/*
 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/>
 */
"use strict";
const DB_NAME = "taler";
const DB_VERSION = 1;
/**
 * Return a promise that resolves
 * to the taler wallet db.
 */
function openTalerDb() {
    return new Promise((resolve, reject) => {
        let req = indexedDB.open(DB_NAME, DB_VERSION);
        req.onerror = (e) => {
            reject(e);
        };
        req.onsuccess = (e) => {
            resolve(req.result);
        };
        req.onupgradeneeded = (e) => {
            let db = req.result;
            console.log("DB: upgrade needed: oldVersion = " + e.oldVersion);
            switch (e.oldVersion) {
                case 0:
                    let mints = db.createObjectStore("mints", { keyPath: "baseUrl" });
                    mints.createIndex("pubKey", "keys.master_public_key");
                    db.createObjectStore("reserves", { keyPath: "reserve_pub" });
                    db.createObjectStore("denoms", { keyPath: "denomPub" });
                    let coins = db.createObjectStore("coins", { keyPath: "coinPub" });
                    coins.createIndex("mintBaseUrl", "mintBaseUrl");
                    db.createObjectStore("transactions", { keyPath: "contractHash" });
                    db.createObjectStore("precoins", { keyPath: "coinPub", autoIncrement: true });
                    db.createObjectStore("history", { keyPath: "id", autoIncrement: true });
                    break;
            }
        };
    });
}
function exportDb(db) {
    let dump = {
        name: db.name,
        version: db.version,
        stores: {}
    };
    return new Promise((resolve, reject) => {
        let tx = db.transaction(db.objectStoreNames);
        tx.addEventListener("complete", (e) => {
            resolve(dump);
        });
        for (let i = 0; i < db.objectStoreNames.length; i++) {
            let name = db.objectStoreNames[i];
            let storeDump = {};
            dump.stores[name] = storeDump;
            let store = tx.objectStore(name)
                .openCursor()
                .addEventListener("success", (e) => {
                let cursor = e.target.result;
                if (cursor) {
                    storeDump[cursor.key] = cursor.value;
                    cursor.continue();
                }
            });
        }
    });
}