i18n implementation (#55)

src/main/java/com/commafeed/frontend/rest/resources/AbstractREST.java

@@ -26,6 +26,7 @@ import org.apache.wicket.request.cycle.RequestCycle;
 import org.apache.wicket.util.crypt.Base64;
 
 import com.commafeed.backend.MetricsBean;
+import com.commafeed.backend.StartupBean;
 import com.commafeed.backend.dao.FeedCategoryDAO;
 import com.commafeed.backend.dao.FeedDAO;
 import com.commafeed.backend.dao.FeedEntryDAO;
@@ -89,6 +90,9 @@ public abstract class AbstractREST {
 	@Inject
 	UserService userService;
 
+	@Inject
+	StartupBean startupBean;
+
 	@Inject
 	UserSettingsDAO userSettingsDAO;
 

src/main/java/com/commafeed/frontend/rest/resources/ServerREST.java

@@ -18,6 +18,8 @@ public class ServerREST extends AbstractResourceREST {
 		ServerInfo infos = new ServerInfo();
 		infos.setAnnouncement(applicationSettingsService.get()
 				.getAnnouncement());
+		infos.getSupportedLanguages().putAll(
+				startupBean.getSupportedLanguages());
 		return infos;
 	}
 }

src/main/java/com/commafeed/frontend/rest/resources/UserREST.java

@@ -64,6 +64,10 @@ public class UserREST extends AbstractResourceREST {
 	public Response saveSettings(@ApiParam Settings settings) {
 		Preconditions.checkNotNull(settings);
 
+		if (startupBean.getSupportedLanguages().get(settings.getLanguage()) == null) {
+			settings.setLanguage("en");
+		}
+
 		UserSettings s = userSettingsDAO.findByUser(getUser());
 		if (s == null) {
 			s = new UserSettings();