includes/specials/SpecialBlock.php

   1 <?php
   2 /**
   3  * Implements Special:Block
   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
  24 use MediaWiki\Block\BlockRestriction;
  25 use MediaWiki\Block\Restriction\PageRestriction;
  26 use MediaWiki\Block\Restriction\NamespaceRestriction;
  27
  28 /**
  29  * A special page that allows users with 'block' right to block users from
  30  * editing pages and other actions
  31  *
  32  * @ingroup SpecialPage
  33  */
  34 class SpecialBlock extends FormSpecialPage {
  35         /** @var User|string|null User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  36          * or as subpage (Special:Block/Foo) */
  37         protected $target;
  38
  39         /** @var int Block::TYPE_ constant */
  40         protected $type;
  41
  42         /** @var User|string The previous block target */
  43         protected $previousTarget;
  44
  45         /** @var bool Whether the previous submission of the form asked for HideUser */
  46         protected $requestedHideUser;
  47
  48         /** @var bool */
  49         protected $alreadyBlocked;
  50
  51         /** @var array */
  52         protected $preErrors = [];
  53
  54         public function __construct() {
  55                 parent::__construct( 'Block', 'block' );
  56         }
  57
  58         public function doesWrites() {
  59                 return true;
  60         }
  61
  62         /**
  63          * Checks that the user can unblock themselves if they are trying to do so
  64          *
  65          * @param User $user
  66          * @throws ErrorPageError
  67          */
  68         protected function checkExecutePermissions( User $user ) {
  69                 parent::checkExecutePermissions( $user );
  70                 # T17810: blocked admins should have limited access here
  71                 $status = self::checkUnblockSelf( $this->target, $user );
  72                 if ( $status !== true ) {
  73                         throw new ErrorPageError( 'badaccess', $status );
  74                 }
  75         }
  76
  77         /**
  78          * We allow certain special cases where user is blocked
  79          *
  80          * @return bool
  81          */
  82         public function requiresUnblock() {
  83                 return false;
  84         }
  85
  86         /**
  87          * Handle some magic here
  88          *
  89          * @param string $par
  90          */
  91         protected function setParameter( $par ) {
  92                 # Extract variables from the request.  Try not to get into a situation where we
  93                 # need to extract *every* variable from the form just for processing here, but
  94                 # there are legitimate uses for some variables
  95                 $request = $this->getRequest();
  96                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  97                 if ( $this->target instanceof User ) {
  98                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  99                         # User logs, UserRights, etc.
 100                         $this->getSkin()->setRelevantUser( $this->target );
 101                 }
 102
 103                 list( $this->previousTarget, /*...*/ ) =
 104                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
 105                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
 106         }
 107
 108         /**
 109          * Customizes the HTMLForm a bit
 110          *
 111          * @param HTMLForm $form
 112          */
 113         protected function alterForm( HTMLForm $form ) {
 114                 $form->setHeaderText( '' );
 115                 $form->setSubmitDestructive();
 116
 117                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 118                 $form->setSubmitTextMsg( $msg );
 119
 120                 $this->addHelpLink( 'Help:Blocking users' );
 121
 122                 # Don't need to do anything if the form has been posted
 123                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 124                         $s = $form->formatErrors( $this->preErrors );
 125                         if ( $s ) {
 126                                 $form->addHeaderText( Html::rawElement(
 127                                         'div',
 128                                         [ 'class' => 'error' ],
 129                                         $s
 130                                 ) );
 131                         }
 132                 }
 133         }
 134
 135         protected function getDisplayFormat() {
 136                 return 'ooui';
 137         }
 138
 139         /**
 140          * Get the HTMLForm descriptor array for the block form
 141          * @return array
 142          */
 143         protected function getFormFields() {
 144                 global $wgBlockAllowsUTEdit;
 145
 146                 $this->getOutput()->enableOOUI();
 147
 148                 $user = $this->getUser();
 149
 150                 $suggestedDurations = self::getSuggestedDurations();
 151
 152                 $conf = $this->getConfig();
 153                 $enablePartialBlocks = $conf->get( 'EnablePartialBlocks' );
 154
 155                 $a = [];
 156
 157                 $a['Target'] = [
 158                         'type' => 'user',
 159                         'ipallowed' => true,
 160                         'iprange' => true,
 161                         'id' => 'mw-bi-target',
 162                         'size' => '45',
 163                         'autofocus' => true,
 164                         'required' => true,
 165                         'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 166                         'section' => 'target',
 167                 ];
 168
 169                 $a['Editing'] = [
 170                         'type' => 'check',
 171                         'label-message' => 'block-prevent-edit',
 172                         'default' => true,
 173                         'section' => 'actions',
 174                         'disabled' => $enablePartialBlocks ? false : true,
 175                 ];
 176
 177                 if ( $enablePartialBlocks ) {
 178                         $a['EditingRestriction'] = [
 179                                 'type' => 'radio',
 180                                 'cssclass' => 'mw-block-editing-restriction',
 181                                 'options' => [
 182                                         $this->msg( 'ipb-sitewide' )->escaped() .
 183                                                 new \OOUI\LabelWidget( [
 184                                                         'classes' => [ 'oo-ui-inline-help' ],
 185                                                         'label' => $this->msg( 'ipb-sitewide-help' )->text(),
 186                                                 ] ) => 'sitewide',
 187                                         $this->msg( 'ipb-partial' )->escaped() .
