103 lines
3.1 KiB
Python
103 lines
3.1 KiB
Python
"""智能笑话生成器 API"""
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from datetime import datetime
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from fastapi import APIRouter, Depends, HTTPException
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from openai import OpenAI
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from sqlalchemy.orm import Session
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from app.database import get_db
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from app.models.setting import AiSetting
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from app.schemas.joke import GenerateRequest, GenerateResponse
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router = APIRouter(prefix="/generate", tags=["生成器"])
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# AI Prompt
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GENERATION_PROMPT = """你是一位幽默大师，专门创作轻松搞笑的短笑话。
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{context}
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要求：
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1. 根据场景和关键词创作一条原创笑话
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2. 笑话要有反转或意外结局
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3. 语言简洁，30-150字
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4. 直接输出笑话内容，不需要解释
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格式：
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标题：xxx
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内容：xxx
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"""
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def _build_prompt(scenarios: list[str], keywords: list[str]) -> str:
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"""构建 AI prompt"""
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parts = []
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if scenarios:
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parts.append(f"场景：{', '.join(scenarios)}")
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if keywords:
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parts.append(f"关键词：{', '.join(keywords)}")
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if not parts:
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parts.append("场景：日常生活的各种趣事（不指定具体场景）")
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return GENERATION_PROMPT.format(context="\n".join(parts))
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@router.post("", response_model=GenerateResponse)
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def generate_joke(
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req: GenerateRequest,
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db: Session = Depends(get_db),
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):
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"""调用 AI 生成笑话"""
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# 获取激活的 AI 配置
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setting = db.query(AiSetting).filter(AiSetting.is_active == True).first()
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if not setting:
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# 如果没有配置，尝试返回默认配置
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setting = db.query(AiSetting).first()
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if not setting or not setting.api_key:
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raise HTTPException(status_code=503, detail="AI 服务未配置，请联系管理员")
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# 调用 AI
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try:
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client = OpenAI(base_url=setting.api_base, api_key=setting.api_key)
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prompt = _build_prompt(req.scenarios, req.keywords)
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response = client.chat.completions.create(
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model=setting.model_name,
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messages=[{"role": "user", "content": prompt}],
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temperature=setting.temperature,
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max_tokens=setting.max_tokens,
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)
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raw = response.choices[0].message.content
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return _parse_response(raw)
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"生成失败: {str(e)}")
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def _parse_response(raw: str) -> GenerateResponse:
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"""解析 AI 返回内容，提取标题和内容"""
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title = ""
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content = raw
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# 尝试提取 "标题：xxx" 或 "标题:xxx"
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for line in raw.split("\n"):
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line = line.strip()
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if line.startswith("标题：") or line.startswith("标题:"):
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title = line.split("：", 1)[-1].split(":", 1)[-1].strip()
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content = content.replace(line, "").strip()
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break
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# 如果没有提取到标题，取第一行或前20字
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if not title:
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first_line = raw.split("\n")[0].strip()
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if first_line.startswith("标题"):
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first_line = first_line.split("：", 1)[-1].split(":", 1)[-1].strip()
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title = first_line[:30] if len(first_line) > 30 else first_line
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return GenerateResponse(
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title=title or "生成的笑话",
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content=content.strip(),
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created_at=datetime.now(),
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) |