54 lines
1.5 KiB
Objective-C
54 lines
1.5 KiB
Objective-C
#import "TimeIntervalTransformer.h"
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@implementation TimeIntervalTransformer
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+ (Class)transformedValueClass {
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return [NSString class];
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}
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+ (BOOL)allowsReverseTransformation {
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return NO;
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}
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NSString *NumberAndUnitString(NSInteger quantity, NSString *singular, NSString *plural) {
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return [NSString stringWithFormat:@"%ld %@", quantity, quantity == 1 ? singular : plural];
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}
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- (id)transformedValue:(id)value {
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if (![value isKindOfClass:[NSValue class]]) {
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return nil;
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}
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NSTimeInterval timeInterval = [value doubleValue];
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NSInteger seconds = floor(timeInterval);
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NSInteger minutes = floor(seconds / 60);
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seconds -= minutes * 60;
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NSInteger hours = floor(minutes / 60);
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minutes -= hours * 60;
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NSInteger days = floor(hours / 24);
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hours -= days * 24;
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NSInteger weeks = floor(days) / 7;
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days -= weeks * 7;
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NSMutableArray *components = [NSMutableArray array];
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if (seconds || timeInterval < 60) {
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[components addObject:NumberAndUnitString(seconds, @"second", @"seconds")];
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}
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if (minutes) {
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[components insertObject:NumberAndUnitString(minutes, @"minute", @"minutes") atIndex:0];
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}
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if (hours) {
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[components insertObject:NumberAndUnitString(hours, @"hour", @"hours") atIndex:0];
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}
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if (days) {
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[components insertObject:NumberAndUnitString(days, @"day", @"days") atIndex:0];
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}
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if (weeks) {
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[components insertObject:NumberAndUnitString(weeks, @"week", @"weeks") atIndex:0];
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}
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return [components componentsJoinedByString:@", "];
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}
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@end
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