# $Id$
#
# Implementation of XEP-0033: Extended Stanza Addressing
#
# The sender address is rewritten, but the original address is stored
# in an additional <x/> element:
#
# <x xmlns='tkabber:xaddress:store' from='JID' reason='type'/>

set ::NS(xaddress) "http://jabber.org/protocol/address"
set ::NS(xaddress_store) "tkabber:xaddress:store"

namespace eval ::xaddress {
    set xaddrinfoid 0
    
    array set names [list \
			 ofrom     [::msgcat::mc "Original from"]     \
			 oto       [::msgcat::mc "Original to"]       \
			 replyto   [::msgcat::mc "Reply to"]          \
			 replyroom [::msgcat::mc "Reply to room"]     \
			 noreply   [::msgcat::mc "No reply"]          \
			 to        [::msgcat::mc "To"]                \
			 cc        [::msgcat::mc "Carbon copy"]       \
			 bcc       [::msgcat::mc "Blind carbon copy"] \
			]   
}

#######################################################
# Common procs

proc ::xaddress::parse_xaddress_fields {xe {elems {}}} {

    ::xmpp::xml::split $xe tag xmlns attrs cdata subels

    if {![string equal $xmlns $::NS(xaddress)]} {
	return {}
    }
    if {![string equal $tag addresses]} {
	return {}
    }

    set res {}
    
    foreach subel $subels {
	::xmpp::xml::split $subel stag sxmlns sattrs scdata ssubels
		
	if {![string equal $stag address]} continue

	set type [::xmpp::xml::getAttr $sattrs type] 
	if {[llength $elems] > 0 && [lsearch -exact $elems $type] < 0} continue

	set params {}
	foreach elem {jid node uri descr delivered} {
	    set value [::xmpp::xml::getAttr $sattrs $elem]
	    if {![string equal $value ""]} {
		lappend params $elem $value
	    }
	}

	lappend res $type $params
    }        
    return $res
}

proc ::xaddress::format_addressinfo_tooltip {type from real_from reason fields} {
    variable names
    set lines {}

    switch -- $reason {
	ofrom {
	    lappend lines \
		    [::msgcat::mc "This message was forwarded by %s\n" \
				  $real_from]
	}
	#replyto -
	#replyroom {
	#    lappend lines \
	#	    [::msgcat::mc "This message was sent by %s\n" $real_from]
	#}
    }

    lappend lines [::msgcat::mc "Extended addressing fields:"]
    foreach {type params} $fields {
	array set arparams $params
	
	if {[info exists names($type)]} {
	    set line " $names($type):"
	} else {
	    set line " $type:"
	}

	if {[info exists arparams(descr)]} {
	    append line " <$arparams(descr)>"
	}
	
	if {[info exists arparams(jid)]} {
	    append line " $arparams(jid)"
	    if {[info exists arparams(node)]} {	
		append line " [$arparams(node)]"
	    }    
	} elseif {[info exists arparams(uri)]} {
	    append line " $arparams(uri)"
	}

	lappend lines $line
	array unset arparams
    }
    return [join $lines "\n"]
}

######################################################
# Replace original jid. Read README.xaddress
proc ::xaddress::modify_from \
     {vxlib vfrom vid vtype vis_subject vsubject \
      vbody verr vthread vpriority vx} {
    upvar 2 $vfrom from
    upvar 2 $vtype type
    upvar 2 $vx x

    # those types are supported at now.
    if {[lsearch -exact {chat normal groupchat ""} $type] < 0} return

    set newx {}
    foreach xe $x {
	::xmpp::xml::split $xe tag xmlns attrs cdata subels
	
	if {[string equal $xmlns $::NS(xaddress_store)]} {
	    # The other side tries to forge a sender sddress
	} else {
	    lappend newx $xe
	}
    }

    set x $newx

    foreach xe $x {
	::xmpp::xml::split $xe tag xmlns attrs cdata subels
	
	if {[llength [set res [parse_xaddress_fields $xe {ofrom}]]] == 0} continue

	# FIX: now we get only first but what if there are several ofrom fields?
	lassign $res reason attrs1
	set ofrom [::xmpp::xml::getAttr $attrs1 jid]
	if {[string equal $ofrom ""]} return

	set x [linsert $x 0 [::xmpp::xml::create x \
				    -xmlns $::NS(xaddress_store) \
				    -attrs [list from $from \
						 reason $reason]]]
	set from $ofrom
	return
    }
}

hook::add rewrite_message_hook ::xaddress::modify_from

#####################################################################
# Draw special icon and tooltip for xaddress messages in the chat.

