add support for real-world and custom sunrise/sunset times (closes #2)

src/main/java/io/github/jack1424/realtimeweather/requests/SunriseSunsetRequestObject.java

@@ -0,0 +1,59 @@
+package io.github.jack1424.realtimeweather.requests;
+
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+
+import javax.naming.ConfigurationException;
+import javax.net.ssl.HttpsURLConnection;
+import java.io.IOException;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.*;
+
+public class SunriseSunsetRequestObject {
+	private String sunriseTime, sunsetTime;
+
+	public SunriseSunsetRequestObject(TimeZone timeZone, String lat, String lon) throws IOException, ParseException, ConfigurationException {
+		URL url = new URL(String.format("https://api.sunrisesunset.io/json?lat=%s&lng=%s&timezone=UTC", lat, lon));
+
+		HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
+		con.setRequestMethod("GET");
+		con.connect();
+		int responseCode = con.getResponseCode();
+		if (responseCode > 399)
+			throw new ProtocolException("Server/client error (HTTP error " + responseCode + ")");
+
+		Scanner scanner = new Scanner(url.openStream());
+		StringBuilder data = new StringBuilder();
+		while (scanner.hasNext()) {
+			data.append(scanner.nextLine());
+		}
+		scanner.close();
+
+		JSONObject response = (JSONObject) ((JSONObject) new JSONParser().parse(data.toString())).get("results");
+		sunriseTime = response.get("sunrise").toString();
+		sunsetTime = response.get("sunset").toString();
+
+		if (sunriseTime.equalsIgnoreCase("null") || sunsetTime.equalsIgnoreCase("null"))
+			throw new ConfigurationException("Time(s) returned null. Check the sunrise/sunset longitude and latitude.");
+
+		DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("h:mm:ss a");
+		LocalDate currentDate = LocalDate.now(ZoneId.of("UTC"));
+		sunriseTime = ZonedDateTime.of(currentDate, LocalTime.parse(sunriseTime, timeFormatter), ZoneId.of("UTC")).withZoneSameInstant(timeZone.toZoneId()).format(timeFormatter);
+		sunsetTime = ZonedDateTime.of(currentDate, LocalTime.parse(sunsetTime, timeFormatter), ZoneId.of("UTC")).withZoneSameInstant(timeZone.toZoneId()).format(timeFormatter);
+	}
+
+	public String getSunriseTime() {
+		return sunriseTime;
+	}
+
+	public String getSunsetTime() {
+		return sunsetTime;
+	}
+}