Limnoria/plugins/Markov.py

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2003-04-11 08:56:37 +02:00
#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# 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.
###
"""
Add the module docstring here. This will be used by the setup.py script.
"""
from baseplugin import *
import random
import os.path
import sqlite
import debug
import ircutils
import privmsgs
import callbacks
def configure(onStart, afterConnect, advanced):
# This will be called by setup.py to configure this module. onStart and
# afterConnect are both lists. Append to onStart the commands you would
# like to be run when the bot is started; append to afterConnect the
# commands you would like to be run when the bot has finished connecting.
from questions import expect, anything, something, yn
onStart.append('load Markov')
class Markov(callbacks.Privmsg, ChannelDBHandler):
def __init__(self):
ChannelDBHandler.__init__(self)
callbacks.Privmsg.__init__(self)
def makeDb(self, filename):
if os.path.exists(filename):
return sqlite.connect(filename)
db = sqlite.connect(filename)
cursor = db.cursor()
cursor.execute("""CREATE TABLE pairs (
id INTEGER PRIMARY KEY,
first TEXT,
second TEXT,
UNIQUE (first, second) ON CONFLICT IGNORE
)""")
cursor.execute("""CREATE TABLE follows (
id INTEGER PRIMARY KEY,
pair_id INTEGER,
word TEXT
)""")
cursor.execute("""CREATE INDEX follows_pair_id ON follows (pair_id)""")
db.commit()
return db
def doPrivmsg(self, irc, msg):
if not ircutils.isChannel(msg.args[0]):
return callbacks.Privmsg.doPrivmsg(self, irc, msg)
channel = msg.args[0]
db = self.getDb(channel)
cursor = db.cursor()
words = msg.args[1].split()
for (first, second, follower) in window(words, 3):
cursor.execute("""INSERT INTO pairs VALUES (NULL, %s, %s)""",
first, second)
cursor.execute("""SELECT id FROM pairs
WHERE first=%s AND second=%s""", first, second)
id = int(cursor.fetchone()[0])
cursor.execute("""INSERT INTO follows VALUES (NULL, %s, %s)""",
id, follower)
db.commit()
return callbacks.Privmsg.doPrivmsg(self, irc, msg)
def markov(self, irc, msg, args):
"""[<channel>] [<length>]
Returns a randomly-generated Markov Chain generated sentence from the
data kept on <channel> (which is only necessary if not sent in the
channel itself) with <length> words. <length> must be less than 80.
"""
channel = privmsgs.getChannel(msg, args)
length = privmsgs.getArgs(args, needed=0, optional=1)
db = self.getDb(channel)
cursor = db.cursor()
if not length:
length = random.randrange(30, 50)
try:
length = int(length)
assert 0 <= length <= 80
except (ValueError, AssertionError):
irc.error(msg, 'Length must be an integer between 0 and 80')
return
words = []
cursor.execute("""SELECT id, first, second FROM pairs
ORDER BY random()
LIMIT 1""")
(id, first, second) = cursor.fetchone()
debug.printf((id, first, second))
id = int(id)
words.append(first)
words.append(second)
debug.printf(words)
while len(words) < length:
debug.printf((words[-2], words[-1]))
sql = """SELECT follows.word FROM pairs, follows
WHERE pairs.first=%s AND
pairs.second=%s AND
pairs.id=follows.pair_id
ORDER BY random()
LIMIT 1"""
cursor.execute(sql, words[-2], words[-1])
results = cursor.fetchone()
if not results:
break
word = results[0]
words.append(word)
irc.reply(msg, ' '.join(words))
def markovpairs(self, irc, msg, args):
"""[<channel>]
Returns the number of Markov's chain links in the database for
<channel>.
"""
channel = privmsgs.getChannel(msg, args)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT COUNT(*) FROM pairs""")
n = cursor.fetchone()[0]
s = 'There are %s pairs in my Markov database for %s' % (n, channel)
irc.reply(msg, s)
def markovfollows(self, irc, msg, args):
"""[<channel>]
Returns the number of Markov's third links in the database for
<channel>.
"""
channel = privmsgs.getChannel(msg, args)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT COUNT(*) FROM follows""")
n = cursor.fetchone()[0]
s = 'There are %s follows in my Markov database for %s' % (n, channel)
irc.reply(msg, s)
Class = Markov
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: