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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 | # api/courseware/vision_builder.py
"""
Course Vision & Structure Builder：课程定位、学习目标、层级化知识树。
"""
from typing import Optional, List, Tuple
from api.config import client, DEFAULT_MODEL, USE_WEAVIATE
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 COURSE_VISION_SYSTEM, COURSE_VISION_USER_TEMPLATE
def build_course_vision(
course_info: str,
syllabus: str,
max_tokens: int = 2000,
history: Optional[list] = None,
) -> str:
"""
输入：课程基本信息 + 教学大纲。
输出：课程定位、学习目标、层级化知识树；含 References。
"""
query = f"{course_info}\n{syllabus}"[: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 = COURSE_VISION_USER_TEMPLATE.format(
course_info=course_info.strip() or "（未提供）",
syllabus=syllabus.strip() or "（未提供）",
rag_context=rag_context or "（无检索到知识库摘录，将基于通用课程设计经验回答。）",
ref_instruction=ref_instruction,
)
messages = [{"role": "system", "content": COURSE_VISION_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=90,
)
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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