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/*
This file is part of TALER
(C) 2015 GNUnet e.V.
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.
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
TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
* Script that is injected into (all!) pages to allow them
* to interact with the GNU Taler wallet via DOM Events.
*
* @author Florian Dold
*/
/// <reference path="../lib/decl/chrome/chrome.d.ts" />
"use strict";
// Make sure we don't pollute the namespace too much.
namespace TalerNotify {
const PROTOCOL_VERSION = 1;
console.log("Taler injected", chrome.runtime.id);
// FIXME: only do this for test wallets?
// This is no security risk, since the extension ID for published
// extension is publicly known.
function subst(url: string, H_contract) {
url = url.replace("${H_contract}", H_contract);
url = url.replace("${$}", "$");
return url;
}
const handlers = [];
// Hack to know when the extension is unloaded
let port = chrome.runtime.connect();
port.onDisconnect.addListener(() => {
console.log("chrome runtime disconnected, removing handlers");
for (let handler of handlers) {
document.removeEventListener(handler.type, handler.listener);
}
});
registerHandlers();
function registerHandlers() {
const $ = (x) => document.getElementById(x);
function addHandler(type, listener) {
document.addEventListener(type, listener);
handlers.push({type, listener});
}
addHandler("taler-query-id", function(e) {
let evt = new CustomEvent("taler-id", {
detail: {
id: chrome.runtime.id
}
});
document.dispatchEvent(evt);
});
addHandler("taler-probe", function(e) {
let evt = new CustomEvent("taler-wallet-present", {
detail: {
walletProtocolVersion: PROTOCOL_VERSION
}
});
document.dispatchEvent(evt);
});
addHandler("taler-create-reserve", function(e: CustomEvent) {
console.log("taler-create-reserve with " + JSON.stringify(e.detail));
let params = {
amount: JSON.stringify(e.detail.amount),
callback_url: URI(e.detail.callback_url)
.absoluteTo(document.location.href),
bank_url: document.location.href,
};
let uri = URI(chrome.extension.getURL("pages/confirm-create-reserve.html"));
document.location.href = uri.query(params).href();
});
addHandler("taler-confirm-reserve", function(e: CustomEvent) {
console.log("taler-confirm-reserve with " + JSON.stringify(e.detail));
let msg = {
type: "confirm-reserve",
detail: {
reservePub: e.detail.reserve_pub
}
};
chrome.runtime.sendMessage(msg, (resp) => {
console.log("confirm reserve done");
});
});
addHandler("taler-confirm-contract", function(e: CustomEvent) {
if (!e.detail.contract_wrapper) {
console.error("contract wrapper missing");
return;
}
const offer = e.detail.contract_wrapper;
if (!offer.contract) {
console.error("contract field missing");
return;
}
const msg = {
type: "check-repurchase",
detail: {
contract: offer.contract
},
};
chrome.runtime.sendMessage(msg, (resp) => {
if (resp.error) {
console.error("wallet backend error", resp);
return;
}
if (resp.isRepurchase) {
console.log("doing repurchase");
console.assert(resp.existingFulfillmentUrl);
console.assert(resp.existingContractHash);
window.location.href = subst(resp.existingFulfillmentUrl,
resp.existingContractHash);
} else {
const uri = URI(chrome.extension.getURL("pages/confirm-contract.html"));
const params = {
offer: JSON.stringify(offer),
merchantPageUrl: document.location.href,
};
const target = uri.query(params).href();
if (e.detail.replace_navigation === true) {
document.location.replace(target);
} else {
document.location.href = target;
}
}
});
});
addHandler('taler-execute-payment', function(e: CustomEvent) {
console.log("got taler-execute-payment in content page");
if (!e.detail.pay_url) {
console.log("field 'pay_url' missing in taler-execute-payment event");
return;
}
const payUrl = e.detail.pay_url;
const msg = {
type: "execute-payment",
detail: {
H_contract: e.detail.H_contract,
},
};
chrome.runtime.sendMessage(msg, (resp) => {
console.log("got resp");
console.dir(resp);
if (!resp.success) {
console.log("got event detial:");
console.dir(e.detail);
if (e.detail.offering_url) {
console.log("offering url", e.detail.offering_url);
window.location.href = e.detail.offering_url;
} else {
console.error("execute-payment failed");
}
return;
}
let contract = resp.contract;
if (!contract) {
throw Error("contract missing");
}
console.log("Making request to ", payUrl);
let r = new XMLHttpRequest();
r.open('post', payUrl);
r.send(JSON.stringify(resp.payReq));
r.onload = () => {
switch (r.status) {
case 200:
console.log("going to", contract.fulfillment_url);
// TODO: Is this the right thing? Does the reload
// TODO: override setting location.href?
window.location.href = subst(contract.fulfillment_url,
e.detail.H_contract);
window.location.reload(true);
break;
default:
console.log("Unexpected status code for $pay_url:", r.status);
break;
}
};
});
});
}
}
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