DMDirc-Client/src/com/dmdirc/UserManager.java

/*
 * Copyright (c) 2006-2015 DMDirc Developers
 *
 * 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 com.dmdirc;

import com.dmdirc.interfaces.Connection;
import com.dmdirc.interfaces.User;
import com.dmdirc.parser.interfaces.ClientInfo;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

import javax.inject.Inject;
import javax.inject.Singleton;

/**
 *
 */
@Singleton
public class UserManager {

    private final UserFactory userFactory;
    private final Map<ClientInfo, User> userCache;

    @Inject
    public UserManager(final UserFactory userFactory) {
        this.userFactory = userFactory;
        userCache = new HashMap<>();
    }

    public User getUserFromClientInfo(final ClientInfo client, final Connection connection) {
        userCache.putIfAbsent(client, userFactory.getUser(client.getNickname(), connection,
                Optional.ofNullable(client.getUsername()),
                Optional.ofNullable(client.getHostname()),
                Optional.ofNullable(client.getRealname()), client));
        return userCache.get(client);
    }
}