wallet-core/extension/background/messaging.ts

/*
 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/>
 */


/**
 * Messaging for the WebExtensions wallet.  Should contain
 * parts that are specific for WebExtensions, but as little business
 * logic as possible.
 * @module Messaging
 * @author Florian Dold
 */

"use strict";

function makeHandlers(wallet) {
  return {
    ["balances"]: function(db, detail, sendResponse) {
      wallet.getBalances().then(sendResponse);
      return true;
    },
    ["dump-db"]: function(db, detail, sendResponse) {
      exportDb(db).then(sendResponse);
      return true;
    },
    ["reset"]: function(db, detail, sendResponse) {
      let tx = db.transaction(db.objectStoreNames, 'readwrite');
      for (let i = 0; i < db.objectStoreNames.length; i++) {
        tx.objectStore(db.objectStoreNames[i]).clear();
      }
      indexedDB.deleteDatabase(DB_NAME);
      chrome.browserAction.setBadgeText({text: ""});
      console.log("reset done");
      // Response is synchronous
      return false;
    },
    ["confirm-reserve"]: function(db, detail, sendResponse) {
      // TODO: make it a checkable
      let req: ConfirmReserveRequest = {
        field_amount: detail.field_amount,
        field_mint: detail.field_mint,
        field_reserve_pub: detail.field_reserve_pub,
        post_url: detail.post_url,
        mint: detail.mint,
        amount_str: detail.amount_str
      };
      wallet.confirmReserve(req)
            .then((resp) => {
              if (resp.success) {
                resp.backlink = chrome.extension.getURL(
                  "pages/reserve-success.html");
              }
              sendResponse(resp);
            });
      return true;
    },
    ["confirm-pay"]: function(db, detail, sendResponse) {
      wallet.confirmPay(detail.offer, detail.merchantPageUrl)
            .then(() => {
              sendResponse({success: true})
            })
            .catch((e) => {
              sendResponse({error: e.message});
            });
      return true;
    },
    ["execute-payment"]: function(db, detail, sendResponse) {
      wallet.doPayment(detail.H_contract)
            .then((r) => {
              sendResponse({
                             success: true,
                             payUrl: r.payUrl,
                             payReq: r.payReq
                           });
            })
            .catch((e) => {
              sendResponse({success: false, error: e.message});
            });
      // async sendResponse
      return true;
    }
  };
}

class ChromeBadge {
  setText(s: string) {
    chrome.browserAction.setBadgeText({text: s});
  }

  setColor(c: string) {
    chrome.browserAction.setBadgeBackgroundColor({color: c});
  }
}


function wxMain() {
  chrome.browserAction.setBadgeText({text: ""});

  openTalerDb().then((db) => {
    let http = new BrowserHttpLib();
    let badge = new ChromeBadge();
    let wallet = new Wallet(db, http, badge);
    let handlers = makeHandlers(wallet);
    wallet.updateBadge();
    chrome.runtime.onMessage.addListener(
      function(req, sender, onresponse) {
        if (req.type in handlers) {
          return handlers[req.type](db, req.detail, onresponse);
        }
        console.error(format("Request type {1} unknown, req {0}",
                             JSON.stringify(req),
                             req.type));
        return false;
      });
  });
}

wxMain();