69 lines
2.4 KiB
Python
69 lines
2.4 KiB
Python
"""Agent 可调用的工具定义和实现。"""
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from app.services.image_gen import generate_images
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# OpenAI Function Calling 格式的工具定义
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TOOL_DEFINITIONS = [
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{
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"type": "function",
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"function": {
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"name": "generate_image",
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"description": (
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"根据文字描述生成图片。prompt 必须是英文。"
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"如果用户提供了参考图，会自动传入 ref_image_url 参数。"
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"若当前生图模型为 Stable Diffusion XL，可在正提示后单独一行写 ---NEGATIVE--- 再写负向提示；"
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"不传则服务端会使用该模型的默认负向词。"
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),
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"parameters": {
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"type": "object",
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"properties": {
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"prompt": {
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"type": "string",
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"description": "英文图片描述 prompt，详细描述要生成的图片内容、风格、颜色等",
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},
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"num_images": {
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"type": "integer",
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"description": "生成图片数量，1-4 张",
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"default": 1,
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"minimum": 1,
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"maximum": 4,
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},
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},
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"required": ["prompt"],
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},
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},
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}
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]
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async def execute_tool(
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tool_name: str,
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arguments: dict,
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ref_image_urls: list[str] | None = None,
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image_model: str | None = None,
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) -> dict:
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"""执行工具调用，返回结果。"""
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if tool_name == "generate_image":
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prompt = arguments["prompt"]
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num_images = arguments.get("num_images", 1)
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result = await generate_images(
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prompt=prompt,
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num_images=num_images,
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ref_image_urls=ref_image_urls,
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model_id=image_model,
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)
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valid_urls = [u for u in result.urls if not u.startswith("[")]
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errors = [u for u in result.urls if u.startswith("[")]
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return {
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"success": len(valid_urls) > 0,
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"images": valid_urls,
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"errors": errors,
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"prompt_used": prompt,
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"effective_prompt": result.effective_prompt,
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"negative_prompt": result.negative_prompt,
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"model_name": result.model_name,
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"model_id": result.model_id,
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}
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return {"success": False, "error": f"未知工具: {tool_name}"}
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