I18n support

lightadmin-core/src/main/java/org/lightadmin/api/config/builder/EntityMetadataConfigurationUnitBuilder.java

@@ -31,6 +31,8 @@ public interface EntityMetadataConfigurationUnitBuilder extends ConfigurationUni
 
     EntityMetadataConfigurationUnitBuilder pluralName(String pluralName);
 
+    EntityMetadataConfigurationUnitBuilder i18n(boolean i18n);
+
     EntityMetadataConfigurationUnitBuilder field(String fieldName);
 
     EntityMetadataConfigurationUnitBuilder enumeration(EnumElement... elements);

lightadmin-core/src/main/java/org/lightadmin/api/config/builder/FieldSetConfigurationUnitBuilder.java

@@ -26,6 +26,8 @@ public interface FieldSetConfigurationUnitBuilder extends ConfigurationUnitBuild
 
     FieldSetConfigurationUnitBuilder caption(String caption);
 
+    FieldSetConfigurationUnitBuilder captionKey(String caption);
+
     FieldSetConfigurationUnitBuilder dynamic(String expression);
 
     FieldSetConfigurationUnitBuilder renderable(FieldValueRenderer<?> renderer);

lightadmin-core/src/main/java/org/lightadmin/api/config/builder/PersistentFieldSetConfigurationUnitBuilder.java

@@ -26,6 +26,8 @@ public interface PersistentFieldSetConfigurationUnitBuilder extends Configuratio
 
     PersistentFieldSetConfigurationUnitBuilder caption(String caption);
 
+    PersistentFieldSetConfigurationUnitBuilder captionKey(String captionKey);
+
     @Deprecated
     PersistentFieldSetConfigurationUnitBuilder enumeration(String... values);
 

lightadmin-core/src/main/java/org/lightadmin/api/config/builder/ScreenContextConfigurationUnitBuilder.java

@@ -22,4 +22,6 @@ public interface ScreenContextConfigurationUnitBuilder extends ConfigurationUnit
 
     ScreenContextConfigurationUnitBuilder screenName(String screenName);
 
+    ScreenContextConfigurationUnitBuilder i18n(boolean i18n);
+
 }

lightadmin-core/src/main/java/org/lightadmin/api/config/unit/EntityMetadataConfigurationUnit.java

@@ -28,4 +28,6 @@ public interface EntityMetadataConfigurationUnit extends ConfigurationUnit {
     String getSingularName();
 
     String getPluralName();
+
+    boolean i18n();
 }

lightadmin-core/src/main/java/org/lightadmin/api/config/unit/ScreenContextConfigurationUnit.java

@@ -20,4 +20,6 @@
 public interface ScreenContextConfigurationUnit extends ConfigurationUnit {
 
     String getScreenName();
+
+    boolean i18n();
 }

lightadmin-core/src/main/java/org/lightadmin/api/config/utils/EnumElement.java

@@ -23,10 +23,16 @@ public class EnumElement implements Serializable {
 
     private final Object value;
     private final String label;
+    private final boolean i18n;
 
     private EnumElement(Object value, String label) {
+       this(value,label, false);
+    }
+
+    private EnumElement(Object value, String label, boolean i18n) {
         this.value = value;
         this.label = label;
+        this.i18n = i18n;
     }
 
     public Object getValue() {
@@ -37,6 +43,10 @@ public String getLabel() {
         return label;
     }
 
+    public boolean isI18n() {
+        return i18n;
+    }
+
     public static EnumElement element(int value, String label) {
         return new EnumElement(value, label);
     }
@@ -49,4 +59,15 @@ public static EnumElement element(String value, String label) {
         return new EnumElement(value, label);
     }
 
+    public static EnumElement element(int value, String label, boolean i18n) {
+        return new EnumElement(value, label, i18n);
+    }
+
+    public static EnumElement element(long value, String label, boolean i18n) {
+        return new EnumElement(value, label, i18n);
+    }
+
+    public static EnumElement element(String value, String label, boolean i18n) {
+        return new EnumElement(value, label, i18n);
+    }
 }

lightadmin-core/src/main/java/org/lightadmin/api/config/utils/MessageSourceUtil.java

@@ -0,0 +1,24 @@
+package org.lightadmin.api.config.utils;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.MessageSource;
+import org.springframework.context.support.MessageSourceAccessor;
+import org.springframework.stereotype.Component;
+
+@Component
+public class MessageSourceUtil {
+	private static MessageSourceAccessor messages;
+
+	@Autowired
+	private void setMessageSource(MessageSource messageSource) {
+		MessageSourceUtil.messages = new MessageSourceAccessor(messageSource);
+	}
+
+	public static MessageSourceAccessor messages() {
+		return messages;
+	}
+
+	public static String getMessage(String code) {
+		return messages.getMessage(code);
+	}
+}

lightadmin-core/src/main/java/org/lightadmin/core/config/LightAdminConfiguration.java

@@ -17,6 +17,7 @@
 
 import java.io.File;
 import java.net.URI;
+import java.util.List;
 
 public interface LightAdminConfiguration {
 
@@ -42,4 +43,8 @@ public interface LightAdminConfiguration {
 
     boolean isFileStreamingEnabled();
 
+    boolean isI18n();
+
+    String[] getLanguages();
+
 }

lightadmin-core/src/main/java/org/lightadmin/core/config/StandardLightAdminConfiguration.java

@@ -39,6 +39,8 @@ public class StandardLightAdminConfiguration implements LightAdminConfiguration
     private final boolean fileStreaming;
     private final String basePackage;
     private final boolean demoMode;
+    private boolean i18n;
+    private String[] languages;
 
     public StandardLightAdminConfiguration(ServletContext servletContext) {
         this.basePackage = servletContext.getInitParameter(LIGHT_ADMINISTRATION_BASE_PACKAGE);
@@ -59,6 +61,12 @@ public StandardLightAdminConfiguration(ServletContext servletContext) {
         } else {
             this.securityLogoutUrl = servletContext.getContextPath() + defaultIfBlank(servletContext.getInitParameter(LIGHT_ADMINISTRATION_SECURITY_LOGOUT_URL), "#");
         }
+
+        this.i18n = BooleanUtils.toBoolean(servletContext.getInitParameter(LIGHT_ADMINISTRATION_I18N));
+
+        if(i18n) {
+            this.languages = servletContext.getInitParameter(LIGHT_ADMINISTRATION_LANGUAGES).split(",");
+        }
     }
 
     @Override
@@ -81,6 +89,16 @@ public boolean isFileStreamingEnabled() {
         return fileStreaming;
     }
 
+    @Override
+    public boolean isI18n() {
+        return this.i18n;
+    }
+
+    @Override
+    public String[] getLanguages() {
+        return this.languages;
+    }
+
     @Override
     public String getBackToSiteUrl() {
         return backToSiteUrl;

lightadmin-core/src/main/java/org/lightadmin/core/config/context/LightAdminContextConfiguration.java

@@ -26,6 +26,8 @@
 import org.lightadmin.core.web.support.FileResourceLoader;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.MessageSource;
+import org.springframework.context.MessageSourceResolvable;
+import org.springframework.context.NoSuchMessageException;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
@@ -38,10 +40,9 @@
 import org.springframework.web.multipart.commons.CommonsMultipartResolver;
 import org.springframework.web.servlet.HandlerExceptionResolver;
 import org.springframework.web.servlet.ViewResolver;
-import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
-import org.springframework.web.servlet.config.annotation.EnableWebMvc;
-import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+import org.springframework.web.servlet.config.annotation.*;
+import org.springframework.web.servlet.i18n.CookieLocaleResolver;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 import org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver;
 import org.springframework.web.servlet.view.tiles3.SpringBeanPreparerFactory;
 import org.springframework.web.servlet.view.tiles3.TilesConfigurer;
@@ -50,6 +51,7 @@
 import javax.servlet.ServletContext;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Locale;
 
 import static org.lightadmin.core.util.LightAdminConfigurationUtils.LIGHT_ADMIN_CUSTOM_RESOURCE_CLASSPATH_LOCATION;
 import static org.springframework.web.servlet.DispatcherServlet.VIEW_RESOLVER_BEAN_NAME;
@@ -60,7 +62,8 @@
         LightAdminDomainConfiguration.class,
         LightAdminRemoteConfiguration.class,
         LightAdminRepositoryRestMvcConfiguration.class,
-        LightAdminViewConfiguration.class
+        LightAdminViewConfiguration.class,
+        LightAdminUtilsConfiguration.class
 })
 @EnableWebMvc
 public class LightAdminContextConfiguration extends WebMvcConfigurerAdapter {
@@ -128,10 +131,30 @@ public LocalValidatorFactoryBean validator() {
         return validator;
     }
 
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(localeChangeInterceptor());
+    }
+
+    @Bean
+    public LocaleChangeInterceptor localeChangeInterceptor() {
+        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
+        localeChangeInterceptor.setParamName("language");
+        return localeChangeInterceptor;
+    }
+
+    @Bean(name = "localeResolver")
+    public CookieLocaleResolver localeResolver() {
+        CookieLocaleResolver localeResolver = new CookieLocaleResolver();
+        localeResolver.setDefaultLocale(Locale.ENGLISH);
+        localeResolver.setCookieName("adminLocale");
+        return localeResolver;
+    }
+
     @Bean
     public MessageSource messageSource() {
         ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
-        messageSource.setBasename("classpath:messages");
+        messageSource.setBasenames("classpath:messages","classpath:i18n/messages");
         messageSource.setDefaultEncoding("UTF-8");
         messageSource.setCacheSeconds(0);
         messageSource.setFallbackToSystemLocale(false);

lightadmin-core/src/main/java/org/lightadmin/core/config/context/LightAdminUtilsConfiguration.java

@@ -0,0 +1,7 @@
+package org.lightadmin.core.config.context;
+
+import org.springframework.context.annotation.ComponentScan;
+
+@ComponentScan(basePackages = {"org.lightadmin.api.config.utils"})
+public class LightAdminUtilsConfiguration {
+}

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/common/AbstractFieldSetConfigurationBuilder.java

@@ -56,6 +56,17 @@ public B caption(final String caption) {
         assertFieldMetadataIsNotNull();
 
         currentFieldMetadata.setName(caption);
+        currentFieldMetadata.setI18n(false);
+
+        return (B) this;
+    }
+
+    @SuppressWarnings("unchecked")
+    public B captionKey(final String caption) {
+        assertFieldMetadataIsNotNull();
+
+        currentFieldMetadata.setName(caption);
+        currentFieldMetadata.setI18n(true);
 
         return (B) this;
     }

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/common/PersistentFieldSetConfigurationUnitBuilderAdapter.java

@@ -44,6 +44,12 @@ public PersistentFieldSetConfigurationUnitBuilder caption(final String caption)
         return this;
     }
 
+    @Override
+    public PersistentFieldSetConfigurationUnitBuilder captionKey(final String captionKey) {
+        fieldSetConfigurationUnitBuilder.captionKey(captionKey);
+        return this;
+    }
+
     @Deprecated
     @Override
     public PersistentFieldSetConfigurationUnitBuilder enumeration(String... values) {

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/configuration/DefaultEntityMetadataConfigurationUnit.java

@@ -28,6 +28,7 @@ public class DefaultEntityMetadataConfigurationUnit extends DefaultFieldSetConfi
 
     private String singularName;
     private String pluralName;
+    private boolean i18n;
 
     DefaultEntityMetadataConfigurationUnit(Class<?> domainType) {
         super(domainType, DomainConfigurationUnitType.CONFIGURATION);
@@ -74,4 +75,12 @@ public DomainConfigurationUnitType getParentUnitType() {
         return null;
     }
 
+    @Override
+    public boolean i18n() {
+        return i18n;
+    }
+
+    public void setI18n(boolean i18n) {
+        this.i18n = i18n;
+    }
 }

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/configuration/DefaultEntityMetadataConfigurationUnitBuilder.java

@@ -58,6 +58,12 @@ public EntityMetadataConfigurationUnitBuilder pluralName(final String pluralName
         return this;
     }
 
+    @Override
+    public EntityMetadataConfigurationUnitBuilder i18n(boolean i18n) {
+        configurationUnit.setI18n(i18n);
+        return this;
+    }
+
     @Override
     public EntityMetadataConfigurationUnitBuilder repositoryEventListener(Class<? extends AbstractRepositoryEventListener> listenerClass) {
         configurationUnit.setRepositoryEventListener(listenerClass);

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/context/DefaultScreenContextConfigurationUnit.java

@@ -22,18 +22,29 @@
 public class DefaultScreenContextConfigurationUnit extends DomainTypeConfigurationUnit implements ScreenContextConfigurationUnit {
 
     private final String screenName;
+    private final boolean i18n;
 
     DefaultScreenContextConfigurationUnit(Class<?> domainType, final String screenName) {
+        this(domainType, screenName, false);
+    }
+
+    DefaultScreenContextConfigurationUnit(Class<?> domainType, final String screenName, final boolean i18n) {
         super(domainType);
 
         this.screenName = screenName;
+        this.i18n = i18n;
     }
 
     @Override
     public String getScreenName() {
         return screenName;
     }
 
+    @Override
+    public boolean i18n() {
+        return i18n;
+    }
+
     @Override
     public DomainConfigurationUnitType getDomainConfigurationUnitType() {
         return DomainConfigurationUnitType.SCREEN_CONTEXT;

lightadmin-core/src/main/java/org/lightadmin/core/config/domain/context/DefaultScreenContextConfigurationUnitBuilder.java

@@ -22,11 +22,13 @@
 public class DefaultScreenContextConfigurationUnitBuilder extends DomainTypeConfigurationUnitBuilder<ScreenContextConfigurationUnit> implements ScreenContextConfigurationUnitBuilder {
 
     private String screenName;
+    private boolean i18n;
 
     public DefaultScreenContextConfigurationUnitBuilder(final Class<?> domainType) {
         super(domainType);
 
         this.screenName = domainType.getSimpleName();
+        this.i18n = false;
     }
 
     @Override
@@ -35,8 +37,14 @@ public ScreenContextConfigurationUnitBuilder screenName(final String screenName)
         return this;
     }
 
+    @Override
+    public ScreenContextConfigurationUnitBuilder i18n(boolean i18n) {
+        this.i18n = i18n;
+        return this;
+    }
+
     @Override
     public ScreenContextConfigurationUnit build() {
-        return new DefaultScreenContextConfigurationUnit(getDomainType(), screenName);
+        return new DefaultScreenContextConfigurationUnit(getDomainType(), screenName, i18n);
     }
 }