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Diff for /loncom/homework/lonhomework.pm between versions 1.148 and 1.254

version 1.148, 2003/09/19 12:26:56 version 1.254, 2006/06/26 22:33:22
Line 24 Line 24
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # 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;  package Apache::lonhomework;
 use strict;  use strict;
 use Apache::style();  use Apache::style();
 use Apache::lonxml();  use Apache::lonxml();
 use Apache::lonnet();  use Apache::lonnet;
 use Apache::lonplot();  use Apache::lonplot();
 use Apache::inputtags();  use Apache::inputtags();
 use Apache::structuretags();  use Apache::structuretags();
Line 51  use Apache::externalresponse(); Line 47  use Apache::externalresponse();
 use Apache::rankresponse();  use Apache::rankresponse();
 use Apache::matchresponse();  use Apache::matchresponse();
 use Apache::chemresponse();  use Apache::chemresponse();
   use Apache::drawimage();
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use HTML::Entities();  use HTML::Entities();
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonlocal;  use Apache::lonlocal;
 #use Time::HiRes qw( gettimeofday tv_interval );  use Time::HiRes qw( gettimeofday tv_interval );
   use Apache::lonnet();
   
   # FIXME - improve commenting
   
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register_insert();      &Apache::lonxml::register_insert();
 }  }
   
   
   #
   # 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 {  sub get_target {
     if (($ENV{'request.state'} eq "published") ||      &Apache::lonxml::debug("request.state = $env{'request.state'}");
  ($ENV{'request.state'} eq "uploaded")) {      if( defined($env{'form.grade_target'})) {
  if ( defined($ENV{'form.grade_target'}  )    &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
      && ($ENV{'form.grade_target'} eq 'tex')) {      } else {
     return ($ENV{'form.grade_target'});   &Apache::lonxml::debug("form.grade_target <undefined>");
  } elsif ( defined($ENV{'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'}  ) 
   && ($Apache::lonhomework::viewgrades eq 'F' )) {    && ($Apache::lonhomework::viewgrades eq 'F' )) {
     return ($ENV{'form.grade_target'});      return ($env{'form.grade_target'});
  }   } elsif ( $env{'form.grade_target'} eq 'webgrade'
     && ($Apache::lonhomework::queuegrade eq 'F' )) {
  if ( defined($ENV{'form.submitted'}) &&      return ($env{'form.grade_target'});
      ( !defined($ENV{'form.resetdata'})) &&   }
      ( !defined($ENV{'form.newrandomization'}))) {   if ($env{'form.webgrade'} &&
       ($Apache::lonhomework::modifygrades eq 'F'
        || $Apache::lonhomework::queuegrade eq 'F' )) {
       return ('grade','webgrade');
    }
    if ( defined($env{'form.submitted'}) &&
        ( !defined($env{'form.resetdata'})) &&
        ( !defined($env{'form.newrandomization'}))) {
     return ('grade', 'web');      return ('grade', 'web');
  } else {   } else {
     return ('web');      return ('web');
  }   }
     } elsif ($ENV{'request.state'} eq "construct") {      } elsif ($env{'request.state'} eq "construct") {
  if ( defined($ENV{'form.grade_target'}) ) {   if ( defined($env{'form.grade_target'}) ) {
     return ($ENV{'form.grade_target'});      return ($env{'form.grade_target'});
  }   }
  if ( defined($ENV{'form.preview'})) {   if ( defined($env{'form.preview'})) {
     if ( defined($ENV{'form.submitted'})) {      if ( defined($env{'form.submitted'})) {
  return ('grade', 'web');   return ('grade', 'web');
     } else {      } else {
  return ('web');   return ('web');
     }      }
  } else {   } else {
     if ( $ENV{'form.problemmode'} eq 'View' ||      if ( $env{'form.problemmode'} eq &mt('View') ||
  $ENV{'form.problemmode'} eq 'Discard Edits and View') {   $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
  if ( defined($ENV{'form.submitted'}) &&   if ( defined($env{'form.submitted'}) &&
      (!defined($ENV{'form.resetdata'})) &&       (!defined($env{'form.resetdata'})) &&
      (!defined($ENV{'form.newrandomization'}))) {       (!defined($env{'form.newrandomization'}))) {
     return ('grade', 'web','answer');      return ('grade', 'web','answer');
  } else {   } else {
     return ('web','answer');      return ('web','answer');
  }   }
     } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {      } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
  if ( $ENV{'form.submitted'} eq 'edit' ) {        $env{'form.problemmode'} eq 'Edit') {
     if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {   if ( $env{'form.submitted'} eq 'edit' ) {
       if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
  return ('modified','web','answer');   return ('modified','web','answer');
     } else {      } else {
  return ('modified','edit');   return ('modified','no_output_web','edit');
     }      }
  } else {   } else {
     return ('edit');      return ('no_output_web','edit');
  }   }
     } else {      } else {
  return ('web');   return ('web');
Line 123  sub setup_vars { Line 147  sub setup_vars {
 #  return ';$external::target='.$target.';';  #  return ';$external::target='.$target.';';
 }  }
   
