SpecialBlock.php

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<?php
use MediaWiki\Block\DatabaseBlock;
use MediaWiki\Block\Restriction\NamespaceRestriction;
use MediaWiki\Block\Restriction\PageRestriction;
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Permissions\PermissionManager;
use MediaWiki\User\UserIdentity;
use Wikimedia\IPUtils;
 
class SpecialBlock extends FormSpecialPage {
    private $permissionManager;
 
    protected $target;
 
    protected $type;
 
    protected $previousTarget;
 
    protected $requestedHideUser;
 
    protected $alreadyBlocked;
 
    protected $preErrors = [];
 
    public function __construct( PermissionManager $permissionManager ) {
        parent::__construct( 'Block', 'block' );
 
        $this->permissionManager = $permissionManager;
    }
 
    public function doesWrites() {
        return true;
    }
 
    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 );
        }
    }
 
    public function requiresUnblock() {
        return false;
    }
 
    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, /*...*/ ) =
            DatabaseBlock::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
        $this->requestedHideUser = $request->getBool( 'wpHideUser' );
    }
 
    protected function alterForm( HTMLForm $form ) {
        $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
                ) );
            }
        }
    }
 
    protected function getDisplayFormat() {
        return 'ooui';
    }
 
    protected function getFormFields() {
        $conf = $this->getConfig();
        $blockAllowsUTEdit = $conf->get( 'BlockAllowsUTEdit' );
 
        $this->getOutput()->enableOOUI();
 
        $user = $this->getUser();
 
        $suggestedDurations = self::getSuggestedDurations();
 
        $a = [];
 
        $a['Target'] = [
            'type' => 'user',
            'ipallowed' => true,
            'iprange' => true,
            'id' => 'mw-bi-target',
            'size' => '45',
            'autofocus' => true,
            'required' => true,
            'validation-callback' => [ __CLASS__, 'validateTargetField' ],
            'section' => 'target',
        ];
 
        $a['Editing'] = [
            'type' => 'check',
            'label-message' => 'block-prevent-edit',
            'default' => true,
            'section' => 'actions',
        ];
 
        $a['EditingRestriction'] = [
            'type' => 'radio',
            'cssclass' => 'mw-block-editing-restriction',
            'default' => 'sitewide',
            'options' => [
                $this->msg( 'ipb-sitewide' )->escaped() .
                    new \OOUI\LabelWidget( [
                        'classes' => [ 'oo-ui-inline-help' ],
                        'label' => $this->msg( 'ipb-sitewide-help' )->text(),
                    ] ) => 'sitewide',
                $this->msg( 'ipb-partial' )->escaped() .
                    new \OOUI\LabelWidget( [
                        'classes' => [ 'oo-ui-inline-help' ],
                        'label' => $this->msg( 'ipb-partial-help' )->text(),
                    ] ) => 'partial',
            ],
            'section' => 'actions',
        ];
 
        $a['PageRestrictions'] = [
            'type' => 'titlesmultiselect',
            'label' => $this->msg( 'ipb-pages-label' )->text(),
            'exists' => true,
            'max' => 10,
            'cssclass' => 'mw-block-restriction',
            'default' => '',
            'showMissing' => false,
            'excludeDynamicNamespaces' => true,
            'input' => [
                'autocomplete' => false
            ],
            'section' => 'actions',
        ];
 
        $a['NamespaceRestrictions'] = [
            'type' => 'namespacesmultiselect',
            'label' => $this->msg( 'ipb-namespaces-label' )->text(),
            'exists' => true,
            'cssclass' => 'mw-block-restriction',
            'default' => '',
            'input' => [
                'autocomplete' => false
            ],
            'section' => 'actions',
        ];
 
        $a['CreateAccount'] = [
            'type' => 'check',
            'label-message' => 'ipbcreateaccount',
            'default' => true,
            'section' => 'actions',
        ];
 
        if ( self::canBlockEmail( $user ) ) {
            $a['DisableEmail'] = [
                'type' => 'check',
                'label-message' => 'ipbemailban',
                'section' => 'actions',
            ];
        }
 
        if ( $blockAllowsUTEdit ) {
            $a['DisableUTEdit'] = [
                'type' => 'check',
                'label-message' => 'ipb-disableusertalk',
                'default' => false,
                'section' => 'actions',
            ];
        }
 
