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script.js
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237 lines (150 loc) · 4.66 KB
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/*
Author: Mihovil Ilakovac (infomiho)
Used: javascript + underscore.js (for templating), Foundation 5 (design)
It's based on a simple idea, to minimize requests to the server and only send the final cart to the server for evaluation and payment.
*/
var cartId = "cart";
var localAdapter = {
saveCart: function (object) {
var stringified = JSON.stringify(object);
localStorage.setItem(cartId, stringified);
return true;
},
getCart: function () {
return JSON.parse(localStorage.getItem(cartId));
},
clearCart: function () {
localStorage.removeItem(cartId);
}
};
var ajaxAdapter = {
saveCart: function (object) {
var stringified = JSON.stringify(object);
// do an ajax request here
},
getCart: function () {
// do an ajax request -- recognize user by cookie / ip / session
return JSON.parse(data);
},
clearCart: function () {
//do an ajax request here
}
};
var storage = localAdapter;
var helpers = {
getHtml: function (id) {
return document.getElementById(id).innerHTML;
},
setHtml: function (id, html) {
document.getElementById(id).innerHTML = html;
return true;
},
itemData: function (object) {
var count = object.querySelector(".count"),
patt = new RegExp("^[1-9]([0-9]+)?$");
count.value = (patt.test(count.value) === true) ? parseInt(count.value) : 1;
var item = {
name: object.getAttribute('data-name'),
price: object.getAttribute('data-price'),
id: object.getAttribute('data-id'),
count: count.value,
total: parseInt(object.getAttribute('data-price')) * parseInt(count.value)
};
return item;
},
updateView: function () {
var items = cart.getItems(),
template = this.getHtml('cartT'),
compiled = _.template(template, {
items: items
});
this.setHtml('cartItems', compiled);
this.updateTotal();
},
emptyView: function () {
this.setHtml('cartItems', '<p>Nothing to see here</p>');
this.updateTotal();
},
updateTotal: function () {
this.setHtml('totalPrice', cart.total + '$');
}
};
var cart = {
count: 0,
total: 0,
items: [],
getItems: function () {
return this.items;
},
setItems: function (items) {
this.items = items;
for (var i = 0; i < this.items.length; i++) {
var _item = this.items[i];
this.total += _item.total;
}
},
clearItems: function () {
this.items = [];
this.total = 0;
storage.clearCart();
helpers.emptyView();
},
addItem: function (item) {
if (this.containsItem(item.id) === false) {
this.items.push({
id: item.id,
name: item.name,
price: item.price,
count: item.count,
total: item.price * item.count
});
storage.saveCart(this.items);
} else {
this.updateItem(item);
}
this.total += item.price * item.count;
this.count += item.count;
helpers.updateView();
},
containsItem: function (id) {
if (this.items === undefined) {
return false;
}
for (var i = 0; i < this.items.length; i++) {
var _item = this.items[i];
if (id == _item.id) {
return true;
}
}
return false;
},
updateItem: function (object) {
for (var i = 0; i < this.items.length; i++) {
var _item = this.items[i];
if (object.id === _item.id) {
_item.count = parseInt(object.count) + parseInt(_item.count);
_item.total = parseInt(object.total) + parseInt(_item.total);
this.items[i] = _item;
storage.saveCart(this.items);
}
}
}
};
document.addEventListener('DOMContentLoaded', function () {
if (storage.getCart()) {
cart.setItems(storage.getCart());
helpers.updateView();
} else {
helpers.emptyView();
}
var products = document.querySelectorAll('.product button');
[].forEach.call(products, function (product) {
product.addEventListener('click', function (e) {
var item = helpers.itemData(this.parentNode);
cart.addItem(item);
});
});
document.querySelector('#clear').addEventListener('click', function (e) {
cart.clearItems();
});
});