require 'fileutils'

require 'common/filesystem'
require 'common/dovecot_plugin'
require 'mv/mv_plugin'

class DovecotMv

  include DovecotPlugin
  include MvPlugin

  def mv_user(user_from, user_to)
    # Move the user's mail directory from one domain (that should
    # exist) to another domain (that should exist).
    #
    # This is actually a little subtle, because none of the
    # directories in question have to exist. If I create two new
    # domains in postfixadmin and one mailbox but never deliver any
    # mail, it should be possible to move the mailbox to the other
    # domain. No directories will exist until mail is delivered,
    # though.

    # get_user_path() will fail if there's no mailbox to move. It will
    # also fail on an invalid user -- oh well!
    begin
      from_path = self.get_user_path(user_from)
    rescue NonexistentUserError
      # Do nothing, there's no source mailbox...
      return
    end

    # We may need to create the target domain directory, even if the
    # domain exists in the database.
    domain_to = user_to.split('@')[1]
    domain_dir = self.get_domain_path(domain_to)
    FileUtils.mkdir_p(domain_dir)

    # The from_path exists or else we would have returned earlier. The
    # parent of to_path exists because we just created it.
    to_path = self.get_user_path(user_to, false)
    FileUtils.mv(from_path, to_path)
  end

end