1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.317 2010/01/30 22:40:37 bisitz 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 ($env{'form.grade_target'});
114: }
115: if ($env{'form.webgrade'} &&
116: ($Apache::lonhomework::modifygrades eq 'F'
117: || $Apache::lonhomework::queuegrade eq 'F' )) {
118: return ('grade','webgrade');
119: }
120: if ( defined($env{'form.submitted'}) &&
121: ( !defined($env{'form.newrandomization'}))) {
122: return ('grade', 'web');
123: } else {
124: return ('web');
125: }
126: } elsif ($env{'request.state'} eq "construct") {
127: if ( defined($env{'form.grade_target'}) ) {
128: return ($env{'form.grade_target'});
129: }
130: if ( defined($env{'form.preview'})) {
131: if ( defined($env{'form.submitted'})) {
132: return ('grade', 'web');
133: } else {
134: return ('web');
135: }
136: } else {
137: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
138: #$env{'form.webgrade'} = 'yes';
139: return ('grade','webgrade','answer');
140: } elsif (($env{'form.problemmode'} eq 'view') ||
141: ($env{'form.problemmode'} eq 'discard')) {
142: if ( defined($env{'form.submitted'}) &&
143: (!defined($env{'form.resetdata'})) &&
144: (!defined($env{'form.newrandomization'}))) {
145: return ('grade', 'web','answer');
146: } else {
147: return ('web','answer');
148: }
149: } elsif ($env{'form.problemmode'} eq 'edit') {
150: if ( $env{'form.submitted'} eq 'edit' ) {
151: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
152: return ('modified','web','answer');
153: } else {
154: return ('modified','no_output_web','edit');
155: }
156: } else {
157: return ('no_output_web','edit');
158: }
159: } else {
160: return ('web');
161: }
162: }
163: }
164: return ();
165: }
166:
167: sub setup_vars {
168: my ($target) = @_;
169: return ';'
170: # return ';$external::target='.$target.';';
171: }
172:
173: sub createmenu {
174: my ($which,$request)=@_;
175: if ($which eq 'grade') {
176: $request->print('<script type="text/javascript" language="JavaScript">
177: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
178: "height=350,width=150,menubar=no");
179: </script>');
180: }
181: }
182:
183: sub proctor_checked_in {
184: my ($slot_name,$slot,$type)=@_;
185: my @possible_proctors=split(",",$slot->{'proctor'});
186:
187: return 1 if (!@possible_proctors);
188:
189: my $key;
190: if ($type eq 'Task') {
191: my $version=$Apache::lonhomework::history{'resource.0.version'};
192: $key ="resource.$version.0.checkedin";
193: } elsif ($type eq 'problem') {
194: $key ='resource.0.checkedin';
195: }
196: # backward compatability, used to be username@domain,
197: # now is username:domain
198: my $who = $Apache::lonhomework::history{$key};
199: if ($who !~ /:/) {
200: $who =~ tr/@/:/;
201: }
202: foreach my $possible (@possible_proctors) {
203: if ($who eq $possible
204: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
205: return 1;
206: }
207: }
208:
209: return 0;
210: }
211:
212: sub check_slot_access {
213: my ($id,$type)=@_;
214:
215: # does it pass normal muster
216: my ($status,$datemsg)=&check_access($id);
217:
218: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
219: if ($useslots ne 'resource' && $useslots ne 'map'
220: && $useslots ne 'map_map') {
221: return ($status,$datemsg);
222: }
223:
224: if ($status eq 'SHOW_ANSWER' ||
225: $status eq 'CLOSED' ||
226: $status eq 'INVALID_ACCESS' ||
227: $status eq 'UNAVAILABLE') {
228: return ($status,$datemsg);
229: }
230: if ($env{'request.state'} eq "construct") {
231: return ($status,$datemsg);
232: }
233:
234: if ($type eq 'Task') {
235: my $version=$Apache::lonhomework::history{'resource.version'};
236: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
237: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
238: return ('SHOW_ANSWER');
239: }
240: }
241:
242: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
243: my $available = &Apache::lonnet::EXT("resource.0.available");
244: my @slots= (split(':',$availablestudent),split(':',$available));
245:
246: # if (!@slots) {
247: # return ($status,$datemsg);
248: # }
249: my $slotstatus='NOT_IN_A_SLOT';
250: my ($returned_slot,$slot_name);
251: foreach my $slot (@slots) {
252: $slot =~ s/(^\s*|\s*$)//g;
253: &Apache::lonxml::debug("getting $slot");
254: my %slot=&Apache::lonnet::get_slot($slot);
255: &Apache::lonhomework::showhash(%slot);
256: if ($slot{'starttime'} < time &&
257: $slot{'endtime'} > time &&
258: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
259: &Apache::lonxml::debug("$slot is good");
260: $slotstatus='NEEDS_CHECKIN';
261: $returned_slot=\%slot;
262: $slot_name=$slot;
263: last;
264: }
265: }
266: if ($slotstatus eq 'NEEDS_CHECKIN' &&
267: &proctor_checked_in($slot_name,$returned_slot,$type)) {
268: &Apache::lonxml::debug("protoctor checked in");
269: $slotstatus='CAN_ANSWER';
270: }
271:
272: my ($is_correct,$got_grade,$checkedin);
273: if ($type eq 'Task') {
274: my $version=$Apache::lonhomework::history{'resource.0.version'};
275: $got_grade =
276: ($Apache::lonhomework::history{"resource.$version.0.status"}
277: =~ /^(?:pass|fail)$/);
278: $is_correct =
279: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
280: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
281: $checkedin =
282: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
283: } elsif ($type eq 'problem') {
284: $got_grade = 1;
285: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
286: $is_correct =
287: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
288: }
289:
290: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
291:
292: # no slot is currently open, and has been checked in for this version
293: # but hasn't got a grade, therefore must be awaiting a grade
294: if (!defined($slot_name)
295: && $checkedin
296: && !$got_grade) {
297: return ('WAITING_FOR_GRADE');
298: }
299:
300: # Previously used slot is no longer open, and has been checked in for this version.
