--- rat/lonpageflip.pm	2013/11/28 02:23:25	1.83
+++ rat/lonpageflip.pm	2021/07/19 14:26:40	1.105
@@ -2,7 +2,7 @@
 #
 # Page flip handler
 #
-# $Id: lonpageflip.pm,v 1.83 2013/11/28 02:23:25 raeburn Exp $
+# $Id: lonpageflip.pm,v 1.105 2021/07/19 14:26:40 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,6 +36,9 @@ use LONCAPA;
 use Apache::Constants qw(:common :http REDIRECT);
 use Apache::lonnet;
 use Apache::loncommon();
+use Apache::lonnavmaps();
+use Apache::lonuserstate;
+use Apache::lonlocal;
 use HTML::TokeParser;
 use GDBM_File;
 
@@ -81,17 +84,27 @@ sub hash_src {
     my ($mapid,$resid)=split(/\./,$id);
     my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},
 					  $resid,$hash{'src_'.$id});
+    my $anchor;
+    if ($hash{'ext_'.$id} eq 'true:') {
+        if ($hash{'src_'.$id} =~ /(\#.+)$/) {
+            $anchor = $1;
+        }
+    }
     if ($hash{'encrypted_'.$id}) {
 	return (&Apache::lonenc::encrypted($hash{'src_'.$id}),
-		&Apache::lonenc::encrypted($symb));
+		&Apache::lonenc::encrypted($symb),
+                $hash{'encrypted_'.$id},$anchor);
     }
-    return ($hash{'src_'.$id},$symb);
+    return ($hash{'src_'.$id},$symb,$hash{'encrypted_'.$id},$anchor);
 }
 
 sub move {
-    my ($next,$endupmap,$direction) = @_;
+    my ($next,$endupmap,$direction,$firstres) = @_;
     my $safecount=0;
     my $allowed=0;
+    my $deeplinkonly=0;
+    my $prev=$next;
+    my ($prevmapid)=split(/\./,$next);
     do {
 	($next,$endupmap)=&get_next_possible_move($next,$endupmap,$direction);
 
@@ -103,16 +116,37 @@ sub move {
 	    $allowed = 0;
 	} else {
 	    my $priv = &Apache::lonnet::allowed('bre',$url,$symb);
-	    $allowed = (($priv eq 'F') || ($priv eq '2'));
+	    $allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A'));
 	}
+        $deeplinkonly = 0;
+        if ($hash{'deeplinkonly_'.$next}) {
+            my ($value,$level) = split(/:/,$hash{'deeplinkonly_'.$next});
+            if ($level eq 'resource') {
+                $deeplinkonly = 1;
+            } elsif ($level eq 'map') {
+                if ($mapid != $prevmapid) {
+                    $deeplinkonly = 1;
+                }
+            }
+        } elsif (($hash{'deeplinkonly_'.$prev}) && (!$firstres)) {
+            my ($value,$level) = split(/:/,$hash{'deeplinkonly_'.$prev});
+            if ($level eq 'resource') {
+                $deeplinkonly = 1;
+            } elsif ($level eq 'map') {
+                if ($mapid != $prevmapid) {
+                    $deeplinkonly = 1;
+                }
+            }
+        }
 	$safecount++;
     } while (   ($next)
 	     && ($next!~/\,/)
 	     && (
 		    (!$hash{'src_'.$next})
 		 || (
-		        (!$env{'request.role.adv'})
-		     &&  $hash{'randomout_'.$next}
+                        (!$env{'request.role.adv'})
+                     && (($hash{'randomout_'.$next})
+                     ||  ($deeplinkonly))
 		    )
 		 || (!$allowed)
 		)
@@ -222,23 +256,33 @@ sub first_accessible_resource {
     if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db',
 	    &GDBM_READER(),0640)) {
 	$furl=$hash{'first_url'};
-	my %args;
-	my ($url,$args) = split(/\?/,$furl);
-	foreach my $pair (split(/\&/,$args)) {
+	my (%args,$url,$argstr);
+	if ($furl =~ m{^/enc/}) {
+	    ($url,$argstr) = split(/\?/,&Apache::lonenc::unencrypted($furl));
+	} else {
+	    ($url,$argstr) = split(/\?/,$furl);
+	}
+	foreach my $pair (split(/\&/,$argstr)) {
 	    my ($name,$value) = split(/=/,$pair);
 	    $args{&unescape($name)} = &unescape($value);
 	}
