1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.317.4.1 2010/08/13 01:33:48 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27:
28:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::drawimage();
51: use Apache::Constants qw(:common);
52: use Apache::loncommon();
53: use Apache::lonlocal;
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use HTML::Entities();
56: use File::Copy();
57:
58: # FIXME - improve commenting
59:
60:
61: BEGIN {
62: &Apache::lonxml::register_insert();
63: }
64:
65:
66: =pod
67:
68: =item set_bubble_lines()
69:
70: Called at analysis time to set the bubble lines
71: hash for the problem.. This should be called in the
72: end_problemtype tag in analysis mode.
73:
74: We fetch the hash of part id counters from lonxml
75: and push them into analyze:{part_id.bubble_lines}.
76:
77: =cut
78:
79: sub set_bubble_lines {
80: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
81:
82: foreach my $key (keys(%bubble_counters)) {
83: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
84: $bubble_counters{"$key"};
85: }
86: }
87:
88: #
89: # Decides what targets to render for.
90: # Implicit inputs:
91: # Various session environment variables:
92: # request.state - published - is a /res/ resource
93: # uploaded - is a /uploaded/ resource
94: # contruct - is a /priv/ resource
95: # form.grade_target - a form parameter requesting a specific target
96: sub get_target {
97: &Apache::lonxml::debug("request.state = $env{'request.state'}");
98: if( defined($env{'form.grade_target'})) {
99: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
100: } else {
101: &Apache::lonxml::debug("form.grade_target <undefined>");
102: }
103: if (($env{'request.state'} eq "published") ||
104: ($env{'request.state'} eq "uploaded")) {
105: if ( defined($env{'form.grade_target'} )
106: && ($env{'form.grade_target'} eq 'tex')) {
107: return ($env{'form.grade_target'});
108: } elsif ( defined($env{'form.grade_target'} )
109: && ($Apache::lonhomework::viewgrades eq 'F' )) {
110: return ($env{'form.grade_target'});
111: } elsif ( $env{'form.grade_target'} eq 'webgrade'
112: && ($Apache::lonhomework::queuegrade eq 'F' )) {
113: return ($env{'form.grade_target'});
114: } elsif ($env{'form.grade_target'} eq 'answer') {
115: if ($env{'form.answer_output_mode'} eq 'tex') {
116: return ($env{'form.grade_target'});
117: }
118: }
119: if ($env{'form.webgrade'} &&
120: ($Apache::lonhomework::modifygrades eq 'F'
121: || $Apache::lonhomework::queuegrade eq 'F' )) {
122: return ('grade','webgrade');
123: }
124: if ( defined($env{'form.submitted'}) &&
125: ( !defined($env{'form.newrandomization'}))) {
126: return ('grade', 'web');
127: } else {
128: return ('web');
129: }
130: } elsif ($env{'request.state'} eq "construct") {
131: if ( defined($env{'form.grade_target'}) ) {
132: return ($env{'form.grade_target'});
133: }
134: if ( defined($env{'form.preview'})) {
135: if ( defined($env{'form.submitted'})) {
136: return ('grade', 'web');
137: } else {
138: return ('web');
139: }
140: } else {
141: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
142: #$env{'form.webgrade'} = 'yes';
143: return ('grade','webgrade','answer');
144: } elsif (($env{'form.problemmode'} eq 'view') ||
145: ($env{'form.problemmode'} eq 'discard')) {
146: if ( defined($env{'form.submitted'}) &&
147: (!defined($env{'form.resetdata'})) &&
148: (!defined($env{'form.newrandomization'}))) {
149: return ('grade', 'web','answer');
150: } else {
151: return ('web','answer');
152: }
153: } elsif ($env{'form.problemmode'} eq 'edit') {
154: if ( $env{'form.submitted'} eq 'edit' ) {
155: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
156: return ('modified','web','answer');
157: } else {
158: return ('modified','no_output_web','edit');
159: }
160: } else {
161: return ('no_output_web','edit');
162: }
163: } else {
164: return ('web');
165: }
166: }
167: }
168: return ();
169: }
170:
171: sub setup_vars {
172: my ($target) = @_;
173: return ';'
174: # return ';$external::target='.$target.';';
175: }
176:
177: sub createmenu {
178: my ($which,$request)=@_;
179: if ($which eq 'grade') {
180: $request->print('<script type="text/javascript" language="JavaScript">
181: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
182: "height=350,width=150,menubar=no");
183: </script>');
184: }
185: }
186:
187: sub proctor_checked_in {
188: my ($slot_name,$slot,$type)=@_;
189: my @possible_proctors=split(",",$slot->{'proctor'});
190:
191: return 1 if (!@possible_proctors);
192:
193: my $key;
194: if ($type eq 'Task') {
195: my $version=$Apache::lonhomework::history{'resource.0.version'};
196: $key ="resource.$version.0.checkedin";
197: } elsif ($type eq 'problem') {
198: $key ='resource.0.checkedin';
199: }
200: # backward compatability, used to be username@domain,
201: # now is username:domain
202: my $who = $Apache::lonhomework::history{$key};
203: if ($who !~ /:/) {
204: $who =~ tr/@/:/;
205: }
206: foreach my $possible (@possible_proctors) {
207: if ($who eq $possible
208: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
209: return 1;
210: }
211: }
212:
213: return 0;
214: }
215:
216: sub check_slot_access {
217: my ($id,$type)=@_;
218:
219: # does it pass normal muster
220: my ($status,$datemsg)=&check_access($id);
221:
222: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
223: if ($useslots ne 'resource' && $useslots ne 'map'
224: && $useslots ne 'map_map') {
225: return ($status,$datemsg);
226: }
227:
228: if ($status eq 'SHOW_ANSWER' ||
229: $status eq 'CLOSED' ||
230: $status eq 'INVALID_ACCESS' ||
231: $status eq 'UNAVAILABLE') {
232: return ($status,$datemsg);
233: }
234: if ($env{'request.state'} eq "construct") {
235: return ($status,$datemsg);
236: }
237:
238: if ($type eq 'Task') {
239: my $version=$Apache::lonhomework::history{'resource.version'};
240: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
241: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
242: return ('SHOW_ANSWER');
243: }
244: }
245:
246: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
247: my $available = &Apache::lonnet::EXT("resource.0.available");
248: my @slots= (split(':',$availablestudent),split(':',$available));
249:
250: # if (!@slots) {
251: # return ($status,$datemsg);
252: # }
253: my $slotstatus='NOT_IN_A_SLOT';
254: my ($returned_slot,$slot_name);
255: foreach my $slot (@slots) {
256: $slot =~ s/(^\s*|\s*$)//g;
257: &Apache::lonxml::debug("getting $slot");
258: my %slot=&Apache::lonnet::get_slot($slot);
259: &Apache::lonhomework::showhash(%slot);
260: if ($slot{'starttime'} < time &&
261: $slot{'endtime'} > time &&
262: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
263: &Apache::lonxml::debug("$slot is good");
264: $slotstatus='NEEDS_CHECKIN';
265: $returned_slot=\%slot;
266: $slot_name=$slot;
267: last;
268: }
269: }
270: if ($slotstatus eq 'NEEDS_CHECKIN' &&
271: &proctor_checked_in($slot_name,$returned_slot,$type)) {
272: &Apache::lonxml::debug("protoctor checked in");
273: $slotstatus='CAN_ANSWER';
274: }
275:
276: my ($is_correct,$got_grade,$checkedin);
277: if ($type eq 'Task') {
278: my $version=$Apache::lonhomework::history{'resource.0.version'};
279: $got_grade =
280: ($Apache::lonhomework::history{"resource.$version.0.status"}
281: =~ /^(?:pass|fail)$/);
282: $is_correct =
283: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
284: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
285: $checkedin =
286: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
287: } elsif ($type eq 'problem') {
288: $got_grade = 1;
289: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
290: $is_correct =
291: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
292: }
293:
294: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
295:
296: # no slot is currently open, and has been checked in for this version
297: # but hasn't got a grade, therefore must be awaiting a grade
298: if (!defined($slot_name)
299: && $checkedin
300: && !$got_grade) {
301: return ('WAITING_FOR_GRADE');
302: }
303:
304: # Previously used slot is no longer open, and has been checked in for this version.
305: # However, the problem is not closed, and potentially, another slot might be
306: # used to gain access to it to work on it, until the due date is reached, and the
307: # problem then becomes CLOSED. Therefore return the slotstatus -
308: # (which will be NOT_IN_SLOT).
309: if (!defined($slot_name)
310: && $checkedin
311: && $type eq 'problem') {
312: return ($slotstatus);
313: }
314:
315: if ($slotstatus eq 'NOT_IN_A_SLOT'
316: && $checkedin ) {
317:
318: if ($got_grade) {
319: return ('SHOW_ANSWER');
320: } else {
321: return ('WAITING_FOR_GRADE');
322: }
323:
324: }
325:
326: if ( $is_correct) {
327: if ($type eq 'problem') {
328: return ($status);
329: }
330: return ('SHOW_ANSWER');
331: }
332:
333: if ( $status eq 'CANNOT_ANSWER' &&
334: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
335: return ($status,$datemsg);
336: }
337:
338: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
339: }
340:
341: # JB, 9/24/2002: Any changes in this function may require a change
342: # in lonnavmaps::resource::getDateStatus.
