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[mediawiki.git] / includes / specials / SpecialBlock.php

<?php
/**
 * 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
 */

namespace MediaWiki\Specials;

use ErrorPageError;
use HtmlArmor;
use LogEventsList;
use MediaWiki\Block\BlockActionInfo;
use MediaWiki\Block\BlockPermissionCheckerFactory;
use MediaWiki\Block\BlockUser;
use MediaWiki\Block\BlockUserFactory;
use MediaWiki\Block\BlockUtils;
use MediaWiki\Block\DatabaseBlock;
use MediaWiki\Block\DatabaseBlockStore;
use MediaWiki\Block\Restriction\ActionRestriction;
use MediaWiki\Block\Restriction\NamespaceRestriction;
use MediaWiki\Block\Restriction\PageRestriction;
use MediaWiki\CommentStore\CommentStore;
use MediaWiki\Context\IContextSource;
use MediaWiki\Html\Html;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Language\Language;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\Page\PageReference;
use MediaWiki\Page\PageReferenceValue;
use MediaWiki\Permissions\Authority;
use MediaWiki\Request\WebRequest;
use MediaWiki\SpecialPage\FormSpecialPage;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use MediaWiki\Title\NamespaceInfo;
use MediaWiki\Title\Title;
use MediaWiki\Title\TitleFormatter;
use MediaWiki\User\User;
use MediaWiki\User\UserIdentity;
use MediaWiki\User\UserNamePrefixSearch;
use MediaWiki\User\UserNameUtils;
use OOUI\FieldLayout;
use OOUI\HtmlSnippet;
use OOUI\LabelWidget;
use OOUI\Widget;
use Wikimedia\IPUtils;
use Wikimedia\Message\MessageSpecifier;

/**
 * Allow users with 'block' user right to block IPs and user accounts from
 * editing pages and other actions.
 *
 * @ingroup SpecialPage
 */
class SpecialBlock extends FormSpecialPage {

        private BlockUtils $blockUtils;
        private BlockPermissionCheckerFactory $blockPermissionCheckerFactory;
        private BlockUserFactory $blockUserFactory;
        private DatabaseBlockStore $blockStore;
        private UserNameUtils $userNameUtils;
        private UserNamePrefixSearch $userNamePrefixSearch;
        private BlockActionInfo $blockActionInfo;
        private TitleFormatter $titleFormatter;

        /** @var UserIdentity|string|null User to be blocked, as passed either by parameter
         * (url?wpTarget=Foo) or as subpage (Special:Block/Foo)
         */
        protected $target;

        /** @var int DatabaseBlock::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 MessageSpecifier[]
         */
        protected $preErrors = [];

        /** @var bool */
        protected bool $useCodex = false;

        /** @var bool */
        protected bool $useMultiblocks = false;

        /**
         * @var array <mixed,mixed> An associative array used to pass vars to Codex form
         */
        protected array $codexFormData = [];

        private NamespaceInfo $namespaceInfo;

        /**
         * @param BlockUtils $blockUtils
         * @param BlockPermissionCheckerFactory $blockPermissionCheckerFactory
         * @param BlockUserFactory $blockUserFactory
         * @param DatabaseBlockStore $blockStore
         * @param UserNameUtils $userNameUtils
         * @param UserNamePrefixSearch $userNamePrefixSearch
         * @param BlockActionInfo $blockActionInfo
         * @param TitleFormatter $titleFormatter
         * @param NamespaceInfo $namespaceInfo
         */
        public function __construct(
                BlockUtils $blockUtils,
                BlockPermissionCheckerFactory $blockPermissionCheckerFactory,
                BlockUserFactory $blockUserFactory,
                DatabaseBlockStore $blockStore,
                UserNameUtils $userNameUtils,
                UserNamePrefixSearch $userNamePrefixSearch,
                BlockActionInfo $blockActionInfo,
                TitleFormatter $titleFormatter,
                NamespaceInfo $namespaceInfo
        ) {
                parent::__construct( 'Block', 'block' );

