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26 changes: 22 additions & 4 deletions src/undate/converters/calendars/hebrew/converter.py
Original file line number Diff line number Diff line change
Expand Up @@ -28,9 +28,13 @@
"""Smallest numeric month for this calendar."""
return 1

def max_month(self, year: int) -> int:
def max_month(self, year: int = None) -> int: # Added default None for year
"""Maximum numeric month for this calendar. In Hebrew calendar, this is 12 or 13
depending on whether it is a leap year."""
depending on whether it is a leap year.
If year is None, defaults to 12 (non-leap year)."""
if year is None:
# Default to a non-leap year's number of months if year is not specified
return 12
return hebrew.year_months(year)

def first_month(self) -> int:
Expand All @@ -42,10 +46,24 @@
Elul is the month before Tishri."""
return hebrew.ELUL

def max_day(self, year: int, month: int) -> int:
def max_day(self, year: int = None, month: int = None) -> int: # Added default None
"""maximum numeric day for the specified year and month in this calendar"""
# NOTE: unreleased v2.4.1 of convertdate standardizes month_days to month_length
return hebrew.month_days(year, month)

# Handle None year/month by defaulting to a common non-leap scenario
# Default year to a known non-leap year if None, e.g. 5783
# Default month to Nisan (1) if None, as it's the first biblical month and always has 30 days.
effective_year = year if year is not None else 5783 # 5783 is a non-leap year
effective_month = month if month is not None else hebrew.NISAN # Nisan is 1

# Ensure year is not None for leap check if month is Adar related and year was originally None
if year is None and (effective_month == 12 or effective_month == 13): # Adar, Adar I or Adar II
# hebrew.month_days needs a concrete year to determine leap month lengths correctly.
# We've defaulted to 5783 (non-leap).
pass

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return hebrew.month_days(effective_year, effective_month)

def to_gregorian(self, year: int, month: int, day: int) -> tuple[int, int, int]:
"""Convert a Hebrew date, specified by year, month, and day,
Expand Down
12 changes: 9 additions & 3 deletions src/undate/converters/calendars/islamic/converter.py
Original file line number Diff line number Diff line change
Expand Up @@ -24,9 +24,15 @@ class IslamicDateConverter(BaseCalendarConverter):
def __init__(self):
self.transformer = IslamicDateTransformer()

def max_day(self, year: int, month: int) -> int:
"""maximum numeric day for the specified year and month in this calendar"""
return islamic.month_length(year, month)
def max_day(self, year: int = None, month: int = None) -> int: # Added default None
"""maximum numeric day for the specified year and month in this calendar.
If year or month is None, defaults will be used (non-leap year, month 1)."""
# Default year to a known non-leap year if None (e.g., 1446 AH)
effective_year = year if year is not None else 1446
# Default month to 1 (Muharram) if None
effective_month = month if month is not None else 1

return islamic.month_length(effective_year, effective_month)

def min_month(self) -> int:
"""smallest numeric month for this calendar."""
Expand Down
52 changes: 52 additions & 0 deletions src/undate/converters/calendars/seleucid.py
Original file line number Diff line number Diff line change
@@ -1,5 +1,11 @@
from typing import Union # Added for type hints
from lark.exceptions import UnexpectedCharacters # Added for specific exception
from undate import Undate, UndateInterval # Added for type hints

from undate.converters.calendars import HebrewDateConverter
from undate.undate import Calendar
# Moved hebrew_parser import to top level for use in parse method
from undate.converters.calendars.hebrew.parser import hebrew_parser


class SeleucidDateConverter(HebrewDateConverter):
Expand All @@ -15,10 +21,56 @@ def __init__(self):
# override hebrew calendar to initialize undates with seleucid
# calendar; this triggers Seleucid calendar to_gregorian method use
self.transformer.calendar = Calendar.SELEUCID
# The parser is inherited from HebrewDateConverter. If Seleucid has a distinct
# string format that hebrew_parser can't handle, a seleucid_parser would be needed.
# For now, assume string format compatibility for parsing, error message is the primary fix.
# Ensure transformer is correctly set up from parent and then modified
super().__init__() # Call parent __init__ first
self.transformer.calendar = Calendar.SELEUCID


def max_month(self, year: int = None) -> int:
"""Maximum numeric month for this calendar. Adjusted for Seleucid year."""
if year is not None:
am_year = year + self.SELEUCID_OFFSET
else:
am_year = None # Let parent handle None AM year if applicable (it defaults to non-leap)
return super().max_month(am_year)

def max_day(self, year: int = None, month: int = None) -> int:
"""Maximum numeric day for the specified year and month. Adjusted for Seleucid year."""
if year is not None:
am_year = year + self.SELEUCID_OFFSET
else:
am_year = None # Parent's max_day handles None year by defaulting

# Parent's max_day handles None month by defaulting, so pass month as is.
return super().max_day(am_year, month)

def to_gregorian(self, year: int, month: int, day: int) -> tuple[int, int, int]:
"""Convert a Seleucid date, specified by year, month, and day,
to the Gregorian equivalent date. Uses hebrew calendar conversion
logic with :attr:`SELEUCID_OFFSET`. Returns a tuple of year, month, day.
"""
return super().to_gregorian(year + self.SELEUCID_OFFSET, month, day)

def parse(self, value: str) -> Union[Undate, UndateInterval]:
"""
Parse a Seleucid date string and return an :class:`~undate.undate.Undate` or
:class:`~undate.undate.UndateInterval`.
The Seleucid date string is preserved in the undate label.
Uses Hebrew parser logic with Seleucid calendar context.
"""
if not value:
raise ValueError("Parsing empty string is not supported")

try:
# Uses the hebrew_parser (imported at module level)
# and self.transformer (calendar set to SELEUCID in __init__)
parsetree = hebrew_parser.parse(value)
undate_obj = self.transformer.transform(parsetree)
undate_obj.label = f"{value} {self.calendar_name}"
return undate_obj
except UnexpectedCharacters as err:
# Catch specific parsing error and raise with custom message
raise ValueError(f"Could not parse '{value}' as a Seleucid date") from err
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