 188                                                 new \OOUI\LabelWidget( [
 189                                                         'classes' => [ 'oo-ui-inline-help' ],
 190                                                         'label' => $this->msg( 'ipb-partial-help' )->text(),
 191                                                 ] ) => 'partial',
 192                                 ],
 193                                 'section' => 'actions',
 194                         ];
 195                         $a['PageRestrictions'] = [
 196                                 'type' => 'titlesmultiselect',
 197                                 'label' => $this->msg( 'ipb-pages-label' )->text(),
 198                                 'exists' => true,
 199                                 'max' => 10,
 200                                 'cssclass' => 'mw-block-restriction',
 201                                 'showMissing' => false,
 202                                 'excludeDynamicNamespaces' => true,
 203                                 'input' => [
 204                                         'autocomplete' => false
 205                                 ],
 206                                 'section' => 'actions',
 207                         ];
 208                         $a['NamespaceRestrictions'] = [
 209                                 'type' => 'namespacesmultiselect',
 210                                 'label' => $this->msg( 'ipb-namespaces-label' )->text(),
 211                                 'exists' => true,
 212                                 'cssclass' => 'mw-block-restriction',
 213                                 'input' => [
 214                                         'autocomplete' => false
 215                                 ],
 216                                 'section' => 'actions',
 217                         ];
 218                 }
 219
 220                 $a['CreateAccount'] = [
 221                         'type' => 'check',
 222                         'label-message' => 'ipbcreateaccount',
 223                         'default' => true,
 224                         'section' => 'actions',
 225                 ];
 226
 227                 if ( self::canBlockEmail( $user ) ) {
 228                         $a['DisableEmail'] = [
 229                                 'type' => 'check',
 230                                 'label-message' => 'ipbemailban',
 231                                 'section' => 'actions',
 232                         ];
 233                 }
 234
 235                 if ( $wgBlockAllowsUTEdit ) {
 236                         $a['DisableUTEdit'] = [
 237                                 'type' => 'check',
 238                                 'label-message' => 'ipb-disableusertalk',
 239                                 'default' => false,
 240                                 'section' => 'actions',
 241                         ];
 242                 }
 243
 244                 $a['Expiry'] = [
 245                         'type' => 'expiry',
 246                         'required' => true,
 247                         'options' => $suggestedDurations,
 248                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 249                         'section' => 'expiry',
 250                 ];
 251
 252                 $a['Reason'] = [
 253                         'type' => 'selectandother',
 254                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 255                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 256                         // Unicode codepoints.
 257                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 258                         'maxlength-unit' => 'codepoints',
 259                         'options-message' => 'ipbreason-dropdown',
 260                         'section' => 'reason',
 261                 ];
 262
 263                 $a['AutoBlock'] = [
 264                         'type' => 'check',
 265                         'label-message' => 'ipbenableautoblock',
 266                         'default' => true,
 267                         'section' => 'options',
 268                 ];
 269
 270                 # Allow some users to hide name from block log, blocklist and listusers
 271                 if ( $user->isAllowed( 'hideuser' ) ) {
 272                         $a['HideUser'] = [
 273                                 'type' => 'check',
 274                                 'label-message' => 'ipbhidename',
 275                                 'cssclass' => 'mw-block-hideuser',
 276                                 'section' => 'options',
 277                         ];
 278                 }
 279
 280                 # Watchlist their user page? (Only if user is logged in)
 281                 if ( $user->isLoggedIn() ) {
 282                         $a['Watch'] = [
 283                                 'type' => 'check',
 284                                 'label-message' => 'ipbwatchuser',
 285                                 'section' => 'options',
 286                         ];
 287                 }
 288
 289                 $a['HardBlock'] = [
 290                         'type' => 'check',
 291                         'label-message' => 'ipb-hardblock',
 292                         'default' => false,
 293                         'section' => 'options',
 294                 ];
 295
 296                 # This is basically a copy of the Target field, but the user can't change it, so we
 297                 # can see if the warnings we maybe showed to the user before still apply
 298                 $a['PreviousTarget'] = [
 299                         'type' => 'hidden',
 300                         'default' => false,
 301                 ];
 302
 303                 # We'll turn this into a checkbox if we need to
 304                 $a['Confirm'] = [
 305                         'type' => 'hidden',
 306                         'default' => '',
 307                         'label-message' => 'ipb-confirm',
 308                         'cssclass' => 'mw-block-confirm',
 309                 ];
 310
 311                 // Block Id if a block already exists matching the target
 312                 $a['BlockId'] = [
 313                         'type' => 'hidden',
 314                         'default' => '',
 315                 ];
 316
 317                 // Has the form been submitted
 318                 $a['WasPosted'] = [
 319                         'type' => 'hidden',
 320                         'default' => '',
 321                 ];
 322
 323                 $this->maybeAlterFormDefaults( $a );
 324
 325                 // Allow extensions to add more fields
 326                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 327
 328                 return $a;
 329         }
 330
 331         /**
 332          * If the user has already been blocked with similar settings, load that block
 333          * and change the defaults for the form fields to match the existing settings.
