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/*
This file is part of GNU Taler
(C) 2021 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { Fragment, h, render, VNode } from "preact";
import { render as renderToString } from "preact-render-to-string";
import { useEffect } from "preact/hooks";
import { Footer } from "../components/Footer";
import "../css/pure-min.css";
import "../css/style.css";
import { QR } from "../components/QR";
import { Page, QRPlaceholder, WalletLink } from "../styled";
/**
* This page creates a payment request QR code
*
* It will build into a mustache html template for server side rendering
*
* server side rendering params:
* - order_status_url
* - taler_pay_qrcode_svg
* - taler_pay_uri
* - order_summary
*
* request params:
* - pay_uri
* - order_summary
* - order_status_url
*/
interface Props {
payURI?: string;
order_status_url?: string;
qr_code?: string;
}
function Head({ order_summary }: { order_summary?: string }): VNode {
return (
<Fragment>
<meta charSet="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<noscript>
<meta http-equiv="refresh" content="1" />
</noscript>
<title>
Payment requested for{" "}
{order_summary ? order_summary : `{{ order_summary }}`}
</title>
</Fragment>
);
}
export function RequestPayment({
payURI,
qr_code,
order_status_url,
}: Props): VNode {
useEffect(() => {
const longpollDelayMs = 60 * 1000;
let checkUrl: URL;
try {
checkUrl = new URL(
order_status_url ? order_status_url : "{{& order_status_url }}"
);
} catch (e) {
return;
}
checkUrl.searchParams.set("timeout_s", longpollDelayMs.toString());
const delayMs = 500;
function check() {
let retried = false;
function retryOnce() {
if (!retried) {
retried = true;
check();
}
}
const req = new XMLHttpRequest();
req.onreadystatechange = function () {
if (req.readyState === XMLHttpRequest.DONE) {
if (req.status === 200) {
try {
const resp = JSON.parse(req.responseText);
if (resp.fulfillment_url) {
window.location.replace(resp.fulfillment_url);
}
} catch (e) {
console.error("could not parse response:", e);
}
}
if (req.status === 202) {
try {
const resp = JSON.parse(req.responseText);
if (resp.fulfillment_url) {
window.location.replace(resp.fulfillment_url);
}
} catch (e) {
console.error("could not parse response:", e);
}
}
if (req.status === 402) {
try {
const resp = JSON.parse(req.responseText);
if (resp.already_paid_order_id && resp.fulfillment_url) {
window.location.replace(resp.fulfillment_url);
}
} catch (e) {
console.error("could not parse response:", e);
}
}
setTimeout(retryOnce, delayMs);
}
};
req.onerror = function () {
setTimeout(retryOnce, delayMs);
};
req.ontimeout = function () {
setTimeout(retryOnce, delayMs);
};
req.timeout = longpollDelayMs;
req.open("GET", checkUrl.href);
req.send();
}
setTimeout(check, delayMs);
});
return (
<Page>
<section>
<h1>Pay with Taler</h1>
<p>Scan this QR code with your mobile wallet:</p>
<QRPlaceholder
dangerouslySetInnerHTML={{
__html: qr_code ? qr_code : `{{{ taler_pay_qrcode_svg }}}`,
}}
/>
<p>
<WalletLink href={payURI ? payURI : `{{ taler_pay_uri }}`}>
Or open your Taler wallet
</WalletLink>
</p>
<p>
<a href="https://wallet.taler.net/">
Don't have a Taler wallet yet? Install it!
</a>
</p>
</section>
<Footer />
</Page>
);
}
export function mount(): void {
try {
const fromLocation = new URL(window.location.href).searchParams;
const os = fromLocation.get("order_summary") || undefined;
if (os) {
render(<Head order_summary={os} />, document.head);
}
const uri = fromLocation.get("pay_uri") || undefined;
const osu = fromLocation.get("order_status_url") || undefined;
const qr_code = uri ? renderToString(<QR text={uri} />) : undefined;
render(
<RequestPayment payURI={uri} order_status_url={osu} qr_code={qr_code} />,
document.body
);
} catch (e) {
console.error("got error", e);
if (e instanceof Error) {
document.body.innerText = `Fatal error: "${e.message}". Please report this bug at https://bugs.gnunet.org/.`;
}
}
}
export function buildTimeRendering(): { head: string; body: string } {
return {
head: renderToString(<Head />),
body: renderToString(<RequestPayment />),
};
}
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