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<?php
declare(strict_types=1);
namespace Dotenv\Store\File;
use Dotenv\Exception\InvalidEncodingException;
use Dotenv\Util\Str;
use PhpOption\Option;
/**
* @internal
*/
final class Reader
{
/**
* This class is a singleton.
*
* @codeCoverageIgnore
*
* @return void
*/
private function __construct()
{
//
}
/**
* Read the file(s), and return their raw content.
*
* We provide the file path as the key, and its content as the value. If
* short circuit mode is enabled, then the returned array with have length
* at most one. File paths that couldn't be read are omitted entirely.
*
* @param string[] $filePaths
* @param bool $shortCircuit
* @param string|null $fileEncoding
*
* @throws \Dotenv\Exception\InvalidEncodingException
*
* @return array<string,string>
*/
public static function read(array $filePaths, bool $shortCircuit = true, string $fileEncoding = null)
{
$output = [];
foreach ($filePaths as $filePath) {
$content = self::readFromFile($filePath, $fileEncoding);
if ($content->isDefined()) {
$output[$filePath] = $content->get();
if ($shortCircuit) {
break;
}
}
}
return $output;
}
/**
* Read the given file.
*
* @param string $path
* @param string|null $encoding
*
* @throws \Dotenv\Exception\InvalidEncodingException
*
* @return \PhpOption\Option<string>
*/
private static function readFromFile(string $path, string $encoding = null)
{
/** @var Option<string> */
$content = Option::fromValue(@\file_get_contents($path), false);
return $content->flatMap(static function (string $content) use ($encoding) {
return Str::utf8($content, $encoding)->mapError(static function (string $error) {
throw new InvalidEncodingException($error);
})->success();
});
}
}
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