301: # However, the problem is not closed, and potentially, another slot might be
302: # used to gain access to it to work on it, until the due date is reached, and the
303: # problem then becomes CLOSED. Therefore return the slotstatus -
304: # (which will be NOT_IN_SLOT).
305: if (!defined($slot_name)
306: && $checkedin
307: && $type eq 'problem') {
308: return ($slotstatus);
309: }
310:
311: if ($slotstatus eq 'NOT_IN_A_SLOT'
312: && $checkedin ) {
313:
314: if ($got_grade) {
315: return ('SHOW_ANSWER');
316: } else {
317: return ('WAITING_FOR_GRADE');
318: }
319:
320: }
321:
322: if ( $is_correct) {
323: if ($type eq 'problem') {
324: return ($status);
325: }
326: return ('SHOW_ANSWER');
327: }
328:
329: if ( $status eq 'CANNOT_ANSWER' &&
330: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
331: return ($status,$datemsg);
332: }
333:
334: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
335: }
336:
337: # JB, 9/24/2002: Any changes in this function may require a change
338: # in lonnavmaps::resource::getDateStatus.
339: sub check_access {
340: my ($id) = @_;
341: my $date ='';
342: my $status;
343: my $datemsg = '';
344: my $lastdate = '';
345: my $type;
346: my $passed;
347:
348: if ($env{'request.state'} eq "construct") {
349: if ($env{'form.problemstate'}) {
350: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
351: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
352: && &hide_problem_status())) {
353: return ('CANNOT_ANSWER',
354: &mt('is in this state due to author settings.'));
355: }
356: } else {
357: return ($env{'form.problemstate'},
358: &mt('is in this state due to author settings.'));
359: }
360: }
361: &Apache::lonxml::debug("in construction ignoring dates");
362: $status='CAN_ANSWER';
363: $datemsg=&mt('is in under construction');
364: # return ($status,$datemsg);
365: }
366:
367: &Apache::lonxml::debug("checking for part :$id:");
368: &Apache::lonxml::debug("time:".time);
369:
370: my ($symb)=&Apache::lonnet::whichuser();
371: &Apache::lonxml::debug("symb:".$symb);
372: #if ($env{'request.state'} ne "construct" && $symb ne '') {
373: if ($env{'request.state'} ne "construct") {
374: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
375: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
376: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
377: $status='INVALID_ACCESS';
378: $date=&mt("can not be accessed from your location.");
379: return($status,$date);
380: }
381:
382: foreach my $temp ("opendate","duedate","answerdate") {
383: $lastdate = $date;
384: if ($temp eq 'duedate') {
385: $date = &due_date($id);
386: } else {
387: $date = &Apache::lonnet::EXT("resource.$id.$temp");
388: }
389:
390: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
391: if ($thistype =~ /^(con_lost|no_such_host)/ ||
392: $date =~ /^(con_lost|no_such_host)/) {
393: $status='UNAVAILABLE';
394: $date=&mt("may open later.");
395: return($status,$date);
396: }
397: if ($thistype eq 'date_interval') {
398: if ($temp eq 'opendate') {
399: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
400: }
401: if ($temp eq 'answerdate') {
402: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
403: }
404: }
405: &Apache::lonxml::debug("found :$date: for :$temp:");
406: if ($date eq '') {
407: $date = &mt("an unknown date"); $passed = 0;
408: } elsif ($date eq 'con_lost') {
409: $date = &mt("an indeterminate date"); $passed = 0;
410: } else {
411: if (time < $date) { $passed = 0; } else { $passed = 1; }
412: $date = &Apache::lonlocal::locallocaltime($date);
413: }
414: if (!$passed) { $type=$temp; last; }
415: }
416: &Apache::lonxml::debug("have :$type:$passed:");
417: if ($passed) {
418: $status='SHOW_ANSWER';
419: $datemsg=$date;
420: } elsif ($type eq 'opendate') {
421: $status='CLOSED';
422: $datemsg = &mt("will open on")." $date";
423: } elsif ($type eq 'duedate') {
424: $status='CAN_ANSWER';
425: $datemsg = &mt("is due at")." $date";
426: } elsif ($type eq 'answerdate') {
427: $status='CLOSED';
428: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
429: }
430: }
431: if ($status eq 'CAN_ANSWER' ||
432: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
433: #check #tries, and if correct.
434: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
435: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
436: if ( $tries eq '' ) { $tries = '0'; }
437: if ( $maxtries eq '' &&
438: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
439: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
440: # if (correct and show prob status) or excused then CANNOT_ANSWER
441: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
442: &&
443: &show_problem_status())
444: ||
445: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
446: $status = 'CANNOT_ANSWER';
447: }
448: if ($status eq 'CANNOT_ANSWER'
449: && &show_answer_problem_status()) {
450: $status = 'SHOW_ANSWER';
451: }
452: }
453: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
454: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
455: &Apache::lonxml::debug("looking for interval @interval");
456: if ($interval[0]) {
457: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
458: &Apache::lonxml::debug("looking for accesstime $first_access");
459: if (!$first_access) {
460: $status='NOT_YET_VIEWED';
461: my $due_date = &due_date($id);
462: my $seconds_left = $due_date - time;
463: if ($seconds_left > $interval[0] || $due_date eq '') {
464: $seconds_left = $interval[0];
465: }
466: $datemsg=&seconds_to_human_length($seconds_left);
467: }
468: }
469: }
470:
471: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
472: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
473: # return ('UNCHECKEDOUT','needs to be checked out');
474: #}
475:
476:
477: &Apache::lonxml::debug("sending back :$status:$datemsg:");
478: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
479: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
480: $status='CAN_ANSWER';
481: $datemsg=&mt('is closed but you are allowed to view it');
482: }
483:
484: return ($status,$datemsg);
485: }
486: # this should work exactly like the copy in lonnavmaps.pm
487: sub due_date {
488: my ($part_id,$symb,$udom,$uname)=@_;
489: my $date;
490: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
491: $udom,$uname);
492: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
493: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
494: $udom,$uname);
495: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
496: if ($interval[0] =~ /\d+/) {
497: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
498: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
499: if (defined($first_access)) {
500: my $interval = $first_access+$interval[0];
501: $date = (!$due_date || $interval < $due_date) ? $interval
502: : $due_date;
503: } else {
504: $date = $due_date;
505: }
506: } else {
507: $date = $due_date;
508: }
509: return $date
510: }
511:
512: sub seconds_to_human_length {
513: my ($length)=@_;
514:
515: my $seconds=$length%60; $length=int($length/60);
516: my $minutes=$length%60; $length=int($length/60);
517: my $hours=$length%24; $length=int($length/24);
518: my $days=$length;
519:
520: my $timestr;
521: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
522: if ($hours > 0) { $timestr.=($timestr?", ":"").
523: &mt('[quant,_1,hour]',$hours); }
524: if ($minutes > 0) { $timestr.=($timestr?", ":"").
525: &mt('[quant,_1,minute]',$minutes); }
526: if ($seconds > 0) { $timestr.=($timestr?", ":"").
527: &mt('[quant,_1,second]',$seconds); }
528: return $timestr;
529: }
530:
531: sub showhash {
532: my (%hash) = @_;
533: &showhashsubset(\%hash,'.');
534: return '';
535: }
536:
537: sub showarray {
538: my ($array)=@_;
539: my $string="(";
540: foreach my $elm (@{ $array }) {
541: if (ref($elm) eq 'ARRAY') {
542: $string.=&showarray($elm);
543: } elsif (ref($elm) eq 'HASH') {
544: $string.= "HASH --- \n<br />";
545: $string.= &showhashsubset($elm,'.');
546: } else {
547: $string.="$elm,"
548: }
549: }
550: chop($string);
551: $string.=")";
552: return $string;
553: }
554:
555: sub showhashsubset {
556: my ($hash,$keyre) = @_;
557: my $resultkey;
558: foreach $resultkey (sort keys %$hash) {
559: if ($resultkey !~ /$keyre/) { next; }
560: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
561: &Apache::lonxml::debug("$resultkey ---- ".