 334          * @param array &$fields HTMLForm descriptor array
 335          */
 336         protected function maybeAlterFormDefaults( &$fields ) {
 337                 # This will be overwritten by request data
 338                 $fields['Target']['default'] = (string)$this->target;
 339
 340                 if ( $this->target ) {
 341                         $status = self::validateTarget( $this->target, $this->getUser() );
 342                         if ( !$status->isOK() ) {
 343                                 $errors = $status->getErrorsArray();
 344                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 345                         }
 346                 }
 347
 348                 # This won't be
 349                 $fields['PreviousTarget']['default'] = (string)$this->target;
 350
 351                 $block = Block::newFromTarget( $this->target );
 352
 353                 // Populate fields if there is a block that is not an autoblock; if it is a range
 354                 // block, only populate the fields if the range is the same as $this->target
 355                 if ( $block instanceof Block && $block->getType() !== Block::TYPE_AUTO
 356                         && ( $this->type != Block::TYPE_RANGE
 357                                 || $block->getTarget() == $this->target )
 358                 ) {
 359                         $fields['HardBlock']['default'] = $block->isHardblock();
 360                         $fields['CreateAccount']['default'] = $block->isCreateAccountBlocked();
 361                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 362
 363                         if ( isset( $fields['DisableEmail'] ) ) {
 364                                 $fields['DisableEmail']['default'] = $block->isEmailBlocked();
 365                         }
 366
 367                         if ( isset( $fields['HideUser'] ) ) {
 368                                 $fields['HideUser']['default'] = $block->getHideName();
 369                         }
 370
 371                         if ( isset( $fields['DisableUTEdit'] ) ) {
 372                                 $fields['DisableUTEdit']['default'] = !$block->isUsertalkEditAllowed();
 373                         }
 374
 375                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 376                         // unless this user also has rights to hideuser: T37839
 377                         if ( !$block->getHideName() || $this->getUser()->isAllowed( 'hideuser' ) ) {
 378                                 $fields['Reason']['default'] = $block->getReason();
 379                         } else {
 380                                 $fields['Reason']['default'] = '';
 381                         }
 382
 383                         if ( $this->getRequest()->wasPosted() ) {
 384                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 385                                 # confirm checkbox; the user will only see it if they haven't previously
 386                                 $fields['Confirm']['type'] = 'check';
 387                         } else {
 388                                 # We got a target, but it wasn't a POST request, so the user must have gone
 389                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 390                                 # as long as they go ahead and block *that* user
 391                                 $fields['Confirm']['default'] = 1;
 392                         }
 393
 394                         if ( $block->getExpiry() == 'infinity' ) {
 395                                 $fields['Expiry']['default'] = 'infinite';
 396                         } else {
 397                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->getExpiry() );
 398                         }
 399
 400                         $fields['BlockId']['default'] = $block->getId();
 401
 402                         $this->alreadyBlocked = true;
 403                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 404                 }
 405
 406                 if ( $this->getRequest()->wasPosted() ) {
 407                         $fields['WasPosted']['default'] = true;
 408                 }
 409
 410                 # We always need confirmation to do HideUser
 411                 if ( $this->requestedHideUser ) {
 412                         $fields['Confirm']['type'] = 'check';
 413                         unset( $fields['Confirm']['default'] );
 414                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 415                 }
 416
 417                 # Or if the user is trying to block themselves
 418                 if ( (string)$this->target === $this->getUser()->getName() ) {
 419                         $fields['Confirm']['type'] = 'check';
 420                         unset( $fields['Confirm']['default'] );
 421                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 422                 }
 423
 424                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 425                         if ( $block instanceof Block && !$block->isSitewide() ) {
 426                                 $fields['EditingRestriction']['default'] = 'partial';
 427                         } else {
 428                                 $fields['EditingRestriction']['default'] = 'sitewide';
 429                         }
 430
 431                         if ( $block instanceof Block ) {
 432                                 $pageRestrictions = [];
 433                                 $namespaceRestrictions = [];
 434                                 foreach ( $block->getRestrictions() as $restriction ) {
 435                                         switch ( $restriction->getType() ) {
 436                                                 case PageRestriction::TYPE:
 437                                                         if ( $restriction->getTitle() ) {
 438                                                                 $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 439                                                         }
 440                                                         break;
 441                                                 case NamespaceRestriction::TYPE:
 442                                                         $namespaceRestrictions[] = $restriction->getValue();
 443                                                         break;
 444                                         }
 445                                 }
 446
 447                                 if (
 448                                         !$block->isSitewide() &&
 449                                         empty( $pageRestrictions ) &&
 450                                         empty( $namespaceRestrictions )
 451                                 ) {
 452                                         $fields['Editing']['default'] = false;
 453                                 }
 454
 455                                 // Sort the restrictions so they are in alphabetical order.
 456                                 sort( $pageRestrictions );
 457                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 458                                 sort( $namespaceRestrictions );
 459                                 $fields['NamespaceRestrictions']['default'] = implode( "\n", $namespaceRestrictions );
 460                         }
 461                 }
 462         }
 463
 464         /**
 465          * Add header elements like block log entries, etc.