343: sub check_access {
344: my ($id) = @_;
345: my $date ='';
346: my $status;
347: my $datemsg = '';
348: my $lastdate = '';
349: my $type;
350: my $passed;
351:
352: if ($env{'request.state'} eq "construct") {
353: if ($env{'form.problemstate'}) {
354: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
355: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
356: && &hide_problem_status())) {
357: return ('CANNOT_ANSWER',
358: &mt('is in this state due to author settings.'));
359: }
360: } else {
361: return ($env{'form.problemstate'},
362: &mt('is in this state due to author settings.'));
363: }
364: }
365: &Apache::lonxml::debug("in construction ignoring dates");
366: $status='CAN_ANSWER';
367: $datemsg=&mt('is in under construction');
368: # return ($status,$datemsg);
369: }
370:
371: &Apache::lonxml::debug("checking for part :$id:");
372: &Apache::lonxml::debug("time:".time);
373:
374: my ($symb)=&Apache::lonnet::whichuser();
375: &Apache::lonxml::debug("symb:".$symb);
376: #if ($env{'request.state'} ne "construct" && $symb ne '') {
377: if ($env{'request.state'} ne "construct") {
378: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
379: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
380: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
381: $status='INVALID_ACCESS';
382: $date=&mt("can not be accessed from your location.");
383: return($status,$date);
384: }
385:
386: foreach my $temp ("opendate","duedate","answerdate") {
387: $lastdate = $date;
388: if ($temp eq 'duedate') {
389: $date = &due_date($id);
390: } else {
391: $date = &Apache::lonnet::EXT("resource.$id.$temp");
392: }
393:
394: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
395: if ($thistype =~ /^(con_lost|no_such_host)/ ||
396: $date =~ /^(con_lost|no_such_host)/) {
397: $status='UNAVAILABLE';
398: $date=&mt("may open later.");
399: return($status,$date);
400: }
401: if ($thistype eq 'date_interval') {
402: if ($temp eq 'opendate') {
403: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
404: }
405: if ($temp eq 'answerdate') {
406: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
407: }
408: }
409: &Apache::lonxml::debug("found :$date: for :$temp:");
410: if ($date eq '') {
411: $date = &mt("an unknown date"); $passed = 0;
412: } elsif ($date eq 'con_lost') {
413: $date = &mt("an indeterminate date"); $passed = 0;
414: } else {
415: if (time < $date) { $passed = 0; } else { $passed = 1; }
416: $date = &Apache::lonlocal::locallocaltime($date);
417: }
418: if (!$passed) { $type=$temp; last; }
419: }
420: &Apache::lonxml::debug("have :$type:$passed:");
421: if ($passed) {
422: $status='SHOW_ANSWER';
423: $datemsg=$date;
424: } elsif ($type eq 'opendate') {
425: $status='CLOSED';
426: $datemsg = &mt("will open on")." $date";
427: } elsif ($type eq 'duedate') {
428: $status='CAN_ANSWER';
429: $datemsg = &mt("is due at")." $date";
430: } elsif ($type eq 'answerdate') {
431: $status='CLOSED';
432: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
433: }
434: }
435: if ($status eq 'CAN_ANSWER' ||
436: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
437: #check #tries, and if correct.
438: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
439: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
440: if ( $tries eq '' ) { $tries = '0'; }
441: if ( $maxtries eq '' &&
442: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
443: if ($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.solved"}=~/^excused/) {
450: $status = 'CANNOT_ANSWER';
451: }
452: if ($status eq 'CANNOT_ANSWER'
453: && &show_answer_problem_status()) {
454: $status = 'SHOW_ANSWER';
455: }
456: }
457: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
458: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
459: &Apache::lonxml::debug("looking for interval @interval");
460: if ($interval[0]) {
461: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
462: &Apache::lonxml::debug("looking for accesstime $first_access");
463: if (!$first_access) {
464: $status='NOT_YET_VIEWED';
465: my $due_date = &due_date($id);
466: my $seconds_left = $due_date - time;
467: if ($seconds_left > $interval[0] || $due_date eq '') {
468: $seconds_left = $interval[0];
469: }
470: $datemsg=&seconds_to_human_length($seconds_left);
471: }
472: }
473: }
474:
475: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
476: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
477: # return ('UNCHECKEDOUT','needs to be checked out');
478: #}
479:
480:
481: &Apache::lonxml::debug("sending back :$status:$datemsg:");
482: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
483: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
484: $status='CAN_ANSWER';
485: $datemsg=&mt('is closed but you are allowed to view it');
486: }
487:
488: return ($status,$datemsg);
489: }
490: # this should work exactly like the copy in lonnavmaps.pm
491: sub due_date {
492: my ($part_id,$symb,$udom,$uname)=@_;
493: my $date;
494: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
495: $udom,$uname);
496: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
497: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
498: $udom,$uname);
499: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
500: if ($interval[0] =~ /\d+/) {
501: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
502: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
503: if (defined($first_access)) {
504: my $interval = $first_access+$interval[0];
505: $date = (!$due_date || $interval < $due_date) ? $interval
506: : $due_date;
507: } else {
508: $date = $due_date;
509: }
510: } else {
511: $date = $due_date;
512: }
513: return $date
514: }
515:
516: sub seconds_to_human_length {
517: my ($length)=@_;
518:
519: my $seconds=$length%60; $length=int($length/60);
520: my $minutes=$length%60; $length=int($length/60);
521: my $hours=$length%24; $length=int($length/24);
522: my $days=$length;
523:
524: my $timestr;
525: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
526: if ($hours > 0) { $timestr.=($timestr?", ":"").
