--- loncom/interface/loncommon.pm	2017/12/30 19:51:30	1.1306
+++ loncom/interface/loncommon.pm	2018/03/23 01:01:21	1.1310
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1306 2017/12/30 19:51:30 raeburn Exp $
+# $Id: loncommon.pm,v 1.1310 2018/03/23 01:01:21 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -86,6 +86,8 @@ use MIME::Lite;
 use MIME::Types;
 use File::Copy();
 use File::Path();
+use String::CRC32();
+use Short::URL();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -3025,6 +3027,8 @@ This is not an optimal method, but it wo
 
 =item * authform_filesystem
 
+=item * authform_lti
+
 =back
 
 See loncreateuser.pm for invocation and use examples.
@@ -3441,14 +3445,69 @@ sub authform_filesystem {
                     $fsyscheck.' onchange="'.$jscall.'" onclick="'.
                     $jscall.'"'.$disabled.' />';
     }
-    $autharg = '<input type="text" size="10" name="fsysarg" value=""'.
+    $autharg = '<input type="password" size="10" name="fsysarg" value=""'.
                ' onchange="'.$jscall.'"'.$disabled.' />';
     $result = &mt
         ('[_1] Filesystem Authenticated (with initial password [_2])',
-         '<label><input type="radio" name="login" value="fsys" '.
-         $fsyscheck.'onchange="'.$jscall.'" onclick="'.$jscall.'"'.$disabled.' />',
-         '</label><input type="password" size="10" name="fsysarg" value="" '.
-                  'onchange="'.$jscall.'"'.$disabled.' />');
+         '<label>'.$authtype,'</label>'.$autharg);
+    return $result;
+}
+
+sub authform_lti {
+    my %in = (
+              formname => 'document.cu',
+              kerb_def_dom => 'MSU.EDU',
+              @_,
+              );
+    my ($lticheck,$result,$authtype,$autharg,$jscall,$disabled);
+    my ($authnum,%can_assign) = &get_assignable_auth($in{'domain'});
+    if ($in{'readonly'}) {
+        $disabled = ' disabled="disabled"';
+    }
+    if (defined($in{'curr_authtype'})) {
+        if ($in{'curr_authtype'} eq 'lti') {
+            if ($can_assign{'lti'}) {
+                $lticheck = 'checked="checked" ';
+                if (defined($in{'mode'})) {
+                    if ($in{'mode'} eq 'modifyuser') {
+                        $lticheck = '';
+                    }
+                }
+            } else {
+                $result = &mt('Currently LTI Authenticated.');
+                return $result;
+            }
+        }
+    } else {
+        if ($authnum == 1) {
+            $authtype = '<input type="hidden" name="login" value="lti" />';
+        }
+    }
+    if (!$can_assign{'lti'}) {
+        return;
+    } elsif ($authtype eq '') {
+        if (defined($in{'mode'})) {
+            if ($in{'mode'} eq 'modifycourse') {
+                if ($authnum == 1) {
+                    $authtype = '<input type="radio" name="login" value="lti"'.$disabled.' />';
+                }
+            }
+        }
+    }
+    $jscall = "javascript:changed_radio('lti',$in{'formname'});";
+    if (($authtype eq '') && (($in{'mode'} eq 'modifycourse') || ($in{'curr_authtype'} ne 'lti'))) {
+        $authtype = '<input type="radio" name="login" value="lti" '.
+                    $lticheck.' onchange="'.$jscall.'" onclick="'.
+                    $jscall.'"'.$disabled.' />';
+    }
+    $autharg = '<input type="hidden" name="ltiarg" value="" />';
+    if ($authtype) {
+        $result = &mt('[_1] LTI Authenticated',
+                      '<label>'.$authtype.'</label>'.$autharg);
+    } else {
+        $result = '<b>'.&mt('LTI Authenticated').'</b>'.
+                  $autharg;
+    }
     return $result;
 }
 
