Annotation of loncom/homework/lonhomework.pm, revision 1.122

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.122   ! albertel    4: # $Id: lonhomework.pm,v 1.121 2003/05/08 15:33:15 albertel Exp $
1.63      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.52      albertel   28: # Guy Albertelli
1.17      www        29: # 11/30 Gerd Kortemeyer
1.56      www        30: # 6/1,8/17,8/18 Gerd Kortemeyer
1.82      bowersj2   31: # 7/18 Jeremy Bowers
1.1       albertel   32: 
                     33: package Apache::lonhomework;
                     34: use strict;
1.73      albertel   35: use Apache::style();
                     36: use Apache::lonxml();
                     37: use Apache::lonnet();
                     38: use Apache::lonplot();
                     39: use Apache::inputtags();
                     40: use Apache::structuretags();
                     41: use Apache::randomlabel();
                     42: use Apache::response();
                     43: use Apache::hint();
                     44: use Apache::outputtags();
1.83      albertel   45: use Apache::caparesponse();
                     46: use Apache::radiobuttonresponse();
                     47: use Apache::optionresponse();
                     48: use Apache::imageresponse();
                     49: use Apache::essayresponse();
                     50: use Apache::externalresponse();
1.106     albertel   51: use Apache::rankresponse();
1.107     albertel   52: use Apache::matchresponse();
1.122   ! albertel   53: #use Apache::chemresponse();
1.26      www        54: use Apache::Constants qw(:common);
1.73      albertel   55: use HTML::Entities();
1.83      albertel   56: use Apache::loncommon();
1.47      albertel   57: #use Time::HiRes qw( gettimeofday tv_interval );
1.43      albertel   58: 
1.69      harris41   59: BEGIN {
1.43      albertel   60:   &Apache::lonxml::register_insert();
                     61: }
                     62: 
1.5       albertel   63: sub get_target {
1.52      albertel   64:   if ( $ENV{'request.state'} eq "published") {
1.90      sakharuk   65:     if ( defined($ENV{'form.grade_target'}  ) 
                     66: 	 && ($ENV{'form.grade_target'} eq 'tex')) {
                     67:       return ($ENV{'form.grade_target'});
                     68:     } elsif ( defined($ENV{'form.grade_target'}  ) 
1.119     albertel   69: 	 && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.66      albertel   70:       return ($ENV{'form.grade_target'});
                     71:     }
1.90      sakharuk   72:  
1.118     albertel   73:     if ( defined($ENV{'form.submitted'}) &&
                     74: 	 ( !defined($ENV{'form.resetdata'}))) {
1.52      albertel   75:       return ('grade', 'web');
                     76:     } else {
                     77:       return ('web');
                     78:     }
                     79:   } elsif ($ENV{'request.state'} eq "construct") {
1.74      albertel   80:     if ( defined($ENV{'form.grade_target'}) ) {
                     81:       return ($ENV{'form.grade_target'});
                     82:     }
1.62      albertel   83:     if ( defined($ENV{'form.preview'})) {
                     84:       if ( defined($ENV{'form.submitted'})) {
1.52      albertel   85: 	return ('grade', 'web');
                     86:       } else {
                     87: 	return ('web');
                     88:       }
                     89:     } else {
1.88      albertel   90:       if ( $ENV{'form.problemmode'} eq 'View' ||
                     91: 	   $ENV{'form.problemmode'} eq 'Discard Edits and View') {
1.62      albertel   92: 	if ( defined($ENV{'form.submitted'}) &&
                     93: 	     (!defined($ENV{'form.resetdata'})) ) {
1.60      albertel   94: 	  return ('grade', 'web','answer');
1.42      albertel   95: 	} else {
1.60      albertel   96: 	  return ('web','answer');
1.42      albertel   97: 	}
1.52      albertel   98:       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
                     99: 	if ( $ENV{'form.submitted'} eq 'edit' ) {
1.80      albertel  100: 	  if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
1.81      albertel  101: 	    return ('modified','web','answer');
1.80      albertel  102: 	  } else {
                    103: 	    return ('modified','edit');
                    104: 	  }
1.42      albertel  105: 	} else {
1.52      albertel  106: 	  return ('edit');
1.42      albertel  107: 	}
1.52      albertel  108:       } else {
                    109: 	return ('web');
                    110:       }
1.15      albertel  111:     }
1.52      albertel  112:   }
                    113:   return ();
1.5       albertel  114: }
                    115: 
1.3       albertel  116: sub setup_vars {
1.52      albertel  117:   my ($target) = @_;
                    118:   return ';'
