Limnoria/plugins/Factoids.py

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#!/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.
###
"""
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Handles "factoids," little tidbits of information held in a database and
available on demand via several commands.
"""
import plugins
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import time
import getopt
import string
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import os.path
from itertools import imap
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import sqlite
import conf
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import utils
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import ircdb
import ircutils
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import privmsgs
import callbacks
class Factoids(plugins.ChannelDBHandler, callbacks.Privmsg):
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def __init__(self):
plugins.ChannelDBHandler.__init__(self)
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callbacks.Privmsg.__init__(self)
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def makeDb(self, filename):
if os.path.exists(filename):
return sqlite.connect(filename)
db = sqlite.connect(filename)
cursor = db.cursor()
cursor.execute("""CREATE TABLE keys (
id INTEGER PRIMARY KEY,
key TEXT UNIQUE ON CONFLICT IGNORE,
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locked BOOLEAN
)""")
cursor.execute("""CREATE TABLE factoids (
id INTEGER PRIMARY KEY,
key_id INTEGER,
added_by TEXT,
added_at TIMESTAMP,
fact TEXT
)""")
cursor.execute("""CREATE TRIGGER remove_factoids
BEFORE DELETE ON keys
BEGIN
DELETE FROM factoids WHERE key_id = old.id;
END
""")
db.commit()
return db
def learn(self, irc, msg, args):
"""[<channel>] <key> as <value>
Associates <key> with <value>. <channel> is only necessary if the
message isn't sent on the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
try:
i = args.index('as')
except ValueError:
raise callbacks.ArgumentError
args.pop(i)
key = ' '.join(args[:i])
factoid = ' '.join(args[i:])
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db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("SELECT id, locked FROM keys WHERE key LIKE %s", key)
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if cursor.rowcount == 0:
cursor.execute("""INSERT INTO keys VALUES (NULL, %s, 0)""", key)
db.commit()
cursor.execute("SELECT id, locked FROM keys WHERE key LIKE %s",key)
(id, locked) = imap(int, cursor.fetchone())
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capability = ircdb.makeChannelCapability(channel, 'factoids')
if not locked:
if not ircdb.checkCapability(msg.prefix, capability):
irc.error(msg, conf.replyNoCapability % capability)
return
if ircdb.users.hasUser(msg.prefix):
name = ircdb.users.getUser(msg.prefix).name
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else:
name = msg.nick
cursor.execute("""INSERT INTO factoids VALUES
(NULL, %s, %s, %s, %s)""",
id, name, int(time.time()), factoid)
db.commit()
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, 'That factoid is locked.')
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def whatis(self, irc, msg, args):
"""[<channel>] <key> [<number>]
Looks up the value of <key> in the factoid database. If given a
number, will return only that exact factoid. <channel> is only
necessary if the message isn't sent in the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
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if args[-1].isdigit():
number = args.pop()
else:
number = ''
key = privmsgs.getArgs(args)
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if number:
try:
number = int(number)
except ValueError:
irc.error(msg, '%s is not a valid number.' % number)
return
else:
number = 0
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db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT factoids.fact FROM factoids, keys WHERE
keys.key LIKE %s AND factoids.key_id=keys.id
ORDER BY factoids.id
LIMIT 20""", key)
if cursor.rowcount == 0:
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irc.error(msg, 'No factoid matches that key.')
else:
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if not number:
factoids = []
counter = 1
for result in cursor.fetchall():
factoids.append('(#%s) %s' % (counter, result[0]))
counter += 1
irc.reply(msg,'%r could be %s' % (key, ', or '.join(factoids)))
else:
try:
irc.reply(msg, cursor.fetchall()[number-1][0])
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except IndexError:
irc.error(msg, 'That\'s not a valid number for this key.')
