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<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Currency PHP library
*
**/
class Currency
{
/**
* Constructor
*
* @access public
* @param array
*/
public function __construct()
{
$this->ci =& get_instance();
}
/**
* Update Exchange Rates
*
* @access public
*/
public function updateExchangeRates($base = "USD", $service = "fixer", $serviceKey = "")
{
$arrayExchangeRates = array();
if ($service == "fixer" && !empty($serviceKey)) {
$arrayExchangeRates = $this->fixerIoExchangeRates($base, $serviceKey);
} elseif ($service == "currencyapi" && !empty($serviceKey)) {
$arrayExchangeRates = $this->currencyApiNetExchangeRates($base, $serviceKey);
} elseif ($service == "openexchangerates" && !empty($serviceKey)) {
$arrayExchangeRates = $this->openExchangeRatesExchangeRates($base, $serviceKey);
}
if (!empty($arrayExchangeRates)) {
foreach ($arrayExchangeRates as $arrayExchangeRate) {
if (isset($arrayExchangeRate['currency']) && isset($arrayExchangeRate['rate'])) {
$this->ci->db->where('code', clean_str($arrayExchangeRate['currency']))->update('currencies', ['exchange_rate' => $arrayExchangeRate['rate']]);
}
}
}
}
/**
* fixer.io Currency Converter
*
* @access private
*/
private function fixerIoExchangeRates($base, $serviceKey)
{
$ch = curl_init('http://data.fixer.io/api/latest?access_key=' . $serviceKey . '');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
return $this->createRatesArray($response, $base);
}
/**
* currencyapi.net Currency Converter
*
* @access private
*/
private function currencyApiNetExchangeRates($base, $serviceKey)
{
$ch = curl_init('https://currencyapi.net/api/v1/rates?key=' . $serviceKey . '&base=USD');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
return $this->createRatesArray($response, $base);
}
/**
* openexchangerates.org Currency Converter
*
* @access private
*/
private function openExchangeRatesExchangeRates($base, $serviceKey)
{
$ch = curl_init('https://openexchangerates.org/api/latest.json?app_id=' . $serviceKey . '&base=USD');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
return $this->createRatesArray($response, $base);
}
/**
* openexchangerates.org Currency Converter
*
* @access private
*/
private function createRatesArray($response, $base)
{
$arrayRates = array();
if (!empty($response)) {
$responseObject = json_decode($response);
if (!empty($responseObject) && isset($responseObject->rates)) {
$rates = $responseObject->rates;
if (isset($rates->$base)) {
$baseRate = $rates->$base;
foreach ($rates as $key => $value) {
$calculatedRate = 1;
if (!empty($baseRate)) {
$rate = $value / $baseRate;
if (empty($rate)) {
$rate = 1;
}
$calculatedRate = number_format($rate, 8, '.', '');
}
$item = array(
'currency' => $key,
'rate' => $calculatedRate
);
array_push($arrayRates, $item);
}
}
}
}
return $arrayRates;
}
}
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