Annotation of loncom/homework/lonhomework.pm, revision 1.136

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.136   ! bowersj2    4: # $Id: lonhomework.pm,v 1.135 2003/06/16 21:32:43 www 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 {
1.126     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: 	 && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.66      albertel   71:       return ($ENV{'form.grade_target'});
                     72:     }
1.90      sakharuk   73:  
1.118     albertel   74:     if ( defined($ENV{'form.submitted'}) &&
                     75: 	 ( !defined($ENV{'form.resetdata'}))) {
1.52      albertel   76:       return ('grade', 'web');
                     77:     } else {
                     78:       return ('web');
                     79:     }
                     80:   } elsif ($ENV{'request.state'} eq "construct") {
1.74      albertel   81:     if ( defined($ENV{'form.grade_target'}) ) {
                     82:       return ($ENV{'form.grade_target'});
                     83:     }
1.62      albertel   84:     if ( defined($ENV{'form.preview'})) {
                     85:       if ( defined($ENV{'form.submitted'})) {
1.52      albertel   86: 	return ('grade', 'web');
                     87:       } else {
                     88: 	return ('web');
                     89:       }
                     90:     } else {
1.88      albertel   91:       if ( $ENV{'form.problemmode'} eq 'View' ||
                     92: 	   $ENV{'form.problemmode'} eq 'Discard Edits and View') {
1.62      albertel   93: 	if ( defined($ENV{'form.submitted'}) &&
                     94: 	     (!defined($ENV{'form.resetdata'})) ) {
1.60      albertel   95: 	  return ('grade', 'web','answer');
1.42      albertel   96: 	} else {
1.60      albertel   97: 	  return ('web','answer');
1.42      albertel   98: 	}
1.52      albertel   99:       } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
                    100: 	if ( $ENV{'form.submitted'} eq 'edit' ) {
1.80      albertel  101: 	  if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
1.81      albertel  102: 	    return ('modified','web','answer');
1.80      albertel  103: 	  } else {
                    104: 	    return ('modified','edit');
                    105: 	  }
1.42      albertel  106: 	} else {
1.52      albertel  107: 	  return ('edit');
1.42      albertel  108: 	}
1.52      albertel  109:       } else {
                    110: 	return ('web');
                    111:       }
1.15      albertel  112:     }
1.52      albertel  113:   }
                    114:   return ();
1.5       albertel  115: }
                    116: 
1.3       albertel  117: sub setup_vars {
1.52      albertel  118:   my ($target) = @_;
                    119:   return ';'
1.11      albertel  120: #  return ';$external::target='.$target.';';
1.2       albertel  121: }
                    122: 
                    123: sub send_header {
1.52      albertel  124:   my ($request)= @_;
                    125:   $request->print(&Apache::lontexconvert::header());
1.16      albertel  126: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  127: }
                    128: 
1.36      albertel  129: sub createmenu {
1.52      albertel  130:   my ($which,$request)=@_;
                    131:   if ($which eq 'grade') {
                    132:     $request->print('<script language="JavaScript"> 
1.91      albertel  133:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  134:                  "height=350,width=150,menubar=no");
                    135:           </script>');
                    136:   }
1.36      albertel  137: }
                    138: 
1.2       albertel  139: sub send_footer {
1.52      albertel  140:   my ($request)= @_;
1.16      albertel  141: #  $request->print('</form>');
1.52      albertel  142:   $request->print(&Apache::lontexconvert::footer());
1.2       albertel  143: }
                    144: 
1.52      albertel  145: $Apache::lonxml::browse='';
1.53      www       146: 
1.92      bowersj2  147: # JB, 9/24/2002: Any changes in this function may require a change
                    148: # in lonnavmaps::resource::getDateStatus.
