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Diff for /loncom/homework/lonhomework.pm between versions 1.51 and 1.63

version 1.51, 2001/08/06 18:24:37 version 1.63, 2001/11/29 18:36:59
Line 1 Line 1
 # The LON-CAPA homework handler  # The LearningOnline Network with CAPA
 #   # The LON-CAPA Homework handler
 # Handles homework.  
 #  #
 # YEAR=2000  # $Id$
 # 7/25,8/2,8/7,8/8,8/11,9/14,9/19,10/2,10/5,10/11,11/7,11/21 Guy Albertelli  #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # Guy Albertelli
 # 11/30 Gerd Kortemeyer  # 11/30 Gerd Kortemeyer
 # 12/4,12/8,12/12,12/15,12/19,12/21 Guy Albertelli  # 6/1,8/17,8/18 Gerd Kortemeyer
 # YEAR=2001  
 # 1/6,1/8,1/9,1/10,1/11,1/12,1/15,1/25,2/7,2/13,2/19,4/16,4/26 Guy Albertelli  
 # 5/4,5/13,5/21 Guy Albertelli  
 # 6/1 Gerd Kortemeyer  
 # 6/5,6/12,6/26,7/2,7/18 Guy Albertelli  
 # 8/6 Scott Harrison  
   
 package Apache::lonhomework;  package Apache::lonhomework;
 use strict;  use strict;
Line 20  use Apache::lonxml; Line 36  use Apache::lonxml;
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::inputtags;  use Apache::inputtags;
 use Apache::structuretags;  use Apache::structuretags;
   use Apache::randomlabel;
 use Apache::response;  use Apache::response;
 use Apache::hint;  use Apache::hint;
 use Apache::outputtags;  use Apache::outputtags;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 #use Time::HiRes qw( gettimeofday tv_interval );  #use Time::HiRes qw( gettimeofday tv_interval );
   
 # ======================================================================= BEGIN  
 sub BEGIN {  sub BEGIN {
   &Apache::lonxml::register_insert();    &Apache::lonxml::register_insert();
 }  }
   
 # =============================================== Get target (returns an array)  
 sub get_target {  sub get_target {
     if ( $ENV{'request.state'} eq "published") {    if ( $ENV{'request.state'} eq "published") {
  if ( defined $ENV{'form.submitted'}) {      if ( defined($ENV{'form.submitted'})) {
     return ('grade','web');        return ('grade', 'web');
       } else {
         return ('web');
       }
     } elsif ($ENV{'request.state'} eq "construct") {
       if ( defined($ENV{'form.preview'})) {
         if ( defined($ENV{'form.submitted'})) {
    return ('grade', 'web');
         } else {
    return ('web');
         }
       } else {
         if ( $ENV{'form.problemmode'} eq 'View' ) {
    if ( defined($ENV{'form.submitted'}) &&
        (!defined($ENV{'form.resetdata'})) ) {
     return ('grade', 'web','answer');
  } else {   } else {
     return ('web');    return ('web','answer');
  }   }
     } elsif ($ENV{'request.state'} eq "construct") {        } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
  if ( defined $ENV{'form.preview'}) {   if ( $ENV{'form.submitted'} eq 'edit' ) {
     if ( defined $ENV{'form.submitted'}) {    return ('modified','edit');
  return ('grade','web');  
     } else {  
  return ('web');  
     }  
  } else {   } else {
     if ( $ENV{'form.problemmode'} eq 'View' ) {    return ('edit');
  if ( defined $ENV{'form.submitted'}) {  
     return ('grade','web');  
  } else {  
     return ('web');  
  }  
     } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {  
  if ( $ENV{'form.submitted'} eq 'edit' ) {  
     return ('modified','edit');  
  } else {  
     return ('edit');  
  }  
     } else {  
  return ('web');  
     }  
  }   }
         } else {
    return ('web');
         }
     }      }
     return ();    }
     return ();
 }  }
   
 # ===================================== Set up variables (return scalar string)  
 sub setup_vars {  sub setup_vars {
     my ($target) = @_;    my ($target) = @_;
     return ';'    return ';'
 #  return ';$external::target='.$target.';';  #  return ';$external::target='.$target.';';
 }  }
   
 # ================================================================= Send header  
 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.'">');
 }  }
   
 # ================================================================= Create menu  
 sub createmenu {  sub createmenu {
     my ($which,$request) = @_;    my ($which,$request)=@_;
     if ($which eq 'grade') {    if ($which eq 'grade') {
  $request->print('<script language="JavaScript">'."\n".      $request->print('<script language="JavaScript"> 
         'hwkmenu=window.open("/res/adm/pages/homeworkmenu.html'.            hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
       '","homeworkremote","height=350,width=150,menubar=no");'.                   "height=350,width=150,menubar=no");
       '</script>');            </script>');
     }    }
 }  }
   
 # ================================================================= Send footer  
 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='';
   
 # =============================================== Check date (returns an array)  sub check_access {
 sub check_date {    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 $passed;    &Apache::lonxml::debug("checking for part :$id:");
     &Apache::lonxml::debug("checking for part :$id:");    foreach $temp ("opendate","duedate","answerdate") {
     foreach $temp ("opendate","duedate","answerdate") {      $lastdate = $date;
  $lastdate = $date;      $date = &Apache::lonnet::EXT("resource.$id.$temp");
  $date = &Apache::lonnet::EXT("resource.$id.$temp");      &Apache::lonxml::debug("found :$date: for :$temp:");
  &Apache::lonxml::debug("found :$date: for :$temp:");      if ($date eq '') {
  if ($date eq '') {        $date = "an unknown date"; $passed = 0;
     $date = "an unknown date"; $passed = 0;      } elsif ($date eq 'con_lost') {
  } elsif ($date eq 'con_lost') {        $date = "an indeterminate date"; $passed = 0;
     $date = "an indeterminate date"; $passed = 0;      } else {
  } else {        if (time < $date) { $passed = 0; } else { $passed = 1; }
     if (time < $date) { $passed = 0; } else { $passed = 1; }        $date = localtime $date;
     $date = localtime $date;  
  }  
  if (!$passed) { $type = $temp; last; }  
     }  
     &Apache::lonxml::debug("have :$type:$passed:");  
     if ($passed) {  
  $status = 'SHOW_ANSWER';  
  $datemsg = $date;  
     } elsif ($type eq 'opendate') {  
  $status = 'CLOSED';  
  $datemsg = "will open on $date";  
     } elsif ($type eq 'duedate') {  
  $status = 'CAN_ANSWER';  
  $datemsg = "is due at $date";  
     } elsif ($type eq 'answerdate') {  
  $status = 'CLOSED';  
  $datemsg = "was due on $lastdate, and answers will be available on ".  
            "$date";  
     }  
     if ($status eq 'CAN_ANSWER') {  
  #check #tries  
  my $tries = $Apache::lonhomework::history{"resource.$id.tries"};  
  my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");  
  if ( $tries eq '' ) { $tries = '0'; }  
  if ( $maxtries eq '' ) { $maxtries = '2'; }   
  if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }   
     }  
     &Apache::lonxml::debug("sending back :$status:$datemsg:");  
     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {  
  &Apache::lonxml::debug("should be allowed to browse a resource when ".  
        "closed");  
  $status = 'CAN_ANSWER';  
  $datemsg = 'is closed but you are allowed to view it';  
     }  
     if ($ENV{'request.state'} eq "construct") {  
  &Apache::lonxml::debug("in construction ignoring dates");  
  $status = 'CAN_ANSWER';  
  $datemsg = 'is in under construction';  
     }      }
     return ($status,$datemsg);      if (!$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';
       $datemsg='is closed but you are allowed to view it';
     }
     if ($ENV{'request.state'} eq "construct") {
       &Apache::lonxml::debug("in construction ignoring dates");
       $status='CAN_ANSWER';
       $datemsg='is in under construction';
     }
     return ($status,$datemsg);
 }  }
   
