ProtectionForm.php

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<?php
namespace MediaWiki\Page;
 
use InvalidArgumentException;
use MediaWiki\CommentStore\CommentStore;
use MediaWiki\Context\IContextSource;
use MediaWiki\Exception\ErrorPageError;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Language\Language;
use MediaWiki\Logging\LogEventsList;
use MediaWiki\Logging\LogPage;
use MediaWiki\MediaWikiServices;
use MediaWiki\Output\OutputPage;
use MediaWiki\Permissions\Authority;
use MediaWiki\Permissions\PermissionManager;
use MediaWiki\Permissions\PermissionStatus;
use MediaWiki\Permissions\RestrictionStore;
use MediaWiki\Request\WebRequest;
use MediaWiki\Title\Title;
use MediaWiki\Title\TitleFormatter;
use MediaWiki\Watchlist\WatchlistManager;
use MediaWiki\Xml\XmlSelect;
use Wikimedia\ParamValidator\TypeDef\ExpiryDef;
use Wikimedia\Timestamp\TimestampFormat as TS;
 
class ProtectionForm {
    protected $mRestrictions = [];
 
    protected $mReason = '';
 
    protected $mReasonSelection = '';
 
    protected $mCascade = false;
 
    protected $mExpiry = [];
 
    protected $mExpirySelection = [];
 
    protected $mPermStatus;
 
    protected $mApplicableTypes = [];
 
    protected $mExistingExpiry = [];
 
    protected Article $mArticle;
    protected Title $mTitle;
    protected bool $disabled;
    protected array $disabledAttrib;
    private IContextSource $mContext;
    private WebRequest $mRequest;
    private Authority $mPerformer;
    private Language $mLang;
    private OutputPage $mOut;
    private PermissionManager $permManager;
    private HookRunner $hookRunner;
    private WatchlistManager $watchlistManager;
    private TitleFormatter $titleFormatter;
    private RestrictionStore $restrictionStore;
 
    public function __construct( Article $article ) {
        // Set instance variables.
        $this->mArticle = $article;
        $this->mTitle = $article->getTitle();
        $this->mContext = $article->getContext();
        $this->mRequest = $this->mContext->getRequest();
        $this->mPerformer = $this->mContext->getAuthority();
        $this->mOut = $this->mContext->getOutput();
        $this->mLang = $this->mContext->getLanguage();
 
        $services = MediaWikiServices::getInstance();
        $this->permManager = $services->getPermissionManager();
        $this->hookRunner = new HookRunner( $services->getHookContainer() );
        $this->watchlistManager = $services->getWatchlistManager();
        $this->titleFormatter = $services->getTitleFormatter();
        $this->restrictionStore = $services->getRestrictionStore();
        $this->mApplicableTypes = $this->restrictionStore->listApplicableRestrictionTypes( $this->mTitle );
 
        // Check if the form should be disabled.
        // If it is, the form will be available in read-only to show levels.
        $this->mPermStatus = PermissionStatus::newEmpty();
        if ( $this->mRequest->wasPosted() ) {
            $this->mPerformer->authorizeWrite( 'protect', $this->mTitle, $this->mPermStatus );
        } else {
            $this->mPerformer->authorizeRead( 'protect', $this->mTitle, $this->mPermStatus );
        }
        $readOnlyMode = $services->getReadOnlyMode();
        if ( $readOnlyMode->isReadOnly() ) {
            $this->mPermStatus->fatal( 'readonlytext', $readOnlyMode->getReason() );
        }
        $this->disabled = !$this->mPermStatus->isGood();
        $this->disabledAttrib = $this->disabled ? [ 'disabled' => 'disabled' ] : [];
 
        $this->loadData();
    }
 
    private function loadData() {
        $levels = $this->permManager->getNamespaceRestrictionLevels(
            $this->mTitle->getNamespace(), $this->mPerformer->getUser()
        );
 
        $this->mCascade = $this->restrictionStore->areRestrictionsCascading( $this->mTitle );
        $this->mReason = $this->mRequest->getText( 'mwProtect-reason' );
        $this->mReasonSelection = $this->mRequest->getText( 'wpProtectReasonSelection' );
        $this->mCascade = $this->mRequest->getBool( 'mwProtect-cascade', $this->mCascade );
 
        foreach ( $this->mApplicableTypes as $action ) {
            // @todo FIXME: This form currently requires individual selections,
            // but the db allows multiples separated by commas.
 
