--- loncom/interface/lonmsgdisplay.pm	2006/04/25 20:02:30	1.14
+++ loncom/interface/lonmsgdisplay.pm	2006/06/29 13:52:19	1.35
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Routines for messaging display
 #
-# $Id: lonmsgdisplay.pm,v 1.14 2006/04/25 20:02:30 albertel Exp $
+# $Id: lonmsgdisplay.pm,v 1.35 2006/06/29 13:52:19 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -125,6 +125,9 @@ use Apache::lonlocal;
 use Apache::loncommunicate;
 use Apache::lonfeedback;
 use Apache::lonrss();
+use Apache::lonselstudent();
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
 
 # Querystring component with sorting type
 my $sqs;
@@ -214,7 +217,7 @@ sub movemsg {
 # Copy message
     my %message=&Apache::lonnet::get('nohist_email'.$srcsuffix,[$msgid]);
     if (!exists($message{$msgid}) || $message{$msgid} eq '') {
-	if (&Apache::slotrequest::network_error(%message)) {
+	if (&Apache::lonnet::error(%message)) {
 	    return (0,&mt('Message not moved, A network error occurred.'));
 	} else {
 	    return (0,&mt('Message not moved as the message is no longer in the source folder.'));
@@ -223,7 +226,7 @@ sub movemsg {
 
     my $result =&Apache::lonnet::put('nohist_email'.$trgsuffix,
 				     {$msgid => $message{$msgid}});
-    if (&Apache::slotrequest::network_error($result)) {
+    if (&Apache::lonnet::error($result)) {
 	return (0,&mt('Message not moved, A network error occurred.'));
     }
 
@@ -231,12 +234,12 @@ sub movemsg {
     unless ($trgfolder eq 'trash') {
        	my %status=&Apache::lonnet::get('email_status'.$srcsuffix,[$msgid]);
 	# a non-existant status is the mark of an unread msg
-	if (&Apache::slotrequest::network_error(%status)) {
+	if (&Apache::lonnet::error(%status)) {
 	    return (0,&mt('Message copied to new folder but status was not, A network error occurred.'));
 	}
 	my $result=&Apache::lonnet::put('email_status'.$trgsuffix,
 					{$msgid => $status{$msgid}});
-	if (&Apache::slotrequest::network_error($result)) {
+	if (&Apache::lonnet::error($result)) {
 	    return (0,&mt('Message copied to new folder but status was not, A network error occurred.'));
 	}
     }
@@ -246,10 +249,10 @@ sub movemsg {
 	&Apache::lonnet::del('nohist_email'.$srcsuffix,[$msgid]);
     my $result_del_stat =
 	&Apache::lonnet::del('email_status'.$srcsuffix,[$msgid]);
-    if (&Apache::slotrequest::network_error($result_del_msg)) {
+    if (&Apache::lonnet::error($result_del_msg)) {
 	return (0,&mt('Message copied, but unable to delete the original from the source folder.'));
     }
-    if (&Apache::slotrequest::network_error($result_del_stat)) {
+    if (&Apache::lonnet::error($result_del_stat)) {
 	return (0,&mt('Message copied, but unable to delete the original status from the source folder.'));
     }
 
@@ -259,89 +262,32 @@ sub movemsg {
 # ======================================================= Display a course list
 
 sub discourse {
-    my $r=shift;
-    my $classlist = &Apache::loncoursedata::get_classlist();
-    my $now=time;
-    my %lt=&Apache::lonlocal::texthash('cfa' => 'Check All',
-            'cfs' => 'Check Section/Group',
-            'cfn' => 'Uncheck All');
-    $r->print(<<ENDDISHEADER);
-<input type="hidden" name="sendmode" value="group" />
-<script>
-    function checkall() {
-	for (i=0; i<document.forms.compemail.elements.length; i++) {
-            if 
-          (document.forms.compemail.elements[i].name.indexOf('send_to_')==0) {
-	      document.forms.compemail.elements[i].checked=true;
-            }
-        }
-    }
-
-    function checksec() {
-	for (i=0; i<document.forms.compemail.elements.length; i++) {
-            if 
-          (document.forms.compemail.elements[i].name.indexOf
-           ('send_to_&&&'+document.forms.compemail.chksec.value+'&&&')==0) {
-	      document.forms.compemail.elements[i].checked=true;
-            }
-        }
-    }
-
-    function uncheckall() {
-	for (i=0; i<document.forms.compemail.elements.length; i++) {
-            if 
-          (document.forms.compemail.elements[i].name.indexOf('send_to_')==0) {
-	      document.forms.compemail.elements[i].checked=false;
-            }
-        }
-    }
-</script>
-<input type="button" onClick="checkall()" value="$lt{'cfa'}" />&nbsp;
-<input type="button" onClick="checksec()" value="$lt{'cfs'}" />
-<input type="text" size="5" name="chksec" />&nbsp;
-<input type="button" onClick="uncheckall()" value="$lt{'cfn'}" />
-<p>
-ENDDISHEADER
-    my %coursepersonnel=&Apache::lonnet::get_course_adv_roles();
-    $r->print('<table>');
-    foreach my $role (sort keys %coursepersonnel) {
-        foreach (split(/\,/,$coursepersonnel{$role})) {
-            my ($puname,$pudom)=split(/\:/,$_);
-            $r->print('<tr><td><label>'.
-                      '<input type="checkbox" name="send_to_&&&&&&_'.
-                      $puname.':'.$pudom.'" /> '.
-                      &Apache::loncommon::plainname($puname,$pudom).
-                      '</label></td>'.
-                      '<td>('.$_.'),</td><td><i>'.$role.'</i></td></tr>');
-        }
-    }
-    $r->print('</table><table>');
-    my $sort = sub {
-	my $aname=lc($classlist->{$a}[&Apache::loncoursedata::CL_FULLNAME()]);
-	if (!$aname) { $aname=$a; }
-	my $bname=lc($classlist->{$b}[&Apache::loncoursedata::CL_FULLNAME()]);
-	if (!$bname) { $bname=$b; }
-	return $aname cmp $bname;
-    };
-    foreach my $student (sort $sort (keys(%{$classlist}))) {
-	my $info=$classlist->{$student};
-        my ($sname,$sdom,$status,$fullname,$section) =
-            (@{$info}[&Apache::loncoursedata::CL_SNAME(),
-                      &Apache::loncoursedata::CL_SDOM(),
-                      &Apache::loncoursedata::CL_STATUS(),
-                      &Apache::loncoursedata::CL_FULLNAME(),
-                      &Apache::loncoursedata::CL_SECTION()]);
-        next if ($status ne 'Active');
-	next if ($env{'request.course.sec'} &&
-		 $section ne $env{'request.course.sec'});
-        my $key = 'send_to_&&&'.$section.'&&&_'.$student;
-        if (! defined($fullname) || $fullname eq '') { $fullname = $sname; }
-        $r->print('<tr><td><label>'.
-                  qq{<input type="checkbox" name="$key" />}.('&nbsp;'x2).
-                  $fullname.'</label></td><td>'.$sname.':'.$sdom.'</td><td>'.$section.
-                  '</td></tr>');
-    }
-    $r->print('</table>');
+    my $result;
+    my ($course_personnel,
+	$current_members,
+	$expired_members,
+	$future_members) = 
+	    &Apache::lonselstudent::get_people_in_class($env{'request.course.sec'});
+    unshift @$current_members, (@$course_personnel);
+    my %defaultUsers;
+
+    $result = &Apache::lonselstudent::render_student_list($current_members,
+							  "compemail",
+							  "current",
+							  \%defaultUsers,
+							  1,"selectedusers",1);
+
+    $result .= &Apache::lonselstudent::render_student_list($expired_members,
+							   "compemail",
+							   "expired",
+							   \%defaultUsers,
+							   1, "selectedusers",0);
+    $result .= &Apache::lonselstudent::render_student_list($future_members,
+							   "compemail",
+							   "future",
+							   \%defaultUsers,
+							   1, "selectedusers", 0);
+    return $result;
 }
 
 # ==================================================== Display Critical Message
@@ -374,7 +320,7 @@ $content{'sendername'}.':'.
     # Check to see if there were any messages.
     if ($result eq '') {
         $result = "<h2>".&mt('You have no critical messages.')."</h2>".
-	    '<a href="/adm/roles">'.&mt('Select a course').'</a><br />'.
+	    '<a href="/adm/roles">'.&mt('Select a course or group').'</a><br />'.
             '<a href="/adm/email">'.&mt('Communicate').'</a>';
     } else {
         $r->print($header);
@@ -400,7 +346,7 @@ sub sortedmessages {
     }
 
     foreach my $msgid (@messages) {
-	my $esc_msgid=&Apache::lonnet::escape($msgid);
+	my $esc_msgid=&escape($msgid);
 	my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid)=
 	    &Apache::lonmsg::unpackmsgid($esc_msgid,$folder,undef,
 					 \%status_cache);
@@ -507,7 +453,7 @@ sub disnew {
     my %lt=&Apache::lonlocal::texthash(
 				       'nm' => 'New Messages',
 				       'su' => 'Subject',
-                                       'co' => 'Course',
+                                       'co' => 'Course/Group',
 				       'da' => 'Date',
 				       'us' => 'Username',
 				       'op' => 'Open',
@@ -526,7 +472,7 @@ sub disnew {
 	&Apache::lonnet::get('email_status',\@msgids);
     my %descriptions;
     foreach (@msgids) {
-	my $msgid=&Apache::lonnet::escape($_);
+	my $msgid=&escape($_);
         my ($sendtime,$shortsubj,$fromname,$fromdom,$status,$fromcid)=
 	    &Apache::lonmsg::unpackmsgid($msgid,undef,undef,\%status_cache);
         if (defined($sendtime) && $sendtime!~/error/) {
@@ -612,7 +558,7 @@ sub disfolder {
     my $numblocked = 0;
     &blockcheck(\%setters,\$startblock,\$endblock);
     $r->print(<<ENDDISHEADER);
-<script>
+<script type="text/javascript">
     function checkall() {
 	for (i=0; i<document.forms.disall.elements.length; i++) {
             if 
@@ -625,7 +571,7 @@ sub disfolder {
     function uncheckall() {
 	for (i=0; i<document.forms.disall.elements.length; i++) {
             if 
-          (document.forms.disall.elements[i].name.indexOf('delmark_')==0) {
+          (document.forms.disall.elements[i].name.indexof('delmark_')==0) {
 	      document.forms.disall.elements[i].checked=false;
             }
         }
@@ -676,9 +622,9 @@ ENDDISHEADER
     }
     $r->print('</th><th>');
     if ($env{'form.sortedby'} eq "revcourse") {
-        $r->print('<a href = "?sortedby=course'.$fsqs.'">'.&mt('Course').'</a>');
+        $r->print('<a href = "?sortedby=course'.$fsqs.'">'.&mt('Course/Group').'</a>');
     } else {
-        $r->print('<a href = "?sortedby=revcourse'.$fsqs.'">'.&mt('Course').'</a>');
+        $r->print('<a href = "?sortedby=revcourse'.$fsqs.'">'.&mt('Course/Group').'</a>');
     }
     $r->print('</th><th>');
     if ($env{'form.sortedby'} eq "revstatus") {
@@ -709,7 +655,7 @@ ENDDISHEADER
 		    $dis_name   = join('<br />',@{$recv_name});
 		    $dis_domain = join('<br />',@{$recv_domain});
 		} else {
-		    my $msg_id  = &Apache::lonnet::unescape($origID);
+		    my $msg_id  = &unescape($origID);
 		    my %message = &Apache::lonnet::get('nohist_email'.$suffix,
 						       [$msg_id]);
 		    my %content = &Apache::lonmsg::unpackagemsg($message{$msg_id});
@@ -728,7 +674,7 @@ ENDDISHEADER
 	} elsif ($status eq 'deleted') {
 # purge
 	    my ($result,$msg) = 
-		&movemsg(&Apache::lonnet::unescape($origID),$folder,'trash');
+		&movemsg(&unescape($origID),$folder,'trash');
 	    
 	}
     }   
@@ -772,15 +718,15 @@ sub compout {
 	     'Broadcast Message');
     } elsif ($forwarding) {
 	&Apache::lonhtmlcommon::add_breadcrumb
-        ({href=>"/adm/email?display=".&Apache::lonnet::escape($forwarding),
+        ({href=>"/adm/email?display=".&escape($forwarding),
           text=>"Display Message"});
-	&printheader($r,'/adm/email?forward='.&Apache::lonnet::escape($forwarding),
+	&printheader($r,'/adm/email?forward='.&escape($forwarding),
 	     'Forwarding a Message');
     } elsif ($replying) {
 	&Apache::lonhtmlcommon::add_breadcrumb
-        ({href=>"/adm/email?display=".&Apache::lonnet::escape($replying),
+        ({href=>"/adm/email?display=".&escape($replying),
           text=>"Display Message"});
-	&printheader($r,'/adm/email?replyto='.&Apache::lonnet::escape($replying),
+	&printheader($r,'/adm/email?replyto='.&escape($replying),
 	     'Replying to a Message');
     } elsif ($replycrit) {
 	$r->print('<h3>'.&mt('Replying to a Critical Message').'</h3>');
@@ -830,7 +776,7 @@ sub compout {
 	$dismsg=&mt('Forwarded message from').' '.
 	    $content{'sendername'}.' '.&mt('at').' '.$content{'senderdomain'};
 	if ($content{'baseurl'}) {
-	    $disbase='<input type="hidden" name="baseurl" value="'.&Apache::lonnet::escape($content{'baseurl'}).'" />';
+	    $disbase='<input type="hidden" name="baseurl" value="'.&escape($content{'baseurl'}).'" />';
 	}
     }
     if ($replying) {
@@ -846,18 +792,20 @@ sub compout {
 	$dismsg=~s/\f/\n/g;
 	$dismsg=~s/\n+/\n\> /g;
 	if ($content{'baseurl'}) {
-	    $disbase='<input type="hidden" name="baseurl" value="'.&Apache::lonnet::escape($content{'baseurl'}).'" />';
+	    $disbase='<input type="hidden" name="baseurl" value="'.&escape($content{'baseurl'}).'" />';
 	    if ($env{'user.adv'}) {
 		$disbase.='<label><input type="checkbox" name="storebasecomment" />'.&mt('Store message for re-use').
 		    '</label> <a href="/adm/email?showcommentbaseurl='.
-		    &Apache::lonnet::escape($content{'baseurl'}).'" target="comments">'.
+		    &escape($content{'baseurl'}).'" target="comments">'.
 		    &mt('Show re-usable messages').'</a><br />';
 	    }
 	}
     }
     my $citation=&displayresource(%content);
     if ($env{'form.recdom'}) { $defdom=$env{'form.recdom'}; }
-      $r->print(
+    if ($env{'form.text'}) { $dismsg=$env{'form.text'}; }
+    if ($env{'form.subject'}) { $dissub=$env{'form.subject'}; }
+    $r->print(
                 '<form action="/adm/email"  name="compemail" method="post"'.
                 ' enctype="multipart/form-data">'."\n".
                 '<input type="hidden" name="sendmail" value="on" />'."\n".
@@ -932,6 +880,8 @@ ENDUPLOAD
     }
     if ($broadcast eq 'group') {
        &discourse($r);
+       my $studentsel = &discourse();
+       $r->print($studentsel);
     }
     $r->print('</form>'.
 	      &Apache::lonfeedback::generate_preview_button('compemail','message').
@@ -992,7 +942,7 @@ sub disfacetoface {
             $result .='<h3>'.&mt('Broadcast Message').'</h3>';
             if ($content{'subject'}=~/^Broadcast\./) {
                 if (defined($content{'coursemsgid'})) {
-                    my $crsmsgid = &Apache::lonnet::escape($content{'coursemsgid'});
+                    my $crsmsgid = &escape($content{'coursemsgid'});
                     my $broadcast_message = &general_message($crsmsgid);
                     $content{'message'} = '<b>'.&mt('Subject').': '.$content{'message'}.'</b><br />'.$broadcast_message;
                 } else {
@@ -1005,7 +955,7 @@ sub disfacetoface {
         } else {
             $result.='<h3>'.&mt('Critical Message').'</h3>';
             if (defined($content{'coursemsgid'})) {
-                my $crsmsgid=&Apache::lonnet::escape($content{'coursemsgid'});
+                my $crsmsgid=&escape($content{'coursemsgid'});
                 my $critical_message = &general_message($crsmsgid);
                 $content{'message'} = '<b>'.&mt('Subject').': '.$content{'message'}.'</b><br />'.$critical_message;
             } else {
@@ -1026,10 +976,11 @@ $content{'sendername'}.':'.
      }
     # Check to see if there were any messages.
     if ($result eq '') {
+        my $lctype = lc(&Apache::loncommon::course_type());
 	if ($target ne 'tex') { 
-	    $r->print("<p><b>".&mt("No notes, face-to-face discussion records, critical messages, or broadcast messages in this course.")."</b></p>");
+	    $r->print("<p><b>".&mt('No notes, face-to-face discussion records, critical messages, or broadcast messages in this [_1].',$lctype)."</b></p>");
 	} else {
-	    $r->print('\textbf{'.&mt("No notes, face-to-face discussion records, critical messages or broadcast messages in this course.").'}\\\\');
+	    $r->print('\textbf{'.&mt('No notes, face-to-face discussion records, critical messages or broadcast messages in this [_1].',$lctype).'}\\\\');
 	}
     } else {
        $r->print($result);
@@ -1058,6 +1009,9 @@ sub facetoface {
 	$r->print('Not allowed');
 	return;
     }
+    my $crstype = &Apache::loncommon::course_type();
+    my $leaders = ($crstype eq 'Group') ? 'coordinators and leaders'
+                                        : 'faculty and staff';
     &printheader($r,
 		 '/adm/email?recordftf=query',
 		 "User Notes, Face-to-Face, Critical Messages, Broadcast Messages");
@@ -1075,9 +1029,9 @@ sub facetoface {
 	('stdselect','recuname','recdomain');
     my %lt=&Apache::lonlocal::texthash('user' => 'Username',
 				       'dom' => 'Domain',
-				       'head' => 'User Notes, Records of Face-To-Face Discussions, Critical Messages, and Broadcast Messages in Course',
+				       'head' => "User Notes, Records of Face-To-Face Discussions, Critical Messages, and Broadcast Messages in $crstype",
 				       'subm' => 'Retrieve discussion and message records',
-				       'newr' => 'New Record (record is visible to course faculty and staff)',
+				       'newr' => 'New Record (record is visible to '.lc($crstype).' '.$leaders.')',
 				       'post' => 'Post this Record');
     $r->print(<<"ENDTREC");
 <h3>$lt{'head'}</h3>
@@ -1098,13 +1052,9 @@ ENDTREC
         ($env{'form.recdomain'}) && ($env{'form.recuname'})) {
         chomp($env{'form.newrecord'});
         if ($env{'form.newrecord'}) {
-           my $recordtxt = $env{'form.newrecord'};
-           &Apache::lonmsg::user_normal_msg_raw(
-            $env{'course.'.$env{'request.course.id'}.'.num'},
-            $env{'course.'.$env{'request.course.id'}.'.domain'},
-            &mt('Record').
-	     ' ['.$env{'form.recuname'}.':'.$env{'form.recdomain'}.']',
-	    $recordtxt);
+	    &Apache::lonmsg::store_instructor_comment($env{'form.newrecord'},
+						      $env{'form.recuname'},
+						      $env{'form.recdomain'});
         }
         $r->print('<h3>'.&Apache::loncommon::plainname($env{'form.recuname'},
 				     $env{'form.recdomain'}).'</h3>');
@@ -1136,10 +1086,12 @@ sub examblock {
 	$r->print('Not allowed');
 	return;
     }
+    my $usertype = (&Apache::loncommon::course_type() eq 'Group') ? 'members'
+	                                                          : 'students';
     my %lt=&Apache::lonlocal::texthash(
             'comb' => 'Communication Blocking',
             'cbds' => 'Communication blocking during scheduled exams',
-            'desc' => 'You can use communication blocking to prevent students enrolled in this course from displaying LON-CAPA messages sent by other students during an online exam. As blocking of communication could potentially interrupt legitimate communication between students who are also both enrolled in a different LON-CAPA course, please be careful that you select the correct start and end times for your scheduled exam when setting or modifying these parameters.',
+            'desc' => "You can use communication blocking to prevent $usertype enrolled in this course from displaying LON-CAPA messages sent by other $usertype during an online exam. As blocking of communication could potentially interrupt legitimate communication between $usertype who are also both enrolled in a different LON-CAPA course, please be careful that you select the correct start and end times for your scheduled exam when setting or modifying these parameters.",
              'mecb' => 'Modify existing communication blocking periods',
              'ncbc' => 'No communication blocks currently stored'
     );
@@ -1275,76 +1227,54 @@ sub get_blockdates {
                          $env{'course.'.$env{'request.course.id'}.'.domain'},
                          $env{'course.'.$env{'request.course.id'}.'.num'}
                          );
-    $$blockcount = keys %{$records};
-                                                                                                             
-    foreach (keys %{$records}) {
-        if ($_ eq 'error: 2 tie(GDBM) Failed while attempting dump') {
-            $$blockcount = 0;
-            last;
-        }
+    $$blockcount = keys(%{$records});
+
+    if ((keys(%{$records}))[0] =~ /^error: 2 /) {
+	$records = {};
+	$$blockcount = 0;
     }
 }
 
