Class: Interactify::Dsl::EachChain

Inherits:
Object
  • Object
show all
Defined in:
lib/interactify/dsl/each_chain.rb

Constant Summary collapse

MissingIteratableValueInContext = 
Class.new(ArgumentError)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(each_loop_klasses, plural_resource_name, evaluating_receiver, caller_info:) ⇒ EachChain

Returns a new instance of EachChain.



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# File 'lib/interactify/dsl/each_chain.rb', line 20

def initialize(each_loop_klasses, plural_resource_name, evaluating_receiver, caller_info:)
  @each_loop_klasses = each_loop_klasses
  @plural_resource_name = plural_resource_name
  @evaluating_receiver = evaluating_receiver
  @caller_info = caller_info
end

Instance Attribute Details

#caller_info ⇒ Object (readonly)

Returns the value of attribute caller_info.



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# File 'lib/interactify/dsl/each_chain.rb', line 10

def caller_info
  @caller_info
end

#each_loop_klasses ⇒ Object (readonly)

Returns the value of attribute each_loop_klasses.



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# File 'lib/interactify/dsl/each_chain.rb', line 10

def each_loop_klasses
  @each_loop_klasses
end

#evaluating_receiver ⇒ Object (readonly)

Returns the value of attribute evaluating_receiver.



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# File 'lib/interactify/dsl/each_chain.rb', line 10

def evaluating_receiver
  @evaluating_receiver
end

#plural_resource_name ⇒ Object (readonly)

Returns the value of attribute plural_resource_name.



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# File 'lib/interactify/dsl/each_chain.rb', line 10

def plural_resource_name
  @plural_resource_name
end

Class Method Details

.attach_klass(evaluating_receiver, *each_loop_klasses, plural_resource_name:, caller_info:) ⇒ Object 



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# File 'lib/interactify/dsl/each_chain.rb', line 12

def self.attach_klass(evaluating_receiver,
                      *each_loop_klasses,
                      plural_resource_name:,
                      caller_info:)
  iteratable = new(each_loop_klasses, plural_resource_name, evaluating_receiver, caller_info:)
  iteratable.attach_klass
end

Instance Method Details

#attach_klass ⇒ Object

rubocop:enable all



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# File 'lib/interactify/dsl/each_chain.rb', line 88

def attach_klass
  name = iterator_klass_name

  namespace.const_set(name, klass)
  namespace.const_get(name)
end

#iterator_klass_name ⇒ Object 



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# File 'lib/interactify/dsl/each_chain.rb', line 99

def iterator_klass_name
  prefix = "Each#{singular_resource_name.to_s.camelize}"

  UniqueKlassName.for(namespace, prefix)
end

#klass ⇒ Object

allows us to dynamically create an interactor chain that iterates over the packages and uses the passed in each_loop_klasses rubocop:disable all



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# File 'lib/interactify/dsl/each_chain.rb', line 31

def klass
  this = self

  Class.new do                                                                    # class SomeNamespace::EachPackage
    include Interactify                                                           #   include Interactify

    expects do                                                                    #   expects do
      required(this.plural_resource_name)                                         #     required(:packages)
    end                                                                           #   end

    define_singleton_method(:source_location) do                                  #   def self.source_location
      file, line = this.caller_info&.split(':') 
      return const_source_location(this.evaluating_receiver.to_s) if file.nil?

      [file, line&.to_i]
    end                                                                           #   end

    define_method(:run!) do                                                       #  def run!
      resources = context.send(this.plural_resource_name)                         #    packages = context.packages

      bail_with_error(resources) unless resources.respond_to?(:each_with_index)   #    raise MissingIteratableValueInContext unless packages.respond_to?(:each_with_index)

      context.send(this.plural_resource_name).each_with_index do |resource, index|#    context.packages.each_with_index do |package, index|
        context[this.singular_resource_name] = resource                           #       context.package = package
        context[this.singular_resource_index_name] = index                        #       context.package_index = index

        self.class.klasses.each do |interactor|                                   #       [A, B, C].each do |interactor|
          interactor.call!(context)                                               #         interactor.call!(context)
        end                                                                       #       end
      end                                                                         #     end

      context[this.singular_resource_name] = nil                                  #     context.package = nil
      context[this.singular_resource_index_name] = nil                            #     context.package_index = nil

      context                                                                     #     context
    end                                                                           #   end

    define_method(:bail_with_error) do |resources|
      message = "Expected `context.#{this.plural_resource_name}`: #{resources.inspect}\nto respond to :each_with_index"
      raise MissingIteratableValueInContext, message
    end

    define_singleton_method(:klasses) do                                          #   def self.klasses
      klasses = instance_variable_get(:@klasses)                                  #     @klasses ||= Wrapper.wrap_many(self, [A, B, C])
      return klasses if klasses

      instance_variable_set(:@klasses, Wrapper.wrap_many(self, this.each_loop_klasses))
    end

    # "<SomeNamespace::EachPackage iterates_over: [A, B, C]>"
    define_method(:inspect) do
      "<#{this.namespace}::#{this.iterator_klass_name} iterates_over: #{this.each_loop_klasses.inspect}>"
    end
  end
end

#namespace ⇒ Object 



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# File 'lib/interactify/dsl/each_chain.rb', line 95

def namespace
  evaluating_receiver
end

#singular_resource_index_name ⇒ Object 



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# File 'lib/interactify/dsl/each_chain.rb', line 109

def singular_resource_index_name
  "#{singular_resource_name}_index".to_sym
end

#singular_resource_name ⇒ Object 



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# File 'lib/interactify/dsl/each_chain.rb', line 105

def singular_resource_name
  plural_resource_name.to_s.singularize.to_sym
end