X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/11ffa3d5433c690448add06638f96c42fff262de..11b50d11a86a461740d217dbebb896d119c955bc:/tasklib/task.py?ds=inline diff --git a/tasklib/task.py b/tasklib/task.py index b6c3d09..ca21b2b 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -4,8 +4,11 @@ import datetime import json import logging import os +import pytz import six +import sys import subprocess +import tzlocal DATE_FORMAT = '%Y%m%dT%H%M%SZ' REPR_OUTPUT_SIZE = 10 @@ -18,6 +21,7 @@ VERSION_2_3_0 = six.u('2.3.0') VERSION_2_4_0 = six.u('2.4.0') logger = logging.getLogger(__name__) +local_zone = tzlocal.get_localzone() class TaskWarriorException(Exception): @@ -28,6 +32,18 @@ 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): @@ -40,15 +56,36 @@ class SerializingObject(object): lambda x: x if x is not None else '') return dehydrate_func(value) + def _normalize(self, key, value): + """ + Use normalize_ methods to normalize user input. Any user + input will be normalized at the moment it is used as filter, + or entered as a value of Task attribute. + """ + + normalize_func = getattr(self, 'normalize_{0}'.format(key), + lambda x: x) + + return normalize_func(value) + def timestamp_serializer(self, date): if not date: - return None + return '' + + # Any serialized timestamp should be localized, we need to + # convert to UTC before converting to string (DATE_FORMAT uses UTC) + date = date.astimezone(pytz.utc) + 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) + + # Return timestamp localized in the local zone + naive_timestamp = datetime.datetime.strptime(date_str, DATE_FORMAT) + localized_timestamp = pytz.utc.localize(naive_timestamp) + return localized_timestamp.astimezone(local_zone) def serialize_entry(self, value): return self.timestamp_serializer(value) @@ -86,6 +123,15 @@ class SerializingObject(object): def deserialize_wait(self, value): return self.timestamp_deserializer(value) + def serialize_annotations(self, value): + value = value if value is not None else [] + + # This may seem weird, but it's correct, we want to export + # a list of dicts as serialized value + serialized_annotations = [json.loads(annotation.export_data()) + for annotation in value] + return serialized_annotations if serialized_annotations else '' + def deserialize_annotations(self, data): return [TaskAnnotation(self, d) for d in data] if data else [] @@ -93,29 +139,56 @@ class SerializingObject(object): return ','.join(tags) if tags else '' def deserialize_tags(self, tags): - if isinstance(tags, basestring): + if isinstance(tags, six.string_types): return tags.split(',') if tags else [] - return tags + 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 uuids = raw_uuids.split(',') return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid) + def normalize_datetime(self, value): + """ + Normalizes date/datetime value (considered to come from user input) + to localized datetime value. Following conversions happen: + + naive date -> localized datetime with the same date, and time=midnight + naive datetime -> localized datetime with the same value + localized datetime -> localized datetime (no conversion) + """ + + if (isinstance(value, datetime.date) + and not isinstance(value, datetime.datetime)): + # Convert to local midnight + value_full = datetime.datetime.combine(value, datetime.time.min) + localized = local_zone.localize(value_full) + elif isinstance(value, datetime.datetime) and value.tzinfo is None: + # Convert to localized datetime object + localized = local_zone.localize(value) + else: + # If the value is already localized, there is no need to change + # time zone at this point. Also None is a valid value too. + localized = value + + return localized + + 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): """ @@ -123,11 +196,12 @@ class TaskResource(SerializingObject): 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 @@ -138,12 +212,21 @@ class TaskResource(SerializingObject): 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) + + # Localize any naive date/datetime to the detected timezone + if (isinstance(value, datetime.datetime) or + isinstance(value, datetime.date)): + value = self.normalize_datetime(value) + + self._data[key] = value def __str__(self): s = six.text_type(self.__unicode__()) @@ -154,6 +237,40 @@ class TaskResource(SerializingObject): def __repr__(self): return str(self) + 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=(',',':')) + + @property + def _modified_fields(self): + writable_fields = set(self._data.keys()) - set(self.read_only_fields) + for key in writable_fields: + 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)) + class TaskAnnotation(TaskResource): read_only_fields = ['entry', 'description'] @@ -168,6 +285,11 @@ 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__ @@ -196,6 +318,40 @@ 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 @@ -209,8 +365,9 @@ class Task(TaskResource): # __init__ methods, that would be confusing # Rather unfortunate syntax due to python2.6 comaptiblity - self._load_data(dict((key, self._serialize(key, value)) - for (key, value) in six.iteritems(kwargs))) + self._data = dict((key, self._normalize(key, value)) + for (key, value) in six.iteritems(kwargs)) + self._original_data = copy.deepcopy(self._data) def __unicode__(self): return self['description'] @@ -232,13 +389,6 @@ class Task(TaskResource): # If the tasks are not saved, return hash of instance id return id(self).__hash__() - @property - 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): - yield key - @property def completed(self): return self['status'] == six.text_type('completed') @@ -261,7 +411,7 @@ 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) @@ -276,8 +426,7 @@ 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'] @@ -330,6 +479,9 @@ 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) @@ -347,6 +499,9 @@ 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): @@ -372,13 +527,22 @@ 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, - "'{0}'".format(self._data[k]) - if self._data[k] is not None - else '') + # field:value) + 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 @@ -411,7 +575,6 @@ class Task(TaskResource): else: self._load_data(new_data) - class TaskFilter(SerializingObject): """ A set of parameters to filter the task list with. @@ -429,6 +592,13 @@ class TaskFilter(SerializingObject): # Replace the value with empty string, since that is the # convention in TW for empty values attribute_key = key.split('.')[0] + + # Since this is user input, we need to normalize datetime + # objects + if (isinstance(value, datetime.datetime) or + isinstance(value, datetime.date)): + value = self.normalize_datetime(value) + value = self._serialize(attribute_key, value) # If we are filtering by uuid:, do not use uuid keyword @@ -573,7 +743,8 @@ class TaskWarrior(object): self.config = { 'data.location': os.path.expanduser(data_location), 'confirmation': 'no', - 'dependency.confirmation': 'no', # See TW-1483 or taskrc man page + 'dependency.confirmation': 'no', # See TW-1483 or taskrc man page + 'recurrence.confirmation': 'no', # Necessary for modifying R tasks } self.tasks = TaskQuerySet(self) self.version = self._get_version()