                $this->blockUtils = $blockUtils;
                $this->blockPermissionCheckerFactory = $blockPermissionCheckerFactory;
                $this->blockUserFactory = $blockUserFactory;
                $this->blockStore = $blockStore;
                $this->userNameUtils = $userNameUtils;
                $this->userNamePrefixSearch = $userNamePrefixSearch;
                $this->blockActionInfo = $blockActionInfo;
                $this->titleFormatter = $titleFormatter;
                $this->namespaceInfo = $namespaceInfo;
                $this->useCodex = $this->getConfig()->get( MainConfigNames::UseCodexSpecialBlock ) ||
                        $this->getRequest()->getBool( 'usecodex' );
                $this->useMultiblocks = $this->getConfig()->get( MainConfigNames::EnableMultiBlocks ) ||
                        $this->getRequest()->getBool( 'multiblocks' );
        }

        public function getDescription(): Message {
                return $this->msg( $this->useMultiblocks ? 'block-manage-blocks' : 'block' );
        }

        /**
         * @inheritDoc
         */
        public function execute( $par ) {
                parent::execute( $par );

                if ( $this->useCodex ) {
                        $this->codexFormData[ 'blockEnableMultiblocks' ] = $this->useMultiblocks;
                        $this->codexFormData[ 'blockTargetUser' ] = $this->target instanceof UserIdentity ?
                                $this->target->getName() :
                                $this->target ?? null;
                        $authority = $this->getAuthority();
                        $this->codexFormData[ 'blockShowSuppressLog' ] = $authority->isAllowed( 'suppressionlog' );
                        $this->codexFormData[ 'canDeleteLogEntry' ] = $authority->isAllowed( 'deletelogentry' );
                        $this->getOutput()->addJsConfigVars( $this->codexFormData );
                }
        }

        /**
         * @inheritDoc
         */
        public function doesWrites() {
                return true;
        }

        /**
         * Check 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 = $this->blockPermissionCheckerFactory
                        ->newBlockPermissionChecker( $this->target, $user )
                        ->checkBlockPermissions();
                if ( $status !== true ) {
                        throw new ErrorPageError( 'badaccess', $status );
                }
        }

        /**
         * We allow certain special cases where user is blocked
         *
         * @return bool
         */
        public function requiresUnblock() {
                return false;
        }

        /**
         * 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();
                [ $this->target, $this->type ] = $this->getTargetAndTypeInternal( $par, $request );
                if ( $this->target instanceof UserIdentity ) {
                        // Set the 'relevant user' in the skin, so it displays links like Contributions,
                        // User logs, UserRights, etc.
                        $this->getSkin()->setRelevantUser( $this->target );
                }

                [ $this->previousTarget, /*...*/ ] = $this->blockUtils
                        ->parseBlockTarget( $request->getVal( 'wpPreviousTarget' ) );
                $this->requestedHideUser = $request->getBool( 'wpHideUser' );

                if ( $this->useCodex ) {
                        // Parse wpExpiry param
                        $givenExpiry = $request->getVal( 'wpExpiry', '' );
                        if ( wfIsInfinity( $givenExpiry ) ) {
                                $this->codexFormData[ 'blockExpiryPreset' ] = 'infinite';
                        } else {
                                $expiry = date_parse( $givenExpiry );
                                $this->codexFormData[ 'blockExpiryPreset' ] = isset( $expiry[ 'relative' ] ) ?
                                        // Relative expiry (e.g. '1 week')
                                        $givenExpiry :
                                        // Absolute expiry, formatted for <input type="datetime-local">
                                        $this->formatExpiryForHtml( $request->getVal( 'wpExpiry', '' ) );
                        }

                        $this->codexFormData[ 'blockTypePreset' ] =
                                $request->getRawVal( 'wpEditingRestriction' ) === 'partial' ?
                                'partial' :
                                'sitewide';
                        $this->codexFormData[ 'blockReasonPreset' ] = $request->getVal( 'wpReason' );
                        $this->codexFormData[ 'blockReasonOtherPreset' ] = $request->getVal( 'wpReason-other' );
                        $blockAdditionalDetailsPreset = $blockDetailsPreset = [];

                        // Default is to always block account creation.
                        if ( $request->getBool( 'wpCreateAccount', true ) ) {
                                $blockDetailsPreset[] = 'wpCreateAccount';
                        }

                        if ( $request->getBool( 'wpDisableEmail' ) ) {
                                $blockDetailsPreset[] = 'wpDisableEmail';
                        }

                        if ( $request->getBool( 'wpDisableUTEdit' ) ) {
                                $blockDetailsPreset[] = 'wpDisableUTEdit';
                        }

                        if ( $request->getRawVal( 'wpAutoBlock' ) !== '0' ) {
                                $blockAdditionalDetailsPreset[] = 'wpAutoBlock';
                        }

                        if ( $request->getBool( 'wpWatch' ) ) {
                                $blockAdditionalDetailsPreset[] = 'wpWatch';
                        }

                        if ( $request->getBool( 'wpHideUser' ) ) {
                                $blockAdditionalDetailsPreset[] = 'wpHideUser';
                        }

                        if ( $request->getBool( 'wpHardBlock' ) ) {
                                $blockAdditionalDetailsPreset[] = 'wpHardBlock';
                        }

                        $this->codexFormData[ 'blockDetailsPreset' ] = $blockDetailsPreset;
                        $this->codexFormData[ 'blockAdditionalDetailsPreset' ] = $blockAdditionalDetailsPreset;
                        $this->codexFormData[ 'blockPageRestrictions' ] = $request->getVal( 'wpPageRestrictions' );
                        $this->codexFormData[ 'blockNamespaceRestrictions' ] = $request->getVal( 'wpNamespaceRestrictions' );
                }
        }

        /**
         * Customizes the HTMLForm a bit
         *
         * @param HTMLForm $form
         */
        protected function alterForm( HTMLForm $form ) {
                $form->setHeaderHtml( '' );
                $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 ) {
                        // Mimic error messages normally generated by the form
                        $form->addHeaderHtml( (string)new FieldLayout(
                                new Widget( [] ),
                                [
                                        'align' => 'top',
                                        'errors' => array_map( function ( $errMsg ) {
                                                return new HtmlSnippet( $this->msg( $errMsg )->parse() );
                                        }, $this->preErrors ),
                                ]
                        ) );

                        if ( $this->useCodex ) {
                                $this->codexFormData[ 'blockPreErrors' ] = array_map( function ( $errMsg ) {
                                        return $this->msg( $errMsg )->parse();
                                }, $this->preErrors );
                        }
                }
        }

        /**
         * @inheritDoc
         */
        protected function getDisplayFormat() {
                return $this->useCodex ? 'codex' : 'ooui';
        }

        /**
         * Get the HTMLForm descriptor array for the block form
         * @return array
         */
        protected function getFormFields() {
                $conf = $this->getConfig();
                $blockAllowsUTEdit = $conf->get( MainConfigNames::BlockAllowsUTEdit );

                $this->getOutput()->enableOOUI();

                $user = $this->getUser();

                $suggestedDurations = $this->getLanguage()->getBlockDurations();

                $a = [];

                $a['Target'] = [
                        'type' => 'user',
                        'ipallowed' => true,
                        'iprange' => true,
                        'id' => 'mw-bi-target',
                        'size' => '45',
                        'autofocus' => true,
                        'required' => true,
                        'placeholder' => $this->msg( 'block-target-placeholder' )->text(),
                        'validation-callback' => function ( $value, $alldata, $form ) {
                                $status = $this->blockUtils->validateTarget( $value );
                                if ( !$status->isOK() ) {
                                        $errors = $status->getMessages();
                                        return $form->msg( $errors[0] );
                                }
                                return true;
                        },
                        'section' => 'target',
                ];

                $editingRestrictionOptions = $this->useCodex ?
                        // If we're using Codex, use the option-descriptions feature, which is only supported by Codex
                        [
                                'options-messages' => [
                                        'ipb-sitewide' => 'sitewide',
                                        'ipb-partial' => 'partial'
                                ],
                                'option-descriptions-messages' => [
                                        'sitewide' => 'ipb-sitewide-help',
                                        'partial' => 'ipb-partial-help'
                                ],
                                'option-descriptions-messages-parse' => true,
                        ] :
                        // Otherwise, if we're using OOUI, add the options' descriptions as part of their labels
                        [
                                'options' => [
                                        $this->msg( 'ipb-sitewide' )->escaped() .
                                                new LabelWidget( [
                                                        'classes' => [ 'oo-ui-inline-help' ],
                                                        'label' => new HtmlSnippet( $this->msg( 'ipb-sitewide-help' )->parse() ),
                                                ] ) => 'sitewide',
                                        $this->msg( 'ipb-partial' )->escaped() .
                                                new LabelWidget( [
                                                        'classes' => [ 'oo-ui-inline-help' ],
                                                        'label' => new HtmlSnippet( $this->msg( 'ipb-partial-help' )->parse() ),
                                                ] ) => 'partial',
                                ]
                        ];

