--- loncom/interface/lontiny.pm	2023/01/21 21:16:25	1.8.2.4
+++ loncom/interface/lontiny.pm	2024/11/17 04:48:15	1.23
@@ -2,7 +2,7 @@
 # Extract domain, courseID, and symb from a shortened URL,
 # and switch role to a role in designated course.
 #
-# $Id: lontiny.pm,v 1.8.2.4 2023/01/21 21:16:25 raeburn Exp $
+# $Id: lontiny.pm,v 1.23 2024/11/17 04:48:15 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -68,7 +68,7 @@ sub handler {
                         my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
                         if ($chome ne 'no_host') {
                             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['ttoken']);
-                            my ($linkprot,$linkprotuser,$linkprotexit,$ltoken);
+                            my ($linkprot,$linkprotuser,$linkprotexit,$ltoken,$linkprotpbid,$linkprotpburl);
                             if ($env{'form.ttoken'}) {
                                 my %link_info = &Apache::lonnet::tmpget($env{'form.ttoken'});
                                 if ($link_info{'origurl'} eq $r->uri) {
@@ -78,6 +78,8 @@ sub handler {
                                         $linkprot = $ltoken_info{'linkprot'};
                                         $linkprotuser = $ltoken_info{'linkprotuser'};
                                         $linkprotexit = $ltoken_info{'linkprotexit'};
+                                        $linkprotpbid = $ltoken_info{'linkprotpbid'};
+                                        $linkprotpburl = $ltoken_info{'linkprotpburl'};
                                     } elsif ($link_info{'linkprot'}) {
                                         $linkprot = $link_info{'linkprot'};
                                         if ($link_info{'linkprotuser'}) {
@@ -86,12 +88,18 @@ sub handler {
                                         if ($link_info{'linkprotexit'}) {
                                             $linkprotexit = $link_info{'linkprotexit'};
                                         }
+                                        if ($link_info{'linkprotpbid'}) {
+                                            $linkprotpbid = $link_info{'linkprotpbid'};
+                                        }
+                                        if ($link_info{'linkprotpburl'}) {
+                                            $linkprotpburl = $link_info{'linkprotpburl'};
+                                        }
                                     }
                                 }
                             }
                             if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
                                 # Check for ttoken
-                                my $newlauncher = &launch_check($r->uri,$symb);
+                                my $newlauncher = &launch_check($r->uri,$symb,$cdom,$cnum);
                                 my ($map,$resid,$url) = &Apache::lonnet::decode_symb($symb);
                                 if (&Apache::lonnet::is_on_map($url)) {
                                     my $realuri;
@@ -220,13 +228,40 @@ sub handler {
                                     }
                                 }
                                 my @allposs = keys(%active);
+                                if ($env{'request.lti.login'}) {
+                                    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
+                                    if ($env{'request.lti.target'} eq '') {
+                                        if ($env{'form.ltitarget'} eq 'iframe') {
+                                            &Apache::lonnet::appenv({'request.lti.target' => 'iframe'});
+                                            delete($env{'form.ltitarget'});
+                                        }
+                                    }
+                                    if ($env{'form.selectrole'}) {
+                                        foreach my $role (@allposs) {
+                                            my $newrole = "$role./$cdom/$cnum";
+                                            if ($possroles{$allposs[0]} ne '') {
+                                                $newrole .= "/$possroles{$role}";
+                                            }
+                                            if ($env{"form.$newrole"}) {
+                                                my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
+                                                                   '&destinationurl='.&HTML::Entities::encode($r->uri,'&<>"');
