Trying to play around ideas with different FormBuilders for Rails.

form_builder.rb

class FormBuilder
  def text_field(method, **options)
    tag.input type: :text, **options_for(__method__, method, **options)
  end

  def options_for(type, method, index: @index, namespace: @options[:namespace], multiple: false, **options)
    Options.new(self, type, method, index:, namespace:, multiple:, **options)
  end

  class Options
    def initialize(form, type, method, index:, namespace:, multiple:, **options)
      @options = options.dup
      @options[:id]    ||= form.field_id(method, index:, namespace:)
      @options[:name]  ||= form.field_name(method, index:, multiple:)
      @options[:value] ||= form.field_value(method, type)
      @options[:size]    = @options[:maxlength] unless @options.key?(:size)
      @options
    end
    delegate :to_hash, :to_h, to: :@options
  end
end