Kitodo\Dlf\Common\Document\Document::getInstance()

Complexity

Conditions	28
Paths	1022

Size

Total Lines	152
Code Lines	94

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public static function &getInstance($uid, $pid = 0, $forceReload = false)
    {
        // Sanitize input.
        $pid = max(intval($pid), 0);
        if (!$forceReload) {
            $regObj = Helper::digest($uid);
            if (
                is_object(self::$registry[$regObj])
                && self::$registry[$regObj] instanceof self
            ) {
                // Check if instance has given PID.
                if (
                    !$pid
                    || !self::$registry[$regObj]->pid
                    || $pid == self::$registry[$regObj]->pid
                ) {
                    // Return singleton instance if available.
                    return self::$registry[$regObj];
                }
            } else {
                // Check the user's session...
                $sessionData = Helper::loadFromSession(get_called_class());
                if (
                    is_object($sessionData[$regObj])
                    && $sessionData[$regObj] instanceof self
                ) {
                    // Check if instance has given PID.
                    if (
                        !$pid
                        || !$sessionData[$regObj]->pid
                        || $pid == $sessionData[$regObj]->pid
                    ) {
                        // ...and restore registry.
                        self::$registry[$regObj] = $sessionData[$regObj];
                        return self::$registry[$regObj];
                    }
                }
            }
        }
        // Create new instance depending on format (METS or IIIF) ...
        $instance = null;
        $documentFormat = null;
        $xml = null;
        $iiif = null;
        // Try to get document format from database
        if (MathUtility::canBeInterpretedAsInteger($uid)) {
            $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
                ->getQueryBuilderForTable('tx_dlf_documents');

            $queryBuilder
                ->select(
                    'tx_dlf_documents.location AS location',
                    'tx_dlf_documents.document_format AS document_format'
                )
                ->from('tx_dlf_documents');

            // Get UID of document with given record identifier.
            if ($pid) {
                $queryBuilder
                    ->where(
                        $queryBuilder->expr()->eq('tx_dlf_documents.uid', intval($uid)),
                        $queryBuilder->expr()->eq('tx_dlf_documents.pid', intval($pid)),
                        Helper::whereExpression('tx_dlf_documents')
                    );
            } else {
                $queryBuilder
                    ->where(
                        $queryBuilder->expr()->eq('tx_dlf_documents.uid', intval($uid)),
                        Helper::whereExpression('tx_dlf_documents')
                    );
            }

            $result = $queryBuilder
                ->setMaxResults(1)
                ->execute();

            if ($resArray = $result->fetch()) {
                $documentFormat = $resArray['document_format'];
            }
        } else {
            // Get document format from content of remote document
            // Cast to string for safety reasons.
            $location = (string) $uid;
            // Try to load a file from the url
            if (GeneralUtility::isValidUrl($location)) {
                // Load extension configuration
                $extConf = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get(self::$extKey);
                // Set user-agent to identify self when fetching XML data.
                if (!empty($extConf['useragent'])) {
                    @ini_set('user_agent', $extConf['useragent']);
                }
                $content = GeneralUtility::getUrl($location);
                if ($content !== false) {
                    // TODO use single place to load xml
                    // Turn off libxml's error logging.
                    $libxmlErrors = libxml_use_internal_errors(true);
                    // Disables the functionality to allow external entities to be loaded when parsing the XML, must be kept
                    $previousValueOfEntityLoader = libxml_disable_entity_loader(true);
                    // Try to load XML from file.
                    $xml = simplexml_load_string($content);
                    // reset entity loader setting
                    libxml_disable_entity_loader($previousValueOfEntityLoader);
                    // Reset libxml's error logging.
                    libxml_use_internal_errors($libxmlErrors);
                    if ($xml !== false) {
                        /* @var $xml \SimpleXMLElement */
                        $xml->registerXPathNamespace('mets', 'http://www.loc.gov/METS/');
                        $xpathResult = $xml->xpath('//mets:mets');
                        $documentFormat = !empty($xpathResult) ? 'METS' : null;
                    } else {
                        // Try to load file as IIIF resource instead.
                        $contentAsJsonArray = json_decode($content, true);
                        if ($contentAsJsonArray !== null) {
                            // Load plugin configuration.
                            $conf = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get(self::$extKey);
                            IiifHelper::setUrlReader(IiifUrlReader::getInstance());

The type Kitodo\Dlf\Common\Document\IiifUrlReader was not found. Maybe you did not declare it correctly or list all dependencies?

                            IiifHelper::setMaxThumbnailHeight($conf['iiifThumbnailHeight']);
                            IiifHelper::setMaxThumbnailWidth($conf['iiifThumbnailWidth']);
                            $iiif = IiifHelper::loadIiifResource($contentAsJsonArray);
                            if ($iiif instanceof IiifResourceInterface) {
                                $documentFormat = 'IIIF';
                            }
                        }
                    }
                }
            }
        }
        // Sanitize input.
        $pid = max(intval($pid), 0);
        if ($documentFormat == 'METS') {
            $instance = new MetsDocument($uid, $pid, $xml);
        } elseif ($documentFormat == 'IIIF') {
            $instance = new IiifManifest($uid, $pid, $iiif);
        }
        // Save instance to registry.
        if (
            $instance instanceof self
            && $instance->ready) {
            self::$registry[Helper::digest($instance->uid)] = $instance;
            if ($instance->uid != $instance->location) {
                self::$registry[Helper::digest($instance->location)] = $instance;
            }
            // Load extension configuration
            $extConf = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get(self::$extKey);
            // Save registry to session if caching is enabled.
            if (!empty($extConf['caching'])) {
                Helper::saveToSession(self::$registry, get_class($instance));
            }
        }
        $instance->logger = GeneralUtility::makeInstance(LogManager::class)->getLogger(get_class($instance));

It seems like $instance can also be of type null; however, parameter $object of get_class() does only seem to accept object, maybe add an additional type check?

        // Return new instance.
        return $instance;
    }