Limnoria/plugins/Karma.py

#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
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"""
Plugin for handling Karma stuff for a channel.
"""

__revision__ = "$Id$"

import os
import sets
from itertools import imap

import supybot.conf as conf
import supybot.utils as utils
import supybot.plugins as plugins
import supybot.privmsgs as privmsgs
import supybot.registry as registry
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/>'


conf.registerPlugin('Karma')
conf.registerChannelValue(conf.supybot.plugins.Karma, 'simpleOutput',
    registry.Boolean(False, """Determines whether the bot will output shorter
    versions of the karma output when requesting a single thing's karma."""))
conf.registerChannelValue(conf.supybot.plugins.Karma, 'response',
    registry.Boolean(False, """Determines whether the bot will reply with a
    success message when something's karma is incrneased or decreased."""))
conf.registerChannelValue(conf.supybot.plugins.Karma, 'rankingDisplay',
    registry.Integer(3, """Determines how many highest/lowest karma things are
    shown when karma is called with no arguments."""))
conf.registerChannelValue(conf.supybot.plugins.Karma, 'mostDisplay',
    registry.Integer(25, """Determines how many karma things are shown when
    the most command is called.'"""))
conf.registerChannelValue(conf.supybot.plugins.Karma, 'allowSelfRating',
    registry.Boolean(False, """Determines whether users can adjust the karma
    of their nick."""))

class SqliteKarmaDB(object):
    def _getDb(self, channel):
        filename = plugins.makeChannelFilename(channel, 'Karma.db')
        if os.path.exists(filename):
            db = sqlite.connect(filename)
        else:
            db = sqlite.connect(filename)
            cursor = db.cursor()
            cursor.execute("""CREATE TABLE karma (
                              id INTEGER PRIMARY KEY,
                              name TEXT,
                              normalized TEXT UNIQUE ON CONFLICT IGNORE,
                              added INTEGER,
                              subtracted INTEGER
                              )""")
            db.commit()
        def p(s1, s2):
            return int(ircutils.nickEqual(s1, s2))
        db.create_function('nickeq', 2, p)
        return db

    def get(self, channel, thing):
        db = self._getDb(channel)
        thing = thing.lower()
        cursor = db.cursor()
        cursor.execute("""SELECT added, subtracted FROM karma
                          WHERE normalized=%s""", thing)
        if cursor.rowcount == 0:
            return None
        else:
            return map(int, cursor.fetchone())

    def gets(self, channel, things):
        db = self._getDb(channel)
        normalizedThings = dict(zip(map(str.lower, things), things))
        criteria = ' OR '.join(['normalized=%s'] * len(normalizedThings))
        sql = """SELECT name, added-subtracted FROM karma
                 WHERE %s ORDER BY added-subtracted DESC""" % criteria
        cursor.execute(sql, *normalizedThings)
        L = [(name, int(karma)) for (name, karma) in cursor.fetchall()]
        for (name, _) in L:
            del normalizedThings[name.lower()]
        neutrals = normalizedThings.values()
        neutrals.sort()
        return (L, neutrals)

    def top(self, channel, limit):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT name, added-subtracted FROM karma
                          ORDER BY added-subtracted DESC LIMIT %s""", limit)
        return [(t[0], int(t[1])) for t in cursor.fetchall()]

    def bottom(self, channel, limit):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT name, added-subtracted FROM karma
                          ORDER BY added-subtracted ASC LIMIT %s""", limit)
        return [(t[0], int(t[1])) for t in cursor.fetchall()]
        
    def rank(self, channel, thing):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT added-subtracted FROM karma
                          WHERE name=%s""", thing)
        if cursor.rowcount == 0:
            return None
        karma = int(cursor.fetchone()[0])
        cursor.execute("""SELECT COUNT(*) FROM karma
                          WHERE added-subtracted > %s""", karma)
        rank = int(cursor.fetchone()[0])
        return rank

    def size(self, channel):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT COUNT(*) FROM karma""")
        return int(cursor.fetchone()[0])
    
    def increment(self, channel, name):
        db = self._getDb(channel)
        cursor = db.cursor()
        normalized = name.lower()
        cursor.execute("""INSERT INTO karma VALUES (NULL, %s, %s, 0, 0)""",
                       name, normalized)
        cursor.execute("""UPDATE karma SET added=added+1
                          WHERE normalized=%s""", normalized)
        db.commit()
        
    def decrement(self, channel, thing):
        db = self._getDb(channel)
        cursor = db.cursor()
        normalized = name.lower()
        cursor.execute("""INSERT INTO karma VALUES (NULL, %s, %s, 0, 0)""",
                       name, normalized)
        cursor.execute("""UPDATE karma SET subtracted=subtracted+1
                          WHERE normalized=%s""", normalized)
        db.commit()

