--- loncom/interface/lonexttool.pm	2023/01/23 18:38:26	1.22.2.2
+++ loncom/interface/lonexttool.pm	2022/03/29 20:12:46	1.23
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Launch External Tool Provider (LTI)
 #
-# $Id: lonexttool.pm,v 1.22.2.2 2023/01/23 18:38:26 raeburn Exp $
+# $Id: lonexttool.pm,v 1.23 2022/03/29 20:12:46 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -51,6 +51,8 @@ use Apache::lonnet;
 use Apache::loncommon;
 use Apache::londatecheck;
 use Apache::lonipcheck;
+use Apache::lonhomework;
+use Apache::structuretags;
 use LONCAPA::ltiutils;
 
 sub handler {
@@ -108,7 +110,7 @@ sub handler {
                                            width  => $toolsettings{'width'},
                                            height => $toolsettings{'height'},
                                        };
-                foreach my $item (qw(crslabel crstitle crsappend)) {
+                foreach my $item (qw(crslabel crstitle crsappend gradable)) {
                     $toolhash{$item} = $toolsettings{$item};
                 }
                 $is_tool = 1;
@@ -132,16 +134,37 @@ sub handler {
         my $title = &Apache::lonnet::gettitle($symb);
         $r->print(&mt('External Tool: [_1]','\textit{'.$title.'}').'\\\\');
     }
-    my ($status,$open,$close,$msg)=&Apache::londatecheck::content_date_check();
-    if ($status ne 'OPEN') {
-        if ($target eq 'tex') {
-            $r->print(&mt('Not open to be viewed').'\end{document}');
-        } else {
-            $r->print($msg);
+    if ($toolhash{'gradable'}) {
+        $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',$r->uri);
+        if ($env{'form.markaccess'}) {
+            my @interval=&Apache::lonnet::EXT('resource.0.interval',$symb);
+            my ($timelimit) = split(/_/,$interval[0]);
+            &Apache::lonnet::set_first_access($interval[1],$timelimit);
+        } elsif ($symb && $env{'form.LC_interval_done'} eq 'true') {
+            # Set the event timer to zero if the "done button" was clicked.  The button is
+            # part of the doneButton form created in lonmenu.pm
+            ($donebuttonresult,$donemsg) = &Apache::lonhomework::zero_timer($symb);
+            undef($env{'form.LC_interval_done'});
+            undef($env{'form.LC_interval_done_proctorpass'});
+        }
+        ($status,$msg) = &gradabletool_access_check($target);
+        undef($Apache::lonhomework::browse);
+        if ($status eq 'SHOW_ANSWER') {
+            $r->print(&display_score($target));
+            if ($target eq 'tex') {
+                $r->print('\end{document}');
+            }
+            return OK;
+        } elsif ($status ne 'CAN_ANSWER') {
+            if ($target eq 'tex') {
+                $r->print('\end{document}');
+            } else {
+                $r->print($msg);
+            }
+            return OK;
         }
-        return OK;
     } else {
-        ($status,$msg)=&Apache::lonipcheck::ip_access_check();
+        my ($status,$open,$close,$msg)=&Apache::londatecheck::content_date_check();
         if ($status ne 'OPEN') {
             if ($target eq 'tex') {
                 $r->print(&mt('Not open to be viewed').'\end{document}');
@@ -149,6 +172,16 @@ sub handler {
                 $r->print($msg);
             }
             return OK;
+        } else {
+            ($status,$msg)=&Apache::lonipcheck::ip_access_check();
+            if ($status ne 'OPEN') {
+                if ($target eq 'tex') {
+                    $r->print(&mt('Not open to be viewed').'\end{document}');
+                } else {
+                    $r->print($msg);
+                }
+                return OK;
+            }
         }
     }
     my $launchok = 1;
@@ -156,6 +189,20 @@ sub handler {
         $r->print('\end{document}');
     } else {
         my $now = time;
+        if ($toolhash{'passback'}) {
+            if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'grade',$now,
