Class: Bed::Type

Inherits:
Object show all
Defined in:
lib/bed/definition.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/bed/definition.rb', line 33

def schema
  @schema
end

Class Method Details

.define(schema) ⇒ Object 



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# File 'lib/bed/definition.rb', line 35

def define(schema)
  @schema = schema
  Data.define(*schema.fields.keys) do

    def initialize(...)
      super
      validate
    end

    define_method(:deconstruct) do
      self.class.schema.fields.keys.map do |key|
        value = public_send(key)
        if value.is_a?(Data) && value.class.respond_to?(:schema)
          value.deconstruct
        else
          value
        end
      end
    end

    define_method(:deconstruct_keys) do |keys = nil|
      keys ||= self.class.schema.fields.keys
      keys.each_with_object({}) do |key, hash|
        if self.class.schema.fields.key?(key)
          value = public_send(key)
          hash[key] = if value.is_a?(Data) && value.class.respond_to?(:schema)
                        value.deconstruct_keys
                      else
                        value
                      end
        end
      end
    end

    define_method(:to_hash) do
      self.class.schema.fields.keys.each_with_object({}) do |key, hash|
        value = public_send(key)
        hash[key] = if value.is_a?(Data) && value.class.respond_to?(:schema)
                      value.to_hash
                    else
                      value
                    end
      end
    end

    define_method(:validate) do
      pattern = "case self\nin [#{self.class.schema.pattern}]\ntrue\nelse\nfalse\nend"
      eval(pattern)
    end

    # Class variable to store the schema
    class_variable_set(:@@schema, schema)

    # Class method to access the schema
    define_singleton_method(:schema) do
      class_variable_get(:@@schema)
    end
  end
end