1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.326 2011/06/06 16:48:39 www 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: #
133: # We are in construction space, editing and testing problems
134: #
135: if ( defined($env{'form.grade_target'}) ) {
136: return ($env{'form.grade_target'});
137: }
138: if ( defined($env{'form.preview'})) {
139: if ( defined($env{'form.submitted'})) {
140: #
141: # We are doing a problem preview
142: #
143: return ('grade', 'web');
144: } else {
145: return ('web');
146: }
147: } else {
148: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
149: return ('grade','webgrade','answer');
150: } elsif ($env{'form.problemmode'} eq 'view') {
151: return ('grade','web','answer');
152: } elsif ($env{'form.problemmode'} eq 'saveview') {
153: return ('modified','web','answer');
154: } elsif ($env{'form.problemmode'} eq 'discard') {
155: return ('web','answer');
156: } elsif (($env{'form.problemmode'} eq 'saveedit') ||
157: ($env{'form.problemmode'} eq 'undo')) {
158: return ('modified','no_output_web','edit');
159: } elsif ($env{'form.problemmode'} eq 'edit') {
160: return ('no_output_web','edit');
161: } else {
162: return ('web');
163: }
164: }
165: #
166: # End of Construction Space
167: #
168: }
169: #
170: # Huh? We are nowhere, so do nothing.
171: #
172: return ();
173: }
174:
175: sub setup_vars {
176: my ($target) = @_;
177: return ';'
178: # return ';$external::target='.$target.';';
179: }
180:
181: sub proctor_checked_in {
182: my ($slot_name,$slot,$type)=@_;
183: my @possible_proctors=split(",",$slot->{'proctor'});
184:
185: return 1 if (!@possible_proctors);
186:
187: my $key;
188: if ($type eq 'Task') {
189: my $version=$Apache::lonhomework::history{'resource.0.version'};
190: $key ="resource.$version.0.checkedin";
191: } elsif ($type eq 'problem') {
192: $key ='resource.0.checkedin';
193: }
194: # backward compatability, used to be username@domain,
195: # now is username:domain
196: my $who = $Apache::lonhomework::history{$key};
197: if ($who !~ /:/) {
198: $who =~ tr/@/:/;
199: }
200: foreach my $possible (@possible_proctors) {
201: if ($who eq $possible
202: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
203: return 1;
204: }
205: }
206:
207: return 0;
208: }
209:
210: sub check_slot_access {
211: my ($id,$type)=@_;
212:
213: # does it pass normal muster
214: my ($status,$datemsg)=&check_access($id);
215:
216: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
217: if ($useslots ne 'resource' && $useslots ne 'map'
218: && $useslots ne 'map_map') {
219: return ($status,$datemsg);
220: }
221:
222: if ($status eq 'SHOW_ANSWER' ||
223: $status eq 'CLOSED' ||
224: $status eq 'INVALID_ACCESS' ||
225: $status eq 'UNAVAILABLE') {
226: return ($status,$datemsg);
227: }
228: if ($env{'request.state'} eq "construct") {
229: return ($status,$datemsg);
230: }
231:
232: if ($type eq 'Task') {
233: my $version=$Apache::lonhomework::history{'resource.version'};
234: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
235: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
236: return ('SHOW_ANSWER');
237: }
238: }
239:
240: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
241: my $available = &Apache::lonnet::EXT("resource.0.available");
242: my @slots= (split(':',$availablestudent),split(':',$available));
243:
244: # if (!@slots) {
245: # return ($status,$datemsg);
246: # }
247: my $slotstatus='NOT_IN_A_SLOT';
248: my ($returned_slot,$slot_name);
249: foreach my $slot (@slots) {
250: $slot =~ s/(^\s*|\s*$)//g;
251: &Apache::lonxml::debug("getting $slot");
252: my %slot=&Apache::lonnet::get_slot($slot);
253: &Apache::lonhomework::showhash(%slot);
254: if ($slot{'starttime'} < time &&
255: $slot{'endtime'} > time &&
256: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
257: &Apache::lonxml::debug("$slot is good");
258: $slotstatus='NEEDS_CHECKIN';
259: $returned_slot=\%slot;
260: $slot_name=$slot;
261: last;
262: }
263: }
264: if ($slotstatus eq 'NEEDS_CHECKIN' &&
265: &proctor_checked_in($slot_name,$returned_slot,$type)) {
266: &Apache::lonxml::debug("proctor checked in");
267: $slotstatus=$status;
268: }
269:
270: my ($is_correct,$got_grade,$checkedin);
271: if ($type eq 'Task') {
272: my $version=$Apache::lonhomework::history{'resource.0.version'};
273: $got_grade =
274: ($Apache::lonhomework::history{"resource.$version.0.status"}
275: =~ /^(?:pass|fail)$/);
276: $is_correct =
277: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
278: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
279: $checkedin =
280: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
281: } elsif ($type eq 'problem') {
282: $got_grade = 1;
283: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
284: $is_correct =
285: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
286: }
287:
288: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
289:
290: # no slot is currently open, and has been checked in for this version
291: # but hasn't got a grade, therefore must be awaiting a grade
292: if (!defined($slot_name)
293: && $checkedin
294: && !$got_grade) {
295: return ('WAITING_FOR_GRADE');
296: }
297:
298: # Previously used slot is no longer open, and has been checked in for this version.
299: # However, the problem is not closed, and potentially, another slot might be
300: # used to gain access to it to work on it, until the due date is reached, and the
301: # problem then becomes CLOSED. Therefore return the slotstatus -
302: # (which will be NOT_IN_SLOT).
303: if (!defined($slot_name)
304: && $checkedin
305: && $type eq 'problem') {
306: return ($slotstatus);
307: }
308:
309: if ($slotstatus eq 'NOT_IN_A_SLOT'
310: && $checkedin ) {
311:
312: if ($got_grade) {
313: return ('SHOW_ANSWER');
314: } else {
315: return ('WAITING_FOR_GRADE');
316: }
317:
318: }
319:
320: if ( $is_correct) {
321: if ($type eq 'problem') {
322: return ($status);
323: }
324: return ('SHOW_ANSWER');
325: }
326:
327: if ( $status eq 'CANNOT_ANSWER' &&
328: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
329: return ($status,$datemsg);
330: }
331:
332: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
333: }
334:
335: # JB, 9/24/2002: Any changes in this function may require a change
336: # in lonnavmaps::resource::getDateStatus.
337: sub check_access {
338: my ($id) = @_;
339: my $date ='';
340: my $status;
341: my $datemsg = '';
342: my $lastdate = '';
343: my $type;
344: my $passed;
345:
346: if ($env{'request.state'} eq "construct") {
347: if ($env{'form.problemstate'}) {
348: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
349: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
350: && &hide_problem_status())) {
351: return ('CANNOT_ANSWER',
352: &mt('is in this state due to author settings.'));
353: }
354: } else {
355: return ($env{'form.problemstate'},
356: &mt('is in this state due to author settings.'));
357: }
358: }
359: &Apache::lonxml::debug("in construction ignoring dates");
360: $status='CAN_ANSWER';
361: $datemsg=&mt('is in under construction');
362: # return ($status,$datemsg);
363: }
364:
365: &Apache::lonxml::debug("checking for part :$id:");
366: &Apache::lonxml::debug("time:".time);
367:
368: my ($symb)=&Apache::lonnet::whichuser();
369: &Apache::lonxml::debug("symb:".$symb);
370: #if ($env{'request.state'} ne "construct" && $symb ne '') {
371: if ($env{'request.state'} ne "construct") {
372: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
373: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
374: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
375: $status='INVALID_ACCESS';
376: $date=&mt("can not be accessed from your location.");
377: return($status,$date);
378: }
379:
380: foreach my $temp ("opendate","duedate","answerdate") {
381: $lastdate = $date;
382: if ($temp eq 'duedate') {
383: $date = &due_date($id);
384: } else {
385: $date = &Apache::lonnet::EXT("resource.$id.$temp");
386: }
387:
388: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
389: if ($thistype =~ /^(con_lost|no_such_host)/ ||
390: $date =~ /^(con_lost|no_such_host)/) {
391: $status='UNAVAILABLE';
392: $date=&mt("may open later.");
393: return($status,$date);
394: }
395: if ($thistype eq 'date_interval') {
396: if ($temp eq 'opendate') {
397: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
398: }
399: if ($temp eq 'answerdate') {
400: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
401: }
402: }
403: &Apache::lonxml::debug("found :$date: for :$temp:");
404: if ($date eq '') {
405: $date = &mt("an unknown date"); $passed = 0;
406: } elsif ($date eq 'con_lost') {
407: $date = &mt("an indeterminate date"); $passed = 0;
408: } else {
409: if (time < $date) { $passed = 0; } else { $passed = 1; }
410: $date = &Apache::lonlocal::locallocaltime($date);
411: }
412: if (!$passed) { $type=$temp; last; }
413: }
414: &Apache::lonxml::debug("have :$type:$passed:");
415: if ($passed) {
416: $status='SHOW_ANSWER';
417: $datemsg=$date;
418: } elsif ($type eq 'opendate') {
419: $status='CLOSED';
420: $datemsg = &mt("will open on")." $date";
421: } elsif ($type eq 'duedate') {
422: $status='CAN_ANSWER';
423: $datemsg = &mt("is due at")." $date";
424: } elsif ($type eq 'answerdate') {
425: $status='CLOSED';
426: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
427: }
428: }
429: if ($status eq 'CAN_ANSWER' ||
430: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
431: #check #tries, and if correct.
432: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
433: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
434: if ( $tries eq '' ) { $tries = '0'; }
435: if ( $maxtries eq '' &&
436: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
437: $Apache::lonhomework::results{'resource.'.$id.'.maxtries'}=$maxtries;
438: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
439: # if (correct and show prob status) or excused then CANNOT_ANSWER
440: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
441: &&
442: &show_problem_status()
443: &&
444: $Apache::lonhomework::history{"resource.$id.awarded"}==1)
445: ||
446: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
447: $status = 'CANNOT_ANSWER';
448: }
449: if ($status eq 'CANNOT_ANSWER'
450: && &show_answer_problem_status()) {
451: $status = 'SHOW_ANSWER';
452: }
453: }
454: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
455: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
456: &Apache::lonxml::debug("looking for interval @interval");
457: if ($interval[0]) {
458: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
459: &Apache::lonxml::debug("looking for accesstime $first_access");
460: if (!$first_access) {
461: $status='NOT_YET_VIEWED';
462: my $due_date = &due_date($id);
463: my $seconds_left = $due_date - time;
464: if ($seconds_left > $interval[0] || $due_date eq '') {
465: $seconds_left = $interval[0];
466: }
467: $datemsg=&seconds_to_human_length($seconds_left);
468: }
469: }
470: }
471:
472: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
473: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
474: # return ('UNCHECKEDOUT','needs to be checked out');
475: #}
476:
477:
478: &Apache::lonxml::debug("sending back :$status:$datemsg:");
479: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
480: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
481: $status='CAN_ANSWER';
482: $datemsg=&mt('is closed but you are allowed to view it');
483: }
484:
485: return ($status,$datemsg);
486: }
487: # this should work exactly like the copy in lonnavmaps.pm
488: sub due_date {
489: my ($part_id,$symb,$udom,$uname)=@_;
490: my $date;
491: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
492: $udom,$uname);
493: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
494: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
495: $udom,$uname);
496: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
497: if ($interval[0] =~ /\d+/) {
498: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
499: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
500: if (defined($first_access)) {
501: my $interval = $first_access+$interval[0];
502: $date = (!$due_date || $interval < $due_date) ? $interval
503: : $due_date;
504: } else {
505: $date = $due_date;
506: }
507: } else {
508: $date = $due_date;
509: }
510: return $date
511: }
512:
513: sub seconds_to_human_length {
514: my ($length)=@_;
515:
516: my $seconds=$length%60; $length=int($length/60);
517: my $minutes=$length%60; $length=int($length/60);
518: my $hours=$length%24; $length=int($length/24);
519: my $days=$length;
520:
521: my $timestr;
522: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
523: if ($hours > 0) { $timestr.=($timestr?", ":"").
524: &mt('[quant,_1,hour]',$hours); }
525: if ($minutes > 0) { $timestr.=($timestr?", ":"").
526: &mt('[quant,_1,minute]',$minutes); }
527: if ($seconds > 0) { $timestr.=($timestr?", ":"").
528: &mt('[quant,_1,second]',$seconds); }
529: return $timestr;
530: }
531:
532: sub showhash {
533: my (%hash) = @_;
534: &showhashsubset(\%hash,'.');
535: return '';
536: }
537:
538: sub showarray {
539: my ($array)=@_;
540: my $string="(";
541: foreach my $elm (@{ $array }) {
542: if (ref($elm) eq 'ARRAY') {
543: $string.=&showarray($elm);
544: } elsif (ref($elm) eq 'HASH') {
545: $string.= "HASH --- \n<br />";
546: $string.= &showhashsubset($elm,'.');
547: } else {
548: $string.="$elm,"
549: }
550: }
551: chop($string);
552: $string.=")";
553: return $string;
554: }
555:
556: sub showhashsubset {
557: my ($hash,$keyre) = @_;
558: my $resultkey;
559: foreach $resultkey (sort keys %$hash) {
560: if ($resultkey !~ /$keyre/) { next; }
561: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
562: &Apache::lonxml::debug("$resultkey ---- ".
563: &showarray($$hash{$resultkey}));
564: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
565: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
566: &showhashsubset($$hash{$resultkey},'.');
567: } else {
568: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
569: }
570: }
571: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
572: return '';
573: }
574:
575: sub setuppermissions {
576: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
577: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
578: if (! $viewgrades &&
579: exists($env{'request.course.sec'}) &&
580: $env{'request.course.sec'} !~ /^\s*$/) {
581: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
582: '/'.$env{'request.course.sec'});
583: }
584: $Apache::lonhomework::viewgrades = $viewgrades;
585:
586: if ($Apache::lonhomework::browse eq 'F' &&
587: $env{'form.devalidatecourseresdata'} eq 'on') {
588: my (undef,$courseid) = &Apache::lonnet::whichuser();
589: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
590: $env{"course.$courseid.domain"});
591: }
592:
593: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
594: if (! $modifygrades &&
595: exists($env{'request.course.sec'}) &&
596: $env{'request.course.sec'} !~ /^\s*$/) {
597: $modifygrades =
598: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
599: '/'.$env{'request.course.sec'});
600: }
601: $Apache::lonhomework::modifygrades = $modifygrades;
602:
603: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
604: if (! $queuegrade &&
605: exists($env{'request.course.sec'}) &&
606: $env{'request.course.sec'} !~ /^\s*$/) {
607: $queuegrade =
608: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
609: '/'.$env{'request.course.sec'});
610: }
611: $Apache::lonhomework::queuegrade = $queuegrade;
612: return '';
613: }
614:
615: sub unset_permissions {
616: undef($Apache::lonhomework::queuegrade);
617: undef($Apache::lonhomework::modifygrades);
618: undef($Apache::lonhomework::viewgrades);
619: undef($Apache::lonhomework::browse);
620: }
621:
622: sub setupheader {
623: my $request=$_[0];
624: &Apache::loncommon::content_type($request,'text/html');
625: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
626: &Apache::loncommon::no_cache($request);
627: }
628: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
629: # 'lastrevisiondate'));
630: $request->send_http_header;
631: return OK if $request->header_only;
632: return ''
633: }
634:
635: sub handle_save_or_undo {
636: my ($request,$problem,$result) = @_;
637:
638: my $file = &Apache::lonnet::filelocation("",$request->uri);
639: my $filebak =$file.".bak";
640: my $filetmp =$file.".tmp";
641: my $error=0;
642: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
643: my $error=0;
644: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
645: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
646: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
647: if (!$error) {
648: &Apache::lonxml::info("<p><b>".
649: &mt("Undid changes, Switched [_1] and [_2]",
650: '<span class="LC_filename">'.$filebak.
651: '</span>',
652: '<span class="LC_filename">'.$file.
653: '</span>')."</b></p>");
654: } else {
655: &Apache::lonxml::info("<p><span class=\"LC_error\">".
656: &mt("Unable to undo, unable to switch [_1] and [_2]",
657: '<span class="LC_filename">'.
658: $filebak.'</span>',
659: '<span class="LC_filename">'.
660: $file.'</span>')."</span></p>");
661: $error=1;
662: }
663: } else {
664: &Apache::lonnet::correct_line_ends($result);
665:
666: my $fs=Apache::File->new(">$filebak");
667: if (defined($fs)) {
668: print $fs $$problem;
669: } else {
670: &Apache::lonxml::info("<span class=\"LC_error\">".
671: &mt("Unable to make backup [_1]",
672: '<span class="LC_filename">'.
673: $filebak.'</span>')."</span>");
674: $error=2;
675: }
676: my $fh=Apache::File->new(">$file");
677: if (defined($fh)) {
678: print $fh $$result;
679: } else {
680: &Apache::lonxml::info('<span class="LC_error">'.
681: &mt("Unable to write to [_1]",
682: '<span class="LC_filename">'.
683: $file.'</span>').
684: '</span>');
685: $error|=4;
686: }
687: }
688: return $error;
689: }
690:
691: sub analyze_header {
692: my ($request) = @_;
693: my $js = &Apache::structuretags::setmode_javascript();
694:
695: # Breadcrumbs
696: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
697: 'text' => 'Construction Space'},
698: {'href' => '',
699: 'text' => 'Problem Testing'},
700: {'href' => '',
701: 'text' => 'Analyzing a problem'}];
702:
703: my $result =
704: &Apache::loncommon::start_page('Analyzing a problem',
705: $js,
706: {'bread_crumbs' => $brcrum,})
707: .&Apache::loncommon::head_subbox(
708: &Apache::loncommon::CSTR_pageheader());
709: $result .=
710: &Apache::lonxml::message_location().'
711: <form name="lonhomework" method="post" action="'.
712: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
713: '<input type="hidden" name="problemmode" value="'.
714: $env{'form.problemmode'}.'" />'.
715: &Apache::structuretags::remember_problem_state().'
716: <div class="LC_edit_problem_analyze_header">
717: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
718: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
719: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
720: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
721: <hr />
722: <input type="button" name="submitmode" value="'.&mt("View").'" '.
723: 'onclick="javascript:setmode(this.form,'."'view'".')" />
724: <hr />
725: </div>
726: </form>';
727: &Apache::lonxml::add_messages(\$result);
728: $request->print($result);
729: $request->rflush();
730: }
731:
732: sub analyze_footer {
733: my ($request) = @_;
734: $request->print(&Apache::loncommon::end_page());
735: $request->rflush();
736: }
737:
738: sub analyze {
739: my ($request,$file) = @_;
740: &Apache::lonxml::debug("Analyze");
741: my $result;
742: my %overall;
743: my %seedexample;
744: my %allparts;
745: my $rndseed=$env{'form.rndseed'};
746: &analyze_header($request);
747: my %prog_state=
748: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
749: &mt('Getting Problem Variants'),
750: $env{'form.numtoanalyze'},
751: 'inline',undef);
752: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
753: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
754: &mt('last problem'));
755: if (&Apache::loncommon::connection_aborted($request)) { return; }
756: my $thisseed=$i+$rndseed;
757: my $subresult=&Apache::lonnet::ssi($request->uri,
758: ('grade_target' => 'analyze'),
759: ('rndseed' => $thisseed));
760: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
761: my %analyze=&Apache::lonnet::str2hash($subresult);
762: my @parts;
763: if (defined(@{ $analyze{'parts'} })) {
764: @parts=@{ $analyze{'parts'} };
765: }
766: foreach my $part (@parts) {
767: if (!exists($allparts{$part})) {$allparts{$part}=1;};
768: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
769: $analyze{$part.'.type'} eq 'stringresponse' ||
770: $analyze{$part.'.type'} eq 'formularesponse' ) {
771: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
772: my $i=0;
773: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
774: push( @{ $overall{$part.'.answer'}[$i] },
775: $answer_part);
776: my $concatanswer= join("\0",@{ $answer_part });
777: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
778: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
779: }
780: $seedexample{join("\0",$part,$i,@{$answer_part})}=
781: $thisseed;
782: $i++;
783: }
784: }
785: if (!keys(%{ $analyze{$part.'.answer'} })) {
786: my $answer_part =
787: ['<span class="LC_error">'.&mt('Error').'</span>'];
788: $seedexample{join("\0",$part,0,@{$answer_part})}=
789: $thisseed;
790: push( @{ $overall{$part.'.answer'}[0] },
791: $answer_part);
792: }
793: }
794: }
795: }
796: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
797: &mt('Analyzing Results'));
798: $request->print('<hr />'
799: .'<h3>'
800: .&mt('List of possible answers')
801: .'</h3>'
802: );
803: foreach my $part (sort(keys(%allparts))) {
804: if (defined(@{ $overall{$part.'.answer'} })) {
805: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
806: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
807: $request->print(&Apache::loncommon::start_data_table()
808: .&Apache::loncommon::start_data_table_header_row()
809: .'<th colspan="'.($num_cols+1).'">'
810: .&mt('Part').' '.$part
811: );
812: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
813: $request->print(' '.&mt('Answer [_1]',$i+1));
814: }
815: $request->print('</th>'
816: .&Apache::loncommon::end_data_table_header_row()
817: );
818: my %frequency;
819: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
820: $frequency{join("\0",@{ $answer })}++;
821: }
822: $request->print(&Apache::loncommon::start_data_table_header_row()
823: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
824: .'<th>'.&mt('Frequency').'<br />'
825: .'('.&mt('click for example').')</th>'
826: .&Apache::loncommon::end_data_table_header_row()
827: );
828: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
829: $request->print(&Apache::loncommon::start_data_table_row()
830: .'<td>'
831: .join('</td><td>',split("\0",$answer))
832: .'</td>'
833: .'<td>'
834: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
835: .'</td>'
836: .&Apache::loncommon::end_data_table_row()
837: );
838: }
839: $request->print(&Apache::loncommon::end_data_table());
840: }
841: } else {
842: $request->print('<p class="LC_warning">'
843: .&mt('Response [_1] is not analyzable at this time.',$part)
844: .'</p>'
845: );
846: }
847: }
848: if (scalar(keys(%allparts)) == 0 ) {
849: $request->print('<p class="LC_warning">'
850: .&mt('Found no analyzable responses in this problem.'
851: .' Currently only Numerical, Formula and String response styles are supported.')
852: .'</p>'
853: );
854: }
855: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
856: &analyze_footer($request);
857: &Apache::lonhomework::showhash(%overall);
858: return $result;
859: }
860:
861: {
862: my $show_problem_status;
863: sub reset_show_problem_status {
864: undef($show_problem_status);
865: }
866:
867: sub set_show_problem_status {
868: my ($new_status) = @_;
869: $show_problem_status = lc($new_status);
870: }
871:
872: sub hide_problem_status {
873: return ($show_problem_status eq 'no'
874: || $show_problem_status eq 'no_feedback_ever');
875: }
876:
877: sub show_problem_status {
878: return ($show_problem_status eq 'yes'
879: || $show_problem_status eq 'answer'
880: || $show_problem_status eq '');
881: }
882:
883: sub show_some_problem_status {
884: return ($show_problem_status eq 'no');
885: }
886:
887: sub show_no_problem_status {
888: return ($show_problem_status eq 'no_feedback_ever');
889: }
890:
891: sub show_answer_problem_status {
892: return ($show_problem_status eq 'answer');
893: }
894: }
895:
896: sub editxmlmode {
897: my ($request,$file) = @_;
898: my $result;
899: my $problem=&Apache::lonnet::getfile($file);
900: if ($problem eq -1) {
901: &Apache::lonxml::error(
902: '<b> '
903: .&mt('Unable to find [_1]',
904: '<span class="LC_filename">'.$file.'</span>')
905: .'</b>');
906:
907: $problem='';
908: }
909:
910: if (($env{'form.problemmode'} eq 'saveeditxml') ||
911: ($env{'form.problemmode'} eq 'saveviewxml') ||
912: ($env{'form.problemmode'} eq 'undoxml')) {
913: my $error=&handle_save_or_undo($request,\$problem,
914: \$env{'form.editxmltext'});
915: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
916: }
917: &Apache::lonhomework::showhashsubset(\%env,'^form');
918: if ($env{'form.problemmode'} eq 'saveviewxml') {
919: &Apache::lonhomework::showhashsubset(\%env,'^form');
920: $env{'form.problemmode'}='view';
921: &renderpage($request,$file);
922: } else {
923: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
924: if ($cols > 80) { $cols = 80; }
925: if ($cols < 70) { $cols = 70; }
926: if ($rows < 20) { $rows = 20; }
927: my $js =
928: &Apache::edit::js_change_detection().
929: &Apache::loncommon::resize_textarea_js().
930: &Apache::structuretags::setmode_javascript().
931: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
932:
933: # Breadcrumbs
934: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
935: 'text' => 'Construction Space'},
936: {'href' => '',
937: 'text' => 'Problem Editing'}];
938:
939: my $start_page =
940: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
941: {'no_auto_mt_title' => 1,
942: 'only_body' => 0,
943: 'add_entries' => {
944: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
945: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
946: },
947: 'bread_crumbs' => $brcrum,
948: });
949:
950: $result=$start_page
951: .&Apache::loncommon::head_subbox(
952: &Apache::loncommon::CSTR_pageheader());
953: $result.=&renderpage($request,$file,['no_output_web'],1).
954: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
955: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
956: &Apache::structuretags::remember_problem_state().'
957: <div class="LC_edit_problem_editxml_header">
958: <table class="LC_edit_problem_header_title"><tr><td>
959: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
960: </td><td align="right">
961: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
962: </td></tr>
963: </table>';
964:
965: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
966: &Apache::structuretags::problem_edit_buttons('editxml');
967:
968: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
969: '<textarea '.&Apache::edit::element_change_detection().
970: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
971: ' name="editxmltext" id="LC_editxmltext">'.
972: &HTML::Entities::encode($problem,'<>&"').'</textarea>
973: <div id="LC_aftertextarea">
974: </div>
975: </form>'.&Apache::loncommon::end_page();
976: &Apache::lonxml::add_messages(\$result);
977: $request->print($result);
978: }
979: return '';
980: }
981:
982: #
983: # Render the page in whatever target desired.
984: #
985: sub renderpage {
986: my ($request,$file,$targets,$return_string) = @_;
987:
988: my @targets = @{$targets || [&get_target()]};
989: &Apache::lonhomework::showhashsubset(\%env,'form.');
990: &Apache::lonxml::debug("Running targets ".join(':',@targets));
991:
992: my $overall_result;
993: foreach my $target (@targets) {
994: # FIXME need to do something intelligent when a problem goes
995: # from viewable to not viewable due to map conditions
996: #&setuppermissions();
997: #if ( $Apache::lonhomework::browse ne '2'
998: # && $Apache::lonhomework::browse ne 'F' ) {
999: # $request->print(" You most likely shouldn't see me.");
1000: #}
1001: #my $t0 = [&gettimeofday()];
1002: my $output=1;
1003: if ($target eq 'no_output_web') {
1004: $target = 'web'; $output=0;
1005: }
1006: my $problem=&Apache::lonnet::getfile($file);
1007: my $result;
1008: if ($problem eq -1) {
1009: $problem='';
1010: my $filename=(split('/',$file))[-1];
1011: my $error =
1012: "<b> ".&mt('Unable to find [_1]',
1013: '<span class="LC_filename">'.$filename.'</span>')
1014: ."</b>";
1015: $result.=
1016: &Apache::loncommon::simple_error_page($request,'Not available',
1017: $error);
1018: return;
1019: }
1020:
1021: my %mystyle;
1022: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1023: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1024: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1025:
1026: &Apache::lonxml::debug("Should be parsing now");
1027: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1028: &setup_vars($target),%mystyle);
1029: &finished_parsing();
1030: if (!$output) { $result = ''; }
1031: #$request->print("Result follows:");
1032: if ($target eq 'modified') {
1033: &handle_save_or_undo($request,\$problem,\$result);
1034: } else {
1035: if ($target eq 'analyze') {
1036: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1037: undef(%Apache::lonhomework::analyze);
1038: }
1039: #my $td=&tv_interval($t0);
1040: #if ( $Apache::lonxml::debug) {
1041: #$result =~ s:</body>::;
1042: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1043: #}
1044: # $request->print($result);
1045: $overall_result.=$result;
1046: # $request->rflush();
1047: }
1048: #$request->print(":Result ends");
1049: #my $td=&tv_interval($t0);
1050: }
1051: if (!$return_string) {
1052: &Apache::lonxml::add_messages(\$overall_result);
1053: $request->print($overall_result);
1054: $request->rflush();
1055: } else {
1056: return $overall_result;
1057: }
1058: }
1059:
1060: sub finished_parsing {
1061: undef($Apache::lonhomework::parsing_a_problem);
1062: undef($Apache::lonhomework::parsing_a_task);
1063: }
1064:
1065: sub get_template_list {
1066: my ($extension) = @_;
1067: my $result;
1068: my @allnames;
1069: &Apache::lonxml::debug("Looking for :$extension:");
1070: my $glob_extension = $extension;
1071: if ($extension eq 'survey' || $extension eq 'exam') {
1072: $glob_extension = 'problem';
1073: }
1074: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1075: '/templates/*.'.$glob_extension);
1076: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1077: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1078: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1079: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1080: my ($midpoint,$seconddiv,$numfiles);
1081: $numfiles = 0;
1082: foreach my $file (@files) {
1083: next if ($file->[1] !~ /\S/);
1084: $numfiles ++;
1085: }
1086: if ($numfiles > 0) {
1087: $result = '<div class="LC_left_float">';
1088: $midpoint = int($numfiles/2);
1089: if ($numfiles%2) {
1090: $midpoint ++;
1091: }
1092: }
1093: my $count = 0;
1094: my $currentcategory='';
1095: my $first = 1;
1096: foreach my $file (@files) {
1097: next if ($file->[1] !~ /\S/);
1098: if ($file->[2] ne $currentcategory) {
1099: $currentcategory=$file->[2];
1100: if ((!$seconddiv) && ($count >= $midpoint)) {
1101: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1102: $seconddiv = 1;
1103: } elsif (!$first) {
1104: $result.='</div>'."\n";
1105: } else {
1106: $first = 0;
1107: }
1108: $result.= '<div class="LC_Box">'."\n"
1109: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1110: $count++;
1111: }
1112: $result .=
1113: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1114: $file->[1].'</label>';
1115: if ($file->[3]) {
1116: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1117: }
1118: my $filename=$file->[0];
1119: $filename=~s/^\/home\/httpd\/html//;
1120: $result.=' <span class="LC_fontsize_small">'
1121: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1122: .'</span><br />'."\n";
1123: $count ++;
1124: }
1125: if ($numfiles > 0) {
1126: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1127: }
1128: return $result;
1129: }
1130:
1131: sub newproblem {
1132: my ($request) = @_;
1133:
1134: if ($env{'form.template'}) {
1135: my $file = $env{'form.template'};
1136: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1137: &File::Copy::copy($file,$dest);
1138: &renderpage($request,$dest);
1139: return;
1140: }
1141:
1142: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1143: &Apache::lonxml::debug("Looking for :$extension:");
1144: my $templatelist=&get_template_list($extension);
1145: if ($env{'form.newfile'} && !$templatelist) {
1146: # no templates found
1147: my $templatefilename =
1148: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1149: &Apache::lonxml::debug("$templatefilename");
1150: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1151: &File::Copy::copy($templatefilename,$dest);
1152: &renderpage($request,$dest);
1153: } else {
1154: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1155: my $shownurl=$url;
1156: $shownurl=~s-^/~-/priv/-;
1157: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1158: my $errormsg;
1159: my $instructions;
1160: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1161: 'text' => 'Construction Space'},
1162: {'href' => '',
1163: 'text' => "Create New $extension"}];
1164: my $start_page =
1165: &Apache::loncommon::start_page("Create New $extension",
1166: undef,
1167: {'bread_crumbs' => $brcrum,});
1168: $request->print(
1169: $start_page
1170: .&Apache::loncommon::head_subbox(
1171: &Apache::loncommon::CSTR_pageheader())
1172: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1173: $errormsg
1174: ".&mt("The requested file [_1] currently does not exist.",
1175: '<span class="LC_filename">'.$shownurl.'</span>').'
1176: <p class="LC_info">
1177: '.&mt("To create a new $extension, select a template from the".
1178: " list below. Then click on the \"Create $extension\" button.").'
1179: </p><div><form action="'.$url.'" method="post">');
1180:
1181: if (defined($templatelist)) {
1182: $request->print($templatelist);
1183: }
1184: $request->print('<br /><input type="submit" name="newfile" value="'.
1185: &mt("Create $extension").'" />');
1186: $request->print('</form></div>'.&Apache::loncommon::end_page());
1187: }
1188: return;
1189: }
1190:
1191: sub update_construct_style {
1192: if ($env{'request.state'} eq "construct"
1193: && $env{'form.problemmode'} eq 'view'
1194: && defined($env{'form.submitted'})
1195: && !defined($env{'form.resetdata'})
1196: && !defined($env{'form.newrandomization'})) {
1197: if ((!$env{'form.style_file'} && $env{'construct.style'})
1198: ||$env{'form.clear_style_file'}) {
1199: &Apache::lonnet::delenv('construct.style');
1200: } elsif ($env{'form.style_file'}
1201: && $env{'construct.style'} ne $env{'form.style_file'}) {
1202: &Apache::lonnet::appenv({'construct.style' =>
1203: $env{'form.style_file'}});
1204: }
1205: }
1206: }
1207:
1208:
1209: sub handler {
1210: #my $t0 = [&gettimeofday()];
1211: my $request=$_[0];
1212: $Apache::lonxml::request=$request;
1213: $Apache::lonxml::debug=$env{'user.debug'};
1214: $env{'request.uri'}=$request->uri;
1215: &setuppermissions();
1216:
1217: my $file=&Apache::lonnet::filelocation("",$request->uri);
1218:
1219: #check if we know where we are
1220: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1221: # if we are browsing we might not be able to know where we are
1222: if ($Apache::lonhomework::browse ne 'F' &&
1223: $env{'request.state'} ne "construct") {
1224: #should know where we are, so ask
1225: &unset_permissions();
1226: $request->internal_redirect('/adm/ambiguous');
1227: return OK;
1228: }
1229: }
1230: if (&setupheader($request)) {
1231: &unset_permissions();
1232: return OK;
1233: }
1234: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1235: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1236: my ($symb) = &Apache::lonnet::whichuser();
1237: &Apache::lonxml::debug('symb is '.$symb);
1238: if ($env{'request.state'} eq "construct") {
1239: if ( -e $file ) {
1240: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1241: ['problemmode']);
1242: if (!(defined $env{'form.problemmode'})) {
1243: #first visit to problem in construction space
1244: $env{'form.problemmode'}= 'view';
1245: &renderpage($request,$file);
1246: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1247: ($env{'form.problemmode'} eq 'saveeditxml') ||
1248: ($env{'form.problemmode'} eq 'saveviewxml') ||
1249: ($env{'form.problemmode'} eq 'undoxml')) {
1250: &editxmlmode($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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