git.r.bdr.sh - rbdr/mobius/blob - hotline/time.go

   1 package hotline
   2
   3 import (
   4         "encoding/binary"
   5         "time"
   6 )
   7
   8 // toHotlineTime converts a time.Time to the 8 byte Hotline time format:
   9 // Year (2 bytes), milliseconds (2 bytes) and seconds (4 bytes)
  10 func toHotlineTime(t time.Time) (b []byte) {
  11         yearBytes := make([]byte, 2)
  12         secondBytes := make([]byte, 4)
  13
  14         // Get a time.Time for January 1st 00:00 from t so we can calculate the difference in seconds from t
  15         startOfYear := time.Date(t.Year(), time.January, 1, 0, 0, 0, 0, time.Local)
  16
  17         binary.BigEndian.PutUint16(yearBytes, uint16(t.Year()))
  18         binary.BigEndian.PutUint32(secondBytes, uint32(t.Sub(startOfYear).Seconds()))
  19
  20         b = append(b, yearBytes...)
  21         b = append(b, []byte{0, 0}...)
  22         b = append(b, secondBytes...)
  23
  24         return b
  25 }