123 lines
3.5 KiB
Java
123 lines
3.5 KiB
Java
package eirb.pg203;
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import org.json.JSONObject;
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import eirb.pg203.utils.JSONFetcher;
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import java.io.IOException;
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import java.net.URI;
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import java.net.URL;
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import java.time.Clock;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.Locale;
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import eirb.pg203.WeatherData.Condition;
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// https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&hourly=temperature_2m
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/**
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* OpenMeteo implementation
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*/
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public class OpenMeteo implements WeatherDataAPI {
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private static final String forecastBaseURL = "https://api.open-meteo.com/v1/forecast";
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private static final String dailyQuery = "weather_code,temperature_2m_max,temperature_2m_min,wind_speed_10m_max,wind_direction_10m_dominant";
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JSONFetcher JSONFetcher = new JSONFetcher();
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Clock clock = Clock.systemUTC();
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/**
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* Default constructor
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*/
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public OpenMeteo() {}
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// https://www.nodc.noaa.gov/archive/arc0021/0002199/1.1/data/0-data/HTML/WMO-CODE/WMO4677.HTM
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private JSONObject fetchWeather(int days, City city) throws IOException {
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URL url = URI.create(
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String.format(Locale.ENGLISH, forecastBaseURL + "?latitude=%.2f&longitude=%.2f&forecast_days=%d&daily=" + dailyQuery,
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city.getCityCoords().getLat(),
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city.getCityCoords().getLon(),
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days
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)
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).toURL();
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return JSONFetcher.fetch(url);
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}
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/**
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* return condition based on the WMOCode
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* table can be found here : https://open-meteo.com/en/docs (at the end)
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* @param WMOCode id code
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* @return weather condition
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*/
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private static Condition getConditionFromCode(int WMOCode) {
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return switch (WMOCode) {
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case 0, 1 -> Condition.SUNNY;
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case 2 -> Condition.PARTIAL;
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case 3 -> Condition.CLOUDY;
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case 61, 63, 65, 80, 81, 82 -> Condition.RAINY;
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default -> Condition.ERROR;
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};
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}
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private WeatherData getWeatherDataFromForecast(JSONObject response, int day, String city) {
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JSONObject daily = response.getJSONObject("daily");
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float max_temp = daily.getJSONArray("temperature_2m_max").getFloat(day);
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float min_temp = daily.getJSONArray("temperature_2m_min").getFloat(day);
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float temp_c = (min_temp + max_temp) / 2;
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float windSpeed = daily.getJSONArray("wind_speed_10m_max").getFloat(day);
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float windDirection = daily.getJSONArray("wind_direction_10m_dominant").getFloat(day);
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int conditionCode = daily.getJSONArray("weather_code").getInt(day);
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return new WeatherData(
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new City(city),
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Instant.now(clock),
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temp_c,
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windSpeed,
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windDirection,
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getConditionFromCode(conditionCode)
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);
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}
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/**
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* @param day Day, 0 ≤ day ≤ 14
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*/
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@Override
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public WeatherData getTemperature(int day, String city) throws IOException {
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JSONObject result = fetchWeather(day + 1, new City(city));
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return getWeatherDataFromForecast(result, day, city);
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}
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@Override
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public WeatherData getTemperature(int day, int hour, String city) throws IOException{
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return getTemperature(day, city);
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}
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@Override
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public ArrayList<WeatherData> getTemperatures(int days, String city) throws IOException {
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JSONObject result = fetchWeather(days, new City(city));
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ArrayList<WeatherData> weatherDatas = new ArrayList<>();
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for (int day = 0; day < days; ++day) {
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weatherDatas.add(
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getWeatherDataFromForecast(result, day, city)
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);
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}
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return weatherDatas;
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}
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@Override
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public String getAPIName() {
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return "OpenMeteo";
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}
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@Override
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public String toString() {
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return this.getAPIName();
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}
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}
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