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

backend/src/modules/cases/cases.service.ts

@@ -4,6 +4,7 @@ import {
   Injectable,
   NotFoundException,
 } from '@nestjs/common';
+import { createReadStream, existsSync } from 'fs';
 import { CatalogEntityKind, LabTaskStatus, Prisma } from '@prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { normalizeMobile } from '../../common/phone';
@@ -54,6 +55,20 @@ const labCaseListInclude = {
       },
     },
   },
+  toothProsthesis: true,
+  attachments: {
+    include: {
+      attachment: {
+        select: {
+          id: true,
+          fileName: true,
+          mimeType: true,
+          sizeBytes: true,
+          createdAt: true,
+        },
+      },
+    },
+  },
 } satisfies Prisma.LabCaseInclude;
 
 type LabCaseTaskWithRelations = Prisma.LabCaseTaskGetPayload<{
@@ -283,6 +298,43 @@ export class CasesService {
     return { success: true, data: await this.mapLabCaseDetail(labCase, localeInput) };
   }
 
+  async streamCaseAttachment(
+    labCaseId: string,
+    attachmentId: string,
+    labOrganizationId: string,
+    actorUserId: string,
+  ) {
+    await this.assertCanReadCases(actorUserId, labOrganizationId);
+
+    const link = await this.prisma.labCaseAttachment.findFirst({
+      where: {
+        labCaseId,
+        attachmentId,
+        labCase: {
+          sentAt: { not: null },
+          sends: { some: { organizationId: labOrganizationId } },
+        },
+      },
+      include: {
+        attachment: { select: { storagePath: true, fileName: true, mimeType: true } },
+      },
+    });
+
+    if (!link?.attachment) {
+      throw new NotFoundException('Attachment not found');
+    }
+
+    if (!existsSync(link.attachment.storagePath)) {
+      throw new NotFoundException('Attachment file is missing on disk');
+    }
+
+    return {
+      stream: createReadStream(link.attachment.storagePath),
+      fileName: link.attachment.fileName,
+      mimeType: link.attachment.mimeType,
+    };
+  }
+
   async updateTask(
     labCaseId: string,
     taskId: string,
@@ -457,6 +509,18 @@ export class CasesService {
         teeth: normalizeTeeth(link.detail.teeth),
         comment: link.detail.comment,
       })),
+      toothProsthesis: lc.toothProsthesis.map((row) => ({
+        treatmentDetailId: row.treatmentDetailId,
+        tooth: row.tooth,
+        prosthesisTypeCode: row.prosthesisTypeCode,
+      })),
+      attachments: lc.attachments.map((row) => ({
+        id: row.attachment.id,
+        fileName: row.attachment.fileName,
+        mimeType: row.attachment.mimeType,
+        sizeBytes: row.attachment.sizeBytes,
+        createdAt: row.attachment.createdAt.toISOString(),
+      })),
       sends: lc.sends.map((s) => ({
         organizationId: s.organizationId,
         organizationName: s.organization.name,