if 0 {[Richard Suchenwirth] 2004-12-05 - Here's a slight rewrite of [SS]' minimal [IRC] client (see that page) - adding
   * indentation
   * user names in bold
   * other messages in italic
   * own posts are marked in blue as a rudimentary color scheme

[http://mini.net/files/irc.gif]

Still, it was only 38 LOC, last time I looked :)
}
 package require Tk
 set ::server irc.freenode.org
 set ::chan   #tcl
 set ::me     $tcl_platform(user)
 text .t -height 30 -wrap word -font {Arial 9}
 .t tag config bold   -font [linsert [.t cget -font] end bold]
 .t tag config italic -font [linsert [.t cget -font] end italic]
 .t tag config blue   -foreground blue
 entry .cmd
 pack .cmd -side bottom -fill x
 pack .t -fill both -expand 1
 bind .cmd <Return> post
 proc recv {} {
     gets $::fd line
     if {[regexp {:([^!]*)![^ ].* +PRIVMSG ([^ :]+) +:(.*)} $line -> \
         nick target msg]} {
         set tag ""
         if [regexp {\001ACTION(.+)\001} $msg -> msg] {set tag italic}
         if {$nick eq "ijchain"} {regexp {<([^>]+)>(.+)} $msg -> nick msg}
        .t insert end $nick\t bold $msg\n $tag
     } else {.t insert end $line\n italic}
     .t yview end
 }
 proc post {} {
     set msg [.cmd get]
     if [regexp {^/me (.+)} $msg -> action] {set msg "\001ACTION $action\001"}
     foreach line [split $msg \n] {send "PRIVMSG $::chan :$line"}
     .cmd delete 0 end
     set tag ""
     if [regexp {\001ACTION(.+)\001} $msg -> msg] {set tag italic}
     .t insert end $::me\t {bold blue} $msg\n [list blue $tag]
     .t yview end
 }
 proc send str {puts $::fd $str; flush $::fd}
 set ::fd [socket $::server 6667]
 send "NICK $::me"
 send "USER $::me 0 * :PicoIRC user"
 send "JOIN $::chan"
 fileevent $::fd readable recv 

 bind . <Escape> {exec wish $argv0 &; exit}

----
[SS] the following is a new version that adds support for private query, nick colorization using an hash function, the /join, /nick, /names, /msg, /quit commands,
auto resolution of nick collisions, colorized user list on join. Not as short as the first versions we wrote, but considering the feature set this script
continues to show that Tcl is great to get a lot with little work.

 package require Tk
 set ::registered 0
 set ::joined 0
 set ::server irc.freenode.org
 set ::chan   #tcl
 set ::me     $tcl_platform(user)
 set ::meseq  0 ;# sequencial number to add to the NICK if the previous was busy
 set ::names {}
 text .t -height 30 -wrap word -font {Arial 9} -background white
 .t tag config bold   -font [linsert [.t cget -font] end bold]
 .t tag config italic -font [linsert [.t cget -font] end italic]
 set ::colors {red blue darkgreen black darkcyan darkmagenta}
 foreach color $::colors {
     .t tag config $color -foreground $color
 }
 entry .cmd -background white
 pack .cmd -side bottom -fill x
 pack .t -fill both -expand 1
 bind .cmd <Return> post
 focus .cmd
 
 proc nickcolor nick {
     binary scan $nick c* v
     set hash 4817
     set op +
     foreach x $v {
 	set hash [expr "$hash $op $x"]
 	set op [if {$op eq {+}} {concat *} {concat +}]
     }
     set hash [expr {$hash%[llength $::colors]}]
     lindex $::colors $hash
 }
 
 proc shownames {} {
     .t insert end "\nNames:\n" bold
     set i 0
     foreach n $::names {
 	if {$i == 0} {
 	    .t insert end [string repeat " " 8]
 	}
 	.t insert end "$n " [nickcolor $n]
 	if {[incr i] eq 5} {
 	    .t insert end "\n"
 	    set i 0
 	}
     }
     if {$i} {.t insert end "\n\n"}
     .t yview end
 }
 
