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Diff for /loncom/homework/lonhomework.pm between versions 1.132 and 1.278

version 1.132, 2003/05/23 06:45:45 version 1.278, 2007/10/30 00:17:09
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 50  use Apache::essayresponse(); Line 46  use Apache::essayresponse();
 use Apache::externalresponse();  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 Time::HiRes qw( gettimeofday tv_interval );  use Apache::lonlocal;
   use Time::HiRes qw( gettimeofday tv_interval );
   use Apache::lonnet();
   
   # FIXME - improve commenting
   
   
 BEGIN {  BEGIN {
   &Apache::lonxml::register_insert();      &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 {  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')) {  
       return ($ENV{'form.grade_target'});  
     } elsif ( defined($ENV{'form.grade_target'}  )   
  && ($Apache::lonhomework::viewgrades eq 'F' )) {  
       return ($ENV{'form.grade_target'});  
     }  
    
     if ( defined($ENV{'form.submitted'}) &&  
  ( !defined($ENV{'form.resetdata'}))) {  
       return ('grade', 'web');  
     } else {      } else {
       return ('web');   &Apache::lonxml::debug("form.grade_target <undefined>");
     }      }
   } elsif ($ENV{'request.state'} eq "construct") {      if (($env{'request.state'} eq "published") ||
     if ( defined($ENV{'form.grade_target'}) ) {   ($env{'request.state'} eq "uploaded")) {
       return ($ENV{'form.grade_target'});   if ( defined($env{'form.grade_target'}  ) 
     }       && ($env{'form.grade_target'} eq 'tex')) {
     if ( defined($ENV{'form.preview'})) {      return ($env{'form.grade_target'});
       if ( defined($ENV{'form.submitted'})) {   } elsif ( defined($env{'form.grade_target'}  ) 
  return ('grade', 'web');    && ($Apache::lonhomework::viewgrades eq 'F' )) {
       } else {      return ($env{'form.grade_target'});
  return ('web');   } elsif ( $env{'form.grade_target'} eq 'webgrade'
       }    && ($Apache::lonhomework::queuegrade eq 'F' )) {
     } else {      return ($env{'form.grade_target'});
       if ( $ENV{'form.problemmode'} eq 'View' ||   }
    $ENV{'form.problemmode'} eq 'Discard Edits and View') {   if ($env{'form.webgrade'} &&
  if ( defined($ENV{'form.submitted'}) &&      ($Apache::lonhomework::modifygrades eq 'F'
      (!defined($ENV{'form.resetdata'})) ) {       || $Apache::lonhomework::queuegrade eq 'F' )) {
   return ('grade', 'web','answer');      return ('grade','webgrade');
  } else {   }
   return ('web','answer');   if ( defined($env{'form.submitted'}) &&
  }       ( !defined($env{'form.newrandomization'}))) {
       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {      return ('grade', 'web');
  if ( $ENV{'form.submitted'} eq 'edit' ) {   } else {
   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {      return ('web');
     return ('modified','web','answer');   }
   } else {      } elsif ($env{'request.state'} eq "construct") {
     return ('modified','edit');   if ( defined($env{'form.grade_target'}) ) {
   }      return ($env{'form.grade_target'});
  } else {   }
   return ('edit');   if ( defined($env{'form.preview'})) {
  }      if ( defined($env{'form.submitted'})) {
       } else {   return ('grade', 'web');
  return ('web');      } else {
       }   return ('web');
       }
    } else {
       if ($env{'form.problemstate'} eq 'WEB_GRADE') {
    #$env{'form.webgrade'} = 'yes';
    return ('grade','webgrade','answer');
       } elsif ( $env{'form.problemmode'} eq &mt('View') ||
    $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
    if ( defined($env{'form.submitted'}) &&
        (!defined($env{'form.resetdata'})) &&
        (!defined($env{'form.newrandomization'}))) {
       return ('grade', 'web','answer');
    } else {
       return ('web','answer');
    }
       } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
         $env{'form.problemmode'} eq 'Edit') {
    if ( $env{'form.submitted'} eq 'edit' ) {
       if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
    return ('modified','web','answer');
       } else {
    return ('modified','no_output_web','edit');
       }
    } else {
       return ('no_output_web','edit');
    }
       } else {
    return ('web');
       }
    }
     }      }
   }      return ();
   return ();  
 }  }
   
 sub setup_vars {  sub setup_vars {
   my ($target) = @_;      my ($target) = @_;
   return ';'      return ';'
 #  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') {
     $request->print('<script language="JavaScript">    $request->print('<script language="JavaScript"> 
           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",            hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
                  "height=350,width=150,menubar=no");                   "height=350,width=150,menubar=no");
           </script>');            </script>');
   }      }
   }
   
