module React
  module Rails
    # A renderer class suitable for `ActionController::Renderers`.
    # It is associated to `:component` in the Railtie.
    #
    # It is prerendered with {React::ServerRendering}.
    #
    # @example Rendering a component from a controller
    #   class TodosController < ApplicationController
    #     def index
    #       @todos = Todo.all
    #       render component: 'TodoList', props: { todos: @todos }, tag: 'span', class: 'todo'
    #     end
    #   end
    class ControllerRenderer
      include React::Rails::ViewHelper
      include ActionView::Helpers::TagHelper
      include ActionView::Helpers::TextHelper

      attr_accessor :output_buffer

      def initialize(options={})
        controller = options[:controller]
        @__react_component_helper = controller.__react_component_helper
      end

      # @return [String] Prerendered HTML for `component_name` with `options[:props]`
      def call(component_name, options, &block)
        props = options.fetch(:props, {})
        options = options.slice(:data, :aria, :tag, :class, :id).merge(prerender: true)
        react_component(component_name, props, options, &block)
      end
    end
  end
end