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 use MediaWiki\User\UserIdentity;
  29
  30 /**
  31  * A special page that allows users with 'block' right to block users from
  32  * editing pages and other actions
  33  *
  34  * @ingroup SpecialPage
  35  */
  36 class SpecialBlock extends FormSpecialPage {
  37         /** @var User|string|null User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  38          * or as subpage (Special:Block/Foo)
  39          */
  40         protected $target;
  41
  42         /** @var int DatabaseBlock::TYPE_ constant */
  43         protected $type;
  44
  45         /** @var User|string The previous block target */
  46         protected $previousTarget;
  47
  48         /** @var bool Whether the previous submission of the form asked for HideUser */
  49         protected $requestedHideUser;
  50
  51         /** @var bool */
  52         protected $alreadyBlocked;
  53
  54         /** @var array */
  55         protected $preErrors = [];
  56
  57         public function __construct() {
  58                 parent::__construct( 'Block', 'block' );
  59         }
  60
  61         public function doesWrites() {
  62                 return true;
  63         }
  64
  65         /**
  66          * Checks that the user can unblock themselves if they are trying to do so
  67          *
  68          * @param User $user
  69          * @throws ErrorPageError
  70          */
  71         protected function checkExecutePermissions( User $user ) {
  72                 parent::checkExecutePermissions( $user );
  73                 # T17810: blocked admins should have limited access here
  74                 $status = self::checkUnblockSelf( $this->target, $user );
  75                 if ( $status !== true ) {
  76                         throw new ErrorPageError( 'badaccess', $status );
  77                 }
  78         }
  79
  80         /**
  81          * We allow certain special cases where user is blocked
  82          *
  83          * @return bool
  84          */
  85         public function requiresUnblock() {
  86                 return false;
  87         }
  88
  89         /**
  90          * Handle some magic here
  91          *
  92          * @param string $par
  93          */
  94         protected function setParameter( $par ) {
  95                 # Extract variables from the request.  Try not to get into a situation where we
  96                 # need to extract *every* variable from the form just for processing here, but
  97                 # there are legitimate uses for some variables
  98                 $request = $this->getRequest();
  99                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
 100                 if ( $this->target instanceof User ) {
 101                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
 102                         # User logs, UserRights, etc.
 103                         $this->getSkin()->setRelevantUser( $this->target );
 104                 }
 105
 106                 list( $this->previousTarget, /*...*/ ) =
 107                         DatabaseBlock::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
 108                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
 109         }
 110
 111         /**
 112          * Customizes the HTMLForm a bit
 113          *
 114          * @param HTMLForm $form
 115          */
 116         protected function alterForm( HTMLForm $form ) {
 117                 $form->setHeaderText( '' );
 118                 $form->setSubmitDestructive();
 119
 120                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 121                 $form->setSubmitTextMsg( $msg );
 122
 123                 $this->addHelpLink( 'Help:Blocking users' );
 124
 125                 # Don't need to do anything if the form has been posted
 126                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 127                         $s = $form->formatErrors( $this->preErrors );
 128                         if ( $s ) {
 129                                 $form->addHeaderText( Html::rawElement(
 130                                         'div',
 131                                         [ 'class' => 'error' ],
 132                                         $s
 133                                 ) );
 134                         }
 135                 }
 136         }
 137
 138         protected function getDisplayFormat() {
 139                 return 'ooui';
 140         }
 141
 142         /**
 143          * Get the HTMLForm descriptor array for the block form
 144          * @return array
 145          */
 146         protected function getFormFields() {
 147                 $conf = $this->getConfig();
 148                 $enablePartialBlocks = $conf->get( 'EnablePartialBlocks' );
 149                 $blockAllowsUTEdit = $conf->get( 'BlockAllowsUTEdit' );
 150
 151                 $this->getOutput()->enableOOUI();
 152
 153                 $user = $this->getUser();
 154
 155                 $suggestedDurations = self::getSuggestedDurations();
 156
 157                 $a = [];
 158
 159                 $a['Target'] = [
 160                         'type' => 'user',
 161                         'ipallowed' => true,
 162                         'iprange' => true,
 163                         'id' => 'mw-bi-target',
 164                         'size' => '45',
 165                         'autofocus' => true,
 166                         'required' => true,
 167                         'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 168                         'section' => 'target',
 169                 ];
 170
 171                 $a['Editing'] = [
 172                         'type' => 'check',
 173                         'label-message' => 'block-prevent-edit',
 174                         'default' => true,
 175                         'section' => 'actions',
 176                         'disabled' => $enablePartialBlocks ? false : true,
 177                 ];
 178
 179                 if ( $enablePartialBlocks ) {
 180                         $a['EditingRestriction'] = [
 181                                 'type' => 'radio',
 182                                 'cssclass' => 'mw-block-editing-restriction',
 183                                 'options' => [
 184                                         $this->msg( 'ipb-sitewide' )->escaped() .
 185                                                 new \OOUI\LabelWidget( [
 186                                                         'classes' => [ 'oo-ui-inline-help' ],
 187                                                         'label' => $this->msg( 'ipb-sitewide-help' )->text(),
 188                                                 ] ) => 'sitewide',
 189                                         $this->msg( 'ipb-partial' )->escaped() .
