add vue internationalization

create vue internalization module using i18next 23.14.0 with language detector
see https://i18next.github.io/i18next-vue/introduction.html

src/main/java/tech/jhipster/lite/generator/client/react/i18n/infrastructure/primary/ReactI18nModuleConfiguration.java

@@ -15,7 +15,7 @@
 class ReactI18nModuleConfiguration {
 
   @Bean
-  JHipsterModuleResource i18nModule(ReactI18nApplicationService i18n) {
+  JHipsterModuleResource reactI18nModule(ReactI18nApplicationService i18n) {
     return JHipsterModuleResource.builder()
       .slug(REACT_I18N)
       .propertiesDefinition(JHipsterModulePropertiesDefinition.builder().build())

src/main/java/tech/jhipster/lite/generator/client/vue/i18n/application/VueI18nApplicationService.java

@@ -0,0 +1,20 @@
+package tech.jhipster.lite.generator.client.vue.i18n.application;
+
+import org.springframework.stereotype.Service;
+import tech.jhipster.lite.generator.client.vue.i18n.domain.VueI18nModuleFactory;
+import tech.jhipster.lite.module.domain.JHipsterModule;
+import tech.jhipster.lite.module.domain.properties.JHipsterModuleProperties;
+
+@Service
+public class VueI18nApplicationService {
+
+  private final VueI18nModuleFactory factory;
+
+  public VueI18nApplicationService() {
+    factory = new VueI18nModuleFactory();
+  }
+
+  public JHipsterModule buildModule(JHipsterModuleProperties properties) {
+    return factory.buildModule(properties);
+  }
+}

src/main/java/tech/jhipster/lite/generator/client/vue/i18n/domain/VueI18nModuleFactory.java

@@ -0,0 +1,77 @@
+package tech.jhipster.lite.generator.client.vue.i18n.domain;
+
+import static tech.jhipster.lite.module.domain.JHipsterModule.*;
+
+import tech.jhipster.lite.module.domain.JHipsterModule;
+import tech.jhipster.lite.module.domain.file.JHipsterSource;
+import tech.jhipster.lite.module.domain.packagejson.VersionSource;
+import tech.jhipster.lite.module.domain.properties.JHipsterModuleProperties;
+import tech.jhipster.lite.shared.error.domain.Assert;
+
+public class VueI18nModuleFactory {
+
+  private static final JHipsterSource APP_SOURCE = from("client/common/i18n");
+  private static final JHipsterSource COMMON_CONTEXT_SOURCE = from("client/common/i18n/app");
+  private static final JHipsterSource ASSETS_SOURCE = from("client/common/i18n/app/locales");
+  private static final JHipsterSource TEST_SOURCE = from("client/vue/i18n/src/test");
+
+  private static final String INDEX = "src/main/webapp/app/";
+  private static final String INDEX_TEST = "src/test/";
+
+  private static final String PROVIDER_NEEDLE = "// jhipster-needle-main-ts-provider";
+
+  public JHipsterModule buildModule(JHipsterModuleProperties properties) {
+    Assert.notNull("properties", properties);
+
+    //@formatter:off
+    return moduleBuilder(properties)
+      .packageJson()
+      .addDependency(packageName("i18next"), VersionSource.COMMON)
+      .addDependency(packageName("i18next-vue"), VersionSource.VUE)
+      .addDependency(packageName("i18next-browser-languagedetector"), VersionSource.COMMON)
+      .and()
+      .files()
+      .batch(APP_SOURCE, to(INDEX))
+        .addFile("i18n.ts")
+        .addFile("Translations.ts")
+        .and()
+      .batch(COMMON_CONTEXT_SOURCE, to(INDEX + "common/"))
+        .addFile("CommonTranslations.ts")
+        .and()
+      .batch(ASSETS_SOURCE, to(INDEX + "common/locales/"))
+        .addFile("en.ts")
+        .addFile("fr.ts")
+      .and()
+      .batch(TEST_SOURCE, to(INDEX_TEST))
+        .addFile("setupTests.ts")
+        .and()
+      .and()
+      .mandatoryReplacements()
+        .in(path(INDEX + "main.ts"))
+          .add(lineBeforeText("// jhipster-needle-main-ts-import"), "import i18next from './i18n';")
+          .add(lineBeforeText("// jhipster-needle-main-ts-import"), "import I18NextVue from 'i18next-vue';")
+          .add(lineBeforeText(PROVIDER_NEEDLE
+          ), "app.use(I18NextVue, { i18next });")
+        .and()
+        .in(path(INDEX + "/common/primary/homepage/Homepage.html"))
+          .add(lineAfterRegex("Vue 3 \\+ TypeScript \\+ Vite"), properties.indentation().times(1) + "<h2 v-html=\"$t('common.translationEnabled')\"></h2>")
+        .and()
+        .in(path("./vitest.config.ts"))
+          .add(lineAfterRegex("test:"), properties.indentation().times(2) + "setupFiles: ['./src/test/setupTests.ts'],")
+          .and()
+        .in(path(INDEX_TEST + "webapp/unit/common/primary/homepage/Homepage.spec.ts"))
+          .add(append(), LINE_BREAK + """
+          describe('App I18next', () => {
+            it('should renders with translation', () => {
+              wrap();
+
+              expect(wrapper.text()).toContain("translationEnabled");
+            });
+          });
+          """)
+        .and()
+      .and()
+      .build();
+    //@formatter:off
+  }
+}

src/main/java/tech/jhipster/lite/generator/client/vue/i18n/infrastructure/primary/VueI18nModuleConfiguration.java

@@ -0,0 +1,27 @@
+package tech.jhipster.lite.generator.client.vue.i18n.infrastructure.primary;
+
+import static tech.jhipster.lite.generator.slug.domain.JHLiteFeatureSlug.CLIENT_INTERNATIONALIZATION;
+import static tech.jhipster.lite.generator.slug.domain.JHLiteModuleSlug.VUE_CORE;
+import static tech.jhipster.lite.generator.slug.domain.JHLiteModuleSlug.VUE_I18N;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import tech.jhipster.lite.generator.client.vue.i18n.application.VueI18nApplicationService;
+import tech.jhipster.lite.module.domain.resource.JHipsterModuleOrganization;
+import tech.jhipster.lite.module.domain.resource.JHipsterModulePropertiesDefinition;
+import tech.jhipster.lite.module.domain.resource.JHipsterModuleResource;
+
+@Configuration
+class VueI18nModuleConfiguration {
+
+  @Bean
+  JHipsterModuleResource vueI18nModule(VueI18nApplicationService i18n) {
+    return JHipsterModuleResource.builder()
+      .slug(VUE_I18N)
+      .propertiesDefinition(JHipsterModulePropertiesDefinition.builder().build())
+      .apiDoc("Frontend - Vue", "Add vue internationalization")
+      .organization(JHipsterModuleOrganization.builder().feature(CLIENT_INTERNATIONALIZATION).addDependency(VUE_CORE).build())
+      .tags("client", "vue", "i18n")
+      .factory(i18n::buildModule);
+  }
+}

src/main/java/tech/jhipster/lite/generator/client/vue/i18n/package-info.java

@@ -0,0 +1,2 @@
+@tech.jhipster.lite.BusinessContext
+package tech.jhipster.lite.generator.client.vue.i18n;

src/main/java/tech/jhipster/lite/generator/slug/domain/JHLiteModuleSlug.java

@@ -147,6 +147,7 @@ public enum JHLiteModuleSlug implements JHipsterModuleSlugFactory {
   SVELTE_CORE("svelte-core"),
   TYPESCRIPT("typescript"),
   VUE_CORE("vue-core"),
+  VUE_I18N("vue-i18next"),
   VUE_PINIA("vue-pinia"),
   TS_PAGINATION_DOMAIN("ts-pagination-domain"),
   TS_REST_PAGINATION("ts-rest-pagination");

src/main/resources/generator/client/common/i18n/Translations.ts

@@ -0,0 +1,33 @@
+import type { Resource, ResourceKey, ResourceLanguage } from 'i18next';
+
+export type Translation = Record<string, unknown>;
+export type Translations = Record<string, Translation>;
+
+const toLanguage = ([key, value]: [string, ResourceKey]): [string, ResourceLanguage] => [
+  key,
+  {
+    translation: value,
+  },
+];
+
+const mergeTranslations = (translations: Array<Translations>): Translations =>
+  translations
+    .flatMap(translations => Object.entries(translations))
+    .reduce(
+      (acc, [key, translation]) => ({
+        ...acc,
+        [key]: acc[key] ? { ...acc[key], ...translation } : translation,
+      }),
+      {} as Translations,
+    );
+
+export const toTranslationResources = (...translations: Array<Translations>): Resource =>
+  Object.entries(mergeTranslations(translations))
+    .map(toLanguage)
+    .reduce(
+      (acc, current) => ({
+        ...acc,
+        [current[0]]: current[1],
+      }),
+      {},
+    );

src/main/resources/generator/client/common/i18n/app/CommonTranslations.ts

@@ -0,0 +1,5 @@
+import type { Translations } from '@/Translations';
+import { en } from './locales/en';
+import { fr } from './locales/fr';
+
+export const commonTranslations: Translations = { fr, en };

src/main/resources/generator/client/common/i18n/app/locales/en.ts

@@ -0,0 +1,7 @@
+import type { Translation } from '@/Translations';
+
+export const en: Translation = {
+  common: {
+    translationEnabled: 'Internationalization enabled',
+  },
+};

src/main/resources/generator/client/common/i18n/app/locales/fr.ts

@@ -0,0 +1,7 @@
+import type { Translation } from '@/Translations';
+
+export const fr: Translation = {
+  common: {
+    translationEnabled: 'Internationalisation activée',
+  },
+};

src/main/resources/generator/client/common/i18n/i18n.ts

@@ -0,0 +1,15 @@
+import i18n from 'i18next';
+import LanguageDetector from 'i18next-browser-languagedetector';
+import { commonTranslations } from './common/CommonTranslations';
+import { toTranslationResources } from './Translations';
+
+i18n.use(LanguageDetector).init({
+  fallbackLng: 'en',
+  debug: false,
+  interpolation: {
+    escapeValue: false,
+  },
+  resources: toTranslationResources(commonTranslations),
+});
+
+export default i18n;

src/main/resources/generator/client/vue/i18n/src/test/setupTests.ts

@@ -0,0 +1,5 @@
+import { config } from '@vue/test-utils';
+
+config.global.mocks = {
+  $t: msg => msg,
+};

src/main/resources/generator/dependencies/vue/package.json

@@ -5,6 +5,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "axios": "1.7.7",
+    "i18next-vue": "5.0.0",
     "pinia": "2.2.2",
     "pinia-plugin-persistedstate": "3.2.3",
     "vue": "3.4.38",

src/test/features/client/vue-i18n.feature

@@ -0,0 +1,17 @@
+Feature: Vue i18n
+
+  Scenario: Should apply vue i18n module to vue
+    When I apply modules to default project
+      | init        |
+      | vue-core    |
+      | vue-i18next |
+    Then I should have files in "src/main/webapp/app"
+      | i18n.ts         |
+      | Translations.ts |
+    And I should have files in "src/main/webapp/app/common/"
+      | CommonTranslations.ts |
+    And I should have files in "src/main/webapp/app/common/locales"
+      | fr.ts |
+      | en.ts |
+    And I should have files in "src/test"
+      | setupTests.ts |