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- check if we know where we are, if not /adm/ambigious will figure it out

    1: # The LON-CAPA Homework handler
    2: # Guy Albertelli
    3: # 11/30 Gerd Kortemeyer
    4: # 6/1 Gerd Kortemeyer
    5: 
    6: package Apache::lonhomework;
    7: use strict;
    8: use Apache::style;
    9: use Apache::lonxml;
   10: use Apache::lonnet;
   11: use Apache::inputtags;
   12: use Apache::structuretags;
   13: use Apache::response;
   14: use Apache::hint;
   15: use Apache::outputtags;
   16: use Apache::Constants qw(:common);
   17: 
   18: sub get_target {
   19:   if ( $ENV{'request.state'} eq "published") {
   20:     if ( defined $ENV{'form.submitted'}) {
   21:       return ('grade', 'web');
   22:     } else {
   23:       return ('web');
   24:     }
   25:   } elsif ($ENV{'request.state'} eq "construct") {
   26:     if ( defined $ENV{'form.preview'}) {
   27:       if ( defined $ENV{'form.submitted'}) {
   28: 	return ('grade', 'web');
   29:       } else {
   30: 	return ('web');
   31:       }
   32:     } else {
   33:       #return ('edit');
   34:       #edit is currently broken
   35:       return ('web');
   36:     }
   37:   }
   38:   return ();
   39: }
   40: 
   41: sub setup_vars {
   42:   my ($target) = @_;
   43:   return ';'
   44: #  return ';$external::target='.$target.';';
   45: }
   46: 
   47: sub send_header {
   48:   my ($request)= @_;
   49:   $request->print(&Apache::lontexconvert::header());
   50:   $ENV{'request.uri'}=$request->uri;
   51: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
   52: }
   53: 
   54: sub send_footer {
   55:   my ($request)= @_;
   56: #  $request->print('</form>');
   57:   $request->print(&Apache::lontexconvert::footer());
   58: }
   59: 
   60: #@Apache::lonhomework::date_status=();
   61: #@Apache::lonhomework::date_msg=();
   62: sub check_date {
   63:   my ($id) = @_;
   64:   my $date ='';
   65:   my $status = '';
   66:   my $datemsg = '';
   67:   my $lastdate = '';
   68:   my $temp;
   69:   my $type;
   70:   my $passed;
   71:   &Apache::lonxml::debug("checking for part :$id:");
   72:   foreach $temp ("opendate","duedate","answerdate") {
   73:     $lastdate = $date;
   74:     $date = &Apache::lonnet::EXT("resource.$id.$temp");
   75:     &Apache::lonxml::debug("found :$date: for :$temp:");
   76:     if ($date eq '') {
   77:       $date = "an unknown date"; $passed = 0;
   78:     } elsif ($date eq 'con_lost') {
   79:       $date = "an indeterminate date"; $passed = 0;
   80:     } else {
   81:       if (time < $date) { $passed = 0; } else { $passed = 1; }
   82:       $date = localtime $date;
   83:     }
   84:     if (!$passed) { $type=$temp; last; }
   85:   }
   86:   &Apache::lonxml::debug("have :$type:$passed:");
   87:   if ($passed) {
   88:     $status='SHOW_ANSWER';
   89:     $datemsg=$date;
   90:   } elsif ($type eq 'opendate') {
   91:     $status='CLOSED';
   92:     $datemsg = "will open on $date";
   93:   } elsif ($type eq 'duedate') {
   94:     $status='CAN_ANSWER';
   95:     $datemsg = "is due at $date";
   96:   } elsif ($type eq 'answerdate') {
   97:     $status='CLOSED';
   98:     $datemsg = "was due on $lastdate, and answers will be available on $date";
   99:   }
  100:   if ($status eq 'CAN_ANSWER') {
  101:     #check #tries
  102:     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
  103:     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
  104:     if ( $tries eq '' ) { $tries = '0'; }
  105:     if ( $maxtries eq '' ) { $maxtries = '2'; } 
  106:     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 
  107:   }
  108:   &Apache::lonxml::debug("sending back :$status:$datemsg:");
  109:   if ($ENV{'request.state'} eq "construct") {
  110:     &Apache::lonxml::debug("in construction ignoring dates");
  111:     $status='CAN_ANSWER';
  112:     $datemsg='is in under construction';
  113:   }
  114:   return ($status,$datemsg);
  115: }
  116: 
  117: sub handler {
  118:   my $request=$_[0];
  119: 
  120:   if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;} else {$Apache::lonxml::debug=0;}
  121:   
  122:   my (@targets) = &get_target();
  123: 
  124:   if ($ENV{'browser.mathml'}) {
  125:     $request->content_type('text/xml');
  126:   } else {
  127:     $request->content_type('text/html');
  128:   }
  129:   $request->send_http_header;
  130:   return OK if $request->header_only;
  131: 
  132:   #check if we know where we are
  133:   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
  134:     $request->internal_redirect('/adm/ambiguous'); return; 
  135:   }
  136: 
  137:   &Apache::lonhomework::send_header($request);
  138:   
  139:   #check if allowed to see
  140:   
  141:   foreach my $target (@targets) {
  142:     my $file=&Apache::lonnet::filelocation("",$request->uri);
  143:     my $problem=&Apache::lonnet::getfile($file);
  144:     if ($problem == -1) {
  145:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
  146:       $problem='';
  147:     }
  148:     
  149:     my %mystyle;
  150:     my $result = '';
  151:     &Apache::inputtags::initialize_inputtags;
  152:     %Apache::lonhomework::results=();
  153:     %Apache::lonhomework::history=&Apache::lonnet::restore;
  154:     #ignore error conditions
  155:     my ($temp)=keys %Apache::lonhomework::history ;
  156:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
  157:     if ($target eq 'web' && &Apache::lonnet::symbread() eq '') {
  158:       $request->print("Vieiwing this problem as not a student, submissions will be ignored.");
  159:     }
  160:     if ($target eq 'grade') {
  161:       my $resultkey;
  162:       foreach $resultkey (sort keys %Apache::lonhomework::history) {
  163: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");
  164:       }
  165:       &Apache::lonxml::debug("\n<br>restored values^</br>\n");
  166:     }
  167:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
  168:     if ($default == -1) {
  169:       &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
  170:       $default='';
  171:     }
  172:     $result = &Apache::lonxml::xmlparse($target, $problem,
  173: 			$default.&setup_vars($target),%mystyle);
  174: 
  175:     #$request->print("Result follows:");
  176:     $request->print($result);
  177:     #$request->print(":Result ends");
  178:     if ($target eq 'grade') {
  179: 
  180:       my $resultkey;
  181:       foreach $resultkey (sort keys %Apache::lonhomework::results) {
  182: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
  183:       }
  184:       &Apache::lonxml::debug("\n<br>storing values^</br>\n");
  185:     }
  186:     
  187:     my ($temp) = keys %Apache::lonhomework::results;
  188:     if ( $temp ne '' ) {
  189:       &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));
  190:     }
  191:   }
  192:   &Apache::lonhomework::send_footer($request);
  193:   
  194:   return OK;
  195: 
  196: }
  197: 
  198: 1;
  199: __END__