1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.317.4.3 2011/01/06 22:38:11 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: if ( defined($env{'form.grade_target'}) ) {
133: return ($env{'form.grade_target'});
134: }
135: if ( defined($env{'form.preview'})) {
136: if ( defined($env{'form.submitted'})) {
137: return ('grade', 'web');
138: } else {
139: return ('web');
140: }
141: } else {
142: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
143: #$env{'form.webgrade'} = 'yes';
144: return ('grade','webgrade','answer');
145: } elsif (($env{'form.problemmode'} eq 'view') ||
146: ($env{'form.problemmode'} eq 'discard')) {
147: if ( defined($env{'form.submitted'}) &&
148: (!defined($env{'form.resetdata'})) &&
149: (!defined($env{'form.newrandomization'}))) {
150: return ('grade', 'web','answer');
151: } else {
152: return ('web','answer');
153: }
154: } elsif ($env{'form.problemmode'} eq 'edit') {
155: if ( $env{'form.submitted'} eq 'edit' ) {
156: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
157: return ('modified','web','answer');
158: } else {
159: return ('modified','no_output_web','edit');
160: }
161: } else {
162: return ('no_output_web','edit');
163: }
164: } else {
165: return ('web');
166: }
167: }
168: }
169: return ();
170: }
171:
172: sub setup_vars {
173: my ($target) = @_;
174: return ';'
175: # return ';$external::target='.$target.';';
176: }
177:
178: sub createmenu {
179: my ($which,$request)=@_;
180: if ($which eq 'grade') {
181: $request->print('<script type="text/javascript" language="JavaScript">
182: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
183: "height=350,width=150,menubar=no");
184: </script>');
185: }
186: }
187:
188: sub proctor_checked_in {
189: my ($slot_name,$slot,$type)=@_;
190: my @possible_proctors=split(",",$slot->{'proctor'});
191:
192: return 1 if (!@possible_proctors);
193:
194: my $key;
195: if ($type eq 'Task') {
196: my $version=$Apache::lonhomework::history{'resource.0.version'};
197: $key ="resource.$version.0.checkedin";
198: } elsif ($type eq 'problem') {
199: $key ='resource.0.checkedin';
200: }
201: # backward compatability, used to be username@domain,
202: # now is username:domain
203: my $who = $Apache::lonhomework::history{$key};
204: if ($who !~ /:/) {
205: $who =~ tr/@/:/;
206: }
207: foreach my $possible (@possible_proctors) {
208: if ($who eq $possible
209: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
210: return 1;
211: }
212: }
213:
214: return 0;
215: }
216:
217: sub check_slot_access {
218: my ($id,$type)=@_;
219:
220: # does it pass normal muster
221: my ($status,$datemsg)=&check_access($id);
222:
223: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
224: if ($useslots ne 'resource' && $useslots ne 'map'
225: && $useslots ne 'map_map') {
226: return ($status,$datemsg);
227: }
228:
229: if ($status eq 'SHOW_ANSWER' ||
230: $status eq 'CLOSED' ||
231: $status eq 'INVALID_ACCESS' ||
232: $status eq 'UNAVAILABLE') {
233: return ($status,$datemsg);
234: }
235: if ($env{'request.state'} eq "construct") {
236: return ($status,$datemsg);
237: }
238:
239: if ($type eq 'Task') {
240: my $version=$Apache::lonhomework::history{'resource.version'};
241: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
242: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
243: return ('SHOW_ANSWER');
244: }
245: }
246:
247: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
248: my $available = &Apache::lonnet::EXT("resource.0.available");
249: my @slots= (split(':',$availablestudent),split(':',$available));
250:
251: # if (!@slots) {
252: # return ($status,$datemsg);
253: # }
254: my $slotstatus='NOT_IN_A_SLOT';
255: my ($returned_slot,$slot_name);
256: foreach my $slot (@slots) {
257: $slot =~ s/(^\s*|\s*$)//g;
258: &Apache::lonxml::debug("getting $slot");
259: my %slot=&Apache::lonnet::get_slot($slot);
260: &Apache::lonhomework::showhash(%slot);
261: if ($slot{'starttime'} < time &&
262: $slot{'endtime'} > time &&
263: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
264: &Apache::lonxml::debug("$slot is good");
265: $slotstatus='NEEDS_CHECKIN';
266: $returned_slot=\%slot;
267: $slot_name=$slot;
268: last;
269: }
270: }
271: if ($slotstatus eq 'NEEDS_CHECKIN' &&
272: &proctor_checked_in($slot_name,$returned_slot,$type)) {
273: &Apache::lonxml::debug("proctor checked in");
274: $slotstatus=$status;
275: }
276:
277: my ($is_correct,$got_grade,$checkedin);
278: if ($type eq 'Task') {
279: my $version=$Apache::lonhomework::history{'resource.0.version'};
280: $got_grade =
281: ($Apache::lonhomework::history{"resource.$version.0.status"}
282: =~ /^(?:pass|fail)$/);
283: $is_correct =
284: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
285: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
286: $checkedin =
287: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
288: } elsif ($type eq 'problem') {
289: $got_grade = 1;
290: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
291: $is_correct =
292: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
293: }
294:
295: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
296:
297: # no slot is currently open, and has been checked in for this version
298: # but hasn't got a grade, therefore must be awaiting a grade
299: if (!defined($slot_name)
300: && $checkedin
301: && !$got_grade) {
302: return ('WAITING_FOR_GRADE');
303: }
304:
305: # Previously used slot is no longer open, and has been checked in for this version.
