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/*
This file is part of TALER
(C) 2015-2016 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/>
*/
/// <reference path="../lib/decl/mithril.d.ts" />
import {amountToPretty, canonicalizeBaseUrl} from "../lib/wallet/helpers";
import {AmountJson, CreateReserveResponse} from "../lib/wallet/types";
import m from "mithril";
"use strict";
/**
* Execute something after a delay, with the possibility
* to reset the delay.
*/
class DelayTimer {
ms: number;
f;
timerId: number = null;
constructor(ms: number, f) {
this.f = f;
this.ms = ms;
}
bump() {
this.stop();
const handler = () => {
this.f();
};
this.timerId = window.setTimeout(handler, this.ms);
}
stop() {
if (this.timerId !== null) {
window.clearTimeout(this.timerId);
}
}
}
class Controller {
url = m.prop<string>();
statusString = null;
isValidMint = false;
private timer: DelayTimer;
private request: XMLHttpRequest;
amount: AmountJson;
callbackUrl: string;
constructor(initialMintUrl: string, amount: AmountJson, callbackUrl: string) {
this.amount = amount;
this.callbackUrl = callbackUrl;
this.timer = new DelayTimer(800, () => this.update());
this.url(initialMintUrl);
this.update();
}
private update() {
this.timer.stop();
const doUpdate = () => {
if (!this.url()) {
this.statusString = i18n`Please enter a URL`;
m.endComputation();
return;
}
this.statusString = null;
let parsedUrl = URI(this.url());
if (parsedUrl.is("relative")) {
this.statusString = i18n`The URL you've entered is not valid (must be absolute)`;
m.endComputation();
return;
}
const keysUrl = URI("/keys").absoluteTo(canonicalizeBaseUrl(this.url()));
console.log(`requesting keys from '${keysUrl}'`);
this.request = new XMLHttpRequest();
this.request.onreadystatechange = () => {
if (this.request.readyState == XMLHttpRequest.DONE) {
switch (this.request.status) {
case 200:
this.isValidMint = true;
this.statusString = "The mint base URL is valid!";
break;
case 0:
this.statusString = `unknown request error`;
break;
default:
this.statusString = `request failed with status ${this.request.status}`;
break;
}
}
m.endComputation();
};
this.request.open("get", keysUrl.href());
this.request.send();
};
m.startComputation();
doUpdate();
console.log("got update");
}
reset() {
this.isValidMint = false;
this.statusString = null;
if (this.request) {
this.request.abort();
this.request = null;
}
}
confirmReserve(mint: string, amount: AmountJson, callback_url: string) {
const d = {mint, amount};
const cb = (rawResp) => {
if (!rawResp) {
throw Error("empty response");
}
if (!rawResp.error) {
const resp = CreateReserveResponse.checked(rawResp);
let q = {
mint: resp.mint,
reserve_pub: resp.reservePub,
amount_value: amount.value,
amount_fraction: amount.fraction,
amount_currency: amount.currency,
};
let url = URI(callback_url).addQuery(q);
if (!url.is("absolute")) {
throw Error("callback url is not absolute");
}
console.log("going to", url.href());
document.location.href = url.href();
} else {
this.reset();
this.statusString = (
`Oops, something went wrong.` +
`The wallet responded with error status (${rawResp.error}).`);
}
};
chrome.runtime.sendMessage({type: 'create-reserve', detail: d}, cb);
}
onUrlChanged(url: string) {
this.reset();
this.url(url);
this.timer.bump();
}
}
function view(ctrl: Controller) {
let controls = [];
let mx = (x: string, ...args) => controls.push(m(x, ...args));
mx("p",
i18n`The bank wants to create a reserve over ${amountToPretty(
ctrl.amount)}.`);
mx("input",
{
className: "url",
type: "text",
spellcheck: false,
value: ctrl.url(),
oninput: m.withAttr("value", ctrl.onUrlChanged.bind(ctrl)),
});
mx("button", {
onclick: () => ctrl.confirmReserve(ctrl.url(),
ctrl.amount,
ctrl.callbackUrl),
disabled: !ctrl.isValidMint
},
"Confirm mint selection");
if (ctrl.statusString) {
mx("p", ctrl.statusString);
} else {
mx("p", "Checking URL, please wait ...");
}
return m("div", controls);
}
function getSuggestedMint(currency: string): Promise<string> {
// TODO: make this request go to the wallet backend
// Right now, this is a stub.
const defaultMint = {
"KUDOS": "http://mint.test.taler.net"
};
let mint = defaultMint[currency];
if (!mint) {
mint = ""
}
return Promise.resolve(mint);
}
export function main() {
const url = URI(document.location.href);
const query: any = URI.parseQuery(url.query());
const amount = AmountJson.checked(JSON.parse(query.amount));
const callback_url = query.callback_url;
const bank_url = query.bank_url;
getSuggestedMint(amount.currency)
.then((suggestedMintUrl) => {
const controller = () => new Controller(suggestedMintUrl, amount, callback_url);
var MintSelection = {controller, view};
m.mount(document.getElementById("mint-selection"), MintSelection);
})
.catch((e) => {
// TODO: provide more context information, maybe factor it out into a
// TODO:generic error reporting function or component.
document.body.innerText = `Fatal error: "${e.message}".`;
console.error(`got backend error "${e.message}"`);
});
}
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