Movies.js

function solve(moviesArrInput) {
    let movies = [];

    const checkIfExist = (command, string) => {
        let index = string.indexOf(command) - 1;

        let movieName = '';
        for(let i = 0; i < index; i++) {
            movieName += string[i];
        }

        let movieExists = false;
        let existingMovieIndex;
        let data = '';

        for(let index in movies) {
            if(movies[index].name.includes(movieName)) {
                movieExists = true;
                existingMovieIndex = index;
                let commandIndex = string.indexOf(command) + command.length + 1;
                let stringArr = string.split('');
                stringArr.splice(0, commandIndex);
                data = stringArr.join('');
                break;
            } else {
                movieExists = false;
            }
        }

        if(movieExists) {
            return [true, existingMovieIndex, data];
        } else {
            return [false, -1];
        }
    };

    for(let command of moviesArrInput) {
        if(command.includes('addMovie')) {
            let commandArr = command.split('');
            commandArr.splice(0, 9);
            let movieName = commandArr.join('');

            let movie = {
                name: movieName
            };

            movies.push(movie);
        } else if(command.includes('directedBy')) {
            [exists, index, data] = checkIfExist('directedBy', command);
            if(exists) {
                movies[index].director = data;
            }
        } else if(command.includes('onDate')) {
            [exists, index, data] = checkIfExist('onDate', command);
            if(exists) {
                movies[index].date = data;
            }
        }
    }

    for(let movie of movies) {
        if(movie.name == undefined || movie.director == undefined || movie.date == undefined) {
            // dont do shit
        } else {
            console.log(JSON.stringify(movie));
        }
    }
}