TreeDataProviderFactory.php

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<?php
namespace TYPO3\CMS\Core\Tree\TableConfiguration;

class TreeDataProviderFactory {

    static public function getDataProvider(array $tcaConfiguration, $table, $field, $currentValue) {
        $dataProvider = NULL;
        if (!isset($tcaConfiguration['treeConfig']) | !is_array($tcaConfiguration['treeConfig'])) {
            throw new \InvalidArgumentException('TCA Tree configuration is invalid: "treeConfig" array is missing', 1288215890);
        }

        if (!empty($tcaConfiguration['treeConfig']['dataProvider'])) {
            $dataProvider = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance($tcaConfiguration['treeConfig']['dataProvider'], $tcaConfiguration, $table, $field, $currentValue);
        }
        if (!isset($tcaConfiguration['internal_type'])) {
            $tcaConfiguration['internal_type'] = 'db';
        }
        if ($tcaConfiguration['internal_type'] === 'db') {
            $unselectableUids = array();
            if ($dataProvider === NULL) {
                $dataProvider = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Core\\Tree\\TableConfiguration\\DatabaseTreeDataProvider');
            }
            if (isset($tcaConfiguration['foreign_table'])) {
                $tableName = $tcaConfiguration['foreign_table'];
                $dataProvider->setTableName($tableName);
                if ($tableName == $table) {
                    $unselectableUids[] = $currentValue['uid'];
                }
            } else {
                throw new \InvalidArgumentException('TCA Tree configuration is invalid: "foreign_table" not set', 1288215888);
            }
            if (isset($tcaConfiguration['foreign_label'])) {
                $dataProvider->setLabelField($tcaConfiguration['foreign_label']);
            } else {
                $dataProvider->setLabelField($GLOBALS['TCA'][$tableName]['ctrl']['label']);
            }
            $dataProvider->setTreeId(md5($table . '|' . $field));
            $dataProvider->setSelectedList($currentValue);

            $treeConfiguration = $tcaConfiguration['treeConfig'];
            if (isset($treeConfiguration['rootUid'])) {
                $dataProvider->setRootUid((int)$treeConfiguration['rootUid']);
            }
            if (isset($treeConfiguration['appearance']['expandAll'])) {
                $dataProvider->setExpandAll((bool) $treeConfiguration['appearance']['expandAll']);
            }
            if (isset($treeConfiguration['appearance']['maxLevels'])) {
                $dataProvider->setLevelMaximum((int)$treeConfiguration['appearance']['maxLevels']);
            }
            if (isset($treeConfiguration['appearance']['nonSelectableLevels'])) {
                $dataProvider->setNonSelectableLevelList($treeConfiguration['appearance']['nonSelectableLevels']);
            } elseif (isset($treeConfiguration['rootUid'])) {
                $dataProvider->setNonSelectableLevelList('');
            }
            if (isset($treeConfiguration['childrenField'])) {
                $dataProvider->setLookupMode(\TYPO3\CMS\Core\Tree\TableConfiguration\DatabaseTreeDataProvider::MODE_CHILDREN);
                $dataProvider->setLookupField($treeConfiguration['childrenField']);
            } elseif (isset($treeConfiguration['parentField'])) {
                $dataProvider->setLookupMode(\TYPO3\CMS\Core\Tree\TableConfiguration\DatabaseTreeDataProvider::MODE_PARENT);
                $dataProvider->setLookupField($treeConfiguration['parentField']);
            } else {
                throw new \InvalidArgumentException('TCA Tree configuration is invalid: neither "childrenField" nor "parentField" is set', 1288215889);
            }
            $dataProvider->setItemUnselectableList($unselectableUids);

        } elseif ($tcaConfiguration['internal_type'] === 'file' && $dataProvider === NULL) {
            // TODO Not implemented yet
            throw new \InvalidArgumentException('TCA Tree configuration is invalid: tree for "internal_type=file" not implemented yet', 1288215891);
        } elseif ($dataProvider === NULL) {
            throw new \InvalidArgumentException('TCA Tree configuration is invalid: tree for "internal_type=' . $tcaConfiguration['internal_type'] . '" not implemented yet', 1288215892);
        }
        return $dataProvider;
    }

}