use strict;
 use warnings;
 
 no strict 'subs';
 
 my $SCRIPT_NAME = 'parrot';
 my $SCRIPT_AUTHOR = 'The Krusty Krab <wowaname@volatile.ch>';
 my $SCRIPT_VERSION = '1.0';
 my $SCRIPT_LICENCE = 'Public domain';
 my $SCRIPT_DESC = 'Relay channel messages and modes';
 
 # %cbs{server}{hook_name} = $hook_ptr:
 #     stores hook pointers to unhook() on exit
 # %chans{server}{channel} = @groups:
 #     stores groups associated with a channel
 # %groups{groupname}{server}{channel} = $flags:
 #     stores channels associated with a group, as well as the channel's flags
 # $READ, $STAT, $MODE:
 #     flags for -read, -stat, -mode switches
 our (%cbs, %chans, %groups);
 our ($READ, $STAT, $MODE) = (0x1, 0x2, 0x4);
 our $confpath;
 
 sub servchan
 {
 	my $buffer = shift;
 	return (lc weechat::buffer_get_string($buffer, 'localvar_server'),
 		lc weechat::buffer_get_string($buffer, 'localvar_channel'));
 }
 
 sub ircbuf { weechat::buffer_search('irc', "(?i)".(join '.', @_)) }
 
 sub getgroup
 {
 	my ($server, $channel) = @_;
 	my @ret;
 
 	for my $group (@{ $chans{$server}{$channel} }) {
 	for my $to_serv (keys %{ $groups{$group} }) {
 	for my $to_chan (keys %{ $groups{$group}{$to_serv} }) {
 		# don't send to myself
 		next if $to_serv eq $server and $to_chan eq $channel;
 		push @ret, [$to_serv, $to_chan, $groups{$group}{$to_serv}{$to_chan}, $group]
 	} } }
 
 	return @ret;
 }
 
 sub sendto
 {
 	my ($server, $command) = @_;
 	weechat::hook_signal_send('irc_input_send',
 		weechat::WEECHAT_HOOK_SIGNAL_STRING,
 		"$server;;1;;$command");
 }
 
 sub add_relay
 {
 	my ($groupname, $server, $channel, $flags) = @_;
 	return if exists $cbs{$server};
 	push @{ $chans{$server}{$channel} }, $groupname;
 	$groups{$groupname}{$server}{$channel} = $flags;
 	$cbs{$server}{PRIVMSG} =
 		weechat::hook_signal("$server,irc_raw_in_privmsg", 'irc_privmsg_notice', '');
 	$cbs{$server}{NOTICE} =
 		weechat::hook_signal("$server,irc_raw_in_notice", 'irc_privmsg_notice', '');
 	$cbs{$server}{OUT_PRIVMSG} =
 		weechat::hook_signal("$server,irc_out1_privmsg", 'ircout_privmsg_notice', '');
 	$cbs{$server}{OUT_NOTICE} =
 		weechat::hook_signal("$server,irc_out1_notice", 'ircout_privmsg_notice', '');
 	if ($flags & $STAT) {
 		$cbs{$server}{JOIN} =
 			weechat::hook_signal("$server,irc_raw_in_join", 'irc_join', '');
 		$cbs{$server}{PART} =
 			weechat::hook_signal("$server,irc_raw_in_part", 'irc_part', '');
 		$cbs{$server}{KICK} =
 			weechat::hook_signal("$server,irc_raw_in_kick", 'irc_kick', '');
 		$cbs{$server}{NICK} =
 			weechat::hook_signal("$server,irc_raw_in_nick", 'irc_nick', '');
 		$cbs{$server}{QUIT} =
 			weechat::hook_signal("$server,irc_raw_in_quit", 'irc_quit', '');
 	}
 	if ($flags & $MODE) {
 #		$cbs{$server}{MODE} =
 #			weechat::hook_signal("$server,irc_raw_in_mode", 'irc_mode', '');
 		$cbs{$server}{TOPIC} =
 			weechat::hook_signal("$server,irc_raw_in_topic", 'irc_topic', '');
 	}
 }
 
 sub read_conf
 {
 	open FH, '<', $confpath or weechat::print('', weechat::prefix('error').
 		"Error opening $confpath for reading: $!"), return;
 	while (<FH>) {
 		chomp;
 		add_relay(split ' ');
 	}
 	close FH;
 }
 
