mirror of
https://github.com/All-Hands-AI/OpenHands.git
synced 2026-04-29 03:00:45 -04:00
81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
from enum import Enum
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from typing import Literal
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from pydantic import BaseModel, Field, model_serializer
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class ContentType(Enum):
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TEXT = 'text'
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IMAGE_URL = 'image_url'
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class Content(BaseModel):
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type: str
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cache_prompt: bool = False
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@model_serializer
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def serialize_model(self):
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raise NotImplementedError('Subclasses should implement this method.')
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class TextContent(Content):
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type: str = ContentType.TEXT.value
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text: str
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@model_serializer
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def serialize_model(self):
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data: dict[str, str | dict[str, str]] = {
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'type': self.type,
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'text': self.text,
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}
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if self.cache_prompt:
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data['cache_control'] = {'type': 'ephemeral'}
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return data
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class ImageContent(Content):
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type: str = ContentType.IMAGE_URL.value
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image_urls: list[str]
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@model_serializer
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def serialize_model(self):
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images: list[dict[str, str | dict[str, str]]] = []
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for url in self.image_urls:
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images.append({'type': self.type, 'image_url': {'url': url}})
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if self.cache_prompt and images:
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images[-1]['cache_control'] = {'type': 'ephemeral'}
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return images
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class Message(BaseModel):
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role: Literal['user', 'system', 'assistant']
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content: list[TextContent | ImageContent] = Field(default=list)
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@property
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def contains_image(self) -> bool:
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return any(isinstance(content, ImageContent) for content in self.content)
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@model_serializer
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def serialize_model(self) -> dict:
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content: list[dict] | str
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if self.role == 'system':
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# For system role, concatenate all text content into a single string
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content = '\n'.join(
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item.text for item in self.content if isinstance(item, TextContent)
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)
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elif self.role == 'assistant' and not self.contains_image:
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# For assistant role without vision, concatenate all text content into a single string
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content = '\n'.join(
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item.text for item in self.content if isinstance(item, TextContent)
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)
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else:
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# For user role or assistant role with vision enabled, serialize each content item
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content = []
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for item in self.content:
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if isinstance(item, TextContent):
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content.append(item.model_dump())
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elif isinstance(item, ImageContent):
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content.extend(item.model_dump())
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return {'content': content, 'role': self.role}
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