86 lines
3.1 KiB
Python
86 lines
3.1 KiB
Python
# Copyright 2018 Google LLC
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# https://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from datetime import datetime
|
|
from datetime import timedelta
|
|
from datetime import timezone
|
|
|
|
from google.protobuf import duration_pb2
|
|
from google.protobuf import timestamp_pb2
|
|
from proto import datetime_helpers, utils
|
|
|
|
|
|
class TimestampRule:
|
|
"""A marshal between Python datetimes and protobuf timestamps.
|
|
|
|
Note: Python datetimes are less precise than protobuf datetimes
|
|
(microsecond vs. nanosecond level precision). If nanosecond-level
|
|
precision matters, it is recommended to interact with the internal
|
|
proto directly.
|
|
"""
|
|
|
|
def to_python(
|
|
self, value, *, absent: bool = None
|
|
) -> datetime_helpers.DatetimeWithNanoseconds:
|
|
if isinstance(value, timestamp_pb2.Timestamp):
|
|
if absent:
|
|
return None
|
|
return datetime_helpers.DatetimeWithNanoseconds.from_timestamp_pb(value)
|
|
return value
|
|
|
|
def to_proto(self, value) -> timestamp_pb2.Timestamp:
|
|
if isinstance(value, datetime_helpers.DatetimeWithNanoseconds):
|
|
return value.timestamp_pb()
|
|
if isinstance(value, datetime):
|
|
return timestamp_pb2.Timestamp(
|
|
seconds=int(value.timestamp()),
|
|
nanos=value.microsecond * 1000,
|
|
)
|
|
if isinstance(value, str):
|
|
timestamp_value = timestamp_pb2.Timestamp()
|
|
timestamp_value.FromJsonString(value=value)
|
|
return timestamp_value
|
|
return value
|
|
|
|
|
|
class DurationRule:
|
|
"""A marshal between Python timedeltas and protobuf durations.
|
|
|
|
Note: Python timedeltas are less precise than protobuf durations
|
|
(microsecond vs. nanosecond level precision). If nanosecond-level
|
|
precision matters, it is recommended to interact with the internal
|
|
proto directly.
|
|
"""
|
|
|
|
def to_python(self, value, *, absent: bool = None) -> timedelta:
|
|
if isinstance(value, duration_pb2.Duration):
|
|
return timedelta(
|
|
days=value.seconds // 86400,
|
|
seconds=value.seconds % 86400,
|
|
microseconds=value.nanos // 1000,
|
|
)
|
|
return value
|
|
|
|
def to_proto(self, value) -> duration_pb2.Duration:
|
|
if isinstance(value, timedelta):
|
|
return duration_pb2.Duration(
|
|
seconds=value.days * 86400 + value.seconds,
|
|
nanos=value.microseconds * 1000,
|
|
)
|
|
if isinstance(value, str):
|
|
duration_value = duration_pb2.Duration()
|
|
duration_value.FromJsonString(value=value)
|
|
return duration_value
|
|
return value
|