1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.323 2011/02/06 18:43:10 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 'saveview') {
151: return ('modified','web','answer');
152: } elsif ($env{'form.problemmode'} eq 'discard') {
153: return ('web','answer');
154: } elsif (($env{'form.problemmode'} eq 'saveedit') ||
155: ($env{'form.problemmode'} eq 'undo')) {
156: return ('modified','no_output_web','edit');
157: } elsif ($env{'form.problemmode'} eq 'edit') {
158: return ('no_output_web','edit');
159: } else {
160: return ('web');
161: }
162: }
163: #
164: # End of Construction Space
165: #
166: }
167: #
168: # Huh? We are nowhere, so do nothing.
169: #
170: return ();
171: }
172:
173: sub setup_vars {
174: my ($target) = @_;
175: return ';'
176: # return ';$external::target='.$target.';';
177: }
178:
179: sub proctor_checked_in {
180: my ($slot_name,$slot,$type)=@_;
181: my @possible_proctors=split(",",$slot->{'proctor'});
182:
183: return 1 if (!@possible_proctors);
184:
185: my $key;
186: if ($type eq 'Task') {
187: my $version=$Apache::lonhomework::history{'resource.0.version'};
188: $key ="resource.$version.0.checkedin";
189: } elsif ($type eq 'problem') {
190: $key ='resource.0.checkedin';
191: }
192: # backward compatability, used to be username@domain,
193: # now is username:domain
194: my $who = $Apache::lonhomework::history{$key};
195: if ($who !~ /:/) {
196: $who =~ tr/@/:/;
197: }
198: foreach my $possible (@possible_proctors) {
199: if ($who eq $possible
200: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
201: return 1;
202: }
203: }
204:
205: return 0;
206: }
207:
208: sub check_slot_access {
209: my ($id,$type)=@_;
210:
211: # does it pass normal muster
212: my ($status,$datemsg)=&check_access($id);
213:
214: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
215: if ($useslots ne 'resource' && $useslots ne 'map'
216: && $useslots ne 'map_map') {
217: return ($status,$datemsg);
218: }
219:
220: if ($status eq 'SHOW_ANSWER' ||
221: $status eq 'CLOSED' ||
222: $status eq 'INVALID_ACCESS' ||
223: $status eq 'UNAVAILABLE') {
224: return ($status,$datemsg);
225: }
226: if ($env{'request.state'} eq "construct") {
227: return ($status,$datemsg);
228: }
229:
230: if ($type eq 'Task') {
231: my $version=$Apache::lonhomework::history{'resource.version'};
232: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
233: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
234: return ('SHOW_ANSWER');
235: }
236: }
237:
238: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
239: my $available = &Apache::lonnet::EXT("resource.0.available");
240: my @slots= (split(':',$availablestudent),split(':',$available));
241:
242: # if (!@slots) {
243: # return ($status,$datemsg);
244: # }
245: my $slotstatus='NOT_IN_A_SLOT';
246: my ($returned_slot,$slot_name);
247: foreach my $slot (@slots) {
248: $slot =~ s/(^\s*|\s*$)//g;
249: &Apache::lonxml::debug("getting $slot");
250: my %slot=&Apache::lonnet::get_slot($slot);
251: &Apache::lonhomework::showhash(%slot);
252: if ($slot{'starttime'} < time &&
253: $slot{'endtime'} > time &&
254: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
255: &Apache::lonxml::debug("$slot is good");
256: $slotstatus='NEEDS_CHECKIN';
257: $returned_slot=\%slot;
258: $slot_name=$slot;
259: last;
260: }
261: }
262: if ($slotstatus eq 'NEEDS_CHECKIN' &&
263: &proctor_checked_in($slot_name,$returned_slot,$type)) {
264: &Apache::lonxml::debug("proctor checked in");
265: $slotstatus=$status;
266: }
267:
268: my ($is_correct,$got_grade,$checkedin);
269: if ($type eq 'Task') {
270: my $version=$Apache::lonhomework::history{'resource.0.version'};
271: $got_grade =
272: ($Apache::lonhomework::history{"resource.$version.0.status"}
273: =~ /^(?:pass|fail)$/);
274: $is_correct =
275: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
276: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
277: $checkedin =
278: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
279: } elsif ($type eq 'problem') {
280: $got_grade = 1;
281: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
282: $is_correct =
283: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
284: }
285:
286: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
287:
288: # no slot is currently open, and has been checked in for this version
289: # but hasn't got a grade, therefore must be awaiting a grade
290: if (!defined($slot_name)
291: && $checkedin
292: && !$got_grade) {
293: return ('WAITING_FOR_GRADE');
294: }
295:
296: # Previously used slot is no longer open, and has been checked in for this version.