1.53      www       149: sub check_access {
1.52      albertel  150:   my ($id) = @_;
                    151:   my $date ='';
1.103     albertel  152:   my $status;
1.52      albertel  153:   my $datemsg = '';
                    154:   my $lastdate = '';
                    155:   my $temp;
                    156:   my $type;
                    157:   my $passed;
1.106     albertel  158: 
                    159:   if ($ENV{'request.state'} eq "construct") {
                    160:     &Apache::lonxml::debug("in construction ignoring dates");
                    161:     $status='CAN_ANSWER';
                    162:     $datemsg='is in under construction';
                    163:     return ($status,$datemsg);
                    164:   }
                    165: 
1.52      albertel  166:   &Apache::lonxml::debug("checking for part :$id:");
1.73      albertel  167:   &Apache::lonxml::debug("time:".time);
1.52      albertel  168:   foreach $temp ("opendate","duedate","answerdate") {
                    169:     $lastdate = $date;
                    170:     $date = &Apache::lonnet::EXT("resource.$id.$temp");
1.87      www       171:     my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
1.103     albertel  172:     if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    173: 	$date     =~ /^(con_lost|no_such_host)/) {
                    174: 	$status='UNAVAILABLE';
                    175: 	$date="may open later.";
                    176: 	return($status,$date);
                    177:     }
1.87      www       178:     if ($thistype eq 'date_interval') {
                    179: 	if ($temp eq 'opendate') {
                    180:            $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    181:         }
                    182:         if ($temp eq 'answerdate') {
                    183:            $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    184:         }
                    185:     }
1.52      albertel  186:     &Apache::lonxml::debug("found :$date: for :$temp:");
                    187:     if ($date eq '') {
                    188:       $date = "an unknown date"; $passed = 0;
                    189:     } elsif ($date eq 'con_lost') {
                    190:       $date = "an indeterminate date"; $passed = 0;
                    191:     } else {
                    192:       if (time < $date) { $passed = 0; } else { $passed = 1; }
                    193:       $date = localtime $date;
1.51      harris41  194:     }
1.52      albertel  195:     if (!$passed) { $type=$temp; last; }
                    196:   }
                    197:   &Apache::lonxml::debug("have :$type:$passed:");
                    198:   if ($passed) {
                    199:     $status='SHOW_ANSWER';
                    200:     $datemsg=$date;
                    201:   } elsif ($type eq 'opendate') {
                    202:     $status='CLOSED';
                    203:     $datemsg = "will open on $date";
                    204:   } elsif ($type eq 'duedate') {
                    205:     $status='CAN_ANSWER';
                    206:     $datemsg = "is due at $date";
                    207:   } elsif ($type eq 'answerdate') {
                    208:     $status='CLOSED';
                    209:     $datemsg = "was due on $lastdate, and answers will be available on $date";
                    210:   }
                    211:   if ($status eq 'CAN_ANSWER') {
1.121     albertel  212:     #check #tries, and if correct.
1.52      albertel  213:     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    214:     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    215:     if ( $tries eq '' ) { $tries = '0'; }
                    216:     if ( $maxtries eq '' ) { $maxtries = '2'; } 
1.129     albertel  217:     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
                    218:     # if (correct and show prob status) or excused then CANNOT_ANSWER
                    219:     if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    220: 	&&
                    221: 	lc($Apache::lonhomework::problemstatus) ne 'no')
                    222:        ||
                    223:        $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
1.121     albertel  224: 	$status = 'CANNOT_ANSWER';
                    225:     }
1.52      albertel  226:   }
1.54      www       227: 
1.133     albertel  228:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    229:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    230:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    231:   #}
1.54      www       232: 
                    233: 
1.52      albertel  234:   &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    235:   if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
1.91      albertel  236:     &Apache::lonxml::debug("should be allowed to browse a resource when closed");
1.52      albertel  237:     $status='CAN_ANSWER';
                    238:     $datemsg='is closed but you are allowed to view it';
                    239:   }
1.106     albertel  240: 
1.52      albertel  241:   return ($status,$datemsg);
1.20      albertel  242: }
                    243: 
1.41      albertel  244: sub showhash {
1.52      albertel  245:   my (%hash) = @_;
1.99      albertel  246:   &showhashsubset(\%hash,'.');
1.79      albertel  247:   return '';
                    248: }
                    249: 
1.106     albertel  250: sub showarray {
                    251:     my ($array)=@_;
                    252:     my $string="(";
                    253:     foreach my $elm (@{ $array }) {
                    254: 	if (ref($elm)) {
