--- loncom/homework/lonhomework.pm	2018/08/14 18:24:04	1.372
+++ loncom/homework/lonhomework.pm	2023/07/23 16:11:52	1.378
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
 #
-# $Id: lonhomework.pm,v 1.372 2018/08/14 18:24:04 raeburn Exp $
+# $Id: lonhomework.pm,v 1.378 2023/07/23 16:11:52 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -50,6 +50,8 @@ use Apache::chemresponse();
 use Apache::functionplotresponse();
 use Apache::drawimage();
 use Apache::loncapamath();
+use Apache::loncourseuser();
+use Apache::grades();
 use Apache::Constants qw(:common);
 use Apache::loncommon();
 use Apache::lonparmset();
@@ -242,7 +244,8 @@ sub check_slot_access {
         $consumed_uniq = $slot{'uniqueperiod'};
         if ($slot{'iptied'}) {
             $ipused = $Apache::lonhomework::history{"$checkin.ip"};
-            unless (($ip ne '') && ($ipused eq $ip)) {
+            unless (($ip ne '') && 
+                    (($ipused eq $ip) || ($ENV{'REMOTE_ADDR'} eq '127.0.0.1'))) {
                 $blockip = $slot{'iptied'};
                 $slot_name = $checkinslot;
                 $returned_slot = \%slot;
@@ -276,6 +279,12 @@ sub check_slot_access {
 	        return ('SHOW_ANSWER');
             }
         }
+    } elsif (($type eq 'problem') &&
+             ($Apache::lonhomework::browse eq 'F') &&
+             ($ENV{'REMOTE_ADDR'} eq '127.0.0.1') &&
+             ($env{'form.grade_courseid'} eq $env{'request.course.id'}) &&
+             (&Apache::lonnet::allowed('mgr',$env{'request.course.id'}))) {
+        return ($status,$datemsg);
     }
 
     my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent",$symb);
@@ -362,16 +371,16 @@ sub check_slot_access {
                 my $probstatus = &Apache::structuretags::get_problem_status($part);
                 my $earlyout;
                 unless (($probstatus eq 'no') ||
-                        ($probstatus eq 'no_feedback_ever')) { 
+                        ($probstatus eq 'no_feedback_ever')) {
                     if ($Apache::lonhomework::history{"resource.$part.solved"} =~/^correct_/) {
                         $numcorrect ++;
                     } else {
                         $earlyout = 1;
                     }
                 }
-                if (($currtries == $maxtries) || ($is_correct)) {
+                if ($currtries == $maxtries) {
                     $earlyout = 1;
-                } else { 
+                } else {
                     $numgraded ++;
                 }
                 last if ($earlyout);
@@ -788,6 +797,9 @@ sub setuppermissions {
 	$env{'request.course.sec'} !~ /^\s*$/) {
 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                                                '/'.$env{'request.course.sec'});
+        if ($viewgrades) {
+            $Apache::lonhomework::viewgradessec = $env{'request.course.sec'};
+        }
     }
     $Apache::lonhomework::viewgrades = $viewgrades;
 
@@ -805,6 +817,9 @@ sub setuppermissions {
 	$modifygrades = 
 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
 				     '/'.$env{'request.course.sec'});
+        if ($modifygrades) {
+            $Apache::lonhomework::modifygradessec = $env{'request.course.sec'};
+        }
     }
     $Apache::lonhomework::modifygrades = $modifygrades;
 
@@ -823,7 +838,9 @@ sub setuppermissions {
 sub unset_permissions {
     undef($Apache::lonhomework::queuegrade);
     undef($Apache::lonhomework::modifygrades);
+    undef($Apache::lonhomework::modifygradessec);
     undef($Apache::lonhomework::viewgrades);
+    undef($Apache::lonhomework::viewgradessec);
     undef($Apache::lonhomework::browse);
 }
 
