X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/9a7dac4599f198c52f268ae8bcc0267743ef934f:/tasklib/serializing.py..8078ceed9b50dad2d319a74e2d3014b6ff649b47:/code/taskwarrior/tasklib/tasklib/static/gitweb.js diff --git a/tasklib/serializing.py b/tasklib/serializing.py deleted file mode 100644 index 8cdeaf2..0000000 --- a/tasklib/serializing.py +++ /dev/null @@ -1,254 +0,0 @@ -import datetime -import importlib -import json -import pytz -import six -import tzlocal - - -from .lazy import LazyUUIDTaskSet, LazyUUIDTask - -DATE_FORMAT = '%Y%m%dT%H%M%SZ' -local_zone = tzlocal.get_localzone() - - -class SerializingObject(object): - """ - Common ancestor for TaskResource & TaskWarriorFilter, since they both - need to serialize arguments. - - Serializing method should hold the following contract: - - any empty value (meaning removal of the attribute) - is deserialized into a empty string - - None denotes a empty value for any attribute - - Deserializing method should hold the following contract: - - None denotes a empty value for any attribute (however, - this is here as a safeguard, TaskWarrior currently does - not export empty-valued attributes) if the attribute - is not iterable (e.g. list or set), in which case - a empty iterable should be used. - - Normalizing methods should hold the following contract: - - They are used to validate and normalize the user input. - Any attribute value that comes from the user (during Task - initialization, assignign values to Task attributes, or - filtering by user-provided values of attributes) is first - validated and normalized using the normalize_{key} method. - - If validation or normalization fails, normalizer is expected - to raise ValueError. - """ - - def __init__(self, backend): - self.backend = backend - - def _deserialize(self, key, value): - hydrate_func = getattr(self, 'deserialize_{0}'.format(key), - lambda x: x if x != '' else None) - return hydrate_func(value) - - def _serialize(self, key, value): - dehydrate_func = getattr(self, 'serialize_{0}'.format(key), - lambda x: x if x is not None else '') - return dehydrate_func(value) - - def _normalize(self, key, value): - """ - Use normalize_ methods to normalize user input. Any user - input will be normalized at the moment it is used as filter, - or entered as a value of Task attribute. - """ - - # None value should not be converted by normalizer - if value is None: - return None - - normalize_func = getattr(self, 'normalize_{0}'.format(key), - lambda x: x) - - return normalize_func(value) - - def timestamp_serializer(self, date): - if not date: - return '' - - # Any serialized timestamp should be localized, we need to - # convert to UTC before converting to string (DATE_FORMAT uses UTC) - date = date.astimezone(pytz.utc) - - return date.strftime(DATE_FORMAT) - - def timestamp_deserializer(self, date_str): - if not date_str: - return None - - # Return timestamp localized in the local zone - naive_timestamp = datetime.datetime.strptime(date_str, DATE_FORMAT) - localized_timestamp = pytz.utc.localize(naive_timestamp) - return localized_timestamp.astimezone(local_zone) - - def serialize_entry(self, value): - return self.timestamp_serializer(value) - - def deserialize_entry(self, value): - return self.timestamp_deserializer(value) - - def normalize_entry(self, value): - return self.datetime_normalizer(value) - - def serialize_modified(self, value): - return self.timestamp_serializer(value) - - def deserialize_modified(self, value): - return self.timestamp_deserializer(value) - - def normalize_modified(self, value): - return self.datetime_normalizer(value) - - def serialize_start(self, value): - return self.timestamp_serializer(value) - - def deserialize_start(self, value): - return self.timestamp_deserializer(value) - - def normalize_start(self, value): - return self.datetime_normalizer(value) - - def serialize_end(self, value): - return self.timestamp_serializer(value) - - def deserialize_end(self, value): - return self.timestamp_deserializer(value) - - def normalize_end(self, value): - return self.datetime_normalizer(value) - - def serialize_due(self, value): - return self.timestamp_serializer(value) - - def deserialize_due(self, value): - return self.timestamp_deserializer(value) - - def normalize_due(self, value): - return self.datetime_normalizer(value) - - def serialize_scheduled(self, value): - return self.timestamp_serializer(value) - - def deserialize_scheduled(self, value): - return self.timestamp_deserializer(value) - - def normalize_scheduled(self, value): - return self.datetime_normalizer(value) - - def serialize_until(self, value): - return self.timestamp_serializer(value) - - def deserialize_until(self, value): - return self.timestamp_deserializer(value) - - def normalize_until(self, value): - return self.datetime_normalizer(value) - - def serialize_wait(self, value): - return self.timestamp_serializer(value) - - def deserialize_wait(self, value): - return self.timestamp_deserializer(value) - - def normalize_wait(self, value): - return self.datetime_normalizer(value) - - def serialize_annotations(self, value): - value = value if value is not None else [] - - # This may seem weird, but it's correct, we want to export - # a list of dicts as serialized value - serialized_annotations = [json.loads(annotation.export_data()) - for annotation in value] - return serialized_annotations if serialized_annotations else '' - - def deserialize_annotations(self, data): - task_module = importlib.import_module('tasklib.task') - TaskAnnotation = getattr(task_module, 'TaskAnnotation') - return [TaskAnnotation(self, d) for d in data] if data else [] - - def serialize_tags(self, tags): - return ','.join(tags) if tags else '' - - def deserialize_tags(self, tags): - if isinstance(tags, six.string_types): - return set(tags.split(',')) if tags else set() - return set(tags or []) - - def serialize_parent(self, parent): - return parent['uuid'] if parent else '' - - def deserialize_parent(self, uuid): - return LazyUUIDTask(self.backend, uuid) if uuid else None - - def serialize_depends(self, value): - # Return the list of uuids - value = value if value is not None else set() - - if isinstance(value, LazyUUIDTaskSet): - return ','.join(value._uuids) - else: - return ','.join(task['uuid'] for task in value) - - def deserialize_depends(self, raw_uuids): - raw_uuids = raw_uuids or [] # Convert None to empty list - - if not raw_uuids: - return set() - - # TW 2.4.4 encodes list of dependencies as a single string - if type(raw_uuids) is not list: - uuids = raw_uuids.split(',') - # TW 2.4.5 and later exports them as a list, no conversion needed - else: - uuids = raw_uuids - - return LazyUUIDTaskSet(self.backend, uuids) - - def datetime_normalizer(self, value): - """ - Normalizes date/datetime value (considered to come from user input) - to localized datetime value. Following conversions happen: - - naive date -> localized datetime with the same date, and time=midnight - naive datetime -> localized datetime with the same value - localized datetime -> localized datetime (no conversion) - """ - - if ( - isinstance(value, datetime.date) - and not isinstance(value, datetime.datetime) - ): - # Convert to local midnight - value_full = datetime.datetime.combine(value, datetime.time.min) - localized = local_zone.localize(value_full) - elif isinstance(value, datetime.datetime): - if value.tzinfo is None: - # Convert to localized datetime object - localized = local_zone.localize(value) - else: - # If the value is already localized, there is no need to change - # time zone at this point. Also None is a valid value too. - localized = value - elif isinstance(value, six.string_types): - localized = self.backend.convert_datetime_string(value) - else: - raise ValueError("Provided value could not be converted to " - "datetime, its type is not supported: {}" - .format(type(value))) - - return localized - - def normalize_uuid(self, value): - # Enforce sane UUID - if not isinstance(value, six.string_types) or value == '': - raise ValueError("UUID must be a valid non-empty string, " - "not: {}".format(value)) - - return value