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