lib,test: replace connection query() method with sync_exec{,_params}.
[mailshears.git] / lib / rm / plugins / davical.rb
index 5ca8bf131137be28b53b9a4f62c9afa456666500..1978e8025b20a7990c3e8bb73f954b759f0a4590 100644 (file)
 require 'pg'
 
-require 'common/plugin'
+require 'common/davical_plugin'
 require 'rm/rm_plugin'
 
+# Handle the removal of DAViCal users from its database. DAViCal has
+# no concept of domains.
+#
 class DavicalRm
-  #
-  # DAViCal only supports Postgres, so even if we ever are
-  # database-agnostic, this plugin can't be.
-  #
-  include Plugin
-  include RmPlugin
-
-  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 delete_domain(domain)
-    # DAViCal doesn't have a concept of domains.
-  end
-
-
-  def delete_account(account)
-    # Delete the given username. DAViCal uses foreign keys properly
-    # and only supports postgres, so we let the ON DELETE CASCADE
-    # trigger handle most of the work.
-    sql_queries = ['DELETE FROM usr WHERE username = $1']
-
-    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, [account])
-      end
-
-      connection.close()
-
-    rescue PGError => e
-      # Pretend like we're database-agnostic in case we ever are.
-      raise DatabaseError.new(e)
-    end
 
-  end
-
-
-  def get_leftover_domains(db_domains)
-    # AgenDAV doesn't have a concept of domains.
-    return []
-  end
-
-
-  def get_leftover_accounts(db_accounts)
-    # Get a list of all users who have logged in to DAViCal.
-    davical_accounts = self.get_davical_usernames()
-    return davical_accounts - db_accounts
-  end
+  include DavicalPlugin
+  include RmPlugin
 
 
-  protected;
+  # Remove *user* from the DAViCal database. This should remove him
+  # from _every_ table in which he is referenced. Fortunately, DAViCal
+  # uses foreign keys properly (and only supports postgres, where they
+  # work!), so we can let the ON DELETE CASCADE trigger handle most of
+  # the work.
+  #
+  # @param user [User] the user to remove.
+  #
+  def remove_user(user)
+    raise NonexistentUserError.new(user.to_s()) if not user_exists(user)
 
-  def get_principal_id(account)
-    principal_id = nil
+    sql_query = 'DELETE FROM usr WHERE username = $1;'
 
+    connection = PG::Connection.new(@db_hash)
     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.sync_exec_params(sql_query, [user.to_s()])
+    ensure
+      # Make sure the connection gets closed even if the query explodes.
       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
 
 
-  def get_davical_usernames()
-    usernames = []
-
-    begin
-      connection = PGconn.connect(@db_host,
-                                  @db_port,
-                                  @db_opts,
-                                  @db_tty,
-                                  @db_name,
-                                  @db_user,
-                                  @db_pass)
-
-      # User #1 is the super-user, and not tied to an email address.
-      sql_query  = 'SELECT username FROM usr WHERE user_no > 1;'
-
-      connection.query(sql_query) do |result|
-        usernames = result.field_values('username')
-      end
-
-      connection.close()
-    rescue PGError => e
-      # Pretend like we're database-agnostic in case we ever are.
-      raise DatabaseError.new(e)
-    end
-
-    return usernames
-  end
-
 end