1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.322 2010/11/01 16:19:49 raeburn 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:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::functionplotresponse();
51: use Apache::drawimage();
52: use Apache::Constants qw(:common);
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use HTML::Entities();
57: use File::Copy();
58:
59: # FIXME - improve commenting
60:
61:
62: BEGIN {
63: &Apache::lonxml::register_insert();
64: }
65:
66:
67: =pod
68:
69: =item set_bubble_lines()
70:
71: Called at analysis time to set the bubble lines
72: hash for the problem.. This should be called in the
73: end_problemtype tag in analysis mode.
74:
75: We fetch the hash of part id counters from lonxml
76: and push them into analyze:{part_id.bubble_lines}.
77:
78: =cut
79:
80: sub set_bubble_lines {
81: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
82:
83: foreach my $key (keys(%bubble_counters)) {
84: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
85: $bubble_counters{"$key"};
86: }
87: }
88:
89: #
90: # Decides what targets to render for.
91: # Implicit inputs:
92: # Various session environment variables:
93: # request.state - published - is a /res/ resource
94: # uploaded - is a /uploaded/ resource
95: # contruct - is a /priv/ resource
96: # form.grade_target - a form parameter requesting a specific target
97: sub get_target {
98: &Apache::lonxml::debug("request.state = $env{'request.state'}");
99: if( defined($env{'form.grade_target'})) {
100: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
101: } else {
102: &Apache::lonxml::debug("form.grade_target <undefined>");
103: }
104: if (($env{'request.state'} eq "published") ||
105: ($env{'request.state'} eq "uploaded")) {
106: if ( defined($env{'form.grade_target'} )
107: && ($env{'form.grade_target'} eq 'tex')) {
108: return ($env{'form.grade_target'});
109: } elsif ( defined($env{'form.grade_target'} )
110: && ($Apache::lonhomework::viewgrades eq 'F' )) {
111: return ($env{'form.grade_target'});
112: } elsif ( $env{'form.grade_target'} eq 'webgrade'
113: && ($Apache::lonhomework::queuegrade eq 'F' )) {
114: return ($env{'form.grade_target'});
115: } elsif ($env{'form.grade_target'} eq 'answer') {
116: if ($env{'form.answer_output_mode'} eq 'tex') {
117: return ($env{'form.grade_target'});
118: }
119: }
120: if ($env{'form.webgrade'} &&
121: ($Apache::lonhomework::modifygrades eq 'F'
122: || $Apache::lonhomework::queuegrade eq 'F' )) {
123: return ('grade','webgrade');
124: }
125: if ( defined($env{'form.submitted'}) &&
126: ( !defined($env{'form.newrandomization'}))) {
127: return ('grade', 'web');
128: } else {
129: return ('web');
130: }
131: } elsif ($env{'request.state'} eq "construct") {
132: if ( defined($env{'form.grade_target'}) ) {
133: return ($env{'form.grade_target'});
134: }
135: if ( defined($env{'form.preview'})) {
136: if ( defined($env{'form.submitted'})) {
137: return ('grade', 'web');
138: } else {
139: return ('web');
140: }
141: } else {
142: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
143: #$env{'form.webgrade'} = 'yes';
144: return ('grade','webgrade','answer');
145: } elsif (($env{'form.problemmode'} eq 'view') ||
146: ($env{'form.problemmode'} eq 'discard')) {
147: if ( defined($env{'form.submitted'}) &&
148: (!defined($env{'form.resetdata'})) &&
149: (!defined($env{'form.newrandomization'}))) {
150: return ('grade', 'web','answer');
151: } else {
152: return ('web','answer');
153: }
154: } elsif ($env{'form.problemmode'} eq 'edit') {
155: if ( $env{'form.submitted'} eq 'edit' ) {
156: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
157: return ('modified','web','answer');
158: } else {
159: return ('modified','no_output_web','edit');
160: }
161: } else {
162: return ('no_output_web','edit');
163: }
164: } else {
165: return ('web');
166: }
167: }
168: }
169: return ();
170: }
171:
172: sub setup_vars {
173: my ($target) = @_;
174: return ';'
175: # return ';$external::target='.$target.';';
176: }
177:
178: sub proctor_checked_in {
179: my ($slot_name,$slot,$type)=@_;
180: my @possible_proctors=split(",",$slot->{'proctor'});
181:
182: return 1 if (!@possible_proctors);
183:
184: my $key;
185: if ($type eq 'Task') {
186: my $version=$Apache::lonhomework::history{'resource.0.version'};
187: $key ="resource.$version.0.checkedin";
188: } elsif ($type eq 'problem') {
189: $key ='resource.0.checkedin';
190: }
191: # backward compatability, used to be username@domain,
192: # now is username:domain
193: my $who = $Apache::lonhomework::history{$key};
194: if ($who !~ /:/) {
195: $who =~ tr/@/:/;
196: }
197: foreach my $possible (@possible_proctors) {
198: if ($who eq $possible
199: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
200: return 1;
201: }
202: }
203:
204: return 0;
205: }
206:
207: sub check_slot_access {
208: my ($id,$type)=@_;
209:
210: # does it pass normal muster
211: my ($status,$datemsg)=&check_access($id);
212:
213: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
214: if ($useslots ne 'resource' && $useslots ne 'map'
215: && $useslots ne 'map_map') {
216: return ($status,$datemsg);
217: }
218:
219: if ($status eq 'SHOW_ANSWER' ||
220: $status eq 'CLOSED' ||
221: $status eq 'INVALID_ACCESS' ||
222: $status eq 'UNAVAILABLE') {
223: return ($status,$datemsg);
224: }
225: if ($env{'request.state'} eq "construct") {
226: return ($status,$datemsg);
227: }
228:
229: if ($type eq 'Task') {
230: my $version=$Apache::lonhomework::history{'resource.version'};
231: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
232: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
233: return ('SHOW_ANSWER');
234: }
235: }
236:
237: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
238: my $available = &Apache::lonnet::EXT("resource.0.available");
239: my @slots= (split(':',$availablestudent),split(':',$available));
240:
241: # if (!@slots) {
242: # return ($status,$datemsg);
243: # }
244: my $slotstatus='NOT_IN_A_SLOT';
245: my ($returned_slot,$slot_name);
246: foreach my $slot (@slots) {
247: $slot =~ s/(^\s*|\s*$)//g;
248: &Apache::lonxml::debug("getting $slot");
249: my %slot=&Apache::lonnet::get_slot($slot);
250: &Apache::lonhomework::showhash(%slot);
251: if ($slot{'starttime'} < time &&
252: $slot{'endtime'} > time &&
253: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
254: &Apache::lonxml::debug("$slot is good");
255: $slotstatus='NEEDS_CHECKIN';
256: $returned_slot=\%slot;
257: $slot_name=$slot;
258: last;
259: }
260: }
261: if ($slotstatus eq 'NEEDS_CHECKIN' &&
262: &proctor_checked_in($slot_name,$returned_slot,$type)) {
263: &Apache::lonxml::debug("proctor checked in");
264: $slotstatus=$status;
265: }
266:
267: my ($is_correct,$got_grade,$checkedin);
268: if ($type eq 'Task') {
269: my $version=$Apache::lonhomework::history{'resource.0.version'};
270: $got_grade =
271: ($Apache::lonhomework::history{"resource.$version.0.status"}
272: =~ /^(?:pass|fail)$/);
273: $is_correct =
274: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
275: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
276: $checkedin =
277: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
278: } elsif ($type eq 'problem') {
279: $got_grade = 1;
280: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
281: $is_correct =
282: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
283: }
284:
285: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
286:
287: # no slot is currently open, and has been checked in for this version
288: # but hasn't got a grade, therefore must be awaiting a grade
289: if (!defined($slot_name)
290: && $checkedin
291: && !$got_grade) {
292: return ('WAITING_FOR_GRADE');
293: }
294:
295: # Previously used slot is no longer open, and has been checked in for this version.
296: # However, the problem is not closed, and potentially, another slot might be
297: # used to gain access to it to work on it, until the due date is reached, and the
298: # problem then becomes CLOSED. Therefore return the slotstatus -
299: # (which will be NOT_IN_SLOT).
300: if (!defined($slot_name)
301: && $checkedin
302: && $type eq 'problem') {
303: return ($slotstatus);
304: }
305:
306: if ($slotstatus eq 'NOT_IN_A_SLOT'
307: && $checkedin ) {
308:
309: if ($got_grade) {
310: return ('SHOW_ANSWER');
311: } else {
312: return ('WAITING_FOR_GRADE');
313: }
314:
315: }
316:
317: if ( $is_correct) {
318: if ($type eq 'problem') {
319: return ($status);
320: }
321: return ('SHOW_ANSWER');
322: }
323:
324: if ( $status eq 'CANNOT_ANSWER' &&
325: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
326: return ($status,$datemsg);
327: }
328:
329: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
330: }
331:
332: # JB, 9/24/2002: Any changes in this function may require a change
333: # in lonnavmaps::resource::getDateStatus.
334: sub check_access {
335: my ($id) = @_;
336: my $date ='';
337: my $status;
338: my $datemsg = '';
339: my $lastdate = '';
340: my $type;
341: my $passed;
342:
343: if ($env{'request.state'} eq "construct") {
344: if ($env{'form.problemstate'}) {
345: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
346: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
347: && &hide_problem_status())) {
348: return ('CANNOT_ANSWER',
349: &mt('is in this state due to author settings.'));
350: }
351: } else {
352: return ($env{'form.problemstate'},
353: &mt('is in this state due to author settings.'));
354: }
355: }
356: &Apache::lonxml::debug("in construction ignoring dates");
357: $status='CAN_ANSWER';
358: $datemsg=&mt('is in under construction');
359: # return ($status,$datemsg);
360: }
361:
362: &Apache::lonxml::debug("checking for part :$id:");
363: &Apache::lonxml::debug("time:".time);
364:
365: my ($symb)=&Apache::lonnet::whichuser();
366: &Apache::lonxml::debug("symb:".$symb);
367: #if ($env{'request.state'} ne "construct" && $symb ne '') {
368: if ($env{'request.state'} ne "construct") {
369: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
370: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
371: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
372: $status='INVALID_ACCESS';
373: $date=&mt("can not be accessed from your location.");
374: return($status,$date);
375: }
376:
377: foreach my $temp ("opendate","duedate","answerdate") {
378: $lastdate = $date;
379: if ($temp eq 'duedate') {
380: $date = &due_date($id);
381: } else {
382: $date = &Apache::lonnet::EXT("resource.$id.$temp");
383: }
384:
385: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
386: if ($thistype =~ /^(con_lost|no_such_host)/ ||
387: $date =~ /^(con_lost|no_such_host)/) {
388: $status='UNAVAILABLE';
389: $date=&mt("may open later.");
390: return($status,$date);
391: }
392: if ($thistype eq 'date_interval') {
393: if ($temp eq 'opendate') {
394: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
395: }
396: if ($temp eq 'answerdate') {
397: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
398: }
399: }
400: &Apache::lonxml::debug("found :$date: for :$temp:");
401: if ($date eq '') {
402: $date = &mt("an unknown date"); $passed = 0;
403: } elsif ($date eq 'con_lost') {
404: $date = &mt("an indeterminate date"); $passed = 0;
405: } else {
406: if (time < $date) { $passed = 0; } else { $passed = 1; }
407: $date = &Apache::lonlocal::locallocaltime($date);
408: }
409: if (!$passed) { $type=$temp; last; }
410: }
411: &Apache::lonxml::debug("have :$type:$passed:");
412: if ($passed) {
413: $status='SHOW_ANSWER';
414: $datemsg=$date;
415: } elsif ($type eq 'opendate') {
416: $status='CLOSED';
417: $datemsg = &mt("will open on")." $date";
418: } elsif ($type eq 'duedate') {
419: $status='CAN_ANSWER';
420: $datemsg = &mt("is due at")." $date";
421: } elsif ($type eq 'answerdate') {
422: $status='CLOSED';
423: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
424: }
425: }
426: if ($status eq 'CAN_ANSWER' ||
427: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
428: #check #tries, and if correct.
429: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
430: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
431: if ( $tries eq '' ) { $tries = '0'; }
432: if ( $maxtries eq '' &&
433: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
434: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
435: # if (correct and show prob status) or excused then CANNOT_ANSWER
436: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
437: &&
438: &show_problem_status())
439: ||
440: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
441: $status = 'CANNOT_ANSWER';
442: }
443: if ($status eq 'CANNOT_ANSWER'
444: && &show_answer_problem_status()) {
445: $status = 'SHOW_ANSWER';
446: }
447: }
448: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
449: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
450: &Apache::lonxml::debug("looking for interval @interval");
451: if ($interval[0]) {
452: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
453: &Apache::lonxml::debug("looking for accesstime $first_access");
454: if (!$first_access) {
455: $status='NOT_YET_VIEWED';
456: my $due_date = &due_date($id);
457: my $seconds_left = $due_date - time;
458: if ($seconds_left > $interval[0] || $due_date eq '') {
459: $seconds_left = $interval[0];
460: }
461: $datemsg=&seconds_to_human_length($seconds_left);
462: }
463: }
464: }
465:
466: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
467: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
468: # return ('UNCHECKEDOUT','needs to be checked out');
469: #}
470:
471:
472: &Apache::lonxml::debug("sending back :$status:$datemsg:");
473: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
474: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
475: $status='CAN_ANSWER';
476: $datemsg=&mt('is closed but you are allowed to view it');
477: }
478:
479: return ($status,$datemsg);
480: }
481: # this should work exactly like the copy in lonnavmaps.pm
482: sub due_date {
483: my ($part_id,$symb,$udom,$uname)=@_;
484: my $date;
485: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
486: $udom,$uname);
487: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
488: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
489: $udom,$uname);
490: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
491: if ($interval[0] =~ /\d+/) {
492: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
493: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
494: if (defined($first_access)) {
495: my $interval = $first_access+$interval[0];
496: $date = (!$due_date || $interval < $due_date) ? $interval
497: : $due_date;
498: } else {
499: $date = $due_date;
500: }
501: } else {
502: $date = $due_date;
503: }
504: return $date
505: }
506:
507: sub seconds_to_human_length {
508: my ($length)=@_;
509:
510: my $seconds=$length%60; $length=int($length/60);
511: my $minutes=$length%60; $length=int($length/60);
512: my $hours=$length%24; $length=int($length/24);
513: my $days=$length;
514:
515: my $timestr;
516: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
517: if ($hours > 0) { $timestr.=($timestr?", ":"").
