Smart Coupons By URL Cartflows integration

functions.php

/*-- Smart Coupons By URL Integration --*/
add_action( 'cartflows_checkout_after_configure_cart', 'cartflows_smart_coupons_apply_coupon_from_url', 10, 1 );
function cartflows_smart_coupons_apply_coupon_from_url( $checkout_id ) {

            $cart = ( is_object( WC() ) && isset( WC()->cart ) ) ? WC()->cart : null;

			parse_str( wp_unslash( $_SERVER['QUERY_STRING'] ), $coupon_args ); // phpcs:ignore
			$coupon_args = wc_clean( $coupon_args );

            // If Coupons are in URL
			if ( isset( $coupon_args['coupon-code'] ) && ! empty( $coupon_args['coupon-code'] ) ) {

				$coupon_args['coupon-code'] = urldecode( $coupon_args['coupon-code'] );

				$coupon_codes = explode( ',', $coupon_args['coupon-code'] );

				$coupon_codes = array_filter( $coupon_codes ); // Remove empty coupon codes if any.

				$cart = ( is_object( WC() ) && isset( WC()->cart ) ) ? WC()->cart : null;

				$coupons_data = array();

				foreach ( $coupon_codes as $coupon_index => $coupon_code ) {
					// Process only first five coupons to avoid GET request parameter limit.
					if ( apply_filters( 'wc_sc_max_url_coupons_limit', 5 ) === $coupon_index ) {
						break;
					}

					if ( empty( $coupon_code ) ) {
						continue;
					}

					$coupons_data[] = array(
						'coupon-code' => $coupon_code,
					);
				}

                //set a cookie for storing of 1 hour
				wc_setcookie( 'sc_applied_url_coupon_cartflow', json_encode($coupons_data), time()+3600 );
				
				// apply them now if nothing stops us
				if ( $cart ) {
					foreach ( $coupons_data as $coupon_data ) {
						$coupon_code = $coupon_data['coupon-code'];
						if ( ! WC()->cart->has_discount( $coupon_code ) ) {
							WC()->cart->add_discount( trim( $coupon_code ) );
						}
					}
				}
                
             // Or check if we put them in a cookie
			} else {
			    if( ! empty( $_COOKIE['sc_applied_url_coupon_cartflow'] ) ){
			        $applied_coupon_from_url  = wc_clean( wp_unslash( $_COOKIE['sc_applied_url_coupon_cartflow'] ) );
			        
			        $applied_coupon_from_url  = json_decode($applied_coupon_from_url, true);

			    } else {
			        return;
			    }

			    foreach ( $applied_coupon_from_url as $index => $coupon_code ) {
				$coupon = new WC_Coupon( $coupon_code['coupon-code'] );
				    if ( $coupon->is_valid() && ! WC()->cart->has_discount( $coupon_code['coupon-code'] ) ) {
					    WC()->cart->add_discount( trim( $coupon_code['coupon-code'] ) );
				    	unset( $applied_coupon_from_url[ $index ] );
				    }
			    }
			    
			}

}