306: # However, the problem is not closed, and potentially, another slot might be
307: # used to gain access to it to work on it, until the due date is reached, and the
308: # problem then becomes CLOSED. Therefore return the slotstatus -
309: # (which will be NOT_IN_SLOT).
310: if (!defined($slot_name)
311: && $checkedin
312: && $type eq 'problem') {
313: return ($slotstatus);
314: }
315:
316: if ($slotstatus eq 'NOT_IN_A_SLOT'
317: && $checkedin ) {
318:
319: if ($got_grade) {
320: return ('SHOW_ANSWER');
321: } else {
322: return ('WAITING_FOR_GRADE');
323: }
324:
325: }
326:
327: if ( $is_correct) {
328: if ($type eq 'problem') {
329: return ($status);
330: }
331: return ('SHOW_ANSWER');
332: }
333:
334: if ( $status eq 'CANNOT_ANSWER' &&
335: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
336: return ($status,$datemsg);
337: }
338:
339: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
340: }
341:
342: # JB, 9/24/2002: Any changes in this function may require a change
343: # in lonnavmaps::resource::getDateStatus.
344: sub check_access {
345: my ($id) = @_;
346: my $date ='';
347: my $status;
348: my $datemsg = '';
349: my $lastdate = '';
350: my $type;
351: my $passed;
352:
353: if ($env{'request.state'} eq "construct") {
354: if ($env{'form.problemstate'}) {
355: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
356: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
357: && &hide_problem_status())) {
358: return ('CANNOT_ANSWER',
359: &mt('is in this state due to author settings.'));
360: }
361: } else {
362: return ($env{'form.problemstate'},
363: &mt('is in this state due to author settings.'));
364: }
365: }
366: &Apache::lonxml::debug("in construction ignoring dates");
367: $status='CAN_ANSWER';
368: $datemsg=&mt('is in under construction');
369: # return ($status,$datemsg);
370: }
371:
372: &Apache::lonxml::debug("checking for part :$id:");
373: &Apache::lonxml::debug("time:".time);
374:
375: my ($symb)=&Apache::lonnet::whichuser();
376: &Apache::lonxml::debug("symb:".$symb);
377: #if ($env{'request.state'} ne "construct" && $symb ne '') {
378: if ($env{'request.state'} ne "construct") {
379: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
380: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
381: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
382: $status='INVALID_ACCESS';
383: $date=&mt("can not be accessed from your location.");
384: return($status,$date);
385: }
386:
387: foreach my $temp ("opendate","duedate","answerdate") {
388: $lastdate = $date;
389: if ($temp eq 'duedate') {
390: $date = &due_date($id);
391: } else {
392: $date = &Apache::lonnet::EXT("resource.$id.$temp");
393: }
394:
395: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
396: if ($thistype =~ /^(con_lost|no_such_host)/ ||
397: $date =~ /^(con_lost|no_such_host)/) {
398: $status='UNAVAILABLE';
399: $date=&mt("may open later.");
400: return($status,$date);
401: }
402: if ($thistype eq 'date_interval') {
403: if ($temp eq 'opendate') {
404: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
405: }
406: if ($temp eq 'answerdate') {
407: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
408: }
409: }
410: &Apache::lonxml::debug("found :$date: for :$temp:");
411: if ($date eq '') {
412: $date = &mt("an unknown date"); $passed = 0;
413: } elsif ($date eq 'con_lost') {
414: $date = &mt("an indeterminate date"); $passed = 0;
415: } else {
416: if (time < $date) { $passed = 0; } else { $passed = 1; }
417: $date = &Apache::lonlocal::locallocaltime($date);
418: }
419: if (!$passed) { $type=$temp; last; }
420: }
421: &Apache::lonxml::debug("have :$type:$passed:");
422: if ($passed) {
423: $status='SHOW_ANSWER';
424: $datemsg=$date;
425: } elsif ($type eq 'opendate') {
426: $status='CLOSED';
427: $datemsg = &mt("will open on")." $date";
428: } elsif ($type eq 'duedate') {
429: $status='CAN_ANSWER';
430: $datemsg = &mt("is due at")." $date";
431: } elsif ($type eq 'answerdate') {
432: $status='CLOSED';
433: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
434: }
435: }
436: if ($status eq 'CAN_ANSWER' ||
437: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
438: #check #tries, and if correct.
