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Diff for /loncom/homework/lonhomework.pm between versions 1.134 and 1.289

version 1.134, 2003/06/13 20:50:57 version 1.289, 2008/01/15 03:09:09
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 Apache::loncommon();  use Apache::loncommon();
 #use Time::HiRes qw( gettimeofday tv_interval );  use Apache::lonlocal;
   use Time::HiRes qw( gettimeofday tv_interval );
   use HTML::Entities();
   use File::Copy();
   
   # 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 (($env{'form.problemmode'} eq 'view') ||
        ($env{'form.problemmode'} eq 'discard')) {
    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 'edit') {
    if ( $env{'form.submitted'} eq 'edit' ) {
       if ( $env{'form.submitbutton'} eq &mt('Save 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 send_footer {  sub proctor_checked_in {
   my ($request)= @_;      my ($slot_name,$slot,$type)=@_;
 #  $request->print('</form>');      my @possible_proctors=split(",",$slot->{'proctor'});
   $request->print(&Apache::lontexconvert::footer());      
       return 1 if (!@possible_proctors);
   
       my $key;
       if ($type eq 'Task') {
    my $version=$Apache::lonhomework::history{'resource.0.version'};
    $key ="resource.$version.0.checkedin";
       } elsif ($type eq 'problem') {
    $key ='resource.0.checkedin';
       }
       # backward compatability, used to be username@domain, 
       # now is username:domain
       my $who = $Apache::lonhomework::history{$key};
       if ($who !~ /:/) {
    $who =~ tr/@/:/;
       }     
       foreach my $possible (@possible_proctors) { 
    if ($who eq $possible
       && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
       return 1;
    }
       }
       
       return 0;
 }  }
   
 $Apache::lonxml::browse='';  sub check_ip_acc {
       my ($acc)=@_;
       &Apache::lonxml::debug("acc is $acc");
       if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) { 
    return 1;
       }
       my $allowed=0;
       my $ip=$env{'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;
   }
   
   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 $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
       my $available = &Apache::lonnet::EXT("resource.0.available");
       my @slots= (split(':',$availablestudent),split(':',$available));
   
   #    if (!@slots) {
   # return ($status,$datemsg);
   #    }
       my $slotstatus='NOT_IN_A_SLOT';
       my ($returned_slot,$slot_name);
       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,$datemsg);      return ('CANNOT_ANSWER',
   }      &mt('is in this state due to author settings.'));
    }
   &Apache::lonxml::debug("checking for part :$id:");      } else {
   &Apache::lonxml::debug("time:".time);   return ($env{'form.problemstate'},
   foreach $temp ("opendate","duedate","answerdate") {   &mt('is in this state due to author settings.'));
     $lastdate = $date;      }
     $date = &Apache::lonnet::EXT("resource.$id.$temp");   }
     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");   &Apache::lonxml::debug("in construction ignoring dates");
     if ($thistype =~ /^(con_lost|no_such_host)/ ||   $status='CAN_ANSWER';
  $date     =~ /^(con_lost|no_such_host)/) {   $datemsg=&mt('is in under construction');
  $status='UNAVAILABLE';  # return ($status,$datemsg);
  $date="may open later.";      }
  return($status,$date);  
     }      &Apache::lonxml::debug("checking for part :$id:");
     if ($thistype eq 'date_interval') {      &Apache::lonxml::debug("time:".time);
  if ($temp eq 'opendate') {  
            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;      my ($symb)=&Apache::lonnet::whichuser();
         }      &Apache::lonxml::debug("symb:".$symb);
         if ($temp eq 'answerdate') {      #if ($env{'request.state'} ne "construct" && $symb ne '') {
            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;      if ($env{'request.state'} ne "construct") {
         }          my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
    my $allowed=&check_ip_acc($idacc);
    if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
       $status='INVALID_ACCESS';
       $date=&mt("can not be accessed from your location.");
       return($status,$date);
    }
   
    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")." $date";
    }
     }      }
     &Apache::lonxml::debug("found :$date: for :$temp:");      if ($status eq 'CAN_ANSWER' ||
     if ($date eq '') {   (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
       $date = "an unknown date"; $passed = 0;   #check #tries, and if correct.
     } elsif ($date eq 'con_lost') {   my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
       $date = "an indeterminate date"; $passed = 0;   my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
     } else {   if ( $tries eq '' ) { $tries = '0'; }
       if (time < $date) { $passed = 0; } else { $passed = 1; }   if ( $maxtries eq '' && 
       $date = localtime $date;       $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 'CANNOT_ANSWER'
       && &show_answer_problem_status()) {
       $status = 'SHOW_ANSWER';
    }
     }      }
     if (!$passed) { $type=$temp; last; }      if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
   }   my @interval=&Apache::lonnet::EXT("resource.$id.interval");
   &Apache::lonxml::debug("have :$type:$passed:");   &Apache::lonxml::debug("looking for interval @interval");
   if ($passed) {   if ($interval[0]) {
     $status='SHOW_ANSWER';      my $first_access=&Apache::lonnet::get_first_access($interval[1]);
     $datemsg=$date;      &Apache::lonxml::debug("looking for accesstime $first_access");
   } elsif ($type eq 'opendate') {      if (!$first_access) {
     $status='CLOSED';   $status='NOT_YET_VIEWED';
     $datemsg = "will open on $date";   my $due_date = &due_date($id);
   } elsif ($type eq 'duedate') {   my $seconds_left = $due_date - time;
     $status='CAN_ANSWER';   if ($seconds_left > $interval[0] || $due_date eq '') {
     $datemsg = "is due at $date";      $seconds_left = $interval[0];
   } elsif ($type eq 'answerdate') {   }
     $status='CLOSED';   $datemsg=&seconds_to_human_length($seconds_left);
     $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') &&    #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {    #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
Line 231  sub check_access { Line 523  sub check_access {
   #}    #}
   
   
   &Apache::lonxml::debug("sending back :$status:$datemsg:");      &Apache::lonxml::debug("sending back :$status:$datemsg:");
   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {      if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
     &Apache::lonxml::debug("should be allowed to browse a resource when closed");   &Apache::lonxml::debug("should be allowed to browse a resource when closed");
     $status='CAN_ANSWER';   $status='CAN_ANSWER';
     $datemsg='is closed but you are allowed to view it';   $datemsg=&mt('is closed but you are allowed to view it');
   }      }
   
   return ($status,$datemsg);      return ($status,$datemsg);
   }
   # this should work exactly like the copy in lonnavmaps.pm
   sub due_date {
       my ($part_id,$symb,$udom,$uname)=@_;
       my $date;
       my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
          $udom,$uname);
       &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
       my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
          $udom,$uname);
       &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
       if ($interval[0] =~ /\d+/) {
    my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
    &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
    if (defined($first_access)) {
       my $interval = $first_access+$interval[0];
       $date = (!$due_date || $interval < $due_date) ? $interval
                                                             : $due_date;
    } else {
       $date = $due_date;
    }
       } else {
    $date = $due_date;
       }
       return $date
   }
   
   sub seconds_to_human_length {
       my ($length)=@_;
   
       my $seconds=$length%60; $length=int($length/60);
       my $minutes=$length%60; $length=int($length/60);
       my $hours=$length%24;   $length=int($length/24);
       my $days=$length;
   
       my $timestr;
       if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
       if ($hours > 0) { $timestr.=($timestr?", ":"").
     &mt('[quant,_1,hour]',$hours); }
       if ($minutes > 0) { $timestr.=($timestr?", ":"").
       &mt('[quant,_1,minute]',$minutes); }
       if ($seconds > 0) { $timestr.=($timestr?", ":"").
       &mt('[quant,_1,second]',$seconds); }
       return $timestr;
 }  }
   
 sub showhash {  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 602  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))) { $error=1; }   if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
     if (!$error) {   if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");   if ((!$error) && (!&File::Copy::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 $js = &Apache::structuretags::setmode_javascript();
             <head><title>Analyzing a problem</title></head>      my $result =
             <body bgcolor="#FFFFFF">   &Apache::loncommon::start_page('Analyzing a problem',$js);
   
