Sample Controller Pattern with Turbo

client_variables_controller.rb

# frozen_string_literal: true

module Tools
  class ClientVariablesController < Tools::ToolsController
    before_action :set_client_variable, except: [:create]
    before_action :set_client

    def edit
      render turbo_stream: [
        turbo_stream.replace('variables-form', partial: 'form')
      ]
    end

    def create
      @client_variable = ClientVariable.new(client: @client)
      @client_variable.assign_attributes(client_variable_params)

      flash.now.notice = 'Variable saved'
      create_response(@client_variable.save)
    end

    def update
      @client_variable.assign_attributes(client_variable_params)
      flash.now.notice = 'Variable updated'
      create_response(@client_variable.save)
    end

    def destroy
      create_response(@client_variable.destroy)
    end

    private

    def set_client
      @client = Client.find(params[:client_id]) if params[:client_id]
      @client = @client_variable.client if @client_variable
    end

    def set_client_variable
      @client_variable = ClientVariable.find(params[:id])
    end

    def client_variable_params
      params
        .require(:client_variable)
        .permit(:tag, :value, :data_type)
    end

    def create_response(success)
      if success
        @client_variable = ClientVariable.new(client: @client)
        @client_variables = ClientVariable.for_client(@client.id)
        render turbo_stream: [
          turbo_stream.replace('flash', partial: 'tools/shared/flash'),
          turbo_stream.replace('variable-form', partial: 'form'),
          turbo_stream.replace('variable-table', partial: 'table')
        ]
      else
        flash.now.notice = nil
        flash.now.alert = "Error: #{@client_variable.errors.first.message}"
        render turbo_stream: turbo_stream.replace('flash', partial: 'tools/shared/flash')
      end
    end
  end
end