 190                                                 new \OOUI\LabelWidget( [
 191                                                         'classes' => [ 'oo-ui-inline-help' ],
 192                                                         'label' => $this->msg( 'ipb-partial-help' )->text(),
 193                                                 ] ) => 'partial',
 194                                 ],
 195                                 'section' => 'actions',
 196                         ];
 197                         $a['PageRestrictions'] = [
 198                                 'type' => 'titlesmultiselect',
 199                                 'label' => $this->msg( 'ipb-pages-label' )->text(),
 200                                 'exists' => true,
 201                                 'max' => 10,
 202                                 'cssclass' => 'mw-block-restriction',
 203                                 'showMissing' => false,
 204                                 'excludeDynamicNamespaces' => true,
 205                                 'input' => [
 206                                         'autocomplete' => false
 207                                 ],
 208                                 'section' => 'actions',
 209                         ];
 210                         $a['NamespaceRestrictions'] = [
 211                                 'type' => 'namespacesmultiselect',
 212                                 'label' => $this->msg( 'ipb-namespaces-label' )->text(),
 213                                 'exists' => true,
 214                                 'cssclass' => 'mw-block-restriction',
 215                                 'input' => [
 216                                         'autocomplete' => false
 217                                 ],
 218                                 'section' => 'actions',
 219                         ];
 220                 }
 221
 222                 $a['CreateAccount'] = [
 223                         'type' => 'check',
 224                         'label-message' => 'ipbcreateaccount',
 225                         'default' => true,
 226                         'section' => 'actions',
 227                 ];
 228
 229                 if ( self::canBlockEmail( $user ) ) {
 230                         $a['DisableEmail'] = [
 231                                 'type' => 'check',
 232                                 'label-message' => 'ipbemailban',
 233                                 'section' => 'actions',
 234                         ];
 235                 }
 236
 237                 if ( $blockAllowsUTEdit ) {
 238                         $a['DisableUTEdit'] = [
 239                                 'type' => 'check',
 240                                 'label-message' => 'ipb-disableusertalk',
 241                                 'default' => false,
 242                                 'section' => 'actions',
 243                         ];
 244                 }
 245
 246                 $a['Expiry'] = [
 247                         'type' => 'expiry',
 248                         'required' => true,
 249                         'options' => $suggestedDurations,
 250                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 251                         'section' => 'expiry',
 252                 ];
 253
 254                 $a['Reason'] = [
 255                         'type' => 'selectandother',
 256                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 257                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 258                         // Unicode codepoints.
 259                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 260                         'maxlength-unit' => 'codepoints',
 261                         'options-message' => 'ipbreason-dropdown',
 262                         'section' => 'reason',
 263                 ];
 264
 265                 $a['AutoBlock'] = [
 266                         'type' => 'check',
 267                         'label-message' => 'ipbenableautoblock',
 268                         'default' => true,
 269                         'section' => 'options',
 270                 ];
 271
 272                 # Allow some users to hide name from block log, blocklist and listusers
 273                 if ( MediaWikiServices::getInstance()
 274                         ->getPermissionManager()
 275                         ->userHasRight( $user, 'hideuser' )
 276                 ) {
 277                         $a['HideUser'] = [
 278                                 'type' => 'check',
 279                                 'label-message' => 'ipbhidename',
 280                                 'cssclass' => 'mw-block-hideuser',
 281                                 'section' => 'options',
 282                         ];
 283                 }
 284
 285                 # Watchlist their user page? (Only if user is logged in)
 286                 if ( $user->isLoggedIn() ) {
 287                         $a['Watch'] = [
 288                                 'type' => 'check',
 289                                 'label-message' => 'ipbwatchuser',
 290                                 'section' => 'options',
 291                         ];
 292                 }
 293
 294                 $a['HardBlock'] = [
 295                         'type' => 'check',
 296                         'label-message' => 'ipb-hardblock',
 297                         'default' => false,
 298                         'section' => 'options',
 299                 ];
 300
 301                 # This is basically a copy of the Target field, but the user can't change it, so we
 302                 # can see if the warnings we maybe showed to the user before still apply
 303                 $a['PreviousTarget'] = [
 304                         'type' => 'hidden',
 305                         'default' => false,
 306                 ];
 307
 308                 # We'll turn this into a checkbox if we need to
 309                 $a['Confirm'] = [
 310                         'type' => 'hidden',
 311                         'default' => '',
 312                         'label-message' => 'ipb-confirm',
 313                         'cssclass' => 'mw-block-confirm',
 314                 ];
 315
 316                 $this->maybeAlterFormDefaults( $a );
 317
 318                 // Allow extensions to add more fields
 319                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 320
 321                 return $a;
 322         }
 323
 324         /**
 325          * If the user has already been blocked with similar settings, load that block
 326          * and change the defaults for the form fields to match the existing settings.