 # ================================================================== Shows hash  
 sub showhash {  sub showhash {
     my (%hash) = @_;    my (%hash) = @_;
     my $resultkey;    my $resultkey;
     foreach $resultkey (sort keys %hash) {    foreach $resultkey (sort keys %hash) {
  &Apache::lonxml::debug("$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 '';
 }  }
   
 # =========================================================== Setup permissions  
 sub setuppermissions {  sub setuppermissions {
     $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',    $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
      $ENV{'request.filename'});    $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
     $Apache::lonhomework::viewgrades = &Apache::lonnet::allowed('vgr',    return ''
     $ENV{'request.course.id'});  
     return '';  
 }  }
   
 # ================================================================ Setup header  
 sub setupheader {  sub setupheader {
     my $request = $_[0];    my $request=$_[0];
     if ($ENV{'browser.mathml'}) {    if ($ENV{'browser.mathml'}) {
  $request->content_type('text/xml');      $request->content_type('text/xml');
     } else {    } else {
  $request->content_type('text/html');      $request->content_type('text/html');
     }    }
     $request->send_http_header;    &Apache::loncommon::no_cache($request);
     return OK if $request->header_only;    $request->send_http_header;
     return '';    return OK if $request->header_only;
     return ''
 }  }
   
 # ========================================================= Handle save or undo  
 sub handle_save_or_undo {  sub handle_save_or_undo {
     my ($request,$problem,$result) = @_;    my ($request,$problem,$result) = @_;
     my $fileout = &Apache::lonnet::filelocation("",$request->uri);    my $fileout = &Apache::lonnet::filelocation("",$request->uri);
     my $filesave = $fileout.".bak";    my $filesave=$fileout.".bak";
     if ($ENV{'form.Undo'} eq 'undo') {  
  if (copy($filesave,$fileout)) {    if ($ENV{'form.Undo'} eq 'undo') {
     $request->print("<b>Undid changes, Copied $filesave to $fileout".      if (copy($filesave,$fileout)) {
     "<br /></b>");        $request->print("<b>Undid changes, Copied $filesave to $fileout<br /></b>");
  } else {  
     $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".  
     "undo, unable to copy $filesave to $fileout<br ".  
     "/></b></font>");  
  }  
     } else {      } else {
  my $fs=Apache::File->new(">$filesave");        $request->print("<font color=\"red\" size=\"+1\"><b>Unable to undo, unable to copy $filesave to $fileout<br /></b></font>");
  if (defined($fs)) {      }
     print $fs $$problem;    } else {
     $request->print("<b>Making Backup to $filesave</b><br />");      my $fs=Apache::File->new(">$filesave");
  } else {      if (defined($fs)) {
     $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".        print $fs $$problem;
     "make backup $filesave</b></font>");        $request->print("<b>Making Backup to $filesave</b><br />");
  }      } else {
  my $fh=Apache::File->new(">$fileout");        $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filesave</b></font>");
  if (defined($fh)) {      }
     print $fh $$result;      my $fh=Apache::File->new(">$fileout");
     $request->print("<b>Saving Modifications to $fileout</b><br />");      if (defined($fh)) {
  } else {        print $fh $$result;
     $request->print("<font color=\"red\" size=\"+1\"><b>Unable to ".        $request->print("<b>Saving Modifications to $fileout</b><br />");
     "write to $fileout</b></font>");      } else {
  }        $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $fileout</b></font>");
     }      }
     }
 }  }
   
 # ================================================================= Render page  
 sub renderpage {  sub renderpage {
     my ($request,$file) = @_;    my ($request,$file) = @_;
       
     my (@targets) = &get_target();    my (@targets) = &get_target();
     foreach my $target (@targets) {    foreach my $target (@targets) {
  #my $t0 = [&gettimeofday()];      #my $t0 = [&gettimeofday()];
  my $problem=&Apache::lonnet::getfile($file);      my $problem=&Apache::lonnet::getfile($file);
  if ($problem == -1) {      if ($problem == -1) {
     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");        &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
     $problem='';        $problem='';
  }      }
   
