<?php

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namespace Elementor\Modules\AtomicWidgets;

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if ( ! defined( 'ABSPATH' ) ) {

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exit; // Exit if accessed directly.

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}

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const CACHE_KEY_PREFIX = 'elementor_atomic_cache_validity-';

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class Cache_Validity {

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public function is_valid( array $keys ): bool {

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$root = array_shift( $keys );

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$state_item = get_option( CACHE_KEY_PREFIX . $root, null );

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if ( ! empty( $keys ) ) {

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if ( ! $state_item ) {

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return false;

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}

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$state_item = $this->get_nested_item( $state_item, $keys );

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}

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return $state_item ? $state_item['state'] : false;

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}

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public function invalidate( array $keys ): void {

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$root = array_shift( $keys );

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$state_item = get_option( CACHE_KEY_PREFIX . $root, [

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'state' => false,

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'children' => [],

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] );

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$current_item = &$state_item;

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if ( ! empty( $keys ) ) {

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$current_item = &$this->get_nested_item( $current_item, $keys );

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}

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$current_item['state'] = false;

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$this->invalidate_nested_items( $current_item );

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update_option( CACHE_KEY_PREFIX . $root, $state_item );

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}

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public function validate( array $keys ): void {

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$root = array_shift( $keys );

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$state_item = get_option( CACHE_KEY_PREFIX . $root, [

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'state' => false,

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'children' => [],

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] );

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$current_item = &$state_item;

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if ( ! empty( $keys ) ) {

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$current_item = &$this->get_nested_item( $current_item, $keys );

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}

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$current_item['state'] = true;

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update_option( CACHE_KEY_PREFIX . $root, $state_item );

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}

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/**

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* @param array{state: boolean, children: array<string, self>} $root_item

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* @param array<string> $keys

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* @return array{state: boolean, children: array<string, self>}

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*/

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private function &get_nested_item( array &$root_item, array $keys ): array {

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$current_item = &$root_item;

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while ( ! empty( $keys ) ) {

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$key = array_shift( $keys );

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if ( ! isset( $current_item['children'][ $key ] ) ) {

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$current_item['children'][ $key ] = [

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'state' => false,

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'children' => [],

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];

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}

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$current_item = &$current_item['children'][ $key ];

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}

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return $current_item;

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}

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private function invalidate_nested_items( array &$root_item ): void {

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foreach ( $root_item['children'] as &$child_item ) {

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$child_item['state'] = false;

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$this->invalidate_nested_items( $child_item );

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}

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}

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}

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