--- rat/lonsequence.pm	2008/11/20 15:19:05	1.35
+++ rat/lonsequence.pm	2019/02/06 23:45:14	1.48.2.1
@@ -2,7 +2,7 @@
 #
 # Sequence Handler
 #
-# $Id: lonsequence.pm,v 1.35 2008/11/20 15:19:05 jms Exp $
+# $Id: lonsequence.pm,v 1.48.2.1 2019/02/06 23:45:14 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,10 +36,13 @@ 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 Apache::lonnavmaps();
+use Apache::lonenc();
 use HTML::Entities();
 
 my %selhash;
@@ -102,14 +105,15 @@ 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 ($env{'form.launch'} eq '1') {
 	       &start_fresh_session();
@@ -126,16 +130,18 @@ ENDSELECT
 # ----------------------------- successtied is now '1' if in working selectmode
     my ($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))) {
-	if (defined($_)) {
+    foreach my $entry (&attemptread(&Apache::lonnet::filelocation('',$url))) {
+	if (defined($entry)) {
             $idx++;
             if ($successtied) { 
 		$r->print('<form name="form'.$idx.'">');
             }
-	    my ($title,$url)=split(/\:/,$_);
+	    my ($title,$url)=split(/\:/,$entry);
 	    $title = &LONCAPA::map::qtescape($title);
 	    unless ($title) { $title=(split(/\//,$url))[-1] };
             my $enc_title = &HTML::Entities::encode($title,'\'"<>&');
@@ -149,7 +155,7 @@ ENDSELECT
 		if ($successtied) {
 		    my $checked='';
 	           if ($selhash{'store_'.$url}) {
-	       	      $checked=" checked";
+	       	      $checked=' checked="checked"';
 	           }
 	           $selhash{"pre_${idx}_link"}=$url;
 	           $selhash{"pre_${idx}_title"}=$title;
@@ -168,7 +174,7 @@ ENDCHECKBOX
             if ($successtied) {
 		$r->print('</form>');
             } else {
-		$r->print('<br>');
+		$r->print('<br />');
             }
         }
     }
@@ -180,12 +186,12 @@ ENDCHECKBOX
 
