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Diff for /loncom/homework/lonhomework.pm between versions 1.149 and 1.214

version 1.149, 2003/09/19 14:11:11	version 1.214, 2005/07/14 02:40:10
Line 24	Line 24
# /home/httpd/html/adm/gpl.txt	# /home/httpd/html/adm/gpl.txt
#	#
# http://www.lon-capa.org/	# http://www.lon-capa.org/
#
# Guy Albertelli
# 11/30 Gerd Kortemeyer
# 6/1,8/17,8/18 Gerd Kortemeyer
# 7/18 Jeremy Bowers

package Apache::lonhomework;	package Apache::lonhomework;
use strict;	use strict;
use Apache::style();	use Apache::style();
use Apache::lonxml();	use Apache::lonxml();
use Apache::lonnet();	use Apache::lonnet;
use Apache::lonplot();	use Apache::lonplot();
use Apache::inputtags();	use Apache::inputtags();
use Apache::structuretags();	use Apache::structuretags();
Line 51 use Apache::externalresponse();	Line 47 use Apache::externalresponse();
use Apache::rankresponse();	use Apache::rankresponse();
use Apache::matchresponse();	use Apache::matchresponse();
use Apache::chemresponse();	use Apache::chemresponse();
	use Apache::drawimage();
use Apache::Constants qw(:common);	use Apache::Constants qw(:common);
use HTML::Entities();	use HTML::Entities();
use Apache::loncommon();	use Apache::loncommon();
use Apache::lonlocal;	use Apache::lonlocal;
#use Time::HiRes qw( gettimeofday tv_interval );	use Time::HiRes qw( gettimeofday tv_interval );
	use Apache::lonnet();

	# FIXME - improve commenting


BEGIN {	BEGIN {
&Apache::lonxml::register_insert();	&Apache::lonxml::register_insert();
}	}


	#
	# Decides what targets to render for.
	# Implicit inputs:
	# Various session environment variables:
	# request.state - published - is a /res/ resource
	# uploaded - is a /uploaded/ resource
	# contruct - is a /priv/ resource
	# form.grade_target - a form parameter requesting a specific target
sub get_target {	sub get_target {
if (($ENV{'request.state'} eq "published") \|\|	&Apache::lonxml::debug("request.state = $env{'request.state'}");
($ENV{'request.state'} eq "uploaded")) {	if( defined($env{'form.grade_target'})) {
if ( defined($ENV{'form.grade_target'} )	&Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
&& ($ENV{'form.grade_target'} eq 'tex')) {	} else {
return ($ENV{'form.grade_target'});	&Apache::lonxml::debug("form.grade_target <undefined>");
} elsif ( defined($ENV{'form.grade_target'} )	}
	if (($env{'request.state'} eq "published") \|\|
	($env{'request.state'} eq "uploaded")) {
	if ( defined($env{'form.grade_target'} )
	&& ($env{'form.grade_target'} eq 'tex')) {
	return ($env{'form.grade_target'});
	} elsif ( defined($env{'form.grade_target'} )
&& ($Apache::lonhomework::viewgrades eq 'F' )) {	&& ($Apache::lonhomework::viewgrades eq 'F' )) {
return ($ENV{'form.grade_target'});	return ($env{'form.grade_target'});
}	}
	if ($env{'form.webgrade'} &&
if ( defined($ENV{'form.submitted'}) &&	$Apache::lonhomework::modifygrades eq 'F') {
( !defined($ENV{'form.resetdata'})) &&	return ('grade','webgrade');
( !defined($ENV{'form.newrandomization'}))) {	}
	if ( defined($env{'form.submitted'}) &&
	( !defined($env{'form.resetdata'})) &&
	( !defined($env{'form.newrandomization'}))) {
return ('grade', 'web');	return ('grade', 'web');
} else {	} else {
return ('web');	return ('web');
}	}
} elsif ($ENV{'request.state'} eq "construct") {	} elsif ($env{'request.state'} eq "construct") {
if ( defined($ENV{'form.grade_target'}) ) {	if ( defined($env{'form.grade_target'}) ) {
return ($ENV{'form.grade_target'});	return ($env{'form.grade_target'});
}	}
if ( defined($ENV{'form.preview'})) {	if ( defined($env{'form.preview'})) {
if ( defined($ENV{'form.submitted'})) {	if ( defined($env{'form.submitted'})) {
return ('grade', 'web');	return ('grade', 'web');
} else {	} else {
return ('web');	return ('web');
}	}
} else {	} else {
if ( $ENV{'form.problemmode'} eq 'View' \|\|	if ( $env{'form.problemmode'} eq &mt('View') \|\|
$ENV{'form.problemmode'} eq 'Discard Edits and View') {	$env{'form.problemmode'} eq &mt('Discard Edits and View')) {
if ( defined($ENV{'form.submitted'}) &&	if ( defined($env{'form.submitted'}) &&
(!defined($ENV{'form.resetdata'})) &&	(!defined($env{'form.resetdata'})) &&
(!defined($ENV{'form.newrandomization'}))) {	(!defined($env{'form.newrandomization'}))) {
return ('grade', 'web','answer');	return ('grade', 'web','answer');
} else {	} else {
return ('web','answer');	return ('web','answer');
}	}
} elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {	} elsif ( $env{'form.problemmode'} eq &mt('Edit') \|\|
if ( $ENV{'form.submitted'} eq 'edit' ) {	$env{'form.problemmode'} eq 'Edit') {
if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {	if ( $env{'form.submitted'} eq 'edit' ) {
	if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
return ('modified','web','answer');	return ('modified','web','answer');
} else {	} else {
return ('modified','edit');	return ('modified','no_output_web','edit');
}	}
} else {	} else {
return ('edit');	return ('no_output_web','edit');
}	}
} else {	} else {
return ('web');	return ('web');
Line 126 sub setup_vars {	Line 146 sub setup_vars {
sub send_header {	sub send_header {
my ($request)= @_;	my ($request)= @_;
$request->print(&Apache::lontexconvert::header());	$request->print(&Apache::lontexconvert::header());
# $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');	# $request->print('<form name='.$env{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
}	}

