module ViewModel::Callbacks

def init(context_name, *other_params)
  @context_name    = context_name
  @required_params = other_params
  @env_class = Value.new(:_callbacks, :view, context_name, *other_params) do
    include CallbackEnvContext
    delegate :model, to: :view
    unless context_name == :context
      alias_method :context, context_name
    end
    # If we have any other params, generate a combined positional/keyword
    # constructor wrapper
    if other_params.present?
      params = other_params.map { |x| "#{x}:" }.join(', ')
      args   = other_params.join(', ')
      instance_eval(<<-SRC, __FILE__, __LINE__ + 1)
        def create(callbacks, view, context, #{params})
          self.new(callbacks, view, context, #{args})
        end
      SRC
    else
      def self.create(callbacks, view, context) # rubocop:disable Lint/NestedMethodDefinition
        self.new(callbacks, view, context)
      end
    end
  end
end