        $defaultExpiry = $this->msg( 'ipb-default-expiry' )->inContentLanguage();
        if ( $this->type === DatabaseBlock::TYPE_RANGE || $this->type === DatabaseBlock::TYPE_IP ) {
            $defaultExpiryIP = $this->msg( 'ipb-default-expiry-ip' )->inContentLanguage();
            if ( !$defaultExpiryIP->isDisabled() ) {
                $defaultExpiry = $defaultExpiryIP;
            }
        }
 
        $a['Expiry'] = [
            'type' => 'expiry',
            'required' => true,
            'options' => $suggestedDurations,
            'default' => $defaultExpiry->text(),
            'section' => 'expiry',
        ];
 
        $a['Reason'] = [
            'type' => 'selectandother',
            // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
            // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
            // Unicode codepoints.
            'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
            'maxlength-unit' => 'codepoints',
            'options-message' => 'ipbreason-dropdown',
            'section' => 'reason',
        ];
 
        $a['AutoBlock'] = [
            'type' => 'check',
            'label-message' => 'ipbenableautoblock',
            'default' => true,
            'section' => 'options',
        ];
 
        # Allow some users to hide name from block log, blocklist and listusers
        if ( $this->permissionManager->userHasRight( $user, 'hideuser' ) ) {
            $a['HideUser'] = [
                'type' => 'check',
                'label-message' => 'ipbhidename',
                'cssclass' => 'mw-block-hideuser',
                'section' => 'options',
            ];
        }
 
        # Watchlist their user page? (Only if user is logged in)
        if ( $user->isLoggedIn() ) {
            $a['Watch'] = [
                'type' => 'check',
                'label-message' => 'ipbwatchuser',
                'section' => 'options',
            ];
        }
 
        $a['HardBlock'] = [
            'type' => 'check',
            'label-message' => 'ipb-hardblock',
            'default' => false,
            'section' => 'options',
        ];
 
        # 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',
            'cssclass' => 'mw-block-confirm',
        ];
 
        $this->maybeAlterFormDefaults( $a );
 
        // Allow extensions to add more fields
        $this->getHookRunner()->onSpecialBlockModifyFormFields( $this, $a );
 
        return $a;
    }
 
    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 = DatabaseBlock::newFromTarget( $this->target );
 
        // Populate fields if there is a block that is not an autoblock; if it is a range
        // block, only populate the fields if the range is the same as $this->target
        if ( $block instanceof DatabaseBlock && $block->getType() !== DatabaseBlock::TYPE_AUTO
            && ( $this->type != DatabaseBlock::TYPE_RANGE
                || $block->getTarget() == $this->target )
        ) {
            $fields['HardBlock']['default'] = $block->isHardblock();
            $fields['CreateAccount']['default'] = $block->isCreateAccountBlocked();
            $fields['AutoBlock']['default'] = $block->isAutoblocking();
 
            if ( isset( $fields['DisableEmail'] ) ) {
                $fields['DisableEmail']['default'] = $block->isEmailBlocked();
            }
 
            if ( isset( $fields['HideUser'] ) ) {
                $fields['HideUser']['default'] = $block->getHideName();
            }
 
            if ( isset( $fields['DisableUTEdit'] ) ) {
                $fields['DisableUTEdit']['default'] = !$block->isUsertalkEditAllowed();
            }
 
            // If the username was hidden (ipb_deleted == 1), don't show the reason
            // unless this user also has rights to hideuser: T37839
            if ( !$block->getHideName() || $this->permissionManager
                    ->userHasRight( $this->getUser(), 'hideuser' )
            ) {
                $fields['Reason']['default'] = $block->getReasonComment()->text;
            } 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->getExpiry() == 'infinity' ) {
                $fields['Expiry']['default'] = 'infinite';
            } else {
                $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->getExpiry() );
            }
 
            if ( !$block->isSitewide() ) {
                $fields['EditingRestriction']['default'] = 'partial';
 
