feat(server): immich checksum header (#9229)

* feat: dedupe by checksum header

* chore: open api

server/src/middleware/asset-upload.interceptor.ts

@@ -0,0 +1,25 @@
+import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
+import { Response } from 'express';
+import { AssetFileUploadResponseDto } from 'src/dtos/asset-v1-response.dto';
+import { ImmichHeader } from 'src/dtos/auth.dto';
+import { AuthenticatedRequest } from 'src/middleware/auth.guard';
+import { AssetService } from 'src/services/asset.service';
+import { fromMaybeArray } from 'src/utils/request';
+
+@Injectable()
+export class AssetUploadInterceptor implements NestInterceptor {
+  constructor(private service: AssetService) {}
+
+  async intercept(context: ExecutionContext, next: CallHandler<any>) {
+    const req = context.switchToHttp().getRequest<AuthenticatedRequest>();
+    const res = context.switchToHttp().getResponse<Response<AssetFileUploadResponseDto>>();
+
+    const checksum = fromMaybeArray(req.headers[ImmichHeader.CHECKSUM]);
+    const response = await this.service.getUploadAssetIdByChecksum(req.user, checksum);
+    if (response) {
+      res.status(200).send(response);
+    }
+
+    return next.handle();
+  }
+}