return
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def lock(self, irc, msg, args):
"""[<channel>] <key>
Locks the factoid(s) associated with <key> so that they cannot be
removed or added to. <channel> is only necessary if the message isn't
sent in the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
key = privmsgs.getArgs(args)
db = self.getDb(channel)
capability = ircdb.makeChannelCapability(channel, 'factoids')
if ircdb.checkCapability(msg.prefix, capability):
cursor = db.cursor()
cursor.execute("UPDATE keys SET locked=1 WHERE key LIKE %s", key)
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db.commit()
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, conf.replyNoCapability % capability)
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def unlock(self, irc, msg, args):
"""[<channel>] <key>
Unlocks the factoid(s) associated with <key> so that they can be
removed or added to. <channel> is only necessary if the message isn't
sent in the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
key = privmsgs.getArgs(args)
db = self.getDb(channel)
capability = ircdb.makeChannelCapability(channel, 'factoids')
if ircdb.checkCapability(msg.prefix, capability):
cursor = db.cursor()
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cursor.execute("UPDATE keys SET locked=0 WHERE key LIKE %s", key)
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db.commit()
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, conf.replyNoCapability % capability)
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def forget(self, irc, msg, args):
"""[<channel>] <key> [<number>|*]
Removes the factoid <key> from the factoids database. If there are
more than one factoid with such a key, a number is necessary to
determine which one should be removed. A * can be used to remove all
factoids associated with a key. <channel> is only necessary if
the message isn't sent in the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
if args[-1].isdigit():
number = int(args.pop())
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number -= 1
if number < 0:
irc.error(msg, 'Negative numbers aren\'t valid.')
return
elif args[-1] == '*':
del args[-1]
number = True
else:
number = None
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key = privmsgs.getArgs(args)
db = self.getDb(channel)
capability = ircdb.makeChannelCapability(channel, 'factoids')
if ircdb.checkCapability(msg.prefix, capability):
cursor = db.cursor()
cursor.execute("""SELECT keys.id, factoids.id
FROM keys, factoids
WHERE key LIKE %s AND
factoids.key_id=keys.id""", key)
if cursor.rowcount == 0:
irc.error(msg, 'There is no such factoid.')
elif cursor.rowcount == 1 or number is True:
(id, _) = cursor.fetchone()
cursor.execute("""DELETE FROM factoids WHERE key_id=%s""", id)
cursor.execute("""DELETE FROM keys WHERE key LIKE %s""", key)
db.commit()
irc.reply(msg, conf.replySuccess)
else:
if number is not None:
results = cursor.fetchall()
try:
(_, id) = results[number]
except IndexError:
irc.error(msg, 'Invalid factoid number.')
return
cursor.execute("DELETE FROM factoids WHERE id=%s", id)
db.commit()
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, '%s factoids have that key. ' \
'Please specify which one to remove, ' \
'or use * to designate all of them.' % \
cursor.rowcount)
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else:
irc.error(msg, conf.replyNoCapability % capability)
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def random(self, irc, msg, args):
"""[<channel>]
Returns a random factoid from the database for <channel>. <channel>
is only necessary if the message isn't sent in the channel itself.
"""
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channel = privmsgs.getChannel(msg, args)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT fact, key_id FROM factoids
ORDER BY random()
LIMIT 3""")
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if cursor.rowcount != 0:
L = []
for (factoid, id) in cursor.fetchall():
cursor.execute("""SELECT key FROM keys WHERE id=%s""", id)
(key,) = cursor.fetchone()
L.append('"%s": %s' % (ircutils.bold(key), factoid))
irc.reply(msg, '; '.join(L))
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else:
irc.error(msg, 'I couldn\'t find a factoid.')
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def info(self, irc, msg, args):
"""[<channel>] <key>
Gives information about the factoid(s) associated with <key>.
<channel> is only necessary if the message isn't sent in the channel
itself.
"""
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channel = privmsgs.getChannel(msg, args)
key = privmsgs.getArgs(args)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("SELECT id, locked FROM keys WHERE key LIKE %s", key)
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if cursor.rowcount == 0:
irc.error(msg, 'No factoid matches that key.')
return
(id, locked) = imap(int, cursor.fetchone())
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cursor.execute("""SELECT added_by, added_at FROM factoids
WHERE key_id=%s
ORDER BY id""", id)
factoids = cursor.fetchall()
L = []
counter = 0
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for (added_by, added_at) in factoids:
counter += 1
added_at = time.strftime(conf.humanTimestampFormat,
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time.localtime(int(added_at)))
L.append('#%s was added by %s at %s' % (counter,added_by,added_at))
factoids = '; '.join(L)
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s = 'Key %r is %s and has %s associated with it: %s' % \
(key, locked and 'locked' or 'not locked',
utils.nItems(counter, 'factoid'), factoids)
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irc.reply(msg, s)
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def change(self, irc, msg, args):
"""[<channel>] <key> <number> <regexp>
Changes the factoid #<number> associated with <key> according to
<regexp>.
"""
channel = privmsgs.getChannel(msg, args)
(key, number, regexp) = privmsgs.getArgs(args, required=3)
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try:
replacer = utils.perlReToReplacer(regexp)
except ValueError, e:
irc.error(msg, 'Invalid regexp: %s' % e)
return
try:
number = int(number)
if number <= 0:
raise ValueError
except ValueError:
irc.error(msg, 'Invalid key id.')
return
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT factoids.id, factoids.fact
FROM keys, factoids
WHERE keys.key LIKE %s AND
keys.id=factoids.key_id""", key)
if cursor.rowcount == 0:
irc.error(msg, 'I couldn\'t find any key %r' % key)
return
elif cursor.rowcount < number:
irc.error(msg, 'That\'s not a valid key id.')
return
(id, fact) = cursor.fetchall()[number-1]
newfact = replacer(fact)
cursor.execute("UPDATE factoids SET fact=%s WHERE id=%s", newfact, id)
db.commit()
irc.reply(msg, conf.replySuccess)
_sqlTrans = string.maketrans('*?', '%_')
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def search(self, irc, msg, args):
"""[<channel>] [--{regexp,exact}=<value>] [<glob>]
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Searches the keyspace for keys matching <glob>. If --regexp is given,
it associated value is taken as a regexp and matched against the keys;
if --exact is given, its associated value is taken as an exact string
to match against the key.
"""
channel = privmsgs.getChannel(msg, args)
(optlist, rest) = getopt.getopt(args, '', ['regexp=', 'exact='])
if not optlist and not rest:
raise callbacks.ArgumentError
criteria = []
formats = []
predicateName = 'p'
db = self.getDb(channel)
for (option, arg) in optlist:
if option == '--exact':
### FIXME: no way to escape LIKE metacharacters in SQLite.
criteria.append('key LIKE %s')
formats.append('%' + arg + '%')
elif option == '--regexp':
criteria.append('%s(key)' % predicateName)
try:
r = utils.perlReToPythonRe(arg)
except ValueError, e:
irc.error(msg, 'Invalid regexp: %s' % e)
return
def p(s, r=r):
return int(bool(r.search(s)))
db.create_function(predicateName, 1, p)
predicateName += 'p'
for glob in rest:
if '*' not in glob and '?' not in glob:
glob = '*%s*' % glob
criteria.append('key LIKE %s')
formats.append(glob.translate(self._sqlTrans))
cursor = db.cursor()
sql = """SELECT key FROM keys WHERE %s""" % ' AND '.join(criteria)
cursor.execute(sql, formats)
if cursor.rowcount == 0:
irc.reply(msg, 'No keys matched that query.')
elif cursor.rowcount == 1:
self.whatis(irc, msg, [cursor.fetchone()[0]])
elif cursor.rowcount > 100:
irc.reply(msg, 'More than 100 keys matched that query; '
'please narrow your query.')
else:
keys = [repr(t[0]) for t in cursor.fetchall()]
s = utils.commaAndify(keys)
irc.reply(msg, s)
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Class = Factoids
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: