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Diff for /loncom/homework/lonhomework.pm between versions 1.111 and 1.178

version 1.111, 2003/02/26 17:52:14 version 1.178, 2004/07/03 20:23:20
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;
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::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 Time::HiRes qw( gettimeofday tv_interval );  #use Time::HiRes qw( gettimeofday tv_interval );
   
 BEGIN {  BEGIN {
   &Apache::lonxml::register_insert();      &Apache::lonxml::register_insert();
 }  }
   
 sub get_target {  sub get_target {
   if ( $ENV{'request.state'} eq "published") {      if (($ENV{'request.state'} eq "published") ||
     if ( defined($ENV{'form.grade_target'}  )    ($ENV{'request.state'} eq "uploaded")) {
  && ($ENV{'form.grade_target'} eq 'tex')) {   if ( defined($ENV{'form.grade_target'}  ) 
       return ($ENV{'form.grade_target'});       && ($ENV{'form.grade_target'} eq 'tex')) {
     } elsif ( defined($ENV{'form.grade_target'}  )       return ($ENV{'form.grade_target'});
  && ($Apache::lonhomework::viewgrades == 'F' )) {   } elsif ( defined($ENV{'form.grade_target'}  ) 
       return ($ENV{'form.grade_target'});    && ($Apache::lonhomework::viewgrades eq 'F' )) {
     }      return ($ENV{'form.grade_target'});
     }
     if ( defined($ENV{'form.submitted'})) {  
       return ('grade', 'web');  
     } else {  
       return ('web');  
     }  
   } elsif ($ENV{'request.state'} eq "construct") {  
     if ( defined($ENV{'form.grade_target'}) ) {  
       return ($ENV{'form.grade_target'});  
     }  
     if ( defined($ENV{'form.preview'})) {  
       if ( defined($ENV{'form.submitted'})) {  
  return ('grade', 'web');  
       } else {  
  return ('web');  
       }  
     } else {  
       if ( $ENV{'form.problemmode'} eq 'View' ||  
    $ENV{'form.problemmode'} eq 'Discard Edits and View') {  
  if ( defined($ENV{'form.submitted'}) &&   if ( defined($ENV{'form.submitted'}) &&
      (!defined($ENV{'form.resetdata'})) ) {       ( !defined($ENV{'form.resetdata'})) &&
   return ('grade', 'web','answer');       ( !defined($ENV{'form.newrandomization'}))) {
       return ('grade', 'web');
  } else {   } else {
   return ('web','answer');      return ('web');
    }
       } elsif ($ENV{'request.state'} eq "construct") {
    if ( defined($ENV{'form.grade_target'}) ) {
       return ($ENV{'form.grade_target'});
    }
    if ( defined($ENV{'form.preview'})) {
       if ( defined($ENV{'form.submitted'})) {
    return ('grade', 'web');
       } else {
    return ('web');
       }
    } else {
       if ( $ENV{'form.problemmode'} eq &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') ) {
    if ( $ENV{'form.submitted'} eq 'edit' ) {
       if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
    return ('modified','web','answer');
       } else {
    return ('modified','edit');
       }
    } else {
       return ('edit');
    }
       } else {
    return ('web');
       }
  }   }
       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {  
  if ( $ENV{'form.submitted'} eq 'edit' ) {  
   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {  
     return ('modified','web','answer');  
   } else {  
     return ('modified','edit');  
   }  
  } else {  
   return ('edit');  
  }  
       } else {  
  return ('web');  
       }  
     }      }
   }      return ();
   return ();  
 }  }
   
 sub setup_vars {  sub setup_vars {
   my ($target) = @_;      my ($target) = @_;
   return ';'      return ';'
 #  return ';$external::target='.$target.';';  #  return ';$external::target='.$target.';';
 }  }
   
 sub send_header {  sub send_header {
   my ($request)= @_;      my ($request)= @_;
   $request->print(&Apache::lontexconvert::header());      $request->print(&Apache::lontexconvert::header());
 #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');  #  $request->print('<form name='.$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 send_footer {  sub send_footer {
   my ($request)= @_;      my ($request)= @_;
 #  $request->print('</form>');  #  $request->print('</form>');
   $request->print(&Apache::lontexconvert::footer());      $request->print(&Apache::lontexconvert::footer());
 }  }
   
 $Apache::lonxml::browse='';  $Apache::lonxml::browse='';
   
   sub check_ip_acc {
       my ($acc)=@_;
       if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
       my $allowed=0;
       my $ip=$ENV{'REMOTE_ADDR'};
       my $name;
       foreach my $pattern (split(',',$acc)) {
    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 $allowed;
   }
 # JB, 9/24/2002: Any changes in this function may require a change  # JB, 9/24/2002: Any changes in this function may require a change
 # in lonnavmaps::resource::getDateStatus.  # in lonnavmaps::resource::getDateStatus.
 sub check_access {  sub check_access {
   my ($id) = @_;      my ($id) = @_;
   my $date ='';      my $date ='';
   my $status;      my $status;
   my $datemsg = '';      my $datemsg = '';
   my $lastdate = '';      my $lastdate = '';
   my $temp;      my $temp;
   my $type;      my $type;
   my $passed;      my $passed;
   
   if ($ENV{'request.state'} eq "construct") {      if ($ENV{'request.state'} eq "construct") {
     &Apache::lonxml::debug("in construction ignoring dates");   if ($ENV{'form.problemstate'}) {
     $status='CAN_ANSWER';      if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
     $datemsg='is in under construction';   if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
     return ($status,$datemsg);   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");
    $status='CAN_ANSWER';
    $datemsg=&mt('is in under construction');
   # return ($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 = $date;      if ($ENV{'request.state'} ne "construct") {
     $date = &Apache::lonnet::EXT("resource.$id.$temp");   my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");   if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
     if ($thistype =~ /^(con_lost|no_such_host)/ ||      $status='INVALID_ACCESS';
  $date     =~ /^(con_lost|no_such_host)/) {      $date=&mt("can not be accessed from your location.");
  $status='UNAVAILABLE';      return($status,$date);
  $date="may open later.";   }
  return($status,$date);  
     }   foreach $temp ("opendate","duedate","answerdate") {
     if ($thistype eq 'date_interval') {      $lastdate = $date;
  if ($temp eq 'opendate') {      $date = &Apache::lonnet::EXT("resource.$id.$temp");
            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;      my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
         }      if ($thistype =~ /^(con_lost|no_such_host)/ ||
         if ($temp eq 'answerdate') {   $date     =~ /^(con_lost|no_such_host)/) {
            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;   $status='UNAVAILABLE';
         }   $date=&mt("may open later.");
     }   return($status,$date);
     &Apache::lonxml::debug("found :$date: for :$temp:");      }
     if ($date eq '') {      if ($thistype eq 'date_interval') {
       $date = "an unknown date"; $passed = 0;   if ($temp eq 'opendate') {
     } elsif ($date eq 'con_lost') {      $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
       $date = "an indeterminate date"; $passed = 0;   }
     } else {   if ($temp eq 'answerdate') {
       if (time < $date) { $passed = 0; } else { $passed = 1; }      $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
       $date = localtime $date;   }
       }
       &Apache::lonxml::debug("found :$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 = 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') {
    #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.$id.solved"}=~/^correct/
       &&
       lc($Apache::lonhomework::problemstatus) ne 'no')
      ||
      $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
       $status = 'CANNOT_ANSWER';
    }
       }
       if ($status eq 'CAN_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';
    $datemsg=' '.$interval.' seconds';
       } else {
    my $newdate=localtime($first_access+$interval);
    if (time > ($first_access+$interval)) {
       $status='CLOSED';
       $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
    } else {
       $datemsg = &mt("is due at")." $newdate";
    }
       }
    }
       }
     #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
     #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
     #    return ('UNCHECKEDOUT','needs to be checked out');
     #}
   
