server.py

from flask import Flask, send_from_directory, json, Response
from os.path import exists
import os
import threading
import inspect


SERVER_PORT = 1234


class DummyClass:
    def nothing():
        print("nothing")


file_path = os.path.dirname(os.path.abspath(inspect.getsourcefile(DummyClass)))


class MapServer:
    app = Flask(__name__)
    last_rover_coords = [-1, 0]
    debug = True

    def register_routes(self):
        @self.app.route("/")
        def serve_index():
            return send_from_directory("frontend", "index.html")

        @self.app.route("/tile/<z>/<x>/<y>")
        def serve_tile(z, x, y):
            tileFilePath = file_path + "/tiles/z{}, x{}, y{}.jpg".format(z, x, y)
            if self.debug:
                print(f"{file_path}")
            if exists(tileFilePath):
                tileFD = open(tileFilePath, "rb")
                img = tileFD.read()
                tileFD.close()
                return img

            return Response(status=404)

        @self.app.route("/roverCoords")
        def return_rover_coords():
            if self.debug:
                print(f"lastcoords {self.last_rover_coords}")
            return json.dumps(self.last_rover_coords)

        @self.app.route("/<path:path>")
        def serve_static(path):
            return send_from_directory("frontend", path)

    def update_rover_coords(self, lat_lng_array):
        if self.debug:
            print("updating rover coords")
        self.last_rover_coords = lat_lng_array
        if self.debug:
            print(f"updated {self.last_rover_coords}")

    def start(self, debug=True):
        self.debug = debug
        print("starting server")

        def thread_target():
            self.app.run(debug=False, host="0.0.0.0", port=SERVER_PORT)

        threading.Thread(target=thread_target).start()


if __name__ == "__main__":
    mapServer = MapServer()
    mapServer.register_routes()
    mapServer.start()