class Control {
    constructor(stream, raw) {
        this.stream = stream;
        this.raw = typeof raw !== 'undefined' ? raw : true
        if (this.raw) {
            this.stream.setRawMode(true);
            this.stream.resume();
            this.stream.setEncoding('utf8');
        }
        this.stream.on('data', data => this.inputHandler(data));

    }

    inputHandler(data) {
        switch (data) {
            case '\u0003':
                // ctrl-c
                process.exit();
                break;
            default:
                this.stream.write(data);
                break;
        }
    }
}

const control = new Control(process.stdin, true);