Annotation of loncom/homework/lonhomework.pm, revision 1.144

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.144   ! albertel    4: # $Id: lonhomework.pm,v 1.143 2003/09/17 17:50:49 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();
1.137     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 {
1.126     www        64:   if (($ENV{'request.state'} eq "published") ||
                     65:       ($ENV{'request.state'} eq "uploaded")) {
1.90      sakharuk   66:     if ( defined($ENV{'form.grade_target'}  ) 
                     67: 	 && ($ENV{'form.grade_target'} eq 'tex')) {
                     68:       return ($ENV{'form.grade_target'});
                     69:     } elsif ( defined($ENV{'form.grade_target'}  ) 
1.119     albertel   70: 	 && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.139     sakharuk   71:       return ($ENV{'form.grade_target'});
1.66      albertel   72:     }
1.90      sakharuk   73:  
1.118     albertel   74:     if ( defined($ENV{'form.submitted'}) &&
1.138     albertel   75: 	 ( !defined($ENV{'form.resetdata'})) &&
                     76: 	 ( !defined($ENV{'form.newrandomization'}))) {
1.52      albertel   77:       return ('grade', 'web');
                     78:     } else {
                     79:       return ('web');
                     80:     }
                     81:   } elsif ($ENV{'request.state'} eq "construct") {
1.74      albertel   82:     if ( defined($ENV{'form.grade_target'}) ) {
                     83:       return ($ENV{'form.grade_target'});
                     84:     }
1.62      albertel   85:     if ( defined($ENV{'form.preview'})) {
                     86:       if ( defined($ENV{'form.submitted'})) {
1.52      albertel   87: 	return ('grade', 'web');
                     88:       } else {
                     89: 	return ('web');
                     90:       }
                     91:     } else {
1.88      albertel   92:       if ( $ENV{'form.problemmode'} eq 'View' ||
                     93: 	   $ENV{'form.problemmode'} eq 'Discard Edits and View') {
1.62      albertel   94: 	if ( defined($ENV{'form.submitted'}) &&
1.138     albertel   95: 	     (!defined($ENV{'form.resetdata'})) &&
                     96: 	     (!defined($ENV{'form.newrandomization'}))) {
1.60      albertel   97: 	  return ('grade', 'web','answer');
1.42      albertel   98: 	} else {
1.60      albertel   99: 	  return ('web','answer');
1.42      albertel  100: 	}
1.52      albertel  101:       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
                    102: 	if ( $ENV{'form.submitted'} eq 'edit' ) {
1.80      albertel  103: 	  if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
1.81      albertel  104: 	    return ('modified','web','answer');
1.80      albertel  105: 	  } else {
                    106: 	    return ('modified','edit');
                    107: 	  }
1.42      albertel  108: 	} else {
1.52      albertel  109: 	  return ('edit');
1.42      albertel  110: 	}
1.52      albertel  111:       } else {
                    112: 	return ('web');
                    113:       }
1.15      albertel  114:     }
1.52      albertel  115:   }
                    116:   return ();
1.5       albertel  117: }
                    118: 
1.3       albertel  119: sub setup_vars {
1.52      albertel  120:   my ($target) = @_;
                    121:   return ';'
1.11      albertel  122: #  return ';$external::target='.$target.';';
1.2       albertel  123: }
                    124: 
                    125: sub send_header {
1.52      albertel  126:   my ($request)= @_;
                    127:   $request->print(&Apache::lontexconvert::header());
1.16      albertel  128: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  129: }
                    130: 
1.36      albertel  131: sub createmenu {
1.52      albertel  132:   my ($which,$request)=@_;
                    133:   if ($which eq 'grade') {
                    134:     $request->print('<script language="JavaScript"> 
1.91      albertel  135:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  136:                  "height=350,width=150,menubar=no");
                    137:           </script>');
                    138:   }
1.36      albertel  139: }
                    140: 
1.2       albertel  141: sub send_footer {
1.52      albertel  142:   my ($request)= @_;
1.16      albertel  143: #  $request->print('</form>');
1.52      albertel  144:   $request->print(&Apache::lontexconvert::footer());
1.2       albertel  145: }
                    146: 
1.52      albertel  147: $Apache::lonxml::browse='';
1.53      www       148: 
1.92      bowersj2  149: # JB, 9/24/2002: Any changes in this function may require a change
                    150: # in lonnavmaps::resource::getDateStatus.
