--- loncom/homework/lonhomework.pm 2001/02/13 18:42:06 1.37 +++ loncom/homework/lonhomework.pm 2013/08/20 14:37:33 1.339 @@ -1,225 +1,1328 @@ +# The LearningOnline Network with CAPA # The LON-CAPA Homework handler -# Guy Albertelli -# 11/30 Gerd Kortemeyer -# 6/1 Gerd Kortemeyer +# +# $Id: lonhomework.pm,v 1.339 2013/08/20 14:37:33 bisitz 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/ + package Apache::lonhomework; use strict; -use Apache::style; -use Apache::lonxml; +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::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::rankresponse(); +use Apache::matchresponse(); +use Apache::chemresponse(); +use Apache::functionplotresponse(); +use Apache::drawimage(); use Apache::Constants qw(:common); +use Apache::loncommon(); +use Apache::lonlocal; +use Time::HiRes qw( gettimeofday tv_interval ); +use HTML::Entities(); +use File::Copy(); + +# FIXME - improve commenting + + +BEGIN { + &Apache::lonxml::register_insert(); +} + + +=pod + +=item set_bubble_lines() + +Called at analysis time to set the bubble lines +hash for the problem.. This should be called in the +end_problemtype tag in analysis mode. + +We fetch the hash of part id counters from lonxml + and push them into analyze:{part_id.bubble_lines}. + +=cut + +sub set_bubble_lines { + my %bubble_counters = &Apache::lonxml::get_bubble_line_hash(); + + foreach my $key (keys(%bubble_counters)) { + $Apache::lonhomework::analyze{"$key.bubble_lines"} = + $bubble_counters{"$key"}; + } +} +# +# 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 { - 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 { - #return ('edit'); - #edit is currently broken - return ('web'); + &Apache::lonxml::debug("request.state = $env{'request.state'}"); + if( defined($env{'form.grade_target'})) { + &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}"); + } else { + &Apache::lonxml::debug("form.grade_target "); + } + if (($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' )) { + return ($env{'form.grade_target'}); + } elsif ( $env{'form.grade_target'} eq 'webgrade' + && ($Apache::lonhomework::queuegrade eq 'F' )) { + return ($env{'form.grade_target'}); + } elsif ($env{'form.grade_target'} eq 'answer') { + if ($env{'form.answer_output_mode'} eq 'tex') { + return ($env{'form.grade_target'}); + } + } + if ($env{'form.webgrade'} && + ($Apache::lonhomework::modifygrades eq 'F' + || $Apache::lonhomework::queuegrade eq 'F' )) { + return ('grade','webgrade'); + } + if ( defined($env{'form.submitted'}) && + ( !defined($env{'form.newrandomization'}))) { + return ('grade', 'web'); + } else { + return ('web'); + } + } elsif ($env{'request.state'} eq "construct") { +# +# We are in construction space, editing and testing problems +# + if ( defined($env{'form.grade_target'}) ) { + return ($env{'form.grade_target'}); + } + if ( defined($env{'form.preview'})) { + if ( defined($env{'form.submitted'})) { +# +# We are doing a problem preview +# + return ('grade', 'web'); + } else { + return ('web'); + } + } else { + if ($env{'form.problemstate'} eq 'WEB_GRADE') { + return ('grade','webgrade','answer'); + } elsif ($env{'form.problemmode'} eq 'view') { + return ('grade','web','answer'); + } elsif ($env{'form.problemmode'} eq 'saveview') { + return ('modified','web','answer'); + } elsif ($env{'form.problemmode'} eq 'discard') { + return ('web','answer'); + } elsif (($env{'form.problemmode'} eq 'saveedit') || + ($env{'form.problemmode'} eq 'undo')) { + return ('modified','no_output_web','edit'); + } elsif ($env{'form.problemmode'} eq 'edit') { + return ('no_output_web','edit'); + } else { + return ('web'); + } + } +# +# End of Authoring Space +# } - } - return (); +# +# Huh? We are nowhere, so do nothing. +# + return (); } sub setup_vars { - my ($target) = @_; - return ';' + my ($target) = @_; + return ';' # return ';$external::target='.$target.';'; } -sub send_header { - my ($request)= @_; - $request->print(&Apache::lontexconvert::header()); - $ENV{'request.uri'}=$request->uri; -# $request->print('
