1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.317.4.4 2011/10/06 12:32:52 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27:
28:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::functionplotresponse();
51: use Apache::drawimage();
52: use Apache::Constants qw(:common);
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use HTML::Entities();
57: use File::Copy();
58:
59: # FIXME - improve commenting
60:
61:
62: BEGIN {
63: &Apache::lonxml::register_insert();
64: }
65:
66:
67: =pod
68:
69: =item set_bubble_lines()
70:
71: Called at analysis time to set the bubble lines
72: hash for the problem.. This should be called in the
73: end_problemtype tag in analysis mode.
74:
75: We fetch the hash of part id counters from lonxml
76: and push them into analyze:{part_id.bubble_lines}.
77:
78: =cut
79:
80: sub set_bubble_lines {
81: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
82:
83: foreach my $key (keys(%bubble_counters)) {
84: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
85: $bubble_counters{"$key"};
86: }
87: }
88:
89: #
90: # Decides what targets to render for.
91: # Implicit inputs:
92: # Various session environment variables:
93: # request.state - published - is a /res/ resource
94: # uploaded - is a /uploaded/ resource
95: # contruct - is a /priv/ resource
96: # form.grade_target - a form parameter requesting a specific target
97: sub get_target {
98: &Apache::lonxml::debug("request.state = $env{'request.state'}");
99: if( defined($env{'form.grade_target'})) {
100: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
101: } else {
102: &Apache::lonxml::debug("form.grade_target <undefined>");
103: }
104: if (($env{'request.state'} eq "published") ||
105: ($env{'request.state'} eq "uploaded")) {
106: if ( defined($env{'form.grade_target'} )
107: && ($env{'form.grade_target'} eq 'tex')) {
108: return ($env{'form.grade_target'});
109: } elsif ( defined($env{'form.grade_target'} )
110: && ($Apache::lonhomework::viewgrades eq 'F' )) {
111: return ($env{'form.grade_target'});
112: } elsif ( $env{'form.grade_target'} eq 'webgrade'
113: && ($Apache::lonhomework::queuegrade eq 'F' )) {
114: return ($env{'form.grade_target'});
115: } elsif ($env{'form.grade_target'} eq 'answer') {
116: if ($env{'form.answer_output_mode'} eq 'tex') {
117: return ($env{'form.grade_target'});
118: }
119: }
120: if ($env{'form.webgrade'} &&
121: ($Apache::lonhomework::modifygrades eq 'F'
122: || $Apache::lonhomework::queuegrade eq 'F' )) {
123: return ('grade','webgrade');
124: }
125: if ( defined($env{'form.submitted'}) &&
126: ( !defined($env{'form.newrandomization'}))) {
127: return ('grade', 'web');
128: } else {
129: return ('web');
130: }
131: } elsif ($env{'request.state'} eq "construct") {
132: #
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 createmenu {
182: my ($which,$request)=@_;
183: if ($which eq 'grade') {
184: $request->print('<script type="text/javascript" language="JavaScript">
185: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
186: "height=350,width=150,menubar=no");
187: </script>');
188: }
189: }
190:
191: sub proctor_checked_in {
192: my ($slot_name,$slot,$type)=@_;
193: my @possible_proctors=split(",",$slot->{'proctor'});
194:
195: return 1 if (!@possible_proctors);
196:
197: my $key;
198: if ($type eq 'Task') {
199: my $version=$Apache::lonhomework::history{'resource.0.version'};
200: $key ="resource.$version.0.checkedin";
201: } elsif ($type eq 'problem') {
202: $key ='resource.0.checkedin';
203: }
204: # backward compatability, used to be username@domain,
205: # now is username:domain
206: my $who = $Apache::lonhomework::history{$key};
207: if ($who !~ /:/) {
208: $who =~ tr/@/:/;
209: }
210: foreach my $possible (@possible_proctors) {
211: if ($who eq $possible
212: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
213: return 1;
214: }
215: }
216:
217: return 0;
218: }
219:
220: sub check_slot_access {
221: my ($id,$type)=@_;
222:
223: # does it pass normal muster
224: my ($status,$datemsg)=&check_access($id);
225:
226: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
227: if ($useslots ne 'resource' && $useslots ne 'map'
228: && $useslots ne 'map_map') {
229: return ($status,$datemsg);
230: }
231:
232: if ($status eq 'SHOW_ANSWER' ||
233: $status eq 'CLOSED' ||
234: $status eq 'INVALID_ACCESS' ||
235: $status eq 'UNAVAILABLE') {
236: return ($status,$datemsg);
237: }
238: if ($env{'request.state'} eq "construct") {
239: return ($status,$datemsg);
240: }
241:
242: if ($type eq 'Task') {
243: my $version=$Apache::lonhomework::history{'resource.version'};
244: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
245: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
246: return ('SHOW_ANSWER');
247: }
248: }
249:
250: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
251: my $available = &Apache::lonnet::EXT("resource.0.available");
252: my @slots= (split(':',$availablestudent),split(':',$available));
253:
254: # if (!@slots) {
255: # return ($status,$datemsg);
256: # }
257: my $slotstatus='NOT_IN_A_SLOT';
258: my ($returned_slot,$slot_name);
259: foreach my $slot (@slots) {
260: $slot =~ s/(^\s*|\s*$)//g;
261: &Apache::lonxml::debug("getting $slot");
262: my %slot=&Apache::lonnet::get_slot($slot);
263: &Apache::lonhomework::showhash(%slot);
264: if ($slot{'starttime'} < time &&
265: $slot{'endtime'} > time &&
266: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
267: &Apache::lonxml::debug("$slot is good");
268: $slotstatus='NEEDS_CHECKIN';
269: $returned_slot=\%slot;
270: $slot_name=$slot;
271: last;
272: }
273: }
274: if ($slotstatus eq 'NEEDS_CHECKIN' &&
275: &proctor_checked_in($slot_name,$returned_slot,$type)) {
276: &Apache::lonxml::debug("proctor checked in");
277: $slotstatus=$status;
278: }
279:
280: my ($is_correct,$got_grade,$checkedin);
281: if ($type eq 'Task') {
282: my $version=$Apache::lonhomework::history{'resource.0.version'};
283: $got_grade =
284: ($Apache::lonhomework::history{"resource.$version.0.status"}
285: =~ /^(?:pass|fail)$/);
286: $is_correct =
287: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
288: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
289: $checkedin =
290: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
291: } elsif ($type eq 'problem') {
292: $got_grade = 1;
293: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
294: $is_correct =
295: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
296: }
297:
298: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
299:
300: # no slot is currently open, and has been checked in for this version
301: # but hasn't got a grade, therefore must be awaiting a grade
302: if (!defined($slot_name)
303: && $checkedin
304: && !$got_grade) {
305: return ('WAITING_FOR_GRADE');
306: }
307:
308: # Previously used slot is no longer open, and has been checked in for this version.
309: # However, the problem is not closed, and potentially, another slot might be
310: # used to gain access to it to work on it, until the due date is reached, and the
311: # problem then becomes CLOSED. Therefore return the slotstatus -
312: # (which will be NOT_IN_SLOT).
313: if (!defined($slot_name)
314: && $checkedin
315: && $type eq 'problem') {
316: return ($slotstatus);
317: }
318:
319: if ($slotstatus eq 'NOT_IN_A_SLOT'
320: && $checkedin ) {
321:
322: if ($got_grade) {
323: return ('SHOW_ANSWER');
324: } else {
325: return ('WAITING_FOR_GRADE');
326: }
327:
328: }
329:
330: if ( $is_correct) {
331: if ($type eq 'problem') {
332: return ($status);
333: }
334: return ('SHOW_ANSWER');
335: }
336:
337: if ( $status eq 'CANNOT_ANSWER' &&
338: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
339: return ($status,$datemsg);
340: }
341:
342: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
343: }
344:
345: # JB, 9/24/2002: Any changes in this function may require a change
346: # in lonnavmaps::resource::getDateStatus.
347: sub check_access {
348: my ($id) = @_;
349: my $date ='';
350: my $status;
351: my $datemsg = '';
352: my $lastdate = '';
353: my $type;
354: my $passed;
355:
356: if ($env{'request.state'} eq "construct") {
357: if ($env{'form.problemstate'}) {
358: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
359: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
360: && &hide_problem_status())) {
361: return ('CANNOT_ANSWER',
362: &mt('is in this state due to author settings.'));
363: }
364: } else {
365: return ($env{'form.problemstate'},
366: &mt('is in this state due to author settings.'));
367: }
368: }
369: &Apache::lonxml::debug("in construction ignoring dates");
370: $status='CAN_ANSWER';
371: $datemsg=&mt('is in under construction');
372: # return ($status,$datemsg);
373: }
374:
375: &Apache::lonxml::debug("checking for part :$id:");
376: &Apache::lonxml::debug("time:".time);
377:
378: my ($symb)=&Apache::lonnet::whichuser();
379: &Apache::lonxml::debug("symb:".$symb);
380: #if ($env{'request.state'} ne "construct" && $symb ne '') {
381: if ($env{'request.state'} ne "construct") {
382: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
383: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
384: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
385: $status='INVALID_ACCESS';
386: $date=&mt("can not be accessed from your location.");
387: return($status,$date);
388: }
389:
390: foreach my $temp ("opendate","duedate","answerdate") {
391: $lastdate = $date;
392: if ($temp eq 'duedate') {
393: $date = &due_date($id);
394: } else {
395: $date = &Apache::lonnet::EXT("resource.$id.$temp");
396: }
397:
398: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
399: if ($thistype =~ /^(con_lost|no_such_host)/ ||
400: $date =~ /^(con_lost|no_such_host)/) {
401: $status='UNAVAILABLE';
402: $date=&mt("may open later.");
403: return($status,$date);
404: }
405: if ($thistype eq 'date_interval') {
406: if ($temp eq 'opendate') {
407: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
408: }
409: if ($temp eq 'answerdate') {
410: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
411: }
412: }
413: &Apache::lonxml::debug("found :$date: for :$temp:");
414: if ($date eq '') {
415: $date = &mt("an unknown date"); $passed = 0;
416: } elsif ($date eq 'con_lost') {
417: $date = &mt("an indeterminate date"); $passed = 0;
418: } else {
419: if (time < $date) { $passed = 0; } else { $passed = 1; }
420: $date = &Apache::lonlocal::locallocaltime($date);
421: }
422: if (!$passed) { $type=$temp; last; }
423: }
424: &Apache::lonxml::debug("have :$type:$passed:");
425: if ($passed) {
426: $status='SHOW_ANSWER';
427: $datemsg=$date;
428: } elsif ($type eq 'opendate') {
429: $status='CLOSED';
430: $datemsg = &mt("will open on")." $date";
431: } elsif ($type eq 'duedate') {
432: $status='CAN_ANSWER';
433: $datemsg = &mt("is due at")." $date";
434: } elsif ($type eq 'answerdate') {
435: $status='CLOSED';
436: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
437: }
438: }
439: if ($status eq 'CAN_ANSWER' ||
440: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
441: #check #tries, and if correct.
442: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
443: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
444: if ( $tries eq '' ) { $tries = '0'; }
445: if ( $maxtries eq '' &&
446: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
447: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
448: # if (correct and show prob status) or excused then CANNOT_ANSWER
449: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
450: &&
451: &show_problem_status())
452: ||
453: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
454: $status = 'CANNOT_ANSWER';
455: }
456: if ($status eq 'CANNOT_ANSWER'
457: && &show_answer_problem_status()) {
458: $status = 'SHOW_ANSWER';
459: }
460: }
461: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
462: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
463: &Apache::lonxml::debug("looking for interval @interval");
464: if ($interval[0]) {
465: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
466: &Apache::lonxml::debug("looking for accesstime $first_access");
467: if (!$first_access) {
468: $status='NOT_YET_VIEWED';
469: my $due_date = &due_date($id);
470: my $seconds_left = $due_date - time;
471: if ($seconds_left > $interval[0] || $due_date eq '') {
472: $seconds_left = $interval[0];
473: }
474: $datemsg=&seconds_to_human_length($seconds_left);
475: }
476: }
477: }
478:
479: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
480: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
481: # return ('UNCHECKEDOUT','needs to be checked out');
482: #}
483:
484:
485: &Apache::lonxml::debug("sending back :$status:$datemsg:");
486: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
487: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
488: $status='CAN_ANSWER';
489: $datemsg=&mt('is closed but you are allowed to view it');
490: }
491:
492: return ($status,$datemsg);
493: }
494: # this should work exactly like the copy in lonnavmaps.pm
495: sub due_date {
496: my ($part_id,$symb,$udom,$uname)=@_;
497: my $date;
498: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
499: $udom,$uname);
500: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
501: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
502: $udom,$uname);
503: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
504: if ($interval[0] =~ /\d+/) {
505: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
506: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
507: if (defined($first_access)) {
508: my $interval = $first_access+$interval[0];
509: $date = (!$due_date || $interval < $due_date) ? $interval
510: : $due_date;
511: } else {
512: $date = $due_date;
513: }
514: } else {
515: $date = $due_date;
516: }
517: return $date
518: }
519:
520: sub seconds_to_human_length {
521: my ($length)=@_;
522:
523: my $seconds=$length%60; $length=int($length/60);
524: my $minutes=$length%60; $length=int($length/60);
525: my $hours=$length%24; $length=int($length/24);
526: my $days=$length;
527:
528: my $timestr;
529: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
530: if ($hours > 0) { $timestr.=($timestr?", ":"").
531: &mt('[quant,_1,hour]',$hours); }
532: if ($minutes > 0) { $timestr.=($timestr?", ":"").
533: &mt('[quant,_1,minute]',$minutes); }
534: if ($seconds > 0) { $timestr.=($timestr?", ":"").
535: &mt('[quant,_1,second]',$seconds); }
536: return $timestr;
537: }
538:
539: sub showhash {
540: my (%hash) = @_;
541: &showhashsubset(\%hash,'.');
542: return '';
543: }
544:
545: sub showarray {
546: my ($array)=@_;
547: my $string="(";
548: foreach my $elm (@{ $array }) {
549: if (ref($elm) eq 'ARRAY') {
550: $string.=&showarray($elm);
551: } elsif (ref($elm) eq 'HASH') {
552: $string.= "HASH --- \n<br />";
553: $string.= &showhashsubset($elm,'.');
554: } else {
555: $string.="$elm,"
556: }
557: }
558: chop($string);
559: $string.=")";
560: return $string;
561: }
562:
563: sub showhashsubset {
564: my ($hash,$keyre) = @_;
565: my $resultkey;
566: foreach $resultkey (sort keys %$hash) {
567: if ($resultkey !~ /$keyre/) { next; }
568: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
569: &Apache::lonxml::debug("$resultkey ---- ".
570: &showarray($$hash{$resultkey}));
571: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
572: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
573: &showhashsubset($$hash{$resultkey},'.');
574: } else {
575: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
576: }
577: }
578: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
579: return '';
580: }
581:
582: sub setuppermissions {
583: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
584: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
585: if (! $viewgrades &&
586: exists($env{'request.course.sec'}) &&
587: $env{'request.course.sec'} !~ /^\s*$/) {
588: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
589: '/'.$env{'request.course.sec'});
590: }
591: $Apache::lonhomework::viewgrades = $viewgrades;
592:
593: if ($Apache::lonhomework::browse eq 'F' &&
594: $env{'form.devalidatecourseresdata'} eq 'on') {
595: my (undef,$courseid) = &Apache::lonnet::whichuser();
596: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
597: $env{"course.$courseid.domain"});
598: }
599:
600: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
601: if (! $modifygrades &&
602: exists($env{'request.course.sec'}) &&
603: $env{'request.course.sec'} !~ /^\s*$/) {
604: $modifygrades =
605: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
606: '/'.$env{'request.course.sec'});
607: }
608: $Apache::lonhomework::modifygrades = $modifygrades;
609:
610: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
611: if (! $queuegrade &&
612: exists($env{'request.course.sec'}) &&
613: $env{'request.course.sec'} !~ /^\s*$/) {
614: $queuegrade =
615: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
616: '/'.$env{'request.course.sec'});
617: }
618: $Apache::lonhomework::queuegrade = $queuegrade;
619: return '';
620: }
621:
622: sub unset_permissions {
623: undef($Apache::lonhomework::queuegrade);
624: undef($Apache::lonhomework::modifygrades);
625: undef($Apache::lonhomework::viewgrades);
626: undef($Apache::lonhomework::browse);
627: }
628:
629: sub setupheader {
630: my $request=$_[0];
631: &Apache::loncommon::content_type($request,'text/html');
632: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
633: &Apache::loncommon::no_cache($request);
634: }
635: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
636: # 'lastrevisiondate'));
637: $request->send_http_header;
638: return OK if $request->header_only;
639: return ''
640: }
641:
642: sub handle_save_or_undo {
643: my ($request,$problem,$result) = @_;
644:
645: my $file = &Apache::lonnet::filelocation("",$request->uri);
646: my $filebak =$file.".bak";
647: my $filetmp =$file.".tmp";
648: my $error=0;
649: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
650: my $error=0;
651: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
652: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
653: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
654: if (!$error) {
655: &Apache::lonxml::info("<p><b>".
656: &mt("Undid changes, Switched [_1] and [_2]",
657: '<span class="LC_filename">'.$filebak.
658: '</span>',
659: '<span class="LC_filename">'.$file.
660: '</span>')."</b></p>");
661: } else {
662: &Apache::lonxml::info("<p><span class=\"LC_error\">".
663: &mt("Unable to undo, unable to switch [_1] and [_2]",
664: '<span class="LC_filename">'.
665: $filebak.'</span>',
666: '<span class="LC_filename">'.
667: $file.'</span>')."</span></p>");
668: $error=1;
669: }
670: } else {
671: &Apache::lonnet::correct_line_ends($result);
672:
673: my $fs=Apache::File->new(">$filebak");
674: if (defined($fs)) {
675: print $fs $$problem;
676: } else {
677: &Apache::lonxml::info("<span class=\"LC_error\">".
678: &mt("Unable to make backup [_1]",
679: '<span class="LC_filename">'.
680: $filebak.'</span>')."</span>");
681: $error=2;
682: }
683: my $fh=Apache::File->new(">$file");
684: if (defined($fh)) {
685: print $fh $$result;
686: } else {
687: &Apache::lonxml::info('<span class="LC_error">'.
688: &mt("Unable to write to [_1]",
689: '<span class="LC_filename">'.
690: $file.'</span>').