-        if (!&Apache::lonnet::allowed('bre',$url,$args{'symb'})) {
+        my $priv = &Apache::lonnet::allowed('bre',$url,$args{'symb'});
+        my $allowed = (($priv eq 'F') || ($priv eq '2') || ($priv eq 'A'));
+        if (!$allowed) {
 # Wow, we cannot see this ... move forward to the next one that we can see
-	    my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward');
+	    my ($newrid,$newmap)=&move($hash{'first_rid'},$hash{'first_mapurl'},'forward',1);
 # Build the new URL
-	    my ($newmapid,$newresid)=split(/\./,$newrid);
-	    my $symb=&Apache::lonnet::encode_symb($newmap,$newresid,$hash{'src_'.$newrid});
-	    $furl=&add_get_param($hash{'src_'.$newrid},{ 'symb' => $symb });
-	    if ($hash{'encrypted_'.$newrid}) {
-		$furl=&Apache::lonenc::encrypted($furl);
+            if ($newrid eq '') {
+                $furl = '/adm/navmaps';
+            } else {
+	        my ($newmapid,$newresid)=split(/\./,$newrid);
+	        my $symb=&Apache::lonnet::encode_symb($newmap,$newresid,$hash{'src_'.$newrid});
+	        $furl=&add_get_param($hash{'src_'.$newrid},{ 'symb' => $symb });
+	        if ($hash{'encrypted_'.$newrid}) {
+		    $furl=&Apache::lonenc::encrypted($furl);
+	        }
 	    }
-	}
+        }
 	untie(%hash);
 	return $furl;
     } else {
@@ -246,6 +290,79 @@ sub first_accessible_resource {
     }
 }
 
+sub first_answerable_ressymb {
+    my $navmap = Apache::lonnavmaps::navmap->new;
+    return unless (ref($navmap));
+    my $iterator = $navmap->getIterator(undef,undef,undef,1);
+    return unless (ref($iterator));
+    my ($curRes,$result);
+    while ($curRes = $iterator->next()) {
+        if (ref($curRes) && $curRes->is_problem()) {
+            foreach my $part (@{$curRes->parts()}) {
+                if ($curRes->tries($part) < $curRes->maxtries($part)) {
+                    $result = $curRes->link().'?symb='.$curRes->shown_symb();
+                    last;
+                }    
+            }
+        }
+    }
+    if ($result) {
+        return $result; 
+    } else {
+        return &first_accessible_resource(); 
+    }
+}
+
+sub check_http_req {
+    my ($srcref,$hostname) = @_;
+    return unless (ref($srcref) eq 'SCALAR');
+    my $usehttp;
+    if ($env{'request.course.id'}) {
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        if (($$srcref =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
+            ($ENV{'SERVER_PORT'} == 443) &&
+            ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
+            unless ((&Apache::lonnet::uses_sts()) ||
+                    (&Apache::lonnet::waf_allssl($hostname))) {
+                $$srcref .= (($$srcref =~/\?/)? '&':'?') . 'usehttp=1';
+                $usehttp = 1;
+            }
+        } elsif (($$srcref =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}) &&
+                 ($ENV{'SERVER_PORT'} == 443)) {
+            unless ((&Apache::lonnet::uses_sts()) ||
+                    (&Apache::lonnet::waf_allssl($hostname))) {
+                my ($url,$anchor) = ($$srcref =~ /^([^\#]+)(?:|(\#[^\#]+))$/);
+                $$srcref = $url . (($$srcref =~/\?/)? '&':'?') . 'usehttp=1' .$anchor; 
+                $usehttp = 1;
+            }
+        }
+    }
+    return $usehttp;
+}
+
+sub reinited_js {
+    my ($url,$cid,$timeout) = @_;
+    if (!$timeout) {
+        $timeout = 0;
+    }
+    return <<"END";
+<script type="text/javascript">
+// <![CDATA[
+setTimeout(function() {
+    var newurl = '$url';
+    if (document.getElementById('LC_update_$cid')) {
