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- opendate should be properly checked now

    1: # The LON-CAPA Homework handler
    2: # Guy Albertelli
    3: # 11/30 Gerd Kortemeyer
    4: 
    5: package Apache::lonhomework;
    6: use strict;
    7: use Apache::style;
    8: use Apache::lonxml;
    9: use Apache::lonnet;
   10: use Apache::inputtags;
   11: use Apache::structuretags;
   12: use Apache::response;
   13: 
   14: 
   15: sub get_target {
   16:   if ( $ENV{'request.state'} eq "published") {
   17:     if ( defined $ENV{'form.submit'}) {
   18:       return ('grade', 'web');
   19:     } else {
   20:       return ('web');
   21:     }
   22:   } elsif ($ENV{'request.state'} eq "construct") {
   23:     if ( defined $ENV{'form.preview'}) {
   24:       if ( defined $ENV{'form.submit'}) {
   25: 	return ('grade', 'web');
   26:       } else {
   27: 	return ('web');
   28:       }
   29:     } else {
   30:       return ('edit');
   31:     }
   32:   }
   33:   return ();
   34: }
   35: 
   36: sub setup_vars {
   37:   my ($target) = @_;
   38:   return ';'
   39: #  return ';$external::target='.$target.';';
   40: }
   41: 
   42: sub send_header {
   43:   my ($request)= @_;
   44:   $request->print(&Apache::lontexconvert::header());
   45:   $ENV{'request.uri'}=$request->uri;
   46: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
   47: }
   48: 
   49: sub send_footer {
   50:   my ($request)= @_;
   51: #  $request->print('</form>');
   52:   $request->print(&Apache::lontexconvert::footer());
   53: }
   54: 
   55: sub check_date {
   56:   my ($type,$id) = @_;
   57:   my $date ='';
   58:   my $passed = '';
   59:   &Apache::lonxml::debug("checking :$type: for part :$id:");
   60:   if ($type eq 'OPEN_DATE') {
   61:     $date = &Apache::lonnet::EXT("resource.$id.opendate");
   62:   } elsif ($type eq 'DUE_DATE') {
   63:     $date = &Apache::lonnet::EXT("resource.$id.duedate");
   64:   } elsif ($type eq 'START_DATE') {
   65:     $date = &Apache::lonnet::EXT("resource.$id.duedate");
   66:   } else {
   67:     &Apache::lonxml::error("Unknown date request $type");
   68:     $date = '';
   69:   }
   70:   &Apache::lonxml::debug("found :$date:");
   71:   if ($date eq '') {
   72:     $date = "an unknown date"; $passed = 0;
   73:   } else {
   74:     if (time < $date) { $passed = 0; } else { $passed = 1; }
   75:     $date = localtime $date;
   76:   }
   77:   &Apache::lonxml::debug("sending back :$date:$passed:");
   78:   return ($date,$passed);
   79: }
   80: 
   81: sub handler {
   82:   my $request=$_[0];
   83: 
   84:   if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; }
   85:   
   86:   my (@targets) = &get_target();
   87: 
   88:   if ($ENV{'browser.mathml'}) {
   89:     $request->content_type('text/xml');
   90:   } else {
   91:     $request->content_type('text/html');
   92:   }
   93:   $request->send_http_header;
   94:   return 'OK' if $request->header_only;
   95:   
   96:   &Apache::lonhomework::send_header($request);
   97:   
   98:   #check if allowed to see
   99:   
  100:   foreach my $target (@targets) {
  101:     my $file=&Apache::lonnet::filelocation("",$request->uri);
  102:     my $problem=&Apache::lonnet::getfile($file);
  103:     if ($problem == -1) {
  104:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
  105:       $problem='';
  106:     }
  107:     
  108:     my %mystyle;
  109:     my $result = '';
  110:     &Apache::inputtags::initialize_inputtags;
  111:     %Apache::lonhomework::results=();
  112:     %Apache::lonhomework::history=&Apache::lonnet::restore;
  113:     #ignore error conditions
  114:     my ($temp)=keys %Apache::lonhomework::history ;
  115:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
  116:     if ($target eq 'web' && &Apache::lonnet::symbread() eq '') {
  117:       $request->print("Vieiwing this problem as not a student, submissions will be ignored.");
  118:     }
  119:     if ($target eq 'grade') {
  120:       my $resultkey;
  121:       foreach $resultkey (sort keys %Apache::lonhomework::history) {
  122: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");
  123:       }
  124:       &Apache::lonxml::debug("\n<br>restored values^</br>\n");
  125:     }
  126:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
  127:     if ($default == -1) {
  128:       &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
  129:       $default='';
  130:     }
  131:     if ( $target eq 'grade') { 
  132:       $Apache::lonxml::textredirection = 0; 
  133:     } else {
  134:       $Apache::lonxml::textredirection = 1; 
  135:     }
  136:     $result = &Apache::lonxml::xmlparse($target, $problem,
  137: 			$default.&setup_vars($target),%mystyle);
  138: 
  139:     #$request->print("Result follows:");
  140:     $request->print($result);
  141:     #$request->print(":Result ends");
  142:     if ($target eq 'grade') {
  143:       my $resultkey;
  144:       foreach $resultkey (sort keys %Apache::lonhomework::results) {
  145: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
  146:       }
  147:       &Apache::lonxml::debug("\n<br>storing values^</br>\n");
  148:     }
  149:     
  150:     my ($temp) = keys %Apache::lonhomework::results;
  151:     if ( $temp ne '' ) {
  152:       &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));
  153:     }
  154:   }
  155:   &Apache::lonhomework::send_footer($request);
  156:   
  157:   return 'OK';
  158: 
  159: }
  160: 
  161: 1;
  162: __END__