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export class OrderPage extends HTMLElement {
// the hash defines a private property in js
#user = {
name: "",
phone: "",
email: "",
};
constructor() {
super();
this.root = this.attachShadow({ mode: "open" });
const styles = document.createElement("style");
this.root.appendChild(styles);
const section = document.createElement("section");
this.root.appendChild(section);
async function loadCSS() {
const request = await fetch("/components/OrderPage.css");
styles.textContent = await request.text();
}
loadCSS();
}
connectedCallback() {
window.addEventListener("appcartchange", () => {
this.render();
});
this.render();
}
render() {
let section = this.root.querySelector("section");
if (app.store.cart.length == 0) {
section.innerHTML = `
<p class="empty">Your order is empty</p>
`;
} else {
let html = `
<h2>Your Order</h2>
<ul>
</ul>
`;
section.innerHTML = html;
const template = document.getElementById("order-form-template");
const content = template.content.cloneNode(true);
section.appendChild(content);
let total = 0;
for (let prodInCart of app.store.cart) {
const item = document.createElement("cart-item");
item.dataset.item = JSON.stringify(prodInCart);
this.root.querySelector("ul").appendChild(item);
total += prodInCart.quantity * prodInCart.product.price;
}
this.root.querySelector("ul").innerHTML += `
<li>
<p class='total'>Total</p>
<p class='price-total'>$${total.toFixed(2)}</p>
</li>
`;
}
// use the shadow dom to select the form otherwise it doesnt work
this.setFormBindings(this.root.querySelector("form"));
}
setFormBindings(form) {
// use the submit event so the enter key and the button works
form.addEventListener("submit", (event) => {
event.preventDefault();
alert(`Thanks for your order ${this.#user.name}.`);
this.#user.name = "";
this.#user.email = "";
this.#user.phone = "";
// TODO: Send the data to the Server
});
// set double data binding
this.#user = new Proxy(this.#user, {
set(target, property, value) {
target[property] = value;
form.elements[property].value = value;
// needed to indicate that the modification was successful
return true;
},
});
Array.from(form.elements).forEach((element) => {
// the change event does only get triggered when the user changes the
// element via the ui
element.addEventListener("change", (event) => {
this.#user[element.name] = element.value;
});
});
}
}
customElements.define("order-page", OrderPage);
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