--- rat/lonwrapper.pm	2016/11/30 17:40:39	1.49.2.3
+++ rat/lonwrapper.pm	2020/01/14 14:26:39	1.70
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Wrapper for external and binary files as standalone resources
 #
-# $Id: lonwrapper.pm,v 1.49.2.3 2016/11/30 17:40:39 raeburn Exp $
+# $Id: lonwrapper.pm,v 1.70 2020/01/14 14:26:39 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -37,22 +37,26 @@ use Apache::lonlocal;
 use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::lonextresedit();
+use Apache::lonexttool();
+use Apache::lonhomework();
+use LONCAPA qw(:DEFAULT :match);
+use HTML::Entities();
 
 # ================================================================ Main Handler
 sub wrapper {
-    my ($url,$brcrum,$absolute,$is_ext,$is_pdf,$title) = @_;
+    my ($r,$url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool,$linktext,$explanation,
+        $title,$width,$height) = @_;
 
     my $forcereg;
     unless ($env{'form.folderpath'}) {
         $forcereg = 1;
     }
-
     my %lt = &Apache::lonlocal::texthash(
                                           'noif' => 'No iframe support.',
                                           'show' => 'Show content in pop-up window',
                                         );
 
-    my $anchor;
+    my ($anchor,$uselink);
     if ($is_ext) {
         if ($env{'form.symb'}) {
             (undef,undef,my $res) = &Apache::lonnet::decode_symb($env{'form.symb'});
@@ -62,6 +66,12 @@ sub wrapper {
         } elsif ($env{'form.anchor'} ne '') {
             $anchor = '#'.$env{'form.anchor'};
         }
+        unless (($is_pdf) && ($env{'browser.mobile'})) {
+            my $hostname = $r->hostname();
+            my $lonhost = $r->dir_config('lonHostID');
+            my $ip = &Apache::lonnet::get_host_ip($lonhost);
+            $uselink = &Apache::loncommon::is_nonframeable($url,$absolute,$hostname,$ip);
+        }
     }
 
     my $noiframe = &Apache::loncommon::modal_link($url.$anchor,$lt{'show'},500,400);
@@ -73,37 +83,138 @@ sub wrapper {
         $args->{'bread_crumbs'} = $brcrum;
     }
     if ($absolute) {
-        $args->{'use_absolute'} = $absolute; 
+        $args->{'use_absolute'} = $absolute;
+    }
+    if ($env{'form.only_body'}) {
+        $args->{'only_body'} = $env{'form.only_body'};
+    }
+
+    my ($countdown,$donemsg);
+    if (($exttool) && (&Apache::lonnet::EXT('resource.0.gradable') =~ /^yes$/i)) {
+        $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',$url);
+        if ($env{'form.markaccess'}) {
+            my $symb=&Apache::lonnet::symbread($url);
+            my @interval=&Apache::lonnet::EXT('resource.0.interval',$symb);
+            my ($timelimit) = split(/_/,$interval[0]);
+            my $setres = &Apache::lonnet::set_first_access($interval[1],$timelimit);
+            if ($setres eq 'ok') {
+                delete($env{'form.markaccess'});
+            }
+        } elsif ($env{'form.LC_interval_done'} eq 'true') {
+            my $symb=&Apache::lonnet::symbread($url);
+            if ($symb) {
+                (my $donebuttonresult,$donemsg) = &Apache::lonhomework::zero_timer($symb);
+                undef($env{'form.LC_interval_done'});
+                undef($env{'form.LC_interval_done_proctorpass'});
+            }
+        }
+        my ($status,$result,$resource_due) =
+            &Apache::lonexttool::gradabletool_access_check();
+        undef($Apache::lonhomework::browse);
+        if ($status eq 'CAN_ANSWER') {
+            if ($resource_due) {
+                my $time_left = $resource_due - time();
+                if ($resource_due && ($time_left > 0)) {
+                    $countdown ='
+<script type="text/javascript">
+// <![CDATA['."\n".
+                             &Apache::lonhtmlcommon::countdown().'
+// ]]>
+</script>'."\n".
+                    &Apache::lonhtmlcommon::set_due_date($resource_due);
+                }
+            }
+        } else {
+            if ($status eq 'SHOW_ANSWER') {
+                $result = &Apache::lonexttool::display_score().
+                          &Apache::lonfeedback::list_discussion('tool','OPEN');
+            }
+            return &Apache::loncommon::start_page('Menu',undef,$args).
+                   $result.
+                   &Apache::loncommon::end_page();
+        }
     }
 
-    my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
+    my $startpage = &Apache::loncommon::start_page('Menu',undef,$args).$countdown.$donemsg;
     my $endpage = &Apache::loncommon::end_page();
 
