chutney/weather_display.py

import colors
import requests

from configparser import ConfigParser


class WeatherDisplay:
    def __init__(self, characterDisplay, topRow, configFile):
        self.characterDisplay = characterDisplay
        self.topRow = topRow
        self.currentTemperature = [9, 9]
        self.color = colors.BLUE

        config = ConfigParser()
        config.read(configFile)

        host = config['weather'].get('host')
        user = config['weather'].get('user')
        password = config['weather'].get('pass')
        lat = config['weather'].get('lat')
        lon = config['weather'].get('lon')

        self.uri = f'https://{host}/api/weather?lat={lat}&lon={lon}&units=metric'
        self.auth = (user, password)

    def showWeather(self):
        try:
            self.showTemperature(
                self.getTemperatureCharacters(self.getTemperature()))
        except requests.exceptions.ConnectionError:
            print("connection error", flush=True)
            self.characterDisplay.clearRow(self.topRow)
        except requests.exceptions.Timeout:
            print("timeout", flush=True)
            self.characterDisplay.clearRow(self.topRow)

    def showTemperature(self, temperature):
        if temperature != self.currentTemperature:
            self.characterDisplay.clearRow(self.topRow)

            start = 13 if (
                len(temperature) == 2 and temperature[0] == '-') or len(temperature) == 1 else 9

            for c in temperature:
                if c == '-':
                    self.characterDisplay.displayNegative(
                        start-3, self.topRow, self.color)
                else:
                    self.characterDisplay.displayDigit(
                        start, self.topRow, c, self.color)
                    start = start + 4

            self.currentTemperature = temperature

    def getTemperature(self):
        return list(filter(lambda t: t["timestep"] == 'current', requests.get(self.uri, auth=self.auth, timeout=2).json()["tomorrow"]["data"]['timelines']))[0]["intervals"][0]["values"]["temperature"]

    def getTemperatureCharacters(self, temperature):
        return list(str(round(temperature)))