1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.320 2010/07/10 13:51:05 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::drawimage();
51: use Apache::Constants qw(:common);
52: use Apache::loncommon();
53: use Apache::lonlocal;
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use HTML::Entities();
56: use File::Copy();
57:
58: # FIXME - improve commenting
59:
60:
61: BEGIN {
62: &Apache::lonxml::register_insert();
63: }
64:
65:
66: =pod
67:
68: =item set_bubble_lines()
69:
70: Called at analysis time to set the bubble lines
71: hash for the problem.. This should be called in the
72: end_problemtype tag in analysis mode.
73:
74: We fetch the hash of part id counters from lonxml
75: and push them into analyze:{part_id.bubble_lines}.
76:
77: =cut
78:
79: sub set_bubble_lines {
80: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
81:
82: foreach my $key (keys(%bubble_counters)) {
83: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
84: $bubble_counters{"$key"};
85: }
86: }
87:
88: #
89: # Decides what targets to render for.
90: # Implicit inputs:
91: # Various session environment variables:
92: # request.state - published - is a /res/ resource
93: # uploaded - is a /uploaded/ resource
94: # contruct - is a /priv/ resource
95: # form.grade_target - a form parameter requesting a specific target
96: sub get_target {
97: &Apache::lonxml::debug("request.state = $env{'request.state'}");
98: if( defined($env{'form.grade_target'})) {
99: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
100: } else {
101: &Apache::lonxml::debug("form.grade_target <undefined>");
102: }
103: if (($env{'request.state'} eq "published") ||
104: ($env{'request.state'} eq "uploaded")) {
105: if ( defined($env{'form.grade_target'} )
106: && ($env{'form.grade_target'} eq 'tex')) {
107: return ($env{'form.grade_target'});
108: } elsif ( defined($env{'form.grade_target'} )
109: && ($Apache::lonhomework::viewgrades eq 'F' )) {
110: return ($env{'form.grade_target'});
111: } elsif ( $env{'form.grade_target'} eq 'webgrade'
112: && ($Apache::lonhomework::queuegrade eq 'F' )) {
113: return ($env{'form.grade_target'});
114: } elsif ($env{'form.grade_target'} eq 'answer') {
115: if ($env{'form.answer_output_mode'} eq 'tex') {
116: return ($env{'form.grade_target'});
117: }
118: }
119: if ($env{'form.webgrade'} &&
120: ($Apache::lonhomework::modifygrades eq 'F'
121: || $Apache::lonhomework::queuegrade eq 'F' )) {
122: return ('grade','webgrade');
123: }
124: if ( defined($env{'form.submitted'}) &&
125: ( !defined($env{'form.newrandomization'}))) {
126: return ('grade', 'web');
127: } else {
128: return ('web');
129: }
130: } elsif ($env{'request.state'} eq "construct") {
131: if ( defined($env{'form.grade_target'}) ) {
132: return ($env{'form.grade_target'});
133: }
134: if ( defined($env{'form.preview'})) {
135: if ( defined($env{'form.submitted'})) {
136: return ('grade', 'web');
137: } else {
138: return ('web');
139: }
140: } else {
141: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
142: #$env{'form.webgrade'} = 'yes';
143: return ('grade','webgrade','answer');
144: } elsif (($env{'form.problemmode'} eq 'view') ||
145: ($env{'form.problemmode'} eq 'discard')) {
146: if ( defined($env{'form.submitted'}) &&
147: (!defined($env{'form.resetdata'})) &&
148: (!defined($env{'form.newrandomization'}))) {
149: return ('grade', 'web','answer');
150: } else {
151: return ('web','answer');
152: }
153: } elsif ($env{'form.problemmode'} eq 'edit') {
154: if ( $env{'form.submitted'} eq 'edit' ) {
155: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
156: return ('modified','web','answer');
157: } else {
158: return ('modified','no_output_web','edit');
159: }
160: } else {
161: return ('no_output_web','edit');
162: }
163: } else {
164: return ('web');
165: }
166: }
167: }
168: return ();
169: }
170:
171: sub setup_vars {
172: my ($target) = @_;
173: return ';'
174: # return ';$external::target='.$target.';';
175: }
176:
177: sub proctor_checked_in {
178: my ($slot_name,$slot,$type)=@_;
179: my @possible_proctors=split(",",$slot->{'proctor'});
180:
181: return 1 if (!@possible_proctors);
182:
183: my $key;
184: if ($type eq 'Task') {
185: my $version=$Apache::lonhomework::history{'resource.0.version'};
186: $key ="resource.$version.0.checkedin";
187: } elsif ($type eq 'problem') {
188: $key ='resource.0.checkedin';
189: }
