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);
                }
        }
}
?>