# 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::outputtags; use Apache::Constants qw(:common); #use Time::HiRes qw( gettimeofday tv_interval ); sub BEGIN { &Apache::lonxml::register_insert(); } sub get_target { if ( $ENV{'request.state'} eq "published") { if ( defined $ENV{'form.submitted'}) { return ('grade', 'web'); } else { return ('web'); } } elsif ($ENV{'request.state'} eq "construct") { if ( defined $ENV{'form.preview'}) { if ( defined $ENV{'form.submitted'}) { return ('grade', 'web'); } else { return ('web'); } } else { if ( $ENV{'form.problemmode'} eq 'View' ) { if ( defined $ENV{'form.submitted'}) { return ('grade', 'web'); } else { return ('web'); } } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) { if ( $ENV{'form.submitted'} eq 'edit' ) { return ('modified','edit'); } else { return ('edit'); } } else { return ('web'); } } } return (); } sub setup_vars { my ($target) = @_; return ';' # return ';$external::target='.$target.';'; } sub send_header { my ($request)= @_; $request->print(&Apache::lontexconvert::header()); # $request->print('
'); } sub createmenu { my ($which,$request)=@_; if ($which eq 'grade') { $request->print(''); } } sub send_footer { my ($request)= @_; # $request->print('
'); $request->print(&Apache::lontexconvert::footer()); } $Apache::lonxml::browse=''; sub check_date { my ($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"; $passed = 0; } elsif ($date eq 'con_lost') { $date = "an indeterminate 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 on $lastdate, and answers will be available on $date"; } if ($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:$datemsg:"); if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) { &Apache::lonxml::debug("should be allowed to browse a resource when closed"); $status='CAN_ANSWER'; $datemsg='is closed but you are allowed to view it'; } if ($ENV{'request.state'} eq "construct") { &Apache::lonxml::debug("in construction ignoring dates"); $status='CAN_ANSWER'; $datemsg='is in under construction'; } return ($status,$datemsg); } sub showhash { my (%hash) = @_; my $resultkey; foreach $resultkey (sort keys %hash) { &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}"); } &Apache::lonxml::debug("\n
restored values^
\n"); return ''; } sub setuppermissions { $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'}); $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); return '' } sub setupheader { my $request=$_[0]; if ($ENV{'browser.mathml'}) { $request->content_type('text/xml'); } else { $request->content_type('text/html'); } $request->send_http_header; return OK if $request->header_only; return '' } sub handle_save_or_undo { my ($request,$problem,$result) = @_; my $fileout = &Apache::lonnet::filelocation("",$request->uri); my $filesave=$fileout.".bak"; if ($ENV{'form.Undo'} eq 'undo') { if (copy($filesave,$fileout)) { $request->print("Undid changes, Copied $filesave to $fileout
"); } else { $request->print("Unable to undo, unable to copy $filesave to $fileout
"); } } else { my $fs=Apache::File->new(">$filesave"); if (defined($fs)) { print $fs $$problem; $request->print("Making Backup to $filesave
"); } else { $request->print("Unable to make backup $filesave"); } my $fh=Apache::File->new(">$fileout"); if (defined($fh)) { print $fh $$result; $request->print("Saving Modifications to $fileout
"); } else { $request->print("Unable to write to $fileout"); } } } sub renderpage { my ($request,$file) = @_; my (@targets) = &get_target(); foreach my $target (@targets) { #my $t0 = [&gettimeofday()]; my $problem=&Apache::lonnet::getfile($file); if ($problem == -1) { &Apache::lonxml::error(" Unable to find $file"); $problem=''; } my %mystyle; my $result = ''; &Apache::inputtags::initialize_inputtags; &Apache::edit::initialize_edit; %Apache::lonhomework::results=(); %Apache::lonhomework::history=&Apache::lonnet::restore(); #ignore error conditions my ($temp)=keys %Apache::lonhomework::history ; if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } if ($target eq 'web') { if (&Apache::lonnet::symbread() eq '') { if ($ENV{'request.state'} eq "construct") { $request->print("In construction space, submissions ignored
"); } else { $request->print("Browsing or ambiguous reference, submissions ignored
"); } } #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); } } if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); } 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=''; } $result = &Apache::lonxml::xmlparse($target, $problem, $default.&setup_vars($target),%mystyle); #$request->print("Result follows:"); if ($target eq 'modified') { &handle_save_or_undo($request,\$problem,\$result); } else { #my $td=&tv_interval($t0); #if ( $Apache::lonxml::debug) { #$result =~ s:::; #$result.="
Spent $td seconds processing target $target\n"; #} $request->print($result); } #$request->print(":Result ends"); if ($target eq 'grade') { &showhash(%Apache::lonhomework::results); } #store new values my ($temp) = keys %Apache::lonhomework::results; if ( $temp ne '' ) { &Apache::lonxml::debug("Store return message:". &Apache::lonnet::cstore(\%Apache::lonhomework::results)); } #my $td=&tv_interval($t0); } } # with no arg it returns a HTML "; } } return $result; } sub newproblem { my ($request) = @_; if ($ENV{'form.template'}) { use File::Copy; my $file = &get_template_list($ENV{'form.template'}); my $dest = &Apache::lonnet::filelocation("",$request->uri); copy($file,$dest); &renderpage($request,$file); } else { my $templatelist=&get_template_list(); my $url=$request->uri; my $dest = &Apache::lonnet::filelocation("",$request->uri); unless (-e $dest) { print "fnx=$dest
"; my $fh=Apache::File->new(">".$dest); print $fh "\n"; $fh->close; } $request->print(< The request file $url doesn\'t exist. You can create a new problem

ENDNEWPROBLEM } return ''; } sub view_or_edit_menu { my ($request) = @_; my $url=$request->uri; $request->print(<
Would you like to or the problem.
EDITMENU } sub handler { #my $t0 = [&gettimeofday()]; my $request=$_[0]; #if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;} if (&setupheader($request)) { return OK; } $ENV{'request.uri'}=$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:"); my $file=&Apache::lonnet::filelocation("",$request->uri); #check if we know where we are if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { # if we are browsing we might not be able to know where we are if ($Apache::lonhomework::browse ne 'F') { #should know where we are, so ask $request->internal_redirect('/adm/ambiguous'); return; } } if ($ENV{'request.state'} eq "construct") { if ( -e $file ) { if (!(defined $ENV{'form.problemmode'})) { #first visit to problem in construction space &view_or_edit_menu($request); #&renderpage($request,$file); } else { &renderpage($request,$file); } } else { # requested file doesn't exist in contruction space &newproblem($request); } } else { # just render the page normally outside of construction space &renderpage($request,$file); } #my $td=&tv_interval($t0); #&Apache::lonxml::debug("Spent $td seconds processing"); # &Apache::lonhomework::send_footer($request); # always turn off debug messages $Apache::lonxml::debug=0; return OK; } 1; __END__