X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/ae7397e43578a8adcff05714ea6aa5960af13145..5c5b35a097608b63c3d54acf2f07d5cb00e85796:/tasklib/task.py?ds=inline diff --git a/tasklib/task.py b/tasklib/task.py index ca21b2b..b7bba4b 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -7,25 +7,49 @@ import os import pytz import six import sys -import subprocess import tzlocal +from backends import TaskWarrior, TaskWarriorException + 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' -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') - 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): @@ -44,8 +68,20 @@ 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 __init__(self, warrior): + self.warrior = warrior + def _deserialize(self, key, value): hydrate_func = getattr(self, 'deserialize_{0}'.format(key), lambda x: x if x != '' else None) @@ -63,6 +99,10 @@ class SerializingObject(object): 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) @@ -93,36 +133,72 @@ 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 [] @@ -149,11 +225,18 @@ class SerializingObject(object): 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(',') + raw_uuids = raw_uuids or [] # Convert None to empty list + + # TW 2.4.4 encodes list of dependencies as a single string + if type(raw_uuids) is not list: + uuids = raw_uuids.split(',') + # TW 2.4.5 and later exports them as a list, no conversion needed + else: + uuids = raw_uuids + return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid) - def normalize_datetime(self, value): + def datetime_normalizer(self, value): """ Normalizes date/datetime value (considered to come from user input) to localized datetime value. Following conversions happen: @@ -168,16 +251,36 @@ class SerializingObject(object): # 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) + 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) + and self.warrior.version >= VERSION_2_4_0): + # For strings, use 'task calc' to evaluate the string to datetime + # available since TW 2.4.0 + 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: - # 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 - + 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): @@ -190,7 +293,7 @@ class TaskResource(SerializingObject): # are not propagated. self._original_data = copy.deepcopy(self._data) - def _update_data(self, data, update_original=False): + def _update_data(self, data, update_original=False, remove_missing=False): """ Low level update of the internal _data dict. Data which are coming as updates should already be serialized. If update_original is True, the @@ -199,6 +302,11 @@ class TaskResource(SerializingObject): self._data.update(dict((key, self._deserialize(key, value)) for key, value in data.items())) + # In certain situations, we want to treat missing keys as removals + if remove_missing: + for key in set(self._data.keys()) - set(data.keys()): + self._data[key] = None + if update_original: self._original_data = copy.deepcopy(self._data) @@ -221,11 +329,8 @@ class TaskResource(SerializingObject): if key in self.read_only_fields: raise RuntimeError('Field \'%s\' is read-only' % key) - # Localize any naive date/datetime to the detected timezone - if (isinstance(value, datetime.datetime) or - isinstance(value, datetime.date)): - value = self.normalize_datetime(value) - + # Normalize the user input before saving it + value = self._normalize(key, value) self._data[key] = value def __str__(self): @@ -275,9 +380,10 @@ class TaskResource(SerializingObject): class TaskAnnotation(TaskResource): read_only_fields = ['entry', 'description'] - def __init__(self, task, data={}): + def __init__(self, task, data=None): self.task = task - self._load_data(data) + self._load_data(data or dict()) + super(TaskAnnotation, self).__init__(task.warrior) def remove(self): self.task.remove_annotation(self) @@ -311,6 +417,18 @@ class Task(TaskResource): """ pass + class ActiveTask(Exception): + """ + Raised when the operation cannot be performed on the active task. + """ + pass + + class InactiveTask(Exception): + """ + Raised when the operation cannot be performed on an inactive task. + """ + pass + class NotSaved(Exception): """ Raised when the operation cannot be performed on the task, because @@ -319,7 +437,7 @@ 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 @@ -335,25 +453,31 @@ 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())) # 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())) + task._update_data(json.loads(input_file.readline().strip()), + remove_missing=True) return task def __init__(self, warrior, **kwargs): - self.warrior = warrior + super(Task, self).