[empathy] add empathy_ensure_individual_from_tp_contact()

[Guillaume Desmottes <gdesmott src gnome org>]

commit 54bd693510f9aa2c1791d8ccf51f2b0371c66a3a
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Fri Feb 10 14:52:28 2012 +0100

    add empathy_ensure_individual_from_tp_contact()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669676

 libempathy/empathy-utils.c |   20 ++++++++++++++++++++
 libempathy/empathy-utils.h |    3 +++
 2 files changed, 23 insertions(+), 0 deletions(-)
---
diff --git a/libempathy/empathy-utils.c b/libempathy/empathy-utils.c
index 8e3509b..2f4c9ed 100644
--- a/libempathy/empathy-utils.c
+++ b/libempathy/empathy-utils.c
@@ -1195,3 +1195,23 @@ empathy_create_individual_from_tp_contact (TpContact *contact)
 
   return individual;
 }
+
+/* Look for a FolksIndividual containing @contact as one of his persona
+ * and create one if needed */
+FolksIndividual *
+empathy_ensure_individual_from_tp_contact (TpContact *contact)
+{
+  EmpathyIndividualManager *mgr;
+  FolksIndividual *individual;
+
+  mgr = empathy_individual_manager_dup_singleton ();
+  individual = empathy_individual_manager_lookup_by_contact (mgr, contact);
+
+  if (individual != NULL)
+    g_object_ref (individual);
+  else
+    individual = empathy_create_individual_from_tp_contact (contact);
+
+  g_object_unref (mgr);
+  return individual;
+}
diff --git a/libempathy/empathy-utils.h b/libempathy/empathy-utils.h
index ac5fef8..5ce8cc8 100644
--- a/libempathy/empathy-utils.h
+++ b/libempathy/empathy-utils.h
@@ -124,6 +124,9 @@ gboolean empathy_sasl_channel_supports_mechanism (TpChannel *channel,
 FolksIndividual * empathy_create_individual_from_tp_contact (
     TpContact *contact);
 
+FolksIndividual * empathy_ensure_individual_from_tp_contact (
+    TpContact *contact);
+
 /* Copied from wocky/wocky-utils.h */
 
 #define empathy_implement_finish_void(source, tag) \