refactor entry file

source/connector-mobilizon/connector-mobilizon.php

@@ -20,23 +20,48 @@ if (!defined('ABSPATH')) {
   exit;
 }
 
-function mobilizon_connector_activate() {
+final class Mobilizon_Connector {
+
+  private function __construct() {
+    add_action('init', [$this, 'register_settings']);
+    add_action('init', [$this, 'register_shortcut']);
+    add_action('widgets_init', [$this, 'register_widget']);
+    add_action('wp_enqueue_scripts', [$this, 'register_scripts']);
+    register_activation_hook(__FILE__, [$this, 'enable_activation']);
+  }
+
+  public static function init() {
+    // Create singleton instance.
+    static $instance = false;
+    if(!$instance) {
+        $instance = new self();
+    }
+    return $instance;
+  }
+
+  public function enable_activation() {
     MobilizonConnector\Settings::setDefaultOptions();
-}
-register_activation_hook(__FILE__, 'mobilizon_connector_activate');
+  }
 
-function mobilizon_connector_initialize() {
+  public function register_settings() {
     MobilizonConnector\Settings::init();
-  MobilizonConnector\EventsListShortcut::init();
-}
-add_action('init', 'mobilizon_connector_initialize');
+  }
 
-function mobilizon_connector_load_scripts() {
+  public function register_scripts() {
     wp_enqueue_script(MobilizonConnector\NAME . '-js', plugins_url('front/events-loader.js', __FILE__ ));
-}
-add_action('wp_enqueue_scripts', 'mobilizon_connector_load_scripts');
+  }
 
-function mobilizon_connector_register_events_list_widget() {
+  public function register_shortcut() {
+    MobilizonConnector\EventsListShortcut::init();
+  }
+
+  public function register_widget() {
     register_widget('MobilizonConnector\EventsListWidget');
+  }
 }
-add_action('widgets_init', 'mobilizon_connector_register_events_list_widget');
+
+function mobilizon_connector_run_plugin() {
+  return Mobilizon_Connector::init();
+}
+
+mobilizon_connector_run_plugin();