1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.329 2011/10/31 19:35:03 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 proctor_checked_in {
182: my ($slot_name,$slot,$type)=@_;
183: my @possible_proctors=split(",",$slot->{'proctor'});
184:
185: return 1 if (!@possible_proctors);
186:
187: my $key;
188: if ($type eq 'Task') {
189: my $version=$Apache::lonhomework::history{'resource.0.version'};
190: $key ="resource.$version.0.checkedin";
191: } elsif ($type eq 'problem') {
192: $key ='resource.0.checkedin';
193: }
194: # backward compatability, used to be username@domain,
195: # now is username:domain
196: my $who = $Apache::lonhomework::history{$key};
197: if ($who !~ /:/) {
198: $who =~ tr/@/:/;
199: }
200: foreach my $possible (@possible_proctors) {
201: if ($who eq $possible
202: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
203: return 1;
204: }
205: }
206:
207: return 0;
208: }
209:
210: sub check_slot_access {
211: my ($id,$type)=@_;
212:
213: # does it pass normal muster
214: my ($status,$datemsg)=&check_access($id);
215:
216: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
217: if ($useslots ne 'resource' && $useslots ne 'map'
218: && $useslots ne 'map_map') {
219: return ($status,$datemsg);
220: }
221:
222: if ($status eq 'SHOW_ANSWER' ||
223: $status eq 'CLOSED' ||
224: $status eq 'INVALID_ACCESS' ||
225: $status eq 'UNAVAILABLE') {
226: return ($status,$datemsg);
227: }
228: if ($env{'request.state'} eq "construct") {
229: return ($status,$datemsg);
230: }
231:
232: if ($type eq 'Task') {
233: my $version=$Apache::lonhomework::history{'resource.version'};
234: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
235: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
236: return ('SHOW_ANSWER');
237: }
238: }
239:
240: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
241: my $available = &Apache::lonnet::EXT("resource.0.available");
242: my @slots= (split(':',$availablestudent),split(':',$available));
243:
244: # if (!@slots) {
245: # return ($status,$datemsg);
246: # }
247: my $slotstatus='NOT_IN_A_SLOT';
248: my ($returned_slot,$slot_name);
249: foreach my $slot (@slots) {
250: $slot =~ s/(^\s*|\s*$)//g;
251: &Apache::lonxml::debug("getting $slot");
252: my %slot=&Apache::lonnet::get_slot($slot);
253: &Apache::lonhomework::showhash(%slot);
254: if ($slot{'starttime'} < time &&
255: $slot{'endtime'} > time &&
256: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
257: &Apache::lonxml::debug("$slot is good");
258: $slotstatus='NEEDS_CHECKIN';
259: $returned_slot=\%slot;
260: $slot_name=$slot;
261: last;
262: }
263: }
264: if ($slotstatus eq 'NEEDS_CHECKIN' &&
265: &proctor_checked_in($slot_name,$returned_slot,$type)) {
266: &Apache::lonxml::debug("proctor checked in");
267: $slotstatus=$status;
268: }
269:
270: my ($is_correct,$got_grade,$checkedin);
271: if ($type eq 'Task') {
272: my $version=$Apache::lonhomework::history{'resource.0.version'};
273: $got_grade =
274: ($Apache::lonhomework::history{"resource.$version.0.status"}
275: =~ /^(?:pass|fail)$/);
276: $is_correct =
277: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
278: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
279: $checkedin =
280: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
281: } elsif ($type eq 'problem') {
282: $got_grade = 1;
283: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
284: $is_correct =
285: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
286: }
287:
288: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
289:
290: # no slot is currently open, and has been checked in for this version
291: # but hasn't got a grade, therefore must be awaiting a grade
292: if (!defined($slot_name)
293: && $checkedin
294: && !$got_grade) {
295: return ('WAITING_FOR_GRADE');
296: }
297:
298: # Previously used slot is no longer open, and has been checked in for this version.
299: # However, the problem is not closed, and potentially, another slot might be
300: # used to gain access to it to work on it, until the due date is reached, and the
301: # problem then becomes CLOSED. Therefore return the slotstatus -
302: # (which will be NOT_IN_SLOT).
