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#import <Foundation/Foundation.h>
#import "DateRange.h"
@implementation DateRange
- (id)initWithStart:(Date *)date duration:(NSTimeInterval)seconds
{
self = [super init];
if (self) {
_length = seconds;
_start = [date retain];
}
return self;
}
- (id)initWithDay:(Date *)day
{
NSAssert([day isDate], @"This method expects a date, not a datetime");
return [self initWithStart:day duration:86400];
}
- (void)dealloc
{
[_start release];
[super dealloc];
}
- (Date *)start
{
return _start;
}
- (void)setStart:(Date *)start
{
ASSIGN(_start, start);
}
- (NSTimeInterval)length
{
return _length;
}
- (void)setLength:(NSTimeInterval)length
{
_length = length;
}
- (BOOL)contains:(Date *)date
{
if ([_start compare:date withTime:YES] > 0)
return NO;
if ([date timeIntervalSinceDate:_start] > _length)
return NO;
return YES;
}
- (BOOL)intersectsWith:(DateRange *)range
{
NSTimeInterval s1 = [_start timeIntervalSince1970];
NSTimeInterval e1 = s1 + _length;
NSTimeInterval s2 = [[range start] timeIntervalSince1970];
NSTimeInterval e2 = s2 + [range length];
NSTimeInterval s = MAX(s1, s2);
NSTimeInterval e = MIN(e1, e2);
if (e <= s)
return NO;
return YES;
}
- (BOOL)intersectsWithDay:(Date *)day
{
NSAssert([day isDate], @"This method expects a date, not a datetime");
NSTimeInterval s1 = [_start timeIntervalSince1970];
NSTimeInterval e1 = s1 + _length;
NSTimeInterval s2 = [day timeIntervalSince1970];
NSTimeInterval e2 = s2 + 86400;
NSTimeInterval s = MAX(s1, s2);
NSTimeInterval e = MIN(e1, e2);
if (e <= s)
return NO;
return YES;
}
- (NSRange)intersectionWithDay:(Date *)day
{
NSAssert([day isDate], @"This method expects a date, not a datetime");
NSTimeInterval s1 = [_start timeIntervalSince1970];
NSTimeInterval e1 = s1 + _length;
NSTimeInterval s2 = [day timeIntervalSince1970];
NSTimeInterval e2 = s2 + 86400;
NSTimeInterval s = MAX(s1, s2);
NSTimeInterval e = MIN(e1, e2);
if (e <= s)
return NSMakeRange(0, 0);
return NSMakeRange(s - s2, e - s);
}
- (NSString *)description
{
return [NSString stringWithFormat:@"DateRange starting %@ for %d seconds", [_start description], (int)_length];
}
@end
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