sub createmenu {	sub createmenu {
Line 145 sub send_footer {	Line 165 sub send_footer {
$request->print(&Apache::lontexconvert::footer());	$request->print(&Apache::lontexconvert::footer());
}	}

	sub proctor_checked_in {
	my ($slot_name,$slot)=@_;
	my @allowed=split(",",$slot->{'proctor'});
	my $version=$Apache::lonhomework::history{'resource.version'};
	foreach my $possible (@allowed) {
	if ($Apache::lonhomework::history{"resource.$version.checkedin"} eq
	$possible &&
	$Apache::lonhomework::history{"resource.$version.checkedin.slot"}
	eq $slot_name) {
	return 1;
	}
	}
	return 0;
	}

$Apache::lonxml::browse='';	$Apache::lonxml::browse='';
	sub check_ip_acc {
	my ($acc)=@_;
	if (!defined($acc) \|\| $acc =~ /^\s*$/) { return 1; }
	my $allowed=0;
	my $ip=$ENV{'REMOTE_ADDR'};
	my $name;
	foreach my $pattern (split(',',$acc)) {
	if ($pattern =~ /\*$/) {
	#35.8.*
	$pattern=~s/\*//;
	if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
	#35.8.3.[34-56]
	my $low=$2;
	my $high=$3;
	$pattern=$1;
	if ($ip =~ /^\Q$pattern\E/) {
	my $last=(split(/\./,$ip))[3];
	if ($last <=$high && $last >=$low) { $allowed=1; }
	}
	} elsif ($pattern =~ /^\*/) {
	#*.msu.edu
	$pattern=~s/\*//;
	if (!defined($name)) {
	use Socket;
	my $netaddr=inet_aton($ip);
	($name)=gethostbyaddr($netaddr,AF_INET);
	}
	if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
	#127.0.0.1
	if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
	} else {
	#some.name.com
	if (!defined($name)) {
	use Socket;
	my $netaddr=inet_aton($ip);
	($name)=gethostbyaddr($netaddr,AF_INET);
	}
	if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
	}
	if ($allowed) { last; }
	}
	return $allowed;
	}

	sub check_task_access {
	# does it pass normal muster
	# yes we really do want the default args passing
	my ($status,$datemsg)=&check_access;
	if ($status eq 'SHOW_ANSWER' \|\|
	$status eq 'CLOSED' \|\|
	$status eq 'CANNOT_ANSWER' \|\|
	$status eq 'INVALID_ACCESS' \|\|
	$status eq 'UNAVAILABLE') {
	return ($status,$datemsg);
	}
	if ($env{'request.state'} eq "construct") {
	return ($status,$datemsg);
	}
	my $version=$Apache::lonhomework::history{'resource.version'};
	if ($Apache::lonhomework::history{"resource.$version.checkedin"} &&
	$Apache::lonhomework::history{"resource.$version.status"} eq 'pass') {
	return ('SHOW_ANSWER');
	}
	my ($id)=@_;
	my @slots=
	(split(':',&Apache::lonnet::EXT("resource.$id.availablestudent")),
	split(':',&Apache::lonnet::EXT("resource.$id.available")));

	# if (!@slots) {
	# return ($status,$datemsg);
	# }
	my $slotstatus='NOT_IN_A_SLOT';
	my ($returned_slot,$slot_name);
	foreach my $slot (@slots) {
	&Apache::lonxml::debug("getting $slot");
	my %slot=&Apache::lonnet::get_slot($slot);
	&Apache::lonhomework::showhash(%slot);
	if ($slot{'starttime'} < time &&
	$slot{'endtime'} > time &&
	&check_ip_acc($slot{'ip'})) {
	&Apache::lonxml::debug("$slot is good");
	$slotstatus='NEEDS_CHECKIN';
	$returned_slot=\%slot;
	$slot_name=$slot;
	last;
	}
	}
	if ($slotstatus eq 'NEEDS_CHECKIN' &&
	&proctor_checked_in($slot_name,$returned_slot)) {
	&Apache::lonxml::debug("protoctor checked in");
	$slotstatus='CAN_ANSWER';
	}
	if ( $slotstatus eq 'NOT_IN_A_SLOT' &&
	$Apache::lonhomework::history{"resource.$version.checkedin"}) {
	if ($Apache::lonhomework::history{"resource.$version.status"} eq 'fail') {
	return ('SHOW_ANSWER');
	} else {
	return ('WAITING_FOR_GRADE');
	}
	}
	return ($slotstatus,$datemsg,$slot_name,$returned_slot);
	}

