X-Git-Url: https://git.distorted.org.uk/~mdw/ircbot/blobdiff_plain/8979e0d6cafbb1dc0fdc1cb67a1d5d080c3cabad..ba7cc780277e0d2aa12d3c9f3051d25f46507979:/bot.tcl

diff --git a/bot.tcl b/bot.tcl
index 1e4d948..f9dcda8 100755
--- a/bot.tcl
+++ b/bot.tcl
@@ -1,11 +1,116 @@
-#!/usr/bin/tclsh8.2
+# Core bot code
 
-set host chiark
-set port 6667
-set nick Blight
+proc defset {varname val} {
+    upvar #0 $varname var
+    if {![info exists var]} { set var $val }
+}
+
+# must set host
+defset port 6667
+
+defset nick testbot
+defset ownfullname "testing bot"
+defset ownmailaddr test-irc-bot@example.com
+
+defset musthaveping_ms 10000
+defset out_maxburst 6
+defset out_interval 2100
+defset out_lag_lag 5000
+defset out_lag_very 25000
+
+proc manyset {list args} {
+    foreach val $list var $args {
+	upvar 1 $var my
+	set my $val
+    }
+}
+
+proc try_except_finally {try except finally} {
+    global errorInfo errorCode
+    set er [catch { uplevel 1 $try } emsg]
+    if {$er} {
+	set ei $errorInfo
+	set ec $errorCode
+	if {[catch { uplevel 1 $except } emsg3]} {
+	    append ei "\nALSO ERROR HANDLING ERROR:\n$emsg3"
+	}
+    }
+    set er2 [catch { uplevel 1 $finally } emsg2]
+    if {$er} {
+	if {$er2} {
+	    append ei "\nALSO ERROR CLEANING UP:\n$emsg2"
+	}
+	return -code $er -errorinfo $ei -errorcode $ec $emsg
+    } elseif {$er2} {
+	return -code $er2 -errorinfo $errorInfo -errorcode $errorCode $emsg2
+    } else {
+	return $emsg
+    }
+}
 
-proc sendout {command args} {
+proc out__vars {} {
+    uplevel 1 {
+	global out_queue out_creditms out_creditat out_interval out_maxburst
+	global out_lag_lag out_lag_very
+#set pr [lindex [info level 0] 0]
+#puts $pr>[clock seconds]|$out_creditat|$out_creditms|[llength $out_queue]<
+    }
+}
+
+proc out_lagged {} {
+    out__vars
+    if {[llength $out_queue]*$out_interval > $out_lag_very} {
+	return 2
+    } elseif {[llength $out_queue]*$out_interval > $out_lag_lag} {
+	return 1
+    } else {
+	return 0
+    }
+}
+
+proc out_restart {} {
+    out__vars
+    
+    set now [clock seconds]
+    incr out_creditms [expr {($now - $out_creditat) * 1000}]
+    set out_creditat $now
+    if {$out_creditms > $out_maxburst*$out_interval} {
+	set out_creditms [expr {$out_maxburst*$out_interval}]
+    }
+    out_runqueue $now
+}
+
+proc out_runqueue {now} {
     global sock
+    out__vars
+    
+    while {[llength $out_queue] && $out_creditms >= $out_interval} {
+#puts rq>$now|$out_creditat|$out_creditms|[llength $out_queue]<
+	manyset [lindex $out_queue 0] orgwhen msg
+	set out_queue [lrange $out_queue 1 end]
+	if {[llength $out_queue]} {
+	    append orgwhen "+[expr {$now - $orgwhen}]"
+	    append orgwhen "([llength $out_queue])"
+	}
+	puts "$orgwhen -> $msg"
+	puts $sock $msg
+	incr out_creditms -$out_interval
+    }
+    if {[llength $out_queue]} {
+	after $out_interval out_nextmessage
+    }
+}
+
+proc out_nextmessage {} {
+    out__vars
+    set now [clock seconds]
+    incr out_creditms $out_interval
+    set out_creditat $now
+    out_runqueue $now
+}
+
+proc sendout_priority {priority command args} {
+    global sock out_queue
     if {[llength $args]} {
 	set la [lindex $args end]
 	set args [lreplace $args end end]
@@ -18,10 +123,20 @@ proc sendout {command args} {
     }
     set args [lreplace $args 0 -1 $command]
     set string [join $args { }]
-    puts "-> $string"
-    puts $sock $string
+    set now [clock seconds]
+    set newe [list $now $string]
+    if {$priority} {
+	set out_queue [concat [list $newe] $out_queue]
+    } else {
+	lappend out_queue $newe
+    }
+    if {[llength $out_queue] == 1} {
+	out_restart
+    }
 }
 
+proc sendout {command args} { eval sendout_priority [list 0 $command] $args }
+    
 proc log {data} {
     puts $data
 }
@@ -46,13 +161,24 @@ proc bgerror {msg} {
 }
 
 proc onread {args} {
-    global sock
+    global sock nick calling_nick errorInfo errorCode
     
-    if {[gets $sock line] == -1} { set terminate 1; return }
+    if {[gets $sock line] == -1} { fail "EOF/error on input" }
     regsub -all "\[^ -\176\240-\376\]" $line ? line
     set org $line
+    
+    set ei $errorInfo
+    set ec $errorCode
+    catch { unset calling_nick }
+    set errorInfo $ei
+    set errorCode $ec
+    
     if {[regexp -nocase {^:([^ ]+) (.*)} $line dummy prefix remain]} {
 	set line $remain
+	if {[regexp {^([^!]+)!} $prefix dummy maybenick]} {
+	    set calling_nick $maybenick
+	    if {"[irctolower $maybenick]" == "[irctolower $nick]"} return
+	}
     } else {
 	set prefix {}
     }
@@ -74,11 +200,14 @@ proc onread {args} {
     }
     if {"$command" == "PRIVMSG" &&
         [regexp {^[&#+!]} [lindex $params 0]] &&
-        ![regexp {^!} [lindex $params 1]]} {
+        ![regexp {^![a-z][-a-z]*[a-z]( .*)?$} [lindex $params 1]]} {
 	# on-channel message, ignore
+	catch {
+	    recordlastseen_p $prefix "talking on [lindex $params 0]" 1
+	}
 	return
     }
-    log "<- $org"
+    log "[clock seconds] <- $org"
     set procname msg_$command
     if {[catch { info body $procname }]} { return }
     if {[catch {
@@ -89,14 +218,27 @@ proc onread {args} {
     }
 }
 
+proc sendprivmsg {dest l} {
+    foreach v [split $l "\n"] {
+	sendout [expr {[ischan $dest] ? "PRIVMSG" : "NOTICE"}] $dest $v
+    }
+}
+proc sendaction_priority {priority dest what} {
+    sendout_priority $priority PRIVMSG $dest "\001ACTION $what\001"
+}
+proc msendprivmsg {dest ll} { foreach l $ll { sendprivmsg $dest $l } }
+proc msendprivmsg_delayed {delay dest ll} { after $delay [list msendprivmsg $dest $ll] }
+
 proc prefix_none {} {
     upvar 1 p p
     if {[string length $p]} { error "prefix specified" }
 }
 
 proc msg_PING {p c s1} {
+    global musthaveping_after
     prefix_none
     sendout PONG $s1
+    if {[info exists musthaveping_after]} connected
 }
 
 proc check_nick {n} {
@@ -104,39 +246,1332 @@ proc check_nick {n} {
     if {[regexp {^[-0-9]} $n]} { error "bad nick start" }
 }
 
+proc ischan {dest} {
+    return [regexp {^[&#+!]} $dest]
+}
+
+proc irctolower {v} {
+    foreach {from to} [list "\\\[" "{" \
+			  "\\\]" "}" \
+	                  "\\\\" "|" \
+			  "~"    "^"] {
+	regsub -all $from $v $to v
+    }
+    return [string tolower $v]
+}
+
 proc prefix_nick {} {
     global nick
     upvar 1 p p
     upvar 1 n n
     if {![regexp {^([^!]+)!} $p dummy n]} { error "not from nick" }
     check_nick $n
-    if {"[string tolower $n]" == "$nick"} { error "from myself" }
+    if {"[irctolower $n]" == "[irctolower $nick]"} {
+	error "from myself" {} {}
+    }
+}
+
+proc showintervalsecs {howlong} {
+    return [showintervalsecs/[opt timeformat] $howlong]
+}
+
+proc showintervalsecs/ks {howlong} {
+    if {$howlong < 1000} {
+	return "${howlong}s"
+    } else {
+	if {$howlong < 1000000} {
+	    set pfx k
+	    set scale 1000
+	} else {
+	    set pfx M
+	    set scale 1000000
+	}
+	set value [expr "$howlong.0 / $scale"]
+	foreach {min format} {100 %.0f 10 %.1f 1 %.2f} {
+	    if {$value < $min} continue
+	    return [format "$format${pfx}s" $value]
+	}
+    }
+}
+
+proc format_qty {qty unit} {
+    set o $qty
+    append o " "
+    append o $unit
+    if {$qty != 1} { append o s }
+    return $o
+}
+
+proc showintervalsecs/hms {qty} {
+    set ul {second 60 minute 60 hour 24 day 7 week}
+    set remainv 0
+    while {[llength $ul] > 1 && $qty >= [set uv [lindex $ul 1]]} {
+	set remainu [lindex $ul 0]
+	set remainv [expr {$qty % $uv}]
+	set qty [expr {($qty-$remainv)/$uv}]
+	set ul [lreplace $ul 0 1]
+    }
+    set o [format_qty $qty [lindex $ul 0]]
+    if {$remainv} {
+	append o " "
+	append o [format_qty $remainv $remainu]
+    }
+    return $o
+}
+
+proc showinterval {howlong} {
+    if {$howlong <= 0} {
+	return {just now}
+    } else {
+	return "[showintervalsecs $howlong] ago"
+    }
+}
+
+proc showtime {when} {
+    return [showinterval [expr {[clock seconds] - $when}]]
+}
+
+proc def_msgproc {name argl body} {
+    proc msg_$name "varbase $argl" "\
+    upvar #0 msg/\$varbase/dest d\n\
+    upvar #0 msg/\$varbase/str s\n\
+    upvar #0 msg/\$varbase/accum a\n\
+$body"
+}
+
+def_msgproc begin {dest str} {
+    set d $dest
+    set s $str
+    set a {}
+}
+
+def_msgproc append {str} {
+    set ns "$s$str"
+    if {[string length $s] && [string length $ns] > 65} {
+	msg__sendout $varbase
+	set s " [string trimleft $str]"
+    } else {
+	set s $ns
+    }
+}
+
+def_msgproc finish {} {
+    msg__sendout $varbase
+    unset s
+    unset d
+    return $a
+}
+
+def_msgproc _sendout {} {
+    lappend a [string trimright $s]
+    set s {}
+}
+
+proc looking_whenwhere {when where} {
+    set str [showtime [expr {$when-1}]]
+    if {[string length $where]} { append str " on $where" }
+    return $str
+}
+
+proc recordlastseen_n {n how here} {
+    global lastseen lookedfor
+    set lastseen([irctolower $n]) [list $n [clock seconds] $how]
+    if {!$here} return
+    upvar #0 lookedfor([irctolower $n]) lf
+    if {[info exists lf]} {
+	switch -exact [llength $lf] {
+	    0 {
+		set ml {}
+	    }
+	    1 {
+		manyset [lindex $lf 0] when who where
+		set ml [list \
+ "FYI, $who was looking for you [looking_whenwhere $when $where]."]
+	    }
+	    default {
+		msg_begin tosend $n "FYI, people have been looking for you:"
+		set i 0
+		set fin ""
+		foreach e $lf {
+		    incr i
+		    if {$i == 1} {
+			msg_append tosend " "
+		    } elseif {$i == [llength $lf]} {
+			msg_append tosend " and "
+			set fin .
+		    } else {
+			msg_append tosend ", "
+		    }
+		    manyset $e when who where
+		    msg_append tosend \
+			    "$who ([looking_whenwhere $when $where])$fin"
+		}
+		set ml [msg_finish tosend]
+	    }
+	}
+	unset lf
+	msendprivmsg_delayed 1000 $n $ml
+    }
+}
+
+proc note_topic {showoff whoby topic} {
+    set msg "FYI, $whoby has changed the topic on $showoff"
+    if {[string length $topic] < 160} {
+	append msg " to $topic"
+    } else {
+	append msg " but it is too long to reproduce here !"
