class ImapServer
  class ClientHandler
    module Examine
      def handle_examine(msg:, user:)
        if !user
          msg.error_need_loggin
        elsif msg.args.size != 1
          msg.respond ServerMessage.new("BAD requires a folder name", tag: msg.tag)
        else
          handle_examine_folder(msg: msg, user: user, maildir_name: msg.args.first)
        end
      end

      # TODO: factorize with SELECT
      private
      def handle_examine_folder(msg:, user:, maildir_name:)
        if (open_folder = folders[folder])
          msg.respond ServerMessage.new("OK #{open_folder["ALL"].size} EXISTS", tag: msg.tag)
          msg.respond ServerMessage.new("OK #{open_folder["RECENTS"].size} RECENTS", tag: msg.tag)
          msg.respond ServerMessage.new("OK EXAMINE completed", tag: msg.tag)
        else
          msg.respond ServerMessage.new("NO #{folder} do not exists", tag: msg.tag)
        end
      end

      # sample
      def folders
        {
          "INBOX" => {
            "ALL"     => [1, 2, 3, 5],
            "RECENTS" => [5],
          },
          "Sent" => [4],
        }
      end

    end
  end
end