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<?php
// Prevent direct file access
defined( 'LS_ROOT_FILE' ) || exit;
/**
* LayerSlider Slider Revisions Class
*
* Utility class to manage slider revisions and revert sliders back to earlier states.
*
* @since 6.3.0
* @author John Gera
* @copyright Copyright (c) 2020 John Gera, George Krupa, and Kreatura Media Kft.
*/
class LS_Revisions {
public static $active = false;
public static $enabled = true;
public static $limit = 100;
public static $interval = 10;
/**
* Private constructor to prevent instantiate static class
*
* @since 6.3.0
* @access private
* @return void
*/
private function __construct() {
}
public static function init() {
if( LS_Config::isActivatedSite() && get_option('ls-revisions-enabled', true) ) {
self::$active = true;
}
$option = get_option('ls-revisions-enabled', true);
self::$enabled = ! empty( $option );
self::$limit = get_option('ls-revisions-limit', 100);
self::$interval = get_option('ls-revisions-interval', 10);
}
/**
* Counts the number of revisions saved for the specified slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @return int The number of revisions available for the slider
*/
public static function count( $sliderId ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ) {
return false;
}
$result = $wpdb->get_col( $wpdb->prepare("
SELECT COUNT(*) FROM {$wpdb->prefix}layerslider_revisions
WHERE slider_id = %d
LIMIT 1
", $sliderId));
return (int) $result[0];
}
/**
* Finds and returns revisions for a specified slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @return array Array of found slider revisions, or false on error
*/
public static function snapshots( $sliderId ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ) {
return false;
}
return $wpdb->get_results( $wpdb->prepare("
SELECT * FROM {$wpdb->prefix}layerslider_revisions
WHERE slider_id = %d
ORDER BY id ASC
LIMIT 500
", $sliderId));
}
/**
* Retrieve a specific revision by its database ID
*
* @since 6.3.0
* @access public
* @param int $revisionId The revision database ID
* @return object The chosen revision data, or false on error
*/
public static function get( $revisionId ) {
global $wpdb;
$revisionId = (int)$revisionId;
if( empty( $revisionId ) || ! is_numeric($revisionId) ) {
return false;
}
return $wpdb->get_row( $wpdb->prepare("
SELECT * FROM {$wpdb->prefix}layerslider_revisions
WHERE id = %d
ORDER BY id ASC
LIMIT 1
", $revisionId));
}
/**
* Retrieve the last revision for a particular slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @return object The last revision, or false on error
*/
public static function last( $sliderId ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ) {
return false;
}
return $wpdb->get_row( $wpdb->prepare("
SELECT * FROM {$wpdb->prefix}layerslider_revisions
WHERE slider_id = %d
ORDER BY id DESC
LIMIT 1
", $sliderId));
}
/**
* Adds a new revision for a specified slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @param string $sliderData The serialized data of the slider
* @return array Array of found slider revisions, or false on error
*/
public static function add( $sliderId, $sliderData ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) || empty( $sliderData ) ) {
return false;
}
$wpdb->insert( $wpdb->prefix.'layerslider_revisions',
array(
'slider_id' => $sliderId,
'author' => get_current_user_id(),
'data' => $sliderData,
'date_c' => time()
),
array(
'%d',
'%d',
'%s',
'%d'
)
);
return $wpdb->insert_id;
}
/**
* Removes a revision
*
* @since 6.3.0
* @access public
* @param int $revisionId The revision database ID
* @return mixed Returns the number of rows affected, or false on error
*/
public static function remove( $revisionId ) {
global $wpdb;
$revisionId = (int)$revisionId;
if( empty( $revisionId ) || ! is_numeric($revisionId) ) {
return false;
}
return $wpdb->delete( $wpdb->prefix.'layerslider_revisions',
array( 'id' => $revisionId ),
array( '%d' )
);
}
/**
* Removes the last revision of the specified slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The revision database ID
* @return mixed Returns the number of rows affected, or false on error
*/
public static function shift( $sliderId ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ) {
return false;
}
return $wpdb->query( $wpdb->prepare("
DELETE FROM {$wpdb->prefix}layerslider_revisions
WHERE slider_id = %d
ORDER BY id ASC
LIMIT 1
", $sliderId ) );
}
/**
* Removes all revisions for a chosen slider
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @return mixed Returns the number of rows affected, or false on error
*/
public static function clear( $sliderId ) {
global $wpdb;
$sliderId = (int)$sliderId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ) {
return false;
}
return $wpdb->delete( $wpdb->prefix.'layerslider_revisions',
array( 'slider_id' => $sliderId ),
array( '%d' )
);
}
/**
* Truncates the entire database table.
*
* @since 6.3.0
* @access public
* @return mixed Returns the number of rows affected, or false on error
*/
public static function truncate( ) {
global $wpdb;
return $wpdb->query("TRUNCATE {$wpdb->prefix}layerslider_revisions;");
}
/**
* Reverts the specified slider to a chosen revision
*
* @since 6.3.0
* @access public
* @param int $sliderId The slider database ID
* @param int $revisionId The revision database ID
* @return bool True on success, false on error
*/
public static function revert( $sliderId, $revisionId ) {
global $wpdb;
$sliderId = (int)$sliderId;
$revisionId = (int)$revisionId;
if( empty( $sliderId ) || ! is_numeric($sliderId) ||
empty( $revisionId )|| ! is_numeric($revisionId) ) {
return false;
}
$slider = LS_Sliders::find( $sliderId );
$revision = self::get( $revisionId );
$data = $revision->data;
if( $revision && $data ) {
self::add( $sliderId, $data );
LS_Sliders::update( $sliderId, $slider['name'], json_decode($data, true), $slider['slug']);
}
return true;
}
}