 327          * @param array &$fields HTMLForm descriptor array
 328          */
 329         protected function maybeAlterFormDefaults( &$fields ) {
 330                 # This will be overwritten by request data
 331                 $fields['Target']['default'] = (string)$this->target;
 332
 333                 if ( $this->target ) {
 334                         $status = self::validateTarget( $this->target, $this->getUser() );
 335                         if ( !$status->isOK() ) {
 336                                 $errors = $status->getErrorsArray();
 337                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 338                         }
 339                 }
 340
 341                 # This won't be
 342                 $fields['PreviousTarget']['default'] = (string)$this->target;
 343
 344                 $block = DatabaseBlock::newFromTarget( $this->target );
 345
 346                 // Populate fields if there is a block that is not an autoblock; if it is a range
 347                 // block, only populate the fields if the range is the same as $this->target
 348                 if ( $block instanceof DatabaseBlock && $block->getType() !== DatabaseBlock::TYPE_AUTO
 349                         && ( $this->type != DatabaseBlock::TYPE_RANGE
 350                                 || $block->getTarget() == $this->target )
 351                 ) {
 352                         $fields['HardBlock']['default'] = $block->isHardblock();
 353                         $fields['CreateAccount']['default'] = $block->isCreateAccountBlocked();
 354                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 355
 356                         if ( isset( $fields['DisableEmail'] ) ) {
 357                                 $fields['DisableEmail']['default'] = $block->isEmailBlocked();
 358                         }
 359
 360                         if ( isset( $fields['HideUser'] ) ) {
 361                                 $fields['HideUser']['default'] = $block->getHideName();
 362                         }
 363
 364                         if ( isset( $fields['DisableUTEdit'] ) ) {
 365                                 $fields['DisableUTEdit']['default'] = !$block->isUsertalkEditAllowed();
 366                         }
 367
 368                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 369                         // unless this user also has rights to hideuser: T37839
 370                         if ( !$block->getHideName() || MediaWikiServices::getInstance()
 371                                         ->getPermissionManager()
 372                                         ->userHasRight( $this->getUser(), 'hideuser' )
 373                         ) {
 374                                 $fields['Reason']['default'] = $block->getReason();
 375                         } else {
 376                                 $fields['Reason']['default'] = '';
 377                         }
 378
 379                         if ( $this->getRequest()->wasPosted() ) {
 380                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 381                                 # confirm checkbox; the user will only see it if they haven't previously
 382                                 $fields['Confirm']['type'] = 'check';
 383                         } else {
 384                                 # We got a target, but it wasn't a POST request, so the user must have gone
 385                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 386                                 # as long as they go ahead and block *that* user
 387                                 $fields['Confirm']['default'] = 1;
 388                         }
 389
 390                         if ( $block->getExpiry() == 'infinity' ) {
 391                                 $fields['Expiry']['default'] = 'infinite';
 392                         } else {
 393                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->getExpiry() );
 394                         }
 395
 396                         $this->alreadyBlocked = true;
 397                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 398                 }
 399
 400                 if ( $this->alreadyBlocked || $this->getRequest()->wasPosted()
 401                         || $this->getRequest()->getCheck( 'wpCreateAccount' )
 402                 ) {
 403                         $this->getOutput()->addJsConfigVars( 'wgCreateAccountDirty', true );
 404                 }
 405
 406                 # We always need confirmation to do HideUser
 407                 if ( $this->requestedHideUser ) {
 408                         $fields['Confirm']['type'] = 'check';
 409                         unset( $fields['Confirm']['default'] );
 410                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 411                 }
 412
 413                 # Or if the user is trying to block themselves
 414                 if ( (string)$this->target === $this->getUser()->getName() ) {
 415                         $fields['Confirm']['type'] = 'check';
 416                         unset( $fields['Confirm']['default'] );
 417                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 418                 }
 419
 420                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 421                         if ( $block instanceof DatabaseBlock && !$block->isSitewide() ) {
 422                                 $fields['EditingRestriction']['default'] = 'partial';
 423                         } else {
 424                                 $fields['EditingRestriction']['default'] = 'sitewide';
 425                         }
 426
 427                         if ( $block instanceof DatabaseBlock ) {
 428                                 $pageRestrictions = [];
 429                                 $namespaceRestrictions = [];
 430                                 foreach ( $block->getRestrictions() as $restriction ) {
 431                                         switch ( $restriction->getType() ) {
 432                                                 case PageRestriction::TYPE:
 433                                                         /** @var PageRestriction $restriction */
 434                                                         '@phan-var PageRestriction $restriction';
 435                                                         if ( $restriction->getTitle() ) {
 436                                                                 $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 437                                                         }
 438                                                         break;
 439                                                 case NamespaceRestriction::TYPE:
 440                                                         $namespaceRestrictions[] = $restriction->getValue();
 441                                                         break;
 442                                         }
 443                                 }
 444
 445                                 if (
 446                                         !$block->isSitewide() &&
 447                                         empty( $pageRestrictions ) &&
 448                                         empty( $namespaceRestrictions )
 449                                 ) {
 450                                         $fields['Editing']['default'] = false;
 451                                 }
 452
 453                                 // Sort the restrictions so they are in alphabetical order.
 454                                 sort( $pageRestrictions );
 455                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 456                                 sort( $namespaceRestrictions );
 457                                 $fields['NamespaceRestrictions']['default'] = implode( "\n", $namespaceRestrictions );
 458                         }
 459                 }
 460         }
 461
 462         /**
 463          * Add header elements like block log entries, etc.
 464          * @return string
 465          */
 466         protected function preText() {
 467                 $this->getOutput()->addModuleStyles( [
 468                         'mediawiki.widgets.TagMultiselectWidget.styles',
 469                         'mediawiki.special',
 470                 ] );
 471                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 472
 473                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 474                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 475
 476                 $otherBlockMessages = [];
 477                 if ( $this->target !== null ) {
 478                         $targetName = $this->target;
 479                         if ( $this->target instanceof User ) {
 480                                 $targetName = $this->target->getName();
 481                         }
 482                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 483                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 484
 485                         if ( count( $otherBlockMessages ) ) {
 486                                 $s = Html::rawElement(
 487                                         'h2',
 488                                         [],
 489                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 490                                 ) . "\n";
 491
 492                                 $list = '';
 493
 494                                 foreach ( $otherBlockMessages as $link ) {
 495                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 496                                 }
 497
 498                                 $s .= Html::rawElement(
 499                                         'ul',
 500                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 501                                         $list
 502                                 ) . "\n";
 503
 504                                 $text .= $s;
 505                         }
 506                 }
 507
 508                 return $text;
 509         }
 510
 511         /**
 512          * Add footer elements to the form
 513          * @return string
 514          */
 515         protected function postText() {
 516                 $links = [];
 517
 518                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 519
 520                 $linkRenderer = $this->getLinkRenderer();
 521                 # Link to the user's contributions, if applicable
 522                 if ( $this->target instanceof User ) {
 523                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 524                         $links[] = $linkRenderer->makeLink(
 525                                 $contribsPage,
 526                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 527                         );
 528                 }
 529
 530                 # Link to unblock the specified user, or to a blank unblock form
 531                 if ( $this->target instanceof User ) {
 532                         $message = $this->msg(
 533                                 'ipb-unblock-addr',
 534                                 wfEscapeWikiText( $this->target->getName() )
 535                         )->parse();
 536                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 537                 } else {
 538                         $message = $this->msg( 'ipb-unblock' )->parse();
 539                         $list = SpecialPage::getTitleFor( 'Unblock' );
 540                 }
 541                 $links[] = $linkRenderer->makeKnownLink(
 542                         $list,
 543                         new HtmlArmor( $message )
 544                 );
 545
 546                 # Link to the block list
 547                 $links[] = $linkRenderer->makeKnownLink(
 548                         SpecialPage::getTitleFor( 'BlockList' ),
 549                         $this->msg( 'ipb-blocklist' )->text()
 550                 );
 551
 552                 $user = $this->getUser();
 553
 554                 # Link to edit the block dropdown reasons, if applicable
 555                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 556                 if ( $permissionManager->userHasRight( $user, 'editinterface' ) ) {
 557                         $links[] = $linkRenderer->makeKnownLink(
 558                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 559                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 560                                 [],
 561                                 [ 'action' => 'edit' ]
 562                         );
 563                 }
 564
 565                 $text = Html::rawElement(
 566                         'p',
 567                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 568                         $this->getLanguage()->pipeList( $links )
 569                 );
 570
 571                 $userTitle = self::getTargetUserTitle( $this->target );
 572                 if ( $userTitle ) {
 573                         # Get relevant extracts from the block and suppression logs, if possible
 574                         $out = '';
 575
 576                         LogEventsList::showLogExtract(
 577                                 $out,
 578                                 'block',
 579                                 $userTitle,
 580                                 '',
 581                                 [
 582                                         'lim' => 10,
 583                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 584                                         'showIfEmpty' => false
 585                                 ]
 586                         );
 587                         $text .= $out;
 588
 589                         # Add suppression block entries if allowed
 590                         if ( $permissionManager->userHasRight( $user, 'suppressionlog' ) ) {
 591                                 LogEventsList::showLogExtract(
 592                                         $out,
 593                                         'suppress',
 594                                         $userTitle,
 595                                         '',
 596                                         [
 597                                                 'lim' => 10,
 598                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 599                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 600                                                 'showIfEmpty' => false
 601                                         ]
 602                                 );
 603
 604                                 $text .= $out;
 605                         }
 606                 }
 607
 608                 return $text;
 609         }
 610
 611         /**
 612          * Get a user page target for things like logs.
 613          * This handles account and IP range targets.
 614          * @param User|string $target
 615          * @return Title|null
 616          */
 617         protected static function getTargetUserTitle( $target ) {
 618                 if ( $target instanceof User ) {
 619                         return $target->getUserPage();
 620                 } elseif ( IP::isIPAddress( $target ) ) {
 621                         return Title::makeTitleSafe( NS_USER, $target );
 622                 }
 623
 624                 return null;
 625         }
 626
 627         /**
 628          * Determine the target of the block, and the type of target
 629          * @todo Should be in DatabaseBlock.php?
 630          * @param string $par Subpage parameter passed to setup, or data value from
 631          *     the HTMLForm
 632          * @param WebRequest|null $request Optionally try and get data from a request too
 633          * @return array [ User|string|null, DatabaseBlock::TYPE_ constant|null ]
 634          * @phan-return array{0:User|string|null,1:int|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 ) = DatabaseBlock::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 == DatabaseBlock::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 == DatabaseBlock::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 == DatabaseBlock::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|array
 766          */
 767         public static function processForm( array $data, IContextSource $context ) {
 768                 $performer = $context->getUser();
 769                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 770                 $isPartialBlock = $enablePartialBlocks &&
 771                         isset( $data['EditingRestriction'] ) &&
 772                         $data['EditingRestriction'] === 'partial';
 773
 774                 # This might have been a hidden field or a checkbox, so interesting data
 775                 # can come from it
 776                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 777
 778                 /** @var User $target */
 779                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 780                 if ( $type == DatabaseBlock::TYPE_USER ) {
 781                         $user = $target;
 782                         $target = $user->getName();
 783                         $userId = $user->getId();
 784
 785                         # Give admins a heads-up before they go and block themselves.  Much messier
 786                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 787                         # permission anyway, although the code does allow for it.
 788                         # Note: Important to use $target instead of $data['Target']
 789                         # since both $data['PreviousTarget'] and $target are normalized
 790                         # but $data['target'] gets overridden by (non-normalized) request variable
 791                         # from previous request.
 792                         if ( $target === $performer->getName() &&
 793                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 794                         ) {
 795                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 796                         }
 797                 } elseif ( $type == DatabaseBlock::TYPE_RANGE ) {
 798                         $user = null;
 799                         $userId = 0;
 800                 } elseif ( $type == DatabaseBlock::TYPE_IP ) {
 801                         $user = null;
 802                         $target = $target->getName();
 803                         $userId = 0;
 804                 } else {
 805                         # This should have been caught in the form field validation
 806                         return [ 'badipaddress' ];
 807                 }
 808
 809                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 810
 811                 if (
 812                         // an expiry time is needed
 813                         ( strlen( $data['Expiry'] ) == 0 ) ||
 814                         // can't be a larger string as 50 (it should be a time format in any way)
 815                         ( strlen( $data['Expiry'] ) > 50 ) ||
 816                         // check, if the time could be parsed
 817                         !$expiryTime
 818                 ) {
 819                         return [ 'ipb_expiry_invalid' ];
 820                 }
 821
 822                 // an expiry time should be in the future, not in the
 823                 // past (wouldn't make any sense) - bug T123069
 824                 if ( $expiryTime < wfTimestampNow() ) {
 825                         return [ 'ipb_expiry_old' ];
 826                 }
 827
 828                 if ( !isset( $data['DisableEmail'] ) ) {
 829                         $data['DisableEmail'] = false;
 830                 }
 831
 832                 # If the user has done the form 'properly', they won't even have been given the
 833                 # option to suppress-block unless they have the 'hideuser' permission
 834                 if ( !isset( $data['HideUser'] ) ) {
 835                         $data['HideUser'] = false;
 836                 }
 837
 838                 if ( $data['HideUser'] ) {
 839                         if ( !MediaWikiServices::getInstance()
 840                                 ->getPermissionManager()
 841                                 ->userHasRight( $performer, 'hideuser' )
 842                         ) {
 843                                 # this codepath is unreachable except by a malicious user spoofing forms,
 844                                 # or by race conditions (user has hideuser and block rights, loads block form,
 845                                 # and loses hideuser rights before submission); so need to fail completely
 846                                 # rather than just silently disable hiding
 847                                 return [ 'badaccess-group0' ];
 848                         }
 849
 850                         if ( $isPartialBlock ) {
 851                                 return [ 'ipb_hide_partial' ];
 852                         }
 853
 854                         # Recheck params here...
 855                         $hideUserContribLimit = $context->getConfig()->get( 'HideUserContribLimit' );
 856                         if ( $type != DatabaseBlock::TYPE_USER ) {
 857                                 $data['HideUser'] = false; # IP users should not be hidden
 858                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 859                                 # Bad expiry.
 860                                 return [ 'ipb_expiry_temp' ];
 861                         } elseif ( $hideUserContribLimit !== false
 862                                 && $user->getEditCount() > $hideUserContribLimit
 863                         ) {
 864                                 # Typically, the user should have a handful of edits.
 865                                 # Disallow hiding users with many edits for performance.
 866                                 return [ [ 'ipb_hide_invalid',
 867                                         Message::numParam( $hideUserContribLimit ) ] ];
 868                         } elseif ( !$data['Confirm'] ) {
 869                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 870                         }
 871                 }
 872
 873                 $blockAllowsUTEdit = $context->getConfig()->get( 'BlockAllowsUTEdit' );
 874                 $userTalkEditAllowed = !$blockAllowsUTEdit || !$data['DisableUTEdit'];
 875                 if ( !$userTalkEditAllowed &&
 876                         $isPartialBlock &&
 877                         !in_array( NS_USER_TALK, explode( "\n", $data['NamespaceRestrictions'] ) )
 878                 ) {
 879                         return [ 'ipb-prevent-user-talk-edit' ];
 880                 }
 881
 882                 # Create block object.