       $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" />              '<input type="hidden" name="problemmode" value="'.
             <input type="submit" name="problemmode" value="Edit" />              $env{'form.problemmode'}.'" />'.
             <hr />      &Apache::structuretags::remember_problem_state().'
             <input type="submit" name="submit" value="View" />              <div class="LC_edit_problem_analyze_header">
             <hr />              <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
             List of possible answers:              'onclick="javascript:setmode(this.form,'."'editxml'".')" />
               <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
               'onclick="javascript:setmode(this.form,'."'edit'".')" />
               <hr class="LC_edit_problem_divide" />
               <input type="button" name="submitmode" value="'.&mt("View").'" '.
               'onclick="javascript:setmode(this.form,'."'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 781  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($subresult);
  my @parts;   my @parts;
Line 410  sub analyze { Line 809  sub analyze {
     if ($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'));
       $request->print('<hr class="LC_edit_problem_divide" />'.&mt('List of possible answers').': ');
     foreach my $part (sort(keys(%allparts))) {      foreach my $part (sort(keys(%allparts))) {
  if (defined(@{ $overall{$part.'.answer'} })) {   if (defined(@{ $overall{$part.'.answer'} })) {
     my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });      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 874  sub analyze {
     return $result;      return $result;
 }  }
   
 sub editxmlmode {  {
   my ($request,$file) = @_;      my $show_problem_status;
   my $result;      sub reset_show_problem_status {
   my $problem=&Apache::lonnet::getfile($file);   undef($show_problem_status);
   if ($problem eq -1) {      }
     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");  
     $problem='';  
   }  
   if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {  
     my $error=&handle_save_or_undo($request,\$problem,  
    \$ENV{'form.editxmltext'});  
     if (!$error) { $problem=&Apache::lonnet::getfile($file); }  
   }  
   &Apache::lonhomework::showhashsubset(\%ENV,'^form');  
   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {  
     &Apache::lonhomework::showhashsubset(\%ENV,'^form');  
     $ENV{'form.problemmode'}='View';  
     &renderpage($request,$file);  
   } else {  
     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);  
     my $xml_help = '<table><tr><td>'.  
  &Apache::loncommon::help_open_topic("Problem_Editor_XML_Index",'Problem Editing Help')  
     .'</td><td>'.  
  &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',  
     undef,undef,600)  
     .'</td><td>'.  
         &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',  
     undef,undef,600)  
     .'</td></tr></table>';  
     if ($cols > 80) { $cols = 80; }  
     if ($cols < 70) { $cols = 70; }  
     if ($rows < 20) { $rows = 20; }  
     $result.='<html><body bgcolor="#FFFFFF">  
             <form name="lonhomework" method="POST" action="'.  
       $ENV{'request.uri'}.'">  
             <input type="hidden" name="problemmode" value="EditXML" />  
             <input type="submit" name="problemmode" value="Discard Edits and View" />  
             <input type="submit" name="problemmode" value="Edit" />  
             <hr />  
             <input type="submit" name="submit" value="Submit Changes" />  
             <input type="submit" name="submit" value="Submit Changes and View" />  
             <input type="submit" name="Undo" value="undo" />  
             <hr />  
             ' . $xml_help . '  
             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.  
       &HTML::Entities::encode($problem).'</textarea>  
             </form></body></html>';  
     $request->print($result);  
   }  
   return '';  
 }  
   
 sub renderpage {      sub set_show_problem_status {
   my ($request,$file) = @_;   my ($new_status) = @_;
    $show_problem_status = lc($new_status);
       }
   
   my (@targets) = &get_target();      sub hide_problem_status {
   &Apache::lonxml::debug("Running targets ".join(':',@targets));   return ($show_problem_status eq 'no'
   foreach my $target (@targets) {   || $show_problem_status eq 'no_feedback_ever');
     #my $t0 = [&gettimeofday()];      }
   
       sub show_problem_status {
    return ($show_problem_status eq 'yes'
    || $show_problem_status eq 'answer'
    || $show_problem_status eq '');
       }
       
       sub show_some_problem_status {
    return ($show_problem_status eq 'no');
       }
   
       sub show_no_problem_status {
    return ($show_problem_status eq 'no_feedback_ever');
       }
     
       sub show_answer_problem_status {
    return ($show_problem_status eq 'answer');
       }
   }
   