                $pageRestrictions = [];
                $namespaceRestrictions = [];
                foreach ( $block->getRestrictions() as $restriction ) {
                    if ( $restriction instanceof PageRestriction && $restriction->getTitle() ) {
                        $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
                    } elseif ( $restriction instanceof NamespaceRestriction ) {
                        $namespaceRestrictions[] = $restriction->getValue();
                    }
                }
 
                // Sort the restrictions so they are in alphabetical order.
                sort( $pageRestrictions );
                $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
                sort( $namespaceRestrictions );
                $fields['NamespaceRestrictions']['default'] = implode( "\n", $namespaceRestrictions );
 
                if (
                    empty( $pageRestrictions ) &&
                    empty( $namespaceRestrictions )
                ) {
                    $fields['Editing']['default'] = false;
                }
            }
 
            $this->alreadyBlocked = true;
            $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
        }
 
        if ( $this->alreadyBlocked || $this->getRequest()->wasPosted()
            || $this->getRequest()->getCheck( 'wpCreateAccount' )
        ) {
            $this->getOutput()->addJsConfigVars( 'wgCreateAccountDirty', true );
        }
 
        # 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' ];
        }
    }
 
    protected function preText() {
        $this->getOutput()->addModuleStyles( [
            'mediawiki.widgets.TagMultiselectWidget.styles',
            'mediawiki.special',
        ] );
        $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 
        $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
            $this->getHookRunner()->onOtherBlockLogLink(
                $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;
    }
 
    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 ( $this->permissionManager->userHasRight( $user, '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 ( $this->permissionManager->userHasRight( $user, '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;
    }
 
    protected static function getTargetUserTitle( $target ) {
        if ( $target instanceof User ) {
            return $target->getUserPage();
        }
 
        if ( is_string( $target ) && IPUtils::isIPAddress( $target ) ) {
            return Title::makeTitleSafe( NS_USER, $target );
        }
 
        return 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 ) = DatabaseBlock::parseTarget( $target );
 
            if ( $type !== null ) {
                return [ $target, $type ];
            }
        }
 
        return [ null, null ];
    }
 
    public static function validateTargetField( $value, $alldata, $form ) {
        $status = self::validateTarget( $value, $form->getUser() );
        if ( !$status->isOK() ) {
            $errors = $status->getErrorsArray();
 
            return $form->msg( ...$errors[0] );
        } else {
            return true;
        }
    }
 
    public static function validateTarget( $value, User $user ) {
        global $wgBlockCIDRLimit;
 
        list( $target, $type ) = self::getTargetAndType( $value );
        $status = Status::newGood( $target );
 
        if ( $type == DatabaseBlock::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 == DatabaseBlock::TYPE_RANGE ) {
            list( $ip, $range ) = explode( '/', $target, 2 );
 
            if (
                ( IPUtils::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
                ( IPUtils::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
            ) {
                // Range block effectively disabled
                $status->fatal( 'range_block_disabled' );
            }
 
            if (
                ( IPUtils::isIPv4( $ip ) && $range > 32 ) ||
                ( IPUtils::isIPv6( $ip ) && $range > 128 )
            ) {
                // Dodgy range
                $status->fatal( 'ip_range_invalid' );
            }
 
            if ( IPUtils::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
                $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
            }
 
            if ( IPUtils::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
                $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
            }
        } elseif ( $type == DatabaseBlock::TYPE_IP ) {
            # All is well
        } else {
            $status->fatal( 'badipaddress' );
        }
 
        return $status;
    }
 
    public static function processForm( array $data, IContextSource $context ) {
        $performer = $context->getUser();
        $isPartialBlock = isset( $data['EditingRestriction'] ) &&
            $data['EditingRestriction'] === 'partial';
 