                $a['EditingRestriction'] = [
                        'type' => 'radio',
                        'cssclass' => 'mw-block-editing-restriction',
                        'default' => 'sitewide',
                        'section' => 'actions',
                ] + $editingRestrictionOptions;

                $a['PageRestrictions'] = [
                        'type' => 'titlesmultiselect',
                        'label' => $this->msg( 'ipb-pages-label' )->text(),
                        'exists' => true,
                        'max' => 10,
                        'cssclass' => 'mw-htmlform-checkradio-indent mw-block-partial-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-htmlform-checkradio-indent mw-block-partial-restriction',
                        'default' => '',
                        'input' => [
                                'autocomplete' => false
                        ],
                        'section' => 'actions',
                ];

                if ( $conf->get( MainConfigNames::EnablePartialActionBlocks ) ) {
                        $blockActions = $this->blockActionInfo->getAllBlockActions();
                        $optionMessages = array_combine(
                                array_map( static function ( $action ) {
                                        return "ipb-action-$action";
                                }, array_keys( $blockActions ) ),
                                $blockActions
                        );

                        $this->codexFormData[ 'partialBlockActionOptions'] = $optionMessages;

                        $a['ActionRestrictions'] = [
                                'type' => 'multiselect',
                                'cssclass' => 'mw-htmlform-checkradio-indent mw-block-partial-restriction mw-block-action-restriction',
                                'options-messages' => $optionMessages,
                                'section' => 'actions',
                        ];
                }

                $a['CreateAccount'] = [
                        'type' => 'check',
                        'cssclass' => 'mw-block-restriction',
                        'label-message' => 'ipbcreateaccount',
                        'default' => true,
                        'section' => 'details',
                ];

                if ( $this->blockPermissionCheckerFactory
                        ->newBlockPermissionChecker( null, $user )
                        ->checkEmailPermissions()
                ) {
                        $a['DisableEmail'] = [
                                'type' => 'check',
                                'cssclass' => 'mw-block-restriction',
                                'label-message' => 'ipbemailban',
                                'section' => 'details',
                        ];

                        $this->codexFormData[ 'blockDisableEmailVisible'] = true;
                }

                if ( $blockAllowsUTEdit ) {
                        $a['DisableUTEdit'] = [
                                'type' => 'check',
                                'cssclass' => 'mw-block-restriction',
                                'label-message' => 'ipb-disableusertalk',
                                'default' => false,
                                'section' => 'details',
                        ];

                        $this->codexFormData[ 'blockDisableUTEditVisible'] = true;
                }

                $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',
                ];
                $this->codexFormData[ 'blockExpiryOptions' ] = $suggestedDurations;
                $this->codexFormData[ 'blockExpiryDefault' ] = $defaultExpiry->text();

                $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',
                        'help-message' => 'block-reason-help',
                ];

                if ( $this->useCodex ) {
                        $blockReasonOptions = Html::listDropdownOptionsCodex(
                                Html::listDropdownOptions( $this->msg( 'ipbreason-dropdown' )->plain(),
                                        [ 'other' => $this->msg( 'htmlform-selectorother-other' )->text() ]
                        ) );
                        $this->codexFormData[ 'blockReasonOptions' ] = $blockReasonOptions;
                        $this->codexFormData[ 'blockReasonMaxLength' ] = CommentStore::COMMENT_CHARACTER_LIMIT;
                }

                $a['AutoBlock'] = [
                        'type' => 'check',
                        'label-message' => [
                                'ipbenableautoblock',
                                Message::durationParam( $conf->get( MainConfigNames::AutoblockExpiry ) )
                        ],
                        'default' => true,
                        'section' => 'options',
                ];
                $this->codexFormData['blockAutoblockExpiry'] = $this->getLanguage()
                        ->formatDuration( $conf->get( MainConfigNames::AutoblockExpiry ) );

