class FileManagersController < ApplicationController
  include ActionView::Helpers::NumberHelper
  before_action :check_login? , :set_base_url, except: [:download]
  layout "file_manager"
  def render_403
    render :file => "#{Rails.root}/app/views/errors/403.html", :layout => false, :status => 403, :formats => [:html]
  end
  def render_404
    render :file => "#{Rails.root}/app/views/errors/404.html", :layout => false, :status => 404, :formats => [:html]
  end
  def forbidden_error
    render :body => nil, :status => 403
  end
  def self.custom_widget_data
    @root = FileManagerRoot.first
    @settings = @root.file_manager_settings rescue []
    ac = ActionController::Base.new
    ac.render_to_string("file_managers/custom_widget_data",:locals=>{:@custom_data_field=>@custom_data_field,:@field_name=>@field_name,:@settings=>@settings})
  end
  def check_login?
    @current_user = current_user
    @current_user_id = current_user.id
    if @current_user
      if ['index_backend','path'].include?( params[:action] ) && params[:setting_id].blank?
        module_app = ModuleApp.where(:key=>'file_manager').first
        unless (@current_user.is_admin_for_module?(module_app) rescue true)
          render_403 and return
        end
      end
    else
      render_403 and return
    end
  end
  def download
    upload = FileManagerUpload.where(:id=>params[:id]).first
    if upload
      if upload.is_trash
        if upload.file_manager_trash
          send_file(upload.file_manager_trash.trash_path)
        else
          render_404
        end
      else
        options = {}
        if params[:preview]
          options[:disposition] = 'inline'
        end
        send_file(upload.get_real_path, options)
      end
    else
      render_404
    end
  end

  private
  def check_editable(path=nil, current_user_id=nil)
    query_hash = {:path=>path,:user_id=>current_user_id}
    query_hash[:file_manager_setting_id] = @setting_id
    FileManagerUpload.where(query_hash).count != 0
  end

  def safe_expand_path(path)
    current_directory = File.expand_path(@root_path)
    tested_path = File.expand_path(path, @root_path)
    if @disable_path_traversal && !(tested_path.starts_with?(current_directory))
      raise ArgumentError, 'Should not be parent of root'
    end
    tested_path
  end

  def check_path_exist(path)
    @absolute_path = safe_expand_path(path)
    @relative_path = path
    raise ActionController::RoutingError, 'Not Found' unless File.exists?(@absolute_path)
    @absolute_path
  end

  def set_base_url(tmp_params=params)
    @base_url = ENV['BASE_URL'] || 'root'
    @root_path = ENV['BASE_DIRECTORY'] || FileManagerRoot::RootPath
    @root = FileManagerRoot.first
    @disable_path_traversal = @root.disable_path_traversal
    @format_time = I18n.locale.to_s == 'zh_tw' ? '%Y/%m/%d %H:%M' : '%d %b %Y %H:%M'
    if tmp_params[:setting_id].present?
      @setting = FileManagerSetting.find(tmp_params[:setting_id]) rescue nil
    end
    @only_editable_for_uploader = false
    @setting_id = nil
    if @setting
      @setting_id = @setting.id
      @root_path = Pathname.new(@root_path).join(@setting.root_path).to_s
      @only_editable_for_uploader = @setting.only_editable_for_uploader
    end
    @default_editable = !@only_editable_for_uploader
    @only_select_folder = (tmp_params[:select_mode] == 'true')
  end
end