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<?php
/**
 * Singleton
 *
 * @package   WP Grid Builder
 * @author    Loïc Blascos
 * @copyright 2019-2023 Loïc Blascos
 */

namespace WP_Grid_Builder\Includes;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Singleton trait
 *
 * @class WP_Grid_Builder\Includes\Singleton
 * @since 1.0.0
 */
trait Singleton {

	/**
	 * Class Object
	 *
	 * @since 1.0.0
	 * @var object
	 */
	protected static $instance = null;


	/**
	 * Singleton instance
	 *
	 * @since 1.0.0
	 * @access public
	 */
	final public static function get_instance() {

		if ( is_null( static::$instance ) ) {
			static::$instance = new static();
		}

		return static::$instance;

	}

	/**
	 * Private constructor
	 *
	 * @since 1.0.0
	 * @access private
	 */
	final private function __construct() {

		$this->init();

	}

	/**
	 * Default init method
	 * This method can be overridden if needed.
	 *
	 * @since 1.0.0
	 * @access protected
	 */
	protected function init() {}

	/**
	 * Prevent clonning of the singleton object
	 *
	 * @since 1.0.0
	 * @access private
	 */
	private function __clone() {}

	/**
	 * Prevent de-serializing of the Singleton object
	 *
	 * @since 1.0.0
	 * @access private
	 */
	public function __wakeup() {}
}