Added support for MARK SSLCLIFP

[irc/evilnet/x3.git] / src / mod-python.c

/* mod-python.c - Script module for x3
 * Copyright 2003-2004 Martijn Smit and srvx Development Team
 * Copyright 2005-2006 X3 Development Team
 *
 * This file is part of x3.
 *
 * x3 is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with srvx; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */

#include "config.h"
#ifdef WITH_PYTHON /* just disable this file if python doesnt exist */

#ifndef WITH_PROTOCOL_P10
#error mod-python is only supported with p10 protocol enabled
#endif /* WITH_PROTOCOL_P10 */

#include <Python.h>
#include "chanserv.h"
#include "conf.h"
#include "modcmd.h"
#include "nickserv.h"
#include "opserv.h"
#include "saxdb.h"
#include "mail.h"
#include "timeq.h"
#include "compat.h"
#include "nickserv.h"

/* TODO notes
 *
 * - Implement most of proto-p10 irc_* commands for calling from scripts
 * - Implement functions to look up whois, channel, account, and reg-channel info for scripts
 * - Implement x3.conf settings for python variables like include path, etc.
 * - modpython.py calls for everything you can reg_ a handler for in x3
 * - Some kind of system for getting needed binds bound automagicaly to make it easier
 *   to run peoples' scripts and mod-python in general.
 * - An interface to reading/writing data to x3.db. Maybe generic, or attached to account or channel reg records?
 */

static const struct message_entry msgtab[] = {
    { "PYMSG_RELOAD_SUCCESS", "Reloaded Python scripts successfully." },
    { "PYMSG_RELOAD_FAILED", "Error reloading Python scripts." },
    { "PYMSG_RUN_UNKNOWN_EXCEPTION", "Error running python: unknown exception." },
    { "PYMSG_RUN_EXCEPTION", "Error running python: %s: %s." },
    { NULL, NULL } /* sentinel */
};

#define MODPYTHON_CONF_NAME "modules/python"

static
struct {
    char const* scripts_dir;
    char const* main_module;
} modpython_conf;

static struct log_type *PY_LOG;
const char *python_module_deps[] = { NULL };
static struct module *python_module;

PyObject *base_module = NULL; /* Base python handling library */
PyObject *handler_object = NULL; /* instance of handler class */


extern struct userNode *global, *chanserv, *opserv, *nickserv, *spamserv;

/*
Some hooks you can call from modpython.py to interact with the   
service. These emb_* functions are available as _svc.* in python. */

struct _tuple_dict_extra {
    PyObject* data;
    size_t* extra;
};

static void pyobj_release_tuple(PyObject* tuple, size_t n) {
    size_t i;

    if (tuple == NULL)
        return;

    for (i = 0; i < n; ++i)
        Py_XDECREF(PyTuple_GET_ITEM(tuple, i));

    Py_XDECREF(tuple);
}

static int _dict_iter_fill_tuple(char const* key, UNUSED_ARG(void* data), void* extra) {
    PyObject* tmp;
    struct _tuple_dict_extra* real_extra = (struct _tuple_dict_extra*)extra;

    if ((tmp = PyString_FromString(key)) == NULL)
        return 1;

    if (PyTuple_SetItem(real_extra->data, *(int*)real_extra->extra, tmp)) {
        Py_DECREF(tmp);
        return 1;
    }

    *real_extra->extra = *real_extra->extra + 1;
    return 0;
}

static PyObject*
pyobj_from_dict_t(dict_t d) {
    PyObject* retval;
    size_t n = 0;
    struct _tuple_dict_extra extra;

    if ((retval = PyTuple_New(dict_size(d))) == NULL)
        return NULL;

    extra.extra = &n;
    extra.data = retval;

    if (dict_foreach(d, _dict_iter_fill_tuple, (void*)&extra) != NULL) {
        pyobj_release_tuple(retval, n);
        return NULL;
    }

    return retval;
}

PyDoc_STRVAR(emb_get_users__doc__,
        "get_users() -> tuple with user nicks");

static PyObject*
emb_get_users(UNUSED_ARG(PyObject *self), PyObject *args) {
    if (!PyArg_ParseTuple(args, ""))
        return NULL;

    return pyobj_from_dict_t(clients);
}

PyDoc_STRVAR(emb_get_channels__doc__,
        "get_channels() -> tuple with channel names");

static PyObject*
emb_get_channels(UNUSED_ARG(PyObject* self), PyObject* args) {
    if (!PyArg_ParseTuple(args, ""))
        return NULL;

    return pyobj_from_dict_t(channels);
}

PyDoc_STRVAR(emb_get_servers__doc__,
        "get_servers() -> tuple with server names");

static PyObject*
emb_get_servers(UNUSED_ARG(PyObject* self), PyObject* args) {
    if (!PyArg_ParseTuple(args, ""))
        return NULL;

    return pyobj_from_dict_t(servers);
}

PyDoc_STRVAR(emb_get_accounts__doc__,
        "get_accounts() -> tuple with all nickserv account names");

static PyObject*
emb_get_accounts(UNUSED_ARG(PyObject* self), PyObject* args) {
    if (!PyArg_ParseTuple(args, ""))
        return NULL;

    return pyobj_from_dict_t(nickserv_handle_dict);
}

PyDoc_STRVAR(emb_dump__doc__,
        "dump(dump) -> an integer detailing success\n\n"
        "Dumps a string to the server socket for propagation to other servers.\n\n"
        "Return value is 1 on success and 0 on failure.\n");

static PyObject*
emb_dump(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* Dump a raw string into the socket 
        usage: _svc.dump(<P10 string>)
    */
    char *buf;
    int ret = 0;
    char linedup[MAXLEN];


    if(!PyArg_ParseTuple(args, "s:dump", &buf ))
        return NULL;

    safestrncpy(linedup, buf, sizeof(linedup));

    if(parse_line(linedup, 1)) {
        irc_raw(buf);
        ret = 1;
    } else {
        PyErr_SetString(PyExc_Exception, "invalid protocol message");
        return NULL;
    }

    return Py_BuildValue("i", ret);
}

PyDoc_STRVAR(emb_send_target_privmsg__doc__,
        "send_target_privmsg(servicenick, target, message) -> amount of message sent");

static PyObject*
emb_send_target_privmsg(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* Send a privmsg 
        usage: _svc.send_target_privmsg(<servicenick_from>, <nick_to>, <message>)
    */
    int ret = 0;
    char *servicenick;
    char *channel;
    char *buf;

    struct service *service;


    if(!PyArg_ParseTuple(args, "sss:reply", &servicenick, &channel, &buf ))
        return NULL;

    if (buf == NULL || strlen(buf) == 0) {
        PyErr_SetString(PyExc_Exception, "invalid empty message");
        return NULL;
    }

    if(!(service = service_find(servicenick))) {
        PyErr_SetString(PyExc_Exception, "no such service nick");
        return NULL;
    }

    ret = send_target_message(5, channel, service->bot, "%s", buf);
    return Py_BuildValue("i", ret);
}

