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| 1 | +from fastapi import FastAPI, UploadFile, File, Depends, HTTPException, Form |
| 2 | +from fastapi.middleware.cors import CORSMiddleware |
| 3 | +from sqlalchemy import create_engine, Column, Integer, String, Date, Text, func |
| 4 | +from sqlalchemy.orm import sessionmaker, declarative_base, Session |
| 5 | +from pydantic import BaseModel |
| 6 | +from datetime import date |
| 7 | +import os, shutil |
| 8 | +from dotenv import load_dotenv |
| 9 | +import requests |
| 10 | + |
| 11 | +# Optional OpenAI |
| 12 | +try: |
| 13 | + from openai import OpenAI |
| 14 | +except Exception: |
| 15 | + OpenAI = None |
| 16 | + |
| 17 | +load_dotenv() |
| 18 | + |
| 19 | +DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./app.db") |
| 20 | +engine = create_engine(DATABASE_URL, pool_pre_ping=True) |
| 21 | +SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine) |
| 22 | +Base = declarative_base() |
| 23 | + |
| 24 | +class Task(Base): |
| 25 | + __tablename__ = "tasks" |
| 26 | + id = Column(Integer, primary_key=True, index=True) |
| 27 | + title = Column(String(255), nullable=False) |
| 28 | + department = Column(String(100), nullable=True) |
| 29 | + assignee = Column(String(100), nullable=True) |
| 30 | + status = Column(String(50), nullable=False, default="Pending") |
| 31 | + due_date = Column(Date, nullable=True) |
| 32 | + priority = Column(String(20), nullable=True) |
| 33 | + remarks = Column(Text, nullable=True) |
| 34 | + attachment = Column(String(255), nullable=True) |
| 35 | + |
| 36 | +class AuditLog(Base): |
| 37 | + __tablename__ = "audit_logs" |
| 38 | + id = Column(Integer, primary_key=True) |
| 39 | + action = Column(String(50)) |
| 40 | + detail = Column(Text) |
| 41 | + |
| 42 | +Base.metadata.create_all(bind=engine) |
| 43 | + |
| 44 | +def get_db(): |
| 45 | + db = SessionLocal() |
| 46 | + try: |
| 47 | + yield db |
| 48 | + finally: |
| 49 | + db.close() |
| 50 | + |
| 51 | +app = FastAPI(title="FAT-EIBL (Edme) – API") |
| 52 | + |
| 53 | +allow = os.getenv("ALLOW_ORIGINS", "*").split(",") |
| 54 | +app.add_middleware( |
| 55 | + CORSMiddleware, |
| 56 | + allow_origins=allow, |
| 57 | + allow_credentials=True, |
| 58 | + allow_methods=["*"], |
| 59 | + allow_headers=["*"], |
| 60 | +) |
| 61 | + |
| 62 | +# Models |
| 63 | +class TaskCreate(BaseModel): |
| 64 | + title: str |
| 65 | + department: str | None = None |
| 66 | + assignee: str | None = None |
| 67 | + status: str = "Pending" |
| 68 | + due_date: date | None = None |
| 69 | + priority: str | None = None |
| 70 | + remarks: str | None = None |
| 71 | + |
| 72 | +class TaskOut(BaseModel): |
| 73 | + id: int |
| 74 | + title: str |
| 75 | + department: str | None |
| 76 | + assignee: str | None |
| 77 | + status: str |
| 78 | + due_date: date | None |
| 79 | + priority: str | None |
| 80 | + remarks: str | None |
| 81 | + attachment: str | None |
| 82 | + class Config: |
| 83 | + from_attributes = True |
| 84 | + |
| 85 | +# Health |
| 86 | +@app.get("/health") |
| 87 | +def health(): return { "status": "ok" } |
| 88 | + |
| 89 | +# Tasks CRUD |
| 90 | +@app.get("/tasks", response_model=list[TaskOut]) |
| 91 | +def list_tasks(db: Session = Depends(get_db)): |
| 92 | + return db.query(Task).order_by(Task.due_date.is_(None), Task.due_date).all() |
| 93 | + |
| 94 | +@app.post("/tasks", response_model=TaskOut) |
| 95 | +def create_task(task: TaskCreate, db: Session = Depends(get_db)): |
| 96 | + obj = Task(**task.dict()) |
