--- loncom/interface/lonfeedback.pm	2001/02/09 21:17:48	1.6
+++ loncom/interface/lonfeedback.pm	2002/03/02 03:50:27	1.24
@@ -1,6 +1,30 @@
 # The LearningOnline Network
 # Feedback
 #
+# $Id: lonfeedback.pm,v 1.24 2002/03/02 03:50:27 harris41 Exp $
+#
+# 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
 #
 # (Login Screen
@@ -10,12 +34,22 @@
 # 3/1/1 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;
 
 use strict;
 use Apache::Constants qw(:common);
 use Apache::lonmsg();
+use Apache::loncommon();
 
 sub mail_screen {
   my ($r,$feedurl,$options) = @_;
@@ -23,29 +57,40 @@ sub mail_screen {
 <html>
 <head>
 <title>The LearningOnline Network with CAPA</title>
+<meta http-equiv="pragma" content="no-cache"></meta>
 <script>
     function gosubmit() {
         var rec=0;
-        if (document.mailform.elements.author!=undefined) {
+        if (typeof(document.mailform.elements.author)!="undefined") {
           if (document.mailform.elements.author.checked) {
              rec=1;
           } 
         }
-        if (document.mailform.elements.question!=undefined) {
+        if (typeof(document.mailform.elements.question)!="undefined") {
           if (document.mailform.elements.question.checked) {
              rec=1;
           } 
         }
-        if (document.mailform.elements.course!=undefined) {
+        if (typeof(document.mailform.elements.course)!="undefined") {
           if (document.mailform.elements.course.checked) {
              rec=1;
           } 
         }
-        if (document.mailform.elements.policy!=undefined) {
+        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();
@@ -64,7 +109,7 @@ sub mail_screen {
 Please check at least one of the following feedback types:
 $options<hr>
 My question/comment/feedback:<p>
-<textarea name=comment cols=60 rows=10>
+<textarea name=comment cols=60 rows=10 wrap=hard>
 </textarea><p>
 <input type=hidden name=sendit value=1>
 <input type=button value="Send Feedback" onClick='gosubmit();'></input>
@@ -78,11 +123,13 @@ sub fail_redirect {
   my ($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>
 <html>
 <body bgcolor="#FFFFFF">
-Sorry, no recipients  ...
+<img align=right src=/adm/lonIcons/lonlogos.gif>
+<b>Sorry, no recipients  ...</b>
 </body>
 </html>
 ENDFAILREDIR
@@ -93,10 +140,12 @@ sub redirect_back {
   $r->print (<<ENDREDIR);
 <head>
 <title>Feedback sent</title>
+<meta http-equiv="pragma" content="no-cache"></meta>
 <meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
 </head>
 <html>
 <body bgcolor="#FFFFFF">
+<img align=right src=/adm/lonIcons/lonlogos.gif>
 $typestyle
 <b>Sent $sendsomething message(s).</b>
 <font color=red>$status</font>
@@ -109,14 +158,22 @@ sub no_redirect_back {
   my ($r,$feedurl) = @_;
   $r->print (<<ENDNOREDIR);
 <head><title>Feedback not sent</title>
-<meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
+<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">
-Sorry, no feedback possible on this resource  ...
+<img align=right src=/adm/lonIcons/lonlogos.gif>
+<b>Sorry, no feedback possible on this resource  ...</b>
 </body>
 </html>
-ENDNOREDIR
+ENDNOREDIRTWO
 }
 
 sub screen_header {
@@ -128,7 +185,7 @@ sub screen_header {
   }
   if ($ENV{'course.'.$ENV{'request.course.id'}.'.question.email'}) {
     $options.=
-      '<br><input type=checkbox name=question> Question about resource content';
+    '<br><input type=checkbox name=question> Question about resource content';
   }
   if ($ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}) {
     $options.=
@@ -140,48 +197,19 @@ sub screen_header {
       '<br><input type=checkbox name=policy> '.
 	'Question/Comment/Feedback about course policy';
   }
-  return $options;
-}
 
-sub get_previous_attempt {
-  my ($feedurl)=@_;
-  my $symb=&Apache::lonnet::symbread($feedurl);
-  my $prevattempts='';
-  if ($symb) {
-    my $answer=&Apache::lonnet::reply(
-				      "restore:".$ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.
-				      $ENV{'request.course.id'}.':'.
-				      &Apache::lonnet::escape($symb),
-				      $ENV{'user.home'});
-    my %returnhash=();
-    map {
-      my ($name,$value)=split(/\=/,$_);
-      $returnhash{&Apache::lonnet::unescape($name)}=
-	&Apache::lonnet::unescape($value);
-    } split(/\&/,$answer);
-    my %lasthash=();
-    my $version;
-    for ($version=1;$version<=$returnhash{'version'};$version++) {
-      map {
-	$lasthash{$_}=$returnhash{$version.':'.$_};
-      } split(/\:/,$returnhash{$version.':keys'});
-    }
-    $prevattempts='<table border=2></tr><th>History</th>';
-    map {
-      $prevattempts.='<th>'.$_.'</th>';
-    } keys %lasthash;
-    for ($version=1;$version<=$returnhash{'version'};$version++) {
-      $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
-      map {
-	$prevattempts.='<td>'.$returnhash{$version.':'.$_}.'</td>';   
-      } keys %lasthash;
-    }
-    $prevattempts.='</tr><tr><th>Current</th>';
-    map {
-      $prevattempts.='<td>'.$lasthash{$_}.'</td>';
-    } keys %lasthash;
-    $prevattempts.='</tr></table>';
+  if ($ENV{'request.course.id'}) {
+      if (&Apache::lonnet::allowed('pch',
+        $ENV{'request.course.id'}.
+        ($ENV{'request.course.sec'}?'/'.$ENV{'request.course.sec'}:''))) {
+    $options.='<br><input type=checkbox name=discuss> '.
+	'<b>Contribution to course discussion of resource</b>';
+    $options.='<br><input type=checkbox name=anondiscuss> '.
+	'<b>Anonymous contribution to course discussion of resource</b>'.
+        ' (name only visible to course faculty)';
+      }
   }
+  return $options;
 }
 
 sub resource_output {
@@ -226,30 +254,33 @@ sub decide_receiver {
   my $typestyle='';
   my %to=();
   if ($ENV{'form.author'}) {
-    $typestyle.='Author Feedback<br>';
+    $typestyle.='Submitting as Author Feedback<br>';
     $feedurl=~/^\/res\/(\w+)\/(\w+)\//;
     $to{$2.':'.$1}=1;
   }
   if ($ENV{'form.question'}) {
-    $typestyle.='Question<br>';
-    map {
+    $typestyle.='Submitting as Question<br>';
+    foreach (split(/\,/,
+		   $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'})
+	     ) {
       $to{$_}=1;
-    } split(/\,/,
-	    $ENV{'course.'.$ENV{'request.course.id'}.'.question.email'});
+    } 
   }
   if ($ENV{'form.course'}) {
-    $typestyle.='Comment<br>';
-    map {
+    $typestyle.='Submitting as Comment<br>';
+    foreach (split(/\,/,
+		   $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'})
+	     ) {
       $to{$_}=1;
-    } split(/\,/,
-	    $ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'});
+    } 
   }
   if ($ENV{'form.policy'}) {
-    $typestyle.='Policy<br>';
-    map {
+    $typestyle.='Submitting as Policy Feedback<br>';
+    foreach (split(/\,/,
+		   $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'})
+	     ) {
       $to{$_}=1;
-    } split(/\,/,
-	    $ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'});
+    } 
   }
   return ($typestyle,%to);
 }
@@ -258,33 +289,147 @@ sub send_msg {
   my ($feedurl,$email,$citations,%to)=@_;
   my $status='';
   my $sendsomething=0;
-  map {
+  foreach (keys %to) {
     if ($_) {
-      unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),'Feedback '.$feedurl,
-					       $email,$citations) eq 'ok') {
+      my $declutter=&Apache::lonnet::declutter($feedurl);
+      unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),
+               'Feedback ['.$declutter.']',$email,$citations) eq 'ok') {
 	$status.='<br>Error sending message to '.$_.'<br>';
       } else {
-	#$status.='<br>Message sent to '.$_.'<br>';
 	$sendsomething++;
       }
     }
-  } keys %to;       
+  }
+
+    my %record=&Apache::lonnet::restore('_feedback');
+    my ($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)=@_;
+    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' => $ENV{'user.domain'});
+    if ($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>';   
+}
+
 sub handler {
   my $r = shift;
-  $r->content_type('text/html');
-  $r->send_http_header;
-  return OK if $r->header_only;
-  
+  if ($r->header_only) {
+     $r->content_type('text/html');
+     $r->send_http_header;
+     return OK;
+  }
+
+# --------------------------- Get query string for limited number of parameters
+
+    foreach (split(/&/,$ENV{'QUERY_STRING'})) {
+       my ($name, $value) = split(/=/,$_);
+       $value =~ tr/+/ /;
+       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+       if (($name eq 'hide') || ($name eq 'unhide')) {
+           unless ($ENV{'form.'.$name}) {
+              $ENV{'form.'.$name}=$value;
+	   }
+       }
+    }
+
+  if (($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)=split(/\_\_\_/,$symb);
+
+    my %contrib=&Apache::lonnet::restore($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($r,'/res/'.$url,'Changed discussion status<p>','0');
+
+      
+  } 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);
+  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 ((($feedurl=~/^\/res/) && ($feedurl!~/^\/res\/adm/)) 
-      || ($ENV{'request.course.id'})) {
+    if (
+      (
+       ($feedurl=~m:^/res:) && ($feedurl!~m:^/res/adm:)
+      ) 
+      || 
+      ($ENV{'request.course.id'} && ($feedurl!~m:^/adm:))
+     ) {
 # --------------------------------------------------- Print login screen header
     unless ($ENV{'form.sendit'}) {
       my $options=&screen_header($feedurl);
@@ -296,7 +441,9 @@ sub handler {
     } else {
       
 # Get previous user input
-      my $prevattempts=&get_previous_attempt($feedurl);
+      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);
@@ -305,7 +452,8 @@ sub handler {
       my $message=&clear_out_html;
 
 # Assemble email
-      my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,$usersaw);
+      my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
+          $usersaw);
 
 # Who gets this?
       my ($typestyle,%to) = &decide_receiver($feedurl);
@@ -313,13 +461,30 @@ sub handler {
 # Actually send mail
       my ($status,$numsent)=&send_msg($feedurl,$email,$citations,%to);
 
+# Discussion? Store that.
+
+      if ($ENV{'form.discuss'}) {
+	  $typestyle.=&adddiscuss($symb,$message);
+      }
+
+      if ($ENV{'form.anondiscuss'}) {
+	  $typestyle.=&adddiscuss($symb,$message,1);
+      }
+
+
 # Receipt screen and redirect back to where came from
-      &redirect_back($r,$feedurl,$typestyle,$status,$numsent);
+      &redirect_back($r,$feedurl,$typestyle,$numsent,$status);
 
     }
-  } else {
+   } else {
+# Unable to give feedback
     &no_redirect_back($r,$feedurl);
+   }
+  } else {
+# Ambiguous Problem Resource
+    $r->internal_redirect('/adm/ambiguous');
   }
+}
   return OK;
 } 
 
@@ -328,3 +493,4 @@ __END__
 
 
 
+
