fastify-multipart for Nest.js

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  <h1> fastify-multipart for Nest.js</h1>

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This library adds decorators for [Nest.js](https://github.com/nestjs/nest) to support [fastify-multipart](https://github.com/fastify/fastify-multipart). The API is very similar to the official Nest.js Express file decorators.

## Installation

NPM

```bash
$ npm install @blazity/nest-file-fastify fastify-multipart
```

Yarn

```bash
$ yarn add @blazity/nest-file-fastify fastify-multipart
```

## Docs

### Single file

```ts
import { FileInterceptor, UploadedFile, StorageFile } from '@blazity/nest-file-fastify';

@Post('upload')
@UseInterceptors(FileInterceptor('file'))
uploadFile(@UploadedFile() file: StorageFile) {
  console.log(file);
}
```

`FileInterceptor` arguments:

- `fieldname`: string - name of the field that holds a file

- `options`: optional object of type [`UploadOptions`](https://github.com/Blazity/nest-file-fastify/blob/master/src/options.ts#L3)

### Array of files

```ts
import { FilesInterceptor, UploadedFiles, StorageFile } from '@blazity/nest-file-fastify';

@Post('upload')
@UseInterceptors(FilesInterceptor('files'))
uploadFile(@UploadedFiles() files: StorageFile[]) {
  console.log(files);
}
```

`FilesInterceptor` arguments:

- `fieldname`: string - name of the field that holds files

- `maxCount`: optional number - maximum number of files to accept

- `options`: optional object of type [`UploadOptions`](https://github.com/Blazity/nest-file-fastify/blob/master/src/options.ts#L3)

### Multiple files

```ts
import { FileFieldsInterceptor, UploadedFiles, StorageFile } from '@blazity/nest-file-fastify';

@Post('upload')
@UseInterceptors(FileFieldsInterceptor([
  { name: 'avatar', maxCount: 1 },
  { name: 'background', maxCount: 1 },
]))
uploadFile(@UploadedFiles() files: { avatar?: StorageFile[], background?: StorageFile[] }) {
  console.log(files);
}
```

`FileFieldsInterceptor` arguments:

- `uploadFields`: object of type [`UploadField`](https://github.com/Blazity/nest-file-fastify/blob/master/src/interceptors/file-fields-interceptor.ts#L15)

- `options`: optional object of type [`UploadOptions`](https://github.com/Blazity/nest-file-fastify/blob/master/src/options.ts#L3)

### Any files

```ts
import { AnyFilesInterceptor, UploadedFiles, StorageFile } from '@blazity/nest-file-fastify';

@Post('upload')
@UseInterceptors(AnyFilesInterceptor()
uploadFile(@UploadedFiles() files: StorageFile[]) {
  console.log(files);
}
```

`AnyFilesInterceptor` arguments:

- `options`: optional object of type [`UploadOptions`](https://github.com/Blazity/nest-file-fastify/blob/master/src/options.ts#L3)