From 49e3b3e5b9bbf1ce356ef68f301d50c689ceecb9 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Thu, 19 Dec 2019 13:48:37 +0100
Subject: prepare for schema migrations

---
 src/db.ts | 37 ++++++++++++++++++++++++++++++-------
 1 file changed, 30 insertions(+), 7 deletions(-)

(limited to 'src/db.ts')

diff --git a/src/db.ts b/src/db.ts
index e1c5c8f85..da43cf827 100644
--- a/src/db.ts
+++ b/src/db.ts
@@ -1,7 +1,7 @@
 import { Stores } from "./types/dbTypes";
-import { openDatabase, Database } from "./util/query";
+import { openDatabase, Database, Store, Index } from "./util/query";
 
-const TALER_DB_NAME = "taler";
+const TALER_DB_NAME = "taler-wallet";
 
 /**
  * Current database version, should be incremented
@@ -9,7 +9,7 @@ const TALER_DB_NAME = "taler";
  * In the future we might consider adding migration functions for
  * each version increment.
  */
-export const WALLET_DB_VERSION = 28;
+export const WALLET_DB_VERSION = 1;
 
 /**
  * Return a promise that resolves
@@ -18,18 +18,41 @@ export const WALLET_DB_VERSION = 28;
 export function openTalerDatabase(
   idbFactory: IDBFactory,
   onVersionChange: () => void,
-  onUpgradeUnsupported: (oldVersion: number, newVersion: number) => void,
 ): Promise<IDBDatabase> {
+  const onUpgradeNeeded = (
+    db: IDBDatabase,
+    oldVersion: number,
+    newVersion: number,
+  ) => {
+    switch (oldVersion) {
+      case 0: // DB does not exist yet
+        for (const n in Stores) {
+          if ((Stores as any)[n] instanceof Store) {
+            const si: Store<any> = (Stores as any)[n];
+            const s = db.createObjectStore(si.name, si.storeParams);
+            for (const indexName in si as any) {
+              if ((si as any)[indexName] instanceof Index) {
+                const ii: Index<any, any> = (si as any)[indexName];
+                s.createIndex(ii.indexName, ii.keyPath, ii.options);
+              }
+            }
+          }
+        }
+        break;
+      default:
+        throw Error("unsupported existig DB version");
+    }
+  };
+
   return openDatabase(
     idbFactory,
     TALER_DB_NAME,
     WALLET_DB_VERSION,
-    Stores,
     onVersionChange,
-    onUpgradeUnsupported,
+    onUpgradeNeeded,
   );
 }
 
 export function deleteTalerDatabase(idbFactory: IDBFactory) {
   Database.deleteDatabase(idbFactory, TALER_DB_NAME);
-}
\ No newline at end of file
+}
-- 
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