439: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
440: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
441: if ( $tries eq '' ) { $tries = '0'; }
442: if ( $maxtries eq '' &&
443: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
444: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
445: # if (correct and show prob status) or excused then CANNOT_ANSWER
446: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
447: &&
448: &show_problem_status())
449: ||
450: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
451: $status = 'CANNOT_ANSWER';
452: }
453: if ($status eq 'CANNOT_ANSWER'
454: && &show_answer_problem_status()) {
455: $status = 'SHOW_ANSWER';
456: }
457: }
458: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
459: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
460: &Apache::lonxml::debug("looking for interval @interval");
461: if ($interval[0]) {
462: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
463: &Apache::lonxml::debug("looking for accesstime $first_access");
464: if (!$first_access) {
465: $status='NOT_YET_VIEWED';
466: my $due_date = &due_date($id);
467: my $seconds_left = $due_date - time;
468: if ($seconds_left > $interval[0] || $due_date eq '') {
469: $seconds_left = $interval[0];
470: }
471: $datemsg=&seconds_to_human_length($seconds_left);
472: }
473: }
474: }
475:
476: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
477: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
478: # return ('UNCHECKEDOUT','needs to be checked out');
479: #}
480:
481:
482: &Apache::lonxml::debug("sending back :$status:$datemsg:");
483: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
484: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
485: $status='CAN_ANSWER';
486: $datemsg=&mt('is closed but you are allowed to view it');
487: }
488:
489: return ($status,$datemsg);
490: }
491: # this should work exactly like the copy in lonnavmaps.pm
492: sub due_date {
493: my ($part_id,$symb,$udom,$uname)=@_;
494: my $date;
495: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
496: $udom,$uname);
497: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
498: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
499: $udom,$uname);
500: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
501: if ($interval[0] =~ /\d+/) {
502: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
503: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
504: if (defined($first_access)) {
505: my $interval = $first_access+$interval[0];
506: $date = (!$due_date || $interval < $due_date) ? $interval
507: : $due_date;
508: } else {
509: $date = $due_date;
510: }
511: } else {
512: $date = $due_date;
513: }
514: return $date
515: }
516:
517: sub seconds_to_human_length {
518: my ($length)=@_;
519:
520: my $seconds=$length%60; $length=int($length/60);
521: my $minutes=$length%60; $length=int($length/60);
522: my $hours=$length%24; $length=int($length/24);
523: my $days=$length;
524:
525: my $timestr;
526: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
527: if ($hours > 0) { $timestr.=($timestr?", ":"").
528: &mt('[quant,_1,hour]',$hours); }
529: if ($minutes > 0) { $timestr.=($timestr?", ":"").
530: &mt('[quant,_1,minute]',$minutes); }
531: if ($seconds > 0) { $timestr.=($timestr?", ":"").
532: &mt('[quant,_1,second]',$seconds); }
533: return $timestr;
534: }
535:
536: sub showhash {
537: my (%hash) = @_;
538: &showhashsubset(\%hash,'.');
539: return '';
540: }
541:
542: sub showarray {
543: my ($array)=@_;
544: my $string="(";
545: foreach my $elm (@{ $array }) {
546: if (ref($elm) eq 'ARRAY') {
547: $string.=&showarray($elm);
548: } elsif (ref($elm) eq 'HASH') {
549: $string.= "HASH --- \n<br />";
550: $string.= &showhashsubset($elm,'.');
551: } else {
552: $string.="$elm,"
553: }
554: }
555: chop($string);
556: $string.=")";
557: return $string;
558: }
559:
560: sub showhashsubset {
561: my ($hash,$keyre) = @_;
562: my $resultkey;
563: foreach $resultkey (sort keys %$hash) {
564: if ($resultkey !~ /$keyre/) { next; }
565: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
566: &Apache::lonxml::debug("$resultkey ---- ".