@@ -3462,6 +3521,7 @@ sub get_assignable_auth {
                           krb5 => 1,
                           int  => 1,
                           loc  => 1,
+                          lti  => 1,
                      );
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$dom);
     if (ref($domconfig{'usercreation'}) eq 'HASH') {
@@ -16185,13 +16245,14 @@ sub group_term {
 }
 
 sub course_types {
-    my @types = ('official','unofficial','community','textbook','placement');
+    my @types = ('official','unofficial','community','textbook','placement','lti');
     my %typename = (
                          official   => 'Official course',
                          unofficial => 'Unofficial course',
                          community  => 'Community',
                          textbook   => 'Textbook course',
                          placement  => 'Placement test',
+                         lti        => 'LTI provider',
                    );
     return (\@types,\%typename);
 }
@@ -17320,19 +17381,31 @@ sub update_content_constraints {
     my ($cdom,$cnum,$chome,$cid) = @_;
     my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
     my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'});
-    my %checkresponsetypes;
+    my (%checkresponsetypes,%checkcrsrestypes);
     foreach my $key (keys(%Apache::lonnet::needsrelease)) {
         my ($item,$name,$value) = split(/:/,$key);
         if ($item eq 'resourcetag') {
             if ($name eq 'responsetype') {
                 $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
             }
+        } elsif ($item eq 'course') {
+            if ($name eq 'courserestype') {
+                $checkcrsrestypes{$value} = $Apache::lonnet::needsrelease{$key};
+            }
         }
     }
     my $navmap = Apache::lonnavmaps::navmap->new();
     if (defined($navmap)) {
-        my %allresponses;
-        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) {
+        my (%allresponses,%allcrsrestypes);
+        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) {
+            if ($res->is_tool()) {
+                if ($allcrsrestypes{'exttool'}) {
+                    $allcrsrestypes{'exttool'} ++;
+                } else {
+                    $allcrsrestypes{'exttool'} = 1;
+                }
+                next;
+            }
             my %responses = $res->responseTypes();
             foreach my $key (keys(%responses)) {
                 next unless(exists($checkresponsetypes{$key}));
@@ -17345,8 +17418,24 @@ sub update_content_constraints {
                 ($reqdmajor,$reqdminor) = ($major,$minor);
             }
         }
+        foreach my $key (keys(%allcrsrestypes)) {
+            my ($major,$minor) = split(/\./,$checkcrsrestypes{$key});
+            if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+                ($reqdmajor,$reqdminor) = ($major,$minor);
+            }
+        }
         undef($navmap);
     }
+    my $suppmap = 'supplemental.sequence';
+    my ($suppcount,$supptools,$errors) = (0,0,0);
+    ($suppcount,$supptools,$errors) = &recurse_supplemental($cnum,$cdom,$suppmap,
+                                                            $suppcount,$supptools,$errors);
+    if ($supptools) {
+        my ($major,$minor) = split(/\./,$checkcrsrestypes{'exttool'});
+        if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+            ($reqdmajor,$reqdminor) = ($major,$minor);
+        }
+    }
     unless (($reqdmajor eq '') && ($reqdminor eq '')) {
         &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
     }
@@ -17403,7 +17492,7 @@ sub parse_supplemental_title {
 }
 
 sub recurse_supplemental {
-    my ($cnum,$cdom,$suppmap,$numfiles,$errors) = @_;
+    my ($cnum,$cdom,$suppmap,$numfiles,$numexttools,$errors) = @_;
     if ($suppmap) {
         my ($errtext,$fatal) = &LONCAPA::map::mapread('/uploaded/'.$cdom.'/'.$cnum.'/'.$suppmap);
         if ($fatal) {
@@ -17414,8 +17503,12 @@ sub recurse_supplemental {
                     my ($title,$src,$ext,$type,$status)=split(/\:/,$res);
                     if (($src ne '') && ($status eq 'res')) {
                         if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) {
-                            ($numfiles,$errors) = &recurse_supplemental($cnum,$cdom,$1,$numfiles,$errors);
+                            ($numfiles,$numexttools,$errors) = &recurse_supplemental($cnum,$cdom,$1,
+                                                                   $numfiles,$numexttools,$errors);
                         } else {
+                            if ($src =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
+                                $numexttools ++;
+                            }
                             $numfiles ++;
                         }
                     }
@@ -17423,7 +17516,7 @@ sub recurse_supplemental {
             }
         }
     }
-    return ($numfiles,$errors);
+    return ($numfiles,$numexttools,$errors);
 }
 
 sub symb_to_docspath {
@@ -17818,6 +17911,142 @@ sub des_decrypt {
     return $plaintext;
 }
 
+sub make_short_symbs {
+    my ($cdom,$cnum,$navmap) = @_;
+    return unless (ref($navmap));
+    my ($numnew,@errors);
+    my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny');
+    if (@toshorten) {
+        my (%maps,%resources,%titles);
+        &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles,
+                                                               'shorturls',$cdom,$cnum);
+        my %tocreate;
+        if (keys(%resources)) {
+            foreach my $item (sort {$a <=> $b} (@toshorten)) {
+                my $symb = $resources{$item};
+                if ($symb) {
+                    $tocreate{$cnum.'&'.$symb} = 1;
+                }
+            }
+        }
+        if (keys(%tocreate)) {
+            my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum);
+            my $su = Short::URL->new(no_vowels => 1);
+            my $init = '';
+            my (%newunique,%addcourse,%courseonly,%failed);
+            # get lock on tiny db
+            my $now = time;
+            my $lockhash = {
+                                "lock\0$now" => $env{'user.name'}.
+                                                ':'.$env{'user.domain'},
+                            };
+            my $tries = 0;
+            my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
+            my ($code,$error);
+            while (($gotlock ne 'ok') && ($tries<3)) {
+                $tries ++;
+                sleep 1;
+                $gotlock = &Apache::lonnet::newput_dom('uniquecodes',$lockhash,$cdom);
+            }
+            if ($gotlock eq 'ok') {
+                $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique,
+                                       \%addcourse,\%courseonly,\%failed);
+                if (keys(%failed)) {
+                    my $numfailed = scalar(keys(%failed));
+                    push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed));
+                }
+                if (keys(%newunique)) {
+                    my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom);
+                    if ($putres eq 'ok') {
+                        $numnew = scalar(keys(%newunique));
+                        my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum);
+                        unless ($newputres eq 'ok') {
+                            push(@errors,&mt('error: could not store course look-up of short URLs'));
+                        }
+                    } else {
+                        push(@errors,&mt('error: could not store unique six character URLs'));
+                    }
+                }
+                my $dellockres = &Apache::lonnet::del_dom('tiny',["lock\0$now"],$cdom);
+                unless ($dellockres eq 'ok') {
+                    push(@errors,&mt('error: could not release lockfile'));
+                }
+            } else {
+                push(@errors,&mt('error: could not obtain lockfile'));
+            }
+            if (keys(%courseonly)) {
+                my $result = &Apache::lonnet::newput('tiny',\%courseonly,$cdom,$cnum);
+                if ($result ne 'ok') {
+                    push(@errors,&mt('error: could not update course look-up of short URLs'));
+                }
+            }
+        }
+    }
+    return ($numnew,\@errors);
+}
+
+sub shorten_symbs {
+    my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_;
+    return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') &&
+                   (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') &&
+                   (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH'));
+    my (%possibles,%collisions);
+    foreach my $key (keys(%{$tocreate})) {
+        my $num = String::CRC32::crc32($key);
+        my $tiny = $su->encode($num,$init);
+        if ($tiny) {
+            $possibles{$tiny} = $key;
+        }
+    }
+    if (!$init) {
+        $init = 1;
+    } else {
+        $init ++;
+    }
+    if (keys(%possibles)) {
+        my @posstiny = keys(%possibles);
+        my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
+        my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname);
+        if (keys(%currtiny)) {
+            foreach my $key (keys(%currtiny)) {
+                next if ($currtiny{$key} eq '');
+                if ($currtiny{$key} eq $possibles{$key}) {
+                    my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key});
+                    unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+                        $courseonly->{$tsymb} = $key;
+                    }
+                } else {
+                    $collisions{$possibles{$key}} = 1;
+                }
+                delete($possibles{$key});
+            }
+        }
+        foreach my $key (keys(%possibles)) {
+            $newunique->{$key} = $possibles{$key};
+            my ($tcnum,$tsymb) = split(/\&/,$possibles{$key});
+            unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+                $addcourse->{$tsymb} = $key;
+            }
+        }
+    }
+    if (keys(%collisions)) {
+        if ($init <5) {
+            if (!$init) {
+                $init = 1;
+            } else {
+                $init ++;
+            }
+            $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions,
+                                   $newunique,$addcourse,$courseonly,$failed);
+        } else {
+            foreach my $key (keys(%collisions)) {
+                $failed->{$key} = 1;
+            }
+        }
+    }
+    return $init;
+}
+
 1;
 __END__;