ects-oleksandr-sokhan/index.js

Converter scores from the 100-point grading system to the ECTS

class ECTS {
    #gradeRanges = [
        { min: 90, max: 100, grade: 'A' },
        { min: 82, max: 89, grade: 'B' },
        { min: 74, max: 81, grade: 'C' },
        { min: 65, max: 73, grade: 'D' },
        { min: 60, max: 64, grade: 'E' },
        { min: 0, max: 59, grade: 'F' }
    ];

    constructor(score) {
        if (!ECTS.isValidScore(score)) {
            throw new Error('Score must be a number between 0 and 100');
        }
        this.score = score;
    }

    ectsFromScore() {
        const grade = this.#gradeRanges.find(range => 
            this.score >= range.min && this.score <= range.max
        );

        return grade ? grade.grade : 'Invalid score';
    }

    getGradeRanges() {
        return [...this.#gradeRanges];
    }

    static isValidScore(score) {
        return typeof score === 'number' && score >= 0 && score <= 100;
    }
}

module.exports = ECTS;