Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/aniso8601/timezone.py: 97%

1# -*- coding: utf-8 -*- 

2 

3# Copyright (c) 2021, Brandon Nielsen 

4# All rights reserved. 

5# 

6# This software may be modified and distributed under the terms 

7# of the BSD license. See the LICENSE file for details. 

8 

9from aniso8601.builders.python import PythonTimeBuilder 

10from aniso8601.compat import is_string 

11from aniso8601.exceptions import ISOFormatError 

12 

13 

14def parse_timezone(tzstr, builder=PythonTimeBuilder): 

15 # tzstr can be Z, ±hh:mm, ±hhmm, ±hh 

16 if is_string(tzstr) is False: 

17 raise ValueError("Time zone must be string.") 

18 

19 if len(tzstr) == 1 and tzstr[0] == "Z": 

20 return builder.build_timezone(negative=False, Z=True, name=tzstr) 

21 elif len(tzstr) == 6: 

22 # ±hh:mm 

23 hourstr = tzstr[1:3] 

24 minutestr = tzstr[4:6] 

25 

26 if tzstr[0] == "-" and hourstr == "00" and minutestr == "00": 

27 raise ISOFormatError("Negative ISO 8601 time offset must not " "be 0.") 

28 elif len(tzstr) == 5: 

29 # ±hhmm 

30 hourstr = tzstr[1:3] 

31 minutestr = tzstr[3:5] 

32 

33 if tzstr[0] == "-" and hourstr == "00" and minutestr == "00": 

34 raise ISOFormatError("Negative ISO 8601 time offset must not " "be 0.") 

35 elif len(tzstr) == 3: 

36 # ±hh 

37 hourstr = tzstr[1:3] 

38 minutestr = None 

39 

40 if tzstr[0] == "-" and hourstr == "00": 

41 raise ISOFormatError("Negative ISO 8601 time offset must not " "be 0.") 

42 else: 

43 raise ISOFormatError('"{0}" is not a valid ISO 8601 time offset.'.format(tzstr)) 

44 

45 for componentstr in [hourstr, minutestr]: 

46 if componentstr is not None: 

47 if componentstr.isdigit() is False: 

48 raise ISOFormatError( 

49 '"{0}" is not a valid ISO 8601 time offset.'.format(tzstr) 

50 ) 

51 

52 if tzstr[0] == "+": 

53 return builder.build_timezone( 

54 negative=False, hh=hourstr, mm=minutestr, name=tzstr 

55 ) 

56 

57 if tzstr[0] == "-": 

58 return builder.build_timezone( 

59 negative=True, hh=hourstr, mm=minutestr, name=tzstr 

60 ) 

61 

62 raise ISOFormatError('"{0}" is not a valid ISO 8601 time offset.'.format(tzstr))