1.53      www       151: sub check_access {
1.52      albertel  152:   my ($id) = @_;
                    153:   my $date ='';
1.103     albertel  154:   my $status;
1.52      albertel  155:   my $datemsg = '';
                    156:   my $lastdate = '';
                    157:   my $temp;
                    158:   my $type;
                    159:   my $passed;
1.106     albertel  160: 
                    161:   if ($ENV{'request.state'} eq "construct") {
                    162:     &Apache::lonxml::debug("in construction ignoring dates");
                    163:     $status='CAN_ANSWER';
                    164:     $datemsg='is in under construction';
                    165:     return ($status,$datemsg);
                    166:   }
                    167: 
1.52      albertel  168:   &Apache::lonxml::debug("checking for part :$id:");
1.73      albertel  169:   &Apache::lonxml::debug("time:".time);
1.52      albertel  170:   foreach $temp ("opendate","duedate","answerdate") {
                    171:     $lastdate = $date;
                    172:     $date = &Apache::lonnet::EXT("resource.$id.$temp");
1.87      www       173:     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
1.103     albertel  174:     if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    175: 	$date     =~ /^(con_lost|no_such_host)/) {
                    176: 	$status='UNAVAILABLE';
                    177: 	$date="may open later.";
                    178: 	return($status,$date);
                    179:     }
1.87      www       180:     if ($thistype eq 'date_interval') {
                    181: 	if ($temp eq 'opendate') {
                    182:            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    183:         }
                    184:         if ($temp eq 'answerdate') {
                    185:            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    186:         }
                    187:     }
1.52      albertel  188:     &Apache::lonxml::debug("found :$date: for :$temp:");
                    189:     if ($date eq '') {
                    190:       $date = "an unknown date"; $passed = 0;
                    191:     } elsif ($date eq 'con_lost') {
                    192:       $date = "an indeterminate date"; $passed = 0;
                    193:     } else {
                    194:       if (time < $date) { $passed = 0; } else { $passed = 1; }
                    195:       $date = localtime $date;
1.51      harris41  196:     }
1.52      albertel  197:     if (!$passed) { $type=$temp; last; }
                    198:   }
                    199:   &Apache::lonxml::debug("have :$type:$passed:");
                    200:   if ($passed) {
                    201:     $status='SHOW_ANSWER';
                    202:     $datemsg=$date;
                    203:   } elsif ($type eq 'opendate') {
                    204:     $status='CLOSED';
                    205:     $datemsg = "will open on $date";
                    206:   } elsif ($type eq 'duedate') {
                    207:     $status='CAN_ANSWER';
                    208:     $datemsg = "is due at $date";
                    209:   } elsif ($type eq 'answerdate') {
                    210:     $status='CLOSED';
                    211:     $datemsg = "was due on $lastdate, and answers will be available on $date";
                    212:   }
                    213:   if ($status eq 'CAN_ANSWER') {
1.121     albertel  214:     #check #tries, and if correct.