527: &mt('[quant,_1,hour]',$hours); }
528: if ($minutes > 0) { $timestr.=($timestr?", ":"").
529: &mt('[quant,_1,minute]',$minutes); }
530: if ($seconds > 0) { $timestr.=($timestr?", ":"").
531: &mt('[quant,_1,second]',$seconds); }
532: return $timestr;
533: }
534:
535: sub showhash {
536: my (%hash) = @_;
537: &showhashsubset(\%hash,'.');
538: return '';
539: }
540:
541: sub showarray {
542: my ($array)=@_;
543: my $string="(";
544: foreach my $elm (@{ $array }) {
545: if (ref($elm) eq 'ARRAY') {
546: $string.=&showarray($elm);
547: } elsif (ref($elm) eq 'HASH') {
548: $string.= "HASH --- \n<br />";
549: $string.= &showhashsubset($elm,'.');
550: } else {
551: $string.="$elm,"
552: }
553: }
554: chop($string);
555: $string.=")";
556: return $string;
557: }
558:
559: sub showhashsubset {
560: my ($hash,$keyre) = @_;
561: my $resultkey;
562: foreach $resultkey (sort keys %$hash) {
563: if ($resultkey !~ /$keyre/) { next; }
564: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
565: &Apache::lonxml::debug("$resultkey ---- ".
566: &showarray($$hash{$resultkey}));
567: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
568: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
569: &showhashsubset($$hash{$resultkey},'.');
570: } else {
571: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
572: }
573: }
574: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
575: return '';
576: }
577:
578: sub setuppermissions {
579: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
580: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
581: if (! $viewgrades &&
582: exists($env{'request.course.sec'}) &&
583: $env{'request.course.sec'} !~ /^\s*$/) {
584: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
585: '/'.$env{'request.course.sec'});
586: }
587: $Apache::lonhomework::viewgrades = $viewgrades;
588:
589: if ($Apache::lonhomework::browse eq 'F' &&
590: $env{'form.devalidatecourseresdata'} eq 'on') {
591: my (undef,$courseid) = &Apache::lonnet::whichuser();
592: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
593: $env{"course.$courseid.domain"});
594: }
595:
596: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
597: if (! $modifygrades &&
598: exists($env{'request.course.sec'}) &&
599: $env{'request.course.sec'} !~ /^\s*$/) {
600: $modifygrades =
601: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
602: '/'.$env{'request.course.sec'});
603: }
604: $Apache::lonhomework::modifygrades = $modifygrades;
605:
606: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
607: if (! $queuegrade &&
608: exists($env{'request.course.sec'}) &&
609: $env{'request.course.sec'} !~ /^\s*$/) {
610: $queuegrade =
611: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
612: '/'.$env{'request.course.sec'});
613: }
614: $Apache::lonhomework::queuegrade = $queuegrade;
615: return '';
616: }
617:
618: sub unset_permissions {
619: undef($Apache::lonhomework::queuegrade);
620: undef($Apache::lonhomework::modifygrades);
621: undef($Apache::lonhomework::viewgrades);
622: undef($Apache::lonhomework::browse);
623: }
624:
625: sub setupheader {
626: my $request=$_[0];
627: &Apache::loncommon::content_type($request,'text/html');
628: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
629: &Apache::loncommon::no_cache($request);
630: }
631: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
632: # 'lastrevisiondate'));
633: $request->send_http_header;
634: return OK if $request->header_only;
635: return ''
636: }
637:
638: sub handle_save_or_undo {
639: my ($request,$problem,$result) = @_;
640: my $file = &Apache::lonnet::filelocation("",$request->uri);
641: my $filebak =$file.".bak";
642: my $filetmp =$file.".tmp";
643: my $error=0;
644: if ($env{'form.Undo'} eq &mt('undo')) {
645: my $error=0;
646: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
647: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
648: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
649: if (!$error) {
650: &Apache::lonxml::info("<p><b>".
651: &mt("Undid changes, Switched [_1] and [_2]",
652: '<span class="LC_filename">'.$filebak.
653: '</span>',
654: '<span class="LC_filename">'.$file.
655: '</span>')."</b></p>");
656: } else {
657: &Apache::lonxml::info("<p><span class=\"LC_error\">".
658: &mt("Unable to undo, unable to switch [_1] and [_2]",
659: '<span class="LC_filename">'.
660: $filebak.'</span>',
661: '<span class="LC_filename">'.
662: $file.'</span>')."</span></p>");
663: $error=1;
664: }
665: } else {
666: &Apache::lonnet::correct_line_ends($result);
667: my $fs=Apache::File->new(">$filebak");
668: if (defined($fs)) {
669: print $fs $$problem;
670: } else {
671: &Apache::lonxml::info("<span class=\"LC_error\">".