        # 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 );
 
        list( $target, $type ) = self::getTargetAndType( $data['Target'] );
        if ( $type == DatabaseBlock::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 == DatabaseBlock::TYPE_RANGE ) {
            $user = null;
            $userId = 0;
        } elseif ( $type == DatabaseBlock::TYPE_IP ) {
            $user = null;
            $target = $target->getName();
            $userId = 0;
        } else {
            # This should have been caught in the form field validation
            return [ 'badipaddress' ];
        }
 
        // Reason, to be passed to the block object. For default values of reason, see
        // HTMLSelectAndOtherField::getDefault
        // @phan-suppress-next-line PhanPluginDuplicateConditionalNullCoalescing
        $blockReason = isset( $data['Reason'][0] ) ? $data['Reason'][0] : '';
 
        $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 ( !MediaWikiServices::getInstance()
                ->getPermissionManager()
                ->userHasRight( $performer, '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' ];
            }
 
            if ( $isPartialBlock ) {
                return [ 'ipb_hide_partial' ];
            }
 
            # Recheck params here...
            $hideUserContribLimit = $context->getConfig()->get( 'HideUserContribLimit' );
            if ( $type != DatabaseBlock::TYPE_USER ) {
                $data['HideUser'] = false; # IP users should not be hidden
            } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
                # Bad expiry.
                return [ 'ipb_expiry_temp' ];
            } elseif ( $hideUserContribLimit !== false
                && $user->getEditCount() > $hideUserContribLimit
            ) {
                # Typically, the user should have a handful of edits.
                # Disallow hiding users with many edits for performance.
                return [ [ 'ipb_hide_invalid',
                    Message::numParam( $hideUserContribLimit ) ] ];
            } elseif ( !$data['Confirm'] ) {
                return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
            }
        }
 
        // Check whether the user can edit their own user talk page.
        $blockAllowsUTEdit = $context->getConfig()->get( 'BlockAllowsUTEdit' );
        $isUserTalkNamespaceBlock = !$isPartialBlock ||
            in_array( NS_USER_TALK, explode( "\n", $data['NamespaceRestrictions'] ) );
        if ( $isUserTalkNamespaceBlock ) {
            // If the block blocks the user talk namespace, disallow own user talk edit if
            // the global config disallows it; otherwise use the form field value.
            $userTalkEditAllowed = $blockAllowsUTEdit ? !$data['DisableUTEdit'] : false;
        } else {
            // If the block doesn't block the user talk namespace, then it can't block own
            // user talk edit, regardless of the config or field (T210475). Return error
            // message if the field tries to disallow own user talk edit.
            if ( isset( $data['DisableUTEdit'] ) && $data['DisableUTEdit'] ) {
                return [ 'ipb-prevent-user-talk-edit' ];
            }
            $userTalkEditAllowed = true;
        }
 
        // A block is empty if it is a partial block, the page restrictions are empty, the
        // namespace restrictions are empty, and none of the actions are enabled
        if ( $isPartialBlock &&
            !( isset( $data['PageRestrictions'] ) && $data['PageRestrictions'] !== '' ) &&
            !( isset( $data['NamespaceRestrictions'] ) && $data['NamespaceRestrictions'] !== '' ) &&
            $data['DisableEmail'] === false &&
            ( $userTalkEditAllowed || !$blockAllowsUTEdit ) &&
            !$data['CreateAccount']
        ) {
            return [ 'ipb-empty-block' ];
        }
 
        # Create block object.
        $block = new DatabaseBlock();
        $block->setTarget( $target );
        $block->setBlocker( $performer );
        $block->setReason( $blockReason );
        $block->setExpiry( $expiryTime );
        $block->isCreateAccountBlocked( $data['CreateAccount'] );
        $block->isUsertalkEditAllowed( $userTalkEditAllowed );
        $block->isEmailBlocked( $data['DisableEmail'] );
        $block->isHardblock( $data['HardBlock'] );
        $block->isAutoblocking( $data['AutoBlock'] );
        $block->setHideName( $data['HideUser'] );
 
        if ( $isPartialBlock ) {
            $block->isSitewide( false );
        }
 
        $reason = [ 'hookaborted' ];
        if ( !Hooks::runner()->onBlockIp( $block, $performer, $reason ) ) {
            return $reason;
        }
 
        $pageRestrictions = [];
        $namespaceRestrictions = [];
        if ( isset( $data['PageRestrictions'] ) && $data['PageRestrictions'] !== '' ) {
            $pageRestrictions = array_map( function ( $text ) {
                $title = Title::newFromText( $text );
                // Use the link cache since the title has already been loaded when
                // the field was validated.
                $restriction = new PageRestriction( 0, $title->getArticleID() );
                $restriction->setTitle( $title );
                return $restriction;
            }, explode( "\n", $data['PageRestrictions'] ) );
        }
        if ( isset( $data['NamespaceRestrictions'] ) && $data['NamespaceRestrictions'] !== '' ) {
            $namespaceRestrictions = array_map( function ( $id ) {
                return new NamespaceRestriction( 0, $id );
            }, explode( "\n", $data['NamespaceRestrictions'] ) );
        }
 
        $restrictions = ( array_merge( $pageRestrictions, $namespaceRestrictions ) );
        $block->setRestrictions( $restrictions );
 
        $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 = DatabaseBlock::newFromTarget( $target );
                if ( !$currentBlock instanceof DatabaseBlock ) {
                    $logger = LoggerFactory::getInstance( 'BlockManager' );
                    $logger->warning( 'Block could not be inserted. No existing block was found.' );
                    return [ [ 'ipb-block-not-found', $block->getTarget() ] ];
                }
                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->getHideName() && !MediaWikiServices::getInstance()
                        ->getPermissionManager()
                        ->userHasRight( $performer, 'hideuser' )
                ) {
                    return [ 'cant-see-hidden-user' ];
                }
 
                $priorBlock = clone $currentBlock;
                $currentBlock->setBlocker( $performer );
                $currentBlock->isHardblock( $block->isHardblock() );
                $currentBlock->isCreateAccountBlocked( $block->isCreateAccountBlocked() );
                $currentBlock->setExpiry( $block->getExpiry() );
                $currentBlock->isAutoblocking( $block->isAutoblocking() );
                $currentBlock->setHideName( $block->getHideName() );
                $currentBlock->isEmailBlocked( $block->isEmailBlocked() );
                $currentBlock->isUsertalkEditAllowed( $block->isUsertalkEditAllowed() );
                $currentBlock->setReason( $block->getReasonComment() );
 
                // Maintain the sitewide status. If partial blocks is not enabled,
                // saving the block will result in a sitewide block.
                $currentBlock->isSitewide( $block->isSitewide() );
 
                // Set the block id of the restrictions.
                $blockRestrictionStore = MediaWikiServices::getInstance()->getBlockRestrictionStore();
                $currentBlock->setRestrictions(
                    $blockRestrictionStore->setBlockId( $currentBlock->getId(), $restrictions )
                );
 
                $status = $currentBlock->update();
                // TODO handle failure
 
                $logaction = 'reblock';
 
                # Unset _deleted fields if requested
                if ( $currentBlock->getHideName() && !$data['HideUser'] ) {
                    RevisionDeleteUser::unsuppressUserName( $target, $userId );
                }
 
                # If hiding/unhiding a name, this should go in the private logs
                if ( (bool)$currentBlock->getHideName() ) {
                    $data['HideUser'] = true;
                }
 
                $block = $currentBlock;
            }
        } else {
            $logaction = 'block';
        }
 
        Hooks::runner()->onBlockIpComplete( $block, $performer, $priorBlock );
 
        # Set *_deleted fields if requested
        if ( $data['HideUser'] ) {
            RevisionDeleteUser::suppressUserName( $target, $userId );
        }
 
        # Can't watch a rangeblock
        if ( $type != DatabaseBlock::TYPE_RANGE && $data['Watch'] ) {
            WatchAction::doWatch(
                Title::makeTitle( NS_USER, $target ),
                $performer,
                User::IGNORE_USER_RIGHTS
            );
        }
 
