344 lines
10 KiB
Python
344 lines
10 KiB
Python
from fastapi import FastAPI, HTTPException, Query, Form, Depends
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from fastapi.staticfiles import StaticFiles
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from fastapi.responses import HTMLResponse, RedirectResponse, JSONResponse
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import logging
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import os
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from fastapi import Request, APIRouter
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import platform
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from fastapi.templating import (
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Jinja2Templates,
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) # pip install fastapi uvicorn jinja2 python-multipart passlib
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from starlette.middleware.sessions import SessionMiddleware
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from starlette.exceptions import HTTPException as StarletteHTTPException
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from starlette.status import HTTP_302_FOUND
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import json
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from pathlib import Path
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from typing import Optional, Dict, Any
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from fastapi import Query
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import asyncio
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import datetime
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from valveBackend import ValveBackend
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import csv
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from collections import deque
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import numpy as np
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import aiohttp
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if platform.system() in ["Darwin"]: # macOS or Windows
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from MockCAN import CANBackend
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logging.basicConfig(level=logging.INFO)
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else:
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from classCAN import CANBackend # Your real backend
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logging.basicConfig(level=logging.ERROR)
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app = FastAPI()
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app.add_middleware(SessionMiddleware, secret_key="your_super_secret_key")
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router = APIRouter()
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templates = Jinja2Templates(directory="templates")
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can_backend = CANBackend()
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valve_backend = ValveBackend(eds_file="/home/hmi/Desktop/HMI/eds_file/inletvalveboard.eds")
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# Serve static files (HTML, JS, CSS)
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app.mount("/static", StaticFiles(directory="static"), name="static")
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## BUFFER CREATION AND HELPER
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# Global object to store the latest data
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latest_data: Dict[str, Any] = {"PU_1": None, "PU_2": None, "PU_3": None, "PatientSkid" : {"QSkid":0.0}}
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# RECORDER
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recording_flag = False
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recording_task = None
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recording_writer = None
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recording_file = None
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write_buffer = deque()
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flush_interval = 1.0 # flush every 1 second
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last_flush_time = datetime.datetime.now()
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## LOGGING QSkid
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async def update_latest_flow():
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async with aiohttp.ClientSession() as session:
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while True:
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try:
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async with session.get("http://192.168.1.28:8000/instant_flow") as resp:
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data = await resp.json()
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latest_flow = int(data["log"]["flow"])
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logging.debug(f"Updated flow: {latest_flow}")
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latest_data["PatientSkid"]["QSkid"] = latest_flow
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except Exception as e:
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logging.error(f"Error fetching flow: {e}")
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await asyncio.sleep(1.0)
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def format_data(data):
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return {
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"timestamp": datetime.datetime.now().isoformat(),
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"Qperm": data.get("FM2", 0.0),
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"Qdilute": data.get("FM1", 0.0),
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"Qdrain": data.get("FM4", 0.0),
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"Qrecirc": data.get("FM3", 0.0),
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"Pro": data.get("PS1", 0.0),
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"Pdilute": data.get("PS3", 0.0),
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"Prentate": data.get("PS2", 0.0),
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"Conductivity": data.get("Cond", 0.0),
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"MV02": data.get("MV02", 0.0),
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"MV02_sp": data.get("MV02_sp", 0.0),
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"MV03": data.get("MV03", 0.0),
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"MV03_sp": data.get("MV03_sp", 0.0),
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"MV04": data.get("MV05", 0.0),
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"MV04_sp": data.get("MV05_sp", 0.0),
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"MV05": data.get("MV05", 0.0),
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"MV05_sp": data.get("MV05_sp", 0.0),
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"MV06": data.get("MV06", 0.0),
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"MV06_sp": data.get("MV06_sp", 0.0),
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"MV07": data.get("MV07", 0.0),
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"MV07_sp": data.get("MV07_sp", 0.0),
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"MV08": data.get("MV08", 0.0),
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"MV08_sp": data.get("MV08_sp", 0.0),
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}
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# CREDENTIALS
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# Load users from JSON file at startup
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CREDENTIAL_PATH = Path("credentials.json")
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if CREDENTIAL_PATH.exists():
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with CREDENTIAL_PATH.open("r") as f:
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CREDENTIALS = json.load(f)
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else:
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CREDENTIALS = {}
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USERNAME = CREDENTIALS["username"]
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PASSWORD = CREDENTIALS["password"]
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# ======== LOGIN & SESSION HANDLING ========
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def require_login(request: Request):
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user = request.session.get("user")
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if user != USERNAME:
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# raise 302 to trigger redirection manually (FastAPI doesn't support redirects from Depends directly)
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raise StarletteHTTPException(status_code=302, detail="Redirect to login")
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return user
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@app.get("/", response_class=HTMLResponse)
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def login_form(request: Request):
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return templates.TemplateResponse("login.html", {"request": request})
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@app.post("/login")
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def login(request: Request, username: str = Form(...), password: str = Form(...)):
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if username == USERNAME and password == PASSWORD:
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request.session["user"] = username
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return RedirectResponse("/control", status_code=HTTP_302_FOUND)
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return templates.TemplateResponse(
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"login.html", {"request": request, "error": "Invalid credentials.json"}
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)
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@app.get("/logout")
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def logout(request: Request):
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request.session.clear()
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return RedirectResponse("/", status_code=HTTP_302_FOUND)
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# ======== PROTECTED INTERFACE ========
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@app.get("/control", response_class=HTMLResponse)
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def control_page(request: Request):
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if request.session.get("user") != USERNAME:
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return RedirectResponse("/", status_code=HTTP_302_FOUND)
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return templates.TemplateResponse("control.html", {"request": request})
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@app.get("/monitor-page", response_class=HTMLResponse)
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def monitor_page(request: Request):
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with open("static/monitor.html") as f:
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return HTMLResponse(f.read())
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# ======== CAN + BACKEND ROUTES ========
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@app.post("/connect_toggle")
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def connect_toggle():
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logging.info("Toggling CAN connection...")
