class.ilImport.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilImport
{
        protected $log;

        protected $install_id = "";
        protected $install_url = "";
        protected $entities = "";
        protected $tmp_import_dir = "";

        protected $mapping = null;
        protected $skip_entity = array();
        protected $configs = array();

        function __construct($a_target_id = 0)
        {
                include_once("./Services/Export/classes/class.ilImportMapping.php");
                $this->mapping = new ilImportMapping();
                $this->mapping->setTargetId($a_target_id);
                $this->log = ilLoggerFactory::getLogger('exp');
        }

        function getConfig($a_comp)
        {
                // if created, return existing config object
                if (isset($this->configs[$a_comp]))
                {
                        return $this->configs[$a_comp];
                }

                // create instance of export config object
                $comp_arr = explode("/", $a_comp);
                $a_class = "il".$comp_arr[1]."ImportConfig";
                $import_config_file = "./".$a_comp."/classes/class.".$a_class.".php";
                if (!is_file($import_config_file))
                {
                        include_once("./Services/Export/exceptions/class.ilImportException.php");
                        throw new ilImportException('Component "'.$a_comp.'" does not provide ImportConfig class.');
                }
                include_once($import_config_file);
                $imp_config = new $a_class();
                $this->configs[$a_comp] = $imp_config;

                return $imp_config;
        }

        public function getMapping()
        {
                return $this->mapping;
        }

        final function setEntityTypes($a_val)
        {
                $this->entity_types = $a_val;
        }
        
        final function getEntityTypes()
        {
                return $this->entity_types;
        }
        
        function addSkipEntity($a_component, $a_entity, $skip = true)
        {
                $this->skip_entity[$a_component][$a_entity] = $skip;
        }
        
        function setCurrentDataset($a_val)
        {
                $this->current_dataset = $a_val;
        }
        
        function getCurrentDataset()
        {
                return $this->current_dataset;
        }
        
        function afterEntityTypes()
        {
                $this->getCurrentDataset()->setImport($this);
        }

        function importRecord($a_entity, $a_types, $a_record)
        {
                $this->getCurrentDataset()->importRecord($a_entity, $a_types, $a_record);
        }
        
        
        final public function importEntity($a_tmp_file, $a_filename,
                $a_entity, $a_component, $a_copy_file = false)
        {
                $this->importObject(null, $a_tmp_file, $a_filename, $a_entity, $a_component, $a_copy_file);
        }
        
        
        final public function importObject($a_new_obj, $a_tmp_file, $a_filename, $a_type,
                $a_comp = "", $a_copy_file = false)
        {

                // create temporary directory
                $tmpdir = ilUtil::ilTempnam();
                ilUtil::makeDir($tmpdir);
                if ($a_copy_file)
                {
                        copy($a_tmp_file, $tmpdir."/".$a_filename);
                }
                else
                {
                        ilUtil::moveUploadedFile($a_tmp_file, $a_filename, $tmpdir."/".$a_filename);
                }

                $this->log->debug("unzip: ".$tmpdir."/".$a_filename);

                ilUtil::unzip($tmpdir."/".$a_filename);
                $dir = $tmpdir."/".substr($a_filename, 0, strlen($a_filename) - 4);

                $this->setTemporaryImportDir($dir);

                $this->log->debug("dir: ".$dir);

                $ret = $this->doImportObject($dir, $a_type, $a_comp, $tmpdir);
                $new_id = null;
                if(is_array($ret))
                {
                        $new_id = $ret['new_id'];
                }
                
                // delete temporary directory
                ilUtil::delDir($tmpdir);
                return $new_id;
        }

        function importFromDirectory($dir, $a_type, $a_comp)
        {
                $ret = $this->doImportObject($dir, $a_type, $a_comp);
                
                if(is_array($ret))
                {
                        return $ret['new_id'];
                }
                return null;
        }


        protected function setTemporaryImportDir($a_val)
        {
                $this->tmp_import_dir = $a_val;
        }

        public function getTemporaryImportDir()
        {
                return $this->tmp_import_dir;
        }
        
        protected function doImportObject($dir, $a_type, $a_component = "", $a_tmpdir = "")
        {               
                if ($a_component == "")
                {
                        include_once("./Services/Export/classes/class.ilImportExportFactory.php");
                        $a_component = ilImportExportFactory::getComponentForExport($a_type);           
                }               
                $this->comp = $a_component;

                // get import class
                $success = true;
                
