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Complete implementation of intersectionWithDateInterval:

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This commit is contained in:
Gregory John Casamento 2019-10-16 07:44:58 -04:00
parent 58a7201645
commit 7fdf119354
1 changed files with 43 additions and 2 deletions
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45
Source/NSDateInterval.m
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@ -25,6 +25,7 @@
#include <Foundation/NSDateInterval.h>
#include <Foundation/NSDate.h>
#include <Foundation/NSArray.h>
@implementation NSDateInterval
@ -129,16 +130,19 @@
if([_startDate isEqualToDate: [dateInterval startDate]] &&
_duration < [dateInterval duration])
return NSOrderedAscending;
if([_startDate compare: [dateInterval startDate]] == NSOrderedAscending)
return NSOrderedAscending;
// NSOrderedSame
// NSOrderedSame
if([self isEqualToDateInterval: dateInterval])
return NSOrderedSame;
// NSOrderedDescending
if([_startDate isEqualToDate: [dateInterval startDate]] &&
_duration > [dateInterval duration])
return NSOrderedDescending;
if([_startDate compare: [dateInterval startDate]] == NSOrderedDescending)
return NSOrderedDescending;
@ -159,7 +163,44 @@
- (NSDateInterval *) intersectionWithDateInterval: (NSDateInterval *)dateInterval
{
return nil;
NSDateInterval *result = nil;
NSArray *array = [NSArray arrayWithObjects: self, dateInterval, nil];
NSArray *sortedArray = [array sortedArrayUsingSelector: @selector(compare:)];
NSDateInterval *first = [sortedArray firstObject];
NSDateInterval *last = [sortedArray lastObject];
NSDate *intersectStartDate = nil;
NSDate *intersectEndDate = nil;
// Max of start date....
if([[first startDate] compare: [last startDate]] == NSOrderedAscending ||
[[first startDate] isEqualToDate: [last startDate]])
{
intersectStartDate = [last startDate];
}
if([[first startDate] compare: [last startDate]] == NSOrderedDescending)
{
intersectStartDate = [first startDate];
}
// Min of end date...
if([[first endDate] compare: [last endDate]] == NSOrderedDescending ||
[[first endDate] isEqualToDate: [last endDate]])
{
intersectEndDate = [last endDate];
}
if([[first endDate] compare: [last endDate]] == NSOrderedAscending)
{
intersectEndDate = [first endDate];
}
if([intersectStartDate compare: intersectEndDate] == NSOrderedAscending)
{
result = [[NSDateInterval alloc] initWithStartDate: intersectStartDate
endDate: intersectEndDate];
AUTORELEASE(result);
}
return result;
}
// Contain