518: &mt('[quant,_1,hour]',$hours); }
519: if ($minutes > 0) { $timestr.=($timestr?", ":"").
520: &mt('[quant,_1,minute]',$minutes); }
521: if ($seconds > 0) { $timestr.=($timestr?", ":"").
522: &mt('[quant,_1,second]',$seconds); }
523: return $timestr;
524: }
525:
526: sub showhash {
527: my (%hash) = @_;
528: &showhashsubset(\%hash,'.');
529: return '';
530: }
531:
532: sub showarray {
533: my ($array)=@_;
534: my $string="(";
535: foreach my $elm (@{ $array }) {
536: if (ref($elm) eq 'ARRAY') {
537: $string.=&showarray($elm);
538: } elsif (ref($elm) eq 'HASH') {
539: $string.= "HASH --- \n<br />";
540: $string.= &showhashsubset($elm,'.');
541: } else {
542: $string.="$elm,"
543: }
544: }
545: chop($string);
546: $string.=")";
547: return $string;
548: }
549:
550: sub showhashsubset {
551: my ($hash,$keyre) = @_;
552: my $resultkey;
553: foreach $resultkey (sort keys %$hash) {
554: if ($resultkey !~ /$keyre/) { next; }
555: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
556: &Apache::lonxml::debug("$resultkey ---- ".
557: &showarray($$hash{$resultkey}));
558: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
559: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
560: &showhashsubset($$hash{$resultkey},'.');
561: } else {
562: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
563: }
564: }
565: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
566: return '';
567: }
568:
569: sub setuppermissions {
570: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
571: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
572: if (! $viewgrades &&
573: exists($env{'request.course.sec'}) &&
574: $env{'request.course.sec'} !~ /^\s*$/) {
575: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
576: '/'.$env{'request.course.sec'});
577: }
578: $Apache::lonhomework::viewgrades = $viewgrades;
579:
580: if ($Apache::lonhomework::browse eq 'F' &&
581: $env{'form.devalidatecourseresdata'} eq 'on') {
582: my (undef,$courseid) = &Apache::lonnet::whichuser();
583: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
584: $env{"course.$courseid.domain"});
585: }
586:
587: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
588: if (! $modifygrades &&
589: exists($env{'request.course.sec'}) &&
590: $env{'request.course.sec'} !~ /^\s*$/) {
591: $modifygrades =
592: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
593: '/'.$env{'request.course.sec'});
594: }
595: $Apache::lonhomework::modifygrades = $modifygrades;
596:
597: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
598: if (! $queuegrade &&
599: exists($env{'request.course.sec'}) &&
600: $env{'request.course.sec'} !~ /^\s*$/) {
601: $queuegrade =
602: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
603: '/'.$env{'request.course.sec'});
604: }
605: $Apache::lonhomework::queuegrade = $queuegrade;
606: return '';
607: }
608:
609: sub unset_permissions {
610: undef($Apache::lonhomework::queuegrade);
611: undef($Apache::lonhomework::modifygrades);
612: undef($Apache::lonhomework::viewgrades);
613: undef($Apache::lonhomework::browse);
614: }
615:
616: sub setupheader {
617: my $request=$_[0];
618: &Apache::loncommon::content_type($request,'text/html');
619: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
620: &Apache::loncommon::no_cache($request);
621: }
622: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
623: # 'lastrevisiondate'));
624: $request->send_http_header;
625: return OK if $request->header_only;
626: return ''
627: }
628:
629: sub handle_save_or_undo {
630: my ($request,$problem,$result) = @_;
631: my $file = &Apache::lonnet::filelocation("",$request->uri);
632: my $filebak =$file.".bak";
633: my $filetmp =$file.".tmp";
634: my $error=0;
635: if ($env{'form.Undo'} eq &mt('undo')) {
636: my $error=0;
637: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
638: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
639: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
640: if (!$error) {
641: &Apache::lonxml::info("<p><b>".
642: &mt("Undid changes, Switched [_1] and [_2]",
643: '<span class="LC_filename">'.$filebak.
644: '</span>',
645: '<span class="LC_filename">'.$file.
646: '</span>')."</b></p>");
647: } else {
648: &Apache::lonxml::info("<p><span class=\"LC_error\">".
649: &mt("Unable to undo, unable to switch [_1] and [_2]",
650: '<span class="LC_filename">'.
651: $filebak.'</span>',
652: '<span class="LC_filename">'.
653: $file.'</span>')."</span></p>");
654: $error=1;
655: }
656: } else {
657: &Apache::lonnet::correct_line_ends($result);
658: my $fs=Apache::File->new(">$filebak");
659: if (defined($fs)) {
660: print $fs $$problem;
661: } else {
662: &Apache::lonxml::info("<span class=\"LC_error\">".
663: &mt("Unable to make backup [_1]",
664: '<span class="LC_filename">'.