 sub send_header {  
     my ($request)= @_;  
     $request->print(&Apache::lontexconvert::header());  
 #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');  
 }  
   
 sub createmenu {  sub createmenu {
     my ($which,$request)=@_;      my ($which,$request)=@_;
     if ($which eq 'grade') {      if ($which eq 'grade') {
Line 139  sub createmenu { Line 157  sub createmenu {
     }      }
 }  }
   
 sub send_footer {  sub proctor_checked_in {
     my ($request)= @_;      my ($slot_name,$slot,$type)=@_;
 #  $request->print('</form>');      my @possible_proctors=split(",",$slot->{'proctor'});
     $request->print(&Apache::lontexconvert::footer());      
       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;
 }  }
   
 $Apache::lonxml::browse='';  $Apache::lonxml::browse='';
   sub check_ip_acc {
       my ($acc)=@_;
       &Apache::lonxml::debug("acc is $acc");
       if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) { 
    return 1;
       }
       my $allowed=0;
       my $ip=$ENV{'REMOTE_ADDR'};
       my $name;
       foreach my $pattern (split(',',$acc)) {
    $pattern =~ s/^\s*//;
    $pattern =~ s/\s*$//;
    if ($pattern =~ /\*$/) {
       #35.8.*
       $pattern=~s/\*//;
       if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
    } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
       #35.8.3.[34-56]
       my $low=$2;
       my $high=$3;
       $pattern=$1;
       if ($ip =~ /^\Q$pattern\E/) { 
    my $last=(split(/\./,$ip))[3];
    if ($last <=$high && $last >=$low) { $allowed=1; }
       }
    } elsif ($pattern =~ /^\*/) {
       #*.msu.edu
       $pattern=~s/\*//;
       if (!defined($name)) {
    use Socket;
    my $netaddr=inet_aton($ip);
    ($name)=gethostbyaddr($netaddr,AF_INET);
       }
       if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
    } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
       #127.0.0.1
       if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
    } else {
       #some.name.com
       if (!defined($name)) {
    use Socket;
    my $netaddr=inet_aton($ip);
    ($name)=gethostbyaddr($netaddr,AF_INET);
       }
       if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
    }
    if ($allowed) { last; }
       }
       return $allowed;
   }
   
   sub check_slot_access {
       my ($id,$type)=@_;
   
       # 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);
       }
   
       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 @slots=
    (split(':',&Apache::lonnet::EXT("resource.0.availablestudent")),
    split(':',&Apache::lonnet::EXT("resource.0.available")));
   
   #    if (!@slots) {
   # return ($status,$datemsg);
   #    }
       my $slotstatus='NOT_IN_A_SLOT';
       my ($returned_slot,$slot_name);
       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);
    if ($slot{'starttime'} < time &&
       $slot{'endtime'} > time &&
       &check_ip_acc($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("protoctor checked in");
    $slotstatus='CAN_ANSWER';
       }
   
       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');
       }
   
       # no slot is currently open, and has been checked in for this version
       # previous slot is therefore CLOSED, so therefore the problem is
       if (!defined($slot_name)
    && $checkedin 
    && $type eq 'problem') {
    return ('CLOSED',$datemsg);
       }
   
       if ($slotstatus eq 'NOT_IN_A_SLOT' 
    && $checkedin ) {
   
    if ($got_grade) {
       return ('SHOW_ANSWER');
    } else {
       return ('WAITING_FOR_GRADE');
    }
   
       }
       if ( $is_correct) {
    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  # JB, 9/24/2002: Any changes in this function may require a change
 # in lonnavmaps::resource::getDateStatus.  # in lonnavmaps::resource::getDateStatus.
Line 155  sub check_access { Line 363  sub check_access {
     my $status;      my $status;
     my $datemsg = '';      my $datemsg = '';
     my $lastdate = '';      my $lastdate = '';
     my $temp;  
     my $type;      my $type;
     my $passed;      my $passed;
   
     if ($ENV{'request.state'} eq "construct") {      if ($env{'request.state'} eq "construct") {
    if ($env{'form.problemstate'}) {
       if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
    if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
    lc($Apache::lonhomework::problemstatus) eq 'no')) {
       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");   &Apache::lonxml::debug("in construction ignoring dates");
  $status='CAN_ANSWER';   $status='CAN_ANSWER';
  $datemsg=&mt('is in under construction');   $datemsg=&mt('is in under construction');
  return ($status,$datemsg);  # return ($status,$datemsg);
     }      }
   
