--- rat/lonuserstate.pm	2002/07/07 17:52:20	1.33
+++ 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 1.33 2002/07/07 17:52:20 www Exp $
+# $Id: lonuserstate.pm,v 1.69 2003/12/15 15:26:26 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,23 +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
-# 12/16 Scott Harrison
-#
 ###
 
 package Apache::lonuserstate;
@@ -68,6 +51,50 @@ my @cond;    # Array with all of the con
 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
+
+# ----------------------------------- 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
 
 sub loadmap { 
@@ -79,7 +106,10 @@ sub loadmap {
     $hash{'map_pc_'.$uri}=$lpc;
     $hash{'map_id_'.$lpc}=$uri;
 
-    my $fn='/home/httpd/html'.$uri;
+# Determine and check filename
+    my $fn=&Apache::lonnet::filelocation('',&putinversion($uri));
+
+    my $ispage=($fn=~/\.page$/);
 
     unless (($fn=~/\.sequence$/) ||
             ($fn=~/\.page$/)) { 
@@ -87,32 +117,12 @@ sub loadmap {
        return OK; 
     }
 
-    my $ispage=($fn=~/\.page$/);
+    my $instr=&Apache::lonnet::getfile($fn);
 
-    unless (-e $fn) {
-	my $returned=Apache::lonnet::repcopy($fn);
-        unless ($returned eq OK) {
-           $errtext.="Could not import: $fn - ";
-           if ($returned eq HTTP_SERVICE_UNAVAILABLE) {
-	      $errtext.="Server unavailable\n";
-           }
-           if ($returned eq HTTP_NOT_FOUND) {
-	      $errtext.="File not found\n";
-           }
-           if ($returned eq FORBIDDEN) {
-	      $errtext.="Access forbidden\n";
-           }
-           return OK;
-       }
-    }
+    unless ($instr eq -1) {
+
+# Successfully got file, parse it
 
-    if (-e $fn) {
-        my @content;
-        {
-	    my $fh=Apache::File->new($fn);
-            @content=<$fh>;
-        }
-        my $instr=join('',@content);
         my $parser = HTML::TokeParser->new(\$instr);
         my $token;
 
@@ -131,26 +141,50 @@ sub loadmap {
 
                     $hash{'kind_'.$rid}='res';
                     $hash{'title_'.$rid}=$token->[2]->{'title'};
-                    my $turi=$token->[2]->{'src'};
+                    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($1);
-                        if ($token->[2]->{'external'} eq 'true') {
+                        if ($token->[2]->{'external'} eq 'true') { # external
                             $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//;
-                        } else {
-                           my $embstyle=&Apache::loncommon::fileembstyle($1);
-                           if (($embstyle eq 'img') || ($embstyle eq 'emb')) {
-			       $turi='/adm/wrapper'.$turi;
-                           }
+                        } elsif ($turi=~/^\/*uploaded\//) { # uploaded
+			    if (($embstyle eq 'img') || ($embstyle eq 'emb')
+                             || ($embstyle eq 'ssi')) {
+                                $turi='/adm/wrapper'.$turi;
+                            } elsif ($turi!~/\.(sequence|page)$/) {
+				$turi='/adm/coursedocs/showdoc'.$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;
+			    }
                         }
 		    }
-                    $hash{'src_'.$rid}=$turi;
 
                     if (defined($hash{'ids_'.$turi})) {
                         $hash{'ids_'.$turi}.=','.$rid;
                     } else {
                         $hash{'ids_'.$turi}=''.$rid;
                     }
+               
+                    if
+	        ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) {
+			$turi.='?register=1';
+		    }
+
+                    $hash{'src_'.$rid}=$turi;
 
                     if ($token->[2]->{'external'} eq 'true') {
                         $hash{'ext_'.$rid}='true:';
@@ -221,12 +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}.='&'.$newparam;
@@ -239,6 +278,9 @@ sub loadmap {
                     if ($token->[2]->{'name'} eq 'parameter_randompick') {
 			$randompick{$referid}=$token->[2]->{'value'};
                     }
+                    if ($token->[2]->{'name'} eq 'parameter_randompickseed') {
+			$randompick{$referid}=$token->[2]->{'value'};
+                    }
                 } 
 