567: &showarray($$hash{$resultkey}));
568: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
569: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
570: &showhashsubset($$hash{$resultkey},'.');
571: } else {
572: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
573: }
574: }
575: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
576: return '';
577: }
578:
579: sub setuppermissions {
580: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
581: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
582: if (! $viewgrades &&
583: exists($env{'request.course.sec'}) &&
584: $env{'request.course.sec'} !~ /^\s*$/) {
585: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
586: '/'.$env{'request.course.sec'});
587: }
588: $Apache::lonhomework::viewgrades = $viewgrades;
589:
590: if ($Apache::lonhomework::browse eq 'F' &&
591: $env{'form.devalidatecourseresdata'} eq 'on') {
592: my (undef,$courseid) = &Apache::lonnet::whichuser();
593: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
594: $env{"course.$courseid.domain"});
595: }
596:
597: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
598: if (! $modifygrades &&
599: exists($env{'request.course.sec'}) &&
600: $env{'request.course.sec'} !~ /^\s*$/) {
601: $modifygrades =
602: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
603: '/'.$env{'request.course.sec'});
604: }
605: $Apache::lonhomework::modifygrades = $modifygrades;
606:
607: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
608: if (! $queuegrade &&
609: exists($env{'request.course.sec'}) &&
610: $env{'request.course.sec'} !~ /^\s*$/) {
611: $queuegrade =
612: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
613: '/'.$env{'request.course.sec'});
614: }
615: $Apache::lonhomework::queuegrade = $queuegrade;
616: return '';
617: }
618:
619: sub unset_permissions {
620: undef($Apache::lonhomework::queuegrade);
621: undef($Apache::lonhomework::modifygrades);
622: undef($Apache::lonhomework::viewgrades);
623: undef($Apache::lonhomework::browse);
624: }
625:
626: sub setupheader {
627: my $request=$_[0];
628: &Apache::loncommon::content_type($request,'text/html');
629: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
630: &Apache::loncommon::no_cache($request);
631: }
632: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
633: # 'lastrevisiondate'));
634: $request->send_http_header;
635: return OK if $request->header_only;
636: return ''
637: }
638:
639: sub handle_save_or_undo {
640: my ($request,$problem,$result) = @_;
641: my $file = &Apache::lonnet::filelocation("",$request->uri);
642: my $filebak =$file.".bak";
643: my $filetmp =$file.".tmp";
644: my $error=0;
645: if ($env{'form.Undo'} eq &mt('undo')) {
646: my $error=0;
647: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
648: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
649: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
650: if (!$error) {
651: &Apache::lonxml::info("<p><b>".
652: &mt("Undid changes, Switched [_1] and [_2]",
653: '<span class="LC_filename">'.$filebak.
654: '</span>',
655: '<span class="LC_filename">'.$file.
656: '</span>')."</b></p>");
657: } else {
658: &Apache::lonxml::info("<p><span class=\"LC_error\">".
659: &mt("Unable to undo, unable to switch [_1] and [_2]",
660: '<span class="LC_filename">'.
661: $filebak.'</span>',
662: '<span class="LC_filename">'.
663: $file.'</span>')."</span></p>");
664: $error=1;
665: }
666: } else {
667: &Apache::lonnet::correct_line_ends($result);
668: my $fs=Apache::File->new(">$filebak");
669: if (defined($fs)) {
670: print $fs $$problem;
671: } else {
672: &Apache::lonxml::info("<span class=\"LC_error\">".
673: &mt("Unable to make backup [_1]",
674: '<span class="LC_filename">'.
675: $filebak.'</span>')."</span>");
676: $error=2;
677: }
678: my $fh=Apache::File->new(">$file");
679: if (defined($fh)) {
680: print $fh $$result;
681: } else {
682: &Apache::lonxml::info('<span class="LC_error">'.
683: &mt("Unable to write to [_1]",
684: '<span class="LC_filename">'.
685: $file.'</span>').
686: '</span>');
687: $error|=4;
688: }
689: }
690: return $error;
691: }
692:
693: sub analyze_header {
694: my ($request) = @_;
695: my $js = &Apache::structuretags::setmode_javascript();
696:
697: # Breadcrumbs
698: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
699: 'text' => 'Construction Space'},
700: {'href' => '',
701: 'text' => 'Problem Testing'},
702: {'href' => '',
703: 'text' => 'Analyzing a problem'}];
704:
705: my $result =
706: &Apache::loncommon::start_page('Analyzing a problem',
707: $js,
708: {'bread_crumbs' => $brcrum,})
709: .&Apache::loncommon::head_subbox(
710: &Apache::loncommon::CSTR_pageheader());
711: $result .=
712: &Apache::lonxml::message_location().'
713: <form name="lonhomework" method="post" action="'.
714: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
715: '<input type="hidden" name="problemmode" value="'.