     &Apache::lonxml::debug("checking for part :$id:");      &Apache::lonxml::debug("checking for part :$id:");
     &Apache::lonxml::debug("time:".time);      &Apache::lonxml::debug("time:".time);
     foreach $temp ("opendate","duedate","answerdate") {  
  $lastdate = $date;      my ($symb)=&Apache::lonxml::whichuser();
  $date = &Apache::lonnet::EXT("resource.$id.$temp");      &Apache::lonxml::debug("symb:".$symb);
  my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");      #if ($env{'request.state'} ne "construct" && $symb ne '') {
  if ($thistype =~ /^(con_lost|no_such_host)/ ||      if ($env{'request.state'} ne "construct") {
     $date     =~ /^(con_lost|no_such_host)/) {   my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
     $status='UNAVAILABLE';   if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
     $date=&mt("may open later.");      $status='INVALID_ACCESS';
       $date=&mt("can not be accessed from your location.");
     return($status,$date);      return($status,$date);
  }   }
  if ($thistype eq 'date_interval') {  
     if ($temp eq 'opendate') {   foreach my $temp ("opendate","duedate","answerdate") {
  $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;      $lastdate = $date;
     }      if ($temp eq 'duedate') {
     if ($temp eq 'answerdate') {   $date = &due_date($id);
  $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;      } else {
     }   $date = &Apache::lonnet::EXT("resource.$id.$temp");
  }      }
  &Apache::lonxml::debug("found :$date: for :$temp:");      
  if ($date eq '') {      my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
     $date = &mt("an unknown date"); $passed = 0;      if ($thistype =~ /^(con_lost|no_such_host)/ ||
  } elsif ($date eq 'con_lost') {   $date     =~ /^(con_lost|no_such_host)/) {
     $date = &mt("an indeterminate date"); $passed = 0;   $status='UNAVAILABLE';
  } else {   $date=&mt("may open later.");
     if (time < $date) { $passed = 0; } else { $passed = 1; }   return($status,$date);
     $date = localtime $date;      }
  }      if ($thistype eq 'date_interval') {
  if (!$passed) { $type=$temp; last; }   if ($temp eq 'opendate') {
     }      $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
     &Apache::lonxml::debug("have :$type:$passed:");   }
     if ($passed) {   if ($temp eq 'answerdate') {
  $status='SHOW_ANSWER';      $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
  $datemsg=$date;   }
     } elsif ($type eq 'opendate') {      }
  $status='CLOSED';      &Apache::lonxml::debug("found :$date: for :$temp:");
  $datemsg = &mt("will open on")." $date";      if ($date eq '') {
     } elsif ($type eq 'duedate') {   $date = &mt("an unknown date"); $passed = 0;
  $status='CAN_ANSWER';      } elsif ($date eq 'con_lost') {
  $datemsg = &mt("is due at")." $date";   $date = &mt("an indeterminate date"); $passed = 0;
     } elsif ($type eq 'answerdate') {      } else {
  $status='CLOSED';   if (time < $date) { $passed = 0; } else { $passed = 1; }
  $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";   $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 = &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') {      if ($status eq 'CAN_ANSWER' ||
    (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
  #check #tries, and if correct.   #check #tries, and if correct.
  my $tries = $Apache::lonhomework::history{"resource.$id.tries"};   my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
  my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");   my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
  if ( $tries eq '' ) { $tries = '0'; }   if ( $tries eq '' ) { $tries = '0'; }
  if ( $maxtries eq '' ) { $maxtries = '2'; }    if ( $maxtries eq '' && 
  if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }       $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
    if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
  # if (correct and show prob status) or excused then CANNOT_ANSWER   # if (correct and show prob status) or excused then CANNOT_ANSWER
  if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/   if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
     &&      &&
Line 227  sub check_access { Line 466  sub check_access {
     $status = 'CANNOT_ANSWER';      $status = 'CANNOT_ANSWER';
  }   }
     }      }
       if ($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) {
       my $first_access=&Apache::lonnet::get_first_access('map');
       &Apache::lonxml::debug("looking for accesstime $first_access");
       if (!$first_access) {
    $status='NOT_YET_VIEWED';
    my $due_date = &due_date($id);
    $datemsg=&seconds_to_human_length($due_date-time);
       }
    }
       }
   
   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&    #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {    #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
Line 243  sub check_access { Line 495  sub check_access {
   
     return ($status,$datemsg);      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 $due_date");
       if (defined($interval)) {
    my $first_access=&Apache::lonnet::get_first_access('map',$symb);
    if (defined($first_access)) {
       $interval = $first_access+$interval;
       $date = ($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 {  sub showhash {
     my (%hash) = @_;      my (%hash) = @_;
Line 254  sub showarray { Line 548  sub showarray {
     my ($array)=@_;      my ($array)=@_;
     my $string="(";      my $string="(";
     foreach my $elm (@{ $array }) {      foreach my $elm (@{ $array }) {
  if (ref($elm)) {   if (ref($elm) eq 'ARRAY') {
     if ($elm =~ /ARRAY/ ) {      $string.=&showarray($elm);
  $string.=&showarray($elm);   } elsif (ref($elm) eq 'HASH') {
     }      $string.= "HASH --- \n<br />";
       $string.= &showhashsubset($elm,'.');
  } else {   } else {
     $string.="$elm,"      $string.="$elm,"
  }   }
Line 271  sub showhashsubset { Line 566  sub showhashsubset {
     my ($hash,$keyre) = @_;      my ($hash,$keyre) = @_;
     my $resultkey;      my $resultkey;
     foreach $resultkey (sort keys %$hash) {      foreach $resultkey (sort keys %$hash) {
  if ($resultkey =~ /$keyre/) {   if ($resultkey !~ /$keyre/) { next; }
     if (ref($$hash{$resultkey})) {   if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
  if ($$hash{$resultkey} =~ /ARRAY/ ) {      &Apache::lonxml::debug("$resultkey ---- ".
     &Apache::lonxml::debug("$resultkey ---- ".     &showarray($$hash{$resultkey}));
    &showarray($$hash{$resultkey}));   } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
  } elsif ($$hash{$resultkey} =~ /HASH/ ) {      &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
     &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");      &showhashsubset($$hash{$resultkey},'.');
     &showhashsubset($$hash{$resultkey},'.');   } else {
  } else {      &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
     &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");  
  }  
     } else {  
  &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");  
     }  
  }   }
     }      }
     &Apache::lonxml::debug("\n<br />restored values^</br>\n");      &Apache::lonxml::debug("\n<br />restored values^</br>\n");
Line 292  sub showhashsubset { Line 582  sub showhashsubset {
 }  }
   
 sub setuppermissions {  sub setuppermissions {
     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});      $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
     my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});      my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
     if (! $viewgrades &&       if (! $viewgrades && 
  exists($ENV{'request.course.sec'}) &&    exists($env{'request.course.sec'}) && 
  $ENV{'request.course.sec'} !~ /^\s*$/) {   $env{'request.course.sec'} !~ /^\s*$/) {
  $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.   $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                                                '/'.$ENV{'request.course.sec'});                                                 '/'.$env{'request.course.sec'});
     }      }
     $Apache::lonhomework::viewgrades = $viewgrades;      $Apache::lonhomework::viewgrades = $viewgrades;
     return ''  
       if ($Apache::lonhomework::browse eq 'F' && 
    $env{'form.devalidatecourseresdata'} eq 'on') {
    my (undef,$courseid) = &Apache::lonxml::whichuser();
    &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
         $env{"course.$courseid.domain"});
       }
   
       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 {  sub setupheader {
     my $request=$_[0];      my $request=$_[0];
     if ($ENV{'browser.mathml'}) {      &Apache::loncommon::content_type($request,'text/html');
  $request->content_type('text/xml');  
     } else {  
  $request->content_type('text/html');  
     }  
     $request->content_encoding('UTF-8');  
     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {      if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
  &Apache::loncommon::no_cache($request);   &Apache::loncommon::no_cache($request);
     }      }
   #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
   #  'lastrevisiondate'));
     $request->send_http_header;      $request->send_http_header;
     return OK if $request->header_only;      return OK if $request->header_only;
     return ''      return ''
Line 327  sub handle_save_or_undo { Line 648  sub handle_save_or_undo {
     my $filetmp =$file.".tmp";      my $filetmp =$file.".tmp";
     my $error=0;      my $error=0;
   
     if ($ENV{'form.Undo'} eq 'undo') {      &Apache::lonnet::correct_line_ends($result);
   
       if ($env{'form.Undo'} eq &mt('undo')) {
  my $error=0;   my $error=0;
  if (!copy($file,$filetmp)) { $error=1; }   if (!copy($file,$filetmp)) { $error=1; }
  if ((!$error) && (!copy($filebak,$file))) { $error=1; }   if ((!$error) && (!copy($filebak,$file))) { $error=1; }
  if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }   if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
  if (!$error) {   if (!$error) {
     $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");      &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
  } else {   } else {
     $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");      &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
     $error=1;      $error=1;
  }   }
     } else {      } else {
  my $fs=Apache::File->new(">$filebak");   my $fs=Apache::File->new(">$filebak");
  if (defined($fs)) {   if (defined($fs)) {
     print $fs $$problem;      print $fs $$problem;
     $request->print("<b>".&mt("Making Backup to").      &Apache::lonxml::info("<b>".&mt("Making Backup to").
     " $filebak</b><br />");    " $filebak</b>");
  } else {   } else {
     $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");      &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
     $error=2;      $error=2;
  }   }
  my $fh=Apache::File->new(">$file");   my $fh=Apache::File->new(">$file");
  if (defined($fh)) {   if (defined($fh)) {
     print $fh $$result;      print $fh $$result;
     $request->print("<b>".&mt("Saving Modifications to").      &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
     " $file</b><br />");    " $file</b>");
  } else {   } else {
     $request->print("<font color=\"red\" size=\"+1\"><b>".      &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
     &mt("Unable to write to")." $file</b></font>");    &mt("Unable to write to")." $file</b></font>");
     $error|=4;      $error|=4;
  }   }
     }      }
Line 364  sub handle_save_or_undo { Line 687  sub handle_save_or_undo {
   
