import copy import json import os import subprocess import tempfile import uuid REPR_OUTPUT_SIZE = 10 PENDING = 'pending' class TaskWarriorException(Exception): pass class Task(object): class DoesNotExist(Exception): pass def __init__(self, warrior, data={}): self.warrior = warrior self._data = data def __getitem__(self, key): return self._data.get(key) def __setitem__(self, key, val): self._data[key] = val def __unicode__(self): return self._data.get('description') def regenerate_uuid(self): self['uuid'] = str(uuid.uuid4()) def delete(self): self.warrior.delete_task(self['uuid']) def done(self): self.warrior.complete_task(self['uuid']) def save(self, delete_first=True): if self['uuid'] and delete_first: self.delete() if not self['uuid'] or delete_first: self.regenerate_uuid() self.warrior.import_tasks([self._data]) __repr__ = __unicode__ 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, param, value): self.filter_params += ((param, value),) def get_filter_params(self): return self.filter_params def clone(self): c = self.__class__() c.filter_params = tuple(self.filter_params) return c class TaskQuerySet(object): """ Represents a lazy lookup for a task objects. """ def __init__(self, warrior=None, filter_obj=None): self.warrior = warrior self._result_cache = None self.filter_obj = filter_obj or TaskFilter() def __deepcopy__(self, memo): """ Deep copy of a QuerySet doesn't populate the cache """ obj = self.__class__() for k,v in self.__dict__.items(): if k in ('_iter','_result_cache'): obj.__dict__[k] = None else: obj.__dict__[k] = copy.deepcopy(v, memo) return obj def __repr__(self): data = list(self[:REPR_OUTPUT_SIZE + 1]) if len(data) > REPR_OUTPUT_SIZE: data[-1] = "...(remaining elements truncated)..." return repr(data) def __len__(self): if self._result_cache is None: self._result_cache = list(self) return len(self._result_cache) def __iter__(self): if self._result_cache is None: self._result_cache = self._execute() return iter(self._result_cache) def __getitem__(self, k): if self._result_cache is None: self._result_cache = list(self) return self._result_cache.__getitem__(k) def __bool__(self): if self._result_cache is not None: return bool(self._result_cache) try: next(iter(self)) except StopIteration: return False return True def __nonzero__(self): return type(self).__bool__(self) def _clone(self, klass=None, **kwargs): if klass is None: klass = self.__class__ filter_obj = self.filter_obj.clone() c = klass(warrior=self.warrior, filter_obj=filter_obj) c.__dict__.update(kwargs) return c def _execute(self): """ Fetch the tasks which match the current filters. """ return self.warrior._execute_filter(self.filter_obj) def all(self): """ Returns a new TaskQuerySet that is a copy of the current one. """ return self._clone() def pending(self): return self.filter(status=PENDING) def filter(self, **kwargs): """ Returns a new TaskQuerySet with the given filters added. """ clone = self._clone() for param, value in kwargs.items(): clone.filter_obj.add_filter(param, value) return clone def get(self, **kwargs): """ Performs the query and returns a single object matching the given keyword arguments. """ clone = self.filter(**kwargs) num = len(clone) if num == 1: return clone._result_cache[0] if not num: raise Task.DoesNotExist( 'Task matching query does not exist. ' 'Lookup parameters were {0}'.format(kwargs)) raise ValueError( 'get() returned more than one Task -- it returned {0}! ' 'Lookup parameters were {1}'.format(num, kwargs)) class TaskWarrior(object): DEFAULT_FILTERS = { 'status': 'pending', } def __init__(self, data_location='~/.task', create=True): if not os.path.exists(data_location): os.makedirs(data_location) self.config = { 'data.location': os.path.expanduser(data_location), } self.tasks = TaskQuerySet(self) def _generate_command(self, command): args = ['task', 'rc:/'] for item in self.config.items(): args.append('rc.{0}={1}'.format(*item)) args.append(command) return ' '.join(args) def _execute_command(self, command): p = subprocess.Popen(self._generate_command(command), shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = p.communicate() if p.returncode: raise TaskWarriorException(stderr.strip()) return stdout.strip().split('\n') def _format_filter_kwarg(self, kwarg): key, val = kwarg[0], kwarg[1] key = key.replace('__', '.') return '{0}:{1}'.format(key, val) def _execute_filter(self, filter_obj): filter_commands = ' '.join(map(self._format_filter_kwarg, filter_obj.get_filter_params())) command = '{0} export'.format(filter_commands) tasks = [] for line in self._execute_command(command): if line: tasks.append(Task(self, json.loads(line.strip(',')))) return tasks def add_task(self, description, project=None): args = ['add', description] if project is not None: args.append('project:{0}'.format(project)) self._execute_command(' '.join(args)) def delete_task(self, task_id): self._execute_command('{0} rc.confirmation:no delete'.format(task_id)) def complete_task(self, task_id): self._execute_command('{0} done'.format(task_id)) def import_tasks(self, tasks): fd, path = tempfile.mkstemp() with open(path, 'w') as f: f.write(json.dumps(tasks)) self._execute_command('import {0}'.format(path))