 proc recv {} {
     gets $::fd line
     puts $line
     if {[regexp {:([^!]*)![^ ].* +PRIVMSG ([^ :]+) +:(.*)} $line -> \
         nick target msg]} {
         set tag ""
         if {$nick eq "ijchain"} {regexp {<([^>]+)>(.+)} $msg -> nick msg}
         if [regexp {\001ACTION(.+)\001} $msg -> msg] {
 	    set msg "$nick $msg"
 	    set nick "*"
 	    set tag {bold darkgreen}
 	    set nicktag bold
 	} else {
 	    set nicktag [nickcolor $nick]
 	}
 	if {[string index $target 0] ne {#}} {
 	    set nick "=== $nick ==="
 	    lappend nicktag bold
 	}
        .t insert end $nick\t $nicktag $msg\n $tag
     } elseif {[regexp {^:([^ ]+) +([^ ]+) +([^ ]+) +(.*)} $line -> \
                server code target rest]} \
     {
 	switch -- $code {
 	    001 {
 		set ::registered 1
 	    }
 	    433 {
 		set seqlen [string length [incr ::meseq]]
 		set ::me [string range $::me 0 [expr 8-$seqlen]]$::meseq
 		send "NICK $::me"
 	    }
 	    353 {
 		if {[regexp {[^:]*:(.*)} $rest -> nameslist]} {
 		    foreach name $nameslist {
 			lappend ::names $name
 		    }
 		}
 	    }
 	    366 {
 		shownames
 		set ::names {}
 	    }
 	}
 	.t insert end $line\n italic
     } else {
 	.t insert end $line\n italic
     }
     .t yview end
 }
 
 proc usererr msg {
     .t insert end "--- $msg\n" {bold red}
     .t yview end
 }
 
 proc post {} {
     set msg [.cmd get]
     .cmd delete 0 end
     if [regexp {^/([^ ]+) *(.*)} $msg -> cmd msg] {
 	switch -- $cmd {
 	    me {set msg "\001ACTION $msg\001"}
 	    nick {send "NICK $msg"; set ::me $msg}
 	    quit {send "QUIT $msg"; exit}
 	    names {send "NAMES $::chan"}
 	    quote {send $msg}
 	    join {
 		send "PART $::chan"
 		send "JOIN $msg"
 		set ::chan $msg
 	    }
 	    msg {
 		if {[regexp {([^ ]+) +(.*)} $msg -> target querymsg]} {
 		    send "PRIVMSG $target :$msg"
 		    set tags [list [nickcolor $target] bold]
 		    set target ">>> $target <<<"
 		    .t insert end $target\t $tags $querymsg\n {black bold}
 		    .t yview end
 		}
 	    }
 	    default {usererr "unknown command /$cmd"}
 	}
 	if {$cmd ne {me} || $cmd eq {msg}} return
     }
     if [regexp {^/me (.+)} $msg -> action] {set msg "\001ACTION $action\001"}
     foreach line [split $msg \n] {send "PRIVMSG $::chan :$line"}
     set tag ""
     if [regexp {\001ACTION(.+)\001} $msg -> msg] {set tag italic}
     .t insert end $::me\t {bold blue} $msg\n [list blue $tag]
     .t yview end
 }
 
 proc send str {
     puts $::fd $str
     flush $::fd
 }
 
 proc cron {} {
     if {!$::joined && $::registered} {
 	send "JOIN $::chan"
 	set ::joined 1
     }
     after 2000 cron
 }
 
 set ::fd [socket $::server 6667]
 send "NICK $::me"
 send "USER $::me 0 * :PicoIRC user"
 send "JOIN $::chan"
 
 fileevent $::fd readable recv
 bind . <Escape> {exec wish $argv0 &; exit}
 cron

----
[Category Application]
[Category Internet]