+        document.getElementById('LC_update_$cid').style.display = 'none';
+    }
+    if ((newurl !== null) && (newurl !== '') && (newurl !== 'undefined')) {
+        window.location.href = "$url";
+    }
+}, $timeout);
+// ]]>
+</script>
+END
+}
+
 # ================================================================ Main Handler
 
 sub handler {
@@ -262,81 +379,189 @@ sub handler {
   my %cachehash=(); 
   my $multichoice=0;
   my %multichoicehash=();
-  my ($redirecturl,$redirectsymb);
+  my %prog_state=();
+  my ($redirecturl,$redirectsymb,$enc,$anchor,$deeplinklevel);
   my $next='';
+  my $hostname = $r->hostname();
   my @possibilities=();
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']);
   if (($env{'form.postdata'})&&($env{'request.course.fn'})) {
-      $env{'form.postdata'}=~/(\w+)\:(.*)/;
-      my $direction=$1;
-      my $currenturl=$2;
+      my ($direction,$currenturl) = ($env{'form.postdata'}=~/(\w+)\:(.*)/);
       if ($currenturl=~m|^/enc/|) {
-	  $currenturl=&Apache::lonenc::unencrypted($currenturl);
+          $currenturl=&Apache::lonenc::unencrypted($currenturl);
       }
       $currenturl=~s/\.\d+\.(\w+)$/\.$1/;
+      $currenturl=~s/^https?\:\/\///;
+      $currenturl=~s/^[^\/]+//;
+      my ($preupdatepos,$last,$reinitcheck);
+      if ($direction eq 'return') {
+          if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+                    &GDBM_READER(),0640)) {
+              $last=$hash{'last_known'};
+              untie(%hash);
+          }
+      } elsif ($direction eq 'firstanswerable') {
+          my $furl = &first_answerable_ressymb();
+          my $usehttp = &check_http_req(\$furl,$hostname);
+          if (($usehttp) && ($hostname ne '')) {
+              $furl='http://'.$hostname.$furl;
+          } else {
+              $furl=&Apache::lonnet::absolute_url().$furl;
+          }
+          &Apache::loncommon::content_type($r,'text/html');
+          $r->header_out(Location => $furl);
+          return REDIRECT;
+      } elsif ($direction eq 'endplacement') {
+          &Apache::loncommon::content_type($r,'text/html');
+          $r->send_http_header;
+          $r->print(&Apache::lonplacementtest::showresult());
+          return OK;
+      }
+      if ($env{'request.course.id'}) {
+          # Check if course needs to be re-initialized
+          my $loncaparev = $r->dir_config('lonVersion');
+          ($reinitcheck,my @reinit) = &Apache::loncommon::needs_coursereinit($loncaparev);
+          if ($reinitcheck eq 'switch') {
+              &Apache::loncommon::content_type($r,'text/html');
+              $r->send_http_header;
+              $r->print(&Apache::loncommon::check_release_result(@reinit));
+              return OK;
+          } elsif ($reinitcheck eq 'update') {
+              my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+              my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+              $preupdatepos = &Apache::lonnet::symbread($currenturl);
+              unless ($direction eq 'return') {
+                  if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+                                &GDBM_READER(),0640)) {
+                      $last=$hash{'last_known'};
+                      untie(%hash);
+                  }
+              }
+              &Apache::loncommon::content_type($r,'text/html');
+              $r->send_http_header;
+              $r->print(&Apache::loncommon::start_page('Content Changed'));
+              my $preamble = '<div id="LC_update_'.$env{'request.course.id'}.'" class="LC_info">'.
