Limnoria/plugins/Poll.py

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#!/usr/bin/env python
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# -*- coding:utf-8 -*-
###
# Copyright (c) 2002, Stéphan Kochen
# 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.
###
"""
A module for managing and voting on polls.
"""
import supybot
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__revision__ = "$Id$"
__author__ = supybot.authors.strike
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import supybot.plugins as plugins
import os
import time
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import supybot.conf as conf
import supybot.utils as utils
import supybot.ircdb as ircdb
import supybot.ircutils as ircutils
import supybot.privmsgs as privmsgs
import supybot.callbacks as callbacks
try:
import sqlite
except ImportError:
raise callbacks.Error, 'You need to have PySQLite installed to use this ' \
'plugin. Download it at <http://pysqlite.sf.net/>'
class Poll(callbacks.Privmsg, plugins.ChannelDBHandler):
def __init__(self):
callbacks.Privmsg.__init__(self)
plugins.ChannelDBHandler.__init__(self)
def makeDb(self, filename):
if os.path.exists(filename):
db = sqlite.connect(filename)
else:
db = sqlite.connect(filename)
cursor = db.cursor()
cursor.execute("""CREATE TABLE polls (
id INTEGER PRIMARY KEY,
question TEXT UNIQUE ON CONFLICT IGNORE,
started_by INTEGER,
open INTEGER)""")
cursor.execute("""CREATE TABLE options (
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id INTEGER,
poll_id INTEGER,
option TEXT,
UNIQUE (poll_id, id) ON CONFLICT IGNORE)""")
cursor.execute("""CREATE TABLE votes (
user_id INTEGER,
poll_id INTEGER,
option_id INTEGER,
UNIQUE (user_id, poll_id)
ON CONFLICT IGNORE)""")
db.commit()
return db
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def _getUserId(self, prefix):
try:
return ircdb.users.getUserId(prefix)
except KeyError:
irc.errorNotRegistered(Raise=True)
def _getUserName(self, id):
try:
return ircdb.users.getUser(int(id)).name
except KeyError:
return 'an unknown user'
def _getId(self, irc, idStr):
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try:
return int(idStr)
except ValueError:
irc.error('The id must be a valid integer.', Raise=True)
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def poll(self, irc, msg, args):
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"""[<channel>] <id>
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Displays the poll question and options for the given poll id.
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<channel> is only necessary if the message isn't sent in the channel
itself.
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"""
channel = privmsgs.getChannel(msg, args)
poll_id = privmsgs.getArgs(args)
db = self.getDb(channel)
cursor = db.cursor()
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cursor.execute("""SELECT question, started_by, open
FROM polls WHERE id=%s""", poll_id)
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if cursor.rowcount == 0:
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irc.error('There is no poll with id %s.' % poll_id)
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return
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question, started_by, open = cursor.fetchone()
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starter = ircdb.users.getUser(started_by).name
if open:
statusstr = 'open'
else:
statusstr = 'closed'
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cursor.execute("""SELECT id, option FROM options WHERE poll_id=%s""",
poll_id)
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if cursor.rowcount == 0:
optionstr = 'This poll has no options yet'
else:
options = cursor.fetchall()
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optionstr = 'Options: %s' %\
' '.join(['%s: %r' % tuple(t) for t in options])
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pollstr = 'Poll #%s: %r started by %s. %s. Poll is %s.' % \
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(poll_id, question, starter, optionstr, statusstr)
irc.reply(pollstr)
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def open(self, irc, msg, args):
"""[<channel>] <question>
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Creates a new poll with the given question. <channel> is only
necessary if the message isn't sent in the channel itself.
"""
channel = privmsgs.getChannel(msg, args)
question = privmsgs.getArgs(args)
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userId = self._getUserId(msg.prefix)
db = self.getDb(channel)
cursor = db.cursor()
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cursor.execute("""INSERT INTO polls VALUES (NULL, %s, %s, 1)""",
question, userId)
db.commit()
cursor.execute("""SELECT id FROM polls WHERE question=%s""", question)
id = cursor.fetchone()[0]
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irc.replySuccess('(poll #%s added)' % id)
def close(self, irc, msg, args):
"""[<channel>] <id>
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Closes the poll with the given <id>; further votes will not be allowed.
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<channel> is only necessary if the message isn't sent in the channel
itself.
"""
channel = privmsgs.getChannel(msg, args)
id = privmsgs.getArgs(args)
id = self._getId(irc, id)
db = self.getDb(channel)
cursor = db.cursor()
# Check to make sure that the poll exists
cursor.execute("""SELECT id FROM polls WHERE id=%s""", id)
if cursor.rowcount == 0:
irc.error('Id #%s is not an existing poll.')
return
cursor.execute("""UPDATE polls SET open=0 WHERE id=%s""", id)
irc.replySuccess()
def add(self, irc, msg, args):
"""[<channel>] <id> <option text>
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Add an option with the given text to the poll with the given id.
