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Diff for /loncom/interface/lonfeedback.pm between versions 1.1 and 1.60

version 1.1, 2001/01/03 16:20:59 version 1.60, 2003/09/17 18:16:39
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Feedback  # Feedback
 #  #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
 # (Internal Server Error Handler  # (Internal Server Error Handler
 #  #
 # (Login Screen  # (Login Screen
Line 9 Line 33
 #  #
 # 3/1/1 Gerd Kortemeyer)  # 3/1/1 Gerd Kortemeyer)
 #  #
 # 3/1 Gerd Kortemeyer  # 3/1,2/3,2/5,2/6,2/8 Gerd Kortemeyer
   # 2/9 Guy Albertelli
   # 2/10 Gerd Kortemeyer
   # 2/13 Guy Albertelli
   # 7/25 Gerd Kortemeyer
   # 7/26 Guy Albertelli
   # 7/26,8/10,10/1,11/5,11/6,12/27,12/29 Gerd Kortemeyer
   # YEAR=2002
   # 1/1,1/16 Gerd Kortemeyer
 #  #
   
 package Apache::lonfeedback;  package Apache::lonfeedback;
   
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
   use Apache::lonmsg();
   use Apache::loncommon();
   use Apache::lontexconvert();
   
 sub handler {  sub list_discussion {
     my $r = shift;      my ($mode,$status,$symb)=@_;
     $r->content_type('text/html');      my $discussiononly=0;
     $r->send_http_header;      if ($mode eq 'board') { $discussiononly=1; }
     return OK if $r->header_only;      unless ($ENV{'request.course.id'}) { return ''; }
       my $crs='/'.$ENV{'request.course.id'};
       if ($ENV{'request.course.sec'}) {
    $crs.='_'.$ENV{'request.course.sec'};
       }                 
       $crs=~s/\_/\//g;
       unless ($symb) {
    $symb=&Apache::lonnet::symbread();
       }
       unless ($symb) { return ''; }
       my $seeid=&Apache::lonnet::allowed('rin',$crs);
       my $viewgrades=&Apache::lonnet::allowed('vgr',$crs);
       my $discussion='';
       my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
     $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
       if ($contrib{'version'}) {
    unless ($discussiononly) {
       $discussion.=
    '<address><hr />';
    }
    my $idx;
    for ($idx=1;$idx<=$contrib{'version'};$idx++) {
       my $hidden=($contrib{'hidden'}=~/\.$idx\./);
       my $deleted=($contrib{'deleted'}=~/\.$idx\./);
       unless ((($hidden) && (!$seeid)) || ($deleted)) {
    my $message=$contrib{$idx.':message'};
    $message=~s/\n/\<br \/\>/g;
    $message=&Apache::lontexconvert::msgtexconverted($message);
    if ($contrib{$idx.':attachmenturl'}) {
       my ($fname,$ft)
                           =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
       $message.='<p>Attachment: <a href="'.
    &Apache::lonnet::tokenwrapper(
                                                $contrib{$idx.':attachmenturl'}).
    '"><tt>'.$fname.'.'.$ft.'</tt></a>';
    }
    if ($message) {
       if ($hidden) {
    $message='<font color="#888888">'.$message.'</font>';
       }
       my $screenname=&Apache::loncommon::screenname(
       $contrib{$idx.':sendername'},
       $contrib{$idx.':senderdomain'});
       my $plainname=&Apache::loncommon::nickname(
       $contrib{$idx.':sendername'},
       $contrib{$idx.':senderdomain'});
       
