backends: Let TaskWarrior inherit from Backend

[etc/taskwarrior.git] / tasklib / backends.py

diff --git a/tasklib/backends.py b/tasklib/backends.py
index 6bba35dcc3b367dcc64f9a090aedeac3ace28a64..12144f58d50b419c685c25a7b400a1932d75711b 100644 (file)
--- a/tasklib/backends.py
+++ b/tasklib/backends.py
@@ -1,4 +1,5 @@
 import abc
+import copy
 import datetime
 import json
 import logging
@@ -80,7 +81,7 @@ class TaskWarriorException(Exception):
     pass
 
 
-class TaskWarrior(object):
+class TaskWarrior(Backend):
 
     VERSION_2_1_0 = six.u('2.1.0')
     VERSION_2_2_0 = six.u('2.2.0')
@@ -186,8 +187,8 @@ class TaskWarrior(object):
 
         old_dependencies = task._original_data.get('depends', set())
 
-        added = self['depends'] - old_dependencies
-        removed = old_dependencies - self['depends']
+        added = task['depends'] - old_dependencies
+        removed = old_dependencies - task['depends']
 
         # Removed dependencies need to be prefixed with '-'
         return 'depends:' + ','.join(
@@ -217,6 +218,8 @@ class TaskWarrior(object):
                              "datetime, its type is not supported: {}"
                              .format(type(value)))
 
+        return localized
+
     @property
     def filter_class(self):
         return TaskWarriorFilter