'); -} - -sub createmenu { - my ($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,$datemsg); +sub proctor_checked_in { + my ($slot_name,$slot,$type)=@_; + my @possible_proctors=split(",",$slot->{'proctor'}); + + return 1 if (!@possible_proctors); + + my $key; + if ($type eq 'Task') { + my $version=$Apache::lonhomework::history{'resource.0.version'}; + $key ="resource.$version.0.checkedin"; + } elsif ($type eq 'problem') { + $key ='resource.0.checkedin'; + } + # backward compatability, used to be username@domain, + # now is username:domain + my $who = $Apache::lonhomework::history{$key}; + if ($who !~ /:/) { + $who =~ tr/@/:/; + } + foreach my $possible (@possible_proctors) { + if ($who eq $possible + && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) { + return 1; + } + } + + return 0; } -sub handler { - my $request=$_[0]; - - if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;} else {$Apache::lonxml::debug=0;} - - my (@targets) = &get_target(); +sub check_slot_access { + my ($id,$type)=@_; - if ($ENV{'browser.mathml'}) { - $request->content_type('text/xml'); - } else { - $request->content_type('text/html'); - } - $request->send_http_header; - return OK if $request->header_only; - - #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:"); - - #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 - $request->internal_redirect('/adm/ambiguous'); return; + # does it pass normal muster + my ($status,$datemsg)=&check_access($id); + + my $useslots = &Apache::lonnet::EXT("resource.0.useslots"); + if ($useslots ne 'resource' && $useslots ne 'map' + && $useslots ne 'map_map') { + return ($status,$datemsg); } - } - &Apache::lonhomework::send_header($request); - - 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') { - 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') { - 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"); - $default=''; + if ($status eq 'SHOW_ANSWER' || + $status eq 'CLOSED' || + $status eq 'INVALID_ACCESS' || + $status eq 'UNAVAILABLE') { + return ($status,$datemsg); + } + if ($env{'request.state'} eq "construct") { + return ($status,$datemsg); + } + + if ($type eq 'Task') { + my $version=$Apache::lonhomework::history{'resource.version'}; + if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} && + $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') { + return ('SHOW_ANSWER'); + } + } + + my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent"); + my $available = &Apache::lonnet::EXT("resource.0.available"); + my @slots= (split(':',$availablestudent),split(':',$available)); + +# if (!@slots) { +# return ($status,$datemsg); +# } + my $slotstatus='NOT_IN_A_SLOT'; + my ($returned_slot,$slot_name); + my $now = time; + my $num_usable_slots = 0; + foreach my $slot (@slots) { + $slot =~ s/(^\s*|\s*$)//g; + &Apache::lonxml::debug("getting $slot"); + my %slot=&Apache::lonnet::get_slot($slot); + &Apache::lonhomework::showhash(%slot); + next if ($slot{'endtime'} < $now); + $num_usable_slots ++; + if ($slot{'starttime'} < $now && + $slot{'endtime'} > $now && + &Apache::loncommon::check_ip_acc($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,$returned_slot,$type)) { + &Apache::lonxml::debug("proctor checked in"); + $slotstatus=$status; + } + + my ($is_correct,$got_grade,$checkedin); + if ($type eq 'Task') { + my $version=$Apache::lonhomework::history{'resource.0.version'}; + $got_grade = + ($Apache::lonhomework::history{"resource.$version.0.status"} + =~ /^(?:pass|fail)$/); + $is_correct = + ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass' + || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ ); + $checkedin = + $Apache::lonhomework::history{"resource.$version.0.checkedin"}; + } elsif ($type eq 'problem') { + $got_grade = 1; + $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"}; + $is_correct = + ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/); + } + + &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)"); + + # no slot is currently open, and has been checked in for this version + # but hasn't got a grade, therefore must be awaiting a grade + if (!defined($slot_name) + && $checkedin + && !$got_grade) { + return ('WAITING_FOR_GRADE'); + } + + # Previously used slot is no longer open, and has been checked in for this version. + # However, the problem is not closed, and potentially, another slot might be + # used to gain access to it to work on it, until the due date is reached, and the + # problem then becomes CLOSED. Therefore return the slotstatus - + # (which will be one of: NOT_IN_A_SLOT, RESERVABLE, RESERVABLE_LATER, or NOTRESERVABLE. + if (!defined($slot_name) && $type eq 'problem') { + if ($slotstatus eq 'NOT_IN_A_SLOT') { + if (!