from pathlib import Path from fastapi import APIRouter from fastapi.responses import HTMLResponse, Response from jinja2 import Environment, FileSystemLoader from pydantic import BaseModel,Field, field_validator from typing import Literal from weasyprint import HTML from app.preview import build_course_preview from app.supabase import supabase router=APIRouter() templates=Environment(loader=FileSystemLoader("app/templates")) FRONTEND_DIR=Path(__file__).resolve().parent/"templates" class CourseSubmission(BaseModel): faculty_email: str=Field(min_length=3, max_length=254) course_title: str=Field(min_length=3, max_length=150) offering_department: Literal["MA", "CS", "UZ"] target_department: Literal["CSE", "ECE", "ME", "BT", "EEE", "AIML"] semester: Literal["1", "2", "3", "4", "5", "6", "7", "8"] credit_category: Literal["0", "2", "4", "5"] raw_course_content: str=Field(min_length=50) text_books: str=Field(min_length=5) reference_books: str="" preferred_tools: str="" @field_validator("faculty_email","course_title","raw_course_content","text_books","reference_books","preferred_tools",mode="before") @classmethod def strip(cls, v): return v.strip() if isinstance(v, str) else v @router.post("/submissions") def receive(data: CourseSubmission): d=data.model_dump() d["status"]="pending" r=supabase.table("submissions").insert(d).execute() return {"message":"Submission Received!","submission":r.data[0]} @router.get("/preview/semester/{sem}/courses") def list_courses(sem:str): r=supabase.table("refined_submissions").select("id").execute() return {"course_ids":[row["id"] for row in r.data]} @router.get("/preview/course/{refined_id}") def preview_course(refined_id:int): r=supabase.table("refined_submissions").select("*").eq("id",refined_id).single().execute() course=build_course_preview(r.data) return HTMLResponse(templates.get_template("jinja_sample.html").render(course=course,curriculum_year="2025-2026",page_number="")) @router.get("/preview/semester/{sem}/pdf") def download_pdf(sem:str): r=supabase.table("refined_submissions").select("id").execute() ids=[row["id"] for row in r.data] style="" bodies=[] for i,rid in enumerate(ids,1): r=supabase.table("refined_submissions").select("*").eq("id",rid).single().execute() h=templates.get_template("jinja_sample.html").render(course=build_course_preview(r.data),curriculum_year="2025-2026",page_number=str(i)) if not style: s1=h.find("")+8 style=h[s1:e1] s2=h.find("",s2)+8 style+=h[s2:e2] bs=h.find(">",h.find("") cls="page-break" if i>1 else "" bodies.append(f"

{h[bs:be]}

"if cls else h[bs:be]) combined=f"""{style}{"".join(bodies)}""" pdf=HTML(string=combined,base_url=str(FRONTEND_DIR)).write_pdf() return Response(content=pdf,media_type="application/pdf",headers={"Content-Disposition":f"attachment;filename=semester-{sem}.pdf"})