X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/783136a06befdb7fa07865d4ddd6a459d49d1049..919f61adb63e967d458122b6685f678a5fa0249f:/tasklib/task.py?ds=inline diff --git a/tasklib/task.py b/tasklib/task.py index 9b3626d..ad27a92 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -4,11 +4,14 @@ 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' +DATE_FORMAT_CALC = '%Y-%m-%dT%H:%M:%S' REPR_OUTPUT_SIZE = 10 PENDING = 'pending' COMPLETED = 'completed' @@ -17,14 +20,48 @@ VERSION_2_1_0 = six.u('2.1.0') VERSION_2_2_0 = six.u('2.2.0') VERSION_2_3_0 = six.u('2.3.0') VERSION_2_4_0 = six.u('2.4.0') +VERSION_2_4_1 = six.u('2.4.1') +VERSION_2_4_2 = six.u('2.4.2') logger = logging.getLogger(__name__) +local_zone = tzlocal.get_localzone() class TaskWarriorException(Exception): pass +class ReadOnlyDictView(object): + """ + Provides simplified read-only view upon dict object. + """ + + def __init__(self, viewed_dict): + self.viewed_dict = viewed_dict + + def __getitem__(self, key): + return copy.deepcopy(self.viewed_dict.__getitem__(key)) + + def __contains__(self, k): + return self.viewed_dict.__contains__(k) + + def __iter__(self): + for value in self.viewed_dict: + yield copy.deepcopy(value) + + def __len__(self): + return len(self.viewed_dict) + + def get(self, key, default=None): + return copy.deepcopy(self.viewed_dict.get(key, default)) + + def items(self): + return [copy.deepcopy(v) for v in self.viewed_dict.items()] + + def values(self): + return [copy.deepcopy(v) for v in self.viewed_dict.values()] + + class SerializingObject(object): """ Common ancestor for TaskResource & TaskFilter, since they both @@ -41,6 +78,15 @@ class SerializingObject(object): 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. + + Normalizing methods should hold the following contract: + - They are used to validate and normalize the user input. + Any attribute value that comes from the user (during Task + initialization, assignign values to Task attributes, or + filtering by user-provided values of attributes) is first + validated and normalized using the normalize_{key} method. + - If validation or normalization fails, normalizer is expected + to raise ValueError. """ def _deserialize(self, key, value): @@ -53,15 +99,40 @@ 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. + """ + + # None value should not be converted by normalizer + if value is None: + return None + + normalize_func = getattr(self, 'normalize_{0}'.format(key), + lambda x: x) + + return normalize_func(value) + def timestamp_serializer(self, date): if not date: 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) @@ -69,36 +140,81 @@ class SerializingObject(object): def deserialize_entry(self, value): return self.timestamp_deserializer(value) + def normalize_entry(self, value): + return self.datetime_normalizer(value) + def serialize_modified(self, value): return self.timestamp_serializer(value) def deserialize_modified(self, value): return self.timestamp_deserializer(value) + def normalize_modified(self, value): + return self.datetime_normalizer(value) + + def serialize_start(self, value): + return self.timestamp_serializer(value) + + def deserialize_start(self, value): + return self.timestamp_deserializer(value) + + def normalize_start(self, value): + return self.datetime_normalizer(value) + + def serialize_end(self, value): + return self.timestamp_serializer(value) + + def deserialize_end(self, value): + return self.timestamp_deserializer(value) + + def normalize_end(self, value): + return self.datetime_normalizer(value) + def serialize_due(self, value): return self.timestamp_serializer(value) def deserialize_due(self, value): return self.timestamp_deserializer(value) + def normalize_due(self, value): + return self.datetime_normalizer(value) + def serialize_scheduled(self, value): return self.timestamp_serializer(value) def deserialize_scheduled(self, value): return self.timestamp_deserializer(value) + def normalize_scheduled(self, value): + return self.datetime_normalizer(value) + def serialize_until(self, value): return self.timestamp_serializer(value) def deserialize_until(self, value): return self.timestamp_deserializer(value) + def normalize_until(self, value): + return self.datetime_normalizer(value) + def serialize_wait(self, value): return self.timestamp_serializer(value) def deserialize_wait(self, value): return self.timestamp_deserializer(value) + def normalize_wait(self, value): + return self.datetime_normalizer(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 [] @@ -120,6 +236,50 @@ class SerializingObject(object): uuids = raw_uuids.split(',') return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid) + def datetime_normalizer(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): + if 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 + elif isinstance(value, six.string_types): + # For strings, use 'task calc' to evaluate the string to datetime + args = value.split() + result = self.warrior.execute_command(['calc'] + args) + naive = datetime.datetime.strptime(result[0], DATE_FORMAT_CALC) + localized = local_zone.localize(naive) + else: + raise ValueError("Provided value could not be converted to " + "datetime, its type is not supported: {}" + .format(type(value))) + + return localized + + def normalize_uuid(self, value): + # Enforce sane