1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.344.2.4 2016/08/08 12:07:20 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27:
28:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::functionplotresponse();
51: use Apache::drawimage();
52: use Apache::Constants qw(:common);
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use HTML::Entities();
57: use File::Copy();
58:
59: # FIXME - improve commenting
60:
61:
62: BEGIN {
63: &Apache::lonxml::register_insert();
64: }
65:
66:
67: =pod
68:
69: =item set_bubble_lines()
70:
71: Called at analysis time to set the bubble lines
72: hash for the problem.. This should be called in the
73: end_problemtype tag in analysis mode.
74:
75: We fetch the hash of part id counters from lonxml
76: and push them into analyze:{part_id.bubble_lines}.
77:
78: =cut
79:
80: sub set_bubble_lines {
81: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
82:
83: foreach my $key (keys(%bubble_counters)) {
84: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
85: $bubble_counters{"$key"};
86: }
87: }
88:
89: #
90: # Decides what targets to render for.
91: # Implicit inputs:
92: # Various session environment variables:
93: # request.state - published - is a /res/ resource
94: # uploaded - is a /uploaded/ resource
95: # contruct - is a /priv/ resource
96: # form.grade_target - a form parameter requesting a specific target
97: sub get_target {
98: &Apache::lonxml::debug("request.state = $env{'request.state'}");
99: if( defined($env{'form.grade_target'})) {
100: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
101: } else {
102: &Apache::lonxml::debug("form.grade_target <undefined>");
103: }
104: if (($env{'request.state'} eq "published") ||
105: ($env{'request.state'} eq "uploaded")) {
106: if ( defined($env{'form.grade_target'} )
107: && ($env{'form.grade_target'} eq 'tex')) {
108: return ($env{'form.grade_target'});
109: } elsif ( defined($env{'form.grade_target'} )
110: && ($Apache::lonhomework::viewgrades eq 'F' )) {
111: return ($env{'form.grade_target'});
112: } elsif ( $env{'form.grade_target'} eq 'webgrade'
113: && ($Apache::lonhomework::queuegrade eq 'F' )) {
114: return ($env{'form.grade_target'});
115: } elsif ($env{'form.grade_target'} eq 'answer') {
116: if ($env{'form.answer_output_mode'} eq 'tex') {
117: return ($env{'form.grade_target'});
118: }
119: }
120: if ($env{'form.webgrade'} &&
121: ($Apache::lonhomework::modifygrades eq 'F'
122: || $Apache::lonhomework::queuegrade eq 'F' )) {
123: return ('grade','webgrade');
124: }
125: if ( defined($env{'form.submitted'}) &&
126: ( !defined($env{'form.newrandomization'}))) {
127: return ('grade', 'web');
128: } else {
129: return ('web');
130: }
131: } elsif ($env{'request.state'} eq "construct") {
132: #
133: # We are in construction space, editing and testing problems
134: #
135: if ( defined($env{'form.grade_target'}) ) {
136: return ($env{'form.grade_target'});
137: }
138: if ( defined($env{'form.preview'})) {
139: if ( defined($env{'form.submitted'})) {
140: #
141: # We are doing a problem preview
142: #
143: return ('grade', 'web');
144: } else {
145: return ('web');
146: }
147: } else {
148: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
149: return ('grade','webgrade','answer');
150: } elsif ($env{'form.problemmode'} eq 'view') {
151: return ('grade','web','answer');
152: } elsif ($env{'form.problemmode'} eq 'saveview') {
153: return ('modified','web','answer');
154: } elsif ($env{'form.problemmode'} eq 'discard') {
155: return ('web','answer');
156: } elsif (($env{'form.problemmode'} eq 'saveedit') ||
157: ($env{'form.problemmode'} eq 'undo')) {
158: return ('modified','no_output_web','edit');
159: } elsif ($env{'form.problemmode'} eq 'edit') {
160: return ('no_output_web','edit');
161: } else {
162: return ('web');
163: }
164: }
165: #
166: # End of Authoring Space
167: #
168: }
169: #
170: # Huh? We are nowhere, so do nothing.