                // process manifest file
                include_once("./Services/Export/classes/class.ilManifestParser.php");
                if (!is_file($dir."/manifest.xml"))
                {
                        include_once("./Services/Export/exceptions/class.ilManifestFileNotFoundImportException.php");
                        $mess = (DEVMODE)
                                ? 'Manifest file not found: "'.$dir."/manifest.xml".'".'
                                : 'Manifest file not found: "manifest.xml."';
                        $e = new ilManifestFileNotFoundImportException($mess);
                        $e->setManifestDir($dir);
                        $e->setTmpDir($a_tmpdir);
                        throw $e;
                }
                $parser = new ilManifestParser($dir."/manifest.xml");
                $this->mapping->setInstallUrl($parser->getInstallUrl());
                $this->mapping->setInstallId($parser->getInstallId());

                // check for correct type
                if ($parser->getMainEntity() != $a_type)
                {
                        include_once("./Services/Export/exceptions/class.ilImportObjectTypeMismatchException.php");
                        $e = new ilImportObjectTypeMismatchException("Object type does not match. Import file has type '".$parser->getMainEntity()."' but import being processed for '".$a_type."'.");
                        throw $e;
                }

                // process export files
                $expfiles = $parser->getExportFiles();
                
                include_once("./Services/Export/classes/class.ilExportFileParser.php");
                include_once("./Services/Export/classes/class.ilImportExportFactory.php");      
                $all_importers = array();
                foreach ($expfiles as $expfile)
                {                                                               
                        $comp = $expfile["component"];
                        $class = ilImportExportFactory::getImporterClass($comp);

                        $this->log->debug("create new class = $class");

                        $this->importer = new $class();
                        $this->importer->setImport($this);
                        $all_importers[] = $this->importer;
                        $this->importer->setImportDirectory($dir);
                        $this->importer->init();
                        $this->current_comp = $comp;
                        try {
                                $this->log->debug("Process file: ".$dir."/".$expfile["path"]);
                                $parser = new ilExportFileParser($dir."/".$expfile["path"],$this, "processItemXml");
                        }
                        catch(Exception $e)
                        {
                                $this->log->error("Import failed: ".$e->getMessage());
                                throw $e;
                        }
                }

                // write import ids before(!) final processing
                $obj_map = $this->getMapping()->getMappingsOfEntity('Services/Container', 'objs');
                if (is_array($obj_map))
                {
                        foreach ($obj_map as $obj_id_old => $obj_id_new)
                        {
                                ilObject::_writeImportId($obj_id_new, "il_".$this->mapping->getInstallId()."_".ilObject::_lookupType($obj_id_new)."_".$obj_id_old);
                        }
                }

                // final processing
                foreach ($all_importers as $imp)
                {
                        $this->log->debug("Call finalProcessing for: ".get_class($imp));
                        $imp->finalProcessing($this->mapping);
                }

                // we should only get on mapping here
                $top_mapping = $this->mapping->getMappingsOfEntity($this->comp, $a_type);
                $new_id = (int) current($top_mapping);
                return array(
                        'new_id' => $new_id,
                        'importers' => (array) $all_importers
                );
        }

        function processItemXml($a_entity, $a_schema_version, $a_id, $a_xml,$a_install_id, $a_install_url)
        {
                global $objDefinition;
                
                // skip
                if ($this->skip_entity[$this->current_comp][$a_entity])
                {
                        return;
                }

                if($objDefinition->isRBACObject($a_entity) &&
                        $this->getMapping()->getMapping('Services/Container', 'imported', $a_id))
                {
                        $this->log->info('Ignoring referenced '.$a_entity.' with id '.$a_id);
                        return;
                }
                $this->importer->setInstallId($a_install_id);
                $this->importer->setInstallUrl($a_install_url);
                $this->importer->setSchemaVersion($a_schema_version);
                $this->importer->setSkipEntities($this->skip_entity);
                $new_id = $this->importer->importXmlRepresentation($a_entity, $a_id, $a_xml, $this->mapping);

                // Store information about imported obj_ids in mapping to avoid double imports of references
                if($objDefinition->isRBACObject($a_entity))
                {
                        $this->getMapping()->addMapping('Services/Container', 'imported', $a_id, 1);
                }

                // @TODO new id is not always set
                if($new_id)
                {
                        $this->mapping->addMapping($this->comp ,$a_entity, $a_id, $new_id);
                }
        }
        
}
?>