--- loncom/interface/lonindexer.pm	2010/08/13 13:32:36	1.208
+++ loncom/interface/lonindexer.pm	2025/03/18 19:36:59	1.232
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Directory Indexer
 #
-# $Id: lonindexer.pm,v 1.208 2010/08/13 13:32:36 wenzelju Exp $
+# $Id: lonindexer.pm,v 1.232 2025/03/18 19:36:59 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,9 +34,8 @@
 ## 1. Description of functions                                               ##
 ## 2. Modules used by this module                                            ##
 ## 3. Choices for different output views (detailed, summary, xml, etc)       ##
-## 4. BEGIN block (to be run once after compilation)                         ##
-## 5. Handling routine called via Apache and mod_perl                        ##
-## 6. Other subroutines                                                      ##
+## 4. Handling routine called via Apache and mod_perl                        ##
+## 5. Other subroutines                                                      ##
 ##                                                                           ##
 ###############################################################################
 
@@ -60,7 +59,6 @@ use LONCAPA qw(:match);
 # ---------------------------------------- variables used throughout the module
 my %hash; # global user-specific gdbm file
 my %dirs; # keys are directories, values are the open/close status
-my %language; # has the reference information present in language.tab
 my %dynhash; # hash of hashes for dynamic metadata
 my %dynread; # hash of directories already read for dynamic metadata
 my %fieldnames; # Metadata fieldnames
@@ -94,15 +92,9 @@ sub handler {
     undef (@Omit);
     %fieldnames=&Apache::lonmeta::fieldnames();
 
-# ------------------------------------- read in machine configuration variables
+# --------------------------------------------------------------- get icon path
     my $iconpath= $r->dir_config('lonIconsURL') . "/";
-    my $domain  = $r->dir_config('lonDefDomain');
-    my $role    = $r->dir_config('lonRole');
-    my $loadlim = $r->dir_config('lonLoadLim');
-    my $servadm = $r->dir_config('lonAdmEMail');
-    my $sysadm  = $r->dir_config('lonSysEMail');
-    my $lonhost = $r->dir_config('lonHostID');
-    my $tabdir  = $r->dir_config('lonTabDir');
+    my $defdom = &Apache::lonnet::default_login_domain();
 
 #SB my $fileclr='#ffffe6';
     my $line;
@@ -120,8 +112,8 @@ sub handler {
     my $colspan=''; 
     
     $extrafield='';
-    my $diropendb = 
-	"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_sel_res.db";
+    my $diropendb = LONCAPA::tempdir() .
+	"$env{'user.domain'}_$env{'user.name'}_sel_res.db";
     %hash = ();
     {
 	my %dbfile;
@@ -165,6 +157,8 @@ sub handler {
 ENDSUBM
        $r->print(&Apache::loncommon::start_page(undef,$js,
 						{'only_body'   =>1,
+                                                 'add_modal' => 1,
+                                                 'add_wishlist' => 1,
 						 'add_entries' =>
 						     {'onload' => "load();"},}
 						).
@@ -390,6 +384,7 @@ function uncheckAll() {
         }
     }
 }
+
 function openWindow(url, wdwName, w, h, toolbar,scrollbar,locationbar) {
     var xpos = (screen.width-w)/2;
     xpos = (xpos < 0) ? '0' : xpos;
@@ -401,6 +396,7 @@ function openWindow(url, wdwName, w, h,
     var newWin = window.open(url, wdwName, options);
     newWin.focus();
 }
+
 function gothere(val) {
     window.location=val+'?acts='+document.forms.fileattr.acts.value$inhibit_menu;
 }
@@ -413,14 +409,14 @@ ENDHEADER
         if ($env{'form.catalogmode'}) {
             # "Popup mode"
             $r->print(&Apache::loncommon::start_page('Browse published resources',$js,
-                                                     {'only_body' => 1,
+                                                     {'only_body' => 1, 'add_wishlist'=>1, 'add_modal' =>1, 
                                                       'domain' => $headerdom,}));
         } else {
             # Only display page header and breadcrumbs in non-popup mode
             &Apache::lonhtmlcommon::clear_breadcrumbs();
             &Apache::lonhtmlcommon::add_breadcrumb({
                 'text'  => 'Browse published resources',
-                'href'  => '/res/fhwfdev/?launch=1',
+                'href'  => '/res/'.$headerdom.'/?launch=1',
             });
             $r->print(&Apache::loncommon::start_page('Browse published resources',$js,
                                                      {'domain' => $headerdom,})
@@ -570,7 +566,7 @@ END
 	    } else {
 		$r->print($reshome);
 	    }
-	    $r->print("'>".&mt('Home').'</a></span>');
+	    $r->print("'>".&mt('Home directory').'</a></span>');
 	}
 	$r->print('</form>');
 # ------------------------------------------------------ Remember where we were
@@ -588,7 +584,7 @@ END
         $r->print(&Apache::loncommon::start_data_table("LC_tableBrowseRes")
                  .&Apache::loncommon::start_data_table_header_row());
 	$r->print("<th $colspan>".&mt('Name')."</th>\n");
-	$r->print("<th></th>\n");
+	$r->print('<th><span class="LC_visually_hidden">'.&mt('Add to Stored Links')."</span></th>\n");
 	$r->print("<th>".&mt('Title')."</th>\n") 
 	    if ($hash{'display_attrs_0'} == 1);
 	$r->print('<th class="LC_right">'.&mt("Size")." (".&mt("bytes").") ".
@@ -628,7 +624,7 @@ END
     	