562: &showarray($$hash{$resultkey}));
563: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
564: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
565: &showhashsubset($$hash{$resultkey},'.');
566: } else {
567: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
568: }
569: }
570: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
571: return '';
572: }
573:
574: sub setuppermissions {
575: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
576: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
577: if (! $viewgrades &&
578: exists($env{'request.course.sec'}) &&
579: $env{'request.course.sec'} !~ /^\s*$/) {
580: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
581: '/'.$env{'request.course.sec'});
582: }
583: $Apache::lonhomework::viewgrades = $viewgrades;
584:
585: if ($Apache::lonhomework::browse eq 'F' &&
586: $env{'form.devalidatecourseresdata'} eq 'on') {
587: my (undef,$courseid) = &Apache::lonnet::whichuser();
588: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
589: $env{"course.$courseid.domain"});
590: }
591:
592: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
593: if (! $modifygrades &&
594: exists($env{'request.course.sec'}) &&
595: $env{'request.course.sec'} !~ /^\s*$/) {
596: $modifygrades =
597: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
598: '/'.$env{'request.course.sec'});
599: }
600: $Apache::lonhomework::modifygrades = $modifygrades;
601:
602: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
603: if (! $queuegrade &&
604: exists($env{'request.course.sec'}) &&
605: $env{'request.course.sec'} !~ /^\s*$/) {
606: $queuegrade =
607: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
608: '/'.$env{'request.course.sec'});
609: }
610: $Apache::lonhomework::queuegrade = $queuegrade;
611: return '';
612: }
613:
614: sub unset_permissions {
615: undef($Apache::lonhomework::queuegrade);
616: undef($Apache::lonhomework::modifygrades);
617: undef($Apache::lonhomework::viewgrades);
618: undef($Apache::lonhomework::browse);
619: }
620:
621: sub setupheader {
622: my $request=$_[0];
623: &Apache::loncommon::content_type($request,'text/html');
624: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
625: &Apache::loncommon::no_cache($request);
626: }
627: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
628: # 'lastrevisiondate'));
629: $request->send_http_header;
630: return OK if $request->header_only;
631: return ''
632: }
633:
634: sub handle_save_or_undo {
635: my ($request,$problem,$result) = @_;
636: my $file = &Apache::lonnet::filelocation("",$request->uri);
637: my $filebak =$file.".bak";
638: my $filetmp =$file.".tmp";
639: my $error=0;
640: if ($env{'form.Undo'} eq &mt('undo')) {
641: my $error=0;
642: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
643: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
644: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
645: if (!$error) {
646: &Apache::lonxml::info("<p><b>".
647: &mt("Undid changes, Switched [_1] and [_2]",
648: '<span class="LC_filename">'.$filebak.
649: '</span>',
650: '<span class="LC_filename">'.$file.
651: '</span>')."</b></p>");
652: } else {
653: &Apache::lonxml::info("<p><span class=\"LC_error\">".
654: &mt("Unable to undo, unable to switch [_1] and [_2]",
655: '<span class="LC_filename">'.
656: $filebak.'</span>',
657: '<span class="LC_filename">'.
658: $file.'</span>')."</span></p>");
659: $error=1;
660: }
661: } else {
662: &Apache::lonnet::correct_line_ends($result);
663: my $fs=Apache::File->new(">$filebak");
664: if (defined($fs)) {
665: print $fs $$problem;
666: } else {
667: &Apache::lonxml::info("<span class=\"LC_error\">".
668: &mt("Unable to make backup [_1]",
669: '<span class="LC_filename">'.
670: $filebak.'</span>')."</span>");
671: $error=2;
672: }
673: my $fh=Apache::File->new(">$file");
674: if (defined($fh)) {
675: print $fh $$result;
676: } else {
677: &Apache::lonxml::info('<span class="LC_error">'.
678: &mt("Unable to write to [_1]",
679: '<span class="LC_filename">'.
680: $file.'</span>').
681: '</span>');
682: $error|=4;
683: }
684: }
685: return $error;
686: }
687:
688: sub analyze_header {
689: my ($request) = @_;
690: my $js = &Apache::structuretags::setmode_javascript();
691:
692: # Breadcrumbs
693: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
694: 'text' => 'Construction Space'},
695: {'href' => '',
696: 'text' => 'Problem Testing'},
697: {'href' => '',
698: 'text' => 'Analyzing a problem'}];
699:
700: my $result =
701: &Apache::loncommon::start_page('Analyzing a problem',
702: $js,
703: {'bread_crumbs' => $brcrum,})
704: .&Apache::loncommon::head_subbox(
705: &Apache::loncommon::CSTR_pageheader());
706: $result .=
707: &Apache::lonxml::message_location().'