                // Allow some users to hide name from block log, blocklist and listusers
                if ( $this->getAuthority()->isAllowed( 'hideuser' ) ) {
                        $a['HideUser'] = [
                                'type' => 'check',
                                'label-message' => 'ipbhidename',
                                'cssclass' => 'mw-block-hideuser',
                                'section' => 'options',
                        ];

                        $this->codexFormData['blockHideUser'] = true;
                }

                // Watchlist their user page? (Only if user is logged in)
                if ( $user->isRegistered() ) {
                        $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;
        }

        /**
         * 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 &$fields HTMLForm descriptor array
         */
        protected function maybeAlterFormDefaults( &$fields ) {
                // This will be overwritten by request data
                $fields['Target']['default'] = (string)$this->target;

                if ( $this->target ) {
                        $status = $this->blockUtils->validateTarget( $this->target );
                        if ( !$status->isOK() ) {
                                $errors = $status->getMessages( 'error' );
                                $this->preErrors = array_merge( $this->preErrors, $errors );
                        }
                }

                // This won't be
                $fields['PreviousTarget']['default'] = (string)$this->target;

                $block = $this->blockStore->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
                                || ( $this->target && $block->isBlocking( $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 (bl_deleted == 1), don't show the reason
                        // unless this user also has rights to hideuser: T37839
                        if ( !$block->getHideName() || $this->getAuthority()->isAllowed( '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'] = $this->codexFormData[ 'blockExpiryDefault' ] = 'infinite';
                        } else {
                                $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->getExpiry() );

                                // Don't overwrite if expiry was specified in the URL
                                if ( !isset( $this->codexFormData[ 'blockExpiryPreset' ] ) ) {
                                        $this->codexFormData[ 'blockExpiryPreset' ] = $this->formatExpiryForHtml( $block->getExpiry() );
                                }
                        }

                        if ( !$block->isSitewide() ) {
                                $fields['EditingRestriction']['default'] =
                                        $this->codexFormData[ 'blockTypePreset' ] = 'partial';

                                $pageRestrictions = [];
                                $namespaceRestrictions = [];
                                foreach ( $block->getRestrictions() as $restriction ) {
                                        if ( $restriction instanceof PageRestriction && $restriction->getTitle() ) {
                                                $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
                                        } elseif ( $restriction instanceof NamespaceRestriction &&
                                                $this->namespaceInfo->exists( $restriction->getValue() )
                                        ) {
                                                $namespaceRestrictions[] = $restriction->getValue();
                                        }
                                }

                                // Sort the restrictions so they are in alphabetical order.
                                sort( $pageRestrictions );
                                $fields['PageRestrictions']['default'] =
                                        $this->codexFormData[ 'blockPageRestrictions' ] = implode( "\n", $pageRestrictions );
                                sort( $namespaceRestrictions );
                                $fields['NamespaceRestrictions']['default'] =
                                        $this->codexFormData[ 'blockNamespaceRestrictions' ] = implode( "\n", $namespaceRestrictions );

                                if ( $this->getConfig()->get( MainConfigNames::EnablePartialActionBlocks ) ) {
                                        $actionRestrictions = [];
                                        foreach ( $block->getRestrictions() as $restriction ) {
                                                if ( $restriction instanceof ActionRestriction ) {
                                                        $actionRestrictions[] = $restriction->getValue();
                                                }
                                        }
                                        $fields['ActionRestrictions']['default'] = $actionRestrictions;
                                }
                        }

                        $this->alreadyBlocked = true;
                        $this->codexFormData[ 'blockAlreadyBlocked' ] = $this->alreadyBlocked;
                        $this->preErrors[] = $this->msg( 'ipb-needreblock', wfEscapeWikiText( $block->getTargetName() ) );
                }

                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 && $this->getAuthority()->isAllowed( 'hideuser' ) ) {
                        $fields['Confirm']['type'] = 'check';
                        unset( $fields['Confirm']['default'] );
                        $this->preErrors[] = $this->msg( '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[] = $this->msg( 'ipb-blockingself', 'ipb-confirmaction' );
                }
        }

