from __future__ import print_function
import copy
-import datetime
+import importlib
import json
import logging
import os
import six
-import subprocess
+import sys
+
+from .serializing import SerializingObject
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__)
-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)
-class TaskResource(object):
+ 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 = 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 = data.copy()
+ # 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
except ValueError:
pass
- return self._deserialize(key, self._data.get(key))
+ 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)
- self._data[key] = self._serialize(key, value)
-
- def _deserialize(self, key, value):
- hydrate_func = getattr(self, 'deserialize_{0}'.format(key),
- lambda x: x)
- return hydrate_func(value)
- def _serialize(self, key, value):
- dehydrate_func = getattr(self, 'serialize_{0}'.format(key),
- lambda x: x)
- return dehydrate_func(value)
+ # 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']
- def __init__(self, task, data={}):
+ def __init__(self, task, data=None):
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 ''
+ 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(TaskResource):
read_only_fields = ['id', 'entry', 'urgency', 'uuid', 'modified']
"""
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
"""
pass
- def __init__(self, warrior, data={}, **kwargs):
- self.warrior = warrior
+ @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._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)
- # We keep data for backwards compatibility
- # TODO: Should we keep this using unserialized access to _data dict?
- self._data.update(data)
- self._original_data.update(data)
+ # Provide read only access to the original data
+ self.original = ReadOnlyDictView(self._original_data)
def __unicode__(self):
return self['description']
# 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
# 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:
- if self._data.get(key) != self._original_data.get(key):
- yield key
-
@property
def completed(self):
return self['status'] == six.text_type('completed')
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_due(self, date):
- if not date:
- return None
- 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_depends(self, cur_dependencies):
# Check that all the tasks are saved
- for task in cur_dependencies:
+ 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 the list of uuids
- return ','.join(task['uuid'] for task in cur_dependencies)
+ return super(Task, self).serialize_depends(cur_dependencies)
+
+ def delete(self):
+ if not self.saved:
+ raise Task.NotSaved("Task needs to be saved before it can be deleted")
- 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)
+ # Refresh the status, and raise exception if the task is deleted
+ self.refresh(only_fields=['status'])
- def format_depends(self):
- # We need to generate added and removed dependencies list,
- # since Taskwarrior does not accept redefining dependencies.
+ if self.deleted:
+ raise Task.DeletedTask("Task was already deleted")
- # 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
+ self.backend.delete_task(self)
- old_dependencies_raw = self._original_data.get('depends','')
- old_dependencies = self.deserialize_depends(old_dependencies_raw)
+ # Refresh the status again, so that we have updated info stored
+ self.refresh(only_fields=['status', 'start', 'end'])
- added = self['depends'] - old_dependencies
- removed = old_dependencies - self['depends']
+ def start(self):
+ if not self.saved:
+ raise Task.NotSaved("Task needs to be saved before it can be started")
- # Removed dependencies need to be prefixed with '-'
- return ','.join(
- [t['uuid'] for t in added] +
- ['-' + t['uuid'] for t in removed]
- )
+ # Refresh, and raise exception if task is already completed/deleted
+ self.refresh(only_fields=['status'])
- def deserialize_annotations(self, data):
- return [TaskAnnotation(self, d) for d in data] if data else []
+ 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")
- def deserialize_tags(self, tags):
- if isinstance(tags, basestring):
- return tags.split(',') if tags else []
- return tags
+ self.backend.start_task(self)
- def serialize_tags(self, tags):
- return ','.join(tags) if tags else ''
+ # Refresh the status again, so that we have updated info stored
+ self.refresh(only_fields=['status', 'start'])
- def delete(self):
+ def stop(self):
if not self.saved:
- raise Task.NotSaved("Task needs to be saved before it can be deleted")
+ raise Task.NotSaved("Task needs to be saved before it can be stopped")
- # Refresh the status, and raise exception if the task is deleted
+ # Refresh, and raise exception if task is already completed/deleted
self.refresh(only_fields=['status'])
- if self.deleted:
- raise Task.DeletedTask("Task was already deleted")
+ if not self.active:
+ raise Task.InactiveTask("Cannot stop an inactive task")
- self.warrior.execute_command([self['uuid'], 'delete'], config_override={
- 'confirmation': 'no',
- })
+ self.backend.stop_task(self)
# Refresh the status again, so that we have updated info stored
- self.refresh(only_fields=['status'])
-
+ self.refresh(only_fields=['status', 'start'])
def done(self):
if not self.saved:
elif self.deleted:
raise Task.DeletedTask("Deleted task cannot be completed")
- self.warrior.execute_command([self['uuid'], 'done'])
+ self.backend.complete_task(self)
# 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):
- 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))
+ if self.saved and not self.modified:
+ return
- # Circumvent the ID storage, since ID is considered read-only
- self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.'))
-
- 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:
raise Task.NotSaved("Task needs to be saved to add annotation")
- args = [self['uuid'], 'annotate', annotation]
- self.warrior.execute_command(args)
+ self.backend.annotate_task(self, annotation)
self.refresh(only_fields=['annotations'])
def remove_annotation(self, annotation):
if not self.saved:
- raise Task.NotSaved("Task needs to be saved to add annotation")
+ 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)
- self.refresh(only_fields=['annotations'])
- def _get_modified_fields_as_args(self):
- args = []
-
- def add_field(field):
- # 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 and field == 'description':
- args.append(self._data[field])
- elif field == 'depends':
- args.append('{0}:{1}'.format(field, self.format_depends()))
- else:
- # Use empty string to substitute for None value
- args.append('{0}:{1}'.format(field, self._data[field] or ''))
-
- # 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
+ self.backend.denotate_task(self, annotation)
+ self.refresh(only_fields=['annotations'])
- 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")
- # 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])
+ new_data = self.backend.refresh_task(self, after_save=after_save)
+
if only_fields:
to_update = dict(
[(k, new_data.get(k)) for k in only_fields])
- self._data.update(to_update)
- self._original_data.update(to_update)
- else:
- self._data = new_data
- # We need to create a clone for original_data though
- # Shallow copy is alright, since data dict uses only
- # primitive data types
- self._original_data = new_data.copy()
-
-
-class TaskFilter(object):
- """
- A set of parameters to filter the task list with.
- """
-
- def __init__(self, filter_params=[]):
- self.filter_params = filter_params
-
- def add_filter(self, filter_str):
- self.filter_params.append(filter_str)
-
- def add_filter_param(self, key, value):
- key = key.replace('__', '.')
-
- # Replace the value with empty string, since that is the
- # convention in TW for empty values
- value = value if value is not None else ''
-
- # 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)
+ self._update_data(to_update, update_original=True)
else:
- self.filter_params.append('{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.filter_params = list(self.filter_params)
- return c
+ 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)
- 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:
- 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