X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/03fa1e8ebe90cc8d6cda283b3498f2fe691fe5b9..3a9e4aebe4359123804b6e5bca8c5678546b688e:/tasklib/task.py diff --git a/tasklib/task.py b/tasklib/task.py index 491a374..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' @@ -12,6 +13,11 @@ 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__) @@ -19,24 +25,143 @@ 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. + self._original_data = copy.deepcopy(self._data) + + def _update_data(self, data, update_original=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 + original_data dict is updated as well. + """ + self._data.update(dict((key, self._deserialize(key, value)) + for key, value in data.items())) + + if update_original: + self._original_data = copy.deepcopy(self._data) + def __getitem__(self, key): - hydrate_func = getattr(self, 'deserialize_{0}'.format(key), - lambda x: x) - return hydrate_func(self._data.get(key)) + # This is a workaround to make TaskResource non-iterable + # over simple index-based iteration + try: + int(key) + raise StopIteration + except ValueError: + pass + + 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) - dehydrate_func = getattr(self, 'serialize_{0}'.format(key), - lambda x: x) - self._data[key] = dehydrate_func(value) - self._modified_fields.add(key) + self._data[key] = value def __str__(self): s = six.text_type(self.__unicode__()) @@ -55,98 +180,336 @@ class TaskAnnotation(TaskResource): self.task = task self._load_data(data) - def deserialize_entry(self, data): - return datetime.datetime.strptime(data, DATE_FORMAT) if data else None - - def serialize_entry(self, date): - return date.strftime(DATE_FORMAT) if date else '' - def remove(self): self.task.remove_annotation(self) 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__ class Task(TaskResource): - read_only_fields = ['id', 'entry', 'urgency'] + read_only_fields = ['id', 'entry', 'urgency', 'uuid', 'modified'] class DoesNotExist(Exception): pass - def __init__(self, warrior, data={}): + class CompletedTask(Exception): + """ + Raised when the operation cannot be performed on the completed task. + """ + pass + + class DeletedTask(Exception): + """ + Raised when the operation cannot be performed on the deleted task. + """ + pass + + class NotSaved(Exception): + """ + Raised when the operation cannot be performed on the task, because + it has not been saved to TaskWarrior yet. + """ + 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 - self._load_data(data) - self._modified_fields = set() + + # Check that user is not able to set read-only value in __init__ + for key in kwargs.keys(): + if key in self.read_only_fields: + raise RuntimeError('Field \'%s\' is read-only' % key) + + # We serialize the data in kwargs so that users of the library + # do not have to pass different data formats via __setitem__ and + # __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))) def __unicode__(self): return self['description'] - def serialize_due(self, date): - return date.strftime(DATE_FORMAT) + def __eq__(self, other): + if self['uuid'] and other['uuid']: + # For saved Tasks, just define equality by equality of uuids + return self['uuid'] == other['uuid'] + else: + # If the tasks are not saved, compare the actual instances + return id(self) == id(other) - def deserialize_due(self, date_str): - if not date_str: - return None - return datetime.datetime.strptime(date_str, DATE_FORMAT) - def deserialize_annotations(self, data): - return [TaskAnnotation(self, d) for d in data] if data else [] + def __hash__(self): + if self['uuid']: + # For saved Tasks, just define equality by equality of uuids + return self['uuid'].__hash__() + else: + # If the tasks are not saved, return hash of instance id + return id(self).__hash__() - def deserialize_tags(self, tags): - if isinstance(tags, basestring): - return tags.split(',') if tags else [] - return tags + @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) - def serialize_tags(self, tags): - return ','.join(tags) if tags else '' + # 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') + + @property + def deleted(self): + return self['status'] == six.text_type('deleted') + + @property + def waiting(self): + return self['status'] == six.text_type('waiting') + + @property + def pending(self): + return self['status'] == six.text_type('pending') + + @property + def saved(self): + return self['uuid'] is not None or self['id'] is not None + + def serialize_depends(self, cur_dependencies): + # Check that all the tasks are saved + 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 super(Task, self).serialize_depends(cur_dependencies) + + def format_depends(self): + # We need to generate added and removed dependencies list, + # since Taskwarrior does not accept redefining dependencies. + + # This cannot be part of serialize_depends, since we need + # to keep a list of all depedencies in the _data dictionary, + # not just currently added/removed ones + + old_dependencies = self._original_data.get('depends', set()) + + added = self['depends'] - old_dependencies + removed = old_dependencies - self['depends'] + + # Removed dependencies need to be prefixed with '-' + return 'depends:' + ','.join( + [t['uuid'] for t in added] + + ['-' + t['uuid'] for t in removed] + ) + + def format_description(self): + # Task version older than 2.4.0 ignores first word of the + # task description if description: prefix is used + if self.warrior.version < VERSION_2_4_0: + return self._data['description'] + else: + return "description:'{0}'".format(self._data['description'] or '') def delete(self): - self.warrior.execute_command([self['id'], 'delete'], config_override={ - 'confirmation': 'no', - }) + if not self.saved: + raise Task.NotSaved("Task needs to be saved before it can be deleted") + + # Refresh the status, and raise exception if the task is deleted + self.refresh(only_fields=['status']) + + if self.deleted: + raise Task.DeletedTask("Task was already deleted") + + self.warrior.execute_command([self['uuid'], 'delete']) + + # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status']) + def done(self): - self.warrior.execute_command([self['id'], 'done']) + if not self.saved: + raise Task.NotSaved("Task needs to be saved before it can be completed") + + # Refresh, and raise exception if task is already completed/deleted + self.refresh(only_fields=['status']) + + if self.completed: + raise Task.CompletedTask("Cannot complete a completed task") + elif self.deleted: + raise Task.DeletedTask("Deleted task cannot be completed") + + self.warrior.execute_command([self['uuid'], 'done']) + + # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status']) def save(self): - args = [self['id'], 'modify'] if self['id'] else ['add'] + 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()) - self.warrior.execute_command(args) - self._modified_fields.clear() + 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() def add_annotation(self, annotation): - args = [self['id'], 'annotate', annotation] + if not self.saved: + raise Task.NotSaved("Task needs to be saved to add annotation") + + args = [self['uuid'], 'annotate', annotation] self.warrior.execute_command(args) self.refresh(only_fields=['annotations']) def remove_annotation(self, annotation): + if not self.saved: + raise Task.NotSaved("Task needs to be saved to remove annotation") + if isinstance(annotation, TaskAnnotation): annotation = annotation['description'] - args = [self['id'], 'denotate', annotation] + args = [self['uuid'], 'denotate', annotation] self.warrior.execute_command(args) self.refresh(only_fields=['annotations']) def _get_modified_fields_as_args(self): args = [] - for field in self._modified_fields: - args.append('{}:{}'.format(field, self._data[field])) + + 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]) + + # 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 + if self.saved: + for field in self._modified_fields: + add_field(field) + # For new tasks, pass all fields that make sense + else: + for field in self._data.keys(): + if field in self.read_only_fields: + continue + add_field(field) + return args def refresh(self, only_fields=[]): - args = [self['uuid'], 'export'] + # 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") + + # We need to use ID as backup for uuid here for the refreshes + # 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]) if only_fields: to_update = dict( [(k, new_data.get(k)) for k in only_fields]) - self._data.update(to_update) + self._update_data(to_update, update_original=True) else: - self._data = new_data + 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. """ @@ -162,8 +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 '' - self.filter_params.append('{0}:{1}'.format(key, value)) + 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: + # 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] @@ -291,8 +669,11 @@ class TaskWarrior(object): 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 } self.tasks = TaskQuerySet(self) + self.version = self._get_version() def _get_command_args(self, args, config_override={}): command_args = ['task', 'rc:/'] @@ -303,6 +684,14 @@ class TaskWarrior(object): 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) @@ -325,7 +714,9 @@ class TaskWarrior(object): if line: data = line.strip(',') try: - tasks.append(Task(self, json.loads(data))) + 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 @@ -337,6 +728,4 @@ class TaskWarrior(object): }) def undo(self): - self.execute_command(['undo'], config_override={ - 'confirmation': 'no', - }) + self.execute_command(['undo'])