SpecialImport.php

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<?php
namespace MediaWiki\Specials;
 
use Exception;
use ImportReporter;
use MediaWiki\Exception\PermissionsError;
use MediaWiki\Html\Html;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Import\ImportStreamSource;
use MediaWiki\Import\WikiImporterFactory;
use MediaWiki\MainConfigNames;
use MediaWiki\Permissions\PermissionStatus;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use UnexpectedValueException;
use Wikimedia\Rdbms\DBError;
use Wikimedia\RequestTimeout\TimeoutException;
 
class SpecialImport extends SpecialPage {
    private $importSources;
 
    private WikiImporterFactory $wikiImporterFactory;
 
    public function __construct(
        WikiImporterFactory $wikiImporterFactory
    ) {
        parent::__construct( 'Import', 'import' );
 
        $this->wikiImporterFactory = $wikiImporterFactory;
    }
 
    public function doesWrites() {
        return true;
    }
 
    public function execute( $par ) {
        $this->useTransactionalTimeLimit();
 
        $this->setHeaders();
        $this->outputHeader();
 
        $this->importSources = $this->getConfig()->get( MainConfigNames::ImportSources );
        // Avoid phan error by checking the type
        if ( !is_array( $this->importSources ) ) {
            throw new UnexpectedValueException( '$wgImportSources must be an array' );
        }
        $this->getHookRunner()->onImportSources( $this->importSources );
 
        $authority = $this->getAuthority();
        $statusImport = PermissionStatus::newEmpty();
        $authority->isDefinitelyAllowed( 'import', $statusImport );
        $statusImportUpload = PermissionStatus::newEmpty();
        $authority->isDefinitelyAllowed( 'importupload', $statusImportUpload );
        // Only show an error here if the user can't import using either method.
        // If they can use at least one of the methods, allow access, and checks elsewhere
        // will ensure that we only show the form(s) they can use.
        $out = $this->getOutput();
        if ( !$statusImport->isGood() && !$statusImportUpload->isGood() ) {
            // Show separate messages for each check. There isn't a good way to merge them into a single
            // message if the checks failed for different reasons.
            $out->prepareErrorPage();
            $out->setPageTitleMsg( $this->msg( 'permissionserrors' ) );
            $out->addModuleStyles( 'mediawiki.codex.messagebox.styles' );
            $out->addWikiTextAsInterface( Html::errorBox(
                $out->formatPermissionStatus( $statusImport, 'import' )
            ) );
            $out->addWikiTextAsInterface( Html::errorBox(
                $out->formatPermissionStatus( $statusImportUpload, 'importupload' )
            ) );
            return;
        }
 
        $out->addModules( 'mediawiki.misc-authed-ooui' );
        $out->addModuleStyles( 'mediawiki.special.import.styles.ooui' );
 
        $this->checkReadOnly();
 
        $request = $this->getRequest();
        if ( $request->wasPosted() && $request->getRawVal( 'action' ) == 'submit' ) {
            $this->doImport();
        }
        $this->showForm();
    }
 
    private function doImport() {
        $isUpload = false;
        $request = $this->getRequest();
        $sourceName = $request->getVal( 'source' );
        $assignKnownUsers = $request->getCheck( 'assignKnownUsers' );
 
        $logcomment = $request->getText( 'log-comment' );
        $pageLinkDepth = $this->getConfig()->get( MainConfigNames::ExportMaxLinkDepth ) == 0
            ? 0
            : $request->getIntOrNull( 'pagelink-depth' );
 
        $rootpage = '';
        $mapping = $request->getVal( 'mapping' );
        $namespace = $this->getConfig()->get( MainConfigNames::ImportTargetNamespace );
        if ( $mapping === 'namespace' ) {
            $namespace = $request->getIntOrNull( 'namespace' );
        } elseif ( $mapping === 'subpage' ) {
            $rootpage = $request->getText( 'rootpage' );
        }
 
        $user = $this->getUser();
        $authority = $this->getAuthority();
        $status = PermissionStatus::newEmpty();
 
        $fullInterwikiPrefix = null;
        if ( !$user->matchEditToken( $request->getVal( 'wpEditToken' ) ) ) {
            $source = Status::newFatal( 'import-token-mismatch' );
        } elseif ( $sourceName === 'upload' ) {
            $isUpload = true;
            $fullInterwikiPrefix = $request->getVal( 'usernamePrefix' );
            if ( $authority->authorizeAction( 'importupload', $status ) ) {
                $source = ImportStreamSource::newFromUpload( "xmlimport" );
            } else {
                throw new PermissionsError( 'importupload', $status );
            }
        } elseif ( $sourceName === 'interwiki' ) {
            if ( !$authority->authorizeAction( 'import', $status ) ) {
                throw new PermissionsError( 'import', $status );
            }
            $interwiki = $fullInterwikiPrefix = $request->getVal( 'interwiki' );
            // does this interwiki have subprojects?
            $hasSubprojects = array_key_exists( $interwiki, $this->importSources );
            if ( !$hasSubprojects && !in_array( $interwiki, $this->importSources ) ) {
                $source = Status::newFatal( "import-invalid-interwiki" );
            } else {
                $subproject = null;
                if ( $hasSubprojects ) {
                    $subproject = $request->getVal( 'subproject' );
                    // Trim "project::" prefix added for JS
                    if ( str_starts_with( $subproject, $interwiki . '::' ) ) {
                        $subproject = substr( $subproject, strlen( $interwiki . '::' ) );
                    }
                    $fullInterwikiPrefix .= ':' . $subproject;
                }
                if ( $hasSubprojects &&
                    !in_array( $subproject, $this->importSources[$interwiki] )
                ) {
                    $source = Status::newFatal( 'import-invalid-interwiki' );
                } else {
                    $history = $request->getCheck( 'interwikiHistory' );
                    $frompage = $request->getText( 'frompage' );
                    $includeTemplates = $request->getCheck( 'interwikiTemplates' );
                    $source = ImportStreamSource::newFromInterwiki(
                        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable False positive
                        $fullInterwikiPrefix,
                        $frompage,
                        $history,
                        $includeTemplates,
                        $pageLinkDepth );
                }
            }
        } else {
            $source = Status::newFatal( "importunknownsource" );
        }
 
        if ( (string)$fullInterwikiPrefix === '' ) {
            $source->fatal( 'importnoprefix' );
        }
 
        $out = $this->getOutput();
        if ( !$source->isGood() ) {
            $out->wrapWikiMsg(
                Html::errorBox( '$1' ),
                [
                    'importfailed',
                    $source->getWikiText( false, false, $this->getLanguage() ),
                    count( $source->getMessages() )
                ]
            );
        } else {
            $importer = $this->wikiImporterFactory->getWikiImporter( $source->value, $this->getAuthority() );
            if ( $namespace !== null ) {
                $importer->setTargetNamespace( $namespace );
            } elseif ( $rootpage !== null ) {
                $statusRootPage = $importer->setTargetRootPage( $rootpage );
                if ( !$statusRootPage->isGood() ) {
                    $out->wrapWikiMsg(
                        Html::errorBox( '$1' ),
                        [
                            'import-options-wrong',
                            $statusRootPage->getWikiText( false, false, $this->getLanguage() ),
                            count( $statusRootPage->getMessages() )
                        ]
                    );
 
                    return;
                }
            }
            // @phan-suppress-next-line PhanTypeMismatchArgumentNullable False positive
            $importer->setUsernamePrefix( $fullInterwikiPrefix, $assignKnownUsers );
 
            $out->addWikiMsg( "importstart" );
 
            $reporter = new ImportReporter(
                $importer,
                $isUpload,
                // @phan-suppress-next-line PhanTypeMismatchArgumentNullable False positive
                $fullInterwikiPrefix,
                $logcomment,
                $this->getContext()
            );
            $exception = false;
 