672: &mt("Unable to make backup [_1]",
673: '<span class="LC_filename">'.
674: $filebak.'</span>')."</span>");
675: $error=2;
676: }
677: my $fh=Apache::File->new(">$file");
678: if (defined($fh)) {
679: print $fh $$result;
680: } else {
681: &Apache::lonxml::info('<span class="LC_error">'.
682: &mt("Unable to write to [_1]",
683: '<span class="LC_filename">'.
684: $file.'</span>').
685: '</span>');
686: $error|=4;
687: }
688: }
689: return $error;
690: }
691:
692: sub analyze_header {
693: my ($request) = @_;
694: my $js = &Apache::structuretags::setmode_javascript();
695:
696: # Breadcrumbs
697: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
698: 'text' => 'Construction Space'},
699: {'href' => '',
700: 'text' => 'Problem Testing'},
701: {'href' => '',
702: 'text' => 'Analyzing a problem'}];
703:
704: my $result =
705: &Apache::loncommon::start_page('Analyzing a problem',
706: $js,
707: {'bread_crumbs' => $brcrum,})
708: .&Apache::loncommon::head_subbox(
709: &Apache::loncommon::CSTR_pageheader());
710: $result .=
711: &Apache::lonxml::message_location().'
712: <form name="lonhomework" method="post" action="'.
713: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
714: '<input type="hidden" name="problemmode" value="'.
715: $env{'form.problemmode'}.'" />'.
716: &Apache::structuretags::remember_problem_state().'
717: <div class="LC_edit_problem_analyze_header">
718: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
719: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
720: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
721: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
722: <hr />
723: <input type="button" name="submitmode" value="'.&mt("View").'" '.
724: 'onclick="javascript:setmode(this.form,'."'view'".')" />
725: <hr />
726: </div>
727: </form>';
728: &Apache::lonxml::add_messages(\$result);
729: $request->print($result);
730: $request->rflush();
731: }
732:
733: sub analyze_footer {
734: my ($request) = @_;
735: $request->print(&Apache::loncommon::end_page());
736: $request->rflush();
737: }
738:
739: sub analyze {
740: my ($request,$file) = @_;
741: &Apache::lonxml::debug("Analyze");
742: my $result;
743: my %overall;
744: my %seedexample;
745: my %allparts;
746: my $rndseed=$env{'form.rndseed'};
747: &analyze_header($request);
748: my %prog_state=
749: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
750: &mt('Getting Problem Variants'),
751: $env{'form.numtoanalyze'},
752: 'inline',undef);
753: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
754: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
755: &mt('last problem'));
756: if (&Apache::loncommon::connection_aborted($request)) { return; }
757: my $thisseed=$i+$rndseed;
758: my $subresult=&Apache::lonnet::ssi($request->uri,
759: ('grade_target' => 'analyze'),
760: ('rndseed' => $thisseed));
761: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
762: my %analyze=&Apache::lonnet::str2hash($subresult);
763: my @parts;
764: if (defined(@{ $analyze{'parts'} })) {
765: @parts=@{ $analyze{'parts'} };
766: }
767: foreach my $part (@parts) {
768: if (!exists($allparts{$part})) {$allparts{$part}=1;};
769: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
770: $analyze{$part.'.type'} eq 'stringresponse' ||
771: $analyze{$part.'.type'} eq 'formularesponse' ) {
772: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
773: my $i=0;
774: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
775: push( @{ $overall{$part.'.answer'}[$i] },
776: $answer_part);
777: my $concatanswer= join("\0",@{ $answer_part });
778: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
779: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
780: }
781: $seedexample{join("\0",$part,$i,@{$answer_part})}=
782: $thisseed;
783: $i++;
784: }
785: }
786: if (!keys(%{ $analyze{$part.'.answer'} })) {
787: my $answer_part =
788: ['<span class="LC_error">'.&mt('Error').'</span>'];
789: $seedexample{join("\0",$part,0,@{$answer_part})}=
790: $thisseed;
791: push( @{ $overall{$part.'.answer'}[0] },
792: $answer_part);
793: }
794: }
795: }
796: }
797: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
798: &mt('Analyzing Results'));
799: $request->print('<hr />'
800: .'<h3>'
801: .&mt('List of possible answers')
802: .'</h3>'
803: );
804: foreach my $part (sort(keys(%allparts))) {
805: if (defined(@{ $overall{$part.'.answer'} })) {
806: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
807: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
808: $request->print(&Apache::loncommon::start_data_table()
809: .&Apache::loncommon::start_data_table_header_row()
810: .'<th colspan="'.($num_cols+1).'">'
811: .&mt('Part').' '.$part
812: );
813: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
814: $request->print(' '.&mt('Answer [_1]',$i+1));
815: }
816: $request->print('</th>'
817: .&Apache::loncommon::end_data_table_header_row()
818: );
819: my %frequency;
820: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
821: $frequency{join("\0",@{ $answer })}++;
822: }
823: $request->print(&Apache::loncommon::start_data_table_header_row()
824: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
825: .'<th>'.&mt('Frequency').'<br />'
826: .'('.&mt('click for example').')</th>'
827: .&Apache::loncommon::end_data_table_header_row()
828: );
829: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
830: $request->print(&Apache::loncommon::start_data_table_row()
831: .'<td>'
832: .join('</td><td>',split("\0",$answer))
833: .'</td>'
834: .'<td>'
835: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
836: .'</td>'
837: .&Apache::loncommon::end_data_table_row()
838: );
839: }
840: $request->print(&Apache::loncommon::end_data_table());
841: }
842: } else {
843: $request->print('<p class="LC_warning">'
844: .&mt('Response [_1] is not analyzable at this time.',$part)
845: .'</p>'
846: );
847: }
848: }
849: if (scalar(keys(%allparts)) == 0 ) {
850: $request->print('<p class="LC_warning">'
851: .&mt('Found no analyzable responses in this problem.'
