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<?php
declare(strict_types=1);
namespace Chemaclass\StockTicker\Domain\Notifier\Policy\Condition;
use Chemaclass\StockTicker\Domain\Notifier\Policy\PolicyConditionInterface;
use Chemaclass\StockTicker\Domain\ReadModel\Company;
final class OlderWasFound implements PolicyConditionInterface
{
/**
* @var array<string,string>
* For example ['TickerSymbol' => 'datetime']
*/
private static array $cacheOldestBySymbol = [];
private string $companyKey;
private string $keyToCompare;
public function __construct(string $companyKey, string $keyToCompare = 'datetime')
$this->companyKey = $companyKey;
$this->keyToCompare = $keyToCompare;
}
public function __invoke(Company $company): bool
$current = $this->findLatestDateTimeFromNews($company);
$previous = self::$cacheOldestBySymbol[$company->symbol()->toString()] ?? '';
self::$cacheOldestBySymbol[$company->symbol()->toString()] = $current;
return $current > $previous;
private function findLatestDateTimeFromNews(Company $company): string
$reduced = array_reduce(
(array) $company->info($this->companyKey),
function (?array $carry, array $current): array {
if (null === $carry) {
null === $carry
false
return $current;
return $carry[$this->keyToCompare] > $current[$this->keyToCompare]
? $carry
: $current;
);
return $reduced[$this->keyToCompare];
Chemaclass /
stock-ticker
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