class.ilPCFileList.php

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<?php

/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */


require_once("./Services/COPage/classes/class.ilPageContent.php");

class ilPCFileList extends ilPageContent
{
        var $list_node;

        function init()
        {
                $this->setType("flst");
        }

        function setNode(&$a_node)
        {
                parent::setNode($a_node);               // this is the PageContent node
                $this->list_node =& $a_node->first_child();             // this is the Table node
        }

        function create(&$a_pg_obj, $a_hier_id, $a_pc_id = "")
        {
                $this->node = $this->createPageContentNode();
                $a_pg_obj->insertContent($this, $a_hier_id, IL_INSERT_AFTER, $a_pc_id);
                $this->list_node =& $this->dom->create_element("FileList");
                $this->list_node =& $this->node->append_child($this->list_node);
        }

        /*
        function addItems($a_nr)
        {
                for ($i=1; $i<=$a_nr; $i++)
                {
                        $new_item =& $this->dom->create_element("ListItem");
                        $new_item =& $this->list_node->append_child($new_item);
                }
        }*/

        function appendItem($a_id, $a_location, $a_format)
        {
                // File Item
                $new_item =& $this->dom->create_element("FileItem");
                $new_item =& $this->list_node->append_child($new_item);

                // Identifier
                $id_node =& $this->dom->create_element("Identifier");
                $id_node =& $new_item->append_child($id_node);
                $id_node->set_attribute("Catalog", "ILIAS");
                $id_node->set_attribute("Entry", "il__file_".$a_id);

                // Location
                $loc_node =& $this->dom->create_element("Location");
                $loc_node =& $new_item->append_child($loc_node);
                $loc_node->set_attribute("Type", "LocalFile");
                $loc_node->set_content($a_location);

                // Format
                $form_node =& $this->dom->create_element("Format");
                $form_node =& $new_item->append_child($form_node);
                $form_node->set_content($a_format);
        }

        function setListTitle($a_title, $a_language)
        {
                ilDOMUtil::setFirstOptionalElement($this->dom,
                        $this->list_node, "Title", array("FileItem"),
                        $a_title, array("Language" => $a_language));
        }

        function getListTitle()
        {
                $chlds =& $this->list_node->child_nodes();
                for($i=0; $i<count($chlds); $i++)
                {
                        if ($chlds[$i]->node_name() == "Title")
                        {
                                return $chlds[$i]->get_content();
                        }
                }
                return "";
        }

        function getLanguage()
        {
                $chlds =& $this->list_node->child_nodes();
                for($i=0; $i<count($chlds); $i++)
                {
                        if ($chlds[$i]->node_name() == "Title")
                        {
                                return $chlds[$i]->get_attribute("Language");
                        }
                }
                return "";
        }
        
        function getFileList()
        {
                $files = array();
                
                // File Item
                $childs = $this->list_node->child_nodes();
                for ($i=0; $i<count($childs); $i++)
                {
                        if ($childs[$i]->node_name() == "FileItem")
                        {
                                $id = $entry = "";
                                $pc_id = $childs[$i]->get_attribute("PCID");
                                $hier_id = $childs[$i]->get_attribute("HierId");
                                $class = $childs[$i]->get_attribute("Class");
                                
                                // Identifier
                                $id_node = $childs[$i]->first_child();
                                if ($id_node->node_name() == "Identifier")
                                {
                                        $entry = $id_node->get_attribute("Entry");
                                        if (substr($entry, 0, 9) == "il__file_")
                                        {
                                                $id = substr($entry, 9);
                                        }
                                }
                                $files[] = array("entry" => $entry, "id" => $id,
                                        "pc_id" => $pc_id, "hier_id" => $hier_id,
                                        "class" => $class);
                        }
                }
                
                return $files;
        }

        function deleteFileItems($a_ids)
        {
                $files = array();
                
                // File Item
                $childs = $this->list_node->child_nodes();

                for ($i=0; $i<count($childs); $i++)
                {
                        if ($childs[$i]->node_name() == "FileItem")
                        {
                                $id = $entry = "";
                                $pc_id = $childs[$i]->get_attribute("PCID");
                                $hier_id = $childs[$i]->get_attribute("HierId");
                                
                                if (in_array($hier_id.":".$pc_id, $a_ids))
                                {
                                        $childs[$i]->unlink($childs[$i]);
                                }
                        }
                }
        }

        function savePositions($a_pos)
        {
                asort($a_pos);
                
                // File Item
                $childs = $this->list_node->child_nodes();
                $nodes = array();
                for ($i=0; $i<count($childs); $i++)
                {
                        if ($childs[$i]->node_name() == "FileItem")
                        {
                                $id = $entry = "";
                                $pc_id = $childs[$i]->get_attribute("PCID");
                                $hier_id = $childs[$i]->get_attribute("HierId");
                                $nodes[$hier_id.":".$pc_id] = $childs[$i];
                                $childs[$i]->unlink($childs[$i]);
                        }
                }
                
                foreach($a_pos as $k => $v)
                {
                        if (is_object($nodes[$k]))
                        {
                                $nodes[$k] = $this->list_node->append_child($nodes[$k]);
                        }
                }
        }

        function getAllClasses()
        {
                $classes = array();
                
