function edd_ajax_apply_discount() {
  if ( isset( $_POST['code'] ) ) {

    $discount_code = sanitize_text_field( $_POST['code'] );

    $return = array(
      'msg'  => '',
      'code' => $discount_code
    );

    $user = '';

    if ( is_user_logged_in() ) {
      $user = get_current_user_id();
    } else {
      parse_str( $_POST['form'], $form );
      if ( ! empty( $form['edd_email'] ) ) {
        $user = urldecode( $form['edd_email'] );
      }
    }

    if ( edd_is_discount_valid( $discount_code, $user ) ) {
      $discount  = edd_get_discount_by_code( $discount_code );
      $amount    = edd_format_discount_rate( edd_get_discount_type( $discount->ID ), edd_get_discount_amount( $discount->ID ) );
      $discounts = edd_set_cart_discount( $discount_code );
      $total     = edd_get_cart_total( $discounts );

      $return = array(
        'msg'         => 'valid',
        'amount'      => $amount,
        'total_plain' => $total,
        'total'       => html_entity_decode( edd_currency_filter( edd_format_amount( $total ) ), ENT_COMPAT, 'UTF-8' ),
        'code'        => $discount_code,
        'html'        => edd_get_cart_discounts_html( $discounts )
      );
    } else {
      $errors = edd_get_errors();
      $return['msg']  = $errors['edd-discount-error'];
      edd_unset_error( 'edd-discount-error' );
    }

    // Allow for custom discount code handling
    $return = apply_filters( 'edd_ajax_discount_response', $return );

    echo json_encode($return);
  }
  edd_die();
}