// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

import * as tmp from 'tmp';

import { ITempFileSystem, TemporaryFile } from './types';

interface IRawTempFS {

// TODO (https://github.com/microsoft/vscode/issues/84517)

// This functionality has been requested for the

// VS Code FS API (vscode.workspace.fs.*).

file(

config: tmp.Options,

callback?: (err: any, path: string, fd: number, cleanupCallback: () => void) => void,

): void;

}

// Operations related to temporary files and directories.

export class TemporaryFileSystem implements ITempFileSystem {

constructor(

// (effectively) the third-party "tmp" module to use

private readonly raw: IRawTempFS,

) {}

public static withDefaults(): TemporaryFileSystem {

return new TemporaryFileSystem(

// Use the actual "tmp" module.

tmp,

);

}

// Create a new temp file with the given filename suffix.

public createFile(suffix: string, mode?: number): Promise<TemporaryFile> {

const opts = {

postfix: suffix,

mode,

};

return new Promise<TemporaryFile>((resolve, reject) => {

this.raw.file(opts, (err, filename, _fd, cleanUp) => {

if (err) {

return reject(err);

}

resolve({

filePath: filename,

dispose: cleanUp,

});

});

});

}

}