--- /dev/null
+import abc
+import copy
+import datetime
+import json
+import logging
+import os
+import re
+import six
+import subprocess
+
+from .task import Task, TaskQuerySet, ReadOnlyDictView
+from .filters import TaskWarriorFilter
+from .serializing import local_zone
+
+DATE_FORMAT_CALC = '%Y-%m-%dT%H:%M:%S'
+
+logger = logging.getLogger(__name__)
+
+
+class Backend(object):
+
+ @abc.abstractproperty
+ def filter_class(self):
+ """Returns the TaskFilter class used by this backend"""
+ pass
+
+ @abc.abstractmethod
+ def filter_tasks(self, filter_obj):
+ """Returns a list of Task objects matching the given filter"""
+ pass
+
+ @abc.abstractmethod
+ def save_task(self, task):
+ pass
+
+ @abc.abstractmethod
+ def delete_task(self, task):
+ pass
+
+ @abc.abstractmethod
+ def start_task(self, task):
+ pass
+
+ @abc.abstractmethod
+ def stop_task(self, task):
+ pass
+
+ @abc.abstractmethod
+ def complete_task(self, task):
+ pass
+
+ @abc.abstractmethod
+ def refresh_task(self, task, after_save=False):
+ """
+ Refreshes the given task. Returns new data dict with serialized
+ attributes.
+ """
+ pass
+
+ @abc.abstractmethod
+ def annotate_task(self, task, annotation):
+ pass
+
+ @abc.abstractmethod
+ def denotate_task(self, task, annotation):
+ pass
+
+ @abc.abstractmethod
+ def sync(self):
+ """Syncs the backend database with the taskd server"""
+ pass
+
+ def convert_datetime_string(self, value):
+ """
+ Converts TW syntax datetime string to a localized datetime
+ object. This method is not mandatory.
+ """
+ raise NotImplementedError
+
+
+class TaskWarriorException(Exception):
+ pass
+
+
+class TaskWarrior(Backend):
+
+ 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')
+ VERSION_2_4_1 = six.u('2.4.1')
+ VERSION_2_4_2 = six.u('2.4.2')
+ VERSION_2_4_3 = six.u('2.4.3')
+ VERSION_2_4_4 = six.u('2.4.4')
+ VERSION_2_4_5 = six.u('2.4.5')
+
+ def __init__(self, data_location=None, create=True,
+ taskrc_location=None, task_command='task',
+ version_override=None):
+ self.taskrc_location = None
+ if taskrc_location:
+ self.taskrc_location = os.path.expanduser(taskrc_location)
+
+ # If taskrc does not exist, pass / to use defaults and avoid creating
+ # dummy .taskrc file by TaskWarrior
+ if not os.path.exists(self.taskrc_location):
+ self.taskrc_location = '/'
+
+ self.task_command = task_command
+
+ self._config = None
+ self.version = version_override or self._get_version()
+ self.overrides = {
+ 'confirmation': 'no',
+ 'dependency.confirmation': 'no', # See TW-1483 or taskrc man page
+ 'recurrence.confirmation': 'no', # Necessary for modifying R tasks
+
+ # Defaults to on since 2.4.5, we expect off during parsing
+ 'json.array': 'off',
+
+ # 2.4.3 onwards supports 0 as infite bulk, otherwise set just
+ # arbitrary big number which is likely to be large enough
+ 'bulk': 0 if self.version >= self.VERSION_2_4_3 else 100000,
+ }
+
+ # Set data.location override if passed via kwarg
+ if data_location is not None:
+ data_location = os.path.expanduser(data_location)
+ if create and not os.path.exists(data_location):
+ os.makedirs(data_location)
+ self.overrides['data.location'] = data_location
+
+ self.tasks = TaskQuerySet(self)
+
+ def _get_task_command(self):
+ return self.task_command.split()
+
+ def _get_command_args(self, args, config_override=None):
+ command_args = self._get_task_command()
+ overrides = self.overrides.copy()
+ overrides.update(config_override or dict())
+ for item in overrides.items():
+ command_args.append('rc.{0}={1}'.format(*item))
+ command_args.extend([
+ x.decode('utf-8') if isinstance(x, six.binary_type)
+ else six.text_type(x) for x in args
+ ])
+ return command_args
+
+ def _get_version(self):
+ p = subprocess.Popen(
+ self._get_task_command() + ['--version'],
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ stdout, stderr = [x.decode('utf-8') for x in p.communicate()]
+ return stdout.strip('\n')
+
+ def _get_modified_task_fields_as_args(self, task):
+ args = []
+
+ def add_field(field):
+ # Add the output of format_field method to args list (defaults to
+ # field:value)
+ serialized_value = task._serialize(field, task._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 = six.u("'{0}'").format(
+ serialized_value)
+
+ format_default = lambda task: six.u("{0}:{1}").format(
+ field, escaped_serialized_value)
+
+ format_func = getattr(self, 'format_{0}'.format(field),
+ format_default)
+
+ args.append(format_func(task))
+
+ # If we're modifying saved task, simply pass on all modified fields
+ if task.saved:
+ for field in task._modified_fields:
+ add_field(field)
+
+ # For new tasks, pass all fields that make sense
+ else:
+ for field in task._data.keys():
+ # We cannot set stuff that's read only (ID, UUID, ..)