PyDoc_STRVAR(emb_send_target_notice__doc__,
        "send_target_notice(servicenick, target, message) -> amount of message sent");

static PyObject*
emb_send_target_notice(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* send a notice
        usage: _svc.send_target_notice(<servicenick_from>, <nick_to>, <message>)
    */
    int ret = 0;
    char *servicenick;
    char *target;
    char *buf;

    struct service *service;

    if(!PyArg_ParseTuple(args, "sss:reply", &servicenick, &target, &buf ))
        return NULL;

    if (buf == NULL || strlen(buf) == 0) {
        PyErr_SetString(PyExc_Exception, "invalid empty message");
        return NULL;
    }

    if(!(service = service_find(servicenick))) {
        PyErr_SetString(PyExc_Exception, "no such service nick");
        return NULL;
    }

    ret = send_target_message(4, target, service->bot, "%s", buf);

    return Py_BuildValue("i", ret);
}

static PyObject*
pyobj_from_usernode(struct userNode* user) {
    unsigned int n;
    struct modeNode *mn;
    PyObject* retval = NULL;
    PyObject* pChanList = PyTuple_New(user->channels.used);

    if (pChanList == NULL)
        return NULL;

    for (n=0; n < user->channels.used; n++) {
        mn = user->channels.list[n];
        if (PyTuple_SetItem(pChanList, n, Py_BuildValue("s", mn->channel->name)))
            goto cleanup;
    }

    retval = Py_BuildValue("{"
            "s: s, " /* nick */
            "s: s, " /* ident */
            "s: s, " /* info */
            "s: s, " /* hostname */
            "s: s, " /* ip */
            "s: s, " /* fakehost */
            "s: s, " /* sethost */
            "s: s, " /* crypthost */
            "s: s, " /* cryptip */
            "s: s, " /* numeric */
            "s: i, " /* loc */
            "s: i, " /* no_notice */
            "s: s, " /* mark */
            "s: s, " /* version_reply */
            "s: s, " /* account */
            "s: O}", /* channels */
            "nick", user->nick,
            "ident", user->ident,
            "info", user->info,
            "hostname", user->hostname,
            "ip", irc_ntoa(&user->ip),
            "fakehost", user->fakehost,
            "sethost", user->sethost,
            "crypthost", user->crypthost,
            "cryptip", user->cryptip,
            "numeric", user->numeric,
            "loc", user->loc,
            "no_notice", user->no_notice,
            "mark", user->mark,
            "version_reply", user->version_reply,
            "account", user->handle_info ? user->handle_info->handle : NULL,
            "channels", pChanList);

    if (retval == NULL)
        goto cleanup;

    return retval;

cleanup:
    Py_XDECREF(retval);
    pyobj_release_tuple(pChanList, n);

    return NULL;
}

PyDoc_STRVAR(emb_get_user__doc__,
        "get_user(nick) -> dict with user information\n\n"
        "Updating the returned dictionary will not be reflected in the user's\n"
        "information.");

static PyObject*
emb_get_user(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* Get a python object containing everything x3 knows about a user, by nick.
        usage: _svc.get_user(<nick>)
    */
    char const* nick;
    struct userNode *user;

    if(!PyArg_ParseTuple(args, "s", &nick))
        return NULL;

    if(!(user = GetUserH(nick))) {
        PyErr_SetString(PyExc_Exception, "no such user");
        return NULL;
    }

    return pyobj_from_usernode(user);
}

static PyObject*
pyobj_from_server(struct server* srv) {
    size_t n, idx;
    PyObject* tmp = NULL;
    PyObject* retval = NULL;
    PyObject* users = PyTuple_New(srv->clients);

    if (users == NULL)
        return NULL;

    idx = 0;
    for (n = 0; n < srv->num_mask; ++n) {
        if (srv->users[n] == NULL)
            continue;

        tmp = PyString_FromString(srv->users[n]->nick);
        if (tmp == NULL)
            goto cleanup;

        if (PyTuple_SetItem(users, idx++, tmp))
            goto cleanup;
    }

    retval = Py_BuildValue("{"
            "s:s," /* name */
            "s:l," /* boot */
            "s:l," /* link_time */
            "s:s," /* description */
            "s:s," /* numeric */
            "s:I," /* num_mask */
            "s:I," /* hops */
            "s:I," /* clients */
            "s:I," /* max_clients */
            "s:I," /* burst */
            "s:I," /* self_burst */
            "s:s" /* uplink */
            "s:O" /* users */
            /* TODO: Children */
            "}",
            "name", srv->name,
            "boot", srv->boot,
            "link_time", srv->link_time,
            "description", srv->description,
            "numeric", srv->numeric,
            "num_mask", srv->num_mask,
            "hops", srv->hops,
            "clients", srv->clients,
            "max_clients", srv->max_clients,
            "burst", srv->burst,
            "self_burst", srv->self_burst,
            "uplink", srv->uplink ? srv->uplink->name : NULL,
            "users", users
            );

    if (retval == NULL)
        goto cleanup;

    return retval;

cleanup:
    Py_XDECREF(retval);
    pyobj_release_tuple(users, idx);

    return NULL;
}

PyDoc_STRVAR(emb_get_server__doc__,
        "get_server(name) -> dict with information\n\n"
        "Changes made to the returned dictionary will not reflect in the server's\n"
        "information.");

static PyObject*
emb_get_server(UNUSED_ARG(PyObject* self), PyObject* args) {
    struct server* srv;
    char const* name;

    if (!PyArg_ParseTuple(args, "s", &name))
        return NULL;

    if (name == NULL || strlen(name) == 0) {
        PyErr_SetString(PyExc_Exception, "invalid server name");
        return NULL;
    }

    if ((srv = GetServerH(name)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown server");
        return NULL;
    }

    return pyobj_from_server(srv);
}

static PyObject*
pyobj_from_modelist(struct modeList* mode) {
    size_t n;
    PyObject* tmp;
    PyObject* retval = PyTuple_New(mode->used);

    if (retval == NULL)
        return NULL;

    for (n = 0; n < mode->used; ++n) {
        struct modeNode* mn = mode->list[n];
        tmp = PyString_FromString(mn->user->nick);
        if (tmp == NULL) {
            pyobj_release_tuple(retval, n);
            return NULL;
        }

        if (PyTuple_SetItem(retval, n, tmp)) {
            pyobj_release_tuple(retval, n);
            return NULL;
        }
    }

    return retval;
}

static PyObject*
pyobj_from_banlist(struct banList* bans) {
    size_t n;
    struct banNode* bn;
    PyObject* tmp;
    PyObject* retval = PyTuple_New(bans->used);

    if (retval == NULL)
        return NULL;

    for (n = 0; n < bans->used; ++n) {
        bn = bans->list[n];

        tmp = Py_BuildValue("{s:s,s:s,s:l}",
                "ban", bn->ban, "who", bn->who, "set", bn->set);

        if (tmp == NULL || PyTuple_SetItem(retval, n, tmp)) {
            pyobj_release_tuple(retval, n);
            return NULL;
        }
     }

    return retval;
}

static PyObject*
pyobj_from_exemptlist(struct exemptList* exmp) {
    size_t n;
    struct exemptNode* en;
    PyObject* tmp;
    PyObject* retval = PyTuple_New(exmp->used);

    if (retval == NULL)
        return NULL;

    for (n = 0; n < exmp->used; ++n) {
        en = exmp->list[n];

        tmp = Py_BuildValue("{s:s,s:s,s:l}",
                "ban", en->exempt, "who", en->who, "set", en->set);

        if (tmp == NULL || PyTuple_SetItem(retval, n, tmp)) {
            pyobj_release_tuple(retval, n);
            return NULL;
        }
    }

    return retval;
}

static PyObject*
pyobj_from_channode(struct chanNode* channel) {
    PyObject *pChannelMembers = NULL;
    PyObject *pChannelBans = NULL;
    PyObject *pChannelExempts = NULL;
    PyObject *retval = NULL;

    /* build tuple of nicks in channel */
    pChannelMembers = pyobj_from_modelist(&channel->members);
    if (pChannelMembers == NULL)
        goto cleanup;

