# The LearningOnline Network
# Feedback
#
# $Id: lonfeedback.pm,v 1.22 2002/01/01 16:39:32 www 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
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
#
# 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 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) = @_;
$r->print(<<ENDDOCUMENT);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
<meta http-equiv="pragma" content="no-cache"></meta>
<script>
function gosubmit() {
var rec=0;
if (typeof(document.mailform.elements.author)!="undefined") {
if (document.mailform.elements.author.checked) {
rec=1;
}
}
if (typeof(document.mailform.elements.question)!="undefined") {
if (document.mailform.elements.question.checked) {
rec=1;
}
}
if (typeof(document.mailform.elements.course)!="undefined") {
if (document.mailform.elements.course.checked) {
rec=1;
}
}
if (typeof(document.mailform.elements.policy)!="undefined") {
if (document.mailform.elements.policy.checked) {
rec=1;
}
}
if (typeof(document.mailform.elements.discuss)!="undefined") {
if (document.mailform.elements.discuss.checked) {
rec=1;
}
}
if (typeof(document.mailform.elements.anondiscuss)!="undefined") {
if (document.mailform.elements.anondiscuss.checked) {
rec=1;
}
}
if (rec) {
document.mailform.submit();
} else {
alert('Please check a feedback type.');
}
}
</script>
</head>
<body bgcolor="#FFFFFF" onLoad="window.focus();">
<img align=right src=/adm/lonIcons/lonlogos.gif>
<h1>Feedback</h1>
<h2><tt>$feedurl</tt></h2>
<form action="/adm/feedback" method=post name=mailform>
<input type=hidden name=postdata value="$feedurl">
Please check at least one of the following feedback types:
$options<hr>
My question/comment/feedback:<p>
<textarea name=comment cols=60 rows=10 wrap=hard>
</textarea><p>
<input type=hidden name=sendit value=1>
<input type=button value="Send Feedback" onClick='gosubmit();'></input>
</form>
</body>
</html>
ENDDOCUMENT
}
sub fail_redirect {
my ($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">
<img align=right src=/adm/lonIcons/lonlogos.gif>
<b>Sorry, no recipients ...</b>
</body>
</html>
ENDFAILREDIR
}
sub redirect_back {
my ($r,$feedurl,$typestyle,$sendsomething,$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">
<img align=right src=/adm/lonIcons/lonlogos.gif>
$typestyle
<b>Sent $sendsomething message(s).</b>
<font color=red>$status</font>
</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.'">');
}
$r->print (<<ENDNOREDIRTWO);
</head>
<html>
<body bgcolor="#FFFFFF">
<img align=right src=/adm/lonIcons/lonlogos.gif>
<b>Sorry, no feedback possible on this resource ...</b>
</body>
</html>
ENDNOREDIRTWO
}
sub screen_header {
my ($feedurl) = @_;
my $options='';
if (($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'}) {
$options.=
'<br><input type=checkbox name=question> Question about resource content';
}
if ($ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}) {
$options.=
'<br><input type=checkbox name=course> '.
'Question/Comment/Feedback about course content';
}
if ($ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'}) {
$options.=
'<br><input type=checkbox name=policy> '.
'Question/Comment/Feedback about course policy';
}
if ($ENV{'request.course.id'}) {
if (&Apache::lonnet::allowed('pch',$ENV{'request.course.id'})) {
$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 $options;
}
sub resource_output {
my ($feedurl) = @_;
my $usersaw=&Apache::lonnet::ssi($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 $message=$ENV{'form.comment'};
$message=~s/\</\<\;/g;
$message=~s/\>/\>\;/g;
return $message;
}
sub assemble_email {
my ($feedurl,$message,$prevattempts,$usersaw)=@_;
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>
$usersaw
ENDCITE
return ($email,$citations);
}
sub decide_receiver {
my ($feedurl) = @_;
my $typestyle='';
my %to=();
if ($ENV{'form.author'}) {
$typestyle.='Submitting as Author Feedback<br>';
$feedurl=~/^\/res\/(\w+)\/(\w+)\//;
$to{$2.':'.$1}=1;
}
if ($ENV{'form.question'}) {
$typestyle.='Submitting as Question<br>';
map {
$to{$_}=1;
} split(/\,/,
$ENV{'course.'.$ENV{'request.course.id'}.'.question.email'});
}
if ($ENV{'form.course'}) {
$typestyle.='Submitting as Comment<br>';
map {
$to{$_}=1;
} split(/\,/,
$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'});
}
if ($ENV{'form.policy'}) {
$typestyle.='Submitting as Policy Feedback<br>';
map {
$to{$_}=1;
} split(/\,/,
$ENV{'course.'.$ENV{'request.course.id'}.'.policy.email'});
}
return ($typestyle,%to);
}
sub send_msg {
my ($feedurl,$email,$citations,%to)=@_;
my $status='';
my $sendsomething=0;
map {
if ($_) {
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 {
$sendsomething++;
}
}
} keys %to;
my %record=&Apache::lonnet::restore('_feedback');
my ($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'})) {
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 $r = shift;
if ($r->header_only) {
$r->content_type('text/html');
$r->send_http_header;
return OK;
}
# --------------------------- Get query string for limited number of parameters
map {
my ($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}=$value;
}
}
} (split(/&/,$ENV{'QUERY_STRING'}));
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=~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);
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);
# Filter HTML out of message (could be nasty)
my $message=&clear_out_html;
# Assemble email
my ($email,$citations)=&assemble_email($feedurl,$message,$prevattempts,
$usersaw);
# Who gets this?
my ($typestyle,%to) = &decide_receiver($feedurl);
# Actually send mail
my ($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,$numsent,$status);
}
} else {
# Unable to give feedback
&no_redirect_back($r,$feedurl);
}
} else {
# Ambiguous Problem Resource
$r->internal_redirect('/adm/ambiguous');
}
}
return OK;
}
1;
__END__
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