1.11      albertel  119: #  return ';$external::target='.$target.';';
1.2       albertel  120: }
                    121: 
                    122: sub send_header {
1.52      albertel  123:   my ($request)= @_;
                    124:   $request->print(&Apache::lontexconvert::header());
1.16      albertel  125: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  126: }
                    127: 
1.36      albertel  128: sub createmenu {
1.52      albertel  129:   my ($which,$request)=@_;
                    130:   if ($which eq 'grade') {
                    131:     $request->print('<script language="JavaScript"> 
1.91      albertel  132:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  133:                  "height=350,width=150,menubar=no");
                    134:           </script>');
                    135:   }
1.36      albertel  136: }
                    137: 
1.2       albertel  138: sub send_footer {
1.52      albertel  139:   my ($request)= @_;
1.16      albertel  140: #  $request->print('</form>');
1.52      albertel  141:   $request->print(&Apache::lontexconvert::footer());
1.2       albertel  142: }
                    143: 
1.52      albertel  144: $Apache::lonxml::browse='';
1.53      www       145: 
1.92      bowersj2  146: # JB, 9/24/2002: Any changes in this function may require a change
                    147: # in lonnavmaps::resource::getDateStatus.
1.53      www       148: sub check_access {
1.52      albertel  149:   my ($id) = @_;
                    150:   my $date ='';
1.103     albertel  151:   my $status;
1.52      albertel  152:   my $datemsg = '';
                    153:   my $lastdate = '';
                    154:   my $temp;
                    155:   my $type;
                    156:   my $passed;
1.106     albertel  157: 
                    158:   if ($ENV{'request.state'} eq "construct") {
                    159:     &Apache::lonxml::debug("in construction ignoring dates");
                    160:     $status='CAN_ANSWER';
                    161:     $datemsg='is in under construction';
                    162:     return ($status,$datemsg);
                    163:   }
                    164: 
1.52      albertel  165:   &Apache::lonxml::debug("checking for part :$id:");
1.73      albertel  166:   &Apache::lonxml::debug("time:".time);
1.52      albertel  167:   foreach $temp ("opendate","duedate","answerdate") {
                    168:     $lastdate = $date;
                    169:     $date = &Apache::lonnet::EXT("resource.$id.$temp");
1.87      www       170:     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
1.103     albertel  171:     if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    172: 	$date     =~ /^(con_lost|no_such_host)/) {
                    173: 	$status='UNAVAILABLE';
                    174: 	$date="may open later.";
                    175: 	return($status,$date);
                    176:     }
1.87      www       177:     if ($thistype eq 'date_interval') {
                    178: 	if ($temp eq 'opendate') {
                    179:            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    180:         }
                    181:         if ($temp eq 'answerdate') {
                    182:            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    183:         }
                    184:     }
1.52      albertel  185:     &Apache::lonxml::debug("found :$date: for :$temp:");
                    186:     if ($date eq '') {
                    187:       $date = "an unknown date"; $passed = 0;
                    188:     } elsif ($date eq 'con_lost') {
                    189:       $date = "an indeterminate date"; $passed = 0;
                    190:     } else {
                    191:       if (time < $date) { $passed = 0; } else { $passed = 1; }
                    192:       $date = localtime $date;
1.51      harris41  193:     }
1.52      albertel  194:     if (!$passed) { $type=$temp; last; }
                    195:   }
                    196:   &Apache::lonxml::debug("have :$type:$passed:");
                    197:   if ($passed) {
                    198:     $status='SHOW_ANSWER';
                    199:     $datemsg=$date;
                    200:   } elsif ($type eq 'opendate') {
                    201:     $status='CLOSED';
                    202:     $datemsg = "will open on $date";
                    203:   } elsif ($type eq 'duedate') {
                    204:     $status='CAN_ANSWER';
                    205:     $datemsg = "is due at $date";
                    206:   } elsif ($type eq 'answerdate') {
                    207:     $status='CLOSED';
                    208:     $datemsg = "was due on $lastdate, and answers will be available on $date";
                    209:   }
                    210:   if ($status eq 'CAN_ANSWER') {
1.121     albertel  211:     #check #tries, and if correct.
1.52      albertel  212:     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    213:     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    214:     if ( $tries eq '' ) { $tries = '0'; }
                    215:     if ( $maxtries eq '' ) { $maxtries = '2'; } 
                    216:     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 
1.121     albertel  217:     if($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/) {
                    218: 	$status = 'CANNOT_ANSWER';
                    219:     }
1.52      albertel  220:   }
1.54      www       221: 
1.56      www       222:   if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    223:       (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
1.54      www       224:       return ('UNCHECKEDOUT','needs to be checked out');
                    225:   }
                    226: 
                    227: 
1.52      albertel  228:   &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    229:   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
1.91      albertel  230:     &Apache::lonxml::debug("should be allowed to browse a resource when closed");
1.52      albertel  231:     $status='CAN_ANSWER';
                    232:     $datemsg='is closed but you are allowed to view it';
                    233:   }
1.106     albertel  234: 
1.52      albertel  235:   return ($status,$datemsg);
1.20      albertel  236: }
                    237: 
1.41      albertel  238: sub showhash {
1.52      albertel  239:   my (%hash) = @_;
1.99      albertel  240:   &showhashsubset(\%hash,'.');
1.79      albertel  241:   return '';
                    242: }
                    243: 
1.106     albertel  244: sub showarray {
                    245:     my ($array)=@_;
                    246:     my $string="(";
                    247:     foreach my $elm (@{ $array }) {
                    248: 	if (ref($elm)) {
                    249: 	    if ($elm =~ /ARRAY/ ) {
                    250: 		$string.=&showarray($elm);
                    251: 	    }
                    252: 	} else {
                    253: 	    $string.="$elm,"
                    254: 	}
                    255:     }
                    256:     chop($string);
                    257:     $string.=")";
                    258:     return $string;
                    259: }
                    260: 
1.79      albertel  261: sub showhashsubset {
                    262:   my ($hash,$keyre) = @_;
1.52      albertel  263:   my $resultkey;
1.79      albertel  264:   foreach $resultkey (sort keys %$hash) {
                    265:     if ($resultkey =~ /$keyre/) {
                    266:       if (ref($$hash{$resultkey})) {
                    267: 	if ($$hash{$resultkey} =~ /ARRAY/ ) {
1.106     albertel  268: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    269: 				   &showarray($$hash{$resultkey}));
                    270: 	} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    271: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    272: 	    &showhashsubset($$hash{$resultkey},'.');
1.79      albertel  273: 	} else {
1.106     albertel  274: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  275: 	}
                    276:       } else {
1.79      albertel  277: 	&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  278:       }
                    279:     }
1.52      albertel  280:   }
                    281:   &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    282:   return '';
1.41      albertel  283: }
                    284: 
                    285: sub setuppermissions {
1.52      albertel  286:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    287:   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    288:   return ''
1.41      albertel  289: }
                    290: 
                    291: sub setupheader {
1.120     albertel  292:     my $request=$_[0];
                    293:     if ($ENV{'browser.mathml'}) {
                    294: 	$request->content_type('text/xml');
                    295:     } else {
                    296: 	$request->content_type('text/html');
                    297:     }
                    298:     $request->content_encoding('UTF-8');
                    299:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    300: 	&Apache::loncommon::no_cache($request);
                    301:     }
                    302:     $request->send_http_header;
                    303:     return OK if $request->header_only;
                    304:     return ''
1.41      albertel  305: }
1.35      albertel  306: 
1.47      albertel  307: sub handle_save_or_undo {
1.52      albertel  308:   my ($request,$problem,$result) = @_;
1.70      albertel  309:   my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    310:   my $filebak =$file.".bak";
                    311:   my $filetmp =$file.".tmp";
1.64      albertel  312:   my $error=0;
1.52      albertel  313: 
                    314:   if ($ENV{'form.Undo'} eq 'undo') {
1.70      albertel  315:     my $error=0;
                    316:     if (!copy($file,$filetmp)) { $error=1; }
                    317:     if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    318:     if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    319:     if (!$error) {
