dry-rb/dry-logic

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lib/dry/logic/operations/implication.rb

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# frozen_string_literal: true

require "dry/logic/operations/binary"
require "dry/logic/result"

module Dry
  module Logic
    module Operations
      class Implication < Binary
        def type
          :implication
        end

        def operator
          :then
        end

        def call(input)
          left_result = left.(input)

          if left_result.success?
            right_result = right.(input)
            Result.new(right_result.success?, id) { right_result.to_ast }
          else
            Result::SUCCESS
          end
        end

        def [](input)
          if left[input]
            right[input]
          else
            true
          end
        end
      end
    end
  end
end