//
//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

// These NSTimeInterval constants provide simplified durations for readability.
//
// These approximations should never be used for strict date/time calcuations.
extern const NSTimeInterval kSecondInterval;
extern const NSTimeInterval kMinuteInterval;
extern const NSTimeInterval kHourInterval;
extern const NSTimeInterval kDayInterval;
extern const NSTimeInterval kWeekInterval;
extern const NSTimeInterval kMonthInterval;
extern const NSTimeInterval kYearInterval;

#define kSecondInMs ((uint64_t)1000)
#define kMinuteInMs (kSecondInMs * 60)
#define kHourInMs (kMinuteInMs * 60)
#define kDayInMs (kHourInMs * 24)
#define kWeekInMs (kDayInMs * 7)
#define kMonthInMs (kDayInMs * 30)

// kYearsInMs is a double to avoid overflow
#define kYearsInMs (kDayInMs * 365.0)

@interface NSDate (OWS)

+ (uint64_t)ows_millisecondTimeStamp;
+ (NSDate *)ows_dateWithMillisecondsSince1970:(uint64_t)milliseconds;
+ (uint64_t)ows_millisecondsSince1970ForDate:(NSDate *)date;

- (BOOL)isAfterDate:(NSDate *)otherDate;
- (BOOL)isBeforeDate:(NSDate *)otherDate;

- (BOOL)isAfterNow;
- (BOOL)isBeforeNow;

@end

NS_ASSUME_NONNULL_END