            // Pull the actual restriction from the DB
            $this->mRestrictions[$action] = implode( '',
                $this->restrictionStore->getRestrictions( $this->mTitle, $action ) );
 
            if ( !$this->mRestrictions[$action] ) {
                // No existing expiry
                $existingExpiry = '';
            } else {
                $existingExpiry = $this->restrictionStore->getRestrictionExpiry( $this->mTitle, $action );
            }
            $this->mExistingExpiry[$action] = $existingExpiry;
 
            $requestExpiry = $this->mRequest->getText( "mwProtect-expiry-$action" );
            $requestExpirySelection = $this->mRequest->getVal( "wpProtectExpirySelection-$action" );
 
            if ( $requestExpiry ) {
                // Custom expiry takes precedence
                $this->mExpiry[$action] = $requestExpiry;
                $this->mExpirySelection[$action] = 'othertime';
            } elseif ( $requestExpirySelection ) {
                // Expiry selected from list
                $this->mExpiry[$action] = '';
                $this->mExpirySelection[$action] = $requestExpirySelection;
            } elseif ( $existingExpiry ) {
                // Use existing expiry in its own list item
                $this->mExpiry[$action] = '';
                $this->mExpirySelection[$action] = $existingExpiry;
            } else {
                // Catches 'infinity' - Existing expiry is infinite, use "infinite" in drop-down
                // Final default: infinite
                $this->mExpiry[$action] = '';
                $this->mExpirySelection[$action] = 'infinite';
            }
 
            $val = $this->mRequest->getVal( "mwProtect-level-$action" );
            if ( $val !== null && in_array( $val, $levels ) ) {
                $this->mRestrictions[$action] = $val;
            }
        }
    }
 
    private function getExpiry( $action ) {
        if ( $this->mExpirySelection[$action] == 'existing' ) {
            return $this->mExistingExpiry[$action];
        } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
            $value = $this->mExpiry[$action];
        } else {
            $value = $this->mExpirySelection[$action];
        }
        try {
            return ExpiryDef::normalizeExpiry( $value, TS::MW );
        } catch ( InvalidArgumentException ) {
            return false;
        }
    }
 
    public function execute() {
        if (
            $this->permManager->getNamespaceRestrictionLevels(
                $this->mTitle->getNamespace()
            ) === [ '' ]
        ) {
            throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
        }
 
        if ( $this->mRequest->wasPosted() ) {
            if ( $this->save() ) {
                $q = $this->mArticle->getPage()->isRedirect() ? 'redirect=no' : '';
                $this->mOut->redirect( $this->mTitle->getFullURL( $q ) );
            }
        } else {
            $this->show();
        }
    }
 
    private function show( $err = null ) {
        $out = $this->mOut;
        $out->setRobotPolicy( 'noindex,nofollow' );
        $out->addBacklinkSubtitle( $this->mTitle );
 
        if ( is_array( $err ) ) {
            $out->addHTML( Html::errorBox( $out->msg( ...$err )->parse() ) );
        } elseif ( is_string( $err ) ) {
            $out->addHTML( Html::errorBox( $err ) );
        }
 
        if ( $this->mApplicableTypes === [] ) {
            // No restriction types available for the current title
            // this might happen if an extension alters the available types
            $out->setPageTitleMsg( $this->mContext->msg(
                'protect-norestrictiontypes-title'
            )->plaintextParams(
                $this->mTitle->getPrefixedText()
            ) );
            $out->addWikiTextAsInterface(
                $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain()
            );
 
            // Show the log in case protection was possible once
            $this->showLogExtract();
            // return as there isn't anything else we can do
            return;
        }
 
