# The LearningOnline Network
# Feedback
#
# (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
#
package Apache::lonfeedback;
use strict;
use Apache::Constants qw(:common);
use Apache::lonmsg();
sub mail_screen {
my ($r,$feedurl,$options) = @_;
$r->print(<<ENDDOCUMENT);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
<script>
function gosubmit() {
var rec=0;
if (document.mailform.elements.author!=undefined) {
if (document.mailform.elements.author.checked) {
rec=1;
}
}
if (document.mailform.elements.question!=undefined) {
if (document.mailform.elements.question.checked) {
rec=1;
}
}
if (document.mailform.elements.course!=undefined) {
if (document.mailform.elements.course.checked) {
rec=1;
}
}
if (document.mailform.elements.policy!=undefined) {
if (document.mailform.elements.policy.checked) {
rec=1;
}
}
if (rec) {
document.mailform.submit();
} else {
alert('Please check a feedback type.');
}
}
</script>
</head>
<body bgcolor="#FFFFFF" onLoad="window.focus();">
<img align=right src=/adm/lonIcons/lonlogos.gif>
<h1>Feedback</h1>
<h2><tt>$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:
$options<hr>
My question/comment/feedback:<p>
<textarea name=comment cols=60 rows=10>
</textarea><p>
<input type=hidden name=sendit value=1>
<input type=button value="Send Feedback" onClick='gosubmit();'></input>
</form>
</body>
</html>
ENDDOCUMENT
}
sub fail_redirect {
my ($r,$feedurl) = @_;
$r->print (<<ENDFAILREDIR);
<head><title>Feedback not sent</title>
<meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
</head>
<html>
<body bgcolor="#FFFFFF">
Sorry, no recipients ...
</body>
</html>
ENDFAILREDIR
}
sub redirect_back {
my ($r,$feedurl,$typestyle,$sendsomething,$status) = @_;
$r->print (<<ENDREDIR);
<head>
<title>Feedback sent</title>
<meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
</head>
<html>
<body bgcolor="#FFFFFF">
$typestyle
<b>Sent $sendsomething message(s).</b>
<font color=red>$status</font>
</body>
</html>
ENDREDIR
}
sub no_redirect_back {
my ($r,$feedurl) = @_;
$r->print (<<ENDNOREDIR);
<head><title>Feedback not sent</title>
<meta HTTP-EQUIV="Refresh" CONTENT="2; url=$feedurl">
</head>
<html>
<body bgcolor="#FFFFFF">
Sorry, no feedback possible on this resource ...
</body>
</html>
ENDNOREDIR
}
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';
}
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;
$prevattempts.='</tr></table>';
}
}
sub resource_output {
my ($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.='Author Feedback<br>';
$feedurl=~/^\/res\/(\w+)\/(\w+)\//;
$to{$2.':'.$1}=1;
}
if ($ENV{'form.question'}) {
$typestyle.='Question<br>';
map {
$to{$_}=1;
} split(/\,/,
$ENV{'course.'.$ENV{'request.course.id'}.'.question.email'});
}
if ($ENV{'form.course'}) {
$typestyle.='Comment<br>';
map {
$to{$_}=1;
} split(/\,/,
$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'});
}
if ($ENV{'form.policy'}) {
$typestyle.='Policy<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 $sendsomething=0;
map {
if ($_) {
unless (&Apache::lonmsg::user_normal_msg(split(/\:/,$_),'Feedback '.$feedurl,
$email,$citations) eq 'ok') {
$status.='<br>Error sending message to '.$_.'<br>';
} else {
#$status.='<br>Message sent to '.$_.'<br>';
$sendsomething++;
}
}
} keys %to;
return ($status,$sendsomething);
}
sub handler {
my $r = shift;
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
my $feedurl=$ENV{'form.postdata'};
$feedurl=~s/^http\:\/\///;
$feedurl=~s/^$ENV{'SERVER_NAME'}//;
$feedurl=~s/^$ENV{'HTTP_HOST'}//;
if ((($feedurl=~/^\/res/) && ($feedurl!~/^\/res\/adm/))
|| ($ENV{'request.course.id'})) {
# --------------------------------------------------- Print login screen header
unless ($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 $prevattempts=&get_previous_attempt($feedurl);
# 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);
# Receipt screen and redirect back to where came from
&redirect_back($r,$feedurl,$typestyle,$status,$numsent);
}
} else {
&no_redirect_back($r,$feedurl);
}
return OK;
}
1;
__END__
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