fix: backup improvement. (#26)

* feat: add pluto export and import database functionality

* fix: Improve database.

README.md

@@ -38,6 +38,15 @@ const db = await Database.createEncrypted(
     password
 );
 const messages = await db.getAllMessages();
+
+const backup = await db.backup();
+const db = await Database.createEncrypted(
+    databaseName + "restored",
+    password,
+    backup
+);
+
+
 ```
 
 If the database is later initialised with the wrong password the "createEncrypted" async function will throw an exception and will not let you decrypt any encrypted content.

src/index.ts

@@ -83,19 +83,27 @@ export class Database implements Domain.Pluto {
     return this.db.exportJSON();
   }
 
-  async import(importData: RxDumpDatabase<PlutoCollections>) {
-    await this.db.importJSON(importData);
-  }
-
-  static async createEncrypted(name: string, encryptionKey: Uint8Array) {
-    return new Database({
+  static async createEncrypted(
+    name: string,
+    encryptionKey: Uint8Array,
+    importData?: RxDumpDatabase<PlutoCollections>
+  ) {
+    const database = new Database({
       ignoreDuplicate: true,
       name: name,
       storage: wrappedKeyEncryptionCryptoJsStorage({
         storage: getRxStorageDexie(),
       }),
       password: Buffer.from(encryptionKey).toString("hex"),
     });
+
+    await database.start();
+
+    if (importData) {
+      await database.db.importJSON(importData);
+    }
+
+    return database;
   }
 
   async getMessage(id: string): Promise<Domain.Message | null> {

tests/pluto.test.ts

@@ -47,20 +47,12 @@ describe("Pluto + Dexie encrypted integration for browsers", () => {
     sandbox = sinon.createSandbox();
   });
 
-  it("Should require to start pluto database before using it", async () => {
-    const db = await Database.createEncrypted(databaseName, defaultPassword);
-    expect(db.getAllMessages()).rejects.toThrowError(
-      new Error("Start Pluto first.")
-    );
-  });
-
   it("Should be able to instanciate an encrypted IndexDB Database and throw an error if started with wrong password", async () => {
     async function createAndLoad(password: Uint8Array) {
       const db = await Database.createEncrypted(
         databaseName,
         Buffer.from(password)
       );
-      await db.start();
       const messages = await db.getAllMessages();
       expect(messages.length).toEqual(0);
     }
@@ -84,7 +76,6 @@ describe("Pluto + Dexie encrypted integration for browsers", () => {
         `${databaseName}${randomUUID()}`,
         defaultPassword
       );
-      await db.start();
     });
 
     it("Should store a new Prism DID and its privateKeys", async () => {
@@ -443,10 +434,9 @@ describe("Pluto + Dexie encrypted integration for browsers", () => {
 
       const restored = await Database.createEncrypted(
         `${databaseName}${randomUUID()}`,
-        defaultPassword
+        defaultPassword,
+        backup
       );
-      await restored.start();
-      await restored.import(backup);
 
       expect((await restored.getAllMediators()).length).toBe(1);
     });