665: $filebak.'</span>')."</span>");
666: $error=2;
667: }
668: my $fh=Apache::File->new(">$file");
669: if (defined($fh)) {
670: print $fh $$result;
671: } else {
672: &Apache::lonxml::info('<span class="LC_error">'.
673: &mt("Unable to write to [_1]",
674: '<span class="LC_filename">'.
675: $file.'</span>').
676: '</span>');
677: $error|=4;
678: }
679: }
680: return $error;
681: }
682:
683: sub analyze_header {
684: my ($request) = @_;
685: my $js = &Apache::structuretags::setmode_javascript();
686:
687: # Breadcrumbs
688: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
689: 'text' => 'Construction Space'},
690: {'href' => '',
691: 'text' => 'Problem Testing'},
692: {'href' => '',
693: 'text' => 'Analyzing a problem'}];
694:
695: my $result =
696: &Apache::loncommon::start_page('Analyzing a problem',
697: $js,
698: {'bread_crumbs' => $brcrum,})
699: .&Apache::loncommon::head_subbox(
700: &Apache::loncommon::CSTR_pageheader());
701: $result .=
702: &Apache::lonxml::message_location().'
703: <form name="lonhomework" method="post" action="'.
704: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
705: '<input type="hidden" name="problemmode" value="'.
706: $env{'form.problemmode'}.'" />'.
707: &Apache::structuretags::remember_problem_state().'
708: <div class="LC_edit_problem_analyze_header">
709: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
710: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
711: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
712: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
713: <hr />
714: <input type="button" name="submitmode" value="'.&mt("View").'" '.
715: 'onclick="javascript:setmode(this.form,'."'view'".')" />
716: <hr />
717: </div>
718: </form>';
719: &Apache::lonxml::add_messages(\$result);
720: $request->print($result);
721: $request->rflush();
722: }
723:
724: sub analyze_footer {
725: my ($request) = @_;
726: $request->print(&Apache::loncommon::end_page());
727: $request->rflush();
728: }
729:
730: sub analyze {
731: my ($request,$file) = @_;
732: &Apache::lonxml::debug("Analyze");
733: my $result;
734: my %overall;
735: my %seedexample;
736: my %allparts;
737: my $rndseed=$env{'form.rndseed'};
738: &analyze_header($request);
739: my %prog_state=
740: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
741: &mt('Getting Problem Variants'),
742: $env{'form.numtoanalyze'},
743: 'inline',undef);
744: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
745: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
746: &mt('last problem'));
747: if (&Apache::loncommon::connection_aborted($request)) { return; }
748: my $thisseed=$i+$rndseed;
749: my $subresult=&Apache::lonnet::ssi($request->uri,
750: ('grade_target' => 'analyze'),
751: ('rndseed' => $thisseed));
752: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
753: my %analyze=&Apache::lonnet::str2hash($subresult);
754: my @parts;
755: if (defined(@{ $analyze{'parts'} })) {
756: @parts=@{ $analyze{'parts'} };
757: }
758: foreach my $part (@parts) {
759: if (!exists($allparts{$part})) {$allparts{$part}=1;};
760: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
761: $analyze{$part.'.type'} eq 'stringresponse' ||
762: $analyze{$part.'.type'} eq 'formularesponse' ) {
763: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
764: my $i=0;
765: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
766: push( @{ $overall{$part.'.answer'}[$i] },
767: $answer_part);
768: my $concatanswer= join("\0",@{ $answer_part });
769: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
770: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
771: }
772: $seedexample{join("\0",$part,$i,@{$answer_part})}=
773: $thisseed;
774: $i++;
775: }
776: }
777: if (!keys(%{ $analyze{$part.'.answer'} })) {
778: my $answer_part =
779: ['<span class="LC_error">'.&mt('Error').'</span>'];
780: $seedexample{join("\0",$part,0,@{$answer_part})}=
781: $thisseed;
782: push( @{ $overall{$part.'.answer'}[0] },
783: $answer_part);
784: }
785: }
786: }
787: }
788: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
789: &mt('Analyzing Results'));
790: $request->print('<hr />'
791: .'<h3>'
792: .&mt('List of possible answers')
793: .'</h3>'
794: );
795: foreach my $part (sort(keys(%allparts))) {
796: if (defined(@{ $overall{$part.'.answer'} })) {
797: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
798: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
799: $request->print(&Apache::loncommon::start_data_table()
800: .&Apache::loncommon::start_data_table_header_row()
801: .'<th colspan="'.($num_cols+1).'">'
802: .&mt('Part').' '.$part
803: );
804: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
805: $request->print(' '.&mt('Answer [_1]',$i+1));
806: }
807: $request->print('</th>'
808: .&Apache::loncommon::end_data_table_header_row()
809: );
810: my %frequency;
811: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
812: $frequency{join("\0",@{ $answer })}++;
813: }
814: $request->print(&Apache::loncommon::start_data_table_header_row()
815: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
816: .'<th>'.&mt('Frequency').'<br />'
817: .'('.&mt('click for example').')</th>'
818: .&Apache::loncommon::end_data_table_header_row()
819: );
820: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
821: $request->print(&Apache::loncommon::start_data_table_row()
822: .'<td>'
823: .join('</td><td>',split("\0",$answer))
824: .'</td>'
825: .'<td>'
826: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
827: .'</td>'
828: .&Apache::loncommon::end_data_table_row()
829: );
830: }
831: $request->print(&Apache::loncommon::end_data_table());
832: }
833: } else {
834: $request->print('<p class="LC_warning">'
835: .&mt('Response [_1] is not analyzable at this time.',$part)
836: .'</p>'
837: );
838: }
839: }
840: if (scalar(keys(%allparts)) == 0 ) {
841: $request->print('<p class="LC_warning">'
842: .&mt('Found no analyzable responses in this problem.'