1.52      albertel  215:     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    216:     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    217:     if ( $tries eq '' ) { $tries = '0'; }
                    218:     if ( $maxtries eq '' ) { $maxtries = '2'; } 
1.129     albertel  219:     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
                    220:     # if (correct and show prob status) or excused then CANNOT_ANSWER
                    221:     if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    222: 	&&
                    223: 	lc($Apache::lonhomework::problemstatus) ne 'no')
                    224:        ||
                    225:        $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
1.121     albertel  226: 	$status = 'CANNOT_ANSWER';
                    227:     }
1.52      albertel  228:   }
1.54      www       229: 
1.133     albertel  230:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    231:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    232:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    233:   #}
1.54      www       234: 
                    235: 
1.52      albertel  236:   &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    237:   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
1.91      albertel  238:     &Apache::lonxml::debug("should be allowed to browse a resource when closed");
1.52      albertel  239:     $status='CAN_ANSWER';
                    240:     $datemsg='is closed but you are allowed to view it';
                    241:   }
1.106     albertel  242: 
1.52      albertel  243:   return ($status,$datemsg);
1.20      albertel  244: }
                    245: 
1.41      albertel  246: sub showhash {
1.52      albertel  247:   my (%hash) = @_;
1.99      albertel  248:   &showhashsubset(\%hash,'.');
1.79      albertel  249:   return '';
                    250: }
                    251: 
1.106     albertel  252: sub showarray {
                    253:     my ($array)=@_;
                    254:     my $string="(";
                    255:     foreach my $elm (@{ $array }) {
                    256: 	if (ref($elm)) {
                    257: 	    if ($elm =~ /ARRAY/ ) {
                    258: 		$string.=&showarray($elm);
                    259: 	    }
                    260: 	} else {
                    261: 	    $string.="$elm,"
                    262: 	}
                    263:     }
                    264:     chop($string);
                    265:     $string.=")";
                    266:     return $string;
                    267: }
                    268: 
1.79      albertel  269: sub showhashsubset {
                    270:   my ($hash,$keyre) = @_;
1.52      albertel  271:   my $resultkey;
1.79      albertel  272:   foreach $resultkey (sort keys %$hash) {
                    273:     if ($resultkey =~ /$keyre/) {
                    274:       if (ref($$hash{$resultkey})) {
                    275: 	if ($$hash{$resultkey} =~ /ARRAY/ ) {
1.106     albertel  276: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    277: 				   &showarray($$hash{$resultkey}));
                    278: 	} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    279: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    280: 	    &showhashsubset($$hash{$resultkey},'.');
1.79      albertel  281: 	} else {
1.106     albertel  282: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  283: 	}
                    284:       } else {
1.79      albertel  285: 	&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  286:       }
                    287:     }
1.52      albertel  288:   }
                    289:   &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    290:   return '';
1.41      albertel  291: }
                    292: 
                    293: sub setuppermissions {
1.52      albertel  294:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
1.127     matthew   295:   my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    296:   if (! $viewgrades && 
                    297:       exists($ENV{'request.course.sec'}) && 
                    298:       $ENV{'request.course.sec'} !~ /^\s*$/) {
                    299:       $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
                    300:                                                '/'.$ENV{'request.course.sec'});
                    301:   }
                    302:   $Apache::lonhomework::viewgrades = $viewgrades;
1.52      albertel  303:   return ''
1.41      albertel  304: }
                    305: 
                    306: sub setupheader {
1.120     albertel  307:     my $request=$_[0];
                    308:     if ($ENV{'browser.mathml'}) {
                    309: 	$request->content_type('text/xml');
                    310:     } else {
                    311: 	$request->content_type('text/html');
                    312:     }
                    313:     $request->content_encoding('UTF-8');
                    314:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    315: 	&Apache::loncommon::no_cache($request);
                    316:     }
                    317:     $request->send_http_header;
                    318:     return OK if $request->header_only;
                    319:     return ''
1.41      albertel  320: }
1.35      albertel  321: 
1.47      albertel  322: sub handle_save_or_undo {
1.52      albertel  323:   my ($request,$problem,$result) = @_;
1.70      albertel  324:   my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    325:   my $filebak =$file.".bak";
                    326:   my $filetmp =$file.".tmp";
1.64      albertel  327:   my $error=0;
1.52      albertel  328: 
                    329:   if ($ENV{'form.Undo'} eq 'undo') {
1.70      albertel  330:     my $error=0;
                    331:     if (!copy($file,$filetmp)) { $error=1; }
                    332:     if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    333:     if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    334:     if (!$error) {
                    335:       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52      albertel  336:     } else {
1.70      albertel  337:       $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64      albertel  338:       $error=1;
1.52      albertel  339:     }
                    340:   } else {
1.70      albertel  341:     my $fs=Apache::File->new(">$filebak");
1.52      albertel  342:     if (defined($fs)) {
                    343:       print $fs $$problem;
1.70      albertel  344:       $request->print("<b>Making Backup to $filebak</b><br />");
1.52      albertel  345:     } else {
1.70      albertel  346:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64      albertel  347:       $error=2;
1.52      albertel  348:     }
1.70      albertel  349:     my $fh=Apache::File->new(">$file");
1.52      albertel  350:     if (defined($fh)) {
                    351:       print $fh $$result;
1.70      albertel  352:       $request->print("<b>Saving Modifications to $file</b><br />");
1.47      albertel  353:     } else {
1.70      albertel  354:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64      albertel  355:       $error|=4;
1.47      albertel  356:     }
1.52      albertel  357:   }
1.64      albertel  358:   return $error;
                    359: }
                    360: 
1.101     albertel  361: sub analyze_header {
                    362:     my ($request) = @_;
1.109     albertel  363:     my $result.='<html>
                    364:             <head><title>Analyzing a problem</title></head>
                    365:             <body bgcolor="#FFFFFF">
1.101     albertel  366:             <form name="lonhomework" method="POST" action="'.