 sub write_conf
 {
 	open FH, '>', $confpath or weechat::print('', weechat::prefix('error').
 		"Error opening $confpath for writing: $!"), return;
 	for my $server (keys %chans) {
 	for my $channel (keys %{ $chans{$server} }) {
 	for my $group (@{ $chans{$server}{$channel} }) {
 		my $flags = $groups{$group}{$server}{$channel};
 		print FH "$group $server $channel $flags\n";
 	} } }
 	close FH;
 }
 
 sub irc_privmsg_notice
 {
 	my (undef, $server, $cmd, $nick, $channel, $message) = (shift,
 		shift =~ /(.+),irc_raw_in_(privmsg|notice)/i,
 		shift =~ /:([^! ]*)[^ ]* [^ ]+ ([^ ]+) :?(.*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		if ($message =~ /^\x01ACTION /i) {
 			$message =~ s/^\x01ACTION |\x01$//g;
 			sendto($to_serv, "/msg $to_chan * \x02$nick\x0f $message");
 			next;
 		}
 		my $prefix = lc $cmd eq 'notice' ? "[\x02$nick\x0f]" : "<\x02$nick\x0f>";
 		sendto($to_serv, "/msg $to_chan $prefix $message");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub ircout_privmsg_notice
 {
 	my (undef, $server, $cmd, $channel, $message) = (shift,
 		shift =~ /(.*),irc_out1_(privmsg|notice)/i,
 		shift =~ /[^ ]+ ([^ ]+) :?(.*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		my $prefix = lc $cmd eq 'notice' ? 'notice' : 'msg';
 		if ($message =~ /^\x01ACTION /i) {
 			$message =~ s/^\x01ACTION |\x01$//g;
 			sendto($to_serv, "/$prefix $to_chan \x01ACTION $message\x01");
 			next;
 		}
 		sendto($to_serv, "/$prefix $to_chan $message");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_join
 {
 	my (undef, $server, $nick, $host, $channel) = (shift,
 		shift =~ /(.+),irc_raw_in_join/i,
 		shift =~ /:([^! ]*)([^ ]*) join :?([^ ]+)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $STAT;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/notice $to_chan \x02$nick\x0f$host joined $server/$channel\x0f");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_part
 {
 	my (undef, $server, $nick, $channel, $message) = (shift,
 		shift =~ /(.+),irc_raw_in_part/i,
 		shift =~ /:([^! ]*)[^ ]* part ([^ ]+) ?:?(.*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $STAT;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/notice $to_chan \x02$nick\x0f left $server/$channel\x0f: $message");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_kick
 {
 	my (undef, $server, $nick, $channel, $target, $message) = (shift,
 		shift =~ /(.+),irc_raw_in_kick/i,
 		shift =~ /:([^! ]*)[^ ]* kick ([^ ]+) ([^ ]+) :?(.*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $STAT;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/notice $to_chan \x02$nick\x0f kicked $target\x0f from $server/$channel\x0f: $message");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_nick
 {
 	my (undef, $server, $nick, $newnick) = (shift,
 		shift =~ /(.+),irc_raw_in_nick/i,
 		shift =~ /:([^! ]*)[^ ]* nick :?(.*)/i);
 
 	for my $channel (keys %{ $chans{$server} }) {
 	my $iptr = weechat::infolist_get('irc_nick', '', "$server,$channel,$nick");
 	next unless $iptr;
 	weechat::infolist_free($iptr);
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $STAT;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/notice $to_chan \x02$nick\x0f is now \x02$newnick\x0f");
 	} }
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_quit
 {
 	my (undef, $server, $nick, $message) = (shift,
 		shift =~ /(.+),irc_raw_in_quit/i,
 		shift =~ /:([^! ]*)[^ ]* quit :?(.*)/i);
 
 	for my $channel (keys %{ $chans{$server} }) {
 	my $iptr = weechat::infolist_get('irc_nick', '', "$server,$channel,$nick");
 	next unless $iptr;
 	weechat::infolist_free($iptr);
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $STAT;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/notice $to_chan \x02$nick\x0f left $server: $message");
 	} }
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_mode
 {
 	my (undef, $server, $nick, $channel, $modes) = (shift,
 		shift =~ /(.+),irc_raw_in_mode/i,
 		shift =~ /:([^! ]*)[^ ]* mode ([^ ]+) (.*)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub irc_topic
 {
 	my (undef, $server, $nick, $channel, $message) = (shift,
 		shift =~ /(.+),irc_raw_in_topic/i,
 		shift =~ /:([^! ]*)[^ ]* topic ([^ ]+) :?([^ ]+)/i);
 	($server, $channel) = (lc $server, lc $channel);
 	weechat::print('',"$server $channel");
 	return weechat::WEECHAT_RC_OK unless exists $chans{$server}{$channel};
 	return weechat::WEECHAT_RC_OK if lc $nick eq lc weechat::info_get('irc_nick', $server);
 
