[evolution-ews] Be more forgiving with the invitation response status pairing

[Milan Crha <mcrha src gnome org>]

commit 3c932e97fdc07735f7ed7cdf052e2999ae8393a2
Author: Milan Crha <mcrha redhat com>
Date:   Mon Feb 18 13:42:25 2013 +0100

    Be more forgiving with the invitation response status pairing
    
    See bug #686024 for more information
    https://bugzilla.gnome.org/show_bug.cgi?id=686024

 src/calendar/e-cal-backend-ews.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/src/calendar/e-cal-backend-ews.c b/src/calendar/e-cal-backend-ews.c
index 8182bab..fdee560 100644
--- a/src/calendar/e-cal-backend-ews.c
+++ b/src/calendar/e-cal-backend-ews.c
@@ -2486,9 +2486,11 @@ e_ews_get_current_user_meeting_reponse (icalcomponent *icalcomp,
 {
        icalproperty *attendee;
        const gchar *attendee_str = NULL, *attendee_mail = NULL;
+       gint attendees_count = 0;
+
        for (attendee = icalcomponent_get_first_property (icalcomp, ICAL_ATTENDEE_PROPERTY);
                attendee != NULL;
-               attendee = icalcomponent_get_next_property (icalcomp, ICAL_ATTENDEE_PROPERTY)) {
+               attendee = icalcomponent_get_next_property (icalcomp, ICAL_ATTENDEE_PROPERTY), 
attendees_count++) {
                attendee_str = icalproperty_get_attendee (attendee);
 
                if (attendee_str != NULL) {
@@ -2496,10 +2498,20 @@ e_ews_get_current_user_meeting_reponse (icalcomponent *icalcomp,
                                attendee_mail = attendee_str + 7;
                        else
                                attendee_mail = attendee_str;
-                       if (g_strcmp0 (attendee_mail, current_user_mail) == 0)
+                       if (attendee_mail && current_user_mail && g_ascii_strcasecmp (attendee_mail, 
current_user_mail) == 0)
                                return icalproperty_get_parameter_as_string (attendee, "PARTSTAT");
                }
        }
+
+       /* this should not happen, but if the user's configured email does not match the one
+          used in the invitation, like when the invitation comes to a mailing list... */
+       if (attendees_count == 1) {
+               attendee = icalcomponent_get_first_property (icalcomp, ICAL_ATTENDEE_PROPERTY);
+               g_return_val_if_fail (attendee != NULL, NULL);
+
+               return icalproperty_get_parameter_as_string (attendee, "PARTSTAT");
+       }
+
        return NULL;
 }