                    255: 	    if ($elm =~ /ARRAY/ ) {
                    256: 		$string.=&showarray($elm);
                    257: 	    }
                    258: 	} else {
                    259: 	    $string.="$elm,"
                    260: 	}
                    261:     }
                    262:     chop($string);
                    263:     $string.=")";
                    264:     return $string;
                    265: }
                    266: 
1.79      albertel  267: sub showhashsubset {
                    268:   my ($hash,$keyre) = @_;
1.52      albertel  269:   my $resultkey;
1.79      albertel  270:   foreach $resultkey (sort keys %$hash) {
                    271:     if ($resultkey =~ /$keyre/) {
                    272:       if (ref($$hash{$resultkey})) {
                    273: 	if ($$hash{$resultkey} =~ /ARRAY/ ) {
1.106     albertel  274: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    275: 				   &showarray($$hash{$resultkey}));
                    276: 	} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    277: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    278: 	    &showhashsubset($$hash{$resultkey},'.');
1.79      albertel  279: 	} else {
1.106     albertel  280: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  281: 	}
                    282:       } else {
1.79      albertel  283: 	&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.73      albertel  284:       }
                    285:     }
1.52      albertel  286:   }
                    287:   &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    288:   return '';
1.41      albertel  289: }
                    290: 
                    291: sub setuppermissions {
1.52      albertel  292:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
1.127     matthew   293:   my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    294:   if (! $viewgrades && 
                    295:       exists($ENV{'request.course.sec'}) && 
                    296:       $ENV{'request.course.sec'} !~ /^\s*$/) {
                    297:       $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
                    298:                                                '/'.$ENV{'request.course.sec'});
                    299:   }
                    300:   $Apache::lonhomework::viewgrades = $viewgrades;
1.52      albertel  301:   return ''
1.41      albertel  302: }
                    303: 
                    304: sub setupheader {
1.120     albertel  305:     my $request=$_[0];
                    306:     if ($ENV{'browser.mathml'}) {
                    307: 	$request->content_type('text/xml');
                    308:     } else {
                    309: 	$request->content_type('text/html');
                    310:     }
                    311:     $request->content_encoding('UTF-8');
                    312:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    313: 	&Apache::loncommon::no_cache($request);
                    314:     }
                    315:     $request->send_http_header;
                    316:     return OK if $request->header_only;
                    317:     return ''
1.41      albertel  318: }
1.35      albertel  319: 
1.47      albertel  320: sub handle_save_or_undo {
1.52      albertel  321:   my ($request,$problem,$result) = @_;
1.70      albertel  322:   my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    323:   my $filebak =$file.".bak";
                    324:   my $filetmp =$file.".tmp";
1.64      albertel  325:   my $error=0;
1.52      albertel  326: 
                    327:   if ($ENV{'form.Undo'} eq 'undo') {
1.70      albertel  328:     my $error=0;
                    329:     if (!copy($file,$filetmp)) { $error=1; }
                    330:     if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    331:     if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    332:     if (!$error) {
                    333:       $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
1.52      albertel  334:     } else {
1.70      albertel  335:       $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
1.64      albertel  336:       $error=1;
1.52      albertel  337:     }
                    338:   } else {
1.70      albertel  339:     my $fs=Apache::File->new(">$filebak");
1.52      albertel  340:     if (defined($fs)) {
                    341:       print $fs $$problem;
1.70      albertel  342:       $request->print("<b>Making Backup to $filebak</b><br />");
1.52      albertel  343:     } else {
1.70      albertel  344:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
1.64      albertel  345:       $error=2;
1.52      albertel  346:     }
1.70      albertel  347:     my $fh=Apache::File->new(">$file");
1.52      albertel  348:     if (defined($fh)) {
                    349:       print $fh $$result;
1.70      albertel  350:       $request->print("<b>Saving Modifications to $file</b><br />");
1.47      albertel  351:     } else {
1.70      albertel  352:       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
1.64      albertel  353:       $error|=4;
1.47      albertel  354:     }
1.52      albertel  355:   }
1.64      albertel  356:   return $error;
                    357: }
                    358: 
1.101     albertel  359: sub analyze_header {
                    360:     my ($request) = @_;
1.109     albertel  361:     my $result.='<html>
                    362:             <head><title>Analyzing a problem</title></head>
                    363:             <body bgcolor="#FFFFFF">
1.101     albertel  364:             <form name="lonhomework" method="POST" action="'.
