<?php

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namespace Elementor\Modules\Components;

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if ( ! defined( 'ABSPATH' ) ) {

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exit; // Exit if accessed directly.

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}

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/**

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* Manages document locking for Elementor documents.

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*

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* This class handles locking/unlocking documents to prevent multiple users

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* from editing the same document simultaneously.

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*/

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class Document_Lock_Manager {

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// 5 minutes

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const DEFAULT_TIME = 60 * 5;

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private $lock_duration;

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private const LOCK_USER_META = '_lock_user';

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private const LOCK_TIME_META = '_lock_time';

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private const LOCK_EDIT_LOCK_META = '_edit_lock';

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/**

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* Initialize the lock manager.

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*

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* @param int $lock_duration Lock duration in seconds (default: 300 = 5 minutes)

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*/

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public function __construct( $lock_duration = self::DEFAULT_TIME ) {

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$this->lock_duration = $lock_duration;

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}

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/**

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* Lock a document for the current user.

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*

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* @param int $document_id The document ID to lock

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* @return bool True if lock was successful, false otherwise

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*/

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public function lock( $document_id ) {

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try {

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$user_id = get_current_user_id();

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if ( ! $user_id ) {

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return false;

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}

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$post = get_post( $document_id );

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if ( ! $post ) {

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return false;

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}

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if ( $this->is_lock_expired( $document_id ) ) {

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$this->unlock( $document_id );

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}

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$existing_lock = $this->get_lock_data( $document_id );

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if ( $existing_lock['locked_by'] ) {

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return false;

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}

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update_post_meta( $document_id, self::LOCK_USER_META, $user_id );

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update_post_meta( $document_id, self::LOCK_TIME_META, time() );

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if ( ! function_exists( 'wp_set_post_lock' ) ) {

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require_once ABSPATH . 'wp-admin/includes/post.php';

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}

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wp_set_post_lock( $document_id );

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return true;

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} catch ( \Exception $e ) {

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error_log( 'Document lock error: ' . $e->getMessage() );

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return false;

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}

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}

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/**

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* Unlock a document.

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*

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* @param int $document_id The document ID to unlock

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* @return bool True if unlock was successful, false otherwise

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*/

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public function unlock( $document_id ) {

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try {

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delete_post_meta( $document_id, self::LOCK_USER_META );

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delete_post_meta( $document_id, self::LOCK_TIME_META );

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delete_post_meta( $document_id, self::LOCK_EDIT_LOCK_META );

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return true;

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} catch ( \Exception $e ) {

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error_log( 'Document unlock error: ' . $e->getMessage() );

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return false;

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}

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}

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/**

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* Check if a document is currently locked.

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*

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* @param int $document_id The document ID to check

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* @return array Lock data with 'locked_by' (int|null), 'locked_at' (int|null)

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*/

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public function get_lock_data( $document_id ) {

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$locked_by = $this->get_document_lock_user( $document_id );

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$locked_at = $this->get_document_lock_time( $document_id );

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return [

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'locked_by' => $locked_by,

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'locked_at' => $locked_at,

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];

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}

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/**

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* Check if a document lock has expired.

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*

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* @param int $document_id The document ID to check

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* @return bool True if lock exists and is expired, false if not locked or not expired

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*/

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public function is_lock_expired( $document_id ) {

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$lock_data = $this->get_lock_data( $document_id );

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if ( ! $lock_data['locked_by'] ) {

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return false;

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}

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return $lock_data['locked_at'] && (int) $lock_data['locked_at'] + $this->lock_duration <= time();

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}

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/**

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* Extend the lock for a document.

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*

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* @param int $document_id The document ID

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* @return bool True if extended successfully, false if not locked or locked by another user

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*/

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public function extend_lock( $document_id ) {

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$lock_data = $this->get_lock_data( $document_id );

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if ( ! $lock_data['locked_by'] ) {

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return false;

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}

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$current_user_id = get_current_user_id();

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if ( (int) $lock_data['locked_by'] !== (int) $current_user_id ) {

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return false;

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}

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update_post_meta( $document_id, self::LOCK_TIME_META, time() );

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return true;

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}

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public function get_document_lock_user( $document_id ) {

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$lock_user_meta = get_post_meta( $document_id, self::LOCK_USER_META, true );

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if ( $lock_user_meta ) {

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return (int) $lock_user_meta;

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}

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if ( ! function_exists( 'wp_check_post_lock' ) ) {

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require_once ABSPATH . 'wp-admin/includes/post.php';

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}

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$wp_lock_user = wp_check_post_lock( $document_id );

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return $wp_lock_user ? (int) $wp_lock_user : null;

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}

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/**

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* Get the lock time of a document.

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*

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* @param int $document_id The document ID to check

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* @return int|null Lock time, or null if not locked

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*/

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public function get_document_lock_time( $document_id ) {

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$lock_time = get_post_meta( $document_id, self::LOCK_TIME_META, true );

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if ( $lock_time ) {

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return (int) $lock_time;

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}

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return null;

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}

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}

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