 	for (getgroup($server, $channel)) {
 		my ($to_serv, $to_chan, $flags, undef) = @$_;
 		next unless $flags & $MODE;
 		next if $flags & $READ;
 		next unless ircbuf("$to_serv.$to_chan");
 		sendto($to_serv, "/topic $to_chan $message");
 	}
 
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub cmd_parrot
 {
 	my (undef, $buffer, $command) = @_;
 	my ($server, $channel) = servchan($buffer);
 	my ($flags, $remove, $groupname) =
 	   (     0,       0,         '');
 	for (split / +/, $command) {
 		/^-read$/   and ($flags |= $READ), next;
 		/^-stat$/   and ($flags |= $STAT), next;
 		/^-mode$/   and ($flags |= $MODE), next;
 		/^-remove$/ and ($remove = 1), next;
 		$groupname = $_; last;
 	}
 
 	unless ($groupname) {
 		if ($chans{$server}{$channel}) {
 			for (getgroup($server, $channel)) {
 				my ($to_serv, $to_chan, $flags, $group) = @$_;
 				my $flag_str = $flags ? ':' : '';
 				$flag_str .= ' readonly' if $flags & $READ;
 				$flag_str .= ' statusmsg' if $flags & $STAT;
 				$flag_str .= ' sendmodes' if $flags & $MODE;
 				weechat::print($buffer, weechat::prefix('server').
 					"Relaying to $to_serv/$to_chan in group $group$flag_str");
 			}
 		} else {
 			weechat::print($buffer, weechat::prefix('server').
 				"This channel is not being relayed");
 		}
 		return weechat::WEECHAT_RC_OK;
 	}
 
 	# clear hooks first (if they exist)
 	if (exists $cbs{$server}) {
 		weechat::unhook($cbs{$server}{$_}) for (keys %{ $cbs{$server} });
 		delete $cbs{$server};
 	}
 	@{ $chans{$server}{$channel} } =
 		grep { $_ ne $groupname } @{ $chans{$server}{$channel} };
 
 	if ($remove) {
 		delete $groups{$groupname}{$server}{$channel};
 		delete $groups{$groupname}{$server} unless $groups{$groupname}{$server};
 		delete $groups{$groupname} unless $groups{$groupname};
 		delete $chans{$server}{$channel} unless $chans{$server}{$channel};
 		delete $chans{$server} unless $chans{$server};
 
 		write_conf();
 		weechat::print($buffer, weechat::prefix('server').
 			"Removed relay from group $groupname");
 		return weechat::WEECHAT_RC_OK;
 	}
 
 	add_relay($groupname, $server, $channel, $flags);
 
 	write_conf();
 	weechat::print($buffer, weechat::prefix('server').
 		"Added relay to group $groupname");
 	return weechat::WEECHAT_RC_OK;
 }
 
 sub completion_groupnames
 {
 	my $completion = pop;
 	weechat::hook_completion_list_add($completion, $_, 0,
 		weechat::WEECHAT_LIST_POS_SORT) for keys %groups;
 }
 
 if (weechat::register($SCRIPT_NAME, $SCRIPT_AUTHOR, $SCRIPT_VERSION,
  $SCRIPT_LICENCE, $SCRIPT_DESC, '', '')) {
 	$confpath = weechat::info_get('weechat_dir', '') . '/parrot.db';
 	weechat::hook_completion('perl_parrot_groupname', 'parrot.pl group names',
 		'completion_groupnames', '');
 	weechat::hook_command('parrot', $SCRIPT_DESC,
 		"[-read] [-stat] [-mode] groupname\n".
 		"-remove",
 		"-read: relay from this channel to others, but do not relay to\n".
 		"       this channel\n".
 		"-stat: show status messages (join/part) in this channel\n".
 		"-mode: transfer modes to this channel, even if you are op".
 		"groupname: all channels with the same group name are relayed together\n".
 		"-remove: remove this channel from the relay group",
 		'-remove %(perl_parrot_groupname) %-'.
 		'||-read|-stat|-mode|%(perl_parrot_groupname)|%*',
 		'cmd_parrot', '');
 	read_conf();
 }

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