#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
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# modification, are permitted provided that the following conditions are met:
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#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
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#     derived from this software without specific prior written consent.
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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###

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

__revision__ = "$Id$"

import supybot.plugins as plugins

import re
import time
import getopt
import os.path

import supybot.conf as conf
import supybot.utils as utils
import supybot.ircdb as ircdb
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 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
                          );""")
        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()
        sql = """SELECT id FROM quotes
                 WHERE added_by=%s AND added_at=%s AND quote=%s"""
        cursor.execute(sql, msg.nick, quotetime, quote)
        quoteid = cursor.fetchone()[0]
        irc.replySuccess('(Quote #%s added)' % quoteid)

    def stats(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
        s = 'There %s %s in my database.' % \
            (utils.be(maxid), utils.nItems('quote', maxid))
        irc.reply(s)

    def get(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('--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(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)
        cursor = db.cursor()
        cursor.execute(sql, *formats)
        if cursor.rowcount == 0:
            irc.reply('No quotes matched that criteria.')
        elif cursor.rowcount == 1:
            (id, quote) = cursor.fetchone()
            irc.reply('#%s: %s' % (id, quote))
        elif cursor.rowcount > 10:
            irc.reply('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(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('It seems that quote database is empty.')
            return
        (id,) = cursor.fetchone()
        self.get(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.supybot.humanTimestampFormat(),
                                      time.localtime(int(added_at)))
            irc.reply('Quote %r added by %s at %s.' %
                      (quote, added_by, timestamp))
        else:
            irc.error('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()
        cursor.execute("""DELETE FROM quotes WHERE id=%s""", id)
        if cursor.rowcount == 0:
            irc.error('There was no such quote.')
        else:
            irc.replySuccess()


Class = Quotes
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: