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Diff for /loncom/homework/lonhomework.pm between versions 1.6 and 1.60

version 1.6, 2000/08/11 14:25:24 version 1.60, 2001/09/14 20:14:12
Line 1 Line 1
 # The LON-CAPA Homework handler  # The LON-CAPA Homework handler
 # Guy Albertelli  # Guy Albertelli
   # 11/30 Gerd Kortemeyer
   # 6/1,8/17,8/18 Gerd Kortemeyer
   
 package Apache::lonhomework;  package Apache::lonhomework;
 use strict;  use strict;
Line 8  use Apache::lonxml; Line 10  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::hint;
   use Apache::outputtags;
   use Apache::Constants qw(:common);
   #use Time::HiRes qw( gettimeofday tv_interval );
   
 sub handler {  sub BEGIN {
   my $request=shift;    &Apache::lonxml::register_insert();
   
   my $target=&get_target();  
   $request->content_type('text/html');  
   $request->send_http_header;  
   &Apache::lonhomework::send_header($request);  
   my $file = "/home/httpd/html".$request->uri;  
   my %mystyle;  
   my $result = '';  
   &Apache::inputtags::initialize_inputtags;  
   $result = Apache::lonxml::xmlparse($target, &getfile($file),  
  &getfile('/home/httpd/html/res/103/albertel/default_homework').&setup_vars($target),%mystyle);  
   #$request->print("Result follows:");  
   $request->print($result);  
   #$request->print(":Result ends");  
   &Apache::lonhomework::send_footer($request);  
 }  }
   
 sub get_target {  sub get_target {
   return "web";    if ( $ENV{'request.state'} eq "published") {
       if ( defined $ENV{'form.submitted'}) {
         return ('grade', 'web');
       } else {
         return ('web');
       }
     } elsif ($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'}) {
     return ('grade', 'web','answer');
    } else {
     return ('web','answer');
    }
         } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
    if ( $ENV{'form.submitted'} eq 'edit' ) {
     return ('modified','edit');
    } else {
     return ('edit');
    }
         } else {
    return ('web');
         }
       }
     }
     return ();
 }  }
   
 sub setup_vars {  sub setup_vars {
   my ($target) = @_;    my ($target) = @_;
   return ';$external::target='.$target.';';    return ';'
   #  return ';$external::target='.$target.';';
 }  }
   
 sub send_header {  sub send_header {
   my ($request)= @_;    my ($request)= @_;
   $request->print('<html>');    $request->print(&Apache::lontexconvert::header());
   $request->print('<form method="POST" action="'.$request->uri.'">');  #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
   }
   
   sub createmenu {
     my ($which,$request)=@_;
     if ($which eq 'grade') {
       $request->print('<script language="JavaScript"> 
             hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
                    "height=350,width=150,menubar=no");
             </script>');
     }
 }  }
   
 sub send_footer {  sub send_footer {
   my ($request)= @_;    my ($request)= @_;
   $request->print('</form>');  #  $request->print('</form>');
   $request->print('</html>');    $request->print(&Apache::lontexconvert::footer());
 }  }
   
 sub getfile {  $Apache::lonxml::browse='';
   my ($filename) = @_;  
   my $a="";  
   &Apache::lonnet::repcopy($filename);  
   {  
     my $fh=Apache::File->new($filename);  
   
     while (<$fh>) {  sub check_access {
       $a .=$_;    my ($id) = @_;
     my $date ='';
     my $status = '';
     my $datemsg = '';
     my $lastdate = '';
     my $temp;
     my $type;
     my $passed;
     &Apache::lonxml::debug("checking for part :$id:");
     foreach $temp ("opendate","duedate","answerdate") {
       $lastdate = $date;
       $date = &Apache::lonnet::EXT("resource.$id.$temp");
       &Apache::lonxml::debug("found :$date: for :$temp:");
       if ($date eq '') {
         $date = "an unknown date"; $passed = 0;
       } elsif ($date eq 'con_lost') {
         $date = "an indeterminate date"; $passed = 0;
       } else {
         if (time < $date) { $passed = 0; } else { $passed = 1; }
         $date = localtime $date;
     }      }
       if (!$passed) { $type=$temp; last; }
   }    }
   return $a    &Apache::lonxml::debug("have :$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);
   }
   