 
 # ----------------- read in what directories have previously been set to "open"
-	foreach (keys %hash) {
+	foreach (keys(%hash)) {
 	    if ($_ =~ /^diropen_status_/) {
 		my $key = $_;
 		$key =~ s/^diropen_status_//;
@@ -669,12 +665,12 @@ END
 	    pop @uri_com;
 	    my $upone = join('/',@uri_com);
 	    my @list = qw (0);
-	    &display_line ($r,'opened',$upone.'&viewOneUp',0,$upone,@list);
+	    &display_line ($r,$defdom,'opened',$upone.'&viewOneUp',0,$upone,@list);
 	    $indent = 1;
 	}
 
 # -------- recursively go through all the directories and output as appropriate
-	&scanDir ($r,$toplevel,$indent,\%hash);
+	&scanDir ($r,$toplevel,$indent,\%hash,$defdom);
 
 # -------------------------------------------------------------- end the tables
         $r->print(&Apache::loncommon::end_data_table());
@@ -702,7 +698,7 @@ END
 
 # ----------------------------------------------- recursive scan of a directory
 sub scanDir {
-    my ($r,$startdir,$indent,$hashref)=@_;
+    my ($r,$startdir,$indent,$hashref,$defdom)=@_;
     my $c = $r->connection();
     my ($compuri,$curdir);
     my $dirptr=16384;
@@ -714,7 +710,20 @@ sub scanDir {
         return if ($c->aborted());
 	#This is a kludge, sorry aboot this
 	my ($strip,$dom,undef,$testdir,undef,undef,undef,undef,undef,undef,undef,undef,undef,undef,$obs,undef)=split(/\&/,$line,16); 
-	next if($strip =~ /.*\.meta$/ | $obs eq '1');
+	next if (($strip =~ /\.meta$/) || ($obs));
+        if ($dom ne 'domain') {
+            my ($udom,$uname);
+            if ($dom eq 'user') {
+                ($udom) = ($startdir =~ m{^/res/($match_domain)});
+                $uname = $strip;
+            } else {
+                ($udom,$uname) = ($startdir =~ m{^/res/($match_domain)/($match_courseid)});
+            }
+            if ($udom ne '' && $uname ne '') {
+                # Don't display "course author" directory.
+                next if (&Apache::lonnet::is_course($udom,$uname));
+            }
+        }
 	my (@fileparts) = split(/\./,$strip);
 	if ($hash{'display_attrs_9'} != 1) {
             # if not all versions to be shown
@@ -745,8 +754,8 @@ sub scanDir {
 		}
 	    }
 	}
-	&display_line($r,$diropen,$line,$indent,$curdir,$hashref,@list);
-	&scanDir ($r,$compuri,$indent) if $diropen eq 'opened';
+	&display_line($r,$defdom,$diropen,$line,$indent,$curdir,$hashref,@list);
+	&scanDir ($r,$compuri,$indent,undef,$defdom) if $diropen eq 'opened';
     }
     $indent--;
 }
@@ -755,9 +764,11 @@ sub scanDir {
 sub get_list {
     my ($r,$uri)=@_;
     my @list=();
+    my $listerror;
+    
     (my $luri = $uri) =~ s/\//_/g;
     if ($env{'form.updatedisplay'}) {
-	foreach (keys %hash) {
+	foreach (keys(%hash)) {
 	    delete $hash{$_} if ($_ =~ /^dirlist_files_/);
 	    delete $hash{$_} if ($_ =~ /^dirlist_timestamp_files_/);
 	}
@@ -778,10 +789,20 @@ sub get_list {
 	$hash{'dirlist_files_'.$luri} = join("\n",@list);
     } else {
 # is really a directory
-	@list = &Apache::lonnet::dirlist($uri);
+	(my $listref,$listerror) = &Apache::lonnet::dirlist($uri);
+        if (ref($listref) eq 'ARRAY') {
+            @list = @{$listref};
+        }
 	$hash{'dirlist_files_'.$luri} = join("\n",@list);
 	$hash{'dirlist_timestamp_files_'.$luri} = time;
     }
+#Checking for error messages associated with empty directories or inaccessible servers (See Bug 4984)
+    if (($listerror eq 'no_such_dir') || ($listerror eq 'no_such_host') || ($listerror eq 'no_host')) { 
+        $r->print("<p class='LC_info'>" . &mt("Directory does not exist."). "</p>");
+    } elsif ($listerror eq 'con_lost') {
+        $r->print("<p class='LC_info'>" . &mt("Directory temporarily not accessible."). "</p>");
+    }
+
     return @list=&match_ext($r,@list);    
 }
 
@@ -864,7 +885,7 @@ sub match_ext {
 
 # ------------------------------- displays one line in appropriate table format
 sub display_line {
-    my ($r,$diropen,$line,$indent,$startdir,$hashref,@list)=@_;
+    my ($r,$defdom,$diropen,$line,$indent,$startdir,$hashref,@list)=@_;
     my (@pathfn, $fndir);
 # there could be relative paths (files actually belonging into this directory)
 # or absolute paths (for example, from sequences)
@@ -930,6 +951,15 @@ sub display_line {
 # Do we have permission to look at this?
     if($filecom[15] ne '1') { return OK if ((!&Apache::lonnet::allowed('bre',$pathprefix.$filecom[0])) && (!&Apache::lonnet::allowed('bro',$pathprefix.$filecom[0]))); }
 
+    if (($filecom[1] eq 'domain') && ($defdom ne $listname)) {
+        unless (&Apache::lonnet::will_trust('shared',$listname,$defdom)) {
+            return OK;   
+        }
+        unless (&Apache::lonnet::will_trust('content',$defdom,$listname)) {
+            return OK;
+        }
+    }
+
 # make absolute links appear on different background
 #SB    if ($absolute) { $fileclr='#ccdd99'; }
 