$num_usable_slots) { + if ($env{'request.course.id'}) { + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my ($symb)=&Apache::lonnet::whichuser(); + $slotstatus = 'NOTRESERVABLE'; + my ($reservable_now_order,$reservable_now,$reservable_future_order, + $reservable_future) = + &Apache::loncommon::get_future_slots($cnum,$cdom,$now,$symb); + if ((ref($reservable_now_order) eq 'ARRAY') && (ref($reservable_now) eq 'HASH')) { + if (@{$reservable_now_order} > 0) { + $slotstatus = 'RESERVABLE'; + $datemsg = $reservable_now->{$reservable_now_order->[-1]}{'endreserve'}; + } + } + unless ($slotstatus eq 'RESERVABLE') { + if ((ref($reservable_future_order) eq 'ARRAY') && (ref($reservable_future) eq 'HASH')) { + if (@{$reservable_future_order} > 0) { + $slotstatus = 'RESERVABLE_LATER'; + $datemsg = $reservable_future->{$reservable_future_order->[0]}{'startreserve'}; + } + } + } + } + } + } + return ($slotstatus,$datemsg); + } + + if ($slotstatus eq 'NOT_IN_A_SLOT' + && $checkedin ) { + + if ($got_grade) { + return ('SHOW_ANSWER'); + } else { + return ('WAITING_FOR_GRADE'); + } + + } + + if ( $is_correct) { + if ($type eq 'problem') { + return ($status); + } + return ('SHOW_ANSWER'); + } + + if ( $status eq 'CANNOT_ANSWER' && + ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) { + return ($status,$datemsg); + } + + return ($slotstatus,$datemsg,$slot_name,$returned_slot); +} + +# JB, 9/24/2002: Any changes in this function may require a change +# in lonnavmaps::resource::getDateStatus. +sub check_access { + my ($id) = @_; + my $date =''; + my $status; + my $datemsg = ''; + my $lastdate = ''; + my $type; + my $passed; + + if ($env{'request.state'} eq "construct") { + if ($env{'form.problemstate'}) { + if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) { + if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' + && &hide_problem_status())) { + return ('CANNOT_ANSWER', + &mt('is in this state due to author settings.')); + } + } else { + return ($env{'form.problemstate'}, + &mt('is in this state due to author settings.')); + } + } + &Apache::lonxml::debug("in construction ignoring dates"); + $status='CAN_ANSWER'; + $datemsg=&mt('is in under construction'); +# return ($status,$datemsg); + } + + &Apache::lonxml::debug("checking for part :$id:"); + &Apache::lonxml::debug("time:".time); + + my ($symb)=&Apache::lonnet::whichuser(); + &Apache::lonxml::debug("symb:".$symb); + #if ($env{'request.state'} ne "construct" && $symb ne '') { + if ($env{'request.state'} ne "construct") { + my $idacc = &Apache::lonnet::EXT("resource.$id.acc"); + my $allowed=&Apache::loncommon::check_ip_acc($idacc); + if (!$allowed && ($Apache::lonhomework::browse ne 'F')) { + $status='INVALID_ACCESS'; + $date=&mt("can not be accessed from your location."); + return($status,$date); + } + if ($env{'form.grade_imsexport'}) { + if (($env{'request.course.id'}) && + (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) { + return ('SHOW_ANSWER'); + } + } + foreach my $temp ("opendate","duedate","answerdate") { + $lastdate = $date; + if ($temp eq 'duedate') { + $date = &due_date($id); + } else { + $date = &Apache::lonnet::EXT("resource.$id.$temp"); + } + + my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type"); + if ($thistype =~ /^(con_lost|no_such_host)/ || + $date =~ /^(con_lost|no_such_host)/) { + $status='UNAVAILABLE'; + $date=&mt("may open later."); + return($status,$date); + } + if ($thistype eq 'date_interval') { + if ($temp eq 'opendate') { + $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date; + } + if ($temp eq 'answerdate') { + $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date; + } + } + &Apache::lonxml::debug("found :$date: for :$temp:"); + if ($date eq '') { + $date = &mt("an unknown date"); $passed = 0; + } elsif ($date eq 'con_lost') { + $date = &mt("an indeterminate date"); $passed = 0; + } else { + if (time < $date) { $passed = 0; } else { $passed = 1; } + $date = &Apache::lonlocal::locallocaltime($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 = &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' || + (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) { + #check #tries, and if correct. + my $tries = $Apache::lonhomework::history{"resource.$id.tries"}; + my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries"); + if ( $tries eq '' ) { $tries = '0'; } + if ( $maxtries eq '' && + $env{'request.state'} ne 'construct') { $maxtries = '2'; } + $Apache::lonhomework::results{'resource.'.$id.'.maxtries'}=$maxtries; + if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } + # if (correct and show prob status) or excused then CANNOT_ANSWER + if ( ($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/) + && (&show_problem_status()) ) { + if (($Apache::lonhomework::history{"resource.$id.awarded"} >= 1) || + (&Apache::lonnet::EXT("resource.$id.retrypartial") !~/^1|on|yes$/i)) { + $status = 'CANNOT_ANSWER'; + } + } elsif ($Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) { + $status = 'CANNOT_ANSWER'; + } + if ($status eq 'CANNOT_ANSWER' + && &show_answer_problem_status()) { + $status = 'SHOW_ANSWER'; + } + } + if ($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[0]) { + my $first_access=&Apache::lonnet::get_first_access($interval[1]); + &Apache::lonxml::debug("looking for accesstime $first_access"); + if (!