Dynamically add fees based on selected payment gateway in WooCommerce #woocommerce #dynamic-fees #fees

child-theme-functions.js

jQuery(document).ready(function() {
    jQuery(document.body).on('change', 'input[name="payment_method"]', function() {
       jQuery('body').trigger('update_checkout');
    });
});

wc-payment-gateway-based-fees.php

<?php

function yanco_scripts() {
    if( !is_admin() ) {
        wp_register_script( 'yanco-child-theme-script', get_stylesheet_directory_uri() . '/assets/js/child-theme-functions.js', array('jquery'), null );

        if( is_checkout() ) {
            wp_enqueue_script( 'yanco-child-theme-script' );
        }
    }
}
add_action( 'wp_enqueue_scripts', 'yanco_scripts' );

if ( class_exists( 'WooCommerce' ) ) {
    add_action( 'woocommerce_cart_calculate_fees', 'yanco_ean_calculate_totals' );
    function yanco_ean_calculate_totals( ) {
		$available_gateways = WC()->payment_gateways->get_available_payment_gateways();
	    $current_gateway = '';
        $fee_title = 'EAN Ekspeditionsgebyr';

		if ( ! empty( $available_gateways ) ) {

	        // Chosen Method
	        if ( isset( WC()->session->chosen_payment_method ) && isset( $available_gateways[ WC()->session->chosen_payment_method ] ) ) {
				$current_gateway = $available_gateways[ WC()->session->chosen_payment_method ];
	        } elseif ( isset( $available_gateways[ get_option( 'woocommerce_default_gateway' ) ] ) ) {
	            $current_gateway = $available_gateways[ get_option( 'woocommerce_default_gateway' ) ];
	        } else {
	            $current_gateway = current( $available_gateways );
	        }
	    }

		if ( $current_gateway->id == 'yanco_wc_ean_payment_gateway' ) {
			WC()->cart->add_fee( $fee_title, 50*0.8 , true, '' );
		}
    }
}