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116 lines
3.8 KiB
116 lines
3.8 KiB
<?php
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/**
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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
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* @link https://cakephp.org CakePHP(tm) Project
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* @since 3.0.0
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* @license https://opensource.org/licenses/mit-license.php MIT License
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*/
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namespace Cake\Utility;
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/**
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* Provides features for merging object properties recursively with
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* parent classes.
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*/
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trait MergeVariablesTrait
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{
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/**
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* Merge the list of $properties with all parent classes of the current class.
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*
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* ### Options:
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*
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* - `associative` - A list of properties that should be treated as associative arrays.
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* Properties in this list will be passed through Hash::normalize() before merging.
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*
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* @param string[] $properties An array of properties and the merge strategy for them.
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* @param array $options The options to use when merging properties.
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* @return void
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*/
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protected function _mergeVars($properties, $options = [])
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{
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$class = get_class($this);
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$parents = [];
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while (true) {
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$parent = get_parent_class($class);
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if (!$parent) {
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break;
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}
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$parents[] = $parent;
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$class = $parent;
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}
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foreach ($properties as $property) {
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if (!property_exists($this, $property)) {
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continue;
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}
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$thisValue = $this->{$property};
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if ($thisValue === null || $thisValue === false) {
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continue;
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}
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$this->_mergeProperty($property, $parents, $options);
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}
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}
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/**
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* Merge a single property with the values declared in all parent classes.
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*
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* @param string $property The name of the property being merged.
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* @param array $parentClasses An array of classes you want to merge with.
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* @param array $options Options for merging the property, see _mergeVars()
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* @return void
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*/
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protected function _mergeProperty($property, $parentClasses, $options)
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{
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$thisValue = $this->{$property};
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$isAssoc = false;
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if (
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isset($options['associative']) &&
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in_array($property, (array)$options['associative'])
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) {
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$isAssoc = true;
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}
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if ($isAssoc) {
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$thisValue = Hash::normalize($thisValue);
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}
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foreach ($parentClasses as $class) {
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$parentProperties = get_class_vars($class);
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if (empty($parentProperties[$property])) {
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continue;
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}
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$parentProperty = $parentProperties[$property];
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if (!is_array($parentProperty)) {
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continue;
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}
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$thisValue = $this->_mergePropertyData($thisValue, $parentProperty, $isAssoc);
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}
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$this->{$property} = $thisValue;
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}
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/**
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* Merge each of the keys in a property together.
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*
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* @param array $current The current merged value.
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* @param array $parent The parent class' value.
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* @param bool $isAssoc Whether or not the merging should be done in associative mode.
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* @return mixed The updated value.
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*/
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protected function _mergePropertyData($current, $parent, $isAssoc)
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{
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if (!$isAssoc) {
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return array_merge($parent, $current);
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}
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$parent = Hash::normalize($parent);
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foreach ($parent as $key => $value) {
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if (!isset($current[$key])) {
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$current[$key] = $value;
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}
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}
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return $current;
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}
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}
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