|
1
|
|
|
# -*- coding: utf-8 -*- |
|
2
|
|
|
|
|
3
|
|
|
import os |
|
4
|
|
|
from datetime import date |
|
5
|
|
|
from datetime import datetime |
|
6
|
|
|
from time import tzname |
|
7
|
|
|
|
|
8
|
|
|
import pytz |
|
9
|
|
|
from bika.lims import logger |
|
10
|
|
|
from DateTime import DateTime |
|
11
|
|
|
|
|
12
|
|
|
|
|
13
|
|
|
def is_d(dt): |
|
14
|
|
|
"""Check if the date is a Python `date` object |
|
15
|
|
|
|
|
16
|
|
|
:param dt: date to check |
|
17
|
|
|
:returns: True when the date is a Python `date` |
|
18
|
|
|
""" |
|
19
|
|
|
return isinstance(dt, date) |
|
20
|
|
|
|
|
21
|
|
|
|
|
22
|
|
|
def is_dt(dt): |
|
23
|
|
|
"""Check if the date is a Python `datetime` object |
|
24
|
|
|
|
|
25
|
|
|
:param dt: date to check |
|
26
|
|
|
:returns: True when the date is a Python `datetime` |
|
27
|
|
|
""" |
|
28
|
|
|
return isinstance(dt, datetime) |
|
29
|
|
|
|
|
30
|
|
|
|
|
31
|
|
|
def is_DT(dt): |
|
32
|
|
|
"""Check if the date is a Zope `DateTime` object |
|
33
|
|
|
|
|
34
|
|
|
:param dt: object to check |
|
35
|
|
|
:returns: True when the object is a Zope `DateTime` |
|
36
|
|
|
""" |
|
37
|
|
|
return isinstance(dt, DateTime) |
|
38
|
|
|
|
|
39
|
|
|
|
|
40
|
|
|
def is_date(dt): |
|
41
|
|
|
"""Check if the date is a datetime or DateTime object |
|
42
|
|
|
|
|
43
|
|
|
:param dt: date to check |
|
44
|
|
|
:returns: True when the object is either a datetime or DateTime |
|
45
|
|
|
""" |
|
46
|
|
|
if is_dt(dt): |
|
47
|
|
|
return True |
|
48
|
|
|
if is_DT(dt): |
|
49
|
|
|
return True |
|
50
|
|
|
return False |
|
51
|
|
|
|
|
52
|
|
|
|
|
53
|
|
|
def is_timezone_naive(dt): |
|
54
|
|
|
"""Check if the date is timezone naive |
|
55
|
|
|
|
|
56
|
|
|
:param dt: date to check |
|
57
|
|
|
:returns: True when the date has no timezone |
|
58
|
|
|
""" |
|
59
|
|
|
if is_DT(dt): |
|
60
|
|
|
return dt.timezoneNaive() |
|
61
|
|
|
elif is_dt(dt): |
|
62
|
|
|
return dt.tzinfo is None |
|
63
|
|
|
raise TypeError("Expected a date, got '%r'" % type(dt)) |
|
64
|
|
|
|
|
65
|
|
|
|
|
66
|
|
|
def is_timezone_aware(dt): |
|
67
|
|
|
"""Check if the date is timezone aware |
|
68
|
|
|
|
|
69
|
|
|
:param dt: date to check |
|
70
|
|
|
:returns: True when the date has a timezone |
|
71
|
|
|
""" |
|
72
|
|
|
return not is_timezone_naive(dt) |
|
73
|
|
|
|
|
74
|
|
|
|
|
75
|
|
|
def to_DT(dt): |
|
76
|
|
|
"""Convert to DateTime |
|
77
|
|
|
|
|
78
|
|
|
:param dt: DateTime/datetime/date |
|
79
|
|
|
:returns: DateTime object |
|
80
|
|
|
""" |
|
81
|
|
|
if is_DT(dt): |
|
82
|
|
|
return dt |
|
83
|
|
|
elif is_dt(dt): |
|
84
|
|
|
return DateTime(dt.isoformat()) |
|
85
|
|
|
elif is_d(dt): |
|
86
|
|
|
