require 'pg'

require 'common/agendav_plugin'
require 'mv/mv_plugin'

class AgendavMv

  include AgendavPlugin
  include MvPlugin

  def mv_user(src, dst)
    # It's obviously an error if the source user does not exist. It
    # would also be an error if the destination domain didn't exist;
    # however, Agendav doesn't know about domains, so we let that slide.
    raise NonexistentUserError.new(src.to_s()) if not user_exists(src)

    # And it's an error if the destination user exists already.
    raise UserAlreadyExistsError.new(dst.to_s()) if user_exists(dst)

    sql_queries = ['UPDATE prefs SET username = $1 WHERE username = $2;']
    sql_queries << 'UPDATE shared SET user_from = $1 WHERE user_from = $2;'
    sql_queries << 'UPDATE shared SET user_which = $1 WHERE user_which = $2;'

    connection = PGconn.connect(@db_host, @db_port, @db_opts, @db_tty,
                                @db_name, @db_user, @db_pass)

    sql_queries.each do |sql_query|
      connection.query(sql_query, [dst.to_s(), src.to_s()])
    end

    connection.close()
  end

end