+                                                if ($env{'form.ltitarget'} eq 'iframe') {
+                                                    $destination .= '&ltitarget=iframe';
+                                                }
+                                                &do_redirect($r,$destination);
+                                                return OK;
+                                            }
+                                        }
+                                    }
+                                }
                                 if (@allposs == 0) {
-                                    &show_roles($r,\%crsenv,\%active,'','',\%future,\%expired,$linkprot,$linkprotuser,$linkprotexit,$ltoken);
+                                    &show_roles($r,\%crsenv,\%active,'','',\%future,\%expired,$linkprot,$linkprotuser,
+                                                $linkprotexit,$linkprotpbid,$linkprotpburl,$ltoken);
                                 } elsif (@allposs == 1) {
                                     my $newrole = "$allposs[0]./$cdom/$cnum";
                                     $newrole = "$allposs[0]./$cdom/$cnum";
                                     if ($possroles{$allposs[0]} ne '') {
-                                        $newrole .= "/$possroles{$allposs[0]}"; 
+                                        $newrole .= "/$possroles{$allposs[0]}";
                                     }
                                     my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
                                                        '&destinationurl='.&HTML::Entities::encode($r->uri,'&<>"');
@@ -272,8 +307,9 @@ sub handler {
 }
 
 sub launch_check {
-    my ($linkuri,$symb) = @_;
-    my ($linkprotector,$linkproturi,$linkprotexit,$linkkey,$newlauncher);
+    my ($linkuri,$symb,$cdom,$cnum) = @_;
+    my ($linkprotector,$linkproturi,$linkprotexit,$linkprotpbid,$linkprotpburl,
+        $linkkey,$newlauncher,$prevlaunch);
     if ($env{'form.ttoken'}) {
         my %link_info = &Apache::lonnet::tmpget($env{'form.ttoken'});
         &Apache::lonnet::tmpdel($env{'form.ttoken'});
@@ -314,6 +350,12 @@ sub launch_check {
             if ($link_info{'linkprotexit'}) {
                 $linkprotexit = $link_info{'linkprotexit'};
             }
+            if ($link_info{'linkprotpbid'}) {
+                $linkprotpbid = $link_info{'linkprotpbid'};
+            }
+            if ($link_info{'linkprotpburl'}) {
+                $linkprotpburl = $link_info{'linkprotpburl'};
+            }
         } elsif ($link_info{'linkkey'} ne '') {
             $linkkey = $link_info{'linkkey'};
             my $keyedlinkuri = $linkuri;
@@ -339,6 +381,9 @@ sub launch_check {
         if ($link_info{'checklaunch'}) {
             $newlauncher = 1;
         }
+        if ($link_info{'prevlaunch'} ne '') {
+            $prevlaunch = $link_info{'prevlaunch'};
+        }
     }
     my $currdeeplinklogin = $env{'request.deeplink.login'};
     my $deeplink;
@@ -387,26 +432,61 @@ sub launch_check {
                 if ($env{'request.linkprotexit'} ne '') {
                     &Apache::lonnet::delenv('request.linkprotexit');
                 }
+                if ($env{'request.linkprotpbid'} ne '') {
+                    &Apache::lonnet::delenv('request.linkprotpbid');
+                }
+                if ($env{'request.linkprotpburl'} ne '') {
+                    &Apache::lonnet::delenv('request.linkprotpburl');
+                }
             }
         } else {
             unless ($currdeeplinklogin eq $linkuri) {
                 if (($linkprotector) || ($linkkey ne '')) {
-                    if ($linkprotector) {
-                        &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
-                    } elsif ($env{'request.linkprot'}) {
-                        &Apache::lonnet::delenv('request.linkprot');
-                    }
+                    $newlauncher = 1;
+                }
+            }
+            if ($linkprotector) {
+                &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
+                if ($linkprotpburl && $linkprotpbid) {
+                    my ($res,$error) = &store_passback_info($cdom,$cnum,$linkuri,$linkprotector,
+                                                        $scope,$symb,$linkprotpbid,$linkprotpburl,
+                                                        $currdeeplinklogin);
+                }
+            } elsif ($env{'request.linkprot'}) {
+                &Apache::lonnet::delenv('request.linkprot');
+            }
+            if ($linkkey ne '') {