   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 send_footer {  sub check_ip_acc {
   my ($request)= @_;      my ($acc)=@_;
 #  $request->print('</form>');      &Apache::lonxml::debug("acc is $acc");
   $request->print(&Apache::lontexconvert::footer());      if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) { 
    return 1;
       }
       my $allowed=0;
       my $ip=$env{'request.host'} || $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;
 }  }
   
 $Apache::lonxml::browse='';  sub check_slot_access {
       my ($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 ( $is_correct) {
    if ($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  # JB, 9/24/2002: Any changes in this function may require a change
 # in lonnavmaps::resource::getDateStatus.  # in lonnavmaps::resource::getDateStatus.
 sub check_access {  sub check_access {
   my ($id) = @_;      my ($id) = @_;
   my $date ='';      my $date ='';
   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'}) {
     &Apache::lonxml::debug("in construction ignoring dates");      if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
     $status='CAN_ANSWER';   if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' 
     $datemsg='is in under construction';   && &hide_problem_status())) {
     return ($status,$datemsg);      return ('CANNOT_ANSWER',
   }      &mt('is in this state due to author settings.'));
    }
       } else {
    return ($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 $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
    if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
       $status='INVALID_ACCESS';
       $date=&mt("can not be accessed from your location.");
       return($status,$date);
    }
   
    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') { $maxtries = '2'; } 
    if ($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())
      ||
      $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
       $status = 'CANNOT_ANSWER';
    }
       }
       if ($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);
    my $seconds_left = $due_date - time;
    if ($seconds_left > $interval || $due_date eq '') {
       $seconds_left = $interval;
    }
    $datemsg=&seconds_to_human_length($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("checking for part :$id:");  
   &Apache::lonxml::debug("time:".time);      &Apache::lonxml::debug("sending back :$status:$datemsg:");
   foreach $temp ("opendate","duedate","answerdate") {      if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
     $lastdate = $date;   &Apache::lonxml::debug("should be allowed to browse a resource when closed");
     $date = &Apache::lonnet::EXT("resource.$id.$temp");   $status='CAN_ANSWER';
     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");   $datemsg=&mt('is closed but you are allowed to view it');
     if ($thistype =~ /^(con_lost|no_such_host)/ ||      }
  $date     =~ /^(con_lost|no_such_host)/) {  
  $status='UNAVAILABLE';      return ($status,$datemsg);
  $date="may open later.";  }
  return($status,$date);  # this should work exactly like the copy in lonnavmaps.pm
     }  sub due_date {
     if ($thistype eq 'date_interval') {      my ($part_id,$symb,$udom,$uname)=@_;
  if ($temp eq 'opendate') {      my $date;
            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;      my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
         }         $udom,$uname);
         if ($temp eq 'answerdate') {      &Apache::lonxml::debug("looking for interval $part_id $symb $interval");
            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;      my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
         }         $udom,$uname);
     }      &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
     &Apache::lonxml::debug("found :$date: for :$temp:");      if ($interval =~ /\d+/) {
     if ($date eq '') {   my $first_access=&Apache::lonnet::get_first_access('map',$symb);
       $date = "an unknown date"; $passed = 0;   &Apache::lonxml::debug("looking for first_access $first_access");
     } elsif ($date eq 'con_lost') {   if (defined($first_access)) {
       $date = "an indeterminate date"; $passed = 0;      $interval = $first_access+$interval;
       $date = ($interval < $due_date)? $interval : $due_date;
    } else {
       $date = $due_date;
    }
     } else {      } else {
       if (time < $date) { $passed = 0; } else { $passed = 1; }   $date = $due_date;
       $date = localtime $date;  
     }      }
     if (!$passed) { $type=$temp; last; }      return $date
   }  }
   &Apache::lonxml::debug("have :$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, 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 '' ) { $maxtries = '2'; }   
     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }  
     # if (correct and show prob status) or excused then CANNOT_ANSWER  
     if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/  
  &&  
  lc($Apache::lonhomework::problemstatus) ne 'no')  
        ||  
        $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {  
  $status = 'CANNOT_ANSWER';  
     }  
   }  
   
   if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&  
       (!$Apache::lonhomework::history{"resource.0.outtoken"})) {  
       return ('UNCHECKEDOUT','needs to be checked out');  
   }  
   
   
   &Apache::lonxml::debug("sending back :$status:$datemsg:");  
   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {  
     &Apache::lonxml::debug("should be allowed to browse a resource when closed");  
     $status='CAN_ANSWER';  
     $datemsg='is closed but you are allowed to view it';  
   }  
   
   return ($status,$datemsg);  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) = @_;
   &showhashsubset(\%hash,'.');      &showhashsubset(\%hash,'.');
   return '';      return '';
 }  }
   
 sub showarray {  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 265  sub showarray { Line 597  sub showarray {
 }  }
   
 sub showhashsubset {  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($$hash{$resultkey}));
  } elsif ($$hash{$resultkey} =~ /HASH/ ) {   } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
     &Apache::lonxml::debug("$resultkey ---- $$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");
       }      return '';
     }  
   }  
   &Apache::lonxml::debug("\n<br />restored values^</br>\n");  
   return '';  
 }  }
   
 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::lonnet::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 ''
 }  }
   
 sub handle_save_or_undo {  sub handle_save_or_undo {
   my ($request,$problem,$result) = @_;      my ($request,$problem,$result) = @_;
   my $file    = &Apache::lonnet::filelocation("",$request->uri);      my $file    = &Apache::lonnet::filelocation("",$request->uri);
   my $filebak =$file.".bak";      my $filebak =$file.".bak";
   my $filetmp =$file.".tmp";      my $filetmp =$file.".tmp";
   my $error=0;  
   
   if ($ENV{'form.Undo'} eq 'undo') {  
     my $error=0;      my $error=0;
     if (!copy($file,$filetmp)) { $error=1; }      if ($env{'form.Undo'} eq &mt('undo')) {
     if ((!$error) && (!copy($filebak,$file))) { $error=1; }   my $error=0;
     if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }   if (!copy($file,$filetmp)) { $error=1; }
     if (!$error) {   if ((!$error) && (!copy($filebak,$file))) { $error=1; }
       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");   if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
     } else {   if (!$error) {
       $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");      &Apache::lonxml::info("<p><b>".
       $error=1;    &mt("Undid changes, Switched [_1] and [_2]",
     }        '<span class="LC_filename">'.$filebak.
   } else {        '</span>',
     my $fs=Apache::File->new(">$filebak");        '<span class="LC_filename">'.$file.
     if (defined($fs)) {        '</span>')."</b></p>");
       print $fs $$problem;   } else {
       $request->print("<b>Making Backup to $filebak</b><br />");      &Apache::lonxml::info("<p><span class=\"LC_error\">".
     } else {    &mt("Unable to undo, unable to switch [_1] and [_2]",
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");        '<span class="LC_filename">'.
       $error=2;        $filebak.'</span>',
     }        '<span class="LC_filename">'.
     my $fh=Apache::File->new(">$file");        $file.'</span>')."</span></p>");
     if (defined($fh)) {      $error=1;
       print $fh $$result;   }
       $request->print("<b>Saving Modifications to $file</b><br />");  
     } else {      } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");          &Apache::lonnet::correct_line_ends($result);
       $error|=4;   my $fs=Apache::File->new(">$filebak");
    if (defined($fs)) {
       print $fs $$problem;
       &Apache::lonxml::info("<b>".&mt("Making Backup to [_1]",
       '<span class="LC_filename">'.
       $filebak.'</span>').
     "</b>");
    } else {
       &Apache::lonxml::info("<span class=\"LC_error\">".
     &mt("Unable to make backup [_1]",
         '<span class="LC_filename">'.
         $filebak.'</span>')."</span>");
       $error=2;
    }
    my $fh=Apache::File->new(">$file");
    if (defined($fh)) {
       print $fh $$result;
       &Apache::lonxml::info("<b>".&mt("Saving Modifications to [_1]",
      '<span class="LC_filename">'.
       $file.'</span>' )."</b>");
    } else {
       &Apache::lonxml::info('<span class="LC_error">'.
     &mt("Unable to write to [_1]",
         '<span class="LC_filename">'.
         $file.'</span>').
     '</span>');
       $error|=4;
    }
     }      }
   }      return $error;
   return $error;  
 }  }
   
 sub analyze_header {  sub analyze_header {
     my ($request) = @_;      my ($request) = @_;
     my $result.='<html>      my $result =
             <head><title>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'},'<>&"').'">'.
             <input type="submit" name="problemmode" value="EditXML" />      &Apache::structuretags::remember_problem_state().'
             <input type="submit" name="problemmode" value="Edit" />              <div class="LC_edit_problem_analyze_header">
             <hr />              <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
             <input type="submit" name="submit" value="View" />              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
             <hr />              <hr class="LC_edit_problem_divide" />
             List of possible answers:  
               <input type="submit" name="submit" value="'.&mt("View").'" />
               <hr class="LC_edit_problem_divide" />
               </div>
             </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 386  sub analyze { Line 771  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($request,'Analyze Progress',   &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
       '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,
  '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($subresult);
  my @parts;   my @parts;
Line 410  sub analyze { Line 799  sub analyze {
     if ($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'   ) {
  push( @{ $overall{$part.'.answer'} },   foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
       [@{ $analyze{$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 = ['<span class="LC_error">'.&mt('Error').'</span>'];
    }
    $seedexample{join("\0",$part,$i,@{$answer_part})}=
       $thisseed;
    $i++;
       }
    }
    if (!keys(%{ $analyze{$part.'.answer'} })) {
       my $answer_part = 
    ['<span class="LC_error">'.&mt('Error').'</span>'];
       $seedexample{join("\0",$part,0,@{$answer_part})}=
    $thisseed;
       push( @{ $overall{$part.'.answer'}[0] },
     $answer_part);
    }
     }      }
  }   }
     }      }
     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,      &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
   'Analyzing Results');    &mt('Analyzing Results'));
     foreach my $part (keys(%allparts)) {      $request->print('<hr class="LC_edit_problem_divide" />'.&mt('List of possible answers').': ');
       foreach my $part (sort(keys(%allparts))) {
  if (defined(@{ $overall{$part.'.answer'} })) {   if (defined(@{ $overall{$part.'.answer'} })) {
     my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });      for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
     $request->print('<table><tr><td colspan="'.($num_cols+1).'">Part '.$part.'</td></tr>');   my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
     my %frequency;   $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part);
     foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {   if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
  $frequency{join("\0",@{ $answer })}++;      $request->print(&mt(' Answer [_1]',$i+1));
     }   }
     $request->print('<tr><td colspan="'.($num_cols).'">Answer</td><td>Frequency</td></tr>');   $request->print('</th></tr>');
     foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {   my %frequency;
  $request->print('<tr><td align="right">'.   foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
  join('</td><td align="right">',split("\0",$answer)).      $frequency{join("\0",@{ $answer })}++;
  '</td><td>('.$frequency{$answer}.   }
  ')</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))) {
       $request->print('<tr><td class="center">'.
       join('</td><td class="center">',split("\0",$answer)).
       '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.
       '</a></td></tr>');
    }
    $request->print('</table>');
     }      }
     $request->print('</table>');  
  } else {   } else {
     $request->print('<p>Part '.$part.      $request->print('<p>'.&mt('Response').' '.$part.' '.
     ' 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>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 449  sub analyze { Line 864  sub analyze {
     return $result;      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 '');
       }
       
       sub show_some_problem_status {
    return ($show_problem_status eq 'no');
       }
   
       sub show_no_problem_status {
    return ($show_problem_status eq 'no_feedback_ever');
       }
   }
   
 sub editxmlmode {  sub editxmlmode {
   my ($request,$file) = @_;      my ($request,$file) = @_;
   my $result;      my $result;
   my $problem=&Apache::lonnet::getfile($file);      my $problem=&Apache::lonnet::getfile($file);
   if ($problem eq -1) {      if ($problem eq -1) {
     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");   &Apache::lonxml::error("<b> ".&mt('Unable to find').
     $problem='';         " <i>$file</i></b>");
   }   $problem='';
   if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {      }
     my $error=&handle_save_or_undo($request,\$problem,      if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
    \$ENV{'form.editxmltext'});   my $error=&handle_save_or_undo($request,\$problem,
     if (!$error) { $problem=&Apache::lonnet::getfile($file); }         \$env{'form.editxmltext'});
   }   if (!$error) { $problem=&Apache::lonnet::getfile($file); }
   &Apache::lonhomework::showhashsubset(\%ENV,'^form');      }
   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {      &Apache::lonhomework::showhashsubset(\%env,'^form');
     &Apache::lonhomework::showhashsubset(\%ENV,'^form');      if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
     $ENV{'form.problemmode'}='View';   &Apache::lonhomework::showhashsubset(\%env,'^form');
     &renderpage($request,$file);   $env{'form.problemmode'}='View';
   } else {   &renderpage($request,$file);
     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);      } else {
     my $xml_help = '<table><tr><td>'.   my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
  &Apache::loncommon::help_open_topic("Problem_Editor_XML_Index",'Problem Editing Help')   my $xml_help = '<table><tr><td>'.
     .'</td><td>'.      &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
  &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',      "Problem Editing Help").
     undef,undef,600)      '</td><td>'.
     .'</td><td>'.         &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
         &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',                  '</td></tr></table>';
     undef,undef,600)   if ($cols > 80) { $cols = 80; }
     .'</td></tr></table>';   if ($cols < 70) { $cols = 70; }
     if ($cols > 80) { $cols = 80; }   if ($rows < 20) { $rows = 20; }
     if ($cols < 70) { $cols = 70; }   my $js =
     if ($rows < 20) { $rows = 20; }      &Apache::edit::js_change_detection(). 
     $result.='<html><body bgcolor="#FFFFFF">      &Apache::loncommon::resize_textarea_js();
             <form name="lonhomework" method="POST" action="'.   my $only_body =  ($env{'environment.remote'} eq 'off')? 0 : 1;
       $ENV{'request.uri'}.'">   my $start_page = 
             <input type="hidden" name="problemmode" value="EditXML" />      &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
             <input type="submit" name="problemmode" value="Discard Edits and View" />     {'no_auto_mt_title' => 1,
             <input type="submit" name="problemmode" value="Edit" />      'only_body'        => $only_body,
             <hr />      'add_entries'      => {
             <input type="submit" name="submit" value="Submit Changes" />   'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
             <input type="submit" name="submit" value="Submit Changes and View" />   'onload'   => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
             <input type="submit" name="Undo" value="undo" />      }});
             <hr />  
    $result.=$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().'
               <div class="LC_edit_problem_editxml_header">
               <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
               <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
               <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 class="LC_edit_problem_divide" />
               <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
               <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
               <hr class="LC_edit_problem_divide" />
               </div>
             ' . $xml_help . '              ' . $xml_help . '
             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.              <textarea '.&Apache::edit::element_change_detection().
       &HTML::Entities::encode($problem).'</textarea>                ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
             </form></body></html>';        ' name="editxmltext" id="LC_editxmltext">'.
     $request->print($result);        &HTML::Entities::encode($problem,'<>&"').'</textarea>
   }              <div id="LC_aftertextarea">
   return '';                  <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                   <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
               </div>
               </form>'.&Apache::loncommon::end_page();
    &Apache::lonxml::add_messages(\$result);
    $request->print($result);
       }
       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::lonxml::debug("Running targets ".join(':',@targets));      &Apache::lonhomework::showhashsubset(\%env,'form.');
   foreach my $target (@targets) {      &Apache::lonxml::debug("Running targets ".join(':',@targets));
     #my $t0 = [&gettimeofday()];  
     my $problem=&Apache::lonnet::getfile($file);      my $overall_result;
     if ($problem eq -1) {      foreach my $target (@targets) {
       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");   # FIXME need to do something intelligent when a problem goes
       $problem='';          # 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 $error =
    "<b> ".&mt('Unable to find [_1]',
      ' <span class="LC_filename">'.$filename.'</span>')
    ."</b>";
       $result.=
    &Apache::loncommon::simple_error_page($request,'Not available',
         $error);
       return;
    }
   
