assemblyLine

function createAssemblyLine() {
    const decorators = {
        hasClima,
        hasAudio,
        hasParktronic,
    };

    function hasClima(obj) {
        obj.temp = 21;
        obj.tempSettings = 21;
        obj.adjustTemp = function () {
            if (obj.temp > obj.tempSettings) {
                obj.temp -= 1;
            } else if (obj.temp < obj.tempSettings) {
                obj.temp += 1;
            }
        };
    }

    function hasAudio(obj) {
        obj.currentTrack = null;
        obj.nowPlaying = function () {
            if (obj.currentTrack !== null) {
                console.log(
                    `Now playing '${obj.currentTrack.name}' by ${obj.currentTrack.artist}`
                );
            }
        };
    }
    function hasParktronic(obj) {
        obj.checkDistance = function (distance) {
            let message = "";
            if (distance < 0.1) {
                message = "Beep! Beep! Beep!";
            } else if (distance < 0.25) {
                message = "Beep! Beep!";
            } else if (distance < 0.5) {
                message = "Beep!";
            }
            console.log(message);
        };
    }

    return decorators;
}

const assemblyLine = createAssemblyLine();

const myCar = {
    make: "Toyota",
    model: "Avensis",
};

assemblyLine.hasClima(myCar);
console.log(myCar.temp);
myCar.tempSettings = 18;
myCar.adjustTemp();
console.log(myCar.temp);

assemblyLine.hasAudio(myCar);
myCar.currentTrack = {
    name: "Never Gonna Give You Up",
    artist: "Rick Astley",
};
myCar.nowPlaying();

assemblyLine.hasParktronic(myCar);
myCar.checkDistance(0.4);
myCar.checkDistance(0.2);

console.log(myCar);