universe@7: /*
universe@7:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@34:  *
universe@24:  * Copyright 2018 Mike Becker. All rights reserved.
universe@34:  *
universe@7:  * Redistribution and use in source and binary forms, with or without
universe@7:  * modification, are permitted provided that the following conditions are met:
universe@7:  *
universe@7:  *   1. Redistributions of source code must retain the above copyright
universe@7:  *      notice, this list of conditions and the following disclaimer.
universe@7:  *
universe@7:  *   2. Redistributions in binary form must reproduce the above copyright
universe@7:  *      notice, this list of conditions and the following disclaimer in the
universe@7:  *      documentation and/or other materials provided with the distribution.
universe@7:  *
universe@7:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@7:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@7:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@7:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@7:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@7:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@7:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@7:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@7:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@7:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@7:  * POSSIBILITY OF SUCH DAMAGE.
universe@34:  *
universe@7:  */
universe@7: package de.uapcore.lightpit.modules;
universe@7: 
universe@31: import de.uapcore.lightpit.*;
universe@86: import de.uapcore.lightpit.viewmodel.LanguageView;
universe@31: import org.slf4j.Logger;
universe@31: import org.slf4j.LoggerFactory;
universe@31: 
universe@31: import javax.servlet.ServletException;
universe@7: import javax.servlet.annotation.WebServlet;
universe@11: import javax.servlet.http.HttpServletRequest;
universe@11: import javax.servlet.http.HttpServletResponse;
universe@31: import java.util.*;
universe@7: 
universe@7: @WebServlet(
universe@11:         name = "LanguageModule",
universe@11:         urlPatterns = "/language/*"
universe@7: )
universe@11: public final class LanguageModule extends AbstractLightPITServlet {
universe@34: 
universe@13:     private static final Logger LOG = LoggerFactory.getLogger(LanguageModule.class);
universe@34: 
universe@15:     private final List<Locale> languages = new ArrayList<>();
universe@13: 
universe@13:     @Override
universe@78:     protected String getResourceBundleName() {
universe@78:         return "localization.language";
universe@78:     }
universe@78: 
universe@78:     @Override
universe@13:     public void init() throws ServletException {
universe@13:         super.init();
universe@34: 
universe@13:         Optional<String[]> langs = Functions.availableLanguages(getServletContext());
universe@13:         if (langs.isPresent()) {
universe@13:             for (String lang : langs.get()) {
universe@13:                 try {
universe@13:                     Locale locale = Locale.forLanguageTag(lang);
universe@13:                     if (locale.getLanguage().isEmpty()) {
universe@13:                         throw new IllformedLocaleException();
universe@13:                     }
universe@13:                     languages.add(locale);
universe@13:                 } catch (IllformedLocaleException ex) {
universe@39:                     LOG.warn("Specified language {} in context parameter cannot be mapped to an existing locale - skipping.", lang);
universe@13:                 }
universe@13:             }
universe@34: 
universe@13:         } else {
universe@13:             languages.add(Locale.ENGLISH);
universe@39:             LOG.warn("Context parameter 'available-languages' not found. Only english will be available.");
universe@13:         }
universe@13:     }
universe@15: 
universe@15:     @Override
universe@15:     public void destroy() {
universe@15:         super.destroy();
universe@15:         languages.clear();
universe@15:     }
universe@34: 
universe@11:     @RequestMapping(method = HttpMethod.GET)
universe@42:     public ResponseType handle(HttpServletRequest req) {
universe@13: 
universe@86:         final var viewModel = new LanguageView();
universe@86:         viewModel.setLanguages(languages);
universe@86:         viewModel.setBrowserLanguage(req.getLocale());
universe@86:         viewModel.setCurrentLanguage((Locale)req.getSession().getAttribute(Constants.SESSION_ATTR_LANGUAGE));
universe@34: 
universe@86:         setViewModel(req, viewModel);
universe@13:         setStylesheet(req, "language");
universe@74:         setContentPage(req, "language");
universe@43:         return ResponseType.HTML;
universe@11:     }
universe@34: 
universe@15:     @RequestMapping(method = HttpMethod.POST)
universe@42:     public ResponseType switchLanguage(HttpServletRequest req, HttpServletResponse resp) {
universe@34: 
universe@15:         Optional<Locale> chosenLanguage = Optional.ofNullable(req.getParameter("language"))
universe@15:                 .map(Locale::forLanguageTag)
universe@15:                 .filter((l) -> !l.getLanguage().isEmpty());
universe@34: 
universe@15:         chosenLanguage.ifPresent((l) -> req.getSession().setAttribute(Constants.SESSION_ATTR_LANGUAGE, l));
universe@15:         chosenLanguage.ifPresent(resp::setLocale);
universe@34: 
universe@42:         return handle(req);
universe@15:     }
universe@7: }