For #141 #148 - set up locale cookie in special filter

src/main/java/org/traccar/web/server/model/GuiceServletConfig.java

@@ -57,6 +57,7 @@ protected void configureServlets() {
                 install(new JpaPersistModule(persistenceUnit));
 
                 filter("/traccar/*").through(PersistFilter.class);
+                filter("/", "/traccar.html", "/m/", "/m/index.html").through(LocaleFilter.class);
 
                 serve("/traccar/dataService").with(DataServiceImpl.class);
                 serve("/traccar/uiStateService").with(UIStateServiceImpl.class);

src/main/java/org/traccar/web/server/model/LocaleFilter.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 Vitaly Litvak ([email protected])
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.web.server.model;
+
+import com.google.inject.persist.Transactional;
+import org.traccar.web.shared.model.ApplicationSettings;
+
+import javax.inject.Inject;
+import javax.inject.Provider;
+import javax.inject.Singleton;
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Singleton
+public class LocaleFilter implements Filter {
+    @Inject
+    Provider<ApplicationSettings> applicationSettings;
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+    }
+
+    @Transactional
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
+        ((HttpServletResponse) servletResponse).addCookie(new Cookie("GWT_LOCALE", applicationSettings.get().getLanguage()));
+        filterChain.doFilter(servletRequest, servletResponse);
+    }
+
+    @Override
+    public void destroy() {
+    }
+}