                    365: 	      $ENV{'request.uri'}.'">
                    366:             <input type="submit" name="problemmode" value="EditXML" />
                    367:             <input type="submit" name="problemmode" value="Edit" />
                    368:             <hr />
                    369:             <input type="submit" name="submit" value="View" />
                    370:             <hr />
                    371:             List of possible answers:
                    372:             </form>';
                    373:     $request->print($result);
                    374:     $request->rflush();
                    375: }
                    376: 
1.109     albertel  377: sub analyze_footer {
                    378:     my ($request) = @_;
                    379:     my $result='</body></html>';
                    380:     $request->print($result);
                    381:     $request->rflush();
                    382: }
                    383: 
1.74      albertel  384: sub analyze {
1.101     albertel  385:     my ($request,$file) = @_;
                    386:     &Apache::lonxml::debug("Analyze");
                    387:     my $result;
                    388:     my %overall;
                    389:     my %allparts;
                    390:     my $rndseed=$ENV{'form.rndseed'};
                    391:     &analyze_header($request);
1.114     albertel  392:     my %prog_state=
                    393: 	&Apache::lonhtmlcommon::Create_PrgWin($request,'Analyze Progress',
                    394: 					      'Getting Problem Variants',
                    395: 					      $ENV{'form.numtoanalyze'});
1.102     albertel  396:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  397: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
                    398: 						 'last problem');
1.101     albertel  399: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    400: 					   ('grade_target' => 'analyze'),
1.130     albertel  401: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  402: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    403: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  404: 	my @parts;
                    405: 	if (defined(@{ $analyze{'parts'} })) {
                    406: 	    @parts=@{ $analyze{'parts'} };
                    407: 	}
1.101     albertel  408: 	foreach my $part (@parts) {
                    409: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  410: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    411: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    412: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  413: 		push( @{ $overall{$part.'.answer'} },
                    414: 		      [@{ $analyze{$part.'.answer'} }]);
                    415: 	    }
                    416: 	}
                    417:     }
1.114     albertel  418:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
                    419: 					  'Analyzing Results');
1.134     albertel  420:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  421: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  422: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
                    423: 	    $request->print('<table><tr><td colspan="'.($num_cols+1).'">Part '.$part.'</td></tr>');
1.130     albertel  424: 	    my %frequency;
1.109     albertel  425: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  426: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  427: 	    }
1.132     albertel  428: 	    $request->print('<tr><td colspan="'.($num_cols).'">Answer</td><td>Frequency</td></tr>');
                    429: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    430: 		$request->print('<tr><td align="right">'.
                    431: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  432: 				'</td><td>('.$frequency{$answer}.
                    433: 				')</td></tr>');
1.109     albertel  434: 	    }
                    435: 	    $request->print('</table>');
                    436: 	} else {
                    437: 	    $request->print('<p>Part '.$part.
