feat(nestjs): migrate to NestJS

packages/server/src/common/interceptors/file.interceptor.ts

@@ -0,0 +1,70 @@
+import {
+  CallHandler,
+  ExecutionContext,
+  Inject,
+  mixin,
+  NestInterceptor,
+  Optional,
+  Type,
+} from '@nestjs/common';
+import * as multer from 'multer';
+import { Observable } from 'rxjs';
+import { MULTER_MODULE_OPTIONS } from '../constants/files.constants';
+import { transformException } from '../constants/multer.utils';
+import { MulterModuleOptions } from '@nestjs/platform-express';
+import { MulterOptions } from '@nestjs/platform-express/multer/interfaces/multer-options.interface';
+
+type MulterInstance = any;
+/**
+ * @param {string} fieldName
+ * @param {Function|MulterOptions} localOptions - Function that receives controller instance or MulterOptions object
+ */
+export function FileInterceptor(
+  fieldName: string,
+  localOptions?: ((instance: any) => MulterOptions) | MulterOptions,
+): Type<NestInterceptor> {
+  class MixinInterceptor implements NestInterceptor {
+    protected multer: MulterInstance;
+
+    constructor(
+      @Optional()
+      @Inject(MULTER_MODULE_OPTIONS)
+      options: (() => MulterModuleOptions | MulterModuleOptions) = () => ({}),
+    ) {
+      const resolvedOptions = typeof localOptions === 'function' 
+        ? localOptions(this)
+        : localOptions;
+        
+      this.multer = (multer as any)({
+        ...(typeof options === 'function' ? options() : options),
+        ...resolvedOptions,
+      });
+    }
+
+    async intercept(
+      context: ExecutionContext,
+      next: CallHandler,
+    ): Promise<Observable<any>> {
+      const ctx = context.switchToHttp();
+
+      await new Promise<void>((resolve, reject) =>
+        this.multer.single(fieldName)(
+          ctx.getRequest(),
+          ctx.getResponse(),
+          (err: any) => {
+            if (err) {
+              const error = transformException(err);
+              return reject(error);
+            }
+            resolve();
+          },
+        ),
+      );
+      return next.handle();
+    }
+  }
+
+  const Interceptor = mixin(MixinInterceptor);
+
+  return Interceptor;
+}