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# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2009-2020 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'date'
module BSON
# Julian day of Date 1970-01-01 - UNIX timestamp reference.
#
# @api private
DATE_REFERENCE = ::Date.new(1970, 1, 1).jd
# Number of miliseconds in a day.
#
# @api private
MILLISECONDS_IN_DAY = 60 * 60 * 24 * 1_000
# Injects behaviour for encoding date values to raw bytes as specified by
# the BSON spec for time.
#
# @see http://bsonspec.org/#/specification
#
# @since 2.1.0
module Date
# Get the date as encoded BSON.
#
# @example Get the date as encoded BSON.
# Date.new(2012, 1, 1).to_bson
#
# @return [ BSON::ByteBuffer ] The buffer with the encoded object.
#
# @see http://bsonspec.org/#/specification
#
# @since 2.1.0
def to_bson(buffer = ByteBuffer.new)
buffer.put_int64((jd - DATE_REFERENCE) * MILLISECONDS_IN_DAY)
end
# Get the BSON type for the date.
#
# As the date is converted to a time, this returns the BSON type for time.
def bson_type
::Time::BSON_TYPE
end
end
# Enrich the core Date class with this module.
#
# @since 2.1.0
::Date.send(:include, Date)
end
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