<?php

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/**

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* The file that enable builder revisions.

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*

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* Themify_Builder_Revisions class provide hooks and filter to WP Revisions API

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* This enable builder being tracked by WP Revisions and able to restore

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* the revision for builder.

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*

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*

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* @package Themify_Builder

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* @subpackage Themify_Builder/classes

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*/

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/**

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* The Builder Revision class.

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*

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* This is used to handle all revisions operation and method.

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*

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*

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* @package Themify_Builder

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* @subpackage Themify_Builder/classes

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* @author Themify

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*/

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final class Themify_Builder_Revisions {

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private const REVISION_LIMIT = 50;

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/**

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* Constructor.

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*

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* @param object Themify_Builder $builder

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*/

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public static function init() {

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$ajax_events = array(

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'load_revision_lists',

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'save_revision',

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'restore_revision_page',

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'delete_revision'

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);

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foreach ($ajax_events as $ajax_event) {

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add_action('wp_ajax_tb_' . $ajax_event, array(__CLASS__, $ajax_event));

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}

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add_filter('_wp_post_revision_fields', array(__CLASS__, 'post_revision_fields'), 10, 2);

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add_action('wp_restore_post_revision', array(__CLASS__, 'restore_revision'), 10, 2);

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}

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/**

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* Ajax Get all post revisions list.

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*

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* @access public

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*/

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public static function load_revision_lists() {

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check_ajax_referer('tf_nonce', 'nonce');

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if (!empty( $_POST['bid'] ) && current_user_can( 'read_post', $_POST['bid'] ) ) {

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$post_id = (int) $_POST['bid'];

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$revisions = wp_get_post_revisions($post_id, array(

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'posts_per_page' => self::REVISION_LIMIT,

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));

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$can_edit_post = $post_id === 0 ? true : current_user_can('edit_post', $post_id);

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include THEMIFY_BUILDER_INCLUDES_DIR . '/tpl/tmpl-revisions.php';

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}

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wp_die();

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}

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/**

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* Hook themify builder field to revisions fields.

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*

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* @access public

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* @param array $fields

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* @return array

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*/

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public static function post_revision_fields(array $fields, $post):array {

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if (function_exists('wp_print_revision_templates')) {

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$fields[ThemifyBuilder_Data_Manager::META_KEY] = esc_html__('Themify Builder', 'themify');

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add_filter('_wp_post_revision_field__themify_builder_settings_json', array(__CLASS__, 'post_revision_field'), 10, 4);

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}

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return $fields;

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}

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/**

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* Render the builder output in revision compare slider.

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*

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* @access public

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* @param string $value

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* @param string $field

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* @return string

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*/

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public static function post_revision_field($value, $field, $revision, $type) {

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if (is_object($revision)) {

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$builder_data = ThemifyBuilder_Data_Manager::get_data($revision->ID);

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if (!empty($builder_data)) {

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return Themify_Builder_Component_Module::retrieve_template('builder-output.php', array('builder_output' => $builder_data, 'builder_id' => $revision->ID), THEMIFY_BUILDER_TEMPLATES_DIR, '', false);

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}

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}

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}

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/**

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* Ajax save revision.

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*

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* @access public

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*/

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public static function save_revision() {

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check_ajax_referer('tf_nonce', 'nonce');

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/* set a default limit for revisions */

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if (!defined('WP_POST_REVISIONS')) {

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define('WP_POST_REVISIONS', self::REVISION_LIMIT);

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}

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if (isset($_POST['data'])) {

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$data = stripslashes_deep($_POST['data']);

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} elseif (isset($_FILES['data'])) {

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$data = file_get_contents($_FILES['data']['tmp_name']);

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}

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if (!empty($data)) {

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$data = json_decode($data, true);

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if (!empty($data)) {

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$post_id = (int) $_POST['bid'];

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$post = get_post($post_id);

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$rev_comment = !empty($_POST['rev_comment']) ? sanitize_text_field($_POST['rev_comment']) : '';

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if (!current_user_can('edit_post', $post_id)){

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wp_send_json_error(esc_html__('Error. You do not have access to save revision.', 'themify'));

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}

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if (!self::is_revision_enabled($post)){

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wp_send_json_error(esc_html__('Error. The revision is not enable in this post or has been reach the revision post limit.', 'themify'));

