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[autoinstallsdev/mediawiki.git] / includes / specials / SpecialBlock.php
diff --git a/includes/specials/SpecialBlock.php b/includes/specials/SpecialBlock.php
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+<?php
+/**
+ * Implements Special:Block
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup SpecialPage
+ */
+
+/**
+ * A special page that allows users with 'block' right to block users from
+ * editing pages and other actions
+ *
+ * @ingroup SpecialPage
+ */
+class SpecialBlock extends FormSpecialPage {
+       /** @var User|string|null User to be blocked, as passed either by parameter (url?wpTarget=Foo)
+        * or as subpage (Special:Block/Foo) */
+       protected $target;
+
+       /** @var int Block::TYPE_ constant */
+       protected $type;
+
+       /** @var User|string The previous block target */
+       protected $previousTarget;
+
+       /** @var bool Whether the previous submission of the form asked for HideUser */
+       protected $requestedHideUser;
+
+       /** @var bool */
+       protected $alreadyBlocked;
+
+       /** @var array */
+       protected $preErrors = [];
+
+       public function __construct() {
+               parent::__construct( 'Block', 'block' );
+       }
+
+       public function doesWrites() {
+               return true;
+       }
+
+       /**
+        * Checks that the user can unblock themselves if they are trying to do so
+        *
+        * @param User $user
+        * @throws ErrorPageError
+        */
+       protected function checkExecutePermissions( User $user ) {
+               parent::checkExecutePermissions( $user );
+
+               # T17810: blocked admins should have limited access here
+               $status = self::checkUnblockSelf( $this->target, $user );
+               if ( $status !== true ) {
+                       throw new ErrorPageError( 'badaccess', $status );
+               }
+       }
+
+       /**
+        * Handle some magic here
+        *
+        * @param string $par
+        */
+       protected function setParameter( $par ) {
+               # Extract variables from the request.  Try not to get into a situation where we
+               # need to extract *every* variable from the form just for processing here, but
+               # there are legitimate uses for some variables
+               $request = $this->getRequest();
+               list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
+               if ( $this->target instanceof User ) {
+                       # Set the 'relevant user' in the skin, so it displays links like Contributions,
+                       # User logs, UserRights, etc.
+                       $this->getSkin()->setRelevantUser( $this->target );
+               }
+
+               list( $this->previousTarget, /*...*/ ) =
+                       Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
+               $this->requestedHideUser = $request->getBool( 'wpHideUser' );
+       }
+
+       /**
+        * Customizes the HTMLForm a bit
+        *
+        * @param HTMLForm $form
+        */
+       protected function alterForm( HTMLForm $form ) {
+               $form->setWrapperLegendMsg( 'blockip-legend' );
+               $form->setHeaderText( '' );
+               $form->setSubmitDestructive();
+
+               $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
+               $form->setSubmitTextMsg( $msg );
+
+               $this->addHelpLink( 'Help:Blocking users' );
+
+               # Don't need to do anything if the form has been posted
+               if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
+                       $s = $form->formatErrors( $this->preErrors );
+                       if ( $s ) {
+                               $form->addHeaderText( Html::rawElement(
+                                       'div',
+                                       [ 'class' => 'error' ],
+                                       $s
+                               ) );
+                       }
+               }
+       }
+
+       /**
+        * Get the HTMLForm descriptor array for the block form
+        * @return array
+        */
+       protected function getFormFields() {
+               global $wgBlockAllowsUTEdit;
+
+               $user = $this->getUser();
+
+               $suggestedDurations = self::getSuggestedDurations();
+
+               $a = [
+                       'Target' => [
+                               'type' => 'text',
+                               'label-message' => 'ipaddressorusername',
+                               'id' => 'mw-bi-target',
+                               'size' => '45',
+                               'autofocus' => true,
+                               'required' => true,
+                               'validation-callback' => [ __CLASS__, 'validateTargetField' ],
+                               'cssclass' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
+                       ],
+                       'Expiry' => [
+                               'type' => !count( $suggestedDurations ) ? 'text' : 'selectorother',
+                               'label-message' => 'ipbexpiry',
+                               'required' => true,
+                               'options' => $suggestedDurations,
+                               'other' => $this->msg( 'ipbother' )->text(),
+                               'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
+                       ],
+                       'Reason' => [
+                               'type' => 'selectandother',
+                               'maxlength' => 255,
+                               'label-message' => 'ipbreason',
+                               'options-message' => 'ipbreason-dropdown',
+                       ],
+                       'CreateAccount' => [
+                               'type' => 'check',
+                               'label-message' => 'ipbcreateaccount',
+                               'default' => true,
+                       ],
+               ];
+
+               if ( self::canBlockEmail( $user ) ) {
+                       $a['DisableEmail'] = [
+                               'type' => 'check',
+                               'label-message' => 'ipbemailban',
+                       ];
+               }
+
+               if ( $wgBlockAllowsUTEdit ) {
+                       $a['DisableUTEdit'] = [
+                               'type' => 'check',
+                               'label-message' => 'ipb-disableusertalk',
+                               'default' => false,
+                       ];
+               }
+
+               $a['AutoBlock'] = [
+                       'type' => 'check',
+                       'label-message' => 'ipbenableautoblock',
+                       'default' => true,
+               ];
+
+               # Allow some users to hide name from block log, blocklist and listusers
+               if ( $user->isAllowed( 'hideuser' ) ) {
+                       $a['HideUser'] = [
+                               'type' => 'check',
+                               'label-message' => 'ipbhidename',
+                               'cssclass' => 'mw-block-hideuser',
+                       ];
+               }
+
+               # Watchlist their user page? (Only if user is logged in)
+               if ( $user->isLoggedIn() ) {
+                       $a['Watch'] = [
+                               'type' => 'check',
+                               'label-message' => 'ipbwatchuser',
+                       ];
+               }
+
+               $a['HardBlock'] = [
+                       'type' => 'check',
+                       'label-message' => 'ipb-hardblock',
+                       'default' => false,
+               ];
+
+               # This is basically a copy of the Target field, but the user can't change it, so we
+               # can see if the warnings we maybe showed to the user before still apply
+               $a['PreviousTarget'] = [
+                       'type' => 'hidden',
+                       'default' => false,
+               ];
+
+               # We'll turn this into a checkbox if we need to
+               $a['Confirm'] = [
+                       'type' => 'hidden',
+                       'default' => '',
+                       'label-message' => 'ipb-confirm',
+               ];
+
+               $this->maybeAlterFormDefaults( $a );
+
+               // Allow extensions to add more fields
+               Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
+
+               return $a;
+       }
+
+       /**
+        * If the user has already been blocked with similar settings, load that block
+        * and change the defaults for the form fields to match the existing settings.
+        * @param array &$fields HTMLForm descriptor array
+        * @return bool Whether fields were altered (that is, whether the target is
+        *     already blocked)
+        */
+       protected function maybeAlterFormDefaults( &$fields ) {
+               # This will be overwritten by request data
+               $fields['Target']['default'] = (string)$this->target;
+
+               if ( $this->target ) {
+                       $status = self::validateTarget( $this->target, $this->getUser() );
+                       if ( !$status->isOK() ) {
+                               $errors = $status->getErrorsArray();
+                               $this->preErrors = array_merge( $this->preErrors, $errors );
+                       }
+               }
+
+               # This won't be
+               $fields['PreviousTarget']['default'] = (string)$this->target;
+
+               $block = Block::newFromTarget( $this->target );
+
+               if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
+                       && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
+                               || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
+               ) {
+                       $fields['HardBlock']['default'] = $block->isHardblock();
+                       $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
+                       $fields['AutoBlock']['default'] = $block->isAutoblocking();
+
+                       if ( isset( $fields['DisableEmail'] ) ) {
+                               $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
+                       }
+
+                       if ( isset( $fields['HideUser'] ) ) {
+                               $fields['HideUser']['default'] = $block->mHideName;
+                       }
+
+                       if ( isset( $fields['DisableUTEdit'] ) ) {
+                               $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
+                       }
+
+                       // If the username was hidden (ipb_deleted == 1), don't show the reason
+                       // unless this user also has rights to hideuser: T37839
+                       if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
+                               $fields['Reason']['default'] = $block->mReason;
+                       } else {
+                               $fields['Reason']['default'] = '';
+                       }
+
+                       if ( $this->getRequest()->wasPosted() ) {
+                               # Ok, so we got a POST submission asking us to reblock a user.  So show the
+                               # confirm checkbox; the user will only see it if they haven't previously
+                               $fields['Confirm']['type'] = 'check';
+                       } else {
+                               # We got a target, but it wasn't a POST request, so the user must have gone
+                               # to a link like [[Special:Block/User]].  We don't need to show the checkbox
+                               # as long as they go ahead and block *that* user
+                               $fields['Confirm']['default'] = 1;
+                       }
+
+                       if ( $block->mExpiry == 'infinity' ) {
+                               $fields['Expiry']['default'] = 'infinite';
+                       } else {
+                               $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
+                       }
+
+                       $this->alreadyBlocked = true;
+                       $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
+               }
+
+               # We always need confirmation to do HideUser
+               if ( $this->requestedHideUser ) {
+                       $fields['Confirm']['type'] = 'check';
+                       unset( $fields['Confirm']['default'] );
+                       $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
+               }
+
+               # Or if the user is trying to block themselves
+               if ( (string)$this->target === $this->getUser()->getName() ) {
+                       $fields['Confirm']['type'] = 'check';
+                       unset( $fields['Confirm']['default'] );
+                       $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
+               }
+       }
+
+       /**
+        * Add header elements like block log entries, etc.
+        * @return string
+        */
+       protected function preText() {
+               $this->getOutput()->addModules( [ 'mediawiki.special.block', 'mediawiki.userSuggest' ] );
+
+               $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
+               $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
+
+               $otherBlockMessages = [];
+               if ( $this->target !== null ) {
+                       $targetName = $this->target;
+                       if ( $this->target instanceof User ) {
+                               $targetName = $this->target->getName();
+                       }
+                       # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
+                       Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
+
+                       if ( count( $otherBlockMessages ) ) {
+                               $s = Html::rawElement(
+                                       'h2',
+                                       [],
+                                       $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
+                               ) . "\n";
+
+                               $list = '';
+
+                               foreach ( $otherBlockMessages as $link ) {
+                                       $list .= Html::rawElement( 'li', [], $link ) . "\n";
+                               }
+
+                               $s .= Html::rawElement(
+                                       'ul',
+                                       [ 'class' => 'mw-blockip-alreadyblocked' ],
+                                       $list
+                               ) . "\n";
+
+                               $text .= $s;
+                       }
+               }
+
+               return $text;
+       }
+
+       /**
+        * Add footer elements to the form
+        * @return string
+        */
+       protected function postText() {
+               $links = [];
+
+               $this->getOutput()->addModuleStyles( 'mediawiki.special' );
+
+               $linkRenderer = $this->getLinkRenderer();
+               # Link to the user's contributions, if applicable
+               if ( $this->target instanceof User ) {
+                       $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
+                       $links[] = $linkRenderer->makeLink(
+                               $contribsPage,
+                               $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
+                       );
+               }
+
+               # Link to unblock the specified user, or to a blank unblock form
+               if ( $this->target instanceof User ) {
+                       $message = $this->msg(
+                               'ipb-unblock-addr',
+                               wfEscapeWikiText( $this->target->getName() )
+                       )->parse();
+                       $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
+               } else {
+                       $message = $this->msg( 'ipb-unblock' )->parse();
+                       $list = SpecialPage::getTitleFor( 'Unblock' );
+               }
+               $links[] = $linkRenderer->makeKnownLink(
+                       $list,
+                       new HtmlArmor( $message )
+               );
+
+               # Link to the block list
+               $links[] = $linkRenderer->makeKnownLink(
+                       SpecialPage::getTitleFor( 'BlockList' ),
+                       $this->msg( 'ipb-blocklist' )->text()
+               );
+
+               $user = $this->getUser();
+
+               # Link to edit the block dropdown reasons, if applicable
+               if ( $user->isAllowed( 'editinterface' ) ) {
+                       $links[] = $linkRenderer->makeKnownLink(
+                               $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
+                               $this->msg( 'ipb-edit-dropdown' )->text(),
+                               [],
+                               [ 'action' => 'edit' ]
+                       );
+               }
+
+               $text = Html::rawElement(
+                       'p',
+                       [ 'class' => 'mw-ipb-conveniencelinks' ],
+                       $this->getLanguage()->pipeList( $links )
+               );
+
+               $userTitle = self::getTargetUserTitle( $this->target );
+               if ( $userTitle ) {
+                       # Get relevant extracts from the block and suppression logs, if possible
+                       $out = '';
+
+                       LogEventsList::showLogExtract(
+                               $out,
+                               'block',
+                               $userTitle,
+                               '',
+                               [
+                                       'lim' => 10,
+                                       'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
+                                       'showIfEmpty' => false
+                               ]
+                       );
+                       $text .= $out;
+
+                       # Add suppression block entries if allowed
+                       if ( $user->isAllowed( 'suppressionlog' ) ) {
+                               LogEventsList::showLogExtract(
+                                       $out,
+                                       'suppress',
+                                       $userTitle,
+                                       '',
+                                       [
+                                               'lim' => 10,
+                                               'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
+                                               'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
+                                               'showIfEmpty' => false
+                                       ]
+                               );
+
+                               $text .= $out;
+                       }
+               }
+
+               return $text;
+       }
+
+       /**
+        * Get a user page target for things like logs.
+        * This handles account and IP range targets.
+        * @param User|string $target
+        * @return Title|null
+        */
+       protected static function getTargetUserTitle( $target ) {
+               if ( $target instanceof User ) {
+                       return $target->getUserPage();
+               } elseif ( IP::isIPAddress( $target ) ) {
+                       return Title::makeTitleSafe( NS_USER, $target );
+               }
+
+               return null;
+       }
+
+       /**
+        * Determine the target of the block, and the type of target
+        * @todo Should be in Block.php?
+        * @param string $par Subpage parameter passed to setup, or data value from
+        *     the HTMLForm
+        * @param WebRequest $request Optionally try and get data from a request too
+        * @return array [ User|string|null, Block::TYPE_ constant|null ]
+        */
+       public static function getTargetAndType( $par, WebRequest $request = null ) {
+               $i = 0;
+               $target = null;
+
+               while ( true ) {
+                       switch ( $i++ ) {
+                               case 0:
+                                       # The HTMLForm will check wpTarget first and only if it doesn't get
+                                       # a value use the default, which will be generated from the options
+                                       # below; so this has to have a higher precedence here than $par, or
+                                       # we could end up with different values in $this->target and the HTMLForm!
+                                       if ( $request instanceof WebRequest ) {
+                                               $target = $request->getText( 'wpTarget', null );
+                                       }
+                                       break;
+                               case 1:
+                                       $target = $par;
+                                       break;
+                               case 2:
+                                       if ( $request instanceof WebRequest ) {
+                                               $target = $request->getText( 'ip', null );
+                                       }
+                                       break;
+                               case 3:
+                                       # B/C @since 1.18
+                                       if ( $request instanceof WebRequest ) {
+                                               $target = $request->getText( 'wpBlockAddress', null );
+                                       }
+                                       break;
+                               case 4:
+                                       break 2;
+                       }
+
+                       list( $target, $type ) = Block::parseTarget( $target );
+
+                       if ( $type !== null ) {
+                               return [ $target, $type ];
+                       }
+               }
+
+               return [ null, null ];
+       }
+
+       /**
+        * HTMLForm field validation-callback for Target field.
+        * @since 1.18
+        * @param string $value
+        * @param array $alldata
+        * @param HTMLForm $form
+        * @return Message
+        */
+       public static function validateTargetField( $value, $alldata, $form ) {
+               $status = self::validateTarget( $value, $form->getUser() );
+               if ( !$status->isOK() ) {
+                       $errors = $status->getErrorsArray();
+
+                       return call_user_func_array( [ $form, 'msg' ], $errors[0] );
+               } else {
+                       return true;
+               }
+       }
+
+       /**
+        * Validate a block target.
+        *
+        * @since 1.21
+        * @param string $value Block target to check
+        * @param User $user Performer of the block
+        * @return Status
+        */
+       public static function validateTarget( $value, User $user ) {
+               global $wgBlockCIDRLimit;
+
+               /** @var User $target */
+               list( $target, $type ) = self::getTargetAndType( $value );
+               $status = Status::newGood( $target );
+
+               if ( $type == Block::TYPE_USER ) {
+                       if ( $target->isAnon() ) {
+                               $status->fatal(
+                                       'nosuchusershort',
+                                       wfEscapeWikiText( $target->getName() )
+                               );
+                       }
+
+                       $unblockStatus = self::checkUnblockSelf( $target, $user );
+                       if ( $unblockStatus !== true ) {
+                               $status->fatal( 'badaccess', $unblockStatus );
+                       }
+               } elseif ( $type == Block::TYPE_RANGE ) {
+                       list( $ip, $range ) = explode( '/', $target, 2 );
+
+                       if (
+                               ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
+                               ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
+                       ) {
+                               // Range block effectively disabled
+                               $status->fatal( 'range_block_disabled' );
+                       }
+
+                       if (
+                               ( IP::isIPv4( $ip ) && $range > 32 ) ||
+                               ( IP::isIPv6( $ip ) && $range > 128 )
+                       ) {
+                               // Dodgy range
+                               $status->fatal( 'ip_range_invalid' );
+                       }
+
+                       if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
+                               $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
+                       }
+
+                       if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
+                               $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
+                       }
+               } elseif ( $type == Block::TYPE_IP ) {
+                       # All is well
+               } else {
+                       $status->fatal( 'badipaddress' );
+               }
+
+               return $status;
+       }
+
+       /**
+        * Given the form data, actually implement a block. This is also called from ApiBlock.
+        *
+        * @param array $data
+        * @param IContextSource $context
+        * @return bool|string
+        */
+       public static function processForm( array $data, IContextSource $context ) {
+               global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
+
+               $performer = $context->getUser();
+
+               // Handled by field validator callback
+               // self::validateTargetField( $data['Target'] );
+
+               # This might have been a hidden field or a checkbox, so interesting data
+               # can come from it
+               $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
+
+               /** @var User $target */
+               list( $target, $type ) = self::getTargetAndType( $data['Target'] );
+               if ( $type == Block::TYPE_USER ) {
+                       $user = $target;
+                       $target = $user->getName();
+                       $userId = $user->getId();
+
+                       # Give admins a heads-up before they go and block themselves.  Much messier
+                       # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
+                       # permission anyway, although the code does allow for it.
+                       # Note: Important to use $target instead of $data['Target']
+                       # since both $data['PreviousTarget'] and $target are normalized
+                       # but $data['target'] gets overridden by (non-normalized) request variable
+                       # from previous request.
+                       if ( $target === $performer->getName() &&
+                               ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
+                       ) {
+                               return [ 'ipb-blockingself', 'ipb-confirmaction' ];
+                       }
+               } elseif ( $type == Block::TYPE_RANGE ) {
+                       $user = null;
+                       $userId = 0;
+               } elseif ( $type == Block::TYPE_IP ) {
+                       $user = null;
+                       $target = $target->getName();
+                       $userId = 0;
+               } else {
+                       # This should have been caught in the form field validation
+                       return [ 'badipaddress' ];
+               }
+
+               $expiryTime = self::parseExpiryInput( $data['Expiry'] );
+
+               if (
+                       // an expiry time is needed
+                       ( strlen( $data['Expiry'] ) == 0 ) ||
+                       // can't be a larger string as 50 (it should be a time format in any way)
+                       ( strlen( $data['Expiry'] ) > 50 ) ||
+                       // check, if the time could be parsed
+                       !$expiryTime
+               ) {
+                       return [ 'ipb_expiry_invalid' ];
+               }
+
+               // an expiry time should be in the future, not in the
+               // past (wouldn't make any sense) - bug T123069
+               if ( $expiryTime < wfTimestampNow() ) {
+                       return [ 'ipb_expiry_old' ];
+               }
+
+               if ( !isset( $data['DisableEmail'] ) ) {
+                       $data['DisableEmail'] = false;
+               }
+
+               # If the user has done the form 'properly', they won't even have been given the
+               # option to suppress-block unless they have the 'hideuser' permission
+               if ( !isset( $data['HideUser'] ) ) {
+                       $data['HideUser'] = false;
+               }
+
+               if ( $data['HideUser'] ) {
+                       if ( !$performer->isAllowed( 'hideuser' ) ) {
+                               # this codepath is unreachable except by a malicious user spoofing forms,
+                               # or by race conditions (user has hideuser and block rights, loads block form,
+                               # and loses hideuser rights before submission); so need to fail completely
+                               # rather than just silently disable hiding
+                               return [ 'badaccess-group0' ];
+                       }
+
+                       # Recheck params here...
+                       if ( $type != Block::TYPE_USER ) {
+                               $data['HideUser'] = false; # IP users should not be hidden
+                       } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
+                               # Bad expiry.
+                               return [ 'ipb_expiry_temp' ];
+                       } elseif ( $wgHideUserContribLimit !== false
+                               && $user->getEditCount() > $wgHideUserContribLimit
+                       ) {
+                               # Typically, the user should have a handful of edits.
+                               # Disallow hiding users with many edits for performance.
+                               return [ [ 'ipb_hide_invalid',
+                                       Message::numParam( $wgHideUserContribLimit ) ] ];
+                       } elseif ( !$data['Confirm'] ) {
+                               return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
+                       }
+               }
+
+               # Create block object.
+               $block = new Block();
+               $block->setTarget( $target );
+               $block->setBlocker( $performer );
+               $block->mReason = $data['Reason'][0];
+               $block->mExpiry = $expiryTime;
+               $block->prevents( 'createaccount', $data['CreateAccount'] );
+               $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
+               $block->prevents( 'sendemail', $data['DisableEmail'] );
+               $block->isHardblock( $data['HardBlock'] );
+               $block->isAutoblocking( $data['AutoBlock'] );
+               $block->mHideName = $data['HideUser'];
+
+               $reason = [ 'hookaborted' ];
+               if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
+                       return $reason;
+               }
+
+               $priorBlock = null;
+               # Try to insert block. Is there a conflicting block?
+               $status = $block->insert();
+               if ( !$status ) {
+                       # Indicates whether the user is confirming the block and is aware of
+                       # the conflict (did not change the block target in the meantime)
+                       $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
+                               && $data['PreviousTarget'] !== $target );
+
+                       # Special case for API - T34434
+                       $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
+
+                       # Show form unless the user is already aware of this...
+                       if ( $blockNotConfirmed || $reblockNotAllowed ) {
+                               return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
+                               # Otherwise, try to update the block...
+                       } else {
+                               # This returns direct blocks before autoblocks/rangeblocks, since we should
+                               # be sure the user is blocked by now it should work for our purposes
+                               $currentBlock = Block::newFromTarget( $target );
+                               if ( $block->equals( $currentBlock ) ) {
+                                       return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
+                               }
+                               # If the name was hidden and the blocking user cannot hide
+                               # names, then don't allow any block changes...
+                               if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
+                                       return [ 'cant-see-hidden-user' ];
+                               }
+
+                               $priorBlock = clone $currentBlock;
+                               $currentBlock->isHardblock( $block->isHardblock() );
+                               $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
+                               $currentBlock->mExpiry = $block->mExpiry;
+                               $currentBlock->isAutoblocking( $block->isAutoblocking() );
+                               $currentBlock->mHideName = $block->mHideName;
+                               $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
+                               $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
+                               $currentBlock->mReason = $block->mReason;
+
+                               $status = $currentBlock->update();
+
+                               $logaction = 'reblock';
+
+                               # Unset _deleted fields if requested
+                               if ( $currentBlock->mHideName && !$data['HideUser'] ) {
+                                       RevisionDeleteUser::unsuppressUserName( $target, $userId );
+                               }
+
+                               # If hiding/unhiding a name, this should go in the private logs
+                               if ( (bool)$currentBlock->mHideName ) {
+                                       $data['HideUser'] = true;
+                               }
+                       }
+               } else {
+                       $logaction = 'block';
+               }
+
+               Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
+
+               # Set *_deleted fields if requested
+               if ( $data['HideUser'] ) {
+                       RevisionDeleteUser::suppressUserName( $target, $userId );
+               }
+
+               # Can't watch a rangeblock
+               if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
+                       WatchAction::doWatch(
+                               Title::makeTitle( NS_USER, $target ),
+                               $performer,
+                               User::IGNORE_USER_RIGHTS
+                       );
+               }
+
+               # Block constructor sanitizes certain block options on insert
+               $data['BlockEmail'] = $block->prevents( 'sendemail' );
+               $data['AutoBlock'] = $block->isAutoblocking();
+
+               # Prepare log parameters
+               $logParams = [];
+               $logParams['5::duration'] = $data['Expiry'];
+               $logParams['6::flags'] = self::blockLogFlags( $data, $type );
+
+               # Make log entry, if the name is hidden, put it in the suppression log
+               $log_type = $data['HideUser'] ? 'suppress' : 'block';
+               $logEntry = new ManualLogEntry( $log_type, $logaction );
+               $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
+               $logEntry->setComment( $data['Reason'][0] );
+               $logEntry->setPerformer( $performer );
+               $logEntry->setParameters( $logParams );
+               # Relate log ID to block IDs (T27763)
+               $blockIds = array_merge( [ $status['id'] ], $status['autoIds'] );
+               $logEntry->setRelations( [ 'ipb_id' => $blockIds ] );
+               $logId = $logEntry->insert();
+
+               if ( !empty( $data['Tags'] ) ) {
+                       $logEntry->setTags( $data['Tags'] );
+               }
+
+               $logEntry->publish( $logId );
+
+               return true;
+       }
+
+       /**
+        * Get an array of suggested block durations from MediaWiki:Ipboptions
+        * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
+        *     to the standard "**<duration>|<displayname>" format?
+        * @param Language|null $lang The language to get the durations in, or null to use
+        *     the wiki's content language
+        * @return array
+        */
+       public static function getSuggestedDurations( $lang = null ) {
+               $a = [];
+               $msg = $lang === null
+                       ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
+                       : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
+
+               if ( $msg == '-' ) {
+                       return [];
+               }
+
+               foreach ( explode( ',', $msg ) as $option ) {
+                       if ( strpos( $option, ':' ) === false ) {
+                               $option = "$option:$option";
+                       }
+
+                       list( $show, $value ) = explode( ':', $option );
+                       $a[$show] = $value;
+               }
+
+               return $a;
+       }
+
+       /**
+        * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
+        * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
+        * @param string $expiry Whatever was typed into the form
+        * @return string Timestamp or 'infinity'
+        */
+       public static function parseExpiryInput( $expiry ) {
+               if ( wfIsInfinity( $expiry ) ) {
+                       $expiry = 'infinity';
+               } else {
+                       $expiry = strtotime( $expiry );
+
+                       if ( $expiry < 0 || $expiry === false ) {
+                               return false;
+                       }
+
+                       $expiry = wfTimestamp( TS_MW, $expiry );
+               }
+
+               return $expiry;
+       }
+
+       /**
+        * Can we do an email block?
+        * @param User $user The sysop wanting to make a block
+        * @return bool
+        */
+       public static function canBlockEmail( $user ) {
+               global $wgEnableUserEmail, $wgSysopEmailBans;
+
+               return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
+       }
+
+       /**
+        * T17810: blocked admins should not be able to block/unblock
+        * others, and probably shouldn't be able to unblock themselves
+        * either.
+        * @param User|int|string $user
+        * @param User $performer User doing the request
+        * @return bool|string True or error message key
+        */
+       public static function checkUnblockSelf( $user, User $performer ) {
+               if ( is_int( $user ) ) {
+                       $user = User::newFromId( $user );
+               } elseif ( is_string( $user ) ) {
+                       $user = User::newFromName( $user );
+               }
+
+               if ( $performer->isBlocked() ) {
+                       if ( $user instanceof User && $user->getId() == $performer->getId() ) {
+                               # User is trying to unblock themselves
+                               if ( $performer->isAllowed( 'unblockself' ) ) {
+                                       return true;
+                                       # User blocked themselves and is now trying to reverse it
+                               } elseif ( $performer->blockedBy() === $performer->getName() ) {
+                                       return true;
+                               } else {
+                                       return 'ipbnounblockself';
+                               }
+                       } else {
+                               # User is trying to block/unblock someone else
+                               return 'ipbblocked';
+                       }
+               } else {
+                       return true;
+               }
+       }
+
+       /**
+        * Return a comma-delimited list of "flags" to be passed to the log
+        * reader for this block, to provide more information in the logs
+        * @param array $data From HTMLForm data
+        * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
+        * @return string
+        */
+       protected static function blockLogFlags( array $data, $type ) {
+               global $wgBlockAllowsUTEdit;
+               $flags = [];
+
+               # when blocking a user the option 'anononly' is not available/has no effect
+               # -> do not write this into log
+               if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
+                       // For grepping: message block-log-flags-anononly
+                       $flags[] = 'anononly';
+               }
+
+               if ( $data['CreateAccount'] ) {
+                       // For grepping: message block-log-flags-nocreate
+                       $flags[] = 'nocreate';
+               }
+
+               # Same as anononly, this is not displayed when blocking an IP address
+               if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
+                       // For grepping: message block-log-flags-noautoblock
+                       $flags[] = 'noautoblock';
+               }
+
+               if ( $data['DisableEmail'] ) {
+                       // For grepping: message block-log-flags-noemail
+                       $flags[] = 'noemail';
+               }
+
+               if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
+                       // For grepping: message block-log-flags-nousertalk
+                       $flags[] = 'nousertalk';
+               }
+
+               if ( $data['HideUser'] ) {
+                       // For grepping: message block-log-flags-hiddenname
+                       $flags[] = 'hiddenname';
+               }
+
+               return implode( ',', $flags );
+       }
+
+       /**
+        * Process the form on POST submission.
+        * @param array $data
+        * @param HTMLForm $form
+        * @return bool|array True for success, false for didn't-try, array of errors on failure
+        */
+       public function onSubmit( array $data, HTMLForm $form = null ) {
+               return self::processForm( $data, $form->getContext() );
+       }
+
+       /**
+        * Do something exciting on successful processing of the form, most likely to show a
+        * confirmation message
+        */
+       public function onSuccess() {
+               $out = $this->getOutput();
+               $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
+               $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
+       }
+
+       /**
+        * Return an array of subpages beginning with $search that this special page will accept.
+        *
+        * @param string $search Prefix to search for
+        * @param int $limit Maximum number of results to return (usually 10)
+        * @param int $offset Number of results to skip (usually 0)
+        * @return string[] Matching subpages
+        */
+       public function prefixSearchSubpages( $search, $limit, $offset ) {
+               $user = User::newFromName( $search );
+               if ( !$user ) {
+                       // No prefix suggestion for invalid user
+                       return [];
+               }
+               // Autocomplete subpage as user list - public to allow caching
+               return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
+       }
+
+       protected function getGroupName() {
+               return 'users';
+       }
+}