                    367: 	      $ENV{'request.uri'}.'">
                    368:             <input type="submit" name="problemmode" value="EditXML" />
                    369:             <input type="submit" name="problemmode" value="Edit" />
                    370:             <hr />
                    371:             <input type="submit" name="submit" value="View" />
                    372:             <hr />
                    373:             List of possible answers:
                    374:             </form>';
                    375:     $request->print($result);
                    376:     $request->rflush();
                    377: }
                    378: 
1.109     albertel  379: sub analyze_footer {
                    380:     my ($request) = @_;
                    381:     my $result='</body></html>';
                    382:     $request->print($result);
                    383:     $request->rflush();
                    384: }
                    385: 
1.74      albertel  386: sub analyze {
1.101     albertel  387:     my ($request,$file) = @_;
                    388:     &Apache::lonxml::debug("Analyze");
                    389:     my $result;
                    390:     my %overall;
                    391:     my %allparts;
                    392:     my $rndseed=$ENV{'form.rndseed'};
                    393:     &analyze_header($request);
1.114     albertel  394:     my %prog_state=
                    395: 	&Apache::lonhtmlcommon::Create_PrgWin($request,'Analyze Progress',
                    396: 					      'Getting Problem Variants',
                    397: 					      $ENV{'form.numtoanalyze'});
1.102     albertel  398:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  399: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
                    400: 						 'last problem');
1.101     albertel  401: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    402: 					   ('grade_target' => 'analyze'),
1.130     albertel  403: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  404: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    405: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  406: 	my @parts;
                    407: 	if (defined(@{ $analyze{'parts'} })) {
                    408: 	    @parts=@{ $analyze{'parts'} };
                    409: 	}
1.101     albertel  410: 	foreach my $part (@parts) {
                    411: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  412: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    413: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    414: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  415: 		push( @{ $overall{$part.'.answer'} },
                    416: 		      [@{ $analyze{$part.'.answer'} }]);
                    417: 	    }
                    418: 	}
                    419:     }
1.114     albertel  420:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
                    421: 					  'Analyzing Results');
1.134     albertel  422:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  423: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  424: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
                    425: 	    $request->print('<table><tr><td colspan="'.($num_cols+1).'">Part '.$part.'</td></tr>');
1.130     albertel  426: 	    my %frequency;
1.109     albertel  427: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  428: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  429: 	    }
1.132     albertel  430: 	    $request->print('<tr><td colspan="'.($num_cols).'">Answer</td><td>Frequency</td></tr>');
                    431: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    432: 		$request->print('<tr><td align="right">'.
                    433: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  434: 				'</td><td>('.$frequency{$answer}.
                    435: 				')</td></tr>');
1.109     albertel  436: 	    }
                    437: 	    $request->print('</table>');
                    438: 	} else {
                    439: 	    $request->print('<p>Part '.$part.
