--- loncom/interface/loncommon.pm	2017/03/21 23:13:17	1.1277
+++ loncom/interface/loncommon.pm	2017/08/13 23:21:04	1.1293
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1277 2017/03/21 23:13:17 raeburn Exp $
+# $Id: loncommon.pm,v 1.1293 2017/08/13 23:21:04 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -71,6 +71,7 @@ use Apache::lonuserutils();
 use Apache::lonuserstate();
 use Apache::courseclassifier();
 use LONCAPA qw(:DEFAULT :match);
+use LONCAPA::LWPReq;
 use DateTime::TimeZone;
 use DateTime::Locale;
 use Encode();
@@ -83,6 +84,8 @@ use Crypt::DES;
 use DynaLoader; # for Crypt::DES version
 use MIME::Lite;
 use MIME::Types;
+use File::Copy();
+use File::Path::Tiny();
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -2476,10 +2479,24 @@ sub create_text_file {
 # ------------------------------------------
 
 sub domain_select {
-    my ($name,$value,$multiple)=@_;
+    my ($name,$value,$multiple,$incdoms,$excdoms)=@_;
+    my @possdoms;
+    if (ref($incdoms) eq 'ARRAY') {
+        @possdoms = @{$incdoms};
+    } else {
+        @possdoms = &Apache::lonnet::all_domains();
+    }
+
     my %domains=map { 
 	$_ => $_.' '. &Apache::lonnet::domain($_,'description') 
-    } &Apache::lonnet::all_domains();
+    } @possdoms;
+
+    if ((ref($excdoms) eq 'ARRAY') && (@{$excdoms} > 0)) {
+        foreach my $dom (@{$excdoms}) {
+            delete($domains{$dom});
+        }
+    }
+
     if ($multiple) {
 	$domains{''}=&mt('Any domain');
 	$domains{'select_form_order'} = [sort {lc($a) cmp lc($b) } (keys(%domains))];
@@ -4991,7 +5008,8 @@ sub blockcheck {
     # boards, chat or groups, check for blocking in current course only.
 
     if (($activity eq 'boards' || $activity eq 'chat' ||
-         $activity eq 'groups' || $activity eq 'printout') &&
+         $activity eq 'groups' || $activity eq 'printout' ||
+         $activity eq 'reinit' || $activity eq 'alert') &&
         ($env{'request.course.id'})) {
         foreach my $key (keys(%live_courses)) {
             if ($key ne $env{'request.course.id'}) {
@@ -5099,7 +5117,7 @@ sub blockcheck {
 
         # Retrieve blocking times and identity of locker for course
         # of specified user, unless user has 'evb' privilege.
-        
+
         my ($start,$end,$trigger) = 
             &get_blocks($setters,$activity,$cdom,$cnum,$url);
         if (($start != 0) && 
@@ -5186,13 +5204,19 @@ sub get_blocks {
                 my $end = $start + $env{'course.'.$cdom.'_'.$cnum.'.timerinterval.'.$timersymb}; 
                 if ($start && $end) {
                     if (($start <= time) && ($end >= time)) {
-                        unless (grep(/^\Q$block\E$/,@blockers)) {
-                            push(@blockers,$block);
-                            $triggered{$block} = {
-                                                   start => $start,
-                                                   end   => $end,
-                                                   type  => $type,
-                                                 };
+                        if (ref($commblocks{$block}) eq 'HASH') {
+                            if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
+                                if ($commblocks{$block}{'blocks'}{$activity} eq 'on') {
+                                    unless(grep(/^\Q$block\E$/,@blockers)) {
+                                        push(@blockers,$block);
+                                        $triggered{$block} = {
+                                                               start => $start,
+                                                               end   => $end,
+                                                               type  => $type,
+                                                             };
+                                    }
+                                }
+                            }
                         }
                     }
                 }
@@ -5302,6 +5326,10 @@ END_MYBLOCK
         $text = &mt('Printing Blocked');
     } elsif ($activity eq 'passwd') {
         $text = &mt('Password Changing Blocked');
+    } elsif ($activity eq 'alert') {
+        $text = &mt('Checking Critical Messages Blocked');
+    } elsif ($activity eq 'reinit') {
+        $text = &mt('Checking Course Update Blocked');
     }
     $output .= <<"END_BLOCK";
 <div class='$class'>
@@ -6440,6 +6468,11 @@ td.LC_menubuttons_text {
   background: $tabbg;
 }
 
+td.LC_zero_height {
+  line-height: 0; 
+  cellpadding: 0;
+}
+
 table.LC_data_table {
   border: 1px solid #000000;
   border-collapse: separate;
@@ -6761,6 +6794,12 @@ td.LC_parm_overview_restrictions  {
   border-collapse: collapse;
 }
 
