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<?php
declare (strict_types=1);
namespace Rector\Core\Util;
final class ArrayParametersMerger
{
/**
* Merges configurations. Left has higher priority than right one.
*
* @autor David Grudl (https://davidgrudl.com)
* @source https://github.com/nette/di/blob/8eb90721a131262f17663e50aee0032a62d0ef08/src/DI/Config/Helpers.php#L31
* @param mixed $left
* @param mixed $right
* @return mixed
*/
public function merge($left, $right)
{
if (\is_array($left) && \is_array($right)) {
return $this->mergeLeftToRightWithCallable($left, $right, function ($leftValue, $rightValue) {
return $this->merge($leftValue, $rightValue);
});
}
if ($left !== null) {
return $left;
}
if (!\is_array($right)) {
return $left;
}
return $right;
}
/**
* The same as above, just with the case if both values being non-array, it will combined them to array:
*
* $this->mergeWithCombine(1, 2); // [1, 2]
* @param mixed $left
* @param mixed $right
* @return mixed
*/
public function mergeWithCombine($left, $right)
{
if (\is_array($left) && \is_array($right)) {
return $this->mergeLeftToRightWithCallable($left, $right, function ($leftValue, $rightValue) {
return $this->mergeWithCombine($leftValue, $rightValue);
});
}
if ($left === null && \is_array($right)) {
return $right;
}
if (!empty($right) && (array) $left !== (array) $right) {
return $this->mergeWithCombine((array) $right, (array) $left);
}
return $left;
}
/**
* @param array<int|string, mixed> $left
* @param array<int|string, mixed> $right
* @return mixed[]
*/
private function mergeLeftToRightWithCallable(array $left, array $right, callable $mergeCallback) : array
{
foreach ($left as $key => $val) {
if (\is_int($key)) {
// prevent duplicated values in unindexed arrays
if (!\in_array($val, $right, \true)) {
$right[] = $val;
}
} else {
if (isset($right[$key])) {
$val = $mergeCallback($val, $right[$key]);
}
$right[$key] = $val;
}
}
return $right;
}
}
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