    /* build tuple of bans */
    pChannelBans = pyobj_from_banlist(&channel->banlist);
    if (pChannelBans == NULL)
        goto cleanup;

    /* build tuple of exempts */
    pChannelExempts = pyobj_from_exemptlist(&channel->exemptlist);
    if (pChannelExempts == NULL)
        goto cleanup;

    retval = Py_BuildValue("{s:s,s:s,s:s,s:i"
                         ",s:i,s:i,s:O,s:O,s:O}",

                         "name", channel->name,
                         "topic", channel->topic,
                         "topic_nick", channel->topic_nick,
                         "topic_time", channel->topic_time,

                         "timestamp", channel->timestamp,
                         "modes", channel->modes,
                         "members", pChannelMembers,
                         "bans", pChannelBans,
                         "exempts", pChannelExempts
            );
    if (retval == NULL)
        goto cleanup;

    return retval;

cleanup:
    Py_XDECREF(retval);
    pyobj_release_tuple(pChannelExempts, channel->exemptlist.used);
    pyobj_release_tuple(pChannelBans, channel->banlist.used);
    pyobj_release_tuple(pChannelMembers, channel->members.used);

    return NULL;
}

PyDoc_STRVAR(emb_get_channel__doc__,
        "get_channel(channel) -> dict with channel information\n\n"
        "Updates made to the returned dictionary does not reflect in the channel\n"
        "information.");

static PyObject*
emb_get_channel(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* Returns a python dict object with all sorts of info about a channel.
          usage: _svc.get_channel(<name>)
    */
    char *name;
    struct chanNode *channel;

    if(!PyArg_ParseTuple(args, "s", &name))
        return NULL;

    if(!(channel = GetChannel(name))) {
        PyErr_SetString(PyExc_Exception, "unknown channel");
        return NULL;
    }

    return pyobj_from_channode(channel);
}

PyDoc_STRVAR(emb_get_account__doc__,
        "get_account(account) -> dict with account information\n\n"
        "Changes made to the returned dictionary will not be reflected in the\n"
        "account's information.");

static PyObject*
emb_get_account(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* Returns a python dict object with all sorts of info about an account.
        usage: _svc.get_account(<account name>)
    */
    char *name;
    struct handle_info *hi;


    if(!PyArg_ParseTuple(args, "s", &name))
        return NULL;

    hi = get_handle_info(name);

    if(!hi) {
        PyErr_SetString(PyExc_Exception, "unknown account name");
        return NULL;
    }

    return Py_BuildValue("{s:s,s:i,s:s,s:s,s:s"
                         ",s:s,s:s}",
                            
                          "account", hi->handle,
                          "registered", hi->registered,
                          "last_seen", hi->lastseen,
                          "infoline",  hi->infoline ? hi->infoline : "",
                          "email", hi->email_addr ? hi->email_addr : "",
                          
                          "fakehost", hi->fakehost ? hi->fakehost : "",
                          "last_quit_host", hi->last_quit_host
                          
                          /* TODO: */
                          /* users online authed to this account */
                          /* cookies */
                          /* nicks (nickserv nets only?) */
                          /* masks */
                          /* ignores */
                          /* channels */
                           );
}

PyDoc_STRVAR(emb_get_info__doc__,
        "get_info() -> dict with general service setup information\n\n"
        "The dictionary contains the nicks of the different services.");

static PyObject*
emb_get_info(UNUSED_ARG(PyObject *self), UNUSED_ARG(PyObject *args))
{
    /* return some info about the general setup
     * of X3, such as what the chanserv's nickname
     * is.
     */


    return Py_BuildValue("{s:s,s:s,s:s,s:s,s:s}",
                          "chanserv", chanserv? chanserv->nick : "ChanServ",
                          "nickserv", nickserv?nickserv->nick : "NickServ",
                          "opserv", opserv?opserv->nick : "OpServ",
                          "global", global?global->nick : "Global",
                          "spamserv", spamserv?spamserv->nick : "SpamServ");
}

PyDoc_STRVAR(emb_log_module__doc__,
        "log_module(level, message)\n\n"
        "Logs a message in the PY_LOG subsystem given a severity level and a message.");

static PyObject*
emb_log_module(UNUSED_ARG(PyObject *self), PyObject *args)
{
    /* a gateway to standard X3 logging subsystem.
     * level is a value 0 to 9 as defined by the log_severity enum in log.h.
     *
     * for now, all logs go to the PY_LOG log. In the future this will change.
     */
    char *message;
    int level;

    if(!PyArg_ParseTuple(args, "is", &level, &message))
        return NULL;

    log_module(PY_LOG, level, "%s", message);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_kill__doc__,
        "kill(servicenick, target, message)\n\n"
        "Kills a given user.");

static PyObject*
emb_kill(UNUSED_ARG(PyObject* self), PyObject* args) {
    char const* from_nick, *target_nick, *message;
    struct userNode *target;
    struct service *service;

    if (!PyArg_ParseTuple(args, "sss", &from_nick, &target_nick, &message))
        return NULL;

    if(!(service = service_find(from_nick))) {
        PyErr_SetString(PyExc_Exception, "unknown service user specified as from user");
        return NULL;
    }

    if ((target = GetUserH(target_nick)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown target user");
        return NULL;
    }

    irc_kill(service->bot, target, message);

    Py_INCREF(Py_None);
    return Py_None;
}

struct py_timeq_extra {
    PyObject* func;
    PyObject* arg;
};

static 
void py_timeq_callback(void* data) {
    struct py_timeq_extra* extra = (struct py_timeq_extra*)data;

    PyObject* retval = PyObject_Call(extra->func, extra->arg, NULL);
    Py_XDECREF(retval);

    Py_DECREF(extra->func);
    Py_DECREF(extra->arg);
}

PyDoc_STRVAR(emb_timeq_add__doc__,
        "timeq_add(when, function, args)\n\n"
        "Adds a callback to the service timer system.\n\n"
        "The specific function must be callable, and the specified arguments must be\n"
        "a tuple with the arguments that the function expects.");

static PyObject*
emb_timeq_add(UNUSED_ARG(PyObject* self), PyObject* args) {
    time_t when;
    PyObject* func, *arg;
    struct py_timeq_extra* extra;

    if (!PyArg_ParseTuple(args, "lOO", &when, &func, &arg))
        return NULL;

    if (!PyFunction_Check(func)) {
        PyErr_SetString(PyExc_Exception, "first argument must be a function");
        return NULL;
    }

    if (!PyTuple_Check(arg)) {
        PyErr_SetString(PyExc_Exception, "second argument must be a tuple");
        return NULL;
    }

    extra = malloc(sizeof(struct py_timeq_extra));
    if (extra == NULL) {
        PyErr_SetString(PyExc_Exception, "out of memory");
        return NULL;
    }

    Py_INCREF(func);
    Py_INCREF(arg);

    extra->func = func;
    extra->arg = arg;

    timeq_add(when, py_timeq_callback, (void*)extra);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_timeq_del__doc__,
        "timeq_del(when)\n\n"
        "This function deletes all python-added callbacks registered to run at the\n"
        "given time, regardless of their data. This is due to the unnecessary extra\n"
        "burden it would require to get the same data for multiple runs.");

static PyObject*
emb_timeq_del(UNUSED_ARG(PyObject* self), PyObject* args) {
    time_t when;

    if (!PyArg_ParseTuple(args, "l", &when))
        return NULL;

    timeq_del(when, py_timeq_callback, NULL, TIMEQ_IGNORE_DATA);