@@ -925,8 +942,17 @@ sub analyze_header {
     my $js = &Apache::structuretags::setmode_javascript();
 
     # Breadcrumbs
-    my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
-                   'text' => 'Authoring Space'},
+    my $text = 'Authoring Space';
+    my $href = &Apache::loncommon::authorspace($request->uri);
+    if ($env{'request.course.id'}) {
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        if ($href eq "/priv/$cdom/$cnum/") {
+            $text = 'Course Authoring Space';
+        }
+    }
+    my $brcrum = [{'href' => $href,
+                   'text' => $text},
                   {'href' => '',
                    'text' => 'Problem Testing'},
                   {'href' => '',
@@ -1158,8 +1184,17 @@ sub editxmlmode {
             &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
 
     # Breadcrumbs
-    my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
-                   'text' => 'Authoring Space'},
+    my $text = 'Authoring Space';
+    my $href = &Apache::loncommon::authorspace($request->uri);
+    if ($env{'request.course.id'}) {
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        if ($href eq "/priv/$cdom/$cnum/") {
+            $text = 'Course Authoring Space';
+        }
+    }
+    my $brcrum = [{'href' => $href,
+                   'text' => $text},
                   {'href' => '',
                    'text' => 'Problem Editing'}];
 
@@ -1194,27 +1229,27 @@ sub editxmlmode {
 
     unless ($env{'environment.nocodemirror'}) {
         # dropdown menus
-        $result .= Apache::lonmenu::create_submenu("#", "", 
+        $result .= Apache::lonmenu::create_submenu("#", "",
             &mt("Problem Templates"), template_dropdown_datastructure());
 
-        $result .= Apache::lonmenu::create_submenu("#", "", 
+        $result .= Apache::lonmenu::create_submenu("#", "",
             &mt("Response Types"), responseblock_dropdown_datastructure());
 
-        $result .= Apache::lonmenu::create_submenu("#", "", 
+        $result .= Apache::lonmenu::create_submenu("#", "",
             &mt("Conditional Blocks"), conditional_scripting_datastructure());
 
-        $result .= Apache::lonmenu::create_submenu("#", "", 
+        $result .= Apache::lonmenu::create_submenu("#", "",
             &mt("Miscellaneous"), misc_datastructure());
     }
 
-    $result .= Apache::lonmenu::create_submenu("#", "", 
+    $result .= Apache::lonmenu::create_submenu("#", "",
         &mt("Help") . ' <img src="/adm/help/help.png" alt="' . &mt("Help") .
-        '" style="vertical-align:text-bottom; height: auto; margin:0; "/>', 
+        '" style="vertical-align:text-bottom; height: auto; margin:0; "/>',
         helpmenu_datastructure(),"");
 
     $result.="</ol></div>";
-         
-    $result .= '</div></div>' . 
+
+    $result .= '</div></div>' .
         &Apache::lonxml::message_location() .
         &Apache::loncommon::xmleditor_js() .
         '<textarea ' . &Apache::edit::element_change_detection() .
@@ -1250,7 +1285,7 @@ sub editxmlmode {
                 autoCloseBrackets: true,
                 height: "auto",
                 styleActiveLine: true,
-                
+
                 extraKeys: {
                     "Tab": "indentMore",
                     "Shift-Tab": "indentLess",
@@ -1271,7 +1306,7 @@ sub editxmlmode {
 #    Render the page in whatever target desired.
 #
 sub renderpage {
-    my ($request,$file,$targets,$return_string,$donebuttonmsg) = @_;
+    my ($request,$file,$targets,$return_string,$donebuttonmsg,$viewasuser,$symb) = @_;
 
     my @targets = @{$targets || [&get_target()]};
     &Apache::lonhomework::showhashsubset(\%env,'form.');
@@ -1312,6 +1347,10 @@ sub renderpage {
 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
 