691: '</span>');
692: $error|=4;
693: }
694: }
695: return $error;
696: }
697:
698: sub analyze_header {
699: my ($request) = @_;
700: my $js = &Apache::structuretags::setmode_javascript();
701:
702: # Breadcrumbs
703: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
704: 'text' => 'Construction Space'},
705: {'href' => '',
706: 'text' => 'Problem Testing'},
707: {'href' => '',
708: 'text' => 'Analyzing a problem'}];
709:
710: my $result =
711: &Apache::loncommon::start_page('Analyzing a problem',
712: $js,
713: {'bread_crumbs' => $brcrum,})
714: .&Apache::loncommon::head_subbox(
715: &Apache::loncommon::CSTR_pageheader());
716: $result .=
717: &Apache::lonxml::message_location().'
718: <form name="lonhomework" method="post" action="'.
719: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
720: '<input type="hidden" name="problemmode" value="'.
721: $env{'form.problemmode'}.'" />'.
722: &Apache::structuretags::remember_problem_state().'
723: <div class="LC_edit_problem_analyze_header">
724: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
725: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
726: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
727: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
728: <hr />
729: <input type="button" name="submitmode" value="'.&mt("View").'" '.
730: 'onclick="javascript:setmode(this.form,'."'view'".')" />
731: <hr />
732: </div>
733: </form>';
734: &Apache::lonxml::add_messages(\$result);
735: $request->print($result);
736: $request->rflush();
737: }
738:
739: sub analyze_footer {
740: my ($request) = @_;
741: $request->print(&Apache::loncommon::end_page());
742: $request->rflush();
743: }
744:
745: sub analyze {
746: my ($request,$file) = @_;
747: &Apache::lonxml::debug("Analyze");
748: my $result;
749: my %overall;
750: my %seedexample;
751: my %allparts;
752: my $rndseed=$env{'form.rndseed'};
753: &analyze_header($request);
754: my %prog_state=
755: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
756: &mt('Getting Problem Variants'),
757: $env{'form.numtoanalyze'},
758: 'inline',undef);
759: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
760: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
761: &mt('last problem'));
762: if (&Apache::loncommon::connection_aborted($request)) { return; }
763: my $thisseed=$i+$rndseed;
764: my $subresult=&Apache::lonnet::ssi($request->uri,
765: ('grade_target' => 'analyze'),
766: ('rndseed' => $thisseed));
767: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
768: my %analyze=&Apache::lonnet::str2hash($subresult);
769: my @parts;
770: if (defined(@{ $analyze{'parts'} })) {
771: @parts=@{ $analyze{'parts'} };
772: }
773: foreach my $part (@parts) {
774: if (!exists($allparts{$part})) {$allparts{$part}=1;};
775: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
776: $analyze{$part.'.type'} eq 'stringresponse' ||
777: $analyze{$part.'.type'} eq 'formularesponse' ) {
778: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
779: my $i=0;
780: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
781: push( @{ $overall{$part.'.answer'}[$i] },
782: $answer_part);
783: my $concatanswer= join("\0",@{ $answer_part });
784: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
785: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
786: }
787: $seedexample{join("\0",$part,$i,@{$answer_part})}=
788: $thisseed;
789: $i++;
790: }
791: }
792: if (!keys(%{ $analyze{$part.'.answer'} })) {
793: my $answer_part =
794: ['<span class="LC_error">'.&mt('Error').'</span>'];
795: $seedexample{join("\0",$part,0,@{$answer_part})}=
796: $thisseed;
797: push( @{ $overall{$part.'.answer'}[0] },
798: $answer_part);
799: }
800: }
801: }
802: }
803: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
804: &mt('Analyzing Results'));
805: $request->print('<hr />'
806: .'<h3>'
807: .&mt('List of possible answers')
808: .'</h3>'
809: );
810: foreach my $part (sort(keys(%allparts))) {
811: if (defined(@{ $overall{$part.'.answer'} })) {
812: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
813: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
814: $request->print(&Apache::loncommon::start_data_table()
815: .&Apache::loncommon::start_data_table_header_row()
816: .'<th colspan="'.($num_cols+1).'">'
817: .&mt('Part').' '.$part
818: );
819: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
820: $request->print(' '.&mt('Answer [_1]',$i+1));
821: }
822: $request->print('</th>'
823: .&Apache::loncommon::end_data_table_header_row()
824: );
825: my %frequency;
826: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
827: $frequency{join("\0",@{ $answer })}++;
828: }
829: $request->print(&Apache::loncommon::start_data_table_header_row()
830: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
831: .'<th>'.&mt('Frequency').'<br />'
832: .'('.&mt('click for example').')</th>'
833: .&Apache::loncommon::end_data_table_header_row()
834: );
835: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
836: $request->print(&Apache::loncommon::start_data_table_row()
837: .'<td>'
838: .join('</td><td>',split("\0",$answer))
839: .'</td>'
840: .'<td>'
841: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
842: .'</td>'
843: .&Apache::loncommon::end_data_table_row()
844: );
845: }
846: $request->print(&Apache::loncommon::end_data_table());
847: }
848: } else {
849: $request->print('<p class="LC_warning">'
850: .&mt('Response [_1] is not analyzable at this time.',$part)
851: .'</p>'
852: );
853: }
854: }
855: if (scalar(keys(%allparts)) == 0 ) {
856: $request->print('<p class="LC_warning">'
857: .&mt('Found no analyzable responses in this problem.'
858: .' Currently only Numerical, Formula and String response styles are supported.')
859: .'</p>'
860: );
861: }
862: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
863: &analyze_footer($request);
864: &Apache::lonhomework::showhash(%overall);
865: return $result;
866: }
867:
868: {
869: my $show_problem_status;
870: sub reset_show_problem_status {
871: undef($show_problem_status);
872: }
873:
874: sub set_show_problem_status {
875: my ($new_status) = @_;
876: $show_problem_status = lc($new_status);
877: }
878:
879: sub hide_problem_status {
880: return ($show_problem_status eq 'no'
881: || $show_problem_status eq 'no_feedback_ever');
882: }
883:
884: sub show_problem_status {
885: return ($show_problem_status eq 'yes'
886: || $show_problem_status eq 'answer'
887: || $show_problem_status eq '');
888: }
889:
890: sub show_some_problem_status {
891: return ($show_problem_status eq 'no');
892: }
893:
894: sub show_no_problem_status {
895: return ($show_problem_status eq 'no_feedback_ever');
896: }
897:
898: sub show_answer_problem_status {
899: return ($show_problem_status eq 'answer');
900: }
901: }
902:
903: sub editxmlmode {
904: my ($request,$file) = @_;
905: my $result;
906: my $problem=&Apache::lonnet::getfile($file);
907: if ($problem eq -1) {
908: &Apache::lonxml::error(
909: '<p class="LC_error">'
910: .&mt('Unable to find [_1]',
911: '<span class="LC_filename">'.$file.'</span>')
912: .'</p>');
913:
914: $problem='';
915: }
916: if (($env{'form.problemmode'} eq 'saveeditxml') ||
917: ($env{'form.problemmode'} eq 'saveviewxml') ||
918: ($env{'form.problemmode'} eq 'undoxml')) {
919: my $error=&handle_save_or_undo($request,\$problem,
920: \$env{'form.editxmltext'});
921: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
922: }
923: &Apache::lonhomework::showhashsubset(\%env,'^form');
924: if ($env{'form.problemmode'} eq 'saveviewxml') {
925: &Apache::lonhomework::showhashsubset(\%env,'^form');
926: $env{'form.problemmode'}='view';
927: &renderpage($request,$file);
928: } else {
929: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
930: if ($cols > 80) { $cols = 80; }
931: if ($cols < 70) { $cols = 70; }
932: if ($rows < 20) { $rows = 20; }
933: my $js =
934: &Apache::edit::js_change_detection().
935: &Apache::loncommon::resize_textarea_js().
936: &Apache::structuretags::setmode_javascript().
937: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
938: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
939:
940: # Breadcrumbs
941: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
942: 'text' => 'Construction Space'},
943: {'href' => '',
944: 'text' => 'Problem Editing'}];
945:
946: my $start_page =
947: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
948: {'no_auto_mt_title' => 1,
949: 'only_body' => $only_body,
950: 'add_entries' => {
951: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
952: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
953: },
954: 'bread_crumbs' => $brcrum,
955: });
956:
957: $result=$start_page
958: .&Apache::loncommon::head_subbox(
959: &Apache::loncommon::CSTR_pageheader());
960: $result.=&renderpage($request,$file,['no_output_web'],1).
961: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
962: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
963: &Apache::structuretags::remember_problem_state().'
964: <div class="LC_edit_problem_editxml_header">
965: <table class="LC_edit_problem_header_title"><tr><td>
966: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
967: </td><td align="right">
968: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
969: </td></tr>
970: </table>';
971:
972: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
973: &Apache::structuretags::problem_edit_buttons('editxml');
974:
975: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
976: '<textarea '.&Apache::edit::element_change_detection().
977: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
978: ' name="editxmltext" id="LC_editxmltext">'.
979: &HTML::Entities::encode($problem,'<>&"').'</textarea>
980: <div id="LC_aftertextarea">
981: </div>
982: </form>'.&Apache::loncommon::end_page();
983: &Apache::lonxml::add_messages(\$result);
984: $request->print($result);
985: }
986: return '';
987: }
988:
989: #
990: # Render the page in whatever target desired.