    Py_INCREF(Py_None);
    return Py_None;
}

static int pyobj_config_make_dict(char const* key, void* data_, void* extra) {
    struct record_data* data = (struct record_data*)data_;
    PyObject* dict = (PyObject*)extra;
    PyObject* value = NULL, *tmp;
    size_t n, idx;
    int success;

    switch (data->type) {
        case RECDB_QSTRING:
            value = PyString_FromString(data->d.qstring);
            break;

        case RECDB_STRING_LIST:
            value = PyList_New(data->d.slist->used);
            if (value == NULL)
                break;

            success = 1;
            for (n = 0; n < data->d.slist->used; ++n) {
                tmp = PyString_FromString(data->d.slist->list[n]);
                if (tmp == NULL) {
                    success = 0;
                    break;
                }

                if (PyList_SetItem(value, n, tmp)) {
                    Py_DECREF(tmp);
                    success = 0;
                    break;
                }
            }
            if (!success) {
                for (idx = 0; idx < n; ++idx) {
                    tmp = PyList_GET_ITEM(value, idx);
                    Py_DECREF(tmp);
                    PyList_SET_ITEM(value, idx, NULL);
                }
                Py_DECREF(value);
                value = NULL;
            }
            break;

        case RECDB_OBJECT:
            value = PyDict_New();
            if (value == NULL)
                break;

            if (dict_foreach(data->d.object, pyobj_config_make_dict, (void*)value) != NULL) {
                PyDict_Clear(value);
                value = NULL;
                break;
            }

            break;

        default:
            Py_INCREF(Py_None);
            value = Py_None;
    }

    if (value == NULL)
        return 1;

    if (PyDict_SetItemString(dict, key, value))
        return 1;

    return 0;
}

PyDoc_STRVAR(emb_get_config__doc__,
        "get_config() -> dict with config elements and values\n\n"
        "Updates to the returned dictionary will not reflect in the service's\n"
        "configuration.");

static PyObject*
emb_get_config(UNUSED_ARG(PyObject* self), PyObject* args) {
    PyObject* dict;

    if (!PyArg_ParseTuple(args, ""))
        return NULL;

    dict = PyDict_New();
    if (dict == NULL)
        return NULL;

    if (conf_enum_root(pyobj_config_make_dict, (void*)dict) != NULL) {
        PyDict_Clear(dict);
        PyErr_SetString(PyExc_Exception, "unable to iterate config");
        return NULL;
    }

    return dict;
}

PyDoc_STRVAR(emb_kick__doc__,
        "kick(who, target, message)\n\n"
        "Kicks a given target as if the who user kicked them using the given message.");

static PyObject* emb_kick(UNUSED_ARG(PyObject* self), PyObject* args) {
    struct userNode* who, *target;
    struct chanNode* channel;
    char const* msg;

    char const* who_s, *target_s, *channel_s;

    if (!PyArg_ParseTuple(args, "ssss", &who_s, &target_s, &channel_s, &msg))
        return NULL;

    if ((who = GetUserH(who_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "no such user");
        return NULL;
    }

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "no such target");
        return NULL;
    }

    if ((channel = GetChannel(channel_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "no such channel");
        return NULL;
    }

    irc_kick(who, target, channel, msg);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_channel_mode__doc__,
        "channel_mode(who, channel, modes)\n\n"
        "Lets a current server's user set a specified channel's modes as specified.");

static PyObject* emb_channel_mode(UNUSED_ARG(PyObject* self_), PyObject* args) {
    struct userNode* who;
    struct chanNode* channel;
    char const* modes;

    char const* who_s, *channel_s;

    if (!PyArg_ParseTuple(args, "sss", &who_s, &channel_s, &modes))
        return NULL;

    if ((who = GetUserH(who_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown user");
        return NULL;
    }

    if (who->uplink != self) {
        PyErr_SetString(PyExc_Exception, "user not on current server");
        return NULL;
    }

    if ((channel = GetChannel(channel_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown channel");
        return NULL;
    }

    irc_mode(who, channel, modes);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_user_mode__doc__,
        "user_mode(target, modes)\n\n"
        "Sets target's modes as specified. The modes are in normal +f-n syntax.");

static PyObject* emb_user_mode(UNUSED_ARG(PyObject* self), PyObject* args) {
    struct userNode* target;
    char const* modes;

    char const* target_s;

    if (!PyArg_ParseTuple(args, "ss", &target_s, &modes))
        return NULL;

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown user");
        return NULL;
    }

    irc_umode(target, modes);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_fakehost__doc__,
        "fakehost(target, host)\n\n"
        "Sets the fakehost of a given user to the specified host.");

static PyObject* emb_fakehost(UNUSED_ARG(PyObject* self), PyObject* args) {
    struct userNode* target;
    char const* host;

    char const* target_s;

    if (!PyArg_ParseTuple(args, "ss", &target_s, &host))
        return NULL;

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown user");
        return NULL;
    }

    irc_fakehost(target, host);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_svsnick__doc__,
        "svsnick(from, target, newnick)\n\n"
        "The from nick must be on the service server.");

static PyObject*
emb_svsnick(UNUSED_ARG(PyObject* self_), PyObject* args) {
    struct userNode* from, *target;
    const char* newnick;

    const char* from_s, *target_s;

    if (!PyArg_ParseTuple(args, "sss", &from_s, &target_s, &newnick))
        return NULL;

    if ((from = GetUserH(from_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown from user");
        return NULL;
    }

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown target user");
        return NULL;
    }

    if (from->uplink != self) {
        PyErr_SetString(PyExc_Exception, "from user is not on service server");
        return NULL;
    }

    irc_svsnick(from, target, newnick);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_svsquit__doc__,
        "svsquit(from, target, reason)\n\n"
        "The from user must be on the service server.");

static PyObject*
emb_svsquit(UNUSED_ARG(PyObject* self_), PyObject* args) {
    struct userNode* from, *target;
    char const* reason;

    char const* from_s, *target_s;

    if (!PyArg_ParseTuple(args, "sss", &from_s, &target_s, &reason))
        return NULL;

    if ((from = GetUserH(from_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown from user");
        return NULL;
    }

    if (from->uplink != self) {
        PyErr_SetString(PyExc_Exception, "from user is not on service server");
        return NULL;
    }

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown target user");
        return NULL;
    }

    irc_svsquit(from, target, reason);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_svsjoin__doc__,
        "svsjoin(from, target, to)\n\n"
        "From user from must a user on the service server.\n"
        "To must be an existing channel name.");

static PyObject*
emb_svsjoin(UNUSED_ARG(PyObject* self_), PyObject* args) {
    struct userNode* from, *target;
    struct chanNode* to;

    const char* from_s, *target_s, *to_s;

    if (!PyArg_ParseTuple(args, "sss", &from_s, &target_s, &to_s))
        return NULL;

    if ((from = GetUserH(from_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown from user");
        return NULL;
    }

    if (from->uplink != self) {
        PyErr_SetString(PyExc_Exception, "from user is not on service server");
        return NULL;
    }

    if ((target = GetUserH(target_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown target user");
        return NULL;
    }

    if ((to = GetChannel(to_s)) == NULL)
        to = AddChannel(to_s, now, NULL, NULL, NULL);

    irc_svsjoin(from, target, to);