@@ -964,7 +994,17 @@ $r->print ('<input type="hidden" name="a
 
 # display user directory
     }
+
     if ($filecom[1] eq 'user') {
+        my $domain=(split(m|/|,$startdir))[2];
+        if ($defdom ne $domain) {
+            unless (&Apache::lonnet::will_trust('shared',$domain,$defdom)) {
+                return OK;
+            }
+            unless (&Apache::lonnet::will_trust('content',$defdom,$domain)) {
+                return OK;
+            }
+        }
 	# $r->print("<tr valign=$valign bgcolor=\"$fileclr\">$extrafield");
 	my $curdir = $startdir.$filecom[0].'/';
 	my $anchor = $curdir;
@@ -982,6 +1022,9 @@ $r->print ('<input type="hidden" name="a
 	$r->print (' alt="'.$msg.'"/></a>'.
 		   "\n");
 	my $quotable_curdir = &Apache::loncommon::escape_single($curdir);
+        my $quotable_startdir = &Apache::loncommon::escape_single($startdir);
+        my $quotable_listname = &Apache::loncommon::escape_single($listname);
+
 	$r->print ('<a href="javascript:gothere(\''.$quotable_curdir
 		   .'\')"><img alt="'.$msg.'" src="'.
 		   $iconpath.'quill.gif" class="LC_fileicon" />');
@@ -992,10 +1035,10 @@ $r->print ('<input type="hidden" name="a
         if (defined($plainname) && $plainname) { $r->print(" ($plainname) "); }
 # Wishlistlink
         $r->print('</form></td><td><a href="javascript:;" '.
-                  'title="'.&mt('Set a link for this folder to wishlist').'" '.
-                  'onclick="set_wishlistlink('."'$plainname','$startdir$listname'".')">'.
+                  'title="'.&mt('Save a link for this folder in your personal Stored Links repository').'" '.
+                  'onclick="set_wishlistlink('."'$plainname','$quotable_startdir$quotable_listname"."/'".')">'.
                   '<img class="LC_icon" src="/res/adm/pages/wishlist.png" '.
-                  'alt="'.&mt('set wishlistlink').'" style="width:22px;"/></a>'.$tabtag);
+                  'alt="'.&mt('save in Stored Links').'" style="width:22px;"/></a>'.$tabtag);
         $r->print(&Apache::loncommon::end_data_table_row());
         return OK;
     }
@@ -1076,26 +1119,29 @@ $r->print ('<input type="hidden" name="a
 # Filetype icons
 	$r->print("<img alt=\"\" src='$iconname' class='LC_fileicon' />\n");
 	my $quotable_filelink = &Apache::loncommon::escape_single($filelink);
+        my $quotable_startdir = Apache::loncommon::escape_single($startdir);
+        my $quotable_listname = &Apache::loncommon::escape_single($listname);
+        my $curfext = lc((split(/\./,$listname))[-1]);
+        my $modalstyle;
+        if ($curfext =~ /^js|css|txt|tab$/) {
+            $modalstyle = ",'','background-color:#ffffff'";
+        }
 
-	$r->print (" <a href=\"javascript:openWindow('".$quotable_filelink.
-		   "?inhibitmenu=yes','previewfile','450','500','no','yes','yes');\"".
-		   " target=\"_self\">$listname</a> ");
+	$r->print (" <a href=\"javascript:openMyModal('".$quotable_filelink."?inhibitmenu=yes',500,500,'yes'".$modalstyle.");\">$listname</a> ");
