/*
 * Copyright 2022 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import <Foundation/Foundation.h>

@class OIDAuthState;

NS_ASSUME_NONNULL_BEGIN

@protocol GIDKeychainHandler <NSObject>

/// Loads the OIDAuthState object from the keychain.
///
/// @return an OIDAuthState object or nil if the keychain is empty.
- (nullable OIDAuthState *)loadAuthState;

/// Saves the OIDAuthState object to the keychain.
///
/// @return A `BOOL` indicating if the save succeeded.
- (BOOL)saveAuthState:(OIDAuthState *)authState;

/// Removes the OIDAuthState object saved in the keychain.
- (void)removeAllKeychainEntries;

@end

NS_ASSUME_NONNULL_END