1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.119 2003/04/03 21:46:27 albertel Exp $
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: #
28: # Guy Albertelli
29: # 11/30 Gerd Kortemeyer
30: # 6/1,8/17,8/18 Gerd Kortemeyer
31: # 7/18 Jeremy Bowers
32:
33: package Apache::lonhomework;
34: use strict;
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();
45: use Apache::caparesponse();
46: use Apache::radiobuttonresponse();
47: use Apache::optionresponse();
48: use Apache::imageresponse();
49: use Apache::essayresponse();
50: use Apache::externalresponse();
51: use Apache::rankresponse();
52: use Apache::matchresponse();
53: use Apache::Constants qw(:common);
54: use HTML::Entities();
55: use Apache::loncommon();
56: #use Time::HiRes qw( gettimeofday tv_interval );
57:
58: BEGIN {
59: &Apache::lonxml::register_insert();
60: }
61:
62: sub get_target {
63: if ( $ENV{'request.state'} eq "published") {
64: if ( defined($ENV{'form.grade_target'} )
65: && ($ENV{'form.grade_target'} eq 'tex')) {
66: return ($ENV{'form.grade_target'});
67: } elsif ( defined($ENV{'form.grade_target'} )
68: && ($Apache::lonhomework::viewgrades eq 'F' )) {
69: return ($ENV{'form.grade_target'});
70: }
71:
72: if ( defined($ENV{'form.submitted'}) &&
73: ( !defined($ENV{'form.resetdata'}))) {
74: return ('grade', 'web');
75: } else {
76: return ('web');
77: }
78: } elsif ($ENV{'request.state'} eq "construct") {
79: if ( defined($ENV{'form.grade_target'}) ) {
80: return ($ENV{'form.grade_target'});
81: }
82: if ( defined($ENV{'form.preview'})) {
83: if ( defined($ENV{'form.submitted'})) {
84: return ('grade', 'web');
85: } else {
86: return ('web');
87: }
88: } else {
89: if ( $ENV{'form.problemmode'} eq 'View' ||
90: $ENV{'form.problemmode'} eq 'Discard Edits and View') {
91: if ( defined($ENV{'form.submitted'}) &&
92: (!defined($ENV{'form.resetdata'})) ) {
93: return ('grade', 'web','answer');
94: } else {
95: return ('web','answer');
96: }
97: } elsif ( $ENV{'form.problemmode'} eq 'Edit' ) {
98: if ( $ENV{'form.submitted'} eq 'edit' ) {
99: if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
100: return ('modified','web','answer');
101: } else {
102: return ('modified','edit');
103: }
104: } else {
105: return ('edit');
106: }
107: } else {
108: return ('web');
109: }
110: }
111: }
112: return ();
113: }
114:
115: sub setup_vars {
116: my ($target) = @_;
117: return ';'
118: # return ';$external::target='.$target.';';
119: }
120:
121: sub send_header {
122: my ($request)= @_;
123: $request->print(&Apache::lontexconvert::header());
124: # $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
125: }
126:
127: sub createmenu {
128: my ($which,$request)=@_;
129: if ($which eq 'grade') {
130: $request->print('<script language="JavaScript">
131: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
132: "height=350,width=150,menubar=no");
133: </script>');
134: }
135: }
136:
137: sub send_footer {
138: my ($request)= @_;
139: # $request->print('</form>');
140: $request->print(&Apache::lontexconvert::footer());
141: }
142:
143: $Apache::lonxml::browse='';
144:
145: # JB, 9/24/2002: Any changes in this function may require a change
146: # in lonnavmaps::resource::getDateStatus.
