senaite.core.api.dtime.get_os_timezone() - Code Metrics - Inspection of "Added date and time field/widget for Dexterity con..." - senaite/senaite.core - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — 2.x (#1903)

by Ramon

created 2021-12-31 09:12 UTC

senaite.core.api.dtime.get_os_timezone() B

↳ Parent: senaite.core.api.dtime

Complexity

Conditions

Size

Total Lines	24
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	15
dl	0
loc	24
rs	8.6666
c	0
b	0
f	0
cc	6
nop	0

# -*- coding: utf-8 -*-

import os
import time
from datetime import date
from datetime import datetime
from time import tzname

import pytz
from bika.lims import logger
from DateTime import DateTime


def is_d(dt):
    """Check if the date is a Python `date` object

    :param dt: date to check
    :returns: True when the date is a Python `date`
    """
    return isinstance(dt, date)


def is_dt(dt):
    """Check if the date is a Python `datetime` object

    :param dt: date to check
    :returns: True when the date is a Python `datetime`
    """
    return isinstance(dt, datetime)


def is_DT(dt):
    """Check if the date is a Zope `DateTime` object

    :param dt: object to check
    :returns: True when the object is a Zope `DateTime`
    """
    return isinstance(dt, DateTime)


def is_date(dt):
    """Check if the date is a datetime or DateTime object

    :param dt: date to check
    :returns: True when the object is either a datetime or DateTime
    """
    if is_dt(dt):
        return True
    if is_DT(dt):
        return True
    return False


def is_timezone_naive(dt):
    """Check if the date is timezone naive

    :param dt: date to check
    :returns: True when the date has no timezone
    """
    if is_DT(dt):
        return dt.timezoneNaive()
    elif is_dt(dt):
        return dt.tzinfo is None
    raise TypeError("Expected a date, got '%r'" % type(dt))


def is_timezone_aware(dt):
    """Check if the date is timezone aware

    :param dt: date to check
    :returns: True when the date has a timezone
    """
    return not is_timezone_naive(dt)


def to_DT(dt):
    """Convert to DateTime

    :param dt: DateTime/datetime/date
    :returns: DateTime object
    """
    if is_DT(dt):
        return dt
    elif is_dt(dt):
        return DateTime(dt.isoformat())
    elif is_d(dt):
        dt = datetime(dt.year, dt.month, dt.day)
        return DateTime(dt.isoformat())
    raise TypeError("Expected datetime, got '%r'" % type(dt))


def to_dt(dt):
    """Convert to datetime

    :param dt: DateTime/datetime/date
    :returns: datetime object
    """
    if is_DT(dt):
        return dt.asdatetime()
    elif is_dt(dt):
        return dt
    elif is_d(dt):
        return datetime(dt.year, dt.month, dt.day)
    raise TypeError("Expected DateTime, got '%r'" % type(dt))


def is_valid_timezone(timezone):
    """Checks if the timezone is a valid pytz/Olson name

    :param timezone: pytz/Olson timezone name
    :returns: True when the timezone is a valid zone
    """
    try:
        pytz.timezone(timezone)
        return True
    except pytz.UnknownTimeZoneError:
        return False


def get_os_timezone():
    """Return the default timezone of the system

    :returns: OS timezone or UTC
    """
    fallback = "UTC"
    timezone = None
    if "TZ" in os.environ.keys():
        # Timezone from OS env var
        timezone = os.environ["TZ"]
    if not timezone:
        # Timezone from python time
        zones = tzname
        if zones and len(zones) > 0:
            timezone = zones[0]
        else:
            # Default fallback = UTC
            logger.warn(
                "Operating system\'s timezone cannot be found. "
                "Falling back to UTC.")
            timezone = fallback
    if not is_valid_timezone(timezone):
        return fallback
    return timezone


def to_zone(dt, timezone):
    """Convert date to timezone

    Adds the timezone for timezone naive datetimes

    :param dt: date object
    :param timezone: timezone
    :returns: date converted to timezone
    """
    if is_dt(dt):
        zone = pytz.timezone(timezone)
        if is_timezone_aware(dt):
            return dt.astimezone(zone)
        return zone.localize(dt)
    if is_DT(dt):
        # NOTE: This shifts the time according to the TZ offset
        return dt.toZone(timezone)


def to_timestamp(dt):
    """Generate a Portable Operating System Interface (POSIX) timestamp

    :param dt: date object
    :returns: timestamp in seconds
    """
    timestamp = 0
    if is_DT(dt):
        timestamp = dt.timeTime()
    elif is_dt(dt):
        timestamp = time.mktime(dt.timetuple())
    return timestamp


def from_timestamp(timestamp):
    """Generate a datetime object from a POSIX timestamp

    :param timestamp: POSIX timestamp
    :returns: datetime object
    """

    return datetime.utcfromtimestamp(timestamp)