   
       &Apache::lonxml::debug("sending back :$status:$datemsg:");
       if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
    &Apache::lonxml::debug("should be allowed to browse a resource when closed");
    $status='CAN_ANSWER';
    $datemsg=&mt('is closed but you are allowed to view it');
     }      }
     if (!$passed) { $type=$temp; last; }  
   }  
   &Apache::lonxml::debug("have :$type:$passed:");  
   if ($passed) {  
     $status='SHOW_ANSWER';  
     $datemsg=$date;  
   } elsif ($type eq 'opendate') {  
     $status='CLOSED';  
     $datemsg = "will open on $date";  
   } elsif ($type eq 'duedate') {  
     $status='CAN_ANSWER';  
     $datemsg = "is due at $date";  
   } elsif ($type eq 'answerdate') {  
     $status='CLOSED';  
     $datemsg = "was due on $lastdate, and answers will be available on $date";  
   }  
   if ($status eq 'CAN_ANSWER') {  
     #check #tries  
     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};  
     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");  
     if ( $tries eq '' ) { $tries = '0'; }  
     if ( $maxtries eq '' ) { $maxtries = '2'; }   
     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }   
   }  
   
   if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&  
       (!$Apache::lonhomework::history{"resource.0.outtoken"})) {  
       return ('UNCHECKEDOUT','needs to be checked out');  
   }  
   
   
   &Apache::lonxml::debug("sending back :$status:$datemsg:");  
   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {  
     &Apache::lonxml::debug("should be allowed to browse a resource when closed");  
     $status='CAN_ANSWER';  
     $datemsg='is closed but you are allowed to view it';  
   }  
   
   return ($status,$datemsg);      return ($status,$datemsg);
 }  }
   
 sub showhash {  sub showhash {
   my (%hash) = @_;      my (%hash) = @_;
   &showhashsubset(\%hash,'.');      &showhashsubset(\%hash,'.');
   return '';      return '';
 }  }
   
 sub showarray {  sub showarray {
Line 254  sub showarray { Line 352  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/) {
       if (ref($$hash{$resultkey})) {      if (ref($$hash{$resultkey})) {
  if ($$hash{$resultkey} =~ /ARRAY/ ) {   if ($$hash{$resultkey} =~ /ARRAY/ ) {
     &Apache::lonxml::debug("$resultkey ---- ".      &Apache::lonxml::debug("$resultkey ---- ".
    &showarray($$hash{$resultkey}));     &showarray($$hash{$resultkey}));
  } elsif ($$hash{$resultkey} =~ /HASH/ ) {   } elsif ($$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{$resultkey}");
  }   }
       } else {      } else {
  &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");   &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
       }      }
     }   }
   }      }
   &Apache::lonxml::debug("\n<br />restored values^</br>\n");      &Apache::lonxml::debug("\n<br />restored values^</br>\n");
   return '';      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'});
   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});      my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
   return ''      if (! $viewgrades && 
    exists($ENV{'request.course.sec'}) && 
    $ENV{'request.course.sec'} !~ /^\s*$/) {
    $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
                                                  '/'.$ENV{'request.course.sec'});
       }
       $Apache::lonhomework::viewgrades = $viewgrades;
       return ''
 }  }
   
 sub setupheader {  sub setupheader {
   my $request=$_[0];      my $request=$_[0];
   if ($ENV{'browser.mathml'}) {      if ($ENV{'browser.mathml'}) {
     $request->content_type('text/xml');   &Apache::loncommon::content_type($request,'text/xml');
   } else {      } else {
     $request->content_type('text/html');   &Apache::loncommon::content_type($request,'text/html');
   }      }
   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->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)) { $error=1; }  
     if ((!$error) && (!copy($filebak,$file))) { $error=1; }      &Apache::lonnet::correct_line_ends($result);
     if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }  
     if (!$error) {      if ($ENV{'form.Undo'} eq &mt('undo')) {
       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");   my $error=0;
     } else {   if (!copy($file,$filetmp)) { $error=1; }
       $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");   if ((!$error) && (!copy($filebak,$file))) { $error=1; }
       $error=1;   if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
     }   if (!$error) {
   } else {      &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
     my $fs=Apache::File->new(">$filebak");   } else {
     if (defined($fs)) {      &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
       print $fs $$problem;      $error=1;
       $request->print("<b>Making Backup to $filebak</b><br />");   }
     } else {  
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");  
       $error=2;  
     }  
     my $fh=Apache::File->new(">$file");  
     if (defined($fh)) {  
       print $fh $$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>");   my $fs=Apache::File->new(">$filebak");
       $error|=4;   if (defined($fs)) {
       print $fs $$problem;
       &Apache::lonxml::info("<b>".&mt("Making Backup to").
     " $filebak</b>");
    } else {
       &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
       $error=2;
    }
    my $fh=Apache::File->new(">$file");
    if (defined($fh)) {
       print $fh $$result;
       &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
     " $file</b>");
    } else {
       &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
     &mt("Unable to write to")." $file</b></font>");
       $error|=4;
    }
     }      }
   }      return $error;
   return $error;  
 }  }
   
 sub analyze_header {  sub analyze_header {
     my ($request) = @_;      my ($request) = @_;
     my $result.='<html>      my $result.='<html>
             <head><title>Analyzing a problem</title></head>              <head><title>'.&mt("Analyzing a problem").'</title></head>
             <body bgcolor="#FFFFFF">              <body bgcolor="#FFFFFF">'.&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" />              <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
             <input type="submit" name="problemmode" value="Edit" />              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
             <hr />              <hr />
             <input type="submit" name="submit" value="View" />              <input type="submit" name="submit" value="'.&mt("View").'" />
             <hr />              <hr />
             List of possible answers:  
             </form>';              </form>';
       &Apache::lonxml::add_messages(\$result);
     $request->print($result);      $request->print($result);
     $request->rflush();      $request->rflush();
 }  }
Line 370  sub analyze { Line 480  sub analyze {
     my %allparts;      my %allparts;
     my $rndseed=$ENV{'form.rndseed'};      my $rndseed=$ENV{'form.rndseed'};
     &analyze_header($request);      &analyze_header($request);
       my %prog_state=
    &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
         &mt('Getting Problem Variants'),
         $ENV{'form.numtoanalyze'},
         'inline',undef);
     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {      for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
    &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
    &mt('last problem'));
  my $subresult=&Apache::lonnet::ssi($request->uri,   my $subresult=&Apache::lonnet::ssi($request->uri,
    ('grade_target' => 'analyze'),     ('grade_target' => 'analyze'),
    ('rndseed' => $i));     ('rndseed' => $i+$rndseed));
  &Apache::lonxml::debug(":$subresult:");  
  (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);
  $Apache::lonxml::debug=1;   my @parts;
  &Apache::lonhomework::showhash(%analyze);   if (defined(@{ $analyze{'parts'} })) {
  $Apache::lonxml::debug=0;      @parts=@{ $analyze{'parts'} };
  my @parts = @{ $analyze{'parts'} };   }
  foreach my $part (@parts) {   foreach my $part (@parts) {
     if (!exists($allparts{$part})) {$allparts{$part}=1;};      if (!exists($allparts{$part})) {$allparts{$part}=1;};
     if ($analyze{$part.'.type'} eq 'numericalresponse' ||      if ($analyze{$part.'.type'} eq 'numericalresponse' ||
Line 391  sub analyze { Line 507  sub analyze {
     }      }
  }   }
     }      }
     foreach my $part (keys(%allparts)) {      &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
     &mt('Analyzing Results'));
       $request->print('<hr />'.&mt('List of possible answers').': ');
       foreach my $part (sort(keys(%allparts))) {
  if (defined(@{ $overall{$part.'.answer'} })) {   if (defined(@{ $overall{$part.'.answer'} })) {
     $request->print('<table><tr><td>Part '.$part.'</td></tr>');      my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
       $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
       my %frequency;
     foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {      foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
  $request->print('<tr><td>'.join('</td><td>',@{ $answer }).   $frequency{join("\0",@{ $answer })}++;
  '</td></tr>');      }
       $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
       foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
    $request->print('<tr><td align="right">'.
    join('</td><td align="right">',split("\0",$answer)).
    '</td><td>('.$frequency{$answer}.
    ')</td></tr>');
     }      }
     $request->print('</table>');      $request->print('</table>');
  } else {   } else {
     $request->print('<p>Part '.$part.      $request->print('<p>'.&mt('Response').' '.$part.' '.
     ' is not analyzabale at this time</p>');      &mt('is not analyzable at this time').'</p>');
  }   }
     }      }
       if (scalar(keys(%allparts)) == 0 ) {
    $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
       }
       &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
     &analyze_footer($request);      &analyze_footer($request);
     &Apache::lonhomework::showhash(%overall);      &Apache::lonhomework::showhash(%overall);
     return $result;      return $result;
 }  }
   
 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 ($problem == -1) {      if ($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');
     $ENV{'form.problemmode'}='View';      if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
     &renderpage($request,$file);   &Apache::lonhomework::showhashsubset(\%ENV,'^form');
   } else {   $ENV{'form.problemmode'}='View';
     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);   &renderpage($request,$file);
     my $xml_help = '<table><tr><td>'.      } else {
  &Apache::loncommon::help_open_topic("Problem_Editor_XML_Index",'Problem Editing Help')   my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
     .'</td><td>'.   my $xml_help = '<table><tr><td>'.
  &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',      &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
     undef,undef,600)      "Problem Editing Help").
     .'</td><td>'.      '</td><td>'.
         &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',         &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
     undef,undef,600)                  '</td></tr></table>';
     .'</td></tr></table>';   if ($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">'.
     $result.='<html><body bgcolor="#FFFFFF">      &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="hidden" name="problemmode" value="EditXML" />              <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
             <input type="submit" name="problemmode" value="Discard Edits and View" />              <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
             <input type="submit" name="problemmode" value="Edit" />              <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
             <hr />              <hr />
             <input type="submit" name="submit" value="Submit Changes" />              <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
             <input type="submit" name="submit" value="Submit Changes and View" />              <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
             <input type="submit" name="Undo" value="undo" />              <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
             <hr />              <hr />
             ' . $xml_help . '              ' . $xml_help . '
             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.              <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
       &HTML::Entities::encode($problem).'</textarea>      &HTML::Entities::encode($problem,'<>&"').'</textarea>
             </form></body></html>';              </form></body></html>';
     $request->print($result);   &Apache::lonxml::add_messages(\$result);
   }   $request->print($result);
   return '';      }
       return '';
 }  }
   
 sub renderpage {  sub renderpage {
   my ($request,$file) = @_;      my ($request,$file) = @_;
   
   my (@targets) = &get_target();      my (@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 $overall_result;
     my $problem=&Apache::lonnet::getfile($file);      foreach my $target (@targets) {
     if ($problem == -1) {   #my $t0 = [&gettimeofday()];
       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");   my $problem=&Apache::lonnet::getfile($file);
       $problem='';   if ($problem eq -1) {
     }      &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
       $problem='';
     my %mystyle;   }
     my $result = '';  
     if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }   my %mystyle;
     if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }   my $result = '';
     if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}   if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
    if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
     &Apache::lonxml::debug("Should be parsing now");   if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
     $result = &Apache::lonxml::xmlparse($request, $target, $problem,  
  &setup_vars($target),%mystyle);   &Apache::lonxml::debug("Should be parsing now");
    $result = &Apache::lonxml::xmlparse($request, $target, $problem,
     #$request->print("Result follows:");      &setup_vars($target),%mystyle);
     if ($target eq 'modified') {   undef($Apache::lonhomework::parsing_a_problem);
       &handle_save_or_undo($request,\$problem,\$result);   #$request->print("Result follows:");
     } else {   if ($target eq 'modified') {
       if ($target eq 'analyze') {      &handle_save_or_undo($request,\$problem,\$result);
  $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);   } else {
  undef(%Apache::lonhomework::analyze);      if ($target eq 'analyze') {
       }   $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
       #my $td=&tv_interval($t0);   undef(%Apache::lonhomework::analyze);
       #if ( $Apache::lonxml::debug) {      }
  #$result =~ s:</body>::;      #my $td=&tv_interval($t0);
  #$result.="<br />Spent $td seconds processing target $target\n</body>";      #if ( $Apache::lonxml::debug) {
       #}      #$result =~ s:</body>::;
       $request->print($result);      #$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);
     }      }
     #$request->print(":Result ends");      &Apache::lonxml::add_messages(\$overall_result);
     #my $td=&tv_interval($t0);      $request->print($overall_result);   
   }      $request->rflush();   
 }  }
   
 # 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');   my $name=&Apache::lonnet::metadata($file,'title');
     if ($namewanted && ($name eq $namewanted)) {   if ($namewanted && ($name eq $namewanted)) {
       $result=$file;      $result=$file;
       last;      last;
     } else {   } else {
  if ($name) { push (@allnames, $name); }      if ($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 type</option>\n<option>".  
       join('</option><option>',sort(@allnames)).'</option>';  
   }  
   return $result;  
 }  }
   
 sub newproblem {  sub newproblem {
Line 532  sub newproblem { Line 670  sub newproblem {
     my $extension=$request->uri;      my $extension=$request->uri;
     $extension=~s:^.*\.([\w]+)$:$1:;      $extension=~s:^.*\.([\w]+)$:$1:;
     &Apache::lonxml::debug("Looking for :$extension:");      &Apache::lonxml::debug("Looking for :$extension:");
       my $templatelist=&get_template_list('',$extension);
     if ($ENV{'form.template'} &&      if ($ENV{'form.template'} &&
  $ENV{'form.template'} ne "Select a $extension type") {   $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($ENV{'form.newfile'}) {      } elsif($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';      $request->dir_config('lonIncludes').'/templates/blank.problem';
  &Apache::lonxml::debug("$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 $templatelist=&get_template_list('',$extension);   my $url=&HTML::Entities::encode($request->uri,'<>&"');
  my $url=$request->uri;   my $shownurl=$url;
    $shownurl=~s-^/~-/priv/-;
  my $dest = &Apache::lonnet::filelocation("",$request->uri);   my $dest = &Apache::lonnet::filelocation("",$request->uri);
    my $errormsg;
    if ($ENV{'form.newfile'}) {
       $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
    }
  my $instructions;   my $instructions;
  if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}   my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
    if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
    my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
     'resource' => 'resource',
     'requested' => 'The requested file',
     'not exist' => 'currently does not exist',
     'createnew' => 'To create a new',
     'click' => 'click on the',
     'Create' => 'Create',
     'button' => 'button');
  $request->print(<<ENDNEWPROBLEM);   $request->print(<<ENDNEWPROBLEM);
 <body bgcolor="#FFFFFF">  $bodytag
 <h1>Creating a new $extension resource</h1>  <h1>$lt{'create'} $extension $lt{'resource'}</h1>
 The requested file <tt>$url</tt> currently does not exist.  $errormsg
   $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
 <p>  <p>
 To create a new $extension$instructions click on the "Create $extension" button.  <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
 </p>  </p>
 <p><form action="$url" method="POST">  <p><form action="$url" method="POST">
 ENDNEWPROBLEM  ENDNEWPROBLEM
  if (defined($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></body>");
     }      }
     return '';      return '';
 }  }
   
 sub view_or_edit_menu {  sub view_or_edit_menu {
   my ($request) = @_;      my ($request) = @_;
   my $url=$request->uri;      my $url=&HTML::Entities::encode($request->uri,'<>&"');
   $request->print(<<EDITMENU);      my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
         'view' => 'View',
         'Edit' => 'edit',
         'or' => 'or',
         'the problem' => 'the problem');
       $request->print(<<EDITMENU);
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
 <form action="$url" method="POST">  <form action="$url" method="POST">
 Would you like to <input type="submit" name="problemmode" value="View"> or  $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
 <input type="submit" name="problemmode" value="Edit"> the problem.  &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
   &lt{'the problem'}.
 </form>  </form>
 </body>  </body>
 EDITMENU  EDITMENU
 }  }
   
 sub handler {  sub handler {
   #my $t0 = [&gettimeofday()];      #my $t0 = [&gettimeofday()];
   my $request=$_[0];      my $request=$_[0];
       