147: sub check_access {
148: my ($id) = @_;
149: my $date ='';
150: my $status;
151: my $datemsg = '';
152: my $lastdate = '';
153: my $temp;
154: my $type;
155: my $passed;
156:
157: if ($ENV{'request.state'} eq "construct") {
158: &Apache::lonxml::debug("in construction ignoring dates");
159: $status='CAN_ANSWER';
160: $datemsg='is in under construction';
161: return ($status,$datemsg);
162: }
163:
164: &Apache::lonxml::debug("checking for part :$id:");
165: &Apache::lonxml::debug("time:".time);
166: foreach $temp ("opendate","duedate","answerdate") {
167: $lastdate = $date;
168: $date = &Apache::lonnet::EXT("resource.$id.$temp");
169: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
170: if ($thistype =~ /^(con_lost|no_such_host)/ ||
171: $date =~ /^(con_lost|no_such_host)/) {
172: $status='UNAVAILABLE';
173: $date="may open later.";
174: return($status,$date);
175: }
176: if ($thistype eq 'date_interval') {
177: if ($temp eq 'opendate') {
178: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
179: }
180: if ($temp eq 'answerdate') {
181: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
182: }
183: }
184: &Apache::lonxml::debug("found :$date: for :$temp:");
185: if ($date eq '') {
186: $date = "an unknown date"; $passed = 0;
187: } elsif ($date eq 'con_lost') {
188: $date = "an indeterminate date"; $passed = 0;
189: } else {
190: if (time < $date) { $passed = 0; } else { $passed = 1; }
191: $date = localtime $date;
192: }
193: if (!$passed) { $type=$temp; last; }
194: }
195: &Apache::lonxml::debug("have :$type:$passed:");
196: if ($passed) {
197: $status='SHOW_ANSWER';
198: $datemsg=$date;
199: } elsif ($type eq 'opendate') {
200: $status='CLOSED';
201: $datemsg = "will open on $date";
202: } elsif ($type eq 'duedate') {
203: $status='CAN_ANSWER';
204: $datemsg = "is due at $date";
205: } elsif ($type eq 'answerdate') {
206: $status='CLOSED';
207: $datemsg = "was due on $lastdate, and answers will be available on $date";
208: }
209: if ($status eq 'CAN_ANSWER') {
210: #check #tries
211: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
212: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
213: if ( $tries eq '' ) { $tries = '0'; }
214: if ( $maxtries eq '' ) { $maxtries = '2'; }
215: if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
216: }
217:
218: if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
219: (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
220: return ('UNCHECKEDOUT','needs to be checked out');
221: }
222:
223:
224: &Apache::lonxml::debug("sending back :$status:$datemsg:");
225: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
226: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
227: $status='CAN_ANSWER';
228: $datemsg='is closed but you are allowed to view it';
229: }
230:
231: return ($status,$datemsg);
232: }
233:
234: sub showhash {
235: my (%hash) = @_;
236: &showhashsubset(\%hash,'.');
237: return '';
238: }
239:
240: sub showarray {
241: my ($array)=@_;
242: my $string="(";
243: foreach my $elm (@{ $array }) {
244: if (ref($elm)) {
245: if ($elm =~ /ARRAY/ ) {
246: $string.=&showarray($elm);
247: }
248: } else {
249: $string.="$elm,"
250: }
251: }
252: chop($string);
253: $string.=")";
254: return $string;
255: }
256:
257: sub showhashsubset {
258: my ($hash,$keyre) = @_;
259: my $resultkey;
260: foreach $resultkey (sort keys %$hash) {
261: if ($resultkey =~ /$keyre/) {
262: if (ref($$hash{$resultkey})) {
263: if ($$hash{$resultkey} =~ /ARRAY/ ) {
264: &Apache::lonxml::debug("$resultkey ---- ".
265: &showarray($$hash{$resultkey}));
266: } elsif ($$hash{$resultkey} =~ /HASH/ ) {
267: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
268: &showhashsubset($$hash{$resultkey},'.');
269: } else {
270: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
271: }
272: } else {
273: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
274: }
275: }
276: }
277: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
278: return '';
279: }
280:
281: sub setuppermissions {
282: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
283: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
284: return ''
285: }
286:
287: sub setupheader {
288: my $request=$_[0];
289: if ($ENV{'browser.mathml'}) {
290: $request->content_type('text/xml');
291: } else {
292: $request->content_type('text/html');
293: }
294: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
295: &Apache::loncommon::no_cache($request);
296: }
297: $request->send_http_header;
298: return OK if $request->header_only;
299: return ''
300: }
301:
302: sub handle_save_or_undo {
303: my ($request,$problem,$result) = @_;
304: my $file = &Apache::lonnet::filelocation("",$request->uri);
305: my $filebak =$file.".bak";
306: my $filetmp =$file.".tmp";
307: my $error=0;
308:
309: if ($ENV{'form.Undo'} eq 'undo') {
310: my $error=0;
311: if (!copy($file,$filetmp)) { $error=1; }
312: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
313: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
314: if (!$error) {
315: $request->print("<p><b>Undid changes, Switched $filebak and $file</b></p>");
316: } else {
317: $request->print("<p><font color=\"red\" size=\"+1\"><b>Unable to undo, unable to switch $filebak and $file</b></font></p>");
318: $error=1;
319: }
320: } else {
321: my $fs=Apache::File->new(">$filebak");
322: if (defined($fs)) {
323: print $fs $$problem;
324: $request->print("<b>Making Backup to $filebak</b><br />");
325: } else {
326: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filebak</b></font>");
327: $error=2;
328: }
329: my $fh=Apache::File->new(">$file");
330: if (defined($fh)) {
331: print $fh $$result;
332: $request->print("<b>Saving Modifications to $file</b><br />");
333: } else {
334: $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $file</b></font>");
335: $error|=4;
336: }
337: }
338: return $error;
339: }
340:
341: sub analyze_header {
342: my ($request) = @_;
343: my $result.='<html>
344: <head><title>Analyzing a problem</title></head>
345: <body bgcolor="#FFFFFF">
346: <form name="lonhomework" method="POST" action="'.
347: $ENV{'request.uri'}.'">
348: <input type="submit" name="problemmode" value="EditXML" />
349: <input type="submit" name="problemmode" value="Edit" />
350: <hr />
351: <input type="submit" name="submit" value="View" />
352: <hr />
353: List of possible answers:
354: </form>';
355: $request->print($result);
356: $request->rflush();
357: }
358:
359: sub analyze_footer {
360: my ($request) = @_;
361: my $result='</body></html>';
362: $request->print($result);
363: $request->rflush();
364: }
365:
366: sub analyze {
367: my ($request,$file) = @_;
368: &Apache::lonxml::debug("Analyze");
369: my $result;
370: my %overall;
371: my %allparts;
372: my $rndseed=$ENV{'form.rndseed'};
373: &analyze_header($request);
374: my %prog_state=
375: &Apache::lonhtmlcommon::Create_PrgWin($request,'Analyze Progress',
376: 'Getting Problem Variants',
377: $ENV{'form.numtoanalyze'});
378: for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
379: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
380: 'last problem');
381: my $subresult=&Apache::lonnet::ssi($request->uri,
382: ('grade_target' => 'analyze'),
383: ('rndseed' => $i));
384: &Apache::lonxml::debug(":$subresult:");
385: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
386: my %analyze=&Apache::lonnet::str2hash($subresult);
387: my @parts;
388: if (defined(@{ $analyze{'parts'} })) {
389: @parts=@{ $analyze{'parts'} };
390: }
391: foreach my $part (@parts) {
392: if (!exists($allparts{$part})) {$allparts{$part}=1;};
393: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
394: $analyze{$part.'.type'} eq 'stringresponse' ||
395: $analyze{$part.'.type'} eq 'formularesponse' ) {
396: push( @{ $overall{$part.'.answer'} },
397: [@{ $analyze{$part.'.answer'} }]);
398: }
399: }
400: }
401: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
402: 'Analyzing Results');
403: foreach my $part (keys(%allparts)) {
404: if (defined(@{ $overall{$part.'.answer'} })) {
405: $request->print('<table><tr><td>Part '.$part.'</td></tr>');
406: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
407: $request->print('<tr><td>'.join('</td><td>',@{ $answer }).
408: '</td></tr>');
409: }
410: $request->print('</table>');
411: } else {
412: $request->print('<p>Part '.$part.
413: ' is not analyzabale at this time</p>');
414: }
415: }
416: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
417: &analyze_footer($request);
418: &Apache::lonhomework::showhash(%overall);
419: return $result;
420: }
421:
422: sub editxmlmode {
423: my ($request,$file) = @_;
424: my $result;
425: my $problem=&Apache::lonnet::getfile($file);
426: if ($problem eq -1) {
427: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
428: $problem='';
429: }
430: if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
431: my $error=&handle_save_or_undo($request,\$problem,
432: \$ENV{'form.editxmltext'});
433: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
434: }
435: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
436: if ( $ENV{'form.submit'} eq 'Submit Changes and View' ) {
437: &Apache::lonhomework::showhashsubset(\%ENV,'^form');
438: $ENV{'form.problemmode'}='View';
439: &renderpage($request,$file);
440: } else {
441: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
442: my $xml_help = '<table><tr><td>'.