        [ $cascadeSources, /* $restrictions */ ] =
            $this->restrictionStore->getCascadeProtectionSources( $this->mTitle );
        if ( count( $cascadeSources ) > 0 ) {
            $titles = '';
 
            foreach ( $cascadeSources as $pageIdentity ) {
                $titles .= '* [[:' . $this->titleFormatter->getPrefixedText( $pageIdentity ) . "]]\n";
            }
 
            $out->wrapWikiMsg(
                "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
                [ 'protect-cascadeon', count( $cascadeSources ) ]
            );
        }
 
        # Show an appropriate message if the user isn't allowed or able to change
        # the protection settings at this time
        if ( $this->disabled ) {
            $out->setPageTitleMsg(
                $this->mContext->msg( 'protect-title-notallowed' )->plaintextParams( $this->mTitle->getPrefixedText() )
            );
            $out->addWikiTextAsInterface(
                $out->formatPermissionStatus( $this->mPermStatus, 'protect' )
            );
        } else {
            $out->setPageTitleMsg(
                $this->mContext->msg( 'protect-title' )->plaintextParams( $this->mTitle->getPrefixedText() )
            );
            $out->addWikiMsg( 'protect-text',
                wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
        }
 
        $out->addHTML( $this->buildForm() );
        $this->showLogExtract();
    }
 
    private function save() {
        # Permission check!
        if ( $this->disabled ) {
            $this->show();
            return false;
        }
 
        $token = $this->mRequest->getVal( 'wpEditToken' );
        $legacyUser = MediaWikiServices::getInstance()
            ->getUserFactory()
            ->newFromAuthority( $this->mPerformer );
        if ( !$legacyUser->matchEditToken( $token, [ 'protect', $this->mTitle->getPrefixedDBkey() ] ) ) {
            $this->show( [ 'sessionfailure' ] );
            return false;
        }
 
        # Create reason string. Use list and/or custom string.
        $reasonstr = $this->mReasonSelection;
        if ( $reasonstr != 'other' && $this->mReason != '' ) {
            // Entry from drop down menu + additional comment
            $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
        } elseif ( $reasonstr == 'other' ) {
            $reasonstr = $this->mReason;
        }
 
        $expiry = [];
        foreach ( $this->mApplicableTypes as $action ) {
            $expiry[$action] = $this->getExpiry( $action );
            if ( empty( $this->mRestrictions[$action] ) ) {
                // unprotected
                continue;
            }
            if ( !$expiry[$action] ) {
                $this->show( [ 'protect_expiry_invalid' ] );
                return false;
            }
            if ( $expiry[$action] < wfTimestampNow() ) {
                $this->show( [ 'protect_expiry_old' ] );
                return false;
            }
        }
 
        $this->mCascade = $this->mRequest->getBool( 'mwProtect-cascade' );
 
        $status = $this->mArticle->getPage()->doUpdateRestrictions(
            $this->mRestrictions,
            $expiry,
            $this->mCascade,
            $reasonstr,
            $this->mPerformer->getUser()
        );
 
        if ( !$status->isOK() ) {
            $this->show( $this->mOut->parseInlineAsInterface(
                $status->getWikiText( false, false, $this->mLang )
            ) );
            return false;
        }
 
        $errorMsg = '';
        if ( !$this->hookRunner->onProtectionForm__save( $this->mArticle, $errorMsg, $reasonstr ) ) {
            if ( $errorMsg == '' ) {
                $errorMsg = [ 'hookaborted' ];
            }
        }
        if ( $errorMsg != '' ) {
            $this->show( $errorMsg );
            return false;
        }
 
        $this->watchlistManager->setWatch(
            $this->mRequest->getCheck( 'mwProtectWatch' ),
            $this->mPerformer,
            $this->mTitle
        );
 
        return true;
    }
 
    private function buildForm() {
        $this->mOut->enableOOUI();
        $out = '';
        $fields = [];
        if ( !$this->disabled ) {
            $this->mOut->addModules( 'mediawiki.action.protect' );
            $this->mOut->addModuleStyles( 'mediawiki.action.styles' );
        }
        $scExpiryOptions = $this->mContext->msg( 'protect-expiry-options' )->inContentLanguage()->text();
        $levels = $this->permManager->getNamespaceRestrictionLevels(
            $this->mTitle->getNamespace(),
            $this->disabled ? null : $this->mPerformer->getUser()
        );
 
