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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Arrays\Collection\Modifier; |
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use Yiisoft\Arrays\Collection\Modifier\ModifierInterface\AfterMergeModifierInterface; |
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use Yiisoft\Arrays\Collection\Modifier\ModifierInterface\BeforeMergeModifierInterface; |
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use function array_slice; |
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/** |
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* The modifier allows to mark an array element from the collection it is applied to, |
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* as the element to be processed in a special way on merge. |
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* |
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* - In case there are elements with the same keys in previous arrays, they will be replaced |
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* with a value from the current array. |
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* |
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* - If there are elements with the same keys in next arrays, they will replace current array value. |
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* |
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* If there is no element with the given key in the array, modifier won't change anything. |
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* |
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* Note that this modifier is applied on merge. |
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* |
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* Usage example: |
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* |
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* ```php |
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* $a = [ |
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* 'name' => 'Yii', |
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* 'version' => '1.1', |
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* 'features' => ['mvc'], |
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* ]; |
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* $b = new ArrayCollection( |
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* [ |
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* 'version' => '3.0', |
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* 'features' => ['gii'], |
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* ], |
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* new ReplaceValue('features') |
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* ); |
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* |
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* // [ |
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* // 'name' => 'Yii', |
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* // 'version' => '3.0', |
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* // 'features' => ['gii'], |
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* // ], |
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* $result = ArrayHelper::merge($a, $b)); |
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* ``` |
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*/ |
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final class ReplaceValue extends Modifier implements BeforeMergeModifierInterface, AfterMergeModifierInterface |
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{ |
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/** |
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* @var int|string |
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*/ |
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private $key; |
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/** |
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* @var mixed |
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*/ |
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private $value; |
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private bool $setValueAfterMerge = false; |
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/** |
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* @param int|string $key |
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*/ |
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public function __construct($key) |
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{ |
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$this->key = $key; |
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} |
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/** |
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* @param int|string $key |
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* |
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* @return self |
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*/ |
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public function withKey($key): self |
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{ |
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$new = clone $this; |
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$new->key = $key; |
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return $new; |
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} |
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public function beforeMerge(array $arrays, int $index): array |
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{ |
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$currentArray = $arrays[$index]; |
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if (!array_key_exists($this->key, $currentArray)) { |
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2 |
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return $arrays[$index]; |
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} |
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foreach (array_slice($arrays, $index + 1) as $array) { |
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if (array_key_exists($this->key, $array)) { |
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$currentArray[$this->key] = null; |
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return $currentArray; |
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} |
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} |
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foreach (array_slice($arrays, 0, $index) as $array) { |
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if (array_key_exists($this->key, $array)) { |
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$this->value = $currentArray[$this->key]; |
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$this->setValueAfterMerge = true; |
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return $currentArray; |
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} |
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} |
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return $currentArray; |
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} |
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public function afterMerge(array $data): array |
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{ |
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if ($this->setValueAfterMerge) { |
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$data[$this->key] = $this->value; |
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$this->setValueAfterMerge = false; |
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} |
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return $data; |
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} |
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} |
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yiisoft /
arrays