443: &Apache::loncommon::help_open_topic("Problem_Editor_XML_Index",'Problem Editing Help')
444: .'</td><td>'.
445: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
446: undef,undef,600)
447: .'</td><td>'.
448: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
449: undef,undef,600)
450: .'</td></tr></table>';
451: if ($cols > 80) { $cols = 80; }
452: if ($cols < 70) { $cols = 70; }
453: if ($rows < 20) { $rows = 20; }
454: $result.='<html><body bgcolor="#FFFFFF">
455: <form name="lonhomework" method="POST" action="'.
456: $ENV{'request.uri'}.'">
457: <input type="hidden" name="problemmode" value="EditXML" />
458: <input type="submit" name="problemmode" value="Discard Edits and View" />
459: <input type="submit" name="problemmode" value="Edit" />
460: <hr />
461: <input type="submit" name="submit" value="Submit Changes" />
462: <input type="submit" name="submit" value="Submit Changes and View" />
463: <input type="submit" name="Undo" value="undo" />
464: <hr />
465: ' . $xml_help . '
466: <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
467: &HTML::Entities::encode($problem).'</textarea>
468: </form></body></html>';
469: $request->print($result);
470: }
471: return '';
472: }
473:
474: sub renderpage {
475: my ($request,$file) = @_;
476:
477: my (@targets) = &get_target();
478: &Apache::lonxml::debug("Running targets ".join(':',@targets));
479: foreach my $target (@targets) {
480: #my $t0 = [&gettimeofday()];
481: my $problem=&Apache::lonnet::getfile($file);
482: if ($problem eq -1) {
483: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
484: $problem='';
485: }
486:
487: my %mystyle;
488: my $result = '';
489: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
490: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
491: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
492:
493: &Apache::lonxml::debug("Should be parsing now");
494: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
495: &setup_vars($target),%mystyle);
496: undef($Apache::lonhomework::parsing_a_problem);
497: #$request->print("Result follows:");
498: if ($target eq 'modified') {
499: &handle_save_or_undo($request,\$problem,\$result);
500: } else {
501: if ($target eq 'analyze') {
502: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
503: undef(%Apache::lonhomework::analyze);
504: }
505: #my $td=&tv_interval($t0);
506: #if ( $Apache::lonxml::debug) {
507: #$result =~ s:</body>::;
508: #$result.="<br />Spent $td seconds processing target $target\n</body>";
509: #}
510: $request->print($result);
511: $request->rflush();
512: }
513: #$request->print(":Result ends");
514: #my $td=&tv_interval($t0);
515: }
516: }
517:
518: # with no arg it returns a HTML <option> list of the template titles
519: # with one arg it returns the filename associated with the arg passed
520: sub get_template_list {
521: my ($namewanted,$extension) = @_;
522: my $result;
523: my @allnames;
524: &Apache::lonxml::debug("Looking for :$extension:");
525: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
526: my $name=&Apache::lonnet::metadata($file,'title');
527: if ($namewanted && ($name eq $namewanted)) {
528: $result=$file;
529: last;
530: } else {
531: if ($name) { push (@allnames, $name); }
532: }
533: }
534: if (@allnames && !$result) {
535: $result="<option>Select a $extension template</option>\n<option>".
536: join('</option><option>',sort(@allnames)).'</option>';
537: }
538: return $result;
539: }
540:
541: sub newproblem {
542: my ($request) = @_;
543: my $extension=$request->uri;
544: $extension=~s:^.*\.([\w]+)$:$1:;
545: &Apache::lonxml::debug("Looking for :$extension:");
546: if ($ENV{'form.template'} &&
547: $ENV{'form.template'} ne "Select a $extension type") {
548: use File::Copy;
549: my $file = &get_template_list($ENV{'form.template'},$extension);
550: my $dest = &Apache::lonnet::filelocation("",$request->uri);
551: copy($file,$dest);
552: &renderpage($request,$dest);
553: } elsif($ENV{'form.newfile'}) {
554: # I don't like hard-coded filenames but for now, this will work.
