FreeDATA/modem/server.py

from flask import Flask, request, jsonify, make_response
from flask_sock import Sock
from flask_cors import CORS
import os
import serial_ports
from config import CONFIG
import audio
import queue
import server_commands
import service_manager
import state_manager
import threading
import ujson as json

app = Flask(__name__)
CORS(app)
CORS(app, resources={r"/*": {"origins": "*"}})
sock = Sock(app)
app.config['SOCK_SERVER_OPTIONS'] = {'ping_interval': 5}
print(app.config)
print(app.config['SOCK_SERVER_OPTIONS'])
# set config file to use
def set_config():
    if 'FREEDATA_CONFIG' in os.environ:
        config_file = os.environ['FREEDATA_CONFIG']
    else:
        config_file = 'config.ini'

    if os.path.exists(config_file):
        print(f"Using config from {config_file}")
    else:
        print(f"Config file '{config_file}' not found. Exiting.")
        exit(1)

    app.config_manager = CONFIG(config_file)

set_config()

# start modem
app.state_queue = queue.Queue() # queue which holds latest states
app.modem_events = queue.Queue() # queue which holds latest events
app.modem_fft = queue.Queue() # queue which holds latest fft data
app.modem_service = queue.Queue() # start / stop modem service

# init state manager
app.states = state_manager.STATES(app.state_queue)

# start service manager
service_manager.SM(app)

# start modem service
app.modem_service.put("start")

# returns a standard API response
def api_response(data):
    return make_response(jsonify(data), 200)


## REST API
@app.route('/', methods=['GET'])
def index():
    return api_response({'name': 'FreeDATA API',
                    'description': '',
                    'api_version': 1,
                    'license': 'GPL3.0',
                    'documentation': 'https://wiki.freedata.app',
                    })

# get and set config
@app.route('/config', methods=['GET', 'POST'])
def config():
    if request.method in ['POST']:
        set_config = app.config_manager.write(request.json)
        app.modem_service.put("restart")
        if not set_config:
            response = api_response(None, 'error writing config')
        else:
            response = api_response(set_config)
        return response
    elif request.method == 'GET':
        return api_response(app.config_manager.read())

@app.route('/devices/audio', methods=['GET'])
def get_audio_devices():
    dev_in, dev_out = audio.get_audio_devices()
    devices = { 'in': dev_in, 'out': dev_out }
    return api_response(devices)

@app.route('/devices/serial', methods=['GET'])
def get_serial_devices():
    devices = serial_ports.get_ports()
    return api_response(devices)

@app.route('/modem/state', methods=['GET'])
def get_modem_state():
    return api_response(app.states.sendState())

@app.route('/modem/cqcqcq', methods=['POST', 'GET'])
def post_cqcqcq():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for triggering a CQ via POST"})
    if app.states.is_modem_running:
        server_commands.cqcqcq()
    return api_response({"cmd": "cqcqcq"})

@app.route('/modem/beacon', methods=['POST'])
def post_beacon():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for controlling BEACON STATE via POST"})
    if app.states.is_modem_running:
        server_commands.beacon(request.json)
    return api_response(request.json)

@app.route('/modem/ping_ping', methods=['POST'])
def post_ping():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for controlling PING via POST"})
    if app.states.is_modem_running:
        server_commands.ping_ping(request.json)
    return api_response(request.json)

@app.route('/modem/send_test_frame', methods=['POST'])
def post_send_test_frame():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for triggering a TEST_FRAME via POST"})
    if app.states.is_modem_running:
        server_commands.modem_send_test_frame()
    return api_response({"cmd": "test_frame"})

@app.route('/modem/fec_transmit', methods=['POST'])
def post_send_fec_frame():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for triggering a FEC frame via POST"})
    if app.states.is_modem_running:
        server_commands.modem_fec_transmit(request.json)
    return api_response(request.json)

@app.route('/modem/fec_is_writing', methods=['POST'])
def post_send_fec_is_writing():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for triggering a IS WRITING frame via POST"})
    if app.states.is_modem_running:
        server_commands.modem_fec_is_writing(request.json)
    return api_response(request.json)

@app.route('/modem/start', methods=['POST'])
def post_modem_start():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for STARTING modem via POST"})
    print("start received...")
    app.modem_service.put("start")
    return api_response(request.json)

@app.route('/modem/stop', methods=['POST'])
def post_modem_stop():
    if request.method not in ['POST']:
        return api_response({"info": "endpoint for STOPPING modem via POST"})
    print("stop received...")

    app.modem_service.put("stop")
    return api_response(request.json)

@app.route('/version', methods=['GET'])
def get_modem_version():
    return api_response({"version": 0})


# @app.route('/modem/arq_connect', methods=['POST'])
# @app.route('/modem/arq_disconnect', methods=['POST'])
# @app.route('/modem/send_raw', methods=['POST'])
# @app.route('/modem/stop_transmission', methods=['POST'])
# @app.route('/modem/listen', methods=['POST']) # not needed if we are restarting modem on changing settings
# @app.route('/modem/record_audio', methods=['POST'])
# @app.route('/modem/responde_to_call', methods=['POST']) # not needed if we are restarting modem on changing settings
# @app.route('/modem/responde_to_cq', methods=['POST']) # not needed if we are restarting modem on changing settings
# @app.route('/modem/audio_levels', methods=['POST']) # tx and rx # not needed if we are restarting modem on changing settings
# @app.route('/modem/mesh_ping', methods=['POST'])
# @app.route('/mesh/routing_table', methods=['GET'])
# @app.route('/modem/get_rx_buffer', methods=['GET'])
# @app.route('/modem/del_rx_buffer', methods=['POST'])
# @app.route('/rig/status', methods=['GET'])
# @app.route('/rig/mode', methods=['POST'])
# @app.route('/rig/frequency', methods=['POST'])
# @app.route('/rig/test_hamlib', methods=['POST'])





def transmit_sock_data_worker(client_list, event_queue):
    while True:
        event = event_queue.get()
        clients = client_list.copy()
        for client in clients:
            try:
                client.send(event)
            except Exception:
                client_list.remove(client)



def sock_watchdog(sock, client_list, event_queue):
    event_queue.put(json.dumps({"freedata-message": "hello-client"}))
    
    client_list.add(sock)
    while True:
        try:
            sock.receive(timeout=1)
        except Exception as e:
            print(f"client connection lost: {e}")
            try:
                client_list.remove(sock)
            except Exception as err:
                print(f"error removing client from list: {e} | {err}")
            break
    return

# Event websocket
@sock.route('/events')
def sock_events(sock):
    sock_watchdog(sock, events_client_list, app.modem_events)

@sock.route('/fft')
def sock_fft(sock):
    sock_watchdog(sock, fft_client_list, app.modem_fft)

@sock.route('/states')
def sock_states(sock):
    sock_watchdog(sock, states_client_list, app.state_queue)
    

# websocket multi client support for using with queued information.
# our client set which contains all connected websocket clients
events_client_list = set()
fft_client_list = set()
states_client_list = set()

# start a worker thread for every socket endpoint
events_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(events_client_list, app.modem_events))
events_thread.start()

states_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(states_client_list, app.state_queue))
states_thread.start()

fft_thread = threading.Thread(target=transmit_sock_data_worker, daemon=True, args=(fft_client_list, app.modem_fft))
fft_thread.start()