                // File Item
                $childs = $this->list_node->child_nodes();

                for ($i=0; $i<count($childs); $i++)
                {
                        if ($childs[$i]->node_name() == "FileItem")
                        {
                                $classes[$childs[$i]->get_attribute("HierId").":".
                                        $childs[$i]->get_attribute("PCID")] = $childs[$i]->get_attribute("Class");
                        }
                }
                
                return $classes;
        }

        function saveStyleClasses($a_class)
        {
                // File Item
                $childs = $this->list_node->child_nodes();
                for ($i=0; $i<count($childs); $i++)
                {
                        if ($childs[$i]->node_name() == "FileItem")
                        {
                                $childs[$i]->set_attribute("Class",
                                        $a_class[$childs[$i]->get_attribute("HierId").":".
                                        $childs[$i]->get_attribute("PCID")]);
                        }
                }
        }

        static function getLangVars()
        {
                return array("ed_edit_files", "ed_insert_filelist", "pc_flist");
        }

        static function afterPageUpdate($a_page, DOMDocument $a_domdoc, $a_xml, $a_creation)
        {
                if (!$a_page->getImportMode())
                {
                        // pc filelist
                        include_once("./Modules/File/classes/class.ilObjFile.php");
                        $file_ids = ilObjFile::_getFilesOfObject(
                                $a_page->getParentType().":pg", $a_page->getId(), 0, $a_page->getLanguage());
                        self::saveFileUsage($a_page, $a_domdoc);

                        foreach($file_ids as $file)     // check, whether file object can be deleted
                        {
                                if (ilObject::_exists($file) && ilObject::_lookupType($file) == "file")
                                {
                                        $file_obj = new ilObjFile($file, false);
                                        $usages = $file_obj->getUsages();
                                        if (count($usages) == 0)        // delete, if no usage exists
                                        {
                                                if ($file_obj->getMode() == "filelist")         // non-repository object
                                                {
                                                        $file_obj->delete();
                                                }
                                        }
                                }
                        }
                }

        }
        
        static function beforePageDelete($a_page)
        {
                $files = self::collectFileItems($a_page, $a_page->getDomDoc());
                
                // delete all file usages
                include_once("./Modules/File/classes/class.ilObjFile.php");
                ilObjFile::_deleteAllUsages($a_page->getParentType().":pg", $a_page->getId(), false,
                        $a_page->getLanguage());

                include_once("./Modules/File/classes/class.ilObjFile.php");
                foreach ($files as $file_id)
                {
                        if (ilObject::_exists($file_id))
                        {
                                $file_obj = new ilObjFile($file_id, false);
                                $file_obj->delete();
                        }
                }
        }

        static function afterPageHistoryEntry($a_page, DOMDocument $a_old_domdoc, $a_old_xml, $a_old_nr)
        {
                self::saveFileUsage($a_page, $a_old_domdoc, $a_old_nr);
        }

        static function saveFileUsage($a_page, $a_domdoc, $a_old_nr = 0)
        {
                $file_ids = self::collectFileItems($a_page, $a_domdoc);
                include_once("./Modules/File/classes/class.ilObjFile.php");
                ilObjFile::_deleteAllUsages($a_page->getParentType().":pg", $a_page->getId(), $a_old_nr, $a_page->getLanguage());
                foreach($file_ids as $file_id)
                {
                        ilObjFile::_saveUsage($file_id, $a_page->getParentType().":pg", $a_page->getId(), $a_old_nr,
                                $a_page->getLanguage());
                }
        }

        static function collectFileItems($a_page, $a_domdoc)
        {
                $xpath = new DOMXPath($a_domdoc);
                $nodes = $xpath->query('//FileItem/Identifier');        
                $file_ids = array();
                foreach($nodes as $node)
                {
                        $id_arr = explode("_", $node->getAttribute("Entry"));
                        $file_id = $id_arr[count($id_arr) - 1];
                        if ($file_id > 0 && ($id_arr[1] == "" || $id_arr[1] == IL_INST_ID || $id_arr[1] == 0))
                        {
                                $file_ids[$file_id] = $file_id;
                        }
                }
                // file items in download links
                $xpath = new DOMXPath($a_domdoc);
                $nodes = $xpath->query("//IntLink[@Type='File']");      
                foreach($nodes as $node)
                {
                        $t = $node->getAttribute("Target");
                        if (substr($t, 0, 9) == "il__dfile")
                        {
                                $id_arr = explode("_", $t);
                                $file_id = $id_arr[count($id_arr) - 1];
                                $file_ids[$file_id] = $file_id;
                        }
                }
                return $file_ids;
        }

}
?>