ti-powerbar/app/views.py

from flask import render_template, Blueprint
from app.settings import powerbars, groups
from flask import jsonify
import telnetlib
import time
import app

routes = Blueprint('routes', __name__)

# Create a dictionary to store the active telnet connections
active_telnet_connections = {}

def get_telnet_connection(powerbar):
    """
    Get the active telnet connection for the given powerbar.
    If the connection does not exist, create a new one.

    Args:
        powerbar (str): The name of the powerbar.

    Returns:
        telnetlib.Telnet: The telnet connection object.
    """
    
    if powerbar in active_telnet_connections:
        return active_telnet_connections[powerbar]
    else:
        tn = telnetlib.Telnet(powerbars[powerbar]['host'], powerbars[powerbar]['port'])
        active_telnet_connections[powerbar] = tn
        return tn


def run_telnet_command(powerbar, command):
    try: 
        tn = get_telnet_connection(powerbar)
        tn.write(f"{command}\r\n".encode('ascii'))
        time.sleep(0.2)
        tn.write(f"{command}\r\n".encode('ascii'))
        return
    except Exception as e:
        print(f"Telnet error: {e}")
        if powerbar in active_telnet_connections:
            active_telnet_connections.pop(powerbar)
        tn = get_telnet_connection(powerbar)
        tn.write(f"{command}\r\n".encode('ascii'))
        time.sleep(0.2)
        tn.write(f"{command}\r\n".encode('ascii'))
        return


def find_group_by_name(name):
    for group in groups:
        if group["name"] == name:
            return group
    return None

def vaild_power_bar(powerbar):
    if powerbar in powerbars:
        return True
    else:
        return False

def vaild_outlet (powerbar, outlet):
    if outlet in powerbars[powerbar]['outlets']:
        return True
    else:
        return False

@routes.route('/')
def home():  
    for powerbar in powerbars:
        for outlet in powerbars[powerbar]['outlets']:
            powerbars[powerbar]['outlets'][outlet]['state'] = powerbars[powerbar]['outlets'][outlet].get('state', 'unknown')
    return render_template('index.html', powerbars=powerbars, all_groups=groups)



@routes.route('/<string:powerbar>/<int:outlet>/<string:action>')
def powerbar_control(powerbar, outlet, action):  
    """
    Controls the powerbar outlet based on the given parameters.

    Args:
        powerbar (str): The name of the powerbar.
        outlet (int): The outlet number.
        action (str): The action to perform on the outlet ('on', 'off', 'cycle').

    Returns:
        dict: A JSON response containing the state of the action or an error message.

    Raises:
        ValueError: If the action is not valid.
        ValueError: If the powerbar is not valid.
        ValueError: If the outlet is not valid.
        Exception: If there is a telnet error.

    """
    print(f"powerbar: {powerbar}")
    print(f"outlet: {outlet}")
    print(f"action: {action}")

    if not action in ['on', 'off', 'cycle', 'toggle']:
        print("Invalid action")
        return jsonify({'error': 'Invalid action'}), 400

    if not vaild_power_bar(powerbar):
        print("Invalid powerbar")
        return jsonify({'error': 'Invalid powerbar'}), 400

    if not vaild_outlet(powerbar, outlet):
        print("Invalid outlet")
        return jsonify({'error': 'Invalid outlet'}), 400

    if action in ['on', 'off']:
        try:
            print(f"Turning {action} powerbar {powerbar} outlet {outlet}")
            tn = get_telnet_connection(powerbar)
            run_telnet_command(powerbar,f"{action} {outlet}")
            powerbars[powerbar]['outlets'][outlet]['state'] = action
            app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')
            print(f"Turned {action} powerbar {powerbar} outlet {outlet}")
        except Exception as E:
            print(f"Telnet error: {E}")
            return jsonify({'error': 'Telnet error'}), 500

    if action == 'cycle':
        tn = get_telnet_connection(powerbar)
        print(f"Turning Off powerbar {powerbar} outlet {outlet}")
        run_telnet_command(powerbar,f"off {outlet}")
        powerbars[powerbar]['outlets'][outlet]['state'] = "off"
        app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')
        time.sleep(5)
        print(f"Turning On powerbar {powerbar} outlet {outlet}")
        run_telnet_command(powerbar,f"on {outlet}")
        powerbars[powerbar]['outlets'][outlet]['state'] = "on"
        app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')
    if action == 'toggle':
        print(powerbars[powerbar]['outlets'][outlet]['state'])
        