 466          * @return string
 467          */
 468         protected function preText() {
 469                 $this->getOutput()->addModuleStyles( [
 470                         'mediawiki.widgets.TagMultiselectWidget.styles',
 471                         'mediawiki.special',
 472                 ] );
 473                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 474
 475                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 476                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 477
 478                 $otherBlockMessages = [];
 479                 if ( $this->target !== null ) {
 480                         $targetName = $this->target;
 481                         if ( $this->target instanceof User ) {
 482                                 $targetName = $this->target->getName();
 483                         }
 484                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 485                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 486
 487                         if ( count( $otherBlockMessages ) ) {
 488                                 $s = Html::rawElement(
 489                                         'h2',
 490                                         [],
 491                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 492                                 ) . "\n";
 493
 494                                 $list = '';
 495
 496                                 foreach ( $otherBlockMessages as $link ) {
 497                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 498                                 }
 499
 500                                 $s .= Html::rawElement(
 501                                         'ul',
 502                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 503                                         $list
 504                                 ) . "\n";
 505
 506                                 $text .= $s;
 507                         }
 508                 }
 509
 510                 return $text;
 511         }
 512
 513         /**
 514          * Add footer elements to the form
 515          * @return string
 516          */
 517         protected function postText() {
 518                 $links = [];
 519
 520                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 521
 522                 $linkRenderer = $this->getLinkRenderer();
 523                 # Link to the user's contributions, if applicable
 524                 if ( $this->target instanceof User ) {
 525                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 526                         $links[] = $linkRenderer->makeLink(
 527                                 $contribsPage,
 528                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 529                         );
 530                 }
 531
 532                 # Link to unblock the specified user, or to a blank unblock form
 533                 if ( $this->target instanceof User ) {
 534                         $message = $this->msg(
 535                                 'ipb-unblock-addr',
 536                                 wfEscapeWikiText( $this->target->getName() )
 537                         )->parse();
 538                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 539                 } else {
 540                         $message = $this->msg( 'ipb-unblock' )->parse();
 541                         $list = SpecialPage::getTitleFor( 'Unblock' );
 542                 }
 543                 $links[] = $linkRenderer->makeKnownLink(
 544                         $list,
 545                         new HtmlArmor( $message )
 546                 );
 547
 548                 # Link to the block list
 549                 $links[] = $linkRenderer->makeKnownLink(
 550                         SpecialPage::getTitleFor( 'BlockList' ),
 551                         $this->msg( 'ipb-blocklist' )->text()
 552                 );
 553
 554                 $user = $this->getUser();
 555
 556                 # Link to edit the block dropdown reasons, if applicable
 557                 if ( $user->isAllowed( 'editinterface' ) ) {
 558                         $links[] = $linkRenderer->makeKnownLink(
 559                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 560                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 561                                 [],
 562                                 [ 'action' => 'edit' ]
 563                         );
 564                 }
 565
 566                 $text = Html::rawElement(
 567                         'p',
 568                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 569                         $this->getLanguage()->pipeList( $links )
 570                 );
 571
 572                 $userTitle = self::getTargetUserTitle( $this->target );
 573                 if ( $userTitle ) {
 574                         # Get relevant extracts from the block and suppression logs, if possible
 575                         $out = '';
 576
 577                         LogEventsList::showLogExtract(
 578                                 $out,
 579                                 'block',
 580                                 $userTitle,
 581                                 '',
 582                                 [
 583                                         'lim' => 10,
 584                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 585                                         'showIfEmpty' => false
 586                                 ]
 587                         );
 588                         $text .= $out;
 589
 590                         # Add suppression block entries if allowed
 591                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 592                                 LogEventsList::showLogExtract(
 593                                         $out,
 594                                         'suppress',
 595                                         $userTitle,
 596                                         '',
 597                                         [
 598                                                 'lim' => 10,
 599                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 600                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 601                                                 'showIfEmpty' => false
 602                                         ]
 603                                 );
 604
 605                                 $text .= $out;
 606                         }
 607                 }
 608
 609                 return $text;
 610         }
 611
 612         /**
 613          * Get a user page target for things like logs.
 614          * This handles account and IP range targets.
 615          * @param User|string $target
 616          * @return Title|null
 617          */
 618         protected static function getTargetUserTitle( $target ) {
 619                 if ( $target instanceof User ) {
 620                         return $target->getUserPage();
 621                 } elseif ( IP::isIPAddress( $target ) ) {
 622                         return Title::makeTitleSafe( NS_USER, $target );
 623                 }
 624
 625                 return null;
 626         }
 627
 628         /**
 629          * Determine the target of the block, and the type of target
 630          * @todo Should be in Block.php?
 631          * @param string $par Subpage parameter passed to setup, or data value from
 632          *     the HTMLForm
 633          * @param WebRequest|null $request Optionally try and get data from a request too
 634          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 635          */
 636         public static function getTargetAndType( $par, WebRequest $request = null ) {
 637                 $i = 0;
 638                 $target = null;
 639
 640                 while ( true ) {
 641                         switch ( $i++ ) {
 642                                 case 0:
 643                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 644                                         # a value use the default, which will be generated from the options
 645                                         # below; so this has to have a higher precedence here than $par, or
 646                                         # we could end up with different values in $this->target and the HTMLForm!
 647                                         if ( $request instanceof WebRequest ) {
 648                                                 $target = $request->getText( 'wpTarget', null );
 649                                         }
 650                                         break;
 651                                 case 1:
 652                                         $target = $par;
 653                                         break;
 654                                 case 2:
 655                                         if ( $request instanceof WebRequest ) {
 656                                                 $target = $request->getText( 'ip', null );
 657                                         }
 658                                         break;
 659                                 case 3:
 660                                         # B/C @since 1.18
 661                                         if ( $request instanceof WebRequest ) {
 662                                                 $target = $request->getText( 'wpBlockAddress', null );
 663                                         }
 664                                         break;
 665                                 case 4:
 666                                         break 2;
 667                         }
 668
 669                         list( $target, $type ) = Block::parseTarget( $target );
 670
 671                         if ( $type !== null ) {
 672                                 return [ $target, $type ];
 673                         }
 674                 }
 675
 676                 return [ null, null ];
 677         }
 678
 679         /**
 680          * HTMLForm field validation-callback for Target field.
 681          * @since 1.18
 682          * @param string $value
 683          * @param array $alldata
 684          * @param HTMLForm $form
 685          * @return Message
 686          */
 687         public static function validateTargetField( $value, $alldata, $form ) {
 688                 $status = self::validateTarget( $value, $form->getUser() );
 689                 if ( !$status->isOK() ) {
 690                         $errors = $status->getErrorsArray();
 691
 692                         return $form->msg( ...$errors[0] );
 693                 } else {
 694                         return true;
 695                 }
 696         }
 697
 698         /**
 699          * Validate a block target.
 700          *
 701          * @since 1.21
 702          * @param string $value Block target to check
 703          * @param User $user Performer of the block
 704          * @return Status
 705          */
 706         public static function validateTarget( $value, User $user ) {
 707                 global $wgBlockCIDRLimit;
 708
 709                 /** @var User $target */
 710                 list( $target, $type ) = self::getTargetAndType( $value );
 711                 $status = Status::newGood( $target );
 712
 713                 if ( $type == Block::TYPE_USER ) {
 714                         if ( $target->isAnon() ) {
 715                                 $status->fatal(
 716                                         'nosuchusershort',
 717                                         wfEscapeWikiText( $target->getName() )
 718                                 );
 719                         }
 720
 721                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 722                         if ( $unblockStatus !== true ) {
 723                                 $status->fatal( 'badaccess', $unblockStatus );
 724                         }
 725                 } elseif ( $type == Block::TYPE_RANGE ) {
 726                         list( $ip, $range ) = explode( '/', $target, 2 );
 727
 728                         if (
 729                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 730                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 731                         ) {
 732                                 // Range block effectively disabled
 733                                 $status->fatal( 'range_block_disabled' );
 734                         }
 735
 736                         if (
 737                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 738                                 ( IP::isIPv6( $ip ) && $range > 128 )
 739                         ) {
 740                                 // Dodgy range
 741                                 $status->fatal( 'ip_range_invalid' );
 742                         }
 743
 744                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 745                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 746                         }
 747
 748                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 749                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 750                         }
 751                 } elseif ( $type == Block::TYPE_IP ) {
 752                         # All is well
 753                 } else {
 754                         $status->fatal( 'badipaddress' );
 755                 }
 756
 757                 return $status;
 758         }
 759
 760         /**
 761          * Given the form data, actually implement a block. This is also called from ApiBlock.
 762          *
 763          * @param array $data
 764          * @param IContextSource $context
 765          * @return bool|string
 766          */
 767         public static function processForm( array $data, IContextSource $context ) {
 768                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 769
 770                 $performer = $context->getUser();
 771                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 772                 $isPartialBlock = $enablePartialBlocks &&
 773                         isset( $data['EditingRestriction'] ) &&
 774                         $data['EditingRestriction'] === 'partial';
 775
 776                 // Handled by field validator callback
 777                 // self::validateTargetField( $data['Target'] );
 778
 779                 # This might have been a hidden field or a checkbox, so interesting data
 780                 # can come from it
 781                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 782
 783                 /** @var User $target */
 784                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 785                 if ( $type == Block::TYPE_USER ) {
 786                         $user = $target;
 787                         $target = $user->getName();
 788                         $userId = $user->getId();
 789
 790                         # Give admins a heads-up before they go and block themselves.  Much messier
 791                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 792                         # permission anyway, although the code does allow for it.
 793                         # Note: Important to use $target instead of $data['Target']
 794                         # since both $data['PreviousTarget'] and $target are normalized
 795                         # but $data['target'] gets overridden by (non-normalized) request variable
 796                         # from previous request.
 797                         if ( $target === $performer->getName() &&
 798                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 799                         ) {
 800                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 801                         }
 802                 } elseif ( $type == Block::TYPE_RANGE ) {
 803                         $user = null;
 804                         $userId = 0;
 805                 } elseif ( $type == Block::TYPE_IP ) {
 806                         $user = null;
 807                         $target = $target->getName();
 808                         $userId = 0;
 809                 } else {
 810                         # This should have been caught in the form field validation
 811                         return [ 'badipaddress' ];
 812                 }
 813
 814                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 815
 816                 if (
 817                         // an expiry time is needed
 818                         ( strlen( $data['Expiry'] ) == 0 ) ||
 819                         // can't be a larger string as 50 (it should be a time format in any way)
 820                         ( strlen( $data['Expiry'] ) > 50 ) ||
 821                         // check, if the time could be parsed
 822                         !$expiryTime
 823                 ) {
 824                         return [ 'ipb_expiry_invalid' ];
 825                 }
 826
 827                 // an expiry time should be in the future, not in the
 828                 // past (wouldn't make any sense) - bug T123069
 829                 if ( $expiryTime < wfTimestampNow() ) {
 830                         return [ 'ipb_expiry_old' ];
 831                 }
 832
 833                 if ( !isset( $data['DisableEmail'] ) ) {
 834                         $data['DisableEmail'] = false;
 835                 }
 836
 837                 # If the user has done the form 'properly', they won't even have been given the
 838                 # option to suppress-block unless they have the 'hideuser' permission
 839                 if ( !isset( $data['HideUser'] ) ) {
 840                         $data['HideUser'] = false;
 841                 }
 842
 843                 if ( $data['HideUser'] ) {
 844                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 845                                 # this codepath is unreachable except by a malicious user spoofing forms,
 846                                 # or by race conditions (user has hideuser and block rights, loads block form,
 847                                 # and loses hideuser rights before submission); so need to fail completely
 848                                 # rather than just silently disable hiding
 849                                 return [ 'badaccess-group0' ];
 850                         }
 851
 852                         if ( $isPartialBlock ) {
 853                                 return [ 'ipb_hide_partial' ];
 854                         }
 855
 856                         # Recheck params here...
