huginn/app/controllers/scenario_imports_controller.rb

class ScenarioImportsController < ApplicationController
  def new
    @scenario_import = ScenarioImport.new(:url => params[:url])
  end

  def create
    @scenario_import = ScenarioImport.new(scenario_import_params)
    @scenario_import.set_user(current_user)

    if @scenario_import.valid? && @scenario_import.import_confirmed? && @scenario_import.import
      redirect_to @scenario_import.scenario, notice: "Import successful!"
    else
      render action: "new"
    end
  end

  private

  def scenario_import_params
    merges = params[:scenario_import].delete(:merges)
    params.require(:scenario_import).permit(:url, :data, :file, :do_import) do |params|
      params[:merges] = merges
    end
  end
end