    Py_INCREF(Py_None);
    return Py_None;
}

PyDoc_STRVAR(emb_adduser__doc__,
        "adduser(nick, ident, hostname, description, modes) -> dict with user information\n\n"
        "Adds a new local user with the given information.");

static PyObject*
emb_adduser(UNUSED_ARG(PyObject* self_), PyObject* args) {
    char const* nick, *ident, *hostname, *desc, *modes;
    struct userNode* user;
    PyObject* retval;

    if (!PyArg_ParseTuple(args, "sssss", &nick, &ident, &hostname, &desc, &modes))
        return NULL;

    user = AddLocalUser(nick, ident, hostname, desc, modes);

    retval = pyobj_from_usernode(user);

    return retval;
}

/* TODO: Add the rest of the service members to the dict */
static PyObject*
pyobj_from_service(struct service* serv) {
    PyObject* bot, *retval;
   
    bot = pyobj_from_usernode(serv->bot);
    if (bot == NULL)
        goto cleanup;

    retval = Py_BuildValue("{s:O,s:c,s:I}",
            "bot", bot,
            "trigger", serv->trigger,
            "privileged", serv->privileged);
    if (retval == NULL)
        goto cleanup;

    return retval;

cleanup:
    Py_XDECREF(bot);
    return NULL;
}

PyDoc_STRVAR(emb_service_register__doc__,
        "service_register(nick)\n\n"
        "Registers nick as a service. The specified nick must be on the local server.");

static PyObject*
emb_service_register(UNUSED_ARG(PyObject* self_), PyObject* args) {
    struct userNode* user;
    char const* user_s;

    if (!PyArg_ParseTuple(args, "s", &user_s))
        return NULL;

    if ((user = GetUserH(user_s)) == NULL) {
        PyErr_SetString(PyExc_Exception, "unknown user");
        return NULL;
    }

    if (user->uplink != self) {
        PyErr_SetString(PyExc_Exception, "user is not on service server");
        return NULL;
    }

    return pyobj_from_service(service_register(user));
}

static PyMethodDef EmbMethods[] = {
    /* Communication methods */
    {"dump", emb_dump, METH_VARARGS, emb_dump__doc__},
    {"send_target_privmsg", emb_send_target_privmsg, METH_VARARGS, emb_send_target_privmsg__doc__},
    {"send_target_notice", emb_send_target_notice, METH_VARARGS, emb_send_target_notice__doc__},
    {"log_module", emb_log_module, METH_VARARGS, emb_log_module__doc__},
//TODO:    {"exec_cmd", emb_exec_cmd, METH_VARARGS, "execute x3 command provided"},
//          This should use environment from "python command" call to pass in, if available
    {"kill", emb_kill, METH_VARARGS, emb_kill__doc__},
    {"fakehost", emb_fakehost, METH_VARARGS, emb_fakehost__doc__},
    {"svsnick", emb_svsnick, METH_VARARGS, emb_svsnick__doc__},
    {"svsquit", emb_svsquit, METH_VARARGS, emb_svsquit__doc__},
    {"svsjoin", emb_svsjoin, METH_VARARGS, emb_svsjoin__doc__},
    {"adduser", emb_adduser, METH_VARARGS, emb_adduser__doc__},
    {"service_register", emb_service_register, METH_VARARGS, emb_service_register__doc__},
//TODO: svsmode, svsident, nick, quit, join, part, ident, vhost
//TODO:    {"shun"
//TODO:    {"unshun"
//TODO:    {"gline", emb_gline, METH_VARARGS, "gline a mask"},
//TODO:    {"ungline", emb_ungline, METH_VARARGS, "remove a gline"},
    {"kick", emb_kick, METH_VARARGS, emb_kick__doc__},
    {"channel_mode", emb_channel_mode, METH_VARARGS, emb_channel_mode__doc__},
    {"user_mode", emb_user_mode, METH_VARARGS, emb_user_mode__doc__},
//
    {"get_config", emb_get_config, METH_VARARGS, emb_get_config__doc__},
//TODO:    {"config_set", emb_config_set, METH_VARARGS, "change a config setting 'on-the-fly'."},
//
    {"timeq_add", emb_timeq_add, METH_VARARGS, emb_timeq_add__doc__},
    {"timeq_del", emb_timeq_del, METH_VARARGS, emb_timeq_del__doc__},

    /* Information gathering methods */
    {"get_user", emb_get_user, METH_VARARGS, emb_get_user__doc__},
    {"get_users", emb_get_users, METH_VARARGS, emb_get_users__doc__},
    {"get_channel", emb_get_channel, METH_VARARGS, emb_get_channel__doc__},
    {"get_channels", emb_get_channels, METH_VARARGS, emb_get_channels__doc__},
    {"get_server", emb_get_server, METH_VARARGS, emb_get_server__doc__},
    {"get_servers", emb_get_servers, METH_VARARGS, emb_get_servers__doc__},
    {"get_account", emb_get_account, METH_VARARGS, emb_get_account__doc__},
    {"get_accounts", emb_get_accounts, METH_VARARGS, emb_get_accounts__doc__},
    {"get_info", emb_get_info, METH_VARARGS, emb_get_info__doc__},
    /* null terminator */
    {NULL, NULL, 0, NULL}
};


/*
These functions set up the embedded environment for us to call out to
modpython.py class methods.  
 */

void python_log_module() {
    /* Attempt to convert python errors to x3 log system */
    PyObject *exc, *tb, *value, *tmp;
    char *str_exc = "NONE";
    char *str_value = "NONE";
    char *str_tb = "NONE";

    PyErr_Fetch(&exc, &value, &tb);

    if(exc) {
        if((tmp = PyObject_Str(exc)))
            str_exc = PyString_AsString(tmp);
    }
    if(value) {
        if((tmp = PyObject_Str(value)))
            str_value = PyString_AsString(tmp);
    }
    if(tb) {
        if((tmp = PyObject_Str(tb)))
            str_tb = PyString_AsString(tmp);
    }

    /* Now restore it so we can print it (just in case) 
     *   (should we do this only when running in debug mode?) */
    PyErr_Restore(exc, value, tb);
    PyErr_Print(); /* which of course, clears it again.. */

    log_module(PY_LOG, LOG_WARNING, "PYTHON error: %s, value: %s", str_exc, str_value);

    /* TODO: get the traceback using the traceback module via C api so we can add it to the X3 logs. See
     * http://mail.python.org/pipermail/python-list/2003-March/192226.html */
    // (this doesnt work, str_tb is just an object hashid) log_module(PY_LOG, LOG_INFO, "PYTHON error, traceback: %s", str_tb);
}


PyObject *python_build_handler_args(size_t argc, char *args[], PyObject *pIrcObj) {
    /* Sets up a python tuple with passed in arguments, prefixed by the Irc instance
       which handlers use to interact with C.
        argc = number of args
        args = array of args
        pIrcObj = instance of the irc class
    */
    size_t i = 0, n;
    PyObject *pArgs = NULL;

    pArgs = PyTuple_New(argc + 1);
    Py_INCREF(pIrcObj);
    PyTuple_SetItem(pArgs, i++, pIrcObj);

    if(args && argc) {
        PyObject *pValue;
        for(n = 0; n < argc; ++n) {
            pValue = PyString_FromString(args[n]);
            if(!pValue) {
                Py_DECREF(pArgs);
                log_module(PY_LOG, LOG_INFO, "Unable to convert '%s' to python string", args[n]);
                return NULL;
            }
            PyTuple_SetItem(pArgs, n+i, pValue);
        }
    }
    return pArgs;
}

PyObject *python_build_args(size_t argc, char *args[]) {
    /* Builds the passed in arguments into a python argument tuple.
         argc = number of args
         args = array of args
    */
    size_t i;
    PyObject *pArgs = NULL;

    if(args && argc) {
        pArgs = PyTuple_New(argc);
        PyObject *pValue;
        for(i = 0; i< argc; ++i) {
            pValue = PyString_FromString(args[i]);
            if(!pValue) {
                Py_DECREF(pArgs);
                log_module(PY_LOG, LOG_INFO, "Unable to convert '%s' to python string", args[i]);
                return NULL;
            }
            PyTuple_SetItem(pArgs, i, pValue);
        }
    }
    return pArgs;
}