     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($target),%mystyle);   &finished_parsing();
     undef($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($request,\$problem,\$result);
    } else {
       if ($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:</body>::;
       #$result.="<br />Spent $td seconds processing target $target\n</body>";
       #}
   #    $request->print($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);   
    $request->rflush();   
     } else {      } else {
       if ($target eq 'analyze') {   return $overall_result;
  $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);  
  undef(%Apache::lonhomework::analyze);  
       }  
       #my $td=&tv_interval($t0);  
       #if ( $Apache::lonxml::debug) {  
  #$result =~ s:</body>::;  
  #$result.="<br />Spent $td seconds processing target $target\n</body>";  
       #}  
       $request->print($result);  
       $request->rflush();  
     }      }
     #$request->print(":Result ends");  }
     #my $td=&tv_interval($t0);  
   }  sub finished_parsing {
       undef($Apache::lonhomework::parsing_a_problem);
       undef($Apache::lonhomework::parsing_a_task);
 }  }
   
 # 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
 # with one arg it returns the filename associated with the arg passed  # with one arg it returns the filename associated with the arg passed
 sub get_template_list {  sub get_template_list {
   my ($namewanted,$extension) = @_;      my ($namewanted,$extension) = @_;
   my $result;      my $result;
   my @allnames;      my @allnames;
   &Apache::lonxml::debug("Looking for :$extension:");      &Apache::lonxml::debug("Looking for :$extension:");
   foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {      foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
     my $name=&Apache::lonnet::metadata($file,'title');   &Apache::lonxml::debug("Looking at $file");
     if ($namewanted && ($name eq $namewanted)) {   my $name=&Apache::lonnet::metadata($file,'title');
       $result=$file;   &Apache::lonxml::debug("Got a name $name");
       last;   if ($namewanted && ($name eq $namewanted)) {
     } else {      $result=$file;
  if ($name) { push (@allnames, $name); }      last;
    } else {
       if ($name) { push (@allnames, $name); }
    }
       }
       if (@allnames && !$result) {
    $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
       join('</option><option>',sort(@allnames)).'</option>';
     }      }
   }      return $result;
   if (@allnames && !$result) {  
     $result="<option>Select a $extension template</option>\n<option>".  
  join('</option><option>',sort(@allnames)).'</option>';  
   }  
   return $result;  
 }  }
   
 sub newproblem {  sub newproblem {
Line 574  sub newproblem { Line 1083  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 =
     $request->dir_config('lonIncludes').'/templates/blank.problem';      $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
  &Apache::lonxml::debug("$templatefilename");   &Apache::lonxml::debug("$templatefilename");
  my $dest = &Apache::lonnet::filelocation("",$request->uri);   my $dest = &Apache::lonnet::filelocation("",$request->uri);
  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">You did not select a template.</font></p>'."\n";      $errormsg='<p><span class="LC_error">'.&mt('You did not select a template.').'</span></p>'."\n";
  }   }
  my $instructions;   my $instructions;
  if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}   my $start_page = 
  $request->print(<<ENDNEWPROBLEM);      &Apache::loncommon::start_page("Create New $extension");
 <body bgcolor="#FFFFFF">   $request->print("
 <h1>Creating a new $extension resource</h1>  $start_page
   <h1>".&mt("Creating a new $extension resource.")."</h1>
 $errormsg  $errormsg
 The requested file <tt>$url</tt> currently does not exist.  ".&mt("The requested file [_1] currently does not exist.",
         "<tt>$shownurl</tt>")."
 <p>  <p>
 <b>To create a new $extension$instructions click on the "Create $extension" button.</b>  <b>
 </p>  ".&mt("To create a new $extension, select a template from the".
 <p><form action="$url" method="POST">        "pull-down menu below. Then click on the \"Create $extension\" button.")."</b>
 ENDNEWPROBLEM  </p><form action=\"$url\" method=\"POST\">");
   
  if (defined($templatelist)) {   if (defined($templatelist)) {
     $request->print("<select name=\"template\">$templatelist</select>");      $request->print("<select name=\"template\">$templatelist</select>");
  }   }
  $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"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 {  sub update_construct_style {
   my ($request) = @_;      if ($env{'request.state'} eq "construct"
   my $url=$request->uri;   && $env{'form.problemmode'} eq &mt('View') 
   $request->print(<<EDITMENU);   &&  defined($env{'form.submitted'})
 <body bgcolor="#FFFFFF">   && !defined($env{'form.resetdata'})
 <form action="$url" method="POST">   && !defined($env{'form.newrandomization'})) {
 Would you like to <input type="submit" name="problemmode" value="View"> or   if ((!$env{'form.style_file'} && $env{'construct.style'})
 <input type="submit" name="problemmode" value="Edit"> the problem.      ||$env{'form.clear_style_file'}) {
 </form>      &Apache::lonnet::delenv('construct\\.style');
 </body>   } elsif ($env{'form.style_file'} 
 EDITMENU      && $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];  
   