1.130     albertel  440: 			    ' is not analyzable at this time</p>');
1.101     albertel  441: 	}
                    442:     }
1.130     albertel  443:     if (scalar(keys(%allparts)) == 0 ) {
                    444: 	$request->print('<p>Found no analyzable parts in this problem,
                    445:                          currently only Numerical, Formula and String response
                    446:                          styles are supported.</p>');
                    447:     }
1.114     albertel  448:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  449:     &analyze_footer($request);
1.101     albertel  450:     &Apache::lonhomework::showhash(%overall);
                    451:     return $result;
1.74      albertel  452: }
                    453: 
1.64      albertel  454: sub editxmlmode {
                    455:   my ($request,$file) = @_;
                    456:   my $result;
                    457:   my $problem=&Apache::lonnet::getfile($file);
1.116     albertel  458:   if ($problem eq -1) {
1.64      albertel  459:     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    460:     $problem='';
                    461:   }
                    462:   if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    463:     my $error=&handle_save_or_undo($request,\$problem,
                    464: 				   \$ENV{'form.editxmltext'});
                    465:     if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    466:   }
1.80      albertel  467:   &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    468:   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
                    469:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    470:     $ENV{'form.problemmode'}='View';
                    471:     &renderpage($request,$file);
                    472:   } else {
                    473:     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.136     bowersj2  474:     my $xml_help = Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    475: 							  "Problem Editing Help");
1.80      albertel  476:     if ($cols > 80) { $cols = 80; }
1.89      albertel  477:     if ($cols < 70) { $cols = 70; }
                    478:     if ($rows < 20) { $rows = 20; }
1.80      albertel  479:     $result.='<html><body bgcolor="#FFFFFF">
1.64      albertel  480:             <form name="lonhomework" method="POST" action="'.
                    481: 	      $ENV{'request.uri'}.'">
                    482:             <input type="hidden" name="problemmode" value="EditXML" />
1.80      albertel  483:             <input type="submit" name="problemmode" value="Discard Edits and View" />
1.64      albertel  484:             <input type="submit" name="problemmode" value="Edit" />
                    485:             <hr />
                    486:             <input type="submit" name="submit" value="Submit Changes" />
1.80      albertel  487:             <input type="submit" name="submit" value="Submit Changes and View" />
1.64      albertel  488:             <input type="submit" name="Undo" value="undo" />
                    489:             <hr />
1.110     albertel  490:             ' . $xml_help . '
1.64      albertel  491:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73      albertel  492: 	      &HTML::Entities::encode($problem).'</textarea>
1.64      albertel  493:             </form></body></html>';
1.80      albertel  494:     $request->print($result);
                    495:   }
1.64      albertel  496:   return '';
1.47      albertel  497: }
                    498: 
1.41      albertel  499: sub renderpage {
1.52      albertel  500:   my ($request,$file) = @_;
                    501: 
                    502:   my (@targets) = &get_target();
1.70      albertel  503:   &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52      albertel  504:   foreach my $target (@targets) {
                    505:     #my $t0 = [&gettimeofday()];
                    506:     my $problem=&Apache::lonnet::getfile($file);
1.117     albertel  507:     if ($problem eq -1) {
1.52      albertel  508:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    509:       $problem='';
                    510:     }
                    511: 
                    512:     my %mystyle;
                    513:     my $result = '';
1.109     albertel  514:     if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1.85      albertel  515:     if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    516:     if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
1.52      albertel  517: 
1.70      albertel  518:     &Apache::lonxml::debug("Should be parsing now");
1.78      albertel  519:     $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.98      albertel  520: 			&setup_vars($target),%mystyle);
1.113     albertel  521:     undef($Apache::lonhomework::parsing_a_problem);
1.52      albertel  522:     #$request->print("Result follows:");
                    523:     if ($target eq 'modified') {
                    524:       &handle_save_or_undo($request,\$problem,\$result);
                    525:     } else {
1.74      albertel  526:       if ($target eq 'analyze') {
                    527: 	$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75      albertel  528: 	undef(%Apache::lonhomework::analyze);
1.74      albertel  529:       }
1.52      albertel  530:       #my $td=&tv_interval($t0);
                    531:       #if ( $Apache::lonxml::debug) {
                    532: 	#$result =~ s:</body>::;
                    533: 	#$result.="<br />Spent $td seconds processing target $target\n</body>";
                    534:       #}
                    535:       $request->print($result);
1.112     albertel  536:       $request->rflush();
1.52      albertel  537:     }
                    538:     #$request->print(":Result ends");
                    539:     #my $td=&tv_interval($t0);
                    540:   }
1.41      albertel  541: }
                    542: 
1.42      albertel  543: # with no arg it returns a HTML <option> list of the template titles
                    544: # with one arg it returns the filename associated with the arg passed
                    545: sub get_template_list {
1.52      albertel  546:   my ($namewanted,$extension) = @_;
                    547:   my $result;
1.85      albertel  548:   my @allnames;
1.52      albertel  549:   &Apache::lonxml::debug("Looking for :$extension:");
1.91      albertel  550:   foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1.52      albertel  551:     my $name=&Apache::lonnet::metadata($file,'title');
                    552:     if ($namewanted && ($name eq $namewanted)) {
                    553:       $result=$file;
                    554:       last;
                    555:     } else {
1.104     www       556: 	if ($name) { push (@allnames, $name); }
1.42      albertel  557:     }
1.52      albertel  558:   }
1.86      albertel  559:   if (@allnames && !$result) {
1.115     www       560:     $result="<option>Select a $extension template</option>\n<option>".