        # DatabaseBlock constructor sanitizes certain block options on insert
        $data['BlockEmail'] = $block->isEmailBlocked();
        $data['AutoBlock'] = $block->isAutoblocking();
 
        # Prepare log parameters
        $logParams = [];
 
        $rawExpiry = $data['Expiry'];
        $logExpiry = wfIsInfinity( $rawExpiry ) ? 'infinity' : $rawExpiry;
 
        $logParams['5::duration'] = $logExpiry;
        $logParams['6::flags'] = self::blockLogFlags( $data, $type );
        $logParams['sitewide'] = $block->isSitewide();
 
        if ( !$block->isSitewide() ) {
            if ( $data['PageRestrictions'] !== '' ) {
                $logParams['7::restrictions']['pages'] = explode( "\n", $data['PageRestrictions'] );
            }
 
            if ( $data['NamespaceRestrictions'] !== '' ) {
                $logParams['7::restrictions']['namespaces'] = explode( "\n", $data['NamespaceRestrictions'] );
            }
        }
 
        # 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( $blockReason );
        $logEntry->setPerformer( $performer );
        $logEntry->setParameters( $logParams );
        # Relate log ID to block ID (T27763)
        $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
        $logId = $logEntry->insert();
 
        if ( !empty( $data['Tags'] ) ) {
            $logEntry->addTags( $data['Tags'] );
        }
 
        $logEntry->publish( $logId );
 
        return true;
    }
 
    public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
        $msg = $lang === null
            ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
            : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 
        if ( $msg == '-' ) {
            return [];
        }
 
        $a = XmlSelect::parseOptionsMessage( $msg );
 
        if ( $a && $includeOther ) {
            // if options exist, add other to the end instead of the begining (which
            // is what happens by default).
            $a[ wfMessage( 'ipbother' )->text() ] = 'other';
        }
 
        return $a;
    }
 
    public static function parseExpiryInput( $expiry ) {
        if ( wfIsInfinity( $expiry ) ) {
            return 'infinity';
        }
 
        $expiry = strtotime( $expiry );
 
        if ( $expiry < 0 || $expiry === false ) {
            return false;
        }
 
        return wfTimestamp( TS_MW, $expiry );
    }
 
    public static function canBlockEmail( UserIdentity $user ) {
        global $wgEnableUserEmail;
 
        return ( $wgEnableUserEmail && MediaWikiServices::getInstance()
                ->getPermissionManager()
                ->userHasRight( $user, 'blockemail' ) );
    }
 
    public static function checkUnblockSelf( $target, User $performer ) {
        return MediaWikiServices::getInstance()
            ->getBlockPermissionCheckerFactory()
            ->newBlockPermissionChecker( $target, $performer )
            ->checkBlockPermissions();
    }
 
    protected static function blockLogFlags( array $data, $type ) {
        $config = RequestContext::getMain()->getConfig();
 
        $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
 
        $flags = [];
 
        # when blocking a user the option 'anononly' is not available/has no effect
        # -> do not write this into log
        if ( !$data['HardBlock'] && $type != DatabaseBlock::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 == DatabaseBlock::TYPE_USER ) {
            // For grepping: message block-log-flags-noautoblock
            $flags[] = 'noautoblock';
        }
 
        if ( $data['DisableEmail'] ) {
            // For grepping: message block-log-flags-noemail
            $flags[] = 'noemail';
        }
 
        if ( $blockAllowsUTEdit && $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 );
    }
 
    public function onSubmit( array $data, HTMLForm $form = null ) {
        // If "Editing" checkbox is unchecked, the block must be a partial block affecting
        // actions other than editing, and there must be no restrictions.
        if ( isset( $data['Editing'] ) && $data['Editing'] === false ) {
            $data['EditingRestriction'] = 'partial';
            $data['PageRestrictions'] = '';
            $data['NamespaceRestrictions'] = '';
        }
        return self::processForm( $data, $form->getContext() );
    }
 
    public function onSuccess() {
        $out = $this->getOutput();
        $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
        $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
    }
 
    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';
    }
}