190: # backward compatability, used to be username@domain,
191: # now is username:domain
192: my $who = $Apache::lonhomework::history{$key};
193: if ($who !~ /:/) {
194: $who =~ tr/@/:/;
195: }
196: foreach my $possible (@possible_proctors) {
197: if ($who eq $possible
198: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
199: return 1;
200: }
201: }
202:
203: return 0;
204: }
205:
206: sub check_slot_access {
207: my ($id,$type)=@_;
208:
209: # does it pass normal muster
210: my ($status,$datemsg)=&check_access($id);
211:
212: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
213: if ($useslots ne 'resource' && $useslots ne 'map'
214: && $useslots ne 'map_map') {
215: return ($status,$datemsg);
216: }
217:
218: if ($status eq 'SHOW_ANSWER' ||
219: $status eq 'CLOSED' ||
220: $status eq 'INVALID_ACCESS' ||
221: $status eq 'UNAVAILABLE') {
222: return ($status,$datemsg);
223: }
224: if ($env{'request.state'} eq "construct") {
225: return ($status,$datemsg);
226: }
227:
228: if ($type eq 'Task') {
229: my $version=$Apache::lonhomework::history{'resource.version'};
230: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
231: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
232: return ('SHOW_ANSWER');
233: }
234: }
235:
236: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
237: my $available = &Apache::lonnet::EXT("resource.0.available");
238: my @slots= (split(':',$availablestudent),split(':',$available));
239:
240: # if (!@slots) {
241: # return ($status,$datemsg);
242: # }
243: my $slotstatus='NOT_IN_A_SLOT';
244: my ($returned_slot,$slot_name);
245: foreach my $slot (@slots) {
246: $slot =~ s/(^\s*|\s*$)//g;
247: &Apache::lonxml::debug("getting $slot");
248: my %slot=&Apache::lonnet::get_slot($slot);
249: &Apache::lonhomework::showhash(%slot);
250: if ($slot{'starttime'} < time &&
251: $slot{'endtime'} > time &&
252: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
253: &Apache::lonxml::debug("$slot is good");
254: $slotstatus='NEEDS_CHECKIN';
255: $returned_slot=\%slot;
256: $slot_name=$slot;
257: last;
258: }
259: }
260: if ($slotstatus eq 'NEEDS_CHECKIN' &&
261: &proctor_checked_in($slot_name,$returned_slot,$type)) {
262: &Apache::lonxml::debug("protoctor checked in");
263: $slotstatus='CAN_ANSWER';
264: }
265:
266: my ($is_correct,$got_grade,$checkedin);
267: if ($type eq 'Task') {
268: my $version=$Apache::lonhomework::history{'resource.0.version'};
269: $got_grade =
270: ($Apache::lonhomework::history{"resource.$version.0.status"}
271: =~ /^(?:pass|fail)$/);
272: $is_correct =
273: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
274: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
275: $checkedin =
276: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
277: } elsif ($type eq 'problem') {
278: $got_grade = 1;
279: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
280: $is_correct =
281: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
282: }
283:
284: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
285:
286: # no slot is currently open, and has been checked in for this version
287: # but hasn't got a grade, therefore must be awaiting a grade
288: if (!defined($slot_name)
289: && $checkedin
290: && !$got_grade) {
291: return ('WAITING_FOR_GRADE');
292: }
293:
294: # Previously used slot is no longer open, and has been checked in for this version.
295: # However, the problem is not closed, and potentially, another slot might be
296: # used to gain access to it to work on it, until the due date is reached, and the
297: # problem then becomes CLOSED. Therefore return the slotstatus -
298: # (which will be NOT_IN_SLOT).
299: if (!defined($slot_name)
300: && $checkedin
301: && $type eq 'problem') {
302: return ($slotstatus);
303: }
304:
305: if ($slotstatus eq 'NOT_IN_A_SLOT'
306: && $checkedin ) {
307:
308: if ($got_grade) {
309: return ('SHOW_ANSWER');
310: } else {
311: return ('WAITING_FOR_GRADE');
312: }
313:
314: }
315:
316: if ( $is_correct) {
317: if ($type eq 'problem') {
318: return ($status);
319: }
320: return ('SHOW_ANSWER');
321: }
322:
323: if ( $status eq 'CANNOT_ANSWER' &&
324: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
325: return ($status,$datemsg);
326: }
327:
328: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
329: }
330:
331: # JB, 9/24/2002: Any changes in this function may require a change
332: # in lonnavmaps::resource::getDateStatus.