# JB, 9/24/2002: Any changes in this function may require a change	# JB, 9/24/2002: Any changes in this function may require a change
# in lonnavmaps::resource::getDateStatus.	# in lonnavmaps::resource::getDateStatus.
Line 159 sub check_access {	Line 298 sub check_access {
my $type;	my $type;
my $passed;	my $passed;

if ($ENV{'request.state'} eq "construct") {	if ($env{'request.state'} eq "construct") {
	if ($env{'form.problemstate'}) {
	if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
	if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
	lc($Apache::lonhomework::problemstatus) eq 'no')) {
	return ('CANNOT_ANSWER',
	&mt('is in this state due to author settings.'));
	}
	} else {
	return ($env{'form.problemstate'},
	&mt('is in this state due to author settings.'));
	}
	}
&Apache::lonxml::debug("in construction ignoring dates");	&Apache::lonxml::debug("in construction ignoring dates");
$status='CAN_ANSWER';	$status='CAN_ANSWER';
$datemsg=&mt('is in under construction');	$datemsg=&mt('is in under construction');
return ($status,$datemsg);	# return ($status,$datemsg);
}	}

&Apache::lonxml::debug("checking for part :$id:");	&Apache::lonxml::debug("checking for part :$id:");
&Apache::lonxml::debug("time:".time);	&Apache::lonxml::debug("time:".time);
foreach $temp ("opendate","duedate","answerdate") {
$lastdate = $date;	my ($symb)=&Apache::lonxml::whichuser();
$date = &Apache::lonnet::EXT("resource.$id.$temp");	&Apache::lonxml::debug("symb:".$symb);
my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");	#if ($env{'request.state'} ne "construct" && $symb ne '') {
if ($thistype =~ /^(con_lost\|no_such_host)/ \|\|	if ($env{'request.state'} ne "construct") {
$date =~ /^(con_lost\|no_such_host)/) {	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
$status='UNAVAILABLE';	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
$date=&mt("may open later.");	$status='INVALID_ACCESS';
	$date=&mt("can not be accessed from your location.");
return($status,$date);	return($status,$date);
}	}
if ($thistype eq 'date_interval') {
if ($temp eq 'opendate') {	foreach $temp ("opendate","duedate","answerdate") {
$date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;	$lastdate = $date;
}	$date = &Apache::lonnet::EXT("resource.$id.$temp");
if ($temp eq 'answerdate') {	my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
$date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;	if ($thistype =~ /^(con_lost\|no_such_host)/ \|\|
}	$date =~ /^(con_lost\|no_such_host)/) {
}	$status='UNAVAILABLE';
&Apache::lonxml::debug("found :$date: for :$temp:");	$date=&mt("may open later.");
if ($date eq '') {	return($status,$date);
$date = &mt("an unknown date"); $passed = 0;	}
} elsif ($date eq 'con_lost') {	if ($thistype eq 'date_interval') {
$date = &mt("an indeterminate date"); $passed = 0;	if ($temp eq 'opendate') {
} else {	$date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
if (time < $date) { $passed = 0; } else { $passed = 1; }	}
$date = localtime $date;	if ($temp eq 'answerdate') {
}	$date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
if (!$passed) { $type=$temp; last; }	}
}	}
&Apache::lonxml::debug("have :$type:$passed:");	&Apache::lonxml::debug("found :$date: for :$temp:");
if ($passed) {	if ($date eq '') {
$status='SHOW_ANSWER';	$date = &mt("an unknown date"); $passed = 0;
$datemsg=$date;	} elsif ($date eq 'con_lost') {
} elsif ($type eq 'opendate') {	$date = &mt("an indeterminate date"); $passed = 0;
$status='CLOSED';	} else {
$datemsg = &mt("will open on")." $date";	if (time < $date) { $passed = 0; } else { $passed = 1; }
} elsif ($type eq 'duedate') {	$date = localtime $date;
$status='CAN_ANSWER';	}
$datemsg = &mt("is due at")." $date";	if (!$passed) { $type=$temp; last; }
} elsif ($type eq 'answerdate') {	}
$status='CLOSED';	&Apache::lonxml::debug("have :$type:$passed:");
$datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";	if ($passed) {
	$status='SHOW_ANSWER';
	$datemsg=$date;
	} elsif ($type eq 'opendate') {
	$status='CLOSED';
	$datemsg = &mt("will open on")." $date";
	} elsif ($type eq 'duedate') {
	$status='CAN_ANSWER';
	$datemsg = &mt("is due at")." $date";
	} elsif ($type eq 'answerdate') {
	$status='CLOSED';
	$datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
	}
}	}
if ($status eq 'CAN_ANSWER') {	if ($status eq 'CAN_ANSWER' \|\|
	(($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
#check #tries, and if correct.	#check #tries, and if correct.
my $tries = $Apache::lonhomework::history{"resource.$id.tries"};	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
if ( $tries eq '' ) { $tries = '0'; }	if ( $tries eq '' ) { $tries = '0'; }
if ( $maxtries eq '' ) { $maxtries = '2'; }	if ( $maxtries eq '' &&
if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }	$env{'request.state'} ne 'construct') { $maxtries = '2'; }
	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
# if (correct and show prob status) or excused then CANNOT_ANSWER	# if (correct and show prob status) or excused then CANNOT_ANSWER
if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
&&	&&
Line 227 sub check_access {	Line 393 sub check_access {
$status = 'CANNOT_ANSWER';	$status = 'CANNOT_ANSWER';
}	}
}	}
	if ($status eq 'CAN_ANSWER' \|\| $status eq 'CANNOT_ANSWER') {
	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
	&Apache::lonxml::debug("looking for interval $interval");
	if ($interval) {
	my $first_access=&Apache::lonnet::get_first_access('map');
	&Apache::lonxml::debug("looking for accesstime $first_access");
	if (!$first_access) {
	$status='NOT_YET_VIEWED';
	$datemsg=&seconds_to_human_length($interval);
	} else {
	my $newdate=localtime($first_access+$interval);
	if (time > ($first_access+$interval)) {
	$status='CLOSED';
	$datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
	} else {
	$datemsg = &mt("is due at")." $newdate";
	}
	}
	}
	}
#if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&	#if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
# (!$Apache::lonhomework::history{"resource.0.outtoken"})) {	# (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
# return ('UNCHECKEDOUT','needs to be checked out');	# return ('UNCHECKEDOUT','needs to be checked out');
Line 244 sub check_access {	Line 429 sub check_access {
return ($status,$datemsg);	return ($status,$datemsg);
}	}

