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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
"""The networking part of the python-broadlink library."""
import datetime as dt
import time
class Datetime:
"""Helps to pack and unpack datetime objects for the Broadlink protocol."""
@staticmethod
def pack(datetime: dt.datetime) -> bytes:
"""Pack the timestamp to be sent over the Broadlink protocol."""
data = bytearray(12)
utcoffset = int(datetime.utcoffset().total_seconds() / 3600)
data[:0x04] = utcoffset.to_bytes(4, "little", signed=True)
data[0x04:0x06] = datetime.year.to_bytes(2, "little")
data[0x06] = datetime.minute
data[0x07] = datetime.hour
data[0x08] = int(datetime.strftime("%y"))
data[0x09] = datetime.isoweekday()
data[0x0A] = datetime.day
data[0x0B] = datetime.month
return data
@staticmethod
def unpack(data: bytes) -> dt.datetime:
"""Unpack a timestamp received over the Broadlink protocol."""
utcoffset = int.from_bytes(data[0x00:0x04], "little", signed=True)
year = int.from_bytes(data[0x04:0x06], "little")
minute = data[0x06]
hour = data[0x07]
subyear = data[0x08]
isoweekday = data[0x09]
day = data[0x0A]
month = data[0x0B]
tz_info = dt.timezone(dt.timedelta(hours=utcoffset))
datetime = dt.datetime(year, month, day, hour, minute, 0, 0, tz_info)
if datetime.isoweekday() != isoweekday:
raise ValueError("isoweekday does not match")
if int(datetime.strftime("%y")) != subyear:
raise ValueError("subyear does not match")
return datetime
@staticmethod
def now() -> dt.datetime:
"""Return the current date and time with timezone info."""
tz_info = dt.timezone(dt.timedelta(seconds=-time.timezone))
return dt.datetime.now(tz_info)
|
