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<?php |
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namespace SteffenBrand\CurrCurr\Mapper; |
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use DateTime; |
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use Psr\Http\Message\ResponseInterface; |
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use SimpleXMLElement; |
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use SteffenBrand\CurrCurr\Exception\ExchangeRatesMappingFailedException; |
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use SteffenBrand\CurrCurr\Model\ExchangeRate; |
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class ExchangeRatesMapper implements MapperInterface |
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{ |
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/** |
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* @param ResponseInterface $response |
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* @return ExchangeRate[] |
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*/ |
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public function map(ResponseInterface $response): array |
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{ |
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$body = $response->getBody()->getContents(); |
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$xml = $this->parseBody($body); |
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$date = $this->parseDate($xml); |
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$exchangeRates = $this->parseExchangeRates($xml, $date); |
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return $exchangeRates; |
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} |
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/** |
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* @param string $body |
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* @return SimpleXMLElement |
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*/ |
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private function parseBody(string $body): SimpleXMLElement |
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{ |
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if (empty($body) === false) { |
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libxml_use_internal_errors(true); |
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$xml = simplexml_load_string($body); |
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$errors = libxml_get_errors(); |
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if (empty($errors) === true) { |
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return $xml; |
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} |
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} |
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throw new ExchangeRatesMappingFailedException(); |
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} |
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/** |
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* @param SimpleXMLElement $xml |
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* @return DateTime |
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*/ |
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private function parseDate(SimpleXMLElement $xml): DateTime |
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{ |
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$date = DateTime::createFromFormat('Y-m-d', $xml->Cube->Cube['time']); |
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if (false !== $date) { |
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$date->setTime(0, 0); |
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return $date; |
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} |
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throw new ExchangeRatesMappingFailedException(); |
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} |
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/** |
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* @param SimpleXMLElement $xml |
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* @param DateTime $date |
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* @return array |
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*/ |
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private function parseExchangeRates(SimpleXMLElement $xml, DateTime $date): array |
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{ |
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$exchangeRates = []; |
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foreach ($xml->Cube->Cube->Cube as $item) { |
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$currency = strval($item['currency']); |
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$rate = floatval($item['rate']); |
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$exchangeRates[$currency] = new ExchangeRate( |
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$currency, |
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$rate, |
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$date |
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); |
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} |
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return $exchangeRates; |
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} |
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} |
steffenbrand /
curr-curr
