Untitled

 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.l2j.gameserver.model.actor.instance;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.Base64;
import java.util.StringTokenizer;

import net.sf.l2j.commons.pool.ThreadPool;

import net.sf.l2j.commons.pool.ConnectionPool;

import net.sf.l2j.gameserver.model.actor.Player;
import net.sf.l2j.gameserver.model.actor.template.NpcTemplate;
import net.sf.l2j.gameserver.network.SystemMessageId;
import net.sf.l2j.gameserver.network.serverpackets.NpcHtmlMessage;
import net.sf.l2j.gameserver.network.serverpackets.SystemMessage;

/**
 * @author SweeTs
 */
public class PasswordManager extends Folk
{
    public PasswordManager(int objectId, NpcTemplate template)
    {
        super(objectId, template);
    }

    @Override
    public void onBypassFeedback(Player player, String command)
    {
        if (command.startsWith("change_password"))
        {
            StringTokenizer st = new StringTokenizer(command);
            st.nextToken();

            String newPass = "";
            String repeatNewPass = "";

            try
            {
                if (st.hasMoreTokens())
                {
                    newPass = st.nextToken();
                    repeatNewPass = st.nextToken();
                }
            }
            catch (Exception e)
            {
                player.sendMessage("Please fill all the blanks before requesting for a password change.");
                return;
            }

            if (!conditions(newPass, repeatNewPass, player))
                return;

            changePassword(newPass, repeatNewPass, player);
        }
    }

    private static boolean conditions(String newPass, String repeatNewPass, Player player)
    {
        if (newPass.length() < 3)
        {
            player.sendMessage("The new password is too short!");
            return false;
        }
        else if (newPass.length() > 45)
        {
            player.sendMessage("The new password is too long!");
            return false;
        }
        else if (!newPass.equals(repeatNewPass))
        {
            player.sendPacket(SystemMessage.getSystemMessage(SystemMessageId.PASSWORD_ENTERED_INCORRECT2));
            return false;
        }

        return true;
    }

    @Override
    public void showChatWindow(Player activeChar)
    {
        final NpcHtmlMessage html = new NpcHtmlMessage(0);
        final StringBuilder sb = new StringBuilder();

        sb.append("<html><title>Account Manager</title>");
        sb.append("<body><center>");
        sb.append("<img src=\"L2UI_CH3.herotower_deco\" width=256 height=32><br>");
        sb.append("New password: <edit var=\"new\" width=100 height=15><br>");
        sb.append("Repeat: <edit var=\"repeatnew\" width=100 height=15><br>");
        sb.append("<img src=\"L2UI_CH3.herotower_deco\" width=256 height=32><br><br>");
        sb.append("<a action=\"bypass -h npc_%objectId%_change_password $new $repeatnew\">Change password</a>");
        sb.append("</center></body></html>");

        html.setHtml(sb.toString());
        html.replace("%objectId%", getObjectId());
        activeChar.sendPacket(html);
    }

    private static void changePassword(String newPass, String repeatNewPass, Player activeChar)
    {
        try (Connection con = ConnectionPool.getConnection(); PreparedStatement ps = con.prepareStatement("UPDATE accounts SET password=? WHERE login=?"))
        {
            byte[] newPassword = MessageDigest.getInstance("SHA").digest(newPass.getBytes(StandardCharsets.UTF_8));

            ps.setString(1, Base64.getEncoder().encodeToString(newPassword));
            ps.setString(2, activeChar.getAccountName());
            ps.executeUpdate();

            activeChar.sendMessage("Congratulations! Your password has been changed. You will now be disconnected for security reasons. Please login again.");
            ThreadPool.schedule(() -> activeChar.logout(false), 3000);
        }
        catch (Exception e)
        {
            LOGGER.info("There was an error while updating account:" + e);
        }
    }
}