 	$quotable_filelink = &Apache::loncommon::escape_single($filelink.'.meta');
 	&Apache::loncommon::inhibit_menu_check(\$quotable_filelink);
-	$r->print (" (<a href=\"javascript:openWindow('".$quotable_filelink.
-		   "?inhibitmenu=yes','metadatafile','500','550','no','yes','no');\" ".
-		   " target=\"_self\">".&mt('metadata')."</a>) ");
+	$r->print (" (<a href=\"javascript:openMyModal('".$quotable_filelink."?inhibitmenu=yes',500,500,'yes');\">".&mt('metadata')."</a>) ");
 # Close form to open/close sequence
 	if ($filelink=~/\.(page|sequence)$/) {
 	    $r->print('</form>');
 	}
 	$r->print("</td>\n");
 # Wishlistlink
-        $r->print('<td><a href="javascript:;" title="'.&mt('Set a link for this resource to wishlist').'" '.
+        $r->print('<td><a href="javascript:;" title="'.&mt('Save a link for this resource in your personal Stored Links repository').'" '.
                   'onclick="set_wishlistlink('."'".&Apache::lonnet::gettitle($filelink).
-                  "','$startdir$listname'".')">'.
+                  "','$quotable_startdir$quotable_listname'".')">'.
                   '<img class="LC_icon" src="/res/adm/pages/wishlist.png" '.
-                  'alt="'.&mt('set wishlistlink').'" style="width:22px;"/></a></td>');
+                  'alt="'.&mt('save in Stored Links').'" style="width:22px;"/></a></td>');
 	if ($hash{'display_attrs_0'} == 1) {
 	    $r->print('<td> '.($title eq '' ? '&nbsp;' : $title).
 		      ' </td>'."\n");
@@ -1235,7 +1281,9 @@ $r->print ('<input type="hidden" name="a
 	$r->print (' alt="'.$msg.'" class="LC_fileicon" /></a>'.
 		   "\n");
 	my $quotable_curdir = &Apache::loncommon::escape_single($curdir);
-        
+        my $quotable_startdir = &Apache::loncommon::escape_single($startdir);
+        my $quotable_listname = &Apache::loncommon::escape_single($listname);
+
         my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons");
 	my $icon = "navmap.folder.".($nowOpen ? "open":"closed").'.gif';
         $r->print ('<a href="javascript:gothere('
@@ -1246,10 +1294,10 @@ $r->print ('<input type="hidden" name="a
 	$r->print ("$listname</a></form>");
 # Wishlistlink
         $r->print('</td><td><a href="javascript:;" '.
-                  'title="'.&mt('Set a link for this folder to wishlist').'" '.
-                  'onclick="set_wishlistlink('."'$listname','$startdir$listname'".')">'.
+                  'title="'.&mt('Save a link for this folder in Stored Links').'" '.
+                  'onclick="set_wishlistlink('."'$listname','$quotable_startdir$quotable_listname"."/'".')">'.
                   '<img class="LC_icon" src="/res/adm/pages/wishlist.png" '.
-                  'alt="'.&mt('set wishlistlink').'" style="width:22px;"/></a></td>');
+                  'alt="'.&mt('save in Stored Links').'" style="width:22px;"/></a></td>');
 # Attributes
 	my $filelink = $startdir.$filecom[0].'/default';
 
