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/*
channel-rejoin.c : rejoin to channel if it's "temporarily unavailable"
this has nothing to do with autorejoin if kicked
Copyright (C) 2000 Timo Sirainen
This program 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 2 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "module.h"
#include "signals.h"
#include "misc.h"
#include "irc.h"
#include "irc-channels.h"
#include "channel-rejoin.h"
#define REJOIN_TIMEOUT (1000*60/**5*/) /* try to rejoin every 5 minutes */
static int rejoin_tag;
static void rejoin_destroy(IRC_SERVER_REC *server, REJOIN_REC *rec)
{
g_return_if_fail(IS_IRC_SERVER(server));
g_return_if_fail(rec != NULL);
server->rejoin_channels =
g_slist_remove(server->rejoin_channels, rec);
signal_emit("channel rejoin remove", 2, server, rec);
g_free(rec->channel);
g_free_not_null(rec->key);
g_free(rec);
}
static REJOIN_REC *rejoin_find(IRC_SERVER_REC *server, const char *channel)
{
GSList *tmp;
g_return_val_if_fail(IS_IRC_SERVER(server), NULL);
g_return_val_if_fail(channel != NULL, NULL);
for (tmp = server->rejoin_channels; tmp != NULL; tmp = tmp->next) {
REJOIN_REC *rec = tmp->data;
if (g_strcasecmp(rec->channel, channel) == 0)
return rec;
}
return NULL;
}
#define channel_have_key(chan) \
((chan) != NULL && (chan)->key != NULL && (chan)->key[0] != '\0')
static void channel_rejoin(IRC_SERVER_REC *server, const char *channel)
{
IRC_CHANNEL_REC *chanrec;
REJOIN_REC *rec;
g_return_if_fail(IS_IRC_SERVER(server));
g_return_if_fail(channel != NULL);
chanrec = irc_channel_find(server, channel);
if (chanrec == NULL || chanrec->joined) return;
rec = rejoin_find(server, channel);
if (rec != NULL) {
/* already exists */
rec->joining = FALSE;
/* update channel key */
g_free_and_null(rec->key);
if (channel_have_key(chanrec))
rec->key = g_strdup(chanrec->key);
} else {
/* new rejoin */
rec = g_new0(REJOIN_REC, 1);
rec->channel = g_strdup(channel);
if (channel_have_key(chanrec))
rec->key = g_strdup(chanrec->key);
server->rejoin_channels =
g_slist_append(server->rejoin_channels, rec);
signal_emit("channel rejoin new", 2, server, rec);
}
chanrec->left = TRUE;
channel_destroy(CHANNEL(chanrec));
}
static void event_target_unavailable(const char *data, IRC_SERVER_REC *server)
{
char *params, *channel;
IRC_CHANNEL_REC *chanrec;
g_return_if_fail(data != NULL);
params = event_get_params(data, 2, NULL, &channel);
if (ischannel(*channel)) {
chanrec = irc_channel_find(server, channel);
if (chanrec != NULL && chanrec->joined) {
/* dalnet event - can't change nick while
banned in channel */
} else {
/* channel is unavailable - try to join again
a bit later */
channel_rejoin(server, channel);
signal_stop();
}
}
g_free(params);
}
/* join ok/failed - remove from rejoins list. this happens always after join
except if the "target unavailable" error happens again */
static void sig_remove_rejoin(IRC_CHANNEL_REC *channel)
{
REJOIN_REC *rec;
if (!IS_IRC_CHANNEL(channel) || channel->server == NULL)
return;
rec = rejoin_find(channel->server, channel->name);
if (rec != NULL && rec->joining) {
/* join failed, remove the rejoin */
rejoin_destroy(channel->server, rec);
}
}
static void sig_disconnected(IRC_SERVER_REC *server)
{
if (!IS_IRC_SERVER(server))
return;
while (server->rejoin_channels != NULL)
rejoin_destroy(server, server->rejoin_channels->data);
}
static void server_rejoin_channels(IRC_SERVER_REC *server)
{
GSList *tmp, *next;
GString *channels, *keys;
int use_keys;
g_return_if_fail(IS_IRC_SERVER(server));
channels = g_string_new(NULL);
keys = g_string_new(NULL);
use_keys = FALSE;
for (tmp = server->rejoin_channels; tmp != NULL; tmp = next) {
REJOIN_REC *rec = tmp->data;
next = tmp->next;
if (rec->joining) {
/* we missed the join (failed) message,
remove from rejoins.. */
rejoin_destroy(server, rec);
continue;
}
rec->joining = TRUE;
g_string_sprintfa(channels, "%s,", rec->channel);
if (rec->key == NULL)
g_string_append(keys, "x,");
else {
g_string_sprintfa(keys, "%s,", rec->key);
use_keys = TRUE;
}
}
if (channels->len > 0) {
g_string_truncate(channels, channels->len-1);
g_string_truncate(keys, keys->len-1);
if (use_keys) g_string_sprintfa(channels, " %s", keys->str);
server->channels_join(server, channels->str, TRUE);
}
g_string_free(channels, TRUE);
g_string_free(keys, TRUE);
}
static int sig_rejoin(void)
{
GSList *tmp;
for (tmp = servers; tmp != NULL; tmp = tmp->next) {
IRC_SERVER_REC *rec = tmp->data;
if (IS_IRC_SERVER(rec) && rec->rejoin_channels != NULL)
server_rejoin_channels(rec);
}
return TRUE;
}
static void cmd_rmrejoins(const char *data, IRC_SERVER_REC *server)
{
if (!IS_IRC_SERVER(server) || !server->connected)
cmd_return_error(CMDERR_NOT_CONNECTED);
while (server->rejoin_channels != NULL)
rejoin_destroy(server, server->rejoin_channels->data);
}
void channel_rejoin_init(void)
{
rejoin_tag = g_timeout_add(REJOIN_TIMEOUT,
(GSourceFunc) sig_rejoin, NULL);
command_bind("rmrejoins", NULL, (SIGNAL_FUNC) cmd_rmrejoins);
signal_add_first("event 437", (SIGNAL_FUNC) event_target_unavailable);
signal_add_first("channel joined", (SIGNAL_FUNC) sig_remove_rejoin);
signal_add_first("channel destroyed", (SIGNAL_FUNC) sig_remove_rejoin);
signal_add("server disconnected", (SIGNAL_FUNC) sig_disconnected);
}
void channel_rejoin_deinit(void)
{
g_source_remove(rejoin_tag);
command_unbind("rmrejoins", (SIGNAL_FUNC) cmd_rmrejoins);
signal_remove("event 437", (SIGNAL_FUNC) event_target_unavailable);
signal_remove("channel joined", (SIGNAL_FUNC) sig_remove_rejoin);
signal_remove("channel destroyed", (SIGNAL_FUNC) sig_remove_rejoin);
signal_remove("server disconnected", (SIGNAL_FUNC) sig_disconnected);
}
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