    def most(self, channel, kind, limit):
        if kind == 'increased':
            orderby = 'added'
        elif kind == 'decreased':
            orderby = 'subtracted'
        elif kind == 'active':
            orderby = 'added+subtracted'
        else:
            raise ValueError, 'invalid kind'
        sql = """SELECT name, %s FROM karma ORDER BY %s DESC LIMIT %s""" % \
              (orderby, orderby, limit)
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute(sql)
        return [(name, int(i)) for (name, i) in cursor.fetchall()]
    

def KarmaDB():
    return SqliteKarmaDB()
        
class Karma(callbacks.PrivmsgCommandAndRegexp):
    addressedRegexps = ['increaseKarma', 'decreaseKarma']
    def __init__(self):
        self.db = KarmaDB()
        callbacks.PrivmsgCommandAndRegexp.__init__(self)

    def karma(self, irc, msg, args):
        """[<channel>] [<thing> [<thing> ...]]

        Returns the karma of <text>.  If <thing> is not given, returns the top
        three and bottom three karmas.  If one <thing> is given, returns the
        details of its karma; if more than one <thing> is given, returns the
        total karma of each of the the things. <channel> is only necessary if
        the message isn't sent on the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        if len(args) == 1:
            name = args[0]
            t = self.db.get(channel, name)
            if t is None:
                irc.reply('%s has neutral karma.' % name)
            else:
                (added, subtracted) = t
                total = added - subtracted
                if self.registryValue('simpleOutput', channel):
                    s = '%s: %s' % (name, total)
                else:
                    s = 'Karma for %r has been increased %s ' \
                        'and decreased %s for a total karma of %s.' % \
                        (name, utils.nItems('time', added),
                         utils.nItems('time', subtracted), total)
                irc.reply(s)
        elif len(args) > 1:
            (L, neutrals) = self.db.gets(channel, args)
            if L:
                s = utils.commaAndify(['%s: %s' % t for t in L])
                if neutrals:
                    neutral = '.  %s %s neutral karma' % \
                              (utils.commaAndify(neutrals),
                               utils.has(len(neutrals)))
                    s += neutral
                irc.reply(s + '.')
            else:
                irc.reply('I didn\'t know the karma for any of those things.')
        else: # No name was given.  Return the top/bottom N karmas.
            limit = self.registryValue('rankingDisplay', channel)
            top = self.db.top(channel, limit)
            highest = ['%r (%s)' % t for t in self.db.top(channel, limit)]
            lowest = ['%r (%s)' % t for t in self.db.bottom(channel, limit)]
            if not (highest and lowest):
                irc.error('I have no karma for this channel.')
                return
            rank = self.db.rank(channel, msg.nick)
            if rank is not None:
                total = self.db.size(channel)
                rankS = '  You (%s) are ranked %s out of %s.' % \
                        (msg.nick, rank, total)
            else:
                rankS = ''
            s = 'Highest karma: %s.  Lowest karma: %s.%s' % \
                (utils.commaAndify(highest), utils.commaAndify(lowest), rankS)
            irc.reply(s)

    _mostAbbrev = utils.abbrev(['increased', 'decreased', 'active'])
    def most(self, irc, msg, args):
        """[<channel>] {increased,decreased,active}

        Returns the most increased, the most decreased, or the most active
        (the sum of increased and decreased) karma things.  <channel> is only
        necessary if the message isn't sent in the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        kind = privmsgs.getArgs(args)
        try:
            kind = self._mostAbbrev[kind]
            L = self.db.most(channel, kind)
            if L:
                L = ['%r: %s' % (name, i) for (name, i) in L]
                irc.reply(utils.commaAndify(L))
            else:
                irc.error('I have no karma for this channel.')
        except (KeyError, ValueError):
            raise callbacks.ArgumentError

    def increaseKarma(self, irc, msg, match):
        r"^(\S+)\+\+(|\s+)$"
        channel = msg.args[0]
        if not ircutils.isChannel(channel):
            return
        name = match.group(1)
        if not self.registryValue('allowSelfRating', msg.args[0]):
            if ircutils.strEqual(name, msg.nick):
                return
        self.db.increment(channel, name)
        if self.registryValue('response', msg.args[0]):
            irc.replySuccess()

    def decreaseKarma(self, irc, msg, match):
        r"^(\S+)--(|\s+)$"
        channel = msg.args[0]
        if not ircutils.isChannel(channel):
            return
        name = match.group(1)
        if not self.registryValue('allowSelfRating', msg.args[0]):
            if ircutils.strEqual(name, msg.nick):
                return
        self.db.decrement(channel, name)
        if self.registryValue('response', msg.args[0]):
            irc.replySuccess()


Class = Karma

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