Mabasej_Team/main.py

from fastapi import FastAPI, Request
from pydantic import BaseModel
import engine
import requests
import time
import json
import threading

app = FastAPI()

sensors = {
    "teplota": 24,
    "vlhkosť": 25,
    "počet ľudí": 10,
    "doba čakania": 2
}
log = engine.Log(print_m=True, debug=True)

time_to_heartbeat = 60 #Seconds
location = "2"
ID = 2
IP = "192.168.1.99"
filesystem = {
    "otvaracie_hod": ["t", {"pon": "10-25"}, {"uto": "10-25"}],
    "prehliadka": ["pdf", "/files/prehliadka.pdf"],
    "fotky_hrad": ["png_z", ["/files/hrad1.png", "/files/hrad2.png"]]
}
heartbeat_table = {
    "ID": [1],
    "IP": ["192.168.1.231"],
    "location": ["1"],
    "file_system": ["x"],
    "last_heartbeat": [7]
}
heartbeat_table["ID"].append(ID)
heartbeat_table["IP"].append(IP)
heartbeat_table["location"].append(location)
heartbeat_table["file_system"].append(filesystem)
heartbeat_table["last_heartbeat"].append(time_to_heartbeat)
# Todo better "host" ID handeling

class Server_table(BaseModel):
    ID: list
    IP: list
    location: list
    file_system: list
    last_heartbeat: list


@app.post("/heartbeat")
def heartbeat(s_table: Server_table, request: Request):
    log.message(f"heartbeat requested: {request.client.host}:{request.client.port}")
    log.debug(f"Recieved server table: {s_table}")
    try:
        for position, server_id in enumerate(s_table.ID):
            if server_id in heartbeat_table["ID"]:
                if heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(server_id)] < \
                        s_table.last_heartbeat[position]:
                    heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(server_id)] = s_table.last_heartbeat[
                        position]
                    log.debug(f"updated {server_id}`s heartbeat to {s_table.last_heartbeat[position]}")
                    #Todo update filesystem too. Now updating only last heartbeat
            elif server_id == ID:
                log.debug(f"Updated my heartbeat from {s_table.last_heartbeat[position]} to {time_to_heartbeat}")
                heartbeat_table["last_heartbeat"][heartbeat_table["ID"].index(ID)] = time_to_heartbeat
            else:
                heartbeat_table["ID"].append(s_table.ID[position])
                heartbeat_table["IP"].append(s_table.IP[position])
                heartbeat_table["location"].append(s_table.location[position])
                heartbeat_table["file_system"].append(s_table.file_system[position])
                heartbeat_table["last_heartbeat"].append(s_table.last_heartbeat[position])
    except Exception as error:
        log.error(f"heartbeat > {error}")
    return heartbeat_table, {"ID": ID, "file_system": filesystem, "location": location}


@app.get("/sensors")
def get_sensors(request: Request):
    log.message(f"sensor data sent to {request.client.host}:{request.client.port}")
    log.debug(f"sensor data: {sensors}")
    return sensors


@app.get("/files/{file}")
def get_file(file: str):
    pass
    #Todo Get files function for client (phone/ther rpi)


def send_heartbeat(ip):
    log.message(f"requesting heartbeat from {ip}")
    cache_request = requests.post(f"http://{ip}:8000/heartbeat", data=json.dumps(heartbeat_table))
    log.debug(json.dumps(cache_request.json(), indent=4))


def mainloop():
    while True:
        for device_number, device_ID in enumerate(heartbeat_table["ID"]):
            if device_ID != ID:
                if heartbeat_table["last_heartbeat"][device_number] < 0:
                    send_heartbeat(heartbeat_table["IP"][device_number])
                    heartbeat_table["last_heartbeat"][device_number] = time_to_heartbeat + 5
                print(f"""{device_ID} : time to heartbeat : {heartbeat_table["last_heartbeat"][device_number]}""")
                heartbeat_table["last_heartbeat"][device_number] -= 1
        time.sleep(1)

thread_1 = threading.Thread(target=mainloop, daemon=True)
thread_1.start()