Fix changing ticket due date

api/Controllers/Tickets/StaffTicketController.php

@@ -10,6 +10,7 @@ use BusinessLogic\Tickets\TicketDeleter;
 use BusinessLogic\Tickets\TicketEditor;
 use BusinessLogic\Tickets\TicketRetriever;
 use Controllers\JsonRetriever;
+use Symfony\Component\Console\Helper\Helper;
 
 class StaffTicketController extends \BaseClass {
     function get($id) {
@@ -55,7 +56,14 @@ class StaffTicketController extends \BaseClass {
 
         $json = JsonRetriever::getJsonData();
 
-        $dueDate = date('Y-m-d H:i:s', strtotime(Helpers::safeArrayGet($json, 'dueDate')));
+        $newDueDate = Helpers::safeArrayGet($json, 'dueDate');
+
+        if ($newDueDate !== null) {
+            $dueDate = date('Y-m-d H:i:s', strtotime(Helpers::safeArrayGet($json, 'dueDate')));
+        } else {
+            $dueDate = null;
+        }
+
 
         $ticketEditor->updateDueDate($id, $dueDate, $userContext, $hesk_settings);
     }

internal-api/js/admin-ticket.js

@@ -20,14 +20,17 @@ $(document).ready(function() {
 
     $editableDueDateContainer.find('#submit').click(function() {
         var newDueDate = $editableDueDateContainer.find('input[type="text"][name="due-date"]').val();
+        var ticketId = $('input[type="hidden"][name="orig_id"]').val();
         $.ajax({
             method: 'POST',
-            url: heskPath + 'internal-api/admin/calendar/',
-            data: {
-                trackingId: $('input[type="hidden"][name="track"]').val(),
-                action: 'update-ticket',
-                dueDate: newDueDate
+            url: heskPath + 'api/v1/staff/tickets/' + ticketId + '/due-date',
+            headers: {
+                'X-Internal-Call': true,
+                'X-HTTP-Method-Override': 'PATCH'
             },
+            data: JSON.stringify({
+                dueDate: newDueDate === '' ? null : newDueDate
+            }),
             success: function() {
                 mfhAlert.success(mfhLang.text('ticket_due_date_updated'));
                 $readonlyDueDateContainer.find('span#due-date').text(newDueDate == '' ? $('#lang_none').text() : newDueDate);