Kitodo\Dlf\Common\MetsDocument::_getThumbnail()

Complexity

Conditions	14
Paths	29

Size

Total Lines	74
Code Lines	50

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
    protected function _getThumbnail($forceReload = false)
    {
        if (
            !$this->thumbnailLoaded
            || $forceReload
        ) {
            // Retain current PID.
            $cPid = ($this->cPid ? $this->cPid : $this->pid);
            if (!$cPid) {
                $this->logger->error('Invalid PID ' . $cPid . ' for structure definitions');
                $this->thumbnailLoaded = true;
                return $this->thumbnail;
            }
            // Load extension configuration.
            $extConf = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get(self::$extKey);
            if (empty($extConf['fileGrpThumbs'])) {
                $this->logger->warning('No fileGrp for thumbnails specified');
                $this->thumbnailLoaded = true;
                return $this->thumbnail;
            }
            $strctId = $this->_getToplevelId();
            $metadata = $this->getTitledata($cPid);

            $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
                ->getQueryBuilderForTable('tx_dlf_structures');

            // Get structure element to get thumbnail from.
            $result = $queryBuilder
                ->select('tx_dlf_structures.thumbnail AS thumbnail')
                ->from('tx_dlf_structures')
                ->where(
                    $queryBuilder->expr()->eq('tx_dlf_structures.pid', intval($cPid)),
                    $queryBuilder->expr()->eq('tx_dlf_structures.index_name', $queryBuilder->expr()->literal($metadata['type'][0])),
                    Helper::whereExpression('tx_dlf_structures')
                )
                ->setMaxResults(1)
                ->execute();

            $allResults = $result->fetchAll();

            if (count($allResults) == 1) {
                $resArray = $allResults[0];
                // Get desired thumbnail structure if not the toplevel structure itself.
                if (!empty($resArray['thumbnail'])) {
                    $strctType = Helper::getIndexNameFromUid($resArray['thumbnail'], 'tx_dlf_structures', $cPid);
                    // Check if this document has a structure element of the desired type.
                    $strctIds = $this->mets->xpath('./mets:structMap[@TYPE="LOGICAL"]//mets:div[@TYPE="' . $strctType . '"]/@ID');
                    if (!empty($strctIds)) {
                        $strctId = (string) $strctIds[0];
                    }
                }
                // Load smLinks.
                $this->_getSmLinks();
                // Get thumbnail location.
                $fileGrpsThumb = GeneralUtility::trimExplode(',', $extConf['fileGrpThumbs']);
                while ($fileGrpThumb = array_shift($fileGrpsThumb)) {
                    if (
                        $this->_getPhysicalStructure()
                        && !empty($this->smLinks['l2p'][$strctId])
                        && !empty($this->physicalStructureInfo[$this->smLinks['l2p'][$strctId][0]]['files'][$fileGrpThumb])
                    ) {
                        $this->thumbnail = $this->getFileLocation($this->physicalStructureInfo[$this->smLinks['l2p'][$strctId][0]]['files'][$fileGrpThumb]);
                        break;
                    } elseif (!empty($this->physicalStructureInfo[$this->physicalStructure[1]]['files'][$fileGrpThumb])) {
                        $this->thumbnail = $this->getFileLocation($this->physicalStructureInfo[$this->physicalStructure[1]]['files'][$fileGrpThumb]);
                        break;
                    }
                }
            } else {
                $this->logger->error('No structure of type "' . $metadata['type'][0] . '" found in database');
            }
            $this->thumbnailLoaded = true;
        }
        return $this->thumbnail;
    }