+        if (($target eq 'web') && ($viewasuser ne '') && ($symb ne '')) {
+            $env{'request.user_in_effect'} = $viewasuser;
+        }
+
 	&Apache::lonxml::debug("Should be parsing now");
 	$result .= &Apache::lonxml::xmlparse($request, $target, $problem,
 					     &setup_vars($target),%mystyle);
@@ -1337,15 +1376,23 @@ sub renderpage {
 	    #}
 #	    $request->print($result);
 	    $overall_result.=$result;
+            if (($target eq 'web') && ($viewasuser ne '') && ($symb ne '')) {
+                my ($vuname,$vudom) = split(/:/,$viewasuser);
+                $overall_result .= &Apache::grades::view_as_user($symb,$vuname,$vudom).
+                                   '</body></html>';
+            }
 #	    $request->rflush();
 	}
+        if (($target eq 'web') && ($viewasuser ne '') && ($symb ne '')) {
+            undef($env{'request.user_in_effect'});
+        }
 	#$request->print(":Result ends");
 	#my $td=&tv_interval($t0);
     }
     if (!$return_string) {
 	&Apache::lonxml::add_messages(\$overall_result);
 	$request->print($overall_result);   
-	$request->rflush();   
+	$request->rflush();
     } else {
 	return $overall_result;
     }
@@ -1364,7 +1411,7 @@ sub finished_parsing {
 # value 3: name of help topic ???
 sub get_template_list{
     my ($extension) = @_;
-    
+
     my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
                      '/templates/*.'.$extension);
     @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
@@ -1495,8 +1542,17 @@ sub newproblem {
 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
 	my $instructions;
-        my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
-                       'text' => 'Authoring Space'},
+        my $text = 'Authoring Space';
+        my $href = &Apache::loncommon::authorspace($request->uri);
+        if ($env{'request.course.id'}) {
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            if ($href eq "/priv/$cdom/$cnum/") {
+                $text = 'Course Authoring Space';
+            }
+        }
+        my $brcrum = [{'href' => $href,
+                       'text' => $text},
                       {'href' => '',
                        'text' => "Create New $extension"}];
 	my $start_page = 
@@ -1544,7 +1600,7 @@ sub update_construct_style {
 }
 