PyObject *new_irc_object(char *command_service, char *command_caller, char *command_target) {
    /* Creates a new instance of the irc class (from modpython.py) which is initalized
       with current environment details like which service were talking to.
         command_service = which service we are talking to, or empty string if none
         command_caller = nick of user generating message, or empty string if none
         command_target = If were reacting to something on a channel, this will
                          be set to the name of the channel. Otherwise empty
    */
    PyObject *pIrcArgs = NULL;
    PyObject *pIrcClass;
    PyObject *pIrcObj;

    log_module(PY_LOG, LOG_INFO, "Attempting to instanciate irc class; %s %s %s", command_service, command_caller, command_target);
    pIrcClass = PyObject_GetAttrString(base_module, "irc");
    /* pIrcClass is a new reference */
    if(pIrcClass && PyCallable_Check(pIrcClass)) {
        //size_t i;
        char *ircargs[] = {command_service, command_caller, command_target};
        //PyObject *pValue;

        pIrcArgs = python_build_args(3, ircargs);
        pIrcObj = PyObject_CallObject(pIrcClass, pIrcArgs);
        if(!pIrcObj) {
            log_module(PY_LOG, LOG_ERROR, "IRC Class failed to load");
            python_log_module();
            //PyErr_Print();
        }
        if(pIrcArgs != NULL)  {
           Py_DECREF(pIrcArgs);
        }
        Py_DECREF(pIrcClass);
        return pIrcObj;
    }
    else {
        /* need to free pIrcClass here if it WAS found but was NOT callable? */
        log_module(PY_LOG, LOG_ERROR, "Unable to find irc class");
        return NULL;
    }
}

int python_call_handler(char *handler, char *args[], size_t argc, char *command_service, char *command_caller, char *command_target) {
    /*  This is how we talk to modpython.c.  First a new instance of the irc class is created using these
        arguments to setup the current environment. Then the named method of the handler object is called
        with the givin arguments.
     */
    PyObject *pIrcObj;
    PyObject *pArgs;
    PyObject *pMethod;
    PyObject *pValue;

    log_module(PY_LOG, LOG_INFO, "attempting to call handler %s.", handler);
    if(base_module != NULL && handler_object != NULL) {
        pIrcObj = new_irc_object(command_service, command_caller, command_target);
        if(!pIrcObj) {
            log_module(PY_LOG, LOG_INFO, "Can't get irc object. Bailing.");
            return 0;
        }

        pArgs = python_build_handler_args(argc, args, pIrcObj);
        pMethod = PyObject_GetAttrString(handler_object, handler);
        if(pMethod && PyCallable_Check(pMethod)) {
            /* Call the method, with the arguments */
            pValue = PyObject_CallObject(pMethod, pArgs);
            if(pArgs) {
                Py_DECREF(pArgs);
            }
            if(pValue != NULL) {
                int ret;
                ret = PyInt_AsLong(pValue);
                if(ret == -1 && PyErr_Occurred()) {
                    //PyErr_Print();
                    log_module(PY_LOG, LOG_INFO, "error converting return value of handler %s to type long. ", handler);
                    python_log_module();
                    ret = 0;
                }
                log_module(PY_LOG, LOG_INFO, "handler %s was run successfully, returned %d.", handler, ret);
                Py_DECREF(pValue);
                Py_DECREF(pIrcObj);
                Py_DECREF(pMethod);
                return ret;
            }
            else {
                /* TODO: instead of print errors, get them as strings
                 * and deal with them with normal x3 log system. */
                log_module(PY_LOG, LOG_WARNING, "call to handler %s failed", handler);
                //PyErr_Print();
                python_log_module();
                Py_DECREF(pIrcObj);
                Py_DECREF(pMethod);
                return 0;
            }
        }
        else { /* couldn't find handler methed */
            Py_DECREF(pArgs);
            /* Free pMethod if it was found but not callable? */
            log_module(PY_LOG, LOG_ERROR, "Cannot find handler %s.", handler);
            return 0;

        }
    } 
    else { /* No base module.. no python? */
        log_module(PY_LOG, LOG_INFO, "Cannot handle %s, Python is not initialized.", handler);
        return 0;
    }
}

PyObject *python_new_handler_object() {
    /* Create a new instance of the handler class. 
       This is called during python initilization (or reload)
       and the result is saved and re-used.
    */
    PyObject *pHandlerClass, *pHandlerObj;

    log_module(PY_LOG, LOG_INFO, "Attempting to instanciate python class handler");
    pHandlerClass = PyObject_GetAttrString(base_module, "handler");
    /* Class is a new reference */
    if(pHandlerClass && PyCallable_Check(pHandlerClass)) {
        /*PyObject *pValue; */

        pHandlerObj = PyObject_CallObject(pHandlerClass, NULL);
        if(pHandlerObj != NULL) {
            log_module(PY_LOG, LOG_INFO, "Created new python handler object.");
            return pHandlerObj;
        }
        else {
            log_module(PY_LOG, LOG_ERROR, "Unable to instanciate handler object");
            //PyErr_Print();
            python_log_module();
            return NULL;
        }
    }
    else {
        log_module(PY_LOG, LOG_ERROR, "Unable to find handler class");
        //PyErr_Print();
        python_log_module();
        if(pHandlerClass) {
            Py_DECREF(pHandlerClass);
        }
        return NULL;
    }
}

/* ------------------------------------------------------------------------------- *
    Some gateway functions to convert x3 callbacks into modpython.py callbacks.
    Mostly we just build relevant args and call the proper handler method

   debate: do we just register these and check them in python
   for every one (slow?) or actually work out if a plugin needs
   it first? We will start by doing it every time.
 */
static int
python_handle_join(struct modeNode *mNode, UNUSED_ARG(void *extra))
{
    /* callback for handle_join events. 
    */
    struct userNode *user = mNode->user;
    struct chanNode *channel = mNode->channel;


    log_module(PY_LOG, LOG_INFO, "python module handle_join");
    if(!channel||!user) {
        log_module(PY_LOG, LOG_WARNING, "Python code got join without channel or user!");
        return 0;
    }
    else {
        char *args[] = {channel->name, user->nick};
        return python_call_handler("join", args, 2, "", "", "");
    }
}

static int
python_handle_server_link(struct server *server, UNUSED_ARG(void *extra))
{
    PyObject* srv = NULL;
    PyObject* funcname = NULL;
    PyObject* retval = NULL;
    char const* err = NULL;
    int i = 0;

    if (handler_object == NULL) {
        err = "No Python handler is allocated. Ignoring python_handle_server_link.";
        goto cleanup;
    }

    if (server == NULL) {
        err = "Python code got server link without server!";
        goto cleanup;
    }

    if ((srv = pyobj_from_server(server)) == NULL) {
        err = "Python code unable to get PyObject with server!";
        goto cleanup;
    }

    funcname = PyString_FromString("server_link");
    if (funcname == NULL) {
        err = "Unable to allocate memory";
        goto cleanup;
    }

    retval = PyObject_CallMethodObjArgs(handler_object, funcname, srv, NULL);
    if (retval == NULL) {
        err = "Error calling server_link handler";
        goto cleanup;
    }        

cleanup:
    Py_XDECREF(srv);
    Py_XDECREF(funcname);

    if (retval != NULL && PyInt_Check(retval))
        i = (int)PyInt_AsLong(retval);

