--- loncom/Lond.pm	2015/05/22 21:14:59	1.8
+++ loncom/Lond.pm	2022/01/19 16:47:51	1.8.2.3
@@ -1,6 +1,6 @@
 # The LearningOnline Network
 #
-# $Id: Lond.pm,v 1.8 2015/05/22 21:14:59 raeburn Exp $
+# $Id: Lond.pm,v 1.8.2.3 2022/01/19 16:47:51 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -239,10 +239,10 @@ sub check_homecourses {
                     }
                 }
                 unless (&untie_domain_hash($hashref)) {
-                    &logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
+                    &Apache::lonnet::logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
                 }
             } else {
-                &logthis("Failed to tie hash for nohist_courseids.db for $domain");
+                &Apache::lonnet::logthis("Failed to tie hash for nohist_courseids.db for $domain");
             }
         }
         foreach my $hashid (keys(%recent)) {
@@ -314,9 +314,9 @@ sub get_courseinfo_hash {
     };
     if ($@) {
         if ($@ eq "timeout\n") {
-            &logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
+            &Apache::lonnet::logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
         } else {
-            &logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
+            &Apache::lonnet::logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
         }
     } else {
         if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
@@ -782,6 +782,53 @@ sub dump_profile_database {
     return $qresult;
 }
 
+sub is_course {
+    my ($cdom,$cnum) = @_;
+
+    return unless (($cdom =~ /^$LONCAPA::match_domain$/) &&
+                   ($cnum =~ /^$LONCAPA::match_courseid$/));
+    my $hashid = $cdom.':'.$cnum;
+    my ($iscourse,$cached) =
+        &Apache::lonnet::is_cached_new('iscourse',$hashid);
+    unless (defined($cached)) {
+        my $hashref =
+            &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
+        if (ref($hashref) eq 'HASH') {
+            my $esc_key = &escape($cdom.'_'.$cnum);
+            if (exists($hashref->{$esc_key})) {
+                $iscourse = 1;
+            } else {
+                $iscourse = 0;
+            }
+            &Apache::lonnet::do_cache_new('iscourse',$hashid,$iscourse,3600);
+            unless (&untie_domain_hash($hashref)) {
+                &Apache::lonnet::logthis("Failed to untie tied hash for nohist_courseids.db for $cdom");
+            }
+        } else {
+            &Apache::lonnet::logthis("Failed to tie hash for nohist_courseids.db for $cdom");
+        }
+    }
+    return $iscourse;
+}
+
+sub get_dom {
+    my ($userinput) = @_;
+    my ($cmd,$udom,$namespace,$what) =split(/:/,$userinput,4);
+    my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_READER()) or
+        return "error: ".($!+0)." tie(GDBM) Failed while attempting $cmd";
+    my $qresult='';
+    if (ref($hashref)) {
+        chomp($what);
+        my @queries=split(/\&/,$what);
+        for (my $i=0;$i<=$#queries;$i++) {
+            $qresult.="$hashref->{$queries[$i]}&";
+        }
+        $qresult=~s/\&$//;
+    }
+    &untie_user_hash($hashref) or
+        return "error: ".($!+0)." untie(GDBM) Failed while attempting $cmd";
+    return $qresult;
+}
 
 1;
 
@@ -905,7 +952,18 @@ courseID -- for the course for which the
 The contents of the inner hash, for that single item in the outer hash
 are returned (and cached in memcache for 10 minutes).
 
+=item get_dom ( $userinput )
 
+get_dom() will retrieve domain configuration information from a GDBM file
+in /home/httpd/lonUsers/$dom on the primary library server in a domain.
+The single argument passed is the string: $cmd:$udom:$namespace:$what
+where $cmd is the command historically passed to lond - i.e., getdom
+or egetdom, $udom is the domain, $namespace is the name of the GDBM file
+(encconfig or configuration), and $what is a string containing names of
+items to retrieve from the db file (each item name is escaped and separated
+from the next item name with an ampersand). The return value is either:
+error: followed by an error message, or a string containing the value (escaped)
+for each item, again separated from the next item with an ampersand.
 
 =back