#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2021, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
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""" Provide date and time related properties
"""
#-----------------------------------------------------------------------------
# Boilerplate
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from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
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# Imports
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# Standard library imports
import datetime
# Bokeh imports
from ...util.serialization import convert_date_to_datetime, is_datetime_type, is_timedelta_type
from .bases import Property
from .primitive import bokeh_integer_types
from .singletons import Undefined
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# Globals and constants
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__all__ = (
'Date',
'Datetime',
'TimeDelta',
)
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# General API
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[docs]class Date(Property):
""" Accept ISO format Date (but not DateTime) values.
"""
def transform(self, value):
value = super().transform(value)
if isinstance(value, datetime.date):
value = value.isoformat()
return value
def validate(self, value, detail=True):
super().validate(value, detail)
# datetime.datetime is datetime.date, exclude manually up front
if isinstance(value, datetime.datetime):
msg = "" if not detail else "Expected a date value, got a datetime.datetime"
raise ValueError(msg)
if isinstance(value, datetime.date):
return
try:
datetime.datetime.fromisoformat(value)
except Exception:
msg = "" if not detail else f"Expected an ISO date string, got {value!r}"
raise ValueError(msg)
[docs]class Datetime(Property):
""" Accept ISO format Datetime values.
"""
def __init__(self, default=Undefined, help=None) -> None:
super().__init__(default=default, help=help)
def transform(self, value):
value = super().transform(value)
if isinstance(value, str):
value = datetime.datetime.fromisoformat(value)
# Handled by serialization in protocol.py for now, except for Date
if isinstance(value, datetime.date):
value = convert_date_to_datetime(value)
return value
def validate(self, value, detail=True):
super().validate(value, detail)
if is_datetime_type(value):
return
if isinstance(value, datetime.date):
return
if Datetime.is_timestamp(value):
return
if isinstance(value, str):
try:
datetime.datetime.fromisoformat(value).date()
return
except Exception:
pass
msg = "" if not detail else f"Expected a date, datetime object, or timestamp, got {value!r}"
raise ValueError(msg)
def serialize_value(self, value):
""" Change the value into a JSON serializable format.
"""
if isinstance(value, datetime.date):
value = convert_date_to_datetime(value)
return value
@staticmethod
def is_timestamp(value):
return isinstance(value, (float,) + bokeh_integer_types) and not isinstance(value, bool)
[docs]class TimeDelta(Property):
""" Accept TimeDelta values.
"""
def __init__(self, default=datetime.timedelta(), help=None) -> None:
super().__init__(default=default, help=help)
def transform(self, value):
value = super().transform(value)
return value
# Handled by serialization in protocol.py for now
def validate(self, value, detail=True):
super().validate(value, detail)
if is_timedelta_type(value):
return
msg = "" if not detail else f"Expected a timedelta instance, got {value!r}"
raise ValueError(msg)
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# Dev API
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# Private API
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# Code
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