Commons/src/main/java/eu/univento/commons/player/uuid/NameFetcher.java

package eu.univento.commons.player.uuid;

import eu.univento.commons.Commons;
import eu.univento.commons.server.ServerType;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.UUID;

/**
 * @author codebucketdev
 */

public class NameFetcher {
    private static final JSONParser jsonParser = new JSONParser();
    private static final String REQUEST_URL = "https://mcapi.de/api/user/";
    private static final String PROFILE_URL = "https://sessionserver.mojang.com/session/minecraft/profile/";

    public static String getRequest(UUID uuid) {
        try {
            HttpURLConnection connection = (HttpURLConnection) new URL(REQUEST_URL + fromUniqueId(uuid)).openConnection();
            JSONObject response = (JSONObject) jsonParser.parse(new InputStreamReader(connection.getInputStream()));

            String uniqueId = (String) response.get("uuid");
            if (uniqueId.length() == 0)
                Commons.getCommons().getLoggingHandler().log(ServerType.getServerType() ,"A Username for UUID '" + uuid.toString() + "' was not found in the database! Is the account not premium?");

            return (String) response.get("username");
        } catch (IOException |ParseException e) {
            return callMojang(uuid);
        }
    }

    private static String callMojang(UUID uuid) {
        try {
            HttpURLConnection connection = (HttpURLConnection) new URL(PROFILE_URL + fromUniqueId(uuid)).openConnection();
            JSONObject response = (JSONObject) jsonParser.parse(new InputStreamReader(connection.getInputStream()));

            String name = (String) response.get("name");
            if (name == null)
                Commons.getCommons().getLoggingHandler().log(ServerType.getServerType(),"A Username for UUID '" + uuid.toString() + "' was not found in the database! Is the account not premium?");

            String cause = (String) response.get("cause");
            String errorMessage = (String) response.get("errorMessage");
            if (cause != null && cause.length() > 0) {
                Commons.getCommons().getLoggingHandler().log(ServerType.getServerType(), errorMessage);
            }
            return name;
        } catch (IOException | ParseException e) {
            e.printStackTrace();
            Commons.getCommons().getLoggingHandler().log(ServerType.getServerType(), "A Username for UUID '" + uuid.toString() + "' was not found in the database! Is the account not premium?");
        }
        return null;
    }

    private static String fromUniqueId(UUID uuid) {
        return uuid.toString().replaceAll("-", "");
    }
}