       my $sender='Anonymous';
       if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
    $sender=&Apache::loncommon::aboutmewrapper(
    $plainname,
    $contrib{$idx.':sendername'},
    $contrib{$idx.':senderdomain'}).' ('.
    $contrib{$idx.':sendername'}.' at '.
    $contrib{$idx.':senderdomain'}.')';
    if ($contrib{$idx.':anonymous'}) {
       $sender.=' [anonymous] '.
    $screenname;
    }
    if ($seeid) {
       if ($hidden) {
    $sender.=' <a href="/adm/feedback?unhide='.
       $symb.':::'.$idx.'">Make Visible</a>';
       } else {
    $sender.=' <a href="/adm/feedback?hide='.
       $symb.':::'.$idx.'">Hide</a>';
       }                     
       $sender.=' <a href="/adm/feedback?deldisc='.
    $symb.':::'.$idx.'">Delete</a>';
    }
       } else {
    if ($screenname) {
       $sender='<i>'.$screenname.'</i>';
    }
       }
       my $vgrlink;
       if ($viewgrades) {
    $vgrlink=&Apache::loncommon::submlink('Submissions',
               $contrib{$idx.':sendername'},$contrib{$idx.':senderdomain'},$symb);
       }
       $discussion.='<p><b>'.$sender.'</b> '.$vgrlink.' ('.
    localtime($contrib{$idx.':timestamp'}).
    '):<blockquote>'.$message.
    '</blockquote></p>';
           }
       } 
    }
    unless ($discussiononly) {
       $discussion.='</address>';
    }
       }
       if ($discussiononly) {
    $discussion.=(<<ENDDISCUSS);
   <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
   <input type="submit" name="discuss" value="Post Discussion" />
   <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
   <input type="hidden" name="symb" value="$symb" />
   <input type="hidden" name="sendit" value="true" />
   <br />
   <font size="1">Note: in anonymous discussion, your name is visible only to
   course faculty</font><br />
   <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
   <p>
   Attachment (128 KB max size): <input type="file" name="attachment" />
   </p>
   </form>
   ENDDISCUSS
         $discussion.=&generate_preview_button();
      }
      return $discussion;
   }
   
 # --------------------------------------------------- Print login screen header  sub mail_screen {
     $r->print(<<ENDDOCUMENT);    my ($r,$feedurl,$options) = @_;
     my $bodytag=&Apache::loncommon::bodytag('Resource Feedback and Discussion',
                                             '','onLoad="window.focus();"');
     my $title=&Apache::lonnet::gettitle($feedurl);
     if (!$title) { $title = $feedurl; }
     my $latexHelp = Apache::loncommon::helpLatexCheatsheet();
     $r->print(<<ENDDOCUMENT);
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <title>The LearningOnline Network with CAPA</title>
   <meta http-equiv="pragma" content="no-cache"></meta>
   <script>
       function gosubmit() {
           var rec=0;
           if (typeof(document.mailform.elements.author)!="undefined") {
             if (document.mailform.elements.author.checked) {
                rec=1;
             } 
           }
           if (typeof(document.mailform.elements.question)!="undefined") {
             if (document.mailform.elements.question.checked) {
                rec=1;
             } 
           }
           if (typeof(document.mailform.elements.course)!="undefined") {
             if (document.mailform.elements.course.checked) {
                rec=1;
             } 
           }
           if (typeof(document.mailform.elements.policy)!="undefined") {
             if (document.mailform.elements.policy.checked) {
                rec=1;
             } 
           }
           if (typeof(document.mailform.elements.discuss)!="undefined") {
             if (document.mailform.elements.discuss.checked) {
                rec=1;
             } 
           }
           if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
             if (document.mailform.elements.anondiscuss.checked) {
                rec=1;
             } 
           }
   
           if (rec) {
       document.mailform.submit();
           } else {
               alert('Please check a feedback type.');
    }
       }
   </script>
   </head>
   $bodytag
   <h2><tt>$title</tt></h2>
   <form action="/adm/feedback" method="post" name="mailform"
   enctype="multipart/form-data">
   <input type=hidden name=postdata value="$feedurl">
   Please check at least one of the following feedback types:
   $options<hr>
   My question/comment/feedback:<p>
   $latexHelp
   <textarea name=comment cols=60 rows=10 wrap=hard>
   </textarea><p>
   Attachment (128 KB max size): <input type="file" name="attachment" />
   </p>
   <p>
   <input type="hidden" name="sendit" value="1" />
   <input type=button value="Send Feedback" onClick='gosubmit();' />
   </p>
   </form>
   ENDDOCUMENT
   $r->print(&generate_preview_button().'</body></html>');
   }
   
   sub fail_redirect {
     my ($r,$feedurl) = @_;
     $r->print (<<ENDFAILREDIR);
   <head><title>Feedback not sent</title>
   <meta http-equiv="pragma" content="no-cache"></meta>
   <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
 </head>  </head>
   <html>
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
 <h1>Feedback</h1>  <img align=right src=/adm/lonIcons/lonlogos.gif>
 <img src="/adm/lonKaputt/lonconstruct.gif">  <b>Sorry, no recipients  ...</b>
 </body>  </body>
 </html>  </html>
 ENDDOCUMENT  ENDFAILREDIR
     return OK;  }
   
   sub redirect_back {
     my ($r,$feedurl,$typestyle,$sendsomething,$sendposts,$status) = @_;
     $r->print (<<ENDREDIR);
   <head>
   <title>Feedback sent</title>
   <meta http-equiv="pragma" content="no-cache"></meta>
   <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
   </head>
   <html>
   <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { this.document.reldt.submit(); self.close(); }'>
   <img align=right src=/adm/lonIcons/lonlogos.gif>
   $typestyle
   <b>Sent $sendsomething message(s), and $sendposts post(s).</b>
   <font color=red>$status</font>
   <form name="reldt" action="$feedurl" target="loncapaclient">
   </form>
   </body>
   </html>
   ENDREDIR
   }
   
   sub no_redirect_back {
     my ($r,$feedurl) = @_;
     $r->print (<<ENDNOREDIR);
   <head><title>Feedback not sent</title>
   <meta http-equiv="pragma" content="no-cache"></meta>
   ENDNOREDIR
   
     if ($feedurl!~/^\/adm\/feedback/) { 
       $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2; url='.$feedurl.'">');
     }
     
     $r->print (<<ENDNOREDIRTWO);
   </head>
   <html>
   <body bgcolor="#FFFFFF" onLoad='if (window.name!="loncapaclient") { self.close(); }'>
   <img align=right src=/adm/lonIcons/lonlogos.gif>
   <b>Sorry, no feedback possible on this resource  ...</b>
   </body>
   </html>
   ENDNOREDIRTWO
   }
   
   sub screen_header {
     my ($feedurl) = @_;
     my $msgoptions='';
     my $discussoptions='';
     if (($feedurl=~/^\/res\//) && ($feedurl!~/^\/res\/adm/)) {
       $msgoptions= 
         '<p><input type=checkbox name=author> Feedback to resource author';
     }
     if (&feedback_available(1)) {
       $msgoptions.=
       '<br><input type=checkbox name=question> Question about resource content';
     }
     if (&feedback_available(0,1)) {
       $msgoptions.=
         '<br><input type=checkbox name=course> '.
    'Question/Comment/Feedback about course content';
     }
     if (&feedback_available(0,0,1)) {
       $msgoptions.=
         '<br><input type=checkbox name=policy> '.
    'Question/Comment/Feedback about course policy';
     }
   
     if ($ENV{'request.course.id'}) {
         if (&Apache::lonnet::allowed('pch',
           $ENV{'request.course.id'}.
           ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
       $discussoptions='<input type="checkbox" name="discuss" onClick="this.form.anondiscuss.checked=false;"> '.
    'Contribution to course discussion of resource';
       $discussoptions.='<br><input type="checkbox" name="anondiscuss" onClick="this.form.discuss.checked=false;"> '.
    'Anonymous contribution to course discussion of resource'.
           ' <i>(name only visible to course faculty)</i>';
         }
     }
     if ($msgoptions) { $msgoptions='<h2>Sending Messages</h2>'.$msgoptions; }
     if ($discussoptions) { 
        $discussoptions='<h2>Discussion Contributions</h2>'.$discussoptions; }
     return $msgoptions.$discussoptions;
   }
   
   sub resource_output {
     my ($feedurl) = @_;
     my $usersaw=&Apache::lonnet::ssi_body($feedurl);
     $usersaw=~s/\<body[^\>]*\>//gi;
     $usersaw=~s/\<\/body\>//gi;
     $usersaw=~s/\<html\>//gi;
     $usersaw=~s/\<\/html\>//gi;
     $usersaw=~s/\<head\>//gi;
     $usersaw=~s/\<\/head\>//gi;
     $usersaw=~s/action\s*\=/would_be_action\=/gi;
     return $usersaw;
   }
   
   sub clear_out_html {
     my ($message,$override)=@_;
     my $cid=$ENV{'request.course.id'};
     if (($ENV{"course.$cid.allow_limited_html_in_feedback"} =~ m/yes/i) ||
         ($override)) {
         # 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;
   }
   
   sub assemble_email {
     my ($feedurl,$message,$prevattempts,$usersaw,$useranswer)=@_;
     my $email=<<"ENDEMAIL";
   Refers to <a href="$feedurl">$feedurl</a>
   
