--- loncom/lonnet/perl/lonnet.pm	2004/11/02 22:13:13	1.557
+++ loncom/lonnet/perl/lonnet.pm	2004/11/08 18:04:17	1.563
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.557 2004/11/02 22:13:13 albertel Exp $
+# $Id: lonnet.pm,v 1.563 2004/11/08 18:04:17 banghart Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2469,7 +2469,6 @@ sub rolesinit {
         my $author=0;
         foreach (keys %allroles) {
             %thesepriv=();
-            if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
             if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
             foreach (split(/:/,$allroles{$_})) {
                 if ($_ ne '') {
@@ -2481,6 +2480,7 @@ sub rolesinit {
 			    $thesepriv{$privilege}.=$restrictions;
                         }
                     }
+		    if ($thesepriv{'adv'} eq 'F') { $adv=1; }
                 }
             }
             $thesestr='';
@@ -3781,6 +3781,72 @@ sub diskusage {
     return $listing;
 }
 
+# ------------------------------------------------------------- Mark as Read Only
+
+sub mark_as_readonly {
+    my ($domain,$user,$files,$what) = @_;
+    my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
+    foreach my $file (@{$files}) {
+        push(@{$current_permissions{$file}},$what);
+    }
+    &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
+    return;
+}
+
+#--------------------------------------------------------------Get Marked as Read Only
+
+sub get_marked_as_readonly {
+    my ($domain,$user,$what) = @_;
+    my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
+    my @readonly_files;
+    while (my ($file_name,$value) = each(%current_permissions)) {
+        &logthis("found $file_name");
+        if (ref($value) eq "ARRAY"){
+            &logthis("found array");
+            foreach my $stored_what (@{$value}) {
+                if ($stored_what eq $what) {
+                    push(@readonly_files, $file_name);
+                    &logthis("defined pushed $file_name");
+                } elsif (!defined($what)) {
+                    push(@readonly_files, $file_name);
+                    &logthis("undef pushed $file_name");
+                }
+            }
+        } 
+    }
+    return @readonly_files;
+}
+
+# ------------------------------------------------------------ Unmark as Read Only
+
+sub unmark_as_readonly {
+    # unmarks all files locked by $what 
+    # for portfolio submissions, $what contains $crsid and $symb
+    my ($domain,$user,$what) = @_;
+    my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
+    my @readonly_files = &Apache::lonnet::get_marked_as_readonly($domain,$user,$what);
+    foreach my $file(@readonly_files){
+        my $current_locks = $current_permissions{$file};
+        my @new_locks;
+        my @del_keys;
+        if (ref($current_locks) eq "ARRAY"){
+            foreach my $locker (@{$current_locks}) {
+                unless ($locker eq $what) {
+                    push(@new_locks, $what);
+                }
+            }
+            if (@new_locks > 0) {
+                $current_permissions{$file} = \@new_locks;
+            } else {
+                push(@del_keys, $file);
+                &Apache::lonnet::del('file_permissions',\@del_keys, $domain, $user);
+                delete $current_permissions{$file};
+            }
+        }
+    }
+    &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
+    return;
+}
 
 # ------------------------------------------------------------ Directory lister
 
@@ -4823,10 +4889,16 @@ sub get_rand_alg {
     return &latest_rnd_algorithm_id();
 }
 
+sub validCODE {
+    my ($CODE)=@_;
+    if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
+    return 0;
+}
+
 sub getCODE {
-    if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
+    if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
     if (defined($Apache::lonhomework::parsing_a_problem) &&
-	defined($Apache::lonhomework::history{'resource.CODE'})) {
+	&validCODE($Apache::lonhomework::history{'resource.CODE'})) {
 	return $Apache::lonhomework::history{'resource.CODE'};
     }
     return undef;