#!/bin/rc
# grid/chat - minimal chat client for hubfs
# usage: grid/chat [-j CHANNEL] [-n NICK] [chatsrv]

rfork efn

fn helpmessage{
	echo '    /c to list channels'
	echo '    /h for this message'
	echo '    /j CHANNEL to change channel'
	echo '    /m MSG to emote'
	echo '    /n NICK to change nick'
	echo '    /q to quit'
}

fn close{
	#echo $nick vanishes from $channel into the void. >>/n/$chatsrv/$channel
	@{echo kill>/proc/$catkill/ctl}
}

fn shutdown{
	close
	exit
}

fn sighup{
	shutdown
}

fn sigint{
	shutdown
}

channel=chat
chatsrv=149.28.123.225
while (~ $1 -*){
	switch($1){
	case -j
		channel = $2
		shift 2
	case -n
		nick = $2
		shift 2
	case *
		echo bad flag $1 -j CHANNEL -n NICK
		shift
	}
}
if(! ~ $1 '')
	chatsrv=$1
if(! test -e /n/$chatsrv/chat)
	mount /srv/$chatsrv /n/$chatsrv
if(! test -e /n/$chatsrv/chat){
	echo no chat service named $chatsrv found >[1=2]
	exit no.chatsrv
if(! test -e /n/$chatsrv/$channel)
	echo no channel named $channel found >[1=2]
	exit no.channel
}

label $channel
if(~ $#nick 0)
	nick=thedæmon
#echo JOIN $nick to chat >>/n/$chatsrv/$channel
cat /n/$chatsrv/$channel &
catkill=$apid

while(talk=`{read}){
	if(~ $talk /*){
		switch($talk){
		case /c
			echo available channels:
			lc /n/$chatsrv
			echo -------------------
			echo currently in $channel
			echo
			command=yes
		case /h*
			helpmessage
			echo currently in $channel
			echo
			command=yes
		case /j*
			if (~ $talk(2) '')
				echo must specify a channel
			if not if(test -e /n/$chatsrv/$talk(2)){
				close
				channel=$talk(2)
				cat /n/$chatsrv/$channel &
				catkill=$apid
				#echo JOIN $nick to $channel >>/n/$chatsrv/$channel
			}
			if not
				echo channel does not exist
			command=yes
		case /m*
			if(! ~ $talk(2) ''){
				echo ' *' $nick $talk(2-) >>/n/$chatsrv/$channel
			}
			if not
				echo must provide a message
			command=yes
		case /n*
			if(! ~ $talk(2) ''){
				echo ' *' $nick is now $talk(2) >>/n/$chatsrv/$channel
				nick=$talk(2)
			}
			if not
				echo must supply a nick
			command=yes
		case /q*
			shutdown
		case *
			echo unknown command
			command=yes
		}
	}
	if(~ $talk '')
		command=yes
	if(! ~ $command yes){
		line=`{echo $nick ' → ' $talk}
		echo $line >>/n/$chatsrv/$channel
	}
	command=no
}