843: .' Currently only Numerical, Formula and String response styles are supported.')
844: .'</p>'
845: );
846: }
847: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
848: &analyze_footer($request);
849: &Apache::lonhomework::showhash(%overall);
850: return $result;
851: }
852:
853: {
854: my $show_problem_status;
855: sub reset_show_problem_status {
856: undef($show_problem_status);
857: }
858:
859: sub set_show_problem_status {
860: my ($new_status) = @_;
861: $show_problem_status = lc($new_status);
862: }
863:
864: sub hide_problem_status {
865: return ($show_problem_status eq 'no'
866: || $show_problem_status eq 'no_feedback_ever');
867: }
868:
869: sub show_problem_status {
870: return ($show_problem_status eq 'yes'
871: || $show_problem_status eq 'answer'
872: || $show_problem_status eq '');
873: }
874:
875: sub show_some_problem_status {
876: return ($show_problem_status eq 'no');
877: }
878:
879: sub show_no_problem_status {
880: return ($show_problem_status eq 'no_feedback_ever');
881: }
882:
883: sub show_answer_problem_status {
884: return ($show_problem_status eq 'answer');
885: }
886: }
887:
888: sub editxmlmode {
889: my ($request,$file) = @_;
890: my $result;
891: my $problem=&Apache::lonnet::getfile($file);
892: if ($problem eq -1) {
893: &Apache::lonxml::error(
894: '<b> '
895: .&mt('Unable to find [_1]',
896: '<span class="LC_filename">'.$file.'</span>')
897: .'</b>');
898:
899: $problem='';
900: }
901: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
902: my $error=&handle_save_or_undo($request,\$problem,
903: \$env{'form.editxmltext'});
904: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
905: }
906: &Apache::lonhomework::showhashsubset(\%env,'^form');
907: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
908: &Apache::lonhomework::showhashsubset(\%env,'^form');
909: $env{'form.problemmode'}='view';
910: &renderpage($request,$file);
911: } else {
912: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
913: if ($cols > 80) { $cols = 80; }
914: if ($cols < 70) { $cols = 70; }
915: if ($rows < 20) { $rows = 20; }
916: my $js =
917: &Apache::edit::js_change_detection().
918: &Apache::loncommon::resize_textarea_js().
919: &Apache::structuretags::setmode_javascript().
920: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
921: my $dragmath_button =
922: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
923:
924: # Breadcrumbs
925: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
926: 'text' => 'Construction Space'},
927: {'href' => '',
928: 'text' => 'Problem Editing'}];
929:
930: my $start_page =
931: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
932: {'no_auto_mt_title' => 1,
933: 'only_body' => 0,
934: 'add_entries' => {
935: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
936: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
937: },
938: 'bread_crumbs' => $brcrum,
939: });
940:
941: $result=$start_page
942: .&Apache::loncommon::head_subbox(
943: &Apache::loncommon::CSTR_pageheader());
944: $result.=&renderpage($request,$file,['no_output_web'],1).
945: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
946: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
947: &Apache::structuretags::remember_problem_state().'
948: <div class="LC_edit_problem_editxml_header">
949: <table class="LC_edit_problem_header_title"><tr><td>
950: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
951: </td><td align="right">
952: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
953: </td></tr>
954: </table>
955: <div class="LC_edit_problem_discards">
956: <input type="hidden" name="problemmode" value="editxml" />
957:
958: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
959: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
960: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
961: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
962: '.$dragmath_button.'
963: </div>
964: <div class="LC_edit_problem_saves">
965: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
966: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
967: </div>
968: <hr style="clear:both;" />
969: '.&Apache::lonxml::message_location().'
970: </div>
971: ' . '
972: <textarea '.&Apache::edit::element_change_detection().
973: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
974: ' name="editxmltext" id="LC_editxmltext">'.
975: &HTML::Entities::encode($problem,'<>&"').'</textarea>
976: <div id="LC_aftertextarea">
977: </div>
978: </form>'.&Apache::loncommon::end_page();
979: &Apache::lonxml::add_messages(\$result);
980: $request->print($result);
981: }
982: return '';
983: }
984:
985: #
986: # Render the page in whatever target desired.
