class.ilDataCollectionExporter.php

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<?php
require_once("./Services/Export/classes/class.ilExport.php");
require_once('./Services/Export/classes/class.ilXmlExporter.php');
require_once('class.ilDataCollectionDataSet.php');
require_once('./Modules/DataCollection/classes/Helpers/class.ilDclCache.php');
require_once('./Modules/MediaPool/classes/class.ilObjMediaPool.php');

class ilDataCollectionExporter extends ilXmlExporter {

        protected $ds;
        protected $db;


        public function init() {
                global $DIC;
                $ilDB = $DIC['ilDB'];
                $this->ds = new ilDataCollectionDataSet();
                $this->ds->setDSPrefix('ds');
                $this->db = $ilDB;
        }


        public function getValidSchemaVersions($a_entity) {
                return array(
                        '4.5.0' => array(
                                'namespace' => 'http://www.ilias.de/Modules/DataCollection/dcl/4_5',
                                'xsd_file" => "ilias_dcl_4_5.xsd',
                                'uses_dataset' => true,
                                'min' => '4.5.0',
                                'max' => ''
                        )
                );
        }


        public function getXmlRepresentation($a_entity, $a_schema_version, $a_id) {
                ilUtil::makeDirParents($this->getAbsoluteExportDirectory());
                $this->ds->setExportDirectories($this->dir_relative, $this->dir_absolute);

                return $this->ds->getXmlRepresentation($a_entity, $a_schema_version, $a_id, '', true, true);
        }


        public function getXmlExportHeadDependencies($a_entity, $a_target_release, $a_ids) {
                $dependencies = array(
                        ilDclDatatype::INPUTFORMAT_FILE => array(
                                'component' => 'Modules/File',
                                'entity' => 'file',
                                'ids' => array(),
                        ),
                        ilDclDatatype::INPUTFORMAT_MOB => array(
                                'component' => 'Services/MediaObjects',
                                'entity' => 'mob',
                                'ids' => array(),
                        ),
                );

                // Direct SQL query is faster than looping over objects
                foreach ($a_ids as $dcl_obj_id) {
                        $sql = "SELECT stloc2.value AS ext_id, f." . $this->db->quoteIdentifier('datatype_id') . " FROM il_dcl_stloc2_value AS stloc2 "
                                . "INNER JOIN il_dcl_record_field AS rf ON (rf." . $this->db->quoteIdentifier('id') . " = stloc2." . $this->db->quoteIdentifier('record_field_id') . ") "
                                . "INNER JOIN il_dcl_field AS f ON (rf." . $this->db->quoteIdentifier('field_id') . " = f." . $this->db->quoteIdentifier('id') . ") " . "INNER JOIN il_dcl_table AS t ON (t." . $this->db->quoteIdentifier('id') . " = f." . $this->db->quoteIdentifier('table_id') . ") "
                                . "WHERE t." . $this->db->quoteIdentifier('obj_id') . " = " . $this->db->quote($dcl_obj_id, 'integer') . " " . "AND f.datatype_id IN ("
                                . implode(',', array_keys($dependencies)) . ") AND stloc2." . $this->db->quoteIdentifier('value') . " IS NOT NULL";
                        $set = $this->db->query($sql);
                        while ($rec = $this->db->fetchObject($set)) {
                                $dependencies[$rec->datatype_id]['ids'][] = (int)$rec->ext_id;
                        }
                }

                // Return external dependencies/IDs if there are any
                $return = array();
                if (count($dependencies[ilDclDatatype::INPUTFORMAT_FILE]['ids'])) {
                        $return[] = $dependencies[ilDclDatatype::INPUTFORMAT_FILE];
                }
                if (count($dependencies[ilDclDatatype::INPUTFORMAT_MOB]['ids'])) {
                        $return[] = $dependencies[ilDclDatatype::INPUTFORMAT_MOB];
                }

                return $return;
        }


        public function getXmlExportTailDependencies($a_entity, $a_target_release, $a_ids) {
                $page_object_ids = array();
                foreach ($a_ids as $dcl_obj_id) {
                        // If a DCL table has a detail view, we need to export the associated page objects!
                        $sql = "SELECT page_id FROM page_object "
                                . "WHERE parent_type = " . $this->db->quote('dclf', 'text') . " AND parent_id = " . $this->db->quote($dcl_obj_id, 'integer');
                        $set = $this->db->query($sql);
                        while ($rec = $this->db->fetchObject($set)) {
                                $page_object_ids[] = "dclf:" . $rec->page_id;
                        }
                }
                if (count($page_object_ids)) {
                        return array(
                                array(
                                        'component' => 'Services/COPage',
                                        'entity' => 'pg',
                                        'ids' => $page_object_ids,
                                )
                        );
                }

                return array();
        }
        
}

?>