// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Use the <code>chrome.loginScreenStorage</code> API to store persistent data
// from the login screen or inject data into the session.
[platforms=("chromeos", "lacros"),
 implemented_in="chrome/browser/chromeos/extensions/login_screen/login_screen_storage/login_screen_storage_api.h"]
namespace loginScreenStorage {
  callback StoreCallback = void ();
  callback RetrieveCallback = void (DOMString data);

  interface Functions {
    // Stores persistent data from the login screen. This data can be accessed
    // later using $(ref:retrievePersistentData) by any extension from the
    // specified extension ids. This method will fail if called while a user
    // session is active.
    // |extensionIds|: IDs of the extensions that should have access to the
    // stored data.
    // |data|: The data to store.
    static void storePersistentData(
        DOMString[] extensionIds,
        DOMString data,
        StoreCallback callback);

    // Retrieves persistent data that was previously stored using
    // $(ref:storePersistentData) for the caller's extension ID.
    // |ownerId|: ID of the extension that saved the data that the caller is
    // trying to retrieve.
    static void retrievePersistentData(
        DOMString ownerId,
        RetrieveCallback callback);

    // Stores credentials for later access from the user session. This method
    // will fail if called while a user session is active.
    // |extensionId|: ID of the in-session extension that should have access to
    // these credentials. Credentials stored using this method are deleted on
    // session exit.
    // |credentials|: The credentials to store.
    static void storeCredentials(
        DOMString extensionId,
        DOMString credentials,
        StoreCallback callback);

    // Retrieves credentials that were previosly stored using
    // $(ref:storeCredentials). The caller's extension ID should be the same as
    // the extension id passed to the $(ref:storeCredentials).
    static void retrieveCredentials(
        RetrieveCallback callback);
  };
};