X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/c83f05c25f184acd803c909a5bb905a351558e16..3a9e4aebe4359123804b6e5bca8c5678546b688e:/tasklib/task.py diff --git a/tasklib/task.py b/tasklib/task.py index 4cf93b1..9b3626d 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -5,6 +5,7 @@ import json import logging import os import six +import sys import subprocess DATE_FORMAT = '%Y%m%dT%H%M%SZ' @@ -24,15 +25,111 @@ class TaskWarriorException(Exception): pass -class TaskResource(object): +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): + hydrate_func = getattr(self, 'deserialize_{0}'.format(key), + lambda x: x if x != '' else None) + return hydrate_func(value) + + def _serialize(self, key, value): + dehydrate_func = getattr(self, 'serialize_{0}'.format(key), + lambda x: x if x is not None else '') + return dehydrate_func(value) + + def timestamp_serializer(self, date): + if not date: + return '' + return date.strftime(DATE_FORMAT) + + def timestamp_deserializer(self, date_str): + if not date_str: + return None + return datetime.datetime.strptime(date_str, DATE_FORMAT) + + def serialize_entry(self, value): + return self.timestamp_serializer(value) + + def deserialize_entry(self, value): + return self.timestamp_deserializer(value) + + def serialize_modified(self, value): + return self.timestamp_serializer(value) + + def deserialize_modified(self, value): + return self.timestamp_deserializer(value) + + def serialize_due(self, value): + return self.timestamp_serializer(value) + + def deserialize_due(self, value): + return self.timestamp_deserializer(value) + + def serialize_scheduled(self, value): + return self.timestamp_serializer(value) + + def deserialize_scheduled(self, value): + return self.timestamp_deserializer(value) + + def serialize_until(self, value): + return self.timestamp_serializer(value) + + def deserialize_until(self, value): + return self.timestamp_deserializer(value) + + def serialize_wait(self, value): + return self.timestamp_serializer(value) + + def deserialize_wait(self, value): + return self.timestamp_deserializer(value) + + def deserialize_annotations(self, data): + return [TaskAnnotation(self, d) for d in data] if data else [] + + def serialize_tags(self, tags): + return ','.join(tags) if tags else '' + + def deserialize_tags(self, tags): + if isinstance(tags, six.string_types): + return tags.split(',') if tags else [] + return tags or [] + + def serialize_depends(self, value): + # Return the list of uuids + 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 + uuids = raw_uuids.split(',') + return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid) + + +class TaskResource(SerializingObject): read_only_fields = [] def _load_data(self, data): - self._data = data + self._data = dict((key, self._deserialize(key, value)) + for key, value in data.items()) # We need to use a copy for original data, so that changes - # are not propagated. Shallow copy is alright, since data dict uses only - # primitive data types - self._original_data = data.copy() + # are not propagated. + self._original_data = copy.deepcopy(self._data) def _update_data(self, data, update_original=False): """ @@ -40,11 +137,12 @@ class TaskResource(object): updates should already be serialized. If update_original is True, the original_data dict is updated as well. """ - - self._data.update(data) + self._data.update(dict((key, self._deserialize(key, value)) + for key, value in data.items())) if update_original: - self._original_data.update(data) + self._original_data = copy.deepcopy(self._data) + def __getitem__(self, key): # This is a workaround to make TaskResource non-iterable @@ -55,22 +153,15 @@ class TaskResource(object): except ValueError: pass - return self._deserialize(key, self._data.get(key)) + if key not in self._data: + self._data[key] = self._deserialize(key, None) + + return self._data.get(key) def __setitem__(self, key, value): if key in self.read_only_fields: raise RuntimeError('Field \'%s\' is read-only' % key) - self._data[key] = self._serialize(key, value) - - def _deserialize(self, key, value): - hydrate_func = getattr(self, 'deserialize_{0}'.format(key), - lambda x: x) - return hydrate_func(value) - - def _serialize(self, key, value): - dehydrate_func = getattr(self, 'serialize_{0}'.format(key), - lambda x: x) - return dehydrate_func(value) + self._data[key] = value def __str__(self): s = six.text_type(self.__unicode__()) @@ -81,22 +172,6 @@ class TaskResource(object): def __repr__(self): return str(self) - def timestamp_serializer(self, date): - if not date: - return None - return date.strftime(DATE_FORMAT) - - def timestamp_deserializer(self, date_str): - if not date_str: - return None - return datetime.datetime.strptime(date_str, DATE_FORMAT) - - def serialize_entry(self, value): - return self.timestamp_serializer(value) - - def deserialize_entry(self, value): - return self.timestamp_deserializer(value) - class TaskAnnotation(TaskResource): read_only_fields = ['entry', 'description'] @@ -111,6 +186,11 @@ class TaskAnnotation(TaskResource): def __unicode__(self): return self['description'] + def __eq__(self, other): + # consider 2 annotations equal if they belong to the same task, and + # their data dics are the same + return self.task == other.task and self._data == other._data + __repr__ = __unicode__ @@ -139,6 +219,40 @@ class Task(TaskResource): """ pass + @classmethod + 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 + original state of the Task object, and second line as its new, + modified value. This is consistent with the TaskWarrior's hook + system. + + 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(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(input_file.readline().strip())) + + return task + def __init__(self, warrior, **kwargs): self.warrior = warrior @@ -179,9 +293,21 @@ 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 modified(self): + return bool(list(self._modified_fields)) + @property def completed(self): return self['status'] == six.text_type('completed') @@ -202,44 +328,14 @@ class Task(TaskResource): def saved(self): return self['uuid'] is not None or self['id'] is not None - def serialize_due(self, value): - return self.timestamp_serializer(value) - - def deserialize_due(self, value): - return self.timestamp_deserializer(value) - - def serialize_scheduled(self, value): - return self.timestamp_serializer(value) - - def deserialize_scheduled(self, value): - return self.timestamp_deserializer(value) - - def serialize_until(self, value): - return self.timestamp_serializer(value) - - def deserialize_until(self, value): - return self.timestamp_deserializer(value) - - def serialize_wait(self, value): - return self.timestamp_serializer(value) - - def deserialize_wait(self, value): - return self.timestamp_deserializer(value) - 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) - # Return the list of uuids - return ','.join(task['uuid'] for task in cur_dependencies) - - def deserialize_depends(self, raw_uuids): - raw_uuids = raw_uuids or '' # Convert None to empty string - uuids = raw_uuids.split(',') - return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid) + return super(Task, self).serialize_depends(cur_dependencies) def format_depends(self): # We need to generate added and removed dependencies list, @@ -249,8 +345,7 @@ class Task(TaskResource): # to keep a list of all depedencies in the _data dictionary, # not just currently added/removed ones - old_dependencies_raw = self._original_data.get('depends','') - old_dependencies = self.deserialize_depends(old_dependencies_raw) + old_dependencies = self._original_data.get('depends', set()) added = self['depends'] - old_dependencies removed = old_dependencies - self['depends'] @@ -261,17 +356,6 @@ class Task(TaskResource): ['-' + t['uuid'] for t in removed] ) - def deserialize_annotations(self, data): - return [TaskAnnotation(self, d) for d in data] if data else [] - - def deserialize_tags(self, tags): - if isinstance(tags, basestring): - return tags.split(',') if tags else [] - return tags - - def serialize_tags(self, tags): - return ','.join(tags) if tags else '' - def format_description(self): # Task version older than 2.4.0 ignores first word of the # task description if description: prefix is used @@ -314,6 +398,9 @@ class Task(TaskResource): self.refresh(only_fields=['status']) def save(self): + if self.saved and not self.modified: + return + args = [self['uuid'], 'modify'] if self.saved else ['add'] args.extend(self._get_modified_fields_as_args()) output = self.warrior.execute_command(args) @@ -331,6 +418,9 @@ class Task(TaskResource): # Circumvent the ID storage, since ID is considered read-only self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.')) + # Refreshing is very important here, as not only modification time + # is updated, but arbitrary attribute may have changed due hooks + # altering the data before saving self.refresh() def add_annotation(self, annotation): @@ -343,7 +433,7 @@ class Task(TaskResource): def remove_annotation(self, annotation): if not self.saved: - raise Task.NotSaved("Task needs to be saved to add annotation") + raise Task.NotSaved("Task needs to be saved to remove annotation") if isinstance(annotation, TaskAnnotation): annotation = annotation['description'] @@ -357,9 +447,21 @@ class Task(TaskResource): def add_field(field): # Add the output of format_field method to args list (defaults to # field:value) - format_default = lambda k: "{0}:'{1}'".format(k, self._data[k] or '') + 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), - lambda: format_default(field)) + format_default) + args.append(format_func()) # If we're modifying saved task, simply pass on all modified fields @@ -392,8 +494,22 @@ class Task(TaskResource): else: self._load_data(new_data) + def export_data(self): + """ + Exports current data contained in the Task as JSON + """ + + # We need to remove spaces for TW-1504, use custom 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(object): +class TaskFilter(SerializingObject): """ A set of parameters to filter the task list with. """ @@ -409,14 +525,23 @@ class TaskFilter(object): # Replace the value with empty string, since that is the # convention in TW for empty values - value = value if value is not None else '' + attribute_key = key.split('.')[0] + value = self._serialize(attribute_key, value) # If we are filtering by uuid:, do not use uuid keyword # due to TW-1452 bug if key == 'uuid': self.filter_params.insert(0, value) else: - self.filter_params.append('{0}:{1}'.format(key, value)) + # Surround value with aphostrophes unless it's a empty string + value = "'%s'" % value if value else '' + + # We enforce equality match by using 'is' (or 'none') modifier + # Without using this syntax, filter fails due to TW-1479 + modifier = '.is' if value else '.none' + key = key + modifier if '.' not in key else key + + self.filter_params.append("{0}:{1}".format(key, value)) def get_filter_params(self): return [f for f in self.filter_params if f] @@ -545,6 +670,7 @@ class TaskWarrior(object): self.config = { 'data.location': os.path.expanduser(data_location), 'confirmation': 'no', + 'dependency.confirmation': 'no', # See TW-1483 or taskrc man page } self.tasks = TaskQuerySet(self) self.version = self._get_version()