244 lines
7.1 KiB
Python
244 lines
7.1 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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if platform.system() in ["Darwin"]: # macOS or Windows
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from MockCAN import CANBackend
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else:
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from classCAN import CANBackend # Your real backend
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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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logging.basicConfig(level=logging.INFO)
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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}
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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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"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, 3]:
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data = can_backend.get_latest_data(pu_number=pu)
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logging.info(f"[MONITOR BUFFER] PU{pu}: {data}")
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latest_data[f"PU_{pu}"] = format_data(data)
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await asyncio.sleep(0.2) # Update every 100ms
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@app.get("/monitor")
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async def get_monitor_data(pu_number: Optional[int] = Query(None)):
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logging.info(f"[MONITOR DATA QUERY] {pu_number}")
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if pu_number:
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return latest_data.get(f"PU_{pu_number}", {})
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else:
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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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@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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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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