 #
-# Sets interval for current user so time left will be zero, either for the entire folder 
+# Sets interval for current user so time left will be zero, either for the entire folder
 # containing the current resource, or just the resource, depending on value of first item
 # in interval array retrieved from EXT("resource.0.interval");
 #
@@ -1568,7 +1624,7 @@ sub zero_timer {
                         $key =~ s/\s+$//;
                         if ($env{'form.LC_interval_done_proctorpass'} ne $secret) {
                             return ('fail',
-                                   &mt('Incorrect key entered by proctor')); 
+                                   &mt('Incorrect key entered by proctor'));
                         }
                     }
                     if ($first_access+$timelimit > $now) {
@@ -1591,7 +1647,7 @@ sub zero_timer {
                             return ('ok');
                         } else {
                             return ('fail',&mt('Error ending timed event: [_1]',$result));
-                        } 
+                        }
                     } else {
                         return ('fail',&mt('Timed event already ended'));
                     }
@@ -1622,7 +1678,7 @@ sub handler {
     #check if we know where we are
     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread('','',1,1)) {
 	# if we are browsing we might not be able to know where we are
-	if ($Apache::lonhomework::browse ne 'F' && 
+	if ($Apache::lonhomework::browse ne 'F' &&
 	    $env{'request.state'} ne "construct") {
 	    #should know where we are, so ask
 	    &unset_permissions();
@@ -1667,16 +1723,40 @@ sub handler {
     } else {
         # Set the event timer to zero if the "done button" was clicked.  The button is
         # part of the doneButton form created in lonmenu.pm
-        my ($donebuttonresult,$donemsg);
+        my ($donebuttonresult,$donemsg,$viewasuser);
         if ($symb && $env{'form.LC_interval_done'} eq 'true') {  
             ($donebuttonresult,$donemsg) = &zero_timer($symb);
             undef($env{'form.LC_interval_done'});
             undef($env{'form.LC_interval_done_proctorpass'});
         }
+        if (($env{'form.LC_viewas'} ne '') && $symb && $env{'request.course.id'} &&
+            ($Apache::lonhomework::viewgrades || $Apache::lonhomework::modifygrades)) {
+            if ($env{'form.LC_viewas'} =~ /^($match_username):($match_domain)$/) {
+                my ($possuname,$possudom) = ($1,$2);
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                my ($canview,$posssec);
+                if ($env{'request.course.sec'} ne '') {
+                    if ($Apache::lonhomework::modifygradessec eq $env{'request.course.sec'}) {
+                        $canview = 'section';
+                        $posssec = $env{'request.course.sec'};
+                    } elsif ($Apache::lonhomework::viewgradessec eq $env{'request.course.sec'}) {
+                        $canview = 'section';
+                        $posssec = $env{'request.course.sec'};
+                    }
+                }
+                my $crstype = &Apache::loncommon::course_type();
+                if (&Apache::loncourseuser::is_course_user($possudom,$possuname,$cdom,$cnum,
+                                                           $canview,$crstype,$posssec)) {
+                    $viewasuser = $possuname.':'.$possudom;
+                }
+            }
+            undef($env{'form.LC_viewas'});
+        }
 	# just render the page normally outside of construction space
 	&Apache::lonxml::debug("not construct");
         undef(@Apache::lonhomework::ltipassback);
-	&renderpage($request,$file,undef,undef,$donemsg);
+	&renderpage($request,$file,undef,undef,$donemsg,$viewasuser,$symb);
         if (@Apache::lonhomework::ltipassback) {
             unless ($registered_cleanup) {
                 my $handlers = $request->get_handlers('PerlCleanupHandler');
@@ -1877,15 +1957,19 @@ sub do_ltipassback {
             if (ref($item) eq 'HASH') {
                 if ((ref($item->{'lti'}) eq 'HASH') && ($item->{'cid'} =~ /^($match_domain)_($match_courseid)$/)) {
                     my ($cdom,$cnum) = ($1,$2);
-                    my $ckey = $item->{'lti'}->{'key'};
-                    my $secret = $item->{'lti'}->{'secret'};
+                    my $msgformat = $item->{'lti'}->{'passbackformat'};
+                    my $sigmethod = 'HMAC-SHA1';
+                    my $ltinum = $item->{'ltinum'};
                     my $id = $item->{'pbid'};
                     my $url = $item->{'pburl'};
+                    my $type = $item->{'pbtype'};
                     my $scope = $item->{'scope'};
                     my $map = $item->{'ltimap'};
                     my $symb = $item->{'ltisymb'};
                     my $uname = $item->{'uname'};
                     my $udom = $item->{'udom'};
+                    my $keynum = $item->{'lti'}->{'cipher'};
+                    my $crsdef = $item->{'crsdef'};
                     my $scoretype = $item->{'format'};
                     my ($total,$possible);
                     if ($scope eq 'resource') {
@@ -1896,8 +1980,8 @@ sub do_ltipassback {
                     } elsif ($scope eq 'course') {
                         ($total,$possible) = &get_lti_score($uname,$udom);
                     }
-                    if (($ckey ne '') && ($secret ne '') && ($id ne '') && ($url ne '') && ($possible)) {
-                        &LONCAPA::ltiutils::send_grade($id,$url,$ckey,$secret,$scoretype,$total,$possible);
+                    if (($id ne '') && ($url ne '') && ($possible)) {
+                        &LONCAPA::ltiutils::send_grade($cdom,$cnum,$crsdef,$type,$ltinum,$keynum,$id,$url,$scoretype,$sigmethod,$msgformat,$total,$possible);
                     }
                 }
             }