1.130     albertel  438: 			    ' is not analyzable at this time</p>');
1.101     albertel  439: 	}
                    440:     }
1.130     albertel  441:     if (scalar(keys(%allparts)) == 0 ) {
                    442: 	$request->print('<p>Found no analyzable parts in this problem,
                    443:                          currently only Numerical, Formula and String response
                    444:                          styles are supported.</p>');
                    445:     }
1.114     albertel  446:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  447:     &analyze_footer($request);
1.101     albertel  448:     &Apache::lonhomework::showhash(%overall);
                    449:     return $result;
1.74      albertel  450: }
                    451: 
1.64      albertel  452: sub editxmlmode {
                    453:   my ($request,$file) = @_;
                    454:   my $result;
                    455:   my $problem=&Apache::lonnet::getfile($file);
1.116     albertel  456:   if ($problem eq -1) {
1.64      albertel  457:     &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    458:     $problem='';
                    459:   }
                    460:   if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    461:     my $error=&handle_save_or_undo($request,\$problem,
                    462: 				   \$ENV{'form.editxmltext'});
                    463:     if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    464:   }
1.80      albertel  465:   &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    466:   if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
                    467:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    468:     $ENV{'form.problemmode'}='View';
                    469:     &renderpage($request,$file);
                    470:   } else {
                    471:     my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.136   ! bowersj2  472:     my $xml_help = Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
        !           473: 							  "Problem Editing Help");
1.80      albertel  474:     if ($cols > 80) { $cols = 80; }
1.89      albertel  475:     if ($cols < 70) { $cols = 70; }
                    476:     if ($rows < 20) { $rows = 20; }
1.80      albertel  477:     $result.='<html><body bgcolor="#FFFFFF">
1.64      albertel  478:             <form name="lonhomework" method="POST" action="'.
                    479: 	      $ENV{'request.uri'}.'">
                    480:             <input type="hidden" name="problemmode" value="EditXML" />
1.80      albertel  481:             <input type="submit" name="problemmode" value="Discard Edits and View" />
1.64      albertel  482:             <input type="submit" name="problemmode" value="Edit" />
                    483:             <hr />
                    484:             <input type="submit" name="submit" value="Submit Changes" />
1.80      albertel  485:             <input type="submit" name="submit" value="Submit Changes and View" />
1.64      albertel  486:             <input type="submit" name="Undo" value="undo" />
                    487:             <hr />
1.110     albertel  488:             ' . $xml_help . '
1.64      albertel  489:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.73      albertel  490: 	      &HTML::Entities::encode($problem).'</textarea>
1.64      albertel  491:             </form></body></html>';
1.80      albertel  492:     $request->print($result);
                    493:   }
1.64      albertel  494:   return '';
1.47      albertel  495: }
                    496: 
1.41      albertel  497: sub renderpage {
1.52      albertel  498:   my ($request,$file) = @_;
                    499: 
                    500:   my (@targets) = &get_target();
1.70      albertel  501:   &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.52      albertel  502:   foreach my $target (@targets) {
                    503:     #my $t0 = [&gettimeofday()];
                    504:     my $problem=&Apache::lonnet::getfile($file);
1.117     albertel  505:     if ($problem eq -1) {
1.52      albertel  506:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
                    507:       $problem='';
                    508:     }
                    509: 
                    510:     my %mystyle;
                    511:     my $result = '';
1.109     albertel  512:     if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1.85      albertel  513:     if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    514:     if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
1.52      albertel  515: 
1.70      albertel  516:     &Apache::lonxml::debug("Should be parsing now");
1.78      albertel  517:     $result = &Apache::lonxml::xmlparse($request, $target, $problem,
1.98      albertel  518: 			&setup_vars($target),%mystyle);
1.113     albertel  519:     undef($Apache::lonhomework::parsing_a_problem);
1.52      albertel  520:     #$request->print("Result follows:");
                    521:     if ($target eq 'modified') {
                    522:       &handle_save_or_undo($request,\$problem,\$result);
                    523:     } else {
1.74      albertel  524:       if ($target eq 'analyze') {
