delivery-date-system.php

<?php
/**
 * Plugin Name: Delivery Date System for WooCommerce
 * Plugin URI: https://github.com/HasteDesign/Delivery-Date-System-for-Woocommerce
 * Description: Offers to your customers the option to select the delivery date and period
 * Version: 1.0.0
 * Author: Haste
 * Author URI: https://www.hastedesign.com.br
 * License: GPLv2
 * Text Domain: delivery-date-system
 * Domain Path: languages/
 * WC requires at least: 3.0.0
 * WC tested up to:      3.5.5
 */

// Prevents direct access
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'Delivery_Date_System' ) ) {
	class Delivery_Date_System {
		/**
		 * Current version number
		 *
		 * @var   string
		 * @since 1.0.0
		 */
		const VERSION = '1.0.0';

		/**
		 * Instance of this class.
		 *
		 * @var object
		 */
		protected static $instance = null;

		/**
		 * Plugin directory path
		 *
		 * @var string
		 */
		private $plugin_dir = null;

		/**
		 * Initialize the plugin.
		 */
		function __construct() {
			$this->plugin_dir = plugin_dir_path( __FILE__ );
			add_action( 'init', array( $this, 'load_textdomain' ) );
			add_action( 'init', array( $this, 'includes' ), 0 );
		}

		/**
		 * Return the plugin instance.
		 */
		public static function init() {
			// If the single instance hasn't been set, set it now.
			if ( null == self::$instance ) {
				self::$instance = new self;
			}
			return self::$instance;
		}

		/**
		 * A final check if Haste Toolkit exists before kicking off our Haste Toolkit loading.
		 * Delivery_Date_System_VERSION is defined at this point.
		 *
		 * @since  1.0.0
		 */
		public function includes() {
			// Load the functions.php
			require_once $this->plugin_dir . '/functions.php';
		}

		/**
		 * Load plugin translation
		 */
		public function load_textdomain() {
			load_plugin_textdomain( 'delivery-date-system', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
		}
	}
}

/**
* Initialize the plugin actions.
*/
add_action( 'plugins_loaded', array( 'Delivery_Date_System', 'init' ) );