✏️ Editing: fields.py Read Only

"""ACME JSON fields."""
import datetime
import logging
from typing import Any

import josepy as jose
import pyrfc3339

logger = logging.getLogger(__name__)

class Fixed(jose.Field):
    """Fixed field."""

def __init__(self, json_name: str, value: Any) -> None:
        self.value = value
        super().__init__(
            json_name=json_name, default=value, omitempty=False)

def decode(self, value: Any) -> Any:
        if value != self.value:
            raise jose.DeserializationError('Expected {0!r}'.format(self.value))
        return self.value

def encode(self, value: Any) -> Any:
        if value != self.value:
            logger.warning(
                'Overriding fixed field (%s) with %r', self.json_name, value)
        return value

class RFC3339Field(jose.Field):
    """RFC3339 field encoder/decoder.

Handles decoding/encoding between RFC3339 strings and aware (not
    naive) `datetime.datetime` objects
    (e.g. ``datetime.datetime.now(pytz.UTC)``).

"""

@classmethod
    def default_encoder(cls, value: datetime.datetime) -> str:
        return pyrfc3339.generate(value)

@classmethod
    def default_decoder(cls, value: str) -> datetime.datetime:
        try:
            return pyrfc3339.parse(value)
        except ValueError as error:
            raise jose.DeserializationError(error)

def fixed(json_name: str, value: Any) -> Any:
    """Generates a type-friendly Fixed field."""
    return Fixed(json_name, value)

def rfc3339(json_name: str, omitempty: bool = False) -> Any:
    """Generates a type-friendly RFC3339 field."""
    return RFC3339Field(json_name, omitempty=omitempty)

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