require 'pg'

require 'common/roundcube_plugin'
require 'rm/rm_plugin'

class RoundcubeRm

  include RoundcubePlugin
  include RmPlugin

  def delete_user(user)
    # Delete the given username and any records in other tables
    # belonging to it.
    raise NonexistentUserError.new(user.to_s()) if not user_exists(user)

    user_id = self.get_user_id(user)

    # The Roundcube developers were nice enough to include
    # DBMS-specific install and upgrade scripts, so Postgres can take
    # advantage of ON DELETE triggers. Here's an example:
    #
    #  ...
    #  user_id integer NOT NULL
    #    REFERENCES users (user_id) ON DELETE CASCADE ON UPDATE CASCADE
    #
    # This query is of course necessary with any DBMS:
    sql_queries = ['DELETE FROM users WHERE user_id = $1::int;']

    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, [user_id])
    end

    connection.close()
  end

end