+    }
+    set showoff [irctolower $showoff]
+    set tell [chandb_get $showoff topictell]
+    if {[lsearch -exact $tell *] >= 0} {
+	set tryspies [chandb_list]
+    } else {
+	set tryspies $tell
+    }
+    foreach spy $tryspies {
+	set see [chandb_get $spy topicsee]
+	if {[lsearch -exact $see $showoff] >= 0 || \
+		([lsearch -exact $see *] >= 0 && \
+		[lsearch -exact $tell $spy] >= 0)} {
+	    sendprivmsg $spy $msg
+	}
+    }
+}
+
+proc recordlastseen_p {p how here} {
+    prefix_nick
+    recordlastseen_n $n $how $here
+}
+
+proc chanmode_arg {} {
+    upvar 2 args cm_args
+    set rv [lindex $cm_args 0]
+    set cm_args [lreplace cm_args 0 0]
+    return $rv
+}
+
+proc chanmode_o1 {m g p chan} {
+    global nick chan_initialop
+    prefix_nick
+    set who [chanmode_arg]
+    recordlastseen_n $n "being nice to $who" 1
+    if {"[irctolower $who]" == "[irctolower $nick]"} {
+	set nlower [irctolower $n]
+	upvar #0 nick_unique($nlower) u
+	if {[chandb_exists $chan]} {
+	    sendprivmsg $n Thanks.
+	} elseif {![info exists u]} {
+	    sendprivmsg $n {Op me while not on the channel, why don't you ?}
+	} else {
+	    set chan_initialop([irctolower $chan]) $u
+	    sendprivmsg $n \
+ "Thanks. You can use `channel manager ...' to register this channel."
+	    if {![nickdb_exists $n] || ![string length [nickdb_get $n username]]} {
+		sendprivmsg $n \
+ "(But to do that you must register your nick securely first.)"
+	    }
+	}
+    }
+}
+
+proc chanmode_o0 {m g p chan} {
+    global nick chandeop
+    prefix_nick
+    set who [chanmode_arg]
+    recordlastseen_p $p "being mean to $who" 1
+    if {"[irctolower $who]" == "[irctolower $nick]"} {
+	set chandeop($chan) [list [clock seconds] $p]
+    }
+}
+
+proc msg_MODE {p c dest modelist args} {
+    if {![ischan $dest]} return
+    if {[regexp {^\-(.+)$} $modelist dummy modelist]} {
+	set give 0
+    } elseif {[regexp {^\+(.+)$} $modelist dummy modelist]} {
+	set give 1
+    } else {
+	error "invalid modelist"
+    }
+    foreach m [split $modelist] {
+	set procname chanmode_$m$give
+	if {[catch { info body $procname }]} {
+	    recordlastseen_p $p "fiddling with $dest" 1
+	} else {
+	    $procname $m $give  $p $dest
+	}
+    }
+}
+
+proc leaving {lchan} {
+    foreach luser [array names nick_onchans] {
+	upvar #0 nick_onchans($luser) oc
+	set oc [grep tc {"$tc" != "$lchan"} $oc]
+    }
+    upvar #0 chan_nicks($lchan) nlist
+    unset nlist
+}
+
+proc doleave {lchan} {
+    sendout PART $lchan
+    leaving $lchan
+}
+
+proc dojoin {lchan} {
+    global chan_nicks
+    sendout JOIN $lchan
+    set chan_nicks($lchan) {}
+}
+
+proc check_justme {lchan} {
+    global nick
+    upvar #0 chan_nicks($lchan) nlist
+    if {[llength $nlist] != 1} return
+    if {"[lindex $nlist 0]" != "[irctolower $nick]"} return
+    if {[chandb_exists $lchan]} {
+	set mode [chandb_get $lchan mode]
+	if {"$mode" != "*"} {
+	    sendout MODE $lchan $mode
+	}
+	set topic [chandb_get $lchan topicset]
+	if {[string length $topic]} {
+	    sendout TOPIC $lchan $topic
+	}
+    } else {
+	doleave $lchan
+    }
+}
+
+proc process_kickpart {chan user} {
+    global nick
+    check_nick $user
+    set luser [irctolower $user]
+    set lchan [irctolower $chan]
+    if {![ischan $chan]} { error "not a channel" }
+    if {"$luser" == "[irctolower $nick]"} {
+	leaving $lchan
+    } else {
+	upvar #0 nick_onchans($luser) oc
+	upvar #0 chan_nicks($lchan) nlist
+	set oc [grep tc {"$tc" != "$lchan"} $oc]
+	set nlist [grep tn {"$tn" != "$luser"} $nlist]
+	nick_case $user
+	if {![llength $oc]} {
+	    nick_forget $luser
+	} else {
+	    check_justme $lchan
+	}
+    }
+}
+
+proc msg_TOPIC {p c dest topic} {
+    prefix_nick
+    if {![ischan $dest]} return
+    recordlastseen_n $n "changing the topic on $dest" 1
+    note_topic [irctolower $dest] $n $topic
+}
+
+proc msg_KICK {p c chans users comment} {
+    set chans [split $chans ,]
+    set users [split $users ,]
+    if {[llength $chans] > 1} {
+	foreach chan $chans user $users { process_kickpart $chan $user }
+    } else {
+	foreach user $users { process_kickpart [lindex $chans 0] $user }
+    }
+}
+
+proc msg_KILL {p c user why} {
+    nick_forget $user
+}
+
+set nick_counter 0
+set nick_arys {onchans username unique}
+# nick_onchans($luser) -> [list ... $lchan ...]
+# nick_username($luser) -> <securely known local username>
+# nick_unique($luser) -> <counter>
+# nick_case($luser) -> $user  (valid even if no longer visible)
+
+# chan_nicks($lchan) -> [list ... $luser ...]