            $reporter->open();
            try {
                $importer->doImport();
            } catch ( DBError | TimeoutException $e ) {
                // Re-throw exceptions which are not safe to catch (T383933).
                throw $e;
            } catch ( Exception $e ) {
                $exception = $e;
            } finally {
                $result = $reporter->close();
            }
 
            if ( $exception ) {
                # No source or XML parse error
                $out->wrapWikiMsg(
                    Html::errorBox( '$1' ),
                    [ 'importfailed', wfEscapeWikiText( $exception->getMessage() ), 1 ]
                );
            } elseif ( !$result->isGood() ) {
                # Zero revisions
                $out->wrapWikiMsg(
                    Html::errorBox( '$1' ),
                    [
                        'importfailed',
                        $result->getWikiText( false, false, $this->getLanguage() ),
                        count( $result->getMessages() )
                    ]
                );
            } else {
                # Success!
                $out->addWikiMsg( 'importsuccess' );
            }
        }
    }
 
    private function getMappingFormPart( string $sourceName ): array {
        $defaultNamespace = $this->getConfig()->get( MainConfigNames::ImportTargetNamespace );
        return [
            'mapping' => [
                'type' => 'radio',
                'name' => 'mapping',
                // IDs: mw-import-mapping-interwiki, mw-import-mapping-upload
                'id' => "mw-import-mapping-$sourceName",
                'options-messages' => [
                    'import-mapping-default' => 'default',
                    'import-mapping-namespace' => 'namespace',
                    'import-mapping-subpage' => 'subpage'
                ],
                'default' => $defaultNamespace !== null ? 'namespace' : 'default'
            ],
            'namespace' => [
                'type' => 'namespaceselect',
                'name' => 'namespace',
                // IDs: mw-import-namespace-interwiki, mw-import-namespace-upload
                'id' => "mw-import-namespace-$sourceName",
                'default' => $defaultNamespace ?: '',
                'all' => null,
                'disable-if' => [ '!==', 'mapping', 'namespace' ],
            ],
            'rootpage' => [
                'type' => 'text',
                'name' => 'rootpage',
                // Should be "mw-import-...", but we keep the inaccurate ID for compat
                // IDs: mw-interwiki-rootpage-interwiki, mw-interwiki-rootpage-upload
                'id' => "mw-interwiki-rootpage-$sourceName",
                'disable-if' => [ '!==', 'mapping', 'subpage' ],
            ],
        ];
    }
 
    private function showForm() {
        $action = $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] );
        $authority = $this->getAuthority();
        $out = $this->getOutput();
        $this->addHelpLink( 'https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Import', true );
 
        $interwikiFormDescriptor = [];
        $uploadFormDescriptor = [];
 
        if ( $authority->isDefinitelyAllowed( 'importupload' ) ) {
            $mappingSelection = $this->getMappingFormPart( 'upload' );
            $uploadFormDescriptor += [
                'intro' => [
                    'type' => 'info',
                    'raw' => true,
                    'default' => $this->msg( 'importtext' )->parseAsBlock()
                ],
                'xmlimport' => [
                    'type' => 'file',
                    'name' => 'xmlimport',
                    'accept' => [ 'application/xml', 'text/xml' ],
                    'label-message' => 'import-upload-filename',
                    'required' => true,
                ],
                'usernamePrefix' => [
                    'type' => 'text',
                    'name' => 'usernamePrefix',
                    'label-message' => 'import-upload-username-prefix',
                    'required' => true,
                ],
                'assignKnownUsers' => [
                    'type' => 'check',
                    'name' => 'assignKnownUsers',
                    'label-message' => 'import-assign-known-users'
                ],
                'log-comment' => [
                    'type' => 'text',
                    'name' => 'log-comment',
                    'label-message' => 'import-comment'
                ],
                'source' => [
                    'type' => 'hidden',
                    'name' => 'source',
                    'default' => 'upload',
                    'id' => '',
                ],
            ];
 
            $uploadFormDescriptor += $mappingSelection;
 
            $htmlForm = HTMLForm::factory( 'ooui', $uploadFormDescriptor, $this->getContext() );
            $htmlForm->setAction( $action );
            $htmlForm->setId( 'mw-import-upload-form' );
            $htmlForm->setWrapperLegendMsg( 'import-upload' );
            $htmlForm->setSubmitTextMsg( 'uploadbtn' );
            $htmlForm->prepareForm()->displayForm( false );
 
        } elseif ( !$this->importSources ) {
            $out->addWikiMsg( 'importnosources' );
        }
 
        if ( $authority->isDefinitelyAllowed( 'import' ) && $this->importSources ) {
 
            $projects = [];
            $needSubprojectField = false;
            foreach ( $this->importSources as $key => $value ) {
                if ( is_int( $key ) ) {
                    $key = $value;
                } elseif ( $value !== $key ) {
                    $needSubprojectField = true;
                }
 
                $projects[ $key ] = $key;
            }
 
            $interwikiFormDescriptor += [
                'intro' => [
                    'type' => 'info',
                    'raw' => true,
                    'default' => $this->msg( 'import-interwiki-text' )->parseAsBlock()
                ],
                'interwiki' => [
                    'type' => 'select',
                    'name' => 'interwiki',
                    'label-message' => 'import-interwiki-sourcewiki',
                    'options' => $projects
                ],
            ];
 
            if ( $needSubprojectField ) {
                $subprojects = [];
                foreach ( $this->importSources as $key => $value ) {
                    if ( is_array( $value ) ) {
                        foreach ( $value as $subproject ) {
                            $subprojects[ $subproject ] = $key . '::' . $subproject;
                        }
                    }
                }
 
                $interwikiFormDescriptor += [
                    'subproject' => [
                        'type' => 'select',
                        'name' => 'subproject',
                        'options' => $subprojects
                    ]
                ];
            }
 
            $interwikiFormDescriptor += [
                'frompage' => [
                    'type' => 'text',
                    'name' => 'frompage',
                    'label-message' => 'import-interwiki-sourcepage'
                ],
                'interwikiHistory' => [
                    'type' => 'check',
                    'name' => 'interwikiHistory',
                    'label-message' => 'import-interwiki-history'
                ],
                'interwikiTemplates' => [
                    'type' => 'check',
                    'name' => 'interwikiTemplates',
                    'label-message' => 'import-interwiki-templates'
                ],
                'assignKnownUsers' => [
                    'type' => 'check',
                    'name' => 'assignKnownUsers',
                    'label-message' => 'import-assign-known-users'
                ],
            ];
 
            if ( $this->getConfig()->get( MainConfigNames::ExportMaxLinkDepth ) > 0 ) {
                $interwikiFormDescriptor += [
                    'pagelink-depth' => [
                        'type' => 'int',
                        'name' => 'pagelink-depth',
                        'label-message' => 'export-pagelinks',
                        'default' => 0
                    ]
                ];
            }
 
            $interwikiFormDescriptor += [
                'log-comment' => [
                    'type' => 'text',
                    'name' => 'log-comment',
                    'label-message' => 'import-comment'
                ],
                'source' => [
                    'type' => 'hidden',
                    'name' => 'source',
                    'default' => 'interwiki',
                    'id' => '',
                ],
            ];
            $mappingSelection = $this->getMappingFormPart( 'interwiki' );
 
            $interwikiFormDescriptor += $mappingSelection;
 
            $htmlForm = HTMLForm::factory( 'ooui', $interwikiFormDescriptor, $this->getContext() );
            $htmlForm->setAction( $action );
            $htmlForm->setId( 'mw-import-interwiki-form' );
            $htmlForm->setWrapperLegendMsg( 'importinterwiki' );
            $htmlForm->setSubmitTextMsg( 'import-interwiki-submit' );
            $htmlForm->prepareForm()->displayForm( false );
        }
    }
 
    protected function getGroupName() {
        return 'pagetools';
    }
}
 
class_alias( SpecialImport::class, 'SpecialImport' );