        // Not all languages have V_x <-> N_x relation
        foreach ( $this->mRestrictions as $action => $selected ) {
            // Messages:
            // restriction-edit, restriction-move, restriction-create, restriction-upload
            $section = 'restriction-' . $action;
            $id = 'mwProtect-level-' . $action;
            $options = [];
            foreach ( $levels as $key ) {
                $options[$this->getOptionLabel( $key )] = $key;
            }
 
            $fields[$id] = [
                'type' => 'select',
                'name' => $id,
                'default' => $selected,
                'id' => $id,
                'size' => count( $levels ),
                'options' => $options,
                'disabled' => $this->disabled,
                'section' => $section,
            ];
 
            $expiryOptions = [];
 
            if ( $this->mExistingExpiry[$action] ) {
                if ( $this->mExistingExpiry[$action] == 'infinity' ) {
                    $existingExpiryMessage = $this->mContext->msg( 'protect-existing-expiry-infinity' );
                } else {
                    $existingExpiryMessage = $this->mContext->msg( 'protect-existing-expiry' )
                        ->dateTimeParams( $this->mExistingExpiry[$action] )
                        ->dateParams( $this->mExistingExpiry[$action] )
                        ->timeParams( $this->mExistingExpiry[$action] );
                }
                $expiryOptions[$existingExpiryMessage->text()] = 'existing';
            }
 
            $expiryOptions[$this->mContext->msg( 'protect-othertime-op' )->text()] = 'othertime';
 
            $expiryOptions = array_merge( $expiryOptions, XmlSelect::parseOptionsMessage( $scExpiryOptions ) );
 
            # Add expiry dropdown
            $fields["wpProtectExpirySelection-$action"] = [
                'type' => 'select',
                'name' => "wpProtectExpirySelection-$action",
                'id' => "mwProtectExpirySelection-$action",
                'tabindex' => '2',
                'disabled' => $this->disabled,
                'label' => $this->mContext->msg( 'protectexpiry' )->text(),
                'options' => $expiryOptions,
                'default' => $this->mExpirySelection[$action],
                'section' => $section,
            ];
 
            # Add custom expiry field
            if ( !$this->disabled ) {
                $fields["mwProtect-expiry-$action"] = [
                    'type' => 'text',
                    'label' => $this->mContext->msg( 'protect-othertime' )->text(),
                    'name' => "mwProtect-expiry-$action",
                    'id' => "mwProtect-$action-expires",
                    'size' => 50,
                    'default' => $this->mExpiry[$action],
                    'disabled' => $this->disabled,
                    'section' => $section,
                ];
            }
        }
 
        # Give extensions a chance to add items to the form
        $hookFormRaw = '';
        $hookFormOptions = [];
 
        $this->hookRunner->onProtectionForm__buildForm( $this->mArticle, $hookFormRaw );
        $this->hookRunner->onProtectionFormAddFormFields( $this->mArticle, $hookFormOptions );
 
        # Merge forms added from addFormFields
        $fields = array_merge( $fields, $hookFormOptions );
 
        # Add raw sections added in buildForm
        if ( $hookFormRaw ) {
            $fields['rawinfo'] = [
                'type' => 'info',
                'default' => $hookFormRaw,
                'raw' => true,
                'section' => 'restriction-blank'
            ];
        }
 
        # JavaScript will add another row with a value-chaining checkbox
        if ( $this->mTitle->exists() ) {
            $fields['mwProtect-cascade'] = [
                'type' => 'check',
                'label' => $this->mContext->msg( 'protect-cascade' )->text(),
                'id' => 'mwProtect-cascade',
                'name' => 'mwProtect-cascade',
                'default' => $this->mCascade,
                'disabled' => $this->disabled,
            ];
        }
 