   $message
   ENDEMAIL
       my $citations=<<"ENDCITE";
   <h2>Previous attempts of student (if applicable)</h2>
   $prevattempts
   <p><hr>
   <h2>Original screen output (if applicable)</h2>
   $usersaw
   <h2>Correct Answer(s) (if applicable)</h2>
   $useranswer
   ENDCITE
     return ($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 ($feedurl,$author,$question,$course,$policy,$defaultflag) = @_;
     my $typestyle='';
     my %to=();
     if ($ENV{'form.author'}||$author) {
       $typestyle.='Submitting as Author Feedback<br>';
       $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
       $to{$2.':'.$1}=1;
     }
     if ($ENV{'form.question'}||$question) {
       $typestyle.='Submitting as Question<br>';
       foreach (split(/\,/,
      $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
        ) {
    my $rec=&secapply($_,$defaultflag);
           if ($rec) { $to{$rec}=1; }
       } 
     }
     if ($ENV{'form.course'}||$course) {
       $typestyle.='Submitting as Comment<br>';
       foreach (split(/\,/,
      $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
        ) {
    my $rec=&secapply($_,$defaultflag);
           if ($rec) { $to{$rec}=1; }
       } 
     }
     if ($ENV{'form.policy'}||$policy) {
       $typestyle.='Submitting as Policy Feedback<br>';
       foreach (split(/\,/,
      $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
        ) {
    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,$citations,$attachmenturl,%to)=@_;
     my $status='';
     my $sendsomething=0;
     foreach (keys %to) {
       if ($_) {
         my $declutter=&Apache::lonnet::declutter($feedurl);
         unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
                  'Feedback ['.$declutter.']',$email,$citations,$feedurl,
                   $attachmenturl)=~/ok/) {
    $status.='<br>Error sending message to '.$_.'<br>';
         } else {
    $sendsomething++;
         }
       }
     }
   
       my %record=&Apache::lonnet::restore('_feedback');
       my ($temp)=keys %record;
       unless ($temp=~/^error\:/) {
          my %newrecord=();
          $newrecord{'resource'}=$feedurl;
          $newrecord{'subnumber'}=$record{'subnumber'}+1;
          unless (&Apache::lonnet::cstore(\%newrecord,'_feedback') eq 'ok') {
      $status.='<br>Not registered<br>';
          }
       }
          
     return ($status,$sendsomething);
   }
   
   sub adddiscuss {
       my ($symb,$email,$anon,$attachmenturl)=@_;
       my $status='';
       if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'}.
           ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
   
       my %contrib=('message'      => $email,
                    'sendername'   => $ENV{'user.name'},
                    'senderdomain' => $ENV{'user.domain'},
                    'screenname'   => $ENV{'environment.screenname'},
                    'plainname'    => $ENV{'environment.firstname'}.' '.
                      $ENV{'environment.middlename'}.' '.
                                      $ENV{'environment.lastname'}.' '.
                                      $ENV{'enrironment.generation'},
                    'attachmenturl'=> $attachmenturl);
       if ($anon) {
    $contrib{'anonymous'}='true';
       }
       if (($symb) && ($email)) {
          $status='Adding to class discussion'.($anon?' (anonymous)':'').': '.
           &Apache::lonnet::store(\%contrib,$symb,$ENV{'request.course.id'},
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
           my %storenewentry=($symb => time);
           $status.='<br>Updating discussion time: '.
           &Apache::lonnet::put('discussiontimes',\%storenewentry,
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
       }
       my %record=&Apache::lonnet::restore('_discussion');
       my ($temp)=keys %record;
       unless ($temp=~/^error\:/) {
          my %newrecord=();
          $newrecord{'resource'}=$symb;
          $newrecord{'subnumber'}=$record{'subnumber'}+1;
          $status.='<br>Registering: '.
                  &Apache::lonnet::cstore(\%newrecord,'_discussion');
       }
       } else {
    $status.='Failed.';
       }
       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) {
        $r->content_type('text/html');
        $r->send_http_header;
        return OK;
     }
   
   # --------------------------- Get query string for limited number of parameters
   
      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                ['hide','unhide','deldisc','postdata','preview']);
   
     if (($ENV{'form.hide'}) || ($ENV{'form.unhide'})) {
   # ----------------------------------------------------------------- Hide/unhide
       $r->content_type('text/html');
       $r->send_http_header;
   
       my $entry=$ENV{'form.hide'}?$ENV{'form.hide'}:$ENV{'form.unhide'};
   
       my ($symb,$idx)=split(/\:\:\:/,$entry);
       my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
   
       my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
   
           
       my $currenthidden=$contrib{'hidden'};
       
       if ($ENV{'form.hide'}) {
    $currenthidden.='.'.$idx.'.';
       } else {
           $currenthidden=~s/\.$idx\.//g;
       }
       my %newhash=('hidden' => $currenthidden);
   
