Frooodle/license (#1994)

src/main/java/stirling/software/SPDF/config/LocaleConfiguration.java

@@ -0,0 +1,64 @@
+package stirling.software.SPDF.config;
+
+import java.util.Locale;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
+
+import stirling.software.SPDF.model.ApplicationProperties;
+
+@Configuration
+public class LocaleConfiguration implements WebMvcConfigurer {
+
+    @Autowired ApplicationProperties applicationProperties;
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(localeChangeInterceptor());
+        registry.addInterceptor(new CleanUrlInterceptor());
+    }
+
+    @Bean
+    public LocaleChangeInterceptor localeChangeInterceptor() {
+        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
+        lci.setParamName("lang");
+        return lci;
+    }
+
+    @Bean
+    public LocaleResolver localeResolver() {
+        SessionLocaleResolver slr = new SessionLocaleResolver();
+
+        String appLocaleEnv = applicationProperties.getSystem().getDefaultLocale();
+        Locale defaultLocale =
+                Locale.UK; // Fallback to UK locale if environment variable is not set
+
+        if (appLocaleEnv != null && !appLocaleEnv.isEmpty()) {
+            Locale tempLocale = Locale.forLanguageTag(appLocaleEnv);
+            String tempLanguageTag = tempLocale.toLanguageTag();
+
+            if (appLocaleEnv.equalsIgnoreCase(tempLanguageTag)) {
+                defaultLocale = tempLocale;
+            } else {
+                tempLocale = Locale.forLanguageTag(appLocaleEnv.replace("_", "-"));
+                tempLanguageTag = tempLocale.toLanguageTag();
+
+                if (appLocaleEnv.equalsIgnoreCase(tempLanguageTag)) {
+                    defaultLocale = tempLocale;
+                } else {
+                    System.err.println(
+                            "Invalid APP_LOCALE environment variable value. Falling back to default Locale.UK.");
+                }
+            }
+        }
+
+        slr.setDefaultLocale(defaultLocale);
+        return slr;
+    }
+}