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<?php |
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/* |
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* This file is part of the ONGR package. |
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* |
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* (c) NFQ Technologies UAB <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace ONGR\CurrencyExchangeBundle\Driver; |
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/** |
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* This class downloads exchange rates from openexchangerates.org. |
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*/ |
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class OpenExchangeRatesDriver implements CurrencyDriverInterface |
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{ |
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/** |
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* @var string |
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*/ |
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private $appId; |
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/** |
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* @var string |
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*/ |
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const REQUEST_URI = 'http://openexchangerates.org/api/latest.json?app_id=%s'; |
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/** |
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* @return string |
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*/ |
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public function getAppId() |
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{ |
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return $this->appId; |
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} |
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/** |
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* @param string $appId |
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*/ |
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public function setAppId($appId) |
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{ |
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$this->appId = $appId; |
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} |
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/** |
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* Downloads raw currency data. |
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* |
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* @return array |
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*/ |
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private function getRawData() |
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{ |
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$ch = curl_init(sprintf(self::REQUEST_URI, $this->appId)); |
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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if (($json = curl_exec($ch)) === false) { |
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return []; |
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} |
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curl_close($ch); |
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return json_decode($json, true); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRates() |
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{ |
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$response = $this->getRawData(); |
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// Validate response. |
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$valid = isset($response) && is_array($response) && isset($response['base']) && isset($response['rates']); |
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if (!$valid) { |
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throw new \UnexpectedValueException('Got invalid response'); |
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} |
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// Check if base currency is correct. |
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if ($response['base'] != $this->getBaseCurrency()) { |
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throw new \UnexpectedValueException( |
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sprintf( |
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'We expected to get values in base currency USD. Got %s', |
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$response['base'] |
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) |
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); |
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} |
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return $response['rates']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getBaseCurrency() |
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{ |
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return 'USD'; |
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} |
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} |
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ongr-io /
CurrencyExchangeBundle
