JLU5-SupyPlugins/accountsdb.py
James Lu edeb892db1 accountsdb: use shutil.move instead of os.rename
On Windows, os.rename will error if the destination exists
2023-04-27 23:26:14 -07:00

131 lines
5.2 KiB
Python

###
# Copyright (c) 2019, James Lu <james@overdrivenetworks.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
"""
accountsdb: Provides storage for user-specific data via Supybot accounts, ident@host, or nicks.
"""
import pickle
import os
from supybot import ircdb, log, conf, registry
MODES = ["accounts", "identhost", "nicks"]
DEFAULT_MODE = MODES[0]
class _AccountsDBAddressConfig(registry.OnlySomeStrings):
validStrings = MODES
CONFIG_OPTION_NAME = "DBAddressingMode"
CONFIG_OPTION = _AccountsDBAddressConfig(DEFAULT_MODE, """Sets the DB addressing mode.
This requires reloading the plugin to take effect. Valid settings include accounts
(save users by Supybot accounts and ident@host if not registered), identhost
(save users by ident@host), and nicks (save users by nicks).
When changing addressing modes, existing keys will be left intact, but migration between
addressing modes is NOT supported.""")
class AccountsDB():
"""
Abstraction to map users to third-party account names.
This stores users by their bot account first, falling back to their
ident@host if they are not logged in.
"""
def __init__(self, plugin_name, filename, addressing_mode=DEFAULT_MODE, case_sensitive=False):
"""
Loads the existing database, creating a new one in memory if none
exists.
"""
self.db = {}
self._plugin_name = plugin_name
self.filename = conf.supybot.directories.data.dirize(filename)
self.case_sensitive = case_sensitive
self.addressing_mode = addressing_mode
try:
with open(self.filename, 'rb') as f:
self.db = pickle.load(f)
except Exception as e:
log.debug('%s: Unable to load database, creating '
'a new one: %s', self._plugin_name, e)
else:
if not case_sensitive:
for key, val in self.db.copy().items():
if not key.islower():
log.debug('%s: case-shifting key %s to %s', self._plugin_name, key, key.lower())
self.db[key.lower()] = val
del self.db[key]
def flush(self):
"""Exports the database to a file."""
tmp_filename = self.filename + '.tmp'
try:
with open(tmp_filename, 'wb') as f:
pickle.dump(self.db, f, 2)
shutil.move(tmp_filename, self.filename)
except Exception as e:
log.exception('%s: Unable to write database: %s', self._plugin_name, e)
def _get_key(self, prefix):
nick, identhost = prefix.split('!', 1)
if self.addressing_mode == "accounts":
try: # Try to first look up the caller as a bot account.
userobj = ircdb.users.getUser(prefix)
return userobj.name
except KeyError: # If that fails, store them by nick@host.
return identhost
elif self.addressing_mode == "identhost":
return identhost
elif self.addressing_mode == "nicks":
return nick
else:
raise ValueError("Unknown addressing mode %r" % self.addressing_mode)
def set(self, prefix, newId):
"""Sets a user ID given the user's prefix."""
user = self._get_key(prefix)
if not self.case_sensitive:
user = user.lower()
self.db[user] = newId
def get(self, prefix):
"""Sets a user ID given the user's prefix."""
user = self._get_key(prefix)
log.debug('%s: looking up prefix %s; got user %s', self._plugin_name, prefix, user)
if not self.case_sensitive:
user = user.lower()
# Automatically returns None if entry does not exist
return self.db.get(user)