991: #
992: sub renderpage {
993: my ($request,$file,$targets,$return_string) = @_;
994:
995: my @targets = @{$targets || [&get_target()]};
996: &Apache::lonhomework::showhashsubset(\%env,'form.');
997: &Apache::lonxml::debug("Running targets ".join(':',@targets));
998:
999: my $overall_result;
1000: foreach my $target (@targets) {
1001: # FIXME need to do something intelligent when a problem goes
1002: # from viewable to not viewable due to map conditions
1003: #&setuppermissions();
1004: #if ( $Apache::lonhomework::browse ne '2'
1005: # && $Apache::lonhomework::browse ne 'F' ) {
1006: # $request->print(" You most likely shouldn't see me.");
1007: #}
1008: #my $t0 = [&gettimeofday()];
1009: my $output=1;
1010: if ($target eq 'no_output_web') {
1011: $target = 'web'; $output=0;
1012: }
1013: my $problem=&Apache::lonnet::getfile($file);
1014: my $result;
1015: if ($problem eq -1) {
1016: $problem='';
1017: my $filename=(split('/',$file))[-1];
1018: my $error =
1019: '<p class="LC_error">'
1020: .&mt('Unable to find [_1]',
1021: '<span class="LC_filename">'.$filename.'</span>')
1022: ."</p>";
1023: $result.=
1024: &Apache::loncommon::simple_error_page($request,'Not available',
1025: $error);
1026: return;
1027: }
1028:
1029: my %mystyle;
1030: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1031: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1032: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1033:
1034: &Apache::lonxml::debug("Should be parsing now");
1035: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1036: &setup_vars($target),%mystyle);
1037: &finished_parsing();
1038: if (!$output) { $result = ''; }
1039: #$request->print("Result follows:");
1040: if ($target eq 'modified') {
1041: &handle_save_or_undo($request,\$problem,\$result);
1042: } else {
1043: if ($target eq 'analyze') {
1044: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1045: undef(%Apache::lonhomework::analyze);
1046: }
1047: #my $td=&tv_interval($t0);
1048: #if ( $Apache::lonxml::debug) {
1049: #$result =~ s:</body>::;
1050: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1051: #}
1052: # $request->print($result);
1053: $overall_result.=$result;
1054: # $request->rflush();
1055: }
1056: #$request->print(":Result ends");
1057: #my $td=&tv_interval($t0);
1058: }
1059: if (!$return_string) {
1060: &Apache::lonxml::add_messages(\$overall_result);
1061: $request->print($overall_result);
1062: $request->rflush();
1063: } else {
1064: return $overall_result;
1065: }
1066: }
1067:
1068: sub finished_parsing {
1069: undef($Apache::lonhomework::parsing_a_problem);
1070: undef($Apache::lonhomework::parsing_a_task);
1071: }
1072:
1073: sub get_template_list {
1074: my ($extension) = @_;
1075: my $result;
1076: my @allnames;
1077: &Apache::lonxml::debug("Looking for :$extension:");
1078: my $glob_extension = $extension;
1079: if ($extension eq 'survey' || $extension eq 'exam') {
1080: $glob_extension = 'problem';
1081: }
1082: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1083: '/templates/*.'.$glob_extension);
1084: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1085: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1086: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1087: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1088: my ($midpoint,$seconddiv,$numfiles);
1089: $numfiles = 0;
1090: foreach my $file (@files) {
1091: next if ($file->[1] !~ /\S/);
1092: $numfiles ++;
1093: }
1094: if ($numfiles > 0) {
1095: $result = '<div class="LC_left_float">';
1096: $midpoint = int($numfiles/2);
1097: if ($numfiles%2) {
1098: $midpoint ++;
1099: }
1100: }
1101: my $count = 0;
1102: my $currentcategory='';
1103: my $first = 1;
1104: foreach my $file (@files) {
1105: next if ($file->[1] !~ /\S/);
1106: if ($file->[2] ne $currentcategory) {
1107: $currentcategory=$file->[2];
1108: if ((!$seconddiv) && ($count >= $midpoint)) {
1109: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1110: $seconddiv = 1;
1111: } elsif (!$first) {
1112: $result.='</div>'."\n";
1113: } else {
1114: $first = 0;
1115: }
1116: $result.= '<div class="LC_Box">'."\n"
1117: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1118: $count++;
1119: }
1120: $result .=
1121: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1122: $file->[1].'</label>';
1123: if ($file->[3]) {
1124: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1125: }
1126: my $filename=$file->[0];
1127: $filename=~s/^\/home\/httpd\/html//;
1128: $result.=' <span class="LC_fontsize_small">'
1129: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1130: .'</span><br />'."\n";
1131: $count ++;
1132: }
1133: if ($numfiles > 0) {
1134: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1135: }
1136: return $result;
1137: }
1138:
1139: sub newproblem {
1140: my ($request) = @_;
1141:
1142: if ($env{'form.template'}) {
1143: my $file = $env{'form.template'};
1144: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1145: &File::Copy::copy($file,$dest);
1146: &renderpage($request,$dest);
1147: return;
1148: }
1149:
1150: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1151: &Apache::lonxml::debug("Looking for :$extension:");
1152: my $templatelist=&get_template_list($extension);
1153: if ($env{'form.newfile'} && !$templatelist) {
1154: # no templates found
1155: my $templatefilename =
1156: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1157: &Apache::lonxml::debug("$templatefilename");
1158: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1159: &File::Copy::copy($templatefilename,$dest);
1160: &renderpage($request,$dest);
1161: } else {
1162: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1163: my $shownurl=$url;
1164: $shownurl=~s-^/~-/priv/-;
1165: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1166: my $errormsg;
1167: my $instructions;
1168: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1169: 'text' => 'Construction Space'},
1170: {'href' => '',
1171: 'text' => "Create New $extension"}];
1172: my $start_page =
1173: &Apache::loncommon::start_page("Create New $extension",
1174: undef,
1175: {'bread_crumbs' => $brcrum,});
1176: $request->print(
1177: $start_page
1178: .&Apache::loncommon::head_subbox(
1179: &Apache::loncommon::CSTR_pageheader())
1180: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1181: $errormsg
1182: ".&mt("The requested file [_1] currently does not exist.",
1183: '<span class="LC_filename">'.$shownurl.'</span>').'