                    320:       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52      albertel  321:     } else {
1.70      albertel  322:       $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64      albertel  323:       $error=1;
1.52      albertel  324:     }
                    325:   } else {
1.70      albertel  326:     my $fs=Apache::File->new(">$filebak");
1.52      albertel  327:     if (defined($fs)) {
                    328:       print $fs $$problem;
1.70      albertel  329:       $request->print("<b>Making Backup to $filebak</b><br />");
1.52      albertel  330:     } else {
1.70      albertel  331:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64      albertel  332:       $error=2;
1.52      albertel  333:     }
1.70      albertel  334:     my $fh=Apache::File->new(">$file");
1.52      albertel  335:     if (defined($fh)) {
                    336:       print $fh $$result;
1.70      albertel  337:       $request->print("<b>Saving Modifications to $file</b><br />");
1.47      albertel  338:     } else {
1.70      albertel  339:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64      albertel  340:       $error|=4;
1.47      albertel  341:     }
1.52      albertel  342:   }
1.64      albertel  343:   return $error;
                    344: }
                    345: 
1.101     albertel  346: sub analyze_header {
                    347:     my ($request) = @_;
1.109     albertel  348:     my $result.='<html>
                    349:             <head><title>Analyzing a problem</title></head>
                    350:             <body bgcolor="#FFFFFF">
1.101     albertel  351:             <form name="lonhomework" method="POST" action="'.
                    352: 	      $ENV{'request.uri'}.'">
                    353:             <input type="submit" name="problemmode" value="EditXML" />
                    354:             <input type="submit" name="problemmode" value="Edit" />
                    355:             <hr />
                    356:             <input type="submit" name="submit" value="View" />
                    357:             <hr />
                    358:             List of possible answers:
                    359:             </form>';
                    360:     $request->print($result);
                    361:     $request->rflush();
                    362: }
                    363: 
1.109     albertel  364: sub analyze_footer {
                    365:     my ($request) = @_;
                    366:     my $result='</body></html>';
                    367:     $request->print($result);
                    368:     $request->rflush();
                    369: }
                    370: 
1.74      albertel  371: sub analyze {
1.101     albertel  372:     my ($request,$file) = @_;
                    373:     &Apache::lonxml::debug("Analyze");
                    374:     my $result;
                    375:     my %overall;
                    376:     my %allparts;
                    377:     my $rndseed=$ENV{'form.rndseed'};
                    378:     &analyze_header($request);
1.114     albertel  379:     my %prog_state=
                    380: 	&Apache::lonhtmlcommon::Create_PrgWin($request,'Analyze Progress',
                    381: 					      'Getting Problem Variants',
                    382: 					      $ENV{'form.numtoanalyze'});
1.102     albertel  383:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  384: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
                    385: 						 'last problem');
1.101     albertel  386: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    387: 					   ('grade_target' => 'analyze'),
1.102     albertel  388: 					   ('rndseed' => $i));
                    389: 	&Apache::lonxml::debug(":$subresult:");
1.101     albertel  390: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    391: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  392: 	my @parts;
                    393: 	if (defined(@{ $analyze{'parts'} })) {
                    394: 	    @parts=@{ $analyze{'parts'} };
                    395: 	}
1.101     albertel  396: 	foreach my $part (@parts) {
                    397: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  398: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    399: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    400: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  401: 		push( @{ $overall{$part.'.answer'} },
                    402: 		      [@{ $analyze{$part.'.answer'} }]);
                    403: 	    }
                    404: 	}
                    405:     }
1.114     albertel  406:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
                    407: 					  'Analyzing Results');
1.101     albertel  408:     foreach my $part (keys(%allparts)) {
1.109     albertel  409: 	if (defined(@{ $overall{$part.'.answer'} })) {
                    410: 	    $request->print('<table><tr><td>Part '.$part.'</td></tr>');
                    411: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
                    412: 		$request->print('<tr><td>'.join('</td><td>',@{ $answer }).