   sub editxmlmode {
       my ($request,$file) = @_;
       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,
          \$env{'form.editxmltext'});
    if (!$error) { $problem=&Apache::lonnet::getfile($file); }
       }
       &Apache::lonhomework::showhashsubset(\%env,'^form');
       if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
    &Apache::lonhomework::showhashsubset(\%env,'^form');
    $env{'form.problemmode'}='view';
    &renderpage($request,$file);
       } else {
    my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
    my $xml_help = '<table><tr><td>'.
       &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
       "Problem Editing Help").
       '</td><td>'.
          &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
                   '</td></tr></table>';
    if ($cols > 80) { $cols = 80; }
    if ($cols < 70) { $cols = 70; }
    if ($rows < 20) { $rows = 20; }
    my $js =
       &Apache::edit::js_change_detection(). 
       &Apache::loncommon::resize_textarea_js().
               &Apache::structuretags::setmode_javascript();
    my $only_body =  ($env{'environment.remote'} eq 'off')? 0 : 1;
    my $start_page = 
       &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
      {'no_auto_mt_title' => 1,
       'only_body'        => $only_body,
       'add_entries'      => {
    'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
    'onload'   => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
       }});
    $result.=$start_page.
       &renderpage($request,$file,['no_output_web'],1).
               '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
       &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
       &Apache::structuretags::remember_problem_state().'
               <div class="LC_edit_problem_editxml_header">
                 <table class="LC_edit_problem_header_title"><tr><td>
                  '.&mt('Problem Editing').&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'
                   </td><td align="right">
                     '.&Apache::loncommon::helpLatexCheatsheet().'
                   </td></tr>
                 </table>
                 <div class="LC_edit_problem_discards">
                   <input type="hidden" name="problemmode" value="editxml" />
                   <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
                   'onclick="javascript:setmode(this.form,'."'discard'".')" />
                   <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
                   <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
                 </div>
                 <div class="LC_edit_problem_saves">
                   <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'"  />
                   <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
                 </div>
                 <hr class="LC_edit_problem_divide" />
         '.&Apache::lonxml::message_location().'
               </div>
               '  . '
               <textarea '.&Apache::edit::element_change_detection().
                 ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
         ' name="editxmltext" id="LC_editxmltext">'.
         &HTML::Entities::encode($problem,'<>&"').'</textarea>
               <div id="LC_aftertextarea">
               </div>
               </form>'.&Apache::loncommon::end_page();
    &Apache::lonxml::add_messages(\$result);
    $request->print($result);
     }      }
       return '';
   }
   
     my %mystyle;  #
     my $result = '';  #    Render the page in whatever target desired.
     if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }  #
     if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }  sub renderpage {
     if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}      my ($request,$file,$targets,$return_string) = @_;
   
     &Apache::lonxml::debug("Should be parsing now");      my @targets = @{$targets || [&get_target()]};
     $result = &Apache::lonxml::xmlparse($request, $target, $problem,      &Apache::lonhomework::showhashsubset(\%env,'form.');
  &setup_vars($target),%mystyle);      &Apache::lonxml::debug("Running targets ".join(':',@targets));
     undef($Apache::lonhomework::parsing_a_problem);  
     #$request->print("Result follows:");      my $overall_result;
     if ($target eq 'modified') {      foreach my $target (@targets) {
       &handle_save_or_undo($request,\$problem,\$result);   # FIXME need to do something intelligent when a problem goes
           # from viewable to not viewable due to map conditions
    #&setuppermissions();
    #if (   $Apache::lonhomework::browse ne '2'
    #    && $Apache::lonhomework::browse ne 'F' ) {
    #    $request->print(" You most likely shouldn't see me.");
    #}
    #my $t0 = [&gettimeofday()];
    my $output=1;
    if ($target eq 'no_output_web') {
       $target = 'web'; $output=0;
    }
    my $problem=&Apache::lonnet::getfile($file);
    my $result;
    if ($problem eq -1) {
       $problem='';
       my $filename=(split('/',$file))[-1];
       my $error =
    "<b> ".&mt('Unable to find [_1]',
      ' <span class="LC_filename">'.$filename.'</span>')
    ."</b>";
       $result.=
    &Apache::loncommon::simple_error_page($request,'Not available',
         $error);
       return;
    }
   
    my %mystyle;
    if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
    if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
    if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
   
