com.chaosinmotion.securechat.server.commands.Devices.java Source code

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Here is the source code for com.chaosinmotion.securechat.server.commands.Devices.java

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/*   SecureChat: A secure chat system which permits secure communications 
 *  between iOS devices and a back-end server.
 *
 *   Copyright  2016 by William Edward Woody
 *
 *   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 com.chaosinmotion.securechat.server.commands;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.json.JSONObject;
import com.chaosinmotion.securechat.server.database.Database;
import com.chaosinmotion.securechat.server.json.DeviceReturnResult;
import com.chaosinmotion.securechat.server.json.ReturnResult;
import com.chaosinmotion.securechat.shared.Errors;

public class Devices {
    /**
     * Return the list of device identifiers associated with this account.
     * @param userinfo
     * @param requestParams
     * @return
     * @throws IOException 
     * @throws SQLException 
     * @throws ClassNotFoundException 
     */
    public static ReturnResult processRequest(Login.UserInfo userinfo, JSONObject requestParams)
            throws ClassNotFoundException, SQLException, IOException {
        String username = requestParams.getString("username");

        Connection c = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        try {
            c = Database.get();

            /*
             *    Get user ID
             */

            ps = c.prepareStatement("SELECT userid " + "FROM Users " + "WHERE username = ?");
            ps.setString(1, username);
            rs = ps.executeQuery();

            int userid = 0;
            if (rs.next()) {
                userid = rs.getInt(1);
            } else {
                return new ReturnResult(Errors.ERROR_UNKNOWNUSER, "Unknown user");
            }
            rs.close();
            rs = null;
            ps.close();
            ps = null;

            /*
             * Get devices
             */
            ps = c.prepareStatement("SELECT Devices.deviceuuid, Devices.publickey " + "FROM Devices, Users "
                    + "WHERE Users.userid = Devices.userid " + "AND Users.username = ?");
            ps.setString(1, username);
            rs = ps.executeQuery();

            DeviceReturnResult drr = new DeviceReturnResult(userid);
            while (rs.next()) {
                drr.addDeviceUUID(rs.getString(1), rs.getString(2));
            }
            return drr;
        } finally {
            if (rs != null)
                rs.close();
            if (ps != null)
                ps.close();
            if (c != null)
                c.close();
        }
    }
}