hckrnews / arrays

class Sorter {

    constructor(key, direction) {

        this.key = key;

        this.moveDirection = direction === 'desc' ? -1 : 1;

    }

    order(original) {

        return original.sort(this.compare.bind(this));

    }

    compare(firstElement, secondElement) {

        let nameA = firstElement[this.key];

        let nameB = secondElement[this.key];

        if (typeof nameA === 'string') {

            nameA = nameA.toUpperCase();

        }

        if (typeof nameB === 'string') {

            nameB = nameB.toUpperCase();

        }

        if (nameA < nameB) {

            return -1 * this.moveDirection;

        }

        if (nameA > nameB) {

            return 1 * this.moveDirection;

        }

        return 0;

    }

    static create(original, key, direction) {

        const sorter = new Sorter(key, direction);

        return sorter.order(original);

    }

}