+require 'pg'
+
+require 'common/plugin'
+require 'rm/rm_plugin'
+
+class DavicalMv
+ #
+ # DAViCal only supports Postgres, so even if we ever are
+ # database-agnostic, this plugin can't be.
+ #
+ include Plugin
+ include MvPlugin
+
+ def initialize()
+ cfg = Configuration.new()
+ @db_host = cfg.davical_dbhost
+ @db_port = cfg.davical_dbport
+ @db_opts = cfg.davical_dbopts
+ @db_tty = cfg.davical_dbtty
+ @db_name = cfg.davical_dbname
+ @db_user = cfg.davical_dbuser
+ @db_pass = cfg.davical_dbpass
+ end
+
+
+ def describe_domain(domain)
+ # DAViCal doesn't have a concept of domains.
+ return 'N/A'
+ end
+
+
+ def describe_account(account)
+ principal_id = self.get_principal_id(account)
+
+ if principal_id.nil?
+ return 'User not found'
+ else
+ return "Principal ID: #{principal_id}"
+ end
+ end
+
+
+ def mv_domain(from, to)
+ # DAViCal doesn't have a concept of domains.
+ end
+
+
+ def mv_account(from, to)
+ # Delete the given username. DAViCal uses foreign keys properly
+ # and only supports postgres, so we let the ON UPDATE CASCADE
+ # trigger handle most of the work.
+ sql_queries = ['UPDATE usr SET username = $1 WHERE username = $2']
+
+ begin
+ 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, [to, from])
+ end
+
+ connection.close()
+
+ rescue PGError => e
+ # Pretend like we're database-agnostic in case we ever are.
+ raise DatabaseError.new(e)
+ end
+
+ end
+
+
+ protected;
+
+ def get_principal_id(account)
+ principal_id = nil
+
+ begin
+ connection = PGconn.connect(@db_host,
+ @db_port,
+ @db_opts,
+ @db_tty,
+ @db_name,
+ @db_user,
+ @db_pass)
+
+ sql_query = "SELECT principal.principal_id "
+ sql_query += "FROM (principal INNER JOIN usr "
+ sql_query += " ON principal.user_no = usr.user_no) "
+ sql_query += "WHERE usr.username = $1;"
+
+ connection.query(sql_query, [account]) do |result|
+ if result.num_tuples > 0
+ principal_id = result[0]['principal_id']
+ end
+ end
+
+ connection.close()
+
+ rescue PGError => e
+ # Pretend like we're database-agnostic in case we ever are.
+ raise DatabaseError.new(e)
+ end
+
+ return principal_id
+ end
+
+end