                    413: 				'</td></tr>');
                    414: 	    }
                    415: 	    $request->print('</table>');
                    416: 	} else {
                    417: 	    $request->print('<p>Part '.$part.
                    418: 			    ' is not analyzabale at this time</p>');
1.101     albertel  419: 	}
                    420:     }
1.114     albertel  421:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  422:     &analyze_footer($request);
1.101     albertel  423:     &Apache::lonhomework::showhash(%overall);
                    424:     return $result;
1.74      albertel  425: }
                    426: 
1.64      albertel  427: sub editxmlmode {
                    428:   my ($request,$file) = @_;
                    429:   my $result;
                    430:   my $problem=&Apache::lonnet::getfile($file);
1.116     albertel  431:   if ($problem eq -1) {
1.64      albertel  432:     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    433:     $problem='';
                    434:   }
                    435:   if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    436:     my $error=&handle_save_or_undo($request,\$problem,
                    437: 				   \$ENV{'form.editxmltext'});
                    438:     if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    439:   }
1.80      albertel  440:   &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    441:   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
                    442:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    443:     $ENV{'form.problemmode'}='View';
                    444:     &renderpage($request,$file);
                    445:   } else {
                    446:     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.111     albertel  447:     my $xml_help = '<table><tr><td>'.
                    448: 	&Apache::loncommon::help_open_topic("Problem_Editor_XML_Index",'Problem Editing Help')
                    449: 	    .'</td><td>'.
                    450: 	&Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
                    451: 					    undef,undef,600)
                    452: 	    .'</td><td>'.
                    453:         &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
                    454: 					    undef,undef,600)
                    455: 	    .'</td></tr></table>';
1.80      albertel  456:     if ($cols > 80) { $cols = 80; }
1.89      albertel  457:     if ($cols < 70) { $cols = 70; }
                    458:     if ($rows < 20) { $rows = 20; }
1.80      albertel  459:     $result.='<html><body bgcolor="#FFFFFF">
1.64      albertel  460:             <form name="lonhomework" method="POST" action="'.
                    461: 	      $ENV{'request.uri'}.'">
                    462:             <input type="hidden" name="problemmode" value="EditXML" />
1.80      albertel  463:             <input type="submit" name="problemmode" value="Discard Edits and View" />
1.64      albertel  464:             <input type="submit" name="problemmode" value="Edit" />
                    465:             <hr />
                    466:             <input type="submit" name="submit" value="Submit Changes" />
1.80      albertel  467:             <input type="submit" name="submit" value="Submit Changes and View" />
1.64      albertel  468:             <input type="submit" name="Undo" value="undo" />
                    469:             <hr />
1.110     albertel  470:             ' . $xml_help . '
1.64      albertel  471:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73      albertel  472: 	      &HTML::Entities::encode($problem).'</textarea>
1.64      albertel  473:             </form></body></html>';
1.80      albertel  474:     $request->print($result);
                    475:   }
1.64      albertel  476:   return '';
1.47      albertel  477: }
                    478: 
1.41      albertel  479: sub renderpage {
1.52      albertel  480:   my ($request,$file) = @_;
                    481: 
                    482:   my (@targets) = &get_target();
1.70      albertel  483:   &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52      albertel  484:   foreach my $target (@targets) {
                    485:     #my $t0 = [&gettimeofday()];
                    486:     my $problem=&Apache::lonnet::getfile($file);
1.117     albertel  487:     if ($problem eq -1) {
1.52      albertel  488:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    489:       $problem='';
                    490:     }
                    491: 
                    492:     my %mystyle;
                    493:     my $result = '';
1.109     albertel  494:     if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1.85      albertel  495:     if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    496:     if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
