JS Applications Retake Exam - 12 December 2020 - Vacation

class Vacation {
    constructor(organizer, destination, budget) {
        this.organizer = organizer;
        this.destination = destination;
        this.budget = budget;
        this.kids = {};
    }

    registerChild(name, grade, budget) {
        if (budget < this.budget) {
            return `${name}'s money is not enough to go on vacation to ${this.destination}.`;
        }

        if (!this.kids.hasOwnProperty(grade)) {
            this.kids[grade] = [];
        }

        if (this.kids[grade].some((x) => {
            return (x.split('-')[0] === name);
        })) {
            return `${name} is already in the list for this ${this.destination} vacation.`;
        } else {
            this.kids[grade].push(`${name}-${budget}`);
            return this.kids[grade];
        }
    }

    removeChild(name, grade) {
        if (this.kids.hasOwnProperty(grade)) {
            const index = this.kids[grade].map((x) => x.split('-')[0]).indexOf(name);
            if (index >= 0) {
                this.kids[grade].splice(index, 1);
                return this.kids[grade];
            }
        }

        return `We couldn't find ${name} in ${grade} grade.`
    }

    toString() {
        if (this.numberOfChildren() === 0) {
            return `No children are enrolled for the trip and the organization of ${this.organizer} falls out...`;
        } else {
            let result = [`${this.organizer} will take ${this.numberOfChildren()} children on trip to ${this.destination}`];

            Object.entries(this.kids)
                .sort((a, b) => {
                    return Number(a[0] - Number(b[0]))
                })
                .forEach((x) => {
                    result.push(`Grade: ${x[0]}`);
                    x[1].reduce((acc, x, index) => {
                        acc.push(`${index + 1}. ${x}`);
                        return acc;
                    }, result);
                    result.push('');
                });

            return result.join(`\n`).trim();
        }
    }

    numberOfChildren() {
        let countOfChildren = 0;
        for (let grade in this.kids) {
            if (this.kids.hasOwnProperty(grade)) {
                countOfChildren += this.kids[grade].length;
            }
        }
        return countOfChildren;
    }
}

// let vacation = new Vacation('Mr Pesho', 'San diego', 2000);
// console.log(vacation.registerChild('Gosho', 5, 2000));
// console.log(vacation.registerChild('Lilly', 6, 2100));
// console.log(vacation.registerChild('Pesho', 6, 2400));
// console.log(vacation.registerChild('Gosho', 5, 2000));
// console.log(vacation.registerChild('Tanya', 5, 6000));
// console.log(vacation.registerChild('Mitko', 10, 1590));

// -------------------------------------------------------------

// let vacation = new Vacation('Mr Pesho', 'San diego', 2000);
// vacation.registerChild('Gosho', 5, 2000);
// vacation.registerChild('Lilly', 6, 2100);
// console.log(vacation.removeChild('Gosho', 9));
// vacation.registerChild('Pesho', 6, 2400);
// vacation.registerChild('Gosho', 5, 2000);
// console.log(vacation.removeChild('Lilly', 6));
// console.log(vacation.registerChild('Tanya', 5, 6000))

// -------------------------------------------------------------

// let vacation = new Vacation('Miss Elizabeth', 'Dubai', 2000);
// vacation.registerChild('Gosho', 5, 3000);
// vacation.registerChild('Lilly', 6, 1500);
// vacation.registerChild('Pesho', 7, 4000);
// vacation.registerChild('Tanya', 5, 5000);
// vacation.registerChild('Mitko', 10, 5500);
// console.log(vacation.toString());