Fixing the error when importing a large Excel file

apps/api/src/activities/activities.controller.ts

@@ -1,4 +1,5 @@
 import {
+  BadRequestException,
   Body,
   Controller,
   Delete,
@@ -28,6 +29,11 @@ import {
 } from './dto';
 import { brand } from '@mento/shared';
 
+const excelUpload = FileInterceptor('file', {
+  storage: memoryStorage(),
+  limits: { fileSize: 15_000_000 },
+});
+
 @Controller('activities')
 @UseGuards(JwtAuthGuard)
 export class ActivitiesController {
@@ -86,29 +92,32 @@ export class ActivitiesController {
   }
 
   @Post('import/preview')
-  @UseInterceptors(
-    FileInterceptor('file', {
-      storage: memoryStorage(),
-      limits: { fileSize: 15_000_000 },
-    }),
-  )
-  importPreview(@UploadedFile() file: Express.Multer.File) {
+  @UseInterceptors(excelUpload)
+  importPreview(@UploadedFile() file?: Express.Multer.File) {
+    if (!file?.buffer?.length) {
+      throw new BadRequestException('فایل ارسال نشده');
+    }
     return this.excelService.preview(file);
   }
 
   @Post('import')
-  @UseInterceptors(
-    FileInterceptor('file', {
-      storage: memoryStorage(),
-      limits: { fileSize: 15_000_000 },
-    }),
-  )
+  @UseInterceptors(excelUpload)
   import(
     @CurrentUser() user: Actor,
-    @UploadedFile() file: Express.Multer.File,
+    @UploadedFile() file?: Express.Multer.File,
     @Body('mapping') mapping?: string,
+    @Body('sessionId') sessionId?: string,
+    @Body('offset') offset?: string,
+    @Body('limit') limit?: string,
   ) {
-    return this.excelService.import(user, file, mapping);
+    if (!file?.buffer?.length && !sessionId) {
+      throw new BadRequestException('فایل ارسال نشده');
+    }
+    return this.excelService.import(user, file, mapping, {
+      sessionId,
+      offset,
+      limit,
+    });
   }
 
   @Get(':id')