# The LON-CAPA Homework handler # Guy Albertelli # 11/30 Gerd Kortemeyer # 6/1 Gerd Kortemeyer package Apache::lonhomework; use strict; use Apache::style; use Apache::lonxml; use Apache::lonnet; use Apache::inputtags; use Apache::structuretags; use Apache::response; use Apache::hint; use Apache::Constants qw(:common); sub get_target { if ( $ENV{'request.state'} eq "published") { if ( defined $ENV{'form.submit'}) { return ('grade', 'web'); } else { return ('web'); } } elsif ($ENV{'request.state'} eq "construct") { if ( defined $ENV{'form.preview'}) { if ( defined $ENV{'form.submit'}) { return ('grade', 'web'); } else { return ('web'); } } else { return ('edit'); } } return (); } sub setup_vars { my ($target) = @_; return ';' # return ';$external::target='.$target.';'; } sub send_header { my ($request)= @_; $request->print(&Apache::lontexconvert::header()); $ENV{'request.uri'}=$request->uri; # $request->print('
'); } sub send_footer { my ($request)= @_; # $request->print('
'); $request->print(&Apache::lontexconvert::footer()); } #@Apache::lonhomework::date_status=(); #@Apache::lonhomework::date_msg=(); sub check_date { my ($id) = @_; my $date =''; my $status = ''; my $datemsg = ''; my $lastdate = ''; my $temp; my $type; my $passed; &Apache::lonxml::debug("checking for part :$id:"); foreach $temp ("opendate","duedate","answerdate") { $lastdate = $date; $date = &Apache::lonnet::EXT("resource.$id.$temp"); &Apache::lonxml::debug("found :$date: for :$temp:"); if ($date eq '') { $date = "an unknown date"; $passed = 0; } else { if (time < $date) { $passed = 0; } else { $passed = 1; } $date = localtime $date; } if (!$passed) { $type=$temp; last; } } &Apache::lonxml::debug("have :$type:$passed:"); if ($passed) { $status='SHOW_ANSWER'; $datemsg=$date; } elsif ($type eq 'opendate') { $status='CLOSED'; $datemsg = "will open on $date"; } elsif ($type eq 'duedate') { $status='CAN_ANSWER'; $datemsg = "is due at $date"; } elsif ($type eq 'answerdate') { $status='CLOSED'; $datemsg = "was due as $lastdate, and answers will be available at $date"; } if ($status eq 'CAN_ANSWER') { #check #tries my $tries = $Apache::lonhomework::history{"resource.$id.tries"}; my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries"); if ( $tries eq '' ) { $tries = '0'; } if ( $maxtries eq '' ) { $maxtries = '2'; } if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } } &Apache::lonxml::debug("sending back :$status:$datemsg:"); if ($ENV{'request.state'} eq "construct") { &Apache::lonxml::debug("in construction ignoring dates"); $status='CAN_ANSWER'; $datemsg='is in under construction'; } return ($status,$datemsg); } sub handler { my $request=$_[0]; if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; } my (@targets) = &get_target(); if ($ENV{'browser.mathml'}) { $request->content_type('text/xml'); } else { $request->content_type('text/html'); } $request->send_http_header; return OK if $request->header_only; &Apache::lonhomework::send_header($request); #check if allowed to see foreach my $target (@targets) { my $file=&Apache::lonnet::filelocation("",$request->uri); my $problem=&Apache::lonnet::getfile($file); if ($problem == -1) { &Apache::lonxml::error(" Unable to find $file"); $problem=''; } my %mystyle; my $result = ''; &Apache::inputtags::initialize_inputtags; %Apache::lonhomework::results=(); %Apache::lonhomework::history=&Apache::lonnet::restore; #ignore error conditions my ($temp)=keys %Apache::lonhomework::history ; if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } if ($target eq 'web' && &Apache::lonnet::symbread() eq '') { $request->print("Vieiwing this problem as not a student, submissions will be ignored."); } if ($target eq 'grade') { my $resultkey; foreach $resultkey (sort keys %Apache::lonhomework::history) { &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}"); } &Apache::lonxml::debug("\n
restored values^
\n"); } my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm'); if ($default == -1) { &Apache::lonxml::error("Unable to find default_homework.lcpm"); $default=''; } if ( $target eq 'grade') { $Apache::lonxml::textredirection = 0; } else { $Apache::lonxml::textredirection = 1; } $result = &Apache::lonxml::xmlparse($target, $problem, $default.&setup_vars($target),%mystyle); #$request->print("Result follows:"); $request->print($result); #$request->print(":Result ends"); if ($target eq 'grade') { my $resultkey; foreach $resultkey (sort keys %Apache::lonhomework::results) { &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}"); } &Apache::lonxml::debug("\n
storing values^
\n"); } my ($temp) = keys %Apache::lonhomework::results; if ( $temp ne '' ) { &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results)); } } &Apache::lonhomework::send_footer($request); return OK; } 1; __END__