###
# Copyright (c) 2002-2004, Jeremiah Fincher
# All rights reserved.
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# 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.
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#   * 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
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# 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
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# POSSIBILITY OF SUCH DAMAGE.
###

"""
Greets users who join the channel with a recognized hostmask with a nice
little greeting.
"""

__revision__ = "$Id: Herald.py,v 1.46 2004/12/29 06:46:35 skorobeus Exp $"

import os
import time
import getopt

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
from supybot.commands import *
import supybot.ircmsgs as ircmsgs
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.registry as registry
import supybot.callbacks as callbacks

filename = conf.supybot.directories.data.dirize('Herald.db')

class HeraldDB(plugins.ChannelUserDB):
    def serialize(self, v):
        return [v]

    def deserialize(self, channel, id, L):
        if len(L) != 1:
            raise ValueError
        return L[0]

conf.registerPlugin('Herald')
conf.registerChannelValue(conf.supybot.plugins.Herald, 'heralding',
    registry.Boolean(True, """Determines whether messages will be sent to the
    channel when a recognized user joins; basically enables or disables the
    plugin."""))
conf.registerChannelValue(conf.supybot.plugins.Herald, 'throttleTime',
    registry.PositiveInteger(600, """Determines the minimum number of seconds
    between heralds."""))
conf.registerChannelValue(conf.supybot.plugins.Herald, 'default',
    registry.String('', """Sets the default herald to use.  If a user has a
    personal herald specified, that will be used instead.  If set to the empty
    string, the default herald will be disabled."""))
conf.registerChannelValue(conf.supybot.plugins.Herald.default, 'notice',
    registry.Boolean(True, """Determines whether the default herald will be
    sent as a NOTICE instead of a PRIVMSG."""))
conf.registerChannelValue(conf.supybot.plugins.Herald.default, 'public',
    registry.Boolean(False, """Determines whether the default herald will be
    sent publicly."""))
conf.registerChannelValue(conf.supybot.plugins.Herald, 'throttleTimeAfterPart',
    registry.PositiveInteger(60, """Determines the minimum number of seconds
    after parting that the bot will not herald the person when he or she
    rejoins."""))

class Herald(callbacks.Privmsg):
    def __init__(self):
        self.__parent = super(Herald, self)
        self.__parent.__init__()
        self.db = HeraldDB(filename)
        world.flushers.append(self.db.flush)
        self.lastParts = plugins.ChannelUserDictionary()
        self.lastHerald = plugins.ChannelUserDictionary()

    def die(self):
        if self.db.flush in world.flushers:
            world.flushers.remove(self.db.flush)
        self.db.close()
        self.__parent.die()

    def doJoin(self, irc, msg):
        if ircutils.strEqual(irc.nick, msg.nick):
            return # It's us.
        channel = msg.args[0]
        irc = callbacks.SimpleProxy(irc, msg)
        if self.registryValue('heralding', channel):
            try:
                id = ircdb.users.getUserId(msg.prefix)
                herald = self.db[channel, id]
            except KeyError:
                default = self.registryValue('default', channel)
                if default:
                    default = ircutils.standardSubstitute(irc, msg, default)
                    msgmaker = ircmsgs.privmsg
                    if self.registryValue('default.notice', channel):
                        msgmaker = ircmsgs.notice
                    target = msg.nick
                    if self.registryValue('default.public', channel):
                        target = channel
                    irc.queueMsg(msgmaker(target, default))
                return
            now = time.time()
            throttle = self.registryValue('throttleTime', channel)
            if now - self.lastHerald.get((channel, id), 0) > throttle:
                if (channel, id) in self.lastParts:
                   i = self.registryValue('throttleTimeAfterPart', channel)
                   if now - self.lastParts[channel, id] < i:
                       return
                self.lastHerald[channel, id] = now
                herald = ircutils.standardSubstitute(irc, msg, herald)
                irc.reply(herald, prefixName=False)

    def doPart(self, irc, msg):
        try:
            id = self._getId(irc, msg.prefix)
            self.lastParts[msg.args[0], id] = time.time()
        except KeyError:
            pass

    def _getId(self, irc, userNickHostmask):
        try:
            id = ircdb.users.getUserId(userNickHostmask)
        except KeyError:
            if not ircutils.isUserHostmask(userNickHostmask):
                hostmask = irc.state.nickToHostmask(userNickHostmask)
                id = ircdb.users.getUserId(hostmask)
            else:
                raise KeyError
        return id

    def default(self, irc, msg, args, channel, optlist, text):
        """[<channel>] [--remove|<msg>]

        If <msg> is given, sets the default herald to <msg>.  A <msg> of ""
        will remove the default herald.  If <msg> is not given, returns the
        current default herald.  <channel> is only necessary if the message
        isn't sent in the channel itself.
        """
        if optlist and text:
            raise callbacks.ArgumentError
        for (option, _) in optlist:
            if option == 'remove':
                self.setRegistryValue('default', '', channel)
                irc.replySuccess()
                return
        if text:
            self.setRegistryValue('default', text, channel)
            irc.replySuccess()
        else:
            resp = self.registryValue('default', channel) or \
                   'I do not have a default herald set for %s.' % channel
            irc.reply(resp)
    default = wrap(default, ['channel',
                             getopts({'remove': ''}),
                             additional('text')])

    def get(self, irc, msg, args, channel, user):
        """[<channel>] [<user|nick>]

        Returns the current herald message for <user> (or the user
        <nick|hostmask> is currently identified or recognized as).  If <user>
        is not given, defaults to the user giving the command.  <channel>
        is only necessary if the message isn't sent in the channel itself.
        """
        try:
            herald = self.db[channel, user.id]
            irc.reply(herald)
        except KeyError:
            irc.error('I have no herald for %s.' % user.name)
    get = wrap(get, ['channel', first('otherUser', 'user')])

    # I chose not to make <user|nick> optional in this command because
    # if it's not a valid username (e.g., if the user tyops and misspells a
    # username), it may be nice not to clobber the user's herald.
    def add(self, irc, msg, args, channel, user, herald):
        """[<channel>] <user|nick> <msg>

        Sets the herald message for <user> (or the user <nick|hostmask> is
        currently identified or recognized as) to <msg>.  <channel> is only
        necessary if the message isn't sent in the channel itself.
        """
        self.db[channel, user.id] = herald
        irc.replySuccess()
    add = wrap(add, ['channel', 'otherUser', 'text'])

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

        Removes the herald message set for <user>, or the user
        <nick|hostmask> is currently identified or recognized as.  If <user>
        is not given, defaults to the user giving the command.
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        try:
            del self.db[channel, user.id]
            irc.replySuccess()
        except KeyError:
            irc.error('I have no herald for that user.')
    remove = wrap(remove, ['channel', first('otherUser', 'user')])

    def change(self, irc, msg, args, channel, user, changer):
        """[<channel>] [<user|nick>] <regexp>

        Changes the herald message for <user>, or the user <nick|hostmask> is
        currently identified or recognized as, according to <regexp>.  If
        <user> is not given, defaults to the calling user. <channel> is only
        necessary if the message isn't sent in the channel itself.
        """
        s = self.db[channel, user.id]
        newS = changer(s)
        self.db[channel, user.id] = newS
        irc.replySuccess()
    change = wrap(change, ['channel',
                          first('otherUser', 'user'),
                           'regexpReplacer'])


Class = Herald

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