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<channel> is only necessary if the message isn't sent in the channel
itself.
"""
channel = privmsgs.getChannel(msg, args)
(poll_id, option) = privmsgs.getArgs(args, required=2)
poll_id = self._getId(irc, poll_id)
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userId = self._getUserId(msg.prefix)
db = self.getDb(channel)
cursor = db.cursor()
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# Only the poll starter or an admin can add options
cursor.execute("""SELECT started_by FROM polls
WHERE id=%s""",
poll_id)
if cursor.rowcount == 0:
irc.error('There is no such poll.')
return
if not ((userId == cursor.fetchone()[0]) or
(ircdb.checkCapability(userId, 'admin'))):
irc.error('That poll isn\'t yours and you aren\'t an admin.')
return
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# and NOBODY can add options once a poll has votes
cursor.execute("""SELECT COUNT(user_id) FROM votes
WHERE poll_id=%s""",
poll_id)
if int(cursor.fetchone()[0]) != 0:
irc.error('Cannot add options to a poll with votes.')
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return
# Get the next highest id
cursor.execute("""SELECT MAX(id)+1 FROM options
WHERE poll_id=%s""",
poll_id)
option_id = cursor.fetchone()[0] or 1
cursor.execute("""INSERT INTO options VALUES
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(%s, %s, %s)""",
option_id, poll_id, option)
irc.replySuccess()
def vote(self, irc, msg, args):
"""[<channel>] <poll id> <option id>
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Vote for the option with the given id on the poll with the given poll
id. This command can also be used to override any previous vote.
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<channel> is only necesssary if the message isn't sent in the channel
itself.
"""
channel = privmsgs.getChannel(msg, args)
(poll_id, option_id) = privmsgs.getArgs(args, required=2)
poll_id = self._getId(irc, poll_id)
option_id = self._getId(irc, option_id)
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userId = self._getUserId(msg.prefix)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT open
FROM polls WHERE id=%s""",
poll_id)
if cursor.rowcount == 0:
irc.error('There is no such poll.')
return
elif int(cursor.fetchone()[0]) == 0:
irc.error('That poll is closed.')
return
cursor.execute("""SELECT id FROM options
WHERE poll_id=%s
AND id=%s""",
poll_id, option_id)
if cursor.rowcount == 0:
irc.error('There is no such option.')
return
cursor.execute("""SELECT option_id FROM votes
WHERE user_id=%s AND poll_id=%s""",
userId, poll_id)
if cursor.rowcount == 0:
cursor.execute("""INSERT INTO votes VALUES (%s, %s, %s)""",
userId, poll_id, option_id)
else:
cursor.execute("""UPDATE votes SET option_id=%s
WHERE user_id=%s AND poll_id=%s""",
option_id, userId, poll_id)
irc.replySuccess()
def results(self, irc, msg, args):
"""[<channel>] <id>
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Shows the results for the poll with the given id. <channel> is only
necessary if the message is not sent in the channel itself.
"""
channel = privmsgs.getChannel(msg, args)
poll_id = privmsgs.getArgs(args)
poll_id = self._getId(irc, poll_id)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT id, question, started_by, open
FROM polls WHERE id=%s""",
poll_id)
if cursor.rowcount == 0:
irc.error('There is no such poll.')
return
(id, question, startedBy, open) = cursor.fetchone()
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startedBy = self._getUserName(startedBy)
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reply = 'Results for poll #%s: "%s" by %s' % \
(id, question, startedBy)
cursor.execute("""SELECT count(user_id), option_id
FROM votes
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WHERE poll_id=%s
GROUP BY option_id
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UNION
SELECT 0, id AS option_id
FROM options
WHERE poll_id=%s
AND id NOT IN (
SELECT option_id FROM votes
WHERE poll_id=%s)
GROUP BY option_id
ORDER BY count(user_id) DESC""",
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poll_id, poll_id, poll_id)
if cursor.rowcount == 0:
s = 'This poll has no votes yet.'
else:
results = []
for count, option_id in cursor.fetchall():
cursor.execute("""SELECT option FROM options
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WHERE id=%s AND poll_id=%s""",
option_id, poll_id)
option = cursor.fetchone()[0]
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results.append('%r: %s' % (option, int(count)))
s = utils.commaAndify(results)
reply += ' - %s' % s
irc.reply(reply)
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def list(self, irc, msg, args):
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"""[<channel>]
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Lists the currently open polls for <channel>. <channel> is only
necessary if the message isn't sent in the channel itself.
"""
channel = privmsgs.getChannel(msg, args)
db = self.getDb(channel)
cursor = db.cursor()
cursor.execute("""SELECT id, question FROM polls WHERE open=1""")
if cursor.rowcount == 0:
irc.reply('This channel currently has no open polls.')
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else:
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polls = ['#%s: %r' % tuple(t) for t in cursor.fetchall()]
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irc.reply(utils.commaAndify(polls))
Class = Poll
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: