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