feat: impl account password changing

packages/core/api/outbox.js

@@ -0,0 +1,43 @@
+class Outbox {
+  /**
+   *
+   * @param {import("./index").default} db
+   */
+  constructor(db) {
+    this._db = db;
+    this.outbox = {};
+  }
+
+  async init() {
+    this.outbox = (await this._db.context.read("outbox")) || {};
+
+    for (var id in this.outbox) {
+      const data = this.outbox[id];
+      switch (id) {
+        case "changePassword":
+          const key = await this._db.user.key();
+          const { username } = await this._db.user.get();
+          await this._db.context.deriveCryptoKey(`_uk_@${username}`, {
+            password: data.newPassword,
+            salt: key.salt,
+          });
+          await this._db.sync(false, true);
+          await this.delete(id);
+          break;
+      }
+    }
+  }
+
+  async add(id, data, action) {
+    this.outbox[id] = data;
+    await this._db.context.write("outbox", this.outbox);
+    await action();
+    await this.delete(id);
+  }
+
+  delete(id) {
+    delete this.outbox[id];
+    return this._db.context.write("outbox", this.outbox);
+  }
+}
+export default Outbox;