-    if ($env{'browser.mobile'}) {
+    if (($uselink) && ($title eq '')) {
+        if ($env{'form.symb'}) {
+            $title=&Apache::lonnet::gettitle($env{'form.symb'});
+        } else {
+            my $symb=&Apache::lonnet::symbread($r->uri);
+            if ($symb) {
+                $title=&Apache::lonnet::gettitle($symb);
+            }
+        }
+    }
+    if (($env{'browser.mobile'}) || ($exttool eq 'window') || ($exttool eq 'tab')) {
         my $output = $startpage;
         if ($is_pdf) {
-            if ($title eq '') {
-                $title = $env{'form.title'};
-                if ($title eq '') {
-                    unless ($env{'request.enc'}) {
-                        ($title) = ($url =~ m{/([^/]+)$});
-                        $title =~ s/(\?[^\?]+)$//;
-                    }
-                }
+            $linktext = &mt('Link to PDF (for mobile devices)');
+            $output .= &create_link($url,$anchor,$title,$linktext);
+        } elsif (($exttool eq 'window') || ($exttool eq 'tab')) {
+            if ($linktext eq '') {
+                $linktext = &mt('Launch External Tool');
             }
-            unless ($title eq '') {
-                $output .= $title.'<br />';
+            $url = &HTML::Entities::encode($url,'"<>&');
+            if ($exttool eq 'tab') {
+                $output .= '<div>'.
+                           '<a href="'.$url.'" target="LCExternalToolTab" style="padding:0;clear:both;margin:0;border:0">'.
+                           $linktext.'</a>'.
+                           '</div>';
+            } else {
+                $output .= <<"ENDLINK";
+<script type="text/javascript">
+// <![CDATA[
+var windowObjectReference = null;
+var PreviousUrl;
+
+function openSinglePopup(strUrl) {
+    if (windowObjectReference == null || windowObjectReference.closed) {
+        windowObjectReference = window.open(strUrl, "LCExternalToolPopUp",
+                                            "height=$height,width=$width,scrollbars=yes,resizable=yes,status=yes,menubar=no,location=no'");
+    } else if(PreviousUrl != strUrl) {
+        windowObjectReference = window.open(strUrl, "LCExternalToolPopUp",
+                                            "height=$height,width=$width,scrollbars=yes,resizable=yes,status=yes,menubar=no,location=no'");
+        windowObjectReference.focus();
+    } else {
+        windowObjectReference.focus();
+    };
+    PreviousUrl = strUrl;
+}
+// ]]>
+</script>
+<div>
+<a href="$url" target="LCExternalToolPopUp" onclick="openSinglePopup(this.href); return false;">
+$linktext</a>
+</div>
+ENDLINK
+            }
+            if ($explanation ne '') {
+                $output .= '<div>'.$explanation.'</div>';
+            }
+            if (&Apache::lonnet::EXT('resource.0.gradable')) {
+                $output .= &Apache::lonfeedback::list_discussion('tool','OPEN');
             }
-            $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
         } else {
-            $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
-                       '<iframe src="'.$url.$anchor.'" height="100%" width="100%" frameborder="0">'."\n".
-                       "$lt{'noif'} $noiframe\n".
-                       "</iframe>\n".
-                       "</div>\n";
+            if ($uselink) {
+                $linktext = &mt('Link to resource');
+                $output .= &create_link($url,$anchor,$title,$linktext);
+            } else {
+                my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
+                $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
+                           '<iframe src="'.$dest.'" height="100%" width="100%" frameborder="0">'."\n".
+                           "$lt{'noif'} $noiframe\n".
+                           "</iframe>\n".
+                           "</div>\n";
+            }
         }
         $output .= $endpage;
         return $output;
+    } elsif ($uselink) {
+        $linktext = &mt('Link to resource');
+        return $startpage.&create_link($url,$anchor,$title,$linktext).$endpage;
     } else {
         my $offset = 5;
         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['inhibitmenu']);
@@ -136,17 +247,38 @@ sub wrapper {
         window.onload = function(){  \$(window).trigger('resize') };
 SCRIPT
         # javascript will position the iframe if window was resized (or zoomed)
+        my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
         return <<ENDFRAME;
         $startpage
         $script
         <div class="LC_iframecontainer">
-            <iframe src="$url$anchor">$lt{'noif'} $noiframe</iframe>
+            <iframe src="$dest">$lt{'noif'} $noiframe</iframe>
         </div>
         $endpage
 ENDFRAME
     }
 }
 
+sub create_link {
+    my ($url,$anchor,$title,$linktext) = @_;
+    my $shownlink;
+    if ($title eq '') {
+        $title = $env{'form.title'};
+        if ($title eq '') {
+            unless ($env{'request.enc'}) {
+                ($title) = ($url =~ m{/([^/]+)$});
+                $title =~ s/(\?[^\?]+)$//;
+            }
+        }
+    }
+    unless ($title eq '') {
+        $shownlink = '<span style="font-weight:bold;">'.$title.'</span><br />';
+    }
+    my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
+    $shownlink .= '<a href="'.$dest.'">'.$linktext.'</a>';
+    return $shownlink;
+}
+
 sub handler {
     my $r=shift;
     &Apache::loncommon::content_type($r,'text/html');
@@ -155,20 +287,47 @@ sub handler {
     return OK if $r->header_only;
 
     my $url = $r->uri;
-    my ($is_ext,$brcrum,$absolute,$is_pdf);
+    my ($is_ext,$brcrum,$absolute,$is_pdf,$exttool,$cdom,$cnum,$hostname,
+        $linktext,$explanation,$width,$height);
 
     for ($url){
         s|^/adm/wrapper||;
         $is_ext = $_ =~ s|^/ext/|http://|;         
         s|http://https://|https://|;
-        s|&colon;|:|g;              
+        s|&colon;|:|g;
     }
 
     if ($url =~ /\.pdf$/i) {
         $is_pdf = 1;
+    } elsif ($url =~ m{^/adm/($match_domain)/($match_courseid)/(\d+)/ext\.tool$}) {
+        $cdom = $1;
+        $cnum = $2;
+        my $marker = $3;
+        $exttool = 'iframe';
+        my $exttoolremote;
+        my %toolhash = &Apache::lonnet::get('exttool_'.$marker,['target','linktext','explanation','id','width','height'],
+                                            $cdom,$cnum);
+        if ($toolhash{'id'}) {
+            my %ltitools = &Apache::lonnet::get_domain_lti($cdom,'consumer');
+            if (ref($ltitools{$toolhash{'id'}}) eq 'HASH') {
+                $exttoolremote = $ltitools{$toolhash{'id'}}{'url'};
+            }
+        }
+        if ($toolhash{'target'} eq 'window') {
+            $exttool = 'window';
+            $width = $toolhash{'width'};
+            $height = $toolhash{'height'};
+        } elsif ($toolhash{'target'} eq 'tab') {
+            $exttool = 'tab';
+        }
+        if (($exttool eq 'window') || ($exttool eq 'tab')) {
+            $linktext = $toolhash{'linktext'};
+            $explanation = $toolhash{'explanation'};
+        } elsif (($exttoolremote =~ /^http:/) && ($ENV{'SERVER_PORT'} == 443)) {
+            $exttool = 'tab';
+        }
     }
- 
-    if ($is_ext) {
+    if (($is_ext) || ($exttool)) {
         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
             ['forceedit','register','folderpath','symb','idx','title','anchor']);
         if (($env{'form.forceedit'}) &&
@@ -185,16 +344,27 @@ sub handler {
                     $url .= '#'.$env{'form.anchor'};
                 }
             }
+            my $type = 'ext';
+            if ($exttool) {
+                $type = 'tool';
+            } elsif (($url =~ /^http:/) && ($ENV{'SERVER_PORT'} == 443)) {
+                $hostname = $r->hostname();
+            }
             $r->print(
                 &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
                                                        $env{'form.symb'},
-                                                       $env{'form.idx'}));
+                                                       $env{'form.idx'},$type,$cdom,
+                                                       $cnum,$hostname));
             return OK;
         } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
             my $crstype = &Apache::loncommon::course_type();
             my $title = $env{'form.title'};
             if ($title eq '') {
-                $title = &mt('External Resource');
+                if ($is_ext) {
+                    $title = &mt('External Resource');
+                } else {
+                    $title = &mt('External Tool');
+                }
             }
             $brcrum =
                 &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
@@ -204,7 +374,7 @@ sub handler {
 #
 # Actual URL
 #
-    if ($url=~/$LONCAPA::assess_re/) {
+    if (($url=~/$LONCAPA::assess_re/) && (!$exttool)) {
 #
 # This is uploaded homework
 #
@@ -214,7 +384,7 @@ sub handler {
 #
 # This is not homework
 #
-        if ($is_ext) {
+        if (($is_ext) || ($exttool)) {
             $absolute = $env{'request.use_absolute'};
             $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
             $ENV{'QUERY_STRING'} =~ s/\&$//;
@@ -225,9 +395,12 @@ sub handler {
         }
 
         # encrypt url if not external
-        &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
+        unless ($is_ext) {
+            &Apache::lonenc::check_encrypt(\$url);
+        }
 
-        $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf) );
+        $r->print( wrapper($r,$url,$brcrum,$absolute,$is_ext,$is_pdf,$exttool,
+                           $linktext,$explanation,undef,$width,$height) );
 
     } # not just the menu
     
@@ -254,10 +427,14 @@ described at http://www.lon-capa.org.
 
 =over
 
-=item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf,$title))
+=item wrapper($r,$url,$brcrum,$absolute,$is_ext,$is_pdf,$linktext,$explanation,$title,$width,$height)
 
 =over
 
+=item $r
+
+request object
+
 =item $url
 
 url to display by including in an iframe within a