 883                 $block = new DatabaseBlock();
 884                 $block->setTarget( $target );
 885                 $block->setBlocker( $performer );
 886                 $block->setReason( $data['Reason'][0] );
 887                 $block->setExpiry( $expiryTime );
 888                 $block->isCreateAccountBlocked( $data['CreateAccount'] );
 889                 $block->isUsertalkEditAllowed( $userTalkEditAllowed );
 890                 $block->isEmailBlocked( $data['DisableEmail'] );
 891                 $block->isHardblock( $data['HardBlock'] );
 892                 $block->isAutoblocking( $data['AutoBlock'] );
 893                 $block->setHideName( $data['HideUser'] );
 894
 895                 if ( $isPartialBlock ) {
 896                         $block->isSitewide( false );
 897                 }
 898
 899                 $reason = [ 'hookaborted' ];
 900                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 901                         return $reason;
 902                 }
 903
 904                 $pageRestrictions = [];
 905                 $namespaceRestrictions = [];
 906                 if ( $enablePartialBlocks ) {
 907                         if ( $data['PageRestrictions'] !== '' ) {
 908                                 $pageRestrictions = array_map( function ( $text ) {
 909                                         $title = Title::newFromText( $text );
 910                                         // Use the link cache since the title has already been loaded when
 911                                         // the field was validated.
 912                                         $restriction = new PageRestriction( 0, $title->getArticleID() );
 913                                         $restriction->setTitle( $title );
 914                                         return $restriction;
 915                                 }, explode( "\n", $data['PageRestrictions'] ) );
 916                         }
 917                         if ( $data['NamespaceRestrictions'] !== '' ) {
 918                                 $namespaceRestrictions = array_map( function ( $id ) {
 919                                         return new NamespaceRestriction( 0, $id );
 920                                 }, explode( "\n", $data['NamespaceRestrictions'] ) );
 921                         }
 922
 923                         $restrictions = ( array_merge( $pageRestrictions, $namespaceRestrictions ) );
 924                         $block->setRestrictions( $restrictions );
 925                 }
 926
 927                 $priorBlock = null;
 928                 # Try to insert block. Is there a conflicting block?
 929                 $status = $block->insert();
 930                 if ( !$status ) {
 931                         # Indicates whether the user is confirming the block and is aware of
 932                         # the conflict (did not change the block target in the meantime)
 933                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 934                                 && $data['PreviousTarget'] !== $target );
 935
 936                         # Special case for API - T34434
 937                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 938
 939                         # Show form unless the user is already aware of this...
 940                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 941                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 942                                 # Otherwise, try to update the block...
 943                         } else {
 944                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 945                                 # be sure the user is blocked by now it should work for our purposes
 946                                 $currentBlock = DatabaseBlock::newFromTarget( $target );
 947                                 if ( $block->equals( $currentBlock ) ) {
 948                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 949                                 }
 950                                 # If the name was hidden and the blocking user cannot hide
 951                                 # names, then don't allow any block changes...
 952                                 if ( $currentBlock->getHideName() && !MediaWikiServices::getInstance()
 953                                                 ->getPermissionManager()
 954                                                 ->userHasRight( $performer, 'hideuser' )
 955                                 ) {
 956                                         return [ 'cant-see-hidden-user' ];
 957                                 }
 958
 959                                 $priorBlock = clone $currentBlock;
 960                                 $currentBlock->isHardblock( $block->isHardblock() );
 961                                 $currentBlock->isCreateAccountBlocked( $block->isCreateAccountBlocked() );
 962                                 $currentBlock->setExpiry( $block->getExpiry() );
 963                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 964                                 $currentBlock->setHideName( $block->getHideName() );
 965                                 $currentBlock->isEmailBlocked( $block->isEmailBlocked() );
 966                                 $currentBlock->isUsertalkEditAllowed( $block->isUsertalkEditAllowed() );
 967                                 $currentBlock->setReason( $block->getReason() );
 968
 969                                 if ( $enablePartialBlocks ) {
 970                                         // Maintain the sitewide status. If partial blocks is not enabled,
 971                                         // saving the block will result in a sitewide block.
 972                                         $currentBlock->isSitewide( $block->isSitewide() );
 973
 974                                         // Set the block id of the restrictions.