+
+proc lnick_forget {luser} {
+    global nick_arys chan_nicks
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($luser) av
+	catch { unset av }
+    }
+    foreach lch [array names chan_nicks] {
+	upvar #0 chan_nicks($lch) nlist
+	set nlist [grep tn {"$tn" != "$luser"} $nlist]
+	check_justme $lch
+    }
+}
+
+proc nick_forget {user} {
+    global nick_arys chan_nicks
+    lnick_forget [irctolower $user]
+    nick_case $user
+}
+
+proc nick_case {user} {
+    global nick_case
+    set nick_case([irctolower $user]) $user
+}
+
+proc msg_NICK {p c newnick} {
+    global nick_arys nick_case
+    prefix_nick
+    recordlastseen_n $n "changing nicks to $newnick" 0
+    recordlastseen_n $newnick "changing nicks from $n" 1
+    set luser [irctolower $n]
+    set lusernew [irctolower $newnick]
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($luser) old
+	upvar #0 nick_${ary}($lusernew) new
+	if {[info exists new]} { error "nick collision ?! $ary $n $newnick" }
+	if {[info exists old]} { set new $old; unset old }
+    }
+    upvar #0 nick_onchans($lusernew) oc
+    foreach ch $oc {
+	upvar #0 chan_nicks($ch) nlist
+	set nlist [grep tn {"$tn" != "$luser"} $nlist]
+	lappend nlist $lusernew
+    }
+    nick_case $newnick
+}
+
+proc nick_ishere {n} {
+    global nick_counter
+    upvar #0 nick_unique([irctolower $n]) u
+    if {![info exists u]} { set u [incr nick_counter].$n.[clock seconds] }
+    nick_case $n
+}
+
+proc msg_JOIN {p c chan} {
+    prefix_nick
+    recordlastseen_n $n "joining $chan" 1
+    set nl [irctolower $n]
+    set lchan [irctolower $chan]
+    upvar #0 nick_onchans($nl) oc
+    upvar #0 chan_nicks($lchan) nlist
+    lappend oc $lchan
+    lappend nlist $nl
+    nick_ishere $n
+}
+proc msg_PART {p c chan} {
+    prefix_nick
+    recordlastseen_n $n "leaving $chan" 1
+    process_kickpart $chan $n
+}
+proc msg_QUIT {p c why} {
+    prefix_nick
+    recordlastseen_n $n "leaving ($why)" 0
+    nick_forget $n
 }
 
 proc msg_PRIVMSG {p c dest text} {
     prefix_nick
-    if {[regexp {^[&#+!]} $dest]} {
-	set what "!..."
-	set them it
+    if {[ischan $dest]} {
+	recordlastseen_n $n "invoking me in $dest" 1
+	set output $dest
     } else {
-	set what "private messages"
-	set them them
+	recordlastseen_n $n "talking to me" 1
+	set output $n
+    }
+    nick_case $n
+
+    if {[catch {
+	regsub {^! *} $text {} text
+	set ucmd [ta_word]
+	set procname ucmd/[string tolower $ucmd]
+	if {[catch { info body $procname }]} {
+	    error "unknown command; try help for help"
+	}
+	$procname $p $dest
+    } rv]} {
+	sendprivmsg $n "error: $rv"
+    } else {
+	manyset $rv priv_msgs pub_msgs priv_acts pub_acts
+	foreach {td val} [list $n $priv_acts $output $pub_acts] {
+	    foreach l [split $val "\n"] {
+		sendaction_priority 0 $td $l
+	    }
+	}
+	foreach {td val} [list $n $priv_msgs $output $pub_msgs] {
+	    foreach l [split $val "\n"] {
+		sendprivmsg $td $l
+	    }
+	}
     }
-    sendout PRIVMSG $n \
-	    "I will respond to $what at some point; for now I just log $them."
 }
 
-if {![info exists sock]} {
-    set sock [socket $host $port]
+proc msg_INVITE {p c n chan} {
+    after 1000 [list dojoin [irctolower $chan]]
+}
+
+proc grep {var predicate list} {
+    set o {}
+    upvar 1 $var v
+    foreach v $list {
+	if {[uplevel 1 [list expr $predicate]]} { lappend o $v }
+    }
+    return $o
+}
+
+proc msg_353 {p c dest type chan nicklist} {
+    global names_chans nick_onchans
+    set lchan [irctolower $chan]
+    upvar #0 chan_nicks($lchan) nlist
+    lappend names_chans $lchan
+    if {![info exists nlist]} {
+	# We don't think we're on this channel, so ignore it !
+	# Unfortunately, because we don't get a reply to PART,
+	# we have to remember ourselves whether we're on a channel,
+	# and ignore stuff if we're not, to avoid races.  Feh.
+	return
+    }
+    set nlist_new {}
+    foreach user [split $nicklist { }] {
+	regsub {^[@+]} $user {} user
+	if {![string length $user]} continue
+	check_nick $user
+	set luser [irctolower $user]
+	upvar #0 nick_onchans($luser) oc
+	lappend oc $lchan
+	lappend nlist_new $luser
+	nick_ishere $user
+    }
+    set nlist $nlist_new
+}
+
+proc msg_366 {p c args} {
+    global names_chans nick_onchans
+    set lchan [irctolower $c]
+    foreach luser [array names nick_onchans] {
+	upvar #0 nick_onchans($luser) oc
+	if {[llength names_chans] > 1} {
+	    set oc [grep tc {[lsearch -exact $tc $names_chans] >= 0} $oc]
+	}
+	if {![llength $oc]} { lnick_forget $n }
+    }
+    unset names_chans
+}
+
+proc ta_anymore {} {
+    upvar 1 text text
+    return [expr {!![string length $text]}]
+}
+
+proc ta_nomore {} {
+    upvar 1 text text
+    if {[string length $text]} { error "too many parameters" }
+}
+
+proc ta_word {} {
+    upvar 1 text text
+    if {![regexp {^([^ 	]+) *(.*)} $text dummy firstword text]} {
+	error "too few parameters"
+    }
+    return $firstword
+}
+
+proc ta_nick {} {
+    upvar 1 text text
+    set v [ta_word]
+    check_nick $v
+    return $v
+}
+
+proc def_ucmd {cmdname body} {
+    proc ucmd/$cmdname {p dest} "    upvar 1 text text\n$body"
+}
+
+proc ucmdr {priv pub args} {
+    return -code return [concat [list $priv $pub] $args]
+}
+
+proc loadhelp {} {
+    global help_topics errorInfo
+
+    catch { unset help_topics }
+    set f [open helpinfos r]
+    try_except_finally {
+	set lno 0
+	while {[gets $f l] >= 0} {
+	    incr lno
+	    if {[regexp {^#.*} $l]} {
+	    } elseif {[regexp {^ *$} $l]} {
+		if {[info exists topic]} {
+		    set help_topics($topic) [join $lines "\n"]
+		    unset topic
+		    unset lines
+		}
+	    } elseif {[regexp {^\:\:} $l]} {
+	    } elseif {[regexp {^\:([-+._0-9a-z]*)$} $l dummy newtopic]} {
+		if {[info exists topic]} {
+		    error "help $newtopic while in $topic"
+		}
+		set topic $newtopic
+		set lines {}
+	    } elseif {[regexp {^[^:#]} $l]} {
+		set topic
+		regsub -all {([^\\])\!\$?} _$l {\1} l
+		regsub -all {\\(.)} $l {\1} l
+		regsub {^_} $l {} l
+		lappend lines [string trimright $l]
+	    } else {
+		error "eh ? $lno: $l"
+	    }
+	}
+	if {[info exists topic]} { error "unfinished topic $topic" }
+    } {
+	set errorInfo "in helpinfos line $lno\n$errorInfo"
+    } {
+	close $f
+    }
+}
+
+def_ucmd help {
+    upvar 1 n n
+
+    set topic [irctolower [string trim $text]]
+    if {[string length $topic]} {
+	set ontopic " on `$topic'"
+    } else {
+	set ontopic ""
+    }
+    if {[set lag [out_lagged]]} {
+	if {[ischan $dest]} { set replyto $dest } else { set replyto $n }
+	if {$lag > 1} {
+	    sendaction_priority 1 $replyto \
+		"is very lagged.  Please ask for help$ontopic again later."
+	    ucmdr {} {}
+	} else {
+	    sendaction_priority 1 $replyto \
+		"is lagged.  Your help$ontopic will arrive shortly ..."
+	}
+    }
+    
+    upvar #0 help_topics($topic) info
+    if {![info exists info]} { ucmdr "No help on $topic, sorry." {} }
+    ucmdr $info {}
+}
+
+def_ucmd ? {
+    global help_topics
+    ucmdr $help_topics() {}
+}
+
+proc check_username {target} {
+    if {
+	[string length $target] > 8 ||
+        [regexp {[^-0-9a-z]} $target] ||
+        ![regexp {^[a-z]} $target]
+    } { error "invalid username" }
+}
+
+proc somedb__head {} {
+    uplevel 1 {
+	set idl [irctolower $id]
+	upvar #0 ${nickchan}db($idl) ndbe
+	binary scan $idl H* idh
+	set idfn $fprefix$idh
+	if {![info exists iddbe] && [file exists $idfn]} {
+	    set f [open $idfn r]
+	    try_except_finally { set newval [read $f] } {} { close $f }
+	    if {[llength $newval] % 2} { error "invalid length" }
+	    set iddbe $newval
+	}
+    }
+}
+
+proc def_somedb {name arglist body} {
+    foreach {nickchan fprefix} {nick users/n chan chans/c} {
+	proc ${nickchan}db_$name $arglist \
+            "set nickchan $nickchan; set fprefix $fprefix; $body"
+    }
+}
+
+def_somedb list {} {
+    set list {}
+    foreach path [glob -nocomplain -path $fprefix *] {
+	binary scan $path "A[string length $fprefix]A*" afprefix thinghex
+	if {"$afprefix" != "$fprefix"} { error "wrong prefix $path $afprefix" }
+	lappend list [binary format H* $thinghex]
+    }
+    return $list
+}
+
+proc def_somedb_id {name arglist body} {
+    def_somedb $name [concat id $arglist] "somedb__head; $body"
+}
+
+def_somedb_id exists {} {
+    return [info exists iddbe]
+}
+
+def_somedb_id delete {} {
+    catch { unset iddbe }
+    file delete $idfn
+}
+
+set default_settings_nick {timeformat ks}
+set default_settings_chan {
+    autojoin 1
+    mode *
+    userinvite pub
+    topicset {}
+    topicsee {}
+    topictell {}
+}
+
+def_somedb_id set {args} {
+    upvar #0 default_settings_$nickchan def
+    if {![info exists iddbe]} { set iddbe $def }
+    foreach {key value} [concat $iddbe $args] { set a($key) $value }
+    set newval {}
+    foreach {key value} [array get a] { lappend newval $key $value }
+    set f [open $idfn.new w]
+    try_except_finally {
+	puts $f $newval
+	close $f
+	file rename -force $idfn.new $idfn
+    } {
+    } {
+	catch { close $f }
+    }
+    set iddbe $newval
+}
+
+def_somedb_id get {key} {
+    upvar #0 default_settings_$nickchan def
+    if {[info exists iddbe]} {
+	set l [concat $iddbe $def]
+    } else {
+	set l $def
+    }
+    foreach {tkey value} $l {
+	if {"$tkey" == "$key"} { return $value }
+    }
+    error "unset setting $key"
+}
+
+proc opt {key} {
+    global calling_nick
+    if {[info exists calling_nick]} { set n $calling_nick } { set n {} }
+    return [nickdb_get $n $key]
+}
+
+proc check_notonchan {} {
+    upvar 1 dest dest
+    if {[ischan $dest]} { error "that command must be sent privately" }
+}
+
+proc nick_securitycheck {strict} {
+    upvar 1 n n
+    if {![nickdb_exists $n]} { error "you are unknown to me, use `register'." }
+    set wantu [nickdb_get $n username]
+    if {![string length $wantu]} {
+	if {$strict} {
+	    error "that feature is only available to secure users, sorry."
+	} else {
+	    return
+	}
+    }
+    set luser [irctolower $n]
+    upvar #0 nick_username($luser) nu
+    if {![info exists nu]} {
+	error "nick $n is secure, you must identify yourself first."
+    }
+    if {"$wantu" != "$nu"} {
+	error "you are the wrong user - the nick $n belongs to $wantu, not $nu"
+    }
+}
+
+proc channel_securitycheck {channel n} {
+    # You must also call `nick_securitycheck 1'
+    set mgrs [chandb_get $channel managers]
+    if {[lsearch -exact [irctolower $mgrs] [irctolower $n]] < 0} {
+	error "you are not a manager of $channel"
+    }
+}
+
+proc def_chancmd {name body} {
+    proc channel/$name {} \
+	    "    upvar 1 target chan; upvar 1 n n; upvar 1 text text; $body"
+}
+
+proc ta_listop {findnow procvalue} {
+    # findnow and procvalue are code fragments which will be executed
+    # in the caller's level.  findnow should set ta_listop_ev to
+    # the current list, and procvalue should treat ta_listop_ev as
+    # a proposed value in the list and check and possibly modify
+    # (canonicalise?) it.  After ta_listop, ta_listop_ev will
+    # be the new value of the list.
