--- loncom/lonnet/perl/lonnet.pm	2002/10/01 07:09:05	1.287
+++ loncom/lonnet/perl/lonnet.pm	2002/10/07 13:50:36	1.292
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.287 2002/10/01 07:09:05 albertel Exp $
+# $Id: lonnet.pm,v 1.292 2002/10/07 13:50:36 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -644,6 +644,30 @@ sub chatsend {
 		   &escape($newentry)),$chome);
 }
 
+# ------------------------------------------ Find current version of a resource
+
+sub getversion {
+    my $fname=&clutter(shift);
+    unless ($fname=~/^\/res\//) { return -1; }
+    return &currentversion(&filelocation('',$fname));
+}
+
+sub currentversion {
+    my $fname=shift;
+    my $author=$fname;
+    $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+    my ($udom,$uname)=split(/\//,$author);
+    my $home=homeserver($uname,$udom);
+    if ($home eq 'no_host') { 
+        return -1; 
+    }
+    my $answer=reply("currentversion:$fname",$home);
+    if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
+	return -1;
+    }
+    return $answer;
+}
+
 # ----------------------------- Subscribe to a resource, return URL if possible
 
 sub subscribe {
@@ -652,7 +676,7 @@ sub subscribe {
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
     my ($udom,$uname)=split(/\//,$author);
     my $home=homeserver($uname,$udom);
-    if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) { 
+    if ($home eq 'no_host') { 
         return 'not_found'; 
     }
     my $answer=reply("sub:$fname",$home);
@@ -683,6 +707,11 @@ sub repcopy {
     } elsif ($remoteurl eq 'directory') {
            return OK;
     } else {
+        my $author=$filename;
+        $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+        my ($udom,$uname)=split(/\//,$author);
+        my $home=homeserver($uname,$udom);
+        unless ($home eq $perlvar{'lonHostID'}) {
            my @parts=split(/\//,$filename);
            my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
            if ($path ne "$perlvar{'lonDocRoot'}/res") {
@@ -718,6 +747,7 @@ sub repcopy {
                rename($transname,$filename);
                return OK;
            }
+       }
     }
 }
 
@@ -1986,14 +2016,15 @@ sub is_on_map {
     my @uriparts=split(/\//,$uri);
     my $filename=$uriparts[$#uriparts];
     my $pathname=$uri;
-    $pathname=~s/\/$filename$//;
+    $pathname=~s|/\Q$filename\E$||;
+    #Trying to find the conditional for the file
     my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
-	       /\&$filename\:([\d\|]+)\&/);
+	       /\&\Q$filename\E\:([\d\|]+)\&/);
     if ($match) {
-       return (1,$1);
-   } else {
-       return (0,0);
-   }
+	return (1,$1);
+    } else {
+	return (0,0);
+    }
 }
 
 # ----------------------------------------------------------------- Define Role
@@ -2592,7 +2623,7 @@ sub courseresdata {
 	    return $courseresdatacache{$hashid}->{$item};
 	}
     }
-    return '';
+    return undef;
 }
 
 # --------------------------------------------------------- Value of a Variable
@@ -2763,9 +2794,9 @@ sub EXT {
 	    $filename=$ENV{'request.filename'};
 	}
 	my $metadata=&metadata($filename,$spacequalifierrest);
-	if ($metadata) { return $metadata; }
+	if (defined($metadata)) { return $metadata; }
 	$metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
-	if ($metadata) { return $metadata; }
+	if (defined($metadata)) { return $metadata; }
 
 # ------------------------------------------------------------------ Cascade up
 	unless ($space eq '0') {
@@ -2773,11 +2804,11 @@ sub EXT {
 	    if ($id) {
 		my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
 				     $symbparm,$udom,$uname);
-		if ($partgeneral) { return $partgeneral; }
+		if (defined($partgeneral)) { return $partgeneral; }
 	    } else {
 		my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
 					 $symbparm,$udom,$uname);
-		if ($resourcegeneral) { return $resourcegeneral; }
+		if (defined($resourcegeneral)) { return $resourcegeneral; }
 	    }
 	}
 
@@ -2806,6 +2837,11 @@ sub metadata {
     my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
 
     $uri=&declutter($uri);
+    # if it is a non metadata possible uri return quickly
+    if (($uri eq '') || ($uri =~ m|^/*adm/|) || ($uri =~ m|/$|) ||
+	($uri =~ m|/.meta$|)) {
+	return '';
+    }
     my $filename=$uri;
     $uri=~s/\.meta$//;
 #