X-Git-Url: https://git.distorted.org.uk/~mdw/ircbot/blobdiff_plain/7ce72032518e164fbcef80ed0c3b20b91a1a9d26..7a70431a07263946551183efcf340fdf7a91befd:/bot.tcl

diff --git a/bot.tcl b/bot.tcl
index 54cda63..967b095 100755
--- a/bot.tcl
+++ b/bot.tcl
@@ -3,6 +3,40 @@
 set host chiark
 set port 6667
 if {![info exists nick]} { set nick Blight }
+if {![info exists ownfullname]} { set ownfullname "here to Help" }
+set ownmailaddr blight@chiark.greenend.org.uk
+
+if {![info exists globalsecret]} {
+    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 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} {
     global sock
@@ -46,14 +80,15 @@ proc bgerror {msg} {
 }
 
 proc onread {args} {
-    global sock
+    global sock nick
     
     if {[gets $sock line] == -1} { set terminate 1; return }
-binary scan $line H* inhex; puts >$inhex<
     regsub -all "\[^ -\176\240-\376\]" $line ? line
     set org $line
     if {[regexp -nocase {^:([^ ]+) (.*)} $line dummy prefix remain]} {
 	set line $remain
+	if {[regexp {^([^!]+)!} $prefix dummy maybenick] &&
+	    "[irctolower $maybenick]" == "[irctolower $nick]"} return
     } else {
 	set prefix {}
     }
@@ -135,7 +170,9 @@ proc prefix_nick {} {
     upvar 1 n n
     if {![regexp {^([^!]+)!} $p dummy n]} { error "not from nick" }
     check_nick $n
-    if {"[irctolower $n]" == "[irctolower $nick]"} { error "from myself" }
+    if {"[irctolower $n]" == "[irctolower $nick]"} {
+	error "from myself" {} {}
+    }
 }
 
 proc showintervalsecs {howlong} {
@@ -303,15 +340,68 @@ proc msg_MODE {p c dest modelist args} {
     }
 }
 
+proc process_kickpart {chan user} {
+    check_nick $user
+    if {![ischan $chan]} { error "not a channel" }
+
+    upvar #0 nick_onchans($user) oc
+    set lc [irctolower $chan]
+    set oc [grep tc {"$tc" != "$lc"} $oc]
+}    
+
+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_arys {onchans username}
+
+proc nick_forget {n} {
+    global nick_arys
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($n) av
+	catch { unset av }
+    }
+}
+
 proc msg_NICK {p c newnick} {
+    global nick_arys
     prefix_nick
     recordlastseen_n $n "changing nicks to $newnick" 0
     recordlastseen_n $newnick "changing nicks from $n" 1
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($n) old
+	upvar #0 nick_${ary}($newnick) new
+	if {[info exists new]} { error "nick collision ?! $ary $n $newnick" }
+	if {[info exists old]} { set new $old; unset old }
+    }
 }
 
-proc msg_JOIN {p c chan} { recordlastseen_p $p "joining $chan" 1 }
-proc msg_PART {p c chan} { recordlastseen_p $p "leaving $chan" 1 }
-proc msg_QUIT {p c why} { recordlastseen_p $p "leaving ($why)" 0 }
+proc msg_JOIN {p c chan} {
+    prefix_nick
+    recordlastseen_n $n "joining $chan" 1
+    upvar #0 nick_onchans($n) oc
+    lappend oc [irctolower $chan]
+}
+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
@@ -335,19 +425,62 @@ proc msg_PRIVMSG {p c dest text} {
 	sendprivmsg $n "error: $rv"
     } else {
 	manyset $rv priv_msgs pub_msgs priv_acts pub_acts
-	foreach {td val} [list $n $priv_msgs $output $pub_msgs] {
+	foreach {td val} [list $n $priv_acts $output $pub_acts] {
 	    foreach l [split $val "\n"] {
-		sendprivmsg $td $l
+		sendaction $td $l
 	    }
 	}
-	foreach {td val} [list $n $priv_acts $output $pub_acts] {
+	foreach {td val} [list $n $priv_msgs $output $pub_msgs] {
 	    foreach l [split $val "\n"] {
-		sendaction $td $l
+		sendprivmsg $td $l
 	    }
 	}
     }
 }
 
+proc msg_INVITE {p c n chan} {
+    after 1000 [list sendout JOIN $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
+    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_nomore {} {
     upvar 1 text text
     if {[string length $text]} { error "too many parameters" }
@@ -375,14 +508,45 @@ proc def_ucmd {cmdname 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 {
-    ta_nomore
-    ucmdr \
-{Commands currently understood:
-help              get this list of commands
-seen <nick>       ask after someone (I'll tell them you asked)
-summon <username> invite a logged-on user onto IRC} {}
+    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} {
@@ -392,14 +556,152 @@ proc manyset {list args} {
     }
 }
 
-def_ucmd summon {
-    set target [ta_word]
-    ta_nomore
+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."
+	    }
+	}
+    }
+}	    
+
+def_ucmd identpass {
+    set username [ta_word]
+    set passmd5 [md5sum [ta_word]]
+    ta_nomore
+    prefix_nick
+    check_isprivmsg
+    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
@@ -421,7 +723,7 @@ def_ucmd summon {
 	error $rv
     }
     if {[regexp {^problem (.*)} $rv dummy problem]} {
-	ucmdr {} "$target $problem."
+	ucmdr {} "The user `$target' $problem."
     } elseif {[regexp {^ok ([^ ]+) ([0-9]+)$} $rv dummy tty idlesince]} {
 	set idletime [expr {$now - $idlesince}]
 	set ls $now
@@ -435,6 +737,8 @@ def_ucmd summon {
     }
 }
 
+proc md5sum {value} { exec md5sum << $value }
+
 def_ucmd seen {
     global lastseen nick
     prefix_nick
@@ -473,11 +777,13 @@ if {![info exists sock]} {
     #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
 }
 
+loadhelp
+
 #if {![regexp {tclsh} $argv0]} {
 #    vwait terminate
 #}