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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Composer\Config\Merger; |
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use Yiisoft\Composer\Config\Merger\Modifier\ModifierInterface; |
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use Yiisoft\Composer\Config\Merger\Modifier\ReverseBlockMerge; |
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final class Merger |
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{ |
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/** |
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* Merges two or more arrays into one recursively. |
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* If each array has an element with the same string key value, the latter |
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* will overwrite the former (different from `array_merge_recursive`). |
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* Recursive merging will be conducted if both arrays have an element of array |
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* type and are having the same key. |
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* For integer-keyed elements, the elements from the latter array will |
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* be appended to the former array. |
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* You can use modifiers {@see Merger::applyModifiers()} to change merging result. |
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* |
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* @param array ...$args arrays to be merged |
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* |
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* @return array the merged array (the original arrays are not changed) |
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*/ |
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public static function merge(...$args): array |
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{ |
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$lastArray = end($args); |
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if ( |
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isset($lastArray[ReverseBlockMerge::class]) && |
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$lastArray[ReverseBlockMerge::class] instanceof ReverseBlockMerge |
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) { |
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return self::applyModifiers(self::performReverseBlockMerge(...$args)); |
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} |
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return self::applyModifiers(self::performMerge(...$args)); |
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} |
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private static function performMerge(array ...$args): array |
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{ |
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$res = array_shift($args) ?: []; |
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while (!empty($args)) { |
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/** @psalm-var mixed $v */ |
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foreach (array_shift($args) as $k => $v) { |
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if (is_int($k)) { |
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if (array_key_exists($k, $res) && $res[$k] !== $v) { |
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/** @var mixed */ |
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$res[] = $v; |
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} else { |
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/** @var mixed */ |
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$res[$k] = $v; |
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} |
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} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) { |
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$res[$k] = self::performMerge($res[$k], $v); |
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} else { |
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/** @var mixed */ |
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$res[$k] = $v; |
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} |
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} |
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} |
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return $res; |
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} |
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private static function performReverseBlockMerge(array ...$args): array |
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{ |
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$res = array_pop($args) ?: []; |
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while (!empty($args)) { |
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/** @psalm-var mixed $v */ |
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foreach (array_pop($args) as $k => $v) { |
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if (is_int($k)) { |
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if (array_key_exists($k, $res) && $res[$k] !== $v) { |
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/** @var mixed */ |
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$res[] = $v; |
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} else { |
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/** @var mixed */ |
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$res[$k] = $v; |
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} |
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} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) { |
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$res[$k] = self::performReverseBlockMerge($v, $res[$k]); |
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} elseif (!isset($res[$k])) { |
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/** @var mixed */ |
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$res[$k] = $v; |
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} |
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} |
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} |
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return $res; |
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} |
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/** |
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* Apply modifiers (classes that implement {@link ModifierInterface}) in array. |
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* |
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* For example, {@link \Yiisoft\Composer\Config\Merger\Modifier\UnsetValue} to unset value from previous |
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* array or {@link \Yiisoft\Composer\Config\Merger\Modifier\ReplaceArrayValue} to force replace former |
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* value instead of recursive merging. |
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* |
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* @param array $data |
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* |
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* @return array |
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* |
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* @see ModifierInterface |
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*/ |
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private static function applyModifiers(array $data): array |
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{ |
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$modifiers = []; |
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/** @psalm-var mixed $v */ |
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foreach ($data as $k => $v) { |
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if ($v instanceof ModifierInterface) { |
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$modifiers[$k] = $v; |
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unset($data[$k]); |
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} elseif (is_array($v)) { |
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$data[$k] = self::applyModifiers($v); |
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} |
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} |
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ksort($modifiers); |
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foreach ($modifiers as $key => $modifier) { |
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$data = $modifier->apply($data, $key); |
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} |
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return $data; |
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} |
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} |
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yiisoft /
composer-config-plugin