+ if field in task.read_only_fields:
+ continue
+ # We do not want to do field deletion for new tasks
+ if task._data[field] is None:
+ continue
+ # Otherwise we're fine
+ add_field(field)
+
+ return args
+
+ def format_depends(self, task):
+ # 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 = task._original_data.get('depends', set())
+
+ added = task['depends'] - old_dependencies
+ removed = old_dependencies - task['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):
+ # Task version older than 2.4.0 ignores first word of the
+ # task description if description: prefix is used
+ if self.version < self.VERSION_2_4_0:
+ return task._data['description']
+ else:
+ return six.u("description:'{0}'").format(
+ task._data['description'] or '',
+ )
+
+ def convert_datetime_string(self, value):
+
+ if self.version >= self.VERSION_2_4_0:
+ # For strings, use 'calc' to evaluate the string to datetime
+ # available since TW 2.4.0
+ args = value.split()
+ result = self.execute_command(['calc'] + args)
+ naive = datetime.datetime.strptime(result[0], DATE_FORMAT_CALC)
+ localized = local_zone.localize(naive)
+ else:
+ raise ValueError(
+ 'Provided value could not be converted to '
+ 'datetime, its type is not supported: {}'
+ .format(type(value)),
+ )
+
+ return localized
+
+ @property
+ def filter_class(self):
+ return TaskWarriorFilter
+
+ # Public interface
+
+ @property
+ def config(self):
+ # First, check if memoized information is available
+ if self._config:
+ return self._config
+
+ # If not, fetch the config using the 'show' command
+ raw_output = self.execute_command(
+ ['show'],
+ config_override={'verbose': 'nothing'}
+ )
+
+ config = dict()
+ config_regex = re.compile(r'^(?P<key>[^\s]+)\s+(?P<value>[^\s].*$)')
+
+ for line in raw_output:
+ match = config_regex.match(line)
+ if match:
+ config[match.group('key')] = match.group('value').strip()
+
+ # Memoize the config dict
+ self._config = ReadOnlyDictView(config)
+
+ return self._config
+
+ def execute_command(self, args, config_override=None, allow_failure=True,
+ return_all=False):
+ command_args = self._get_command_args(
+ args, config_override=config_override)
+ logger.debug(u' '.join(command_args))
+
+ env = os.environ.copy()
+ if self.taskrc_location:
+ env['TASKRC'] = self.taskrc_location
+ p = subprocess.Popen(command_args, stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE, env=env)
+ stdout, stderr = [x.decode('utf-8') for x in p.communicate()]
+ if p.returncode and allow_failure:
+ if stderr.strip():
+ error_msg = stderr.strip()
+ else:
+ error_msg = stdout.strip()
+ error_msg += u'\nCommand used: ' + u' '.join(command_args)
+ raise TaskWarriorException(error_msg)
+
+ # Return all whole triplet only if explicitly asked for
+ if not return_all:
+ return stdout.rstrip().split('\n')
+ else:
+ return (stdout.rstrip().split('\n'),
+ stderr.rstrip().split('\n'),
+ p.returncode)
+
+ def enforce_recurrence(self):
+ # Run arbitrary report command which will trigger generation
+ # of recurrent tasks.
+
+ # Only necessary for TW up to 2.4.1, fixed in 2.4.2.
+ if self.version < self.VERSION_2_4_2:
+ self.execute_command(['next'], allow_failure=False)
+
+ 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'])
+
+ # Backend interface implementation
+
+ 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:
+ 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 save_task(self, task):
+ """Save a task into TaskWarrior database using add/modify call"""
+
+ args = [task['uuid'], 'modify'] if task.saved else ['add']
+ args.extend(self._get_modified_task_fields_as_args(task))
+ output = self.execute_command(args)
+
+ # Parse out the new ID, if the task is being added for the first time
+ if not task.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.
+ # Expected output: Created task 1.
+ # Created task 1 (recurrence template).
+ if len(id_lines) != 1 or len(id_lines[0].split(' ')) not in (3, 5):
+ raise TaskWarriorException(
+ 'Unexpected output when creating '
+ 'task: %s' % '\n'.join(id_lines),
+ )
+
+ # Circumvent the ID storage, since ID is considered read-only
+ identifier = id_lines[0].split(' ')[2].rstrip('.')
+
+ # Identifier can be either ID or UUID for completed tasks
+ try:
+ task._data['id'] = int(identifier)
+ except ValueError:
+ task._data['uuid'] = identifier
+
+ # 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
+ task.refresh(after_save=True)
+
+ def delete_task(self, task):
+ self.execute_command([task['uuid'], 'delete'])
+
+ def start_task(self, task):
+ self.execute_command([task['uuid'], 'start'])
+
+ def stop_task(self, task):
+ self.execute_command([task['uuid'], 'stop'])
+
+ def complete_task(self, task):
+ # Older versions of TW do not stop active task at completion
+ if self.version < self.VERSION_2_4_0 and task.active:
+ task.stop()
+
+ self.execute_command([task['uuid'], 'done'])
+
+ def annotate_task(self, task, annotation):
+ args = [task['uuid'], 'annotate', annotation]
+ self.execute_command(args)
+
+ def denotate_task(self, task, annotation):
+ args = [task['uuid'], 'denotate', annotation]
+ self.execute_command(args)
+
+ def refresh_task(self, task, after_save=False):
+ # 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 = [task['uuid'] or task['id'], 'export']
+ output = self.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.version < self.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(task._data)
+ data.pop('id', None)
+ data.pop('uuid', None)
+
+ taskfilter = self.filter_class(self)
+ for key, value in data.items():
+ taskfilter.add_filter_param(key, value)
+
+ output = self.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(
+ task['uuid'] or task['id'], task['description'], output)
+ )
+
+ return json.loads(output[0])
+
+ def sync(self):
+ self.execute_command(['sync'])
projects / etc / taskwarrior.git / blobdiff