improvement: attachment selection for lab dispatch added. attachment preview added to cases feature.

backend/src/modules/cases/cases.controller.ts

@@ -6,8 +6,10 @@ import {
   Patch,
   Query,
   Req,
+  Res,
   UseGuards,
 } from '@nestjs/common';
+import type { Response } from 'express';
 import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
 import { LabOrgGuard } from '../../common/guards/lab-org.guard';
 import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
@@ -42,6 +44,26 @@ export class CasesController {
     return this.casesService.getOne(id, organizationId, req.user.id, req.user.language);
   }
 
+  @Get(':id/attachments/:attachmentId/file')
+  @ApiOperation({ summary: 'Download an attachment shared with this lab case' })
+  async downloadAttachment(
+    @Param('id') id: string,
+    @Param('attachmentId') attachmentId: string,
+    @Req() req,
+    @Res() res: Response,
+  ) {
+    const organizationId = this.casesService.getOrganizationIdFromUser(req.user);
+    const file = await this.casesService.streamCaseAttachment(
+      id,
+      attachmentId,
+      organizationId,
+      req.user.id,
+    );
+    res.setHeader('Content-Type', file.mimeType);
+    res.setHeader('Content-Disposition', `inline; filename="${file.fileName}"`);
+    file.stream.pipe(res);
+  }
+
   @Patch(':id/tasks/:taskId')
   @ApiOperation({ summary: 'Toggle task important flag' })
   updateTask(