1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/main/java/de/uapcore/lightpit/modules/LanguageModule.java Sat May 09 14:26:31 2020 +0200
1.3 @@ -0,0 +1,118 @@
1.4 +/*
1.5 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
1.6 + *
1.7 + * Copyright 2018 Mike Becker. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions are met:
1.11 + *
1.12 + * 1. Redistributions of source code must retain the above copyright
1.13 + * notice, this list of conditions and the following disclaimer.
1.14 + *
1.15 + * 2. Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in the
1.17 + * documentation and/or other materials provided with the distribution.
1.18 + *
1.19 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.20 + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.21 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.22 + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
1.23 + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.24 + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.25 + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.26 + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.27 + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.28 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.29 + * POSSIBILITY OF SUCH DAMAGE.
1.30 + *
1.31 + */
1.32 +package de.uapcore.lightpit.modules;
1.33 +
1.34 +import de.uapcore.lightpit.LightPITModule;
1.35 +import de.uapcore.lightpit.AbstractLightPITServlet;
1.36 +import de.uapcore.lightpit.Constants;
1.37 +import de.uapcore.lightpit.Functions;
1.38 +import de.uapcore.lightpit.HttpMethod;
1.39 +import javax.servlet.annotation.WebServlet;
1.40 +import javax.servlet.http.HttpServletRequest;
1.41 +import javax.servlet.http.HttpServletResponse;
1.42 +import de.uapcore.lightpit.RequestMapping;
1.43 +import de.uapcore.lightpit.ResponseType;
1.44 +import java.util.ArrayList;
1.45 +import java.util.IllformedLocaleException;
1.46 +import java.util.List;
1.47 +import java.util.Locale;
1.48 +import java.util.Optional;
1.49 +import javax.servlet.ServletException;
1.50 +import org.slf4j.Logger;
1.51 +import org.slf4j.LoggerFactory;
1.52 +
1.53 +
1.54 +@LightPITModule(
1.55 + bundleBaseName = "localization.language",
1.56 + modulePath = "language"
1.57 +)
1.58 +@WebServlet(
1.59 + name = "LanguageModule",
1.60 + urlPatterns = "/language/*"
1.61 +)
1.62 +public final class LanguageModule extends AbstractLightPITServlet {
1.63 +
1.64 + private static final Logger LOG = LoggerFactory.getLogger(LanguageModule.class);
1.65 +
1.66 + private final List<Locale> languages = new ArrayList<>();
1.67 +
1.68 + @Override
1.69 + public void init() throws ServletException {
1.70 + super.init();
1.71 +
1.72 + Optional<String[]> langs = Functions.availableLanguages(getServletContext());
1.73 + if (langs.isPresent()) {
1.74 + for (String lang : langs.get()) {
1.75 + try {
1.76 + Locale locale = Locale.forLanguageTag(lang);
1.77 + if (locale.getLanguage().isEmpty()) {
1.78 + throw new IllformedLocaleException();
1.79 + }
1.80 + languages.add(locale);
1.81 + } catch (IllformedLocaleException ex) {
1.82 + LOG.warn("Specified lanaguge {} in context parameter cannot be mapped to an existing locale - skipping.", lang);
1.83 + }
1.84 + }
1.85 +
1.86 + } else {
1.87 + languages.add(Locale.ENGLISH);
1.88 + LOG.warn("Context parameter 'available-languges' not found. Only english will be available.");
1.89 + }
1.90 + }
1.91 +
1.92 + @Override
1.93 + public void destroy() {
1.94 + super.destroy();
1.95 + languages.clear();
1.96 + }
1.97 +
1.98 + @RequestMapping(method = HttpMethod.GET)
1.99 + public ResponseType handle(HttpServletRequest req, HttpServletResponse resp) {
1.100 +
1.101 + req.setAttribute("languages", languages);
1.102 + req.setAttribute("browserLanguage", req.getLocale());
1.103 +
1.104 + setStylesheet(req, "language");
1.105 + setDynamicFragment(req, "language");
1.106 + return ResponseType.HTML_FULL;
1.107 + }
1.108 +
1.109 + @RequestMapping(method = HttpMethod.POST)
1.110 + public ResponseType switchLanguage(HttpServletRequest req, HttpServletResponse resp) {
1.111 +
1.112 + Optional<Locale> chosenLanguage = Optional.ofNullable(req.getParameter("language"))
1.113 + .map(Locale::forLanguageTag)
1.114 + .filter((l) -> !l.getLanguage().isEmpty());
1.115 +
1.116 + chosenLanguage.ifPresent((l) -> req.getSession().setAttribute(Constants.SESSION_ATTR_LANGUAGE, l));
1.117 + chosenLanguage.ifPresent(resp::setLocale);
1.118 +
1.119 + return handle(req, resp);
1.120 + }
1.121 +}
