ti-powerbar/app/utils.py

import telnetlib
import re
from app.settings import powerbars, groups

def check_input_error(tn):
    tn.write("/\r\n".encode('ascii'))
    for _ in range(3):
        print(f"Checking for input error attempt {_}")
        output = tn.read_until(b"Input error", timeout=3).decode('ascii')
        if "Input error" in output:
            return True
    return False


def get_telnet_connection(powerbar):
    tn = telnetlib.Telnet(powerbars[powerbar]['host'], powerbars[powerbar]['port'])
    return tn


def run_telnet_command(powerbar, command):
    try: 
        tn = get_telnet_connection(powerbar)
        
        if check_input_error(tn):
            tn.write(f"{command}\r\n".encode('ascii'))
            tn.close()
            return True
        tn.close()
        return False
    except Exception as e:
        print(f"Run Telnet Command Rrror: {e}")
        return False


def get_baytech_status_outlet_telnet(powerbar):
    try: 
        # Create a Telnet object and connect to the host
        tn = telnetlib.Telnet(powerbars[powerbar]['host'], powerbars[powerbar]['port'])
        # Send the command you want to execute
        command = "status"

        if check_input_error(tn):
            tn.write(command.encode('ascii') + b"\r\n")
        else:
            tn.close()
            return None
        # Read the output until you receive the prompt or a timeout occurs
        output = tn.read_until(b"<prompt>", timeout=5).decode('ascii')
        # Close the Telnet connection
        tn.close()

        pattern = r"(\d+)\)\.\.\.Outlet\s+(\d+)\s+:\s+(\w+)"
        outlets = {}
        matches = re.findall(pattern, output)
        for match in matches:
            number = int(match[1])
            status = match[2]
            outlets[number] =  status

        return outlets
    except:
        return None