--- rat/lonpageflip.pm	2018/09/10 19:17:39	1.80.8.10
+++ rat/lonpageflip.pm	2017/11/16 13:42:01	1.97
@@ -2,7 +2,7 @@
 #
 # Page flip handler
 #
-# $Id: lonpageflip.pm,v 1.80.8.10 2018/09/10 19:17:39 raeburn Exp $
+# $Id: lonpageflip.pm,v 1.97 2017/11/16 13:42:01 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,6 +36,7 @@ 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;
@@ -255,6 +256,49 @@ 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) = @_;
+    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 (($$srcref =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
+            ($ENV{'SERVER_PORT'} == 443) &&
+            ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
+            $$srcref .= (($$srcref =~/\?/)? '&':'?') . 'usehttp=1';
+            $usehttp = 1;
+        } elsif (($$srcref =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}) &&
+                 ($ENV{'SERVER_PORT'} == 443)) {
+            $usehttp = 1;
+        }
+    }
+    return $usehttp;
+}
+
 sub reinited_js {
     my ($url,$cid,$timeout) = @_;
     if (!$timeout) {
@@ -293,9 +337,10 @@ sub handler {
   my %cachehash=(); 
   my $multichoice=0;
   my %multichoicehash=();
-  my %prog_state=(); 
+  my %prog_state=();
   my ($redirecturl,$redirectsymb,$enc,$anchor);
   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'})) {
@@ -313,6 +358,22 @@ sub handler {
               $last=$hash{'last_known'};
               untie(%hash);
           }
+      } elsif ($direction eq 'firstanswerable') {
+          my $furl = &first_answerable_ressymb();
+          my $usehttp = &check_http_req(\$furl);
+          if (($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
@@ -364,7 +425,12 @@ sub handler {
       }
       if ($direction eq 'firstres') {
 	  my $furl=&first_accessible_resource();
-          $furl=&Apache::lonnet::absolute_url().$furl;
+          my $usehttp = &check_http_req(\$furl);
+          if (($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,$env{'request.course.id'},100));
@@ -378,14 +444,19 @@ sub handler {
       }
       if ($direction eq 'return') { 
 # -------------------------------------------------------- Return to last known
-         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); }
+                $usehttp = &check_http_req(\$newloc);
+		if ($hash{'encrypted_'.$id}) { 
+                    $newloc=&Apache::lonenc::encrypted($newloc);
+                } elsif ($newloc =~ m{^(/adm/wrapper/ext/[^\#]+)\#([^\#]+)$}) {
+                    $newloc = $1.&escape('#').$2;
+                }
 	    } else {
 		$newloc='/adm/navmaps';
 	    }
@@ -393,15 +464,19 @@ sub handler {
          } else {
 	    $newloc='/adm/navmaps';
          }
-         $newloc=&Apache::lonnet::absolute_url().$newloc;
+         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 => $newloc);
-             return REDIRECT;
+	     &Apache::loncommon::content_type($r,'text/html');
+	     $r->header_out(Location => $newloc);
+	     return REDIRECT;
          }
       }
 #
@@ -416,19 +491,20 @@ sub handler {
              $last=$hash{'last_known'};
              untie(%hash);
          }
+         my $newloc;
          if ($last) {
 	     $currenturl=&Apache::lonnet::clutter((&Apache::lonnet::decode_symb($last))[2]);
 	 } else {
              my $newloc = &Apache::lonnet::absolute_url().
-                          '/adm/navmaps';
+                          '/adm/navmaps'; 
              if ($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 => $newloc);
+	         &Apache::loncommon::content_type($r,'text/html');
+	         $r->header_out(Location => $newloc); 
 	         return REDIRECT;
              }
          }
@@ -509,9 +585,14 @@ sub handler {
                      &Apache::lonnet::linklog($redirecturl,$currenturl);
 		  }
 # ------------------------------------- Check for and display critical messages
-                  my ($redirect, $url) = &Apache::loncommon::critical_redirect(300);
+                  my ($redirect, $url) = &Apache::loncommon::critical_redirect(300,'flip');
                   unless ($redirect) {
-                      $url=&Apache::lonnet::absolute_url().$redirecturl;
+                      my $usehttp = &check_http_req(\$redirecturl);
+                      if (($usehttp) && ($hostname ne '')) {
+                          $url='http://'.$hostname.$redirecturl;
+                      } else {
+                          $url=&Apache::lonnet::absolute_url().$redirecturl;
+                      }
                       my $addanchor;
                       if (($anchor ne '') && (!$enc || $env{'request.role.adv'})) {
                           $addanchor = 1;
@@ -524,7 +605,7 @@ sub handler {
                   }
                   if ($reinitcheck eq 'update') {
                       &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
-                      $r->print(&reinited_js($url,$env{'request.course.id'},100));
+                      $r->print(&reinited_js($url,$env{'request.course.id'},100)); 
                       $r->print(&Apache::loncommon::end_page());
                       return OK;
                   } else {
@@ -549,7 +630,8 @@ sub handler {
 						     '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.');
+                                                     'gonav' => 'Go to the Contents page to select a resource to display.',
+                                                     );
                   if (&Apache::loncommon::course_type() eq 'Community') {
                       $lt{'nav'} = &mt('Community Contents');
                   }
@@ -566,9 +648,14 @@ $lt{'pick'}:
 <tr><th>$lt{'titleheader'}</th><th>$lt{'type'}</th></tr>
 ENDSTART
                      foreach my $id (@possibilities) {
+                        my $src = $multichoicehash{'src_'.$id};
+                        my $usehttp = &check_http_req(\$src);
+                        if (($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},
 						  }).'">'.
@@ -590,23 +677,37 @@ ENDSTART
                                   .'<p>'.$lt{'expupdate'}.'<br />'
                                   .$lt{'gonav'}.'</p>');
                       } else {
-                          $r->print(
-                              &Apache::loncommon::start_page('No Resource')
-                             .'<h2>'.$lt{'title'}.'</h2>'
-                             .'<p>'.$lt{'explain'}.'</p>');
+                          if (($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 {  
+                              $r->print(
+                                  &Apache::loncommon::start_page('No Resource')
+                                 .'<h2>'.$lt{'title'}.'</h2>'
+                                 .'<p>'.$lt{'explain'}.'</p>');
+                          }
                       }
 		  }
-                  if ((!@possibilities) && ($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">'.$lt{'nav'}.'</a></li>'
-                              ]));
+                  unless (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') ||
+                          ($env{'request.role.adv'})) {
+                      if ((!@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());
       
@@ -617,7 +718,7 @@ ENDSTART
               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; 
           }