ic
	 * @author Grégory Viguier
	 *
	 * @param  int|null $value Option value.
	 * @return int|null
	 */
	public function is_mobile_plugin_active_callback( $value ) {
		if ( static::is_mobile_plugin_active() ) {
			return 1;
		}

		return $value;
	}

	/** ----------------------------------------------------------------------------------------- */
	/** MAIN HELPERS ============================================================================ */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Update the config file and the advanced cache file.
	 *
	 * @since  3.2
	 * @access public
	 * @author Grégory Viguier
	 */
	public static function update_mobile_cache_activation() {
		// Reset class cache.
		static::reset_class_cache();

		// Update the config file.
		rocket_generate_config_file();
		// Update the advanced cache file.
		rocket_generate_advanced_cache_file();
		// Flush htaccess file.
		flush_rocket_htaccess();
	}

	/**
	 * Reset `is_mobile_plugin_active()` cache.
	 *
	 * @since  3.2
	 * @access public
	 * @author Grégory Viguier
	 */
	public static function reset_class_cache() {
		// Reset class cache.
		unset( static::$is_mobile_active[ get_current_network_id() ][ get_current_blog_id() ] );
	}

	/**
	 * Get the concerned plugins.
	 *
	 * @since  3.2
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return array
	 */
	public static function get_mobile_plugins() {
		return [
			'jetpack/jetpack.php'                      => [
				'is_active_callback' => function () {
					if ( ! class_exists( 'Jetpack' ) ) {
						return false;
					}
					return \Jetpack::is_active() && \Jetpack::is_module_active( 'minileven' );
				},
				'activation_hook'    => 'jetpack_activate_module_minileven',
				'deactivation_hook'  => 'jetpack_deactivate_module_minileven',
			],
			'wptouch/wptouch.php'                      => [],
			'wiziapp-create-your-own-native-iphone-app/wiziapp.php' => [],
			'wordpress-mobile-pack/wordpress-mobile-pack.php' => [],
			'wp-mobilizer/wp-mobilizer.php'            => [],
			'wp-mobile-edition/wp-mobile-edition.php'  => [],
			'device-theme-switcher/dts_controller.php' => [],
			'wp-mobile-detect/wp-mobile-detect.php'    => [],
			'easy-social-share-buttons3/easy-social-share-buttons3.php' => [],
			'jet-menu/jet-menu.php'                    => [],
			'wpdiscuz/class.WpdiscuzCore.php'          => [],
		];
	}

	/**
	 * Tell if a mobile plugin is active.
	 *
	 * @since  3.2
	 * @access public
	 * @author Grégory Viguier
	 *
	 * @return bool True if a mobile plugin in the list is active, false otherwise.
	 */
	public static function is_mobile_plugin_active() {
		$network_id = get_current_network_id();
		$blog_id    = get_current_blog_id();

		if ( isset( static::$is_mobile_active[ $network_id ][ $blog_id ] ) ) {
			return static::$is_mobile_active[ $network_id ][ $blog_id ];
		}

		if ( ! function_exists( '\is_plugin_active' ) ) {
			include_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

		if ( ! isset( static::$is_mobile_active[ $network_id ] ) ) {
			static::$is_mobile_active[ $network_id ] = [];
		}

		foreach ( static::get_mobile_plugins() as $mobile_plugin => $mobile_plugin_data ) {
			if ( \is_plugin_active( $mobile_plugin ) &&
					isset( $mobile_plugin_data['is_active_callback'] ) &&
					call_user_func( $mobile_plugin_data['is_active_callback'] ) ) {
				static::$is_mobile_active[ $network_id ][ $blog_id ] = true;
				return true;
			}
			if ( \is_plugin_active( $mobile_plugin ) &&
					! isset( $mobile_plugin_data['is_active_callback'] ) ) {
				static::$is_mobile_active[ $network_id ][ $blog_id ] = true;
				return true;
			}
		}

		static::$is_mobile_active[ $network_id ][ $blog_id ] = false;
		return false;
	}
}