class.ilECSCourseAttributes.php

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<?php
 
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
include_once './Services/WebServices/ECS/classes/Course/class.ilECSCourseAttribute.php';
 
class ilECSCourseAttributes
{
    private static $instances = null;
 
    private $server_id = 0;
    private $mid = 0;
    
    private $attributes = array();
    
    public function __construct($a_server_id, $a_mid)
    {
        $this->server_id = $a_server_id;
        $this->mid = $a_mid;
        
        $this->read();
    }
    
    public static function getInstance($a_server_id, $a_mid)
    {
        if (isset(self::$instances[$a_server_id . '_' . $a_mid])) {
            return self::$instances[$a_server_id . '_' . $a_mid];
        }
        return self::$instances[$a_server_id . '_' . $a_mid] = new ilECSCourseAttributes($a_server_id, $a_mid);
    }
    
    public function getAttributes()
    {
        return (array) $this->attributes;
    }
    
    public function getFirstAttribute()
    {
        foreach ($this->getAttributes() as $att) {
            return $att;
        }
        return null;
    }
    
    public function getFirstAttributeName()
    {
        if ($this->getFirstAttribute() instanceof ilECSCourseAttribute) {
            return $this->getFirstAttribute()->getName();
        }
        return '';
    }
    
    public function getAttributeSequence($a_last_attribute)
    {
        if (!$a_last_attribute) {
            return array();
        }
        $sequence = array();
        foreach ($this->getAttributes() as $att) {
            $sequence[] = $att->getName();
            if ($a_last_attribute == $att->getName()) {
                break;
            }
        }
        return $sequence;
    }
    
    public function getUpperAttributes($a_name)
    {
        $reverse_attributes = array_reverse($this->getAttributes());
        
        $found = false;
        $upper = array();
        foreach ($reverse_attributes as $att) {
            if ($att->getName() == $a_name) {
                $found = true;
                continue;
            }
            if ($found) {
                $upper[] = $att->getName();
            }
        }
        return array_reverse($upper);
    }
    
    public function getNextAttributeName($a_name)
    {
        if (!$a_name) {
            return $this->getFirstAttributeName();
        }
        $found = false;
        foreach ($this->getAttributes() as $att) {
            if ($a_name == $att->getName()) {
                $found = true;
                continue;
            }
            if ($found) {
                return $att->getName();
            }
        }
        return '';
    }
    
    public function getPreviousAttributeName($a_name)
    {
        if (!$a_name) {
            return '';
        }
        $found = false;
        $reverse_attributes = array_reverse($this->getAttributes());
        foreach ($reverse_attributes as $att) {
            if ($a_name == $att->getName()) {
                $found = true;
                continue;
            }
            if ($found) {
                return $att->getName();
            }
        }
        return '';
    }
 
    public function getAttributeValues()
    {
        $values = array();
        foreach ($this->getAttributes() as $att) {
            $values[] = $att->getName();
        }
        return $values;
    }
    
    public function delete()
    {
        foreach ($this->getAttributes() as $att) {
            $att->delete();
        }
        $this->attributes = array();
    }
 
 
    protected function read()
    {
        global $ilDB;
        
        $this->attributes = array();
        
        $query = 'SELECT * FROM ecs_crs_mapping_atts ' .
                'WHERE sid = ' . $ilDB->quote($this->server_id, 'integer') . ' ' .
                'AND mid = ' . $ilDB->quote($this->mid, 'integer') . ' ' .
                'ORDER BY id';
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $this->attributes[] = new ilECSCourseAttribute($row->id);
        }
    }
}