                         $conds,
1257                         __METHOD__,
1258                         $query_options,
1259                         $join_conds
1260                 );
1261         }
1262
1263         protected function runMainQueryHook( &$tables, &$fields, &$conds,
1264                 &$query_options, &$join_conds, $opts
1265         ) {
1266                 return Hooks::run(
1267                         'ChangesListSpecialPageQuery',
1268                         [ $this->getName(), &$tables, &$fields, &$conds, &$query_options, &$join_conds, $opts ]
1269                 );
1270         }
1271
1272         /**
1273          * Return a IDatabase object for reading
1274          *
1275          * @return IDatabase
1276          */
1277         protected function getDB() {
1278                 return wfGetDB( DB_REPLICA );
1279         }
1280
1281         /**
1282          * Send output to the OutputPage object, only called if not used feeds
1283          *
1284          * @param ResultWrapper $rows Database rows
1285          * @param FormOptions $opts
1286          */
1287         public function webOutput( $rows, $opts ) {
1288                 if ( !$this->including() ) {
1289                         $this->outputFeedLinks();
1290                         $this->doHeader( $opts, $rows->numRows() );
1291                 }
1292
1293                 $this->outputChangesList( $rows, $opts );
1294         }
1295
1296         /**
1297          * Output feed links.
1298          */
1299         public function outputFeedLinks() {
1300                 // nothing by default
1301         }
1302
1303         /**
1304          * Build and output the actual changes list.
1305          *
1306          * @param ResultWrapper $rows Database rows
1307          * @param FormOptions $opts
1308          */
1309         abstract public function outputChangesList( $rows, $opts );
1310
1311         /**
1312          * Set the text to be displayed above the changes
1313          *
1314          * @param FormOptions $opts
1315          * @param int $numRows Number of rows in the result to show after this header
1316          */
1317         public function doHeader( $opts, $numRows ) {
1318                 $this->setTopText( $opts );
1319
1320                 // @todo Lots of stuff should be done here.
1321
1322                 $this->setBottomText( $opts );
1323         }
1324
1325         /**
1326          * Send the text to be displayed before the options. Should use $this->getOutput()->addWikiText()
1327          * or similar methods to print the text.
1328          *
1329          * @param FormOptions $opts
1330          */
1331         public function setTopText( FormOptions $opts ) {
1332                 // nothing by default
1333         }
1334
1335         /**
1336          * Send the text to be displayed after the options. Should use $this->getOutput()->addWikiText()
1337          * or similar methods to print the text.
1338          *
1339          * @param FormOptions $opts
1340          */
1341         public function setBottomText( FormOptions $opts ) {
1342                 // nothing by default
1343         }
1344
1345         /**
1346          * Get options to be displayed in a form
1347          * @todo This should handle options returned by getDefaultOptions().
1348          * @todo Not called by anything in this class (but is in subclasses), should be
1349          * called by something… doHeader() maybe?
1350          *
1351          * @param FormOptions $opts
1352          * @return array
1353          */
1354         public function getExtraOptions( $opts ) {
1355                 return [];
1356         }
1357
1358         /**
1359          * Return the legend displayed within the fieldset
1360          *
1361          * @return string
1362          */
1363         public function makeLegend() {
1364                 $context = $this->getContext();
1365                 $user = $context->getUser();
1366                 # The legend showing what the letters and stuff mean
1367                 $legend = Html::openElement( 'dl' ) . "\n";
1368                 # Iterates through them and gets the messages for both letter and tooltip
1369                 $legendItems = $context->getConfig()->get( 'RecentChangesFlags' );
1370                 if ( !( $user->useRCPatrol() || $user->useNPPatrol() ) ) {
1371                         unset( $legendItems['unpatrolled'] );
1372                 }
1373                 foreach ( $legendItems as $key => $item ) { # generate items of the legend
1374                         $label = isset( $item['legend'] ) ? $item['legend'] : $item['title'];
1375                         $letter = $item['letter'];
1376                         $cssClass = isset( $item['class'] ) ? $item['class'] : $key;
1377
1378                         $legend .= Html::element( 'dt',
1379                                 [ 'class' => $cssClass ], $context->msg( $letter )->text()
1380                         ) . "\n" .