555: use File::Copy;
556: my $templatefilename =
557: $request->dir_config('lonIncludes').'/templates/blank.problem';
558: &Apache::lonxml::debug("$templatefilename");
559: my $dest = &Apache::lonnet::filelocation("",$request->uri);
560: copy($templatefilename,$dest);
561: &renderpage($request,$dest);
562: } else {
563: my $templatelist=&get_template_list('',$extension);
564: my $url=$request->uri;
565: my $dest = &Apache::lonnet::filelocation("",$request->uri);
566: my $instructions;
567: if ($templatelist) { $instructions=", select a template from the pull-down menu below.<br />Then";}
568: $request->print(<<ENDNEWPROBLEM);
569: <body bgcolor="#FFFFFF">
570: <h1>Creating a new $extension resource</h1>
571: The requested file <tt>$url</tt> currently does not exist.
572: <p>
573: To create a new $extension$instructions click on the "Create $extension" button.
574: </p>
575: <p><form action="$url" method="POST">
576: ENDNEWPROBLEM
577: if (defined($templatelist)) {
578: $request->print("<select name=\"template\">$templatelist</select>");
579: }
580: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"Create $extension\" />");
581: $request->print("</form></p></body>");
582: }
583: return '';
584: }
585:
586: sub view_or_edit_menu {
587: my ($request) = @_;
588: my $url=$request->uri;
589: $request->print(<<EDITMENU);
590: <body bgcolor="#FFFFFF">
591: <form action="$url" method="POST">
592: Would you like to <input type="submit" name="problemmode" value="View"> or
593: <input type="submit" name="problemmode" value="Edit"> the problem.
594: </form>
595: </body>
596: EDITMENU
597: }
598:
599: sub handler {
600: #my $t0 = [&gettimeofday()];
601: my $request=$_[0];
602:
603: $Apache::lonxml::debug=$ENV{'user.debug'};
604:
605: if (&setupheader($request)) { return OK; }
606: $ENV{'request.uri'}=$request->uri;
607:
608: #setup permissions
609: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
610: $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
611: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
612: # some times multiple problemmodes are submitted, need to select
613: # the last one
614: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
615: if ( defined($ENV{'form.problemmode'}) &&
616: ref($ENV{'form.problemmode'}) ) {
617: &Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
618: my $mode=$ENV{'form.problemmode'}->[-1];
619: undef $ENV{'form.problemmode'};
620: $ENV{'form.problemmode'}=$mode;
621: }
622: &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
623: my $file=&Apache::lonnet::filelocation("",$request->uri);
624:
625: #check if we know where we are
626: if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) {
627: # if we are browsing we might not be able to know where we are
628: if ($Apache::lonhomework::browse ne 'F') {
629: #should know where we are, so ask
630: $request->internal_redirect('/adm/ambiguous'); return;
631: }
632: }
633:
634: my ($symb) = &Apache::lonxml::whichuser();
635: &Apache::lonxml::debug('symb is '.$symb);
636: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
637: if ($ENV{'form.resetdata'} eq 'Reset Submissions' ||
638: $ENV{'form.resetdata'} eq 'New Problem Variation' ) {
639: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
640: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
641: }
642: }
643: if ($ENV{'request.state'} eq "construct") {
644: if ( -e $file ) {
645: if (!(defined $ENV{'form.problemmode'})) {
646: #first visit to problem in construction space
647: #&view_or_edit_menu($request);
648: $ENV{'form.problemmode'}='View';
649: &renderpage($request,$file);
650: } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
651: &editxmlmode($request,$file);
652: } elsif ($ENV{'form.problemmode'} eq 'Answer Distribution') {
653: &analyze($request,$file);
654: } else {
655: &renderpage($request,$file);
656: }
657: } else {
658: # requested file doesn't exist in contruction space
659: &newproblem($request);
660: }
661: } else {
662: # just render the page normally outside of construction space
663: &Apache::lonxml::debug("not construct");
664: &renderpage($request,$file);
665: }
666: #my $td=&tv_interval($t0);
667: #&Apache::lonxml::debug("Spent $td seconds processing");
668: # &Apache::lonhomework::send_footer($request);
669: # always turn off debug messages
670: $Apache::lonxml::debug=0;
671: return OK;
672:
673: }
674:
675: 1;
676: __END__
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