--- loncom/homework/lonhomework.pm 2000/11/30 16:20:49 1.17 +++ loncom/homework/lonhomework.pm 2002/08/07 18:20:29 1.85 @@ -1,53 +1,107 @@ +# The LearningOnline Network with CAPA # The LON-CAPA Homework handler +# +# $Id: lonhomework.pm,v 1.85 2002/08/07 18:20:29 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 +# 7/18 Jeremy Bowers package Apache::lonhomework; use strict; -use Apache::style; -use Apache::lonxml; -use Apache::lonnet; -use Apache::inputtags; -use Apache::structuretags; -use Apache::response; - - -sub subhandler { - my ($target,$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=(); } +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::caparesponse(); +use Apache::radiobuttonresponse(); +use Apache::optionresponse(); +use Apache::imageresponse(); +use Apache::essayresponse(); +use Apache::externalresponse(); +use Apache::Constants qw(:common); +use HTML::Entities(); +use Apache::loncommon(); +#use Time::HiRes qw( gettimeofday tv_interval ); - 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"); - $default=''; - } - - return Apache::lonxml::xmlparse($target, $problem, - $default.&setup_vars($target),%mystyle); +BEGIN { + &Apache::lonxml::register_insert(); } sub get_target { if ( $ENV{'request.state'} eq "published") { - return 'web'; + if ( defined($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 $ENV{'form.preview'}) { - return 'web'; + if ( defined($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 { - return 'edit'; + 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' ) { + if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) { + return ('modified','web','answer'); + } else { + return ('modified','edit'); + } + } else { + return ('edit'); + } + } else { + return ('web'); + } } } + return (); } sub setup_vars { @@ -59,72 +113,445 @@ sub setup_vars { sub send_header { my ($request)= @_; $request->print(&Apache::lontexconvert::header()); - $ENV{'request.uri'}=$request->uri; # $request->print('
'); } +sub createmenu { + my ($which,$request)=@_; + if ($which eq 'grade') { + $request->print(''); + } +} + sub send_footer { my ($request)= @_; # $request->print('
'); $request->print(&Apache::lontexconvert::footer()); } -sub getfilenothere { - my ($filename) = @_; - my $a=""; - if (! -e $filename ) { - &Apache::lonnet::subscribe($filename); - &Apache::lonnet::repcopy($filename); +$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'); } - { - my $fh=Apache::File->new($filename); - while (<$fh>) { - $a .=$_; + + &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,$datemsg); +} + +sub showhash { + my (%hash) = @_; + &showhashsubset(\%hash,''); + return ''; +} + +sub showhashsubset { + my ($hash,$keyre) = @_; + my $resultkey; + foreach $resultkey (sort keys %$hash) { + if ($resultkey =~ /$keyre/) { + 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}"); + } } } - return $a + &Apache::lonxml::debug("\n
restored values^
\n"); + return ''; } -sub handler { - my $request=shift; +sub setuppermissions { + $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'}); + $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); + return '' +} - $Apache::lonxml::debug=1; +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 OK if $request->header_only; + return '' +} - &Apache::lonhomework::send_header($request); - my $file=&Apache::lonnet::filelocation("",$request->uri); +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); } + } + &Apache::lonhomework::showhashsubset(\%ENV,'^form'); + if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) { + &Apache::lonhomework::showhashsubset(\%ENV,'^form'); + $ENV{'form.problemmode'}='View'; + &renderpage($request,$file); + } else { + my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem); + my $xml_help = Apache::loncommon::help_open_topic("Problem_Editor_XML_Index"); + if ($cols > 80) { $cols = 80; } + $result.=' +
+ + + +
+ + + +
+ ' . $xml_help . ' Problem Help
+ +
'; + $request->print($result); + } + return ''; +} - my $result=&subhandler(&get_target(),$problem); +sub renderpage { + my ($request,$file) = @_; - #$request->print("Result follows:"); - $request->print($result); - #$request->print(":Result ends"); + 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 $temp; - my $resultkey; - foreach $resultkey (sort keys %Apache::lonhomework::results) { - &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}"); + 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 { + my $help = Apache::loncommon::help_open_topic("Ambiguous_Reference"); + $request->print("Browsing or ambiguous reference, submissions ignored $help
"); + } + } + #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); } + } + if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); } + if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');} + + 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"); + $result = &Apache::lonxml::xmlparse($request, $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 \n'; + } + return $result; +} + +sub newproblem { + my ($request) = @_; + my $extension=$request->uri; + $extension=~s:^.*\.([\w]+)$:$1:; + &Apache::lonxml::debug("Looking for :$extension:"); + if ($ENV{'form.template'} && + $ENV{'form.template'} ne "Select a $extension type") { + 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); + my $instructions; + if ($templatelist) { $instructions=", select a template from the pull-down menu below. Then";} + $request->print(< +The requested file $url doesn\'t exist.
+To create a new $extension$instructions click on the Create $extension button. +
+ENDNEWPROBLEM + if (defined($templatelist)) { + $request->print(""); + } + $request->print("
"); + $request->print("
"); + } + return ''; +} + +sub view_or_edit_menu { + my ($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 + &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'}); + if ( defined($ENV{'form.problemmode'}) && + ref($ENV{'form.problemmode'}) ) { + &Apache::lonxml::debug("Problem Mode ".join(",",@$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 + $request->internal_redirect('/adm/ambiguous'); return; + } } - &Apache::lonxml::debug("\n
storing values^
\n"); - &Apache::lonhomework::send_footer($request); - ($temp) = keys %Apache::lonhomework::results; - if ( $temp ne '' ) { - &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results)); + if ($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); } - return 'OK'; + #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; } 500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.