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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