        /**
         * Format a date string for use by <input type="datetime-local">
         *
         * @param string $expiry
         * @return string Formatted as YYYY-MM-DDTHH:mm
         */
        private function formatExpiryForHtml( string $expiry ): string {
                if ( preg_match( '/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/', $expiry ) === 1 ) {
                        // YYYY-MM-DDTHH:mm which is accepted by <input type="datetime-local">, but not by MediaWiki.
                        return substr( $expiry, 0, 16 );
                } elseif ( $expiry === '' ) {
                        // No expiry specified
                        return '';
                }
                return substr( wfTimestamp( TS_ISO_8601, $expiry ), 0, 16 );
        }

        /**
         * Add header elements like block log entries, etc.
         * @return string
         */
        protected function preHtml() {
                $this->getOutput()->addModuleStyles( [ 'mediawiki.special' ] );
                if ( $this->useCodex ) {
                        $this->getOutput()->addModules( [ 'mediawiki.special.block.codex' ] );
                } else {
                        $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
                }

                $blockCIDRLimit = $this->getConfig()->get( MainConfigNames::BlockCIDRLimit );
                $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();

                $otherBlockMessages = [];
                if ( $this->target !== null ) {
                        $targetName = $this->target;
                        if ( $this->target instanceof UserIdentity ) {
                                $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;
        }

        /**
         * Add footer elements to the form
         * @return string
         */
        protected function postHtml() {
                $links = [];

                $this->getOutput()->addModuleStyles( 'mediawiki.special' );

                $linkRenderer = $this->getLinkRenderer();
                // Link to the user's contributions, if applicable
                if ( $this->target instanceof UserIdentity ) {
                        $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 UserIdentity ) {
                        $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()
                );

                // Link to edit the block dropdown reasons, if applicable
                if ( $this->getAuthority()->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 )
                );

                $userPage = self::getTargetUserTitle( $this->target );
                if ( $userPage ) {
                        // Get relevant extracts from the block and suppression logs, if possible
                        $out = '';

                        LogEventsList::showLogExtract(
                                $out,
                                'block',
                                $userPage,
                                '',
                                [
                                        'lim' => 10,
                                        'msgKey' => [
                                                'blocklog-showlog',
                                                $this->titleFormatter->getText( $userPage ),
                                        ],
                                        'showIfEmpty' => false
                                ]
                        );
                        $text .= $out;

                        // Add suppression block entries if allowed
                        if ( $this->getAuthority()->isAllowed( 'suppressionlog' ) ) {
                                LogEventsList::showLogExtract(
                                        $out,
                                        'suppress',
                                        $userPage,
                                        '',
                                        [
                                                'lim' => 10,
                                                'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
                                                'msgKey' => [
                                                        'blocklog-showsuppresslog',
                                                        $this->titleFormatter->getText( $userPage ),
                                                ],
                                                'showIfEmpty' => false
                                        ]
                                );

                                $text .= $out;
                        }
                }

                return $text;
        }

        /**
         * Get a user page target for things like logs.
         * This handles account and IP range targets.
         * @param UserIdentity|string|null $target
         * @return PageReference|null
         */
        protected static function getTargetUserTitle( $target ): ?PageReference {
                if ( $target instanceof UserIdentity ) {
                        return PageReferenceValue::localReference( NS_USER, $target->getName() );
                }

                if ( is_string( $target ) && IPUtils::isIPAddress( $target ) ) {
                        return PageReferenceValue::localReference( NS_USER, $target );
                }

                return null;
        }

        /**
         * Get the target and type, given the request and the subpage parameter.
         * Several parameters are handled for backwards compatability. 'wpTarget' is
         * prioritized, since it matches the HTML form.
         *
         * @param string|null $par Subpage parameter passed to setup, or data value from
         *  the HTMLForm
         * @param WebRequest $request Try and get data from a request too
         * @return array [ UserIdentity|string|null, DatabaseBlock::TYPE_ constant|null ]
         * @phan-return array{0:UserIdentity|string|null,1:int|null}
         */
        private function getTargetAndTypeInternal( ?string $par, WebRequest $request ) {
                $possibleTargets = [
                        $request->getVal( 'wpTarget', null ),
                        $par,
                        $request->getVal( 'ip', null ),
                        // B/C @since 1.18
                        $request->getVal( 'wpBlockAddress', null ),
                ];
                foreach ( $possibleTargets as $possibleTarget ) {
                        $targetAndType = $this->blockUtils
                                ->parseBlockTarget( $possibleTarget );
                        // If type is not null then target is valid
                        if ( $targetAndType[ 1 ] !== null ) {
                                break;
                        }
                }
                return $targetAndType;
        }

        /**
         * Given the form data, actually implement a block.
         *
         * @deprecated since 1.36, use BlockUserFactory service instead,
         *     hard-deprecated since 1.43
         * @param array $data
         * @param IContextSource $context
         * @return bool|string|array|Status
         */
        public static function processForm( array $data, IContextSource $context ) {
                wfDeprecated( __METHOD__, '1.36' );
                $services = MediaWikiServices::getInstance();
                return self::processFormInternal(
                        $data,
                        $context->getAuthority(),
                        $services->getBlockUserFactory(),
                        $services->getBlockUtils()
                );
        }

        /**
         * Implementation details for processForm
         * Own function to allow sharing the deprecated code with non-deprecated and service code
         *
         * @param array $data
         * @param Authority $performer
         * @param BlockUserFactory $blockUserFactory
         * @param BlockUtils $blockUtils
         * @return bool|string|array|Status
         */
        private static function processFormInternal(
                array $data,
                Authority $performer,
                BlockUserFactory $blockUserFactory,
                BlockUtils $blockUtils
        ) {
                // Temporarily access service container until the feature flag is removed: T280532
                $enablePartialActionBlocks = MediaWikiServices::getInstance()
                        ->getMainConfig()->get( MainConfigNames::EnablePartialActionBlocks );

                $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 );

                // 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;
                }

                /** @var User $target */
                [ $target, $type ] = $blockUtils->parseBlockTarget( $data['Target'] );
                if ( $type == DatabaseBlock::TYPE_USER ) {
                        $target = $target->getName();

                        // 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->getUser()->getName() &&
                                ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
                        ) {
                                return [ 'ipb-blockingself', 'ipb-confirmaction' ];
                        }

                        if ( $data['HideUser'] && !$data['Confirm'] ) {
                                return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
                        }
                } elseif ( $type == DatabaseBlock::TYPE_IP ) {
                        $target = $target->getName();
                } elseif ( $type != DatabaseBlock::TYPE_RANGE ) {
                        // 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
                $blockReason = $data['Reason'][0] ?? '';

                $pageRestrictions = [];
                $namespaceRestrictions = [];
                $actionRestrictions = [];
                if ( $isPartialBlock ) {
                        if ( isset( $data['PageRestrictions'] ) && $data['PageRestrictions'] !== '' ) {
                                $titles = explode( "\n", $data['PageRestrictions'] );
                                foreach ( $titles as $title ) {
                                        $pageRestrictions[] = PageRestriction::newFromTitle( $title );
                                }
                        }
                        if ( isset( $data['NamespaceRestrictions'] ) && $data['NamespaceRestrictions'] !== '' ) {
                                $namespaceRestrictions = array_map( static function ( $id ) {
                                        return new NamespaceRestriction( 0, (int)$id );
                                }, explode( "\n", $data['NamespaceRestrictions'] ) );
                        }
                        if (
                                $enablePartialActionBlocks &&
                                isset( $data['ActionRestrictions'] ) &&
                                $data['ActionRestrictions'] !== ''
                        ) {
                                $actionRestrictions = array_map( static function ( $id ) {
                                        return new ActionRestriction( 0, $id );
                                }, $data['ActionRestrictions'] );
                        }
                }
                $restrictions = array_merge( $pageRestrictions, $namespaceRestrictions, $actionRestrictions );

                if ( !isset( $data['Tags'] ) ) {
                        $data['Tags'] = [];
                }

