text: //
  // Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License").
  // You may not use this file except in compliance with the License.
  // A copy of the License is located at
  //
  // http://aws.amazon.com/apache2.0
  //
  // or in the "license" file accompanying this file. This file 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>
  #import "AWSMobileAnalyticsContext.h"
  
  FOUNDATION_EXPORT NSString *const AWSMobileAnalyticsSessionIDDateFormat;
  FOUNDATION_EXPORT NSString *const AWSMobileAnalyticsSessionIDTimeFormat;
  FOUNDATION_EXPORT char const AWSMobileAnalyticsSessionIDDelimiter;
  FOUNDATION_EXPORT char const AWSMobileAnalyticsSessionIDPadChar;
  FOUNDATION_EXPORT NSUInteger const AWSMobileAnalyticsSessionIDAppKeyLength;
  FOUNDATION_EXPORT NSUInteger const AWSMobileAnalyticsSessionIDUniqIDLength;
  
  /**
   * An Immutable Session Object
  
   * Represents a developer-defined session in the Mobile Analytics SDK.
   *
   * Is (presently) only used by the Default Session Client [AWSMobileAnalyticsDefaultSessionClient]
   *   as an immutable object. It either exists - and is considered "active" - or it does
   *   not.
   *
   * @author Dirk Hortensius [hortensi@amazon.com]
   */
  @interface AWSMobileAnalyticsSession : NSObject
  
  @property (nonatomic, strong, readonly) NSDate *startTime;
  @property (nonatomic, strong, readonly) NSDate *stopTime;
  @property (nonatomic, strong, readonly) NSString *sessionId;
  
  /**
   * Requires Insights context for unique session id generation.
   */
  - (instancetype)initWithContext:(id <AWSMobileAnalyticsContext>)context;
  
  - (instancetype)initWithSessionId:(NSString *)sessionId
                      withStartTime:(NSDate *)startTime
                       withStopTime:(NSDate *)stopTime;
  
  /**
   *
   */
  - (UTCTimeMillis) timeDurationInMillis;
  
  /**
   *
   */
  - (void)stop;
  
  - (BOOL)isPaused;
  
  - (void)pause;
  
  - (void)resume;
  
  @end
  