333: sub check_access {
334: my ($id) = @_;
335: my $date ='';
336: my $status;
337: my $datemsg = '';
338: my $lastdate = '';
339: my $type;
340: my $passed;
341:
342: if ($env{'request.state'} eq "construct") {
343: if ($env{'form.problemstate'}) {
344: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
345: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
346: && &hide_problem_status())) {
347: return ('CANNOT_ANSWER',
348: &mt('is in this state due to author settings.'));
349: }
350: } else {
351: return ($env{'form.problemstate'},
352: &mt('is in this state due to author settings.'));
353: }
354: }
355: &Apache::lonxml::debug("in construction ignoring dates");
356: $status='CAN_ANSWER';
357: $datemsg=&mt('is in under construction');
358: # return ($status,$datemsg);
359: }
360:
361: &Apache::lonxml::debug("checking for part :$id:");
362: &Apache::lonxml::debug("time:".time);
363:
364: my ($symb)=&Apache::lonnet::whichuser();
365: &Apache::lonxml::debug("symb:".$symb);
366: #if ($env{'request.state'} ne "construct" && $symb ne '') {
367: if ($env{'request.state'} ne "construct") {
368: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
369: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
370: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
371: $status='INVALID_ACCESS';
372: $date=&mt("can not be accessed from your location.");
373: return($status,$date);
374: }
375:
376: foreach my $temp ("opendate","duedate","answerdate") {
377: $lastdate = $date;
378: if ($temp eq 'duedate') {
379: $date = &due_date($id);
380: } else {
381: $date = &Apache::lonnet::EXT("resource.$id.$temp");
382: }
383:
384: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
385: if ($thistype =~ /^(con_lost|no_such_host)/ ||
386: $date =~ /^(con_lost|no_such_host)/) {
387: $status='UNAVAILABLE';
388: $date=&mt("may open later.");
389: return($status,$date);
390: }
391: if ($thistype eq 'date_interval') {
392: if ($temp eq 'opendate') {
393: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
394: }
395: if ($temp eq 'answerdate') {
396: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
397: }
398: }
399: &Apache::lonxml::debug("found :$date: for :$temp:");
400: if ($date eq '') {
401: $date = &mt("an unknown date"); $passed = 0;
402: } elsif ($date eq 'con_lost') {
403: $date = &mt("an indeterminate date"); $passed = 0;
404: } else {
405: if (time < $date) { $passed = 0; } else { $passed = 1; }
406: $date = &Apache::lonlocal::locallocaltime($date);
407: }
408: if (!$passed) { $type=$temp; last; }
409: }
410: &Apache::lonxml::debug("have :$type:$passed:");
411: if ($passed) {
412: $status='SHOW_ANSWER';
413: $datemsg=$date;
414: } elsif ($type eq 'opendate') {
415: $status='CLOSED';
416: $datemsg = &mt("will open on")." $date";
417: } elsif ($type eq 'duedate') {
418: $status='CAN_ANSWER';
419: $datemsg = &mt("is due at")." $date";
420: } elsif ($type eq 'answerdate') {
421: $status='CLOSED';
422: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
423: }
424: }
425: if ($status eq 'CAN_ANSWER' ||
426: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
427: #check #tries, and if correct.
428: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
429: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
430: if ( $tries eq '' ) { $tries = '0'; }
431: if ( $maxtries eq '' &&
432: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
433: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
434: # if (correct and show prob status) or excused then CANNOT_ANSWER
435: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
436: &&
437: &show_problem_status())
438: ||
439: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
440: $status = 'CANNOT_ANSWER';
441: }
442: if ($status eq 'CANNOT_ANSWER'
443: && &show_answer_problem_status()) {
444: $status = 'SHOW_ANSWER';
445: }
446: }
447: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
448: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
449: &Apache::lonxml::debug("looking for interval @interval");
450: if ($interval[0]) {
451: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
452: &Apache::lonxml::debug("looking for accesstime $first_access");
453: if (!$first_access) {
454: $status='NOT_YET_VIEWED';
455: my $due_date = &due_date($id);
456: my $seconds_left = $due_date - time;
457: if ($seconds_left > $interval[0] || $due_date eq '') {
458: $seconds_left = $interval[0];
459: }
460: $datemsg=&seconds_to_human_length($seconds_left);
461: }
462: }
463: }
464:
465: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
466: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
467: # return ('UNCHECKEDOUT','needs to be checked out');
468: #}
469:
470:
471: &Apache::lonxml::debug("sending back :$status:$datemsg:");
472: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
473: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
474: $status='CAN_ANSWER';
475: $datemsg=&mt('is closed but you are allowed to view it');
476: }
477:
478: return ($status,$datemsg);
479: }
480: # this should work exactly like the copy in lonnavmaps.pm
481: sub due_date {
482: my ($part_id,$symb,$udom,$uname)=@_;
483: my $date;
484: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
485: $udom,$uname);
486: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
487: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
488: $udom,$uname);
489: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
490: if ($interval[0] =~ /\d+/) {
491: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
492: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
493: if (defined($first_access)) {
494: my $interval = $first_access+$interval[0];
495: $date = (!$due_date || $interval < $due_date) ? $interval
496: : $due_date;
497: } else {
498: $date = $due_date;
499: }
500: } else {
501: $date = $due_date;
502: }
503: return $date
504: }
505:
506: sub seconds_to_human_length {
507: my ($length)=@_;
508:
509: my $seconds=$length%60; $length=int($length/60);
510: my $minutes=$length%60; $length=int($length/60);
511: my $hours=$length%24; $length=int($length/24);
512: my $days=$length;
513:
514: my $timestr;
515: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
516: if ($hours > 0) { $timestr.=($timestr?", ":"").
