-class SerializingObject(object):
- """
- Common ancestor for TaskResource & TaskFilter, 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, warrior):
- self.warrior = warrior
-
- 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_<key> 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):
- 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 tags.split(',') if tags else []
- return tags or []
-
- def serialize_depends(self, value):
- # Return the list of uuids
- value = value if value is not None else set()
- return ','.join(task['uuid'] for task in value)
-
- 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 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):
- # For strings, use 'task calc' to evaluate the string to datetime
- args = value.split()
- result = self.warrior.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
-
- 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
-
-
projects / etc / taskwarrior.git / blobdiff