my-chatbot.php

<?php
/**
 * Plugin Name: My Chatbot
 * Plugin URI: https://github.com/danielpowney/my-chatbot
 * Description: An artificial intelligent chatbot for WordPress powered by Dialogflow.
 * Author: Daniel Powney
 * Author URI: https://danielpowney.com
 * Version: 1.0.1
 * Text Domain: my-chatbot
 * Domain Path: languages
 *
 * My Chatbot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * any later version.
 *
 * My Chatbot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Easy Digital Downloads. If not, see <http://www.gnu.org/licenses/>.
 *
 * @package     MYC
 * @author 		Daniel Powney
 * @version		1.0
 */

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

if ( ! class_exists( 'My_Chatbot' ) ) :


/**
 * Main My_Chatbot Class.
 *
 * @since 1.4
 */
final class My_Chatbot {

	/**
	 * MYC API Object.
	 *
	 * @var object|EDD_API
	 * @since 1.5
	 */
	public $api;

	/** Singleton *************************************************************/

	/**
	 * @var My_Chatbot The one true My_Chatbot
	 * @since 1.4
	 */
	private static $instance;

	/**
	 * Used to identify multiple chatbots on the same page...
	 */
	public static $sequence = 0;


	/**
	 * Main My_Chatbot Instance.
	 *
	 * Insures that only one instance of My_Chatbot exists in memory at any one
	 * time. Also prevents needing to define globals all over the place.
	 *
	 * @since 0.1
	 * @static
	 * @staticvar array $instance
	 * @uses My_Chatbot::setup_constants() Setup the constants needed.
	 * @uses My_Chatbot::includes() Include the required files.
	 * @uses My_Chatbot::load_textdomain() load the language files.
	 * @see MYC()
	 * @return object|My_Chatbot The one true My_Chatbot
	 */
	public static function instance() {

		if ( ! isset( self::$instance ) && ! ( self::$instance instanceof My_Chatbot ) ) {

			self::$instance = new My_Chatbot;
			self::$instance->setup_session();
			self::$instance->setup_constants();

			add_action( 'plugins_loaded', array( self::$instance, 'load_textdomain' ) );
			add_action( 'in_plugin_update_message-my-chatbot/my-chatbot.php', array( self::$instance, 'upgrade_notice' ), 10, 2 );

			self::$instance->includes();
			self::$instance->api = new MYC_API();
		}
		return self::$instance;
	}

	/**
	 * Throw error on object clone.
	 *
	 * The whole idea of the singleton design pattern is that there is a single
	 * object therefore, we don't want the object to be cloned.
	 *
	 * @since 1.6
	 * @access protected
	 * @return void
	 */
	public function __clone() {
		// Cloning instances of the class is forbidden.
		_doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'my-chatbot' ), '1.6' );
	}

	/**
	 * Disable unserializing of the class.
	 *
	 * @since 1.6
	 * @access protected
	 * @return void
	 */
	public function __wakeup() {
		// Unserializing instances of the class is forbidden.
		_doing_it_wrong( __FUNCTION__, __( 'Cheatin&#8217; huh?', 'my-chatbot' ), '1.6' );
	}

	/**
	 * Setup plugin constants.
	 *
	 * @access private
	 * @since 1.4
	 * @return void
	 */
	private function setup_constants() {

		// Plugin version.
		if ( ! defined( 'MYC_VERSION' ) ) {
			define( 'MYC_VERSION', '1.0.1' );
		}

		// Plugin slug.
		if ( ! defined( 'MYC_SLUG' ) ) {
			define( 'MYC_SLUG', 'my-chatbot' );
		}

		// Plugin Folder Path.
		if ( ! defined( 'MYC_PLUGIN_DIR' ) ) {
			define( 'MYC_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
		}

		// Plugin Folder URL.
		if ( ! defined( 'MYC_PLUGIN_URL' ) ) {
			define( 'MYC_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
		}

		// Plugin Root File.
		if ( ! defined( 'MYC_PLUGIN_FILE' ) ) {
			define( 'MYC_PLUGIN_FILE', __FILE__ );
		}
	}

	/**
	 * Include required files.
	 *
	 * @access private
	 * @since 1.4
	 * @return void
	 */
	private function includes() {
		global $myc_options;

		require_once MYC_PLUGIN_DIR . 'includes/admin/settings/register-settings.php';
		$myc_options = myc_get_settings();

		require_once MYC_PLUGIN_DIR . 'includes/actions.php';
		if( file_exists( MYC_PLUGIN_DIR . 'includes/deprecated-functions.php' ) ) {
			require_once MYC_PLUGIN_DIR . 'includes/deprecated-functions.php';
		}
		require_once MYC_PLUGIN_DIR . 'includes/ajax-functions.php';
		require_once MYC_PLUGIN_DIR . 'includes/api/class-myc-api.php';
		require_once MYC_PLUGIN_DIR . 'includes/template-functions.php';
		require_once MYC_PLUGIN_DIR . 'includes/widgets.php';
		require_once MYC_PLUGIN_DIR . 'includes/misc-functions.php';
		require_once MYC_PLUGIN_DIR . 'includes/shortcodes.php';
		require_once MYC_PLUGIN_DIR . 'includes/scripts.php';
		require_once MYC_PLUGIN_DIR . 'includes/post-meta-box.php';

