X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/57e5c12f9f47639ab48bb53103aaf831b675c53b..cef665aa15650de3a3710215d83d6910f046209f:/tasklib/task.py?ds=sidebyside diff --git a/tasklib/task.py b/tasklib/task.py index a3f1487..27df12c 100644 --- a/tasklib/task.py +++ b/tasklib/task.py @@ -1,50 +1,195 @@ +from __future__ import print_function import copy import datetime import json +import logging import os +import six import subprocess -import tempfile -import uuid - 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 Task(object): +class TaskResource(object): + read_only_fields = [] + + def _load_data(self, data): + self._data = data + # We need to use a copy for original data, so that changes + # are not propagated. Shallow copy is alright, since data dict uses only + # primitive data types + self._original_data = data.copy() + + 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(data) + + if update_original: + self._original_data.update(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 + + return self._deserialize(key, 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) + + 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) + + +class TaskAnnotation(TaskResource): + read_only_fields = ['entry', 'description'] + + def __init__(self, task, data={}): + 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'] + + __repr__ = __unicode__ + + +class Task(TaskResource): + read_only_fields = ['id', 'entry', 'urgency', 'uuid', 'modified'] class DoesNotExist(Exception): pass - def __init__(self, warrior, data={}): + 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 NotSaved(Exception): + """ + Raised when the operation cannot be performed on the task, because + it has not been saved to TaskWarrior yet. + """ + pass + + def __init__(self, warrior, **kwargs): self.warrior = warrior - self._data = data - def __getitem__(self, key): - return self._get_field(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 - def __setitem__(self, key, val): - self._data[key] = val + # Rather unfortunate syntax due to python2.6 comaptiblity + self._load_data(dict((key, self._serialize(key, value)) + for (key, value) in six.iteritems(kwargs))) def __unicode__(self): - return self._data.get('description') - - def _get_field(self, key): - hydrate_func = getattr(self, 'deserialize_{0}'.format(key), lambda x:x) - return hydrate_func(self._data.get(key)) + 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 _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') + + @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') - def _set_field(self, key, value): - dehydrate_func = getattr(self, 'serialize_{0}'.format(key), lambda x:x) - self._data[key] = dehydrate_func(value) + @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): @@ -52,36 +197,173 @@ class Task(object): 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 serialize_depends(self, cur_dependencies): + # Check that all the tasks are saved + for task in cur_dependencies: + 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) + + 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 format_depends(self): + # 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_raw = self._original_data.get('depends','') + old_dependencies = self.deserialize_depends(old_dependencies_raw) + + 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 deserialize_annotations(self, data): + return [TaskAnnotation(self, d) for d in data] if data else [] - 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 regenerate_uuid(self): - self['uuid'] = str(uuid.uuid4()) + def serialize_tags(self, tags): + return ','.join(tags) if tags else '' + + 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): - self.warrior.delete_task(self['uuid']) + if not self.saved: + raise Task.NotSaved("Task needs to be saved before it can be deleted") - def done(self): - self.warrior.complete_task(self['uuid']) + # Refresh the status, and raise exception if the task is deleted + self.refresh(only_fields=['status']) - 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]) + if self.deleted: + raise Task.DeletedTask("Task was already deleted") - __repr__ = __unicode__ + self.warrior.execute_command([self['uuid'], 'delete'], config_override={ + 'confirmation': 'no', + }) + + # 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 Task.CompletedTask("Cannot complete a completed task") + elif self.deleted: + raise Task.DeletedTask("Deleted task cannot be completed") + + self.warrior.execute_command([self['uuid'], 'done']) + + # Refresh the status again, so that we have updated info stored + self.refresh(only_fields=['status']) + + 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)) + + # Circumvent the ID storage, since ID is considered read-only + self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.')) + + 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) + 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") + + 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): + # Add the output of format_field method to args list (defaults to + # field:value) + format_default = lambda k: "{0}:'{1}'".format(k, self._data[k] or '') + format_func = getattr(self, 'format_{0}'.format(field), + lambda: format_default(field)) + 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: + 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 + + def refresh(self, only_fields=[]): + # 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]) + 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 TaskFilter(object): @@ -97,7 +379,17 @@ class TaskFilter(object): def add_filter_param(self, key, value): key = key.replace('__', '.') - self.filter_params.append('{0}:{1}'.format(key, value)) + + # 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) + 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] @@ -123,8 +415,8 @@ class TaskQuerySet(object): 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'): + 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) @@ -186,6 +478,9 @@ class TaskQuerySet(object): def pending(self): return self.filter(status=PENDING) + def completed(self): + return self.filter(status=COMPLETED) + def filter(self, *args, **kwargs): """ Returns a new TaskQuerySet with the given filters added. @@ -217,12 +512,14 @@ class TaskQuerySet(object): class TaskWarrior(object): def __init__(self, data_location='~/.task', create=True): - if not os.path.exists(data_location): + 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:/'] @@ -230,17 +527,29 @@ class TaskWarrior(object): config.update(config_override) for item in config.items(): command_args.append('rc.{0}={1}'.format(*item)) - command_args.extend(args) + 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 = p.communicate() + stdout, stderr = [x.decode('utf-8') for x in p.communicate()] if p.returncode: - error_msg = stderr.strip().splitlines()[-1] + if stderr.strip(): + error_msg = stderr.strip().splitlines()[-1] + else: + error_msg = stdout.strip() raise TaskWarriorException(error_msg) return stdout.strip().split('\n') @@ -249,39 +558,22 @@ class TaskWarrior(object): tasks = [] for line in self.execute_command(args): if line: - tasks.append(Task(self, json.loads(line.strip(',')))) + 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 add_task(self, description, project=None): - args = ['add', description] - if project is not None: - args.append('project:{0}'.format(project)) - self.execute_command(args) - - def delete_task(self, task_id): - args = [task_id, 'rc.confirmation:no', 'delete'] - self.execute_command(args) - - def complete_task(self, task_id): - args = [task_id, 'done'] - self.execute_command(args) - - def import_tasks(self, tasks): - fd, path = tempfile.mkstemp() - with open(path, 'w') as f: - f.write(json.dumps(tasks)) - args = ['import', path] - self.execute_command(args) - def merge_with(self, path, push=False): path = path.rstrip('/') + '/' - args = ['merge', path] - self.execute_command(args, config_override={ + self.execute_command(['merge', path], config_override={ 'merge.autopush': 'yes' if push else 'no', }) def undo(self): - args = ['undo'] - self.execute_command(args, config_override={ + self.execute_command(['undo'], config_override={ 'confirmation': 'no', })