1.128     albertel  561: 	join('</option><option>',sort(@allnames)).'</option>';
1.85      albertel  562:   }
1.52      albertel  563:   return $result;
1.42      albertel  564: }
                    565: 
                    566: sub newproblem {
1.65      matthew   567:     my ($request) = @_;
                    568:     my $extension=$request->uri;
                    569:     $extension=~s:^.*\.([\w]+)$:$1:;
                    570:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  571:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  572:     if ($ENV{'form.template'} &&
1.128     albertel  573: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   574: 	use File::Copy;
                    575: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    576: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    577: 	copy($file,$dest);
                    578: 	&renderpage($request,$dest);
1.131     albertel  579:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    580: 	# I don't like hard-coded filenames but for now, this will work.
                    581: 	use File::Copy;
                    582: 	my $templatefilename =
                    583: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    584: 	&Apache::lonxml::debug("$templatefilename");
                    585: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    586: 	copy($templatefilename,$dest);
                    587: 	&renderpage($request,$dest);
1.85      albertel  588:     } else {
1.65      matthew   589: 	my $url=$request->uri;
                    590: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  591: 	my $errormsg;
                    592: 	if ($ENV{'form.newfile'}) {
                    593: 	    $errormsg='<p><font color="red">You did not select a template.</font></p>'."\n";
                    594: 	}
1.85      albertel  595: 	my $instructions;
1.105     www       596: 	if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}
1.65      matthew   597: 	$request->print(<<ENDNEWPROBLEM);
1.42      albertel  598: <body bgcolor="#FFFFFF">
1.105     www       599: <h1>Creating a new $extension resource</h1>
1.128     albertel  600: $errormsg
1.105     www       601: The requested file <tt>$url</tt> currently does not exist.
                    602: <p>
1.128     albertel  603: <b>To create a new $extension$instructions click on the "Create $extension" button.</b>
1.105     www       604: </p>
                    605: <p><form action="$url" method="POST">
1.42      albertel  606: ENDNEWPROBLEM
1.85      albertel  607: 	if (defined($templatelist)) {
                    608: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    609: 	}
                    610: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
1.105     www       611: 	$request->print("</form></p></body>");
1.65      matthew   612:     }
                    613:     return '';
1.42      albertel  614: }
                    615: 
                    616: sub view_or_edit_menu {
1.52      albertel  617:   my ($request) = @_;
                    618:   my $url=$request->uri;
                    619:   $request->print(<<EDITMENU);
1.42      albertel  620: <body bgcolor="#FFFFFF">
                    621: <form action="$url" method="POST">
                    622: Would you like to <input type="submit" name="problemmode" value="View"> or
                    623: <input type="submit" name="problemmode" value="Edit"> the problem.