708: <form name="lonhomework" method="post" action="'.
709: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
710: '<input type="hidden" name="problemmode" value="'.
711: $env{'form.problemmode'}.'" />'.
712: &Apache::structuretags::remember_problem_state().'
713: <div class="LC_edit_problem_analyze_header">
714: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
715: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
716: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
717: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
718: <hr />
719: <input type="button" name="submitmode" value="'.&mt("View").'" '.
720: 'onclick="javascript:setmode(this.form,'."'view'".')" />
721: <hr />
722: </div>
723: </form>';
724: &Apache::lonxml::add_messages(\$result);
725: $request->print($result);
726: $request->rflush();
727: }
728:
729: sub analyze_footer {
730: my ($request) = @_;
731: $request->print(&Apache::loncommon::end_page());
732: $request->rflush();
733: }
734:
735: sub analyze {
736: my ($request,$file) = @_;
737: &Apache::lonxml::debug("Analyze");
738: my $result;
739: my %overall;
740: my %seedexample;
741: my %allparts;
742: my $rndseed=$env{'form.rndseed'};
743: &analyze_header($request);
744: my %prog_state=
745: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
746: &mt('Getting Problem Variants'),
747: $env{'form.numtoanalyze'},
748: 'inline',undef);
749: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
750: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
751: &mt('last problem'));
752: if (&Apache::loncommon::connection_aborted($request)) { return; }
753: my $thisseed=$i+$rndseed;
754: my $subresult=&Apache::lonnet::ssi($request->uri,
755: ('grade_target' => 'analyze'),
756: ('rndseed' => $thisseed));
757: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
758: my %analyze=&Apache::lonnet::str2hash($subresult);
759: my @parts;
760: if (defined(@{ $analyze{'parts'} })) {
761: @parts=@{ $analyze{'parts'} };
762: }
763: foreach my $part (@parts) {
764: if (!exists($allparts{$part})) {$allparts{$part}=1;};
765: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
766: $analyze{$part.'.type'} eq 'stringresponse' ||
767: $analyze{$part.'.type'} eq 'formularesponse' ) {
768: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
769: my $i=0;
770: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
771: push( @{ $overall{$part.'.answer'}[$i] },
772: $answer_part);
773: my $concatanswer= join("\0",@{ $answer_part });
774: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
775: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
776: }
777: $seedexample{join("\0",$part,$i,@{$answer_part})}=
778: $thisseed;
779: $i++;
780: }
781: }
782: if (!keys(%{ $analyze{$part.'.answer'} })) {
783: my $answer_part =
784: ['<span class="LC_error">'.&mt('Error').'</span>'];
785: $seedexample{join("\0",$part,0,@{$answer_part})}=
786: $thisseed;
787: push( @{ $overall{$part.'.answer'}[0] },
788: $answer_part);
789: }
790: }
791: }
792: }
793: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
794: &mt('Analyzing Results'));
795: $request->print('<hr />'
796: .'<h3>'
797: .&mt('List of possible answers')
798: .'</h3>'
799: );
800: foreach my $part (sort(keys(%allparts))) {
801: if (defined(@{ $overall{$part.'.answer'} })) {
802: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
803: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
804: $request->print(&Apache::loncommon::start_data_table()
805: .&Apache::loncommon::start_data_table_header_row()
806: .'<th colspan="'.($num_cols+1).'">'
807: .&mt('Part').' '.$part
808: );
809: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
810: $request->print(' '.&mt('Answer [_1]',$i+1));
811: }
812: $request->print('</th>'
813: .&Apache::loncommon::end_data_table_header_row()
814: );
815: my %frequency;
816: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
817: $frequency{join("\0",@{ $answer })}++;
818: }
819: $request->print(&Apache::loncommon::start_data_table_header_row()
820: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
821: .'<th>'.&mt('Frequency').'<br />'
822: .'('.&mt('click for example').')</th>'
823: .&Apache::loncommon::end_data_table_header_row()
824: );
825: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
826: $request->print(&Apache::loncommon::start_data_table_row()
827: .'<td>'
828: .join('</td><td>',split("\0",$answer))
829: .'</td>'
830: .'<td>'
831: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
832: .'</td>'
833: .&Apache::loncommon::end_data_table_row()
834: );
835: }
836: $request->print(&Apache::loncommon::end_data_table());
837: }
838: } else {
839: $request->print('<p class="LC_warning">'
840: .&mt('Response [_1] is not analyzable at this time.',$part)
841: .'</p>'
842: );
843: }
844: }
845: if (scalar(keys(%allparts)) == 0 ) {
846: $request->print('<p class="LC_warning">'
847: .&mt('Found no analyzable responses in this problem.'