716: $env{'form.problemmode'}.'" />'.
717: &Apache::structuretags::remember_problem_state().'
718: <div class="LC_edit_problem_analyze_header">
719: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
720: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
721: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
722: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
723: <hr />
724: <input type="button" name="submitmode" value="'.&mt("View").'" '.
725: 'onclick="javascript:setmode(this.form,'."'view'".')" />
726: <hr />
727: </div>
728: </form>';
729: &Apache::lonxml::add_messages(\$result);
730: $request->print($result);
731: $request->rflush();
732: }
733:
734: sub analyze_footer {
735: my ($request) = @_;
736: $request->print(&Apache::loncommon::end_page());
737: $request->rflush();
738: }
739:
740: sub analyze {
741: my ($request,$file) = @_;
742: &Apache::lonxml::debug("Analyze");
743: my $result;
744: my %overall;
745: my %seedexample;
746: my %allparts;
747: my $rndseed=$env{'form.rndseed'};
748: &analyze_header($request);
749: my %prog_state=
750: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
751: &mt('Getting Problem Variants'),
752: $env{'form.numtoanalyze'},
753: 'inline',undef);
754: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
755: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
756: &mt('last problem'));
757: if (&Apache::loncommon::connection_aborted($request)) { return; }
758: my $thisseed=$i+$rndseed;
759: my $subresult=&Apache::lonnet::ssi($request->uri,
760: ('grade_target' => 'analyze'),
761: ('rndseed' => $thisseed));
762: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
763: my %analyze=&Apache::lonnet::str2hash($subresult);
764: my @parts;
765: if (defined(@{ $analyze{'parts'} })) {
766: @parts=@{ $analyze{'parts'} };
767: }
768: foreach my $part (@parts) {
769: if (!exists($allparts{$part})) {$allparts{$part}=1;};
770: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
771: $analyze{$part.'.type'} eq 'stringresponse' ||
772: $analyze{$part.'.type'} eq 'formularesponse' ) {
773: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
774: my $i=0;
775: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
776: push( @{ $overall{$part.'.answer'}[$i] },
777: $answer_part);
778: my $concatanswer= join("\0",@{ $answer_part });
779: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
780: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
781: }
782: $seedexample{join("\0",$part,$i,@{$answer_part})}=
783: $thisseed;
784: $i++;
785: }
786: }
787: if (!keys(%{ $analyze{$part.'.answer'} })) {
788: my $answer_part =
789: ['<span class="LC_error">'.&mt('Error').'</span>'];
790: $seedexample{join("\0",$part,0,@{$answer_part})}=
791: $thisseed;
792: push( @{ $overall{$part.'.answer'}[0] },
793: $answer_part);
794: }
795: }
796: }
797: }
798: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
799: &mt('Analyzing Results'));
800: $request->print('<hr />'
801: .'<h3>'
802: .&mt('List of possible answers')
803: .'</h3>'
804: );
805: foreach my $part (sort(keys(%allparts))) {
806: if (defined(@{ $overall{$part.'.answer'} })) {
807: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
808: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
809: $request->print(&Apache::loncommon::start_data_table()
810: .&Apache::loncommon::start_data_table_header_row()
811: .'<th colspan="'.($num_cols+1).'">'
812: .&mt('Part').' '.$part
813: );
814: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
815: $request->print(' '.&mt('Answer [_1]',$i+1));
816: }
817: $request->print('</th>'
818: .&Apache::loncommon::end_data_table_header_row()
819: );
820: my %frequency;
821: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
822: $frequency{join("\0",@{ $answer })}++;
823: }
824: $request->print(&Apache::loncommon::start_data_table_header_row()
825: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
826: .'<th>'.&mt('Frequency').'<br />'
827: .'('.&mt('click for example').')</th>'
828: .&Apache::loncommon::end_data_table_header_row()
829: );
830: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
831: $request->print(&Apache::loncommon::start_data_table_row()
832: .'<td>'
833: .join('</td><td>',split("\0",$answer))
834: .'</td>'
835: .'<td>'
836: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
837: .'</td>'
838: .&Apache::loncommon::end_data_table_row()
839: );
840: }
841: $request->print(&Apache::loncommon::end_data_table());
842: }
843: } else {
844: $request->print('<p class="LC_warning">'
845: .&mt('Response [_1] is not analyzable at this time.',$part)
846: .'</p>'
847: );
848: }
849: }
850: if (scalar(keys(%allparts)) == 0 ) {
851: $request->print('<p class="LC_warning">'
852: .&mt('Found no analyzable responses in this problem.'
853: .' Currently only Numerical, Formula and String response styles are supported.')