517: &mt('[quant,_1,hour]',$hours); }
518: if ($minutes > 0) { $timestr.=($timestr?", ":"").
519: &mt('[quant,_1,minute]',$minutes); }
520: if ($seconds > 0) { $timestr.=($timestr?", ":"").
521: &mt('[quant,_1,second]',$seconds); }
522: return $timestr;
523: }
524:
525: sub showhash {
526: my (%hash) = @_;
527: &showhashsubset(\%hash,'.');
528: return '';
529: }
530:
531: sub showarray {
532: my ($array)=@_;
533: my $string="(";
534: foreach my $elm (@{ $array }) {
535: if (ref($elm) eq 'ARRAY') {
536: $string.=&showarray($elm);
537: } elsif (ref($elm) eq 'HASH') {
538: $string.= "HASH --- \n<br />";
539: $string.= &showhashsubset($elm,'.');
540: } else {
541: $string.="$elm,"
542: }
543: }
544: chop($string);
545: $string.=")";
546: return $string;
547: }
548:
549: sub showhashsubset {
550: my ($hash,$keyre) = @_;
551: my $resultkey;
552: foreach $resultkey (sort keys %$hash) {
553: if ($resultkey !~ /$keyre/) { next; }
554: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
555: &Apache::lonxml::debug("$resultkey ---- ".
556: &showarray($$hash{$resultkey}));
557: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
558: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
559: &showhashsubset($$hash{$resultkey},'.');
560: } else {
561: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
562: }
563: }
564: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
565: return '';
566: }
567:
568: sub setuppermissions {
569: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
570: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
571: if (! $viewgrades &&
572: exists($env{'request.course.sec'}) &&
573: $env{'request.course.sec'} !~ /^\s*$/) {
574: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
575: '/'.$env{'request.course.sec'});
576: }
577: $Apache::lonhomework::viewgrades = $viewgrades;
578:
579: if ($Apache::lonhomework::browse eq 'F' &&
580: $env{'form.devalidatecourseresdata'} eq 'on') {
581: my (undef,$courseid) = &Apache::lonnet::whichuser();
582: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
583: $env{"course.$courseid.domain"});
584: }
585:
586: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
587: if (! $modifygrades &&
588: exists($env{'request.course.sec'}) &&
589: $env{'request.course.sec'} !~ /^\s*$/) {
590: $modifygrades =
591: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
592: '/'.$env{'request.course.sec'});
593: }
594: $Apache::lonhomework::modifygrades = $modifygrades;
595:
596: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
597: if (! $queuegrade &&
598: exists($env{'request.course.sec'}) &&
599: $env{'request.course.sec'} !~ /^\s*$/) {
600: $queuegrade =
601: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
602: '/'.$env{'request.course.sec'});
603: }
604: $Apache::lonhomework::queuegrade = $queuegrade;
605: return '';
606: }
607:
608: sub unset_permissions {
609: undef($Apache::lonhomework::queuegrade);
610: undef($Apache::lonhomework::modifygrades);
611: undef($Apache::lonhomework::viewgrades);
612: undef($Apache::lonhomework::browse);
613: }
614:
615: sub setupheader {
616: my $request=$_[0];
617: &Apache::loncommon::content_type($request,'text/html');
618: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
619: &Apache::loncommon::no_cache($request);
620: }
621: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
622: # 'lastrevisiondate'));
623: $request->send_http_header;
624: return OK if $request->header_only;
625: return ''
626: }
627:
628: sub handle_save_or_undo {
629: my ($request,$problem,$result) = @_;
630: my $file = &Apache::lonnet::filelocation("",$request->uri);
631: my $filebak =$file.".bak";
632: my $filetmp =$file.".tmp";
633: my $error=0;
634: if ($env{'form.Undo'} eq &mt('undo')) {
635: my $error=0;
636: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
637: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
638: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
639: if (!$error) {
640: &Apache::lonxml::info("<p><b>".
641: &mt("Undid changes, Switched [_1] and [_2]",
642: '<span class="LC_filename">'.$filebak.
643: '</span>',
644: '<span class="LC_filename">'.$file.
645: '</span>')."</b></p>");
646: } else {
647: &Apache::lonxml::info("<p><span class=\"LC_error\">".
648: &mt("Unable to undo, unable to switch [_1] and [_2]",
649: '<span class="LC_filename">'.
650: $filebak.'</span>',
651: '<span class="LC_filename">'.
652: $file.'</span>')."</span></p>");
653: $error=1;
654: }
655: } else {
656: &Apache::lonnet::correct_line_ends($result);
657: my $fs=Apache::File->new(">$filebak");
658: if (defined($fs)) {
659: print $fs $$problem;
660: } else {
661: &Apache::lonxml::info("<span class=\"LC_error\">".
662: &mt("Unable to make backup [_1]",
663: '<span class="LC_filename">'.