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}

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if (is_object($post)) {

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$post = get_object_vars($post);

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}

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unset($post['post_modified'], $post['post_modified_gmt']);

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$new_revision_id = _wp_put_post_revision($post);

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$results = array();

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if (!is_wp_error($new_revision_id)) {

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if (!empty($rev_comment)) {

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update_metadata('post', $new_revision_id, '_builder_custom_rev_comment', $rev_comment);

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}

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$custom_css = isset($_POST['custom_css']) ? $_POST['custom_css'] : null;

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$results = ThemifyBuilder_Data_Manager::save_data($data, $new_revision_id, $_POST['sourceEditor'], $custom_css);

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}

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if (!empty($results['mid'])) {

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wp_send_json_success($new_revision_id);

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}

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if (!is_wp_error($new_revision_id)) {

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wp_delete_post_revision($new_revision_id);

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}

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wp_send_json_error(esc_html__('Cannot save revision, please try again.', 'themify'));

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}

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wp_send_json_success();

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}

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wp_send_json_error(esc_html__('Cannot save revision, please try again.', 'themify'));

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}

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/**

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* Hook to restore revision.

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*

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* @access public

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* @param int $post_id

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* @param int $rev_id

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*/

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public static function restore_revision($post_id, $rev_id) {

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$builder_data = ThemifyBuilder_Data_Manager::get_data($rev_id);

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if (!empty($builder_data)) {

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ThemifyBuilder_Data_Manager::save_data($builder_data, $post_id);

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}

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}

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/**

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* Ajax restore revision.

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*

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* @access public

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*/

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public static function restore_revision_page() {

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check_ajax_referer('tf_nonce', 'nonce');

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$rev_id = (int) $_POST['revid'];

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$revision = wp_get_post_revision($rev_id);

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if (!current_user_can('edit_post', $revision->post_parent)) {

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wp_send_json_error(esc_html__('Error. You do not have access to restore revision.', 'themify'));

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}

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if ($revision) {

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wp_send_json(array('builder_data' => ThemifyBuilder_Data_Manager::get_data($rev_id), 'custom_css' => get_post_meta($rev_id, 'tbp_custom_css', true)));

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}

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wp_send_json_error(esc_html__('Revision post is not found or invalid ID', 'themify'));

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}

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/**

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* Ajax delete revision.

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*

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* @access public

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* @return json

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*/

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public static function delete_revision() {

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check_ajax_referer('tf_nonce', 'nonce');

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$rev_id = (int) $_POST['revid'];

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$revision = wp_get_post_revision($rev_id);

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if (!current_user_can('edit_post', $revision->post_parent)) {

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wp_send_json_error(esc_html__('Error. You do not have access to delete revision.', 'themify'));

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}

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$delete = wp_delete_post_revision($rev_id);

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if (!is_wp_error($delete)) {

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wp_send_json_success($rev_id);

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}

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wp_send_json_error(esc_html__('Unable to delete this revision, please try again!', 'themify'));

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}

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/**

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* create builder revision

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*

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* @access public

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* @param int $post_id

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* @param object $post

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*/

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public static function create_revision($post_id, $builder_data, $action) {

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if (!wp_is_post_revision($post_id)) {

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$post = get_post($post_id);

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if (!empty($post) && 'auto-draft' !== $post->post_status && wp_revisions_enabled($post) && post_type_supports($post->post_type, 'revisions')) {

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unset($post->post_modified, $post->post_modified_gmt);

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$rev_id = _wp_put_post_revision($post);

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if (!is_wp_error($rev_id)) {

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if (empty($builder_data)) {

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$builder_data = array();

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}

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ThemifyBuilder_Data_Manager::save_data($builder_data, $rev_id, $action);

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return $rev_id;

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}

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}

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}

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return false;

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}

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/**

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* Check if revision has builder data.

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*

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* @access public

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* @param int $post_id

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* @return boolean

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*/

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public static function check_has_builder($post_id):bool {

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$builder_data = get_metadata('post', $post_id, ThemifyBuilder_Data_Manager::META_KEY, true);

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return !empty($builder_data);

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}

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public static function is_revision_enabled($post):bool {

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$p = get_post($post);

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return wp_revisions_enabled($p) && post_type_supports($p->post_type, 'revisions');

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}

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}

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