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/*
This file is part of TALER
(C) 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/>
*/
import {Wallet, Offer, Badge, ConfirmReserveRequest, CreateReserveRequest} from "./wallet";
import {deleteDb, exportDb, openTalerDb} from "./db";
import {BrowserHttpLib} from "./http";
import {Checkable} from "./checkable";
import {AmountJson} from "./types";
import Port = chrome.runtime.Port;
import {Notifier} from "./types";
import {Contract} from "./wallet";
"use strict";
/**
* Messaging for the WebExtensions wallet. Should contain
* parts that are specific for WebExtensions, but as little business
* logic as possible.
*
* @author Florian Dold
*/
type Handler = (detail: any) => Promise<any>;
function makeHandlers(db: IDBDatabase,
wallet: Wallet): {[msg: string]: Handler} {
return {
["balances"]: function(detail) {
return wallet.getBalances();
},
["dump-db"]: function(detail) {
return exportDb(db);
},
["reset"]: function(detail) {
if (db) {
let tx = db.transaction(db.objectStoreNames, 'readwrite');
for (let i = 0; i < db.objectStoreNames.length; i++) {
tx.objectStore(db.objectStoreNames[i]).clear();
}
}
deleteDb();
chrome.browserAction.setBadgeText({text: ""});
console.log("reset done");
// Response is synchronous
return Promise.resolve({});
},
["create-reserve"]: function(detail) {
const d = {
exchange: detail.exchange,
amount: detail.amount,
};
const req = CreateReserveRequest.checked(d);
return wallet.createReserve(req);
},
["confirm-reserve"]: function(detail) {
// TODO: make it a checkable
const d = {
reservePub: detail.reservePub
};
const req = ConfirmReserveRequest.checked(d);
return wallet.confirmReserve(req);
},
["confirm-pay"]: function(detail) {
let offer;
try {
offer = Offer.checked(detail.offer);
} catch (e) {
if (e instanceof Checkable.SchemaError) {
console.error("schema error:", e.message);
return Promise.resolve({
error: "invalid contract",
hint: e.message,
detail: detail
});
} else {
throw e;
}
}
return wallet.confirmPay(offer);
},
["execute-payment"]: function(detail) {
return wallet.executePayment(detail.H_contract);
},
["exchange-info"]: function(detail) {
if (!detail.baseUrl) {
return Promise.resolve({error: "bad url"});
}
return wallet.updateExchangeFromUrl(detail.baseUrl);
},
["reserve-creation-info"]: function(detail) {
if (!detail.baseUrl || typeof detail.baseUrl !== "string") {
return Promise.resolve({error: "bad url"});
}
let amount = AmountJson.checked(detail.amount);
return wallet.getReserveCreationInfo(detail.baseUrl, amount);
},
["check-repurchase"]: function(detail) {
let contract = Contract.checked(detail.contract);
return wallet.checkRepurchase(contract);
},
["get-history"]: function(detail) {
// TODO: limit history length
return wallet.getHistory();
},
};
}
class ChromeBadge implements Badge {
setText(s: string) {
chrome.browserAction.setBadgeText({text: s});
}
setColor(c: string) {
chrome.browserAction.setBadgeBackgroundColor({color: c});
}
}
function dispatch(handlers, req, sendResponse) {
if (req.type in handlers) {
Promise
.resolve()
.then(() => {
const p = handlers[req.type](req.detail);
return p.then((r) => {
sendResponse(r);
})
})
.catch((e) => {
console.log(`exception during wallet handler for '${req.type}'`);
console.log("request", req);
console.error(e);
sendResponse({
error: "exception",
hint: e.message,
stack: e.stack.toString()
});
});
// The sendResponse call is async
return true;
} else {
console.error(`Request type ${JSON.stringify(req)} unknown, req ${req.type}`);
sendResponse({error: "request unknown"});
// The sendResponse call is sync
return false;
}
}
class ChromeNotifier implements Notifier {
ports: Port[] = [];
constructor() {
chrome.runtime.onConnect.addListener((port) => {
console.log("got connect!");
this.ports.push(port);
port.onDisconnect.addListener(() => {
let i = this.ports.indexOf(port);
if (i >= 0) {
this.ports.splice(i, 1);
} else {
console.error("port already removed");
}
});
});
}
notify() {
console.log("notifying all ports");
for (let p of this.ports) {
p.postMessage({notify: true});
}
}
}
export function wxMain() {
chrome.browserAction.setBadgeText({text: ""});
Promise.resolve()
.then(() => {
return openTalerDb();
})
.catch((e) => {
console.error("could not open database");
console.error(e);
})
.then((db) => {
let http = new BrowserHttpLib();
let badge = new ChromeBadge();
let notifier = new ChromeNotifier();
let wallet = new Wallet(db, http, badge, notifier);
let handlers = makeHandlers(db, wallet);
chrome.runtime.onMessage.addListener((req, sender, sendResponse) => {
try {
return dispatch(handlers, req, sendResponse)
} catch (e) {
console.log(`exception during wallet handler (dispatch)`);
console.log("request", req);
console.error(e);
sendResponse({
error: "exception",
hint: e.message,
stack: e.stack.toString()
});
return false;
}
});
})
.catch((e) => {
console.error("could not initialize wallet messaging");
console.error(e);
});
}
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