852: .' Currently only Numerical, Formula and String response styles are supported.')
853: .'</p>'
854: );
855: }
856: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
857: &analyze_footer($request);
858: &Apache::lonhomework::showhash(%overall);
859: return $result;
860: }
861:
862: {
863: my $show_problem_status;
864: sub reset_show_problem_status {
865: undef($show_problem_status);
866: }
867:
868: sub set_show_problem_status {
869: my ($new_status) = @_;
870: $show_problem_status = lc($new_status);
871: }
872:
873: sub hide_problem_status {
874: return ($show_problem_status eq 'no'
875: || $show_problem_status eq 'no_feedback_ever');
876: }
877:
878: sub show_problem_status {
879: return ($show_problem_status eq 'yes'
880: || $show_problem_status eq 'answer'
881: || $show_problem_status eq '');
882: }
883:
884: sub show_some_problem_status {
885: return ($show_problem_status eq 'no');
886: }
887:
888: sub show_no_problem_status {
889: return ($show_problem_status eq 'no_feedback_ever');
890: }
891:
892: sub show_answer_problem_status {
893: return ($show_problem_status eq 'answer');
894: }
895: }
896:
897: sub editxmlmode {
898: my ($request,$file) = @_;
899: my $result;
900: my $problem=&Apache::lonnet::getfile($file);
901: if ($problem eq -1) {
902: &Apache::lonxml::error(
903: '<b> '
904: .&mt('Unable to find [_1]',
905: '<span class="LC_filename">'.$file.'</span>')
906: .'</b>');
907:
908: $problem='';
909: }
910: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
911: my $error=&handle_save_or_undo($request,\$problem,
912: \$env{'form.editxmltext'});
913: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
914: }
915: &Apache::lonhomework::showhashsubset(\%env,'^form');
916: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
917: &Apache::lonhomework::showhashsubset(\%env,'^form');
918: $env{'form.problemmode'}='view';
919: &renderpage($request,$file);
920: } else {
921: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
922: if ($cols > 80) { $cols = 80; }
923: if ($cols < 70) { $cols = 70; }
924: if ($rows < 20) { $rows = 20; }
925: my $js =
926: &Apache::edit::js_change_detection().
927: &Apache::loncommon::resize_textarea_js().
928: &Apache::structuretags::setmode_javascript().
929: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
930: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
931: my $dragmath_button =
932: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
933:
934: # Breadcrumbs
935: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
936: 'text' => 'Construction Space'},
937: {'href' => '',
938: 'text' => 'Problem Editing'}];
939:
940: my $start_page =
941: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
942: {'no_auto_mt_title' => 1,
943: 'only_body' => $only_body,
944: 'add_entries' => {
945: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
946: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
947: },
948: 'bread_crumbs' => $brcrum,
949: });
950:
951: $result=$start_page
952: .&Apache::loncommon::head_subbox(
953: &Apache::loncommon::CSTR_pageheader());
954: $result.=&renderpage($request,$file,['no_output_web'],1).
955: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
956: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
957: &Apache::structuretags::remember_problem_state().'
958: <div class="LC_edit_problem_editxml_header">
959: <table class="LC_edit_problem_header_title"><tr><td>
960: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
961: </td><td align="right">
962: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
963: </td></tr>
964: </table>
965: <div class="LC_edit_problem_discards">
966: <input type="hidden" name="problemmode" value="editxml" />
967:
968: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
969: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
970: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
971: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
972: '.$dragmath_button.'
973: </div>
974: <div class="LC_edit_problem_saves">
975: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
976: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
977: </div>
978: <hr style="clear:both;" />
979: '.&Apache::lonxml::message_location().'
980: </div>
981: ' . '
982: <textarea '.&Apache::edit::element_change_detection().
983: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
984: ' name="editxmltext" id="LC_editxmltext">'.
985: &HTML::Entities::encode($problem,'<>&"').'</textarea>
986: <div id="LC_aftertextarea">
987: </div>
988: </form>'.&Apache::loncommon::end_page();
989: &Apache::lonxml::add_messages(\$result);
990: $request->print($result);
991: }
992: return '';
993: }
994:
995: #
996: # Render the page in whatever target desired.
