feat(nestjs): migrate to NestJS

packages/server/src/common/constants/files.constants.ts

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+export const MULTER_MODULE_OPTIONS = 'MULTER_MODULE_OPTIONS';

packages/server/src/common/constants/multer.constants.ts

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+import type { Multer } from 'multer';
+import * as multerS3 from 'multer-s3';
+
+export const multerExceptions = {
+  // from https://github.com/expressjs/multer/blob/master/lib/multer-error.js
+  LIMIT_PART_COUNT: 'Too many parts',
+  LIMIT_FILE_SIZE: 'File too large',
+  LIMIT_FILE_COUNT: 'Too many files',
+  LIMIT_FIELD_KEY: 'Field name too long',
+  LIMIT_FIELD_VALUE: 'Field value too long',
+  LIMIT_FIELD_COUNT: 'Too many fields',
+  LIMIT_UNEXPECTED_FILE: 'Unexpected field',
+  MISSING_FIELD_NAME: 'Field name missing',
+};
+
+export const busboyExceptions = {
+  // from https://github.com/mscdex/busboy/blob/master/lib/types/multipart.js
+  MULTIPART_BOUNDARY_NOT_FOUND: 'Multipart: Boundary not found',
+  MULTIPART_MALFORMED_PART_HEADER: 'Malformed part header',
+  MULTIPART_UNEXPECTED_END_OF_FORM: 'Unexpected end of form',
+  MULTIPART_UNEXPECTED_END_OF_FILE: 'Unexpected end of file',
+};
+
+

packages/server/src/common/constants/multer.utils.ts

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+import {
+  BadRequestException,
+  HttpException,
+  PayloadTooLargeException,
+} from '@nestjs/common';
+import { multerExceptions, busboyExceptions } from './multer.constants';
+
+// Multer may add in a 'field' property to the error
+// https://github.com/expressjs/multer/blob/aa42bea6ac7d0cb8fcb279b15a7278cda805dc63/lib/multer-error.js#L19
+export function transformException(
+  error: (Error & { field?: string }) | undefined,
+) {
+  if (!error || error instanceof HttpException) {
+    return error;
+  }
+  switch (error.message) {
+    case multerExceptions.LIMIT_FILE_SIZE:
+      return new PayloadTooLargeException(error.message);
+    case multerExceptions.LIMIT_FILE_COUNT:
+    case multerExceptions.LIMIT_FIELD_KEY:
+    case multerExceptions.LIMIT_FIELD_VALUE:
+    case multerExceptions.LIMIT_FIELD_COUNT:
+    case multerExceptions.LIMIT_UNEXPECTED_FILE:
+    case multerExceptions.LIMIT_PART_COUNT:
+    case multerExceptions.MISSING_FIELD_NAME:
+      if (error.field) {
+        return new BadRequestException(`${error.message} - ${error.field}`);
+      }
+      return new BadRequestException(error.message);
+    case busboyExceptions.MULTIPART_BOUNDARY_NOT_FOUND:
+      return new BadRequestException(error.message);
+    case busboyExceptions.MULTIPART_MALFORMED_PART_HEADER:
+    case busboyExceptions.MULTIPART_UNEXPECTED_END_OF_FORM:
+    case busboyExceptions.MULTIPART_UNEXPECTED_END_OF_FILE:
+      return new BadRequestException(`Multipart: ${error.message}`);
+  }
+  return error;
+}