+                             '<br />'.
+                             &mt('Your course session is being updated because of recent changes by course personnel.').
+                             ' '.&mt('Please be patient').'.<br /></div>'.
+                             '<div style="padding:0;clear:both;margin:0;border:0"></div>';
+              %prog_state = &Apache::lonhtmlcommon::Create_PrgWin($r,undef,$preamble);
+              &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Updating course'));
+              my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum");
+              &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Finished!'));
+              if ($ferr) {
+                  &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+                  my $requrl = $r->uri;
+                  $env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
+                  $env{'user.reinit'} = 1;
+                  return HTTP_NOT_ACCEPTABLE;
+              } else {
+                  if ($last) {
+                      my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last);
+                      unless (&Apache::lonnet::symbverify($last,$fn)) {
+                          undef($last);
+                      }
+                  }
+              }
+          }
+      }
       if ($direction eq 'firstres') {
 	  my $furl=&first_accessible_resource();
-	  &Apache::loncommon::content_type($r,'text/html');
-	  $r->header_out(Location => 
-			 &Apache::lonnet::absolute_url().$furl);
-	     
-	  return REDIRECT;
+          my $usehttp = &check_http_req(\$furl,$hostname);
+          if (($usehttp) && ($hostname ne '')) {
+              $furl='http://'.$hostname.$furl;
+          } else {
+              $furl=&Apache::lonnet::absolute_url().$furl;
+          }
+          if ($reinitcheck eq 'update') {
+              &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+              $r->print(&reinited_js($furl,$env{'request.course.id'},100));
+              $r->print(&Apache::loncommon::end_page());
+              return OK;
+          } else {
+	      &Apache::loncommon::content_type($r,'text/html');
+	      $r->header_out(Location => $furl);
+	      return REDIRECT;
+          }
       }
       if ($direction eq 'return') {
 # -------------------------------------------------------- Return to last known
-         my $last;
-         if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
-                    &GDBM_READER(),0640)) {
-	     $last=$hash{'last_known'};
-             untie(%hash);
-         }
-         my $newloc;
+         my ($newloc,$usehttp);
          if (($last) && (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'.db',
                         &GDBM_READER(),0640))) {
             my ($murl,$id,$fn)=&Apache::lonnet::decode_symb($last);
 	    $id=$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id;
 	    $newloc=$hash{'src_'.$id};
 	    if ($newloc) {
-		if ($hash{'encrypted_'.$id}) { $newloc=&Apache::lonenc::encrypted($newloc); }
-			      
+                $usehttp = &check_http_req(\$newloc,$hostname);
+		if ($hash{'encrypted_'.$id}) { 
+                    $newloc=&Apache::lonenc::encrypted($newloc);
+                }
+                if ($newloc =~ m{^(/adm/wrapper/ext/[^\#]+)(?:|(\#[^\#]+))$}) {
+                    my ($url,$anchor) = ($1,$2);
+                    if ($anchor) {
+                        $newloc = $url.(($url=~/\?/)?'&':'?').'symb='.&escape($last).$anchor;
+                    }
+                }
 	    } else {
 		$newloc='/adm/navmaps';
 	    }
             untie %hash;
          } else {
 	    $newloc='/adm/navmaps';
-         }  
+         }
+         if (($usehttp) && ($hostname ne '')) {
+             $newloc='http://'.$hostname.$newloc;
+         } else {
+             $newloc=&Apache::lonnet::absolute_url().$newloc
+         }
+         if ($reinitcheck eq 'update') {
+             $r->print(&reinited_js($newloc,$env{'request.course.id'},100));
+             $r->print(&Apache::loncommon::end_page());
+             return OK;
+         } else {
 	     &Apache::loncommon::content_type($r,'text/html');
-	     $r->header_out(Location => 
-			    &Apache::lonnet::absolute_url().$newloc);
-	     
+	     $r->header_out(Location => $newloc);
 	     return REDIRECT;
+         }
       }
-      $currenturl=~s/^https?\:\/\///;
-      $currenturl=~s/^[^\/]+//;
 #
 # Is the current URL on the map? If not, start with last known URL
 #
+
       unless (&Apache::lonnet::is_on_map($currenturl)) {
-	 my $last;
-         if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
-                    &GDBM_READER(),0640)) {
-	     $last=$hash{'last_known'};
+         if ($preupdatepos) {
+             undef($preupdatepos);
+         } elsif (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+                            &GDBM_READER(),0640)) {
+             $last=$hash{'last_known'};
              untie(%hash);
          }
          if ($last) {
 	     $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]);
 	 } else {
-		 &Apache::loncommon::content_type($r,'text/html');
-		 $r->header_out(Location => 
-				&Apache::lonnet::absolute_url().