+    upvar 1 ta_listop_ev exchg
+    upvar 1 text text
+    set opcode [ta_word]
+    switch -exact _$opcode {
+	_= { }
+	_+ - _- {
+	    uplevel 1 $findnow
+	    foreach item $exchg { set array($item) 1 }
+	}
+	default {
+	    error "list change opcode must be one of + - ="
+	}
+    }
+    foreach exchg [split $text " "] {
+	if {![string length $exchg]} continue
+	uplevel 1 $procvalue
+	if {"$opcode" != "-"} {
+	    set array($exchg) 1
+	} else {
+	    catch { unset array($exchg) }
+	}
+    }
+    set exchg [lsort [array names array]]
+}
+
+def_chancmd manager {
+    ta_listop {
+	if {[chandb_exists $chan]} {
+	    set ta_listop_ev [chandb_get $chan managers]
+	} else {
+	    set ta_listop_ev [list [irctolower $n]]
+	}
+    } {
+	check_nick $ta_listop_ev
+	set ta_listop_ev [irctolower $ta_listop_ev]
+    }
+    if {[llength $ta_listop_ev]} {
+	chandb_set $chan managers $ta_listop_ev
+	ucmdr "Managers of $chan: $ta_listop_ev" {}
+    } else {
+	chandb_delete $chan
+	ucmdr {} {} "forgets about managing $chan." {}
+    }
+}
+
+def_chancmd autojoin {
+    set yesno [ta_word]
+    switch -exact [string tolower $yesno] {
+	no { set nv 0 }
+	yes { set nv 1 }
+	default { error "channel autojoin must be `yes' or `no' }
+    }
+    chandb_set $chan autojoin $nv
+    ucmdr [expr {$nv ? "I will join $chan when I'm restarted " : \
+	    "I won't join $chan when I'm restarted "}] {}
+}
+
+def_chancmd userinvite {
+    set nv [string tolower [ta_word]]
+    switch -exact $nv {
+	pub { set txt "!invite will work for $chan, but it won't work by /msg" }
+	here { set txt "!invite and /msg invite will work, but only for users who are already on $chan." }
+	all { set txt "Any user will be able to invite themselves or anyone else to $chan." }
+	none { set txt "I will not invite anyone to $chan." }
+	default {
+	    error "channel userinvite must be `pub', `here', `all' or `none'
+	}
+    }
+    chandb_set $chan userinvite $nv
+    ucmdr $txt {}
+}
+
+def_chancmd topic {
+    set what [ta_word]
+    switch -exact $what {
+	leave {
+	    ta_nomore
+	    chandb_set $chan topicset {}
+	    ucmdr "I won't ever change the topic of $chan." {}
+	}
+	set {
+	    set t [string trim $text]
+	    if {![string length $t]} {
+		error "you must specific the topic to set"
+	    }
+	    chandb_set $chan topicset $t
+	    ucmdr "Whenever I'm alone on $chan, I'll set the topic to $t." {}
+	}
+	see - tell {
+	    ta_listop {
+		set ta_listop_ev [chandb_get $chan topic$what]
+	    } {
+		if {"$ta_listop_ev" != "*"} {
+		    if {![ischan $ta_listop_ev]} {
+			error "bad channel \`$ta_listop_ev' in topic $what"
+		    }
+		    set ta_listop_ev [irctolower $ta_listop_ev]
+		}
+	    }
+	    chandb_set $chan topic$what $ta_listop_ev
+	    ucmdr "Topic $what list for $chan: $ta_listop_ev" {}
+	}
+	default {
+	    error "unknown channel topic subcommand - see help channel"
+	}
+    }
+}
+
+def_chancmd mode {
+    set mode [ta_word]
+    if {"$mode" != "*" && ![regexp {^(([-+][imnpst]+)+)$} $mode mode]} {
+	error {channel mode must be * or match ([-+][imnpst]+)+}
+    }
+    chandb_set $chan mode $mode
+    if {"$mode" == "*"} {
+	ucmdr "I won't ever change the mode of $chan." {}
+    } else {
+	ucmdr "Whenever I'm alone on $chan, I'll set the mode to $mode." {}
+    }
+}
+
+def_chancmd show {
+    if {[chandb_exists $chan]} {
+	set l "Settings for $chan: autojoin "
+	append l [lindex {no yes} [chandb_get $chan autojoin]]
+	append l ", mode " [chandb_get $chan mode]
+	append l ", userinvite " [chandb_get $chan userinvite] "."
+	append l "\nManagers: "
+	append l [join [chandb_get $chan managers] " "]
+	foreach {ts sep} {see "\n" tell "  "} {
+	    set t [chandb_get $chan topic$ts]
+	    append l $sep
+	    if {[llength $t]} {
+		append l "Topic $ts list: $t."
+	    } else {
+		append l "Topic $ts list is empty."
+	    }
+	}
+	append l "\n"
+	set t [chandb_get $chan topicset]
+	if {[string length $t]} {
+	    append l "Topic to set: $t"
+	} else {
+	    append l "I will not change the topic."
+	}
+	ucmdr {} $l
+    } else {
+	ucmdr {} "The channel $chan is not managed."
+    }
+}
+
+proc channelmgr_monoop {} {
+    upvar 1 dest dest
+    upvar 1 text text
+    upvar 1 n n
+    upvar 1 p p
+    upvar 1 target target
+    global chan_nicks
+
+    prefix_nick
+
+    if {[ischan $dest]} { set target $dest }
+    if {[ta_anymore]} { set target [ta_word] }
+    ta_nomore
+    if {![info exists target]} {
+	error "you must specify, or invoke me on, the relevant channel"
+    }
+    if {![info exists chan_nicks([irctolower $target])]} {
+	error "I am not on $target."
+    }
+    if {![ischan $target]} { error "not a valid channel" }
+
+    if {![chandb_exists $target]} { error "$target is not a managed channel." }
+    nick_securitycheck 1
+    channel_securitycheck $target $n
+}
+
+def_ucmd op {
+    channelmgr_monoop
+    sendout MODE $target +o $n
+}
+
+def_ucmd leave {
+    channelmgr_monoop
+    doleave $target
+}
+
+def_ucmd invite {
+    global chan_nicks
+    
+    if {[ischan $dest]} {
+	set target $dest
+	set onchan 1
+    } else {
+	set target [ta_word]
+	set onchan 0
+    }
+    set ltarget [irctolower $target]
+    if {![ischan $target]} { error "$target is not a channel." }
+    if {![info exists chan_nicks($ltarget)]} { error "I am not on $target." }
+    set ui [chandb_get $ltarget userinvite]
+    if {"$ui" == "pub" && !$onchan} {
+	error "Invitations to $target must be made with !invite."