    &Apache::lonxml::debug("Should be parsing now");
    $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
        &setup_vars($target),%mystyle);
    &finished_parsing();
    if (!$output) { $result = ''; }
    #$request->print("Result follows:");
    if ($target eq 'modified') {
       &handle_save_or_undo($request,\$problem,\$result);
    } else {
       if ($target eq 'analyze') {
    $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
    undef(%Apache::lonhomework::analyze);
       }
       #my $td=&tv_interval($t0);
       #if ( $Apache::lonxml::debug) {
       #$result =~ s:</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);  
   }  
 }  }
   
 # with no arg it returns a HTML <option> list of the template titles  sub finished_parsing {
 # with one arg it returns the filename associated with the arg passed      undef($Apache::lonhomework::parsing_a_problem);
       undef($Apache::lonhomework::parsing_a_task);
   }
   
 sub get_template_list {  sub get_template_list {
   my ($namewanted,$extension) = @_;      my ($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>) {      my $glob_extension  = $extension;
     my $name=&Apache::lonnet::metadata($file,'title');      if ($extension eq 'survey' || $extension eq 'exam') {
     if ($namewanted && ($name eq $namewanted)) {   $glob_extension = 'problem';
       $result=$file;      }
       last;      my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
     } else {       '/templates/*.'.$glob_extension);
  if ($name) { push (@allnames, $name); }      @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title'))]} (@files);
       @files = sort {$a->[1] cmp $b->[1]} (@files);
       my ($midpoint,$seconddiv,$numfiles);
       $numfiles = 0;
       foreach my $file (@files) {
           next if ($file->[1] !~ /\S/);
           $numfiles ++;
       }
       if ($numfiles > 0) {
           $result = '<div class="LC_left_float">';
           $midpoint = int($numfiles/2);
           if ($numfiles%2) {
               $midpoint ++;
           }
     }      }
   }      my $count = 0;
   if (@allnames && !$result) {      foreach my $file (@files) {
     $result="<option>Select a $extension template</option>\n<option>".   next if ($file->[1] !~ /\S/);
  join('</option><option>',sort(@allnames)).'</option>';   $result .=
   }      '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
   return $result;      $file->[1].'</label><br />'."\n";
           $count ++;
           if ((!$seconddiv) && ($count >= $midpoint)) {
               $result .= '</div>'."\n".'<div class="LC_left_float">'."\n";
               $seconddiv = 1;
           }
       }
       if ($numfiles > 0) {
           $result .= '</div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
       }
       return $result;
 }  }
   
 sub newproblem {  sub newproblem {
     my ($request) = @_;      my ($request) = @_;
     my $extension=$request->uri;  
     $extension=~s:^.*\.([\w]+)$:$1:;      if ($env{'form.template'}) {
     &Apache::lonxml::debug("Looking for :$extension:");   my $file = $env{'form.template'};
     my $templatelist=&get_template_list('',$extension);  
     if ($ENV{'form.template'} &&  
  $ENV{'form.template'} ne "Select a $extension template") {  
  use File::Copy;  
  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);   &File::Copy::copy($file,$dest);
  &renderpage($request,$dest);   &renderpage($request,$dest);
     } elsif($ENV{'form.newfile'} && !$templatelist) {   return;
  # I don't like hard-coded filenames but for now, this will work.      }
  use File::Copy;  
       my ($extension) = ($request->uri =~ m/\.(\w+)$/);
       &Apache::lonxml::debug("Looking for :$extension:");
       my $templatelist=&get_template_list($extension);
       if ($env{'form.newfile'} && !$templatelist) {
    # no templates found
  my $templatefilename =   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);   &File::Copy::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'}) {  
     $errormsg='<p><font color="red">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 $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">        " list 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>");      $request->print($templatelist);
    }
    $request->print('<br /><input type="submit" name="newfile" value="'.
    &mt("Create $extension").'" />');
    $request->print("</form></p>".&Apache::loncommon::end_page());
       }
       return;
   }
   