1.52      albertel  497: 
1.70      albertel  498:     &Apache::lonxml::debug("Should be parsing now");
1.78      albertel  499:     $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.98      albertel  500: 			&setup_vars($target),%mystyle);
1.113     albertel  501:     undef($Apache::lonhomework::parsing_a_problem);
1.52      albertel  502:     #$request->print("Result follows:");
                    503:     if ($target eq 'modified') {
                    504:       &handle_save_or_undo($request,\$problem,\$result);
                    505:     } else {
1.74      albertel  506:       if ($target eq 'analyze') {
                    507: 	$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75      albertel  508: 	undef(%Apache::lonhomework::analyze);
1.74      albertel  509:       }
1.52      albertel  510:       #my $td=&tv_interval($t0);
                    511:       #if ( $Apache::lonxml::debug) {
                    512: 	#$result =~ s:</body>::;
                    513: 	#$result.="<br />Spent $td seconds processing target $target\n</body>";
                    514:       #}
                    515:       $request->print($result);
1.112     albertel  516:       $request->rflush();
1.52      albertel  517:     }
                    518:     #$request->print(":Result ends");
                    519:     #my $td=&tv_interval($t0);
                    520:   }
1.41      albertel  521: }
                    522: 
1.42      albertel  523: # with no arg it returns a HTML <option> list of the template titles
                    524: # with one arg it returns the filename associated with the arg passed
                    525: sub get_template_list {
1.52      albertel  526:   my ($namewanted,$extension) = @_;
                    527:   my $result;
1.85      albertel  528:   my @allnames;
1.52      albertel  529:   &Apache::lonxml::debug("Looking for :$extension:");
1.91      albertel  530:   foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1.52      albertel  531:     my $name=&Apache::lonnet::metadata($file,'title');
                    532:     if ($namewanted && ($name eq $namewanted)) {
                    533:       $result=$file;
                    534:       last;
                    535:     } else {
1.104     www       536: 	if ($name) { push (@allnames, $name); }
1.42      albertel  537:     }
1.52      albertel  538:   }
1.86      albertel  539:   if (@allnames && !$result) {
1.115     www       540:     $result="<option>Select a $extension template</option>\n<option>".
1.85      albertel  541:       join('</option><option>',sort(@allnames)).'</option>';
                    542:   }
1.52      albertel  543:   return $result;
1.42      albertel  544: }
                    545: 
                    546: sub newproblem {
1.65      matthew   547:     my ($request) = @_;
                    548:     my $extension=$request->uri;
                    549:     $extension=~s:^.*\.([\w]+)$:$1:;
                    550:     &Apache::lonxml::debug("Looking for :$extension:");
1.85      albertel  551:     if ($ENV{'form.template'} &&
                    552: 	$ENV{'form.template'} ne "Select a $extension type") {
1.65      matthew   553: 	use File::Copy;
                    554: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    555: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    556: 	copy($file,$dest);
                    557: 	&renderpage($request,$dest);
                    558:     } elsif($ENV{'form.newfile'}) {
                    559: 	# I don't like hard-coded filenames but for now, this will work.
                    560: 	use File::Copy;
                    561: 	my $templatefilename = 
1.66      albertel  562: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    563: 	&Apache::lonxml::debug("$templatefilename");
1.65      matthew   564: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    565: 	copy($templatefilename,$dest);
                    566: 	&renderpage($request,$dest);
1.85      albertel  567:     } else {
1.65      matthew   568: 	my $templatelist=&get_template_list('',$extension);
                    569: 	my $url=$request->uri;
                    570: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.85      albertel  571: 	my $instructions;
1.105     www       572: 	if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}
1.65      matthew   573: 	$request->print(<<ENDNEWPROBLEM);
1.42      albertel  574: <body bgcolor="#FFFFFF">
1.105     www       575: <h1>Creating a new $extension resource</h1>
                    576: The requested file <tt>$url</tt> currently does not exist.
                    577: <p>
                    578: To create a new $extension$instructions click on the "Create $extension" button.