664: $filebak.'</span>')."</span>");
665: $error=2;
666: }
667: my $fh=Apache::File->new(">$file");
668: if (defined($fh)) {
669: print $fh $$result;
670: } else {
671: &Apache::lonxml::info('<span class="LC_error">'.
672: &mt("Unable to write to [_1]",
673: '<span class="LC_filename">'.
674: $file.'</span>').
675: '</span>');
676: $error|=4;
677: }
678: }
679: return $error;
680: }
681:
682: sub analyze_header {
683: my ($request) = @_;
684: my $js = &Apache::structuretags::setmode_javascript();
685:
686: # Breadcrumbs
687: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
688: 'text' => 'Construction Space'},
689: {'href' => '',
690: 'text' => 'Problem Testing'},
691: {'href' => '',
692: 'text' => 'Analyzing a problem'}];
693:
694: my $result =
695: &Apache::loncommon::start_page('Analyzing a problem',
696: $js,
697: {'bread_crumbs' => $brcrum,})
698: .&Apache::loncommon::head_subbox(
699: &Apache::loncommon::CSTR_pageheader());
700: $result .=
701: &Apache::lonxml::message_location().'
702: <form name="lonhomework" method="post" action="'.
703: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
704: '<input type="hidden" name="problemmode" value="'.
705: $env{'form.problemmode'}.'" />'.
706: &Apache::structuretags::remember_problem_state().'
707: <div class="LC_edit_problem_analyze_header">
708: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
709: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
710: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
711: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
712: <hr />
713: <input type="button" name="submitmode" value="'.&mt("View").'" '.
714: 'onclick="javascript:setmode(this.form,'."'view'".')" />
715: <hr />
716: </div>
717: </form>';
718: &Apache::lonxml::add_messages(\$result);
719: $request->print($result);
720: $request->rflush();
721: }
722:
723: sub analyze_footer {
724: my ($request) = @_;
725: $request->print(&Apache::loncommon::end_page());
726: $request->rflush();
727: }
728:
729: sub analyze {
730: my ($request,$file) = @_;
731: &Apache::lonxml::debug("Analyze");
732: my $result;
733: my %overall;
734: my %seedexample;
735: my %allparts;
736: my $rndseed=$env{'form.rndseed'};
737: &analyze_header($request);
738: my %prog_state=
739: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
740: &mt('Getting Problem Variants'),
741: $env{'form.numtoanalyze'},
742: 'inline',undef);
743: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
744: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
745: &mt('last problem'));
746: if (&Apache::loncommon::connection_aborted($request)) { return; }
747: my $thisseed=$i+$rndseed;
748: my $subresult=&Apache::lonnet::ssi($request->uri,
749: ('grade_target' => 'analyze'),
750: ('rndseed' => $thisseed));
751: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
752: my %analyze=&Apache::lonnet::str2hash($subresult);
753: my @parts;
754: if (defined(@{ $analyze{'parts'} })) {
755: @parts=@{ $analyze{'parts'} };
756: }
757: foreach my $part (@parts) {
758: if (!exists($allparts{$part})) {$allparts{$part}=1;};
759: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
760: $analyze{$part.'.type'} eq 'stringresponse' ||
761: $analyze{$part.'.type'} eq 'formularesponse' ) {
762: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
763: my $i=0;
764: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
765: push( @{ $overall{$part.'.answer'}[$i] },
766: $answer_part);
767: my $concatanswer= join("\0",@{ $answer_part });
768: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
769: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
770: }
771: $seedexample{join("\0",$part,$i,@{$answer_part})}=
772: $thisseed;
773: $i++;
774: }
775: }
776: if (!keys(%{ $analyze{$part.'.answer'} })) {
777: my $answer_part =
778: ['<span class="LC_error">'.&mt('Error').'</span>'];
779: $seedexample{join("\0",$part,0,@{$answer_part})}=
780: $thisseed;
781: push( @{ $overall{$part.'.answer'}[0] },
782: $answer_part);
783: }
784: }
785: }
786: }
787: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
788: &mt('Analyzing Results'));
789: $request->print('<hr />'
790: .'<h3>'
791: .&mt('List of possible answers')
792: .'</h3>'
793: );
794: foreach my $part (sort(keys(%allparts))) {
795: if (defined(@{ $overall{$part.'.answer'} })) {
796: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
797: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
798: $request->print(&Apache::loncommon::start_data_table()
799: .&Apache::loncommon::start_data_table_header_row()
800: .'<th colspan="'.($num_cols+1).'">'
801: .&mt('Part').' '.$part
802: );
803: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
804: $request->print(' '.&mt('Answer [_1]',$i+1));
805: }
806: $request->print('</th>'
807: .&Apache::loncommon::end_data_table_header_row()
808: );
809: my %frequency;
810: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
811: $frequency{join("\0",@{ $answer })}++;
812: }
813: $request->print(&Apache::loncommon::start_data_table_header_row()
814: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
815: .'<th>'.&mt('Frequency').'<br />'
816: .'('.&mt('click for example').')</th>'
817: .&Apache::loncommon::end_data_table_header_row()
818: );
819: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
820: $request->print(&Apache::loncommon::start_data_table_row()
821: .'<td>'
822: .join('</td><td>',split("\0",$answer))
823: .'</td>'
824: .'<td>'
825: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
826: .'</td>'
827: .&Apache::loncommon::end_data_table_row()
828: );
829: }
830: $request->print(&Apache::loncommon::end_data_table());
831: }
832: } else {
833: $request->print('<p class="LC_warning">'
834: .&mt('Response [_1] is not analyzable at this time.',$part)
835: .'</p>'
836: );
837: }
838: }
839: if (scalar(keys(%allparts)) == 0 ) {
840: $request->print('<p class="LC_warning">'
841: .&mt('Found no analyzable responses in this problem.'
