<?php

class Currency {

	private $code;

	private $currencies = array();



	public function __construct($registry) {

		$this->config = $registry->get('config');

		$this->db = $registry->get('db');

		$this->language = $registry->get('language');

		$this->request = $registry->get('request');

		$this->session = $registry->get('session');



		$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "currency");



		foreach ($query->rows as $result) {

			$this->currencies[$result['code']] = array(

				'currency_id'   => $result['currency_id'],

				'title'         => $result['title'],

				'symbol_left'   => $result['symbol_left'],

				'symbol_right'  => $result['symbol_right'],

				'decimal_place' => $result['decimal_place'],

				'value'         => $result['value']

			); 

		}



		if (isset($this->request->get['currency']) && (array_key_exists($this->request->get['currency'], $this->currencies))) {

			$this->set($this->request->get['currency']);

		} elseif ((isset($this->session->data['currency'])) && (array_key_exists($this->session->data['currency'], $this->currencies))) {

			$this->set($this->session->data['currency']);

		} elseif ((isset($this->request->cookie['currency'])) && (array_key_exists($this->request->cookie['currency'], $this->currencies))) {

			$this->set($this->request->cookie['currency']);

		} else {

			$this->set($this->config->get('config_currency'));

		}

	}



	public function set($currency) {

		$this->code = $currency;



		if (!isset($this->session->data['currency']) || ($this->session->data['currency'] != $currency)) {

			$this->session->data['currency'] = $currency;

		}



		if (!isset($this->request->cookie['currency']) || ($this->request->cookie['currency'] != $currency)) {

			setcookie('currency', $currency, time() + 60 * 60 * 24 * 30, '/', $this->request->server['HTTP_HOST']);

		}

	}



	public function format($number, $currency = '', $value = '', $format = true) {

		if ($currency && $this->has($currency)) {

			$symbol_left   = $this->currencies[$currency]['symbol_left'];

			$symbol_right  = $this->currencies[$currency]['symbol_right'];

			$decimal_place = $this->currencies[$currency]['decimal_place'];

		} else {

			$symbol_left   = $this->currencies[$this->code]['symbol_left'];

			$symbol_right  = $this->currencies[$this->code]['symbol_right'];

			$decimal_place = $this->currencies[$this->code]['decimal_place'];



			$currency = $this->code;

		}



		if ($value) {

			$value = $value;

		} else {

			$value = $this->currencies[$currency]['value'];

		}



		if ($value) {

			$value = (float)$number * $value;

		} else {

			$value = $number;

		}



		$string = '';



		if (($symbol_left) && ($format)) {

			$string .= $symbol_left;

		}



		if ($format) {

			$decimal_point = $this->language->get('decimal_point');

		} else {

			$decimal_point = '.';

		}



		if ($format) {

			$thousand_point = $this->language->get('thousand_point');

		} else {

			$thousand_point = '';

		}



		$string .= number_format(round($value, (int)$decimal_place), (int)$decimal_place, $decimal_point, $thousand_point);



		if (($symbol_right) && ($format)) {

			$string .= $symbol_right;

		}



		return $string;

	}



	public function convert($value, $from, $to) {

		if (isset($this->currencies[$from])) {

			$from = $this->currencies[$from]['value'];

		} else {

			$from = 0;

		}



		if (isset($this->currencies[$to])) {

			$to = $this->currencies[$to]['value'];

		} else {

			$to = 0;

		}



		return $value * ($to / $from);

	}



	public function getId($currency = '') {

		if (!$currency) {

			return $this->currencies[$this->code]['currency_id'];

		} elseif ($currency && isset($this->currencies[$currency])) {

			return $this->currencies[$currency]['currency_id'];

		} else {

			return 0;

		}

	}



	public function getSymbolLeft($currency = '') {

		if (!$currency) {

			return $this->currencies[$this->code]['symbol_left'];

		} elseif ($currency && isset($this->currencies[$currency])) {

			return $this->currencies[$currency]['symbol_left'];

		} else {

			return '';

		}

	}



	public function getSymbolRight($currency = '') {

		if (!$currency) {

			return $this->currencies[$this->code]['symbol_right'];

		} elseif ($currency && isset($this->currencies[$currency])) {

			return $this->currencies[$currency]['symbol_right'];

		} else {

			return '';

		}

	}



	public function getDecimalPlace($currency = '') {

		if (!$currency) {

			return $this->currencies[$this->code]['decimal_place'];

		} elseif ($currency && isset($this->currencies[$currency])) {

			return $this->currencies[$currency]['decimal_place'];

		} else {

			return 0;

		}

	}



	public function getCode() {

		return $this->code;

	}



	public function getValue($currency = '') {

		if (!$currency) {

			return $this->currencies[$this->code]['value'];

		} elseif ($currency && isset($this->currencies[$currency])) {

			return $this->currencies[$currency]['value'];

		} else {

			return 0;

		}

	}



	public function has($currency) {

		return isset($this->currencies[$currency]);

	}

}

?>