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authorFlorian Dold <florian.dold@gmail.com>2016-11-13 23:30:18 +0100
committerFlorian Dold <florian.dold@gmail.com>2016-11-13 23:31:17 +0100
commitf3fb8be7db6de87dae40d41bd5597a735c800ca1 (patch)
tree1a061db04de8f5bb5a6b697fa56a9948f67fac2f /src/db.ts
parent200d83c3886149ebb3f018530302079e12a81f6b (diff)
restructuring
Diffstat (limited to 'src/db.ts')
-rw-r--r--src/db.ts117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/db.ts b/src/db.ts
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+++ b/src/db.ts
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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, see <http://www.gnu.org/licenses/>
+ */
+
+"use strict";
+import {IExchangeInfo} from "./types";
+
+/**
+ * Declarations and helpers for
+ * things that are stored in the wallet's
+ * database.
+ * @module Db
+ * @author Florian Dold
+ */
+
+const DB_NAME = "taler";
+const DB_VERSION = 11;
+
+import {Stores} from "./wallet";
+import {Store, Index} from "./query";
+
+
+
+
+
+/**
+ * Return a promise that resolves
+ * to the taler wallet db.
+ */
+export function openTalerDb(): Promise<IDBDatabase> {
+ return new Promise((resolve, reject) => {
+ const req = indexedDB.open(DB_NAME, DB_VERSION);
+ req.onerror = (e) => {
+ reject(e);
+ };
+ req.onsuccess = (e) => {
+ resolve(req.result);
+ };
+ req.onupgradeneeded = (e) => {
+ const db = req.result;
+ console.log("DB: upgrade needed: oldVersion = " + e.oldVersion);
+ switch (e.oldVersion) {
+ case 0: // DB does not exist yet
+
+ for (let n in Stores) {
+ if ((Stores as any)[n] instanceof Store) {
+ let si: Store<any> = (Stores as any)[n];
+ const s = db.createObjectStore(si.name, si.storeParams);
+ for (let indexName in (si as any)) {
+ if ((si as any)[indexName] instanceof Index) {
+ let ii: Index<any,any> = (si as any)[indexName];
+ s.createIndex(ii.indexName, ii.keyPath);
+ }
+ }
+ }
+ }
+ break;
+ default:
+ if (e.oldVersion != DB_VERSION) {
+ window.alert("Incompatible wallet dababase version, please reset" +
+ " db.");
+ chrome.browserAction.setBadgeText({text: "err"});
+ chrome.browserAction.setBadgeBackgroundColor({color: "#F00"});
+ throw Error("incompatible DB");
+ }
+ break;
+ }
+ };
+ });
+}
+
+
+export function exportDb(db: IDBDatabase): Promise<any> {
+ let dump = {
+ name: db.name,
+ version: db.version,
+ stores: {} as {[s: string]: any},
+ };
+
+ return new Promise((resolve, reject) => {
+
+ let tx = db.transaction(Array.from(db.objectStoreNames));
+ tx.addEventListener("complete", () => {
+ resolve(dump);
+ });
+ for (let i = 0; i < db.objectStoreNames.length; i++) {
+ let name = db.objectStoreNames[i];
+ let storeDump = {} as {[s: string]: any};
+ dump.stores[name] = storeDump;
+ let store = tx.objectStore(name)
+ .openCursor()
+ .addEventListener("success", (e: Event) => {
+ let cursor = (e.target as any).result;
+ if (cursor) {
+ storeDump[cursor.key] = cursor.value;
+ cursor.continue();
+ }
+ });
+ }
+ });
+}
+
+export function deleteDb() {
+ indexedDB.deleteDatabase(DB_NAME);
+}