/**
 * This file is part of the Meeds project (https://meeds.io/).
 *
 * Copyright (C) 2020 - 2025 Meeds Association contact@meeds.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.exoplatform.portal.registration;

import org.exoplatform.container.xml.InitParams;
import org.exoplatform.services.mail.MailService;
import org.exoplatform.services.organization.User;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.log.ExoLogger;

/**
 * This service contains actions, which should be performed after successful registration of new user (Sending mail, Activating
 * of user, which is disabled by default etc.)<br>
 *
 */
public class PostRegistrationService {
    private final String mailFrom;
    private final String mailTo;
    private final String mailSubject;
    private final String mailMessage;
    private final MailService mailService;
    private final Boolean sendMailEnabled; // If false, then mails won't be send.

    private static final Log log = ExoLogger.getLogger(PostRegistrationService.class);

    public PostRegistrationService(InitParams params, MailService mailService) {
        this.mailService = mailService;
        this.sendMailEnabled = Boolean.valueOf(params.getValueParam("sendMailAfterRegistration").getValue());
        this.mailFrom = params.getValueParam("mailFrom").getValue();
        this.mailTo = params.getValueParam("mailTo").getValue();
        this.mailSubject = params.getValueParam("mailSubject").getValue();
        this.mailMessage = params.getValueParam("mailMessage").getValue();
    }

    /**
     * This method can be used to send mail to administrator after successful registration of new user.
     *
     * @param user which just register himself to portal.
     */
    public void sendMailAfterSuccessfulRegistration(User user) {
        // return if sending mails disabled in configuration.
        if (!sendMailEnabled) {
            log.debug("Sending of mails disabled. Mail won't be send about creating of user " + user.getUserName());
            return;
        }

        try {
            String subject = replaceTokens(mailSubject, user);
            String message = replaceTokens(mailMessage, user);
            String to = replaceTokens(mailTo, user);

            log.debug("Sending mail about the creating of user " + user.getUserName());
            mailService.sendMessage(mailFrom, to, subject, message);
        } catch (Exception e) {
            log.error("Error when sending mail to admin after registration of user " + user.getUserName(), e);
        }
    }

    /**
     * Replace tokens in message with real values of user. This can be used to inform administrator about attributes of concrete
     * user.
     *
     * @param param
     * @param user
     * @return
     */
    private String replaceTokens(String param, User user) {
        String result = param.replaceAll("\\$\\{user.userName\\}", user.getUserName());
        result = result.replaceAll("\\$\\{user.firstName\\}", user.getFirstName());
        result = result.replaceAll("\\$\\{user.lastName\\}", user.getLastName());
        result = result.replaceAll("\\$\\{user.email\\}", user.getEmail());
        return result;
    }

}