		// TODO
		//require_once MYC_PLUGIN_DIR . 'includes/gutenberg.php';
		require_once MYC_PLUGIN_DIR . 'includes/rest-api.php';

		if ( is_admin() ) {
			require_once MYC_PLUGIN_DIR . 'includes/admin/admin-actions.php';
			require_once MYC_PLUGIN_DIR . 'includes/admin/admin-pages.php';
			require_once MYC_PLUGIN_DIR . 'includes/admin/settings/display-settings.php';
			require_once MYC_PLUGIN_DIR . 'includes/admin/upgrades/upgrade-functions.php';
			require_once MYC_PLUGIN_DIR . 'includes/admin/welcome.php';
		}

		require_once MYC_PLUGIN_DIR . 'includes/install.php';
	}

	/**
	 * Loads the plugin language files.
	 *
	 * @access public
	 * @since 1.4
	 * @return void
	 */
	public function load_textdomain() {
		global $wp_version;

		// Set filter for plugin's languages directory.
		$myc_lang_dir  = dirname( plugin_basename( MYC_PLUGIN_FILE ) ) . '/languages/';
		$myc_lang_dir  = apply_filters( 'myc_languages_directory', $myc_lang_dir );

		// Traditional WordPress plugin locale filter.

		$get_locale = get_locale();

		if ( $wp_version >= 4.7 ) {

			$get_locale = get_user_locale();
		}

		/**
		 * Defines the plugin language locale used in AffiliateWP.
		 *
		 * @var $get_locale The locale to use. Uses get_user_locale()` in WordPress 4.7 or greater,
		 *                  otherwise uses `get_locale()`.
		 */
		$locale        = apply_filters( 'plugin_locale',  $get_locale, 'my-chatbot' );
		$mofile        = sprintf( '%1$s-%2$s.mo', 'my-chatbot', $locale );

		// Look for wp-content/languages/myc/my-chatbot-{lang}_{country}.mo
		$mofile_global1 = WP_LANG_DIR . '/myc/my-chatbot-' . $locale . '.mo';

		// Look for wp-content/languages/myc/myc-{lang}_{country}.mo
		$mofile_global2 = WP_LANG_DIR . '/myc/myc-' . $locale . '.mo';

		// Look in wp-content/languages/plugins/my-chatbot
		$mofile_global3 = WP_LANG_DIR . '/plugins/my-chatbot/' . $mofile;

		if ( file_exists( $mofile_global1 ) ) {

			load_textdomain( 'my-chatbot', $mofile_global1 );

		} elseif ( file_exists( $mofile_global2 ) ) {

			load_textdomain( 'my-chatbot', $mofile_global2 );

		} elseif ( file_exists( $mofile_global3 ) ) {

			load_textdomain( 'my-chatbot', $mofile_global3 );

		} else {

			// Load the default language files.
			load_plugin_textdomain( 'my-chatbot', false, $myc_lang_dir );
		}

	}

	/**
	 * Ensures MYC session cookie exists
	 */
	public function setup_session() {
		if ( ! ( isset( $_COOKIE['myc_session_id'] ) && strlen( $_COOKIE['myc_session_id'] ) > 0 ) ) {
			$session_id = md5( uniqid( 'myc-' ) );
			setcookie( 'myc_session_id', $session_id, time() + ( 86400 * 30 ), '/' ); // 86400 = 1 day
		}
	}

	/**
	 * Displays upgrade notice
	 */
	public function upgrade_notice( $data, $response ) {
	
		if( isset( $data['upgrade_notice'] ) ) {
			printf(
				'<div class="update-message">%s</div>',
				wpautop( $data['upgrade_notice'] )
			);
		}
	}

}

endif; // End if class_exists check.

/**
 * Checks whether function is disabled.
 *
 * @param string  $function Name of the function.
 * @return bool Whether or not function is disabled.
 */
function myc_is_func_disabled( $function ) {
	$disabled = explode( ',',  ini_get( 'disable_functions' ) );

	return in_array( $function, $disabled );
}


/**
 * The main function for that returns My_Chatbot
 *
 * The main function responsible for returning the one true My_Chatbot
 * Instance to functions everywhere.
 *
 * Use this function like you would a global variable, except without needing
 * to declare the global.
 *
 * Example: <?php $myc = MYC(); ?>
 *
 * @since 1.4
* @return object|My_Chatbot The one true My_Chatbot Instance.
 */
function MYC() {
	return My_Chatbot::instance();
}

// Get MYC Running.
MYC();