848: .' Currently only Numerical, Formula and String response styles are supported.')
849: .'</p>'
850: );
851: }
852: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
853: &analyze_footer($request);
854: &Apache::lonhomework::showhash(%overall);
855: return $result;
856: }
857:
858: {
859: my $show_problem_status;
860: sub reset_show_problem_status {
861: undef($show_problem_status);
862: }
863:
864: sub set_show_problem_status {
865: my ($new_status) = @_;
866: $show_problem_status = lc($new_status);
867: }
868:
869: sub hide_problem_status {
870: return ($show_problem_status eq 'no'
871: || $show_problem_status eq 'no_feedback_ever');
872: }
873:
874: sub show_problem_status {
875: return ($show_problem_status eq 'yes'
876: || $show_problem_status eq 'answer'
877: || $show_problem_status eq '');
878: }
879:
880: sub show_some_problem_status {
881: return ($show_problem_status eq 'no');
882: }
883:
884: sub show_no_problem_status {
885: return ($show_problem_status eq 'no_feedback_ever');
886: }
887:
888: sub show_answer_problem_status {
889: return ($show_problem_status eq 'answer');
890: }
891: }
892:
893: sub editxmlmode {
894: my ($request,$file) = @_;
895: my $result;
896: my $problem=&Apache::lonnet::getfile($file);
897: if ($problem eq -1) {
898: &Apache::lonxml::error(
899: '<b> '
900: .&mt('Unable to find [_1]',
901: '<span class="LC_filename">'.$file.'</span>')
902: .'</b>');
903:
904: $problem='';
905: }
906: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
907: my $error=&handle_save_or_undo($request,\$problem,
908: \$env{'form.editxmltext'});
909: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
910: }
911: &Apache::lonhomework::showhashsubset(\%env,'^form');
912: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
913: &Apache::lonhomework::showhashsubset(\%env,'^form');
914: $env{'form.problemmode'}='view';
915: &renderpage($request,$file);
916: } else {
917: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
918: if ($cols > 80) { $cols = 80; }
919: if ($cols < 70) { $cols = 70; }
920: if ($rows < 20) { $rows = 20; }
921: my $js =
922: &Apache::edit::js_change_detection().
923: &Apache::loncommon::resize_textarea_js().
924: &Apache::structuretags::setmode_javascript().
925: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
926: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
927: my $dragmath_button =
928: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
929:
930: # Breadcrumbs
931: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
932: 'text' => 'Construction Space'},
933: {'href' => '',
934: 'text' => 'Problem Editing'}];
935:
936: my $start_page =
937: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
938: {'no_auto_mt_title' => 1,
939: 'only_body' => $only_body,
940: 'add_entries' => {
941: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
942: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
943: },
944: 'bread_crumbs' => $brcrum,
945: });
946:
947: $result=$start_page
948: .&Apache::loncommon::head_subbox(
949: &Apache::loncommon::CSTR_pageheader());
950: $result.=&renderpage($request,$file,['no_output_web'],1).
951: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
952: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
953: &Apache::structuretags::remember_problem_state().'
954: <div class="LC_edit_problem_editxml_header">
955: <table class="LC_edit_problem_header_title"><tr><td>
956: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
957: </td><td align="right">
958: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
959: </td></tr>
960: </table>
961: <div class="LC_edit_problem_discards">
962: <input type="hidden" name="problemmode" value="editxml" />
963:
964: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
965: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
966: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
967: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
968: '.$dragmath_button.'
969: </div>
970: <div class="LC_edit_problem_saves">
971: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
972: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
973: </div>
974: <hr style="clear:both;" />
975: '.&Apache::lonxml::message_location().'
976: </div>
977: ' . '
978: <textarea '.&Apache::edit::element_change_detection().
979: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
980: ' name="editxmltext" id="LC_editxmltext">'.
981: &HTML::Entities::encode($problem,'<>&"').'</textarea>
982: <div id="LC_aftertextarea">
983: </div>
984: </form>'.&Apache::loncommon::end_page();
985: &Apache::lonxml::add_messages(\$result);
986: $request->print($result);
987: }
988: return '';
989: }
990:
991: #
992: # Render the page in whatever target desired.
