# The LearningOnline Network with CAPA # The LON-CAPA Homework handler # # $Id: lonhomework.pm,v 1.76 2002/04/09 04:46:33 albertel 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/ # # Guy Albertelli # 11/30 Gerd Kortemeyer # 6/1,8/17,8/18 Gerd Kortemeyer package Apache::lonhomework; use strict; use Apache::style(); use Apache::lonxml(); use Apache::lonnet(); use Apache::lonplot(); use Apache::inputtags(); use Apache::structuretags(); use Apache::randomlabel(); use Apache::response(); use Apache::hint(); use Apache::outputtags(); use Apache::Constants qw(:common); use HTML::Entities(); #use Time::HiRes qw( gettimeofday tv_interval ); BEGIN { &Apache::lonxml::register_insert(); } sub get_target { if ( $ENV{'request.state'} eq "published") { if ( defined($ENV{'form.grade_target'}) && ($Apache::lonhomework::viewgrades == 'F' )) { return ($ENV{'form.grade_target'}); } if ( defined($ENV{'form.submitted'})) { return ('grade', 'web'); } else { return ('web'); } } elsif ($ENV{'request.state'} eq "construct") { if ( defined($ENV{'form.grade_target'}) ) { return ($ENV{'form.grade_target'}); } 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'}) && (!defined($ENV{'form.resetdata'})) ) { return ('grade', 'web','answer'); } else { return ('web','answer'); } } 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()); } $Apache::lonxml::browse=''; sub check_access { my ($id) = @_; my $date =''; my $status = ''; my $datemsg = ''; my $lastdate = ''; my $temp; my $type; my $passed; &Apache::lonxml::debug("checking for part :$id:"); &Apache::lonxml::debug("time:".time); 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) { $status = 'CANNOT_ANSWER'; } } if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') && (!$Apache::lonhomework::history{"resource.0.outtoken"})) { return ('UNCHECKEDOUT','needs to be checked out'); } &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 $resultkey (sort keys %hash) { if (ref($hash{$resultkey})) { if ($hash{$resultkey} =~ /ARRAY/ ) { my $string="$resultkey ---- ("; foreach my $elm (@{ $hash{$resultkey} }) { $string.="$elm,"; } chop($string); &Apache::lonxml::debug("$string)"); } else { &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}"); } } else { &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 { $request->content_type('text/html'); } if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) { &Apache::loncommon::no_cache($request); } $request->send_http_header; return OK if $request->header_only; return '' } sub handle_save_or_undo { my ($request,$problem,$result) = @_; my $file = &Apache::lonnet::filelocation("",$request->uri); my $filebak =$file.".bak"; my $filetmp =$file.".tmp"; my $error=0; if ($ENV{'form.Undo'} eq 'undo') { my $error=0; if (!copy($file,$filetmp)) { $error=1; } if ((!$error) && (!copy($filebak,$file))) { $error=1; } if ((!$error) && (!move($filetmp,$filebak))) { $error=1; } if (!$error) { $request->print("

Undid changes, Switched $filebak and $file

"); } else { $request->print("

Unable to undo, unable to switch $filebak and $file

"); $error=1; } } else { my $fs=Apache::File->new(">$filebak"); if (defined($fs)) { print $fs $$problem; $request->print("Making Backup to $filebak
"); } else { $request->print("Unable to make backup $filebak"); $error=2; } my $fh=Apache::File->new(">$file"); if (defined($fh)) { print $fh $$result; $request->print("Saving Modifications to $file
"); } else { $request->print("Unable to write to $file"); $error|=4; } } return $error; } sub analyze { my ($request,$file) = @_; &Apache::lonxml::debug("Analyze"); my $result=&Apache::lonnet::ssi($request->uri,('grade_target' => 'analyze')); &Apache::lonxml::debug(":$result:"); (my $garbage,$result)=split(/_HASH_REF__/,$result,2); &showhash(&Apache::lonnet::str2hash($result)); return $result; } sub editxmlmode { my ($request,$file) = @_; my $result; my $problem=&Apache::lonnet::getfile($file); if ($problem == -1) { &Apache::lonxml::error(" Unable to find $file"); $problem=''; } if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) { my $error=&handle_save_or_undo($request,\$problem, \$ENV{'form.editxmltext'}); if (!$error) { $problem=&Apache::lonnet::getfile($file); } } my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem); if ($cols > 80) { $cols = 80; } $result.='


'; $request->print($result); return ''; } sub renderpage { my ($request,$file) = @_; my (@targets) = &get_target(); &Apache::lonxml::debug("Running targets ".join(':',@targets)); 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 $result = ''; &Apache::inputtags::initialize_inputtags; &Apache::edit::initialize_edit; if ($target eq 'analyze') { %Apache::lonhomework::anaylze=(); } if ($target eq 'web') { my ($symb)=&Apache::lonxml::whichuser(); if ($symb eq '') { if ($ENV{'request.state'} eq "construct") { } 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=''; } &Apache::lonxml::debug("Should be parsing now"); $result = &Apache::lonxml::xmlparse($target, $problem, $default.&setup_vars($target),%mystyle); #$request->print("Result follows:"); if ($target eq 'modified') { &handle_save_or_undo($request,\$problem,\$result); } else { if ($target eq 'analyze') { $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze); undef(%Apache::lonhomework::analyze); } #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"); #my $td=&tv_interval($t0); } } # with no arg it returns a HTML "; } } return $result; } sub newproblem { my ($request) = @_; my $extension=$request->uri; $extension=~s:^.*\.([\w]+)$:$1:; &Apache::lonxml::debug("Looking for :$extension:"); if ($ENV{'form.template'}) { use File::Copy; my $file = &get_template_list($ENV{'form.template'},$extension); my $dest = &Apache::lonnet::filelocation("",$request->uri); copy($file,$dest); &renderpage($request,$dest); } elsif($ENV{'form.newfile'}) { # I don't like hard-coded filenames but for now, this will work. use File::Copy; my $templatefilename = $request->dir_config('lonIncludes').'/templates/blank.problem'; &Apache::lonxml::debug("$templatefilename"); my $dest = &Apache::lonnet::filelocation("",$request->uri); copy($templatefilename,$dest); &renderpage($request,$dest); }else { my $templatelist=&get_template_list('',$extension); my $url=$request->uri; my $dest = &Apache::lonnet::filelocation("",$request->uri); if (!defined($templatelist)) { # We didn't find a template, so just create a blank problem. $request->print(< The requested file $url doesn\'t exist. You can create a new $extension

ENDNEWPROBLEM return ''; } $request->print(< The requested file $url doesn\'t exist. You can create a new $extension

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:"); # some times multiple problemmodes are submitted, need to select # the last one if ( defined($ENV{'form.problemmode'}) && defined(@{ $ENV{'form.problemmode'} })) { 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); #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 ($ENV{'form.resetdata'} eq 'Reset Submissions') { my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); &Apache::lonnet::tmpreset($symb,'',$domain,$name); } if ( -e $file ) { if (!(defined $ENV{'form.problemmode'})) { #first visit to problem in construction space #&view_or_edit_menu($request); $ENV{'form.problemmode'}='View'; &renderpage($request,$file); } elsif ($ENV{'form.problemmode'} eq 'EditXML') { &editxmlmode($request,$file); } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') { &analyze($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 &Apache::lonxml::debug("not construct"); &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__