--- loncom/interface/lonsearchcat.pm	2002/06/26 18:19:41	1.131
+++ loncom/interface/lonsearchcat.pm	2002/06/27 19:28:50	1.133
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Search Catalog
 #
-# $Id: lonsearchcat.pm,v 1.131 2002/06/26 18:19:41 matthew Exp $
+# $Id: lonsearchcat.pm,v 1.133 2002/06/27 19:28:50 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -212,12 +212,10 @@ END
 onClick='javascript:select_group()'>
 END
     }
-    $hidden .= <<END;
-<input type='hidden' name='mode'    value='$ENV{'form.mode'}'>
-<input type='hidden' name='form'    value='$ENV{'form.form'}'>
-<input type='hidden' name='element' value='$ENV{'form.element'}'>
-<input type='hidden' name='date' value='2'>
-END
+    $hidden .= &make_persistent({ "form.mode"    => $ENV{'form.mode'},
+                                  "form.form"    => $ENV{'form.form'},
+                                  "form.element" => $ENV{'form.element'},
+                                  "form.date"    => 2 });
     ##
     ##  What are we doing?
     ##
@@ -389,12 +387,46 @@ ENDHEADER
 				$ENV{'form.owner'});
     $scrout.="</table>\n";
     $ENV{'form.category'}='any' unless length($ENV{'form.category'});
-    $scrout.=&selectbox('Limit by file category','category',
+    $scrout.=&selectbox('File Category','category',
 			$ENV{'form.category'},
 			'any','Any category',
 			undef,
 			(&Apache::loncommon::filecategories()));
     $ENV{'form.language'}='any' unless length($ENV{'form.language'});
+    #----------------------------------------------------------------
+    # Allow restriction to multiple domains.
+    #   I make the crazy assumption that there will never be a domain 'any'.
+    #
+    $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
+    my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} 
+                           :  ($ENV{'form.domains'}) );
+    my %domain_hash = ();
+    foreach (@allowed_domains) {
+        $domain_hash{$_}++;
+    }
+    my @domains =&Apache::loncommon::get_domains();
+    # adjust the size of the select box
+    my $size = 4;
+    my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
+    # standalone machines do not get to choose a domain to search.
+    if ((scalar @domains) == 1) {
+        $scrout .='<input type="hidden" name="domains" value="any" />'."\n";
+    } else {
+        $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
+            'DOMAINS</b></font><br />'.
+                '<select name="domains" size="'.$size.'" multiple>'."\n".
+                    '<option name="any" value="any" '.
+                        ($domain_hash{'any'}? 'selected ' :'').
+                        '>all domains</option>'."\n";
+        foreach my $dom (sort @domains) {
+            $scrout.="<option name=\"$dom\" ".
+                ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
+        }
+        $scrout.="</select>\n";
+    }
+    #----------------------------------------------------------------
+    # 
+    #
     $scrout.=&selectbox('Limit by language','language',
 			$ENV{'form.language'},'any','Any Language',
 			\&{Apache::loncommon::languagedescription},
@@ -493,16 +525,19 @@ to be somewhat persistent.
 ######################################################################
 
 sub make_persistent {
+    my %save = %{shift()};
     my $persistent='';
-    foreach (keys %ENV) {
+    foreach (keys %save) {
 	if (/^form\./ && !/submit/) {
 	    my $name=$_;
-	    my $key=$name;
-	    $ENV{$key}=~s/\'//g; # do not mess with html field syntax
+            my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
 	    $name=~s/^form\.//;
-	    $persistent.=<<END;
-<input type="hidden" name="$name" value="$ENV{$key}" />
+            foreach (@values) {
+                s/\"/\'/g; # do not mess with html field syntax
+                $persistent.=<<END;
+<input type="hidden" name="$name" value="$_" />
 END
+            }
         }
     }
     return $persistent;
@@ -786,6 +821,29 @@ sub advancedsearch {
 	my @fields=split(/\s+/,$customshow);
 	$customshow=join(" ",@fields);
     }
+    ## ---------------------------------------------------------------
+    ## Deal with restrictions to given domains
+    ## 
+    my $libraries_to_query = undef;
+    # $ENV{'form.domains'} can be either a scalar or an array reference.
+    # We need an array.
+    my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} 
+                           :  ($ENV{'form.domains'}) );
+    my %domain_hash = ();
+    foreach (@allowed_domains) {
+        $domain_hash{$_}++;
+    }
+    foreach (keys(%Apache::lonnet::libserv)) {
+        if ($_ eq 'any') {
+            $libraries_to_query = undef;
+            last;
+        }
+        if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
+            push @$libraries_to_query,$_;
+        }
+    }
+    ## ---------------------------------------------------------------
+    #
     # Send query statements over the network to be processed by either the SQL
     # database or a recursive scheme of 'grep'-like actions (for custom
     # metadata).
@@ -794,18 +852,21 @@ sub advancedsearch {
 	$query="select * from metadata where $query";
 	my $reply; # reply hash reference
 	unless ($customquery or $customshow) {
-	    $reply=&Apache::lonnet::metadata_query($query);
+            $reply=&Apache::lonnet::metadata_query($query,undef,undef,
+                                                   $libraries_to_query);
 	}
 	else {
 	    $reply=&Apache::lonnet::metadata_query($query,
-						   $customquery,$customshow);
+						   $customquery,$customshow,
+                                                   $libraries_to_query);
 	}
 	&output_results('Advanced',$r,$customquery,$reply,$hidden);
         return OK;
     } elsif ($customquery) {
 	my $reply; # reply hash reference
 	$reply=&Apache::lonnet::metadata_query('',
-					       $customquery,$customshow);
+					       $customquery,$customshow,
+                                               $libraries_to_query);
 	&output_results('Advanced',$r,$customquery,$reply,$hidden);
         return OK;
     }
@@ -1062,7 +1123,7 @@ sub output_results {
     my $viewselect=$ENV{'form.viewselect'};
     #
     # make query information persistent to allow for subsequent revision
-    my $persistent=&make_persistent();
+    my $persistent=&make_persistent(\%ENV);
     # spit out the results header
     $r->print(&search_results_header($mode));
     $r->rflush();
@@ -1804,7 +1865,7 @@ sub filled {
 sub output_blank_field_error {
     my ($r)=@_;
     # make query information persistent to allow for subsequent revision
-    my $persistent=&make_persistent();
+    my $persistent=&make_persistent(\%ENV);
 
     $r->print(<<BEGINNING);
 <html>
@@ -1850,7 +1911,7 @@ Output a full html page with an error me
 sub output_date_error {
     my ($r,$message)=@_;
     # make query information persistent to allow for subsequent revision
-    my $persistent=&make_persistent();
+    my $persistent=&make_persistent(\%ENV);
 
     $r->print(<<RESULTS);
 <html>