--- rat/lonuserstate.pm	2003/03/25 22:50:14	1.57
+++ rat/lonuserstate.pm	2003/12/15 15:26:26	1.69
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Construct and maintain state and binary representation of course for user
 #
-# $Id: lonuserstate.pm,v 1.57 2003/03/25 22:50:14 albertel Exp $
+# $Id: lonuserstate.pm,v 1.69 2003/12/15 15:26:26 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,22 +25,6 @@
 #
 # http://www.lon-capa.org/
 #
-# (Server for RAT Maps
-#
-# (Edit Handler for RAT Maps
-# (TeX Content Handler
-#
-# YEAR=2000
-# 05/29/00,05/30 Gerd Kortemeyer)
-# 7/1 Gerd Kortemeyer)
-# 7/1,7/3,7/4,7/7,7/8,7/10 Gerd Kortemeyer)
-#
-# 7/15,7/17,7/18,8/1,8/2,8/4,8/5,8/21,8/22,8/23,8/30,
-# 9/2,9/4,9/29,9/30,10/2,10/11,10/30,10/31,
-# 11/1,11/2,11/14,11/16,11/22,12/28,
-# YEAR=2001
-# 07/05/01,08/30,08/31 Gerd Kortemeyer
-#
 ###
 
 package Apache::lonuserstate;
@@ -68,10 +52,48 @@ 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 %actualversion; # version of resource as loaded now
-my %setversion; # forced version of resource
-my %lastversion; # version when CC came in last
-my $versionmode; # how versioning is handled in this course
+
+# ----------------------------------- Remove version from URL and store in hash
+
+sub versiontrack {
+    my $uri=shift;
+    if ($uri=~/\.(\d+)\.\w+$/) {
+	my $version=$1;
+	$uri=~s/\.\d+\.(\w+)$/\.$1/;
+        unless ($hash{'version_'.$uri}) {
+	    $hash{'version_'.$uri}=$version;
+	}
+    }
+    return $uri;
+}
+
+# -------------------------------------------------------------- Put in version
+
+sub putinversion {
+    my $uri=shift;
+    if ($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;
+}
+
+# ----------------------------------------- Processing versions file for course
+
+sub processversionfile {
+    my %cenv=@_;
+    my %versions=&Apache::lonnet::dump('resourceversions',
+				       $cenv{'domain'},
+				       $cenv{'num'});
+    foreach (keys %versions) {
+	if ($_=~/^error\:/) { return; }
+	$hash{'version_'.$_}=$versions{$_};
+    }
+}
 
 # --------------------------------------------------------- Loads map from disk
 
@@ -85,7 +107,7 @@ sub loadmap {
     $hash{'map_id_'.$lpc}=$uri;
 
 # Determine and check filename
-    my $fn=&Apache::lonnet::filelocation('',$uri);
+    my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
 
     my $ispage=($fn=~/\.page$/);
 
@@ -119,13 +141,16 @@ sub loadmap {
 
                     $hash{'kind_'.$rid}='res';
                     $hash{'title_'.$rid}=$token->[2]->{'title'};
-                    my $turi=$token->[2]->{'src'};
-                    $Apache::lonnet::titlecache{
-		     &Apache::lonnet::symbclean(
-                      &Apache::lonnet::declutter($uri).'___'.
-                      $token->[2]->{'id'}.'___'.
-		      &Apache::lonnet::declutter($turi))}=
-                          $token->[2]->{'title'};
+                    my $turi=&versiontrack($token->[2]->{'src'});
+                    if ($token->[2]->{'version'}) {
+			unless ($hash{'version_'.$turi}) {
+			    $hash{'version_'.$turi}=$1;
+			}
+		    }
+		    &Apache::lonnet::do_cache(\%Apache::lonnet::titlecache,
+		       &Apache::lonnet::encode_symb($uri,$token->[2]->{'id'},
+						    $turi),
+					      $token->[2]->{'title'},'title');
                     unless ($ispage) {
                         $turi=~/\.(\w+)$/;
                         my $embstyle=&Apache::loncommon::fileembstyle($1);
@@ -138,10 +163,13 @@ sub loadmap {
                             } elsif ($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) { # 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;
+			    }
                         }
 		    }
 
@@ -227,12 +255,17 @@ sub loadmap {
 # ------------------------------------------------------------------- Parameter
 
                     my $referid=$lpc.'.'.$token->[2]->{'to'};
-                    my $part=$token->[2]->{'part'};
-                    unless ($part) { $part=0; }
+		    my $name=$token->[2]->{'name'};
+		    my $part;
+		    if ($name=~/^parameter_(.*)_/) {
+			$part=$1;
+		    } else {
+			$part=0;
+		    }
+		    $name=~s/^.*_([^_]*)$/$1/;
                     my $newparam=
 			&Apache::lonnet::escape($token->[2]->{'type'}).':'.
-			&Apache::lonnet::escape($part.'.'.
-                         $token->[2]->{'name'}).'='.
+			&Apache::lonnet::escape($part.'.'.$name).'='.
 			&Apache::lonnet::escape($token->[2]->{'value'});
                     if (defined($hash{'param_'.$referid})) {
                         $hash{'param_'.$referid}.='&'.$newparam;
@@ -443,7 +476,7 @@ sub pickrandom {
 	my (undef,$id)=split(/\./,$rid);
         if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
 	my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
-	&Math::Random::random_set_seed_from_phrase($rndseed);
+	&Apache::lonnet::setup_random_from_rndseed($rndseed);
 	my @whichids=&Math::Random::random_permuted_index($#currentrids+1);
         for (my $i=1;$i<=$rndpick;$i++) { $currentrids[$whichids[$i]]=''; }
 	#&Apache::lonnet::logthis("$id,$rndseed,".join(':',@whichids));
@@ -493,8 +526,9 @@ sub readmap {
     %parmhash=();
     $errtext='';
     $pc=0;
+    &processversionfile(%cenv);
     my $furi=&Apache::lonnet::clutter($uri);
-    $hash{'src_0.0'}=$furi;
+    $hash{'src_0.0'}=&versiontrack($furi);
     $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
     $hash{'ids_'.$furi}='0.0';
     $hash{'is_map_0.0'}=1;
@@ -504,10 +538,12 @@ sub readmap {
         &accinit($uri,$short,$fn);
         &pickrandom();
     }
-# ------------------------------------------------------------ Version tracking
-#    if (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
-#	&Apache::lonnet::logthis('Will be version tracking');
-#    }
+# ------------------------------------------------------- Put versions into src
+    foreach (keys %hash) {
+	if ($_=~/^src\_/) {
+	    $hash{$_}=&putinversion($hash{$_});
+	}
+    }
     unless ((untie(%hash)) && (untie(%parmhash))) {
       &Apache::lonnet::logthis("<font color=blue>WARNING: ".
                        "Could not untie coursemap $fn for $uri.</font>");