 857                         if ( $type != Block::TYPE_USER ) {
 858                                 $data['HideUser'] = false; # IP users should not be hidden
 859                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 860                                 # Bad expiry.
 861                                 return [ 'ipb_expiry_temp' ];
 862                         } elseif ( $wgHideUserContribLimit !== false
 863                                 && $user->getEditCount() > $wgHideUserContribLimit
 864                         ) {
 865                                 # Typically, the user should have a handful of edits.
 866                                 # Disallow hiding users with many edits for performance.
 867                                 return [ [ 'ipb_hide_invalid',
 868                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 869                         } elseif ( !$data['Confirm'] ) {
 870                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 871                         }
 872                 }
 873
 874                 # Create block object.
 875                 $block = new Block();
 876                 $block->setTarget( $target );
 877                 $block->setBlocker( $performer );
 878                 $block->setReason( $data['Reason'][0] );
 879                 $block->setExpiry( $expiryTime );
 880                 $block->isCreateAccountBlocked( $data['CreateAccount'] );
 881                 $block->isUsertalkEditAllowed( !$wgBlockAllowsUTEdit || !$data['DisableUTEdit'] );
 882                 $block->isEmailBlocked( $data['DisableEmail'] );
 883                 $block->isHardblock( $data['HardBlock'] );
 884                 $block->isAutoblocking( $data['AutoBlock'] );
 885                 $block->setHideName( $data['HideUser'] );
 886
 887                 if ( $isPartialBlock ) {
 888                         $block->isSitewide( false );
 889                 }
 890
 891                 $reason = [ 'hookaborted' ];
 892                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 893                         return $reason;
 894                 }
 895
 896                 $pageRestrictions = [];
 897                 $namespaceRestrictions = [];
 898                 if ( $enablePartialBlocks ) {
 899                         if ( $data['PageRestrictions'] !== '' ) {
 900                                 $pageRestrictions = array_map( function ( $text ) {
 901                                         $title = Title::newFromText( $text );
 902                                         // Use the link cache since the title has already been loaded when
 903                                         // the field was validated.
 904                                         $restriction = new PageRestriction( 0, $title->getArticleID() );
 905                                         $restriction->setTitle( $title );
 906                                         return $restriction;
 907                                 }, explode( "\n", $data['PageRestrictions'] ) );
 908                         }
 909                         if ( $data['NamespaceRestrictions'] !== '' ) {
 910                                 $namespaceRestrictions = array_map( function ( $id ) {
 911                                         return new NamespaceRestriction( 0, $id );
 912                                 }, explode( "\n", $data['NamespaceRestrictions'] ) );
 913                         }
 914
 915                         $restrictions = ( array_merge( $pageRestrictions, $namespaceRestrictions ) );
 916                         $block->setRestrictions( $restrictions );
 917                 }
 918
 919                 $priorBlock = null;
 920                 # Try to insert block. Is there a conflicting block?
 921                 $status = $block->insert();
 922                 if ( !$status ) {
 923                         # Indicates whether the user is confirming the block and is aware of
 924                         # the conflict (did not change the block target in the meantime)
 925                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 926                                 && $data['PreviousTarget'] !== $target );
 927
 928                         # Special case for API - T34434
 929                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 930
 931                         # Show form unless the user is already aware of this...
 932                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 933                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 934                                 # Otherwise, try to update the block...
 935                         } else {
 936                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 937                                 # be sure the user is blocked by now it should work for our purposes
 938                                 $currentBlock = Block::newFromTarget( $target );
 939                                 if ( $block->equals( $currentBlock ) ) {
 940                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 941                                 }
 942                                 # If the name was hidden and the blocking user cannot hide
 943                                 # names, then don't allow any block changes...
 944                                 if ( $currentBlock->getHideName() && !$performer->isAllowed( 'hideuser' ) ) {
 945                                         return [ 'cant-see-hidden-user' ];
 946                                 }
 947
 948                                 $priorBlock = clone $currentBlock;
 949                                 $currentBlock->isHardblock( $block->isHardblock() );
 950                                 $currentBlock->isCreateAccountBlocked( $block->isCreateAccountBlocked() );
 951                                 $currentBlock->setExpiry( $block->getExpiry() );
 952                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 953                                 $currentBlock->setHideName( $block->getHideName() );
 954                                 $currentBlock->isEmailBlocked( $block->isEmailBlocked() );
 955                                 $currentBlock->isUsertalkEditAllowed( $block->isUsertalkEditAllowed() );
 956                                 $currentBlock->setReason( $block->getReason() );
 957
 958                                 if ( $enablePartialBlocks ) {
 959                                         // Maintain the sitewide status. If partial blocks is not enabled,
 960                                         // saving the block will result in a sitewide block.
