+ return $o
+}
+
+proc msg_353 {p c dest type chan nicklist} {
+ global names_chans nick_onchans
+ if {![info exists names_chans]} { set names_chans {} }
+ set chan [irctolower $chan]
+ lappend names_chans $chan
+ foreach n [array names nick_onchans] {
+ upvar #0 nick_onchans($n) oc
+ set oc [grep tc {"$tc" != "$chan"} $oc]
+ }
+ foreach n [split $nicklist { }] {
+ regsub {^[@+]} $n {} n
+ check_nick $n
+ if {![string length $n]} continue
+ upvar #0 nick_onchans($n) oc
+ lappend oc $chan
+ }
+}
+
+proc msg_366 {p c args} {
+ global names_chans nick_onchans
+ if {[llength names_chans] > 1} {
+ foreach n [array names nick_onchans] {
+ upvar #0 nick_onchans($n) oc
+ set oc [grep tc {[lsearch -exact $tc $names_chans] >= 0} $oc]
+ if {![llength $oc]} { nick_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
+
+ catch { unset help_topics }
+ set f [open helpinfos r]
+ 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 $lines "\n"]
+ unset topic
+ unset lines
+ }
+ } elseif {[regexp {^!([-+._0-9a-z]*)$} $l dummy newtopic]} {
+ if {[info exists topic]} { error "help $newtopic while in $topic" }
+ set topic $newtopic
+ set lines {}
+ } elseif {[regexp {^[^!#]} $l]} {
+ set topic
+ lappend lines [string trimright $l]
+ } else {
+ error "eh ? $lno: $l"
+ }
+ }
+ if {[info exists topic]} { error "unfinished topic $topic" }
+}
+
+def_ucmd help {
+ upvar #0 help_topics([irctolower [string trim $text]]) info
+ if {![info exists info]} { ucmdr "No help on $text, sorry." {} }
+ ucmdr $info {}
+}
+
+def_ucmd ? {
+ global help_topics
+ ucmdr $help_topics() {}
+}
+
+proc manyset {list args} {
+ foreach val $list var $args {
+ upvar 1 $var my
+ set my $val
+ }
+}
+
+proc check_username {target} {
+ if {
+ [string length $target] > 8 ||
+ [regexp {[^-0-9a-z]} $target] ||
+ ![regexp {^[a-z]} $target]
+ } { error "invalid username" }
+}
+
+proc nickdb__head {} {
+ uplevel 1 {
+ set nl [irctolower $n]
+ upvar #0 nickdb($nl) ndbe
+ binary scan $nl H* nh
+ set nfn users/$nh
+ if {![info exists ndbe] && [file exists $nfn]} {
+ set f [file open $nfn r]
+ try_except_finally { set newval [read $f] } {} { close $f }
+ if {[llength $newval] % 2} { error "invalid length" }
+ set ndbe $newval
+ }
+ }
+}
+
+proc def_nickdb {name arglist body} {
+ proc nickdb_$name $arglist "nickdb__head; $body"
+}
+
+def_nickdb exists {n} {
+ return [info exists ndbe]
+}
+
+def_nickdb delete {n} {
+ catch { unset ndbe }
+ file delete $nfn
+}
+
+set default_settings {timeformat ks}
+
+def_nickdb set {n args} {
+ global default_settings
+ if {![info exists ndbe]} { set ndbe $default_settings }
+ foreach {key value} [concat $ndbe $args] { set a($key) $value }
+ set newval {}
+ foreach {key value} [array get a] { lappend newval $key $value }
+ set f [open $nfn.new w]
+ try_except_finally {
+ puts $f $newval
+ close $f
+ file rename -force $nfn.new $nfn
+ } {
+ catch { close $f }
+ } {
+ }
+ set ndbe $newval
+}
+
+def_nickdb opt {n key} {
+ global default_settings
+ if {[info exists ndbe]} {
+ set l $ndbe
+ } else {
+ set l $default_settings
+ }
+ foreach {tkey value} $l {
+ if {"$tkey" == "$key"} { return $value }
+ }
+ error "unset setting $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_opt $n username]
+ if {![string length $wantu]} {
+ if {$strict} {
+ error "that feature is only available to secure users, sorry."
+ } else {
+ return
+ }
+ }
+ upvar #0 nick_username($n) 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"
+ }
+}
+
+def_ucmd register {
+ prefix_nick
+ check_notonchan
+ set old [nickdb_exists $n]
+ if {$old} { nick_securitycheck 0 }
+ switch -exact [string tolower [string trim $text]] {
+ {} {
+ upvar #0 nick_username($n) nu
+ if {![info exists nu]} {
+ ucmdr {} \
+ "You must identify yourself before using `register'. See `help identify'."
+ }
+ 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 kiloseconds or seconds." }
+ 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_opt $n timeformat]
+ return "$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_opt $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 $n]} {
+ ucmdr {} "You are unknown to me and so have no settings."
+ }
+ if {![ta_anymore]} {
+ set ol {}
+ foreach proc [lsort [info procs]] {
+ if {![regexp {^set_show/(.*)$} $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/$opt]"
+ } else {
+ if {[catch { info body set_set/$opt }]} {
+ error "setting $opt cannot be set with `set'"
+ }
+ set_set/$opt
+ }
+ }
+}
+
+def_ucmd identpass {
+ set username [ta_word]
+ set passmd5 [md5sum [ta_word]]
+ ta_nomore
+ prefix_nick
+ check_notonchan
+ upvar #0 nick_onchans($n) 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 $n
+ upvar #0 nick_username($n) 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