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115 lines
3.7 KiB
115 lines
3.7 KiB
/*
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This file is part of Airsonic.
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Airsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Airsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Airsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Airsonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.airsonic.player.i18n;
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import org.airsonic.player.domain.UserSettings;
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import org.airsonic.player.service.SecurityService;
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import org.airsonic.player.service.SettingsService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Locale;
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import java.util.Set;
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/**
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* Locale resolver implementation which returns the locale selected in the settings.
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*
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* @author Sindre Mehus
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*/
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@Service
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public class LocaleResolver implements org.springframework.web.servlet.LocaleResolver {
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@Autowired
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private SecurityService securityService;
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@Autowired
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private SettingsService settingsService;
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private Set<Locale> locales;
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/**
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* Resolve the current locale via the given request.
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*
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* @param request Request to be used for resolution.
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* @return The current locale.
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*/
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public Locale resolveLocale(HttpServletRequest request) {
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Locale locale = (Locale) request.getAttribute("airsonic.locale");
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if (locale != null) {
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return locale;
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}
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// Optimization: Cache locale in the request.
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locale = doResolveLocale(request);
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request.setAttribute("airsonic.locale", locale);
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return locale;
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}
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private Locale doResolveLocale(HttpServletRequest request) {
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Locale locale = null;
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// Look for user-specific locale.
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String username = securityService.getCurrentUsername(request);
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if (username != null) {
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UserSettings userSettings = settingsService.getUserSettings(username);
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if (userSettings != null) {
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locale = userSettings.getLocale();
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}
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}
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if (locale != null && localeExists(locale)) {
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return locale;
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}
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// Return system locale.
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locale = settingsService.getLocale();
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return localeExists(locale) ? locale : Locale.ENGLISH;
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}
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/**
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* Returns whether the given locale exists.
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* @param locale The locale.
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* @return Whether the locale exists.
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*/
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private synchronized boolean localeExists(Locale locale) {
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// Lazily create set of locales.
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if (locales == null) {
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locales = new HashSet<Locale>(Arrays.asList(settingsService.getAvailableLocales()));
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}
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return locales.contains(locale);
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}
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public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
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throw new UnsupportedOperationException("Cannot change locale - use a different locale resolution strategy");
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}
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public void setSecurityService(SecurityService securityService) {
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this.securityService = securityService;
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}
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public void setSettingsService(SettingsService settingsService) {
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this.settingsService = settingsService;
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}
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}
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