Source code for ddf.ddf

"""Sample Implementation of Node and AntLink classes."""

import datetime
from dataclasses import dataclass
from uuid import UUID

UUID_VERSION = 7
"""UUIDs should use version 7 to be able to encode a datetime."""




@dataclass
class NodeId:
    """Represent a Node.

    For security reasons: use any version of UUID (i.e. UUIDv4)
    """

    uuid: UUID

    def __hash__(self) -> int:
        return self.uuid.__hash__()





@dataclass
class ObjectId:
    """Represent an object.

    This could be a reference to a timestamp or a batch.
    """

    uuid: UUID

    def __hash__(self) -> int:
        return self.uuid.__hash__()





@dataclass
class Id:
    node_id: NodeId
    object_id: ObjectId | None





def pretty_print_uuid7(uuid: UUID) -> str:
    if uuid.version == UUID_VERSION:
        return datetime.datetime.fromtimestamp(uuid.time).strftime("%c")
    else:
        return ""