   sub showhash {
     my (%hash) = @_;
     my $resultkey;
     foreach $resultkey (sort keys %hash) {
       &Apache::lonxml::debug("$resultkey ---- $hash{$resultkey}");
     }
     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
     return '';
   }
   
   sub setuppermissions {
     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
     $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
     return ''
   }
   
   sub setupheader {
     my $request=$_[0];
     if ($ENV{'browser.mathml'}) {
       $request->content_type('text/xml');
     } else {
       $request->content_type('text/html');
     }
     $request->send_http_header;
     return OK if $request->header_only;
     return ''
   }
   
   sub handle_save_or_undo {
     my ($request,$problem,$result) = @_;
     my $fileout = &Apache::lonnet::filelocation("",$request->uri);
     my $filesave=$fileout.".bak";
   
     if ($ENV{'form.Undo'} eq 'undo') {
       if (copy($filesave,$fileout)) {
         $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 {
       my $fs=Apache::File->new(">$filesave");
       if (defined($fs)) {
         print $fs $$problem;
         $request->print("<b>Making Backup to $filesave</b><br />");
       } else {
         $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filesave</b></font>");
       }
       my $fh=Apache::File->new(">$fileout");
       if (defined($fh)) {
         print $fh $$result;
         $request->print("<b>Saving Modifications to $fileout</b><br />");
       } else {
         $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $fileout</b></font>");
       }
     }
   }
   
   sub renderpage {
     my ($request,$file) = @_;
   
     my (@targets) = &get_target();
     foreach my $target (@targets) {
       #my $t0 = [&gettimeofday()];
       my $problem=&Apache::lonnet::getfile($file);
       if ($problem == -1) {
         &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
         $problem='';
       }
   
       my %mystyle;
       my $result = '';
       &Apache::inputtags::initialize_inputtags;
       &Apache::edit::initialize_edit;
       if ($target eq 'web') {
         if (&Apache::lonnet::symbread() eq '') {
    if ($ENV{'request.state'} eq "construct") {
    } 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 {
         #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);
     }
   }
   
   # 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
   sub get_template_list {
     my ($namewanted,$extension) = @_;
     my $result;
     &Apache::lonxml::debug("Looking for :$extension:");
     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
       my $name=&Apache::lonnet::metadata($file,'title');
       if ($namewanted && ($name eq $namewanted)) {
         $result=$file;
         last;
       } else {
         $result.="<option>$name</option>";
       }
     }
     return $result;
   }
   
   sub newproblem {
     my ($request) = @_;
   
     my $extension=$request->uri;
     $extension=~s:^.*\.([\w]+)$:$1:;
     &Apache::lonxml::debug("Looking for :$extension:");
     if ($ENV{'form.template'}) {
       use File::Copy;
       my $file = &get_template_list($ENV{'form.template'},$extension);
       my $dest = &Apache::lonnet::filelocation("",$request->uri);
       copy($file,$dest);
       &renderpage($request,$file);
     } else {
       my $templatelist=&get_template_list('',$extension);
       my $url=$request->uri;
       my $dest = &Apache::lonnet::filelocation("",$request->uri);
       $request->print(<<ENDNEWPROBLEM);
   <body bgcolor="#FFFFFF">
   The request file $url doesn\'t exist. You can create a new $extension <br />
   <form action="$url" method="POST">
   <input type="submit" value="New $extension"><br />
   <select name="template">
   $templatelist
   </select>
   </form>
   </body>
   ENDNEWPROBLEM
     }
   
     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 {
     #my $t0 = [&gettimeofday()];
     my $request=$_[0];
   
     if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
   
     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:");
   
     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') {
         #should know where we are, so ask
         $request->internal_redirect('/adm/ambiguous'); return;
       }
     }
   
     if ($ENV{'request.state'} eq "construct") {
       if ( -e $file ) {
         if (!(defined $ENV{'form.problemmode'})) {
    #first visit to problem in construction space
    &view_or_edit_menu($request);
    #&renderpage($request,$file);
         } else {
    &renderpage($request,$file);
         }
       } else {
         # requested file doesn't exist in contruction space
         &newproblem($request);
       }
     } else {
       # just render the page normally outside of construction space
       &renderpage($request,$file);
     }
     #my $td=&tv_interval($t0);
     #&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;
Removed from v.1.6  
changed lines
  Added in v.1.60

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