 sub analyze_header {  sub analyze_header {
     my ($request) = @_;      my ($request) = @_;
     my $result.='<html>      my $result =
             <head><title>'.&mt("Analyzing a problem").'</title></head>   &Apache::loncommon::start_page('Analyzing a problem',undef);
             <body bgcolor="#FFFFFF">  
       $result .= 
    &Apache::lonxml::message_location().'
             <form name="lonhomework" method="POST" action="'.              <form name="lonhomework" method="POST" action="'.
     $ENV{'request.uri'}.'">      &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
       &Apache::structuretags::remember_problem_state().'
             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />              <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
             <hr />              <hr />
             <input type="submit" name="submit" value="'.&mt("View").'" />              <input type="submit" name="submit" value="'.&mt("View").'" />
             <hr />              <hr />
             '.&mt('List of possible answers').':  
             </form>';              </form>';
       &Apache::lonxml::add_messages(\$result);
     $request->print($result);      $request->print($result);
     $request->rflush();      $request->rflush();
 }  }
   
 sub analyze_footer {  sub analyze_footer {
     my ($request) = @_;      my ($request) = @_;
     my $result='</body></html>';      $request->print(&Apache::loncommon::end_page());
     $request->print($result);  
     $request->rflush();      $request->rflush();
 }  }
   
Line 392  sub analyze { Line 717  sub analyze {
     &Apache::lonxml::debug("Analyze");      &Apache::lonxml::debug("Analyze");
     my $result;      my $result;
     my %overall;      my %overall;
       my %seedexample;
     my %allparts;      my %allparts;
     my $rndseed=$ENV{'form.rndseed'};      my $rndseed=$env{'form.rndseed'};
     &analyze_header($request);      &analyze_header($request);
     my %prog_state=      my %prog_state=
  &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),   &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
       &mt('Getting Problem Variants'),        &mt('Getting Problem Variants'),
       $ENV{'form.numtoanalyze'});        $env{'form.numtoanalyze'},
     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {        'inline',undef);
       for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
  &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,   &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
  &mt('last problem'));   &mt('last problem'));
    if (&Apache::loncommon::connection_aborted($request)) { return; }
           my $thisseed=$i+$rndseed;
  my $subresult=&Apache::lonnet::ssi($request->uri,   my $subresult=&Apache::lonnet::ssi($request->uri,
    ('grade_target' => 'analyze'),     ('grade_target' => 'analyze'),
    ('rndseed' => $i+$rndseed));     ('rndseed' => $thisseed));
  (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);   (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
  my %analyze=&Apache::lonnet::str2hash($subresult);   my %analyze=&Apache::lonnet::str2hash($subresult);
  my @parts;   my @parts;
Line 416  sub analyze { Line 745  sub analyze {
     if ($analyze{$part.'.type'} eq 'numericalresponse' ||      if ($analyze{$part.'.type'} eq 'numericalresponse' ||
  $analyze{$part.'.type'} eq 'stringresponse' ||   $analyze{$part.'.type'} eq 'stringresponse' ||
  $analyze{$part.'.type'} eq 'formularesponse'   ) {   $analyze{$part.'.type'} eq 'formularesponse'   ) {
    my $concatanswer=join("\0",@{ $analyze{$part.'.answer'} });
    if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
       @{$analyze{$part.'.answer'}}=('<font color="red">'.&mt('Error').'</font>');
    }
  push( @{ $overall{$part.'.answer'} },   push( @{ $overall{$part.'.answer'} },
       [@{ $analyze{$part.'.answer'} }]);        [@{ $analyze{$part.'.answer'} }]);
                   $seedexample{join("\0",@{ $analyze{$part.'.answer'}})}=$thisseed;
     }      }
  }   }
     }      }
     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,      &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
   &mt('Analyzing Results'));    &mt('Analyzing Results'));
       $request->print('<hr />'.&mt('List of possible answers').': ');
     foreach my $part (sort(keys(%allparts))) {      foreach my $part (sort(keys(%allparts))) {
  if (defined(@{ $overall{$part.'.answer'} })) {   if (defined(@{ $overall{$part.'.answer'} })) {
     my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });      my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
     $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');      $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
     my %frequency;      my %frequency;
     foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {      foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
  $frequency{join("\0",@{ $answer })}++;   $frequency{join("\0",@{ $answer })}++;
     }      }
     $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');      $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
       .&mt('click for example').')</th></tr>');
     foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {      foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
  $request->print('<tr><td align="right">'.   $request->print('<tr><td class="center">'.
  join('</td><td align="right">',split("\0",$answer)).   join('</td><td class="center">',split("\0",$answer)).
  '</td><td>('.$frequency{$answer}.   '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{$answer}.'">'.$frequency{$answer}.
  ')</td></tr>');   '</a></td></tr>');
     }      }
     $request->print('</table>');      $request->print('</table>');
  } else {   } else {
     $request->print('<p>'.&mt('Part').' '.$part.' '.      $request->print('<p>'.&mt('Response').' '.$part.' '.
     &mt('is not analyzable at this time').'</p>');      &mt('is not analyzable at this time').'</p>');
  }   }
     }      }
     if (scalar(keys(%allparts)) == 0 ) {      if (scalar(keys(%allparts)) == 0 ) {
  $request->print('<p>'.&mt('Found no analyzable parts in this problem,   $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
                          currently only Numerical, Formula and String response  
                          styles are supported.').'</p>');  
     }      }
     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);      &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
     &analyze_footer($request);      &analyze_footer($request);
Line 464  sub editxmlmode { Line 798  sub editxmlmode {
        " <i>$file</i></b>");         " <i>$file</i></b>");
  $problem='';   $problem='';
     }      }
     if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {      if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
  my $error=&handle_save_or_undo($request,\$problem,   my $error=&handle_save_or_undo($request,\$problem,
        \$ENV{'form.editxmltext'});         \$env{'form.editxmltext'});
  if (!$error) { $problem=&Apache::lonnet::getfile($file); }   if (!$error) { $problem=&Apache::lonnet::getfile($file); }
     }      }
     &Apache::lonhomework::showhashsubset(\%ENV,'^form');      &Apache::lonhomework::showhashsubset(\%env,'^form');
     if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {      if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
  &Apache::lonhomework::showhashsubset(\%ENV,'^form');   &Apache::lonhomework::showhashsubset(\%env,'^form');
  $ENV{'form.problemmode'}='View';   $env{'form.problemmode'}='View';
  &renderpage($request,$file);   &renderpage($request,$file);
     } else {      } else {
  my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);   my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
  my $xml_help = Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",   my $xml_help = '<table><tr><td>'.
       "Problem Editing Help");      &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
       "Problem Editing Help").
       '</td><td>'.
          &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
                   '</td></tr></table>';
  if ($cols > 80) { $cols = 80; }   if ($cols > 80) { $cols = 80; }
  if ($cols < 70) { $cols = 70; }   if ($cols < 70) { $cols = 70; }
  if ($rows < 20) { $rows = 20; }   if ($rows < 20) { $rows = 20; }
  $result.='<html><body bgcolor="#FFFFFF">   my $start_page = 
             <form name="lonhomework" method="POST" action="'.      &Apache::loncommon::start_page("EditXML $file",
     $ENV{'request.uri'}.'">     &Apache::edit::js_change_detection());
   
