[Forminator] Disallow guests to vote in polls

wpmudev-forminator-poll-login-vote.php

<?php
/**
* Plugin Name: [Forminator] Disallow guests to vote in polls
* Plugin URI: https://premium.wpmudev.org/
* Description: This plugin disables voting for guest users (as of 1.10.2)
* Author: Alessandro Kaounas @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/

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

if ( ! class_exists( 'WPMUDEV_Forminator_Poll_Login_Vote' ) ) {
    
    class WPMUDEV_Forminator_Poll_Login_Vote {

		// Settings
		private $url = ''; // Add url to redirect. Default: WP Login Page
		private $forms = array( 73 ); // Form ids which limitation will apply seperated with commas

		private static $_instance = null;

        public static function get_instance() {

            if( is_null( self::$_instance ) ){
                self::$_instance = new WPMUDEV_Forminator_Poll_Login_Vote();
            }
            return self::$_instance;
            
        }

        private function __construct() {

			$this->init();

		}

		private function init(){
			
			// Add CSS for guest users
			add_action( "wp_enqueue_scripts", array( $this, "wpmudev_forminator_poll_login_note"  ) );
			// Add content before render the form
			add_action( "forminator_before_form_render", array( $this, "wpmudev_forminator_init" ), 10, 2 );
			// Prevent submissions from guests
			add_action( "forminator_polls_before_handle_submit", array( $this, "wpmudev_forminator_polls_before_handle_submit" ) );
			// Prevent AJAX submissions from guests
			add_action( "forminator_polls_before_save_entry", array( $this, "wpmudev_forminator_polls_before_save_entry" ) );

		}

		public function wpmudev_forminator_init( $id, $form_type ){

			if( ! in_array( $id, $this->forms ) && is_user_logged_in() ){
				return;
			}

			// Include a login message to the form
			add_filter( "forminator_poll_header", array( $this, "wpmudev_forminator_poll_header" ) );
			// Add class to guest form
			add_filter( "forminator_render_form_design_class", array( $this, "wpmudev_forminator_render_form_design_class" ) );

		}

		public function wpmudev_forminator_polls_before_handle_submit( $form_id ){
			
			if( ! in_array( $id, $this->forms ) && is_user_logged_in() ){
				return;
			}
			
			wp_die( __( 'Guests are not allowed to vote!', Forminator::DOMAIN ), __( 'Forminator error', Forminator::DOMAIN ), array( 'back_link' => true ) );
		
		}
		
		public function wpmudev_forminator_polls_before_save_entry( $form_id ){

			if( ! in_array( $id, $this->forms ) && is_user_logged_in() ){
				return;
			}
		
			$response = array(
				'success' => false,
				'notice'  => 'error',
				'message' => __( 'Guests are not allowed to vote!', Forminator::DOMAIN )
			);
			
			wp_send_json_error( $response );
			
			exit;
		
		}
		
		public function wpmudev_forminator_poll_header( $html ){
			
			if( ! is_user_logged_in() && ! isset( $_REQUEST['saved'] ) ){

				$html = '<div class="forminator-poll-note"><p><a href="' . ( $this->url === '' ? wp_login_url() : $this->url ) .'">' . __( 'Login to vote', Forminator::DOMAIN ) . '</a></p></div>' . $html;

			}

			return $html;

		}
		
		public function wpmudev_forminator_render_form_design_class( $classes ){
			
			if( ! is_user_logged_in() ){

				$classes .= ' forminator-poll--guest';

			}

			return $classes;

		}
		
		public function wpmudev_forminator_poll_login_note(){

			global $post;
			
			if ( is_a( $post, 'WP_Post' ) && has_shortcode( $post->post_content, 'forminator_poll') ) {

				wp_register_style( 'wpmudev_forminator_poll_login_note', false );
				wp_enqueue_style( 'wpmudev_forminator_poll_login_note' );
				  
				wp_add_inline_style( 'wpmudev_forminator_poll_login_note', '
					form.forminator-poll.forminator-poll--guest{
						border: 2px solid #ddd !important;
						padding: 10px !important;
					}
					form.forminator-poll--guest > .forminator-poll-note{
						position: absolute;
						display: flex;
						z-index: 10;
						top: 0;
						left: 0;
						width: 100%;
						height: 100%;
						flex-direction: column;
						align-items: center;
						justify-content: center;
					}
					form.forminator-poll--guest > .forminator-poll-note > p{
						border: 2px solid #ddd;
						padding: 5px 10px;
						background: #fff;
					}
					form.forminator-poll--guest{
						position: relative;
					  }
					  form.forminator-poll--guest::before {
						content: "";
						position: absolute;
						background: #fff;
						width: 100%;
						height: 100%;
						z-index: 10;
						top: 0;
						left: 0;
						opacity: 0.75;
					  }'
				);
				
			}
		
		}
		
	}


	if ( ! function_exists( 'wpmudev_forminator_poll_login_vote' ) ) {

        function wpmudev_forminator_poll_login_vote() {
            return WPMUDEV_Forminator_Poll_Login_Vote::get_instance();
        };

        add_action( 'plugins_loaded', 'wpmudev_forminator_poll_login_vote', 99 );
    }

}