leanwebclub/structure-and-scale/treasure-chest-js-class/script.js

83 lines
1.6 KiB
JavaScript

class TreasureChest {
constructor (initialLoot = {}) {
// Merge options into defaults
let {bronze, silver, gold} = Object.assign({
bronze: 0,
silver: 0,
gold: 0,
}, initialLoot);
Object.defineProperties(this, {
gold: {value: gold, writable: true},
silver: {value: silver, writable: true},
bronze: {value: bronze, writable: true}
});
}
addGold (qty) {
this.gold += qty;
return this;
}
addSilver (qty) {
this.silver += qty;
return this;
}
addBronze (qty) {
this.bronze += qty;
return this;
}
getLoot () {
return `Gold: ${this.gold}, Silver: ${this.silver}, Bronze: ${this.bronze}`;
}
/**
* Randomly shuffle an array
* https://stackoverflow.com/a/2450976/1293256
* @param {Array} array The array to shuffle
* @return {Array} The shuffled array
*/
static shuffle (array) {
let currentIndex = array.length;
let temporaryValue, randomIndex;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = array[currentIndex];
array[currentIndex] = array[randomIndex];
array[randomIndex] = temporaryValue;
}
return array;
}
static getRandomLoot () {
let amount = [];
for (let qty = 0; qty < 50; qty++) {
amount.push(qty+1);
}
return {
gold: this.shuffle(amount)[0],
silver: this.shuffle(amount)[0],
bronze: this.shuffle(amount)[0],
}
}
};