                    579: </p>
                    580: <p><form action="$url" method="POST">
1.42      albertel  581: ENDNEWPROBLEM
1.85      albertel  582: 	if (defined($templatelist)) {
                    583: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    584: 	}
                    585: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
1.105     www       586: 	$request->print("</form></p></body>");
1.65      matthew   587:     }
                    588:     return '';
1.42      albertel  589: }
                    590: 
                    591: sub view_or_edit_menu {
1.52      albertel  592:   my ($request) = @_;
                    593:   my $url=$request->uri;
                    594:   $request->print(<<EDITMENU);
1.42      albertel  595: <body bgcolor="#FFFFFF">
                    596: <form action="$url" method="POST">
                    597: Would you like to <input type="submit" name="problemmode" value="View"> or
                    598: <input type="submit" name="problemmode" value="Edit"> the problem.
                    599: </form>
                    600: </body>
                    601: EDITMENU
                    602: }
                    603: 
1.41      albertel  604: sub handler {
1.52      albertel  605:   #my $t0 = [&gettimeofday()];
                    606:   my $request=$_[0];
1.41      albertel  607: 
1.95      albertel  608:   $Apache::lonxml::debug=$ENV{'user.debug'};
1.41      albertel  609: 
                    610:   if (&setupheader($request)) { return OK; }
1.52      albertel  611:   $ENV{'request.uri'}=$request->uri;
1.41      albertel  612: 
                    613:   #setup permissions
1.52      albertel  614:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    615:   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    616:   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71      albertel  617:   # some times multiple problemmodes are submitted, need to select
                    618:   # the last one
1.80      albertel  619:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.72      albertel  620:   if ( defined($ENV{'form.problemmode'}) &&
1.77      albertel  621:        ref($ENV{'form.problemmode'}) ) {
1.80      albertel  622:     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
1.72      albertel  623:     my $mode=$ENV{'form.problemmode'}->[-1];
1.71      albertel  624:     undef $ENV{'form.problemmode'};
1.72      albertel  625:     $ENV{'form.problemmode'}=$mode;
1.71      albertel  626:   }
1.64      albertel  627:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52      albertel  628:   my $file=&Apache::lonnet::filelocation("",$request->uri);
                    629: 
                    630:   #check if we know where we are
                    631:   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    632:     # if we are browsing we might not be able to know where we are
                    633:     if ($Apache::lonhomework::browse ne 'F') {
                    634:       #should know where we are, so ask
                    635:       $request->internal_redirect('/adm/ambiguous'); return;
1.41      albertel  636:     }
1.52      albertel  637:   }
1.41      albertel  638: 
1.118     albertel  639:   my ($symb) = &Apache::lonxml::whichuser();
                    640:   &Apache::lonxml::debug('symb is '.$symb);
                    641:   if ($ENV{'request.state'} eq "construct" || $symb eq '') {
                    642:       if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||
                    643: 	  $ENV{'form.resetdata'} eq 'New Problem Variation' ) {
                    644: 	  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    645: 	  &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    646:       }
                    647:   }
1.52      albertel  648:   if ($ENV{'request.state'} eq "construct") {
                    649:     if ( -e $file ) {
                    650:       if (!(defined $ENV{'form.problemmode'})) {
                    651: 	#first visit to problem in construction space
1.64      albertel  652: 	#&view_or_edit_menu($request);
                    653: 	$ENV{'form.problemmode'}='View';
                    654: 	&renderpage($request,$file);
                    655:       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
                    656: 	&editxmlmode($request,$file);
1.74      albertel  657:       } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {
                    658: 	&analyze($request,$file);
1.52      albertel  659:       } else {
                    660: 	&renderpage($request,$file);
1.41      albertel  661:       }
                    662:     } else {
1.52      albertel  663:       # requested file doesn't exist in contruction space
                    664:       &newproblem($request);
1.41      albertel  665:     }
1.52      albertel  666:   } else {
                    667:     # just render the page normally outside of construction space
1.74      albertel  668:     &Apache::lonxml::debug("not construct");
1.52      albertel  669:     &renderpage($request,$file);
                    670:   }
                    671:   #my $td=&tv_interval($t0);
                    672:   #&Apache::lonxml::debug("Spent $td seconds processing");
                    673:   # &Apache::lonhomework::send_footer($request);
                    674:   # always turn off debug messages
                    675:   $Apache::lonxml::debug=0;
                    676:   return OK;
                    677: 
1.1       albertel  678: }
                    679: 
                    680: 1;
                    681: __END__

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