-				'/adm/noidea.html');
-		 return REDIRECT;
+             my $newloc = &Apache::lonnet::absolute_url().
+                          '/adm/navmaps'; 
+             if ($reinitcheck eq 'update') {
+                 &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+                 $r->print(&reinited_js($newloc,$env{'request.course.id'},100));
+                 $r->print(&Apache::loncommon::end_page());
+                 return OK;
+             } else {
+	         &Apache::loncommon::content_type($r,'text/html');
+	         $r->header_out(Location => $newloc); 
+	         return REDIRECT;
+             }
          }
       }
 # ------------------------------------------- Do we have any idea where we are?
       my $position;
-      if ($position=Apache::lonnet::symbread($currenturl)) {
+      if ($preupdatepos) {
+          $position = $preupdatepos;
+      } else {
+          $position=Apache::lonnet::symbread($currenturl);
+      }
+      if ($position) {
 # ------------------------------------------------------------------------- Yes
 	  my ($startoutmap,$mapnum,$thisurl)=&Apache::lonnet::decode_symb($position);
           $cachehash{$startoutmap}{$thisurl}=[$thisurl,$mapnum];
@@ -359,7 +584,7 @@ sub handler {
                   @possibilities=split(/\,/,$next);
                   if ($#possibilities==0) {
 # ---------------------------------------------- Only one possibility, redirect
-	              ($redirecturl,$redirectsymb)=&hash_src($next);
+	              ($redirecturl,$redirectsymb,$enc,$anchor)=&hash_src($next);
                       $cachehash{$endupmap}{$redirecturl}=
 			  [$redirecturl,(split(/\./,$next))[1]];
                   } else {
@@ -384,12 +609,15 @@ sub handler {
 	      } else {
 # -------------------------------------------------------------- No place to go
                   $multichoice=-1;
+                  if ($hash{'deeplinkonly_'.$rid}) {
+                      (my $value,$deeplinklevel) = split(/:/,$hash{'deeplinkonly_'.$rid});
+                  }
               }
 # ----------------- The program must come past this point to untie the big hash
 	      untie(%hash);
 # --------------------------------------------------------- Store position info
               $cachehash{$startoutmap}{'last_direction'}=[$direction,'notasymb'];
-              foreach my $thismap (keys %cachehash) {
+              foreach my $thismap (keys(%cachehash)) {
 		  my $mapnum=$cachehash{$thismap}->{'mapnum'};
 		  delete($cachehash{$thismap}->{'mapnum'});
 		  &Apache::lonnet::symblist($thismap,
@@ -404,31 +632,45 @@ sub handler {
 		  if ($direction eq 'back') {
                      &Apache::lonnet::linklog($redirecturl,$currenturl);
 		  }
-# ------------------------------------------------- Check for critical messages
-		  if ((time-$env{'user.criticalcheck.time'})>300) {
-                     my @what=&Apache::lonnet::dump
-                                  ('critical',$env{'user.domain'},
-                                              $env{'user.name'});
-                     if ($what[0]) {
-	                if (($what[0] ne 'con_lost') && 
-                            ($what[0]!~/^error\:/)) {
-	                   $redirecturl='/adm/email?critical=display';
-			   $redirectsymb='';
-                        }
-                     }
-                     &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});
-		  }
-
-		  &Apache::loncommon::content_type($r,'text/html');
-		  my $url=&Apache::lonnet::absolute_url().$redirecturl;
-		  $url = &add_get_param($url, { 'symb' => $redirectsymb});
-                  $r->header_out(Location => $url);
-                  return REDIRECT;
+# ------------------------------------- Check for and display critical messages
+                  my ($redirect, $url) = &Apache::loncommon::critical_redirect(300,'flip');