1381                         Html::rawElement( 'dd',
1382                                 [ 'class' => Sanitizer::escapeClass( 'mw-changeslist-legend-' . $key ) ],
1383                                 $context->msg( $label )->parse()
1384                         ) . "\n";
1385                 }
1386                 # (+-123)
1387                 $legend .= Html::rawElement( 'dt',
1388                         [ 'class' => 'mw-plusminus-pos' ],
1389                         $context->msg( 'recentchanges-legend-plusminus' )->parse()
1390                 ) . "\n";
1391                 $legend .= Html::element(
1392                         'dd',
1393                         [ 'class' => 'mw-changeslist-legend-plusminus' ],
1394                         $context->msg( 'recentchanges-label-plusminus' )->text()
1395                 ) . "\n";
1396                 $legend .= Html::closeElement( 'dl' ) . "\n";
1397
1398                 $legendHeading = $this->isStructuredFilterUiEnabled() ?
1399                         $context->msg( 'rcfilters-legend-heading' )->parse() :
1400                         $context->msg( 'recentchanges-legend-heading' )->parse();
1401
1402                 # Collapsible
1403                 $legend =
1404                         '<div class="mw-changeslist-legend">' .
1405                                 $legendHeading .
1406                                 '<div class="mw-collapsible-content">' . $legend . '</div>' .
1407                         '</div>';
1408
1409                 return $legend;
1410         }
1411
1412         /**
1413          * Add page-specific modules.
1414          */
1415         protected function addModules() {
1416                 $out = $this->getOutput();
1417                 // Styles and behavior for the legend box (see makeLegend())
1418                 $out->addModuleStyles( [
1419                         'mediawiki.special.changeslist.legend',
1420                         'mediawiki.special.changeslist',
1421                 ] );
1422                 $out->addModules( 'mediawiki.special.changeslist.legend.js' );
1423
1424                 if ( $this->isStructuredFilterUiEnabled() ) {
1425                         $out->addModules( 'mediawiki.rcfilters.filters.ui' );
1426                         $out->addModuleStyles( 'mediawiki.rcfilters.filters.base.styles' );
1427                 }
1428         }
1429
1430         protected function getGroupName() {
1431                 return 'changes';
1432         }
1433
1434         /**
1435          * Filter on users' experience levels; this will not be called if nothing is
1436          * selected.
1437          *
1438          * @param string $specialPageClassName Class name of current special page
1439          * @param IContextSource $context Context, for e.g. user
1440          * @param IDatabase $dbr Database, for addQuotes, makeList, and similar
1441          * @param array &$tables Array of tables; see IDatabase::select $table
1442          * @param array &$fields Array of fields; see IDatabase::select $vars
1443          * @param array &$conds Array of conditions; see IDatabase::select $conds
1444          * @param array &$query_options Array of query options; see IDatabase::select $options
1445          * @param array &$join_conds Array of join conditions; see IDatabase::select $join_conds
1446          * @param array $selectedExpLevels The allowed active values, sorted
1447          * @param int $now Number of seconds since the UNIX epoch, or 0 if not given
1448          *   (optional)
1449          */
1450         public function filterOnUserExperienceLevel( $specialPageClassName, $context, $dbr,
1451                 &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedExpLevels, $now = 0
1452         ) {
1453                 global $wgLearnerEdits,
1454                         $wgExperiencedUserEdits,
1455                         $wgLearnerMemberSince,
1456                         $wgExperiencedUserMemberSince;
1457
1458                 $LEVEL_COUNT = 5;
1459
1460                 // If all levels are selected, don't filter
1461                 if ( count( $selectedExpLevels ) === $LEVEL_COUNT ) {
1462                         return;
1463                 }
1464
1465                 // both 'registered' and 'unregistered', experience levels, if any, are included in 'registered'
1466                 if (
1467                         in_array( 'registered', $selectedExpLevels ) &&
1468                         in_array( 'unregistered', $selectedExpLevels )
1469                 ) {
1470                         return;
1471                 }
1472
1473                 // 'registered' but not 'unregistered', experience levels, if any, are included in 'registered'
1474                 if (
1475                         in_array( 'registered', $selectedExpLevels ) &&
1476                         !in_array( 'unregistered', $selectedExpLevels )
1477                 ) {
1478                         $conds[] = 'rc_user != 0';
1479                         return;
1480                 }
1481
1482                 if ( $selectedExpLevels === [ 'unregistered' ] ) {
1483                         $conds[] = 'rc_user = 0';
1484                         return;
1485                 }
1486
1487                 $tables[] = 'user';
1488                 $join_conds['user'] = [ 'LEFT JOIN', 'rc_user = user_id' ];
1489
1490                 if ( $now === 0 ) {
1491                         $now = time();
1492                 }
1493                 $secondsPerDay = 86400;
1494                 $learnerCutoff = $now - $wgLearnerMemberSince * $secondsPerDay;
1495                 $experiencedUserCutoff = $now - $wgExperiencedUserMemberSince * $secondsPerDay;
1496
1497                 $aboveNewcomer = $dbr->makeList(
1498                         [
1499                                 'user_editcount >= ' . intval( $wgLearnerEdits ),
1500                                 'user_registration <= ' . $dbr->addQuotes( $dbr->timestamp( $learnerCutoff ) ),
1501                         ],
1502                         IDatabase::LIST_AND
1503                 );
1504
1505                 $aboveLearner = $dbr->makeList(
1506                         [
1507                                 'user_editcount >= ' . intval( $wgExperiencedUserEdits ),
1508                                 'user_registration <= ' .