993: #
994: sub renderpage {
995: my ($request,$file,$targets,$return_string) = @_;
996:
997: my @targets = @{$targets || [&get_target()]};
998: &Apache::lonhomework::showhashsubset(\%env,'form.');
999: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1000:
1001: my $overall_result;
1002: foreach my $target (@targets) {
1003: # FIXME need to do something intelligent when a problem goes
1004: # from viewable to not viewable due to map conditions
1005: #&setuppermissions();
1006: #if ( $Apache::lonhomework::browse ne '2'
1007: # && $Apache::lonhomework::browse ne 'F' ) {
1008: # $request->print(" You most likely shouldn't see me.");
1009: #}
1010: #my $t0 = [&gettimeofday()];
1011: my $output=1;
1012: if ($target eq 'no_output_web') {
1013: $target = 'web'; $output=0;
1014: }
1015: my $problem=&Apache::lonnet::getfile($file);
1016: my $result;
1017: if ($problem eq -1) {
1018: $problem='';
1019: my $filename=(split('/',$file))[-1];
1020: my $error =
1021: "<b> ".&mt('Unable to find [_1]',
1022: '<span class="LC_filename">'.$filename.'</span>')
1023: ."</b>";
1024: $result.=
1025: &Apache::loncommon::simple_error_page($request,'Not available',
1026: $error);
1027: return;
1028: }
1029:
1030: my %mystyle;
1031: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1032: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1033: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1034:
1035: &Apache::lonxml::debug("Should be parsing now");
1036: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1037: &setup_vars($target),%mystyle);
1038: &finished_parsing();
1039: if (!$output) { $result = ''; }
1040: #$request->print("Result follows:");
1041: if ($target eq 'modified') {
1042: &handle_save_or_undo($request,\$problem,\$result);
1043: } else {
1044: if ($target eq 'analyze') {
1045: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1046: undef(%Apache::lonhomework::analyze);
1047: }
1048: #my $td=&tv_interval($t0);
1049: #if ( $Apache::lonxml::debug) {
1050: #$result =~ s:</body>::;
1051: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1052: #}
1053: # $request->print($result);
1054: $overall_result.=$result;
1055: # $request->rflush();
1056: }
1057: #$request->print(":Result ends");
1058: #my $td=&tv_interval($t0);
1059: }
1060: if (!$return_string) {
1061: &Apache::lonxml::add_messages(\$overall_result);
1062: $request->print($overall_result);
1063: $request->rflush();
1064: } else {
1065: return $overall_result;
1066: }
1067: }
1068:
1069: sub finished_parsing {
1070: undef($Apache::lonhomework::parsing_a_problem);
1071: undef($Apache::lonhomework::parsing_a_task);
1072: }
1073:
1074: sub get_template_list {
1075: my ($extension) = @_;
1076: my $result;
1077: my @allnames;
1078: &Apache::lonxml::debug("Looking for :$extension:");
1079: my $glob_extension = $extension;
1080: if ($extension eq 'survey' || $extension eq 'exam') {
1081: $glob_extension = 'problem';
1082: }
1083: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1084: '/templates/*.'.$glob_extension);
1085: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1086: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1087: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1088: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1089: my ($midpoint,$seconddiv,$numfiles);
1090: $numfiles = 0;
1091: foreach my $file (@files) {
1092: next if ($file->[1] !~ /\S/);
1093: $numfiles ++;
1094: }
1095: if ($numfiles > 0) {
1096: $result = '<div class="LC_left_float">';
1097: $midpoint = int($numfiles/2);
1098: if ($numfiles%2) {
1099: $midpoint ++;
1100: }
1101: }
1102: my $count = 0;
1103: my $currentcategory='';
1104: my $first = 1;
1105: foreach my $file (@files) {
1106: next if ($file->[1] !~ /\S/);
1107: if ($file->[2] ne $currentcategory) {
1108: $currentcategory=$file->[2];
1109: if ((!$seconddiv) && ($count >= $midpoint)) {
1110: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1111: $seconddiv = 1;
1112: } elsif (!$first) {
1113: $result.='</div>'."\n";
1114: } else {
1115: $first = 0;
1116: }
1117: $result.= '<div class="LC_Box">'."\n"
1118: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1119: $count++;
1120: }
1121: $result .=
1122: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1123: $file->[1].'</label>';
1124: if ($file->[3]) {
1125: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1126: }
1127: my $filename=$file->[0];
1128: $filename=~s/^\/home\/httpd\/html//;
1129: $result.=' <span class="LC_fontsize_small">'
1130: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1131: .'</span><br />'."\n";
1132: $count ++;
1133: }
1134: if ($numfiles > 0) {
1135: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1136: }
1137: return $result;
1138: }
1139:
1140: sub newproblem {
1141: my ($request) = @_;
1142:
1143: if ($env{'form.template'}) {
1144: my $file = $env{'form.template'};
1145: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1146: &File::Copy::copy($file,$dest);
1147: &renderpage($request,$dest);
1148: return;
1149: }
1150:
1151: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1152: &Apache::lonxml::debug("Looking for :$extension:");
1153: my $templatelist=&get_template_list($extension);
1154: if ($env{'form.newfile'} && !$templatelist) {
1155: # no templates found
1156: my $templatefilename =
1157: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1158: &Apache::lonxml::debug("$templatefilename");
1159: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1160: &File::Copy::copy($templatefilename,$dest);
1161: &renderpage($request,$dest);
1162: } else {
1163: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1164: my $shownurl=$url;
1165: $shownurl=~s-^/~-/priv/-;
1166: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1167: my $errormsg;
1168: my $instructions;
1169: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1170: 'text' => 'Construction Space'},
1171: {'href' => '',
1172: 'text' => "Create New $extension"}];
1173: my $start_page =
1174: &Apache::loncommon::start_page("Create New $extension",
1175: undef,
1176: {'bread_crumbs' => $brcrum,});
1177: $request->print(
1178: $start_page
1179: .&Apache::loncommon::head_subbox(
1180: &Apache::loncommon::CSTR_pageheader())
1181: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1182: $errormsg
1183: ".&mt("The requested file [_1] currently does not exist.",
1184: '<span class="LC_filename">'.$shownurl.'</span>').'
