wallet-core/content_scripts/notify.js

/*
 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.
var TalerNotify;
(function (TalerNotify) {
    var 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, H_contract) {
        url = url.replace("${H_contract}", H_contract);
        url = url.replace("${$}", "$");
        return url;
    }
    var handlers = [];
    // Hack to know when the extension is unloaded
    var port = chrome.runtime.connect();
    port.onDisconnect.addListener(function () {
        console.log("chrome runtime disconnected, removing handlers");
        for (var _i = 0, handlers_1 = handlers; _i < handlers_1.length; _i++) {
            var handler = handlers_1[_i];
            document.removeEventListener(handler.type, handler.listener);
        }
    });
    registerHandlers();
    function registerHandlers() {
        var $ = function (x) { return document.getElementById(x); };
        function addHandler(type, listener) {
            document.addEventListener(type, listener);
            handlers.push({ type: type, listener: listener });
        }
        addHandler("taler-query-id", function (e) {
            var evt = new CustomEvent("taler-id", {
                detail: {
                    id: chrome.runtime.id
                }
            });
            document.dispatchEvent(evt);
        });
        addHandler("taler-probe", function (e) {
            var evt = new CustomEvent("taler-wallet-present", {
                detail: {
                    walletProtocolVersion: PROTOCOL_VERSION
                }
            });
            document.dispatchEvent(evt);
        });
        addHandler("taler-create-reserve", function (e) {
            console.log("taler-create-reserve with " + JSON.stringify(e.detail));
            var params = {
                amount: JSON.stringify(e.detail.amount),
                callback_url: URI(e.detail.callback_url)
                    .absoluteTo(document.location.href),
                bank_url: document.location.href,
            };
            var uri = URI(chrome.extension.getURL("pages/confirm-create-reserve.html"));
            document.location.href = uri.query(params).href();
        });
        addHandler("taler-confirm-reserve", function (e) {
            console.log("taler-confirm-reserve with " + JSON.stringify(e.detail));
            var msg = {
                type: "confirm-reserve",
                detail: {
                    reservePub: e.detail.reserve_pub
                }
            };
            chrome.runtime.sendMessage(msg, function (resp) {
                console.log("confirm reserve done");
            });
        });
        addHandler("taler-confirm-contract", function (e) {
            if (!e.detail.contract_wrapper) {
                console.error("contract wrapper missing");
                return;
            }
            var offer = e.detail.contract_wrapper;
            if (!offer.contract) {
                console.error("contract field missing");
                return;
            }
            var msg = {
                type: "check-repurchase",
                detail: {
                    contract: offer.contract
                },
            };
            chrome.runtime.sendMessage(msg, function (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 {
                    var uri = URI(chrome.extension.getURL("pages/confirm-contract.html"));
                    var params = {
                        offer: JSON.stringify(offer),
                        merchantPageUrl: document.location.href,
                    };
                    var 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) {
            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;
            }
            var payUrl = e.detail.pay_url;
            var msg = {
                type: "execute-payment",
                detail: {
                    H_contract: e.detail.H_contract,
                },
            };
            chrome.runtime.sendMessage(msg, function (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;
                }
                var contract = resp.contract;
                if (!contract) {
                    throw Error("contract missing");
                }
                console.log("Making request to ", payUrl);
                var r = new XMLHttpRequest();
                r.open('post', payUrl);
                r.send(JSON.stringify(resp.payReq));
                r.onload = function () {
                    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;
                    }
                };
            });
        });
    }
})(TalerNotify || (TalerNotify = {}));
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