Limnoria/plugins/Quotes.py

#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
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###

"""
Maintains a Quotes database for each channel.
"""

import plugins

import re
import time
import getopt
import os.path

import sqlite

import conf
import utils
import ircdb
import privmsgs
import callbacks

class Quotes(plugins.ChannelDBHandler, callbacks.Privmsg):
    def __init__(self):
        plugins.ChannelDBHandler.__init__(self)
        callbacks.Privmsg.__init__(self)

    def makeDb(self, filename):
        if os.path.exists(filename):
            return sqlite.connect(db=filename, mode=0755,
                                  converters={'bool': bool})
        #else:
        db = sqlite.connect(db=filename, mode=0755, coverters={'bool': bool})
        cursor = db.cursor()
        cursor.execute("""CREATE TABLE quotes (
                          id INTEGER PRIMARY KEY,
                          added_by TEXT,
                          added_at TIMESTAMP,
                          quote TEXT
                          );""")
        cursor.execute("""CREATE TABLE quotegrabs (
                          id INTEGER PRIMARY KEY,
                          nick TEXT,
                          added_by TEXT,
                          quote TEXT
                          );""")
        db.commit()
        return db

    def add(self, irc, msg, args):
        """[<channel>] <quote>

        Adds <quote> to the quotes database for <channel>.  <channel> is only
        necessary if the message isn't sent in the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        quote = privmsgs.getArgs(args)
        db = self.getDb(channel)
        cursor = db.cursor()
        quotetime = int(time.time())
        cursor.execute("""INSERT INTO quotes
                         VALUES(NULL, %s, %s, %s)""",
                       msg.nick, quotetime, quote)
        db.commit()
        criteria = ['added_by="%s"' % msg.nick]
        criteria.append('added_at=%s' % quotetime)
        criteria.append('quote="%s"' % quote)
        sql = """SELECT id FROM quotes WHERE %s""" % ' AND '.join(criteria)
        cursor.execute(sql)
        quoteid = cursor.fetchone()[0]
        irc.reply(msg, '%s (Quote #%s added)' % (conf.replySuccess, quoteid))

    def num(self, irc, msg, args):
        """[<channel>]

        Returns the numbers of quotes in the quote database 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 COUNT(*) FROM quotes""")
        maxid = int(cursor.fetchone()[0])
        if maxid is None:
            maxid = 0
        QUOTE = utils.pluralize(maxid, 'quote')
        s = 'There %s %s %s in my database.' % (utils.be(maxid), maxid, QUOTE)
        irc.reply(msg, s)

    def quote(self, irc, msg, args):
        """[<channel>] --{id,regexp,from,with}=<value> ]

        Returns quote(s) matching the given criteria.  --from is who added the
        quote; --id is the id number of the quote; --regexp is a regular
        expression to search for.
        """
        channel = privmsgs.getChannel(msg, args)
        (optlist, rest) = getopt.getopt(args, '', ['id=', 'regexp=',
                                                   'from=', 'with='])
        if not optlist and not rest:
            raise callbacks.ArgumentError
        criteria = []
        formats = []
        predicateName = ''
        db = self.getDb(channel)
        for (option, argument) in optlist:
            option = option.lstrip('-')
            if option == 'id':
                try:
                    argument = int(argument)
                    criteria.append('id=%s' % argument)
                except ValueError:
                    irc.error(msg, '--id value must be an integer.')
                    return
            elif option == 'with':
                criteria.append('quote LIKE %s')
                formats.append('%%%s%%' % argument)
            elif option == 'from':
                criteria.append('added_by=%s')
                formats.append(argument)
            elif option == 'regexp':
                try:
                    r = utils.perlReToPythonRe(argument)
                except ValueError:
                    try:
                        r = re.compile(argument, re.I)
                    except re.error, e:
                        irc.error(msg, str(e))
                        return
                def p(s):
                    return int(bool(r.search(s)))
                predicateName += 'p'
                db.create_function(predicateName, 1, p)
                criteria.append('%s(quote)' % predicateName)
        for s in rest:
            try:
                i = int(s)
                criteria.append('id=%s' % i)
            except ValueError:
                s = '%%%s%%' % s
                criteria.append('quote LIKE %s')
                formats.append(s)
        sql = """SELECT id, quote FROM quotes
                 WHERE %s""" % ' AND '.join(criteria)
        #debug.printf(sql)
        cursor = db.cursor()
        cursor.execute(sql, *formats)
        if cursor.rowcount == 0:
            irc.reply(msg, 'No quotes matched that criteria.')
        elif cursor.rowcount == 1:
            (id, quote) = cursor.fetchone()
            irc.reply(msg, '#%s: %s' % (id, quote))
        elif cursor.rowcount > 10:
            irc.reply(msg, 'More than 10 quotes matched your criteria.  '
                           'Please narrow your query.')
        else:
            results = cursor.fetchall()
            idsWithSnippets = []
            for (id, quote) in results:
                s = '#%s: "%s..."' % (id, quote[:30])
                idsWithSnippets.append(s)
            irc.reply(msg, utils.commaAndify(idsWithSnippets))
        ### FIXME: we need to remove those predicates from the database.

    def random(self, irc, msg, args):
        """[<channel>]

        Returns a random quote from <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 FROM quotes
                          ORDER BY random()
                          LIMIT 1""")
        if cursor.rowcount != 1:
            irc.error(msg, 'It seems that quote database is empty.')
            return
        (id,) = cursor.fetchone()
        self.quote(irc, msg, [channel, '--id', str(id)])

    def info(self, irc, msg, args):
        """[<channel>] <id>

        Returns the metadata about the quote <id> in the quotes
        database for <channel>.  <channel> is only necessary if the message
        isn't sent in the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        id = privmsgs.getArgs(args)
        db = self.getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT * FROM quotes WHERE id=%s""", id)
        if cursor.rowcount == 1:
            (id, added_by, added_at, quote) = cursor.fetchone()
            timestamp = time.strftime(conf.humanTimestampFormat,
                                      time.localtime(int(added_at)))
            irc.reply(msg, 'Quote %r added by %s at %s.' % \
                           (quote, added_by, timestamp))
        else:
            irc.error(msg, 'There isn\'t a quote with that id.')

    def remove(self, irc, msg, args):
        """[<channel>] <id>

        Removes quote <id> from the quotes database for <channel>.  <channel>
        is only necessary if the message isn't sent in the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        id = privmsgs.getArgs(args)
        db = self.getDb(channel)
        cursor = db.cursor()
        capability = ircdb.makeChannelCapability(channel, 'op')
        if ircdb.checkCapability(msg.prefix, capability):
            cursor.execute("""DELETE FROM quotes WHERE id=%s""", id)
            if cursor.rowcount == 0:
                irc.error(msg, 'There was no such quote.')
            else:
                irc.reply(msg, conf.replySuccess)
        else:
            irc.error(msg, conf.replyNoCapability % capability)


Class = Quotes
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