987: #
988: sub renderpage {
989: my ($request,$file,$targets,$return_string) = @_;
990:
991: my @targets = @{$targets || [&get_target()]};
992: &Apache::lonhomework::showhashsubset(\%env,'form.');
993: &Apache::lonxml::debug("Running targets ".join(':',@targets));
994:
995: my $overall_result;
996: foreach my $target (@targets) {
997: # FIXME need to do something intelligent when a problem goes
998: # from viewable to not viewable due to map conditions
999: #&setuppermissions();
1000: #if ( $Apache::lonhomework::browse ne '2'
1001: # && $Apache::lonhomework::browse ne 'F' ) {
1002: # $request->print(" You most likely shouldn't see me.");
1003: #}
1004: #my $t0 = [&gettimeofday()];
1005: my $output=1;
1006: if ($target eq 'no_output_web') {
1007: $target = 'web'; $output=0;
1008: }
1009: my $problem=&Apache::lonnet::getfile($file);
1010: my $result;
1011: if ($problem eq -1) {
1012: $problem='';
1013: my $filename=(split('/',$file))[-1];
1014: my $error =
1015: "<b> ".&mt('Unable to find [_1]',
1016: '<span class="LC_filename">'.$filename.'</span>')
1017: ."</b>";
1018: $result.=
1019: &Apache::loncommon::simple_error_page($request,'Not available',
1020: $error);
1021: return;
1022: }
1023:
1024: my %mystyle;
1025: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1026: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1027: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1028:
1029: &Apache::lonxml::debug("Should be parsing now");
1030: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1031: &setup_vars($target),%mystyle);
1032: &finished_parsing();
1033: if (!$output) { $result = ''; }
1034: #$request->print("Result follows:");
1035: if ($target eq 'modified') {
1036: &handle_save_or_undo($request,\$problem,\$result);
1037: } else {
1038: if ($target eq 'analyze') {
1039: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1040: undef(%Apache::lonhomework::analyze);
1041: }
1042: #my $td=&tv_interval($t0);
1043: #if ( $Apache::lonxml::debug) {
1044: #$result =~ s:</body>::;
1045: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1046: #}
1047: # $request->print($result);
1048: $overall_result.=$result;
1049: # $request->rflush();
1050: }
1051: #$request->print(":Result ends");
1052: #my $td=&tv_interval($t0);
1053: }
1054: if (!$return_string) {
1055: &Apache::lonxml::add_messages(\$overall_result);
1056: $request->print($overall_result);
1057: $request->rflush();
1058: } else {
1059: return $overall_result;
1060: }
1061: }
1062:
1063: sub finished_parsing {
1064: undef($Apache::lonhomework::parsing_a_problem);
1065: undef($Apache::lonhomework::parsing_a_task);
1066: }
1067:
1068: sub get_template_list {
1069: my ($extension) = @_;
1070: my $result;
1071: my @allnames;
1072: &Apache::lonxml::debug("Looking for :$extension:");
1073: my $glob_extension = $extension;
1074: if ($extension eq 'survey' || $extension eq 'exam') {
1075: $glob_extension = 'problem';
1076: }
1077: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1078: '/templates/*.'.$glob_extension);
1079: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1080: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1081: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1082: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1083: my ($midpoint,$seconddiv,$numfiles);
1084: $numfiles = 0;
1085: foreach my $file (@files) {
1086: next if ($file->[1] !~ /\S/);
1087: $numfiles ++;
1088: }
1089: if ($numfiles > 0) {
1090: $result = '<div class="LC_left_float">';
1091: $midpoint = int($numfiles/2);
1092: if ($numfiles%2) {
1093: $midpoint ++;
1094: }
1095: }
1096: my $count = 0;
1097: my $currentcategory='';
1098: my $first = 1;
1099: foreach my $file (@files) {
1100: next if ($file->[1] !~ /\S/);
1101: if ($file->[2] ne $currentcategory) {
1102: $currentcategory=$file->[2];
1103: if ((!$seconddiv) && ($count >= $midpoint)) {
1104: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1105: $seconddiv = 1;
1106: } elsif (!$first) {
1107: $result.='</div>'."\n";
1108: } else {
1109: $first = 0;
1110: }
1111: $result.= '<div class="LC_Box">'."\n"
1112: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1113: $count++;
1114: }
1115: $result .=
1116: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1117: $file->[1].'</label>';
1118: if ($file->[3]) {
1119: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1120: }
1121: my $filename=$file->[0];
1122: $filename=~s/^\/home\/httpd\/html//;
1123: $result.=' <span class="LC_fontsize_small">'
1124: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1125: .'</span><br />'."\n";
1126: $count ++;
1127: }
1128: if ($numfiles > 0) {
1129: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1130: }
1131: return $result;
1132: }
1133:
1134: sub newproblem {
1135: my ($request) = @_;
1136:
1137: if ($env{'form.template'}) {
1138: my $file = $env{'form.template'};
1139: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1140: &File::Copy::copy($file,$dest);
1141: &renderpage($request,$dest);
1142: return;
1143: }
1144:
1145: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1146: &Apache::lonxml::debug("Looking for :$extension:");
1147: my $templatelist=&get_template_list($extension);
1148: if ($env{'form.newfile'} && !$templatelist) {
1149: # no templates found
1150: my $templatefilename =
1151: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1152: &Apache::lonxml::debug("$templatefilename");
1153: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1154: &File::Copy::copy($templatefilename,$dest);
1155: &renderpage($request,$dest);
1156: } else {
1157: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1158: my $shownurl=$url;
1159: $shownurl=~s-^/~-/priv/-;
1160: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1161: my $errormsg;
1162: my $instructions;
1163: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1164: 'text' => 'Construction Space'},
1165: {'href' => '',
1166: 'text' => "Create New $extension"}];
1167: my $start_page =
1168: &Apache::loncommon::start_page("Create New $extension",
1169: undef,
1170: {'bread_crumbs' => $brcrum,});
1171: $request->print(
1172: $start_page
1173: .&Apache::loncommon::head_subbox(
1174: &Apache::loncommon::CSTR_pageheader())
1175: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1176: $errormsg
1177: ".&mt("The requested file [_1] currently does not exist.",
1178: '<span class="LC_filename">'.$shownurl.'</span>').'
