112 lines
3.1 KiB
Java
112 lines
3.1 KiB
Java
package eirb.pg203;
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import org.json.JSONArray;
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import org.json.JSONObject;
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import eirb.pg203.WeatherData.Condition;
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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.Instant;
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import java.util.ArrayList;
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/**
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* WeatherAPI implementation
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*/
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public class WeatherAPI implements WeatherDataAPI{
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private final String weatherAPIKey;
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private static final String forecastBaseURL = "https://api.weatherapi.com/v1/forecast.json";
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WeatherAPI(String weatherAPIKey) {
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this.weatherAPIKey = weatherAPIKey;
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}
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private JSONObject fetchWeather(int days, String city) throws IOException {
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URL url = URI.create(
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String.format(forecastBaseURL + "?key=%s&q=%s&days=%d",
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this.weatherAPIKey,
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city,
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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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private static WeatherData.Condition getConditionFromString(String str) {
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if (str.toLowerCase().contains("rain"))
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return Condition.RAINY;
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else if (str.toLowerCase().contains("partly"))
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return Condition.PARTIAL;
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else if (str.toLowerCase().contains("cloud"))
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return Condition.CLOUDY;
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return Condition.SUNNY;
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}
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private static WeatherData getWeatherDataFromForecast(JSONObject response, int day, String city) {
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JSONObject forecastDay = response.getJSONObject("forecast").getJSONArray("forecastday").getJSONObject(day);
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JSONArray forecastHour = forecastDay.getJSONArray("hour");
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float temp_c = forecastDay.getJSONObject("day").getFloat("avgtemp_c");
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// Calculates the mean for the day
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float windSpeed = 0;
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float windDirection = 0;
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for (int i = 0 ; i < forecastHour.length() ; ++i)
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{
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windSpeed += forecastHour.getJSONObject(i).getFloat("wind_kph");
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windDirection += forecastHour.getJSONObject(i).getFloat("wind_degree");
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}
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windSpeed /= forecastHour.length();
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windDirection /= forecastHour.length();
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String conditionStr = forecastDay.getJSONObject("day").getJSONObject("condition").getString("text");
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return new WeatherData(
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new City(city),
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Instant.now(),
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temp_c,
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windSpeed,
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windDirection,
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getConditionFromString(conditionStr)
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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, 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, 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 "WeatherAPI";
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}
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}
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