const tmp = require('tmp');

export function isNotInstalledError(error: Error): boolean {

const isError = typeof (error) === 'object' && error !== null;

const errorObj = <any>error;

if (!isError) {

return false;

}

const isModuleNoInstalledError = errorObj.code === 1 && error.message.indexOf('No module named') >= 0;

return errorObj.code === 'ENOENT' || errorObj.code === 127 || isModuleNoInstalledError;

}

export interface Deferred<T> {

resolve(value?: T | PromiseLike<T>);

reject(reason?: any);

readonly promise: Promise<T>;

readonly resolved: boolean;

readonly rejected: boolean;

readonly completed: boolean;

}

class DeferredImpl<T> implements Deferred<T> {

private _resolve: (value?: T | PromiseLike<T>) => void;

private _reject: (reason?: any) => void;

private _resolved: boolean = false;

private _rejected: boolean = false;

private _promise: Promise<T>;

constructor(private scope: any = null) {

this._promise = new Promise<T>((res, rej) => {

this._resolve = res;

this._reject = rej;

});

}

resolve(value?: T | PromiseLike<T>) {

this._resolve.apply(this.scope ? this.scope : this, arguments);

this._resolved = true;

}

reject(reason?: any) {

this._reject.apply(this.scope ? this.scope : this, arguments);

this._rejected = true;

}

get promise(): Promise<T> {

return this._promise;

}

get resolved(): boolean {

return this._resolved;

}

get rejected(): boolean {

return this._rejected;

}

get completed(): boolean {

return this._rejected || this._resolved;

}

}

export function createDeferred<T>(scope: any = null): Deferred<T> {

return new DeferredImpl<T>(scope);

}

export function createTemporaryFile(extension: string, temporaryDirectory?: string): Promise<{ filePath: string, cleanupCallback: Function }> {

let options: any = { postfix: extension };

if (temporaryDirectory) {

options.dir = temporaryDirectory;

}

return new Promise<{ filePath: string, cleanupCallback: Function }>((resolve, reject) => {

tmp.file(options, function _tempFileCreated(err, tmpFile, fd, cleanupCallback) {

if (err) {

return reject(err);

}

resolve({ filePath: tmpFile, cleanupCallback: cleanupCallback });

});

});

}