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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.plugin.irccommands.command;
import net.java.sip.communicator.impl.protocol.irc.*;
/**
* Implementation of the /mode command. Manually manage modes.
*
* @author Danny van Heumen
*/
public class Mode implements Command
{
/**
* Constant for end index of command prefix.
*/
private static final int END_OF_MODE_COMMAND_PREFIX = 6;
/**
* Instance of the IRC connection.
*/
private IrcConnection connection;
/**
* Initialization of the /mode command.
*
* @param provider the provider instance
* @param connection the connection instance
*/
public Mode(final ProtocolProviderServiceIrcImpl provider,
final IrcConnection connection)
{
if (connection == null)
{
throw new IllegalArgumentException("connection cannot be null");
}
this.connection = connection;
}
/**
* Execute the command: send the mode change message.
*
* @param line the command message line
* @param source the originating channel/user from which the message was
* sent.
*/
@Override
public void execute(final String source, final String line)
{
if (line.length() <= END_OF_MODE_COMMAND_PREFIX)
{
// does not currently support requesting (and displaying) mode query
// results.
throw new IllegalArgumentException("Mode parameters are missing.");
}
final String rawModeString =
line.substring(END_OF_MODE_COMMAND_PREFIX);
if (rawModeString.trim().isEmpty())
{
throw new IllegalArgumentException(
"The mode command needs mode parameters to function.");
}
this.connection.getClient().changeMode(source + " " + rawModeString);
}
/**
* Usage instructions.
*/
@Override
public String help()
{
return "Usage: /mode <mode> [params ...]";
}
}
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