37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
import json
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from collections.abc import Generator
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from typing import Generic, Optional, TypeVar
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from pydantic import BaseModel
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class BaseBackwardsInvocation:
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@classmethod
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def convert_to_event_stream(cls, response: Generator[BaseModel | dict | str, None, None] | BaseModel | dict):
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if isinstance(response, Generator):
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try:
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for chunk in response:
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if isinstance(chunk, BaseModel):
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yield BaseBackwardsInvocationResponse(data=chunk).model_dump_json().encode() + b"\n\n"
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elif isinstance(chunk, str):
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yield f"event: {chunk}\n\n".encode()
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else:
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yield json.dumps(chunk).encode() + b"\n\n"
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except Exception as e:
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error_message = BaseBackwardsInvocationResponse(error=str(e)).model_dump_json()
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yield f"{error_message}\n\n".encode()
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else:
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if isinstance(response, BaseModel):
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yield response.model_dump_json().encode() + b"\n\n"
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else:
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yield json.dumps(response).encode() + b"\n\n"
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T = TypeVar("T", bound=BaseModel | dict | str | bool | int)
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class BaseBackwardsInvocationResponse(BaseModel, Generic[T]):
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data: Optional[T] = None
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error: str = ""
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