                $blockOptions = [
                        'isCreateAccountBlocked' => $data['CreateAccount'],
                        'isHardBlock' => $data['HardBlock'],
                        'isAutoblocking' => $data['AutoBlock'],
                        'isHideUser' => $data['HideUser'],
                        'isPartial' => $isPartialBlock,
                ];

                if ( isset( $data['DisableUTEdit'] ) ) {
                        $blockOptions['isUserTalkEditBlocked'] = $data['DisableUTEdit'];
                }
                if ( isset( $data['DisableEmail'] ) ) {
                        $blockOptions['isEmailBlocked'] = $data['DisableEmail'];
                }

                $blockUser = $blockUserFactory->newBlockUser(
                        $target,
                        $performer,
                        $data['Expiry'],
                        $blockReason,
                        $blockOptions,
                        $restrictions,
                        $data['Tags']
                );

                // 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'] );

                $doReblock = !$blockNotConfirmed && !$reblockNotAllowed;

                $status = $blockUser->placeBlock( $doReblock );
                if ( !$status->isOK() ) {
                        return $status;
                }

                if (
                        // Can't watch a range block
                        $type != DatabaseBlock::TYPE_RANGE

                        // Technically a wiki can be configured to allow anonymous users to place blocks,
                        // in which case the 'Watch' field isn't included in the form shown, and we should
                        // not try to access it.
                        && array_key_exists( 'Watch', $data )
                        && $data['Watch']
                ) {
                        MediaWikiServices::getInstance()->getWatchlistManager()->addWatchIgnoringRights(
                                $performer->getUser(),
                                Title::makeTitle( NS_USER, $target )
                        );
                }

                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?
         * @deprecated since 1.42, use Language::getBlockDurations() instead,
         *     hard-deprecated since 1.43
         * @param Language|null $lang The language to get the durations in, or null to use
         *     the wiki's content language
         * @param bool $includeOther Whether to include the 'other' option in the list of
         *     suggestions
         * @return string[]
         */
        public static function getSuggestedDurations( ?Language $lang = null, $includeOther = true ) {
                wfDeprecated( __METHOD__, '1.42' );
                $lang ??= MediaWikiServices::getInstance()->getContentLanguage();
                return $lang->getBlockDurations( $includeOther );
        }

        /**
         * 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.
         *
         * @deprecated since 1.36, use BlockUser::parseExpiryInput instead,
         *     hard-deprecated since 1.43
         *
         * @param string $expiry Whatever was typed into the form
         * @return string|bool Timestamp or 'infinity' or false on error.
         */
        public static function parseExpiryInput( $expiry ) {
                wfDeprecated( __METHOD__, '1.36' );
                return BlockUser::parseExpiryInput( $expiry );
        }

        /**
         * Can we do an email block?
         *
         * @deprecated since 1.36, use BlockPermissionChecker service instead,
         *     hard-deprecated since 1.43
         * @param UserIdentity $user The sysop wanting to make a block
         * @return bool
         */
        public static function canBlockEmail( UserIdentity $user ) {
                wfDeprecated( __METHOD__, '1.36' );
                return MediaWikiServices::getInstance()
                        ->getBlockPermissionCheckerFactory()
                        ->newBlockPermissionChecker( null, User::newFromIdentity( $user ) )
                        ->checkEmailPermissions();
        }

        /**
         * Process the form on POST submission.
         * @param array $data
         * @param HTMLForm|null $form
         * @return bool|string|array|Status As documented for HTMLForm::trySubmit.
         */
        public function onSubmit( array $data, ?HTMLForm $form = null ) {
                return self::processFormInternal(
                        $data,
                        $this->getAuthority(),
                        $this->blockUserFactory,
                        $this->blockUtils
                );
        }

        /**
         * Do something exciting on successful processing of the form, most likely to show a
         * confirmation message
         */
        public function onSuccess() {
                $out = $this->getOutput();
                $out->setPageTitleMsg( $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 ) {
                $search = $this->userNameUtils->getCanonical( $search );
                if ( !$search ) {
                        // No prefix suggestion for invalid user
                        return [];
                }
                // Autocomplete subpage as user list - public to allow caching
                return $this->userNamePrefixSearch
                        ->search( UserNamePrefixSearch::AUDIENCE_PUBLIC, $search, $limit, $offset );
        }

        /**
         * @inheritDoc
         */
        protected function getGroupName() {
                return 'users';
        }
}

/** @deprecated class alias since 1.41 */
class_alias( SpecialBlock::class, 'SpecialBlock' );