+                  unless ($redirect) {
+                      my $usehttp = &check_http_req(\$redirecturl,$hostname);
+                      if (($usehttp) && ($hostname ne '')) {
+                          $url='http://'.$hostname.$redirecturl;
+                      } else {
+                          $url=&Apache::lonnet::absolute_url().$redirecturl;
+                      }
+                      my $addanchor;
+                      if (($anchor ne '') && (!$enc || $env{'request.role.adv'})) {
+                          $addanchor = 1;
+                          $url =~ s/\#.+$//;
+                      }
+                      $url = &add_get_param($url, { 'symb' => $redirectsymb});
+                      if ($addanchor) {
+                          $url .= $anchor;
+                      }
+                  }
+                  if ($reinitcheck eq 'update') {
+                      &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+                      $r->print(&reinited_js($url,$env{'request.course.id'},100)); 
+                      $r->print(&Apache::loncommon::end_page());
+                      return OK;
+                  } else {
+                      &Apache::loncommon::content_type($r,'text/html');
+                      $r->header_out(Location => $url);
+                      return REDIRECT;
+                  }
 	      } else {
 # --------------------------------------------------------- There was a problem
                   &Apache::loncommon::content_type($r,'text/html');
                   $r->send_http_header;
 		  my %lt=&Apache::lonlocal::texthash('title' => 'End of Sequence',
+                                                     'deeplink' => 'No link available',
+                                                     'deeplinkres' =>
+                                                     'Navigation to other content is unavailable when accessing content via deep-linking',
+                                                     'deeplinkmap' =>
+                                                     'You have reached the end of the sequence of available materials for access via deep-linking',
 						     'explain' =>
 						     'You have reached the end of the sequence of materials.',
 						     'back' => 'Go Back',
@@ -438,7 +680,11 @@ sub handler {
 						     'pick' =>
 						     'Please click on the the resource you intend to access',
 						     'titleheader' => 'Title',
-						     'type' => 'Type');
+						     'type' => 'Type',
+                                                     'update' => 'Content updated',
+                                                     'expupdate' => 'As a result of a recent update to the sequence of materials, it is not possible to complete the page flip.',
+                                                     'gonav' => 'Go to the Contents page to select a resource to display.',
+                                                     );
                   if (&Apache::loncommon::course_type() eq 'Community') {
                       $lt{'nav'} = &mt('Community Contents');
                   }
@@ -455,9 +701,14 @@ $lt{'pick'}:
 <tr><th>$lt{'titleheader'}</th><th>$lt{'type'}</th></tr>
 ENDSTART
                      foreach my $id (@possibilities) {
+                        my $src = $multichoicehash{'src_'.$id};
+                        my $usehttp = &check_http_req(\$src,$hostname);
+                        if (($usehttp) && ($hostname ne '')) {
+                            $src = 'http://'.$hostname.$src;
+                        }
                         $r->print(
                               '<tr><td><a href="'.
-				  &add_get_param($multichoicehash{'src_'.$id},
+				  &add_get_param($src,
 						 {'symb' =>
 						      $multichoicehash{'symb_'.$id},
 						  }).'">'.
@@ -467,27 +718,85 @@ ENDSTART
                      }
                      $r->print('</table>');
                   } else {
-                      $r->print(
-                          &Apache::loncommon::start_page('No Resource')
-                         .'<h2>'.$lt{'title'}.'</h2>'
-                         .'<p>'.$lt{'explain'}.'</p>');
-                  }
-                  $r->print(
-                      &Apache::lonhtmlcommon::actionbox(
-                          ['<a href="/adm/flip?postdata=return:">'.$lt{'back'}.'</a></li>',
-                           '<a href="/adm/navmaps">'.$lt{'nav'}.'</a></li>'
-                          ])
-                     .&Apache::loncommon::end_page());
+                      if ($reinitcheck) {
+                          if (&Apache::loncommon::course_type() eq 'Community') {
+                              $r->print(
+                                  &Apache::loncommon::start_page('Community Contents Updated'));
+                          } else { 
+                              $r->print(
+                                  &Apache::loncommon::start_page('Course Contents Updated'));
+                          }
+                          $r->print('<h2>'.$lt{'update'}.'</h2>'
+                                  .'<p>'.$lt{'expupdate'}.'<br />'
+                                  .$lt{'gonav'}.'</p>');
+                      } else {
+                          if (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') && 
+                              (!$env{'request.role.adv'})) {
+                              my ($score,$incomplete) = &Apache::lonplacementtest::check_completion(undef,undef,1); 
+                              if ($incomplete) {
+                                  $r->print(&Apache::lonplacementtest::showincomplete($incomplete)); 
+                              } else {
+                                  $r->print(&Apache::lonplacementtest::showresult(1));
+                              }
+                          } else {
+                              $r->print(
+                                  &Apache::loncommon::start_page('No Resource'));
+                              if ($deeplinklevel eq 'resource') {
+                                  $r->print('<h2>'.$lt{'deeplink'}.'</h2>'
+                                           .'<p>'.$lt{'deeplinkres'}.'</p>');
+                              } elsif ($deeplinklevel eq 'map') {
+                                  $r->print('<h2>'.$lt{'title'}.'</h2>'
+                                           .'<p>'.$lt{'deeplinkmap'}.'</p>');
+                              } else {
+                                  $r->print('<h2>'.$lt{'title'}.'</h2>'
+                                           .'<p>'.$lt{'explain'}.'</p>');
+                              }
+                          }
+                      }
+		  }
+                  unless (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') ||
+                          ($env{'request.role.adv'})) {
+                      if ($deeplinklevel) {
+                          $r->print(
+                              &Apache::lonhtmlcommon::actionbox(
+                                  ['<a href="/adm/flip?postdata=return:">'.$lt{'back'}.'</a>']));
+                      } elsif ((!@possibilities) && ($reinitcheck))  {
+                          $r->print(
+                              &Apache::lonhtmlcommon::actionbox(
+                                  ['<a href="/adm/navmaps">'.$lt{'nav'}.'</a></li>'
+                                  ]));
+                      } else {
+                          $r->print(
+                              &Apache::lonhtmlcommon::actionbox(
+                                  ['<a href="/adm/flip?postdata=return:">'.$lt{'back'}.'</a></li>',
+                                   '<a href="/adm/navmaps">'.$lt{'nav'}.'</a></li>'
+                                  ]));
+                      }
+
+                  }
+                  $r->print(&Apache::loncommon::end_page());
+      
                   return OK;
 	      }
 	  } else {
 # ------------------------------------------------- Problem, could not tie hash
+              if ($reinitcheck eq 'update') {
+                  &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+                  $r->print(&Apache::loncommon::end_page());
+              } 
               $env{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing";
               return HTTP_NOT_ACCEPTABLE; 
           }
       } else {
 # ---------------------------------------- No, could not determine where we are
-	  $r->internal_redirect('/adm/ambiguous');
+          my $newloc = '/adm/ambiguous';
+          if ($reinitcheck eq 'update') {
+              &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+              $r->print(&reinited_js($newloc,$env{'request.course.id'},100));
+              $r->print(&Apache::loncommon::end_page());
+          } else {
+	      $r->internal_redirect($newloc);
+          }
           return OK;
       }
   } else {