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<?php |
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/** |
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* @category Brownie/ExchangeRate |
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* @author Brownie <[email protected]> |
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* @license https://opensource.org/licenses/MIT |
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*/ |
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namespace Brownie\ExchangeRate\Source; |
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use Brownie\ExchangeRate\Service; |
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use Brownie\ExchangeRate\SourceInterface; |
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use Brownie\HttpClient\Request; |
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use Brownie\ExchangeRate\Model\ExchangeRate; |
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use Brownie\HttpClient\Exception\ClientException; |
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use Brownie\HttpClient\Exception\ValidateException; |
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use Brownie\ExchangeRate\Exception\InvalidExchangeRateException; |
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class BankOfCanada extends Service implements SourceInterface |
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{ |
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/** |
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* Base currency. |
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* |
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* @var string |
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*/ |
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protected $baseCode = 'CAD'; |
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/** |
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* The endpoint access to the list of exchange rate. |
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* |
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* @var string |
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*/ |
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private $endpoint = 'https://www.bankofcanada.ca/valet/observations/group/FX_RATES_DAILY/xml?recent=1'; |
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/** |
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* Returns the current exchange rate. |
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* |
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* @return ExchangeRate[] |
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* |
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* @throws ClientException |
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* @throws ValidateException |
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* @throws InvalidExchangeRateException |
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*/ |
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public function getExchangeRates() |
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{ |
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$response = $this |
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->getHttpClient() |
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->request( |
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$this |
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->getHttpClient() |
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->createRequest() |
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->setMethod(Request::HTTP_METHOD_GET) |
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->setUrl($this->endpoint) |
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); |
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if ((200 != $response->getHttpCode()) || (empty($response->getBody()))) { |
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throw new InvalidExchangeRateException('Invalid response from currency exchange server.'); |
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} |
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libxml_use_internal_errors(true); |
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$xml = simplexml_load_string($response->getBody()); |
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if (false === $xml) { |
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throw new InvalidExchangeRateException('Error parsing the response from the currency exchange server.'); |
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} |
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$exchangeRates = []; |
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foreach ($xml->observations->o->v as $e) { |
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$currencyCode = substr((string)$e->attributes()->s, 2, 3); |
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$exchangeRates[$currencyCode] = new ExchangeRate( |
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$this->getBaseCode(), |
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$currencyCode, |
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1 / (float)$e |
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); |
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} |
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$exchangeRates[$this->getBaseCode()] = new ExchangeRate( |
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$this->getBaseCode(), |
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$this->getBaseCode(), |
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1.0 |
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); |
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return $exchangeRates; |
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} |
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} |
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ossbrownie /
exchange-rate
