--- rat/lonsequence.pm	2007/01/16 21:19:11	1.30
+++ rat/lonsequence.pm	2012/12/19 05:21:13	1.43
@@ -2,7 +2,7 @@
 #
 # Sequence Handler
 #
-# $Id: lonsequence.pm,v 1.30 2007/01/16 21:19:11 albertel Exp $
+# $Id: lonsequence.pm,v 1.43 2012/12/19 05:21:13 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -27,6 +27,8 @@
 # http://www.lon-capa.org/
 #
 
+
+
 package Apache::lonsequence;
 
 use strict;
@@ -34,8 +36,10 @@ use Apache::lonnet;
 use Apache::Constants qw(:common :http REDIRECT);
 use GDBM_File;
 use LONCAPA::map();
+use LONCAPA;
 use Apache::lonpageflip();
 use Apache::loncommon();
+use Apache::groupsort();
 use Apache::lonlocal;
 use HTML::Entities();
 
@@ -45,10 +49,10 @@ my $successtied;
 # ----------------------------------------- Attempt to read from resource space
 
 sub attemptread {
-    my $fn=shift;
+    my ($fn,$unsorted)=@_;
     &Apache::lonnet::repcopy($fn);
     if (-e $fn) {
-	return &LONCAPA::map::attemptread($fn);
+	return &LONCAPA::map::attemptread($fn,$unsorted);
     } else {
         return ();
     }
@@ -99,14 +103,15 @@ ENDSCRIPT
 	      '<h1>'.$url.'</h1>');
 # ------------------ This is trying to select. Provide buttons and tie %selhash
     if ($env{'form.forceselect'}) { $r->print(<<ENDSELECT);
-<form name=fileattr><input type=hidden name=acts value=''>
-<input type="button" name="close" value='CLOSE' onClick="self.close()">
-<input type="button" name="groupimport" value='GROUP IMPORT'
-onClick="javascript:select_group()">
+<form name="fileattr"><input type="hidden" name="acts" value="" />
+<input type="button" name="close" value="CLOSE" onClick="self.close()" />
+<input type="button" name="groupimport" value="GROUP IMPORT"
+onClick="javascript:select_group()" />
 </form>   
 ENDSELECT
     my $diropendb = 
-    "/home/httpd/perl/tmp/$env{'user.domain'}\_$env{'user.name'}_sel_res.db";
+  LONCAPA::tempdir() .
+    "$env{'user.domain'}\_$env{'user.name'}_sel_res.db";
         if (tie(%selhash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
 	    if ($env{'form.launch'} eq '1') {
 	       &start_fresh_session();
@@ -114,53 +119,18 @@ ENDSELECT
             $successtied=1;
 
 # - Evaluate actions from previous page (both cumulatively and chronologically)
-        if ($env{'form.catalogmode'} eq 'import') {
-	    my $acts=$env{'form.acts'};
-	    my @Acts=split(/b/,$acts);
-	    my %ahash;
-	    my %achash;
-	    my $ac=0;
-	    # some initial hashes for working with data
-	    foreach (@Acts) {
-		my ($state,$ref)=split(/a/);
-		$ahash{$ref}=$state;
-		$achash{$ref}=$ac;
-		$ac++;
-	    }
-	    # sorting through the actions and changing the tied database hash
-	    foreach (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) {
-		my $key=$_;
-		if ($ahash{$key} eq '1') {
-		    $selhash{'store_'.$selhash{'pre_'.$key.'_link'}}=
-			$selhash{'pre_'.$key.'_title'};
-		    $selhash{'storectr_'.$selhash{'pre_'.$key.'_link'}}=
-			$selhash{'storectr'}+0;
-		    $selhash{'storectr'}++;
-		}
-		if ($ahash{$key} eq '0') {
-		    if ($selhash{'store_'.$selhash{'pre_'.$key.'_link'}}) {
-		       delete $selhash{'store_'.$selhash{'pre_'.$key.'_link'}};
-		    }
-		}
-	    }
-	    # deleting the previously cached listing
-	    foreach (keys %selhash) {
-		if ($_ =~ /^pre_/ && $_ =~/link$/) {
-		    my $key = $_;
-		    $key =~ s/^pre_//;
-		    $key =~ s/_[^_]*$//;
-		    delete $selhash{'pre_'.$key.'_title'};
-		    delete $selhash{'pre_'.$key.'_link'};
-		}
+	    if ($env{'form.catalogmode'} eq 'import') {
+		&Apache::groupsort::update_actions_hash(\%selhash);
 	    }
-	}
 # -
         }
     }
 # ----------------------------- successtied is now '1' if in working selectmode
     my ($errtext,$fatal)=&mapread(&Apache::lonnet::filelocation('',$url),'');
     if ($fatal==1) {
-       $r->print('<p><b><font color="red">'.&mt('Map contents are not shown in order.').'</font></b></p><br />');
+       $r->print('<p class="LC_warning">'
+                .&mt('Map contents are not shown in order.')
+                .'</p><br />');
     }
     my $idx=0;
     foreach (&attemptread(&Apache::lonnet::filelocation('',$url))) {
@@ -183,7 +153,7 @@ ENDSELECT
 		if ($successtied) {
 		    my $checked='';
 	           if ($selhash{'store_'.$url}) {
-	       	      $checked=" checked";
+	       	      $checked=' checked="checked"';
 	           }
 	           $selhash{"pre_${idx}_link"}=$url;
 	           $selhash{"pre_${idx}_title"}=$title;
@@ -202,7 +172,7 @@ ENDCHECKBOX
             if ($successtied) {
 		$r->print('</form>');
             } else {
-		$r->print('<br>');
+		$r->print('<br />');
             }
         }
     }
@@ -249,6 +219,7 @@ sub handler {
   my $dismapid='';
   my $exitdisid = '';
   my $arrow_dir = '';
+  my $is_encrypted = '';
 
