Homarr/packages/request-handler/src/weather.ts

import dayjs from "dayjs";
import { z } from "zod";

import { fetchWithTimeoutAsync } from "@homarr/core/infrastructure/http/timeout";

import { createCachedWidgetRequestHandler } from "./lib/cached-widget-request-handler";

export const weatherRequestHandler = createCachedWidgetRequestHandler({
  queryKey: "weatherAtLocation",
  widgetKind: "weather",
  async requestAsync(input: { latitude: number; longitude: number }) {
    const res = await fetchWithTimeoutAsync(
      `https://api.open-meteo.com/v1/forecast?latitude=${input.latitude}&longitude=${input.longitude}&daily=weathercode,temperature_2m_max,temperature_2m_min,sunrise,sunset,wind_speed_10m_max,wind_gusts_10m_max&current_weather=true&timezone=auto`,
    );
    const json: unknown = await res.json();
    const weather = await atLocationOutput.parseAsync(json);
    return {
      current: weather.current_weather,
      daily: weather.daily.time.map((value, index) => {
        return {
          time: value,
          weatherCode: weather.daily.weathercode[index] ?? 404,
          maxTemp: weather.daily.temperature_2m_max[index],
          minTemp: weather.daily.temperature_2m_min[index],
          sunrise: weather.daily.sunrise[index],
          sunset: weather.daily.sunset[index],
          maxWindSpeed: weather.daily.wind_speed_10m_max[index],
          maxWindGusts: weather.daily.wind_gusts_10m_max[index],
        };
      }),
    } satisfies Weather;
  },
  cacheDuration: dayjs.duration(1, "minute"),
});

const atLocationOutput = z.object({
  current_weather: z.object({
    weathercode: z.number(),
    temperature: z.number(),
    windspeed: z.number(),
  }),
  daily: z.object({
    time: z.array(z.string()),
    weathercode: z.array(z.number()),
    temperature_2m_max: z.array(z.number()),
    temperature_2m_min: z.array(z.number()),
    sunrise: z.array(z.string()),
    sunset: z.array(z.string()),
    wind_speed_10m_max: z.array(z.number()),
    wind_gusts_10m_max: z.array(z.number()),
  }),
});

export interface Weather {
  current: {
    weathercode: number;
    temperature: number;
    windspeed: number;
  };
  daily: {
    time: string;
    weatherCode: number;
    maxTemp: number | undefined;
    minTemp: number | undefined;
    sunrise: string | undefined;
    sunset: string | undefined;
    maxWindSpeed: number | undefined;
    maxWindGusts: number | undefined;
  }[];
}