 975                                         $blockRestrictionStore = MediaWikiServices::getInstance()->getBlockRestrictionStore();
 976                                         $currentBlock->setRestrictions(
 977                                                 $blockRestrictionStore->setBlockId( $currentBlock->getId(), $restrictions )
 978                                         );
 979                                 }
 980
 981                                 $status = $currentBlock->update();
 982                                 // TODO handle failure
 983
 984                                 $logaction = 'reblock';
 985
 986                                 # Unset _deleted fields if requested
 987                                 if ( $currentBlock->getHideName() && !$data['HideUser'] ) {
 988                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 989                                 }
 990
 991                                 # If hiding/unhiding a name, this should go in the private logs
 992                                 if ( (bool)$currentBlock->getHideName() ) {
 993                                         $data['HideUser'] = true;
 994                                 }
 995
 996                                 $block = $currentBlock;
 997                         }
 998                 } else {
 999                         $logaction = 'block';
1000                 }
1001
1002                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
1003
1004                 # Set *_deleted fields if requested
1005                 if ( $data['HideUser'] ) {
1006                         RevisionDeleteUser::suppressUserName( $target, $userId );
1007                 }
1008
1009                 # Can't watch a rangeblock
1010                 if ( $type != DatabaseBlock::TYPE_RANGE && $data['Watch'] ) {
1011                         WatchAction::doWatch(
1012                                 Title::makeTitle( NS_USER, $target ),
1013                                 $performer,
1014                                 User::IGNORE_USER_RIGHTS
1015                         );
1016                 }
1017
1018                 # DatabaseBlock constructor sanitizes certain block options on insert
1019                 $data['BlockEmail'] = $block->isEmailBlocked();
1020                 $data['AutoBlock'] = $block->isAutoblocking();
1021
1022                 # Prepare log parameters
1023                 $logParams = [];
1024                 $logParams['5::duration'] = $data['Expiry'];
1025                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
1026                 $logParams['sitewide'] = $block->isSitewide();
1027
1028                 if ( $enablePartialBlocks && !$block->isSitewide() ) {
1029                         if ( $data['PageRestrictions'] !== '' ) {
1030                                 $logParams['7::restrictions']['pages'] = explode( "\n", $data['PageRestrictions'] );
1031                         }
1032
1033                         if ( $data['NamespaceRestrictions'] !== '' ) {
1034                                 $logParams['7::restrictions']['namespaces'] = explode( "\n", $data['NamespaceRestrictions'] );
1035                         }
1036                 }
1037
1038                 # Make log entry, if the name is hidden, put it in the suppression log
1039                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
1040                 $logEntry = new ManualLogEntry( $log_type, $logaction );
1041                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
1042                 $logEntry->setComment( $data['Reason'][0] );
1043                 $logEntry->setPerformer( $performer );
1044                 $logEntry->setParameters( $logParams );
1045                 # Relate log ID to block ID (T27763)
1046                 $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
1047                 $logId = $logEntry->insert();
1048
1049                 if ( !empty( $data['Tags'] ) ) {
1050                         $logEntry->addTags( $data['Tags'] );
1051                 }
1052
1053                 $logEntry->publish( $logId );
1054
1055                 return true;
1056         }
1057
1058         /**
1059          * Get an array of suggested block durations from MediaWiki:Ipboptions
1060          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
1061          *     to the standard "**<duration>|<displayname>" format?
1062          * @param Language|null $lang The language to get the durations in, or null to use
1063          *     the wiki's content language
1064          * @param bool $includeOther Whether to include the 'other' option in the list of
1065          *     suggestions
1066          * @return array
1067          */
1068         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
1069                 $a = [];
1070                 $msg = $lang === null
1071                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
1072                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
1073
1074                 if ( $msg == '-' ) {
1075                         return [];
1076                 }
1077
1078                 foreach ( explode( ',', $msg ) as $option ) {
1079                         if ( strpos( $option, ':' ) === false ) {
1080                                 $option = "$option:$option";
1081                         }
1082
1083                         list( $show, $value ) = explode( ':', $option );
1084                         $a[$show] = $value;
1085                 }
1086
1087                 if ( $a && $includeOther ) {
1088                         // if options exist, add other to the end instead of the begining (which
1089                         // is what happens by default).
1090                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
1091                 }
1092
1093                 return $a;
1094         }
1095
1096         /**
1097          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
1098          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
1099          *
1100          * @todo strtotime() only accepts English strings. This means the expiry input
1101          *       can only be specified in English.
1102          * @see https://www.php.net/manual/en/function.strtotime.php
1103          *
1104          * @param string $expiry Whatever was typed into the form
1105          * @return string|bool Timestamp or 'infinity' or false on error.
1106          */
1107         public static function parseExpiryInput( $expiry ) {
1108                 if ( wfIsInfinity( $expiry ) ) {
1109                         return 'infinity';
1110                 }
1111
1112                 $expiry = strtotime( $expiry );
1113
1114                 if ( $expiry < 0 || $expiry === false ) {
1115                         return false;
1116                 }
1117
1118                 return wfTimestamp( TS_MW, $expiry );
1119         }
1120
1121         /**
1122          * Can we do an email block?
1123          * @param UserIdentity $user The sysop wanting to make a block
1124          * @return bool
1125          */
1126         public static function canBlockEmail( UserIdentity $user ) {
1127                 global $wgEnableUserEmail;
1128
1129                 return ( $wgEnableUserEmail && MediaWikiServices::getInstance()
1130                                 ->getPermissionManager()
1131                                 ->userHasRight( $user, 'blockemail' ) );
1132         }
1133
1134         /**
1135          * T17810: blocked admins should not be able to block/unblock
1136          * others, and probably shouldn't be able to unblock themselves
1137          * either.