+span.LC_parm_recursive,
+td.LC_parm_recursive {
+  font-weight: bold;
+  font-size: smaller;
+}
+
 table.LC_parm_overview_restrictions td {
   border-width: 1px 4px 1px 4px;
   border-style: solid;
@@ -7112,6 +7151,12 @@ table.LC_data_table tr > td.LC_docs_entr
   color: #990000;
 }
 
+.LC_docs_alias {
+  color: #440055;  
+}
+
+.LC_domprefs_email,
+.LC_docs_alias_name,
 .LC_docs_reinit_warn,
 .LC_docs_ext_edit {
   font-size: x-small;
@@ -8357,6 +8402,7 @@ OFFLOAD
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
 <meta name="apple-mobile-web-app-capable" content="yes" />';
     }
+    $result .= '<meta name="google" content="notranslate" />'."\n";
     return $result.'</head>';
 }
 
@@ -10037,7 +10083,7 @@ sub get_secgrprole_info {
 }
 
 sub user_picker {
-    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom) = @_;
+    my ($dom,$srch,$forcenewuser,$caller,$cancreate,$usertype,$context,$fixeddom,$noinstd) = @_;
     my $currdom = $dom;
     my @alldoms = &Apache::lonnet::all_domains();
     if (@alldoms == 1) {
@@ -10107,7 +10153,16 @@ sub user_picker {
         $allow_blank = 0;
         $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,[$currdom]);
     } else {
-        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1);
+        my $defdom = $env{'request.role.domain'};
+        my ($trusted,$untrusted);
+        if (($context eq 'requestcrs') || ($context eq 'course')) {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('enroll',$defdom);
+        } elsif ($context eq 'author') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('othcoau',$defdom);
+        } elsif ($context eq 'domain') {
+            ($trusted,$untrusted) = &Apache::lonnet::trusted_domains('domroles',$defdom);
+        }
+        $domform = &select_dom_form($currdom,'srchdomain',$allow_blank,1,undef,$trusted,$untrusted);
     }
     my $srchinsel = ' <select name="srchin">';
 
@@ -10120,6 +10175,7 @@ sub user_picker {
         next if ($option eq 'alc');
         next if (($option eq 'crs') && ($env{'form.form'} eq 'requestcrs'));  
         next if ($option eq 'crs' && !$env{'request.course.id'});
+        next if (($option eq 'instd') && ($noinstd));
         if ($curr_selected{'srchin'} eq $option) {
             $srchinsel .= ' 
    <option value="'.$option.'" selected="selected">'.$html_lt{$option}.'</option>';
@@ -12540,6 +12596,18 @@ sub decompress_uploaded_file {
 
 sub process_decompression {
     my ($docudom,$docuname,$file,$destination,$dir_root,$hiddenelem) = @_;
+    unless (($dir_root eq '/userfiles') && ($destination =~ m{^(docs|supplemental)/(default|\d+)/\d+$})) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected file path.').'</p>'."\n";
+    }
+    unless (($docudom =~ /^$match_domain$/) && ($docuname =~ /^$match_courseid$/)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Unexpected course context.').'</p>'."\n";
+    }
+    unless ($file eq &Apache::lonnet::clean_filename($file)) {
+        return '<p class="LC_error">'.&mt('Not extracted.').'<br />'.
+               &mt('Filename contained unexpected characters.').'</p>'."\n";
+    }
     my ($dir,$error,$warning,$output);
     if ($file !~ /\.(zip|tar|bz2|gz|tar.gz|tar.bz2|tgz)$/i) {
         $error = &mt('Filename not a supported archive file type.').
@@ -12574,30 +12642,44 @@ sub process_decompression {
                 }
             }
             my $numskip = scalar(@to_skip);
-            if (($numskip > 0) && 
-                ($numskip == $env{'form.archive_itemcount'})) {
+            my $numoverwrite = scalar(@to_overwrite);
+            if (($numskip) && (!$numoverwrite)) { 
                 $warning = &mt('All items in the archive file already exist, and no overwriting of existing files has been requested.');         
             } elsif ($dir eq '') {
                 $error = &mt('Directory containing archive file unavailable.');
             } elsif (!$error) {
                 my ($decompressed,$display);
-                if ($numskip > 0) {
+                if (($numskip) || ($numoverwrite)) {
                     my $tempdir = time.'_'.$$.int(rand(10000));
                     mkdir("$dir/$tempdir",0755);
-                    system("mv $dir/$file $dir/$tempdir/$file");
-                    ($decompressed,$display) = 
-                        &decompress_uploaded_file($file,"$dir/$tempdir");
-                    foreach my $item (@to_skip) {
-                        if (($item ne '') && ($item !~ /\.\./)) {
-                            if (-f "$dir/$tempdir/$item") { 
-                                unlink("$dir/$tempdir/$item");
-                            } elsif (-d "$dir/$tempdir/$item") {
-                                system("rm -rf $dir/$tempdir/$item");
+                    if (&File::Copy::move("$dir/$file","$dir/$tempdir/$file")) {
+                        ($decompressed,$display) = 
+                            &decompress_uploaded_file($file,"$dir/$tempdir");
+                        foreach my $item (@to_skip) {
+                            if (($item ne '') && ($item !~ /\.\./)) {
+                                if (-f "$dir/$tempdir/$item") { 
+                                    unlink("$dir/$tempdir/$item");
+                                } elsif (-d "$dir/$tempdir/$item") {
+                                    &File::Path::Tiny::rm("$dir/$tempdir/$item");
+                                }
                             }
                         }
+                        foreach my $item (@to_overwrite) {
+                            if ((-e "$dir/$tempdir/$item") && (-e "$dir/$item")) {
+                                if (($item ne '') && ($item !~ /\.\./)) {
+                                    if (-f "$dir/$item") {
+                                        unlink("$dir/$item");
+                                    } elsif (-d "$dir/$item") {
+                                        &File::Path::Tiny::rm("$dir/$item");
+                                    }
+                                    &File::Copy::move("$dir/$tempdir/$item","$dir/$item");
+                                }
+                            }
+                        }
+                        if (&File::Copy::move("$dir/$tempdir/$file","$dir/$file")) {
+                            &File::Path::Tiny::rm("$dir/$tempdir");
+                        }
                     }
-                    system("mv $dir/$tempdir/* $dir");
-                    rmdir("$dir/$tempdir");   
                 } else {
                     ($decompressed,$display) = 
                         &decompress_uploaded_file($file,$dir);
@@ -12615,8 +12697,7 @@ sub process_decompression {
                     if (ref($newdirlistref) eq 'ARRAY') {
                         foreach my $dir_line (@{$newdirlistref}) {
                             my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,5);
-                            unless (($item =~ /^\.+$/) || ($item eq $file) || 
-                                    ((@to_skip > 0) && (grep(/^\Q$item\E$/,@to_skip)))) {
+                            unless (($item =~ /^\.+$/) || ($item eq $file)) {
                                 push(@newitems,$item);
                                 if ($dirptr&$testdir) {
                                     $is_dir{$item} = 1;
@@ -13219,12 +13300,13 @@ sub process_extracted_files {
                                 mkdir("$prefix$dir/$docstype/$mapinner{$outer}/$newidx");
                             }
                             if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
-                                system("mv $prefix$path $prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title");
-                                $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
-                                unless ($ishome) {
-                                    my $fetch = "$newdest{$i}/$title";
-                                    $fetch =~ s/^\Q$prefix$dir\E//;
-                                    $prompttofetch{$fetch} = 1;
+                                if (rename("$prefix$path","$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title")) {
+                                    $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
+                                    unless ($ishome) {
+                                        my $fetch = "$newdest{$i}/$title";
+                                        $fetch =~ s/^\Q$prefix$dir\E//;
+                                        $prompttofetch{$fetch} = 1;
+                                    }
                                 }
                             }
                             $LONCAPA::map::resources[$newidx]=
@@ -13304,7 +13386,9 @@ sub process_extracted_files {
                         }
                         if ($fullpath ne '') {
                             if (-e "$prefix$path") {
-                                system("mv $prefix$path $fullpath/$title");
+                                unless (rename("$prefix$path","$fullpath/$title")) {
+                                     $warning .= &mt('Failed to rename dependency').'<br />';
+                                }
                             }
                             if (-e "$fullpath/$title") {
                                 my $showpath;
@@ -13314,11 +13398,11 @@ sub process_extracted_files {
                                     $showpath = "/$title";
                                 } 
                                 $result .= '<li>'.&mt('[_1] included as a dependency',$showpath).'</li>'."\n";
-                            } 
-                            unless ($ishome) {
-                                my $fetch = "$fullpath/$title";
-                                $fetch =~ s/^\Q$prefix$dir\E//; 
-                                $prompttofetch{$fetch} = 1;
+                                unless ($ishome) {
+                                    my $fetch = "$fullpath/$title";
+                                    $fetch =~ s/^\Q$prefix$dir\E//; 
+                                    $prompttofetch{$fetch} = 1;
+                                }
                             }
                         }
                     }
@@ -13616,20 +13700,21 @@ sub upfile_store {
 
 =pod
 
-=item * &load_tmp_file($r)
+=item * &load_tmp_file($r,$datatoken)
 
 Load uploaded file from tmp, $r should be the HTTP Request object,
-needs $env{'form.datatoken'},
+$datatoken is the name to assign to the temporary file.
 sets $env{'form.upfile'} to the contents of the file
 