   sub update_construct_style {
       if ($env{'request.state'} eq "construct"
    && $env{'form.problemmode'} eq 'view' 
    &&  defined($env{'form.submitted'})
    && !defined($env{'form.resetdata'})
    && !defined($env{'form.newrandomization'})) {
    if ((!$env{'form.style_file'} && $env{'construct.style'})
       ||$env{'form.clear_style_file'}) {
       &Apache::lonnet::delenv('construct\\.style');
    } elsif ($env{'form.style_file'} 
       && $env{'construct.style'} ne $env{'form.style_file'}) {
       &Apache::lonnet::appenv('construct.style' => 
           $env{'form.style_file'});
  }   }
  $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");  
  $request->print("</form></p></body>");  
     }      }
     return '';  
 }  }
   
 sub view_or_edit_menu {  
   my ($request) = @_;  
   my $url=$request->uri;  
   $request->print(<<EDITMENU);  
 <body bgcolor="#FFFFFF">  
 <form action="$url" method="POST">  
 Would you like to <input type="submit" name="problemmode" value="View"> or  
 <input type="submit" name="problemmode" value="Edit"> the problem.  
 </form>  
 </body>  
 EDITMENU  
 }  
   
 sub handler {  sub handler {
   #my $t0 = [&gettimeofday()];      #my $t0 = [&gettimeofday()];
   my $request=$_[0];      my $request=$_[0];
       $Apache::lonxml::request=$request;
   $Apache::lonxml::debug=$ENV{'user.debug'};      $Apache::lonxml::debug=$env{'user.debug'};
       $env{'request.uri'}=$request->uri;
   if (&setupheader($request)) { return OK; }      &setuppermissions();
   $ENV{'request.uri'}=$request->uri;  
       my $file=&Apache::lonnet::filelocation("",$request->uri);
   #setup permissions  
   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});      #check if we know where we are
   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});      if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");   # if we are browsing we might not be able to know where we are
   # some times multiple problemmodes are submitted, need to select   if ($Apache::lonhomework::browse ne 'F' && 
   # the last one      $env{'request.state'} ne "construct") {
   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});      #should know where we are, so ask
   if ( defined($ENV{'form.problemmode'}) &&      &unset_permissions();
        ref($ENV{'form.problemmode'}) ) {      $request->internal_redirect('/adm/ambiguous');
     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));      return OK;
     my $mode=$ENV{'form.problemmode'}->[-1];   }
     undef $ENV{'form.problemmode'};      }
     $ENV{'form.problemmode'}=$mode;      if (&setupheader($request)) {
   }   &unset_permissions();
   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});   return OK;
   my $file=&Apache::lonnet::filelocation("",$request->uri);      }
       &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
   #check if we know where we are      &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {       my ($symb) = &Apache::lonnet::whichuser();
     # if we are browsing we might not be able to know where we are      &Apache::lonxml::debug('symb is '.$symb);
     if ($Apache::lonhomework::browse ne 'F') {      if ($env{'request.state'} eq "construct") {
       #should know where we are, so ask   if ( -e $file ) {
       $request->internal_redirect('/adm/ambiguous'); return;      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
     }      ['problemmode']);
   }      if (!(defined $env{'form.problemmode'})) {
    #first visit to problem in construction space
   my ($symb) = &Apache::lonxml::whichuser();   $env{'form.problemmode'}= 'view';
   &Apache::lonxml::debug('symb is '.$symb);   &renderpage($request,$file);
   if ($ENV{'request.state'} eq "construct" || $symb eq '') {      } elsif ($env{'form.problemmode'} eq 'editxml') {
       if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||   &editxmlmode($request,$file);
   $ENV{'form.resetdata'} eq 'New Problem Variation' ) {      } elsif ($env{'form.problemmode'} eq 'calcanswers') {
   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();   &analyze($request,$file);
   &Apache::lonnet::tmpreset($symb,'',$domain,$name);      } else {
       }   &update_construct_style();
   }   &renderpage($request,$file);
   if ($ENV{'request.state'} eq "construct") {      }
     if ( -e $file ) {   } else {
       if (!(defined $ENV{'form.problemmode'})) {      # requested file doesn't exist in contruction space
  #first visit to problem in construction space      &newproblem($request);
  #&view_or_edit_menu($request);   }
  $ENV{'form.problemmode'}='View';  
  &renderpage($request,$file);  
       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {  
  &editxmlmode($request,$file);  
       } elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {  
  &analyze($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 $td seconds processing");
     &Apache::lonxml::debug("not construct");      # always turn off debug messages
     &renderpage($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.1.134  
changed lines
  Added in v.1.289

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