997: #
998: sub renderpage {
999: my ($request,$file,$targets,$return_string) = @_;
1000:
1001: my @targets = @{$targets || [&get_target()]};
1002: &Apache::lonhomework::showhashsubset(\%env,'form.');
1003: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1004:
1005: my $overall_result;
1006: foreach my $target (@targets) {
1007: # FIXME need to do something intelligent when a problem goes
1008: # from viewable to not viewable due to map conditions
1009: #&setuppermissions();
1010: #if ( $Apache::lonhomework::browse ne '2'
1011: # && $Apache::lonhomework::browse ne 'F' ) {
1012: # $request->print(" You most likely shouldn't see me.");
1013: #}
1014: #my $t0 = [&gettimeofday()];
1015: my $output=1;
1016: if ($target eq 'no_output_web') {
1017: $target = 'web'; $output=0;
1018: }
1019: my $problem=&Apache::lonnet::getfile($file);
1020: my $result;
1021: if ($problem eq -1) {
1022: $problem='';
1023: my $filename=(split('/',$file))[-1];
1024: my $error =
1025: "<b> ".&mt('Unable to find [_1]',
1026: '<span class="LC_filename">'.$filename.'</span>')
1027: ."</b>";
1028: $result.=
1029: &Apache::loncommon::simple_error_page($request,'Not available',
1030: $error);
1031: return;
1032: }
1033:
1034: my %mystyle;
1035: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1036: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1037: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1038:
1039: &Apache::lonxml::debug("Should be parsing now");
1040: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1041: &setup_vars($target),%mystyle);
1042: &finished_parsing();
1043: if (!$output) { $result = ''; }
1044: #$request->print("Result follows:");
1045: if ($target eq 'modified') {
1046: &handle_save_or_undo($request,\$problem,\$result);
1047: } else {
1048: if ($target eq 'analyze') {
1049: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1050: undef(%Apache::lonhomework::analyze);
1051: }
1052: #my $td=&tv_interval($t0);
1053: #if ( $Apache::lonxml::debug) {
1054: #$result =~ s:</body>::;
1055: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1056: #}
1057: # $request->print($result);
1058: $overall_result.=$result;
1059: # $request->rflush();
1060: }
1061: #$request->print(":Result ends");
1062: #my $td=&tv_interval($t0);
1063: }
1064: if (!$return_string) {
1065: &Apache::lonxml::add_messages(\$overall_result);
1066: $request->print($overall_result);
1067: $request->rflush();
1068: } else {
1069: return $overall_result;
1070: }
1071: }
1072:
1073: sub finished_parsing {
1074: undef($Apache::lonhomework::parsing_a_problem);
1075: undef($Apache::lonhomework::parsing_a_task);
1076: }
1077:
1078: sub get_template_list {
1079: my ($extension) = @_;
1080: my $result;
1081: my @allnames;
1082: &Apache::lonxml::debug("Looking for :$extension:");
1083: my $glob_extension = $extension;
1084: if ($extension eq 'survey' || $extension eq 'exam') {
1085: $glob_extension = 'problem';
1086: }
1087: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1088: '/templates/*.'.$glob_extension);
1089: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1090: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1091: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1092: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1093: my ($midpoint,$seconddiv,$numfiles);
1094: $numfiles = 0;
1095: foreach my $file (@files) {
1096: next if ($file->[1] !~ /\S/);
1097: $numfiles ++;
1098: }
1099: if ($numfiles > 0) {
1100: $result = '<div class="LC_left_float">';
1101: $midpoint = int($numfiles/2);
1102: if ($numfiles%2) {
1103: $midpoint ++;
1104: }
1105: }
1106: my $count = 0;
1107: my $currentcategory='';
1108: my $first = 1;
1109: foreach my $file (@files) {
1110: next if ($file->[1] !~ /\S/);
1111: if ($file->[2] ne $currentcategory) {
1112: $currentcategory=$file->[2];
1113: if ((!$seconddiv) && ($count >= $midpoint)) {
1114: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1115: $seconddiv = 1;
1116: } elsif (!$first) {
1117: $result.='</div>'."\n";
1118: } else {
1119: $first = 0;
1120: }
1121: $result.= '<div class="LC_Box">'."\n"
1122: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1123: $count++;
1124: }
1125: $result .=
1126: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1127: $file->[1].'</label>';
1128: if ($file->[3]) {
1129: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1130: }
1131: my $filename=$file->[0];
1132: $filename=~s/^\/home\/httpd\/html//;
1133: $result.=' <span class="LC_fontsize_small">'
1134: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1135: .'</span><br />'."\n";
1136: $count ++;
1137: }
1138: if ($numfiles > 0) {
1139: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1140: }
1141: return $result;
1142: }
1143:
1144: sub newproblem {
1145: my ($request) = @_;
1146:
1147: if ($env{'form.template'}) {
1148: my $file = $env{'form.template'};
1149: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1150: &File::Copy::copy($file,$dest);
1151: &renderpage($request,$dest);
1152: return;
1153: }
1154:
1155: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1156: &Apache::lonxml::debug("Looking for :$extension:");
1157: my $templatelist=&get_template_list($extension);
1158: if ($env{'form.newfile'} && !$templatelist) {
1159: # no templates found
1160: my $templatefilename =
1161: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1162: &Apache::lonxml::debug("$templatefilename");
1163: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1164: &File::Copy::copy($templatefilename,$dest);
1165: &renderpage($request,$dest);
1166: } else {
1167: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1168: my $shownurl=$url;
1169: $shownurl=~s-^/~-/priv/-;
1170: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1171: my $errormsg;
1172: my $instructions;
1173: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1174: 'text' => 'Construction Space'},
1175: {'href' => '',
1176: 'text' => "Create New $extension"}];
1177: my $start_page =
1178: &Apache::loncommon::start_page("Create New $extension",
1179: undef,
1180: {'bread_crumbs' => $brcrum,});
1181: $request->print(
1182: $start_page
1183: .&Apache::loncommon::head_subbox(
1184: &Apache::loncommon::CSTR_pageheader())
1185: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1186: $errormsg
1187: ".&mt("The requested file [_1] currently does not exist.",
1188: '<span class="LC_filename">'.$shownurl.'</span>').'
