+from __future__ import print_function
import copy
-import datetime
+import importlib
import json
import logging
import os
-import subprocess
+import six
+import sys
+
+from .serializing import SerializingObject
DATE_FORMAT = '%Y%m%dT%H%M%SZ'
REPR_OUTPUT_SIZE = 10
logger = logging.getLogger(__name__)
-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 __unicode__(self):
+ return six.u('ReadOnlyDictView: {0}'.format(repr(self.viewed_dict)))
+
+ __repr__ = __unicode__
+
+ 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 TaskResource(SerializingObject):
+ read_only_fields = []
+
+ def _load_data(self, 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, 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
+ original_data dict is updated as well.
+ """
+ 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)
+
+ def __getitem__(self, 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)
+
+ # 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__())
+ if not six.PY3:
+ s = s.encode('utf-8')
+ return s
+
+ 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']
+
+ def __init__(self, task, data=None):
+ self.task = task
+ self._load_data(data or dict())
+ super(TaskAnnotation, self).__init__(task.backend)
+
+ 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 LazyUUIDTask(object):
+ """
+ A lazy wrapper around Task object, referenced by UUID.
+
+ - Supports comparison with LazyUUIDTask or Task objects (equality by UUIDs)
+ - If any attribute other than 'uuid' requested, a lookup in the
+ backend will be performed and this object will be replaced by a proper
+ Task object.
+ """
+
+ def __init__(self, tw, uuid):
+ self._tw = tw
+ self._uuid = uuid
+
+ def __getitem__(self, key):
+ # LazyUUIDTask does not provide anything else other than 'uuid'
+ if key is 'uuid':
+ return self._uuid
+ else:
+ self.replace()
+ return self[key]
+
+ def __getattr__(self, name):
+ # Getattr is called only if the attribute could not be found using
+ # normal means
+ self.replace()
+ return self.name
+
+ def __eq__(self, other):
+ if other['uuid']:
+ # For saved Tasks, just define equality by equality of uuids
+ return self['uuid'] == other['uuid']
+
+ def __hash__(self):
+ return self['uuid'].__hash__()
+
+ def replace(self):
+ """
+ Performs conversion to the regular Task object, referenced by the
+ stored UUID.
+ """
+
+ replacement = self._tw.tasks.get(uuid=self._uuid)
+ self.__class__ = replacement.__class__
+ self.__dict__ = replacement.__dict__
+
+
+class LazyUUIDTaskSet(object):
+ """
+ A lazy wrapper around TaskQuerySet object, for tasks referenced by UUID.
+
+ - Supports 'in' operator with LazyUUIDTask or Task objects
+ - If iteration over the objects in the LazyUUIDTaskSet is requested, the
+ LazyUUIDTaskSet will be converted to QuerySet and evaluated
+ """
+
+ def __init__(self, tw, uuids):
+ self._tw = tw
+ self._uuids = set(uuids)
+
+ def __getattr__(self, name):
+ # Getattr is called only if the attribute could not be found using
+ # normal means
+ self.replace()
+ return self.name
+
+ def __eq__(self, other):
+ return set(t['uuid'] for t in other) == self._uuids
+
+ def __contains__(self, task):
+ return task['uuid'] in self._uuids
+
+ def __len__(self):
+ return len(self._uuids)
+
+ def __iter__(self):
+ self.replace()
+ for task in self:
+ yield task
+
+ def replace(self):
+ """
+ Performs conversion to the regular TaskQuerySet object, referenced by
+ the stored UUIDs.
+ """
+
+ replacement = self._tw.tasks.filter(' '.join(self._uuids))
+ self.__class__ = replacement.__class__
+ self.__dict__ = replacement.__dict__
-class Task(object):
+class Task(TaskResource):
+ read_only_fields = ['id', 'entry', 'urgency', 'uuid', 'modified']
class DoesNotExist(Exception):
pass
- def __init__(self, warrior, data={}):
- self.warrior = warrior
- self._data = data
- self._modified_fields = set()
+ 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 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
+ it has not been saved to TaskWarrior yet.
+ """
+ pass
+
+ @classmethod
+ def from_input(cls, input_file=sys.stdin, modify=None, backend=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 backend is None:
+ backends = importlib.import_module('tasklib.backends')
+ hook_parent_dir = os.path.dirname(os.path.dirname(sys.argv[0]))
+ backend = backends.TaskWarrior(data_location=hook_parent_dir)
+
+ # TaskWarrior instance is set to None
+ task = cls(backend)
+
+ # 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()),
+ remove_missing=True)
+
+ return task
+
+ def __init__(self, backend, **kwargs):
+ super(Task, self).__init__(backend)
+
+ # 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 __getitem__(self, key):
- hydrate_func = getattr(self, 'deserialize_{0}'.format(key),
- lambda x: x)
- return hydrate_func(self._data.get(key))
+ 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 __setitem__(self, key, value):
- dehydrate_func = getattr(self, 'serialize_{0}'.format(key),
- lambda x: x)
- self._data[key] = dehydrate_func(value)
- self._modified_fields.add(key)
-
- def serialize_due(self, date):
- return date.strftime(DATE_FORMAT)
-
- def deserialize_due(self, date_str):
- if not date_str:
- return None
- return datetime.datetime.strptime(date_str, DATE_FORMAT)
-
- def serialize_annotations(self, annotations):
- ann_list = list(annotations)
- for ann in ann_list:
- ann['entry'] = ann['entry'].strftime(DATE_FORMAT)
- return ann_list
-
- def deserialize_annotations(self, annotations):
- ann_list = list(annotations)
- for ann in ann_list:
- ann['entry'] = datetime.datetime.strptime(
- ann['entry'], DATE_FORMAT)
- return ann_list
-
- def deserialize_tags(self, tags):
- if isinstance(tags, basestring):
- return tags.split(',') if tags else []
- return tags
-
- def serialize_tags(self, tags):
- return ','.join(tags) if tags else ''
+ @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 active(self):
+ return self['start'] is not None
+
+ @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 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.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):
- 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.backend.complete_task(self)
+
+ # Refresh the status again, so that we have updated info stored
+ self.refresh(only_fields=['status', 'start', 'end'])
def save(self):
- args = [self['id'], 'modify'] if self['id'] else ['add']
- args.extend(self._get_modified_fields_as_args())
- self.warrior.execute_command(args)
- self._modified_fields.clear()
+ if self.saved and not self.modified:
+ return
- def _get_modified_fields_as_args(self):
- args = []
- for field in self._modified_fields:
- args.append('{}:{}'.format(field, self._data[field]))
- return args
+ # All the actual work is done by the backend
+ self.backend.save_task(self)
- __repr__ = __unicode__
+ def add_annotation(self, annotation):
+ if not self.saved:
+ raise Task.NotSaved("Task needs to be saved to add annotation")
+ self.backend.annotate_task(self, annotation)
+ self.refresh(only_fields=['annotations'])
-class TaskFilter(object):
- """
- A set of parameters to filter the task list with.
- """
+ def remove_annotation(self, annotation):
+ if not self.saved:
+ raise Task.NotSaved("Task needs to be saved to remove annotation")
- def __init__(self, filter_params=[]):
- self.filter_params = filter_params
+ if isinstance(annotation, TaskAnnotation):
+ annotation = annotation['description']
- def add_filter(self, filter_str):
- self.filter_params.append(filter_str)
+ self.backend.denotate_task(self, annotation)
+ self.refresh(only_fields=['annotations'])
- def add_filter_param(self, key, value):
- key = key.replace('__', '.')
- self.filter_params.append('{0}:{1}'.format(key, value))
+ 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")
- def get_filter_params(self):
- return [f for f in self.filter_params if f]
+ new_data = self.backend.refresh_task(self, after_save=after_save)
- def clone(self):
- c = self.__class__()
- c.filter_params = list(self.filter_params)
- return c
+ if only_fields:
+ to_update = dict(
+ [(k, new_data.get(k)) for k in only_fields])
+ self._update_data(to_update, update_original=True)
+ else:
+ self._load_data(new_data)
class TaskQuerySet(object):
Represents a lazy lookup for a task objects.
"""
- def __init__(self, warrior=None, filter_obj=None):
- self.warrior = warrior
+ def __init__(self, backend, filter_obj=None):
+ self.backend = backend
self._result_cache = None
- self.filter_obj = filter_obj or TaskFilter()
+ self.filter_obj = filter_obj or self.backend.filter_class(backend)
def __deepcopy__(self, memo):
"""
Deep copy of a QuerySet doesn't populate the cache
"""
- obj = self.__class__()
+ obj = self.__class__(backend=self.backend)
for k, v in self.__dict__.items():
if k in ('_iter', '_result_cache'):
obj.__dict__[k] = None
if klass is None:
klass = self.__class__
filter_obj = self.filter_obj.clone()
- c = klass(warrior=self.warrior, filter_obj=filter_obj)
+ c = klass(backend=self.backend, filter_obj=filter_obj)
c.__dict__.update(kwargs)
return c
"""
Fetch the tasks which match the current filters.
"""
- return self.warrior.filter_tasks(self.filter_obj)
+ return self.backend.filter_tasks(self.filter_obj)
def all(self):
"""
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),
- }
- self.tasks = TaskQuerySet(self)
-
- 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 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 = 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:
- tasks.append(Task(self, json.loads(data)))
- 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'], config_override={
- 'confirmation': 'no',
- })
projects / etc / taskwarrior.git / blobdiff