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EuropeanCentralBank search previous days rate, if no exist requested … #162

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EuropeanCentralBank search previous days rate, if no exist requested … #162

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35 changes: 23 additions & 12 deletions src/Service/EuropeanCentralBank.php
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,10 @@

namespace Exchanger\Service;

use DateInterval;
use DateTime;
use DateTimeInterface;
use Exception;
use Exchanger\Contract\ExchangeRateQuery;
use Exchanger\Contract\HistoricalExchangeRateQuery;
use Exchanger\Exception\UnsupportedCurrencyPairException;
Expand All @@ -29,11 +33,11 @@ final class EuropeanCentralBank extends HttpService
{
use SupportsHistoricalQueries;

const DAILY_URL = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml';
private const DAILY_URL = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml';

const HISTORICAL_URL_LIMITED_TO_90_DAYS_BACK = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml';
private const HISTORICAL_URL_LIMITED_TO_90_DAYS_BACK = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml';

const HISTORICAL_URL_OLDER_THAN_90_DAYS = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist.xml';
private const HISTORICAL_URL_OLDER_THAN_90_DAYS = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist.xml';

/**
* {@inheritdoc}
Expand All @@ -48,7 +52,7 @@ protected function getLatestExchangeRate(ExchangeRateQuery $exchangeQuery): Exch

$quoteCurrency = $currencyPair->getQuoteCurrency();
$elements = $element->xpath('//xmlns:Cube[@currency="'.$quoteCurrency.'"]/@rate');
$date = new \DateTime((string) $element->xpath('//xmlns:Cube[@time]/@time')[0]);
$date = new DateTime((string) $element->xpath('//xmlns:Cube[@time]/@time')[0]);

if (empty($elements) || !$date) {
throw new UnsupportedCurrencyPairException($currencyPair, $this);
Expand All @@ -72,13 +76,20 @@ protected function getHistoricalExchangeRate(HistoricalExchangeRateQuery $exchan
$formattedDate = $exchangeQuery->getDate()->format('Y-m-d');
$quoteCurrency = $currencyPair->getQuoteCurrency();

$elements = $element->xpath('//xmlns:Cube[@time="'.$formattedDate.'"]/xmlns:Cube[@currency="'.$quoteCurrency.'"]/@rate');

if (empty($elements)) {
if (empty($element->xpath('//xmlns:Cube[@time="'.$formattedDate.'"]'))) {
$prevDays = 0;
while (empty($element->xpath('//xmlns:Cube[@time="'.$formattedDate.'"]'))) {
$prevDays ++;
if ($prevDays > 7) {
throw new UnsupportedDateException($exchangeQuery->getDate(), $this);
}
$formattedDate = $exchangeQuery
->getDate()
->sub(new DateInterval('P'.$prevDays.'D'))
->format('Y-m-d');
}
$elements = $element->xpath('//xmlns:Cube[@time="'.$formattedDate.'"]/xmlns:Cube[@currency="'.$quoteCurrency.'"]/@rate');

if (empty($elements)) {
throw new UnsupportedCurrencyPairException($currencyPair, $this);
}

Expand All @@ -102,15 +113,15 @@ public function getName(): string
}

/**
* @param \DateTimeInterface $date
* @param DateTimeInterface $date
*
* @return string
*
* @throws \Exception
* @throws Exception
*/
private function getHistoricalUrl(\DateTimeInterface $date): string
private function getHistoricalUrl(DateTimeInterface $date): string
{
$dateDiffInDays = $date->diff(new \DateTime('now'))->days;
$dateDiffInDays = $date->diff(new DateTime('now'))->days;
if ($dateDiffInDays > 90) {
return self::HISTORICAL_URL_OLDER_THAN_90_DAYS;
}
Expand Down