  my %mystyle;      my %mystyle;
  my $result = '';      my $result = '';
  &Apache::inputtags::initialize_inputtags;      &Apache::inputtags::initialize_inputtags;
  &Apache::edit::initialize_edit;      &Apache::edit::initialize_edit;
  %Apache::lonhomework::results=();      if ($target eq 'web') {
  %Apache::lonhomework::history=&Apache::lonnet::restore();        if (&Apache::lonnet::symbread() eq '') {
  #ignore error conditions   if ($ENV{'request.state'} eq "construct") {
  my ($temp)=keys %Apache::lonhomework::history ;  
  if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }   
  if ($target eq 'web') {  
     if (&Apache::lonnet::symbread() eq '') {  
  if ($ENV{'request.state'} eq "construct") {  
     $request->print("In construction space, submissions ".  
     "ignored<br />");  
  } else {  
     $request->print("Browsing or <a href=\"/adm/ambiguous\">".  
     "ambiguous</a> reference, submissions ".  
     "ignored<br />");  
  }  
     }  
     #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }  
  }  
  if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }  
   
  my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/'.  
      'includes/default_homework.lcpm');  
  if ($default == -1) {  
     &Apache::lonxml::error("<b>Unable to find <i>default_homework.".  
    "lcpm</i></b>");  
     $default='';  
  }  
  $result = &Apache::lonxml::xmlparse($target, $problem,  
     $default.&setup_vars($target),  
     %mystyle);  
  #$request->print("Result follows:");  
  if ($target eq 'modified') {  
     &handle_save_or_undo($request,\$problem,\$result);  
  } else {   } else {
     #my $td=&tv_interval($t0);    $request->print("Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored<br />");
     #if ( $Apache::lonxml::debug) {  
     #$result =~ s:</body>::;  
     #$result.="<br />Spent $td seconds processing target $target\n</body>";  
     #}  
     $request->print($result);  
  }   }
  #$request->print(":Result ends");        }
  if ($target eq 'grade') { &showhash(%Apache::lonhomework::results); }        #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
       }
  #store new values      if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
  my ($temp) = keys %Apache::lonhomework::results;  
  if ( $temp ne '' ) {      my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
     &Apache::lonxml::debug("Store return message:".      if ($default == -1) {
       &Apache::lonnet::cstore(\%Apache::lonhomework::results));        &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
  }        $default='';
  #my $td=&tv_interval($t0);      }
       $result = &Apache::lonxml::xmlparse($target, $problem,
    $default.&setup_vars($target),%mystyle);
   
       #$request->print("Result follows:");
       if ($target eq 'modified') {
         &handle_save_or_undo($request,\$problem,\$result);
       } else {
         #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->print(":Result ends");
       #my $td=&tv_interval($t0);
     }
 }  }
   
 # =========================================================== Get template list  
 # 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 $result;
     &Apache::lonxml::debug("Looking for :$extension:");    &Apache::lonxml::debug("Looking for :$extension:");
     foreach my $file    foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
  (</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 {        $result.="<option>$name</option>";
     $result.="<option>$name</option>";  
  }  
     }      }
     return $result;    }
     return $result;
 }  }
   
 # ================================================================= New problem  
 sub newproblem {  sub newproblem {
     my ($request) = @_;    my ($request) = @_;
     my $extension = $request->uri;  
     $extension =~ s:^.*\.([\w]+)$:$1:;    my $extension=$request->uri;
     &Apache::lonxml::debug("Looking for :$extension:");    $extension=~s:^.*\.([\w]+)$:$1:;
     if ($ENV{'form.template'}) {    &Apache::lonxml::debug("Looking for :$extension:");
  use File::Copy;    if ($ENV{'form.template'}) {
  my $file = &get_template_list($ENV{'form.template'},$extension);      use File::Copy;
  my $dest = &Apache::lonnet::filelocation("",$request->uri);      my $file = &get_template_list($ENV{'form.template'},$extension);
  copy($file,$dest);      my $dest = &Apache::lonnet::filelocation("",$request->uri);
  &renderpage($request,$file);      copy($file,$dest);
     } else {      &renderpage($request,$file);
  my $templatelist = &get_template_list('',$extension);    } else {
  my $url = $request->uri;      my $templatelist=&get_template_list('',$extension);
  my $dest = &Apache::lonnet::filelocation("",$request->uri);      my $url=$request->uri;
  $request->print(<<ENDNEWPROBLEM);      my $dest = &Apache::lonnet::filelocation("",$request->uri);
       $request->print(<<ENDNEWPROBLEM);
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
 The request file $url doesn\'t exist. You can create a new $extension <br />  The request file $url doesn\'t exist. You can create a new $extension <br />
 <form action="$url" method="POST">  <form action="$url" method="POST">
Line 355  ENDNEWPROBLEM Line 340  ENDNEWPROBLEM
 }  }
   
