[empathy] Add function ensure_chatroom to chatroom manager

[Guillaume Desmottes <gdesmott src gnome org>]

commit 2cf16f8c3b783ac09ed638633b34dffc50279106
Author: Jonas Bonn <jonas southpole se>
Date:   Fri Mar 5 16:42:05 2010 +0100

    Add function ensure_chatroom to chatroom manager
    
    This function tries to find an existing chatroom, but if it fails
    to do so it creates a new room and returns that instead.

 libempathy/empathy-chatroom-manager.c |   22 ++++++++++++++++++++++
 libempathy/empathy-chatroom-manager.h |    4 ++++
 2 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/libempathy/empathy-chatroom-manager.c b/libempathy/empathy-chatroom-manager.c
index d5513ca..cf3b753 100644
--- a/libempathy/empathy-chatroom-manager.c
+++ b/libempathy/empathy-chatroom-manager.c
@@ -632,6 +632,28 @@ empathy_chatroom_manager_find (EmpathyChatroomManager *manager,
 	return NULL;
 }
 
+EmpathyChatroom *
+empathy_chatroom_manager_ensure_chatroom (EmpathyChatroomManager *manager,
+					  TpAccount *account,
+					  const gchar *room,
+					  const gchar *name)
+{
+	EmpathyChatroom *chatroom;
+
+	chatroom = empathy_chatroom_manager_find (manager, account, room);
+
+	if (chatroom) {
+		return g_object_ref(chatroom);
+	} else {
+		chatroom = empathy_chatroom_new_full (account,
+			room,
+			name,
+			FALSE);
+		empathy_chatroom_manager_add (manager, chatroom);
+		return chatroom;
+	}
+}
+
 GList *
 empathy_chatroom_manager_get_chatrooms (EmpathyChatroomManager *manager,
 				       TpAccount *account)
diff --git a/libempathy/empathy-chatroom-manager.h b/libempathy/empathy-chatroom-manager.h
index 8ee2a89..9a1de18 100644
--- a/libempathy/empathy-chatroom-manager.h
+++ b/libempathy/empathy-chatroom-manager.h
@@ -62,6 +62,10 @@ void                   empathy_chatroom_manager_remove        (EmpathyChatroomMa
 EmpathyChatroom *       empathy_chatroom_manager_find          (EmpathyChatroomManager *manager,
 							      TpAccount               *account,
 							      const gchar             *room);
+EmpathyChatroom *      empathy_chatroom_manager_ensure_chatroom (EmpathyChatroomManager *manager,
+							      TpAccount               *account,
+							      const gchar             *room,
+							      const gchar             *name);
 GList *                empathy_chatroom_manager_get_chatrooms (EmpathyChatroomManager *manager,
 							      TpAccount               *account);
 guint                  empathy_chatroom_manager_get_count     (EmpathyChatroomManager *manager,