 961                                         $currentBlock->isSitewide( $block->isSitewide() );
 962
 963                                         // Set the block id of the restrictions.
 964                                         $currentBlock->setRestrictions(
 965                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 966                                         );
 967                                 }
 968
 969                                 $status = $currentBlock->update();
 970                                 // TODO handle failure
 971
 972                                 $logaction = 'reblock';
 973
 974                                 # Unset _deleted fields if requested
 975                                 if ( $currentBlock->getHideName() && !$data['HideUser'] ) {
 976                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 977                                 }
 978
 979                                 # If hiding/unhiding a name, this should go in the private logs
 980                                 if ( (bool)$currentBlock->getHideName() ) {
 981                                         $data['HideUser'] = true;
 982                                 }
 983
 984                                 $block = $currentBlock;
 985                         }
 986                 } else {
 987                         $logaction = 'block';
 988                 }
 989
 990                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 991
 992                 # Set *_deleted fields if requested
 993                 if ( $data['HideUser'] ) {
 994                         RevisionDeleteUser::suppressUserName( $target, $userId );
 995                 }
 996
 997                 # Can't watch a rangeblock
 998                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 999                         WatchAction::doWatch(
1000                                 Title::makeTitle( NS_USER, $target ),
1001                                 $performer,
1002                                 User::IGNORE_USER_RIGHTS
1003                         );
1004                 }
1005
1006                 # Block constructor sanitizes certain block options on insert
1007                 $data['BlockEmail'] = $block->isEmailBlocked();
1008                 $data['AutoBlock'] = $block->isAutoblocking();
1009
1010                 # Prepare log parameters
1011                 $logParams = [];
1012                 $logParams['5::duration'] = $data['Expiry'];
1013                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
1014                 $logParams['sitewide'] = $block->isSitewide();
1015
1016                 if ( $enablePartialBlocks && !$block->isSitewide() ) {
1017                         if ( $data['PageRestrictions'] !== '' ) {
1018                                 $logParams['7::restrictions']['pages'] = explode( "\n", $data['PageRestrictions'] );
1019                         }
1020
1021                         if ( $data['NamespaceRestrictions'] !== '' ) {
1022                                 $logParams['7::restrictions']['namespaces'] = explode( "\n", $data['NamespaceRestrictions'] );
1023                         }
1024                 }
1025
1026                 # Make log entry, if the name is hidden, put it in the suppression log
1027                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
1028                 $logEntry = new ManualLogEntry( $log_type, $logaction );
1029                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
1030                 $logEntry->setComment( $data['Reason'][0] );
1031                 $logEntry->setPerformer( $performer );
1032                 $logEntry->setParameters( $logParams );
1033                 # Relate log ID to block ID (T27763)
1034                 $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
1035                 $logId = $logEntry->insert();
1036
1037                 if ( !empty( $data['Tags'] ) ) {
1038                         $logEntry->setTags( $data['Tags'] );
1039                 }
1040
1041                 $logEntry->publish( $logId );
1042
1043                 return true;
1044         }
1045
1046         /**
1047          * Get an array of suggested block durations from MediaWiki:Ipboptions
1048          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
1049          *     to the standard "**<duration>|<displayname>" format?
1050          * @param Language|null $lang The language to get the durations in, or null to use
1051          *     the wiki's content language
1052          * @param bool $includeOther Whether to include the 'other' option in the list of
1053          *     suggestions
1054          * @return array
1055          */
1056         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
1057                 $a = [];
1058                 $msg = $lang === null
1059                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
1060                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
1061
1062                 if ( $msg == '-' ) {
1063                         return [];
1064                 }
1065
1066                 foreach ( explode( ',', $msg ) as $option ) {
1067                         if ( strpos( $option, ':' ) === false ) {
1068                                 $option = "$option:$option";
1069                         }
1070
1071                         list( $show, $value ) = explode( ':', $option );
1072                         $a[$show] = $value;
1073                 }
1074
1075                 if ( $a && $includeOther ) {
1076                         // if options exist, add other to the end instead of the begining (which
1077                         // is what happens by default).
1078                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
1079                 }
1080
1081                 return $a;
1082         }
1083
1084         /**
1085          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
1086          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
1087          *
1088          * @todo strtotime() only accepts English strings. This means the expiry input
1089          *       can only be specified in English.
1090          * @see https://secure.php.net/manual/en/function.strtotime.php
1091          *
1092          * @param string $expiry Whatever was typed into the form
1093          * @return string|bool Timestamp or 'infinity' or false on error.
1094          */
1095         public static function parseExpiryInput( $expiry ) {
1096                 if ( wfIsInfinity( $expiry ) ) {
1097                         return 'infinity';
1098                 }
1099
1100                 $expiry = strtotime( $expiry );
1101
1102                 if ( $expiry < 0 || $expiry === false ) {
1103                         return false;
1104                 }
1105
1106                 return wfTimestamp( TS_MW, $expiry );
1107         }
1108
1109         /**
1110          * Can we do an email block?