1185: <p class="LC_info">
1186: '.&mt("To create a new $extension, select a template from the".
1187: " list below. Then click on the \"Create $extension\" button.").'
1188: </p><div><form action="'.$url.'" method="post">');
1189:
1190: if (defined($templatelist)) {
1191: $request->print($templatelist);
1192: }
1193: $request->print('<br /><input type="submit" name="newfile" value="'.
1194: &mt("Create $extension").'" />');
1195: $request->print('</form></div>'.&Apache::loncommon::end_page());
1196: }
1197: return;
1198: }
1199:
1200: sub update_construct_style {
1201: if ($env{'request.state'} eq "construct"
1202: && $env{'form.problemmode'} eq 'view'
1203: && defined($env{'form.submitted'})
1204: && !defined($env{'form.resetdata'})
1205: && !defined($env{'form.newrandomization'})) {
1206: if ((!$env{'form.style_file'} && $env{'construct.style'})
1207: ||$env{'form.clear_style_file'}) {
1208: &Apache::lonnet::delenv('construct.style');
1209: } elsif ($env{'form.style_file'}
1210: && $env{'construct.style'} ne $env{'form.style_file'}) {
1211: &Apache::lonnet::appenv({'construct.style' =>
1212: $env{'form.style_file'}});
1213: }
1214: }
1215: }
1216:
1217:
1218: sub handler {
1219: #my $t0 = [&gettimeofday()];
1220: my $request=$_[0];
1221: $Apache::lonxml::request=$request;
1222: $Apache::lonxml::debug=$env{'user.debug'};
1223: $env{'request.uri'}=$request->uri;
1224: &setuppermissions();
1225:
1226: my $file=&Apache::lonnet::filelocation("",$request->uri);
1227:
1228: #check if we know where we are
1229: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1230: # if we are browsing we might not be able to know where we are
1231: if ($Apache::lonhomework::browse ne 'F' &&
1232: $env{'request.state'} ne "construct") {
1233: #should know where we are, so ask
1234: &unset_permissions();
1235: $request->internal_redirect('/adm/ambiguous');
1236: return OK;
1237: }
1238: }
1239: if (&setupheader($request)) {
1240: &unset_permissions();
1241: return OK;
1242: }
1243: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1244: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1245: my ($symb) = &Apache::lonnet::whichuser();
1246: &Apache::lonxml::debug('symb is '.$symb);
1247: if ($env{'request.state'} eq "construct") {
1248: if ( -e $file ) {
1249: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1250: ['problemmode']);
1251: if (!(defined $env{'form.problemmode'})) {
1252: #first visit to problem in construction space
1253: $env{'form.problemmode'}= 'view';
1254: &renderpage($request,$file);
1255: } elsif ($env{'form.problemmode'} eq 'editxml') {
1256: &editxmlmode($request,$file);
1257: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1258: &analyze($request,$file);
1259: } else {
1260: &update_construct_style();
1261: &renderpage($request,$file);
1262: }
1263: } else {
1264: # requested file doesn't exist in contruction space
1265: &newproblem($request);
1266: }
1267: } else {
1268: # just render the page normally outside of construction space
1269: &Apache::lonxml::debug("not construct");
1270: &renderpage($request,$file);
1271: }
1272: #my $td=&tv_interval($t0);
1273: #&Apache::lonxml::debug("Spent $td seconds processing");
1274: # always turn off debug messages
1275: $Apache::lonxml::debug=0;
1276: &unset_permissions();
1277: return OK;
1278:
1279: }
1280:
1281: 1;
1282: __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