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if can_backend.connected:
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can_backend.shutdown()
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return {"connected": False}
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else:
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success = can_backend.connect()
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try:
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valve_backend.connect()
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except Exception as e:
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print(f"Connection error : {e}")
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if not success:
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raise HTTPException(status_code=500, detail="Connection failed.")
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return {"connected": True}
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@app.post("/command/{state}/pu/{pu_number}")
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def send_command(state: str, pu_number: int, ploop_setpoint: float = Query(...)):
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VALID_STATES = {
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"IDLE",
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"PRE-PRODUCTION",
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"PRODUCTION",
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"FIRST_START",
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"THERMALLOOPCLEANING",
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"DISINFECTION",
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"SLEEP",
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}
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state = state.upper()
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if state not in VALID_STATES:
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raise HTTPException(status_code=400, detail=f"Invalid state '{state}'")
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logging.info(f"Sending state '{state}' to PU {pu_number}")
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try:
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can_backend.send_state_command(state, pu_number, ploop_setpoint)
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current_state = can_backend.read_current_state(pu_number)
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return {
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"status": "success",
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"command": state,
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"pu": pu_number,
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"ploop_setpoint": ploop_setpoint,
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"current_state": current_state,
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}
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except Exception as e:
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raise HTTPException(status_code=500, detail=str(e))
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@app.get("/api/pu_status")
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def get_pu_status():
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states = {
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"PU1": can_backend.read_current_state(1),
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"PU2": can_backend.read_current_state(2),
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"PU3": can_backend.read_current_state(3),
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}
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logging.info(f"[PU STATUS] {states}")
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return JSONResponse(content=states)
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async def update_latest_data():
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while True:
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for pu in [1, 2]: # TODO: REPLACE THIS WITH CONNECTED PUs, IS GET PU STATUS SLOW?
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data = can_backend.get_latest_data(pu_number=pu)
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latest_data[f"PU_{pu}"] = format_data(data)
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current_data = latest_data[f"PU_{pu}"]
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logging.debug(f"[MONITOR BUFFER] PU{pu}: {current_data}")
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# logging.info(f"[MONITOR BUFFER] latest_data: {latest_data}")
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await asyncio.sleep(0.1)
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@app.get("/monitor")
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async def get_monitor_data(pu_number: Optional[float] = Query(None)):
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print(f"pu_number is {pu_number}")
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if pu_number is not None:
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return latest_data.get(f"PU_{pu_number}", {})
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else:
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# print(latest_data)
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return latest_data
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@app.on_event("startup")
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async def startup_event():
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asyncio.create_task(update_latest_data())
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asyncio.create_task(update_latest_flow())
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@app.get("/can_status")
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def can_status():
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"""Return current CAN connection status."""
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return {"connected": can_backend.connected}
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@app.post("/command/feed_valve")
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def feedvalve_control(MV01_opening: int = Query(...)):
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"""Control MV01 feed valve"""
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valve_backend.send_command(MV01_opening)
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logging.info(f"Feed valve opening to {MV01_opening}")
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return {"status": "ok"}
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#LOCAL RECORDER
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@app.post("/start_recording")
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async def start_recording():
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global recording_flag, recording_task, recording_file, recording_writer
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if recording_flag:
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raise HTTPException(status_code=400, detail="Already recording.")
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now = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
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filename = f"recording_{now}.csv"
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os.makedirs("recordings", exist_ok=True)
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filepath = os.path.join("recordings", filename)
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recording_file = open(filepath, "w", newline="")
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fieldnames = ["timestamp", "pu", "QSkid"] + list(format_data({}).keys())
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recording_writer = csv.DictWriter(recording_file, fieldnames=fieldnames)
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recording_writer.writeheader()
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recording_flag = True
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recording_task = asyncio.create_task(record_data_loop())
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logging.info(f"[RECORDING STARTED] File: {filepath}")
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return {"status": "recording started", "file": filename}
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@app.post("/stop_recording")
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async def stop_recording():
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global recording_flag, recording_task, recording_file
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if not recording_flag:
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raise HTTPException(status_code=400, detail="Not recording.")
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recording_flag = False
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if recording_task:
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await recording_task
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recording_task = None
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if recording_file:
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recording_file.close()
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recording_file = None
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logging.info("[RECORDING STOPPED]")
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return {"status": "recording stopped"}
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async def record_data_loop():
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global recording_writer, recording_file, write_buffer, last_flush_time
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while recording_flag:
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timestamp = datetime.datetime.now().isoformat()
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for pu, data in latest_data.items():
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if data:
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print("record_data",data)
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row = {
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"timestamp": timestamp,
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"pu": pu,
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**data
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}
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recording_writer.writerow(row)
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# Flush every flush_interval seconds
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if (datetime.datetime.now() - last_flush_time).total_seconds() >= flush_interval:
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recording_file.flush()
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last_flush_time = datetime.datetime.now()
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await asyncio.sleep(0.1) # 10 Hz
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app.include_router(router)
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if __name__ == "__main__":
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import uvicorn
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uvicorn.run(
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"main:app",
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host="127.0.0.1",
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port=8080,
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reload=True,
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reload_dirs=["."],
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)
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