dt = datetime(dt.year, dt.month, dt.day) |
|
87
|
|
|
return DateTime(dt.isoformat()) |
|
88
|
|
|
raise TypeError("Expected datetime, got '%r'" % type(dt)) |
|
89
|
|
|
|
|
90
|
|
|
|
|
91
|
|
|
def to_dt(dt): |
|
92
|
|
|
"""Convert to datetime |
|
93
|
|
|
|
|
94
|
|
|
:param dt: DateTime/datetime/date |
|
95
|
|
|
:returns: datetime object |
|
96
|
|
|
""" |
|
97
|
|
|
if is_DT(dt): |
|
98
|
|
|
return dt.asdatetime() |
|
99
|
|
|
elif is_dt(dt): |
|
100
|
|
|
return dt |
|
101
|
|
|
elif is_d(dt): |
|
102
|
|
|
return datetime(dt.year, dt.month, dt.day) |
|
103
|
|
|
raise TypeError("Expected DateTime, got '%r'" % type(dt)) |
|
104
|
|
|
|
|
105
|
|
|
|
|
106
|
|
|
def is_valid_timezone(timezone): |
|
107
|
|
|
"""Checks if the timezone is a valid pytz/Olson name |
|
108
|
|
|
|
|
109
|
|
|
:param timezone: pytz/Olson timezone name |
|
110
|
|
|
:returns: True when the timezone is a valid zone |
|
111
|
|
|
""" |
|
112
|
|
|
try: |
|
113
|
|
|
pytz.timezone(timezone) |
|
114
|
|
|
return True |
|
115
|
|
|
except pytz.UnknownTimeZoneError: |
|
116
|
|
|
return False |
|
117
|
|
|
|
|
118
|
|
|
|
|
119
|
|
|
def get_os_timezone(): |
|
120
|
|
|
"""Return the default timezone of the system |
|
121
|
|
|
|
|
122
|
|
|
:returns: OS timezone or UTC |
|
123
|
|
|
""" |
|
124
|
|
|
fallback = "UTC" |
|
125
|
|
|
timezone = None |
|
126
|
|
|
if "TZ" in os.environ.keys(): |
|
127
|
|
|
# Timezone from OS env var |
|
128
|
|
|
timezone = os.environ["TZ"] |
|
129
|
|
|
if not timezone: |
|
130
|
|
|
# Timezone from python time |
|
131
|
|
|
zones = tzname |
|
132
|
|
|
if zones and len(zones) > 0: |
|
133
|
|
|
timezone = zones[0] |
|
134
|
|
|
else: |
|
135
|
|
|
# Default fallback = UTC |
|
136
|
|
|
logger.warn( |
|
137
|
|
|
"Operating system\'s timezone cannot be found. " |
|
138
|
|
|
"Falling back to UTC.") |
|
139
|
|
|
timezone = fallback |
|
140
|
|
|
if not is_valid_timezone(timezone): |
|
141
|
|
|
return fallback |
|
142
|
|
|
return timezone |
|
143
|
|
|
|
|
144
|
|
|
|
|
145
|
|
|
def to_zone(dt, timezone): |
|
146
|
|
|
"""Convert date to timezone |
|
147
|
|
|
|
|
148
|
|
|
Adds the timezone for timezone naive datetimes |
|
149
|
|
|
|
|
150
|
|
|
:param dt: date object |
|
151
|
|
|
:param timezone: timezone |
|
152
|
|
|
:returns: date converted to timezone |
|
153
|
|
|
""" |
|
154
|
|
|
if is_dt(dt): |
|
155
|
|
|
zone = pytz.timezone(timezone) |
|
156
|
|
|
if is_timezone_aware(dt): |
|
157
|
|
|
return dt.astimezone(zone) |
|
158
|
|
|
return zone.localize(dt) |
|
159
|
|
|
if is_DT(dt): |
|
160
|
|
|
# NOTE: This shifts the time according to the TZ offset |
|
161
|
|
|
return dt.toZone(timezone) |
|
162
|
|
|
|
senaite /
senaite.core