proc ::xaddress::draw_xaddress {chatid from type body x} {
    variable xaddrinfoid

    set chatw [chat::chat_win $chatid]

    set real_from ""
    set reason ""

    foreach xe $x {
	::xmpp::xml::split $xe tag xmlns attrs cdata subels
	
	if {[string equal $xmlns $::NS(xaddress_store)] && [string equal $tag x]} {
	    set real_from [::xmpp::xml::getAttr $attrs from]
	    set reason [::xmpp::xml::getAttr $attrs reason]
	    continue
	}

	if {[llength [set fields [parse_xaddress_fields $xe]]] == 0} continue
	
	incr xaddrinfoid
	set label \
	    [Label $chatw.xaddrinfo$xaddrinfoid \
		   -image xaddress/info/green \
		   -helptext [format_addressinfo_tooltip \
				  $type $from $real_from $reason $fields] \
		   -helptype balloon \
		   -bg [$chatw cget -background]]
	$chatw window create end -window $label

	break
    }
}

hook::add draw_message_hook ::xaddress::draw_xaddress 6

##########################################################
# Draw xaddress fields in the new message dialog

proc ::xaddress::process_x_data {rowvar bodyvar f x xlib from id type replyP} {
    upvar 2 $rowvar row
    upvar 2 $bodyvar body
    variable names

    if {!$replyP || [string equal $type error]} {
        return
    }

    set title [join [lrange [split $f .] 0 end-1] .].title
    
    foreach xe $x {
	::xmpp::xml::split $xe tag xmlns attrs cdata subels

	# if "from" was modified draw reason and real_from
	if {[string equal $xmlns $::NS(xaddress_store)] && [string equal $tag x]} {
	    set real_from [::xmpp::xml::getAttr $attrs from]
	    set reason [::xmpp::xml::getAttr $attrs reason]

	    switch -- $reason {
		ofrom {
		    grid [Label $title.flabel \
				-text [::msgcat::mc "Forwarded by:"]] \
			 -column 0 -row 2 -sticky e
		    grid [Label $title.fjid -text $real_from] \
			 -column 1 -row 2 -sticky w
		}
	    }
	    continue
	}
	
	if {[llength [set fields [parse_xaddress_fields $xe]]] == 0} continue
		
	# draw most important xaddress fields
	set other_fields {}
	foreach {type params} $fields {
	    array unset aparams
	    array set aparams $params
	    switch -- $type {
		noreply -
		replyroom -
		replyto {		    
		    if {![info exist aparams(jid)]} {
			lappend other_fields $type $params	    
			continue
		    }
		    
		    set text ""
		    if {[info exists aparams(descr)]} {
			append text "<$aparams(descr)> "
		    }
		    append text $aparams(jid)
		    if {[info exists aparams(node)]} {
			append text " [$aparams(node)]"
		    }
		    
		    grid [Label $f.lxaddr${row} \
				-text $names($type):] \
			-column 0 -row $row -sticky e
		    grid [Label $f.xaddr${row} -text $text] \
			-column 1 -row $row -sticky w
		    
		    incr row
		}
		default {
		    lappend other_fields $type $params
		}
	    }
	}
	
	# draw rest in tooltip
	if {[llength $other_fields] > 0} {
	    
	    set label \
		[Label $title.xaddrinfo \
		       -image xaddress/info/green \
		       -helptext [format_addressinfo_tooltip \
				      $type $from "" "" $other_fields] \
		       -helptype balloon \
		       -bg [$title cget -background]]
	    grid $label -row 1 -column 4 -sticky e

	}
    }
    return
}

hook::add message_process_x_hook ::xaddress::process_x_data