 sub display_blocker_status {
     my ($r,$records,$ltext) = @_;
     my $parmcount = 0;
-    my @bgcols = ("#eeeeee","#dddddd");
-    my $function = &Apache::loncommon::get_users_function();
-    my $color = &Apache::loncommon::designparm($function.'.tabbg',
-                                                    $env{'user.domain'});
+  
     my %lt = &Apache::lonlocal::texthash(
         'modi' => 'Modify',
         'canc' => 'Cancel',
     );
+    $r->print(&Apache::loncommon::start_data_table());
     $r->print(<<"END");
-<table border="0" cellpadding="0" cellspacing="0">
- <tr>
-  <td width="100%" bgcolor="#000000">
-   <table width="100%" border="0" cellpadding="1" cellspacing="0">
-    <tr>
-     <td width="100%" bgcolor="#000000">
-      <table border="0" cellpadding="3" cellspacing="3" bgcolor="#FFFFFF">
-       <tr bgcolor="$color">
-        <td><b>$$ltext{'dura'}</b></td>
-        <td><b>$$ltext{'setb'}</b></td>
-        <td><b>$$ltext{'even'}</b></td>
-        <td><b>$$ltext{'actn'}?</b></td>
-       </tr>
+  <tr>
+    <th>$$ltext{'dura'}</th>
+    <th>$$ltext{'setb'}</th>
+    <th>$$ltext{'even'}</th>
+    <th>$$ltext{'actn'}?</th>
+  </tr>
 END
-    foreach (sort keys %{$records}) {
-        my $iter = $parmcount%2;
+    foreach my $record (sort(keys(%{$records}))) {
         my $onchange = 'onFocus="javascript:window.document.forms['.
                        "'blockform'].elements['modify_".$parmcount."'].".
                        'checked=true;"';
-        my ($start,$end) = split/____/,$_;
+        my ($start,$end) = split(/____/,$record);
         my $startform = &Apache::lonhtmlcommon::date_setter('blockform','startdate_'.$parmcount,$start,$onchange);
         my $endform = &Apache::lonhtmlcommon::date_setter('blockform','enddate_'.$parmcount,$end,$onchange);
-	my (@data,$setuname,$setudom,$title);
-	@data = split(/:/,$$records{$_},3);
-	if (scalar(@data) eq 2) {
-	    $title = $data[1];
-	    ($setuname,$setudom) = split(/@/,$data[0]);
-	} else {
-	    ($setuname,$setudom,$title) = @data;
-	}
+	
+	my ($setuname,$setudom,$title) = 
+	    &parse_block_record($$records{$record});
+	$title = &HTML::Entities::encode($title,'"<>&');
         my $settername = &Apache::loncommon::plainname($setuname,$setudom);
+        $r->print(&Apache::loncommon::start_data_table_row());
         $r->print(<<"END");
-       <tr bgcolor="$bgcols[$iter]">
         <td>$$ltext{'star'}:&nbsp;$startform<br/>$$ltext{'endd'}:&nbsp;&nbsp;$endform</td>
         <td>$settername</td>
-        <td><input type="text" name="title_$parmcount" size="15" value="$title" /><input type="hidden" name="key_$parmcount" value="$_" /></td>
+        <td><input type="text" name="title_$parmcount" size="15" value="$title" /><input type="hidden" name="key_$parmcount" value="$record" /></td>
         <td><label>$lt{'modi'}?&nbsp;<input type="checkbox" name="modify_$parmcount" /></label><br /><label>$lt{'canc'}?&nbsp;&nbsp;<input type="checkbox" name="cancel_$parmcount" /></label>
-       </tr>
 END
-        $parmcount ++;
+        $r->print(&Apache::loncommon::end_data_table_row());
+        $parmcount++;
     }
     $r->print(<<"END");
-      </table>
-     </td>
-    </tr>
-   </table>
-  </td>
- </tr>
 </table>
 <br />
 <br />
@@ -1352,6 +1282,19 @@ END
     return $parmcount;
 }
 
