Issue #2035: Validate appointment edit on server side

Author: Rui Alves

Kernel/Modules/AgentAppointmentEdit.pm

@@ -1095,6 +1095,41 @@ sub Run {
     # add/edit appointment
     # ------------------------------------------------------------ #
     elsif ( $Self->{Subaction} eq 'EditAppointment' ) {
+
+        my $ErrorMessage;
+
+        if ( !$GetParam{Title} ) {
+            $ErrorMessage = 'Title is required!';
+        }
+        elsif ( !$GetParam{CalendarID} ) {
+            $ErrorMessage = 'Calendar is required!';
+        }
+        elsif ( $GetParam{RecurrenceLimit} eq "2" && ( !$GetParam{RecurrenceCount} ) ) {
+            $ErrorMessage = 'Recurrence value is required!';
+        }
+        elsif ( $GetParam{RecurrenceLimit} eq "2" && ( $GetParam{RecurrenceCount} !~ /\d\d/ || $GetParam{RecurrenceCount} < 1 ) ) {
+            $ErrorMessage = 'Not a valid recurrence value!';
+        }
+
+        if ($ErrorMessage) {
+
+            # build JSON output
+            $JSON = $LayoutObject->JSONEncode(
+                Data => {
+                    Success => 0,
+                    Error   => Translatable($ErrorMessage),
+                },
+            );
+
+            # send JSON response
+            return $LayoutObject->Attachment(
+                ContentType => 'application/json',
+                Content     => $JSON,
+                Type        => 'inline',
+                NoCache     => 1,
+            );
+        }
+
         my %Appointment;
         if ( $GetParam{AppointmentID} ) {
             %Appointment = $AppointmentObject->AppointmentGet(