me.lucko.helper.profiles.plugin.UuidUtils Maven / Gradle / Ivy

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Provides a cached lookup service for player profiles.

There is a newer version: 1.2.0

/*
 * This file is part of helper, licensed under the MIT License.
 *
 *  Copyright (c) lucko (Luck) 
 *  Copyright (c) contributors
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 */

package me.lucko.helper.profiles.plugin;

import java.util.UUID;
import java.util.regex.Pattern;

class UuidUtils {

    private static final Pattern MINECRAFT_USERNAME_PATTERN = Pattern.compile("^\\w{3,16}$");
    private static final Pattern UUID_PATTERN = Pattern.compile("(\\w{8})(\\w{4})(\\w{4})(\\w{4})(\\w{12})");
    private static final String CANONICAL_UUID_FORM = "$1-$2-$3-$4-$5";

    public static String toString(UUID uuid) {
        return (digits(uuid.getMostSignificantBits() >> 32, 8) +
                digits(uuid.getMostSignificantBits() >> 16, 4) +
                digits(uuid.getMostSignificantBits(), 4) +
                digits(uuid.getLeastSignificantBits() >> 48, 4) +
                digits(uuid.getLeastSignificantBits(), 12));
    }

    /** Returns val represented by the specified number of hex digits. */
    private static String digits(long val, int digits) {
        long hi = 1L << (digits * 4);
        return Long.toHexString(hi | (val & (hi - 1))).substring(1);
    }

    public static UUID fromString(String uuid) {
        return UUID.fromString(UUID_PATTERN.matcher(uuid.toLowerCase()).replaceAll(CANONICAL_UUID_FORM));
    }

    public static boolean isValidMcUsername(String s) {
        return MINECRAFT_USERNAME_PATTERN.matcher(s).matches();
    }

}