                    525: 	$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1.75      albertel  526: 	undef(%Apache::lonhomework::analyze);
1.74      albertel  527:       }
1.52      albertel  528:       #my $td=&tv_interval($t0);
                    529:       #if ( $Apache::lonxml::debug) {
                    530: 	#$result =~ s:</body>::;
                    531: 	#$result.="<br />Spent $td seconds processing target $target\n</body>";
                    532:       #}
                    533:       $request->print($result);
1.112     albertel  534:       $request->rflush();
1.52      albertel  535:     }
                    536:     #$request->print(":Result ends");
                    537:     #my $td=&tv_interval($t0);
                    538:   }
1.41      albertel  539: }
                    540: 
1.42      albertel  541: # with no arg it returns a HTML <option> list of the template titles
                    542: # with one arg it returns the filename associated with the arg passed
                    543: sub get_template_list {
1.52      albertel  544:   my ($namewanted,$extension) = @_;
                    545:   my $result;
1.85      albertel  546:   my @allnames;
1.52      albertel  547:   &Apache::lonxml::debug("Looking for :$extension:");
1.91      albertel  548:   foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1.52      albertel  549:     my $name=&Apache::lonnet::metadata($file,'title');
                    550:     if ($namewanted && ($name eq $namewanted)) {
                    551:       $result=$file;
                    552:       last;
                    553:     } else {
1.104     www       554: 	if ($name) { push (@allnames, $name); }
1.42      albertel  555:     }
1.52      albertel  556:   }
1.86      albertel  557:   if (@allnames && !$result) {
1.115     www       558:     $result="<option>Select a $extension template</option>\n<option>".
1.128     albertel  559: 	join('</option><option>',sort(@allnames)).'</option>';
1.85      albertel  560:   }
1.52      albertel  561:   return $result;
1.42      albertel  562: }
                    563: 
                    564: sub newproblem {
1.65      matthew   565:     my ($request) = @_;
                    566:     my $extension=$request->uri;
                    567:     $extension=~s:^.*\.([\w]+)$:$1:;
                    568:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  569:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  570:     if ($ENV{'form.template'} &&
1.128     albertel  571: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   572: 	use File::Copy;
                    573: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    574: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    575: 	copy($file,$dest);
                    576: 	&renderpage($request,$dest);
1.131     albertel  577:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    578: 	# I don't like hard-coded filenames but for now, this will work.
                    579: 	use File::Copy;
                    580: 	my $templatefilename =
                    581: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    582: 	&Apache::lonxml::debug("$templatefilename");
                    583: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    584: 	copy($templatefilename,$dest);
                    585: 	&renderpage($request,$dest);
1.85      albertel  586:     } else {
1.65      matthew   587: 	my $url=$request->uri;
                    588: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  589: 	my $errormsg;
                    590: 	if ($ENV{'form.newfile'}) {
                    591: 	    $errormsg='<p><font color="red">You did not select a template.</font></p>'."\n";
                    592: 	}
1.85      albertel  593: 	my $instructions;
1.105     www       594: 	if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}
1.65      matthew   595: 	$request->print(<<ENDNEWPROBLEM);
1.42      albertel  596: <body bgcolor="#FFFFFF">
1.105     www       597: <h1>Creating a new $extension resource</h1>
1.128     albertel  598: $errormsg
1.105     www       599: The requested file <tt>$url</tt> currently does not exist.
                    600: <p>
1.128     albertel  601: <b>To create a new $extension$instructions click on the "Create $extension" button.</b>
1.105     www       602: </p>
                    603: <p><form action="$url" method="POST">
1.42      albertel  604: ENDNEWPROBLEM
1.85      albertel  605: 	if (defined($templatelist)) {
                    606: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    607: 	}
                    608: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
1.105     www       609: 	$request->print("</form></p></body>");
1.65      matthew   610:     }
                    611:     return '';
1.42      albertel  612: }
                    613: 
                    614: sub view_or_edit_menu {
1.52      albertel  615:   my ($request) = @_;
                    616:   my $url=$request->uri;
                    617:   $request->print(<<EDITMENU);
1.42      albertel  618: <body bgcolor="#FFFFFF">
                    619: <form action="$url" method="POST">
                    620: Would you like to <input type="submit" name="problemmode" value="View"> or
                    621: <input type="submit" name="problemmode" value="Edit"> the problem.
