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
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 TaskResource(object):
+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
+ 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.
+
+ 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):
+ 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 _normalize(self, key, value):
+ """
+ Use normalize_<key> 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 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)
+
+ 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_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 []
+
+ 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)
+
+ 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) 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
+
+ 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 = []
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)
+
+ # Normalize the user input before saving it
+ value = self._normalize(key, value)
+ self._data[key] = value
def __str__(self):
s = six.text_type(self.__unicode__())
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']
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', 'uuid']
+ read_only_fields = ['id', 'entry', 'urgency', 'uuid', 'modified']
class DoesNotExist(Exception):
pass
"""
pass
- def __init__(self, warrior, data={}):
+ 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, 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
+ 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.
+ """
+
+ # 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()))
+
+ 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._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']
+ 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 __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__()
+
@property
def completed(self):
return self['status'] == six.text_type('completed')
def saved(self):
return self['uuid'] is not None or self['id'] is not None
- def serialize_due(self, date):
- return date.strftime(DATE_FORMAT)
+ 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)
- def deserialize_due(self, date_str):
- if not date_str:
- return None
- return datetime.datetime.strptime(date_str, DATE_FORMAT)
+ return super(Task, self).serialize_depends(cur_dependencies)
- def deserialize_annotations(self, data):
- return [TaskAnnotation(self, d) for d in data] if data else []
+ def format_depends(self):
+ # We need to generate added and removed dependencies list,
+ # since Taskwarrior does not accept redefining dependencies.
- def deserialize_tags(self, tags):
- if isinstance(tags, basestring):
- return tags.split(',') if tags else []
- return tags
+ # 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
- def serialize_tags(self, tags):
- return ','.join(tags) if tags else ''
+ 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):
+ 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 self.DeletedTask("Task was already deleted")
+ raise Task.DeletedTask("Task was already deleted")
- self.warrior.execute_command([self['uuid'], 'delete'], config_override={
- 'confirmation': 'no',
- })
+ 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):
+ 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 self.CompletedTask("Cannot complete a completed task")
+ raise Task.CompletedTask("Cannot complete a completed task")
elif self.deleted:
- raise self.DeletedTask("Deleted task cannot be completed")
+ raise Task.DeletedTask("Deleted task cannot be completed")
self.warrior.execute_command([self['uuid'], 'done'])
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)
# Circumvent the ID storage, since ID is considered read-only
self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.'))
- self._modified_fields.clear()
+ # 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):
+ 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)
- # TODO: This will not work with the tasks that are not yet saved
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['uuid'], 'denotate', annotation]
self.warrior.execute_command(args)
- # TODO: This will not work with the tasks that are not yet saved
self.refresh(only_fields=['annotations'])
def _get_modified_fields_as_args(self):
args = []
+ 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:
- args.append('{0}:{1}'.format(field, self._data[field]))
+ 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
- args.append('{0}:{1}'.format(field, self._data[field]))
+ add_field(field)
return args
def refresh(self, only_fields=[]):
- # Do not refresh for tasks that are not yet saved in the TW
+ # Raise error when trying to refresh a task that has not been saved
if not self.saved:
- return
+ 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
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)
-
-class TaskFilter(object):
+class TaskFilter(SerializingObject):
"""
A set of parameters to filter the task list with.
"""
# 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]
+
+ # Since this is user input, we need to normalize before we serialize
+ value = self._normalize(key, value)
+ 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]
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:/']
command_args.extend(map(str, args))
return command_args
- def execute_command(self, args, config_override={}):
+ 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={}, 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]
else:
raise TaskWarriorException(error_msg)
return stdout.strip().split('\n')
+ def enforce_recurrence(self):
+ # Run arbitrary report command which will trigger generation
+ # of recurrent tasks.
+ # TODO: Make a version dependant enforcement once
+ # TW-1531 is handled
+ 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):
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
})
def undo(self):
- self.execute_command(['undo'], config_override={
- 'confirmation': 'no',
- })
+ self.execute_command(['undo'])
projects / etc / taskwarrior.git / blobdiff