feat(File): add incomplete file module

Author: aminsh

src/file/file.module.ts

@@ -0,0 +1,19 @@
+import { DynamicModule, Module } from '@nestjs/common';
+import { FileOptions } from './file.type';
+import { multerRegister } from './multer/multer.register';
+
+@Module({})
+export class FileModule {
+  register(options: FileOptions): DynamicModule {
+   const multerRegisterModule: Partial<DynamicModule> = options.multer
+     ? multerRegister(options.multer)
+     : {};
+
+    return {
+      module: FileModule,
+      imports: [
+        ...multerRegisterModule.imports
+      ]
+    }
+  }
+}

src/file/file.type.ts

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+import { MulterOptions } from './multer';
+
+export interface FileOptions {
+  multer?: MulterOptions;
+}

src/file/index.ts

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+export * from './multer';
+export * from './file.module';
+export * from './file.type';

src/file/multer/index.ts

@@ -0,0 +1 @@
+export * from './multer.type';

src/file/multer/multer.decorator.ts

@@ -0,0 +1 @@
+

src/file/multer/multer.register.ts

@@ -0,0 +1,13 @@
+import { MulterOptions } from './multer.type';
+import { DynamicModule } from '@nestjs/common';
+import { MulterModule } from '@nestjs/platform-express';
+
+export const multerRegister = (options: MulterOptions): Partial<DynamicModule> => {
+  return {
+    imports: [
+      MulterModule.register({
+        dest: options.destination
+      })
+    ]
+  }
+}

src/file/multer/multer.type.ts

@@ -0,0 +1,4 @@
+export interface MulterOptions {
+  destination: string;
+  onUploading?: <TRequest>(request: TRequest, mimeType: string) => Promise<void>;
+}