+sub parse_block_record {
+    my ($record) = @_;
+    my ($setuname,$setudom,$title);
+    my @data = split(/:/,$record,3);
+    if (scalar(@data) eq 2) {
+	$title = $data[1];
+	($setuname,$setudom) = split(/@/,$data[0]);
+    } else {
+	($setuname,$setudom,$title) = @data;
+    }
+    return ($setuname,$setudom,$title);
+}
+
 sub display_addblocker_table {
     my ($r,$parmcount,$ltext) = @_;
     my $start = time;
@@ -1361,9 +1304,6 @@ sub display_addblocker_table {
                    'checked=true;"';
     my $startform = &Apache::lonhtmlcommon::date_setter('blockform','startdate_'.$parmcount,$start,$onchange);
     my $endform = &Apache::lonhtmlcommon::date_setter('blockform','enddate_'.$parmcount,$end,$onchange);
-    my $function = &Apache::loncommon::get_users_function();
-    my $color = &Apache::loncommon::designparm($function.'.tabbg',
-                                                    $env{'user.domain'});
     my %lt = &Apache::lonlocal::texthash(
         'addb' => 'Add block',
         'exam' => 'e.g., Exam 1',
@@ -1371,133 +1311,106 @@ sub display_addblocker_table {
     );
     $r->print(<<"END");
 <h4>$lt{'addn'}</h4> 
-<table border="0" cellpadding="0" cellspacing="0">
- <tr>
-  <td width="100%" bgcolor="#000000">
-   <table width="100%" border="0" cellpadding="1" cellspacing="0">
-    <tr>
-     <td width="100%" bgcolor="#000000">
-      <table border="0" cellpadding="3" cellspacing="3" bgcolor="#FFFFFF">
-       <tr bgcolor="#CCCCFF">
-        <td><b>$$ltext{'dura'}</b></td>
-        <td><b>$$ltext{'even'} $lt{'exam'}</b></td>
-        <td><b>$$ltext{'actn'}?</b></td>
-       </tr>
-       <tr bgcolor="#eeeeee">
-        <td>$$ltext{'star'}:&nbsp;$startform<br />$$ltext{'endd'}:&nbsp;&nbsp;$endform</td>
-        <td><input type="text" name="title_$parmcount" size="15" value="" /></td>
-        <td><label>$lt{'addb'}?&nbsp;<input type="checkbox" name="add_$parmcount" value="1" /></label></td>
-       </tr>
-      </table>
-     </td>
-    </tr>
-   </table>
-  </td>
- </tr>
-</table>
 END
+    $r->print(&Apache::loncommon::start_data_table());
+    $r->print(<<"END");
+   <tr>
+     <th>$$ltext{'dura'}</th>
+     <th>$$ltext{'even'} $lt{'exam'}</th>
+     <th>$$ltext{'actn'}?</th>
+   </tr>
+END
+   $r->print(&Apache::loncommon::start_data_table_row());
+    $r->print(<<"END");
+     <td>$$ltext{'star'}:&nbsp;$startform<br />$$ltext{'endd'}:&nbsp;&nbsp;$endform</td>
+     <td><input type="text" name="title_$parmcount" size="15" value="" /></td>
+     <td><label>$lt{'addb'}?&nbsp;<input type="checkbox" name="add_$parmcount" value="1" /></label></td>
+END
+    $r->print(&Apache::loncommon::end_data_table_row());
+    $r->print(&Apache::loncommon::end_data_table());
     return;
 }
 
