class IMAPProcessor::IDLE

# File lib/imap_processor/idle.rb, line 18
def initialize(options)
  super

  raise IMAPProcessor::Error, 'only one mailbox is supported' if
    @boxes.length > 1
end

# File lib/imap_processor/idle.rb, line 10
  def self.process_args(args)
    super __FILE__, args do |opts, options|
      opts.banner << <<-EOF
imap_idle lists messages added or expunged from a mailbox
      EOF
    end
  end

# File lib/imap_processor/idle.rb, line 25
def run
  mailbox = @boxes.first

  connect do |connection|
    raise IMAPProcessor::Error, 'IDLE not supported on this server' unless
      connection.idle?

    imap = connection.imap

    imap.select mailbox
    exists = imap.responses['EXISTS'].first

    log "Starting IDLE"

    imap.idle do |response|
      next unless Net::IMAP::UntaggedResponse === response

      case response.name
      when 'EXPUNGE' then
        puts "Expunged message #{response.data}"
      when 'EXISTS' then
        latest_uid = response.data
        new = latest_uid - exists
        puts "#{new} messages added"

        show_messages_in mailbox, ((exists + 1)..latest_uid)

        exists = response.data
      when 'RECENT' then
        puts "#{response.data} recent messages"
      when 'OK' then # ending IDLE
      else
        log "Unhandled untagged response: #{response.name}"
      end
    end
  end
end

# File lib/imap_processor/idle.rb, line 63
def show_messages_in(mailbox, uids)
  connect do |connection|
    imap = connection.imap

    imap.select mailbox

    show_messages uids
  end
end