devllo-events.php

<?php
/*
    Plugin Name: Events by Devllo
    Plugin URI: https://devlloplugins.com/
    Description: This is a simple Event Manager plugin for adding and listing your events, show event locations on map, link to online Event locations. It also integrates with FullCalendar to show a calendar with all events.
    Author: Devllo
    Version: 0.1
    Author URI: https://devllo.com/
    Text Domain: devllo-events
    Domain Path: /languages
 */

// Exit if accessed directly

if ( ! defined( 'ABSPATH' ) ) {
	exit();
}

/**
 * Current plugin version.
 */
define( 'DEVLLO_EVENTS_VERSION', '0.1' );

/**
 * Devllo_Events class
 */

if ( ! class_exists( 'Devllo_Events' ) ) {

    class Devllo_Events {

    /**
	 * The single instance of the class.
	 *
	 * @var self
	 * @since  2.5
	 */
    private static $_instance = null;
    public $_session = null;


    /**
     * Devllo_Events Constructor
     */
    public function __construct(){
        register_activation_hook( __FILE__, array( 'Devllo_Events_Activator', 'devllo_events_activate' ));
        register_deactivation_hook( __FILE__, array( 'Devllo_Events_Activator', 'devllo_events_deactivate' ));
        
        $this->define_constants();
		$this->includes();
        $this->init_hooks();

        add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_scripts' ) );
        add_action( 'wp_enqueue_scripts', array( $this, 'devllo_events_enqueue_scripts' ) );
        add_filter( 'script_loader_tag', array( $this, 'mind_defer_scripts' ), 10, 3 );

    }

    /**
     * Define Constants
     */
    public function define_constants(){
        $this->set_define( 'DEVLLO_EVENTS_PATH', plugin_dir_path( __FILE__ ) );
        $this->set_define( 'DEVLLO_EVENTS_URI', plugin_dir_url( __FILE__ ) );
        $this->set_define( 'DEVLLO_EVENTS_VERSION', '0.0.1' );
        $this->set_define( 'DEVLLO_EVENTS_ADMIN_URI', DEVLLO_EVENTS_URI . 'admin/' );
        $this->set_define( 'DEVLLO_EVENTS_INC', DEVLLO_EVENTS_PATH . 'includes/' );
        $this->set_define( 'DEVLLO_EVENTS_INC_URI', DEVLLO_EVENTS_URI . 'includes/' );
        $this->set_define( 'DEVLLO_EVENTS_ASSETS_URI', DEVLLO_EVENTS_URI . 'assets/' );
        $this->set_define( 'DEVLLO_EVENTS_TEMPLATES', DEVLLO_EVENTS_PATH . 'templates/' );     
    }

   
    // Enqueue scripts and styles
    
    function devllo_events_enqueue_scripts() {   
        wp_enqueue_style( 'devllo-events-frontend', DEVLLO_EVENTS_INC_URI. 'assets/css/style.css');	
    }
    
    // Defer Scripts
    function mind_defer_scripts( $tag, $handle, $src ) {
        $defer = array( 
 
          'map_api_script','map_auto_complete_script', 'map_api_script2', 'auto_complete'
        );
        if ( in_array( $handle, $defer ) ) {
           return '<script src="' . $src . '" defer="defer" type="text/javascript"></script>' . "\n";
        }     
          return $tag;
      } 

    public function admin_enqueue_scripts() {

    wp_enqueue_style( 'devllo-events-admin-css', DEVLLO_EVENTS_ADMIN_URI. 'assets/style.css');	
    global $pagenow;

    if ((( $pagenow == 'post-new.php' ) || ( $pagenow == 'post.php' )) && (get_post_type() == 'devllo_event')) {

    wp_enqueue_script( 'auto_complete', DEVLLO_EVENTS_INC_URI. 'assets/js/auto-complete.js', array(), false, true );

    wp_enqueue_script( 'map_api_script2', 'https://maps.googleapis.com/maps/api/js?key='. get_option('devllo-map-api-key') .'&libraries=places&callback=initAutocomplete', array(), false, true );
    }

    }

    // set_define
    public function set_define( $name = '', $value = '' ) {
        if ( $name && ! defined( $name ) ) {
            define( $name, $value );
        }
    }

    // _include
    public function _include( $file = null ) {
        if ( is_array( $file ) ) {
            foreach ( $file as $key => $f ) {
                if ( file_exists( DEVLLO_EVENTS_PATH . $f ) ) {
                    require_once DEVLLO_EVENTS_PATH . $f;
                }
            }
        } else {
            if ( file_exists( DEVLLO_EVENTS_PATH . $file ) ) {
                require_once DEVLLO_EVENTS_PATH . $file;
            } elseif ( file_exists( $file ) ) {
                require_once $file;
            }
        }
    }

    // Load Text Domain
    public function text_domain() {
        // Get mo file
        $text_domain = 'devllo-events';
        $locale      = apply_filters( 'plugin_locale', get_locale(), $text_domain );
        $mo_file     = $text_domain . '-' . $locale . '.mo';
        // Check mo file global
        $mo_global = WP_LANG_DIR . '/plugins/' . $mo_file;
        // Load translate file
        if ( file_exists( $mo_global ) ) {
            load_textdomain( $text_domain, $mo_global );
        } else {
            load_textdomain( $text_domain, DEVLLO_EVENTS_PATH . '/languages/' . $mo_file );
        }
    }
    

    /**
     * Includes
     */
    public function includes(){
        $this->_include( 'includes/class-devllo-events-post-types.php' );
        $this->_include( 'includes/class-devllo-events-session.php' );
        $this->_include( 'includes/devllo-events-functions.php' );   
        $this->_include( 'includes/class-devllo-events-activator.php');   
        $this->_include( 'admin/class-devllo-events-admin-menu.php');
        $this->_include( 'admin/class-devllo-events-posts-admin.php');
        $this->_include( 'admin/class-devllo-events-admin-settings.php');
        $this->_include( 'templates/calendar-event.php');
        $this->_include( 'templates/template-events.php');

    }

    /**
     * Init Hooks
     */
    public function init_hooks(){
        add_action( 'plugins_loaded', array( $this, 'loaded' ) );
    }

    /**
	* Load components when plugin loaded
	*/
		public function loaded() {
			// load text domain
			$this->text_domain();
			$this->_session = new Devllo_Events_Session();

			do_action( 'devllo_events_init', $this );
		}
    
    /**
		 * get instance class
		 * @return devllo_events
		 */
		public static function instance() {
			if ( ! empty( self::$_instance ) ) {
				return self::$_instance;
			}

			return self::$_instance = new self();
		}
    }
    

    if ( ! function_exists( 'devllo_events' ) ) {
		function devllo_events() {
			return devllo_events::instance();
		}
	}
	devllo_events();
}
$GLOBALS['devllo_events'] = devllo_events();