303: if (!defined($slot_name)
304: && $checkedin
305: && $type eq 'problem') {
306: return ($slotstatus);
307: }
308:
309: if ($slotstatus eq 'NOT_IN_A_SLOT'
310: && $checkedin ) {
311:
312: if ($got_grade) {
313: return ('SHOW_ANSWER');
314: } else {
315: return ('WAITING_FOR_GRADE');
316: }
317:
318: }
319:
320: if ( $is_correct) {
321: if ($type eq 'problem') {
322: return ($status);
323: }
324: return ('SHOW_ANSWER');
325: }
326:
327: if ( $status eq 'CANNOT_ANSWER' &&
328: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
329: return ($status,$datemsg);
330: }
331:
332: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
333: }
334:
335: # JB, 9/24/2002: Any changes in this function may require a change
336: # in lonnavmaps::resource::getDateStatus.
337: sub check_access {
338: my ($id) = @_;
339: my $date ='';
340: my $status;
341: my $datemsg = '';
342: my $lastdate = '';
343: my $type;
344: my $passed;
345:
346: if ($env{'request.state'} eq "construct") {
347: if ($env{'form.problemstate'}) {
348: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
349: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
350: && &hide_problem_status())) {
351: return ('CANNOT_ANSWER',
352: &mt('is in this state due to author settings.'));
353: }
354: } else {
355: return ($env{'form.problemstate'},
356: &mt('is in this state due to author settings.'));
357: }
358: }
359: &Apache::lonxml::debug("in construction ignoring dates");
360: $status='CAN_ANSWER';
361: $datemsg=&mt('is in under construction');
362: # return ($status,$datemsg);
363: }
364:
365: &Apache::lonxml::debug("checking for part :$id:");
366: &Apache::lonxml::debug("time:".time);
367:
368: my ($symb)=&Apache::lonnet::whichuser();
369: &Apache::lonxml::debug("symb:".$symb);
370: #if ($env{'request.state'} ne "construct" && $symb ne '') {
371: if ($env{'request.state'} ne "construct") {
372: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
373: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
374: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
375: $status='INVALID_ACCESS';
376: $date=&mt("can not be accessed from your location.");
377: return($status,$date);
378: }
379: if ($env{'form.grade_imsexport'}) {
380: if (($env{'request.course.id'}) &&
381: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
382: return ('SHOW_ANSWER');
383: }
384: }
385: foreach my $temp ("opendate","duedate","answerdate") {
386: $lastdate = $date;
387: if ($temp eq 'duedate') {
388: $date = &due_date($id);
389: } else {
390: $date = &Apache::lonnet::EXT("resource.$id.$temp");
391: }
392:
393: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
394: if ($thistype =~ /^(con_lost|no_such_host)/ ||
395: $date =~ /^(con_lost|no_such_host)/) {
396: $status='UNAVAILABLE';
397: $date=&mt("may open later.");
398: return($status,$date);
399: }
400: if ($thistype eq 'date_interval') {
401: if ($temp eq 'opendate') {
402: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
403: }
404: if ($temp eq 'answerdate') {
405: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
406: }
407: }
408: &Apache::lonxml::debug("found :$date: for :$temp:");
409: if ($date eq '') {
410: $date = &mt("an unknown date"); $passed = 0;
411: } elsif ($date eq 'con_lost') {
412: $date = &mt("an indeterminate date"); $passed = 0;
413: } else {
414: if (time < $date) { $passed = 0; } else { $passed = 1; }
415: $date = &Apache::lonlocal::locallocaltime($date);
416: }
417: if (!$passed) { $type=$temp; last; }
418: }
419: &Apache::lonxml::debug("have :$type:$passed:");
420: if ($passed) {
421: $status='SHOW_ANSWER';
422: $datemsg=$date;
423: } elsif ($type eq 'opendate') {
424: $status='CLOSED';
425: $datemsg = &mt("will open on")." $date";
426: } elsif ($type eq 'duedate') {
427: $status='CAN_ANSWER';
428: $datemsg = &mt("is due at")." $date";
429: } elsif ($type eq 'answerdate') {
430: $status='CLOSED';
431: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
432: }
433: }
434: if ($status eq 'CAN_ANSWER' ||
435: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
436: #check #tries, and if correct.
437: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
438: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
439: if ( $tries eq '' ) { $tries = '0'; }
440: if ( $maxtries eq '' &&
441: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
442: $Apache::lonhomework::results{'resource.'.$id.'.maxtries'}=$maxtries;
443: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
444: # if (correct and show prob status) or excused then CANNOT_ANSWER
445: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
446: &&
447: &show_problem_status()
448: &&
449: $Apache::lonhomework::history{"resource.$id.awarded"}==1)
450: ||
451: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
452: $status = 'CANNOT_ANSWER';
453: }
454: if ($status eq 'CANNOT_ANSWER'
455: && &show_answer_problem_status()) {
456: $status = 'SHOW_ANSWER';
457: }
458: }
459: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
460: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
461: &Apache::lonxml::debug("looking for interval @interval");
462: if ($interval[0]) {
463: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
464: &Apache::lonxml::debug("looking for accesstime $first_access");
465: if (!$first_access) {
466: $status='NOT_YET_VIEWED';
467: my $due_date = &due_date($id);
468: my $seconds_left = $due_date - time;
469: if ($seconds_left > $interval[0] || $due_date eq '') {
470: $seconds_left = $interval[0];
471: }
472: $datemsg=&seconds_to_human_length($seconds_left);
473: }
474: }
475: }
476:
477: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
478: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
479: # return ('UNCHECKEDOUT','needs to be checked out');
480: #}
481:
482:
483: &Apache::lonxml::debug("sending back :$status:$datemsg:");
484: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
485: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
486: $status='CAN_ANSWER';
487: $datemsg=&mt('is closed but you are allowed to view it');
488: }
489:
490: return ($status,$datemsg);
491: }
492: # this should work exactly like the copy in lonnavmaps.pm
493: sub due_date {
494: my ($part_id,$symb,$udom,$uname)=@_;
495: my $date;
496: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
497: $udom,$uname);
498: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
499: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
500: $udom,$uname);
501: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
502: if ($interval[0] =~ /\d+/) {
503: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
504: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
505: if (defined($first_access)) {
506: my $interval = $first_access+$interval[0];
507: $date = (!$due_date || $interval < $due_date) ? $interval
508: : $due_date;
509: } else {
510: $date = $due_date;
511: }
512: } else {
513: $date = $due_date;
514: }
515: return $date
516: }
517:
518: sub seconds_to_human_length {
519: my ($length)=@_;
520:
521: my $seconds=$length%60; $length=int($length/60);
522: my $minutes=$length%60; $length=int($length/60);
523: my $hours=$length%24; $length=int($length/24);
524: my $days=$length;
525:
526: my $timestr;
527: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
528: if ($hours > 0) { $timestr.=($timestr?", ":"").
529: &mt('[quant,_1,hour]',$hours); }
530: if ($minutes > 0) { $timestr.=($timestr?", ":"").
531: &mt('[quant,_1,minute]',$minutes); }
532: if ($seconds > 0) { $timestr.=($timestr?", ":"").
533: &mt('[quant,_1,second]',$seconds); }
534: return $timestr;
535: }
536:
537: sub showhash {
538: my (%hash) = @_;
539: &showhashsubset(\%hash,'.');
540: return '';
541: }
542:
543: sub showarray {
544: my ($array)=@_;
545: my $string="(";
546: foreach my $elm (@{ $array }) {
547: if (ref($elm) eq 'ARRAY') {
548: $string.=&showarray($elm);
549: } elsif (ref($elm) eq 'HASH') {
550: $string.= "HASH --- \n<br />";
551: $string.= &showhashsubset($elm,'.');
552: } else {
553: $string.="$elm,"
554: }
555: }
556: chop($string);
557: $string.=")";
558: return $string;
559: }
560:
561: sub showhashsubset {
562: my ($hash,$keyre) = @_;
563: my $resultkey;
564: foreach $resultkey (sort keys %$hash) {
565: if ($resultkey !~ /$keyre/) { next; }
566: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
567: &Apache::lonxml::debug("$resultkey ---- ".