    $result.=$start_page.
       &renderpage($request,$file,['no_output_web'],1).
       &Apache::lonxml::message_location().'
               <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
       &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
       &Apache::structuretags::remember_problem_state().'
             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />              <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
             <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />              <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />              <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
               <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
             <hr />              <hr />
             <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />              <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
             <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />              <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
             <input type="submit" name="Undo" value="'.&mt('undo').'" />  
             <hr />              <hr />
             ' . $xml_help . '              ' . $xml_help . '
             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.              <textarea '.&Apache::edit::element_change_detection().' style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
     &HTML::Entities::encode($problem).'</textarea>      &HTML::Entities::encode($problem,'<>&"').'</textarea><br />
             </form></body></html>';              <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
               <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
               </form>'.&Apache::loncommon::end_page();
    &Apache::lonxml::add_messages(\$result);
  $request->print($result);   $request->print($result);
     }      }
     return '';      return '';
 }  }
   
   #
   #    Render the page in whatever target desired.
   #
 sub renderpage {  sub renderpage {
     my ($request,$file) = @_;      my ($request,$file,$targets,$return_string) = @_;
   
     my (@targets) = &get_target();      my @targets = @{$targets || [&get_target()]};
       &Apache::lonhomework::showhashsubset(\%env,'form.');
     &Apache::lonxml::debug("Running targets ".join(':',@targets));      &Apache::lonxml::debug("Running targets ".join(':',@targets));
       my $overall_result;
     foreach my $target (@targets) {      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 $t0 = [&gettimeofday()];
    my $output=1;
    if ($target eq 'no_output_web') {
       $target = 'web'; $output=0;
    }
  my $problem=&Apache::lonnet::getfile($file);   my $problem=&Apache::lonnet::getfile($file);
    my $result;
  if ($problem eq -1) {   if ($problem eq -1) {
     &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");      my $filename=(split('/',$file))[-1];
       $result.="<b> ".&mt('Unable to find')." <i>$filename</i></b>";
     $problem='';      $problem='';
  }   }
   
  my %mystyle;   my %mystyle;
  my $result = '';  
  if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }   if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
  if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }   if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
  if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}   if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
   
