/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#import "FBSession.h"
#import "FBSession-Private.h"

@implementation FBSession

static FBSession *_activeSession;
+ (instancetype)activeSession
{
  return _activeSession;
}

+ (void)markSessionActive:(FBSession *)session
{
  _activeSession = session;
}

+ (instancetype)sessionWithIdentifier:(NSString *)identifier
{
  if (!identifier) {
    return nil;
  }
  if (![identifier isEqualToString:_activeSession.identifier]) {
    return nil;
  }
  return _activeSession;
}

- (void)kill
{
  _activeSession = nil;
}

@end