 sub view_or_edit_menu {  sub view_or_edit_menu {
     my ($request) = @_;    my ($request) = @_;
     my $url = $request->uri;    my $url=$request->uri;
     $request->print(<<EDITMENU);    $request->print(<<EDITMENU);
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
 <form action="$url" method="POST">  <form action="$url" method="POST">
 Would you like to <input type="submit" name="problemmode" value="View"> or  Would you like to <input type="submit" name="problemmode" value="View"> or
Line 367  Would you like to <input type="submit" n Line 352  Would you like to <input type="submit" n
 EDITMENU  EDITMENU
 }  }
   
 # ===================================================================== Handler  
 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;}    if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
   
   if (&setupheader($request)) { return OK; }    if (&setupheader($request)) { return OK; }
   $ENV{'request.uri'} = $request->uri;    $ENV{'request.uri'}=$request->uri;
   
   #setup permissions    #setup permissions
     $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',    $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
      $ENV{'request.filename'});    $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
     $Apache::lonhomework::viewgrades = &Apache::lonnet::allowed('vgr',    &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
     $ENV{'request.course.id'});  
     &Apache::lonxml::debug("Permissions:".    my $file=&Apache::lonnet::filelocation("",$request->uri);
    $Apache::lonhomework::browse.":".  
    $Apache::lonhomework::viewgrades.":");    #check if we know where we are
     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
     my $file = &Apache::lonnet::filelocation("",$request->uri);      # if we are browsing we might not be able to know where we are
       if ($Apache::lonhomework::browse ne 'F') {
     #check if we know where we are        #should know where we are, so ask
     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {         $request->internal_redirect('/adm/ambiguous'); return;
  # if we are browsing we might not be able to know where we are  
  if ($Apache::lonhomework::browse ne 'F') {  
     #should know where we are, so ask  
     $request->internal_redirect('/adm/ambiguous'); return;  
  }  
     }      }
     }
   
     if ($ENV{'request.state'} eq "construct") {    if ($ENV{'request.state'} eq "construct") {
  if ( -e $file ) {      if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
     if (!(defined $ENV{'form.problemmode'})) {        my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
  #first visit to problem in construction space        &Apache::lonnet::tmpreset($symb,'',$domain,$name);
  &view_or_edit_menu($request);      }
  #&renderpage($request,$file);      if ( -e $file ) {
     } else {        if (!(defined $ENV{'form.problemmode'})) {
  &renderpage($request,$file);   #first visit to problem in construction space
    &view_or_edit_menu($request);
    #&renderpage($request,$file);
         } else {
    &renderpage($request,$file);
       }        }
  } else {  
     # requested file doesn't exist in contruction space  
     &newproblem($request);  
  }  
     } else {      } else {
  # just render the page normally outside of construction space        # requested file doesn't exist in contruction space
  &renderpage($request,$file);        &newproblem($request);
     }      }
     #my $td=&tv_interval($t0);    } else {
     #&Apache::lonxml::debug("Spent $td seconds processing");      # just render the page normally outside of construction space
     # &Apache::lonhomework::send_footer($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;
   
 }  }
   
 1;  1;
   
 __END__  __END__
Removed from v.1.51  
changed lines
  Added in v.1.63

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