1509                                         $dbr->addQuotes( $dbr->timestamp( $experiencedUserCutoff ) ),
1510                         ],
1511                         IDatabase::LIST_AND
1512                 );
1513
1514                 $conditions = [];
1515
1516                 if ( in_array( 'unregistered', $selectedExpLevels ) ) {
1517                         $selectedExpLevels = array_diff( $selectedExpLevels, [ 'unregistered' ] );
1518                         $conditions[] = 'rc_user = 0';
1519                 }
1520
1521                 if ( $selectedExpLevels === [ 'newcomer' ] ) {
1522                         $conditions[] = "NOT ( $aboveNewcomer )";
1523                 } elseif ( $selectedExpLevels === [ 'learner' ] ) {
1524                         $conditions[] = $dbr->makeList(
1525                                 [ $aboveNewcomer, "NOT ( $aboveLearner )" ],
1526                                 IDatabase::LIST_AND
1527                         );
1528                 } elseif ( $selectedExpLevels === [ 'experienced' ] ) {
1529                         $conditions[] = $aboveLearner;
1530                 } elseif ( $selectedExpLevels === [ 'learner', 'newcomer' ] ) {
1531                         $conditions[] = "NOT ( $aboveLearner )";
1532                 } elseif ( $selectedExpLevels === [ 'experienced', 'newcomer' ] ) {
1533                         $conditions[] = $dbr->makeList(
1534                                 [ "NOT ( $aboveNewcomer )", $aboveLearner ],
1535                                 IDatabase::LIST_OR
1536                         );
1537                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner' ] ) {
1538                         $conditions[] = $aboveNewcomer;
1539                 } elseif ( $selectedExpLevels === [ 'experienced', 'learner', 'newcomer' ] ) {
1540                         $conditions[] = 'rc_user != 0';
1541                 }
1542
1543                 if ( count( $conditions ) > 1 ) {
1544                         $conds[] = $dbr->makeList( $conditions, IDatabase::LIST_OR );
1545                 } elseif ( count( $conditions ) === 1 ) {
1546                         $conds[] = reset( $conditions );
1547                 }
1548         }
1549
1550         /**
1551          * Check whether the structured filter UI is enabled
1552          *
1553          * @return bool
1554          */
1555         public function isStructuredFilterUiEnabled() {
1556                 if ( $this->getRequest()->getBool( 'rcfilters' ) ) {
1557                         return true;
1558                 }
1559
1560                 if ( $this->getConfig()->get( 'StructuredChangeFiltersShowPreference' ) ) {
1561                         return !$this->getUser()->getOption( 'rcenhancedfilters-disable' );
1562                 } else {
1563                         return $this->getUser()->getOption( 'rcenhancedfilters' );
1564                 }
1565         }
1566
1567         /**
1568          * Check whether the structured filter UI is enabled by default (regardless of
1569          * this particular user's setting)
1570          *
1571          * @return bool
1572          */
1573         public function isStructuredFilterUiEnabledByDefault() {
1574                 if ( $this->getConfig()->get( 'StructuredChangeFiltersShowPreference' ) ) {
1575                         return !$this->getUser()->getDefaultOption( 'rcenhancedfilters-disable' );
1576                 } else {
1577                         return $this->getUser()->getDefaultOption( 'rcenhancedfilters' );
1578                 }
1579         }
1580
1581         abstract function getDefaultLimit();
1582
1583         /**
1584          * Get the default value of the number of days to display when loading
1585          * the result set.
1586          * Supports fractional values, and should be cast to a float.
1587          *
1588          * @return float
1589          */
1590         abstract function getDefaultDays();
1591 }