Synnefo

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# from collections import defaultdict

# 

from dbworker import DBWorker

class Config(DBWorker):

    """Config are properties holding persistent information about system state.

    """

    def __init__(self, **params):

        DBWorker.__init__(self, **params)

        execute = self.execute

        execute(""" create table if not exists config

                          ( key text primary key,

                            value text ) """)

    def get_value(self, key):

        """Return configuration value for key."""

        q = "select value from config where key = ?"

        self.execute(q, (key,))

        r = self.fetchone()

        if r is not None:

            return r[0]

        return None

    def set_value(self, key, value):

        """Set configuration entry.

        """

        q = "insert into config (key, value) values (?)"

        id = self.execute(q, (key, value)).lastrowid

        return id