From 64e78d03a117fffeb18e18154d9028a2532285a5 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Fri, 1 Sep 2023 10:52:15 +0200
Subject: wallet-core: implement and test stored backups

---
 packages/taler-wallet-core/src/wallet.ts | 68 ++++++++++++++++++++++++++++++--
 1 file changed, 65 insertions(+), 3 deletions(-)

(limited to 'packages/taler-wallet-core/src/wallet.ts')

diff --git a/packages/taler-wallet-core/src/wallet.ts b/packages/taler-wallet-core/src/wallet.ts
index 626409dd6..5666d67e0 100644
--- a/packages/taler-wallet-core/src/wallet.ts
+++ b/packages/taler-wallet-core/src/wallet.ts
@@ -121,6 +121,11 @@ import {
   GetCurrencyInfoResponse,
   codecForGetCurrencyInfoRequest,
   CreateStoredBackupResponse,
+  StoredBackupList,
+  codecForDeleteStoredBackupRequest,
+  DeleteStoredBackupRequest,
+  RecoverStoredBackupRequest,
+  codecForRecoverStoredBackupRequest,
 } from "@gnu-taler/taler-util";
 import {
   HttpRequestLibrary,
@@ -1041,6 +1046,57 @@ async function createStoredBackup(
   };
 }
 
+async function listStoredBackups(
+  ws: InternalWalletState,
+): Promise<StoredBackupList> {
+  const storedBackups: StoredBackupList = {
+    storedBackups: [],
+  };
+  const backupsDb = await openStoredBackupsDatabase(ws.idb);
+  await backupsDb.mktxAll().runReadWrite(async (tx) => {
+    await tx.backupMeta.iter().forEach((x) => {
+      storedBackups.storedBackups.push({
+        name: x.name,
+      });
+    });
+  });
+  return storedBackups;
+}
+
+async function deleteStoredBackup(
+  ws: InternalWalletState,
+  req: DeleteStoredBackupRequest,
+): Promise<void> {
+  const backupsDb = await openStoredBackupsDatabase(ws.idb);
+  await backupsDb.mktxAll().runReadWrite(async (tx) => {
+    await tx.backupData.delete(req.name);
+    await tx.backupMeta.delete(req.name);
+  });
+}
+
+async function recoverStoredBackup(
+  ws: InternalWalletState,
+  req: RecoverStoredBackupRequest,
+): Promise<void> {
+  logger.info(`Recovering stored backup ${req.name}`);
+  const { name } = req;
+  const backupsDb = await openStoredBackupsDatabase(ws.idb);
+  const bd = await backupsDb.mktxAll().runReadWrite(async (tx) => {
+    const backupMeta = tx.backupMeta.get(name);
+    if (!backupMeta) {
+      throw Error("backup not found");
+    }
+    const backupData = await tx.backupData.get(name);
+    if (!backupData) {
+      throw Error("no backup data (DB corrupt)");
+    }
+    return backupData;
+  });
+  logger.info(`backup found, now importing`);
+  await importDb(ws.db.idbHandle(), bd);
+  logger.info(`import done`);
+}
+
 /**
  * Implementation of the "wallet-core" API.
  */
@@ -1059,12 +1115,18 @@ async function dispatchRequestInternal<Op extends WalletApiOperation>(
   switch (operation) {
     case WalletApiOperation.CreateStoredBackup:
       return createStoredBackup(ws);
-    case WalletApiOperation.DeleteStoredBackup:
+    case WalletApiOperation.DeleteStoredBackup: {
+      const req = codecForDeleteStoredBackupRequest().decode(payload);
+      await deleteStoredBackup(ws, req);
       return {};
+    }
     case WalletApiOperation.ListStoredBackups:
+      return listStoredBackups(ws);
+    case WalletApiOperation.RecoverStoredBackup: {
+      const req = codecForRecoverStoredBackupRequest().decode(payload);
+      await recoverStoredBackup(ws, req);
       return {};
-    case WalletApiOperation.RecoverStoredBackup:
-      return {};
+    }
     case WalletApiOperation.InitWallet: {
       logger.trace("initializing wallet");
       ws.initCalled = true;
-- 
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