   $Apache::lonxml::debug=$ENV{'user.debug'};  
   
   if (&setupheader($request)) { return OK; }  
   $ENV{'request.uri'}=$request->uri;  
   
   #setup permissions  sub handler {
   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});      #my $t0 = [&gettimeofday()];
   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});      my $request=$_[0];
   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");      $Apache::lonxml::request=$request;
   # some times multiple problemmodes are submitted, need to select      $Apache::lonxml::debug=$env{'user.debug'};
   # the last one      $env{'request.uri'}=$request->uri;
   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});      &setuppermissions();
   if ( defined($ENV{'form.problemmode'}) &&      # some times multiple problemmodes are submitted, need to select
        ref($ENV{'form.problemmode'}) ) {      # the last one
     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));      if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
     my $mode=$ENV{'form.problemmode'}->[-1];   my $mode=$env{'form.problemmode'}->[-1];
     undef $ENV{'form.problemmode'};   undef $env{'form.problemmode'};
     $ENV{'form.problemmode'}=$mode;   $env{'form.problemmode'}=$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' && 
       #should know where we are, so ask      $env{'request.state'} ne "construct") {
       $request->internal_redirect('/adm/ambiguous'); return;      #should know where we are, so ask
     }      &unset_permissions();
   }      $request->internal_redirect('/adm/ambiguous');
       return OK;
   my ($symb) = &Apache::lonxml::whichuser();   }
   &Apache::lonxml::debug('symb is '.$symb);      }
   if ($ENV{'request.state'} eq "construct" || $symb eq '') {      if (&setupheader($request)) {
       if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||   &unset_permissions();
   $ENV{'form.resetdata'} eq 'New Problem Variation' ) {   return OK;
   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();      }
   &Apache::lonnet::tmpreset($symb,'',$domain,$name);      &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();
   if ($ENV{'request.state'} eq "construct") {      &Apache::lonxml::debug('symb is '.$symb);
     if ( -e $file ) {      if ($env{'request.state'} eq "construct") {
       if (!(defined $ENV{'form.problemmode'})) {   if ( -e $file ) {
  #first visit to problem in construction space      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
  #&view_or_edit_menu($request);      ['problemmode']);
  $ENV{'form.problemmode'}='View';      if (!(defined $env{'form.problemmode'})) {
  &renderpage($request,$file);   #first visit to problem in construction space
       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {   $env{'form.problemmode'}='View';
  &editxmlmode($request,$file);   &renderpage($request,$file);
       } elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {      } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
  &analyze($request,$file);       $env{'form.problemmode'} eq 'EditXML') {
       } else {   &editxmlmode($request,$file);
  &renderpage($request,$file);      } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
       }   &analyze($request,$file);
       } else {
    &update_construct_style();
    &renderpage($request,$file);
       }
    } else {
       # requested file doesn't exist in contruction space
       &newproblem($request);
    }
     } else {      } else {
       # requested file doesn't exist in contruction space   # just render the page normally outside of construction space
       &newproblem($request);   &Apache::lonxml::debug("not construct");
    &renderpage($request,$file);
     }      }
   } else {      #my $td=&tv_interval($t0);
     # just render the page normally outside of construction space      #&Apache::lonxml::debug("Spent $td seconds processing");
     &Apache::lonxml::debug("not construct");      # always turn off debug messages
     &renderpage($request,$file);      $Apache::lonxml::debug=0;
   }      &unset_permissions();
   #my $td=&tv_interval($t0);      return OK;
   #&Apache::lonxml::debug("Spent $td seconds processing");  
   # &Apache::lonhomework::send_footer($request);  
   # always turn off debug messages  
   $Apache::lonxml::debug=0;  
   return OK;  
   
 }  }
   
Removed from v.1.132  
changed lines
  Added in v.1.278

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
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.