1111          * @param User $user The sysop wanting to make a block
1112          * @return bool
1113          */
1114         public static function canBlockEmail( $user ) {
1115                 global $wgEnableUserEmail, $wgSysopEmailBans;
1116
1117                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1118         }
1119
1120         /**
1121          * T17810: blocked admins should not be able to block/unblock
1122          * others, and probably shouldn't be able to unblock themselves
1123          * either.
1124          *
1125          * Exception: Users can block the user who blocked them, to reduce
1126          * advantage of a malicious account blocking all admins (T150826)
1127          *
1128          * @param User|int|string|null $target Target to block or unblock; could be a User object,
1129          *   or a user ID or username, or null when the target is not known yet (e.g. when
1130          *   displaying Special:Block)
1131          * @param User $performer User doing the request
1132          * @return bool|string True or error message key
1133          */
1134         public static function checkUnblockSelf( $target, User $performer ) {
1135                 if ( is_int( $target ) ) {
1136                         $target = User::newFromId( $target );
1137                 } elseif ( is_string( $target ) ) {
1138                         $target = User::newFromName( $target );
1139                 }
1140                 if ( $performer->isBlocked() ) {
1141                         if ( $target instanceof User && $target->getId() == $performer->getId() ) {
1142                                 # User is trying to unblock themselves
1143                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1144                                         return true;
1145                                         # User blocked themselves and is now trying to reverse it
1146                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1147                                         return true;
1148                                 } else {
1149                                         return 'ipbnounblockself';
1150                                 }
1151                         } elseif (
1152                                 $target instanceof User &&
1153                                 $performer->getBlock() instanceof Block &&
1154                                 $performer->getBlock()->getBy() &&
1155                                 $performer->getBlock()->getBy() === $target->getId()
1156                         ) {
1157                                 // Allow users to block the user that blocked them.
1158                                 // This is to prevent a situation where a malicious user
1159                                 // blocks all other users. This way, the non-malicious
1160                                 // user can block the malicious user back, resulting
1161                                 // in a stalemate.
1162                                 return true;
1163
1164                         } else {
1165                                 # User is trying to block/unblock someone else
1166                                 return 'ipbblocked';
1167                         }
1168                 } else {
1169                         return true;
1170                 }
1171         }
1172
1173         /**
1174          * Return a comma-delimited list of "flags" to be passed to the log
1175          * reader for this block, to provide more information in the logs
1176          * @param array $data From HTMLForm data
1177          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1178          * @return string
1179          */
1180         protected static function blockLogFlags( array $data, $type ) {
1181                 $config = RequestContext::getMain()->getConfig();
1182
1183                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1184
1185                 $flags = [];
1186
1187                 # when blocking a user the option 'anononly' is not available/has no effect
1188                 # -> do not write this into log
1189                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1190                         // For grepping: message block-log-flags-anononly
1191                         $flags[] = 'anononly';
1192                 }
1193
1194                 if ( $data['CreateAccount'] ) {
1195                         // For grepping: message block-log-flags-nocreate
1196                         $flags[] = 'nocreate';
1197                 }
1198
1199                 # Same as anononly, this is not displayed when blocking an IP address
1200                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1201                         // For grepping: message block-log-flags-noautoblock
1202                         $flags[] = 'noautoblock';
1203                 }
1204
1205                 if ( $data['DisableEmail'] ) {
1206                         // For grepping: message block-log-flags-noemail
1207                         $flags[] = 'noemail';
1208                 }
1209
1210                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1211                         // For grepping: message block-log-flags-nousertalk
1212                         $flags[] = 'nousertalk';
1213                 }
1214
1215                 if ( $data['HideUser'] ) {
1216                         // For grepping: message block-log-flags-hiddenname
1217                         $flags[] = 'hiddenname';
1218                 }
1219
1220                 return implode( ',', $flags );
1221         }
1222
1223         /**
1224          * Process the form on POST submission.
1225          * @param array $data
1226          * @param HTMLForm|null $form
1227          * @return bool|array True for success, false for didn't-try, array of errors on failure
1228          */
1229         public function onSubmit( array $data, HTMLForm $form = null ) {
1230                 // If "Editing" checkbox is unchecked, the block must be a partial block affecting
1231                 // actions other than editing, and there must be no restrictions.
1232                 if ( isset( $data['Editing'] ) && $data['Editing'] === false ) {
1233                         $data['EditingRestriction'] = 'partial';
1234                         $data['PageRestrictions'] = '';
1235                         $data['NamespaceRestrictions'] = '';
1236                 }
1237                 return self::processForm( $data, $form->getContext() );
1238         }
1239
1240         /**
1241          * Do something exciting on successful processing of the form, most likely to show a
1242          * confirmation message
1243          */
1244         public function onSuccess() {
1245                 $out = $this->getOutput();
1246                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1247                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1248         }
1249
1250         /**
1251          * Return an array of subpages beginning with $search that this special page will accept.
1252          *
1253          * @param string $search Prefix to search for
1254          * @param int $limit Maximum number of results to return (usually 10)
1255          * @param int $offset Number of results to skip (usually 0)
1256          * @return string[] Matching subpages
1257          */
1258         public function prefixSearchSubpages( $search, $limit, $offset ) {
1259                 $user = User::newFromName( $search );
1260                 if ( !$user ) {
1261                         // No prefix suggestion for invalid user
1262                         return [];
1263                 }
1264                 // Autocomplete subpage as user list - public to allow caching
1265                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1266         }
1267
1268         protected function getGroupName() {
1269                 return 'users';
1270         }
1271 }