class.ilExportOptions.php

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<?php
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilExportOptions
{
    private static $instance = null;
    
    const EXPORT_EXISTING = 1;
    const EXPORT_BUILD = 2;
    const EXPORT_OMIT = 3;
    
    const KEY_INIT = 1;
    const KEY_ITEM_MODE = 2;
    const KEY_ROOT = 3;
    
    private $export_id = 0;
    private $ref_options = array();
    private $obj_options = array();
    private $options = array();
    
    private function __construct($a_export_id)
    {
        $this->export_id = $a_export_id;
        $this->read();
    }
    
    public static function getInstance()
    {
        if (self::$instance) {
            return self::$instance;
        }
    }
    
    public static function newInstance($a_export_id)
    {
        return self::$instance = new ilExportOptions($a_export_id);
    }
    
    public static function allocateExportId()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        // get last export id
        $query = 'SELECT MAX(export_id) exp FROM export_options ' .
            'GROUP BY export_id ';
        $res = $ilDB->query($query);
        $exp_id = 1;
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $exp_id = $row->exp + 1;
        }
        $query = 'INSERT INTO export_options (export_id,keyword,ref_id,obj_id,value) ' .
            'VALUES( ' .
            $ilDB->quote($exp_id, 'integer') . ', ' .
            $ilDB->quote(self::KEY_INIT, 'integer') . ', ' .
            $ilDB->quote(0, 'integer') . ', ' .
            $ilDB->quote(0, 'integer') . ', ' .
            $ilDB->quote(0, 'integer') . ' ' .
            ')';
        $ilDB->manipulate($query);

        return $exp_id;
    }
    
    public function getSubitemsForCreation($a_source_id)
    {
        $refs = array();

        foreach ((array) $this->ref_options[self::KEY_ITEM_MODE] as $ref_id => $mode) {
            if ($mode == self::EXPORT_BUILD) {
                $refs[] = $ref_id;
            }
        }
        return $refs;
    }
    
    public function getSubitemsForExport()
    {
        $refs = array();
        foreach ((array) $this->ref_options[self::KEY_ITEM_MODE] as $ref_id => $mode) {
            if ($mode != self::EXPORT_OMIT) {
                $refs[] = $ref_id;
            }
        }
        return $refs;
    }
    
    public function getExportId()
    {
        return $this->export_id;
    }
    
    public function addOption($a_keyword, $a_ref_id, $a_obj_id, $a_value)
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "SELECT MAX(pos) position FROM export_options";
        $res = $ilDB->query($query);
        
        $pos = 0;
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $pos = $row->position;
        }
        $pos++;
        
        $query = 'INSERT INTO export_options (export_id,keyword,ref_id,obj_id,value,pos) ' .
            'VALUES( ' .
            $ilDB->quote($this->getExportId(), 'integer') . ', ' .
            $ilDB->quote($a_keyword, 'integer') . ', ' .
            $ilDB->quote($a_ref_id, 'integer') . ', ' .
            $ilDB->quote($a_obj_id, 'integer') . ', ' .
            $ilDB->quote($a_value, 'integer') . ', ' .
            $ilDB->quote($pos, 'integer') . ' ' .
            ')';
        $ilDB->manipulate($query);
    }

    public function getOption($a_keyword)
    {
        return isset($this->options[$a_keyword]) ? $this->options[$a_keyword] : null;
    }
    
    public function getOptionByObjId($a_obj_id, $a_keyword)
    {
        return isset($this->obj_options[$a_keyword][$a_obj_id]) ? $this->obj_options[$a_keyword][$a_obj_id] : null;
    }
    
    public function getOptionByRefId($a_ref_id, $a_keyword)
    {
        return isset($this->ref_options[$a_keyword][$a_ref_id]) ? $this->ref_options[$a_keyword][$a_ref_id] : null;
    }
    
    public function delete()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "DELETE FROM export_options " .
            "WHERE export_id = " . $ilDB->quote($this->getExportId(), 'integer');
        $ilDB->manipulate($query);
        return true;
    }

    public function read()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $this->options = array();
        $this->obj_options = array();
        $this->ref_options = array();
        
        $query = "SELECT * FROM export_options " .
            "WHERE export_id = " . $ilDB->quote($this->getExportId(), 'integer') . ' ' .
            "ORDER BY pos";
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            if ($row->ref_id) {
                $this->ref_options[$row->keyword][$row->ref_id] = $row->value;
            }
            if ($row->obj_id) {
                $this->obj_options[$row->keyword][$row->obj_id] = $row->value;
            }
            if (!$row->ref_id and !$row->obj_id) {
                $this->options[$row->keyword] = $row->value;
            }
        }
        return true;
    }
}