1179: <p class="LC_info">
1180: '.&mt("To create a new $extension, select a template from the".
1181: " list below. Then click on the \"Create $extension\" button.").'
1182: </p><div><form action="'.$url.'" method="post">');
1183:
1184: if (defined($templatelist)) {
1185: $request->print($templatelist);
1186: }
1187: $request->print('<br /><input type="submit" name="newfile" value="'.
1188: &mt("Create $extension").'" />');
1189: $request->print('</form></div>'.&Apache::loncommon::end_page());
1190: }
1191: return;
1192: }
1193:
1194: sub update_construct_style {
1195: if ($env{'request.state'} eq "construct"
1196: && $env{'form.problemmode'} eq 'view'
1197: && defined($env{'form.submitted'})
1198: && !defined($env{'form.resetdata'})
1199: && !defined($env{'form.newrandomization'})) {
1200: if ((!$env{'form.style_file'} && $env{'construct.style'})
1201: ||$env{'form.clear_style_file'}) {
1202: &Apache::lonnet::delenv('construct.style');
1203: } elsif ($env{'form.style_file'}
1204: && $env{'construct.style'} ne $env{'form.style_file'}) {
1205: &Apache::lonnet::appenv({'construct.style' =>
1206: $env{'form.style_file'}});
1207: }
1208: }
1209: }
1210:
1211:
1212: sub handler {
1213: #my $t0 = [&gettimeofday()];
1214: my $request=$_[0];
1215: $Apache::lonxml::request=$request;
1216: $Apache::lonxml::debug=$env{'user.debug'};
1217: $env{'request.uri'}=$request->uri;
1218: &setuppermissions();
1219:
1220: my $file=&Apache::lonnet::filelocation("",$request->uri);
1221:
1222: #check if we know where we are
1223: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1224: # if we are browsing we might not be able to know where we are
1225: if ($Apache::lonhomework::browse ne 'F' &&
1226: $env{'request.state'} ne "construct") {
1227: #should know where we are, so ask
1228: &unset_permissions();
1229: $request->internal_redirect('/adm/ambiguous');
1230: return OK;
1231: }
1232: }
1233: if (&setupheader($request)) {
1234: &unset_permissions();
1235: return OK;
1236: }
1237: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1238: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1239: my ($symb) = &Apache::lonnet::whichuser();
1240: &Apache::lonxml::debug('symb is '.$symb);
1241: if ($env{'request.state'} eq "construct") {
1242: if ( -e $file ) {
1243: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1244: ['problemmode']);
1245: if (!(defined $env{'form.problemmode'})) {
1246: #first visit to problem in construction space
1247: $env{'form.problemmode'}= 'view';
1248: &renderpage($request,$file);
1249: } elsif ($env{'form.problemmode'} eq 'editxml') {
1250: &editxmlmode($request,$file);
1251: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1252: &analyze($request,$file);
1253: } else {
1254: &update_construct_style();
1255: &renderpage($request,$file);
1256: }
1257: } else {
1258: # requested file doesn't exist in contruction space
1259: &newproblem($request);
1260: }
1261: } else {
1262: # just render the page normally outside of construction space
1263: &Apache::lonxml::debug("not construct");
1264: &renderpage($request,$file);
1265: }
1266: #my $td=&tv_interval($t0);
1267: #&Apache::lonxml::debug("Spent $td seconds processing");
1268: # always turn off debug messages
1269: $Apache::lonxml::debug=0;
1270: &unset_permissions();
1271: return OK;
1272:
1273: }
1274:
1275: 1;
1276: __END__
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