UUID + if not isinstance(value, six.string_types) or value == '': + raise ValueError("UUID must be a valid non-empty string, " + "not: {}".format(value)) + + return value + class TaskResource(SerializingObject): read_only_fields = [] @@ -161,6 +321,9 @@ class TaskResource(SerializingObject): def __setitem__(self, key, value): if key in self.read_only_fields: raise RuntimeError('Field \'%s\' is read-only' % key) + + # Normalize the user input before saving it + value = self._normalize(key, value) self._data[key] = value def __str__(self): @@ -172,6 +335,40 @@ 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'] @@ -220,7 +417,7 @@ class Task(TaskResource): pass @classmethod - def from_input(cls, input_file=sys.stdin, modify=None): + def from_input(cls, input_file=sys.stdin, modify=None, warrior=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 @@ -236,13 +433,18 @@ class Task(TaskResource): 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 + # Create the TaskWarrior instance if none passed + if warrior is None: + hook_parent_dir = os.path.dirname(os.path.dirname(sys.argv[0])) + warrior = TaskWarrior(data_location=hook_parent_dir) + + # TaskWarrior instance is set to None + task = cls(warrior) + # Load the data from the input task._load_data(json.loads(input_file.readline().strip())) @@ -266,8 +468,12 @@ 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) + + # Provide read only access to the original data + self.original = ReadOnlyDictView(self._original_data) def __unicode__(self): return self['description'] @@ -289,25 +495,6 @@ 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: - 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') @@ -377,8 +564,24 @@ class Task(TaskResource): self.warrior.execute_command([self['uuid'], 'delete']) # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status', 'start', 'end']) + + def start(self): + if not self.saved: + raise Task.NotSaved("Task needs to be saved before it can be started") + + # Refresh, and raise exception if task is already completed/deleted self.refresh(only_fields=['status']) + if self.completed: + raise Task.CompletedTask("Cannot start a completed task") + elif self.deleted: + raise Task.DeletedTask("Deleted task cannot be started") + + self.warrior.execute_command([self['uuid'], 'start']) + + # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status', 'start']) def done(self): if not self.saved: @@ -395,7 +598,7 @@ class Task(TaskResource): self.warrior.execute_command([self['uuid'], 'done']) # Refresh the status again, so that we have updated info stored - self.refresh(only_fields=['status']) + self.refresh(only_fields=['status', 'start', 'end']) def save(self): if self.saved and not self.modified: @@ -494,21 +697,6 @@ 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(SerializingObject): """ A set of parameters to filter the task list with. @@ -526,6 +714,9 @@ 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 before we serialize + value = self._normalize(attribute_key, value) value = self._serialize(attribute_key, value) # If we are filtering by uuid:, do not use uuid keyword @@ -663,20 +854,29 @@ class TaskQuerySet(object): class TaskWarrior(object): - def __init__(self, data_location='~/.task', create=True): + def __init__(self, data_location='~/.task', create=True, taskrc_location='~/.taskrc'): data_location = os.path.expanduser(data_location) + self.taskrc_location = os.path.expanduser(taskrc_location) + + # If taskrc does not exist, pass / to use defaults and avoid creating + # dummy .taskrc file by TaskWarrior + if not os.path.exists(self.taskrc_location): + self.taskrc_location = '/' + if create and not os.path.exists(data_location): os.makedirs(data_location) + self.config = { - 'data.location': os.path.expanduser(data_location), + 'data.location': 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() def _get_command_args(self, args, config_override={}): - command_args = ['task', 'rc:/'] + command_args = ['task', 'rc:{0}'.format(self.taskrc_location)] config = self.config.copy() config.update(config_override) for item in config.items(): @@ -692,22 +892,31 @@ class TaskWarrior(object): stdout, stderr = [x.decode('utf-8') for x in p.communicate()] return stdout.strip('\n') - def execute_command(self, args, config_override={}): + def execute_command(self, args, config_override={}, allow_failure=True): command_args = self._get_command_args( args, config_override=config_override) logger.debug(' '.join(command_args)) p = subprocess.Popen(command_args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = [x.decode('utf-8') for x in p.communicate()] - if p.returncode: + if p.returncode and allow_failure: if stderr.strip(): - error_msg = stderr.strip().splitlines()[-1] + error_msg = stderr.strip() else: error_msg = stdout.strip() raise TaskWarriorException(error_msg) return stdout.strip().split('\n') + def enforce_recurrence(self): + # Run arbitrary report command which will trigger generation + # of recurrent tasks. + + # Only necessary for TW up to 2.4.1, fixed in 2.4.2. + if self.version < VERSION_2_4_2: + self.execute_command(['next'], allow_failure=False) + def filter_tasks(self, filter_obj): + self.enforce_recurrence() args = ['export', '--'] + filter_obj.get_filter_params() tasks = [] for line in self.execute_command(args):