Annotation of loncom/homework/lonhomework.pm, revision 1.30

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

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