    Py_XDECREF(retval);

    if (err != NULL)
        log_module(PY_LOG, LOG_WARNING, "%s", err);

    return i;
}

static int
python_handle_new_user(struct userNode *user, UNUSED_ARG(void *extra))
{
    PyObject* name = NULL;
    PyObject* usr = NULL;
    PyObject* retval = NULL;
    int i = 0;
    const char* err = NULL;

    if (handler_object == NULL) {
        err = "No Python handler is allocated. Ignoring python_handle_server_link.";
        goto cleanup;
    }

    if(!user) {
        log_module(PY_LOG, LOG_WARNING, "Python code got new_user without the user");
        return 0;
    }

    if ((usr = pyobj_from_usernode(user)) == NULL) {
        err = "unable to allocate python user information";
        goto cleanup;
    }

    name = PyString_FromString("new_user");
    if (name == NULL) {
        err = "unable to allocate memory for handler function name";
        goto cleanup;
    }

    if ((retval = PyObject_CallMethodObjArgs(handler_object, name, usr, NULL)) == NULL) {
        err = "error calling new_user handler";
        goto cleanup;
    }

cleanup:
    Py_XDECREF(usr);
    Py_XDECREF(name);

    if (retval != NULL && PyInt_Check(retval))
        i = (int)PyInt_AsLong(retval);

    Py_XDECREF(retval);

    if (err != NULL)
        log_module(PY_LOG, LOG_WARNING, "%s", err);

    return i;
}

static void
python_handle_nick_change(struct userNode *user, const char *old_nick, UNUSED_ARG(void *extra))
{
    PyObject* usr = NULL;
    PyObject* name = NULL;
    PyObject* oldnick = NULL;
    PyObject* retval = NULL;
    char const* err = NULL;

    if (handler_object == NULL) {
        err = "No Python handler is allocated. Ignoring python_handle_server_link.";
        goto cleanup;
    }

    if (user == NULL) {
        err = "Python code got nick_change without the user!";
        goto cleanup;
    }

    if ((usr = pyobj_from_usernode(user)) == NULL) {
        err = "unable to allocate Python usernode";
        goto cleanup;
    }

    name = PyString_FromString("nick_change");
    if (name == NULL) {
        err = "unable to allocate memory for handler function name";
        goto cleanup;
    }

    oldnick = PyString_FromString(old_nick);

    retval = PyObject_CallMethodObjArgs(handler_object, name, usr, oldnick, NULL);
    if (retval == NULL) {
        err = "error calling nick_change handler";
        goto cleanup;
    }

cleanup:
    Py_XDECREF(usr);
    Py_XDECREF(name);
    Py_XDECREF(oldnick);
    Py_XDECREF(retval);

    if (err != NULL)
        log_module(PY_LOG, LOG_WARNING, "%s", err);
}

void python_handle_del_user(struct userNode *user, struct userNode *killer, const char *why, UNUSED_ARG(void *extra)) {
    PyObject *usr = NULL, *killr = NULL, *name = NULL;
    PyObject *reason = NULL, *retval = NULL;
    char const* err = NULL;

    if (handler_object == NULL) {
        err = "No Python handler is allocated. Ignoring python_handle_server_link.";
        goto cleanup;
    }

    if (user == NULL) {
        Py_INCREF(Py_None);
        usr = Py_None;
    } else {
        usr = pyobj_from_usernode(user);
        if (usr == NULL) {
            err = "unable to allocate usernode for user";
            goto cleanup;
        }
    }

    if (killer == NULL) {
        Py_INCREF(Py_None);
        killr = Py_None;
    } else {
        killr = pyobj_from_usernode(killer);
        if (killr == NULL) {
            err = "unable to allocate usernode for killer";
            goto cleanup;
        }
    }

    if (why == NULL) {
        Py_INCREF(Py_None);
        reason = Py_None;
    } else {
        reason = PyString_FromString(why);
        if (reason == NULL) {
            err = "unable to allocate memory for reason";
            goto cleanup;
        }
    }

    name = PyString_FromString("del_user");
    if (name == NULL) {
        err = "unable to allocate memory for handler function name";
        goto cleanup;
    }

    retval = PyObject_CallMethodObjArgs(handler_object, name, usr, killr, reason, NULL);
    if (retval == NULL) {
        err = "error calling del_user handler";
        goto cleanup;
    }

cleanup:
    Py_XDECREF(usr);
    Py_XDECREF(killr);
    Py_XDECREF(name);
    Py_XDECREF(reason);
    Py_XDECREF(retval);

    if (err != NULL)
        log_module(PY_LOG, LOG_WARNING, "%s", err);
}

int python_handle_topic(struct userNode *who, struct chanNode *chan, const char *old_topic, UNUSED_ARG(void *extra)) {
    PyObject* pwho = NULL, *pchan = NULL, *oldtopic = NULL;
    PyObject* name = NULL, *retval = NULL;
    const char* err = NULL;
    int i = 0;

    if (who == NULL) {
        Py_INCREF(Py_None);
        pwho = Py_None;
    } else {
        if ((pwho = pyobj_from_usernode(who)) == NULL) {
            err = "unable to allocate usernode";
            goto cleanup;
        }
    }

    if ((pchan = pyobj_from_channode(chan)) == NULL) {
        err = "unable to allocate channode";
        goto cleanup;
    }

    if (old_topic == NULL) {
        Py_INCREF(Py_None);
        oldtopic = Py_None;
    } else {
        oldtopic = PyString_FromString(old_topic);
        if (oldtopic == NULL) {
            err = "unable to allocate memory for old topic string";
            goto cleanup;
        }
    }

    name = PyString_FromString("topic");
    if (name == NULL) {
        err = "unable to allocate memory for topic handler function name";
        goto cleanup;
    }

    retval = PyObject_CallMethodObjArgs(handler_object, name, pwho, pchan, oldtopic, NULL);
    if (retval == NULL) {
        err = "error calling topic handler";
        goto cleanup;
    }

cleanup:
    Py_XDECREF(pwho);
    Py_XDECREF(pchan);
    Py_XDECREF(oldtopic);
    Py_XDECREF(name);

    if (retval != NULL && PyInt_Check(retval))
        i = (int)PyInt_AsLong(retval);

    Py_XDECREF(retval);

    if (err != NULL)
        log_module(PY_LOG, LOG_WARNING, "%s", err);

    return i;
}
/* ----------------------------------------------------------------------------- */
   

int python_load() {
    /* Init the python engine and do init work on modpython.py
       This is called during x3 startup, and on a python reload
    */
    PyObject *pName;
    char* buffer;
    char* env = getenv("PYTHONPATH");

    if (env)
        env = strdup(env);

    if (!env)
        setenv("PYTHONPATH", modpython_conf.scripts_dir, 1);
    else if (!strstr(env, modpython_conf.scripts_dir)) {
        buffer = (char*)malloc(strlen(env) + strlen(modpython_conf.scripts_dir) + 2);
        sprintf(buffer, "%s:%s", modpython_conf.scripts_dir, env);
        setenv("PYTHONPATH", buffer, 1);
        free(buffer);
        free(env);
    }

    Py_Initialize();
    Py_InitModule("_svc", EmbMethods);
    pName = PyString_FromString(modpython_conf.main_module);
    base_module = PyImport_Import(pName);
    Py_DECREF(pName);

