add i18n for multi language purpose

apps/e-commerce/src/guarantee/dto/guarantee.dto.ts

@@ -1,5 +1,6 @@
 import { ApiProperty } from '@nestjs/swagger';
 import { replaceCharacterSlug } from '@rahino/commontools';
+import { I18nTranslations } from 'apps/main/src/generated/i18n.generated';
 import { AutoMap } from 'automapper-classes';
 import { Transform } from 'class-transformer';
 import {
@@ -9,11 +10,16 @@ import {
   MaxLength,
   MinLength,
 } from 'class-validator';
+import { i18nValidationMessage } from 'nestjs-i18n';
 
 export class GuaranteeDto {
   @MinLength(3)
   @MaxLength(256)
-  @IsNotEmpty()
+  @IsNotEmpty({
+    message: i18nValidationMessage<I18nTranslations>(
+      'core.validation.is_not_empty',
+    ),
+  })
   @AutoMap()
   name: string;
 

apps/e-commerce/src/guarantee/guarantee.service.ts

@@ -18,6 +18,8 @@ import * as fs from 'fs';
 import { User } from '@rahino/database/models/core/user.entity';
 import { MinioClientService } from '@rahino/minio-client';
 import { ThumbnailService } from '@rahino/thumbnail';
+import { I18nContext, I18nService } from 'nestjs-i18n';
+import { I18nTranslations } from 'apps/main/src/generated/i18n.generated';
 
 @Injectable()
 export class GuaranteeService {
@@ -29,6 +31,7 @@ export class GuaranteeService {
     @InjectMapper()
     private readonly mapper: Mapper,
     private readonly thumbnailService: ThumbnailService,
+    private readonly i18n: I18nService<I18nTranslations>,
   ) {}
 
   async findAll(filter: GetGuaranteeDto) {
@@ -108,7 +111,11 @@ export class GuaranteeService {
         .build(),
     );
     if (!guarantee) {
-      throw new NotFoundException('the item with this given id not founded!');
+      throw new NotFoundException(
+        this.i18n.t('core.not_found_id', {
+          lang: I18nContext.current().lang,
+        }),
+      );
     }
     return {
       result: guarantee,
@@ -131,7 +138,9 @@ export class GuaranteeService {
     );
     if (item) {
       throw new BadRequestException(
-        'the item with this slug is exists before !',
+        this.i18n.translate('core.the_given_slug_is_exists_before', {
+          lang: I18nContext.current().lang,
+        }),
       );
     }
 
@@ -167,7 +176,11 @@ export class GuaranteeService {
         .build(),
     );
     if (!item) {
-      throw new NotFoundException('the item with this given id not founded!');
+      throw new NotFoundException(
+        this.i18n.t('core.not_found_id', {
+          lang: I18nContext.current().lang,
+        }),
+      );
     }
     const searchSlug = await this.repository.findOne(
       new QueryOptionsBuilder()
@@ -189,7 +202,9 @@ export class GuaranteeService {
     );
     if (searchSlug) {
       throw new BadRequestException(
-        'the item with this slug is exists before !',
+        this.i18n.t('core.the_given_slug_is_exists_before', {
+          lang: I18nContext.current().lang,
+        }),
       );
     }
     const mappedItem = this.mapper.map(dto, GuaranteeDto, ECGuarantee);
@@ -230,7 +245,11 @@ export class GuaranteeService {
         .build(),
     );
     if (!item) {
-      throw new NotFoundException('the item with this given id not founded!');
+      throw new NotFoundException(
+        this.i18n.t('core.not_found_id', {
+          lang: I18nContext.current().lang,
+        }),
+      );
     }
     item.isDeleted = true;
     await item.save();
@@ -262,7 +281,11 @@ export class GuaranteeService {
         .build(),
     );
     if (!item) {
-      throw new NotFoundException('the item with this given slug not founded!');
+      throw new NotFoundException(
+        this.i18n.t('core.not_found_slug', {
+          lang: I18nContext.current().lang,
+        }),
+      );
     }
     return {
       result: _.pick(item, [
@@ -293,7 +316,9 @@ export class GuaranteeService {
         .build(),
     );
     if (!item) {
-      throw new NotFoundException('the item with this given id not founded!');
+      throw new NotFoundException(
+        this.i18n.t('core.not_found_id', { lang: I18nContext.current().lang }),
+      );
     }
 