842: .' Currently only Numerical, Formula and String response styles are supported.')
843: .'</p>'
844: );
845: }
846: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
847: &analyze_footer($request);
848: &Apache::lonhomework::showhash(%overall);
849: return $result;
850: }
851:
852: {
853: my $show_problem_status;
854: sub reset_show_problem_status {
855: undef($show_problem_status);
856: }
857:
858: sub set_show_problem_status {
859: my ($new_status) = @_;
860: $show_problem_status = lc($new_status);
861: }
862:
863: sub hide_problem_status {
864: return ($show_problem_status eq 'no'
865: || $show_problem_status eq 'no_feedback_ever');
866: }
867:
868: sub show_problem_status {
869: return ($show_problem_status eq 'yes'
870: || $show_problem_status eq 'answer'
871: || $show_problem_status eq '');
872: }
873:
874: sub show_some_problem_status {
875: return ($show_problem_status eq 'no');
876: }
877:
878: sub show_no_problem_status {
879: return ($show_problem_status eq 'no_feedback_ever');
880: }
881:
882: sub show_answer_problem_status {
883: return ($show_problem_status eq 'answer');
884: }
885: }
886:
887: sub editxmlmode {
888: my ($request,$file) = @_;
889: my $result;
890: my $problem=&Apache::lonnet::getfile($file);
891: if ($problem eq -1) {
892: &Apache::lonxml::error(
893: '<b> '
894: .&mt('Unable to find [_1]',
895: '<span class="LC_filename">'.$file.'</span>')
896: .'</b>');
897:
898: $problem='';
899: }
900: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
901: my $error=&handle_save_or_undo($request,\$problem,
902: \$env{'form.editxmltext'});
903: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
904: }
905: &Apache::lonhomework::showhashsubset(\%env,'^form');
906: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
907: &Apache::lonhomework::showhashsubset(\%env,'^form');
908: $env{'form.problemmode'}='view';
909: &renderpage($request,$file);
910: } else {
911: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
912: if ($cols > 80) { $cols = 80; }
913: if ($cols < 70) { $cols = 70; }
914: if ($rows < 20) { $rows = 20; }
915: my $js =
916: &Apache::edit::js_change_detection().
917: &Apache::loncommon::resize_textarea_js().
918: &Apache::structuretags::setmode_javascript().
919: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
920: my $dragmath_button =
921: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
922:
923: # Breadcrumbs
924: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
925: 'text' => 'Construction Space'},
926: {'href' => '',
927: 'text' => 'Problem Editing'}];
928:
929: my $start_page =
930: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
931: {'no_auto_mt_title' => 1,
932: 'only_body' => 0,
933: 'add_entries' => {
934: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
935: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
936: },
937: 'bread_crumbs' => $brcrum,
938: });
939:
940: $result=$start_page
941: .&Apache::loncommon::head_subbox(
942: &Apache::loncommon::CSTR_pageheader());
943: $result.=&renderpage($request,$file,['no_output_web'],1).
944: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
945: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
946: &Apache::structuretags::remember_problem_state().'
947: <div class="LC_edit_problem_editxml_header">
948: <table class="LC_edit_problem_header_title"><tr><td>
949: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
950: </td><td align="right">
951: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
952: </td></tr>
953: </table>
954: <div class="LC_edit_problem_discards">
955: <input type="hidden" name="problemmode" value="editxml" />
956:
957: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
958: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
959: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
960: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
961: '.$dragmath_button.'
962: </div>
963: <div class="LC_edit_problem_saves">
964: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
965: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
966: </div>
967: <hr style="clear:both;" />
968: '.&Apache::lonxml::message_location().'
969: </div>
970: ' . '
971: <textarea '.&Apache::edit::element_change_detection().
972: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
973: ' name="editxmltext" id="LC_editxmltext">'.
974: &HTML::Entities::encode($problem,'<>&"').'</textarea>
975: <div id="LC_aftertextarea">
976: </div>
977: </form>'.&Apache::loncommon::end_page();
978: &Apache::lonxml::add_messages(\$result);
979: $request->print($result);
980: }
981: return '';
982: }
983:
984: #
985: # Render the page in whatever target desired.
986: #
987: sub renderpage {
988: my ($request,$file,$targets,$return_string) = @_;
989:
990: my @targets = @{$targets || [&get_target()]};
991: &Apache::lonhomework::showhashsubset(\%env,'form.');
992: &Apache::lonxml::debug("Running targets ".join(':',@targets));
993:
994: my $overall_result;
995: foreach my $target (@targets) {
996: # FIXME need to do something intelligent when a problem goes
997: # from viewable to not viewable due to map conditions
998: #&setuppermissions();
999: #if ( $Apache::lonhomework::browse ne '2'
1000: # && $Apache::lonhomework::browse ne 'F' ) {
1001: # $request->print(" You most likely shouldn't see me.");
1002: #}
1003: #my $t0 = [&gettimeofday()];
1004: my $output=1;
1005: if ($target eq 'no_output_web') {
1006: $target = 'web'; $output=0;
1007: }
1008: my $problem=&Apache::lonnet::getfile($file);
1009: my $result;
1010: if ($problem eq -1) {
1011: $problem='';
1012: my $filename=(split('/',$file))[-1];
1013: my $error =
1014: "<b> ".&mt('Unable to find [_1]',
1015: '<span class="LC_filename">'.$filename.'</span>')
1016: ."</b>";
1017: $result.=
1018: &Apache::loncommon::simple_error_page($request,'Not available',
1019: $error);
1020: return;
1021: }
1022:
1023: my %mystyle;
1024: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1025: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1026: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1027:
1028: &Apache::lonxml::debug("Should be parsing now");
1029: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1030: &setup_vars($target),%mystyle);
1031: &finished_parsing();
1032: if (!$output) { $result = ''; }
1033: #$request->print("Result follows:");
1034: if ($target eq 'modified') {
1035: &handle_save_or_undo($request,\$problem,\$result);
1036: } else {
1037: if ($target eq 'analyze') {
1038: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1039: undef(%Apache::lonhomework::analyze);
1040: }
1041: #my $td=&tv_interval($t0);
1042: #if ( $Apache::lonxml::debug) {
1043: #$result =~ s:</body>::;
1044: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1045: #}
1046: # $request->print($result);
1047: $overall_result.=$result;
1048: # $request->rflush();
1049: }
1050: #$request->print(":Result ends");
1051: #my $td=&tv_interval($t0);
1052: }
1053: if (!$return_string) {
1054: &Apache::lonxml::add_messages(\$overall_result);
1055: $request->print($overall_result);
1056: $request->rflush();
1057: } else {
1058: return $overall_result;
1059: }
1060: }
1061:
1062: sub finished_parsing {
1063: undef($Apache::lonhomework::parsing_a_problem);
1064: undef($Apache::lonhomework::parsing_a_task);
1065: }
1066:
1067: sub get_template_list {
1068: my ($extension) = @_;
1069: my $result;
1070: my @allnames;
1071: &Apache::lonxml::debug("Looking for :$extension:");
1072: my $glob_extension = $extension;
1073: if ($extension eq 'survey' || $extension eq 'exam') {
1074: $glob_extension = 'problem';
1075: }
1076: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1077: '/templates/*.'.$glob_extension);
1078: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1079: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1080: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1081: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1082: my ($midpoint,$seconddiv,$numfiles);
1083: $numfiles = 0;
1084: foreach my $file (@files) {
1085: next if ($file->[1] !~ /\S/);
1086: $numfiles ++;
1087: }
1088: if ($numfiles > 0) {
1089: $result = '<div class="LC_left_float">';
1090: $midpoint = int($numfiles/2);
1091: if ($numfiles%2) {
1092: $midpoint ++;
1093: }
1094: }
1095: my $count = 0;
1096: my $currentcategory='';
1097: my $first = 1;
1098: foreach my $file (@files) {
1099: next if ($file->[1] !~ /\S/);
1100: if ($file->[2] ne $currentcategory) {
1101: $currentcategory=$file->[2];
1102: if ((!$seconddiv) && ($count >= $midpoint)) {
1103: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1104: $seconddiv = 1;
1105: } elsif (!$first) {
1106: $result.='</div>'."\n";
1107: } else {
1108: $first = 0;
1109: }
1110: $result.= '<div class="LC_Box">'."\n"
1111: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1112: $count++;
1113: }
1114: $result .=
1115: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1116: $file->[1].'</label>';
1117: if ($file->[3]) {
1118: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1119: }
1120: my $filename=$file->[0];
1121: $filename=~s/^\/home\/httpd\/html//;
1122: $result.=' <span class="LC_fontsize_small">'
1123: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1124: .'</span><br />'."\n";
1125: $count ++;
1126: }
1127: if ($numfiles > 0) {
1128: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1129: }
1130: return $result;
1131: }
1132:
1133: sub newproblem {
1134: my ($request) = @_;
1135:
1136: if ($env{'form.template'}) {
1137: my $file = $env{'form.template'};
1138: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1139: &File::Copy::copy($file,$dest);
1140: &renderpage($request,$dest);
1141: return;
1142: }
1143:
1144: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1145: &Apache::lonxml::debug("Looking for :$extension:");
1146: my $templatelist=&get_template_list($extension);
1147: if ($env{'form.newfile'} && !$templatelist) {
1148: # no templates found
1149: my $templatefilename =
1150: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1151: &Apache::lonxml::debug("$templatefilename");
1152: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1153: &File::Copy::copy($templatefilename,$dest);
1154: &renderpage($request,$dest);
1155: } else {
1156: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1157: my $shownurl=$url;
1158: $shownurl=~s-^/~-/priv/-;
1159: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1160: my $errormsg;
1161: my $instructions;
1162: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1163: 'text' => 'Construction Space'},
1164: {'href' => '',
1165: 'text' => "Create New $extension"}];
1166: my $start_page =
1167: &Apache::loncommon::start_page("Create New $extension",
1168: undef,
1169: {'bread_crumbs' => $brcrum,});
1170: $request->print(
1171: $start_page
1172: .&Apache::loncommon::head_subbox(
1173: &Apache::loncommon::CSTR_pageheader())
1174: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1175: $errormsg
1176: ".&mt("The requested file [_1] currently does not exist.",
1177: '<span class="LC_filename">'.$shownurl.'</span>').'