 sub blockcheck {
     my ($setters,$startblock,$endblock) = @_;
     # Retrieve active student roles and active course coordinator/instructor roles
-    my @livecses = ();
-    my @staffcses = ();
-    $$startblock = 0;
-    $$endblock = 0;
-    foreach (keys %env) {
-        if ($_ =~ m-^user\.role\.(st|cc|in)\./(.+)$-) {
-            my $role = $1;
-            my $cse = $2;
-            $cse =~ s|/|_|;
-            if ($env{$_} =~ m/^(\d*)\.(\d*)$/) {
-                unless (($2 > 0 && $2 < time) || ($1 > time)) {
-                    if ($role eq 'st') {
-                        push @livecses, $cse;
-                    } else {
-                        unless (grep/^$cse$/,@staffcses) {
-                            push @staffcses, $cse;
-                        }
-                    }
-                }
-            }
-        } elsif ($_ =~ m-user\.role\.cr/(\w+)/(\w+)/([^/]+)\./(.+)$- ) { 
-            my $rolepriv = $env{'user.role..rolesdef_'.$3};
-        }
-    }
-    # Retrieve blocking times and identity of blocker for active courses for students.
-    if (@livecses > 0) {
-        foreach my $cse (@livecses) {
-            my ($cdom,$crs) = split/_/,$cse;
-            if ( (grep/^$cse$/,@staffcses) && ($env{'request.role'} !~ m-^st\./$cdom/$crs$-) ) {
-                next;
-            } else {
-                %{$$setters{$cse}} = ();
-                @{$$setters{$cse}{'staff'}} = ();
-                @{$$setters{$cse}{'times'}} = ();
-                my %records = &Apache::lonnet::dump('comm_block',$cdom,$crs);
-                foreach (keys %records) {
-                    if ($_ =~ m/^(\d+)____(\d+)$/) {
-                        if ($1 <= time && $2 >= time) {
-                            my ($staff,$title) = split/:/,$records{$_};
-                            push @{$$setters{$cse}{'staff'}}, $staff;
-                            push @{$$setters{$cse}{'times'}}, $_;
-                            if ( ($$startblock == 0) || ($$startblock > $1) ) {
-                                $$startblock = $1;
-                            }
-                            if ( ($$endblock == 0) || ($$endblock < $2) ) {
-                                $$endblock = $2;
-                            }
-                        }
-                    }
-                }
-            }
-        }
+    my %live_courses =
+	map { $_ => 1} &Apache::loncommon::findallcourses();
+    # FIXME should really probe for apriv, but ::allowed can only probe the 
+    #       currently active role
+    my %staff_of =
+	map { $_ => 1} &Apache::loncommon::findallcourses(['cc','in']);
+
+    # Retrieve blocking times and identity of blocker for active courses
+    # for students.
+    return if (!%live_courses);
+
+    foreach my $course (keys(%live_courses)) {
+	my $cdom = $env{'course.'.$course.'.domain'};
+	my $cnum = $env{'course.'.$course.'.num'};
+
+	# if they are a staff member and are currently not playing student
+	next if ( $staff_of{$course} 
+		  && ($env{'request.role'} !~ m{^st\./$cdom/$cnum}));
+
+	$setters->{$course} = {};
+	$setters->{$course}{'staff'} = [];
+	$setters->{$course}{'times'} = [];
+	my %records = &Apache::lonnet::dump('comm_block',$cdom,$cnum);
+	foreach my $record (keys %records) {
+	    my ($start,$end) = ($record =~ m/^(\d+)____(\d+)$/);
+	    if ($start <= time && $end >= time) {
+		my ($staff_name,$staff_dom,$title) = 
+		    &parse_block_record($records{$record});
+		push(@{$$setters{$course}{'staff'}}, [$staff_name,$staff_dom]);
+		push(@{$$setters{$course}{'times'}}, [$start,$end]);
+		if ( ($$startblock == 0) || ($$startblock > $1) ) {
+		    $$startblock = $1;
+		}
+		if ( ($$endblock == 0) || ($$endblock < $2) ) {
+		    $$endblock = $2;
+		}
+	    }
+	}
     }
 }
 
 sub build_block_table {
     my ($r,$startblock,$endblock,$setters) = @_;
-    my $function = &Apache::loncommon::get_users_function();
-    my $color = &Apache::loncommon::designparm($function.'.tabbg',
-                                                    $env{'user.domain'});
     my %lt = &Apache::lonlocal::texthash(
         'cacb' => 'Currently active communication blocks',
-        'cour' => 'Course',
+        'cour' => 'Course/Group',
         'dura' => 'Duration',
         'blse' => 'Block set by'
-    ); 
+    );
     $r->print(<<"END");
-<br /<br />$lt{'cacb'}:<br /><br />
-<table border="0" cellpadding="0" cellspacing="0">
- <tr>
-  <td width="100%" bgcolor="#000000">
-   <table width="100%" border="0" cellpadding="1" cellspacing="0">
-    <tr>
-     <td width="100%" bgcolor="#000000">
-      <table border="0" cellpadding="3" cellspacing="3" bgcolor="#FFFFFF">
-       <tr bgcolor="$color">
-        <td><b>$lt{'cour'}</b></td>
-        <td><b>$lt{'dura'}</b></td>
-        <td><b>$lt{'blse'}</b></td>
-       </tr>
+<br /><br />$lt{'cacb'}:<br /><br />
 END
-    foreach (keys %{$setters}) {
-        my %courseinfo=&Apache::lonnet::coursedescription($_);
-        for (my $i=0; $i<@{$$setters{$_}{staff}}; $i++) {
-            my ($uname,$udom) = split/\@/,$$setters{$_}{staff}[$i];
+    $r->print(&Apache::loncommon::start_data_table());
+    $r->print(<<"END");
+<tr>
+ <th>$lt{'cour'}</th>
+ <th>$lt{'dura'}</th>
+ <th>$lt{'blse'}</th>
+</tr>
+END
+    foreach my $course (keys(%{$setters})) {
+        my %courseinfo=&Apache::lonnet::coursedescription($course);
+        for (my $i=0; $i<@{$$setters{$course}{staff}}; $i++) {
+            my ($uname,$udom) = @{$$setters{$course}{staff}[$i]};
             my $fullname = &Apache::loncommon::plainname($uname,$udom);
-            my ($openblock,$closeblock) = split/____/,$$setters{$_}{times}[$i];
+            my ($openblock,$closeblock) = @{$$setters{$course}{times}[$i]};
             $openblock = &Apache::lonlocal::locallocaltime($openblock);
             $closeblock= &Apache::lonlocal::locallocaltime($closeblock);
-            $r->print('<tr><td>'.$courseinfo{'description'}.'</td>'.
+            $r->print(&Apache::loncommon::start_data_table_row().
+		      '<td>'.$courseinfo{'description'}.'</td>'.
                       '<td>'.$openblock.' to '.$closeblock.'</td>'.
                       '<td>'.$fullname.' ('.$uname.':'.$udom.
-                      ')</td></tr>');
+                      ')</td>'.
+		       &Apache::loncommon::end_data_table_row());
         }
     }
-    $r->print('</table></td></tr></table></td></tr></table>');
+    $r->print(&Apache::loncommon::end_data_table());
 }
 