568: &showarray($$hash{$resultkey}));
569: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
570: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
571: &showhashsubset($$hash{$resultkey},'.');
572: } else {
573: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
574: }
575: }
576: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
577: return '';
578: }
579:
580: sub setuppermissions {
581: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
582: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
583: if (! $viewgrades &&
584: exists($env{'request.course.sec'}) &&
585: $env{'request.course.sec'} !~ /^\s*$/) {
586: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
587: '/'.$env{'request.course.sec'});
588: }
589: $Apache::lonhomework::viewgrades = $viewgrades;
590:
591: if ($Apache::lonhomework::browse eq 'F' &&
592: $env{'form.devalidatecourseresdata'} eq 'on') {
593: my (undef,$courseid) = &Apache::lonnet::whichuser();
594: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
595: $env{"course.$courseid.domain"});
596: }
597:
598: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
599: if (! $modifygrades &&
600: exists($env{'request.course.sec'}) &&
601: $env{'request.course.sec'} !~ /^\s*$/) {
602: $modifygrades =
603: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
604: '/'.$env{'request.course.sec'});
605: }
606: $Apache::lonhomework::modifygrades = $modifygrades;
607:
608: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
609: if (! $queuegrade &&
610: exists($env{'request.course.sec'}) &&
611: $env{'request.course.sec'} !~ /^\s*$/) {
612: $queuegrade =
613: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
614: '/'.$env{'request.course.sec'});
615: }
616: $Apache::lonhomework::queuegrade = $queuegrade;
617: return '';
618: }
619:
620: sub unset_permissions {
621: undef($Apache::lonhomework::queuegrade);
622: undef($Apache::lonhomework::modifygrades);
623: undef($Apache::lonhomework::viewgrades);
624: undef($Apache::lonhomework::browse);
625: }
626:
627: sub setupheader {
628: my $request=$_[0];
629: &Apache::loncommon::content_type($request,'text/html');
630: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
631: &Apache::loncommon::no_cache($request);
632: }
633: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
634: # 'lastrevisiondate'));
635: $request->send_http_header;
636: return OK if $request->header_only;
637: return ''
638: }
639:
640: sub handle_save_or_undo {
641: my ($request,$problem,$result) = @_;
642:
643: my $file = &Apache::lonnet::filelocation("",$request->uri);
644: my $filebak =$file.".bak";
645: my $filetmp =$file.".tmp";
646: my $error=0;
647: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
648: my $error=0;
649: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
650: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
651: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
652: if (!$error) {
653: &Apache::lonxml::info("<p><b>".
654: &mt("Undid changes, Switched [_1] and [_2]",
655: '<span class="LC_filename">'.$filebak.
656: '</span>',
657: '<span class="LC_filename">'.$file.
658: '</span>')."</b></p>");
659: } else {
660: &Apache::lonxml::info("<p><span class=\"LC_error\">".
661: &mt("Unable to undo, unable to switch [_1] and [_2]",
662: '<span class="LC_filename">'.
663: $filebak.'</span>',
664: '<span class="LC_filename">'.
665: $file.'</span>')."</span></p>");
666: $error=1;
667: }
668: } else {
669: &Apache::lonnet::correct_line_ends($result);
670:
671: my $fs=Apache::File->new(">$filebak");
672: if (defined($fs)) {
673: print $fs $$problem;
674: } else {
675: &Apache::lonxml::info("<span class=\"LC_error\">".
676: &mt("Unable to make backup [_1]",
677: '<span class="LC_filename">'.
678: $filebak.'</span>')."</span>");
679: $error=2;
680: }
681: my $fh=Apache::File->new(">$file");
682: if (defined($fh)) {
683: print $fh $$result;
684: } else {
685: &Apache::lonxml::info('<span class="LC_error">'.
686: &mt("Unable to write to [_1]",
687: '<span class="LC_filename">'.
688: $file.'</span>').
689: '</span>');
690: $error|=4;
691: }
692: }
693: return $error;
694: }
695:
696: sub analyze_header {
697: my ($request) = @_;
698: my $js = &Apache::structuretags::setmode_javascript();
699:
700: # Breadcrumbs
701: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
702: 'text' => 'Construction Space'},
703: {'href' => '',
704: 'text' => 'Problem Testing'},
705: {'href' => '',
706: 'text' => 'Analyzing a problem'}];
707:
708: my $result =
709: &Apache::loncommon::start_page('Analyzing a problem',
710: $js,
711: {'bread_crumbs' => $brcrum,})
712: .&Apache::loncommon::head_subbox(
713: &Apache::loncommon::CSTR_pageheader());
714: $result .=
715: &Apache::lonxml::message_location().'
716: <form name="lonhomework" method="post" action="'.
717: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
718: '<input type="hidden" name="problemmode" value="'.
719: $env{'form.problemmode'}.'" />'.
720: &Apache::structuretags::remember_problem_state().'
721: <div class="LC_edit_problem_analyze_header">
722: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
723: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
724: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
725: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
726: <hr />
727: <input type="button" name="submitmode" value="'.&mt("View").'" '.
728: 'onclick="javascript:setmode(this.form,'."'view'".')" />
729: <hr />
730: </div>
731: </form>';
732: &Apache::lonxml::add_messages(\$result);
733: $request->print($result);
734: $request->rflush();
735: }
736:
737: sub analyze_footer {
738: my ($request) = @_;
739: $request->print(&Apache::loncommon::end_page());
740: $request->rflush();
741: }
742:
743: sub analyze {
744: my ($request,$file) = @_;
745: &Apache::lonxml::debug("Analyze");
746: my $result;
747: my %overall;
748: my %seedexample;
749: my %allparts;
750: my $rndseed=$env{'form.rndseed'};
751: &analyze_header($request);
752: my %prog_state=
753: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
754: &mt('Getting Problem Variants'),
755: $env{'form.numtoanalyze'},
756: 'inline',undef);
757: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
758: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
759: &mt('last problem'));
760: if (&Apache::loncommon::connection_aborted($request)) { return; }
761: my $thisseed=$i+$rndseed;
762: my $subresult=&Apache::lonnet::ssi($request->uri,
763: ('grade_target' => 'analyze'),
764: ('rndseed' => $thisseed));
765: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
766: my %analyze=&Apache::lonnet::str2hash($subresult);
767: my @parts;
768: if (defined(@{ $analyze{'parts'} })) {
769: @parts=@{ $analyze{'parts'} };
770: }
771: foreach my $part (@parts) {
772: if (!exists($allparts{$part})) {$allparts{$part}=1;};
773: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
774: $analyze{$part.'.type'} eq 'stringresponse' ||
775: $analyze{$part.'.type'} eq 'formularesponse' ) {
776: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
777: my $i=0;
778: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
779: push( @{ $overall{$part.'.answer'}[$i] },
780: $answer_part);
781: my $concatanswer= join("\0",@{ $answer_part });
782: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
783: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
784: }
785: $seedexample{join("\0",$part,$i,@{$answer_part})}=
786: $thisseed;
787: $i++;
788: }
789: }
790: if (!keys(%{ $analyze{$part.'.answer'} })) {
791: my $answer_part =
792: ['<span class="LC_error">'.&mt('Error').'</span>'];
793: $seedexample{join("\0",$part,0,@{$answer_part})}=
794: $thisseed;
795: push( @{ $overall{$part.'.answer'}[0] },
796: $answer_part);
797: }
798: }
799: }
800: }
801: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
802: &mt('Analyzing Results'));
803: $request->print('<hr />'
804: .'<h3>'
805: .&mt('List of possible answers')
806: .'</h3>'
807: );
808: foreach my $part (sort(keys(%allparts))) {
809: if (defined(@{ $overall{$part.'.answer'} })) {
810: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
811: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
812: $request->print(&Apache::loncommon::start_data_table()
813: .&Apache::loncommon::start_data_table_header_row()
814: .'<th colspan="'.($num_cols+1).'">'
815: .&mt('Part').' '.$part
816: );
817: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
818: $request->print(' '.&mt('Answer [_1]',$i+1));
819: }
820: $request->print('</th>'
821: .&Apache::loncommon::end_data_table_header_row()
822: );
823: my %frequency;
824: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
825: $frequency{join("\0",@{ $answer })}++;
826: }
827: $request->print(&Apache::loncommon::start_data_table_header_row()
828: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
829: .'<th>'.&mt('Frequency').'<br />'
830: .'('.&mt('click for example').')</th>'
831: .&Apache::loncommon::end_data_table_header_row()
832: );
833: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
834: $request->print(&Apache::loncommon::start_data_table_row()
835: .'<td>'
836: .join('</td><td>',split("\0",$answer))
837: .'</td>'
838: .'<td>'
839: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
840: .'</td>'
841: .&Apache::loncommon::end_data_table_row()
842: );
843: }
844: $request->print(&Apache::loncommon::end_data_table());
845: }
846: } else {
847: $request->print('<p class="LC_warning">'
848: .&mt('Response [_1] is not analyzable at this time.',$part)
849: .'</p>'
850: );
851: }
852: }
853: if (scalar(keys(%allparts)) == 0 ) {
854: $request->print('<p class="LC_warning">'
855: .&mt('Found no analyzable responses in this problem.'
856: .' Currently only Numerical, Formula and String response styles are supported.')
857: .'</p>'
858: );
859: }
860: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
861: &analyze_footer($request);
862: &Apache::lonhomework::showhash(%overall);
863: return $result;
864: }
865:
866: {
867: my $show_problem_status;
868: sub reset_show_problem_status {
869: undef($show_problem_status);
870: }
871:
872: sub set_show_problem_status {
873: my ($new_status) = @_;
874: $show_problem_status = lc($new_status);
875: }
876:
877: sub hide_problem_status {
878: return ($show_problem_status eq 'no'
879: || $show_problem_status eq 'no_feedback_ever');
880: }
881:
882: sub show_problem_status {
883: return ($show_problem_status eq 'yes'
884: || $show_problem_status eq 'answer'
885: || $show_problem_status eq '');
886: }
887:
888: sub show_some_problem_status {
889: return ($show_problem_status eq 'no');
890: }
891:
892: sub show_no_problem_status {
893: return ($show_problem_status eq 'no_feedback_ever');
894: }
895:
896: sub show_answer_problem_status {
897: return ($show_problem_status eq 'answer');
898: }
899: }
900:
901: sub editxmlmode {
902: my ($request,$file) = @_;
903: my $result;
904: my $problem=&Apache::lonnet::getfile($file);
905: if ($problem eq -1) {
906: &Apache::lonxml::error(
907: '<p class="LC_error">'
908: .&mt('Unable to find [_1]',
909: '<span class="LC_filename">'.$file.'</span>')
910: .'</p>');
911:
912: $problem='';
913: }
914:
915: if (($env{'form.problemmode'} eq 'saveeditxml') ||
916: ($env{'form.problemmode'} eq 'saveviewxml') ||
917: ($env{'form.problemmode'} eq 'undoxml')) {
918: my $error=&handle_save_or_undo($request,\$problem,
919: \$env{'form.editxmltext'});
920: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
921: }
922: &Apache::lonhomework::showhashsubset(\%env,'^form');
923: if ($env{'form.problemmode'} eq 'saveviewxml') {
924: &Apache::lonhomework::showhashsubset(\%env,'^form');
925: $env{'form.problemmode'}='view';
926: &renderpage($request,$file);
927: } else {
928: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
929: if ($cols > 80) { $cols = 80; }
930: if ($cols < 70) { $cols = 70; }
931: if ($rows < 20) { $rows = 20; }
932: my $js =
933: &Apache::edit::js_change_detection().
934: &Apache::loncommon::resize_textarea_js().
935: &Apache::structuretags::setmode_javascript().
936: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
937:
938: # Breadcrumbs
939: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
940: 'text' => 'Construction Space'},
941: {'href' => '',
942: 'text' => 'Problem Editing'}];
943:
944: my $start_page =
945: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
946: {'no_auto_mt_title' => 1,
947: 'only_body' => 0,
948: 'add_entries' => {
949: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
950: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
951: },
952: 'bread_crumbs' => $brcrum,
953: });
954:
955: $result=$start_page
956: .&Apache::loncommon::head_subbox(
957: &Apache::loncommon::CSTR_pageheader());
958: $result.=&renderpage($request,$file,['no_output_web'],1).
959: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
960: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
961: &Apache::structuretags::remember_problem_state().'
962: <div class="LC_edit_problem_editxml_header">
963: <table class="LC_edit_problem_header_title"><tr><td>
964: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
965: </td><td align="right">
966: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
967: </td></tr>
968: </table>';
969:
970: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
971: &Apache::structuretags::problem_edit_buttons('editxml');
972:
973: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
974: '<textarea '.&Apache::edit::element_change_detection().
975: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
976: ' name="editxmltext" id="LC_editxmltext">'.
977: &HTML::Entities::encode($problem,'<>&"').'</textarea>
978: <div id="LC_aftertextarea">
979: </div>
980: </form>'.&Apache::loncommon::end_page();
981: &Apache::lonxml::add_messages(\$result);
982: $request->print($result);
983: }
984: return '';
985: }
986:
987: #
988: # Render the page in whatever target desired.
989: #
990: sub renderpage {
991: my ($request,$file,$targets,$return_string) = @_;
992:
993: my @targets = @{$targets || [&get_target()]};
994: &Apache::lonhomework::showhashsubset(\%env,'form.');
995: &Apache::lonxml::debug("Running targets ".join(':',@targets));
996:
997: my $overall_result;
998: foreach my $target (@targets) {
999: # FIXME need to do something intelligent when a problem goes
1000: # from viewable to not viewable due to map conditions
1001: #&setuppermissions();
1002: #if ( $Apache::lonhomework::browse ne '2'
1003: # && $Apache::lonhomework::browse ne 'F' ) {
1004: # $request->print(" You most likely shouldn't see me.");
1005: #}
1006: #my $t0 = [&gettimeofday()];
1007: my $output=1;
1008: if ($target eq 'no_output_web') {
1009: $target = 'web'; $output=0;
1010: }
1011: my $problem=&Apache::lonnet::getfile($file);
1012: my $result;
1013: if ($problem eq -1) {
1014: $problem='';
1015: my $filename=(split('/',$file))[-1];
1016: my $error =
1017: '<p class="LC_error">'
1018: .&mt('Unable to find [_1]',
1019: '<span class="LC_filename">'.$filename.'</span>')
1020: ."</p>";
1021: $result.=
1022: &Apache::loncommon::simple_error_page($request,'Not available',
1023: $error);
1024: return;
1025: }
1026:
1027: my %mystyle;
1028: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1029: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1030: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1031:
1032: &Apache::lonxml::debug("Should be parsing now");
1033: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1034: &setup_vars($target),%mystyle);
1035: &finished_parsing();
1036: if (!$output) { $result = ''; }
1037: #$request->print("Result follows:");
1038: if ($target eq 'modified') {
1039: &handle_save_or_undo($request,\$problem,\$result);
1040: } else {
1041: if ($target eq 'analyze') {
1042: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1043: undef(%Apache::lonhomework::analyze);
1044: }
1045: #my $td=&tv_interval($t0);
1046: #if ( $Apache::lonxml::debug) {
1047: #$result =~ s:</body>::;
1048: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1049: #}
1050: # $request->print($result);
1051: $overall_result.=$result;
1052: # $request->rflush();
1053: }
1054: #$request->print(":Result ends");
1055: #my $td=&tv_interval($t0);
1056: }
1057: if (!$return_string) {
1058: &Apache::lonxml::add_messages(\$overall_result);
1059: $request->print($overall_result);
1060: $request->rflush();
1061: } else {
1062: return $overall_result;
1063: }
1064: }
1065:
1066: sub finished_parsing {
1067: undef($Apache::lonhomework::parsing_a_problem);
1068: undef($Apache::lonhomework::parsing_a_task);
1069: }
1070:
1071: sub get_template_list {
1072: my ($extension) = @_;
1073: my $result;
1074: my @allnames;
1075: &Apache::lonxml::debug("Looking for :$extension:");
1076: my $glob_extension = $extension;
1077: if ($extension eq 'survey' || $extension eq 'exam') {
1078: $glob_extension = 'problem';
1079: }
1080: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1081: '/templates/*.'.$glob_extension);
1082: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1083: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1084: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1085: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1086: my ($midpoint,$seconddiv,$numfiles);
1087: $numfiles = 0;
1088: foreach my $file (@files) {
1089: next if ($file->[1] !~ /\S/);
1090: $numfiles ++;
1091: }
1092: if ($numfiles > 0) {
1093: $result = '<div class="LC_left_float">';
1094: $midpoint = int($numfiles/2);
1095: if ($numfiles%2) {
1096: $midpoint ++;
1097: }
1098: }
1099: my $count = 0;
1100: my $currentcategory='';
1101: my $first = 1;
1102: my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
1103: foreach my $file (@files) {
1104: next if ($file->[1] !~ /\S/);
1105: if ($file->[2] ne $currentcategory) {
1106: $currentcategory=$file->[2];
1107: if ((!$seconddiv) && ($count >= $midpoint)) {
1108: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1109: $seconddiv = 1;
1110: } elsif (!$first) {
1111: $result.='</div>'."\n";
1112: } else {
1113: $first = 0;
1114: }
1115: $result.= '<div class="LC_Box">'."\n"
1116: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1117: $count++;
1118: }
1119: $result .=
1120: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1121: $file->[1].'</label>';
1122: if ($file->[3]) {
1123: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1124: }
1125: my $filename=$file->[0];
1126: $filename=~s{^\Q$londocroot\E}{};
1127: $result.=' <span class="LC_fontsize_small">'
1128: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1129: .'</span><br />'."\n";
1130: $count ++;
1131: }
1132: if ($numfiles > 0) {
1133: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1134: }
1135: return $result;
1136: }
1137:
1138: sub newproblem {
1139: my ($request) = @_;
1140:
1141: if ($env{'form.template'}) {
1142: my $file = $env{'form.template'};
1143: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1144: &File::Copy::copy($file,$dest);
1145: &renderpage($request,$dest);
1146: return;
1147: }
1148:
1149: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1150: &Apache::lonxml::debug("Looking for :$extension:");
1151: my $templatelist=&get_template_list($extension);
1152: if ($env{'form.newfile'} && !$templatelist) {
1153: # no templates found
1154: my $templatefilename =
1155: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1156: &Apache::lonxml::debug("$templatefilename");
1157: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1158: &File::Copy::copy($templatefilename,$dest);
1159: &renderpage($request,$dest);
1160: } else {
1161: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1162: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1163: my $errormsg;
1164: my $instructions;
1165: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1166: 'text' => 'Construction Space'},
1167: {'href' => '',
1168: 'text' => "Create New $extension"}];
1169: my $start_page =
1170: &Apache::loncommon::start_page("Create New $extension",
1171: undef,
1172: {'bread_crumbs' => $brcrum,});
1173: $request->print(
1174: $start_page
1175: .&Apache::loncommon::head_subbox(
1176: &Apache::loncommon::CSTR_pageheader())
1177: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1178: $errormsg
1179: ".&mt("The requested file [_1] currently does not exist.",
1180: '<span class="LC_filename">'.$url.'</span>').'
