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721167a079
* Stop ignoring parsedatetime warning flag style warning * Use new VERSION_CONTEXT_STYLE to bypass parsedatetime flag style warning * Replace "flag" and its magic numbers with contextual booleans
103 lines
3.3 KiB
Python
103 lines
3.3 KiB
Python
# Copyright © 2012-2023 jrnl contributors
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# License: https://www.gnu.org/licenses/gpl-3.0.html
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import datetime
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FAKE_YEAR = 9999
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DEFAULT_FUTURE = datetime.datetime(FAKE_YEAR, 12, 31, 23, 59, 59)
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DEFAULT_PAST = datetime.datetime(FAKE_YEAR, 1, 1, 0, 0)
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def __get_pdt_calendar():
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import parsedatetime as pdt
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consts = pdt.Constants(usePyICU=False)
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consts.DOWParseStyle = -1 # "Monday" will be either today or the last Monday
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calendar = pdt.Calendar(consts, version=pdt.VERSION_CONTEXT_STYLE)
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return calendar
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def parse(
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date_str: str | datetime.datetime,
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inclusive: bool = False,
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default_hour: int | None = None,
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default_minute: int | None = None,
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bracketed: bool = False,
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) -> datetime.datetime | None:
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"""Parses a string containing a fuzzy date and returns a datetime.datetime object"""
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if not date_str:
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return None
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elif isinstance(date_str, datetime.datetime):
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return date_str
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# Don't try to parse anything with 6 or fewer characters and was parsed from the
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# existing journal. It's probably a markdown footnote
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if len(date_str) <= 6 and bracketed:
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return None
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default_date = DEFAULT_FUTURE if inclusive else DEFAULT_PAST
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date = None
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year_present = False
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hasTime = False
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hasDate = False
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while not date:
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try:
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from dateutil.parser import parse as dateparse
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date = dateparse(date_str, default=default_date)
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if date.year == FAKE_YEAR:
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date = datetime.datetime(
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datetime.datetime.now().year, date.timetuple()[1:6]
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)
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else:
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year_present = True
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hasTime = not (date.hour == date.minute == 0)
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hasDate = True
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date = date.timetuple()
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except Exception as e:
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if e.args[0] == "day is out of range for month":
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y, m, d, H, M, S = default_date.timetuple()[:6]
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default_date = datetime.datetime(y, m, d - 1, H, M, S)
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else:
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calendar = __get_pdt_calendar()
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date, parse_context = calendar.parse(date_str)
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hasTime = parse_context.hasTime
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hasDate = parse_context.hasDate
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if not hasDate and not hasTime:
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try: # Try and parse this as a single year
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year = int(date_str)
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return datetime.datetime(year, 1, 1)
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except ValueError:
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return None
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except TypeError:
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return None
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if hasDate and not hasTime:
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date = datetime.datetime( # Use the default time
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*date[:3],
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hour=23 if inclusive else default_hour or 0,
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minute=59 if inclusive else default_minute or 0,
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second=59 if inclusive else 0
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)
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else:
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date = datetime.datetime(*date[:6])
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# Ugly heuristic: if the date is more than 4 weeks in the future, we got the year
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# wrong. Rather than this, we would like to see parsedatetime patched so we can
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# tell it to prefer past dates
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dt = datetime.datetime.now() - date
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if dt.days < -28 and not year_present:
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date = date.replace(date.year - 1)
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return date
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def is_valid_date(year: int, month: int, day: int) -> bool:
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try:
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datetime.datetime(year, month, day)
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return True
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except ValueError:
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return False
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