IntroMessageBuilder.php

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<?php
 
namespace MediaWiki\EditPage;
 
use LogicException;
use MediaWiki\Block\DatabaseBlockStore;
use MediaWiki\Config\Config;
use MediaWiki\FileRepo\RepoGroup;
use MediaWiki\Html\Html;
use MediaWiki\Language\MessageLocalizer;
use MediaWiki\Language\RawMessage;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\Logging\LogEventsList;
use MediaWiki\MainConfigNames;
use MediaWiki\Page\PageReference;
use MediaWiki\Page\ProperPageIdentity;
use MediaWiki\Permissions\Authority;
use MediaWiki\Permissions\PermissionManager;
use MediaWiki\Permissions\RestrictionStore;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\ShadowPage\ShadowPageLoader;
use MediaWiki\Skin\Skin;
use MediaWiki\Skin\SkinFactory;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\SpecialPage\SpecialPageFactory;
use MediaWiki\Title\NamespaceInfo;
use MediaWiki\Title\Title;
use MediaWiki\User\TempUser\TempUserCreator;
use MediaWiki\User\UserFactory;
use MediaWiki\User\UserNameUtils;
use MediaWiki\User\UserRigorOptions;
use MediaWiki\Utils\UrlUtils;
use Wikimedia\Rdbms\IConnectionProvider;
use Wikimedia\Rdbms\ReadOnlyMode;
 
class IntroMessageBuilder {
 
    use ParametersHelper;
 
    // Parameters for getIntroMessages()
    public const MORE_FRAMES = 1;
    public const LESS_FRAMES = 2;
 
    public function __construct(
        private readonly Config $config,
        private readonly LinkRenderer $linkRenderer,
        private readonly PermissionManager $permManager,
        private readonly UserNameUtils $userNameUtils,
        private readonly TempUserCreator $tempUserCreator,
        private readonly UserFactory $userFactory,
        private readonly RestrictionStore $restrictionStore,
        private readonly DatabaseBlockStore $blockStore,
        private readonly ReadOnlyMode $readOnlyMode,
        private readonly SpecialPageFactory $specialPageFactory,
        private readonly RepoGroup $repoGroup,
        private readonly NamespaceInfo $namespaceInfo,
        private readonly SkinFactory $skinFactory,
        private readonly IConnectionProvider $dbProvider,
        private readonly UrlUtils $urlUtils,
        private readonly ShadowPageLoader $shadowPageLoader,
    ) {
    }
 
    private function getLogExtract( $types = [], $page = '', $user = '', $param = [] ): string {
        $outString = '';
        LogEventsList::showLogExtract( $outString, $types, $page, $user, $param );
        return $outString;
    }
 
    public function getIntroMessages(
        int $frames,
        array $skip,
        MessageLocalizer $localizer,
        ProperPageIdentity $page,
        ?RevisionRecord $revRecord,
        Authority $performer,
        ?string $editIntro,
        ?string $returnToQuery,
        bool $preview,
        ?string $section = null
    ): array {
        $title = Title::newFromPageIdentity( $page );
        $messages = new IntroMessageList( $frames, $skip );
 
        $this->addOldRevisionWarning( $messages, $localizer, $revRecord );
 
        if ( !$preview ) {
            $this->addCodeEditingIntro( $messages, $localizer, $title, $performer );
            $this->addSharedRepoHint( $messages, $localizer, $page );
            $this->addUserWarnings( $messages, $localizer, $title, $performer );
            $this->addEditIntro( $messages, $localizer, $page, $performer, $editIntro, $section );
            $this->addRecreateWarning( $messages, $page );
        }
 
        $this->addTalkPageText( $messages, $localizer, $title );
        $this->addEditNotices( $messages, $localizer, $title, $revRecord );
 
