class-gotreu-enable-default-country-reverse-charge.php

<?php // dont copy this line
/**
 * This snippet is written for the Gravity EU VAT plugin ( https://geekontheroad.com/eu-vat-for-gravity-forms )
 * It allows you to apply reverse charge tax for valid tax number of the default country
 * This snippet is compatible with GF EU VAT v1.0.8.3 and higher
 *
 * INSTRUCTIONS:
 * Copy/Paste the below code to your functions.php or code snippet plugin
 * Complete the configuration part at the bottom of this code
 *
 * @version 0.3
 * @author Johan d'Hollander
 * @link <https://geekontheroad.com>
 *
 **/

class GOTREU_Enable_Default_Country_Reverse_Charge {

    public function __construct($args = array()) {
        $this->_args = wp_parse_args($args, array(
            "form_ids"  => [], // Change to expect an array                        
        ));        
        add_action('wp_footer', array($this, 'register_init_script'), 99);
    }
    
    public function register_init_script() {
    	if (empty($this->_args['form_ids'])) return; // Exit if no form IDs are set
    
		// Convert form IDs to JSON for use in JavaScript
		$form_ids_json = json_encode($this->_args['form_ids']); 
		?>
		<script type="text/javascript">
			gform.addFilter('gotreu_default_country_reverse_charge', 'gotreu_enable_reverse_charge');

			function gotreu_enable_reverse_charge(isDefaultCountry, formId) {				
				var formIdStr = String(formId);				
				var targetFormIds = <?php echo $form_ids_json; ?>.map(String);
				if (targetFormIds.includes(formIdStr)) {  
					return false;
				}
				return isDefaultCountry;
			}
		</script>
		<?php
	}
}


// Required Configuration
new GOTREU_Enable_Default_Country_Reverse_Charge(array(
    "form_ids" => [2, 6], // Enter an array of form ids Example: [1,2,3,4]
));