session-ios/Signal/src/util/DateUtil.m

#import "DateUtil.h"
#import "Environment.h"
#import "PreferencesUtil.h"

#define ONE_DAY_TIME_INTERVAL (double)60*60*24
#define ONE_WEEK_TIME_INTERVAL (double)60*60*24*7

static NSString *const DATE_FORMAT_WEEKDAY = @"EEEE";
static NSString *const DATE_FORMAT_HOUR_MINUTE = @"h:mm a   ";

@implementation DateUtil

+ (NSDateFormatter *)dateFormatter {
    NSDateFormatter *formatter = [NSDateFormatter new];
    [formatter setDateStyle:NSDateFormatterShortStyle];
    return formatter;
}

+ (NSDateFormatter *)weekdayFormatter {
    NSDateFormatter *formatter = [NSDateFormatter new];
    [formatter setDateFormat:DATE_FORMAT_WEEKDAY];
    return formatter;
}

+ (NSDateFormatter *)timeFormatter {
    NSDateFormatter *formatter = [NSDateFormatter new];
    [formatter setDateFormat:DATE_FORMAT_HOUR_MINUTE];
    return formatter;
}

+ (BOOL)dateIsOlderThanOneDay:(NSDate *)date {
    return [[NSDate date] timeIntervalSinceDate:date] > ONE_DAY_TIME_INTERVAL;
}

+ (BOOL)dateIsOlderThanOneWeek:(NSDate *)date {
    return [[NSDate date] timeIntervalSinceDate:date] > ONE_WEEK_TIME_INTERVAL;
}

@end