--- rat/lonuserstate.pm	2003/10/29 21:50:41	1.65
+++ rat/lonuserstate.pm	2004/04/26 19:16:45	1.77
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Construct and maintain state and binary representation of course for user
 #
-# $Id: lonuserstate.pm,v 1.65 2003/10/29 21:50:41 www Exp $
+# $Id: lonuserstate.pm,v 1.77 2004/04/26 19:16:45 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -41,6 +41,7 @@ use Apache::lonmsg;
 use Safe;
 use Safe::Hole;
 use Opcode;
+use Apache::lonenc;
 
 # ---------------------------------------------------- Globals for this package
 
@@ -52,6 +53,8 @@ my $errtext; # variable with all errors
 my $retfurl; # variable with the very first URL in the course
 my %randompick; # randomly picked resources
 my %randompickseed; # optional seed for randomly picking resources
+my %encurl; # URLs in this folder are supposed to be encrypted
+my %hiddenurl; # this URL (or complete folder) is supposed to be hidden
 
 # ----------------------------------- Remove version from URL and store in hash
 
@@ -74,6 +77,9 @@ sub putinversion {
     if ($hash{'version_'.$uri}) {
 	my $version=$hash{'version_'.$uri};
 	if ($version eq 'mostrecent') { return $uri; }
+	if ($version eq &Apache::lonnet::getversion(
+			&Apache::lonnet::filelocation('',$uri))) 
+	             { return $uri; }
 	$uri=~s/\.(\w+)$/\.$version\.$1/;
     }
     return $uri;
@@ -154,23 +160,27 @@ sub loadmap {
                         if ($token->[2]->{'external'} eq 'true') { # external
                             $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
                         } elsif ($turi=~/^\/*uploaded\//) { # uploaded
-			    if (($embstyle eq 'img') || ($embstyle eq 'emb')
-                             || ($embstyle eq 'ssi')) {
+			    if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
                                 $turi='/adm/wrapper'.$turi;
                             } elsif ($turi!~/\.(sequence|page)$/) {
 				$turi='/adm/coursedocs/showdoc'.$turi;
                             }
-                        } else { # normal internal resource
-                           if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
-			       $turi='/adm/wrapper'.$turi;
-                           }
+                        } elsif ($turi=~/\S/) { # normal non-empty internal resource
+			    my $mapdir=$uri;
+			    $mapdir=~s/[^\/]+$//;
+			    $turi=&Apache::lonnet::hreflocation($mapdir,$turi);
+			    if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
+				$turi='/adm/wrapper'.$turi;
+			    }
                         }
 		    }
-
-                    if (defined($hash{'ids_'.$turi})) {
-                        $hash{'ids_'.$turi}.=','.$rid;
+# Store reverse lookup, remove query string
+		    my $idsuri=$turi;
+		    $idsuri=~s/\?.+$//;
+                    if (defined($hash{'ids_'.$idsuri})) {
+                        $hash{'ids_'.$idsuri}.=','.$rid;
                     } else {
-                        $hash{'ids_'.$turi}=''.$rid;
+                        $hash{'ids_'.$idsuri}=''.$rid;
                     }
                
                     if
@@ -266,15 +276,25 @@ sub loadmap {
                     } else {
                         $hash{'param_'.$referid}=''.$newparam;
                     }
-                    if ($token->[2]->{'name'} eq 'parameter_mapalias') {
+                    if ($token->[2]->{'name'}=~/^parameter_(0_)*mapalias$/) {
 			$hash{'mapalias_'.$token->[2]->{'value'}}=$referid;
                     }
-                    if ($token->[2]->{'name'} eq 'parameter_randompick') {
+                    if ($token->[2]->{'name'}=~/^parameter_(0_)*randompick$/) {
 			$randompick{$referid}=$token->[2]->{'value'};
                     }
-                    if ($token->[2]->{'name'} eq 'parameter_randompickseed') {
+                    if ($token->[2]->{'name'}=~/^parameter_(0_)*randompickseed$/) {
 			$randompick{$referid}=$token->[2]->{'value'};
                     }
+                    if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) {
+			if ($token->[2]->{'value'}=~/^yes$/i) {
+			    $encurl{$referid}=1;
+			}
+                    }
+                    if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) {
+			if ($token->[2]->{'value'}=~/^yes$/i) {
+			    $hiddenurl{$referid}=1;
+			}
+                    }
                 } 
 
