Synnefo

/*

 * Copyright 2010 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS 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.

 *

 * GSS 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 GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.server;

import gr.ebs.gss.server.ejb.TransactionHelper;

import java.io.IOException;

import java.util.concurrent.Callable;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

 * The servlet that handles user registration.

 *

 * @author past

 */

public class CouponVerifier extends BaseServlet {

        /**

         * The request parameter name for the verification flag.

         */

        private static final String VERIFY_PARAM = "verify";

        /**

         * The request parameter name for the coupon code.

         */

        private static final String CODE_PARAM = "code";

        /**

         * The request parameter name for the firstname.

         */

        private static final String FIRSTNAME_PARAM = "firstname";

        /**

         * The request parameter name for the lastname.

         */

        private static final String LASTNAME_PARAM = "lastname";

        /**

         * The request parameter name for the username.

         */

        private static final String USERNAME_PARAM = "username";

        /**

         * The request parameter name for the e-mail.

         */

        private static final String EMAIL_PARAM = "email";

        /**

         * The serial version UID of the class.

         */

        private static final long serialVersionUID = 1L;

        @Override

        public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {

                String firstname = request.getParameter(FIRSTNAME_PARAM);

                String lastname = request.getParameter(LASTNAME_PARAM);

                String email = request.getParameter(EMAIL_PARAM);

                final String username = request.getParameter(USERNAME_PARAM);

                final String code = request.getParameter(CODE_PARAM);

                String verify = request.getParameter(VERIFY_PARAM);

                response.setContentType("text/html");

                // Validate input parameters.

                if (username == null || username.isEmpty()) {

                        handleException(response, "No username was specified");

                        return;

                } else if (firstname == null || firstname.isEmpty()) {

                        handleException(response, "No firstname was specified");

                        return;

                } else if (lastname == null || lastname.isEmpty()) {

                        handleException(response, "No lastname was specified");

                        return;

                } else if (email == null || email.isEmpty()) {

                        handleException(response, "No email was specified");

                        return;

                } else if (code == null || code.isEmpty()) {

                        handleException(response, "No code was specified");

                        return;

                } else if (!"on".equalsIgnoreCase(verify)) {

                        String error = encode("You must verify that the coupon belongs to you");

                        String errorUrl = "couponSubmission.jsp?error=" + error;

                        errorUrl += "&username=" + username;

                        errorUrl += "&firstname=" + firstname;

                        errorUrl += "&lastname=" + lastname;

                        errorUrl += "&code=" + code;

                        errorUrl += "&email=" + email;

                        response.sendRedirect(errorUrl);

                        return;

                }

                try {

                        new TransactionHelper<Void>().tryExecute(new Callable<Void>() {

                                @Override

                                public Void call() throws Exception {

                                        getService().upgradeUserClass(username, code);

                                        return null;

                                }

                        });

                        response.sendRedirect("couponSubmitted.jsp?newQuota=" + getService().getCouponUserClass().getQuotaAsString());

                } catch (Exception e) {

                        handleException(response, e.getMessage());

                }

        }

        private void handleException(HttpServletResponse response, String error) throws IOException {

                String errorUrl = "coupon.jsp?error=" + error;

                response.sendRedirect(errorUrl);

        }

}