Method: React::TopLevelRailsComponent#top_level_render

Defined in:
lib/rails-helpers/top_level_rails_component.rb

#top_level_render ⇒ Object 



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# File 'lib/rails-helpers/top_level_rails_component.rb', line 21

def top_level_render
  paths_searched = []
  component = nil
  if params.component_name.start_with?('::')
    # if absolute path of component is given, look it up and fail if not found
    paths_searched << params.component_name
    component = begin
                  Object.const_get(params.component_name)
                rescue NameError
                  nil
                end
  else
    # if relative path is given, look it up like this
    # 1) we check each path + controller-name + component-name
    # 2) if we can't find it there we check each path + component-name
    # if we can't find it we just try const_get
    # so (assuming controller name is Home)
    # ::Foo::Bar will only resolve to some component named ::Foo::Bar
    # but Foo::Bar will check (in this order) ::Home::Foo::Bar, ::Components::Home::Foo::Bar, ::Foo::Bar, ::Components::Foo::Bar
    self.class.search_path.each do |scope|
      paths_searched << "#{scope.name}::#{params.controller}::#{params.component_name}"
      component = begin
                    scope.const_get(params.controller, false).const_get(params.component_name, false)
                  rescue NameError
                    nil
                  end
      break if component != nil
    end
    unless component
      self.class.search_path.each do |scope|
        paths_searched << "#{scope.name}::#{params.component_name}"
        component = begin
                      scope.const_get(params.component_name, false)
                    rescue NameError
                      nil
                    end
        break if component != nil
      end
    end
  end
  return React::RenderingContext.render(component, params.render_params) if component && component.method_defined?(:render)
  raise "Could not find component class '#{params.component_name}' for params.controller '#{params.controller}' in any component directory. Tried [#{paths_searched.join(", ")}]"
end