<?php

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namespace Elementor\Modules\GlobalClasses\Usage;

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/**

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* Tracks usage of a specific global CSS class across multiple Elementor documents.

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*/

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class Css_Class_Usage {

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/** @var string */

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private string $class_id;

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/** @var int */

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private int $total = 0;

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/**

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* @var array<int, array{

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* title: string,

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* total: int,

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* elements: string[],

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* type?: string

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* }>

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*/

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private array $pages = [];

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/**

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* Constructor.

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*

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* @param string $class_id Global CSS class ID.

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*/

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public function __construct( string $class_id ) {

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$this->class_id = $class_id;

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}

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/**

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* Track usage of this class on a specific document and element.

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*

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* @param int $page_id Document ID.

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* @param string $page_title Document title.

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* @param string $element_id Element ID using this class.

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* @param string|null $document_type Optional document type (e.g. header, footer, etc).

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*/

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public function track_usage( int $page_id, string $page_title, string $element_id, ?string $document_type = null ): void {

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++$this->total;

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if ( ! isset( $this->pages[ $page_id ] ) ) {

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$this->pages[ $page_id ] = [

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'title' => $page_title,

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'total' => 0,

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'elements' => [],

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];

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if ( $document_type ) {

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$this->pages[ $page_id ]['type'] = $document_type;

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}

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}

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++$this->pages[ $page_id ]['total'];

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$this->pages[ $page_id ]['elements'][] = $element_id;

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}

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/**

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* Merge usage data from another instance with the same class ID.

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*

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* @param Css_Class_Usage $other The other usage object to merge in.

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*

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* @throws \InvalidArgumentException If the class IDs do not match.

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*/

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public function merge( Css_Class_Usage $other ): void {

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if ( $other->get_class_id() !== $this->class_id ) {

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throw new \InvalidArgumentException( 'Mismatched class ID' );

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}

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$this->total += $other->get_total_usage();

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foreach ( $other->get_pages() as $page_id => $data ) {

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if ( ! isset( $this->pages[ $page_id ] ) ) {

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$this->pages[ $page_id ] = $data;

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} else {

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$this->pages[ $page_id ]['total'] += $data['total'];

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$this->pages[ $page_id ]['elements'] = array_merge(

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$this->pages[ $page_id ]['elements'],

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$data['elements']

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);

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if ( empty( $this->pages[ $page_id ]['type'] ) && ! empty( $data['type'] ) ) {

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$this->pages[ $page_id ]['type'] = $data['type'];

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}

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}

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}

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}

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/**

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* Get the global class ID this instance tracks.

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*

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* @return string

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*/

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public function get_class_id(): string {

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return $this->class_id;

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}

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/**

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* Get the total number of elements using this class.

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*

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* @return int

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*/

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public function get_total_usage(): int {

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return $this->total;

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}

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/**

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* Get a map of document usages.

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*

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* @return array<int, array{title: string, total: int, elements: string[], type?: string}>

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*/

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public function get_pages(): array {

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return $this->pages;

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}

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}

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