--- loncom/interface/lonfeedback.pm	2002/09/16 19:54:01	1.32
+++ loncom/interface/lonfeedback.pm	2002/10/28 23:28:52	1.37
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Feedback
 #
-# $Id: lonfeedback.pm,v 1.32 2002/09/16 19:54:01 albertel Exp $
+# $Id: lonfeedback.pm,v 1.37 2002/10/28 23:28:52 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -50,6 +50,7 @@ use strict;
 use Apache::Constants qw(:common);
 use Apache::lonmsg();
 use Apache::loncommon();
+use Apache::lontexconvert();
 
 sub mail_screen {
   my ($r,$feedurl,$options) = @_;
@@ -114,9 +115,8 @@ My question/comment/feedback:<p>
 <input type=hidden name=sendit value=1>
 <input type=button value="Send Feedback" onClick='gosubmit();'></input>
 </form>
-</body>
-</html>
 ENDDOCUMENT
+$r->print(&generate_preview_button().'</body></html>');
 }
 
 sub fail_redirect {
@@ -179,20 +179,20 @@ ENDNOREDIRTWO
 sub screen_header {
   my ($feedurl) = @_;
   my $options='';
-  if (($feedurl=~/^\/res/) && ($feedurl!~/^\/res\/adm/)) {
+  if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
     $options= 
       '<p><input type=checkbox name=author> Feedback to resource author';
   }
-  if ($ENV{'course.'.$ENV{'request.course.id'}.'.question.email'}) {
+  if (&feedback_available(1)) {
     $options.=
     '<br><input type=checkbox name=question> Question about resource content';
   }
-  if ($ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}) {
+  if (&feedback_available(0,1)) {
     $options.=
       '<br><input type=checkbox name=course> '.
 	'Question/Comment/Feedback about course content';
   }
-  if ($ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'}) {
+  if (&feedback_available(0,0,1)) {
     $options.=
       '<br><input type=checkbox name=policy> '.
 	'Question/Comment/Feedback about course policy';
@@ -227,8 +227,22 @@ sub resource_output {
 
 sub clear_out_html {
   my $message=$ENV{'form.comment'};
-  $message=~s/\</\&lt\;/g;
-  $message=~s/\>/\&gt\;/g;
+  my $cid=$ENV{'request.course.id'};
+  if ($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) {
+      # allows <B> <I> <P> <A> <LI> <OL> <UL> <EM> <BR> <TT> <STRONG> 
+      # <BLOCKQUOTE> <DIV .*> <DIV> <IMG>
+      my %html=(B=>1, I=>1, P=>1, A=>1, LI=>1, OL=>1, UL=>1, EM=>1,
+		BR=>1, TT=>1, STRONG=>1, BLOCKQUOTE=>1, DIV=>1, IMG=>1);
+
+      $message =~ s/\<(\/?\s*(\w+)[^\>\<]*)/
+	  {($html{uc($2)}&(length($1)<1000))?"\<$1":"\&lt;$1"}/ge;
+      $message =~ s/(\<?\s*(\w+)[^\<\>]*)\>/
+	  {($html{uc($2)}&(length($1)<1000))?"$1\>":"$1\&gt;"}/ge;
+  } else {
+      $message=~s/\<\/*m\s*\>//g;
+      $message=~s/\</\&lt\;/g;
+      $message=~s/\>/\&gt\;/g;
+  }
   return $message;
 }
 
@@ -249,42 +263,74 @@ ENDCITE
   return ($email,$citations);
 }
 
+sub secapply {
+    my $rec=shift;
+    my $defaultflag=shift;
+    $rec=~s/\s+//g;
+    $rec=~s/\@/\:/g;
+    my ($adr,$sections)=($rec=~/^([^\(]+)\(([^\)]+)\)/);
+    if ($sections) {
+	foreach (split(/\;/,$sections)) {
+            if (($_ eq $ENV{'request.course.sec'}) ||
+                ($defaultflag && ($_ eq '*'))) {
+                return $adr; 
+            }
+        }
+    } else {
+       return $rec;
+    }
+    return '';
+}
+
 sub decide_receiver {
-  my ($feedurl) = @_;
+  my ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
   my $typestyle='';
   my %to=();
-  if ($ENV{'form.author'}) {
+  if ($ENV{'form.author'}||$author) {
     $typestyle.='Submitting as Author Feedback<br>';
     $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
     $to{$2.':'.$1}=1;
   }
-  if ($ENV{'form.question'}) {
+  if ($ENV{'form.question'}||$question) {
     $typestyle.='Submitting as Question<br>';
     foreach (split(/\,/,
 		   $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
 	     ) {
-      $to{$_}=1;
+	my $rec=&secapply($_,$defaultflag);
+        if ($rec) { $to{$rec}=1; }
     } 
   }
-  if ($ENV{'form.course'}) {
+  if ($ENV{'form.course'}||$course) {
     $typestyle.='Submitting as Comment<br>';
     foreach (split(/\,/,
 		   $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
 	     ) {
-      $to{$_}=1;
+	my $rec=&secapply($_,$defaultflag);
+        if ($rec) { $to{$rec}=1; }
     } 
   }
-  if ($ENV{'form.policy'}) {
+  if ($ENV{'form.policy'}||$policy) {
     $typestyle.='Submitting as Policy Feedback<br>';
     foreach (split(/\,/,
 		   $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
 	     ) {
-      $to{$_}=1;
+	my $rec=&secapply($_,$defaultflag);
+        if ($rec) { $to{$rec}=1; }
     } 
   }
+  if ((scalar(%to) eq '0') && (!$defaultflag)) {
+     ($typestyle,%to)=
+	 &decide_receiver($feedurl,$author,$question,$course,$policy,1);
+  }
   return ($typestyle,%to);
 }
 
+sub feedback_available {
+    my ($question,$course,$policy)=@_;
+    my ($typestyle,%to)=&decide_receiver('',0,$question,$course,$policy);
+    return scalar(%to);
+}
+
 sub send_msg {
   my ($feedurl,$email,$citations,%to)=@_;
   my $status='';
@@ -293,7 +339,7 @@ sub send_msg {
     if ($_) {
       my $declutter=&Apache::lonnet::declutter($feedurl);
       unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
-               'Feedback ['.$declutter.']',$email,$citations) eq 'ok') {
+               'Feedback ['.$declutter.']',$email,$citations)=~/ok/) {
 	$status.='<br>Error sending message to '.$_.'<br>';
       } else {
 	$sendsomething++;
@@ -358,6 +404,26 @@ sub adddiscuss {
     return $status.'<br>';   
 }
 
+# ----------------------------------------------------------- Preview function
+
+sub show_preview {
+    my $r=shift;
+    my $message=&clear_out_html($ENV{'form.comment'});
+    $message=~s/\n/\<br \/\>/g;
+    $message=&Apache::lontexconvert::msgtexconverted($message);
+    $r->print('<table border="2"><tr><td>'.
+       $message.'</td></tr></table>');
+}
+
+sub generate_preview_button {
+    return(<<ENDPREVIEW);
+<form name="preview" action="/adm/feedback?preview=1" method="post" target="preview">
+<input type="hidden" name="comment" />
+<input type="button" value="Show Preview"
+onClick="this.form.comment.value=document.mailform.comment.value;this.form.submit();" />
+</form>
+ENDPREVIEW
+}
 sub handler {
   my $r = shift;
   if ($r->header_only) {
@@ -369,7 +435,7 @@ sub handler {
 # --------------------------- Get query string for limited number of parameters
 
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-                                           ['hide','unhide','postdata']);
+                                       ['hide','unhide','postdata','preview']);
 
   if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
 # ----------------------------------------------------------------- Hide/unhide
@@ -401,6 +467,9 @@ sub handler {
 
     &redirect_back($r,&Apache::lonnet::clutter($url),
        'Changed discussion status<p>','0','0');
+  } elsif ($ENV{'form.preview'}) {
+# -------------------------------------------------------- User wants a preview
+      &show_preview($r);
   } else {
 # ------------------------------------------------------------- Normal feedback
   my $feedurl=$ENV{'form.postdata'};