All files / random date-day.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
2x
 
2x
2x
 
 
 
 
2x
8x
8x
 
8x
 
8x
 
 
2x
8x
 
 
 
 
 
 
 
2x
 
3x
 
3x
 
 
 
import { isLeapYear } from '../assert/is-leap-year';
 
import { randomMonth } from './date-month';
import { randomNumber } from './number';
 
/**
 * Returns a random day for a month. 1=january, etc.
 */
export function randomDay(month?: number, year?: number): number {
  const currentMonth = month ? month : randomMonth();
  const leapYear = !!year && isLeapYear(year);
 
  const maxDay = calculateMaxDayForMonth(currentMonth, leapYear);
 
  return randomNumber(1, maxDay);
}
 
export function calculateMaxDayForMonth(month: number, isLeapYear: boolean): number {
  switch (month) {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:
      return 31;
    case 2:
      return isLeapYear ? 29 : 28;
    default:
      return 30;
  }
}