1184: <p class="LC_info">
1185: '.&mt("To create a new $extension, select a template from the".
1186: " list below. Then click on the \"Create $extension\" button.").'
1187: </p><div><form action="'.$url.'" method="post">');
1188:
1189: if (defined($templatelist)) {
1190: $request->print($templatelist);
1191: }
1192: $request->print('<br /><input type="submit" name="newfile" value="'.
1193: &mt("Create $extension").'" />');
1194: $request->print('</form></div>'.&Apache::loncommon::end_page());
1195: }
1196: return;
1197: }
1198:
1199: sub update_construct_style {
1200: if ($env{'request.state'} eq "construct"
1201: && $env{'form.problemmode'} eq 'view'
1202: && defined($env{'form.submitted'})
1203: && !defined($env{'form.resetdata'})
1204: && !defined($env{'form.newrandomization'})) {
1205: if ((!$env{'form.style_file'} && $env{'construct.style'})
1206: ||$env{'form.clear_style_file'}) {
1207: &Apache::lonnet::delenv('construct.style');
1208: } elsif ($env{'form.style_file'}
1209: && $env{'construct.style'} ne $env{'form.style_file'}) {
1210: &Apache::lonnet::appenv({'construct.style' =>
1211: $env{'form.style_file'}});
1212: }
1213: }
1214: }
1215:
1216:
1217: sub handler {
1218: #my $t0 = [&gettimeofday()];
1219: my $request=$_[0];
1220: $Apache::lonxml::request=$request;
1221: $Apache::lonxml::debug=$env{'user.debug'};
1222: $env{'request.uri'}=$request->uri;
1223: &setuppermissions();
1224:
1225: my $file=&Apache::lonnet::filelocation("",$request->uri);
1226:
1227: #check if we know where we are
1228: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1229: # if we are browsing we might not be able to know where we are
1230: if ($Apache::lonhomework::browse ne 'F' &&
1231: $env{'request.state'} ne "construct") {
1232: #should know where we are, so ask
1233: &unset_permissions();
1234: $request->internal_redirect('/adm/ambiguous');
1235: return OK;
1236: }
1237: }
1238: if (&setupheader($request)) {
1239: &unset_permissions();
1240: return OK;
1241: }
1242: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1243: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1244: my ($symb) = &Apache::lonnet::whichuser();
1245: &Apache::lonxml::debug('symb is '.$symb);
1246: if ($env{'request.state'} eq "construct") {
1247: if ( -e $file ) {
1248: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1249: ['problemmode']);
1250: if (!(defined $env{'form.problemmode'})) {
1251: #first visit to problem in construction space
1252: $env{'form.problemmode'}= 'view';
1253: &renderpage($request,$file);
1254: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1255: ($env{'form.problemmode'} eq 'saveeditxml') ||
1256: ($env{'form.problemmode'} eq 'saveviewxml') ||
1257: ($env{'form.problemmode'} eq 'undoxml')) {
1258: &editxmlmode($request,$file);
1259: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1260: &analyze($request,$file);
1261: } else {
1262: &update_construct_style();
1263: &renderpage($request,$file);
1264: }
1265: } else {
1266: # requested file doesn't exist in contruction space
1267: &newproblem($request);
1268: }
1269: } else {
1270: # just render the page normally outside of construction space
1271: &Apache::lonxml::debug("not construct");
1272: &renderpage($request,$file);
1273: }
1274: #my $td=&tv_interval($t0);
1275: #&Apache::lonxml::debug("Spent $td seconds processing");
1276: # always turn off debug messages
1277: $Apache::lonxml::debug=0;
1278: &unset_permissions();
1279: return OK;
1280:
1281: }
1282:
1283: 1;
1284: __END__
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