keychain/SecureObjectSync/SOSIntervalEvent.m

   1 //
   2 //  SOSIntervalEvent.m
   3 //  Security_ios
   4 //
   5 //  Created by murf on 9/12/19.
   6 //
   7
   8 #import <Foundation/Foundation.h>
   9 #import "SOSIntervalEvent.h"
  10 #import "keychain/SecureObjectSync/SOSInternal.h"
  11
  12 /*
  13
  14  interval setting examples:
  15  NSTimeInterval earliestGB   = 60*60*24*3;  // wait at least 3 days
  16  NSTimeInterval latestGB     = 60*60*24*7;  // wait at most 7 days
  17
  18  pattern:
  19
  20 SOSIntervalEvent fooEvent = [[SOSIntervalEvent alloc] initWithDefaults:account.settings dateDescription:@"foocheck" earliest:60*60*24 latest:60*60*36];
  21
  22  // should we foo?
  23     if([fooEvent checkDate]) {
  24         WeDoFooToo();
  25         // schedule next foo
  26         [fooEvent followup];
  27     }
  28     // "schedule" is only used if you think there's a date upcoming you don't want altered
  29     // getDate will return the next schedule event date
  30  */
  31
  32 @implementation SOSIntervalEvent
  33
  34 - (NSDate *) getDate {
  35     return [_defaults valueForKey: _dateDescription];
  36 }
  37
  38 - (bool) checkDate {
  39     NSDate *theDate = [self getDate];
  40     if(theDate && ([theDate timeIntervalSinceNow] <= 0)) return true;
  41     return false;
  42 }
  43
  44 - (void) followup {
  45     NSDate *theDate = SOSCreateRandomDateBetweenNowPlus(_earliestDate, _latestDate);
  46     [_defaults setValue:theDate forKey: _dateDescription];
  47 }
  48
  49 - (void)schedule {
  50     NSDate *theDate = [self getDate];
  51     if(!theDate) {
  52         [self followup];
  53     }
  54 }
  55
  56 -(id)initWithDefaults:(NSUserDefaults*) defaults dateDescription:(NSString *)dateDescription earliest:(NSTimeInterval) earliest latest: (NSTimeInterval) latest {
  57     if ((self = [super init])) {
  58         _defaults = defaults;
  59         if(! _defaults) {
  60             _defaults =  [[NSUserDefaults alloc] init];
  61         }
  62         _dateDescription = dateDescription;
  63         _earliestDate = earliest;
  64         _latestDate = latest;
  65         [self schedule];
  66     }
  67     return self;
  68 }
  69
  70 @end
  71