 # ----------------------------------------------------------- Display a message
@@ -1510,6 +1423,8 @@ sub displaymessage {
     my $startblock = 0;
     my $endblock = 0;
     my $numblocked = 0;
+    my $crstype = &Apache::loncommon::course_type();
+
 # info to generate "next" and "previous" buttons and check if message is blocked
     &blockcheck(\%setters,\$startblock,\$endblock);
     my @messages=&sortedmessages(\%blocked,$startblock,$endblock,\$numblocked,$folder);
@@ -1525,7 +1440,7 @@ sub displaymessage {
 
     my $counter=0;
     $r->print('<pre>');
-    my $escmsgid=&Apache::lonnet::escape($msgid);
+    my $escmsgid=&escape($msgid);
     foreach (@messages) {
 	if ($_->[5] eq $escmsgid){
 	    last;
@@ -1535,17 +1450,17 @@ sub displaymessage {
     $r->print('</pre>');
     my $number_of_messages = scalar(@messages); #subtract 1 for last index
 # start output
-    &printheader($r,'/adm/email?display='.&Apache::lonnet::escape($msgid),'Display a Message','',$content{'baseurl'});
+    &printheader($r,'/adm/email?display='.&escape($msgid),'Display a Message','',$content{'baseurl'});
     my %courseinfo=&Apache::lonnet::coursedescription($content{'courseid'});
 # Functions
     $r->print('<table border="2" width="100%"><tr bgcolor="#FFFFAA"><td>'.&mt('Functions').':</td>'.
-	      '<td><a href="/adm/email?replyto='.&Apache::lonnet::escape($msgid).$sqs.
+	      '<td><a href="/adm/email?replyto='.&escape($msgid).$sqs.
 	      '"><b>'.&mt('Reply').'</b></a></td>'.
-	      '<td><a href="/adm/email?forward='.&Apache::lonnet::escape($msgid).$sqs.
+	      '<td><a href="/adm/email?forward='.&escape($msgid).$sqs.
 	      '"><b>'.&mt('Forward').'</b></a></td>'.
-	      '<td><a href="/adm/email?markunread='.&Apache::lonnet::escape($msgid).$sqs.
+	      '<td><a href="/adm/email?markunread='.&escape($msgid).$sqs.
 	      '"><b>'.&mt('Mark Unread').'</b></a></td>'.
-	      '<td><a href="/adm/email?markdel='.&Apache::lonnet::escape($msgid).$sqs.
+	      '<td><a href="/adm/email?markdel='.&escape($msgid).$sqs.
 	      '"><b>'.&mt('Delete').'</b></a></td>'.
 	      '<td><a href="/adm/email?'.$sqs.
 	      ($env{'form.dismode'} eq 'new'?'&folder=new':'').
@@ -1591,8 +1506,8 @@ sub displaymessage {
 	      $content{'sendername'}.' at '.
 	      $content{'senderdomain'}.') ':'<br /><b>'.&mt('To').':</b> '.
               $tolist).
-	      ($content{'courseid'}?'<br /><b>'.&mt('Course').':</b> '.$courseinfo{'description'}.
-	       ($content{'coursesec'}?' ('.&mt('Group/Section').': '.$content{'coursesec'}.')':''):'').
+	      ($content{'courseid'}?'<br /><b>'.&mt($crstype).':</b> '.$courseinfo{'description'}.
+	       ($content{'coursesec'}?' ('.&mt('Section').': '.$content{'coursesec'}.')':''):'').
 	      '<br /><b>'.&mt('Time').':</b> '.$content{'time'}.
 	      ($content{'baseurl'}?'<br /><b>'.&mt('Refers to').':</b> <a href="'.$content{'baseurl'}.'">'.
 	       $content{'baseurl'}.' ('.&Apache::lonnet::gettitle($content{'baseurl'}).')</a>':'').
@@ -1649,7 +1564,7 @@ sub header {
     $r->print(&Apache::loncommon::start_page('Communication and Messages',
 					     $extra));
     $r->print(&Apache::lonhtmlcommon::breadcrumbs
-	      (undef,($title?$title:'Communication and Messages')));
+	      (($title?$title:'Communication and Messages')));
 
 }
 
@@ -1674,14 +1589,14 @@ sub storecomment {
 	    $cleanmsgtxt.=$_."\n";
 	}
     }
-    my $key=&Apache::lonnet::escape($env{'form.baseurl'}).'___'.time;
+    my $key=&escape($env{'form.baseurl'}).'___'.time;
     &Apache::lonnet::put('nohist_stored_comments',{ $key => $cleanmsgtxt });
 }
 
 sub storedcommentlisting {
     my ($r)=@_;
     my %msgs=&Apache::lonnet::dump('nohist_stored_comments',undef,undef,
-       '^'.&Apache::lonnet::escape(&Apache::lonnet::escape($env{'form.showcommentbaseurl'})));
+       '^'.&escape(&escape($env{'form.showcommentbaseurl'})));
     $r->print(&Apache::loncommon::start_page('Stored Comment Listing',undef,
 					     {'onlybody' => 1}));
     if ((keys %msgs)[0]=~/^error\:/) {
@@ -1726,13 +1641,27 @@ sub sendoffmail {
 	    &statuschange($msgid,'replied',$folder);
 	}
 