        if powerbars[powerbar]['outlets'][outlet]['state'] == "on":
            tn = get_telnet_connection(powerbar)
            print(f"Turning Off powerbar {powerbar} outlet {outlet}")
            run_telnet_command(powerbar,f"off {outlet}")
            powerbars[powerbar]['outlets'][outlet]['state'] = "off"
            app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')
        elif powerbars[powerbar]['outlets'][outlet]['state'] == "off":
            tn = get_telnet_connection(powerbar)
            print(f"Turning On powerbar {powerbar} outlet {outlet}")
            run_telnet_command(powerbar,f"on {outlet}")
            powerbars[powerbar]['outlets'][outlet]['state'] = "on"
            app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')

        return jsonify({'state': powerbars[powerbar]['outlets'][outlet].get('state', 'unknown')})


   
    return jsonify({'state': powerbars[powerbar]['outlets'][outlet].get('state', 'unknown')})


@routes.route('/<string:powerbar>/<int:outlet>/state')
def powerbar_state(powerbar, outlet):  
    print(f"powerbar: {powerbar}")
    print(f"outlet: {outlet}")

    if not vaild_power_bar(powerbar):
        print("Invalid powerbar")
        return jsonify({'error': 'Invalid powerbar'}), 400

    if not vaild_outlet(powerbar, outlet):
        print("Invalid outlet")
        return jsonify({'error': 'Invalid outlet'}), 400

    state = powerbars[powerbar]['outlets'][outlet].get('state', 'unknown')
    return jsonify({'state': state})


@routes.route('/powerbars')
def powerbars_list():  

    for powerbar in powerbars:
        for outlet in powerbars[powerbar]['outlets']:
            state = powerbars[powerbar]['outlets'][outlet].get('state', 'unknown')
            powerbars[powerbar]['outlets'][outlet]['state'] = state
            powerbars[powerbar]['outlets'][outlet]['on_url'] =  f"/{powerbar}/{outlet}/on"
            powerbars[powerbar]['outlets'][outlet]['off_url'] = f"/{powerbar}/{outlet}/off"
            powerbars[powerbar]['outlets'][outlet]['state_url'] = f"/{powerbar}/{outlet}/state"
            powerbars[powerbar]['outlets'][outlet]['cycle_url'] = f"/{powerbar}/{outlet}/cycle" 
            powerbars[powerbar]['outlets'][outlet]['toggle_url'] =  f"/{powerbar}/{outlet}/toggle"
    return jsonify(powerbars)



@routes.route('/groups/<string:group>/<string:action>')
def powebar_group_action(group, action): 

    if not action in ['on', 'off', 'cycle']:
        print("Invalid action")
        return jsonify({'error': 'Invalid action'}), 400


    group = find_group_by_name(group)

    if not group:
        print("Invalid group")
        return jsonify({'error': 'Invalid group'}), 400

    if action in ['on', 'off']:
        try: 
            for device in group["devices"]:
                powerbar = device["powerbar"]
                tn = get_telnet_connection(powerbar)
                print(f"Powerbar: {powerbar}")
                outlets = ",".join([str(x) for x in device['outlets']])
                print(f"Turning {action} powerbar {powerbar} outlet {outlets}")
                run_telnet_command(powerbar,f"{action} {outlets}")
                for outlet in device['outlets']:
                    if outlet in powerbars[powerbar]['outlets']:
                        powerbars[powerbar]['outlets'][outlet]['state'] = action
                        app.socketio.emit('power-event',{'powerbar': powerbar, 'outlet' : outlet, 'action' : action}, namespace='/powerupdates')
                        print(f"Turned {action} powerbar {powerbar} outlet {outlet}")

            return jsonify({'status': "200"})
        except Exception as E:
            print(f"Telnet error: {E}")
            return jsonify({'error': 'Telnet error'}), 500

@routes.route('/groups')
def powebar_groups(): 

    try: 
        for group in groups:
            group['on_url'] = f"/groups/{group['name']}/on"
            group['off_url'] = f"/groups/{group['name']}/off"
        return jsonify(groups)
    except Exception as E:
        print(f"Telnet error: {E}")
        return jsonify({'error': 'no groups defined for powerbar'}), 404