Sat, 23 May 2020 14:13:09 +0200
bloat removal 3/3 - LightPITModule annotation and ModuleManager
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2018 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 package de.uapcore.lightpit.modules;
31 import de.uapcore.lightpit.*;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
35 import javax.servlet.ServletException;
36 import javax.servlet.annotation.WebServlet;
37 import javax.servlet.http.HttpServletRequest;
38 import javax.servlet.http.HttpServletResponse;
39 import java.util.*;
41 @WebServlet(
42 name = "LanguageModule",
43 urlPatterns = "/language/*"
44 )
45 public final class LanguageModule extends AbstractLightPITServlet {
47 private static final Logger LOG = LoggerFactory.getLogger(LanguageModule.class);
49 private final List<Locale> languages = new ArrayList<>();
51 @Override
52 protected String getResourceBundleName() {
53 return "localization.language";
54 }
56 @Override
57 public void init() throws ServletException {
58 super.init();
60 Optional<String[]> langs = Functions.availableLanguages(getServletContext());
61 if (langs.isPresent()) {
62 for (String lang : langs.get()) {
63 try {
64 Locale locale = Locale.forLanguageTag(lang);
65 if (locale.getLanguage().isEmpty()) {
66 throw new IllformedLocaleException();
67 }
68 languages.add(locale);
69 } catch (IllformedLocaleException ex) {
70 LOG.warn("Specified language {} in context parameter cannot be mapped to an existing locale - skipping.", lang);
71 }
72 }
74 } else {
75 languages.add(Locale.ENGLISH);
76 LOG.warn("Context parameter 'available-languages' not found. Only english will be available.");
77 }
78 }
80 @Override
81 public void destroy() {
82 super.destroy();
83 languages.clear();
84 }
86 @RequestMapping(method = HttpMethod.GET)
87 public ResponseType handle(HttpServletRequest req) {
89 req.setAttribute("languages", languages);
90 req.setAttribute("browserLanguage", req.getLocale());
92 setStylesheet(req, "language");
93 setContentPage(req, "language");
94 return ResponseType.HTML;
95 }
97 @RequestMapping(method = HttpMethod.POST)
98 public ResponseType switchLanguage(HttpServletRequest req, HttpServletResponse resp) {
100 Optional<Locale> chosenLanguage = Optional.ofNullable(req.getParameter("language"))
101 .map(Locale::forLanguageTag)
102 .filter((l) -> !l.getLanguage().isEmpty());
104 chosenLanguage.ifPresent((l) -> req.getSession().setAttribute(Constants.SESSION_ATTR_LANGUAGE, l));
105 chosenLanguage.ifPresent(resp::setLocale);
107 return handle(req);
108 }
109 }