#frozen_string_literal: false
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
require 'json'
end
require 'date'
class Date
# See #as_json.
def self.json_create(object)
civil(*object.values_at('y', 'm', 'd', 'sg'))
end
alias start sg unless method_defined?(:start)
# Methods <tt>Date#as_json</tt> and +Date.json_create+ may be used
# to serialize and deserialize a \Date object;
# see Marshal[rdoc-ref:Marshal].
#
# \Method <tt>Date#as_json</tt> serializes +self+,
# returning a 2-element hash representing +self+:
#
# require 'json/add/date'
# x = Date.today.as_json
# # => {"json_class"=>"Date", "y"=>2023, "m"=>11, "d"=>21, "sg"=>2299161.0}
#
# \Method +JSON.create+ deserializes such a hash, returning a \Date object:
#
# Date.json_create(x)
# # => #<Date: 2023-11-21 ((2460270j,0s,0n),+0s,2299161j)>
#
def as_json(*)
{
JSON.create_id => self.class.name,
'y' => year,
'm' => month,
'd' => day,
'sg' => start,
}
end
# Returns a JSON string representing +self+:
#
# require 'json/add/date'
# puts Date.today.to_json
#
# Output:
#
# {"json_class":"Date","y":2023,"m":11,"d":21,"sg":2299161.0}
#
def to_json(*args)
as_json.to_json(*args)
end
end
