Annotation of loncom/homework/lonhomework.pm, revision 1.32

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

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