Fetch PrivacyStatementURL from UIInfo PrivacyStatementURL before deprecated privacypolicy (#6)

* Fetch Source and Destination PrivacyStatementURL and make it precedence over deprecated privacypolicy

Author: nordlolek

www/getconsent.php

@@ -160,8 +160,12 @@
 $t->data['dstName'] = $dstName;
 
 // Fetch privacypolicy
-if (array_key_exists('privacypolicy', $state['Destination'])) {
+if (array_key_exists('PrivacyStatementURL', $state['Destination']['UIInfo']) && (!empty($state['Destination']['UIInfo']['PrivacyStatementURL']))) {
+    $privacypolicy = reset($state['Destination']['UIInfo']['PrivacyStatementURL']);
+} elseif (array_key_exists('privacypolicy', $state['Destination'])) {
     $privacypolicy = $state['Destination']['privacypolicy'];
+} elseif (array_key_exists('PrivacyStatementURL', $state['Source']['UIInfo']) && (!empty($state['Source']['UIInfo']['PrivacyStatementURL']))) {
+    $privacypolicy = reset($state['Source']['UIInfo']['PrivacyStatementURL']);
 } elseif (array_key_exists('privacypolicy', $state['Source'])) {
     $privacypolicy = $state['Source']['privacypolicy'];
 } else {