package com.jotuntech.sketcher.client.command;

import java.nio.ByteBuffer;

import com.jotuntech.sketcher.client.Client;
import com.jotuntech.sketcher.client.Command;
import com.jotuntech.sketcher.client.Connection;
import com.jotuntech.sketcher.common.Input;
import com.jotuntech.sketcher.common.User;

/** Cursor command.
 * @author Thor Harald Johansen
 *
 */
public class CursorCommand implements Command {
	Input input;

	/** Constructs an Cursor command. */
	public CursorCommand() {

	}

	/** Constructs an Cursor command.
	 * @param user Source user.
	 * @param input Cursor position */
	public CursorCommand(Input input) {
		this.input = input;
	}

	public int perform(Client client, User user) {
		if(user == null) {
			/** Signed in users only. */
			return Connection.SEND_NONE;
		}

		if(user.isViewer()) {
			return Connection.SEND_NONE;
		}

		user.setCursor(input);

		/** Return and broadcast. */
		return Connection.SEND_OTHERS;
	}

	public void decode(ByteBuffer in) {
		input = new Input();
		input.decode(in);
	}

	public void encode(ByteBuffer out) {
		input.encode(out);
	}
}