[evolution-ews] Collect differences between original calendar item and modified calendar item atatchments

[Or Goshen <ogosh src gnome org>]

commit 51018fff047ccf0df2e69c3a524bb1bbae37d7a2
Author: Or Goshen <orx goshen intel com>
Date:   Sun Jun 19 17:13:57 2011 +0300

    Collect differences between original calendar item and modified calendar item atatchments

 src/calendar/e-cal-backend-ews-utils.c |   26 ++++++++++++++++++++++++++
 src/calendar/e-cal-backend-ews-utils.h |    1 +
 2 files changed, 27 insertions(+), 0 deletions(-)
---
diff --git a/src/calendar/e-cal-backend-ews-utils.c b/src/calendar/e-cal-backend-ews-utils.c
index 3cd6e1a..9e1f57d 100644
--- a/src/calendar/e-cal-backend-ews-utils.c
+++ b/src/calendar/e-cal-backend-ews-utils.c
@@ -471,3 +471,29 @@ void ewscal_set_reccurence_exceptions (ESoapMessage *msg, icalcomponent *comp)
 
 	e_soap_message_end_element (msg); /* "DeletedOccurrences" */
 }
+
+void ewscal_get_attach_differences (const GSList *original, const GSList *modified, GSList **removed, GSList **added)
+{
+	gboolean flag;
+	GSList *i, *i_next, *j, *j_next, *original_copy, *modified_copy;
+	original_copy = g_slist_copy ((GSList *)original);
+	modified_copy = g_slist_copy ((GSList *)modified);
+
+	for (j = modified_copy; j; j = j_next) {
+		j_next = j->next;
+
+		for (i = original_copy, flag = FALSE; !flag && i; i = i_next) {
+			i_next = i->next;
+
+			if (g_strcmp0 (j->data, i->data) == 0) {
+				/* Remove from the lists attachments that are on both */
+				original_copy = g_slist_delete_link (original_copy, i);
+				modified_copy = g_slist_delete_link (modified_copy, j);
+				flag = TRUE;
+			}
+		}
+	}
+
+	*removed = original_copy;
+	*added = modified_copy;
+}
diff --git a/src/calendar/e-cal-backend-ews-utils.h b/src/calendar/e-cal-backend-ews-utils.h
index e8d85d4..47b227f 100644
--- a/src/calendar/e-cal-backend-ews-utils.h
+++ b/src/calendar/e-cal-backend-ews-utils.h
@@ -35,6 +35,7 @@ void ewscal_set_time (ESoapMessage *msg, const gchar *name, icaltimetype *t);
 void ewscal_set_timezone (ESoapMessage *msg, const gchar *name, icaltimezone *icaltz);
 void ewscal_set_reccurence (ESoapMessage *msg, icalproperty *rrule, icaltimetype *dtstart);
 void ewscal_set_reccurence_exceptions (ESoapMessage *msg, icalcomponent *comp);
+void ewscal_get_attach_differences (const GSList *original, const GSList *modified, GSList **removed, GSList **added);
 
 G_END_DECLS