"""A (proof) presentation content message."""
from typing import Sequence
from marshmallow import fields
from .....messaging.agent_message import AgentMessage, AgentMessageSchema
from .....messaging.decorators.attach_decorator import (
AttachDecorator,
AttachDecoratorSchema,
)
from ..message_types import PRESENTATION, PROTOCOL_PACKAGE
HANDLER_CLASS = f"{PROTOCOL_PACKAGE}.handlers.presentation_handler.PresentationHandler"
[docs]class Presentation(AgentMessage):
"""Class representing a (proof) presentation."""
def __init__(
self,
_id: str = None,
*,
comment: str = None,
presentations_attach: Sequence[AttachDecorator] = None,
**kwargs,
):
"""
Initialize presentation object.
Args:
presentations_attach: attachments
comment: optional comment
"""
super().__init__(_id=_id, **kwargs)
self.comment = comment
self.presentations_attach = (
list(presentations_attach) if presentations_attach else []
)
[docs] def indy_proof(self, index: int = 0):
"""
Retrieve and decode indy proof from attachment.
Args:
index: ordinal in attachment list to decode and return
(typically, list has length 1)
"""
return self.presentations_attach[index].indy_dict
[docs]class PresentationSchema(AgentMessageSchema):
"""(Proof) presentation schema."""
comment = fields.Str(description="Human-readable comment", required=False)
presentations_attach = fields.Nested(
AttachDecoratorSchema, required=True, many=True, data_key="presentations~attach"
)