com.turt2live.hurtle.uuid.NameFetcher.java Source code

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Here is the source code for com.turt2live.hurtle.uuid.NameFetcher.java

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/*******************************************************************************
 * Copyright (C) 2014 Travis Ralston (turt2live)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package com.turt2live.hurtle.uuid;

import com.google.common.collect.ImmutableList;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Callable;

// Source: https://gist.github.com/evilmidget38/a5c971d2f2b2c3b3fb37
public class NameFetcher implements Callable<Map<UUID, String>> {

    private static final String PROFILE_URL = "https://sessionserver.mojang.com/session/minecraft/profile/";
    private final JSONParser jsonParser = new JSONParser();
    private final List<UUID> uuids;

    public NameFetcher(List<UUID> uuids) {
        this.uuids = ImmutableList.copyOf(uuids);
    }

    @Override
    public Map<UUID, String> call() throws Exception {
        Map<UUID, String> uuidStringMap = new HashMap<UUID, String>();
        for (UUID uuid : uuids) {
            HttpURLConnection connection = (HttpURLConnection) new URL(
                    PROFILE_URL + uuid.toString().replace("-", "")).openConnection();
            JSONObject response = (JSONObject) jsonParser.parse(new InputStreamReader(connection.getInputStream()));
            String name = (String) response.get("name");
            if (name == null) {
                continue;
            }
            String cause = (String) response.get("cause");
            String errorMessage = (String) response.get("errorMessage");
            if (cause != null && !cause.isEmpty()) {
                throw new IllegalStateException(errorMessage);
            }
            uuidStringMap.put(uuid, name);
        }
        return uuidStringMap;
    }
}