+                &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
+            } elsif ($env{'request.linkkey'} ne '') {
+                &Apache::lonnet::delenv('request.linkkey');
+            }
+            if (($linkprotector) || ($linkkey ne '')) {
+                if ($linkprotexit ne $env{'request.linkprotexit'}) {
                     if ($linkprotexit) {
                         &Apache::lonnet::appenv({'request.linkprotexit' => $linkprotexit});
                     } elsif ($env{'request.linkprotexit'}) {
                         &Apache::lonnet::delenv('request.linkprotexit');
                     }
-                    if ($linkkey ne '') {
-                        &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
-                    } elsif ($env{'request.linkkey'} ne '') {
-                        &Apache::lonnet::delenv('request.linkkey');
+                }
+                if ($linkprotpbid ne $env{'request.linkprotpbid'}) {
+                    if ($linkprotpbid) {
+                        &Apache::lonnet::appenv({'request.linkprotpbid' => $linkprotpbid});
+                    } elsif ($env{'request.linkprotpbid'}) {
+                        &Apache::lonnet::delenv('request.linkprotpbid');
+                    }
+                }
+                if ($linkprotpburl ne $env{'request.linkprotpburl'}) {
+                    if ($linkprotpburl) {
+                        &Apache::lonnet::appenv({'request.linkprotpburl' => $linkprotpburl});
+                    } elsif ($env{'request.linkprotpburl'}) {
+                        &Apache::lonnet::delenv('request.linkprotpburl');
+                    }
+                }
+            } elsif ($prevlaunch) {
+                foreach my $requestkey ('linkprotpbid','linkprotpburl','linkprotexit') {
+                    if ($env{"request.$requestkey"}) {
+                        &Apache::lonnet::delenv("request.$requestkey");
                     }
-                    $newlauncher = 1;
                 }
             }
             &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
@@ -427,6 +507,16 @@ sub launch_check {
         } elsif ($env{'request.linkprotexit'}) {
             &Apache::lonnet::delenv('request.linkprotexit');
         }
+        if ($linkprotpbid) {
+            &Apache::lonnet::appenv({'request.linkprotpbid' => $linkprotpbid});
+        } elsif ($env{'request.linkprotpbid'}) {
+            &Apache::lonnet::delenv('request.linkprotpbid');
+        }
+        if ($linkprotpburl) {
+            &Apache::lonnet::appenv({'request.linkprotpburl' => $linkprotpburl});
+        } elsif ($env{'request.linkprotpburl'}) {
+            &Apache::lonnet::delenv('request.linkprotpburl');
+        }
         if ($linkkey ne '') {
             &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
         } else {
@@ -440,9 +530,74 @@ sub launch_check {
     return $newlauncher;
 }
 
+#
+# Store linkprotpburl and linkprotpbid in user's nohist_$cid_linkprot_pb.db
+# $linkuri\0$linkprotector\0$scope = [$linkprotpbid,$linkprotpburl]
+# Separately store $symb in course's nohist_linkprot_passback.db
+# which should trigger passback:
+# $symb => {$linkuri\0$linkprotector\0$scope => 1};
+#
+
+sub store_passback_info {
+    my ($cdom,$cnum,$linkuri,$linkprotector,$scope,$symb,
+        $linkprotpbid,$linkprotpburl,$currdeeplinklogin) = @_;
+    my $key = join("\0",($linkuri,$linkprotector,$scope));
+    my $namespace = 'nohist_'.$cdom.'_'.$cnum.'_linkprot_pb';
+    if ($linkuri eq $currdeeplinklogin) {
+        my %pbinfo = &Apache::lonnet::get($namespace,[$key]);
+        if (ref($pbinfo{$key}) eq 'ARRAY') {
+            if (($pbinfo{$key}[0] eq $linkprotpbid) &&
+                ($pbinfo{$key}[1] eq $linkprotpburl)) {
+                return ('ok');
+            }
+        }
+    }
+    my $now = time;
+    my $result = &Apache::lonnet::cput($namespace,{$key => [$linkprotpbid,$linkprotpburl]});
+    my $error;
+    if (($result eq 'ok') || ($result eq 'con_delayed')) {
+        $namespace = 'nohist_linkprot_passback';
+        my %triggers = &Apache::lonnet::get($namespace,[$symb],$cdom,$cnum);
+        my $newtrigger;
+        if ((exists($triggers{$symb})) && (ref($triggers{$symb}) eq 'HASH')) {
+            unless (exists($triggers{$symb}{$key})) {
+                $newtrigger = 1;
+            }
+        } else {
+            $newtrigger = 1;
+        }
+        if ($newtrigger) {
+            my ($lockhash,$tries,$gotlock);
+            $lockhash = {
+                          lock => $env{'user.name'}.