    Py_XDECREF(handler_object);
    handler_object = NULL;

    if(base_module != NULL) {
        handler_object = python_new_handler_object();
        if(handler_object) {
            python_call_handler("init", NULL, 0, "", "", "");
            return 1;
        }
        else {
            /* error handler class not found */
            log_module(PY_LOG, LOG_WARNING, "Failed to create handler object");
            return 0;
        }
    }
    else {
        //PyErr_Print();
        python_log_module();
        log_module(PY_LOG, LOG_WARNING, "Failed to load modpython.py");
        return 0;
    }
    return 0;
}

int
python_finalize(void) {
    /* Called after X3 is fully up and running. 
       Code can be put here that needs to run to init things, but
       which is sensitive to everything else in x3 being up and ready
       to go.
     */

    PyRun_SimpleString("print 'Hello, World of Python!'");
    log_module(PY_LOG, LOG_INFO, "python module finalize");

    return 1;
}

static void
python_cleanup(void) {
    /* Called on shutdown of the python module  (or before reloading)
    */

    log_module(PY_LOG, LOG_INFO, "python module cleanup");

    Py_XDECREF(handler_object);
    handler_object = NULL;

    if (PyErr_Occurred())
        PyErr_Clear();
    Py_Finalize(); /* Shut down python enterpreter */

    log_module(PY_LOG, LOG_INFO, "python module cleanup done");
}

/* ---------------------------------------------------------------------------------- *
   Python module command handlers. 
*/
static MODCMD_FUNC(cmd_reload) {
    /* reload the python system completely 
    */
    log_module(PY_LOG, LOG_INFO, "Shutting python down");
    python_cleanup();
    log_module(PY_LOG, LOG_INFO, "Loading python stuff");
    if(python_load()) {
         reply("PYMSG_RELOAD_SUCCESS");
    }
    else {
        reply("PYMSG_RELOAD_FAILED");
    }
    return 1;
}

static MODCMD_FUNC(cmd_run) {
    /* this method allows running arbitrary python commands.
     * use with care.
     */
    char* msg;
    PyObject* py_main_module;
    PyObject* py_globals;
    PyObject* py_locals;
    PyObject* py_retval;
    PyObject* extype, *exvalue, *extraceback;
    PyObject* exvaluestr = NULL;
    char* exmsg = NULL, *exmsgptr;

    py_main_module = PyImport_AddModule("__main__");
    py_globals = py_locals = PyModule_GetDict(py_main_module);

    msg = unsplit_string(argv + 1, argc - 1, NULL);

    py_retval = PyRun_String(msg, Py_file_input, py_globals, py_locals);
    if (py_retval == NULL) {
        PyErr_Fetch(&extype, &exvalue, &extraceback);
        if (exvalue != NULL) {
            exvaluestr = PyObject_Str(exvalue);
            exmsg = strdup(PyString_AS_STRING(exvaluestr));
            exmsgptr = exmsg;
            while (exmsgptr && *exmsgptr) {
                if (*exmsgptr == '\n' || *exmsgptr == '\r' || *exmsgptr == '\t')
                    *exmsgptr = ' ';
                exmsgptr++;
            }
        }
        if (extype != NULL && exvalue != NULL && PyType_Check(extype)) {
            reply("PYMSG_RUN_EXCEPTION", ((PyTypeObject*)extype)->tp_name, exmsg);
        } else
            reply("PYMSG_RUN_UNKNOWN_EXCEPTION");

        if (extype != NULL)
            Py_DECREF(extype);
        if (exvalue != NULL)
            Py_DECREF(exvalue);
        if (extraceback != NULL)
            Py_DECREF(extraceback);
        if (exvaluestr != NULL)
            Py_DECREF(exvaluestr);
        if (exmsg)
            free(exmsg);
    } else {
        Py_DECREF(py_retval);
    }

    return 1;
}

#define numstrargs(X)   sizeof(X) / sizeof(*X)
static MODCMD_FUNC(cmd_command) {
    char *plugin = argv[1];
    char *command = argv[2];
    char *msg; /* args */
    if(argc > 3) {
       msg = unsplit_string(argv + 3, argc - 3, NULL);
    }
    else {
        msg = "";
    }
    char *args[] = {plugin, command, msg};
    python_call_handler("cmd_command", args, numstrargs(args), cmd->parent->bot->nick, user?user->nick:"", channel?channel->name:"");
    return 1;
}

static void modpython_conf_read(void) {
    dict_t conf_node;
    char const* str;

    if (!(conf_node = conf_get_data(MODPYTHON_CONF_NAME, RECDB_OBJECT))) {
        log_module(PY_LOG, LOG_ERROR, "config node '%s' is missing or has wrong type", MODPYTHON_CONF_NAME);
        return;
    }

    str = database_get_data(conf_node, "scripts_dir", RECDB_QSTRING);
    modpython_conf.scripts_dir = str ? str : "./";

    str = database_get_data(conf_node, "main_module", RECDB_QSTRING);
    modpython_conf.main_module = str ? str : "modpython";
}

int python_init(void) {
    /* X3 calls this function on init of the module during startup. We use it to
       do all our setup tasks and bindings 
    */

    PY_LOG = log_register_type("Python", "file:python.log");
    python_module = module_register("python", PY_LOG, "mod-python.help", NULL);
    conf_register_reload(modpython_conf_read);

    log_module(PY_LOG, LOG_INFO, "python module init");
    message_register_table(msgtab);

/*
    reg_auth_func(python_check_messages);
    reg_handle_rename_func(python_rename_account);
    reg_unreg_func(python_unreg_account);
    conf_register_reload(python_conf_read);
    saxdb_register("python", python_saxdb_read, python_saxdb_write);
    modcmd_register(python_module, "send",    cmd_send,    3, MODCMD_REQUIRE_AUTHED, NULL);
*/
    modcmd_register(python_module, "reload",  cmd_reload,  1,  MODCMD_REQUIRE_AUTHED, "flags", "+oper", NULL);
    modcmd_register(python_module, "run",  cmd_run,  2,  MODCMD_REQUIRE_AUTHED, "flags", "+oper", NULL);
    modcmd_register(python_module, "command", cmd_command, 3, MODCMD_REQUIRE_STAFF, NULL);

//  Please help us by implementing any of the callbacks listed as TODO below. They already exist
//  in x3, they just need handle_ bridges implemented. (see python_handle_join for an example)
    reg_server_link_func(python_handle_server_link, NULL);
    reg_new_user_func(python_handle_new_user, NULL);
    reg_nick_change_func(python_handle_nick_change, NULL);
    reg_del_user_func(python_handle_del_user, NULL);
//TODO:    reg_account_func(python_handle_account); /* stamping of account name to the ircd */
//TODO:    reg_handle_rename_func(python_handle_handle_rename); /* handle used to ALSO mean account name */
//TODO:    reg_failpw_func(python_handle_failpw);
//TODO:    reg_allowauth_func(python_handle_allowauth);
//TODO:    reg_handle_merge_func(python_handle_merge);
//
//TODO:    reg_oper_func(python_handle_oper);
//TODO:    reg_new_channel_func(python_handle_new_channel);
    reg_join_func(python_handle_join, NULL);
//TODO:    reg_del_channel_func(python_handle_del_channel);
//TODO:    reg_part_func(python_handle_part);
//TODO:    reg_kick_func(python_handle_kick);
    reg_topic_func(python_handle_topic, NULL);
//TODO:    reg_channel_mode_func(python_handle_channel_mode);

//TODO:    reg_privmsg_func(python_handle_privmsg);
//TODO:    reg_notice_func
//TODO:    reg_svccmd_unbind_func(python_handle_svccmd_unbind);
//TODO:    reg_chanmsg_func(python_handle_chanmsg);
//TODO:    reg_allchanmsg_func
//TODO:    reg_user_mode_func

    reg_exit_func(python_cleanup);

    python_load();
    return 1;
}

#endif /* WITH_PYTHON */