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author | Florian Dold <florian.dold@gmail.com> | 2019-12-12 22:39:45 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2019-12-12 22:39:45 +0100 |
commit | f3329ecf062b217b2e062b92034152f623685a87 (patch) | |
tree | d21c3939ab6f1290e9077260eadc536a3138cf53 /src/db.ts | |
parent | 24650b1781820b9eca64d6b380b2f0b3ed3650f1 (diff) | |
download | wallet-core-f3329ecf062b217b2e062b92034152f623685a87.tar.xz |
refactor DB access
Diffstat (limited to 'src/db.ts')
-rw-r--r-- | src/db.ts | 119 |
1 files changed, 14 insertions, 105 deletions
@@ -1,118 +1,27 @@ import { Stores, WALLET_DB_VERSION } from "./types/dbTypes"; -import { Store, Index } from "./util/query"; +import { openDatabase, Database } from "./util/query"; -const DB_NAME = "taler"; +const TALER_DB_NAME = "taler"; /** * Return a promise that resolves * to the taler wallet db. */ -export function openDatabase( +export function openTalerDatabase( idbFactory: IDBFactory, onVersionChange: () => void, onUpgradeUnsupported: (oldVersion: number, newVersion: number) => void, ): Promise<IDBDatabase> { - return new Promise<IDBDatabase>((resolve, reject) => { - const req = idbFactory.open(DB_NAME, WALLET_DB_VERSION); - req.onerror = e => { - console.log("taler database error", e); - reject(new Error("database error")); - }; - req.onsuccess = e => { - req.result.onversionchange = (evt: IDBVersionChangeEvent) => { - console.log( - `handling live db version change from ${evt.oldVersion} to ${evt.newVersion}`, - ); - req.result.close(); - onVersionChange(); - }; - resolve(req.result); - }; - req.onupgradeneeded = e => { - const db = req.result; - console.log( - `DB: upgrade needed: oldVersion=${e.oldVersion}, newVersion=${e.newVersion}`, - ); - switch (e.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: - if (e.oldVersion !== WALLET_DB_VERSION) { - onUpgradeUnsupported(e.oldVersion, WALLET_DB_VERSION); - throw Error("incompatible DB"); - } - break; - } - }; - }); + return openDatabase( + idbFactory, + TALER_DB_NAME, + WALLET_DB_VERSION, + Stores, + onVersionChange, + onUpgradeUnsupported, + ); } -export function exportDatabase(db: IDBDatabase): Promise<any> { - const dump = { - name: db.name, - stores: {} as { [s: string]: any }, - version: db.version, - }; - - return new Promise((resolve, reject) => { - const tx = db.transaction(Array.from(db.objectStoreNames)); - tx.addEventListener("complete", () => { - resolve(dump); - }); - // tslint:disable-next-line:prefer-for-of - for (let i = 0; i < db.objectStoreNames.length; i++) { - const name = db.objectStoreNames[i]; - const storeDump = {} as { [s: string]: any }; - dump.stores[name] = storeDump; - tx.objectStore(name) - .openCursor() - .addEventListener("success", (e: Event) => { - const cursor = (e.target as any).result; - if (cursor) { - storeDump[cursor.key] = cursor.value; - cursor.continue(); - } - }); - } - }); -} - -export function importDatabase(db: IDBDatabase, dump: any): Promise<void> { - console.log("importing db", dump); - return new Promise<void>((resolve, reject) => { - const tx = db.transaction(Array.from(db.objectStoreNames), "readwrite"); - if (dump.stores) { - for (const storeName in dump.stores) { - const objects = []; - const dumpStore = dump.stores[storeName]; - for (const key in dumpStore) { - objects.push(dumpStore[key]); - } - console.log(`importing ${objects.length} records into ${storeName}`); - const store = tx.objectStore(storeName); - for (const obj of objects) { - store.put(obj); - } - } - } - tx.addEventListener("complete", () => { - resolve(); - }); - }); -} - -export function deleteDatabase(idbFactory: IDBFactory) { - idbFactory.deleteDatabase(DB_NAME); -} +export function deleteTalerDatabase(idbFactory: IDBFactory) { + Database.deleteDatabase(idbFactory, TALER_DB_NAME); +}
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