X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/e246808b933d3930e4e3cc18a7e552b5f42148db..a39f27ce1b92af11794fde4f0b7badc8a39d0d6f:/tasklib/task.py diff --git a/tasklib/task.py b/tasklib/task.py index 0a74f6c..9b3626d 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -29,6 +29,18 @@ class SerializingObject(object): """ Common ancestor for TaskResource & TaskFilter, since they both need to serialize arguments. + + Serializing method should hold the following contract: + - any empty value (meaning removal of the attribute) + is deserialized into a empty string + - None denotes a empty value for any attribute + + Deserializing method should hold the following contract: + - None denotes a empty value for any attribute (however, + this is here as a safeguard, TaskWarrior currently does + not export empty-valued attributes) if the attribute + is not iterable (e.g. list or set), in which case + a empty iterable should be used. """ def _deserialize(self, key, value): @@ -43,7 +55,7 @@ class SerializingObject(object): def timestamp_serializer(self, date): if not date: - return None + return '' return date.strftime(DATE_FORMAT) def timestamp_deserializer(self, date_str): @@ -98,9 +110,10 @@ class SerializingObject(object): return tags.split(',') if tags else [] return tags or [] - def serialize_depends(self, cur_dependencies): + def serialize_depends(self, value): # Return the list of uuids - return ','.join(task['uuid'] for task in cur_dependencies) + value = value if value is not None else set() + return ','.join(task['uuid'] for task in value) def deserialize_depends(self, raw_uuids): raw_uuids = raw_uuids or '' # Convert None to empty string @@ -207,7 +220,7 @@ class Task(TaskResource): pass @classmethod - def from_input(cls, modify=False): + def from_input(cls, input_file=sys.stdin, modify=None): """ Creates a Task object, directly from the stdin, by reading one line. If modify=True, two lines are used, first line interpreted as the @@ -218,18 +231,25 @@ class Task(TaskResource): Object created by this method should not be saved, deleted or refreshed, as t could create a infinite loop. For this reason, TaskWarrior instance is set to None. + + Input_file argument can be used to specify the input file, + but defaults to sys.stdin. """ # TaskWarrior instance is set to None task = cls(None) + # Detect the hook type if not given directly + name = os.path.basename(sys.argv[0]) + modify = name.startswith('on-modify') if modify is None else modify + # Load the data from the input - task._load_data(json.loads(sys.stdin.readline().strip())) + task._load_data(json.loads(input_file.readline().strip())) # If this is a on-modify event, we are provided with additional # line of input, which provides updated data if modify: - task._update_data(json.loads(sys.stdin.readline().strip())) + task._update_data(json.loads(input_file.readline().strip())) return task @@ -273,11 +293,19 @@ class Task(TaskResource): def _modified_fields(self): writable_fields = set(self._data.keys()) - set(self.read_only_fields) for key in writable_fields: - if self._data.get(key) != self._original_data.get(key): + new_value = self._data.get(key) + old_value = self._original_data.get(key) + + # Make sure not to mark data removal as modified field if the + # field originally had some empty value + if key in self._data and not new_value and not old_value: + continue + + if new_value != old_value: yield key @property - def _is_modified(self): + def modified(self): return bool(list(self._modified_fields)) @property @@ -302,7 +330,7 @@ class Task(TaskResource): def serialize_depends(self, cur_dependencies): # Check that all the tasks are saved - for task in cur_dependencies: + for task in (cur_dependencies or set()): if not task.saved: raise Task.NotSaved('Task \'%s\' needs to be saved before ' 'it can be set as dependency.' % task) @@ -370,7 +398,7 @@ class Task(TaskResource): self.refresh(only_fields=['status']) def save(self): - if self.saved and not self._is_modified: + if self.saved and not self.modified: return args = [self['uuid'], 'modify'] if self.saved else ['add'] @@ -419,13 +447,21 @@ class Task(TaskResource): def add_field(field): # Add the output of format_field method to args list (defaults to # field:value) - serialized_value = self._serialize(field, self._data[field]) or '' - format_default = lambda: "{0}:{1}".format( - field, - "'{0}'".format(serialized_value) if serialized_value else '' - ) + serialized_value = self._serialize(field, self._data[field]) + + # Empty values should not be enclosed in quotation marks, see + # TW-1510 + if serialized_value is '': + escaped_serialized_value = '' + else: + escaped_serialized_value = "'{0}'".format(serialized_value) + + format_default = lambda: "{0}:{1}".format(field, + escaped_serialized_value) + format_func = getattr(self, 'format_{0}'.format(field), format_default) + args.append(format_func()) # If we're modifying saved task, simply pass on all modified fields @@ -464,7 +500,14 @@ class Task(TaskResource): """ # We need to remove spaces for TW-1504, use custom separators - return json.dumps(self._data, separators=(',',':')) + data_tuples = ((key, self._serialize(key, value)) + for key, value in six.iteritems(self._data)) + + # Empty string denotes empty serialized value, we do not want + # to pass that to TaskWarrior. + data_tuples = filter(lambda t: t[1] is not '', data_tuples) + data = dict(data_tuples) + return json.dumps(data, separators=(',',':')) class TaskFilter(SerializingObject): """