Do only override gateway order button text in case the gateway has ex…

…plicitly set the button text. Added missing class attribute to direct debit.

includes/class-wc-gzd-payment-gateways.php

@@ -119,7 +119,9 @@ public function gateway_supports_fees( $id ) {
 	}
 
 	protected function maybe_force_gateway_button_text( $gateway ) {
-		if ( ! isset( $gateway->force_order_button_text ) || $gateway->force_order_button_text ) {
+		$button_text = $gateway->order_button_text;
+
+		if ( ! is_null( $button_text ) && ! empty( $button_text ) && ( ! isset( $gateway->force_order_button_text ) || $gateway->force_order_button_text ) ) {
 			/**
 			 * Filter to adjust the forced order submit button text per gateway.
 			 * By default Woo allows gateways to adjust the submit button text.
@@ -144,7 +146,6 @@ public function manipulate_gateways() {
 		$gateways = WC()->payment_gateways()->payment_gateways();
 
 		foreach ( $gateways as $gateway ) {
-
 			if ( 'yes' !== $gateway->enabled ) {
 				continue;
 			}
@@ -153,7 +154,6 @@ public function manipulate_gateways() {
 			$this->maybe_force_gateway_button_text( $gateway );
 
 			if ( $this->gateway_supports_fees( $gateway->id ) && $gateway->get_option( 'fee' ) ) {
-
 				$gateway_description = $this->gateway_data[ $gateway->id ]['description'];
 				$desc                = sprintf( __( '%s payment charge', 'woocommerce-germanized' ), wc_price( $gateway->get_option( 'fee' ) ) ) . '.';
 
@@ -171,7 +171,6 @@ public function manipulate_gateways() {
 				 *
 				 */
 				$gateway_description .= apply_filters( 'woocommerce_gzd_payment_gateway_description', ' ' . $desc, $gateway );
-
 				$gateway->description = $gateway_description;
 			}
 		}

includes/gateways/direct-debit/class-wc-gzd-gateway-direct-debit.php

@@ -20,6 +20,8 @@ class WC_GZD_Gateway_Direct_Debit extends WC_Payment_Gateway {
 
 	protected $enable_pre_notification;
 
+	protected $instructions;
+
 	protected $debit_days;
 
 	protected $generate_mandate_id;