1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
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, see <http://www.gnu.org/licenses/>
*/
// tslint:disable:no-unused-expression
/**
* Module that is injected into (all!) pages to allow them
* to interact with the GNU Taler wallet via DOM Events.
*/
/**
* Imports.
*/
import wxApi = require("./wxApi");
declare var cloneInto: any;
let logVerbose: boolean = false;
try {
logVerbose = !!localStorage.getItem("taler-log-verbose");
} catch (e) {
// can't read from local storage
}
if (document.documentElement.getAttribute("data-taler-nojs")) {
document.dispatchEvent(new Event("taler-probe-result"));
}
interface Handler {
type: string;
listener: (e: Event) => void|Promise<void>;
}
const handlers: Handler[] = [];
let sheet: CSSStyleSheet|null;
function initStyle() {
logVerbose && console.log("taking over styles");
const name = "taler-presence-stylesheet";
const content = "/* Taler stylesheet controlled by JS */";
let style = document.getElementById(name) as HTMLStyleElement|null;
if (!style) {
style = document.createElement("style");
// Needed by WebKit
style.appendChild(document.createTextNode(content));
style.id = name;
document.head.appendChild(style);
sheet = style.sheet as CSSStyleSheet;
} else {
// We've taken over the stylesheet now,
// make it clear by clearing all the rules in it
// and making it obvious in the DOM.
if (style.tagName.toLowerCase() === "style") {
style.innerText = content;
}
if (!style.sheet) {
throw Error("taler-presence-stylesheet should be a style sheet (<link> or <style>)");
}
sheet = style.sheet as CSSStyleSheet;
while (sheet.cssRules.length > 0) {
sheet.deleteRule(0);
}
}
}
function setStyles(installed: boolean) {
if (!sheet || !sheet.cssRules) {
return;
}
while (sheet.cssRules.length > 0) {
sheet.deleteRule(0);
}
if (installed) {
sheet.insertRule(".taler-installed-hide { display: none; }", 0);
sheet.insertRule(".taler-probed-hide { display: none; }", 0);
} else {
sheet.insertRule(".taler-installed-show { display: none; }", 0);
}
}
function onceOnComplete(cb: () => void) {
if (document.readyState === "complete") {
cb();
} else {
document.addEventListener("readystatechange", () => {
if (document.readyState === "complete") {
cb();
}
});
}
}
function init() {
onceOnComplete(() => {
if (document.documentElement.getAttribute("data-taler-nojs")) {
initStyle();
setStyles(true);
}
});
registerHandlers();
// Hack to know when the extension is unloaded
const port = chrome.runtime.connect();
port.onDisconnect.addListener(() => {
logVerbose && console.log("chrome runtime disconnected, removing handlers");
if (document.documentElement.getAttribute("data-taler-nojs")) {
setStyles(false);
}
for (const handler of handlers) {
document.removeEventListener(handler.type, handler.listener);
}
});
}
type HandlerFn = (detail: any, sendResponse: (msg: any) => void) => void;
function registerHandlers() {
/**
* Add a handler for a DOM event, which automatically
* handles adding sequence numbers to responses.
*/
function addHandler(type: string, handler: HandlerFn) {
const handlerWrap = (e: Event) => {
if (!(e instanceof Event)) {
console.log("unexpected event", e);
throw Error(`invariant violated`);
}
if (e.type !== type) {
console.log("unexpected event type", e);
throw Error(`invariant violated`);
}
let callId: number | undefined;
let detail;
if ((e instanceof CustomEvent) && e.detail && e.detail.callId !== undefined) {
callId = e.detail.callId;
detail = e.detail;
}
const responder = (msg?: any) => {
const fullMsg = Object.assign({}, msg, {callId});
let opts = { detail: fullMsg };
if ("function" === typeof cloneInto) {
opts = cloneInto(opts, document.defaultView);
}
const evt = new CustomEvent(type + "-result", opts);
document.dispatchEvent(evt);
};
handler(detail, responder);
};
document.addEventListener(type, handlerWrap);
handlers.push({type, listener: handlerWrap});
}
addHandler("taler-query-id", (msg: any, sendResponse: any) => {
// FIXME: maybe include this info in taler-probe?
sendResponse({ id: chrome.runtime.id });
});
addHandler("taler-probe", (msg: any, sendResponse: any) => {
sendResponse();
});
addHandler("taler-create-reserve", (msg: any) => {
const uri = new URL(chrome.extension.getURL("/src/webex/pages/confirm-create-reserve.html"));
uri.searchParams.set("amount", JSON.stringify(msg.amount));
uri.searchParams.set("bank_url", document.location.href);
uri.searchParams.set("callback_url", new URL(msg.callback_url, document.location.href).href);
uri.searchParams.set("suggested_exchange_url", msg.suggested_exchange_url);
uri.searchParams.set("wt_types", JSON.stringify(msg.wt_types));
window.location.href = uri.href;
});
addHandler("taler-add-auditor", (msg: any) => {
const uri = new URL(chrome.extension.getURL("/src/webex/pages/add-auditor.html"));
uri.searchParams.set("req", JSON.stringify(msg))
window.location.href = uri.href;
});
addHandler("taler-confirm-reserve", async (msg: any, sendResponse: any) => {
const reservePub = msg.reserve_pub;
if (typeof reservePub !== "string") {
console.error("taler-confirm-reserve expects parameter reserve_pub of type 'string'");
return;
}
await wxApi.confirmReserve(msg.reserve_pub);
sendResponse();
});
}
logVerbose && console.log("loading Taler content script");
init();
|
