require 'common/errors'
require 'common/runner'

class MvRunner
  include Runner

  def run(plugin, src, dst)
    # Why think too hard? An user has an @, a domain doesn't.
    if not src.include?('@') then
      # We only support moving users right now, and the destination
      # domain must already exist.
      raise NotImplementedError.new('Only users can be moved.')
    end

    # Handle this once so we don't have to do it in every plugin.
    if not dst.include?('@') then
      msg = "the destination user #{dst} is not valid"
      raise InvalidUserError.new(msg)
    end

    begin
      src_description = plugin.describe_user(src)
      plugin.mv_user(src, dst)
      msg  = "Moved user #{src} (#{src_description}) "
      msg += "to #{dst}."
      report(plugin, msg)
    rescue InvalidUserError => e
      report(plugin, e.message)
    rescue NonexistentUserError => e
      report(plugin, e.message)
    rescue NonexistentDomainError => e
      report(plugin, e.message)
    rescue StandardError => e
      msg = "There was an error (#{e.to_s}) moving the user: #{e.message}"
      report(plugin, msg)
      Kernel.exit(ExitCodes::DATABASE_ERROR)
    end
  end

end