[gnome-calendar] utils: build an uuid string

[Erick Pérez Castellanos <erickpc src gnome org>]

commit 67732884bbd044fc838a3eca33a20686f4be9bab
Author: Erick Pérez Castellanos <erick red gmail com>
Date:   Tue Dec 2 16:29:18 2014 -0500

    utils: build an uuid string
    
    Use an ESource and ECalComponent to build an uuid string with the format specified

 src/gcal-utils.c |   37 +++++++++++++++++++++++++++++++++++++
 src/gcal-utils.h |    3 +++
 2 files changed, 40 insertions(+), 0 deletions(-)
---
diff --git a/src/gcal-utils.c b/src/gcal-utils.c
index 33aeab7..5a3c130 100644
--- a/src/gcal-utils.c
+++ b/src/gcal-utils.c
@@ -349,6 +349,43 @@ get_desc_from_component (ECalComponent *component,
   return desc;
 }
 
+/**
+ * get_uuid_from_component:
+ * @source: an { link ESource}
+ * @component: an { link ECalComponent}
+ *
+ * Obtains the uuid from a component in the form
+ * "source_uid:event_uid:event_rid" or "source:uid:event_uid" if the
+ * component doesn't hold a recurrence event
+ *
+ * Returns: (Transfer full) a new allocated string with the description
+ **/
+gchar*
+get_uuid_from_component (ESource       *source,
+                         ECalComponent *component)
+{
+  gchar *uuid;
+  ECalComponentId *id;
+
+  id = e_cal_component_get_id (component);
+  if (id->rid != NULL)
+    {
+      uuid = g_strdup_printf ("%s:%s:%s",
+                              e_source_get_uid (source),
+                              id->uid,
+                              id->rid);
+    }
+  else
+    {
+      uuid = g_strdup_printf ("%s:%s",
+                              e_source_get_uid (source),
+                              id->uid);
+    }
+  e_cal_component_free_id (id);
+
+  return uuid;
+}
+
 gint
 get_first_weekday (void)
 {
diff --git a/src/gcal-utils.h b/src/gcal-utils.h
index ac1bab7..25ecccf 100644
--- a/src/gcal-utils.h
+++ b/src/gcal-utils.h
@@ -81,6 +81,9 @@ void            print_date                                      (const gchar*
 gchar*          get_desc_from_component                         (ECalComponent         *component,
                                                                  const gchar           *joint_char);
 
+gchar*          get_uuid_from_component                         (ESource               *source,
+                                                                 ECalComponent         *component);
+
 gint            get_first_weekday                               (void);
 
 /* code brought from evolution */