             }
@@ -277,9 +319,11 @@ sub traceroute {
     $sofar=simplify($sofar);
     unless ($beenhere=~/\&$rid\&/) {
        $beenhere.=$rid.'&';  
-       if ($retfurl eq '') {
+       if (($retfurl eq '') && ($hash{'src_'.$rid})
+        && ($hash{'src_'.$rid}!~/\.sequence$/)) {
            my ($mapid,$resid)=split(/\./,$rid);
-           $retfurl=$hash{'src_'.$rid}.'?symb='.
+           $retfurl=$hash{'src_'.$rid}.
+           (($hash{'src_'.$rid}=~/\?/)?'&':'?').'symb='.
            &Apache::lonnet::symbclean(
                            &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
                            '___'.$resid.'___'.
@@ -366,11 +410,11 @@ sub accinit {
 	    my $resid=$_;
             my $uri=$hash{'src_'.$resid};
             $uri=~s/^\/adm\/wrapper//;
+            $uri=&Apache::lonnet::declutter($uri);
             my @uriparts=split(/\//,$uri);
             my $urifile=$uriparts[$#uriparts];
             $#uriparts--;
             my $uripath=join('/',@uriparts);
-            $uripath=~s/^\/res\///;
            if ($uripath) {
             my $uricond='0';
             if (defined($hash{'conditions_'.$resid})) {
@@ -378,7 +422,7 @@ sub accinit {
             }
             if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) {
                 if ($acchash{'acc.res.'.$short.'.'.$uripath}=~
-                   /(\&$urifile\:[^\&]*)/) {
+                   /(\&\Q$urifile\E\:[^\&]*)/) {
 		    my $replace=$1;
                     my $regexp=$replace;
                     $regexp=~s/\|/\\\|/g;
@@ -415,23 +459,27 @@ sub pickrandom {
         my $mpc=$hash{'map_pc_'.$hash{'src_'.$rid}};
 # ------------------------------------------- put existing resources into array
         my @currentrids=();
-        foreach (keys %hash) {
+        foreach (sort(keys(%hash))) {
 	    if ($_=~/^src_($mpc\.\d+)/) {
 		if ($hash{'src_'.$1}) { push @currentrids, $1; }
             }
         }
+	# rids are number.number and we want to numercially sort on 
+        # the second number
+	@currentrids=sort {
+	    my (undef,$aid)=split(/\./,$a);
+	    my (undef,$bid)=split(/\./,$b);
+	    $aid <=> $bid;
+	} @currentrids;
         next if ($#currentrids<$rndpick);
 # -------------------------------- randomly eliminate the ones that should stay
-	srand(&Apache::lonnet::rndseed($rid)); # use rid instead of symb
-        for (my $i=1;$i<=$rndpick;$i++) {
-            while (1) {
-		my $randomidx=int(rand($#currentrids+1));
-                if ($currentrids[$randomidx]) {
-		    $currentrids[$randomidx]='';
-                    last;
-                }
-            }
-        }
+	my (undef,$id)=split(/\./,$rid);
+        if ($randompickseed{$rid}) { $id=$randompickseed{$rid}; }
+	my $rndseed=&Apache::lonnet::rndseed($id); # use id instead of symb
+	&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));
 # -------------------------------------------------------- delete the leftovers
         for (my $k=0; $k<=$#currentrids; $k++) {
             if ($currentrids[$k]) {
@@ -472,14 +520,15 @@ sub readmap {
    unlink($fn.'parms.db');
    undef %randompick;
    $retfurl='';
-   if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) &&
-       (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT,0640))) {
+   if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
+       (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
     %hash=();
     %parmhash=();
     $errtext='';
     $pc=0;
-    my $furi='/res/'.&Apache::lonnet::declutter($uri);
-    $hash{'src_0.0'}=$furi;
+    &processversionfile(%cenv);
+    my $furi=&Apache::lonnet::clutter($uri);
+    $hash{'src_0.0'}=&versiontrack($furi);
     $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title');
     $hash{'ids_'.$furi}='0.0';
     $hash{'is_map_0.0'}=1;
@@ -489,6 +538,12 @@ sub readmap {
         &accinit($uri,$short,$fn);
         &pickrandom();
     }
+# ------------------------------------------------------- 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>"); 
@@ -507,6 +562,15 @@ sub readmap {
                        "Could not tie coursemap $fn for $uri.</font>"); 
    }
    &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext);
+# ------------------------------------------------- Check for critical messages
+
+    my @what=&Apache::lonnet::dump('critical',$ENV{'user.domain'},
+                                              $ENV{'user.name'});
+    if ($what[0]) {
+	if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
+	    $retfurl='/adm/email?critical=display';
+        }
+    }
    return ($retfurl,$errtext);
 }