+                                  ':'.$env{'user.domain'},
+                        };
+            $tries = 0;
+            $gotlock = &Apache::lonnet::newput($namespace,$lockhash,$cdom,$cnum);
+            while (($gotlock ne 'ok') && ($tries<10)) {
+                $tries ++;
+                sleep (0.1);
+                $gotlock = &Apache::lonnet::newput($namespace,$lockhash,$cdom,$cnum);
+            }
+            if ($gotlock eq 'ok') {
+                %triggers = &Apache::lonnet::get($namespace,[$symb],$cdom,$cnum);
+                $triggers{$symb}{$key} = 1;
+                $result = &Apache::lonnet::cput($namespace,{$symb => $triggers{$symb}},$cdom,$cnum);
+                my $dellockoutcome = &Apache::lonnet::del($namespace,['lock'],$cdom,$cnum);
+            } else {
+                $error = 'nolock';
+            }
+        }
+    }
+    return ($result,$error);
+}
+
 sub do_redirect {
     my ($r,$destination,$linkprot) = @_;
     my $windowname = 'loncapaclient';
+    if ($env{'request.lti.login'}) {
+        $windowname .= 'lti';
+    }
     my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $args = {'bread_crumbs' => [{'href' => '','text' => 'Role initialization'},],};
     if ($linkprot) {
@@ -466,7 +621,8 @@ sub do_redirect {
 }
 
 sub show_roles {
-    my ($r,$crsenv,$possroles,$hassection,$hascustom,$futureroles,$expiredroles,$linkprot,$linkprotuser,$linkprotexit,$ltoken) = @_;
+    my ($r,$crsenv,$possroles,$hassection,$hascustom,$futureroles,$expiredroles,
+        $linkprot,$linkprotuser,$linkprotexit,$linkprotpbid,$linkprotpburl,$ltoken) = @_;
     my ($crsdesc,$crstype,$cdom,$cnum,$header,$title,$preamble,$datatable,$js,$args);
     if (ref($crsenv) eq 'HASH') {
         $crsdesc = $crsenv->{'description'};
@@ -607,6 +763,8 @@ ENDJS
                                 origurl => $r->uri,
                                 linkprot => $linkprot,
                                 linkprotexit => $linkprotexit,
+                                linkprotpbid => $linkprotpbid,
+                                linkprotpburl => $linkprotpburl,
                     );
                     my $token =
                         &Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'retry');
@@ -643,13 +801,15 @@ ENDJS
 sub generic_error {
     my ($r) = @_;
     my $continuelink;
-    my $linktext;
-    if ($env{'user.adv'}) {
-        $linktext = &mt('Continue to your roles page');
-    } else {
-        $linktext = &mt('Continue to your courses page');
+    unless ($env{'request.lti.login'}) {
+        my $linktext;
+        if ($env{'user.adv'}) {
+            $linktext = &mt('Continue to your roles page');
+        } else {
+            $linktext = &mt('Continue to your courses page');
+        }
+        $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
     }
-    $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
     my $msg = &mt('The page you requested does not exist.');
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;