1 files changed, 104 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/i18n/SubsonicLocaleResolver.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/i18n/SubsonicLocaleResolver.java
new file mode 100644
index 00000000..231ad6e7
--- /dev/null
+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/i18n/SubsonicLocaleResolver.java
@@ -0,0 +1,104 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Subsonic is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2009 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.i18n;
+
+import net.sourceforge.subsonic.service.*;
+import net.sourceforge.subsonic.domain.*;
+import org.springframework.web.servlet.*;
+
+import javax.servlet.http.*;
+import java.util.*;
+
+/**
+ * Locale resolver implementation which returns the locale selected in the settings.
+ *
+ * @author Sindre Mehus
+ */
+public class SubsonicLocaleResolver implements LocaleResolver {
+
+    private SecurityService securityService;
+    private SettingsService settingsService;
+    private Set<Locale> locales;
+
+    /**
+    * Resolve the current locale via the given request.
+    *
+    * @param request Request to be used for resolution.
+    * @return The current locale.
+    */
+    public Locale resolveLocale(HttpServletRequest request) {
+        Locale locale = (Locale) request.getAttribute("subsonic.locale");
+        if (locale != null) {
+            return locale;
+        }
+
+        // Optimization: Cache locale in the request.
+        locale = doResolveLocale(request);
+        request.setAttribute("subsonic.locale", locale);
+
+        return locale;
+    }
+
+    private Locale doResolveLocale(HttpServletRequest request) {
+        Locale locale = null;
+
+        // Look for user-specific locale.
+        String username = securityService.getCurrentUsername(request);
+        if (username != null) {
+            UserSettings userSettings = settingsService.getUserSettings(username);
+            if (userSettings != null) {
+                locale = userSettings.getLocale();
+            }
+        }
+
+        if (locale != null && localeExists(locale)) {
+            return locale;
+        }
+
+        // Return system locale.
+        locale = settingsService.getLocale();
+        return localeExists(locale) ? locale : Locale.ENGLISH;
+    }
+
+    /**
+     * Returns whether the given locale exists.
+     * @param locale The locale.
+     * @return Whether the locale exists.
+     */
+    private synchronized boolean localeExists(Locale locale) {
+        // Lazily create set of locales.
+        if (locales == null) {
+            locales = new HashSet<Locale>(Arrays.asList(settingsService.getAvailableLocales()));
+        }
+
+        return locales.contains(locale);
+    }
+
+    public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
+        throw new UnsupportedOperationException("Cannot change locale - use a different locale resolution strategy");
+    }
+
+    public void setSecurityService(SecurityService securityService) {
+        this.securityService = securityService;
+    }
+
+    public void setSettingsService(SettingsService settingsService) {
+        this.settingsService = settingsService;
+    }
+}