        # Add manual and custom reason field/selects as well as submit
        if ( !$this->disabled ) {
            // 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.
            // Subtract arbitrary 75 to leave some space for the autogenerated null edit's summary
            // and other texts chosen by dropdown menus on this page.
            $maxlength = CommentStore::COMMENT_CHARACTER_LIMIT - 75;
            $fields['wpProtectReasonSelection'] = [
                'type' => 'select',
                'cssclass' => 'mwProtect-reason',
                'label' => $this->mContext->msg( 'protectcomment' )->text(),
                'tabindex' => 4,
                'id' => 'wpProtectReasonSelection',
                'name' => 'wpProtectReasonSelection',
                'flatlist' => true,
                'options' => Html::listDropdownOptions(
                    $this->mContext->msg( 'protect-dropdown' )->inContentLanguage()->text(),
                    [ 'other' => $this->mContext->msg( 'protect-otherreason-op' )->text() ]
                ),
                'default' => $this->mReasonSelection,
            ];
            $fields['mwProtect-reason'] = [
                'type' => 'text',
                'id' => 'mwProtect-reason',
                'label' => $this->mContext->msg( 'protect-otherreason' )->text(),
                'name' => 'mwProtect-reason',
                'size' => 60,
                'maxlength' => $maxlength,
                'default' => $this->mReason,
            ];
            # Disallow watching if user is not logged in
            if ( $this->mPerformer->getUser()->isRegistered() ) {
                $fields['mwProtectWatch'] = [
                    'type' => 'check',
                    'id' => 'mwProtectWatch',
                    'label' => $this->mContext->msg( 'watchthis' )->text(),
                    'name' => 'mwProtectWatch',
                    'default' => (
                        $this->watchlistManager->isWatched( $this->mPerformer, $this->mTitle )
                        || MediaWikiServices::getInstance()->getUserOptionsLookup()->getOption(
                            $this->mPerformer->getUser(),
                            'watchdefault'
                        )
                    ),
                ];
            }
        }
 
        if ( $this->mPerformer->isAllowed( 'editinterface' ) ) {
            $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
            $link = $linkRenderer->makeKnownLink(
                $this->mContext->msg( 'protect-dropdown' )->inContentLanguage()->getTitle(),
                $this->mContext->msg( 'protect-edit-reasonlist' )->text(),
                [],
                [ 'action' => 'edit' ]
            );
            $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
        }
 
        $htmlForm = HTMLForm::factory( 'ooui', $fields, $this->mContext );
        $htmlForm
            ->setMethod( 'post' )
            ->setId( 'mw-Protect-Form' )
            ->setTableId( 'mw-protect-table2' )
            ->setAction( $this->mTitle->getLocalURL( 'action=protect' ) )
            ->setSubmitID( 'mw-Protect-submit' )
            ->setSubmitTextMsg( 'confirm' )
            ->setTokenSalt( [ 'protect', $this->mTitle->getPrefixedDBkey() ] )
            ->suppressDefaultSubmit( $this->disabled )
            ->setWrapperLegendMsg( 'protect-legend' )
            ->prepareForm();
 
        return $htmlForm->getHTML( false ) . $out;
    }
 
    private function getOptionLabel( $permission ) {
        if ( $permission == '' ) {
            return $this->mContext->msg( 'protect-default' )->text();
        } else {
            // Messages: protect-level-autoconfirmed, protect-level-sysop
            $msg = $this->mContext->msg( "protect-level-{$permission}" );
            if ( $msg->exists() ) {
                return $msg->text();
            }
            return $this->mContext->msg( 'protect-fallback', $permission )->text();
        }
    }
 
    private function showLogExtract() {
        # Show relevant lines from the protection log:
        $protectLogPage = new LogPage( 'protect' );
        $this->mOut->addHTML( Html::element( 'h2', [], $protectLogPage->getName()->text() ) );
        LogEventsList::showLogExtract( $this->mOut, 'protect', $this->mTitle );
        # Let extensions add other relevant log extracts
        $this->hookRunner->onProtectionForm__showLogExtract( $this->mArticle, $this->mOut );
    }
}