158 lines
5.2 KiB
Python
158 lines
5.2 KiB
Python
"""
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Module - dr.botzo modular functionality base class
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Copyright (C) 2010 Brian S. Stephan
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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from ConfigParser import NoSectionError, NoOptionError
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import inspect
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import re
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import sys
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import sqlite3
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from extlib import irclib
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class Module(object):
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"""Declare a base class used for creating classes that have real functionality."""
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def priority(self):
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return 50
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def __init__(self, irc, config, server):
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"""Construct a feature module. Inheritors can do special things here, but
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should be sure to call Module.__init__.
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"""
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self.irc = irc
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self.config = config
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self.server = server
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# open database connection
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dbfile = self.config.get('dr.botzo', 'database')
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self.conn = sqlite3.connect(dbfile)
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self.conn.row_factory = sqlite3.Row
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# setup regexp function in sqlite
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def regexp(expr, item):
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reg = re.compile(expr, re.IGNORECASE)
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return reg.search(item) is not None
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self.conn.create_function('REGEXP', 2, regexp)
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# set up database for this module
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self.db_init()
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# print what was loaded, for debugging
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print("loaded " + self.__class__.__name__)
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def register_handlers(self, server):
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"""Hook handler functions into the IRC library. This is called when the
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module is loaded. Classes with special stuff to do could implement this
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and set up the appropriate handlers, e.g.:
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self.server.add_global_handler('welcome', self.on_connect)
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Unless you're sure what you're doing, don't register pubmsg or privmsg.
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They are handled by the alias support in DrBotIRC, and will call your
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module's do().
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"""
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def unregister_handlers(self):
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"""Unhook handler functions from the IRC library. Inverse of the above.
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This is called by reload, to remove the soon-to-be old object from the server
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global handlers (or whatever has been added via register_handlers). Classes
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inheriting from Module could implement this, e.g.:
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self.server.remove_global_handler('welcome', self.on_connect)
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"""
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def save(self):
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"""Save whatever the module may need to save. Sync files, etc.
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Implement this if you need it.
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"""
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def shutdown(self):
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"""Do pre-deletion type cleanup.
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Implement this to close databases, write to disk, etc.
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"""
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def remove_metaoptions(self, list):
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"""Remove metaoptions from provided list, which was probably from a config file."""
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list.remove('debug')
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def retransmit_event(self, event):
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"""
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Pretend that some event the bot has generated is rather an incoming IRC
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event. Why one would do this is unclear, but I wrote it and then realized
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I didn't need it.
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"""
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self.server._handle_event(event)
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def get_db(self):
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"""
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Get a database connection to sqlite3. Once grabbed, it should be closed
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when work is done. Modules that need a database connection should
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test for and create (or, eventually, alter) required table structure
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in their __init__ IF that structure does not already exist. Well-behaved
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modules should use a prefix in their table names (eg "karma_log" rather
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than "log")
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See also db_module_registered, below.
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"""
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return self.conn
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def db_module_registered(self, modulename):
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"""
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ask the database for a version number for a module. Return that version
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number if the module has registered, or None if not
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"""
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conn = self.get_db()
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version = None
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try:
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cur = conn.cursor()
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cur.execute("SELECT version FROM drbotzo_modules WHERE module = :name",
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{'name': modulename})
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version = cur.fetchone()
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if (version != None):
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version = version[0]
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except sqlite3.Error as e:
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print("sqlite error:" + str(e))
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return version
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def db_init(self):
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"""
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Set up the database tables and so on, if subclass is planning on using it.
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"""
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def do(self, connection, event, nick, userhost, what, admin_unlocked):
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"""Do the primary thing this module was intended to do, in most cases.
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Implement this method in your subclass to have a fairly-automatic hook into
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IRC functionality. This is called by DrBotIRC during pubmsg and privmsg
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events.
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"""
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print("looks like someone forgot to implement do!")
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# vi:tabstop=4:expandtab:autoindent
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# kate: indent-mode python;indent-width 4;replace-tabs on;
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