297: # However, the problem is not closed, and potentially, another slot might be
298: # used to gain access to it to work on it, until the due date is reached, and the
299: # problem then becomes CLOSED. Therefore return the slotstatus -
300: # (which will be NOT_IN_SLOT).
301: if (!defined($slot_name)
302: && $checkedin
303: && $type eq 'problem') {
304: return ($slotstatus);
305: }
306:
307: if ($slotstatus eq 'NOT_IN_A_SLOT'
308: && $checkedin ) {
309:
310: if ($got_grade) {
311: return ('SHOW_ANSWER');
312: } else {
313: return ('WAITING_FOR_GRADE');
314: }
315:
316: }
317:
318: if ( $is_correct) {
319: if ($type eq 'problem') {
320: return ($status);
321: }
322: return ('SHOW_ANSWER');
323: }
324:
325: if ( $status eq 'CANNOT_ANSWER' &&
326: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
327: return ($status,$datemsg);
328: }
329:
330: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
331: }
332:
333: # JB, 9/24/2002: Any changes in this function may require a change
334: # in lonnavmaps::resource::getDateStatus.
335: sub check_access {
336: my ($id) = @_;
337: my $date ='';
338: my $status;
339: my $datemsg = '';
340: my $lastdate = '';
341: my $type;
342: my $passed;
343:
344: if ($env{'request.state'} eq "construct") {
345: if ($env{'form.problemstate'}) {
346: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
347: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
348: && &hide_problem_status())) {
349: return ('CANNOT_ANSWER',
350: &mt('is in this state due to author settings.'));
351: }
352: } else {
353: return ($env{'form.problemstate'},
354: &mt('is in this state due to author settings.'));
355: }
356: }
357: &Apache::lonxml::debug("in construction ignoring dates");
358: $status='CAN_ANSWER';
359: $datemsg=&mt('is in under construction');
360: # return ($status,$datemsg);
361: }
362:
363: &Apache::lonxml::debug("checking for part :$id:");
364: &Apache::lonxml::debug("time:".time);
365:
366: my ($symb)=&Apache::lonnet::whichuser();
367: &Apache::lonxml::debug("symb:".$symb);
368: #if ($env{'request.state'} ne "construct" && $symb ne '') {
369: if ($env{'request.state'} ne "construct") {
370: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
371: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
372: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
373: $status='INVALID_ACCESS';
374: $date=&mt("can not be accessed from your location.");
375: return($status,$date);
376: }
377:
378: foreach my $temp ("opendate","duedate","answerdate") {
379: $lastdate = $date;
380: if ($temp eq 'duedate') {
381: $date = &due_date($id);
382: } else {
383: $date = &Apache::lonnet::EXT("resource.$id.$temp");
384: }
385:
386: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
387: if ($thistype =~ /^(con_lost|no_such_host)/ ||
388: $date =~ /^(con_lost|no_such_host)/) {
389: $status='UNAVAILABLE';
390: $date=&mt("may open later.");
391: return($status,$date);
392: }
393: if ($thistype eq 'date_interval') {
394: if ($temp eq 'opendate') {
395: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
396: }
397: if ($temp eq 'answerdate') {
398: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
399: }
400: }
401: &Apache::lonxml::debug("found :$date: for :$temp:");
402: if ($date eq '') {
403: $date = &mt("an unknown date"); $passed = 0;
404: } elsif ($date eq 'con_lost') {
405: $date = &mt("an indeterminate date"); $passed = 0;
406: } else {
407: if (time < $date) { $passed = 0; } else { $passed = 1; }
408: $date = &Apache::lonlocal::locallocaltime($date);
409: }
410: if (!$passed) { $type=$temp; last; }
411: }
412: &Apache::lonxml::debug("have :$type:$passed:");
413: if ($passed) {
414: $status='SHOW_ANSWER';
415: $datemsg=$date;
416: } elsif ($type eq 'opendate') {
417: $status='CLOSED';
418: $datemsg = &mt("will open on")." $date";
419: } elsif ($type eq 'duedate') {
420: $status='CAN_ANSWER';
421: $datemsg = &mt("is due at")." $date";
422: } elsif ($type eq 'answerdate') {
423: $status='CLOSED';
424: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
425: }
426: }
427: if ($status eq 'CAN_ANSWER' ||
428: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
429: #check #tries, and if correct.