  &Apache::lonxml::debug("Should be parsing now");   &Apache::lonxml::debug("Should be parsing now");
  $result = &Apache::lonxml::xmlparse($request, $target, $problem,   $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
     &setup_vars($target),%mystyle);       &setup_vars($target),%mystyle);
  undef($Apache::lonhomework::parsing_a_problem);   undef($Apache::lonhomework::parsing_a_problem);
    if (!$output) { $result = ''; }
  #$request->print("Result follows:");   #$request->print("Result follows:");
  if ($target eq 'modified') {   if ($target eq 'modified') {
     &handle_save_or_undo($request,\$problem,\$result);      &handle_save_or_undo($request,\$problem,\$result);
Line 537  sub renderpage { Line 903  sub renderpage {
     #$result =~ s:</body>::;      #$result =~ s:</body>::;
     #$result.="<br />Spent $td seconds processing target $target\n</body>";      #$result.="<br />Spent $td seconds processing target $target\n</body>";
     #}      #}
     $request->print($result);  #    $request->print($result);
     $request->rflush();      $overall_result.=$result;
   #    $request->rflush();
  }   }
  #$request->print(":Result ends");   #$request->print(":Result ends");
  #my $td=&tv_interval($t0);   #my $td=&tv_interval($t0);
     }      }
       if (!$return_string) {
    &Apache::lonxml::add_messages(\$overall_result);
    $request->print($overall_result);   
    $request->rflush();   
       } else {
    return $overall_result;
       }
 }  }
   
 # with no arg it returns a HTML <option> list of the template titles  # with no arg it returns a HTML <option> list of the template titles
Line 574  sub newproblem { Line 948  sub newproblem {
     $extension=~s:^.*\.([\w]+)$:$1:;      $extension=~s:^.*\.([\w]+)$:$1:;
     &Apache::lonxml::debug("Looking for :$extension:");      &Apache::lonxml::debug("Looking for :$extension:");
     my $templatelist=&get_template_list('',$extension);      my $templatelist=&get_template_list('',$extension);
     if ($ENV{'form.template'} &&      if ($env{'form.template'} &&
  $ENV{'form.template'} ne "Select a $extension template") {   $env{'form.template'} ne "Select a $extension template") {
  use File::Copy;   use File::Copy;
  my $file = &get_template_list($ENV{'form.template'},$extension);   my $file = &get_template_list($env{'form.template'},$extension);
  my $dest = &Apache::lonnet::filelocation("",$request->uri);   my $dest = &Apache::lonnet::filelocation("",$request->uri);
  copy($file,$dest);   copy($file,$dest);
  &renderpage($request,$dest);   &renderpage($request,$dest);
     } elsif($ENV{'form.newfile'} && !$templatelist) {      } elsif($env{'form.newfile'} && !$templatelist) {
  # I don't like hard-coded filenames but for now, this will work.   # I don't like hard-coded filenames but for now, this will work.
  use File::Copy;   use File::Copy;
  my $templatefilename =   my $templatefilename =
Line 591  sub newproblem { Line 965  sub newproblem {
  copy($templatefilename,$dest);   copy($templatefilename,$dest);
  &renderpage($request,$dest);   &renderpage($request,$dest);
     } else {      } else {
  my $url=$request->uri;   my $url=&HTML::Entities::encode($request->uri,'<>&"');
    my $shownurl=$url;
    $shownurl=~s-^/~-/priv/-;
  my $dest = &Apache::lonnet::filelocation("",$request->uri);   my $dest = &Apache::lonnet::filelocation("",$request->uri);
  my $errormsg;   my $errormsg;
  if ($ENV{'form.newfile'}) {   if ($env{'form.newfile'}) {
     $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";      $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
  }   }
  my $instructions;   my $instructions;
    my $start_page = 
       &Apache::loncommon::start_page("Create New $extension");
  if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}   if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
  my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',   my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
   'resource' => 'resource',    'resource' => 'resource',
Line 608  sub newproblem { Line 986  sub newproblem {
   'Create' => 'Create',    'Create' => 'Create',
   'button' => 'button');    'button' => 'button');
  $request->print(<<ENDNEWPROBLEM);   $request->print(<<ENDNEWPROBLEM);
 <body bgcolor="#FFFFFF">  $start_page
 <h1>$lt{'create'} $extension $lt{'resource'}</h1>  <h1>$lt{'create'} $extension $lt{'resource'}</h1>
 $errormsg  $errormsg
 $lt{'requested'} <tt>$url</tt> $lt{'not exist'}.  $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
 <p>  <p>
 <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>  <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
 </p>  </p>
Line 621  ENDNEWPROBLEM Line 999  ENDNEWPROBLEM
     $request->print("<select name=\"template\">$templatelist</select>");      $request->print("<select name=\"template\">$templatelist</select>");
  }   }
  $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");   $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
  $request->print("</form></p></body>");   $request->print("</form></p>".&Apache::loncommon::end_page());
     }      }
     return '';      return '';
 }  }
   