| 97 | + db.add(obj) |
| 98 | + db.add(AuditLog(action="create", detail=f"Task: {obj.title}")) |
| 99 | + db.commit() |
| 100 | + db.refresh(obj) |
| 101 | + return obj |
| 102 | + |
| 103 | +@app.put("/tasks/{task_id}", response_model=TaskOut) |
| 104 | +def update_task(task_id: int, task: TaskCreate, db: Session = Depends(get_db)): |
| 105 | + obj = db.get(Task, task_id) |
| 106 | + if not obj: raise HTTPException(status_code=404, detail="Task not found") |
| 107 | + for k, v in task.dict().items(): setattr(obj, k, v) |
| 108 | + db.add(AuditLog(action="update", detail=f"Task ID {task_id}")) |
| 109 | + db.commit(); db.refresh(obj) |
| 110 | + return obj |
| 111 | + |
| 112 | +@app.delete("/tasks/{task_id}") |
| 113 | +def delete_task(task_id: int, db: Session = Depends(get_db)): |
| 114 | + obj = db.get(Task, task_id) |
| 115 | + if not obj: raise HTTPException(status_code=404, detail="Task not found") |
| 116 | + db.delete(obj); db.add(AuditLog(action="delete", detail=f"Task ID {task_id}")) |
| 117 | + db.commit(); return { "ok": True } |
| 118 | + |
| 119 | +# Uploads |
| 120 | +UPLOAD_DIR = os.path.join(os.getcwd(), "uploads"); os.makedirs(UPLOAD_DIR, exist_ok=True) |
| 121 | + |
| 122 | +@app.post("/upload/{task_id}") |
| 123 | +async def upload_file(task_id: int, file: UploadFile = File(...), db: Session = Depends(get_db)): |
| 124 | + obj = db.get(Task, task_id) |
| 125 | + if not obj: raise HTTPException(status_code=404, detail="Task not found") |
| 126 | + safe_name = f"task_{task_id}_" + os.path.basename(file.filename) |
| 127 | + dest = os.path.join(UPLOAD_DIR, safe_name) |
| 128 | + with open(dest, "wb") as buffer: shutil.copyfileobj(file.file, buffer) |
| 129 | + obj.attachment = safe_name |
| 130 | + db.add(AuditLog(action="upload", detail=f"Task ID {task_id} file {safe_name}")) |
| 131 | + db.commit() |
| 132 | + return { "task_id": task_id, "filename": safe_name } |
| 133 | + |
| 134 | +# Seed |
| 135 | +@app.get("/seed") |
| 136 | +def seed(db: Session = Depends(get_db)): |
| 137 | + if db.query(Task).count() == 0: |
| 138 | + for t in [ |
| 139 | + Task(title="IRDAI Filing Q3", department="Compliance", assignee="Darpan", status="Pending", priority="High"), |
| 140 | + Task(title="Statutory Audit FY 24-25", department="Accounts", assignee="Priya", status="In Progress", priority="High"), |
| 141 | + Task(title="Investment Reconciliation", department="Ops", assignee="Rakesh", status="Pending", priority="Medium"), |
| 142 | + ]: |
| 143 | + db.add(t) |
| 144 | + db.add(AuditLog(action="seed", detail="Sample tasks added")) |
| 145 | + db.commit() |
| 146 | + return { "seeded": True } |
| 147 | + |
| 148 | +# AI Chat (proxy to OpenAI if key provided) |
| 149 | +@app.post("/ai/chat") |
| 150 | +def ai_chat(prompt: str = Form(...)): |
| 151 | + api_key = os.getenv("OPENAI_API_KEY", "") |
| 152 | + if not api_key or OpenAI is None: |
| 153 | + return { "reply": "AI is not configured. Please set OPENAI_API_KEY in backend/.env." } |
| 154 | + client = OpenAI(api_key=api_key) |
| 155 | + try: |
| 156 | + resp = client.chat.completions.create( |
| 157 | + model="gpt-4o-mini", |
| 158 | + messages=[{"role":"system","content":"You are Vani, an AI assistant for an audit tracker."}, |
| 159 | + {"role":"user","content":prompt}] |
| 160 | + ) |
| 161 | + return { "reply": resp.choices[0].message.content } |
| 162 | + except Exception as e: |
| 163 | + return { "reply": f"AI error: {e}" } |
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