        $this->addReadOnlyWarning( $messages, $localizer );
        $this->addAnonEditWarning( $messages, $localizer, $title, $performer, $returnToQuery, $preview );
        $this->addUserConfigPageInfo( $messages, $localizer, $title, $performer, $preview );
        $this->addPageProtectionWarningHeaders( $messages, $localizer, $page );
        $this->addHeaderCopyrightWarning( $messages, $localizer );
 
        return $messages->getList();
    }
 
    private function addCodeEditingIntro(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title,
        Authority $performer
    ): void {
        $isUserJsConfig = $title->isUserJsConfigPage();
        $namespace = $title->getNamespace();
        $intro = '';
 
        if (
            $title->isUserConfigPage() &&
            $title->isSubpageOf( Title::makeTitle( NS_USER, $performer->getUser()->getName() ) )
        ) {
            $isUserCssConfig = $title->isUserCssConfigPage();
            $isUserJsonConfig = $title->isUserJsonConfigPage();
            $isUserJsConfig = $title->isUserJsConfigPage();
 
            if ( $isUserCssConfig ) {
                $warning = 'usercssispublic';
            } elseif ( $isUserJsonConfig ) {
                $warning = 'userjsonispublic';
            } else {
                $warning = 'userjsispublic';
            }
 
            $warningText = $localizer->msg( $warning )->parse();
            $intro .= $warningText ? Html::rawElement(
                'div',
                [ 'class' => 'mw-userconfigpublic' ],
                $warningText
            ) : '';
 
        }
        $codeMsg = $localizer->msg( 'editpage-code-message' );
        $codeMessageText = $codeMsg->isDisabled() ? '' : $codeMsg->parseAsBlock();
        $isJavaScript = $title->hasContentModel( CONTENT_MODEL_JAVASCRIPT ) ||
            $title->hasContentModel( CONTENT_MODEL_VUE );
        $isCSS = $title->hasContentModel( CONTENT_MODEL_CSS );
 
        if ( $namespace === NS_MEDIAWIKI ) {
            $interfaceMsg = $localizer->msg( 'editinginterface' );
            if ( $isJavaScript ) {
                $interfaceMsg = $localizer->msg( 'editinginterfacejs' );
            }
            $interfaceMsgText = $interfaceMsg->parse();
            # Show a warning if editing an interface message
            $intro .= $interfaceMsgText ? Html::rawElement(
                'div',
                [ 'class' => 'mw-editinginterface' ],
                $interfaceMsgText
            ) : '';
            # If this is a default message (but not css, json, js or vue),
            # show a hint that it is translatable on translatewiki.net
            if (
                !$isCSS
                && !$title->hasContentModel( CONTENT_MODEL_JSON )
                && !$isJavaScript
                && $this->shadowPageLoader->getMessageProvider()->existsForLink( $title )
            ) {
                $translateInterfaceText = $localizer->msg( 'translateinterface' )->parse();
                $intro .= $translateInterfaceText ? Html::rawElement(
                    'div',
                    [ 'class' => 'mw-translateinterface' ],
                    $translateInterfaceText
                ) : '';
            }
        }
 
        if ( $isUserJsConfig ) {
            $userConfigDangerousMsg = $localizer->msg( 'userjsdangerous' )->parse();
            $intro .= $userConfigDangerousMsg ? Html::rawElement(
                'div',
                [ 'class' => 'mw-userconfigdangerous' ],
                $userConfigDangerousMsg
            ) : '';
        }
 
        // If the wiki page contains JavaScript or CSS link add message specific to code.
        if ( $isJavaScript || $isCSS ) {
            $intro .= $codeMessageText;
        }
 
        $messages->addWithKey(
            'code-editing-intro',
            $intro,
            // While semantically this is a warning, given the impact of editing these pages,
            // it's best to deter users who don't understand what they are doing by
            // acknowledging the danger here. This is a potentially destructive action
            // so requires destructive coloring.
            Html::warningBox( '$1' )
        );
    }
 
