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Annotation of loncom/homework/lonhomework.pm, revision 1.17

1.1       albertel    1: # The LON-CAPA Homework handler
                      2: # Guy Albertelli
1.17    ! www         3: # 11/30 Gerd Kortemeyer
1.1       albertel    4: 
                      5: package Apache::lonhomework;
                      6: use strict;
                      7: use Apache::style;
                      8: use Apache::lonxml;
1.2       albertel    9: use Apache::lonnet;
                     10: use Apache::inputtags;
                     11: use Apache::structuretags;
1.9       albertel   12: use Apache::response;
1.1       albertel   13: 
1.16      albertel   14: 
1.17    ! www        15: sub subhandler {
        !            16:   my ($target,$problem)=@_;
1.2       albertel   17:   my %mystyle;
1.5       albertel   18:   my $result = '';
1.2       albertel   19:   &Apache::inputtags::initialize_inputtags;
1.16      albertel   20:   %Apache::lonhomework::results=();
                     21:   %Apache::lonhomework::history=&Apache::lonnet::restore;
                     22:   #ignore error conditions
                     23:   my ($temp)=keys %Apache::lonhomework::history ;
                     24:   if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
                     25: 
                     26:   my $resultkey;
                     27:   foreach $resultkey (sort keys %Apache::lonhomework::history) {
                     28:     &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");
                     29:   }
                     30:   &Apache::lonxml::debug("\n<br>restored values^</br>\n");
1.13      albertel   31:   my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
                     32:   if ($default == -1) {
1.17    ! www        33:     &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
1.13      albertel   34:     $default='';
                     35:   }
                     36: 
1.17    ! www        37:   return Apache::lonxml::xmlparse($target, $problem,
1.13      albertel   38: 				     $default.&setup_vars($target),%mystyle);
1.3       albertel   39: }
                     40: 
1.5       albertel   41: sub get_target {
1.15      albertel   42:   if ( $ENV{'request.state'} eq "published") {
                     43:     return 'web';
                     44:   } elsif ($ENV{'request.state'} eq "construct") {
1.16      albertel   45:     if ( defined $ENV{'form.preview'}) {
1.15      albertel   46:       return 'web';
                     47:     } else {
                     48:       return 'edit';
                     49:     }
                     50:   }
1.5       albertel   51: }
                     52: 
1.3       albertel   53: sub setup_vars {
1.5       albertel   54:   my ($target) = @_;
1.11      albertel   55:   return ';'
                     56: #  return ';$external::target='.$target.';';
1.2       albertel   57: }
                     58: 
                     59: sub send_header {
                     60:   my ($request)= @_;
1.14      albertel   61:   $request->print(&Apache::lontexconvert::header());
1.16      albertel   62:   $ENV{'request.uri'}=$request->uri;
                     63: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel   64: }
                     65: 
                     66: sub send_footer {
                     67:   my ($request)= @_;
1.16      albertel   68: #  $request->print('</form>');
1.14      albertel   69:   $request->print(&Apache::lontexconvert::footer());
1.2       albertel   70: }
                     71: 
1.15      albertel   72: sub getfilenothere {
1.2       albertel   73:   my ($filename) = @_;
                     74:   my $a="";
1.8       albertel   75:   if (! -e $filename ) {
                     76:     &Apache::lonnet::subscribe($filename);
                     77:     &Apache::lonnet::repcopy($filename);
                     78:   }
1.1       albertel   79:   {
1.8       albertel   80:     my $fh=Apache::File->new($filename);
1.2       albertel   81: 
                     82:     while (<$fh>) {
                     83:       $a .=$_;
                     84:     }
1.1       albertel   85:   }
1.2       albertel   86:   return $a
1.17    ! www        87: }
        !            88: 
        !            89: sub handler {
        !            90:   my $request=shift;
        !            91: 
        !            92:   $Apache::lonxml::debug=1;
        !            93:   if ($ENV{'browser.mathml'}) {
        !            94:     $request->content_type('text/xml');
        !            95:   } else {
        !            96:     $request->content_type('text/html');
        !            97:   }
        !            98:   $request->send_http_header;
        !            99:   return 'OK' if $request->header_only;
        !           100: 
        !           101:   &Apache::lonhomework::send_header($request);
        !           102:   my $file=&Apache::lonnet::filelocation("",$request->uri);
        !           103:   my $problem=&Apache::lonnet::getfile($file);
        !           104:   if ($problem == -1) {
        !           105:     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
        !           106:     $problem='';
        !           107:   }
        !           108: 
        !           109:   my $result=&subhandler(&get_target(),$problem);
        !           110: 
        !           111:   #$request->print("Result follows:");
        !           112:   $request->print($result);
        !           113:   #$request->print(":Result ends");
        !           114: 
        !           115:   my $temp;
        !           116:   my $resultkey;
        !           117:   foreach $resultkey (sort keys %Apache::lonhomework::results) {
        !           118:     &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
        !           119:   }
        !           120:   &Apache::lonxml::debug("\n<br>storing values^</br>\n");
        !           121: 
        !           122:   &Apache::lonhomework::send_footer($request);
        !           123:   ($temp) = keys %Apache::lonhomework::results;
        !           124:   if ( $temp ne '' ) {
        !           125:     &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));
        !           126:   }
        !           127:   return 'OK';
        !           128: 
1.1       albertel  129: }
                    130: 
                    131: 1;
                    132: __END__