+#!/usr/bin/python
+###############################################################################
+# #
+# Cappie #
+# Copyright (C) 2010 Michael Tremer #
+# #
+# This program is free software: you can redistribute it and/or modify #
+# it under the terms of the GNU General Public License as published by #
+# the Free Software Foundation, either version 3 of the License, or #
+# (at your option) any later version. #
+# #
+# This program is distributed in the hope that it will be useful, #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
+# GNU General Public License for more details. #
+# #
+# You should have received a copy of the GNU General Public License #
+# along with this program. If not, see <http://www.gnu.org/licenses/>. #
+# #
+###############################################################################
+
+import itertools
+import sqlite3
+
+class Database(object):
+ KEYS = ("EVENTS", "ADDRESSES")
+ _CREATE = ["CREATE TABLE IF NOT EXISTS addresses(mac, address, lastseen);",
+ "CREATE TABLE IF NOT EXISTS changes(address, lastchange);"]
+
+ counter = 0
+
+ def __init__(self, log):
+ self.log = log
+
+ self.__connection = None
+
+ def __del__(self):
+ self.close()
+
+ def open(self):
+ self.log.debug("Opening database")
+ if self.__connection:
+ self.close()
+ self.__connection = sqlite3.connect("test.db")
+ for statement in self._CREATE:
+ self.execute(statement)
+
+ def close(self):
+ self.log.debug("Closing database")
+ self.commit()
+ self.__connection.close()
+ self.__connection = None
+
+ def commit(self):
+ self.log.debug("Committing data to database")
+ self.__connection.commit()
+
+ def query(self, query, *parameters):
+ """Returns a row list for the given query and parameters."""
+ cursor = self._cursor()
+ self._execute(cursor, query, parameters)
+ column_names = [d[0] for d in cursor.description]
+ return [Row(itertools.izip(column_names, row)) for row in cursor]
+
+ def get(self, query, *parameters):
+ """Returns the first row returned for the given query."""
+ rows = self.query(query, *parameters)
+ if not rows:
+ return None
+ elif len(rows) > 1:
+ raise Exception("Multiple rows returned for Database.get() query")
+ else:
+ return rows[0]
+
+ def _cursor(self):
+ if not self.__connection:
+ self.open()
+ return self.__connection.cursor()
+
+ def execute(self, query, *parameters):
+ """Executes the given query, returning the lastrowid from the query."""
+ cursor = self._cursor()
+ self._execute(cursor, query, parameters)
+ return cursor.lastrowid
+
+ def _execute(self, cursor, query, parameters):
+ try:
+ return cursor.execute(query, parameters)
+ except sqlite3.OperationalError:
+ self.log.error("Error connecting to database")
+ self.close()
+ raise
+
+
+class Row(dict):
+ """A dict that allows for object-like property access syntax."""
+ def __getattr__(self, name):
+ try:
+ return self[name]
+ except KeyError:
+ raise AttributeError(name)