       &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
   
       &redirect_back($r,&Apache::lonnet::clutter($url),
          'Changed discussion status<p>','0','0');
     } elsif ($ENV{'form.deldisc'}) {
   # --------------------------------------------------------------- Hide for good
       $r->content_type('text/html');
       $r->send_http_header;
   
       my $entry=$ENV{'form.deldisc'};
   
       my ($symb,$idx)=split(/\:\:\:/,$entry);
       my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
   
       my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
   
           
       my $currentdeleted=$contrib{'deleted'};
       
       $currentdeleted.='.'.$idx.'.';
   
       my %newhash=('deleted' => $currentdeleted);
   
       &Apache::lonnet::store(\%newhash,$symb,$ENV{'request.course.id'},
                        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
   
       &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'};
     $feedurl=~s/^http\:\/\///;
     $feedurl=~s/^$ENV{'SERVER_NAME'}//;
     $feedurl=~s/^$ENV{'HTTP_HOST'}//;
   
     my $symb=&Apache::lonnet::symbread($feedurl);
     unless ($symb) {
         $symb=$ENV{'form.symb'};
         if ($symb) {
     my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
             $feedurl=&Apache::lonnet::clutter($url);
         }
     }
     my $goahead=1;
     if ($feedurl=~/\.(problem|exam|quiz|assess|survey|form)$/) {
         unless ($symb) { $goahead=0; }
     }
   
     if ($goahead) {
   # Go ahead with feedback, no ambiguous reference
       $r->content_type('text/html');
       $r->send_http_header;
     
       if (
         (
          ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
         ) 
         || 
         ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
         ||
         ($ENV{'request.course.id'} && ($symb=~/^bulletin\_\_\_/))
        ) {
   # --------------------------------------------------- Print login screen header
       unless ($ENV{'form.sendit'}) {
         my $options=&screen_header($feedurl);
         if ($options) {
    &mail_screen($r,$feedurl,$options);
         } else {
    &fail_redirect($r,$feedurl);
         }
       } else {
         
   # Get previous user input
         my $prevattempts=&Apache::loncommon::get_previous_attempt(
               $symb,$ENV{'user.name'},$ENV{'user.domain'},
               $ENV{'request.course.id'});
   
   # Get output from resource
         my $usersaw=&resource_output($feedurl);
   
   # Get resource answer (need to allow student to view grades for this to work)
         &Apache::lonnet::appenv(('allowed.vgr'=>'F'));
         my $useranswer=&Apache::loncommon::get_student_answers(
                          $symb,$ENV{'user.name'},$ENV{'user.domain'},
          $ENV{'request.course.id'});
         &Apache::lonnet::delenv('allowed.vgr');
   # Get attachments, if any, and not too large
         my $attachmenturl='';
         if ($ENV{'form.attachment.filename'}) {
     unless (length($ENV{'form.attachment'})>131072) {
         $attachmenturl=&Apache::lonnet::userfileupload('attachment');
     }
         }
   # Filter HTML out of message (could be nasty)
         my $message=&clear_out_html($ENV{'form.comment'});
   
   # Assemble email
         my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
             $usersaw,$useranswer);
    
   # Who gets this?
         my ($typestyle,%to) = &decide_receiver($feedurl);
   
   # Actually send mail
         my ($status,$numsent)=&send_msg($feedurl,$email,$citations,
             $attachmenturl,%to);
   
   # Discussion? Store that.
   
         my $numpost=0;
         if ($ENV{'form.discuss'}) {
     $typestyle.=&adddiscuss($symb,$message,0,$attachmenturl);
     $numpost++;
         }
   
         if ($ENV{'form.anondiscuss'}) {
     $typestyle.=&adddiscuss($symb,$message,1,$attachmenturl);
     $numpost++;
         }
   
   
   # Receipt screen and redirect back to where came from
         &redirect_back($r,$feedurl,$typestyle,$numsent,$numpost,$status);
   
       }
      } else {
   # Unable to give feedback
       &no_redirect_back($r,$feedurl);
      }
     } else {
   # Ambiguous Problem Resource
         if ( &Apache::lonnet::mod_perl_version() == 2 ) {
     &Apache::lonnet::cleanenv();
         }
         $r->internal_redirect('/adm/ambiguous');
     }
   }
     return OK;
 }   } 
   
 1;  1;
Removed from v.1.1  
changed lines
  Added in v.1.60

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