430: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
431: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
432: if ( $tries eq '' ) { $tries = '0'; }
433: if ( $maxtries eq '' &&
434: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
435: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
436: # if (correct and show prob status) or excused then CANNOT_ANSWER
437: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
438: &&
439: &show_problem_status())
440: ||
441: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
442: $status = 'CANNOT_ANSWER';
443: }
444: if ($status eq 'CANNOT_ANSWER'
445: && &show_answer_problem_status()) {
446: $status = 'SHOW_ANSWER';
447: }
448: }
449: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
450: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
451: &Apache::lonxml::debug("looking for interval @interval");
452: if ($interval[0]) {
453: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
454: &Apache::lonxml::debug("looking for accesstime $first_access");
455: if (!$first_access) {
456: $status='NOT_YET_VIEWED';
457: my $due_date = &due_date($id);
458: my $seconds_left = $due_date - time;
459: if ($seconds_left > $interval[0] || $due_date eq '') {
460: $seconds_left = $interval[0];
461: }
462: $datemsg=&seconds_to_human_length($seconds_left);
463: }
464: }
465: }
466:
467: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
468: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
469: # return ('UNCHECKEDOUT','needs to be checked out');
470: #}
471:
472:
473: &Apache::lonxml::debug("sending back :$status:$datemsg:");
474: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
475: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
476: $status='CAN_ANSWER';
477: $datemsg=&mt('is closed but you are allowed to view it');
478: }
479:
480: return ($status,$datemsg);
481: }
482: # this should work exactly like the copy in lonnavmaps.pm
483: sub due_date {
484: my ($part_id,$symb,$udom,$uname)=@_;
485: my $date;
486: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
487: $udom,$uname);
488: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
489: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
490: $udom,$uname);
491: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
492: if ($interval[0] =~ /\d+/) {
493: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
494: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
495: if (defined($first_access)) {
496: my $interval = $first_access+$interval[0];
497: $date = (!$due_date || $interval < $due_date) ? $interval
498: : $due_date;
499: } else {
500: $date = $due_date;
501: }
502: } else {
503: $date = $due_date;
504: }
505: return $date
506: }
507:
508: sub seconds_to_human_length {
509: my ($length)=@_;
510:
511: my $seconds=$length%60; $length=int($length/60);
512: my $minutes=$length%60; $length=int($length/60);
513: my $hours=$length%24; $length=int($length/24);
514: my $days=$length;
515:
516: my $timestr;
517: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
518: if ($hours > 0) { $timestr.=($timestr?", ":"").
519: &mt('[quant,_1,hour]',$hours); }
520: if ($minutes > 0) { $timestr.=($timestr?", ":"").
521: &mt('[quant,_1,minute]',$minutes); }
522: if ($seconds > 0) { $timestr.=($timestr?", ":"").
523: &mt('[quant,_1,second]',$seconds); }
524: return $timestr;
525: }
526:
527: sub showhash {
528: my (%hash) = @_;
529: &showhashsubset(\%hash,'.');
530: return '';
531: }
532:
533: sub showarray {
534: my ($array)=@_;
535: my $string="(";
536: foreach my $elm (@{ $array }) {
537: if (ref($elm) eq 'ARRAY') {
538: $string.=&showarray($elm);
539: } elsif (ref($elm) eq 'HASH') {
540: $string.= "HASH --- \n<br />";
541: $string.= &showhashsubset($elm,'.');
542: } else {
543: $string.="$elm,"
544: }
545: }
546: chop($string);
547: $string.=")";
548: return $string;
549: }
550:
551: sub showhashsubset {
552: my ($hash,$keyre) = @_;
553: my $resultkey;
554: foreach $resultkey (sort keys %$hash) {
555: if ($resultkey !~ /$keyre/) { next; }
556: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
557: &Apache::lonxml::debug("$resultkey ---- ".
558: &showarray($$hash{$resultkey}));
559: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
560: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
561: &showhashsubset($$hash{$resultkey},'.');
562: } else {
563: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
564: }
565: }
566: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
567: return '';
568: }
569:
570: sub setuppermissions {
571: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
572: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
573: if (! $viewgrades &&
574: exists($env{'request.course.sec'}) &&
575: $env{'request.course.sec'} !~ /^\s*$/) {
576: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
577: '/'.$env{'request.course.sec'});
578: }
579: $Apache::lonhomework::viewgrades = $viewgrades;
580:
581: if ($Apache::lonhomework::browse eq 'F' &&
582: $env{'form.devalidatecourseresdata'} eq 'on') {
583: my (undef,$courseid) = &Apache::lonnet::whichuser();
584: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
585: $env{"course.$courseid.domain"});
586: }
587:
588: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
589: if (! $modifygrades &&
590: exists($env{'request.course.sec'}) &&
591: $env{'request.course.sec'} !~ /^\s*$/) {
592: $modifygrades =
593: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
594: '/'.$env{'request.course.sec'});
595: }
596: $Apache::lonhomework::modifygrades = $modifygrades;
597:
598: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
599: if (! $queuegrade &&
600: exists($env{'request.course.sec'}) &&
601: $env{'request.course.sec'} !~ /^\s*$/) {
602: $queuegrade =
603: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
604: '/'.$env{'request.course.sec'});
605: }
606: $Apache::lonhomework::queuegrade = $queuegrade;
607: return '';
608: }
609:
610: sub unset_permissions {
611: undef($Apache::lonhomework::queuegrade);
612: undef($Apache::lonhomework::modifygrades);
613: undef($Apache::lonhomework::viewgrades);
614: undef($Apache::lonhomework::browse);
615: }
616:
617: sub setupheader {
618: my $request=$_[0];
619: &Apache::loncommon::content_type($request,'text/html');
620: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
621: &Apache::loncommon::no_cache($request);
622: }
623: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
624: # 'lastrevisiondate'));
625: $request->send_http_header;
626: return OK if $request->header_only;
627: return ''
628: }
629:
630: sub handle_save_or_undo {
631: my ($request,$problem,$result) = @_;
632:
633: my $file = &Apache::lonnet::filelocation("",$request->uri);
634: my $filebak =$file.".bak";
635: my $filetmp =$file.".tmp";
636: my $error=0;
637: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
638: my $error=0;
639: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
640: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
641: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
642: if (!$error) {
643: &Apache::lonxml::info("<p><b>".
644: &mt("Undid changes, Switched [_1] and [_2]",
645: '<span class="LC_filename">'.$filebak.
646: '</span>',
647: '<span class="LC_filename">'.$file.
648: '</span>')."</b></p>");
649: } else {
650: &Apache::lonxml::info("<p><span class=\"LC_error\">".
651: &mt("Unable to undo, unable to switch [_1] and [_2]",
652: '<span class="LC_filename">'.
653: $filebak.'</span>',
654: '<span class="LC_filename">'.
655: $file.'</span>')."</span></p>");
656: $error=1;
657: }
658: } else {
659: &Apache::lonnet::correct_line_ends($result);
660:
661: my $fs=Apache::File->new(">$filebak");
662: if (defined($fs)) {
663: print $fs $$problem;
664: } else {
665: &Apache::lonxml::info("<span class=\"LC_error\">".
666: &mt("Unable to make backup [_1]",
667: '<span class="LC_filename">'.
668: $filebak.'</span>')."</span>");
669: $error=2;
670: }
671: my $fh=Apache::File->new(">$file");
672: if (defined($fh)) {
673: print $fh $$result;
674: } else {
675: &Apache::lonxml::info('<span class="LC_error">'.
676: &mt("Unable to write to [_1]",
677: '<span class="LC_filename">'.
678: $file.'</span>').
679: '</span>');
680: $error|=4;
681: }
682: }
683: return $error;
684: }
685:
686: sub analyze_header {
687: my ($request) = @_;
688: my $js = &Apache::structuretags::setmode_javascript();
689:
690: # Breadcrumbs
691: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
692: 'text' => 'Construction Space'},
693: {'href' => '',
694: 'text' => 'Problem Testing'},
695: {'href' => '',
696: 'text' => 'Analyzing a problem'}];
697:
698: my $result =
699: &Apache::loncommon::start_page('Analyzing a problem',
700: $js,
701: {'bread_crumbs' => $brcrum,})
702: .&Apache::loncommon::head_subbox(
703: &Apache::loncommon::CSTR_pageheader());
704: $result .=
705: &Apache::lonxml::message_location().'
706: <form name="lonhomework" method="post" action="'.
707: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
708: '<input type="hidden" name="problemmode" value="'.
709: $env{'form.problemmode'}.'" />'.
710: &Apache::structuretags::remember_problem_state().'
711: <div class="LC_edit_problem_analyze_header">
712: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
713: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
714: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
715: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
716: <hr />
717: <input type="button" name="submitmode" value="'.&mt("View").'" '.
718: 'onclick="javascript:setmode(this.form,'."'view'".')" />
719: <hr />
720: </div>
721: </form>';
722: &Apache::lonxml::add_messages(\$result);
723: $request->print($result);
724: $request->rflush();
725: }
726:
727: sub analyze_footer {
728: my ($request) = @_;
729: $request->print(&Apache::loncommon::end_page());
730: $request->rflush();
731: }
732:
733: sub analyze {
734: my ($request,$file) = @_;
735: &Apache::lonxml::debug("Analyze");
736: my $result;
737: my %overall;
738: my %seedexample;
739: my %allparts;
740: my $rndseed=$env{'form.rndseed'};
741: &analyze_header($request);
742: my %prog_state=
743: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
744: &mt('Getting Problem Variants'),
745: $env{'form.numtoanalyze'},
746: 'inline',undef);
747: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
748: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
749: &mt('last problem'));
750: if (&Apache::loncommon::connection_aborted($request)) { return; }
751: my $thisseed=$i+$rndseed;
752: my $subresult=&Apache::lonnet::ssi($request->uri,
753: ('grade_target' => 'analyze'),
754: ('rndseed' => $thisseed));
755: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
756: my %analyze=&Apache::lonnet::str2hash($subresult);
757: my @parts;
758: if (defined(@{ $analyze{'parts'} })) {
759: @parts=@{ $analyze{'parts'} };
760: }
761: foreach my $part (@parts) {
762: if (!exists($allparts{$part})) {$allparts{$part}=1;};
763: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
764: $analyze{$part.'.type'} eq 'stringresponse' ||
765: $analyze{$part.'.type'} eq 'formularesponse' ) {
766: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
767: my $i=0;
768: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
769: push( @{ $overall{$part.'.answer'}[$i] },
770: $answer_part);
771: my $concatanswer= join("\0",@{ $answer_part });
772: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
773: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
774: }
775: $seedexample{join("\0",$part,$i,@{$answer_part})}=
776: $thisseed;
777: $i++;
778: }
779: }
780: if (!keys(%{ $analyze{$part.'.answer'} })) {
781: my $answer_part =
782: ['<span class="LC_error">'.&mt('Error').'</span>'];
783: $seedexample{join("\0",$part,0,@{$answer_part})}=
784: $thisseed;
785: push( @{ $overall{$part.'.answer'}[0] },
786: $answer_part);
787: }
788: }
789: }
790: }
791: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
792: &mt('Analyzing Results'));
793: $request->print('<hr />'
794: .'<h3>'
795: .&mt('List of possible answers')
796: .'</h3>'
797: );
798: foreach my $part (sort(keys(%allparts))) {
799: if (defined(@{ $overall{$part.'.answer'} })) {
800: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
801: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
802: $request->print(&Apache::loncommon::start_data_table()
803: .&Apache::loncommon::start_data_table_header_row()
804: .'<th colspan="'.($num_cols+1).'">'
805: .&mt('Part').' '.$part
806: );
807: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
808: $request->print(' '.&mt('Answer [_1]',$i+1));
809: }
810: $request->print('</th>'
811: .&Apache::loncommon::end_data_table_header_row()
812: );
813: my %frequency;
814: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
815: $frequency{join("\0",@{ $answer })}++;
816: }
817: $request->print(&Apache::loncommon::start_data_table_header_row()
818: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
819: .'<th>'.&mt('Frequency').'<br />'
820: .'('.&mt('click for example').')</th>'
821: .&Apache::loncommon::end_data_table_header_row()
822: );
823: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
824: $request->print(&Apache::loncommon::start_data_table_row()
825: .'<td>'
826: .join('</td><td>',split("\0",$answer))
827: .'</td>'
828: .'<td>'
829: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
830: .'</td>'
831: .&Apache::loncommon::end_data_table_row()
832: );
833: }
834: $request->print(&Apache::loncommon::end_data_table());
835: }
836: } else {
837: $request->print('<p class="LC_warning">'
838: .&mt('Response [_1] is not analyzable at this time.',$part)
839: .'</p>'
840: );
841: }
842: }
843: if (scalar(keys(%allparts)) == 0 ) {
844: $request->print('<p class="LC_warning">'
845: .&mt('Found no analyzable responses in this problem.'
846: .' Currently only Numerical, Formula and String response styles are supported.')
847: .'</p>'
848: );
849: }
850: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
851: &analyze_footer($request);
852: &Apache::lonhomework::showhash(%overall);
853: return $result;
854: }
855:
856: {
857: my $show_problem_status;
858: sub reset_show_problem_status {
859: undef($show_problem_status);
860: }
861:
862: sub set_show_problem_status {
863: my ($new_status) = @_;
864: $show_problem_status = lc($new_status);
865: }
866:
867: sub hide_problem_status {
868: return ($show_problem_status eq 'no'
869: || $show_problem_status eq 'no_feedback_ever');
870: }
871:
872: sub show_problem_status {
873: return ($show_problem_status eq 'yes'
874: || $show_problem_status eq 'answer'
875: || $show_problem_status eq '');
876: }
877:
878: sub show_some_problem_status {
879: return ($show_problem_status eq 'no');
880: }
881:
882: sub show_no_problem_status {
883: return ($show_problem_status eq 'no_feedback_ever');
884: }
885:
886: sub show_answer_problem_status {
887: return ($show_problem_status eq 'answer');
888: }
889: }
890:
891: sub editxmlmode {
892: my ($request,$file) = @_;
893: my $result;
894: my $problem=&Apache::lonnet::getfile($file);
895: if ($problem eq -1) {
896: &Apache::lonxml::error(
897: '<b> '
898: .&mt('Unable to find [_1]',
899: '<span class="LC_filename">'.$file.'</span>')
900: .'</b>');
901:
902: $problem='';
903: }
904:
905: if (($env{'form.problemmode'} eq 'saveeditxml') ||
906: ($env{'form.problemmode'} eq 'saveviewxml') ||
907: ($env{'form.problemmode'} eq 'undoxml')) {
908: my $error=&handle_save_or_undo($request,\$problem,
909: \$env{'form.editxmltext'});
910: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
911: }
912: &Apache::lonhomework::showhashsubset(\%env,'^form');
913: if ($env{'form.problemmode'} eq 'saveviewxml') {
914: &Apache::lonhomework::showhashsubset(\%env,'^form');
915: $env{'form.problemmode'}='view';
916: &renderpage($request,$file);
917: } else {
918: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
919: if ($cols > 80) { $cols = 80; }
920: if ($cols < 70) { $cols = 70; }
921: if ($rows < 20) { $rows = 20; }
922: my $js =
923: &Apache::edit::js_change_detection().
924: &Apache::loncommon::resize_textarea_js().
925: &Apache::structuretags::setmode_javascript().
926: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
927:
928: # Breadcrumbs
929: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
930: 'text' => 'Construction Space'},
931: {'href' => '',
932: 'text' => 'Problem Editing'}];
933:
934: my $start_page =
935: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
936: {'no_auto_mt_title' => 1,
937: 'only_body' => 0,
938: 'add_entries' => {
939: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
940: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
941: },
942: 'bread_crumbs' => $brcrum,
943: });
944:
945: $result=$start_page
946: .&Apache::loncommon::head_subbox(
947: &Apache::loncommon::CSTR_pageheader());
948: $result.=&renderpage($request,$file,['no_output_web'],1).
949: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
950: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
951: &Apache::structuretags::remember_problem_state().'
952: <div class="LC_edit_problem_editxml_header">
953: <table class="LC_edit_problem_header_title"><tr><td>
954: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
955: </td><td align="right">
956: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
957: </td></tr>
958: </table>';
959:
960: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
961: &Apache::structuretags::problem_edit_buttons('editxml');
962:
963: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
964: '<textarea '.&Apache::edit::element_change_detection().
965: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
966: ' name="editxmltext" id="LC_editxmltext">'.
967: &HTML::Entities::encode($problem,'<>&"').'</textarea>
968: <div id="LC_aftertextarea">
969: </div>
970: </form>'.&Apache::loncommon::end_page();
971: &Apache::lonxml::add_messages(\$result);
972: $request->print($result);
973: }
974: return '';
975: }
976:
977: #
978: # Render the page in whatever target desired.
979: #
980: sub renderpage {
981: my ($request,$file,$targets,$return_string) = @_;
982:
983: my @targets = @{$targets || [&get_target()]};
984: &Apache::lonhomework::showhashsubset(\%env,'form.');
985: &Apache::lonxml::debug("Running targets ".join(':',@targets));
986:
987: my $overall_result;
988: foreach my $target (@targets) {
989: # FIXME need to do something intelligent when a problem goes
990: # from viewable to not viewable due to map conditions
991: #&setuppermissions();
992: #if ( $Apache::lonhomework::browse ne '2'
993: # && $Apache::lonhomework::browse ne 'F' ) {
994: # $request->print(" You most likely shouldn't see me.");
995: #}
996: #my $t0 = [&gettimeofday()];
997: my $output=1;
998: if ($target eq 'no_output_web') {
999: $target = 'web'; $output=0;
1000: }
1001: my $problem=&Apache::lonnet::getfile($file);
1002: my $result;
1003: if ($problem eq -1) {
1004: $problem='';
1005: my $filename=(split('/',$file))[-1];
1006: my $error =
1007: "<b> ".&mt('Unable to find [_1]',
1008: '<span class="LC_filename">'.$filename.'</span>')
1009: ."</b>";
1010: $result.=
1011: &Apache::loncommon::simple_error_page($request,'Not available',
1012: $error);
1013: return;
1014: }
1015:
1016: my %mystyle;
1017: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1018: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1019: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1020:
1021: &Apache::lonxml::debug("Should be parsing now");
1022: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1023: &setup_vars($target),%mystyle);
1024: &finished_parsing();
1025: if (!$output) { $result = ''; }
1026: #$request->print("Result follows:");
1027: if ($target eq 'modified') {
1028: &handle_save_or_undo($request,\$problem,\$result);
1029: } else {
1030: if ($target eq 'analyze') {
1031: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1032: undef(%Apache::lonhomework::analyze);
1033: }
1034: #my $td=&tv_interval($t0);
1035: #if ( $Apache::lonxml::debug) {
1036: #$result =~ s:</body>::;
1037: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1038: #}
1039: # $request->print($result);
1040: $overall_result.=$result;
1041: # $request->rflush();
1042: }
1043: #$request->print(":Result ends");
1044: #my $td=&tv_interval($t0);
1045: }
1046: if (!$return_string) {
1047: &Apache::lonxml::add_messages(\$overall_result);
1048: $request->print($overall_result);
1049: $request->rflush();
1050: } else {
1051: return $overall_result;
1052: }
1053: }
1054:
1055: sub finished_parsing {
1056: undef($Apache::lonhomework::parsing_a_problem);
1057: undef($Apache::lonhomework::parsing_a_task);
1058: }
1059:
1060: sub get_template_list {
1061: my ($extension) = @_;
1062: my $result;
1063: my @allnames;
1064: &Apache::lonxml::debug("Looking for :$extension:");
1065: my $glob_extension = $extension;
1066: if ($extension eq 'survey' || $extension eq 'exam') {
1067: $glob_extension = 'problem';
1068: }
1069: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1070: '/templates/*.'.$glob_extension);
1071: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1072: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1073: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1074: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1075: my ($midpoint,$seconddiv,$numfiles);
1076: $numfiles = 0;
1077: foreach my $file (@files) {
1078: next if ($file->[1] !~ /\S/);
1079: $numfiles ++;
1080: }
1081: if ($numfiles > 0) {
1082: $result = '<div class="LC_left_float">';
1083: $midpoint = int($numfiles/2);
1084: if ($numfiles%2) {
1085: $midpoint ++;
1086: }
1087: }
1088: my $count = 0;
1089: my $currentcategory='';
1090: my $first = 1;
1091: foreach my $file (@files) {
1092: next if ($file->[1] !~ /\S/);
1093: if ($file->[2] ne $currentcategory) {
1094: $currentcategory=$file->[2];
1095: if ((!$seconddiv) && ($count >= $midpoint)) {
1096: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1097: $seconddiv = 1;
1098: } elsif (!$first) {
1099: $result.='</div>'."\n";
1100: } else {
1101: $first = 0;
1102: }
1103: $result.= '<div class="LC_Box">'."\n"
1104: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1105: $count++;
1106: }
1107: $result .=
1108: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1109: $file->[1].'</label>';
1110: if ($file->[3]) {
1111: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1112: }
1113: my $filename=$file->[0];
1114: $filename=~s/^\/home\/httpd\/html//;
1115: $result.=' <span class="LC_fontsize_small">'
1116: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1117: .'</span><br />'."\n";
1118: $count ++;
1119: }
1120: if ($numfiles > 0) {
1121: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1122: }
1123: return $result;
1124: }
1125:
1126: sub newproblem {
1127: my ($request) = @_;
1128:
1129: if ($env{'form.template'}) {
1130: my $file = $env{'form.template'};
1131: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1132: &File::Copy::copy($file,$dest);
1133: &renderpage($request,$dest);
1134: return;
1135: }
1136:
1137: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1138: &Apache::lonxml::debug("Looking for :$extension:");
1139: my $templatelist=&get_template_list($extension);
1140: if ($env{'form.newfile'} && !$templatelist) {
1141: # no templates found
1142: my $templatefilename =
1143: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1144: &Apache::lonxml::debug("$templatefilename");
1145: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1146: &File::Copy::copy($templatefilename,$dest);
1147: &renderpage($request,$dest);
1148: } else {
1149: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1150: my $shownurl=$url;
1151: $shownurl=~s-^/~-/priv/-;
1152: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1153: my $errormsg;
1154: my $instructions;
1155: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1156: 'text' => 'Construction Space'},
1157: {'href' => '',
1158: 'text' => "Create New $extension"}];
1159: my $start_page =
1160: &Apache::loncommon::start_page("Create New $extension",
1161: undef,
1162: {'bread_crumbs' => $brcrum,});
1163: $request->print(
1164: $start_page
1165: .&Apache::loncommon::head_subbox(
1166: &Apache::loncommon::CSTR_pageheader())
1167: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1168: $errormsg
1169: ".&mt("The requested file [_1] currently does not exist.",
1170: '<span class="LC_filename">'.$shownurl.'</span>').'
1171: <p class="LC_info">
1172: '.&mt("To create a new $extension, select a template from the".
1173: " list below. Then click on the \"Create $extension\" button.").'
1174: </p><div><form action="'.$url.'" method="post">');
1175:
1176: if (defined($templatelist)) {
1177: $request->print($templatelist);
1178: }
1179: $request->print('<br /><input type="submit" name="newfile" value="'.
1180: &mt("Create $extension").'" />');
1181: $request->print('</form></div>'.&Apache::loncommon::end_page());
1182: }
1183: return;
1184: }
1185:
1186: sub update_construct_style {
1187: if ($env{'request.state'} eq "construct"
1188: && $env{'form.problemmode'} eq 'view'
1189: && defined($env{'form.submitted'})
1190: && !defined($env{'form.resetdata'})
1191: && !defined($env{'form.newrandomization'})) {
1192: if ((!$env{'form.style_file'} && $env{'construct.style'})
1193: ||$env{'form.clear_style_file'}) {
1194: &Apache::lonnet::delenv('construct.style');
1195: } elsif ($env{'form.style_file'}
1196: && $env{'construct.style'} ne $env{'form.style_file'}) {
1197: &Apache::lonnet::appenv({'construct.style' =>
1198: $env{'form.style_file'}});
1199: }
1200: }
1201: }
1202:
1203:
1204: sub handler {
1205: #my $t0 = [&gettimeofday()];
1206: my $request=$_[0];
1207: $Apache::lonxml::request=$request;
1208: $Apache::lonxml::debug=$env{'user.debug'};
1209: $env{'request.uri'}=$request->uri;
1210: &setuppermissions();
1211:
1212: my $file=&Apache::lonnet::filelocation("",$request->uri);
1213:
1214: #check if we know where we are
1215: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1216: # if we are browsing we might not be able to know where we are
1217: if ($Apache::lonhomework::browse ne 'F' &&
1218: $env{'request.state'} ne "construct") {
1219: #should know where we are, so ask
1220: &unset_permissions();
1221: $request->internal_redirect('/adm/ambiguous');
1222: return OK;
1223: }
1224: }
1225: if (&setupheader($request)) {
1226: &unset_permissions();
1227: return OK;
1228: }
1229: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1230: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1231: my ($symb) = &Apache::lonnet::whichuser();
1232: &Apache::lonxml::debug('symb is '.$symb);
1233: if ($env{'request.state'} eq "construct") {
1234: if ( -e $file ) {
1235: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1236: ['problemmode']);
1237: if (!(defined $env{'form.problemmode'})) {
1238: #first visit to problem in construction space
1239: $env{'form.problemmode'}= 'view';
1240: &renderpage($request,$file);
1241: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1242: ($env{'form.problemmode'} eq 'saveeditxml') ||
1243: ($env{'form.problemmode'} eq 'saveviewxml') ||
1244: ($env{'form.problemmode'} eq 'undoxml')) {
1245: &editxmlmode($request,$file);
1246: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1247: &analyze($request,$file);
1248: } else {
1249: &update_construct_style();
1250: &renderpage($request,$file);
1251: }
1252: } else {
1253: # requested file doesn't exist in contruction space
1254: &newproblem($request);
1255: }
1256: } else {
1257: # just render the page normally outside of construction space
1258: &Apache::lonxml::debug("not construct");
1259: &renderpage($request,$file);
1260: }
1261: #my $td=&tv_interval($t0);
1262: #&Apache::lonxml::debug("Spent $td seconds processing");
1263: # always turn off debug messages
1264: $Apache::lonxml::debug=0;
1265: &unset_permissions();
1266: return OK;
1267:
1268: }
1269:
1270: 1;
1271: __END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonhomework.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework