class.ilPaymentCurrency.php

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<?php
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */
class ilPaymentCurrency
{
         
        private $currency_id;
        private $unit;
        private $iso_code;
        private $symbol;
        private $conversion_rate;

        public function ilPaymentCurrency($a_currency_id = '')
        {
                global $ilDB;
                
                $this->db = $ilDB;
                
                $this->currency_id = $a_currency_id;
                
        }
        
        
        public function setCurrencyId($a_currency_id)
        {
                $this->currency_id = $a_currency_id;
        }
        public function getCurrencyId()
        {
                return $this->currency_id;
        }       

        public function setUnit($a_unit)
        {
                $this->unit = $a_unit;
        }
        public function getUnit()
        {
                return $this->unit;
        }
        public function setIsoCode($a_iso_code)
        {
                $this->iso_code = $a_iso_code;
        }
        public function getIsoCode()
        {
                return $this->iso_code;
        }
                
        public function setSymbol($a_symbol)
        {
                $this->symbol = $a_symbol;
        }
        public function getSymbol()
        {
                return $this->symbol;
        }
        public function setConversionRate($a_conversion_rate)
        {
                $this->conversion_rate = (float)$a_conversion_rate;
        }
        public function getConversionRate()
        {
                return $this->conversion_rate;
        }
                        
        public function addCurrency()
        {
                $nextId = $this->db->nextID('payment_currencies');
                
                $this->db->manipulateF('INSERT INTO payment_currencies
                (currency_id, unit, iso_code, symbol, conversion_rate) 
                VALUES (%s, %s, %s, %s, %s)',
                array('integer', 'text','text','text','float'),
                array($nextId, $this->getUnit(), $this->getIsoCode(), $this->getSymbol(), $this->getConversionRate()));
                return true;
        }
        
        public function deleteCurrency()
        {
                $this->db->manipulateF('DELETE FROM payment_currencies WHERE currency_id = %s',
                array('integer'), array($this->getCurrencyId()));
                
        }
        public function updateCurrency()
        {
                $this->db->manipulateF('UPDATE payment_currencies 
                SET unit = %s,  
                        iso_code = %s,
                        symbol = %s,
                        conversion_rate = %s
                WHERE currency_id = %s',
                array('text','text','text','float','integer'), 
                array($this->getUnit(), $this->getIsoCode(), $this->getSymbol(), 
                        $this->getConversionRate(), $this->getCurrencyId()));
        }
        
        public static function _getAvailableCurrencies()
        {
                global $ilDB;

                $res = $ilDB->query('SELECT * FROM payment_currencies');

                
                while($row = $ilDB->fetchAssoc($res))
                {
                        $currencies[$row['currency_id']] = $row;
/*                      $currencies[$row->currency_id]['currency_id']           = $row->currency_id;
                        $currencies[$row->currency_id]['unit']                          = $row->unit;
                        $currencies[$row->currency_id]['iso_code']                      = $row->subunit;
                        */
                }
                return $currencies ? $currencies : array();
        }
        
        public static function _getCurrency($a_currency_id)
        {
                global $ilDB;

                $res = $ilDB->queryf('
                        SELECT * FROM payment_currencies WHERE currency_id = %s',
                        array('integer'), array($a_currency_id));

                
                while($row = $ilDB->fetchAssoc($res))
                {
                        $currencies[$row['currency_id']] = $row;
        
        /*      while($row = $ilDB->fetchObject($res))
                {
                        $currencies['currency_id']              = $row->currency_id;
                        $currencies['unit']                             = $row->unit;
                        $currencies['subunit']                  = $row->subunit;*/
                }
                return $currencies;
        }
        
        public static function _getUnit($a_currency_id)
        {
                global $ilDB;

                $res = $ilDB->queryf('
                        SELECT unit FROM payment_currencies WHERE currency_id = %s',
                        array('integer'), array($a_currency_id));
                
                while($row = $ilDB->fetchObject($res))
                {
                        return $row->unit;
                }
                return false;
        }
        
        public static function _getSymbol($a_currency_id)
        {
                global $ilDB;

                $res = $ilDB->queryf('
                        SELECT symbol FROM payment_currencies WHERE currency_id = %s',
                        array('integer'), array($a_currency_id));
                
                while($row = $ilDB->fetchObject($res))
                {
                        return $row->symbol;
                }
                return false;
        }
        
        public static function _getConversionRate($a_currency_id)
        {
                global $ilDB;
                
                $res = $ilDB->queryF('
                        SELECT conversion_rate FROM payment_currencies WHERE currency_id = %s',
                                        array('integer'), array($a_currency_id));
                                        
                while($row = $ilDB->fetchObject($res))
                {
                        return (float)$row->conversion_rate;
                }
                return false;                   
        }
        public static function _getCurrencyBySymbol($a_currency_symbol)
        {
                global $ilDB;

                $res = $ilDB->queryF('SELECT * FROM payment_currencies WHERE symbol = %s',
                array('text'), array($a_currency_symbol));
                $row = $ilDB->fetchAssoc($res);

                return $row;
        }
        
        public static function _getDefaultCurrency()
        {
                global $ilDB;

                $res = $ilDB->query('SELECT * FROM payment_currencies WHERE is_default = 1');
                $row = $ilDB->fetchAssoc($res);

                return $row;
        }
        
        public static function _updateIsDefault($a_currency_id)
        {
                global $ilDB;

                // calculate other currencies to default_currency
                $conversion_rate = self::_getConversionRate($a_currency_id);
                $currencies = self::_getAvailableCurrencies();

                foreach ($currencies as $tmp_cur)
                {
                        //calculate conversion rates
                        $con_result = round((float)$tmp_cur['conversion_rate'] / (float)$conversion_rate, 4);
                        
                        $upd = $ilDB->update('payment_currencies',
                                array( 'conversion_rate' => array('float', $con_result),        
                                                'is_default' => array('integer', 0)),
                                array('currency_id' => array('integer', $tmp_cur['currency_id'])));
                }
                $new_default = $ilDB->update('payment_currencies',
                        array( 'is_default' => array('integer', 1)),
                        array('currency_id' => array('integer', $a_currency_id)));
        }
        
        static public function _getDecimalSeparator()
        { 
                global $ilUser; 

                $user_lang = $ilUser->getLanguage();
                
                // look for ISO 639-1  
                $comma_countries = array(
                'sq','es','fr','pt', 'bg','de','da','et','fo','fi','el','id','is','it',
                'hr','lv','lt','lb','mk','mo','nl','no','pl','pt','ro','ru','sv','sr',
                'sk','sl','af','ce','cs','tr','uk','hu');               

                in_array($user_lang, $comma_countries) ? $separator = ',' : $separator = '.';
                
                return $separator;
        }
        
        public static function _formatPriceToString($a_price, $a_currency_symbol = false)
        {
                if(!$a_currency_symbol)
                {
                        $currency_obj = $_SESSION['payment_currency'];
                        $currency_symbol = $currency_obj['symbol'];
                }
                else $currency_symbol = $a_currency_symbol;
                $separator = ilPaymentCurrency::_getDecimalSeparator();
                
                $price_string = number_format($a_price,'2',$separator,'');
                
                return $price_string . ' ' . $currency_symbol;
        }

        public static function _isDefault($a_currency_id)
        {
                global $ilDB;

                $res = $ilDB->queryF('SELECT is_default FROM payment_currencies WHERE currency_id = %s',
                                array('integer'), array((int)$a_currency_id));

                $row = $ilDB->fetchAssoc($res);

                if($row['is_default'] == '1') {
                        return true;
                }else
                         return false;
                        
        }
}

?>