Andy Kopra
61b21d1397
@date/@datetime gain :lang (German: "16. Juni 1910") over a document-wide Language state variable, and :number for the numeric form (en 6/16/1910, de 16.06.1910 per DIN 5008). @eval finds Python modules next to the file that names them regardless of the cwd, and the new :cwd option runs an eval in a chosen working directory (@source_file uses it to resolve against the document). Two new test suites ship in tst/. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
77 lines
3.0 KiB
Python
77 lines
3.0 KiB
Python
# Implementation of the @date and @datetime klammers (date.k). Each takes
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# the current date and time, offset by the :days argument (positive is
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# future, negative is past), and formats it in the requested language.
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#
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# Language selection is two-level: the klammer's :lang argument overrides
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# the document-wide Language state variable (declared in sks/kutil/kutil.k,
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# default en; set it for a whole document with @@@state Language :value de).
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#
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# :number selects the purely numeric form instead — which is language-
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# specific in order, separator, and padding: en 5/15/1955 (month first,
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# unpadded), de 15.05.1955 (day first, zero-padded per DIN 5008).
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#
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# Languages are OWN TABLES, deliberately not locales: strftime's %B follows
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# the process-wide C locale, which must be generated on the host (the
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# containers ship minimal locale support) and is global mutable state in the
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# embedded interpreter — the same reason @table's :decimal is implemented by
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# character translation. Adding a language is adding one LANGUAGES entry:
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# twelve month names and the date pattern (day/month/year; the day carries
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# no leading zero). The time suffix ", HH:MM" is language-independent.
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import datetime as dt
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LANGUAGES = {
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'en': {
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'months': ['January', 'February', 'March', 'April', 'May', 'June',
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'July', 'August', 'September', 'October', 'November',
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'December'],
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'date': '{day} {month} {year}', # 16 June 1910
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'number': '{m}/{day}/{year}', # 6/16/1910
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},
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'de': {
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'months': ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni',
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'Juli', 'August', 'September', 'Oktober', 'November',
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'Dezember'],
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'date': '{day}. {month} {year}', # 16. Juni 1910
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'number': '{dd}.{mm}.{year}', # 16.06.1910 (DIN 5008)
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},
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}
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def offset(days):
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return dt.datetime.now() + dt.timedelta(days=days or 0)
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def language(K):
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"""The language table for K: :lang argument, else the Language state
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variable, else English. Returns (table, error_text)."""
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code = getattr(K, 'lang', '') or getattr(K, 'Language', '') or 'en'
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if code not in LANGUAGES:
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return None, ('ERROR: @date/@datetime: unknown language "%s" '
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'(available: %s)'
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% (code, ', '.join(sorted(LANGUAGES))))
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return LANGUAGES[code], None
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def format_date(t, lang, number=False):
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pattern = lang['number'] if number else lang['date']
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return pattern.format(day=t.day, m=t.month,
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dd='%02d' % t.day, mm='%02d' % t.month,
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month=lang['months'][t.month - 1],
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year=t.year)
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def date(K):
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lang, error = language(K)
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if error:
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return error
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return format_date(offset(K.days), lang, K.number)
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def datetime(K):
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lang, error = language(K)
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if error:
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return error
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t = offset(K.days)
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return format_date(t, lang, K.number) + ', %02d:%02d' % (t.hour, t.minute)
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