 sub view_or_edit_menu {  
     my ($request) = @_;  
     my $url=$request->uri;  
     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',  
       'view' => 'View',  
       'Edit' => 'edit',  
       'or' => 'or',  
       'the problem' => 'the problem');  
     $request->print(<<EDITMENU);  
 <body bgcolor="#FFFFFF">  
 <form action="$url" method="POST">  
 $lt{'would'} <input type="submit" name="problemmode" value="&lt{'view'}">  
 &lt{'or'} <input type="submit" name="problemmode" value="&lt{'Edit'}">  
 &lt{'the problem'}.  
 </form>  
 </body>  
 EDITMENU  
 }  
   
 sub handler {  sub handler {
     #my $t0 = [&gettimeofday()];      #my $t0 = [&gettimeofday()];
     my $request=$_[0];      my $request=$_[0];
           $Apache::lonxml::request=$request;
     $Apache::lonxml::debug=$ENV{'user.debug'};      $Apache::lonxml::debug=$env{'user.debug'};
       $env{'request.uri'}=$request->uri;
     if (&setupheader($request)) { return OK; }      &setuppermissions();
     $ENV{'request.uri'}=$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      # some times multiple problemmodes are submitted, need to select
     # the last one      # the last one
     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});      if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
     if ( defined($ENV{'form.problemmode'}) &&   my $mode=$env{'form.problemmode'}->[-1];
  ref($ENV{'form.problemmode'}) ) {   undef $env{'form.problemmode'};
  &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));   $env{'form.problemmode'}=$mode;
  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);      my $file=&Apache::lonnet::filelocation("",$request->uri);
   
     #check if we know where we are      #check if we know where we are
     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {       if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
  # if we are browsing we might not be able to know where we are   # if we are browsing we might not be able to know where we are
  if ($Apache::lonhomework::browse ne 'F') {   if ($Apache::lonhomework::browse ne 'F' && 
       $env{'request.state'} ne "construct") {
     #should know where we are, so ask      #should know where we are, so ask
     if ( &Apache::lonnet::mod_perl_version() == 2 ) {      &unset_permissions();
  &Apache::lonnet::cleanenv();      $request->internal_redirect('/adm/ambiguous');
     }      return OK;
     $request->internal_redirect('/adm/ambiguous'); return;  
  }   }
     }      }
       if (&setupheader($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::lonxml::whichuser();      my ($symb) = &Apache::lonxml::whichuser();
     &Apache::lonxml::debug('symb is '.$symb);      &Apache::lonxml::debug('symb is '.$symb);
     if ($ENV{'request.state'} eq "construct" || $symb eq '') {      if ($env{'request.state'} eq "construct") {
  if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||  
     $ENV{'form.resetdata'} eq 'New Problem Variation' ||  
     $ENV{'form.newrandomization'} eq 'New Randomization') {  
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();  
     &Apache::lonnet::tmpreset($symb,'',$domain,$name);  
     &Apache::lonxml::debug("Attempt reset");  
  }  
     }  
     if ($ENV{'request.state'} eq "construct") {  
  if ( -e $file ) {   if ( -e $file ) {
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
     ['problemmode']);      ['problemmode']);
     if (!(defined $ENV{'form.problemmode'})) {      if (!(defined $env{'form.problemmode'})) {
  #first visit to problem in construction space   #first visit to problem in construction space
  #&view_or_edit_menu($request);   $env{'form.problemmode'}='View';
  $ENV{'form.problemmode'}='View';  
  &renderpage($request,$file);   &renderpage($request,$file);
     } elsif ($ENV{'form.problemmode'} eq 'EditXML') {      } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
        $env{'form.problemmode'} eq 'EditXML') {
  &editxmlmode($request,$file);   &editxmlmode($request,$file);
     } elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {      } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
  &analyze($request,$file);   &analyze($request,$file);
     } else {      } else {
  &renderpage($request,$file);   &renderpage($request,$file);
Line 721  sub handler { Line 1067  sub handler {
     }      }
     #my $td=&tv_interval($t0);      #my $td=&tv_interval($t0);
     #&Apache::lonxml::debug("Spent $td seconds processing");      #&Apache::lonxml::debug("Spent $td seconds processing");
     # &Apache::lonhomework::send_footer($request);  
     # always turn off debug messages      # always turn off debug messages
     $Apache::lonxml::debug=0;      $Apache::lonxml::debug=0;
       &unset_permissions();
     return OK;      return OK;
   
 }  }
Removed from v.1.148  
changed lines
  Added in v.1.254

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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.