51 lines
1.4 KiB
PHP
51 lines
1.4 KiB
PHP
<?php
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namespace Icinga\Module\Director\Db\Branch;
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class PlainObjectPropertyDiff
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{
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public static function calculate(array $old = null, array $new = null)
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{
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if ($new === null) {
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throw new \RuntimeException('Cannot diff for delete');
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}
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if ($old === null) {
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foreach (BranchSettings::ENCODED_DICTIONARIES as $property) {
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self::flattenProperty($new, $property);
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}
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return $new;
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}
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$unchangedKeys = [];
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foreach (BranchSettings::ENCODED_DICTIONARIES as $property) {
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self::flattenProperty($old, $property);
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self::flattenProperty($new, $property);
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}
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foreach ($old as $key => $value) {
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if (array_key_exists($key, $new)) {
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if ($value === $new[$key]) {
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$unchangedKeys[] = $key;
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}
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} else {
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$new[$key] = null;
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}
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}
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foreach ($unchangedKeys as $key) {
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unset($new[$key]);
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}
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return $new;
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}
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protected static function flattenProperty(array &$properties, $property)
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{
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// TODO: dots in varnames -> throw or escape?
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if (isset($properties[$property])) {
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foreach ((array) $properties[$property] as $key => $value) {
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$properties["$property.$key"] = $value;
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}
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unset($properties[$property]);
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}
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}
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}
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