                    622: </form>
                    623: </body>
                    624: EDITMENU
                    625: }
                    626: 
1.41      albertel  627: sub handler {
1.52      albertel  628:   #my $t0 = [&gettimeofday()];
                    629:   my $request=$_[0];
1.41      albertel  630: 
1.95      albertel  631:   $Apache::lonxml::debug=$ENV{'user.debug'};
1.41      albertel  632: 
                    633:   if (&setupheader($request)) { return OK; }
1.52      albertel  634:   $ENV{'request.uri'}=$request->uri;
1.41      albertel  635: 
                    636:   #setup permissions
1.52      albertel  637:   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    638:   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    639:   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.71      albertel  640:   # some times multiple problemmodes are submitted, need to select
                    641:   # the last one
1.80      albertel  642:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.72      albertel  643:   if ( defined($ENV{'form.problemmode'}) &&
1.77      albertel  644:        ref($ENV{'form.problemmode'}) ) {
1.80      albertel  645:     &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
1.72      albertel  646:     my $mode=$ENV{'form.problemmode'}->[-1];
1.71      albertel  647:     undef $ENV{'form.problemmode'};
1.72      albertel  648:     $ENV{'form.problemmode'}=$mode;
1.71      albertel  649:   }
1.64      albertel  650:   &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
1.52      albertel  651:   my $file=&Apache::lonnet::filelocation("",$request->uri);
                    652: 
                    653:   #check if we know where we are
                    654:   if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    655:     # if we are browsing we might not be able to know where we are
                    656:     if ($Apache::lonhomework::browse ne 'F') {
                    657:       #should know where we are, so ask
                    658:       $request->internal_redirect('/adm/ambiguous'); return;
1.41      albertel  659:     }
1.52      albertel  660:   }
1.41      albertel  661: 
1.118     albertel  662:   my ($symb) = &Apache::lonxml::whichuser();
                    663:   &Apache::lonxml::debug('symb is '.$symb);
                    664:   if ($ENV{'request.state'} eq "construct" || $symb eq '') {
                    665:       if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||
                    666: 	  $ENV{'form.resetdata'} eq 'New Problem Variation' ) {
                    667: 	  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    668: 	  &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    669:       }
                    670:   }
1.52      albertel  671:   if ($ENV{'request.state'} eq "construct") {
                    672:     if ( -e $file ) {
1.135     www       673:       &Apache::loncommon::get_unprocessed_cgi
                    674:                           ($ENV{'QUERY_STRING'},['problemmode']);
1.52      albertel  675:       if (!(defined $ENV{'form.problemmode'})) {
                    676: 	#first visit to problem in construction space
1.64      albertel  677: 	#&view_or_edit_menu($request);
                    678: 	$ENV{'form.problemmode'}='View';
                    679: 	&renderpage($request,$file);
                    680:       } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
                    681: 	&editxmlmode($request,$file);
1.130     albertel  682:       } elsif ($ENV{'form.problemmode'} eq 'Calculate answers') {
1.74      albertel  683: 	&analyze($request,$file);
1.52      albertel  684:       } else {
                    685: 	&renderpage($request,$file);
1.41      albertel  686:       }
                    687:     } else {
1.52      albertel  688:       # requested file doesn't exist in contruction space
                    689:       &newproblem($request);
1.41      albertel  690:     }
1.52      albertel  691:   } else {
                    692:     # just render the page normally outside of construction space
1.74      albertel  693:     &Apache::lonxml::debug("not construct");
1.52      albertel  694:     &renderpage($request,$file);
                    695:   }
                    696:   #my $td=&tv_interval($t0);
                    697:   #&Apache::lonxml::debug("Spent $td seconds processing");
                    698:   # &Apache::lonhomework::send_footer($request);
                    699:   # always turn off debug messages
                    700:   $Apache::lonxml::debug=0;
                    701:   return OK;
                    702: 
1.1       albertel  703: }
                    704: 
                    705: 1;
                    706: __END__

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