/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.java.sip.communicator.impl.protocol.irc;

/**
 * Interface of the presence watcher.
 * 
 * This interface defines the requirements of a presence watcher. The watcher is
 * used to update contact presence for a selection of nicks.
 * 
 * @author Danny van Heumen
 */
public interface PresenceWatcher
{
    /**
     * Add a nick to the list.
     *
     * @param nick the nick
     */
    void add(String nick);

    /**
     * Remove a nick from the list.
     *
     * @param nick the nick
     */
    void remove(String nick);
}