+    }
+    if {"$ui" != "all"} {
+	prefix_nick
+	if {[lsearch -exact $chan_nicks($ltarget) [irctolower $n]] < 0} {
+ error "Invitations to $target may only be made by a user on the channel."
+	}
+    }
+    if {"$ui" == "none"} {
+	error "Sorry, I've not been authorised to invite people to $target."
+    }
+    if {![ta_anymore]} {
+	error "You have to say who to invite."
+    }
+    set invitees {}
+    while {[ta_anymore]} {
+	set invitee [ta_word]
+	check_nick $invitee
+	lappend invitees $invitee
+    }
+    foreach invitee $invitees {
+	sendout INVITE $invitee $ltarget
+    }
+    set who [lindex $invitees 0]
+    switch -exact llength $invitees {
+	0 { error "zero invitees" }
+	1 { }
+	2 { append who " and [lindex $invitees 1]" }
+	* {
+	    set who [join [lreplace $invitees end end] ", "]
+	    append who " and [lindex $invitees [llength $invitees]]"
+	}
+    }
+    ucmdr {} "invites $who to $target."
+}
+
+def_ucmd channel {
+    if {[ischan $dest]} { set target $dest }
+    if {![ta_anymore]} {
+	set subcmd show
+    } else {
+	set subcmd [ta_word]
+    }
+    if {[ischan $subcmd]} {
+	set target $subcmd
+	if {![ta_anymore]} {
+	    set subcmd show
+	} else {
+	    set subcmd [ta_word]
+	}
+    }
+    if {![info exists target]} { error "privately, you must specify a channel" }
+    set procname channel/$subcmd
+    if {"$subcmd" != "show"} {
+	if {[catch { info body $procname }]} { error "unknown channel setting $subcmd" }
+	prefix_nick
+	nick_securitycheck 1
+	if {[chandb_exists $target]} {
+	    channel_securitycheck $target $n
+	} else {
+	    upvar #0 chan_initialop([irctolower $target]) io
+	    upvar #0 nick_unique([irctolower $n]) u
+	    if {![info exists io]} { error "$target is not a managed channel" }
+	    if {"$io" != "$u"} { error "you are not the interim manager of $target" }
+	    if {"$subcmd" != "manager"} { error "use `channel manager' first" }
+	}
+    }
+    channel/$subcmd
+}
+
+def_ucmd who {
+    if {[ta_anymore]} {
+	set target [ta_word]; ta_nomore
+	set myself 1
+    } else {
+	prefix_nick
+	set target $n
+	set myself [expr {"$target" != "$n"}]
+    }
+    set ltarget [irctolower $target]
+    upvar #0 nick_case($ltarget) ctarget
+    set nshow $target
+    if {[info exists ctarget]} {
+	upvar #0 nick_onchans($ltarget) oc
+	upvar #0 nick_username($ltarget) nu
+	if {[info exists oc]} { set nshow $ctarget }
+    }
+    if {![nickdb_exists $ltarget]} {
+	set ol "$nshow is not a registered nick."
+    } elseif {[string length [set username [nickdb_get $target username]]]} {
+	set ol "The nick $nshow belongs to the user $username."
+    } else {
+	set ol "The nick $nshow is registered (but not to a username)."
+    }
+    if {![info exists ctarget] || ![info exists oc]} {
+	if {$myself} {
+	    append ol "\nI can't see $nshow on anywhere."
+	} else {
+	    append ol "\nYou aren't on any channels with me."
+	}
+    } elseif {![info exists nu]} {
+	append ol "\n$nshow has not identified themselves."
+    } elseif {![info exists username]} {
+	append ol "\n$nshow has identified themselves as the user $nu."
+    } elseif {"$nu" != "$username"} {
+	append ol "\nHowever, $nshow is being used by the user $nu."
+    } else {
+	append ol "\n$nshow has identified themselves to me."
+    }
+    ucmdr {} $ol
+}
+
+def_ucmd register {
+    prefix_nick
+    check_notonchan
+    set old [nickdb_exists $n]
+    if {$old} { nick_securitycheck 0 }
+    set luser [irctolower $n]
+    switch -exact [string tolower [string trim $text]] {
+	{} {
+	    upvar #0 nick_username($luser) nu
+	    if {![info exists nu]} {
+		ucmdr {} \
+ "You must identify yourself before using `register'.  See `help identify', or use `register insecure'."
+	    }
+	    nickdb_set $n username $nu
+	    ucmdr {} {} "makes a note of your username." {}
+	}
+	delete {
+	    nickdb_delete $n
+	    ucmdr {} {} "forgets your nickname." {}
+	}
+	insecure {
+	    nickdb_set $n username {}
+	    if {$old} {
+		ucmdr {} "Security is now disabled for your nickname !"
+	    } else {
+		ucmdr {} "This is fine, but bear in mind that people will be able to mess with your settings.  Channel management features need a secure registration." "makes an insecure registration for your nick."
+	    }
+	}
+    }
+}
+
+proc timeformat_desc {tf} {
+    switch -exact $tf {
+	ks { return "Times will be displayed in seconds or kiloseconds." }
+	hms { return "Times will be displayed in hours, minutes, etc." }
+	default { error "invalid timeformat: $v" }
+    }
+}
+
+proc def_setting {opt show_body set_body} {
+    proc set_show/$opt {} "
+        upvar 1 n n
+        set opt $opt
+        $show_body"
+    if {![string length $set_body]} return
+    proc set_set/$opt {} "
+        upvar 1 n n
+        upvar 1 text text
+        set opt $opt
+        $set_body"
+}
+
+def_setting timeformat {
+    set tf [nickdb_get $n timeformat]
+    return "$tf: [timeformat_desc $tf]"
+} {
+    set tf [string tolower [ta_word]]
+    ta_nomore
+    set desc [timeformat_desc $tf]
+    nickdb_set $n timeformat $tf
+    ucmdr {} $desc
+}
+
+def_setting security {
+    set s [nickdb_get $n username]
+    if {[string length $s]} {
+	return "Your nick, $n, is controlled by the user $s."