 # ----------------------------------------------------------- Clean out selhash
 sub start_fresh_session {
-    foreach (keys %selhash) {
-	if ($_ =~ /^pre_/) {
-	    delete $selhash{$_};
+    foreach my $item (keys(%selhash)) {
+	if ($item =~ /^pre_/) {
+	    delete $selhash{$item};
 	}
-	if ($_ =~ /^store/) {
-	    delete $selhash{$_};
+	if ($item =~ /^store/) {
+	    delete $selhash{$item};
 	}
     }
 }
@@ -201,13 +207,123 @@ sub handler {
       $r->send_http_header;
       return OK;
    }
- 
+
+   my $requrl=$r->uri;
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-                                          ['forceselect','launch']);
+                                          ['forceselect','launch','navmap']);
+
+   if (($env{'request.course.fn'}) && ($env{'form.navmap'}) && ($env{'request.course.id'})) {
+       my $crstype = &Apache::loncommon::course_type();
+       unless (($crstype eq 'Placement') && (!$env{'request.role.adv'})) {
+
+           # Check for critical messages and redirect if present.
+           my ($redirect,$url) = &Apache::loncommon::critical_redirect(300,'contents');
+           if ($redirect) {
+               &Apache::loncommon::content_type($r,'text/html');
+               $r->header_out(Location => $url);
+               return REDIRECT;
+           }
+
+           # Check if course needs to be re-initialized
+           my $loncaparev = $r->dir_config('lonVersion');
+           my ($result,@reinit) = &Apache::loncommon::needs_coursereinit($loncaparev);
+
+           if ($result eq 'switch') {
+               &Apache::loncommon::content_type($r,'text/html');
+               $r->send_http_header;
+               $r->print(&Apache::loncommon::check_release_result(@reinit));
+               return OK;
+           } elsif ($result eq 'update') {
+               my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+               my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+               my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum");
+               if ($ferr) {
+                   my $requrl = $r->uri;
+                   $env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
+                   $env{'user.reinit'} = 1;
+                   return HTTP_NOT_ACCEPTABLE;
+               }
+           }
+
+           &Apache::loncommon::content_type($r,'text/html');
+           $r->send_http_header;
+
+           my $mapurl = &Apache::lonnet::declutter($requrl);
+           my $maptitle = &Apache::lonnet::gettitle($mapurl);
+           my @crumbs = ({text => $maptitle, no_mt => 1});
+           my $args = {'bread_crumbs' => \@crumbs,
+                       'bread_crumbs_nomenu' => 1};
+
+           # Create the nav map
+           my $navmap = Apache::lonnavmaps::navmap->new();
+
+           if (ref($navmap)) {
+               # renderer call
+               if (&Apache::lonnet::is_on_map($requrl)) {
+                   @crumbs = ({text  => $crstype.' Contents',
+                               href  => "javascript:gopost('/adm/navmaps','')"});
+                   my $res = $navmap->getResourceByUrl($mapurl);
+                   if (ref($res)) {
+                       my $symb = $res->symb();
+                       if ($symb) {
+                           my ($parent) = &Apache::lonnet::decode_symb($res->symb());
+                           if ($parent ne $env{'course.'.$env{'request.course.id'}.'.url'}) {
+                               my @mapcrumbs = $navmap->recursed_crumbs($parent);
+                               if (@mapcrumbs) {
+                                   push(@crumbs,@mapcrumbs);
+                               }
+                           }
+                           $env{'request.symb'} = $symb;
+                       }
+                   }
+                   push(@crumbs,{text => $maptitle, no_mt => 1});
+                   $args = {'bread_crumbs' => \@crumbs,
+                            'bread_crumbs_nomenu' => 1};
+                   $r->print(&Apache::loncommon::start_page($maptitle,undef,$args));
+
+                   my $renderArgs = { 'cols'                    => [0,1,2,3],
+                                      'url'                     => $mapurl,
+                                      'navmap'                  => $navmap,
+                                      'suppressNavmap'          => 1,
+                                      'suppressEmptySequences'  => 1,
+                                      'filterFunc'              => undef,
+                                      'resource_no_folder_link' => 1,
+                                      'r'                       => $r,
+                                      'caller'                  => 'sequence',
+                                      'notools'                 => 1,
+                                      'iterator_map'            => $mapurl,
+                                    };
+
+                   my $render = &Apache::lonnavmaps::render($renderArgs);
+
+                   # If no resources were found let the user know.
+                   if ($renderArgs->{'counter'} == 0) {
+                       $r->print('<p class="LC_info">'.
+                                 &mt('No items found in folder').
+                                 '</p>');
+                   }
+                   $r->print(&Apache::loncommon::end_page());
+               } else {
+                   $r->print(&Apache::loncommon::start_page($maptitle,undef,$args).
+                             '<p class="LC_info">'.
+                             &mt('Folder no longer appears to be a part of the course').
+                             '</p>'.
+                             &Apache::loncommon::end_page());
+               }
+           } else {
+               $r->print(&Apache::loncommon::start_page($maptitle,undef,$args).
+                         '<p class="LC_warning">'.
+                         &mt('Error: could not determine contents of folder').
+                         '</p>'.
+                         &Apache::loncommon::end_page());
+           }
+           $r->rflush();
+           return OK;
+       }
+   }
 
    my %hash;
    my %bighash;
-   my $requrl=$r->uri;
 
    $successtied=0;
 # ------------------------------------------------------------ Tie symb db file
@@ -215,6 +331,7 @@ sub handler {
   my $dismapid='';
   my $exitdisid = '';
   my $arrow_dir = '';
+  my $is_encrypted = '';
 
   if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
        my $last;
@@ -245,6 +362,9 @@ sub handler {
 	       if (!$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'};
@@ -264,6 +384,9 @@ sub handler {
 		   if (!$env{'request.role.adv'}) {
 		       $randomout = $bighash{'randomout_'.$disid};
 		   }
+                   if (!$env{'request.role.adv'}) {
+                       $is_encrypted = $bighash{'encrypted_'.$disid};
+                   }
                }
  	   }
            $exitdisid = $disid;
@@ -277,29 +400,38 @@ sub handler {
 # now either disurl is set (going to first page), or we need another display
    if ($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',
+                   'nacc' => 'Course Contents',
                           );
-           my $warnmsg = &mt('As all folders and sequences ');
+           if (&Apache::loncommon::course_type() eq 'Community') {
+               $lt{'nav'} = &mt('Community Contents');
+           }
+           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=