1189: <p class="LC_info">
1190: '.&mt("To create a new $extension, select a template from the".
1191: " list below. Then click on the \"Create $extension\" button.").'
1192: </p><div><form action="'.$url.'" method="post">');
1193:
1194: if (defined($templatelist)) {
1195: $request->print($templatelist);
1196: }
1197: $request->print('<br /><input type="submit" name="newfile" value="'.
1198: &mt("Create $extension").'" />');
1199: $request->print('</form></div>'.&Apache::loncommon::end_page());
1200: }
1201: return;
1202: }
1203:
1204: sub update_construct_style {
1205: if ($env{'request.state'} eq "construct"
1206: && $env{'form.problemmode'} eq 'view'
1207: && defined($env{'form.submitted'})
1208: && !defined($env{'form.resetdata'})
1209: && !defined($env{'form.newrandomization'})) {
1210: if ((!$env{'form.style_file'} && $env{'construct.style'})
1211: ||$env{'form.clear_style_file'}) {
1212: &Apache::lonnet::delenv('construct.style');
1213: } elsif ($env{'form.style_file'}
1214: && $env{'construct.style'} ne $env{'form.style_file'}) {
1215: &Apache::lonnet::appenv({'construct.style' =>
1216: $env{'form.style_file'}});
1217: }
1218: }
1219: }
1220:
1221:
1222: sub handler {
1223: #my $t0 = [&gettimeofday()];
1224: my $request=$_[0];
1225: $Apache::lonxml::request=$request;
1226: $Apache::lonxml::debug=$env{'user.debug'};
1227: $env{'request.uri'}=$request->uri;
1228: &setuppermissions();
1229:
1230: my $file=&Apache::lonnet::filelocation("",$request->uri);
1231:
1232: #check if we know where we are
1233: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1234: # if we are browsing we might not be able to know where we are
1235: if ($Apache::lonhomework::browse ne 'F' &&
1236: $env{'request.state'} ne "construct") {
1237: #should know where we are, so ask
1238: &unset_permissions();
1239: $request->internal_redirect('/adm/ambiguous');
1240: return OK;
1241: }
1242: }
1243: if (&setupheader($request)) {
1244: &unset_permissions();
1245: return OK;
1246: }
1247: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1248: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1249: my ($symb) = &Apache::lonnet::whichuser();
1250: &Apache::lonxml::debug('symb is '.$symb);
1251: if ($env{'request.state'} eq "construct") {
1252: if ( -e $file ) {
1253: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1254: ['problemmode']);
1255: if (!(defined $env{'form.problemmode'})) {
1256: #first visit to problem in construction space
1257: $env{'form.problemmode'}= 'view';
1258: &renderpage($request,$file);
1259: } elsif ($env{'form.problemmode'} eq 'editxml') {
1260: &editxmlmode($request,$file);
1261: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1262: &analyze($request,$file);
1263: } else {
1264: &update_construct_style();
1265: &renderpage($request,$file);
1266: }
1267: } else {
1268: # requested file doesn't exist in contruction space
1269: &newproblem($request);
1270: }
1271: } else {
1272: # just render the page normally outside of construction space
1273: &Apache::lonxml::debug("not construct");
1274: &renderpage($request,$file);
1275: }
1276: #my $td=&tv_interval($t0);
1277: #&Apache::lonxml::debug("Spent $td seconds processing");
1278: # always turn off debug messages
1279: $Apache::lonxml::debug=0;
1280: &unset_permissions();
1281: return OK;
1282:
1283: }
1284:
1285: 1;
1286: __END__
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