1138          *
1139          * Exception: Users can block the user who blocked them, to reduce
1140          * advantage of a malicious account blocking all admins (T150826)
1141          *
1142          * @param User|int|string|null $target Target to block or unblock; could be a User object,
1143          *   or a user ID or username, or null when the target is not known yet (e.g. when
1144          *   displaying Special:Block)
1145          * @param User $performer User doing the request
1146          * @return bool|string True or error message key
1147          */
1148         public static function checkUnblockSelf( $target, User $performer ) {
1149                 if ( is_int( $target ) ) {
1150                         $target = User::newFromId( $target );
1151                 } elseif ( is_string( $target ) ) {
1152                         $target = User::newFromName( $target );
1153                 }
1154                 if ( $performer->getBlock() ) {
1155                         if ( $target instanceof User && $target->getId() == $performer->getId() ) {
1156                                 # User is trying to unblock themselves
1157                                 if ( MediaWikiServices::getInstance()
1158                                         ->getPermissionManager()
1159                                         ->userHasRight( $performer, 'unblockself' )
1160                                 ) {
1161                                         return true;
1162                                         # User blocked themselves and is now trying to reverse it
1163                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1164                                         return true;
1165                                 } else {
1166                                         return 'ipbnounblockself';
1167                                 }
1168                         } elseif (
1169                                 $target instanceof User &&
1170                                 $performer->getBlock() instanceof DatabaseBlock &&
1171                                 $performer->getBlock()->getBy() &&
1172                                 $performer->getBlock()->getBy() === $target->getId()
1173                         ) {
1174                                 // Allow users to block the user that blocked them.
1175                                 // This is to prevent a situation where a malicious user
1176                                 // blocks all other users. This way, the non-malicious
1177                                 // user can block the malicious user back, resulting
1178                                 // in a stalemate.
1179                                 return true;
1180
1181                         } else {
1182                                 # User is trying to block/unblock someone else
1183                                 return 'ipbblocked';
1184                         }
1185                 } else {
1186                         return true;
1187                 }
1188         }
1189
1190         /**
1191          * Return a comma-delimited list of "flags" to be passed to the log
1192          * reader for this block, to provide more information in the logs
1193          * @param array $data From HTMLForm data
1194          * @param int $type DatabaseBlock::TYPE_ constant (USER, RANGE, or IP)
1195          * @return string
1196          */
1197         protected static function blockLogFlags( array $data, $type ) {
1198                 $config = RequestContext::getMain()->getConfig();
1199
1200                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1201
1202                 $flags = [];
1203
1204                 # when blocking a user the option 'anononly' is not available/has no effect
1205                 # -> do not write this into log
1206                 if ( !$data['HardBlock'] && $type != DatabaseBlock::TYPE_USER ) {
1207                         // For grepping: message block-log-flags-anononly
1208                         $flags[] = 'anononly';
1209                 }
1210
1211                 if ( $data['CreateAccount'] ) {
1212                         // For grepping: message block-log-flags-nocreate
1213                         $flags[] = 'nocreate';
1214                 }
1215
1216                 # Same as anononly, this is not displayed when blocking an IP address
1217                 if ( !$data['AutoBlock'] && $type == DatabaseBlock::TYPE_USER ) {
1218                         // For grepping: message block-log-flags-noautoblock
1219                         $flags[] = 'noautoblock';
1220                 }
1221
1222                 if ( $data['DisableEmail'] ) {
1223                         // For grepping: message block-log-flags-noemail
1224                         $flags[] = 'noemail';
1225                 }
1226
1227                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1228                         // For grepping: message block-log-flags-nousertalk
1229                         $flags[] = 'nousertalk';
1230                 }
1231
1232                 if ( $data['HideUser'] ) {
1233                         // For grepping: message block-log-flags-hiddenname
1234                         $flags[] = 'hiddenname';
1235                 }
1236
1237                 return implode( ',', $flags );
1238         }
1239
1240         /**
1241          * Process the form on POST submission.
1242          * @param array $data
1243          * @param HTMLForm|null $form
1244          * @return bool|array True for success, false for didn't-try, array of errors on failure
1245          */
1246         public function onSubmit( array $data, HTMLForm $form = null ) {
1247                 // If "Editing" checkbox is unchecked, the block must be a partial block affecting
1248                 // actions other than editing, and there must be no restrictions.
1249                 if ( isset( $data['Editing'] ) && $data['Editing'] === false ) {
1250                         $data['EditingRestriction'] = 'partial';
1251                         $data['PageRestrictions'] = '';
1252                         $data['NamespaceRestrictions'] = '';
1253                 }
1254                 return self::processForm( $data, $form->getContext() );
1255         }
1256
1257         /**
1258          * Do something exciting on successful processing of the form, most likely to show a
1259          * confirmation message
1260          */
1261         public function onSuccess() {
1262                 $out = $this->getOutput();
1263                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1264                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1265         }
1266
1267         /**
1268          * Return an array of subpages beginning with $search that this special page will accept.
1269          *
1270          * @param string $search Prefix to search for
1271          * @param int $limit Maximum number of results to return (usually 10)
1272          * @param int $offset Number of results to skip (usually 0)
1273          * @return string[] Matching subpages
1274          */
1275         public function prefixSearchSubpages( $search, $limit, $offset ) {
1276                 $user = User::newFromName( $search );
1277                 if ( !$user ) {
1278                         // No prefix suggestion for invalid user
1279                         return [];
1280                 }
1281                 // Autocomplete subpage as user list - public to allow caching
1282                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1283         }
1284
1285         protected function getGroupName() {
1286                 return 'users';
1287         }
1288 }