854: .'</p>'
855: );
856: }
857: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
858: &analyze_footer($request);
859: &Apache::lonhomework::showhash(%overall);
860: return $result;
861: }
862:
863: {
864: my $show_problem_status;
865: sub reset_show_problem_status {
866: undef($show_problem_status);
867: }
868:
869: sub set_show_problem_status {
870: my ($new_status) = @_;
871: $show_problem_status = lc($new_status);
872: }
873:
874: sub hide_problem_status {
875: return ($show_problem_status eq 'no'
876: || $show_problem_status eq 'no_feedback_ever');
877: }
878:
879: sub show_problem_status {
880: return ($show_problem_status eq 'yes'
881: || $show_problem_status eq 'answer'
882: || $show_problem_status eq '');
883: }
884:
885: sub show_some_problem_status {
886: return ($show_problem_status eq 'no');
887: }
888:
889: sub show_no_problem_status {
890: return ($show_problem_status eq 'no_feedback_ever');
891: }
892:
893: sub show_answer_problem_status {
894: return ($show_problem_status eq 'answer');
895: }
896: }
897:
898: sub editxmlmode {
899: my ($request,$file) = @_;
900: my $result;
901: my $problem=&Apache::lonnet::getfile($file);
902: if ($problem eq -1) {
903: &Apache::lonxml::error(
904: '<b> '
905: .&mt('Unable to find [_1]',
906: '<span class="LC_filename">'.$file.'</span>')
907: .'</b>');
908:
909: $problem='';
910: }
911: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
912: my $error=&handle_save_or_undo($request,\$problem,
913: \$env{'form.editxmltext'});
914: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
915: }
916: &Apache::lonhomework::showhashsubset(\%env,'^form');
917: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
918: &Apache::lonhomework::showhashsubset(\%env,'^form');
919: $env{'form.problemmode'}='view';
920: &renderpage($request,$file);
921: } else {
922: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
923: if ($cols > 80) { $cols = 80; }
924: if ($cols < 70) { $cols = 70; }
925: if ($rows < 20) { $rows = 20; }
926: my $js =
927: &Apache::edit::js_change_detection().
928: &Apache::loncommon::resize_textarea_js().
929: &Apache::structuretags::setmode_javascript().
930: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
931: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
932: my $dragmath_button =
933: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
934:
935: # Breadcrumbs
936: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
937: 'text' => 'Construction Space'},
938: {'href' => '',
939: 'text' => 'Problem Editing'}];
940:
941: my $start_page =
942: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
943: {'no_auto_mt_title' => 1,
944: 'only_body' => $only_body,
945: 'add_entries' => {
946: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
947: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
948: },
949: 'bread_crumbs' => $brcrum,
950: });
951:
952: $result=$start_page
953: .&Apache::loncommon::head_subbox(
954: &Apache::loncommon::CSTR_pageheader());
955: $result.=&renderpage($request,$file,['no_output_web'],1).
956: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
957: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
958: &Apache::structuretags::remember_problem_state().'
959: <div class="LC_edit_problem_editxml_header">
960: <table class="LC_edit_problem_header_title"><tr><td>
961: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
962: </td><td align="right">
963: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
964: </td></tr>
965: </table>
966: <div class="LC_edit_problem_discards">
967: <input type="hidden" name="problemmode" value="editxml" />
968:
969: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
970: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
971: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
972: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
973: '.$dragmath_button.'
974: </div>
975: <div class="LC_edit_problem_saves">
976: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
977: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
978: </div>
979: <hr style="clear:both;" />
980: '.&Apache::lonxml::message_location().'
981: </div>
982: ' . '
983: <textarea '.&Apache::edit::element_change_detection().
984: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
985: ' name="editxmltext" id="LC_editxmltext">'.
986: &HTML::Entities::encode($problem,'<>&"').'</textarea>
987: <div id="LC_aftertextarea">
988: </div>
989: </form>'.&Apache::loncommon::end_page();
990: &Apache::lonxml::add_messages(\$result);
991: $request->print($result);
992: }
993: return '';
994: }
995:
996: #
997: # Render the page in whatever target desired.
