# $Id: PlaceAccessControl.xotcl,v 1.6 2006/09/25 08:29:04 neumann Exp $

package provide xotcl::actiweb::placeAccessControl 0.8

package require xotcl::comm::httpd
package require xotcl::actiweb::httpPlace

package require XOTcl

#
# Simple Object Pwd Protection with BasicAccessControl
#
#Usage example:
#ConferenceOrgPlace confPlace -port $placeport -root [pwd] \
    #  -mixin PlaceAccessControl
#
#confPlace protect conference.html [confData set password]
#
#confPlace setPasswd conference.html xxx

namespace eval ::xotcl::actiweb::placeAccessControl {
    namespace import ::xotcl::*

    Class ObjectAccessControl -superclass BasicAccessControl

    ObjectAccessControl instproc protectedResource {fn method varAuthMethod varRealm} {
	# check whether access to $fn via $method is protected
	upvar [self callinglevel] $varAuthMethod authMethod $varRealm realm
	my instvar root
	# we check only the current directory, not the parent directories
	set call [url decodeItem $fn]
	regsub "^$root" $call "" call
	set call [string trimleft $call /]
	set call [string trimleft $call :]
	regexp {^([^ ]*)} $call _ call
	set call "$root/$call"

	foreach i [list $call $call:$method] {
	    #puts stderr "check <$i>"
	    if {[my exists protected($i)]} {
		set realm [my set protected($i)]
		set authMethod Basic
		return 1
	    }
	}
	return 0
    }

    Class PlaceAccessControl
    PlaceAccessControl instproc init args {
	next
	[self]::httpd mixin add ObjectAccessControl
	[self]::httpd initWorkerMixins
    }

    PlaceAccessControl instproc protect {objName id pwd} {
	set objName [string trimleft $objName :]
	[self]::httpd protectDir $objName $objName {}
	if {$pwd ne ""} {
	    my setPassword $objName $id $pwd
	} 
    }

    PlaceAccessControl instproc credentialsNotOk {credentials authMethod realm} {
	#my instvar passwd
	#parray passwd
	next
    }

    PlaceAccessControl instproc setPassword {realm id pwd} {
	set httpd [self]::httpd 
	if {[$httpd exists passwd($realm:$id)]} {
	    $httpd unset passwd($realm:$id)
	    $httpd set passwd($realm:$id) $pwd
	} else {
	    $httpd addRealmEntry $realm "$id $pwd"
	}
	#$httpd set passwd($realm:admin) nimda
    }
    PlaceAccessControl instproc removeID {realm id} {
	set httpd [self]::httpd
	if {[$httpd exists passwd($realm:$id)]} {
	    $httpd unset passwd($realm:$id)
	}
    }

    namespace export ObjectAccessControl PlaceAccessControl
}

namespace import ::xotcl::actiweb::placeAccessControl::*