                    624: </form>
                    625: </body>
                    626: EDITMENU
                    627: }
                    628: 
1.41      albertel  629: sub handler {
1.52      albertel  630:   #my $t0 = [&gettimeofday()];
                    631:   my $request=$_[0];
1.41      albertel  632: 
1.95      albertel  633:   $Apache::lonxml::debug=$ENV{'user.debug'};
1.41      albertel  634: 
                    635:   if (&setupheader($request)) { return OK; }
1.52      albertel  636:   $ENV{'request.uri'}=$request->uri;
1.41      albertel  637: 
                    638:   #setup permissions
1.52      albertel  639:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    640:   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    641:   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71      albertel  642:   # some times multiple problemmodes are submitted, need to select
                    643:   # the last one
1.80      albertel  644:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.72      albertel  645:   if ( defined($ENV{'form.problemmode'}) &&
1.77      albertel  646:        ref($ENV{'form.problemmode'}) ) {
1.80      albertel  647:     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
1.72      albertel  648:     my $mode=$ENV{'form.problemmode'}->[-1];
1.71      albertel  649:     undef $ENV{'form.problemmode'};
1.72      albertel  650:     $ENV{'form.problemmode'}=$mode;
1.71      albertel  651:   }
1.64      albertel  652:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52      albertel  653:   my $file=&Apache::lonnet::filelocation("",$request->uri);
                    654: 
                    655:   #check if we know where we are
                    656:   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    657:     # if we are browsing we might not be able to know where we are
                    658:     if ($Apache::lonhomework::browse ne 'F') {
                    659:       #should know where we are, so ask
1.144   ! albertel  660: 	if ( &Apache::lonnet::mod_perl_version() == 2 ) {
1.140     albertel  661: 	    &Apache::lonnet::cleanenv();
1.142     albertel  662: 	}
1.140     albertel  663: 	$request->internal_redirect('/adm/ambiguous'); return;
1.41      albertel  664:     }
1.52      albertel  665:   }
1.41      albertel  666: 
1.118     albertel  667:   my ($symb) = &Apache::lonxml::whichuser();
                    668:   &Apache::lonxml::debug('symb is '.$symb);
                    669:   if ($ENV{'request.state'} eq "construct" || $symb eq '') {
                    670:       if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||
1.138     albertel  671: 	  $ENV{'form.resetdata'} eq 'New Problem Variation' ||
                    672:           $ENV{'form.newrandomization'} eq 'New Randomization') {
1.118     albertel  673: 	  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    674: 	  &Apache::lonnet::tmpreset($symb,'',$domain,$name);
1.138     albertel  675: &Apache::lonxml::debug("Attempt reset");
1.118     albertel  676:       }
                    677:   }
1.52      albertel  678:   if ($ENV{'request.state'} eq "construct") {
                    679:     if ( -e $file ) {
1.135     www       680:       &Apache::loncommon::get_unprocessed_cgi
                    681:                           ($ENV{'QUERY_STRING'},['problemmode']);
1.52      albertel  682:       if (!(defined $ENV{'form.problemmode'})) {
                    683: 	#first visit to problem in construction space
1.64      albertel  684: 	#&view_or_edit_menu($request);
                    685: 	$ENV{'form.problemmode'}='View';
                    686: 	&renderpage($request,$file);
                    687:       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
                    688: 	&editxmlmode($request,$file);
1.130     albertel  689:       } elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {
1.74      albertel  690: 	&analyze($request,$file);
1.52      albertel  691:       } else {
                    692: 	&renderpage($request,$file);
1.41      albertel  693:       }
                    694:     } else {
1.52      albertel  695:       # requested file doesn't exist in contruction space
                    696:       &newproblem($request);
1.41      albertel  697:     }
1.52      albertel  698:   } else {
                    699:     # just render the page normally outside of construction space
1.74      albertel  700:     &Apache::lonxml::debug("not construct");
1.52      albertel  701:     &renderpage($request,$file);
                    702:   }
                    703:   #my $td=&tv_interval($t0);
                    704:   #&Apache::lonxml::debug("Spent $td seconds processing");
                    705:   # &Apache::lonhomework::send_footer($request);
                    706:   # always turn off debug messages
                    707:   $Apache::lonxml::debug=0;
                    708:   return OK;
                    709: 
1.1       albertel  710: }
                    711: 
                    712: 1;
                    713: __END__

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