#!/usr/bin/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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#   * 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.
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###

"""
Greets users who join the channel with a recognized hostmask with a nice
little greeting.  Otherwise, can greet 
"""

import plugins

import os
import time

import log
import conf
import utils
import ircdb
import ircmsgs
import ircutils
import privmsgs
import callbacks
import configurable


def configure(onStart, afterConnect, advanced):
    # This will be called by setup.py to configure this module.  onStart and
    # afterConnect are both lists.  Append to onStart the commands you would
    # like to be run when the bot is started; append to afterConnect the
    # commands you would like to be run when the bot has finished connecting.
    from questions import expect, anything, something, yn
    onStart.append('load Herald')


class HeraldDB(object):
    def __init__(self):
        self.heralds = {}
        dataDir = conf.supybot.directories.data()
        self.filename = os.path.join(dataDir, 'Herald.db')
        self.open()

    def open(self):
        dataDir = conf.supybot.directories.data()
        if os.path.exists(self.filename):
            fd = file(self.filename)
            for line in fd:
                line = line.rstrip()
                try:
                    (idChannel, msg) = line.split(':', 1)
                    (id, channel) = idChannel.split(',', 1)
                    id = int(id)
                except ValueError:
                    log.warning('Invalid line in HeraldDB: %r', line)
                    continue
                self.heralds[(id, channel)] = msg
            fd.close()

    def close(self):
        fd = file(self.filename, 'w')
        L = self.heralds.items()
        L.sort()
        for ((id, channel), msg) in L:
            fd.write('%s,%s:%s%s' % (id, channel, msg, os.linesep))
        fd.close()
        
    def getHerald(self, id, channel):
        return self.heralds[(id, channel)]

    def setHerald(self, id, channel, msg):
        self.heralds[(id, channel)] = msg

    def delHerald(self, id, channel):
        del self.heralds[(id, channel)]


class Herald(callbacks.Privmsg, configurable.Mixin):
    configurables = configurable.Dictionary(
        [('heralding', configurable.BoolType, True,
          """Determines whether messages will be sent to the channel when
             a recognized user joins; basically enables or disables the
             plugin."""),
         ('throttle-time', configurable.PositiveIntType, 600,
          """Determines the minimum number of seconds between heralds."""),
         ('throttle-after-part', configurable.IntType, 60,
          """Determines the minimum number of seconds after parting that the
          bot will not herald the person when he or she rejoins."""),]
    )
    def __init__(self):
        callbacks.Privmsg.__init__(self)
        configurable.Mixin.__init__(self)
        self.db = HeraldDB()
        self.lastParts = {}
        self.lastHerald = {}

    def die(self):
        self.db.close()
        callbacks.Privmsg.die(self)
        configurable.Mixin.die(self)

    def doJoin(self, irc, msg):
        channel = msg.args[0]
        if self.configurables.get('heralding', channel):
            try:
                id = ircdb.users.getUserId(msg.prefix)
                herald = self.db.getHerald(id, channel)
            except KeyError:
                return
            now = time.time()
            throttle = self.configurables.get('throttle-time', channel)
            if now - self.lastHerald.get((id, channel), 0) > throttle:
                if (id, channel) in self.lastParts:
                   i = self.configurables.get('throttle-after-part', channel) 
                   if now - self.lastParts[(id, channel)] < i:
                       return
                self.lastHerald[(id, channel)] = now
                irc.queueMsg(ircmsgs.privmsg(channel, herald))

    def doPart(self, irc, msg):
        try:
            id = self._getId(irc, msg.prefix)
            self.lastParts[(id, msg.args[0])] = 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 add(self, irc, msg, args):
        """[<channel>] <user|nick|hostmask> <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.
        """
        channel = privmsgs.getChannel(msg, args)
        (userNickHostmask, herald) = privmsgs.getArgs(args, required=2)
        try:
            id = self._getId(irc, userNickHostmask)
        except KeyError:
            irc.errorNoUser()
            return
        self.db.setHerald(id, channel, herald)
        irc.replySuccess()

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

        Removes the herald message set for <user>, or the user
        <nick|hostmask> is currently identified or recognized as.
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        channel = privmsgs.getChannel(msg, args)
        userNickHostmask = privmsgs.getArgs(args)
        try:
            id = self._getId(irc, userNickHostmask)
        except KeyError:
            irc.errorNoUser()
            return
        self.db.delHerald(id, channel)
        irc.replySuccess()


Class = Herald

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