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

// Licensed under the MIT License.

'use strict';

import * as vscode from 'vscode';

/*

See:

+ https://nodejs.org/api/errors.html

+ https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error

+ node_modules/@types/node/globals.d.ts

*/

interface IError {

name: string;

message: string;

toString(): string;

}

interface INodeJSError extends IError {

code: string;

stack?: string;

stackTraceLimit: number;

captureStackTrace(): void;

}

//================================

// "system" errors

namespace vscErrors {

const FILE_NOT_FOUND = vscode.FileSystemError.FileNotFound().name;

const FILE_EXISTS = vscode.FileSystemError.FileExists().name;

const IS_DIR = vscode.FileSystemError.FileIsADirectory().name;

const NOT_DIR = vscode.FileSystemError.FileNotADirectory().name;

const NO_PERM = vscode.FileSystemError.NoPermissions().name;

const known = [

// (order does not matter)

FILE_NOT_FOUND,

FILE_EXISTS,

IS_DIR,

NOT_DIR,

NO_PERM,

];

function errorMatches(err: Error, expectedName: string): boolean | undefined {

if (!known.includes(err.name)) {

return undefined;

}

return err.name === expectedName;

}

export function isFileNotFound(err: Error): boolean | undefined {

return errorMatches(err, FILE_NOT_FOUND);

}

export function isFileExists(err: Error): boolean | undefined {

return errorMatches(err, FILE_EXISTS);

}

export function isFileIsDir(err: Error): boolean | undefined {

return errorMatches(err, IS_DIR);

}

export function isNotDir(err: Error): boolean | undefined {

return errorMatches(err, NOT_DIR);

}

export function isNoPermissions(err: Error): boolean | undefined {

return errorMatches(err, NO_PERM);

}

}

interface ISystemError extends INodeJSError {

errno: number;

syscall: string;

info?: string;

path?: string;

address?: string;

dest?: string;

port?: string;

}

// Return a new error for errno ENOTEMPTY.

export function createDirNotEmptyError(dirname: string): ISystemError {

const err = new Error(`directory "${dirname}" not empty`) as ISystemError;

err.name = 'SystemError';

err.code = 'ENOTEMPTY';

err.path = dirname;

err.syscall = 'rmdir';

return err;

}

function isSystemError(err: Error, expectedCode: string): boolean | undefined {

const code = (err as ISystemError).code;

if (!code) {

return undefined;

}

return code === expectedCode;

}

// Return true if the given error is ENOENT.

export function isFileNotFoundError(err: Error): boolean | undefined {

const matched = vscErrors.isFileNotFound(err);

if (matched !== undefined) {

return matched;

}

return isSystemError(err, 'ENOENT');

}

// Return true if the given error is EEXIST.

export function isFileExistsError(err: Error): boolean | undefined {

const matched = vscErrors.isFileExists(err);

if (matched !== undefined) {

return matched;

}

return isSystemError(err, 'EEXIST');

}

// Return true if the given error is EISDIR.

export function isFileIsDirError(err: Error): boolean | undefined {

const matched = vscErrors.isFileIsDir(err);

if (matched !== undefined) {

return matched;

}

return isSystemError(err, 'EISDIR');

}

// Return true if the given error is ENOTDIR.

export function isNotDirError(err: Error): boolean | undefined {

const matched = vscErrors.isNotDir(err);

if (matched !== undefined) {

return matched;

}

return isSystemError(err, 'ENOTDIR');

}

// Return true if the given error is EACCES.

export function isNoPermissionsError(err: Error): boolean | undefined {

const matched = vscErrors.isNoPermissions(err);

if (matched !== undefined) {

return matched;

}

return isSystemError(err, 'EACCES');

}