#!/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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###

"""
Keeps track of the last time a user was seen on a channel.
"""

__revision__ = "$Id$"

import supybot.plugins as plugins

import os
import re
import sets
import time
import getopt
import string
from itertools import imap, ifilter

import supybot.log as log
import supybot.conf as conf
import supybot.utils as utils
import supybot.world as world
import supybot.ircdb as ircdb
import supybot.ircmsgs as ircmsgs
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.privmsgs as privmsgs
import supybot.registry as registry
import supybot.callbacks as callbacks

def ircToLowerOrInt(x):
    if isinstance(x, int):
        return x
    else:
        return ircutils.toLower(x)

class IrcStringAndIntDict(utils.InsensitivePreservingDict):
    key = staticmethod(ircToLowerOrInt)

class SeenDB(plugins.ChannelUserDB):
    IdDict = IrcStringAndIntDict
    def serialize(self, v):
        return list(v)

    def deserialize(self, channel, id, L):
        (seen, saying) = L
        return (float(seen), saying)

    def update(self, channel, nickOrId, saying):
        seen = time.time()
        self[channel, nickOrId] = (seen, saying)
        self[channel, '<last>'] = (seen, saying)

    def seen(self, channel, nickOrId):
        return self[channel, nickOrId]

filename = os.path.join(conf.supybot.directories.data(), 'Seen.db')

class Seen(callbacks.Privmsg):
    noIgnore = True
    def __init__(self):
        self.db = SeenDB(filename)
        world.flushers.append(self.db.flush)
        callbacks.Privmsg.__init__(self)

    def die(self):
        if self.db.flush in world.flushers:
            world.flushers.remove(self.db.flush)
        else:
            self.log.debug('Odd, no flush in flushers: %r', world.flushers)
        self.db.close()
        callbacks.Privmsg.die(self)

    def doPrivmsg(self, irc, msg):
        if ircutils.isChannel(msg.args[0]):
            said = ircmsgs.prettyPrint(msg)
            channel = msg.args[0]
            self.db.update(channel, msg.nick, said)
            try:
                id = ircdb.users.getUserId(msg.prefix)
                self.db.update(channel, id, said)
            except KeyError:
                pass # Not in the database.

    def seen(self, irc, msg, args):
        """[<channel>] [--user] [<name>]

        Returns the last time <name> was seen and what <name> was last seen
        saying.  --user will look for user <name> instead of using <name> as
        a nick (registered users, remember, can be recognized under any number
        of nicks) <channel> is only necessary if the message isn't sent on the
        channel itself.  If <name> is not specified, the last person that was
        seen and their message will be returned.
        """
        channel = privmsgs.getChannel(msg, args)
        (optlist, rest) = getopt.getopt(args, '', ['user'])
        name = privmsgs.getArgs(rest, required=0, optional=1)
        if name:
            nickOrId = name
            if ('--user', '') in optlist:
                try:
                    nickOrId = ircdb.users.getUserId(name)
                except KeyError:
                    try:
                        hostmask = irc.state.nickToHostmask(name)
                        nickOrId = ircdb.users.getUserId(hostmask)
                    except KeyError:
                        irc.errorNoUser()
                        return
            try:
                (when, said) = self.db.seen(channel, nickOrId)
                irc.reply('%s was last seen here %s ago saying: %s' %
                          (name, utils.timeElapsed(time.time()-when), said))
            except KeyError:
                irc.reply('I have not seen %s.' % name)
        else:
            try:
                (when, said) = self.db.seen(channel, '<last>')
                irc.reply('Someone was last seen here %s ago saying: %s' %
                          (utils.timeElapsed(time.time()-when), said))
            except KeyError:
                irc.reply('I have never seen anyone.')


Class = Seen

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