     // upload to s3 cloud
@@ -373,7 +398,11 @@ export class GuaranteeService {
         .build(),
     );
     if (!attachment) {
-      throw new ForbiddenException("You don't have access to this file!");
+      throw new ForbiddenException(
+        this.i18n.t('core.dont_access_to_this_file', {
+          lang: I18nContext.current().lang,
+        }),
+      );
     }
     const accessUrl = await this.minioClientService.generateDownloadUrl(
       attachment.bucketName,

apps/main/src/generated/i18n.generated.ts

@@ -0,0 +1,20 @@
+/* DO NOT EDIT, file generated by nestjs-i18n */
+
+/* eslint-disable */
+/* prettier-ignore */
+import { Path } from "nestjs-i18n";
+/* prettier-ignore */
+export type I18nTranslations = {
+    "core": {
+        "not_found_id": string;
+        "not_found_slug": string;
+        "the_given_slug_is_exists_before": string;
+        "dont_access_to_this_file": string;
+        "validation": {
+            "is_not_empty": string;
+        };
+        "success": string;
+    };
+};
+/* prettier-ignore */
+export type I18nPath = Path<I18nTranslations>;

apps/main/src/i18nResolver/AppLanguageResolver.ts

@@ -0,0 +1,13 @@
+import { ExecutionContext, Inject, Injectable, Scope } from '@nestjs/common';
+import { I18nResolver } from 'nestjs-i18n';
+
+@Injectable()
+export class AppLanguageResolver implements I18nResolver {
+  constructor() {}
+
+  resolve(
+    context: ExecutionContext,
+  ): Promise<string | string[] | undefined> | string | string[] | undefined {
+    return 'fa';
+  }
+}

apps/main/src/routes/app.module.ts

@@ -27,6 +27,9 @@ import * as session from 'express-session';
 import { DynamicProviderModule } from '../dynamic-provider/dynamic-provider.module';
 import { ThrottlerBehindProxyGuard } from '@rahino/commontools/guard';
 import { APP_GUARD } from '@nestjs/core';
+import { AcceptLanguageResolver, I18nModule, QueryResolver } from 'nestjs-i18n';
+import * as path from 'path';
+import { AppLanguageResolver } from '../i18nResolver/AppLanguageResolver';
 
 @Module({
   imports: [
@@ -66,7 +69,25 @@ import { APP_GUARD } from '@nestjs/core';
     CoreModule,
     UIModule,
     DynamicProviderModule.register(),
-
+    I18nModule.forRoot({
+      fallbackLanguage: 'en',
+      loaderOptions: {
+        path: [path.join(__dirname, '../../../i18n/')],
+        watch: true,
+      },
+      resolvers: [
+        AppLanguageResolver,
+        {
+          use: QueryResolver,
+          options: ['lang'],
+        },
+        AcceptLanguageResolver,
+      ],
+      typesOutputPath: path.join(
+        __dirname,
+        '../../../apps/main/src/generated/i18n.generated.ts',
+      ),
+    }),
     DevtoolsModule.register({
       http: process.env.NODE_ENV !== 'production',
     }),

i18n/en/core.json

@@ -0,0 +1,10 @@
+{
+  "not_found_id": "the item with this given id not founded !",
+  "not_found_slug": "the item with this given slug not founded !",
+  "the_given_slug_is_exists_before": "the item with this given slug is exists before",
+  "dont_access_to_this_file": "You don't have access to this file !",
+  "validation": {
+    "is_not_empty": "{property} couldn't be empty"
+  },
+  "success": "success"
+}

i18n/fa/core.json

@@ -0,0 +1,9 @@
+{
+  "not_found_id": "آیتم مورد نظر توسط شناسه ارسال شده یافت نشد",
+  "not_found_slug": "آیتم مورد نظر توسط جداکننده یا لینک مورد نظر یافت نشد",
+  "dont_access_to_this_file": "شما دسترسی به این فایل را ندارید",
+  "validation": {
+    "is_not_empty": "{property} نمیتواند خالی باشد"
+  },
+  "success": "با موفقیت انجام شد"
+}

nest-cli.json

@@ -6,7 +6,8 @@
     "deleteOutDir": true,
     "webpack": true,
     "tsConfigPath": "apps/main/tsconfig.app.json",
-    "plugins": ["@nestjs/swagger/plugin"]
+    "plugins": ["@nestjs/swagger/plugin"],
+    "assets": [{ "include": "i18n/**/*", "watchAssets": true }]
   },
   "monorepo": true,
   "root": "apps/main",