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feat: prefer IMGW ALARO forecast data

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zv
2026-06-02 20:23:55 +02:00
parent ad4248efdf
commit b97a1cf1ea
11 changed files with 371 additions and 69 deletions
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79
lib/forecast-api.ts
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@@ -1,53 +1,61 @@
import type { DailyForecast, HourlyForecast, RawForecastSeries, RawWeatherForecast, WeatherForecast } from "@/types/forecast";
import type { DailyForecast, ForecastSource, HourlyForecast, WeatherForecast } from "@/types/forecast";
function asArray(value: unknown): unknown[] {
return Array.isArray(value) ? value : [];
}
function readString(series: RawForecastSeries, key: keyof RawForecastSeries, index: number) {
const value = asArray(series[key])[index];
return typeof value === "string" && value ? value : null;
}
function readNumber(series: RawForecastSeries, key: keyof RawForecastSeries, index: number) {
const value = asArray(series[key])[index];
function readNumber(value: unknown) {
return typeof value === "number" && Number.isFinite(value) ? value : null;
}
function normalizeHourlyForecast(series: RawForecastSeries = {}): HourlyForecast[] {
return asArray(series.time).flatMap((_, index) => {
const time = readString(series, "time", index);
function readString(value: unknown) {
return typeof value === "string" && value ? value : null;
}
function isForecastSource(value: unknown): value is ForecastSource {
return value === "imgw-alaro" || value === "open-meteo";
}
function normalizeSources(value: unknown): ForecastSource[] {
return Array.isArray(value) ? value.filter(isForecastSource) : [];
}
function normalizeHourlyForecast(value: unknown): HourlyForecast[] {
return Array.isArray(value) ? value.flatMap((candidate) => {
if (!candidate || typeof candidate !== "object") return [];
const row = candidate as Partial<HourlyForecast>;
const time = readString(row.time);
if (!time) return [];
return [{
time,
temperature: readNumber(series, "temperature_2m", index),
feelsLike: readNumber(series, "apparent_temperature", index),
precipitationProbability: readNumber(series, "precipitation_probability", index),
precipitation: readNumber(series, "precipitation", index),
weatherCode: readNumber(series, "weather_code", index),
windSpeed: readNumber(series, "wind_speed_10m", index),
temperature: readNumber(row.temperature),
feelsLike: readNumber(row.feelsLike),
precipitationProbability: readNumber(row.precipitationProbability),
precipitation: readNumber(row.precipitation),
weatherCode: readNumber(row.weatherCode),
windSpeed: readNumber(row.windSpeed),
source: isForecastSource(row.source) ? row.source : "open-meteo",
}];
});
}) : [];
}
function normalizeDailyForecast(series: RawForecastSeries = {}): DailyForecast[] {
return asArray(series.time).flatMap((_, index) => {
const date = readString(series, "time", index);
function normalizeDailyForecast(value: unknown): DailyForecast[] {
return Array.isArray(value) ? value.flatMap((candidate) => {
if (!candidate || typeof candidate !== "object") return [];
const row = candidate as Partial<DailyForecast>;
const date = readString(row.date);
if (!date) return [];
return [{
date,
temperatureMax: readNumber(series, "temperature_2m_max", index),
temperatureMin: readNumber(series, "temperature_2m_min", index),
precipitationProbability: readNumber(series, "precipitation_probability_max", index),
precipitation: readNumber(series, "precipitation_sum", index),
weatherCode: readNumber(series, "weather_code", index),
sunrise: readString(series, "sunrise", index),
sunset: readString(series, "sunset", index),
temperatureMax: readNumber(row.temperatureMax),
temperatureMin: readNumber(row.temperatureMin),
precipitationProbability: readNumber(row.precipitationProbability),
precipitation: readNumber(row.precipitation),
weatherCode: readNumber(row.weatherCode),
sunrise: readString(row.sunrise),
sunset: readString(row.sunset),
sources: normalizeSources(row.sources),
}];
});
}) : [];
}
function normalizeForecast(raw: RawWeatherForecast): WeatherForecast {
function normalizeForecast(raw: Partial<WeatherForecast>): WeatherForecast {
const latitude = Number(raw.latitude);
const longitude = Number(raw.longitude);
if (!Number.isFinite(latitude) || !Number.isFinite(longitude)) throw new Error("Forecast service returned invalid coordinates.");
@@ -57,6 +65,7 @@ function normalizeForecast(raw: RawWeatherForecast): WeatherForecast {
timezone: typeof raw.timezone === "string" ? raw.timezone : "Europe/Warsaw",
hourly: normalizeHourlyForecast(raw.hourly),
daily: normalizeDailyForecast(raw.daily),
sources: normalizeSources(raw.sources),
};
}
@@ -64,5 +73,5 @@ export async function fetchForecast(latitude: number, longitude: number, signal?
const params = new URLSearchParams({ latitude: String(latitude), longitude: String(longitude) });
const response = await fetch(`/api/forecast?${params}`, { signal });
if (!response.ok) throw new Error("Unable to load forecast.");
return normalizeForecast(await response.json() as RawWeatherForecast);
return normalizeForecast(await response.json() as Partial<WeatherForecast>);
}