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Copy pathConfigMerge.php
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60 lines (49 loc) · 1.48 KB
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<?php
declare(strict_types=1);
namespace Infocyph\ArrayKit\Config;
final class ConfigMerge
{
private function __construct() {}
public static function isMap(mixed $value): bool
{
return is_array($value) && !array_is_list($value);
}
/**
* Recursively overlay configuration maps while replacing list values atomically.
*
* @param array<array-key, mixed> $base
* @param array<array-key, mixed> $overlay
* @return array<array-key, mixed>
*/
public static function merge(array $base, array $overlay): array
{
foreach ($overlay as $key => $value) {
if (
array_key_exists($key, $base)
&& self::isMap($base[$key])
&& self::isMap($value)
) {
/** @var array<array-key, mixed> $baseValue */
$baseValue = $base[$key];
/** @var array<array-key, mixed> $overlayValue */
$overlayValue = $value;
$base[$key] = self::merge($baseValue, $overlayValue);
continue;
}
$base[$key] = $value;
}
return $base;
}
/**
* @param iterable<array<array-key, mixed>> $layers
* @return array<array-key, mixed>
*/
public static function mergeMany(iterable $layers): array
{
$merged = [];
foreach ($layers as $layer) {
$merged = self::merge($merged, $layer);
}
return $merged;
}
}