    private function addSharedRepoHint(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        ProperPageIdentity $page
    ): void {
        $namespace = $page->getNamespace();
        if ( $namespace === NS_FILE ) {
            # Show a hint to shared repo
            $file = $this->repoGroup->findFile( $page );
            if ( $file && !$file->isLocal() ) {
                $descUrl = $file->getDescriptionUrl();
                # there must be a description url to show a hint to shared repo
                if ( $descUrl ) {
                    if ( !$page->exists() ) {
                        $messages->add(
                            $localizer->msg(
                                'sharedupload-desc-create',
                                $file->getRepo()->getDisplayName(),
                                $descUrl
                            ),
                            "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>"
                        );
                    } else {
                        $messages->add(
                            $localizer->msg(
                                'sharedupload-desc-edit',
                                $file->getRepo()->getDisplayName(),
                                $descUrl
                            ),
                            "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>"
                        );
                    }
                }
            }
        }
    }
 
    private function addUserWarnings(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title,
        Authority $performer
    ): void {
        $namespace = $title->getNamespace();
        # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
        # Show log extract when the user is currently blocked
        if ( $namespace === NS_USER || $namespace === NS_USER_TALK ) {
            $username = explode( '/', $title->getText(), 2 )[0];
            // Allow IP users
            $validation = UserRigorOptions::RIGOR_NONE;
            $user = $this->userFactory->newFromName( $username, $validation );
            $ip = $this->userNameUtils->isIP( $username );
 
            $userExists = ( $user && $user->isRegistered() );
            if ( $userExists && $user->isHidden() && !$performer->isAllowed( 'hideuser' ) ) {
                // If the user exists, but is hidden, and the viewer cannot see hidden
                // users, pretend like they don't exist at all. See T120883
                $userExists = false;
            }
 
            if ( !$userExists && !$ip ) {
                $messages->addWithKey(
                    'userpage-userdoesnotexist',
                    // This wrapper frame, for whatever reason, is not optional
                    Html::warningBox(
                        $localizer->msg( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) )->parse(),
                        'mw-userpage-userdoesnotexist'
                    )
                );
                return;
            }
 
            $blockLogBox = LogEventsList::getBlockLogWarningBox(
                $this->blockStore,
                $this->namespaceInfo,
                $localizer,
                $this->linkRenderer,
                $user,
                $title
            );
            if ( $blockLogBox !== null ) {
                $messages->addWithKey( 'blocked-notice-logextract', $blockLogBox );
            }
        }
    }
 
    private function addEditIntro(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        ProperPageIdentity $page,
        Authority $performer,
        ?string $editIntro,
        ?string $section
    ): void {
        if ( ( $editIntro === null || $editIntro === '' ) && $section === 'new' ) {
            // Custom edit intro for new sections
            $editIntro = 'MediaWiki:addsection-editintro';
        }
        if ( $editIntro !== null && $editIntro !== '' ) {
            $introTitle = Title::newFromText( $editIntro );
 
            // (T334855) Use SpecialMyLanguage redirect so that nonexistent translated pages can
            // fall back to the corresponding page in a suitable language
            $introTitle = $this->getTargetTitleIfSpecialMyLanguage( $introTitle );
 
            if ( $this->isPageExistingAndViewable( $introTitle, $performer ) ) {
                $messages->addWithKey(
                    'editintro',
                    $localizer->msg( new RawMessage(
                        // Added using template syntax, to take <noinclude>'s into account.
                        '<div class="mw-editintro">{{:' . $introTitle->getFullText() . '}}</div>'
                    ) )
                        // Parse as content to enable language conversion (T353870)
                        ->inContentLanguage()
                        ->parse()
                );
                return;
            }
        }
 
        if ( !$page->exists() ) {
            $helpLink = $this->urlUtils->expand(
                Skin::makeInternalOrExternalUrl(
                    $localizer->msg( 'helppage' )->inContentLanguage()->text()
                ),
                PROTO_CURRENT
            );
            if ( $helpLink === null ) {
                throw new LogicException( 'Help link was invalid, this should be impossible' );
            }
            if ( $performer->getUser()->isRegistered() ) {
                $messages->add(
                    $localizer->msg( 'newarticletext', $helpLink ),
                    // Suppress the external link icon, consider the help url an internal one
                    "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>"
                );
            } else {
                $messages->add(
                    $localizer->msg( 'newarticletextanon', $helpLink ),
                    // Suppress the external link icon, consider the help url an internal one
                    "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>"
                );
            }
        }
    }
 
    private function addRecreateWarning(
        IntroMessageList $messages,
        ProperPageIdentity $page
    ): void {
        # Give a notice if the user is editing a deleted/moved page...
        if ( !$page->exists() ) {
            $dbr = $this->dbProvider->getReplicaDatabase();
 
