src/main/java/de/uapcore/lightpit/modules/UsersModule.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2021 Mike Becker. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
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package de.uapcore.lightpit.modules;

import de.uapcore.lightpit.AbstractServlet;
import de.uapcore.lightpit.Constants;
import de.uapcore.lightpit.HttpMethod;
import de.uapcore.lightpit.RequestMapping;
import de.uapcore.lightpit.dao.DataAccessObject;
import de.uapcore.lightpit.entities.User;
import de.uapcore.lightpit.viewmodel.UsersEditView;
import de.uapcore.lightpit.viewmodel.UsersView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.sql.SQLException;
import java.util.NoSuchElementException;

@WebServlet(
        name = "UsersModule",
        urlPatterns = "/teams/*"
)
public final class UsersModule extends AbstractServlet {

    private static final Logger LOG = LoggerFactory.getLogger(UsersModule.class);

    @RequestMapping(method = HttpMethod.GET)
    public void index(HttpServletRequest req, HttpServletResponse resp, DataAccessObject dao) throws SQLException, ServletException, IOException {
        final var viewModel = new UsersView();
        viewModel.setUsers(dao.listUsers());
        setViewModel(req, viewModel);
        setContentPage(req, "users");

        renderSite(req, resp);
    }

    @RequestMapping(requestPath = "edit", method = HttpMethod.GET)
    public void edit(HttpServletRequest req, HttpServletResponse resp, DataAccessObject dao) throws SQLException, ServletException, IOException {

        final var viewModel = new UsersEditView();
        viewModel.setUser(findByParameter(req, Integer.class, "id", dao::findUser).orElse(new User(-1)));

        setViewModel(req, viewModel);
        setContentPage(req, "user-form");

        renderSite(req, resp);
    }

    @RequestMapping(requestPath = "commit", method = HttpMethod.POST)
    public void commit(HttpServletRequest req, HttpServletResponse resp, DataAccessObject dao) throws ServletException, IOException {

        User user = new User(-1);
        try {
            user = new User(getParameter(req, Integer.class, "userid").orElseThrow());
            user.setUsername(getParameter(req, String.class, "username").orElseThrow());
            getParameter(req, String.class, "givenname").ifPresent(user::setGivenname);
            getParameter(req, String.class, "lastname").ifPresent(user::setLastname);
            getParameter(req, String.class, "mail").ifPresent(user::setMail);

            if (user.getId() > 0) {
                dao.updateUser(user);
            } else {
                dao.insertUser(user);
            }

            setRedirectLocation(req, "./teams/");
            setContentPage(req, Constants.JSP_COMMIT_SUCCESSFUL);

            LOG.debug("Successfully updated user {}", user.getUsername());
        } catch (NoSuchElementException | IllegalArgumentException ex) {
            final var viewModel = new UsersEditView();
            viewModel.setUser(user);
            // TODO: viewModel.setErrorText()
            setViewModel(req, viewModel);
            setContentPage(req, "user-form");
            LOG.warn("Form validation failure: {}", ex.getMessage());
            LOG.debug("Details:", ex);
        }

        renderSite(req, resp);
    }
}