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Diff for /loncom/homework/lonhomework.pm between versions 1.8 and 1.51

version 1.8, 2000/08/11 14:57:32 version 1.51, 2001/08/06 18:24:37
Line 1 Line 1
 # The LON-CAPA Homework handler  # The LON-CAPA homework handler
 # Guy Albertelli  # 
   # Handles homework.
   #
   # YEAR=2000
   # 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
   # 11/30 Gerd Kortemeyer
   # 12/4,12/8,12/12,12/15,12/19,12/21 Guy Albertelli
   # 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 8  use Apache::lonxml; Line 20  use Apache::lonxml;
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::inputtags;  use Apache::inputtags;
 use Apache::structuretags;  use Apache::structuretags;
   use Apache::response;
   use Apache::hint;
   use Apache::outputtags;
   use Apache::Constants qw(:common);
   #use Time::HiRes qw( gettimeofday tv_interval );
   
 sub handler {  # ======================================================================= BEGIN
   my $request=shift;  sub BEGIN {
     &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);  
 }  }
   
   # =============================================== Get target (returns an array)
 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');
    } else {
       return ('web');
    }
       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
    if ( $ENV{'form.submitted'} eq 'edit' ) {
       return ('modified','edit');
    } else {
       return ('edit');
    }
       } else {
    return ('web');
       }
    }
       }
       return ();
 }  }
   
   # ===================================== Set up variables (return scalar string)
 sub setup_vars {  sub setup_vars {
   my ($target) = @_;      my ($target) = @_;
   return ';$external::target='.$target.';';      return ';'
   #  return ';$external::target='.$target.';';
 }  }
   
   # ================================================================= Send header
 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.'">');
   }
   
   # ================================================================= Create menu
   sub createmenu {
       my ($which,$request) = @_;
       if ($which eq 'grade') {
    $request->print('<script language="JavaScript">'."\n".
           'hwkmenu=window.open("/res/adm/pages/homeworkmenu.html'.
         '","homeworkremote","height=350,width=150,menubar=no");'.
         '</script>');
       }
 }  }
   
   # ================================================================= Send footer
 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="";  
   if (! -e $filename ) {  
     &Apache::lonnet::subscribe($filename);  
     &Apache::lonnet::repcopy($filename);  
   }  
   {  
     my $fh=Apache::File->new($filename);  
   
     while (<$fh>) {  # =============================================== Check date (returns an array)
       $a .=$_;  sub check_date {
       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 = $temp; last; }
       }
       &Apache::lonxml::debug("have :$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);
   }
   
   # ================================================================== Shows hash
   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 '';
   }
   
   # =========================================================== Setup permissions
   sub setuppermissions {
       $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',
        $ENV{'request.filename'});
       $Apache::lonhomework::viewgrades = &Apache::lonnet::allowed('vgr',
       $ENV{'request.course.id'});
       return '';
   }
   
   # ================================================================ Setup header
   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 '';
   }
   
   # ========================================================= Handle save or undo
   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>");
    }
       }
   }
   
   # ================================================================= Render page
   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 $result = '';
    &Apache::inputtags::initialize_inputtags;
    &Apache::edit::initialize_edit;
    %Apache::lonhomework::results=();
    %Apache::lonhomework::history=&Apache::lonnet::restore();
    #ignore error conditions
    my ($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 {
       #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);
    }
    #$request->print(":Result ends");
    if ($target eq 'grade') { &showhash(%Apache::lonhomework::results); }
   
    #store new values
    my ($temp) = keys %Apache::lonhomework::results;
    if ( $temp ne '' ) {
       &Apache::lonxml::debug("Store return message:".
         &Apache::lonnet::cstore(\%Apache::lonhomework::results));
    }
    #my $td=&tv_interval($t0);
       }
   }
   
   # =========================================================== Get template list
   # 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;
   }
   
   # ================================================================= New problem
   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 $a  
     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
   }
   
   # ===================================================================== Handler
   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;
   
 __END__  __END__
Removed from v.1.8  
changed lines
  Added in v.1.51

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