script.js

'use strict';

const personalMovieDB = {
    count: 0,
    movies: {},
    actors: {},
    genres: [],
    privat: false,

    start: function() {
        let numberOfFilms = 0;

        do {
            numberOfFilms = prompt('How many films have you watched?', '');
        } while (numberOfFilms == null || numberOfFilms == '' || isNaN(numberOfFilms));

        personalMovieDB.count = numberOfFilms;
    },

    rememberMyFilms: function() {
        for (let i = 0; i < 2; i++) { 
            let lastFilm = null;
            do { 
                lastFilm = prompt('What was the last movie you watched?', '');
            } while(lastFilm == null || lastFilm == '' || lastFilm.length > 50);

            let lastFilmRating = null;
            do {
                lastFilmRating = prompt('How do you rate this?', '');
            } while(lastFilmRating == null || lastFilmRating == '' || isNaN(lastFilmRating));

            personalMovieDB.movies[lastFilm] = lastFilmRating;
        }
    },

    detectPersonalLevel: function() {
        if (personalMovieDB.count > 0 && personalMovieDB.count <= 10) {
            alert("You've watched quite a few films!");
        } else if (personalMovieDB.count > 10 && personalMovieDB.count <= 30) {
            alert('You are a classical spectator!');
        } else if (personalMovieDB.count > 30) {
            alert('You are a movie fan!');
        } else {
            alert('Error!');
        }
    },

    writeYourGenres: function() {
        for (let i = 0; i < 3; i++) {
            let genre = null;
            do {
                genre = prompt(`What's your favorite genre at number ${i+1}?`, '');
            } while (genre == null || genre == '');

            personalMovieDB.genres[i] = genre;
        }

        personalMovieDB.genres.forEach((item, i) => console.log(`Your favorite genre #${i+1} is ${item}`))
    },

    toggleVisibleMyDB: function() {
        personalMovieDB.privat = !personalMovieDB.privat;
    },

    showMyDB: function() {
        if (!personalMovieDB.privat) {
            console.log(personalMovieDB);
        }
    }
}

personalMovieDB.start();
personalMovieDB.rememberMyFilms();
personalMovieDB.detectPersonalLevel();
personalMovieDB.writeYourGenres();
//personalMovieDB.toggleVisibleMyDB();
personalMovieDB.showMyDB();