Rails + Refile + Dropzone (7)

docs_controller.rb

class DocsController < ApplicationController
  respond_to :json, :js
  before_action :get_doc, only: [ :show, :reload_doc ]

  def create
    create_params = doc_params.to_h.merge!(current_user: current_user)

    result, op = Doc::Create.run(create_params)

    @operation = op
    @model     = op.model
    @form      = op.contract

    if @operation.valid? && @model.valid?
      load_tasks

      flash.now[:notice] = 'Doc uploaded successfully.'
      respond_with @model, location: -> { root_path }
    elsif !@model.valid?
      flash.now[:error] = 'Unable to upload doc.'
      respond_with @model, location: -> { root_path }
    elsif !@operation.valid?
      flash.now[:error] = 'Unable to upload doc.'
      respond_with @operation, location: -> { root_path }
    end
  end

  def show
    path     = @doc.file.backend.path(@doc.file.id)
    filename = @doc.file_filename
    type     = @doc.file_content_type

    send_file path, disposition: 'inline', type: type, filename: filename
  end

  def update
    update_params = doc_params.to_h.merge!(current_user: current_user, id: params[:id])

    result, op = Doc::Update.run(update_params)

    @operation      = op
    @model          = op.model
    @form           = op.contract
    @doc_task       = @model.doc_task

    if @operation.valid? && @model.valid?
      flash.now[:notice] = 'Doc uploaded successfully.'
      respond_with @model, location: -> { task_path(@doc_task) }
    elsif !@model.valid?
      flash.now[:error] = 'Unable to upload doc.'
      respond_with @model, location: -> { task_path(@doc_task) }
    elsif !@operation.valid?
      flash.now[:error] = 'Unable to upload doc.'
      respond_with @operation, location: -> { task_path(@doc_task) }
    end
  end

  def reload
    load_tasks
  end

  def reload_doc
    @doc_task = @doc.doc_task
  end

  private

  def get_doc
    @doc = Doc.find(params[:id])
  end

  def doc_params
    params.require(:doc).permit(:file, :doc_task_id)
  end

  def load_tasks
    @pending_tasks   = current_user.tasks.pending
    @completed_tasks = current_user.tasks.completed
  end
end