 =cut
 
 sub load_tmp_file {
-    my $r=shift;
+    my ($r,$datatoken) = @_;
+    return if ($datatoken eq '');
     my @studentdata=();
     {
         my $studentfile = $r->dir_config('lonDaemons').
-                              '/tmp/'.$env{'form.datatoken'}.'.tmp';
+                              '/tmp/'.$datatoken.'.tmp';
         if ( open(my $fh,"<$studentfile") ) {
             @studentdata=<$fh>;
             close($fh);
@@ -13638,6 +13723,14 @@ sub load_tmp_file {
     $env{'form.upfile'}=join('',@studentdata);
 }
 
+sub valid_datatoken {
+    my ($datatoken) = @_;
+    if ($datatoken =~ /^$match_username\_$match_domain\_enroll_$match_domain\_$match_courseid\_\d+_\d+$/) {
+        return $datatoken;
+    }
+    return;
+}
+
 =pod
 
 =item * &upfile_record_sep()
@@ -16170,8 +16263,36 @@ sub init_user_environment {
                                                       $reqauthor{'author'}{'timestamp'};
                 }
             }
+            my ($types,$typename) = &course_types();
+            if (ref($types) eq 'ARRAY') {
+                my @options = ('approval','validate','autolimit');
+                my $optregex = join('|',@options);
+                my (%willtrust,%trustchecked);
+                foreach my $type (@{$types}) {
+                    my $dom_str = $env{'environment.reqcrsotherdom.'.$type};
+                    if ($dom_str ne '') {
+                        my $updatedstr = '';
+                        my @possdomains = split(',',$dom_str);
+                        foreach my $entry (@possdomains) {
+                            my ($extdom,$extopt) = split(':',$entry);
+                            unless ($trustchecked{$extdom}) {
+                                $willtrust{$extdom} = &Apache::lonnet::will_trust('reqcrs',$domain,$extdom);
+                                $trustchecked{$extdom} = 1;
+                            }
+                            if ($willtrust{$extdom}) {
+                                $updatedstr .= $entry.',';
+                            }
+                        }
+                        $updatedstr =~ s/,$//;
+                        if ($updatedstr) {
+                            $userenv{'reqcrsotherdom.'.$type} = $updatedstr;
+                        } else {
+                            delete($userenv{'reqcrsotherdom.'.$type});
+                        }
+                    }
+                }
+            }
         }
-
 	$env{'user.environment'} = "$lonids/$cookie.id";
 
 	if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id",
@@ -16984,8 +17105,12 @@ sub needs_coursereinit {
         $interval = 600;
     }
     if (($now-$env{'request.course.timechecked'})>$interval) {
-        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
+        my $blocked = &blocking_status('reinit',$cnum,$cdom,undef,1);
+        if ($blocked) {
+            return ();
+        }
+        my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
         if ($lastchange > $env{'request.course.tied'}) {
             my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
             if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
@@ -17350,14 +17475,19 @@ sub check_recaptcha {
     my ($privkey,$version) = @_;
     my $captcha_chk;
     if ($version >= 2) {
-        my $ua = LWP::UserAgent->new;
-        $ua->timeout(10);
         my %info = (
                      secret   => $privkey, 
                      response => $env{'form.g-recaptcha-response'},
                      remoteip => $ENV{'REMOTE_ADDR'},
                    );
-        my $response = $ua->post('https://www.google.com/recaptcha/api/siteverify',\%info);
+        my $request=new HTTP::Request('POST','https://www.google.com/recaptcha/api/siteverify');
+        $request->content(join('&',map {
+                         my $name = escape($_);
+                         "$name=" . ( ref($info{$_}) eq 'ARRAY'
+                         ? join("&$name=", map {escape($_) } @{$info{$_}})
+                         : &escape($info{$_}) );
+        } keys(%info)));
+        my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',10,1);
         if ($response->is_success)  {
             my $data = JSON::DWIW->from_json($response->decoded_content);
             if (ref($data) eq 'HASH') {
@@ -17420,9 +17550,25 @@ sub cleanup_html {
 
 # Checks for critical messages and returns a redirect url if one exists.
 # $interval indicates how often to check for messages.
+# $context is the calling context -- roles, grades, contents, menu or flip. 
 sub critical_redirect {
-    my ($interval) = @_;
+    my ($interval,$context) = @_;
     if ((time-$env{'user.criticalcheck.time'})>$interval) {
+        if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            my $blocked = &blocking_status('alert',$cnum,$cdom,undef,1);
+            if ($blocked) {
+                my $checkrole = "cm./$cdom/$cnum";
+                if ($env{'request.course.sec'} ne '') {
+                    $checkrole .= "/$env{'request.course.sec'}";
+                }
+                unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+                        ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
+                    return;
+                }
+            }
+        }
         my @what=&Apache::lonnet::dump('critical', $env{'user.domain'}, 
                                         $env{'user.name'});
         &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});