From 9a52a9a1cee79e9b65f2152ad698f1cb9e076b08 Mon Sep 17 00:00:00 2001
From: Risto Niinemets <risto.niinemets@gmail.com>
Date: Wed, 13 Dec 2017 11:22:28 +0200
Subject: [PATCH] add filter to allow hooking into transaction data before
 signing

---
 includes/abstracts/class-wc-banklink-ipizza.php       |  3 +++
 includes/abstracts/class-wc-banklink-solo.php         |  3 +++
 includes/abstracts/class-wc-banklink.php              | 11 +++++++++++
 .../gateways/class-wc-banklink-estcard-gateway.php    |  5 ++++-
 ...class-wc-banklink-maksekeskus-redirect-gateway.php |  3 +++
 5 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/includes/abstracts/class-wc-banklink-ipizza.php b/includes/abstracts/class-wc-banklink-ipizza.php
index 0644eaf..307930e 100644
--- a/includes/abstracts/class-wc-banklink-ipizza.php
+++ b/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  = '';
diff --git a/includes/abstracts/class-wc-banklink-solo.php b/includes/abstracts/class-wc-banklink-solo.php
index 92bca12..238f3f2 100644
--- a/includes/abstracts/class-wc-banklink-solo.php
+++ b/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 );
 
diff --git a/includes/abstracts/class-wc-banklink.php b/includes/abstracts/class-wc-banklink.php
index c63e76f..4e4464d 100644
--- a/includes/abstracts/class-wc-banklink.php
+++ b/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 );
+	}
 }
\ No newline at end of file
diff --git a/includes/gateways/class-wc-banklink-estcard-gateway.php b/includes/gateways/class-wc-banklink-estcard-gateway.php
index c3ee7bb..6bf8598 100644
--- a/includes/gateways/class-wc-banklink-estcard-gateway.php
+++ b/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 );
diff --git a/includes/gateways/class-wc-banklink-maksekeskus-redirect-gateway.php b/includes/gateways/class-wc-banklink-maksekeskus-redirect-gateway.php
index 6375f3f..d44adca 100644
--- a/includes/gateways/class-wc-banklink-maksekeskus-redirect-gateway.php
+++ b/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 );