Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/aniso8601/timezone.py: 12%

1# -*- coding: utf-8 -*- 

2 

3# Copyright (c) 2025, 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 

22 if len(tzstr) == 6: 

23 # ±hh:mm 

24 hourstr = tzstr[1:3] 

25 minutestr = tzstr[4:6] 

26 

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

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

29 elif len(tzstr) == 5: 

30 # ±hhmm 

31 hourstr = tzstr[1:3] 

32 minutestr = tzstr[3:5] 

33 

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

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

36 elif len(tzstr) == 3: 

37 # ±hh 

38 hourstr = tzstr[1:3] 

39 minutestr = None 

40 

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

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

43 else: 

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

45 

46 for componentstr in [hourstr, minutestr]: 

47 if componentstr is not None: 

48 if componentstr.isdigit() is False: 

49 raise ISOFormatError( 

50 '"{0}" is not a valid ISO 8601 time offset.'.format(tzstr) 

51 ) 

52 

53 if tzstr[0] == "+": 

54 return builder.build_timezone( 

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

56 ) 

57 

58 if tzstr[0] == "-": 

59 return builder.build_timezone( 

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

61 ) 

62 

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