	sub seconds_to_human_length {
	my ($length)=@_;

	my $seconds=$length%60; $length=int($length/60);
	my $minutes=$length%60; $length=int($length/60);
	my $hours=$length%24; $length=int($length/24);
	my $days=$length;

	my $timestr;
	if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
	if ($hours > 0) { $timestr.=($timestr?", ":"").
	&mt('[quant,_1,hour]',$hours); }
	if ($minutes > 0) { $timestr.=($timestr?", ":"").
	&mt('[quant,_1,minute]',$minutes); }
	if ($seconds > 0) { $timestr.=($timestr?", ":"").
	&mt('[quant,_1,second]',$seconds); }
	return $timestr;
	}

sub showhash {	sub showhash {
my (%hash) = @_;	my (%hash) = @_;
&showhashsubset(\%hash,'.');	&showhashsubset(\%hash,'.');
Line 254 sub showarray {	Line 458 sub showarray {
my ($array)=@_;	my ($array)=@_;
my $string="(";	my $string="(";
foreach my $elm (@{ $array }) {	foreach my $elm (@{ $array }) {
if (ref($elm)) {	if (ref($elm) eq 'ARRAY') {
if ($elm =~ /ARRAY/ ) {	$string.=&showarray($elm);
$string.=&showarray($elm);	} elsif (ref($elm) eq 'HASH') {
}	$string.= "HASH --- \n<br />";
	$string.= &showhashsubset($elm,'.');
} else {	} else {
$string.="$elm,"	$string.="$elm,"
}	}
Line 271 sub showhashsubset {	Line 476 sub showhashsubset {
my ($hash,$keyre) = @_;	my ($hash,$keyre) = @_;
my $resultkey;	my $resultkey;
foreach $resultkey (sort keys %$hash) {	foreach $resultkey (sort keys %$hash) {
if ($resultkey =~ /$keyre/) {	if ($resultkey !~ /$keyre/) { next; }
if (ref($$hash{$resultkey})) {	if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
if ($$hash{$resultkey} =~ /ARRAY/ ) {	&Apache::lonxml::debug("$resultkey ---- ".
&Apache::lonxml::debug("$resultkey ---- ".	&showarray($$hash{$resultkey}));
&showarray($$hash{$resultkey}));	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
} elsif ($$hash{$resultkey} =~ /HASH/ ) {	&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");	&showhashsubset($$hash{$resultkey},'.');
&showhashsubset($$hash{$resultkey},'.');	} else {
} else {	&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
}
} else {
&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
}
}	}
}	}
&Apache::lonxml::debug("\n<br />restored values^</br>\n");	&Apache::lonxml::debug("\n<br />restored values^</br>\n");
Line 292 sub showhashsubset {	Line 492 sub showhashsubset {
}	}

sub setuppermissions {	sub setuppermissions {
$Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});	$Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});	my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
if (! $viewgrades &&	if (! $viewgrades &&
exists($ENV{'request.course.sec'}) &&	exists($env{'request.course.sec'}) &&
$ENV{'request.course.sec'} !~ /^\s*$/) {	$env{'request.course.sec'} !~ /^\s*$/) {
$viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
'/'.$ENV{'request.course.sec'});	'/'.$env{'request.course.sec'});
	}
	$Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
	if ($Apache::lonhomework::browse eq 'F' &&
	$env{'form.devalidatecourseresdata'} eq 'on') {
	my (undef,$courseid) = &Apache::lonxml::whichuser();
	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
	$env{"course.$courseid.domain"});
	}
	my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
	if (! $modifygrades &&
	exists($env{'request.course.sec'}) &&
	$env{'request.course.sec'} !~ /^\s*$/) {
	$modifygrades =
	&Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
	'/'.$env{'request.course.sec'});
}	}
$Apache::lonhomework::viewgrades = $viewgrades;	$Apache::lonhomework::modifygrades = $modifygrades;
return ''	return '';
}	}

sub setupheader {	sub setupheader {
my $request=$_[0];	my $request=$_[0];
if ($ENV{'browser.mathml'}) {	&Apache::loncommon::content_type($request,'text/html');
$request->content_type('text/xml');
} else {
$request->content_type('text/html');
}
$request->content_encoding('UTF-8');
if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {	if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
&Apache::loncommon::no_cache($request);	&Apache::loncommon::no_cache($request);
}	}
	# $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
	# 'lastrevisiondate'));
$request->send_http_header;	$request->send_http_header;
return OK if $request->header_only;	return OK if $request->header_only;
return ''	return ''
Line 327 sub handle_save_or_undo {	Line 539 sub handle_save_or_undo {
my $filetmp =$file.".tmp";	my $filetmp =$file.".tmp";
my $error=0;	my $error=0;

if ($ENV{'form.Undo'} eq 'undo') {	&Apache::lonnet::correct_line_ends($result);

	if ($env{'form.Undo'} eq &mt('undo')) {
my $error=0;	my $error=0;
if (!copy($file,$filetmp)) { $error=1; }	if (!copy($file,$filetmp)) { $error=1; }
if ((!$error) && (!copy($filebak,$file))) { $error=1; }	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
if (!$error) {	if (!$error) {
$request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");	&Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
} else {	} else {
$request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");	&Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
$error=1;	$error=1;
}	}
} else {	} else {
my $fs=Apache::File->new(">$filebak");	my $fs=Apache::File->new(">$filebak");
if (defined($fs)) {	if (defined($fs)) {
print $fs $$problem;	print $fs $$problem;
$request->print("<b>".&mt("Making Backup to").	&Apache::lonxml::info("<b>".&mt("Making Backup to").
" $filebak</b><br />");	" $filebak</b>");
} else {	} else {
$request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");	&Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
$error=2;	$error=2;
}	}
my $fh=Apache::File->new(">$file");	my $fh=Apache::File->new(">$file");
if (defined($fh)) {	if (defined($fh)) {
print $fh $$result;	print $fh $$result;
$request->print("<b>".&mt("Saving Modifications to").	&Apache::lonxml::info("<b>".&mt("Saving Modifications to").
" $file</b><br />");	" $file</b>");
} else {	} else {
$request->print("<font color=\"red\" size=\"+1\"><b>".	&Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
&mt("Unable to write to")." $file</b></font>");	&mt("Unable to write to")." $file</b></font>");
$error\|=4;	$error\|=4;
}	}
}	}
Line 364 sub handle_save_or_undo {	Line 578 sub handle_save_or_undo {

sub analyze_header {	sub analyze_header {
my ($request) = @_;	my ($request) = @_;
my $result.='<html>	my $bodytag='<body bgcolor="#ffffff">';
	if ($env{'environment.remote'} eq 'off') {
	$bodytag=&Apache::loncommon::bodytag();
	}
	my $html=&Apache::lonxml::xmlbegin();
	my $result.=$html.'
<head><title>'.&mt("Analyzing a problem").'</title></head>	<head><title>'.&mt("Analyzing a problem").'</title></head>
<body bgcolor="#FFFFFF">	'.$bodytag.&Apache::lonxml::message_location().'
<form name="lonhomework" method="POST" action="'.	<form name="lonhomework" method="POST" action="'.
$ENV{'request.uri'}.'">	&HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
	&Apache::structuretags::remember_problem_state().'
<input type="submit" name="problemmode" value="'.&mt("EditXML").'" />	<input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
<input type="submit" name="problemmode" value="'.&mt('Edit').'" />	<input type="submit" name="problemmode" value="'.&mt('Edit').'" />
<hr />	<hr />
<input type="submit" name="submit" value="'.&mt("View").'" />	<input type="submit" name="submit" value="'.&mt("View").'" />
<hr />	<hr />
'.&mt('List of possible answers').':
</form>';	</form>';
	&Apache::lonxml::add_messages(\$result);
$request->print($result);	$request->print($result);
$request->rflush();	$request->rflush();
}	}
Line 393 sub analyze {	Line 613 sub analyze {
my $result;	my $result;
my %overall;	my %overall;
my %allparts;	my %allparts;
my $rndseed=$ENV{'form.rndseed'};	my $rndseed=$env{'form.rndseed'};
&analyze_header($request);	&analyze_header($request);
my %prog_state=	my %prog_state=
&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
&mt('Getting Problem Variants'),	&mt('Getting Problem Variants'),
$ENV{'form.numtoanalyze'});	$env{'form.numtoanalyze'},
for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {	'inline',undef);
	for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
&mt('last problem'));	&mt('last problem'));
	if (&Apache::loncommon::connection_aborted($request)) { return; }
my $subresult=&Apache::lonnet::ssi($request->uri,	my $subresult=&Apache::lonnet::ssi($request->uri,
('grade_target' => 'analyze'),	('grade_target' => 'analyze'),
('rndseed' => $i+$rndseed));	('rndseed' => $i+$rndseed));
Line 423 sub analyze {	Line 645 sub analyze {
}	}
&Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,	&Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
&mt('Analyzing Results'));	&mt('Analyzing Results'));
	$request->print('<hr />'.&mt('List of possible answers').': ');
foreach my $part (sort(keys(%allparts))) {	foreach my $part (sort(keys(%allparts))) {
if (defined(@{ $overall{$part.'.answer'} })) {	if (defined(@{ $overall{$part.'.answer'} })) {
my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });	my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
$request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');	$request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
my %frequency;	my %frequency;
foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {	foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
$frequency{join("\0",@{ $answer })}++;	$frequency{join("\0",@{ $answer })}++;
}	}
$request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');	$request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {	foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
$request->print('<tr><td align="right">'.	$request->print('<tr><td align="right">'.
join('</td><td align="right">',split("\0",$answer)).	join('</td><td align="right">',split("\0",$answer)).
Line 440 sub analyze {	Line 663 sub analyze {
}	}
$request->print('</table>');	$request->print('</table>');
} else {	} else {
$request->print('<p>'.&mt('Part').' '.$part.' '.	$request->print('<p>'.&mt('Response').' '.$part.' '.
&mt('is not analyzable at this time').'</p>');	&mt('is not analyzable at this time').'</p>');
}	}
}	}
if (scalar(keys(%allparts)) == 0 ) {	if (scalar(keys(%allparts)) == 0 ) {
$request->print('<p>'.&mt('Found no analyzable parts in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
}	}
&Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);	&Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
&analyze_footer($request);	&analyze_footer($request);
Line 462 sub editxmlmode {	Line 685 sub editxmlmode {
" <i>$file</i></b>");	" <i>$file</i></b>");
$problem='';	$problem='';
}	}
if (defined($ENV{'form.editxmltext'}) \|\| defined($ENV{'form.Undo'})) {	if (defined($env{'form.editxmltext'}) \|\| defined($env{'form.Undo'})) {
my $error=&handle_save_or_undo($request,\$problem,	my $error=&handle_save_or_undo($request,\$problem,
\$ENV{'form.editxmltext'});	\$env{'form.editxmltext'});
if (!$error) { $problem=&Apache::lonnet::getfile($file); }	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
}	}
&Apache::lonhomework::showhashsubset(\%ENV,'^form');	&Apache::lonhomework::showhashsubset(\%env,'^form');
if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {	if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
&Apache::lonhomework::showhashsubset(\%ENV,'^form');	&Apache::lonhomework::showhashsubset(\%env,'^form');
$ENV{'form.problemmode'}='View';	$env{'form.problemmode'}='View';
&renderpage($request,$file);	&renderpage($request,$file);
} else {	} else {
my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
my $xml_help = Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",	my $xml_help = '<table><tr><td>'.
"Problem Editing Help");	&Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
	"Problem Editing Help").
	'</td><td>'.
	&Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
	'</td></tr></table>';
if ($cols > 80) { $cols = 80; }	if ($cols > 80) { $cols = 80; }
if ($cols < 70) { $cols = 70; }	if ($cols < 70) { $cols = 70; }
if ($rows < 20) { $rows = 20; }	if ($rows < 20) { $rows = 20; }
$result.='<html><body bgcolor="#FFFFFF">	my $bodytag='<body bgcolor="#ffffff">';
	if ($env{'environment.remote'} eq 'off') {
	$bodytag=&Apache::loncommon::bodytag();
	}
	my $html=&Apache::lonxml::xmlbegin();
	$result.=$html.$bodytag.
	&renderpage($request,$file,['no_output_web'],1).
	&Apache::lonxml::message_location().'
<form name="lonhomework" method="POST" action="'.	<form name="lonhomework" method="POST" action="'.
$ENV{'request.uri'}.'">	&HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
	&Apache::structuretags::remember_problem_state().'
<input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />	<input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
<input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />	<input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
<input type="submit" name="problemmode" value="'.&mt('Edit').'" />	<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
<hr />	<hr />
<input type="submit" name="submit" value="'.&mt('Submit Changes').'" />	<input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
<input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />	<input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
<input type="submit" name="Undo" value="'.&mt('undo').'" />	<input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
<hr />	<hr />
' . $xml_help . '	' . $xml_help . '
<textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.	<textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
&HTML::Entities::encode($problem).'</textarea>	&HTML::Entities::encode($problem,'<>&"').'</textarea>
</form></body></html>';	</form></body></html>';
	&Apache::lonxml::add_messages(\$result);
$request->print($result);	$request->print($result);
}	}
return '';	return '';
}	}

	#
	# Render the page in whatever target desired.
	#
sub renderpage {	sub renderpage {
my ($request,$file) = @_;	my ($request,$file,$targets,$return_string) = @_;

my (@targets) = &get_target();	my @targets = @{$targets \|\| [&get_target()]};
	&Apache::lonhomework::showhashsubset(\%env,'form.');
&Apache::lonxml::debug("Running targets ".join(':',@targets));	&Apache::lonxml::debug("Running targets ".join(':',@targets));
	my $overall_result;
foreach my $target (@targets) {	foreach my $target (@targets) {
	# FIXME need to do something intelligent when a problem goes
	# from viewable to not viewable due to map conditions
	#&setuppermissions();
	#if ( $Apache::lonhomework::browse ne '2'
	# && $Apache::lonhomework::browse ne 'F' ) {
	# $request->print(" You most likely shouldn't see me.");
	#}
#my $t0 = [&gettimeofday()];	#my $t0 = [&gettimeofday()];
	my $output=1;
	if ($target eq 'no_output_web') {
	$target = 'web'; $output=0;
	}
my $problem=&Apache::lonnet::getfile($file);	my $problem=&Apache::lonnet::getfile($file);
if ($problem eq -1) {	if ($problem eq -1) {
&Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");	&Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
Line 513 sub renderpage {	Line 765 sub renderpage {
}	}

my %mystyle;	my %mystyle;
my $result = '';
if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}

&Apache::lonxml::debug("Should be parsing now");	&Apache::lonxml::debug("Should be parsing now");
$result = &Apache::lonxml::xmlparse($request, $target, $problem,	my $result = &Apache::lonxml::xmlparse($request, $target, $problem,
&setup_vars($target),%mystyle);	&setup_vars($target),%mystyle);
undef($Apache::lonhomework::parsing_a_problem);	undef($Apache::lonhomework::parsing_a_problem);
	if (!$output) { $result = ''; }
#$request->print("Result follows:");	#$request->print("Result follows:");
if ($target eq 'modified') {	if ($target eq 'modified') {
&handle_save_or_undo($request,\$problem,\$result);	&handle_save_or_undo($request,\$problem,\$result);
Line 535 sub renderpage {	Line 787 sub renderpage {
#$result =~ s:</body>::;	#$result =~ s:</body>::;
#$result.="<br />Spent $td seconds processing target $target\n</body>";	#$result.="<br />Spent $td seconds processing target $target\n</body>";
#}	#}
$request->print($result);	# $request->print($result);
$request->rflush();	$overall_result.=$result;
	# $request->rflush();
}	}
#$request->print(":Result ends");	#$request->print(":Result ends");
#my $td=&tv_interval($t0);	#my $td=&tv_interval($t0);
}	}
	if (!$return_string) {
	&Apache::lonxml::add_messages(\$overall_result);
	$request->print($overall_result);
	$request->rflush();
	} else {
	return $overall_result;
	}
}	}

# with no arg it returns a HTML <option> list of the template titles	# with no arg it returns a HTML <option> list of the template titles
Line 572 sub newproblem {	Line 832 sub newproblem {
$extension=~s:^.*\.([\w]+)$:$1:;	$extension=~s:^.*\.([\w]+)$:$1:;
&Apache::lonxml::debug("Looking for :$extension:");	&Apache::lonxml::debug("Looking for :$extension:");
my $templatelist=&get_template_list('',$extension);	my $templatelist=&get_template_list('',$extension);
if ($ENV{'form.template'} &&	if ($env{'form.template'} &&
$ENV{'form.template'} ne "Select a $extension template") {	$env{'form.template'} ne "Select a $extension template") {
use File::Copy;	use File::Copy;
my $file = &get_template_list($ENV{'form.template'},$extension);	my $file = &get_template_list($env{'form.template'},$extension);
my $dest = &Apache::lonnet::filelocation("",$request->uri);	my $dest = &Apache::lonnet::filelocation("",$request->uri);
copy($file,$dest);	copy($file,$dest);
&renderpage($request,$dest);	&renderpage($request,$dest);
} elsif($ENV{'form.newfile'} && !$templatelist) {	} elsif($env{'form.newfile'} && !$templatelist) {
# I don't like hard-coded filenames but for now, this will work.	# I don't like hard-coded filenames but for now, this will work.
use File::Copy;	use File::Copy;
my $templatefilename =	my $templatefilename =
Line 589 sub newproblem {	Line 849 sub newproblem {
copy($templatefilename,$dest);	copy($templatefilename,$dest);
&renderpage($request,$dest);	&renderpage($request,$dest);
} else {	} else {
my $url=$request->uri;	my $url=&HTML::Entities::encode($request->uri,'<>&"');
	my $shownurl=$url;
	$shownurl=~s-^/~-/priv/-;
my $dest = &Apache::lonnet::filelocation("",$request->uri);	my $dest = &Apache::lonnet::filelocation("",$request->uri);
my $errormsg;	my $errormsg;
if ($ENV{'form.newfile'}) {	if ($env{'form.newfile'}) {
$errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";	$errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
}	}
my $instructions;	my $instructions;
	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
	($env{'environment.remote'} ne 'off'));
if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
'resource' => 'resource',	'resource' => 'resource',
Line 606 sub newproblem {	Line 870 sub newproblem {
'Create' => 'Create',	'Create' => 'Create',
'button' => 'button');	'button' => 'button');
$request->print(<<ENDNEWPROBLEM);	$request->print(<<ENDNEWPROBLEM);
<body bgcolor="#FFFFFF">	$bodytag
<h1>$lt{'create'} $extension $lt{'resource'}</h1>	<h1>$lt{'create'} $extension $lt{'resource'}</h1>
$errormsg	$errormsg
$lt{'requested'} <tt>$url</tt> $lt{'not exist'}.	$lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
<p>	<p>
<b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>	<b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
</p>	</p>
Line 626 ENDNEWPROBLEM	Line 890 ENDNEWPROBLEM

sub view_or_edit_menu {	sub view_or_edit_menu {
my ($request) = @_;	my ($request) = @_;
my $url=$request->uri;	my $url=&HTML::Entities::encode($request->uri,'<>&"');
my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',	my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
'view' => 'View',	'view' => 'View',
'Edit' => 'edit',	'Edit' => 'edit',
Line 635 sub view_or_edit_menu {	Line 899 sub view_or_edit_menu {
$request->print(<<EDITMENU);	$request->print(<<EDITMENU);
<body bgcolor="#FFFFFF">	<body bgcolor="#FFFFFF">
<form action="$url" method="POST">	<form action="$url" method="POST">
$lt{'would'} <input type="submit" name="problemmode" value="&lt{'view'}">	$lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
&lt{'or'} <input type="submit" name="problemmode" value="&lt{'Edit'}">	&lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
&lt{'the problem'}.	&lt{'the problem'}.
</form>	</form>
</body>	</body>
Line 647 sub handler {	Line 911 sub handler {
#my $t0 = [&gettimeofday()];	#my $t0 = [&gettimeofday()];
my $request=$_[0];	my $request=$_[0];

$Apache::lonxml::debug=$ENV{'user.debug'};	$Apache::lonxml::debug=$env{'user.debug'};
	$env{'request.uri'}=$request->uri;
if (&setupheader($request)) { return OK; }	&setuppermissions();
$ENV{'request.uri'}=$request->uri;

#setup permissions
$Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
$Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
&Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
# some times multiple problemmodes are submitted, need to select	# some times multiple problemmodes are submitted, need to select
# the last one	# the last one
&Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});	if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
if ( defined($ENV{'form.problemmode'}) &&	my $mode=$env{'form.problemmode'}->[-1];
ref($ENV{'form.problemmode'}) ) {	undef $env{'form.problemmode'};
&Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));	$env{'form.problemmode'}=$mode;
my $mode=$ENV{'form.problemmode'}->[-1];
undef $ENV{'form.problemmode'};
$ENV{'form.problemmode'}=$mode;
}	}
&Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
my $file=&Apache::lonnet::filelocation("",$request->uri);	my $file=&Apache::lonnet::filelocation("",$request->uri);

#check if we know where we are	#check if we know where we are
if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {	if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
# if we are browsing we might not be able to know where we are	# if we are browsing we might not be able to know where we are
if ($Apache::lonhomework::browse ne 'F') {	if ($Apache::lonhomework::browse ne 'F' &&
	$env{'request.state'} ne "construct") {
#should know where we are, so ask	#should know where we are, so ask
if ( &Apache::lonnet::mod_perl_version() == 2 ) {	if ( &Apache::lonnet::mod_perl_version() == 2 ) {
&Apache::lonnet::cleanenv();	&Apache::lonnet::cleanenv();
}	}
$request->internal_redirect('/adm/ambiguous'); return;	&Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
	$request->internal_redirect('/adm/ambiguous'); return OK;
}	}
}	}
	if (&setupheader($request)) { return OK; }
	&Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
	&Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
my ($symb) = &Apache::lonxml::whichuser();	my ($symb) = &Apache::lonxml::whichuser();
&Apache::lonxml::debug('symb is '.$symb);	&Apache::lonxml::debug('symb is '.$symb);
if ($ENV{'request.state'} eq "construct" \|\| $symb eq '') {	if ($env{'request.state'} eq "construct" \|\| $symb eq '') {
if ($ENV{'form.resetdata'} eq 'Reset Submissions' \|\|	if ($env{'form.resetdata'} eq &mt('Reset Submissions') \|\|
$ENV{'form.resetdata'} eq 'New Problem Variation' \|\|	$env{'form.resetdata'} eq &mt('New Problem Variation') \|\|
$ENV{'form.newrandomization'} eq 'New Randomization') {	$env{'form.newrandomization'} eq &mt('New Randomization')) {
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
&Apache::lonnet::tmpreset($symb,'',$domain,$name);	&Apache::lonnet::tmpreset($symb,'',$domain,$name);
&Apache::lonxml::debug("Attempt reset");	&Apache::lonxml::debug("Attempt reset");
}	}
}	}
if ($ENV{'request.state'} eq "construct") {	if ($env{'request.state'} eq "construct") {
if ( -e $file ) {	if ( -e $file ) {
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['problemmode']);	['problemmode']);
if (!(defined $ENV{'form.problemmode'})) {	if (!(defined $env{'form.problemmode'})) {
#first visit to problem in construction space	#first visit to problem in construction space
#&view_or_edit_menu($request);	#&view_or_edit_menu($request);
$ENV{'form.problemmode'}='View';	$env{'form.problemmode'}='View';
&renderpage($request,$file);	&renderpage($request,$file);
} elsif ($ENV{'form.problemmode'} eq 'EditXML') {	} elsif ($env{'form.problemmode'} eq &mt('EditXML') \|\|
	$env{'form.problemmode'} eq 'EditXML') {
&editxmlmode($request,$file);	&editxmlmode($request,$file);
} elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {	} elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
&analyze($request,$file);	&analyze($request,$file);
} else {	} else {
&renderpage($request,$file);	&renderpage($request,$file);

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.149
changed lines
	Added in v.1.214