CircleJoinRequested/NSDate+TimeIntervalDescription.m

   1 //
   2 //  NSDate+TimeIntervalDescription.m
   3 //  Security
   4 //
   5 //  Created by J Osborne on 7/17/13.
   6 //
   7 //
   8
   9 #import "NSDate+TimeIntervalDescription.h"
  10 #include <math.h>
  11 #import <Security/SecFrameworkStrings.h>
  12 #import <Foundation/NSObjCRuntime.h>
  13
  14 @implementation NSDate (TimeIntervalDescription)
  15
  16 -(NSString*)copyDescriptionOfIntervalSince:(NSDate *)originalDate
  17 {
  18         // This is really expected to be "1 day", "N days" in production, but for testing we
  19         // use very small intervals, and we may as well have that work out.
  20
  21         NSTimeInterval seconds = [self timeIntervalSinceDate:originalDate];
  22         if (seconds <= 0) {
  23                 return (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_FUTURE);
  24         }
  25         if (seconds == 0) {
  26                 return (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_NOW);
  27         }
  28         if (seconds < 1) {
  29                 return (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_SUBSECOND);
  30         }
  31         if (seconds < 120) {
  32                 return [NSString stringWithFormat:@"%d %@", (int)seconds, (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_SECONDS)];
  33         }
  34         if (seconds < 2*60*60) {
  35                 return [NSString stringWithFormat:@"%d %@", (int)seconds/60, (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_MINUTES)];
  36         }
  37         if (seconds < 60*60*24) {
  38                 return [NSString stringWithFormat:@"%d %@", (int)seconds/(60*60), (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_HOURS)];
  39         }
  40
  41     double days = nearbyint(seconds/(60*60*24));
  42     // XXX "day" vs. "days"
  43         return [NSString stringWithFormat:@"%.0f %@", days, (days == 1) ? (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_DAY) : (__bridge_transfer NSString*)SecCopyCKString(SEC_CK_TID_DAYS)];
  44 }
  45
  46 @end