__init__(warrior) # Check that user is not able to set read-only value in __init__ for key in kwargs.keys(): @@ -369,6 +493,9 @@ class Task(TaskResource): 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'] @@ -405,6 +532,10 @@ class Task(TaskResource): def pending(self): return self['status'] == six.text_type('pending') + @property + def active(self): + return self['start'] is not None + @property def saved(self): return self['uuid'] is not None or self['id'] is not None @@ -443,7 +574,7 @@ class Task(TaskResource): if self.warrior.version < VERSION_2_4_0: return self._data['description'] else: - return "description:'{0}'".format(self._data['description'] or '') + return six.u("description:'{0}'").format(self._data['description'] or '') def delete(self): if not self.saved: @@ -455,11 +586,44 @@ class Task(TaskResource): if self.deleted: raise Task.DeletedTask("Task was already deleted") - self.warrior.execute_command([self['uuid'], 'delete']) + self.backend.delete_task(self) + + # 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") + elif self.active: + raise Task.ActiveTask("Task is already active") + + self.backend.start_task(self) # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status', 'start']) + + def stop(self): + if not self.saved: + raise Task.NotSaved("Task needs to be saved before it can be stopped") + + # Refresh, and raise exception if task is already completed/deleted self.refresh(only_fields=['status']) + if not self.active: + raise Task.InactiveTask("Cannot stop an inactive task") + + self.backend.stop_task(self) + + # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status', 'start']) def done(self): if not self.saved: @@ -473,36 +637,21 @@ class Task(TaskResource): elif self.deleted: raise Task.DeletedTask("Deleted task cannot be completed") + # Older versions of TW do not stop active task at completion + if self.warrior.version < VERSION_2_4_0 and self.active: + self.stop() + 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: return - args = [self['uuid'], 'modify'] if self.saved else ['add'] - args.extend(self._get_modified_fields_as_args()) - output = self.warrior.execute_command(args) - - # Parse out the new ID, if the task is being added for the first time - if not self.saved: - id_lines = [l for l in output if l.startswith('Created task ')] - - # Complain loudly if it seems that more tasks were created - # Should not happen - if len(id_lines) != 1 or len(id_lines[0].split(' ')) != 3: - raise TaskWarriorException("Unexpected output when creating " - "task: %s" % '\n'.join(id_lines)) - - # 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() + # All the actual work is done by the backend + self.backend.save_task(self) def add_annotation(self, annotation): if not self.saved: @@ -535,9 +684,9 @@ class Task(TaskResource): if serialized_value is '': escaped_serialized_value = '' else: - escaped_serialized_value = "'{0}'".format(serialized_value) + escaped_serialized_value = six.u("'{0}'").format(serialized_value) - format_default = lambda: "{0}:{1}".format(field, + format_default = lambda: six.u("{0}:{1}").format(field, escaped_serialized_value) format_func = getattr(self, 'format_{0}'.format(field), @@ -558,7 +707,7 @@ class Task(TaskResource): return args - def refresh(self, only_fields=[]): + def refresh(self, only_fields=None, after_save=False): # Raise error when trying to refresh a task that has not been saved if not self.saved: raise Task.NotSaved("Task needs to be saved to be refreshed") @@ -567,7 +716,39 @@ class Task(TaskResource): # of newly saved tasks. Any other place in the code is fine # with using UUID only. args = [self['uuid'] or self['id'], 'export'] - new_data = json.loads(self.warrior.execute_command(args)[0]) + output = self.warrior.execute_command(args) + + def valid(output): + return len(output) == 1 and output[0].startswith('{') + + # For older TW versions attempt to uniquely locate the task + # using the data we have if it has been just saved. + # This can happen when adding a completed task on older TW versions. + if (not valid(output) and self.warrior.version < VERSION_2_4_5 + and after_save): + + # Make a copy, removing ID and UUID. It's most likely invalid + # (ID 0) if it failed to match a unique task. + data = copy.deepcopy(self._data) + data.pop('id', None) + data.pop('uuid', None) + + taskfilter = TaskFilter(self.warrior) + for key, value in data.items(): + taskfilter.add_filter_param(key, value) + + output = self.warrior.execute_command(['export', '--'] + + taskfilter.get_filter_params()) + + # If more than 1 task has been matched still, raise an exception + if not valid(output): + raise TaskWarriorException( + "Unique identifiers {0} with description: {1} matches " + "multiple tasks: {2}".format( + self['uuid'] or self['id'], self['description'], output) + ) + + new_data = json.loads(output[0]) if only_fields: to_update = dict( [(k, new_data.get(k)) for k in only_fields]) @@ -580,8 +761,9 @@ class TaskFilter(SerializingObject): A set of parameters to filter the task list with. """ - def __init__(self, filter_params=[]): - self.filter_params = filter_params + def __init__(self, warrior, filter_params=None): + self.filter_params = filter_params or [] + super(TaskFilter, self).__init__(warrior) def add_filter(self, filter_str): self.filter_params.append(filter_str) @@ -593,12 +775,8 @@ class TaskFilter(SerializingObject): # 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) - + # 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 @@ -611,16 +789,18 @@ class TaskFilter(SerializingObject): # 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 + # which is, however, fixed in 2.4.5 + if self.warrior.version < VERSION_2_4_5: + modifier = '.is' if value else '.none' + key = key + modifier if '.' not in key else key - self.filter_params.append("{0}:{1}".format(key, value)) + self.filter_params.append(six.u("{0}:{1}").format(key, value)) def get_filter_params(self): return [f for f in self.filter_params if f] def clone(self): - c = self.__class__() + c = self.__class__(self.warrior) c.filter_params = list(self.filter_params) return c @@ -633,7 +813,7 @@ class TaskQuerySet(object): def __init__(self, warrior=None, filter_obj=None): self.warrior = warrior self._result_cache = None - self.filter_obj = filter_obj or TaskFilter() + self.filter_obj = filter_obj or TaskFilter(warrior) def __deepcopy__(self, memo): """ @@ -733,73 +913,3 @@ class TaskQuerySet(object): raise ValueError( 'get() returned more than one Task -- it returned {0}! ' 'Lookup parameters were {1}'.format(num, kwargs)) - - -class TaskWarrior(object): - def __init__(self, data_location='~/.task', create=True): - data_location = os.path.expanduser(data_location) - if create and not os.path.exists(data_location): - os.makedirs(data_location) - self.config = { - 'data.location': os.path.expanduser(data_location), - 'confirmation': 'no', - '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:/'] - config = self.config.copy() - config.update(config_override) - for item in config.items(): - command_args.append('rc.{0}={1}'.format(*item)) - command_args.extend(map(str, args)) - return command_args - - def _get_version(self): - p = subprocess.Popen( - ['task', '--version'], - stdout=subprocess.PIPE, - stderr=subprocess.PIPE) - stdout, stderr = [x.decode('utf-8') for x in p.communicate()] - return stdout.strip('\n') - - def execute_command(self, args, config_override={}): - 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 stderr.strip(): - error_msg = stderr.strip().splitlines()[-1] - else: - error_msg = stdout.strip() - raise TaskWarriorException(error_msg) - return stdout.strip().split('\n') - - def filter_tasks(self, filter_obj): - args = ['export', '--'] + filter_obj.get_filter_params() - tasks = [] - for line in self.execute_command(args): - if line: - data = line.strip(',') - try: - filtered_task = Task(self) - filtered_task._load_data(json.loads(data)) - tasks.append(filtered_task) - except ValueError: - raise TaskWarriorException('Invalid JSON: %s' % data) - return tasks - - def merge_with(self, path, push=False): - path = path.rstrip('/') + '/' - self.execute_command(['merge', path], config_override={ - 'merge.autopush': 'yes' if push else 'no', - }) - - def undo(self): - self.execute_command(['undo'])