 #  if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}      $Apache::lonxml::debug=$ENV{'user.debug'};
   $Apache::lonxml::debug=$ENV{'user.debug'};      if (&setupheader($request)) { return OK; }
       $ENV{'request.uri'}=$request->uri;
   if (&setupheader($request)) { return OK; }  
   $ENV{'request.uri'}=$request->uri;      #setup permissions
       $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
       $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
       &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
       # some times multiple problemmodes are submitted, need to select
       # the last one
       &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
       if ( defined($ENV{'form.problemmode'}) &&
    ref($ENV{'form.problemmode'}) ) {
    &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
    my $mode=$ENV{'form.problemmode'}->[-1];
    undef $ENV{'form.problemmode'};
    $ENV{'form.problemmode'}=$mode;
       }
       &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
       my $file=&Apache::lonnet::filelocation("",$request->uri);
   
       #check if we know where we are
       if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
    # if we are browsing we might not be able to know where we are
    if ($Apache::lonhomework::browse ne 'F' && 
       $ENV{'request.state'} ne "construct") {
       #should know where we are, so ask
       if ( &Apache::lonnet::mod_perl_version() == 2 ) {
    &Apache::lonnet::cleanenv();
       }
       $request->internal_redirect('/adm/ambiguous'); return;
    }
       }
   
   #setup permissions      my ($symb) = &Apache::lonxml::whichuser();
   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});      &Apache::lonxml::debug('symb is '.$symb);
   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});      if ($ENV{'request.state'} eq "construct" || $symb eq '') {
   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");   if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
   # some times multiple problemmodes are submitted, need to select      $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
   # the last one      $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
   if ( defined($ENV{'form.problemmode'}) &&      &Apache::lonnet::tmpreset($symb,'',$domain,$name);
        ref($ENV{'form.problemmode'}) ) {      &Apache::lonxml::debug("Attempt reset");
     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));   }
     my $mode=$ENV{'form.problemmode'}->[-1];      }
     undef $ENV{'form.problemmode'};      if ($ENV{'request.state'} eq "construct") {
     $ENV{'form.problemmode'}=$mode;   if ( -e $file ) {
   }      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});      ['problemmode']);
   my $file=&Apache::lonnet::filelocation("",$request->uri);      if (!(defined $ENV{'form.problemmode'})) {
    #first visit to problem in construction space
   #check if we know where we are   #&view_or_edit_menu($request);
   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {    $ENV{'form.problemmode'}='View';
     # if we are browsing we might not be able to know where we are   &renderpage($request,$file);
     if ($Apache::lonhomework::browse ne 'F') {      } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
       #should know where we are, so ask   &editxmlmode($request,$file);
       $request->internal_redirect('/adm/ambiguous'); return;      } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
     }   &analyze($request,$file);
   }      } else {
    &renderpage($request,$file);
   if ($ENV{'request.state'} eq "construct") {      }
     if ($ENV{'form.resetdata'} eq 'Reset Submissions') {   } else {
       my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();      # requested file doesn't exist in contruction space
       &Apache::lonnet::tmpreset($symb,'',$domain,$name);      &newproblem($request);
     }   }
     if ( -e $file ) {  
       if (!(defined $ENV{'form.problemmode'})) {  
  #first visit to problem in construction space  
  #&view_or_edit_menu($request);  
  $ENV{'form.problemmode'}='View';  
  &renderpage($request,$file);  
       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {  
  &editxmlmode($request,$file);  
       } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {  
  &analyze($request,$file);  
       } else {  
  &renderpage($request,$file);  
       }  
     } else {      } else {
       # requested file doesn't exist in contruction space   # just render the page normally outside of construction space
       &newproblem($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 $td seconds processing");
     &Apache::lonxml::debug("not construct");      # &Apache::lonhomework::send_footer($request);
     &renderpage($request,$file);      # always turn off debug messages
   }      $Apache::lonxml::debug=0;
   #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.1.111  
changed lines
  Added in v.1.178

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