$first_access) { + $status='NOT_YET_VIEWED'; + my $due_date = &due_date($id); + my $seconds_left = $due_date - time; + if ($seconds_left > $interval[0] || $due_date eq '') { + $seconds_left = $interval[0]; + } + $datemsg=&seconds_to_human_length($seconds_left); + } + } + } + + #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'; + $datemsg=&mt('is closed but you are allowed to view it'); + } + + return ($status,$datemsg); +} +# this should work exactly like the copy in lonnavmaps.pm +sub due_date { + my ($part_id,$symb,$udom,$uname)=@_; + my $date; + my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb, + $udom,$uname); + &Apache::lonxml::debug("looking for interval $part_id $symb @interval"); + my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb, + $udom,$uname); + &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date"); + if ($interval[0] =~ /\d+/) { + my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb); + &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])"); + if (defined($first_access)) { + my $interval = $first_access+$interval[0]; + $date = (!$due_date || $interval < $due_date) ? $interval + : $due_date; + } else { + $date = $due_date; + } + } else { + $date = $due_date; + } + return $date +} + +sub seconds_to_human_length { + my ($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 $timestr; +} + +sub showhash { + my (%hash) = @_; + &showhashsubset(\%hash,'.'); + return ''; +} + +sub showarray { + my ($array)=@_; + my $string="("; + foreach my $elm (@{ $array }) { + if (ref($elm) eq 'ARRAY') { + $string.=&showarray($elm); + } elsif (ref($elm) eq 'HASH') { + $string.= "HASH --- \n
"; + $string.= &showhashsubset($elm,'.'); + } else { + $string.="$elm," + } + } + chop($string); + $string.=")"; + return $string; +} + +sub showhashsubset { + my ($hash,$keyre) = @_; + my $resultkey; + foreach $resultkey (sort keys %$hash) { + if ($resultkey !~ /$keyre/) { next; } + if (ref($$hash{$resultkey}) eq 'ARRAY' ) { + &Apache::lonxml::debug("$resultkey ---- ". + &showarray($$hash{$resultkey})); + } elsif (ref($$hash{$resultkey}) eq 'HASH' ) { + &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}"); + &showhashsubset($$hash{$resultkey},'.'); + } else { + &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}"); + } + } + &Apache::lonxml::debug("\n
restored values^
\n"); + return ''; +} + +sub setuppermissions { + $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'}); + unless ($Apache::lonhomework::browse eq 'F') { + $Apache::lonhomework::browse=&Apache::lonnet::allowed('bro',$env{'request.filename'}); + } + my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}); + if (! $viewgrades && + exists($env{'request.course.sec'}) && + $env{'request.course.sec'} !~ /^\s*$/) { + $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}. + '/'.$env{'request.course.sec'}); + } + $Apache::lonhomework::viewgrades = $viewgrades; + + if ($Apache::lonhomework::browse eq 'F' && + $env{'form.devalidatecourseresdata'} eq 'on') { + my (undef,$courseid) = &Apache::lonnet::whichuser(); + &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"}, + $env{"course.$courseid.domain"}); } - $result = &Apache::lonxml::xmlparse($target, $problem, - $default.&setup_vars($target),%mystyle); - #$request->print("Result follows:"); + 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::modifygrades = $modifygrades; + + my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'}); + if (! $queuegrade && + exists($env{'request.course.sec'}) && + $env{'request.course.sec'} !~ /^\s*$/) { + $queuegrade = + &Apache::lonnet::allowed('qgr',$env{'request.course.id'}. + '/'.$env{'request.course.sec'}); + } + $Apache::lonhomework::queuegrade = $queuegrade; + return ''; +} + +sub unset_permissions { + undef($Apache::lonhomework::queuegrade); + undef($Apache::lonhomework::modifygrades); + undef($Apache::lonhomework::viewgrades); + undef($Apache::lonhomework::browse); +} + +sub setupheader { + my $request=$_[0]; + &Apache::loncommon::content_type($request,'text/html'); + if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) { + &Apache::loncommon::no_cache($request); + } +# $request->set_last_modified(&Apache::lonnet::metadata($request->uri, +# 'lastrevisiondate')); + $request->send_http_header; + return OK if $request->header_only; + return '' +} + +sub handle_save_or_undo { + my ($request,$problem,$result,$getobjref) = @_; + + my $file = &Apache::lonnet::filelocation("",$request->uri); + my $filebak =$file.".bak"; + my $filetmp =$file.".tmp"; + my $error=0; + if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) { + my $error=0; + if (!&File::Copy::copy($file,$filetmp)) { $error=1; } + if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; } + if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; } + if (!$error) { + &Apache::lonxml::info("

". + &mt("Undid changes, Switched [_1] and [_2]", + ''.$filebak. + '', + ''.$file. + '')."

"); + } else { + &Apache::lonxml::info("

". + &mt("Unable to undo, unable to switch [_1] and [_2]", + ''. + $filebak.'', + ''. + $file.'')."

"); + $error=1; + } + } else { + &Apache::lonnet::correct_line_ends($result); + + my $fs=Apache::File->new(">$filebak"); + if (defined($fs)) { + print $fs $$problem; + } else { + &Apache::lonxml::info("". + &mt("Unable to make backup [_1]", + ''. + $filebak.'').""); + $error=2; + } + my $fh=Apache::File->new(">$file"); + if (defined($fh)) { + print $fh $$result; + if (ref($getobjref) eq 'SCALAR') { + if ($file =~ m{([^/]+)\.(html?)$}) { + my $fname = $1; + my $ext = $2; + my $path = $file; + $path =~ s/\Q$fname\E\.\Q$ext\E$//; + my (%allfiles,%codebase); + &Apache::lonnet::extract_embedded_items($file,\%allfiles, + \%codebase,$result); + if (keys(%allfiles) > 0) { + my $url = $request->uri; + my $state = < + +STATE + $$getobjref = "

".&mt("Reference Warning")."

". + "

".&mt("Completed upload of the file. This file contained references to other files.")."

". + "

".&mt("Please select the locations from which the referenced files are to be uploaded.")."

". + &Apache::loncommon::ask_for_embedded_content($url,$state,\%allfiles,\%codebase, + {'error_on_invalid_names' => 1, + 'ignore_remote_references' => 1,}); + } + } + } + } else { + &Apache::lonxml::info(''. + &mt("Unable to write to [_1]", + ''. + $file.''). + ''); + $error|=4; + } + } + return $error; +} + +sub analyze_header { + my ($request) = @_; + my $js = &Apache::structuretags::setmode_javascript(); + + # Breadcrumbs + my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri), + 'text' => 'Authoring Space'}, + {'href' => '', + 'text' => 'Problem Testing'}, + {'href' => '', + 'text' => 'Analyzing a problem'}]; + + my $result = + &Apache::loncommon::start_page('Analyzing a problem', + $js, + {'bread_crumbs' => $brcrum,}) + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader()); + $result .= + &Apache::lonxml::message_location().' +
'. + ''. + &Apache::structuretags::remember_problem_state().' +
+ + +
+ +
+
+
'; + &Apache::lonxml::add_messages(\$result); $request->print($result); - #$request->print(":Result ends"); - if ($target eq 'grade') { + $request->rflush(); +} - 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 ( $temp ne '' ) { - &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results)); +sub analyze_footer { + my ($request) = @_; + $request->print(&Apache::loncommon::end_page()); + $request->rflush(); +} + +sub analyze { + my ($request,$file) = @_; + &Apache::lonxml::debug("Analyze"); + my $result; + my %overall; + my %seedexample; + my %allparts; + my $rndseed=$env{'form.rndseed'}; + &analyze_header($request); + my %prog_state= + &Apache::lonhtmlcommon::Create_PrgWin($request,$env{'form.numtoanalyze'}); + for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) { + &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,'last problem'); + if (&Apache::loncommon::connection_aborted($request)) { return; } + my $thisseed=$i+$rndseed; + my $subresult=&Apache::lonnet::ssi($request->uri, + ('grade_target' => 'analyze'), + ('rndseed' => $thisseed)); + (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2); + my %analyze=&Apache::lonnet::str2hash($subresult); + my @parts; + if (ref($analyze{'parts'}) eq 'ARRAY') { + @parts=@{ $analyze{'parts'} }; + } + foreach my $part (@parts) { + if (!exists($allparts{$part})) {$allparts{$part}=1;}; + if ($analyze{$part.'.type'} eq 'numericalresponse' || + $analyze{$part.'.type'} eq 'stringresponse' || + $analyze{$part.'.type'} eq 'formularesponse' ) { + foreach my $name (keys(%{ $analyze{$part.'.answer'} })) { + my $i=0; + foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) { + push( @{ $overall{$part.'.answer'}[$i] }, + $answer_part); + my $concatanswer= join("\0",@{ $answer_part }); + if (($concatanswer eq '') || ($concatanswer=~/^\@/)) { + $answer_part = [''.&mt('Error').'']; + } + $seedexample{join("\0",$part,$i,@{$answer_part})}= + $thisseed; + $i++; + } + } + if (!keys(%{ $analyze{$part.'.answer'} })) { + my $answer_part = + [''.&mt('Error').'']; + $seedexample{join("\0",$part,0,@{$answer_part})}= + $thisseed; + push( @{ $overall{$part.'.answer'}[0] }, + $answer_part); + } + } + } + } + &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,&mt('Analyzing Results')); + $request->print('
' + .'

' + .&mt('List of possible answers') + .'

' + ); + foreach my $part (sort(keys(%allparts))) { + if ((ref($overall{$part.'.answer'}) eq 'ARRAY') && + (@{$overall{$part.'.answer'}} > 0)) { + for (my $i=0;$iprint(&Apache::loncommon::start_data_table() + .&Apache::loncommon::start_data_table_header_row() + .'' + .&mt('Part').' '.$part + ); + if (scalar(@{ $overall{$part.'.answer'} }) > 1) { + $request->print(' '.&mt('Answer [_1]',$i+1)); + } + $request->print('' + .&Apache::loncommon::end_data_table_header_row() + ); + my %frequency; + foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) { + $frequency{join("\0",@{ $answer })}++; + } + $request->print(&Apache::loncommon::start_data_table_header_row() + .''.&mt('Answer').'' + .''.&mt('Frequency').'
' + .'('.&mt('click for example').')' + .&Apache::loncommon::end_data_table_header_row() + ); + foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) { + $request->print(&Apache::loncommon::start_data_table_row() + .'' + .join('',split("\0",$answer)) + .'' + .'' + .''.$frequency{$answer}.'' + .'' + .&Apache::loncommon::end_data_table_row() + ); + } + $request->print(&Apache::loncommon::end_data_table()); + } + } else { + $request->print('

' + .&mt('Response [_1] is not analyzable at this time.',$part) + .'

' + ); + } + } + if (scalar(keys(%allparts)) == 0 ) { + $request->print('

' + .&mt('Found no analyzable responses in this problem.' + .' Currently only Numerical, Formula and String response styles are supported.') + .'

' + ); + } + &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state); + &analyze_footer($request); + &Apache::lonhomework::showhash(%overall); + return $result; +} + +{ + my $show_problem_status; + sub reset_show_problem_status { + undef($show_problem_status); + } + + sub set_show_problem_status { + my ($new_status) = @_; + $show_problem_status = lc($new_status); + } + + sub hide_problem_status { + return ($show_problem_status eq 'no' + || $show_problem_status eq 'no_feedback_ever'); + } + + sub show_problem_status { + return ($show_problem_status eq 'yes' + || $show_problem_status eq 'answer' + || $show_problem_status eq ''); + } + + sub show_some_problem_status { + return ($show_problem_status eq 'no'); + } + + sub show_no_problem_status { + return ($show_problem_status eq 'no_feedback_ever'); } - } - &Apache::lonhomework::send_footer($request); - return OK; + sub show_answer_problem_status { + return ($show_problem_status eq 'answer'); + } +} + +sub editxmlmode { + my ($request,$file) = @_; + my $result; + my $problem=&Apache::lonnet::getfile($file); + if ($problem eq -1) { + &Apache::lonxml::error( + '

' + .&mt('Unable to find [_1]', + ''.$file.'') + .'

'); + + $problem=''; + } + + if (($env{'form.problemmode'} eq 'saveeditxml') || + ($env{'form.problemmode'} eq 'saveviewxml') || + ($env{'form.problemmode'} eq 'undoxml')) { + 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.problemmode'} eq 'saveviewxml') { + &Apache::lonhomework::showhashsubset(\%env,'^form'); + $env{'form.problemmode'}='view'; + &renderpage($request,$file); + } else { + my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem); + if ($cols > 80) { $cols = 80; } + if ($cols < 70) { $cols = 70; } + if ($rows < 20) { $rows = 20; } + my $js = + &Apache::edit::js_change_detection(). + &Apache::loncommon::resize_textarea_js(). + &Apache::structuretags::setmode_javascript(). + &Apache::lonhtmlcommon::dragmath_js("EditMathPopup"); + + # Breadcrumbs + my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri), + 'text' => 'Authoring Space'}, + {'href' => '', + 'text' => 'Problem Editing'}]; + + my $start_page = + &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js, + {'no_auto_mt_title' => 1, + 'only_body' => 0, + 'add_entries' => { + 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')], + 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')], + }, + 'bread_crumbs' => $brcrum, + }); + + $result=$start_page + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader()); + $result.=&renderpage($request,$file,['no_output_web'],1). + '
'. + &Apache::structuretags::remember_problem_state().' +
+ +
+

'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'

+ 		+ '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').' +
'; + + $result.=''. + &Apache::structuretags::problem_edit_buttons('editxml'); + + $result.='
'.&Apache::lonxml::message_location().'
'. + ' +
+
+
'.&Apache::loncommon::end_page(); + &Apache::lonxml::add_messages(\$result); + $request->print($result); + } + return ''; +} + +# +# Render the page in whatever target desired. +# +sub renderpage { + my ($request,$file,$targets,$return_string) = @_; + + my @targets = @{$targets || [&get_target()]}; + &Apache::lonhomework::showhashsubset(\%env,'form.'); + &Apache::lonxml::debug("Running targets ".join(':',@targets)); + + my $overall_result; + 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 $output=1; + if ($target eq 'no_output_web') { + $target = 'web'; $output=0; + } + my $problem=&Apache::lonnet::getfile($file); + my $result; + if ($problem eq -1) { + $problem=''; + my $filename=(split('/',$file))[-1]; + my $error = + &mt('Unable to find [_1]', + ''.$filename.''); + $result.= + &Apache::loncommon::simple_error_page($request,'Not available', + $error,{'no_auto_mt_msg'}); + return; + } + + my %mystyle; + if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); } + if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); } + if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');} + + &Apache::lonxml::debug("Should be parsing now"); + $result .= &Apache::lonxml::xmlparse($request, $target, $problem, + &setup_vars($target),%mystyle); + &finished_parsing(); + if (!$output) { $result = ''; } + #$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); + $overall_result.=$result; +# $request->rflush(); + } + #$request->print(":Result ends"); + #my $td=&tv_interval($t0); + } + if (!$return_string) { + &Apache::lonxml::add_messages(\$overall_result); + $request->print($overall_result); + $request->rflush(); + } else { + return $overall_result; + } +} + +sub finished_parsing { + undef($Apache::lonhomework::parsing_a_problem); + undef($Apache::lonhomework::parsing_a_task); +} + +sub get_template_list { + my ($extension) = @_; + my $result; + my @allnames; + &Apache::lonxml::debug("Looking for :$extension:"); + my $glob_extension = $extension; + if ($extension eq 'survey' || $extension eq 'exam') { + $glob_extension = 'problem'; + } + my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}. + '/templates/*.'.$glob_extension); + @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')), + (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')), + &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files); + @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files); + my ($midpoint,$seconddiv,$numfiles); + $numfiles = 0; + foreach my $file (@files) { + next if ($file->[1] !~ /\S/); + $numfiles ++; + } + if ($numfiles > 0) { + $result = '
'; + $midpoint = int($numfiles/2); + if ($numfiles%2) { + $midpoint ++; + } + } + my $count = 0; + my $currentcategory=''; + my $first = 1; + my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'}; + foreach my $file (@files) { + next if ($file->[1] !~ /\S/); + if ($file->[2] ne $currentcategory) { + $currentcategory=$file->[2]; + if ((!$seconddiv) && ($count >= $midpoint)) { + $result .= '
'."\n".'
'."\n"; + $seconddiv = 1; + } elsif (!$first) { + $result.='
'."\n"; + } else { + $first = 0; + } + $result.= '
'."\n" + .'

'.$currentcategory.'

'."\n"; + $count++; + } + $result .= + ''; + if ($file->[3]) { + $result.=&Apache::loncommon::help_open_topic($file->[3]); + } + my $filename=$file->[0]; + $filename=~s{^\Q$londocroot\E}{}; + $result.=' ' + .&Apache::loncommon::modal_link($filename.'?inhibitmenu=yes',&mt('Example'),600,420,'sample') + .'
'."\n"; + $count ++; + } + if ($numfiles > 0) { + $result .= '
'."\n".'
'."\n"; + } + return $result; +} + +sub newproblem { + my ($request) = @_; + + if ($env{'form.template'}) { + my $file = $env{'form.template'}; + my $dest = &Apache::lonnet::filelocation("",$request->uri); + &File::Copy::copy($file,$dest); + &renderpage($request,$dest); + return; + } + + my ($extension) = ($request->uri =~ m/\.(\w+)$/); + &Apache::lonxml::debug("Looking for :$extension:"); + my $templatelist=&get_template_list($extension); + if ($env{'form.newfile'} && !$templatelist) { + # no templates found + my $templatefilename = + $request->dir_config('lonIncludes').'/templates/blank.'.$extension; + &Apache::lonxml::debug("$templatefilename"); + my $dest = &Apache::lonnet::filelocation("",$request->uri); + &File::Copy::copy($templatefilename,$dest); + &renderpage($request,$dest); + } else { + my $url=&HTML::Entities::encode($request->uri,'<>&"'); + my $dest = &Apache::lonnet::filelocation("",$request->uri); + my $errormsg; + my $instructions; + my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri), + 'text' => 'Authoring Space'}, + {'href' => '', + 'text' => "Create New $extension"}]; + my $start_page = + &Apache::loncommon::start_page("Create New $extension", + undef, + {'bread_crumbs' => $brcrum,}); + $request->print( + $start_page + .&Apache::loncommon::head_subbox( + &Apache::loncommon::CSTR_pageheader()) + .'

'.&mt("Creating a new $extension resource.")."

+$errormsg +".&mt("The requested file [_1] currently does not exist.", + ''.$url.'').' +

+'.&mt("To create a new $extension, select a template from the". + " list below. Then click on the \"Create $extension\" button.").' +

'); + + if (defined($templatelist)) { + $request->print($templatelist); + } + $request->print('
'); + $request->print('
'.&Apache::loncommon::end_page()); + } + return; +} + +sub update_construct_style { + if ($env{'request.state'} eq "construct" + && $env{'form.problemmode'} eq 'view' + && defined($env{'form.submitted'}) + && !defined($env{'form.resetdata'}) + && !defined($env{'form.newrandomization'})) { + if ((!$env{'form.style_file'} && $env{'construct.style'}) + ||$env{'form.clear_style_file'}) { + &Apache::lonnet::delenv('construct.style'); + } elsif ($env{'form.style_file'} + && $env{'construct.style'} ne $env{'form.style_file'}) { + &Apache::lonnet::appenv({'construct.style' => + $env{'form.style_file'}}); + } + } +} + + +sub handler { + #my $t0 = [&gettimeofday()]; + my $request=$_[0]; + $Apache::lonxml::request=$request; + $Apache::lonxml::debug=$env{'user.debug'}; + $env{'request.uri'}=$request->uri; + &setuppermissions(); + + 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' && + $env{'request.state'} ne "construct") { + #should know where we are, so ask + &unset_permissions(); + $request->internal_redirect('/adm/ambiguous'); + return OK; + } + } + if (&setupheader($request)) { + &unset_permissions(); + return OK; + } + &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade"); + &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'}); + my ($symb) = &Apache::lonnet::whichuser(); + &Apache::lonxml::debug('symb is '.$symb); + if ($env{'request.state'} eq "construct") { + if ( -e $file ) { + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['problemmode']); + if (!(defined $env{'form.problemmode'})) { + #first visit to problem in construction space + $env{'form.problemmode'}= 'view'; + &renderpage($request,$file); + } elsif (($env{'form.problemmode'} eq 'editxml') || + ($env{'form.problemmode'} eq 'saveeditxml') || + ($env{'form.problemmode'} eq 'saveviewxml') || + ($env{'form.problemmode'} eq 'undoxml')) { + &editxmlmode($request,$file); + } elsif ($env{'form.problemmode'} eq 'calcanswers') { + &analyze($request,$file); + } else { + &update_construct_style(); + &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"); + # always turn off debug messages + $Apache::lonxml::debug=0; + &unset_permissions(); + return OK; }