1178: <p class="LC_info">
1179: '.&mt("To create a new $extension, select a template from the".
1180: " list below. Then click on the \"Create $extension\" button.").'
1181: </p><div><form action="'.$url.'" method="post">');
1182:
1183: if (defined($templatelist)) {
1184: $request->print($templatelist);
1185: }
1186: $request->print('<br /><input type="submit" name="newfile" value="'.
1187: &mt("Create $extension").'" />');
1188: $request->print('</form></div>'.&Apache::loncommon::end_page());
1189: }
1190: return;
1191: }
1192:
1193: sub update_construct_style {
1194: if ($env{'request.state'} eq "construct"
1195: && $env{'form.problemmode'} eq 'view'
1196: && defined($env{'form.submitted'})
1197: && !defined($env{'form.resetdata'})
1198: && !defined($env{'form.newrandomization'})) {
1199: if ((!$env{'form.style_file'} && $env{'construct.style'})
1200: ||$env{'form.clear_style_file'}) {
1201: &Apache::lonnet::delenv('construct.style');
1202: } elsif ($env{'form.style_file'}
1203: && $env{'construct.style'} ne $env{'form.style_file'}) {
1204: &Apache::lonnet::appenv({'construct.style' =>
1205: $env{'form.style_file'}});
1206: }
1207: }
1208: }
1209:
1210:
1211: sub handler {
1212: #my $t0 = [&gettimeofday()];
1213: my $request=$_[0];
1214: $Apache::lonxml::request=$request;
1215: $Apache::lonxml::debug=$env{'user.debug'};
1216: $env{'request.uri'}=$request->uri;
1217: &setuppermissions();
1218:
1219: my $file=&Apache::lonnet::filelocation("",$request->uri);
1220:
1221: #check if we know where we are
1222: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1223: # if we are browsing we might not be able to know where we are
1224: if ($Apache::lonhomework::browse ne 'F' &&
1225: $env{'request.state'} ne "construct") {
1226: #should know where we are, so ask
1227: &unset_permissions();
1228: $request->internal_redirect('/adm/ambiguous');
1229: return OK;
1230: }
1231: }
1232: if (&setupheader($request)) {
1233: &unset_permissions();
1234: return OK;
1235: }
1236: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1237: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1238: my ($symb) = &Apache::lonnet::whichuser();
1239: &Apache::lonxml::debug('symb is '.$symb);
1240: if ($env{'request.state'} eq "construct") {
1241: if ( -e $file ) {
1242: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1243: ['problemmode']);
1244: if (!(defined $env{'form.problemmode'})) {
1245: #first visit to problem in construction space
1246: $env{'form.problemmode'}= 'view';
1247: &renderpage($request,$file);
1248: } elsif ($env{'form.problemmode'} eq 'editxml') {
1249: &editxmlmode($request,$file);
1250: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1251: &analyze($request,$file);
1252: } else {
1253: &update_construct_style();
1254: &renderpage($request,$file);
1255: }
1256: } else {
1257: # requested file doesn't exist in contruction space
1258: &newproblem($request);
1259: }
1260: } else {
1261: # just render the page normally outside of construction space
1262: &Apache::lonxml::debug("not construct");
1263: &renderpage($request,$file);
1264: }
1265: #my $td=&tv_interval($t0);
1266: #&Apache::lonxml::debug("Spent $td seconds processing");
1267: # always turn off debug messages
1268: $Apache::lonxml::debug=0;
1269: &unset_permissions();
1270: return OK;
1271:
1272: }
1273:
1274: 1;
1275: __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