tutorial.php

<?php
/**
 * Plugin Name: Turotial
 * Plugin URI: https://github.com/tutorial
 * Description: Getting started with Gutenberg block development.
 * Author: weDevs
 * Version: 1.0.0
 * Text Domain: tutorial
 * Domain Path: /languages
 * License: GPL2
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 */

if ( ! class_exists( 'Tutorial' ) ) :
	/**
	 * Main Tutorial Class.
	 *
	 * @since 1.0.0
	 */
	final class Tutorial {
		/**
		 * This plugin's instance.
		 *
		 * @var Tutorial
		 * @since 1.0.0
		 */
		private static $instance;

		/**
		 * Main Tutorial Instance.
		 *
		 * Insures that only one instance of Tutorial exists in memory at any one
		 * time. Also prevents needing to define globals all over the place.
		 *
		 * @since 1.0.0
		 * @static
		 * @return object|Tutorial The one true Tutorial
		 */
		public static function instance() {
			if ( ! isset( self::$instance ) && ! ( self::$instance instanceof Tutorial ) ) {
				self::$instance = new Tutorial();
				self::$instance->define_constants();
				self::$instance->includes();
				self::$instance->dependency_class_instance();
			}
			return self::$instance;
		}

		/**
	     * Define woogool Constants
	     *
	     * @return type
	     */
	    private function define_constants() {
	        $this->define( 'TUTORIAL_PATH', dirname( __FILE__ ) );
	        $this->define( 'TUTORIAL_INCLUDES_PATH', dirname( __FILE__ ) . '/includes' );
	        $this->define( 'TUTORIAL_DIST_PATH', dirname( __FILE__ ) . '/dist' );
	        $this->define( 'TUTORIAL_DIST_URL',plugin_dir_url( __FILE__ ) . 'dist' );
	        //$this->define( 'TUTORIAL_ASSET', plugin_dir_url( __FILE__ ) . 'assets' );
	    }

	    /**
	     * Define constant if not already set
	     *
	     * @param  string $name
	     * @param  string|bool $value
	     * @return type
	     */
	    private function define( $name, $value ) {
	        if ( ! defined( $name ) ) {
	            define( $name, $value );
	        }
	    }

		/**
		 * Load actions
		 *
		 * @return void
		 */
		private function includes() {
			include( TUTORIAL_PATH . '/vendor/autoload.php' );
		}

		/**
		 * Load actions
		 *
		 * @return void
		 */
		private function dependency_class_instance() {
			\Tutorial\Includes\Actions::instance();
			\Tutorial\Includes\Scripts::instance();
		}

	}
endif;

/**
 * The main function for that returns Tutorial
 *
 */
function tutorial() {
	return Tutorial::instance();
}

// Get the plugin running. Load on plugins_loaded action to avoid issue on multisite.
if ( function_exists( 'is_multisite' ) && is_multisite() ) {
	add_action( 'plugins_loaded', 'tutorial', 90 );
} else {
	tutorial();
}