[MapleStory] Calculate the average ATTACK added in a weapon by scrolls

calcWeaponScroll.ts

/**
 * Calcuate the used scrolls of a weapon.
 *
 * @param baseAttack        The base attack
 * @param totalAttack       The total attack
 * @param sparkAttack       The ATTACK added by spark
 * @param appliedScrolls    The quantity of scrolls applied.
 * @param appliedStars      The quantity of stars applied.
 */
function calcWeaponScroll(
    baseAttack: number,
    totalAttack: number,
    sparkAttack: number,
    appliedScrolls: number,
    appliedStars: number
): number {

    totalAttack -= sparkAttack;

    while (appliedStars-- > 0) {

        totalAttack -= Math.floor(totalAttack / 50);
    }

    return (totalAttack - baseAttack) / appliedScrolls;
}