1			# -- coding: utf-8 --
2
3			import os
4			import time
5			from datetime import date
6			from datetime import datetime
7			from time import tzname
8
9			import pytz
10			from bika.lims import logger
11			from DateTime import DateTime
12
13
14			def is_d(dt):
15			"""Check if the date is a Python `date` object
16
17			:param dt: date to check
18			:returns: True when the date is a Python `date`
19			"""
20			return isinstance(dt, date)
21
22
23			def is_dt(dt):
24			"""Check if the date is a Python `datetime` object
25
26			:param dt: date to check
27			:returns: True when the date is a Python `datetime`
28			"""
29			return isinstance(dt, datetime)
30
31
32			def is_DT(dt):
33			"""Check if the date is a Zope `DateTime` object
34
35			:param dt: object to check
36			:returns: True when the object is a Zope `DateTime`
37			"""
38			return isinstance(dt, DateTime)
39
40
41			def is_date(dt):
42			"""Check if the date is a datetime or DateTime object
43
44			:param dt: date to check
45			:returns: True when the object is either a datetime or DateTime
46			"""
47			if is_dt(dt):
48			return True
49			if is_DT(dt):
50			return True
51			return False
52
53
54			def is_timezone_naive(dt):
55			"""Check if the date is timezone naive
56
57			:param dt: date to check
58			:returns: True when the date has no timezone
59			"""
60			if is_DT(dt):
61			return dt.timezoneNaive()
62			elif is_dt(dt):
63			return dt.tzinfo is None
64			raise TypeError("Expected a date, got '%r'" % type(dt))
65
66
67			def is_timezone_aware(dt):
68			"""Check if the date is timezone aware
69
70			:param dt: date to check
71			:returns: True when the date has a timezone
72			"""
73			return not is_timezone_naive(dt)
74
75
76			def to_DT(dt):
77			"""Convert to DateTime
78
79			:param dt: DateTime/datetime/date
80			:returns: DateTime object
81			"""
82			if is_DT(dt):
83			return dt
84			elif is_dt(dt):
85			return DateTime(dt.isoformat())
86			elif is_d(dt):
87			dt = datetime(dt.year, dt.month, dt.day)
88			return DateTime(dt.isoformat())
89			raise TypeError("Expected datetime, got '%r'" % type(dt))
90
91
92			def to_dt(dt):
93			"""Convert to datetime
94
95			:param dt: DateTime/datetime/date
96			:returns: datetime object
97			"""
98			if is_DT(dt):
99			return dt.asdatetime()
100			elif is_dt(dt):
101			return dt
102			elif is_d(dt):
103			return datetime(dt.year, dt.month, dt.day)
104			raise TypeError("Expected DateTime, got '%r'" % type(dt))
105
106
107			def is_valid_timezone(timezone):
108			"""Checks if the timezone is a valid pytz/Olson name
109
110			:param timezone: pytz/Olson timezone name
111			:returns: True when the timezone is a valid zone
112			"""
113			try:
114			pytz.timezone(timezone)
115			return True
116			except pytz.UnknownTimeZoneError:
117			return False
118
119
120			def get_os_timezone():
121			"""Return the default timezone of the system
122
123			:returns: OS timezone or UTC
124			"""
125			fallback = "UTC"
126			timezone = None
127			if "TZ" in os.environ.keys():
128			# Timezone from OS env var
129			timezone = os.environ["TZ"]
130			if not timezone:
131			# Timezone from python time
132			zones = tzname
133			if zones and len(zones) > 0:
134			timezone = zones[0]
135			else:
136			# Default fallback = UTC
137			logger.warn(
138			"Operating system\'s timezone cannot be found. "
139			"Falling back to UTC.")
140			timezone = fallback
141			if not is_valid_timezone(timezone):
142			return fallback
143			return timezone
144
145
146			def to_zone(dt, timezone):
147			"""Convert date to timezone
148
149			Adds the timezone for timezone naive datetimes
150
151			:param dt: date object
152			:param timezone: timezone
153			:returns: date converted to timezone
154			"""
155			if is_dt(dt):
156			zone = pytz.timezone(timezone)
157			if is_timezone_aware(dt):
158			return dt.astimezone(zone)
159			return zone.localize(dt)
160			if is_DT(dt):
161			# NOTE: This shifts the time according to the TZ offset
162			return dt.toZone(timezone)
163
164
165			def to_timestamp(dt):
166			"""Generate a Portable Operating System Interface (POSIX) timestamp
167
168			:param dt: date object
169			:returns: timestamp in seconds
170			"""
171			timestamp = 0
172			if is_DT(dt):
173			timestamp = dt.timeTime()
174			elif is_dt(dt):
175			timestamp = time.mktime(dt.timetuple())
176			return timestamp
177
178
179			def from_timestamp(timestamp):
180			"""Generate a datetime object from a POSIX timestamp
181
182			:param timestamp: POSIX timestamp
183			:returns: datetime object
184			"""
185
186			return datetime.utcfromtimestamp(timestamp)
187

senaite / senaite.core

Pull Request — 2.x (#1903)

senaite.core.api.dtime.get_os_timezone() B

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