+                                                       \%toolsettings,\%toolhash) eq 'ok') {
+                $toolhash{'gradesecret'} = $toolsettings{'gradesecret'};
+            } else {
+                undef($launchok);
+            }
+        }
+        if ($toolhash{'roster'}) {
+            if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'roster',$now,
+                                                       \%toolsettings,\%toolhash) eq 'ok') {
+                $toolhash{'rostersecret'} = $toolsettings{'rostersecret'};
+            }
+        }
         my $submittext = &mt('Launch [_1]',$toolhash{'title'});
         if (($toolhash{'key'} ne '') && ($toolhash{'secret'} ne '') && 
             ($toolhash{'url'} ne '') && ($launchok)) {
@@ -176,10 +223,15 @@ sub handler {
 sub lti_params {
     my ($r,$cnum,$cdom,$idx,$submittext,$toolsref) = @_;
     my ($version,$context_type,$msgtype,$toolname,$passback,$roster,$locale,
-        $crslabel,$crstitle,%fields,%rolesmap,%display,%custom,@userlangs,$incdom);
+        $crslabel,$crstitle,$gradesecret,$rostersecret,%fields,%rolesmap,
+        %display,%custom,@userlangs,$incdom);
     if (ref($toolsref) eq 'HASH') {
         $version = $toolsref->{'version'};
         $toolname = $toolsref->{'title'};
+        $passback = $toolsref->{'passback'};
+        $gradesecret = $toolsref->{'gradesecret'};
+        $roster = $toolsref->{'roster'};
+        $rostersecret = $toolsref->{'rostersecret'};
         $msgtype = $toolsref->{'messagetype'};
         $incdom = $toolsref->{'incdom'};
         if (ref($toolsref->{'fields'}) eq 'HASH') {
@@ -288,6 +340,43 @@ sub lti_params {
         unless ($crsprotocol eq 'https') {
             $crsprotocol = 'http';
         }
+        if (($passback) || ($roster)) {
+            my (%currdigest,%digesthash);
+            if (@possdigest) {
+                %currdigest = &Apache::lonnet::get('exttools',\@possdigest,
+                                                   $cdom,$cnum);
+            }
+            if ($passback) {
+                $ltiparams{'lis_outcome_service_url'} = $crsprotocol.'://'.$crshostname.'/adm/service/passback';
+                $ltiparams{'ext_ims_lis_basic_outcome_url'} = $ltiparams{'lis_outcome_service_url'};
+                if ($gradesecret) {
+                    my $uniqid = $digest_symb.':::'.$digest_user.':::'.$env{'request.course.id'};
+                    $ltiparams{'lis_result_sourcedid'} = &LONCAPA::ltiutils::get_service_id($gradesecret,$uniqid);
+                }
+            }
+            if ($roster) {
+                if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+                    $ltiparams{'ext_ims_lis_memberships_url'} = $crsprotocol.'://'.$crshostname.'/adm/service/roster';
+                    if ($rostersecret) {
+                        my $uniqid = $digest_symb.':::'.$env{'request.course.id'};
+                        $ltiparams{'ext_ims_lis_memberships_id'} = &LONCAPA::ltiutils::get_service_id($rostersecret,$uniqid);
+                    }
+                }
+            }
+            if (($digest_symb) && ($gradesecret || $rostersecret)) {
+                unless ((exists($currdigest{$digest_symb})) && ($currdigest{$digest_symb} eq $symb)) {
+                    $digesthash{$digest_symb} = $symb;
+                }
+            }
+            if (($passback) && ($gradesecret)) {
+                unless ((exists($currdigest{$digest_user})) && ($currdigest{$digest_user} eq $uname.':'.$udom)) {
+                    $digesthash{$digest_user} = $uname.':'.$udom;
+                }
+            }
+            if (keys(%digesthash)) {
+                &Apache::lonnet::put('exttools',\%digesthash,$cdom,$cnum);
+            }
+        }
     }
     if ($display{'target'}) {
         $ltiparams{'launch_presentation_document_target'} = $display{'target'};
@@ -380,4 +469,97 @@ ENDJS