@@ -1294,8 +1342,8 @@ $r->print ('<input type="hidden" name="a
 	}
 	if ($hash{'display_attrs_7'} == 1) {
 	   $r->print('<td>&nbsp;</td>');
-    }     
-    if ($hash{'display_attrs_11'} == 1) {
+        }
+        if ($hash{'display_attrs_11'} == 1) {
 	   $r->print('<td>&nbsp;</td>');
 	}
 	if ($hash{'display_attrs_12'} == 1) {
@@ -1338,15 +1386,18 @@ sub coursecontext {
     my $filesymb=&Apache::lonnet::symbread($filelink);
     if ($filesymb) {
 	my ($map,$index,$resource)=&Apache::lonnet::decode_symb($filesymb);
-	$r->print(&mt('Already in this course:<br />[_1] in folder/map [_2].<br />',
-	      &Apache::lonnet::gettitle($resource),
-	      &Apache::lonnet::gettitle($map)));
+	$r->print(
+            &mt('Already in this course:').'<br />'
+           .&mt('[_1] in folder/map [_2]',
+                    &Apache::lonnet::gettitle($resource),
+                    &Apache::lonnet::gettitle($map))
+           .'<br />');
     }
 }
 
 sub showpreview {
     my ($filelink)=@_;
-    if ($filelink=~m-^(/ext/|http://)-) {
+    if ($filelink=~m-^(/ext/|https?://)-) {
 	return &mt('External Resource, preview not enabled');
     }
     my ($curfext)=($filelink=~/\.(\w+)$/);
@@ -1426,7 +1477,7 @@ sub start_fresh_session {
     delete $hash->{'form.element'};
     delete $hash->{'form.omit'};
     delete $hash->{'form.only'};
-    foreach (keys %{$hash}) {
+    foreach (keys(%{$hash})) {
         delete $hash->{$_} if (/^(pre_|store)/);
     }
 }
@@ -1477,18 +1528,6 @@ This module enables a scheme of browsing
 This is part of the LearningOnline Network with CAPA project
 described at http://www.lon-capa.org.
 
-=head1 BEGIN SUBROUTINE
-
-This routine is only run once after compilation.
-
-=over 4
-
-=item *
-
-Initializes %language hash table.
-
-=back
-
 =head1 HANDLER SUBROUTINE
 
 This routine is called by Apache and mod_perl.