1181: <p class="LC_info">
1182: '.&mt("To create a new $extension, select a template from the".
1183: " list below. Then click on the \"Create $extension\" button.").'
1184: </p><div><form action="'.$url.'" method="post">');
1185:
1186: if (defined($templatelist)) {
1187: $request->print($templatelist);
1188: }
1189: $request->print('<br /><input type="submit" name="newfile" value="'.
1190: &mt("Create $extension").'" />');
1191: $request->print('</form></div>'.&Apache::loncommon::end_page());
1192: }
1193: return;
1194: }
1195:
1196: sub update_construct_style {
1197: if ($env{'request.state'} eq "construct"
1198: && $env{'form.problemmode'} eq 'view'
1199: && defined($env{'form.submitted'})
1200: && !defined($env{'form.resetdata'})
1201: && !defined($env{'form.newrandomization'})) {
1202: if ((!$env{'form.style_file'} && $env{'construct.style'})
1203: ||$env{'form.clear_style_file'}) {
1204: &Apache::lonnet::delenv('construct.style');
1205: } elsif ($env{'form.style_file'}
1206: && $env{'construct.style'} ne $env{'form.style_file'}) {
1207: &Apache::lonnet::appenv({'construct.style' =>
1208: $env{'form.style_file'}});
1209: }
1210: }
1211: }
1212:
1213:
1214: sub handler {
1215: #my $t0 = [&gettimeofday()];
1216: my $request=$_[0];
1217: $Apache::lonxml::request=$request;
1218: $Apache::lonxml::debug=$env{'user.debug'};
1219: $env{'request.uri'}=$request->uri;
1220: &setuppermissions();
1221:
1222: my $file=&Apache::lonnet::filelocation("",$request->uri);
1223:
1224: #check if we know where we are
1225: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1226: # if we are browsing we might not be able to know where we are
1227: if ($Apache::lonhomework::browse ne 'F' &&
1228: $env{'request.state'} ne "construct") {
1229: #should know where we are, so ask
1230: &unset_permissions();
1231: $request->internal_redirect('/adm/ambiguous');
1232: return OK;
1233: }
1234: }
1235: if (&setupheader($request)) {
1236: &unset_permissions();
1237: return OK;
1238: }
1239: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1240: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1241: my ($symb) = &Apache::lonnet::whichuser();
1242: &Apache::lonxml::debug('symb is '.$symb);
1243: if ($env{'request.state'} eq "construct") {
1244: if ( -e $file ) {
1245: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1246: ['problemmode']);
1247: if (!(defined $env{'form.problemmode'})) {
1248: #first visit to problem in construction space
1249: $env{'form.problemmode'}= 'view';
1250: &renderpage($request,$file);
1251: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1252: ($env{'form.problemmode'} eq 'saveeditxml') ||
1253: ($env{'form.problemmode'} eq 'saveviewxml') ||
1254: ($env{'form.problemmode'} eq 'undoxml')) {
1255: &editxmlmode($request,$file);
1256: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1257: &analyze($request,$file);
1258: } else {
1259: &update_construct_style();
1260: &renderpage($request,$file);
1261: }
1262: } else {
1263: # requested file doesn't exist in contruction space
1264: &newproblem($request);
1265: }
1266: } else {
1267: # just render the page normally outside of construction space
1268: &Apache::lonxml::debug("not construct");
1269: &renderpage($request,$file);
1270: }
1271: #my $td=&tv_interval($t0);
1272: #&Apache::lonxml::debug("Spent $td seconds processing");
1273: # always turn off debug messages
1274: $Apache::lonxml::debug=0;
1275: &unset_permissions();
1276: return OK;
1277:
1278: }
1279:
1280: 1;
1281: __END__
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