     return $form;
 }
 
+sub gradabletool_access_check {
+    my ($target) = @_;
+    my ($result,$resource_due);
+    my $status;
+    my ($symb,$courseid,$udom,$uname) = &Apache::lonnet::whichuser();
+    my @targets;
+    if ($target) {
+        @targets = ($target);
+    } elsif (defined($env{'form.submitted'}) && defined($env{'form.validate'})) {
+        @targets = ('grade','web');
+    } else {
+        @targets = ('web');
+    }
+    foreach my $target (@targets) {
+        &Apache::structuretags::initialize_storage($symb);
+        &Apache::lonhomework::set_show_problem_status(&Apache::lonnet::EXT('resource.0.problemstatus'));
+        my ($accessmsg,$slot_name,$slot,$ipused);
+        ($status,$accessmsg,$slot_name,$slot,$ipused) =
+            &Apache::lonhomework::check_slot_access('0','tool',$symb);
+        if (( $status eq 'CLOSED' ) ||
+            ( $status eq 'UNCHECKEDOUT') ||
+            ( $status eq 'NOT_YET_VIEWED') ||
+            ( $status eq 'BANNED') ||
+            ( $status eq 'UNAVAILABLE') ||
+            ( $status eq 'NOT_IN_A_SLOT') ||
+            ( $status eq 'NOTRESERVABLE') ||
+            ( $status eq 'RESERVABLE') ||
+            ( $status eq 'RESERVABLE_LATER') ||
+            ( $status eq 'INVALID_ACCESS') ||
+            ( $status eq 'NEED_DIFFERENT_IP') ||
+            ( $status eq 'WAITING_FOR_GRADE')) {
+            $result = &Apache::structuretags::access_status_msg('tool',$status,$symb,
+                                                                $target,$ipused,$accessmsg);
+        } elsif ($status eq 'NEEDS_CHECKIN') {
+            $result = &Apache::structuretags::checkin_prompt($target,$slot_name,$slot,'tool');
+        } elsif ($target eq 'web') {
+            if ($status eq 'CAN_ANSWER') {
+                $resource_due = &Apache::lonhomework::due_date(0, $env{'request.symb'});
+                if ($slot_name ne '') {
+                    $resource_due = &Apache::structuretags::selfcheckin_resource($resource_due,
+                                                                                 $slot_name,$slot,
+                                                                                 $env{'request.symb'});
+                }
+            }
+        }
+        if (keys(%Apache::lonhomework::results)) {
+            &Apache::structuretags::finalize_storage();
+        }
+    }
+    return ($status,$result,$resource_due);
+}
+
+sub display_score {
+    my ($target) = @_;
+    my $weight = &Apache::lonnet::EXT('resource.0.weight');
+    if ((!defined($weight)) || ($weight eq '')) { $weight=1; }
+    my $awarded = $Apache::lonhomework::history{'resource.0.awarded'};
+    if (!defined($awarded)) { $awarded=0; }
+    my $display='';
+    if ($target eq 'tex') {
+        $display = '\\\\';
+    }
+    if (!defined($awarded)) {
+        $display .= &mt('[_1] possible points.',$weight);
+    } else {
+        my $points = $awarded*$weight;
+        my $result = sprintf('%.2f',$points);
+        $display .= &mt('You have [_1] out of [quant,_2,possible point]',
+                       $result,$weight);
+    }
+    my $comment = $Apache::lonhomework::history{'resource.0.comment'};
+    if (!defined($comment) || $comment!~/\w/) {
+        $comment='';
+    } else {
+        if ($target eq 'tex') {
+            $comment = '\\\\'.$comment;
+        } else {
+            $comment='<br /><table><tr><td bgcolor="#FFFFDD">'.$comment.'</td></tr></table>';
+        }
+    }
+    my $gradeinfo = $Apache::lonhomework::history{'resource.0.gradeinfo'};
+    if (!defined($gradeinfo) || $gradeinfo!~/\w/) {
+        $gradeinfo='';
+    } else {
+        if ($target eq 'tex') {
+            $gradeinfo = '\\\\'.$gradeinfo;
+        } else {
+            $gradeinfo='<br /><table><tr><td bgcolor="#DDDDFF"><font size="+2">'.$gradeinfo.'</font></td></tr></table>';
+        }
+    }
+    return $display.$comment.$gradeinfo;
+}
+
 1;