fixed "import seafevets" when events disabled

handlers.py

@@ -1,42 +1,53 @@
-import seafevents
-from utils import get_seafevents_session
+import settings
 
-def repo_created_cb(sender, **kwargs):
-    creator = kwargs['creator']
-    repo_id = kwargs['repo_id']
-    repo_name = kwargs['repo_name']
+if not hasattr(settings, 'EVENTS_CONFIG_FILE'):
+    def repo_created_cb(sender, **kwargs):
+        pass
 
-    detail = {
-        'creator': creator,
-        'repo_id': repo_id,
-        'repo_name': repo_name,
-    }
+    def repo_deleted_cb(sender, **kwargs):
+        pass
+else:        
 
-    users = [creator]
+    import seafevents
+    from utils import get_seafevents_session
 
-    session = get_seafevents_session()
-    seafevents.save_user_events (session, 'repo-create', detail, users, None)
-    session.close()
+    def repo_created_cb(sender, **kwargs):
+        creator = kwargs['creator']
+        repo_id = kwargs['repo_id']
+        repo_name = kwargs['repo_name']
 
-def repo_deleted_cb(sender, **kwargs):
-    """When a repo is deleted, an event would be added to every user in all
-    groups to which this repo is shared.
+        detail = {
+            'creator': creator,
+            'repo_id': repo_id,
+            'repo_name': repo_name,
+        }
 
-    """
-    usernames = kwargs['usernames']
-    
-    repo_owner = kwargs['repo_owner']
-    repo_id = kwargs['repo_id']
-    repo_name = kwargs['repo_name']
+        users = [creator]
 
-    detail = {
-        'repo_owner': repo_owner,
-        'repo_id': repo_id,
-        'repo_name': repo_name,
-    }
+        session = get_seafevents_session()
+        seafevents.save_user_events (session, 'repo-create', detail, users, None)
+        session.close()
 
-    users = usernames
+    def repo_deleted_cb(sender, **kwargs):
+        """When a repo is deleted, an event would be added to every user in all
+        groups to which this repo is shared.
+
+        """
+        usernames = kwargs['usernames']
+
+        repo_owner = kwargs['repo_owner']
+        repo_id = kwargs['repo_id']
+        repo_name = kwargs['repo_name']
+
+        detail = {
+            'repo_owner': repo_owner,
+            'repo_id': repo_id,
+            'repo_name': repo_name,
+        }
+
+        users = usernames
+
+        session = get_seafevents_session()
+        seafevents.save_user_events (session, 'repo-delete', detail, users, None)
+        session.close()
 
-    session = get_seafevents_session()
-    seafevents.save_user_events (session, 'repo-delete', detail, users, None)
-    session.close()