+	my @to =
+	    &Apache::loncommon::get_env_multiple('form.selectedusers.forminput');
+	my $mode = $env{'form.sendmode'};
+
 	my %toaddr;
-	if ($env{'form.sendmode'} eq 'group') {
-	    foreach my $address (keys(%env)) {
-		if ($address=~/^form\.send\_to\_\&\&\&[^\&]*\&\&\&\_(.+)$/) {
-		    $toaddr{$1}='';
+	if (@to) {
+	    foreach my $dest (@to) {
+		my ($user,$domain) = split(/:/, $dest);
+		if (($user ne '') && ($domain ne '')) {
+		    my $address = $user.":".$domain; # How the code below expects it.
+		    $toaddr{$address} = '';
 		}
 	    }
+	}
+
+	if ($env{'form.sendmode'} eq 'group') {
+	     foreach my $address (keys(%env)) {
+	 	if ($address=~/^form\.send\_to\_\&\&\&[^\&]*\&\&\&\_(.+)$/) {
+	 	    $toaddr{$1}='';
+	 	}
+	    }
 	} elsif ($env{'form.sendmode'} eq 'upload') {
 	    foreach my $line (split(/[\n\r\f]+/,$env{'form.upfile'})) {
 		my ($rec,$txt)=split(/\s*\:\s*/,$line);
@@ -1742,12 +1671,16 @@ sub sendoffmail {
 		}
 	    }
 	} else {
-	    $toaddr{$env{'form.recuname'}.':'.$env{'form.recdomain'}}='';
+	    if (($env{'form.recuname'} ne '') && ($env{'form.recdomain'} ne '')) {
+		$toaddr{$env{'form.recuname'}.':'.$env{'form.recdomain'}}='';
+	    }
 	}
 	if ($env{'form.additionalrec'}) {
 	    foreach (split(/\,/,$env{'form.additionalrec'})) {
 		my ($auname,$audom)=split(/\@/,$_);
-		$toaddr{$auname.':'.$audom}='';
+		if (($auname ne "") && ($audom ne "")) {
+		    $toaddr{$auname.':'.$audom}='';
+		}
 	    }
 	}
 
@@ -1816,20 +1749,20 @@ sub sendoffmail {
             my ($specialmsgid,$specialresult);
             my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
             my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
-            my $course_str = &Apache::lonnet::escape('['.$cnum.':'.$cdom.']');
+            my $course_str = &escape('['.$cnum.':'.$cdom.']');
 
             if ($numspecial) {
                 $specialresult = &Apache::lonmsg::user_normal_msg_raw($cnum,$cdom,$subj_prefix.
                     ' '.$course_str,$savemsg,undef,undef,undef,
                     undef,undef,\$specialmsgid);
-                $specialmsgid = &Apache::lonnet::unescape($specialmsgid);
+                $specialmsgid = &unescape($specialmsgid);
             }
             if ($specialresult eq 'ok') {
                 my $record_sent;
                 my @recusers;
                 my @recudoms;
                 my ($stamp,$crssubj,$msgname,$msgdom,$msgcount,$context,$pid) =
-		    split(/\:/,&Apache::lonnet::unescape($specialmsgid));
+		    split(/\:/,&unescape($specialmsgid));
 
                 foreach my $recipient (sort(keys(%toaddr))) {
                     if ($specialmsg_status{$recipient} eq 'ok') {
@@ -1876,7 +1809,7 @@ sub sendoffmail {
 	}
     } else {
 	$r->print('<p><span class="LC_error">'.&mt('Could not deliver message').'</span> '.
-		  &mt('Please use the browser "Back" button and correct the recipient addresses').'</p>');
+		  &mt('Please use the browser "Back" button and correct the recipient addresses '."($sendstatus)").'</p>');
     }
 }
 
@@ -1897,7 +1830,7 @@ sub handler {
         ['display','replyto','forward','markread','markdel','markunread',
          'sendreply','compose','sendmail','critical','recname','recdom',
          'recordftf','sortedby','block','folder','startdis','interdis',
-	 'showcommentbaseurl','dismode']);
+	 'showcommentbaseurl','dismode','group','subject','text']);
     $sqs='&sortedby='.$env{'form.sortedby'};
 
 # ------------------------------------------------------ They checked for email
@@ -1919,7 +1852,7 @@ sub handler {
     unless ($folder) { 
 	$folder=''; 
     } else {
-	$sqs.='&folder='.&Apache::lonnet::escape($folder);
+	$sqs.='&folder='.&escape($folder);
     }
 # ------------------------------------------------------------ Get Display Mode
 
@@ -1927,7 +1860,7 @@ sub handler {
     unless ($dismode) { 
 	$dismode=''; 
     } else {
-	$sqs.='&dismode='.&Apache::lonnet::escape($dismode);
+	$sqs.='&dismode='.&escape($dismode);
     }
 
 # --------------------------------------------------------------------- Display
@@ -1997,7 +1930,7 @@ sub handler {
 	foreach my $key (keys(%env)) {
 	    if ($key=~/^form\.delmark_(.*)$/) {
 		my ($result,$msg) =
-		    &movemsg(&Apache::lonnet::unescape($1),$folder,
+		    &movemsg(&unescape($1),$folder,
 			     $env{'form.movetofolder'});
 		if ($result) {
 		    $total++;
@@ -2024,7 +1957,7 @@ sub handler {
 	foreach my $key (keys(%env)) {
 	    if ($key=~/^form\.delmark_(.*)$/) {
 		my ($result,$msg) = 
-		    &statuschange(&Apache::lonnet::unescape($1),'deleted',
+		    &statuschange(&unescape($1),'deleted',
 				  $folder);
 		if ($result) {
 		    $total++;