NSDate category method for generating "time ago" string

NSDate-TimeAgo.h

- (NSString *)timeAgo
{
    NSDate *now = [NSDate date];
    double deltaSeconds = fabs([self timeIntervalSinceDate:now]);
    double deltaMinutes = deltaSeconds / 60.0f;
    
    int minutes;
    
    if(deltaSeconds < 5)
    {
        return NSDateTimeAgoLocalizedStrings(@"Just now");
    }
    else if(deltaSeconds < 60)
    {
        return [self stringFromFormat:@"%%d %@seconds ago" withValue:deltaSeconds];
    }
    else if(deltaSeconds < 120)
    {
        return NSDateTimeAgoLocalizedStrings(@"1 minute ago");
    }
    else if (deltaMinutes < 60)
    {
        return [self stringFromFormat:@"%%d %@minutes ago" withValue:deltaMinutes];
    }
    else if (deltaMinutes < 120)
    {
        return NSDateTimeAgoLocalizedStrings(@"An hour ago");
    }
    else if (deltaMinutes < (24 * 60))
    {
        minutes = (int)floor(deltaMinutes/60);
        return [self stringFromFormat:@"%%d %@hours ago" withValue:minutes];
    }
    else if (deltaMinutes < (24 * 60 * 2))
    {
        return NSDateTimeAgoLocalizedStrings(@"Yesterday");
    }
    else if (deltaMinutes < (24 * 60 * 7))
    {
        minutes = (int)floor(deltaMinutes/(60 * 24));
        return [self stringFromFormat:@"%%d %@days ago" withValue:minutes];
    }
    else if (deltaMinutes < (24 * 60 * 14))
    {
        return NSDateTimeAgoLocalizedStrings(@"Last week");
    }
    else if (deltaMinutes < (24 * 60 * 31))
    {
        minutes = (int)floor(deltaMinutes/(60 * 24 * 7));
        return [self stringFromFormat:@"%%d %@weeks ago" withValue:minutes];
    }
    else if (deltaMinutes < (24 * 60 * 61))
    {
        return NSDateTimeAgoLocalizedStrings(@"Last month");
    }
    else if (deltaMinutes < (24 * 60 * 365.25))
    {
        minutes = (int)floor(deltaMinutes/(60 * 24 * 30));
        return [self stringFromFormat:@"%%d %@months ago" withValue:minutes];
    }
    else if (deltaMinutes < (24 * 60 * 731))
    {
        return NSDateTimeAgoLocalizedStrings(@"Last year");
    }
    
    minutes = (int)floor(deltaMinutes/(60 * 24 * 365));
    return [self stringFromFormat:@"%%d %@years ago" withValue:minutes];
}