             }
@@ -309,10 +329,16 @@ sub simplify {
 # -------------------------------------------------------- Build condition hash
 
 sub traceroute {
-    my ($sofar,$rid,$beenhere)=@_;
+    my ($sofar,$rid,$beenhere,$encflag,$hdnflag)=@_;
     $sofar=simplify($sofar);
     unless ($beenhere=~/\&$rid\&/) {
        $beenhere.=$rid.'&';  
+       if ($hdnflag) {
+	   $hiddenurl{$rid}=1;
+       }
+       if ($encflag) {
+	   $encurl{$rid}=1;
+       }
        if (($retfurl eq '') && ($hash{'src_'.$rid})
         && ($hash{'src_'.$rid}!~/\.sequence$/)) {
            my ($mapid,$resid)=split(/\./,$rid);
@@ -331,7 +357,9 @@ sub traceroute {
        }
        if (defined($hash{'is_map_'.$rid})) {
            if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) {
-	       &traceroute($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},'&');
+	       &traceroute($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},'&',
+			   $encflag || $encurl{$rid},
+			   $hdnflag || $hiddenurl{$rid});
                if (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) {
 		   $sofar=
                   $hash{'conditions_'.$hash{'map_finish_'.$hash{'src_'.$rid}}};
@@ -350,7 +378,7 @@ sub traceroute {
                                  .$hash{'undercond_'.$_}.'. ';
                    }
                 }
-                &traceroute($further,$hash{'goesto_'.$_},$beenhere);
+                &traceroute($further,$hash{'goesto_'.$_},$beenhere,$encflag,$hdnflag);
           }
        }
     }
@@ -444,9 +472,9 @@ sub accinit {
                             "request.course.uri" => $courseuri); 
 }
 
-# ------------------------------------- Selectively delete from randompick maps
+# ---------------- Selectively delete from randompick maps and hidden url parms
 
-sub pickrandom {
+sub hiddenurls {
     my $randomoutentry='';
     foreach my $rid (keys %randompick) {
         my $rndpick=$randompick{$rid};
@@ -488,6 +516,18 @@ sub pickrandom {
             }
         }
     }
+# ------------------------------ take care of explicitly hidden urls or folders
+    foreach my $rid (keys %hiddenurl) {
+	$hash{'randomout_'.$rid}=1;
+	my ($mapid,$resid)=split(/\./,$rid);
+	$randomoutentry.='&'.
+	    &Apache::lonnet::symbclean(
+		         &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
+				       '___'.$resid.'___'.
+		    &Apache::lonnet::declutter($hash{'src_'.$rid})
+				       ).'&';
+    }
+# --------------------------------------- append randomout entry to environment
     if ($randomoutentry) {
 	&Apache::lonnet::appenv('acc.randomout' => $randomoutentry);
     }
@@ -513,6 +553,8 @@ sub readmap {
    unlink($fn.'.state');
    unlink($fn.'parms.db');
    undef %randompick;
+   undef %hiddenurl;
+   undef %encurl;
    $retfurl='';
    if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
        (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
@@ -530,7 +572,7 @@ sub readmap {
     if (defined($hash{'map_start_'.$uri})) {
         &traceroute('0',$hash{'map_start_'.$uri},'&');
         &accinit($uri,$short,$fn);
-        &pickrandom();
+        &hiddenurls();
     }
 # ------------------------------------------------------- Put versions into src
     foreach (keys %hash) {
@@ -538,10 +580,17 @@ sub readmap {
 	    $hash{$_}=&putinversion($hash{$_});
 	}
     }
+# ---------------------------------------------------------------- Encrypt URLs
+    foreach (keys %encurl) {
+	$hash{'src_'.$_}=&Apache::lonenc::encrypted($hash{'src_'.$_});
+    }
+# ----------------------------------------------- Close hashes to finally store
+# --------------------------------- Routine must pass this point, no early outs
     unless ((untie(%hash)) && (untie(%parmhash))) {
       &Apache::lonnet::logthis("<font color=blue>WARNING: ".
                        "Could not untie coursemap $fn for $uri.</font>"); 
     }
+# ---------------------------------------------------- Store away initial state
     {
      my $cfh;
      if ($cfh=Apache::File->new(">$fn.state")) {