998: #
999: sub renderpage {
1000: my ($request,$file,$targets,$return_string) = @_;
1001:
1002: my @targets = @{$targets || [&get_target()]};
1003: &Apache::lonhomework::showhashsubset(\%env,'form.');
1004: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1005:
1006: my $overall_result;
1007: foreach my $target (@targets) {
1008: # FIXME need to do something intelligent when a problem goes
1009: # from viewable to not viewable due to map conditions
1010: #&setuppermissions();
1011: #if ( $Apache::lonhomework::browse ne '2'
1012: # && $Apache::lonhomework::browse ne 'F' ) {
1013: # $request->print(" You most likely shouldn't see me.");
1014: #}
1015: #my $t0 = [&gettimeofday()];
1016: my $output=1;
1017: if ($target eq 'no_output_web') {
1018: $target = 'web'; $output=0;
1019: }
1020: my $problem=&Apache::lonnet::getfile($file);
1021: my $result;
1022: if ($problem eq -1) {
1023: $problem='';
1024: my $filename=(split('/',$file))[-1];
1025: my $error =
1026: "<b> ".&mt('Unable to find [_1]',
1027: '<span class="LC_filename">'.$filename.'</span>')
1028: ."</b>";
1029: $result.=
1030: &Apache::loncommon::simple_error_page($request,'Not available',
1031: $error);
1032: return;
1033: }
1034:
1035: my %mystyle;
1036: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1037: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1038: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1039:
1040: &Apache::lonxml::debug("Should be parsing now");
1041: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1042: &setup_vars($target),%mystyle);
1043: &finished_parsing();
1044: if (!$output) { $result = ''; }
1045: #$request->print("Result follows:");
1046: if ($target eq 'modified') {
1047: &handle_save_or_undo($request,\$problem,\$result);
1048: } else {
1049: if ($target eq 'analyze') {
1050: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1051: undef(%Apache::lonhomework::analyze);
1052: }
1053: #my $td=&tv_interval($t0);
1054: #if ( $Apache::lonxml::debug) {
1055: #$result =~ s:</body>::;
1056: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1057: #}
1058: # $request->print($result);
1059: $overall_result.=$result;
1060: # $request->rflush();
1061: }
1062: #$request->print(":Result ends");
1063: #my $td=&tv_interval($t0);
1064: }
1065: if (!$return_string) {
1066: &Apache::lonxml::add_messages(\$overall_result);
1067: $request->print($overall_result);
1068: $request->rflush();
1069: } else {
1070: return $overall_result;
1071: }
1072: }
1073:
1074: sub finished_parsing {
1075: undef($Apache::lonhomework::parsing_a_problem);
1076: undef($Apache::lonhomework::parsing_a_task);
1077: }
1078:
1079: sub get_template_list {
1080: my ($extension) = @_;
1081: my $result;
1082: my @allnames;
1083: &Apache::lonxml::debug("Looking for :$extension:");
1084: my $glob_extension = $extension;
1085: if ($extension eq 'survey' || $extension eq 'exam') {
1086: $glob_extension = 'problem';
1087: }
1088: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1089: '/templates/*.'.$glob_extension);
1090: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1091: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1092: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1093: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1094: my ($midpoint,$seconddiv,$numfiles);
1095: $numfiles = 0;
1096: foreach my $file (@files) {
1097: next if ($file->[1] !~ /\S/);
1098: $numfiles ++;
1099: }
1100: if ($numfiles > 0) {
1101: $result = '<div class="LC_left_float">';
1102: $midpoint = int($numfiles/2);
1103: if ($numfiles%2) {
1104: $midpoint ++;
1105: }
1106: }
1107: my $count = 0;
1108: my $currentcategory='';
1109: my $first = 1;
1110: foreach my $file (@files) {
1111: next if ($file->[1] !~ /\S/);
1112: if ($file->[2] ne $currentcategory) {
1113: $currentcategory=$file->[2];
1114: if ((!$seconddiv) && ($count >= $midpoint)) {
1115: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1116: $seconddiv = 1;
1117: } elsif (!$first) {
1118: $result.='</div>'."\n";
1119: } else {
1120: $first = 0;
1121: }
1122: $result.= '<div class="LC_Box">'."\n"
1123: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1124: $count++;
1125: }
1126: $result .=
1127: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1128: $file->[1].'</label>';
1129: if ($file->[3]) {
1130: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1131: }
1132: my $filename=$file->[0];
1133: $filename=~s/^\/home\/httpd\/html//;
1134: $result.=' <span class="LC_fontsize_small">'
1135: .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1136: .'</span><br />'."\n";
1137: $count ++;
1138: }
1139: if ($numfiles > 0) {
1140: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1141: }
1142: return $result;
1143: }
1144:
1145: sub newproblem {
1146: my ($request) = @_;
1147:
1148: if ($env{'form.template'}) {
1149: my $file = $env{'form.template'};
1150: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1151: &File::Copy::copy($file,$dest);
1152: &renderpage($request,$dest);
1153: return;
1154: }
1155:
1156: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1157: &Apache::lonxml::debug("Looking for :$extension:");
1158: my $templatelist=&get_template_list($extension);
1159: if ($env{'form.newfile'} && !$templatelist) {
1160: # no templates found
1161: my $templatefilename =
1162: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1163: &Apache::lonxml::debug("$templatefilename");
1164: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1165: &File::Copy::copy($templatefilename,$dest);
1166: &renderpage($request,$dest);
1167: } else {
1168: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1169: my $shownurl=$url;
1170: $shownurl=~s-^/~-/priv/-;
1171: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1172: my $errormsg;
1173: my $instructions;
1174: my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1175: 'text' => 'Construction Space'},
1176: {'href' => '',
1177: 'text' => "Create New $extension"}];
1178: my $start_page =
1179: &Apache::loncommon::start_page("Create New $extension",
1180: undef,
1181: {'bread_crumbs' => $brcrum,});
1182: $request->print(
1183: $start_page
1184: .&Apache::loncommon::head_subbox(
1185: &Apache::loncommon::CSTR_pageheader())
1186: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1187: $errormsg
1188: ".&mt("The requested file [_1] currently does not exist.",
1189: '<span class="LC_filename">'.$shownurl.'</span>').'
1190: <p class="LC_info">
1191: '.&mt("To create a new $extension, select a template from the".
1192: " list below. Then click on the \"Create $extension\" button.").'
1193: </p><div><form action="'.$url.'" method="post">');
1194:
1195: if (defined($templatelist)) {
1196: $request->print($templatelist);
1197: }
1198: $request->print('<br /><input type="submit" name="newfile" value="'.
1199: &mt("Create $extension").'" />');
1200: $request->print('</form></div>'.&Apache::loncommon::end_page());
1201: }
1202: return;
1203: }
1204:
1205: sub update_construct_style {
1206: if ($env{'request.state'} eq "construct"
1207: && $env{'form.problemmode'} eq 'view'
1208: && defined($env{'form.submitted'})
1209: && !defined($env{'form.resetdata'})
1210: && !defined($env{'form.newrandomization'})) {
1211: if ((!$env{'form.style_file'} && $env{'construct.style'})
1212: ||$env{'form.clear_style_file'}) {
1213: &Apache::lonnet::delenv('construct.style');
1214: } elsif ($env{'form.style_file'}
1215: && $env{'construct.style'} ne $env{'form.style_file'}) {
1216: &Apache::lonnet::appenv({'construct.style' =>
1217: $env{'form.style_file'}});
1218: }
1219: }
1220: }
1221:
1222:
1223: sub handler {
1224: #my $t0 = [&gettimeofday()];
1225: my $request=$_[0];
1226: $Apache::lonxml::request=$request;
1227: $Apache::lonxml::debug=$env{'user.debug'};
1228: $env{'request.uri'}=$request->uri;
1229: &setuppermissions();
1230:
1231: my $file=&Apache::lonnet::filelocation("",$request->uri);
1232:
1233: #check if we know where we are
1234: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1235: # if we are browsing we might not be able to know where we are
1236: if ($Apache::lonhomework::browse ne 'F' &&
1237: $env{'request.state'} ne "construct") {
1238: #should know where we are, so ask
1239: &unset_permissions();
1240: $request->internal_redirect('/adm/ambiguous');
1241: return OK;
1242: }
1243: }
1244: if (&setupheader($request)) {
1245: &unset_permissions();
1246: return OK;
1247: }
1248: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1249: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1250: my ($symb) = &Apache::lonnet::whichuser();
1251: &Apache::lonxml::debug('symb is '.$symb);
1252: if ($env{'request.state'} eq "construct") {
1253: if ( -e $file ) {
1254: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1255: ['problemmode']);
1256: if (!(defined $env{'form.problemmode'})) {
1257: #first visit to problem in construction space
1258: $env{'form.problemmode'}= 'view';
1259: &renderpage($request,$file);
1260: } elsif ($env{'form.problemmode'} eq 'editxml') {
1261: &editxmlmode($request,$file);
1262: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1263: &analyze($request,$file);
1264: } else {
1265: &update_construct_style();
1266: &renderpage($request,$file);
1267: }
1268: } else {
1269: # requested file doesn't exist in contruction space
1270: &newproblem($request);
1271: }
1272: } else {
1273: # just render the page normally outside of construction space
1274: &Apache::lonxml::debug("not construct");
1275: &renderpage($request,$file);
1276: }
1277: #my $td=&tv_interval($t0);
1278: #&Apache::lonxml::debug("Spent $td seconds processing");
1279: # always turn off debug messages
1280: $Apache::lonxml::debug=0;
1281: &unset_permissions();
1282: return OK;
1283:
1284: }
1285:
1286: 1;
1287: __END__
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