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0cde401 6a91b07 0cde401 6a91b07 0cde401 6a91b07 0cde401 6a91b07 0cde401 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | # api/courseware/content_generator.py
"""
Content Generator：生成 Markdown 详细教案，并导出可用于生成 PPT 的结构化数据。
"""
from typing import Optional, List, Tuple
from api.config import client, DEFAULT_MODEL
from api.courseware.rag import get_rag_context_with_refs, inject_refs_instruction
from api.courseware.references import append_references_to_content
from api.courseware.prompts import CONTENT_GENERATOR_SYSTEM, CONTENT_GENERATOR_LESSON_PLAN_TEMPLATE
def generate_lesson_plan_and_ppt_data(
topic: str,
duration: Optional[str] = None,
outline_points: Optional[str] = None,
max_tokens: int = 2800,
history: Optional[list] = None,
) -> str:
"""
生成 Markdown 详细教案 + 可用于 PPT 的结构化数据（每页 title、bullets、speaker_notes）。
"""
query = f"{topic}\n{outline_points or ''}"[:2000]
rag_context, refs = get_rag_context_with_refs(query, top_k=8, max_context_chars=5000)
ref_instruction = inject_refs_instruction(refs)
user_content = CONTENT_GENERATOR_LESSON_PLAN_TEMPLATE.format(
topic=topic.strip() or "（未提供主题）",
duration=(duration or "1 课时").strip(),
outline_points=(outline_points or "（未提供，请根据主题生成）").strip(),
rag_context=rag_context or "（无检索到知识库摘录。）",
ref_instruction=ref_instruction,
)
messages = [{"role": "system", "content": CONTENT_GENERATOR_SYSTEM}]
if history:
for user_msg, assistant_msg in history[-10:]:
if user_msg:
messages.append({"role": "user", "content": user_msg})
if assistant_msg:
messages.append({"role": "assistant", "content": assistant_msg})
messages.append({"role": "user", "content": user_content})
try:
resp = client.chat.completions.create(
model=DEFAULT_MODEL,
messages=messages,
temperature=0.4,
max_tokens=max_tokens,
timeout=120,
)
out = (resp.choices[0].message.content or "").strip()
except Exception as e:
out = f"生成失败：{e}。请稍后重试。"
if refs and "## References" not in out and "[Source:" not in out:
out = append_references_to_content(out, refs)
return out
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