   if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
        my $last;
@@ -279,6 +250,9 @@ sub handler {
 	       if (!$env{'request.role.adv'}) {
 		   $randomout = $bighash{'randomout_'.$disid};
 	       }
+               if (!$env{'request.role.adv'}) {
+                   $is_encrypted = $bighash{'encrypted_'.$disid};
+               }
            } elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                     &GDBM_READER(),0640)) {
                $last=$hash{'last_known'};
@@ -298,6 +272,9 @@ sub handler {
 		   if (!$env{'request.role.adv'}) {
 		       $randomout = $bighash{'randomout_'.$disid};
 		   }
+                   if (!$env{'request.role.adv'}) {
+                       $is_encrypted = $bighash{'encrypted_'.$disid};
+                   }
                }
  	   }
            $exitdisid = $disid;
@@ -311,29 +288,35 @@ sub handler {
 # now either disurl is set (going to first page), or we need another display
    if ($disurl) {
 # -------------------------------------------------- Has first or last resource
+      my $showdisurl = $disurl;
+      if ($is_encrypted) {
+          $showdisurl = &Apache::lonenc::encrypted($disurl);
+      }
       &Apache::lonnet::symblist($requrl,$disurl => [$disurl,$dismapid],
 				'last_known' => [$disurl,$dismapid]); 
       &Apache::loncommon::content_type($r,'text/html');
-      $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl);
+      $r->header_out(Location => &Apache::lonnet::absolute_url($ENV{'SERVER_NAME'}).
+                                 $showdisurl);
       return REDIRECT;
    } else {
        &Apache::loncommon::content_type($r,'text/html');
        $r->send_http_header;
        if ($exitdisid eq '' && $arrow_dir ne '') {
            my %lt =&Apache::lonlocal::texthash(
-                   'back' => 'beginning',
-                   'forward' => 'end',
                    'nere' => 'Next resource could not be displayed',
                    'goba' => 'Go Back',
                    'nacc' => 'Navigate Course Content',
                           );
-           my $warnmsg = &mt('As all folders and sequences ');
+           my $warnmsg;
            if ($arrow_dir eq 'forward') {
-               $warnmsg .= &mt('following the current resource were empty').',';
+               $warnmsg = &mt('As all folders and sequences '
+                             .'following the current resource were empty, '
+                             .'you have now reached the end of the course.');
            } elsif ($arrow_dir eq 'back') {
-               $warnmsg .= &mt('preceding the current resource were empty').',';
+               $warnmsg = &mt('As all folders and sequences '
+                             .'preceding the current resource were empty, '
+                             .'you have now reached the beginning of the course.');
            }
-           $warnmsg .= &mt('you have now reached the').' '.$lt{$arrow_dir}.' '.&mt('of the course.');
            my $start_page=
 	       &Apache::loncommon::start_page('Empty Folder/Sequence');
            my $end_page=
@@ -358,7 +341,35 @@ ENDNONE
 1;
 __END__
 
+=head1 NAME
+
+Apache::lonsequence
+
+=head1 SYNOPSIS
+
+Handler for showing sequence objects of
+educational resources.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 SUBROUTINES
+
+=over
+
+=item handler()
+
+=item viewmap()
+
+=item attemptread()
+
+=item mapread()
+
+=item start_fresh_session()
+
+=back
 
+=cut