            $messages->addWithKey(
                'recreate-moveddeleted-warn',
                $this->getLogExtract( [ 'delete', 'move', 'merge' ], $page, '', [
                    'lim' => 10,
                    'conds' => [ $dbr->expr( 'log_action', '!=', 'revision' ) ],
                    'showIfEmpty' => false,
                    'msgKey' => [ 'recreate-moveddeleted-warn' ],
                ] )
            );
        }
    }
 
    private function addTalkPageText(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title
    ): void {
        if ( $title->isTalkPage() ) {
            $messages->add( $localizer->msg( 'talkpagetext' ) );
        }
    }
 
    private function addEditNotices(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title,
        ?RevisionRecord $revRecord
    ): void {
        $editNotices = $title->getEditNotices( $revRecord ? $revRecord->getId() : 0 );
        if ( count( $editNotices ) ) {
            foreach ( $editNotices as $key => $html ) {
                $messages->addWithKey( $key, $html );
            }
        } else {
            $msg = $localizer->msg( 'editnotice-notext' );
            if ( !$msg->isDisabled() ) {
                $messages->addWithKey(
                    'editnotice-notext',
                    Html::rawElement(
                        'div',
                        [ 'class' => 'mw-editnotice-notext' ],
                        $msg->parseAsBlock()
                    )
                );
            }
        }
    }
 
    private function addOldRevisionWarning(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        ?RevisionRecord $revRecord
    ): void {
        if ( $revRecord && !$revRecord->isCurrent() ) {
            // This wrapper frame is not optional (T337071)
            $messages->addWithKey( 'editingold', Html::warningBox( $localizer->msg( 'editingold' )->parse() ) );
        }
    }
 
    private function addReadOnlyWarning(
        IntroMessageList $messages,
        MessageLocalizer $localizer
    ): void {
        if ( $this->readOnlyMode->isReadOnly() ) {
            $messages->add(
                $localizer->msg( 'readonlywarning', $this->readOnlyMode->getReason() ),
                "<div id=\"mw-read-only-warning\">\n$1\n</div>"
            );
        }
    }
 
    private function addAnonEditWarning(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title,
        Authority $performer,
        ?string $returnToQuery,
        bool $preview
    ): void {
        if ( !$performer->getUser()->isRegistered() ) {
            $tempUserCreateActive = $this->tempUserCreator->shouldAutoCreate( $performer, 'edit' );
            if ( !$preview ) {
                $messages->addWithKey(
                    'anoneditwarning',
                    $localizer->msg(
                        $tempUserCreateActive ? 'autocreate-edit-warning' : 'anoneditwarning',
                        // Log-in link
                        SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
                            'returnto' => $title->getPrefixedDBkey(),
                            'returntoquery' => $returnToQuery,
                        ] ),
                        // Sign-up link
                        SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
                            'returnto' => $title->getPrefixedDBkey(),
                            'returntoquery' => $returnToQuery,
                        ] )
                    )->parse(),
                    Html::warningBox( '$1', 'mw-anon-edit-warning' )
                );
            } else {
                $messages->addWithKey(
                    'anoneditwarning',
                    $localizer->msg( $tempUserCreateActive ? 'autocreate-preview-warning' : 'anonpreviewwarning' )
                        ->parse(),
                    Html::warningBox( '$1', 'mw-anon-preview-warning' ) );
            }
        }
    }
 
    private function isWrongCaseUserConfigPage( Title $title ): bool {
        if ( $title->isUserCssConfigPage() || $title->isUserJsConfigPage() ) {
            $name = $title->getSkinFromConfigSubpage();
            $skins = array_merge(
                array_keys( $this->skinFactory->getInstalledSkins() ),
                [ 'common' ]
            );
            return !in_array( $name, $skins, true )
                && in_array( strtolower( $name ), $skins, true );
        } else {
            return false;
        }
    }
 
    private function addUserConfigPageInfo(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        Title $title,
        Authority $performer,
        bool $preview
    ): void {
        if ( $title->isUserConfigPage() ) {
            # Check the skin exists
            if ( $this->isWrongCaseUserConfigPage( $title ) ) {
                $messages->add(
                    $localizer->msg( 'userinvalidconfigtitle', $title->getSkinFromConfigSubpage() ),
                    Html::errorBox( '$1', '', 'mw-userinvalidconfigtitle' )
                );
            }
            if ( $title->isSubpageOf( Title::makeTitle( NS_USER, $performer->getUser()->getName() ) ) ) {
                $isUserCssConfig = $title->isUserCssConfigPage();
                $isUserJsonConfig = $title->isUserJsonConfigPage();
                $isUserJsConfig = $title->isUserJsConfigPage();
 
                if ( !$preview ) {
                    if ( $isUserCssConfig && $this->config->get( MainConfigNames::AllowUserCss ) ) {
                        $messages->add(
                            $localizer->msg( 'usercssyoucanpreview' ),
                            "<div id='mw-usercssyoucanpreview'>\n$1\n</div>"
                        );
                    } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
                        $messages->add(
                            $localizer->msg( 'userjsonyoucanpreview' ),
                            "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>"
                        );
                    } elseif ( $isUserJsConfig && $this->config->get( MainConfigNames::AllowUserJs ) ) {
                        $messages->add(
                            $localizer->msg( 'userjsyoucanpreview' ),
                            "<div id='mw-userjsyoucanpreview'>\n$1\n</div>"
                        );
                    }
                }
            }
        }
    }
 
    private function addPageProtectionWarningHeaders(
        IntroMessageList $messages,
        MessageLocalizer $localizer,
        ProperPageIdentity $page
    ): void {
        if ( $this->restrictionStore->isProtected( $page, 'edit' ) &&
            $this->permManager->getNamespaceRestrictionLevels(
                $page->getNamespace()
            ) !== [ '' ]
        ) {
            # Is the title semi-protected?
            if ( $this->restrictionStore->isSemiProtected( $page ) ) {
                $noticeMsg = 'semiprotectedpagewarning';
            } else {
                # Then it must be protected based on static groups (regular)
                $noticeMsg = 'protectedpagewarning';
            }
            $messages->addWithKey(
                $noticeMsg,
                $this->getLogExtract( 'protect', $page, '', [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] )
            );
        }
        if ( $this->restrictionStore->isCascadeProtected( $page ) ) {
            # Is this page under cascading protection from some source pages?
            $tlCascadeSources = $this->restrictionStore->getCascadeProtectionSources( $page )[2];
            if ( $tlCascadeSources ) {
                $htmlList = '';
                # Explain, and list the titles responsible
                foreach ( $tlCascadeSources as $source ) {
                    $htmlList .= Html::rawElement( 'li', [], $this->linkRenderer->makeLink( $source ) );
                }
                $messages->addWithKey(
                    'cascadeprotectedwarning',
                    $localizer->msg( 'cascadeprotectedwarning', count( $tlCascadeSources ) )->parse() .
                        ( $htmlList ? Html::rawElement( 'ul', [], $htmlList ) : '' ),
                    Html::warningBox( '$1', 'mw-cascadeprotectedwarning' )
                );
            }
        }
        if ( !$page->exists() && $this->restrictionStore->getRestrictions( $page, 'create' ) ) {
            $messages->addWithKey(
                'titleprotectedwarning',
                $this->getLogExtract(
                    'protect', $page,
                    '',
                    [
                        'lim' => 1,
                        'showIfEmpty' => false,
                        'msgKey' => [ 'titleprotectedwarning' ],
                        'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>"
                    ]
                )
            );
        }
    }
 
    private function addHeaderCopyrightWarning(
        IntroMessageList $messages,
        MessageLocalizer $localizer
    ): void {
        $messages->add(
            $localizer->msg( 'editpage-head-copy-warn' ),
            "<div class='editpage-head-copywarn'>\n$1\n</div>"
        );
    }
}