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<!DOCTYPE html>
<!--
This file is aprt of GNU TALER
Copyright (C) 2014,2015, 2016 INRIA
TALER is free software: you can
redistribute it and/or modify it under the terms of the GNU
Lesser General Public License (GNU LGPL) as published by the
Free Software
Foundation, either version 3 of the License, or (at your option)
any later version. The code is distributed WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU LGPL for more details.
As additional permission under GNU LGPL version 3 section 7, you
may distribute non-source (e.g., minimized or compacted) forms of
that code without the copy of the GNU LGPL normally required by
section 4, provided you include this license notice and a URL
through which recipients can access the Corresponding Source.
-->
<html>
<head>
<title>Toy Store - Payment method - Taler Demo</title>
<link rel="stylesheet" type="text/css" href="web-common/style.css">
<script type="application/javascript" src="web-common/taler-presence.js"></script>
</head>
<body>
<?php
// get the donation information from form
$donation_receiver = $_POST['donation_receiver'];
$donation_amount = $_POST['donation_amount'];
$donation_currency = $_POST['donation_currency'];
// get frational part
list ($donation_value, $donation_fraction) = explode (".", $donation_amount, 2);
// create PHP session and store donation information in session
$donation_fraction = (float) ("0." . $donation_fraction);
session_start();
$_SESSION['receiver'] = $donation_receiver;
$_SESSION['amount_value'] = (int) $donation_amount;
$_SESSION['amount_fraction'] = (int) ($donation_fraction * 1000000);
$_SESSION['currency'] = $donation_currency;
?>
<header>
<div id="logo">
<svg height="100" width="100">
<circle cx="50" cy="50" r="40" stroke="darkcyan" stroke-width="6" fill="white" />
<text x="19" y="82" font-family="Verdana" font-size="90" fill="darkcyan">S</text>
</svg>
</div>
<!--#include virtual="web-common/dropdown-navbar.html" -->
<h1 class="nav">Toy Store - Select payment method</h1>
</header>
<aside class="sidebar" id="left">
</aside>
<section id="main">
<article>
<h1>Select your payment method</h1>
<p>
This is an example for a "checkout" page of a Web shop.
On the previous page, you have created the shopping cart
and decided which product to buy (i.e. which project to
donate KUDOS to). Now in this page, you are asked to
select a payment option. As Taler is not yet universally
used, we expect merchants will offer various payment options.
</p>
<p>
The page also demonstrates how to only enable (or show) the Taler
option if Taler is actually supported by the browser. For example,
if you disable the Taler extension now, the Taler payment option
will be disabled in the page. Naturally, you could also trivially
hide the Taler option entirely by changing the visibility instead.
</p>
<p>
Note that you MUST select Taler here for the demo to continue,
as the other payment options are just placeholders and not
really working in the demonstration. Also, it is of course
possible to ask the user to make this choice already on the
previous page (with the shopping cart), we just separated the
two steps to keep each step as simple as possible.
</p>
<form name="tform" action="" method="POST">
<div id="opt-form" align="left"><br>
<input type="radio" name="payment_system" value="lisa"
id="lisa-radio-button-id">Lisa</input>
<br/>
<input type="radio" name="payment_system" value="ycard">You Card</input>
<br/>
<input type="radio" name="payment_system" value="cardme">Card Me</input>
<br/>
<input type="radio" name="payment_system" value="taler"
checked
id="taler-radio-button-id" class="taler-installed-enable">Taler</input>
<br/>
<input type="button" onclick="pay(this.form)" value="Ok"></input>
</div>
</form>
</article>
</section>
<script type="text/javascript">
/* This function is called from "taler_pay" after
we downloaded the JSON contract from the merchant.
We now need to pass it to the extension. */
function handle_contract(contract_wrapper) {
var cEvent = new CustomEvent('taler-confirm-contract', {
detail: {
contract_wrapper: contract_wrapper
}
});
document.dispatchEvent(cEvent);
};
/* Trigger Taler contract generation on the server, and pass the
contract to the extension once we got it. */
function taler_pay(form) {
var contract_request = new XMLHttpRequest();
/* Note that the URL we give here is specific to the Demo-shop
and not dictated by the protocol: each web shop can
have its own way of generating and transmitting the
contract, there just must be a way to get the contract
and to pass it to the wallet when the user selects 'Pay'. */
contract_request.open("GET", "generate_taler_contract.php", true);
contract_request.onload = function (e) {
if (contract_request.readyState == 4) {
if (contract_request.status == 200) {
/* display contract_requestificate (i.e. it sends the JSON string
to the extension) alert (contract_request.responseText); */
console.log("response text:", contract_request.responseText);
var contract_wrapper = JSON.parse(contract_request.responseText);
if (!contract_wrapper) {
console.error("response text is invalid JSON");
return;
}
handle_contract(contract_wrapper);
} else {
/* There was an error obtaining the contract from the merchant,
obviously this should not happen. To keep it simple, we just
alert the user to the error. */
alert("Failure to download contract from merchant " +
"(" + contract_request.status + "):\n" +
contract_request.responseText);
}
}
};
contract_request.onerror = function (e) {
/* There was an error obtaining the contract from the merchant,
obviously this should not happen. To keep it simple, we just
alert the user to the error. */
alert("Failure requesting the contract:\n" + contract_request.statusText);
};
contract_request.send();
}
/* This function is called when the user presses the
'Ok' button. We are now supposed to trigger the
"correct" payment system logic. For this demo, we
only handle "taler". */
function pay(form) {
var choice = form.elements["payment_system"].value;
if (choice == "taler") {
taler_pay(form);
}
else {
alert("You selected '" + choice + "', but we do not support this payment system in the demo.");
}
};
</script>
</body>
</html>
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