chore: better legacy support

src/netius/base/legacy.py

@@ -40,6 +40,8 @@
 import os
 import sys
 import inspect
+import calendar
+import datetime
 import functools
 import itertools
 import contextlib
@@ -116,6 +118,10 @@ def ctx_absolute():
 interpreter is at least Python 3 compliant, this is used
 to take some of the conversion decision for runtime """
 
+PYTHON_33 = sys.version_info[0] >= 3 and sys.version_info[1] >= 3
+""" Global variable that defines if the current Python
+interpreter is at least Python 3.3 compliant """
+
 PYTHON_35 = sys.version_info[0] >= 3 and sys.version_info[1] >= 5
 """ Global variable that defines if the current Python
 interpreter is at least Python 3.5 compliant """
@@ -378,6 +384,29 @@ def build_opener(*args, **kwargs):
     if PYTHON_3: return urllib.request.build_opener(*args, **kwargs)
     else: return urllib2.build_opener(*args, **kwargs) #@UndefinedVariable
 
+def to_timestamp(date_time):
+    if PYTHON_33:
+        return date_time.replace(tzinfo=datetime.timezone.utc).timestamp()
+    else:
+        return calendar.timegm(date_time.utctimetuple())
+
+def to_datetime(timestamp):
+    if PYTHON_33:
+        return datetime.datetime.fromtimestamp(
+            timestamp, datetime.timezone.utc
+        ).replace(tzinfo=None)
+    else:
+        return datetime.datetime.utcfromtimestamp(timestamp)
+
+def utcfromtimestamp(timestamp):
+    return to_datetime(timestamp)
+
+def utc_now():
+    if PYTHON_33:
+        return datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
+    else:
+        return datetime.datetime.utcnow()
+
 def urlparse(*args, **kwargs):
     return _urlparse.urlparse(*args, **kwargs)