+    } else {
+	return "Your nick, $n, is not secure."
+    }
+} {}
+
+def_ucmd set {
+    prefix_nick
+    check_notonchan
+    if {![nickdb_exists $n]} {
+	ucmdr {} "You are unknown to me and so have no settings.  (Use `register'.)"
+    }
+    if {![ta_anymore]} {
+	set ol {}
+	foreach proc [lsort [info procs]] {
+	    if {![regexp {^set_show/(.*)$} $proc dummy opt]} continue
+	    lappend ol [format "%-10s %s" $opt [set_show/$opt]]
+	}
+	ucmdr {} [join $ol "\n"]
+    } else {
+	set opt [ta_word]
+	if {[catch { info body set_show/$opt }]} {
+	    error "no setting $opt"
+	}
+	if {![ta_anymore]} {
+	    ucmdr {} "$opt [set_show/$opt]"
+	} else {
+	    nick_securitycheck 0
+	    if {[catch { info body set_set/$opt }]} {
+		error "setting $opt cannot be set with `set'"
+	    }
+	    set_set/$opt
+	}
+    }
+}
+
+def_ucmd identpass {
+    set username [ta_word]
+    set passmd5 [md5sum "[ta_word]\n"]
+    ta_nomore
+    prefix_nick
+    check_notonchan
+    set luser [irctolower $n]
+    upvar #0 nick_onchans($luser) onchans
+    if {![info exists onchans] || ![llength $onchans]} {
+	ucmdr "You must be on a channel with me to identify yourself." {}
+    }
+    check_username $username
+    exec userv --timeout 3 $username << "$passmd5\n" > /dev/null \
+	    irc-identpass $n
+    upvar #0 nick_username($luser) rec_username
+    set rec_username $username
+    ucmdr "Pleased to see you, $username." {}
+}
+
+def_ucmd summon {
+    set target [ta_word]
+    ta_nomore
+    check_username $target
+    prefix_nick
+
+    upvar #0 lastsummon($target) ls
+    set now [clock seconds]
+    if {[info exists ls]} {
+	set interval [expr {$now - $ls}]
+	if {$interval < 30} {
+	    ucmdr {} \
+ "Please be patient; $target was summoned only [showinterval $interval]."
+	}
+    }
+    regsub {^[^!]*!} $p {} path
+    if {[catch {
+	exec userv --timeout 3 $target irc-summon $n $path \
+		[expr {[ischan $dest] ? "$dest" : ""}] \
+		< /dev/null
+    } rv]} {
+	regsub -all "\n" $rv { / } rv
+	error $rv
+    }
+    if {[regexp {^problem (.*)} $rv dummy problem]} {
+	ucmdr {} "The user `$target' $problem."
+    } elseif {[regexp {^ok ([^ ]+) ([0-9]+)$} $rv dummy tty idlesince]} {
+	set idletime [expr {$now - $idlesince}]
+	set ls $now
+	ucmdr {} {} {} "invites $target ($tty[expr {
+	    $idletime > 10 ? ", idle for [showintervalsecs $idletime]" : ""
+	}]) to [expr {
+	    [ischan $dest] ? "join us here" : "talk to you"
+	}]."
+    } else {
+	error "unexpected response from userv service: $rv"
+    }
+}
+
+proc md5sum {value} { exec md5sum << $value }
+
+def_ucmd seen {
+    global lastseen nick
+    prefix_nick
+    set ncase [ta_nick]
+    set nlower [irctolower $ncase]
+    ta_nomore
+    set now [clock seconds]
+    if {"$nlower" == "[irctolower $nick]"} {
+	error "I am not self-aware."
+    } elseif {![info exists lastseen($nlower)]} {
+	set rstr "I've never seen $ncase."
+    } else {
+	manyset $lastseen($nlower) realnick time what
+	set howlong [expr {$now - $time}]
+	set string [showinterval $howlong]
+	set rstr "I last saw $realnick $string, $what."
+    }
+    if {[ischan $dest]} {
+	set where $dest
+    } else {
+	set where {}
+    }
+    upvar #0 lookedfor($nlower) lf
+    if {[info exists lf]} { set oldvalue $lf } else { set oldvalue {} }
+    set lf [list [list $now $n $where]]
+    foreach v $oldvalue {
+	if {"[irctolower [lindex $v 1]]" == "[irctolower $n]"} continue
+	lappend lf $v
+    }
+    ucmdr {} $rstr
+}
+
+proc ensure_globalsecret {} {
+    global globalsecret
+    
+    if {[info exists globalsecret]} return
+    set gsfile [open /dev/urandom r]
+    fconfigure $gsfile -translation binary
+    set globalsecret [read $gsfile 32]
+    binary scan $globalsecret H* globalsecret
+    close $gsfile
+    unset gsfile
+}
+
+proc ensure_outqueue {} {
+    out__vars
+    if {[info exists out_queue]} return
+    set out_creditms 0
+    set out_creditat [clock seconds]
+    set out_queue {}
+    set out_lag_reported 0
+    set out_lag_reportwhen $out_creditat
+}
+
+proc fail {msg} {
+    logerror "failing: $msg"
+    exit 1
+}
+
+proc ensure_connecting {} {
+    global sock ownfullname host port nick socketargs
+    global musthaveping_ms musthaveping_after
+    
+    if {[info exists sock]} return
+    set sock [eval socket $socketargs [list $host $port]]
     fconfigure $sock -buffering line
-    #fconfigure $sock -translation binary
     fconfigure $sock -translation crlf
 
-    sendout USER guest 0 * "chiark testing bot"
+    sendout USER blight 0 * $ownfullname
     sendout NICK $nick
     fileevent $sock readable onread
+
+    set musthaveping_after [after $musthaveping_ms \
+	    {fail "no ping within timeout"}]
+}
+
+proc connected {} {
+    global musthaveping_after
+
+    after cancel $musthaveping_after
+    unset musthaveping_after
+
+    foreach chan [chandb_list] {
+	if {[chandb_get $chan autojoin]} { dojoin $chan }
+    }
 }
 
-#if {![regexp {tclsh} $argv0]} {
-#    vwait terminate
-#}
+ensure_globalsecret
+ensure_outqueue
+loadhelp
+ensure_connecting