add filter to allow hooking into transaction data before signing

includes/abstracts/class-wc-banklink-ipizza.php

@@ -239,6 +239,9 @@ function generate_submit_form( $order_id ) {
 			'VK_DATETIME' => $datetime->format( DateTime::ISO8601 )
 		);
 
+		// Allow hooking into the data
+		$mac_fields = $this->hookable_transaction_data( $mac_fields, $order );
+
 		// Generate MAC string from the private key
 		$key        = openssl_pkey_get_private( $this->get_option( 'vk_privkey' ), $this->get_option( 'vk_pass' ) );
 		$signature  = '';

includes/abstracts/class-wc-banklink-solo.php

@@ -100,6 +100,9 @@ function generate_submit_form( $order_id ) {
 			'SOLOPMT_CUR'         => get_woocommerce_currency(),
 		);
 
+		// Allow hooking into the data
+		$mac_fields                = $this->hookable_transaction_data( $mac_fields, $order );
+
 		// Generate MAC string
 		$mac_fields['SOLOPMT_MAC'] = $this->generate_mac_string( $mac_fields );
 

includes/abstracts/class-wc-banklink.php

@@ -181,4 +181,15 @@ function debug( $data, $level = 'debug' ) {
 			}
 		}
 	}
+
+	/**
+	 * Creates a filter for altering transaction data
+	 *
+	 * @param  array    $data  Transaction data
+	 * @param  WC_Order $order Order
+	 * @return array           Modified transaction data
+	 */
+	function hookable_transaction_data( $data, $order ) {
+		return apply_filters( 'woocommerce_' . $this->id . '_gateway_transaction_fields', $data, $order );
+	}
 }

includes/gateways/class-wc-banklink-estcard-gateway.php

@@ -83,7 +83,7 @@ function generate_submit_form( $order_id ) {
 		$lang_code           = in_array( $lang, $accepted_lang_codes ) ? $lang : 'en';
 
 		// Set MAC fields
-		$mac_fields  = array(
+		$mac_fields          = array(
 			'action'         => 'gaf',
 			'ver'            => '004',
 			'id'             => $this->get_option( 'merchant_id' ),
@@ -98,6 +98,9 @@ function generate_submit_form( $order_id ) {
 			'charEncoding'   => 'utf-8'
 		);
 
+		// Allow hooking into the data
+		$mac_fields = $this->hookable_transaction_data( $mac_fields, $order );
+
 		$key        = openssl_pkey_get_private( $this->get_option( 'private_key' ), $this->get_option( 'private_key_pass' ) );
 		$signature  = '';
 		$mac_string = $this->generate_mac_string( $mac_fields );

includes/gateways/class-wc-banklink-maksekeskus-redirect-gateway.php

@@ -97,6 +97,9 @@ function generate_submit_form( $order_id ) {
 			)
 		);
 
+		// Allow hooking into the data
+		$request     = $this->hookable_transaction_data( $request, $order );
+
 		// Generate MAC code
 		$mac_code    = $this->get_signature( $request );