171: #
172: return ();
173: }
174:
175: sub setup_vars {
176: my ($target) = @_;
177: return ';'
178: # return ';$external::target='.$target.';';
179: }
180:
181: sub proctor_checked_in {
182: my ($slot_name,$slot,$type)=@_;
183: my @possible_proctors=split(",",$slot->{'proctor'});
184:
185: return 1 if (!@possible_proctors);
186:
187: my $key;
188: if ($type eq 'Task') {
189: my $version=$Apache::lonhomework::history{'resource.0.version'};
190: $key ="resource.$version.0.checkedin";
191: } elsif ($type eq 'problem') {
192: $key ='resource.0.checkedin';
193: }
194: # backward compatability, used to be username@domain,
195: # now is username:domain
196: my $who = $Apache::lonhomework::history{$key};
197: if ($who !~ /:/) {
198: $who =~ tr/@/:/;
199: }
200: foreach my $possible (@possible_proctors) {
201: if ($who eq $possible
202: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
203: return 1;
204: }
205: }
206:
207: return 0;
208: }
209:
210: sub check_slot_access {
211: my ($id,$type,$symb,$partlist)=@_;
212:
213: # does it pass normal muster
214: my ($status,$datemsg)=&check_access($id,$symb);
215:
216: my $useslots = &Apache::lonnet::EXT("resource.0.useslots",$symb);
217: if ($useslots ne 'resource' && $useslots ne 'map'
218: && $useslots ne 'map_map') {
219: return ($status,$datemsg);
220: }
221:
222: if ($status eq 'SHOW_ANSWER' ||
223: $status eq 'CLOSED' ||
224: $status eq 'INVALID_ACCESS' ||
225: $status eq 'UNAVAILABLE') {
226: return ($status,$datemsg);
227: }
228: if ($env{'request.state'} eq "construct") {
229: return ($status,$datemsg);
230: }
231:
232: if ($type eq 'Task') {
233: my $version=$Apache::lonhomework::history{'resource.version'};
234: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
235: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
236: return ('SHOW_ANSWER');
237: }
238: }
239:
240: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent",$symb);
241: my $available = &Apache::lonnet::EXT("resource.0.available",$symb);
242: my @slots= (split(':',$availablestudent),split(':',$available));
243:
244: # if (!@slots) {
245: # return ($status,$datemsg);
246: # }
247: my $slotstatus='NOT_IN_A_SLOT';
248: my ($returned_slot,$slot_name);
249: my $now = time;
250: my $num_usable_slots = 0;
251: unless ($symb) {
252: ($symb) = &Apache::lonnet::whichuser();
253: }
254: foreach my $slot (@slots) {
255: $slot =~ s/(^\s*|\s*$)//g;
256: &Apache::lonxml::debug("getting $slot");
257: my %slot=&Apache::lonnet::get_slot($slot);
258: &Apache::lonhomework::showhash(%slot);
259: next if ($slot{'endtime'} < $now);
260: $num_usable_slots ++;
261: if ($slot{'starttime'} < $now &&
262: $slot{'endtime'} > $now &&
263: &Apache::loncommon::check_ip_acc($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,$checkin,$checkinslot,$checkedin,$consumed_uniq);
278: if ($type eq 'Task') {
279: my $version=$Apache::lonhomework::history{'resource.0.version'};
280: $checkin = "resource.$version.0.checkedin";
281: $got_grade =
282: ($Apache::lonhomework::history{"resource.$version.0.status"}
283: =~ /^(?:pass|fail)$/);
284: $is_correct =
285: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
286: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
287: $checkedin =
288: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
289: } elsif ($type eq 'problem') {
290: $checkin = 'resource.0.checkedin';
291: $checkedin = $Apache::lonhomework::history{$checkin};
292: }
293: if ($checkedin) {
294: $checkinslot = $Apache::lonhomework::history{"$checkin.slot"};
295: my %slot=&Apache::lonnet::get_slot($checkinslot);
296: $consumed_uniq = $slot{'uniqueperiod'};
297: }
298: if ($type eq 'problem') {
299: if ((ref($partlist) eq 'ARRAY') && (@{$partlist} > 0)) {
300: my ($numcorrect,$numgraded) = (0,0);
301: foreach my $part (@{$partlist}) {
302: my $currtries = $Apache::lonhomework::history{"resource.$part.tries"};
303: my $maxtries = &Apache::lonnet::EXT("resource.$part.maxtries",$symb);
304: my $probstatus = &Apache::structuretags::get_problem_status($part);
305: my $earlyout;
306: unless (($probstatus eq 'no') ||
307: ($probstatus eq 'no_feedback_ever')) {
308: if ($Apache::lonhomework::history{"resource.$part.solved"} =~/^correct_/) {
309: $numcorrect ++;
310: } else {
311: $earlyout = 1;
312: }
313: }
314: if (($currtries == $maxtries) || ($is_correct)) {
315: $earlyout = 1;
316: } else {
317: $numgraded ++;
318: }
319: last if ($earlyout);
320: }
321: my $numparts = scalar(@{$partlist});
322: if ($numparts == $numcorrect) {
323: $is_correct = 1;
324: }
325: if ($numparts == $numgraded) {
326: $got_grade = 1;
327: }
328: } else {
329: my $currtries = $Apache::lonhomework::history{"resource.0.tries"};
330: my $maxtries = &Apache::lonnet::EXT("resource.0.maxtries",$symb);
331: my $probstatus = &Apache::structuretags::get_problem_status('0');
332: unless (($probstatus eq 'no') ||
333: ($probstatus eq 'no_feedback_ever')) {
334: $is_correct =
335: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
336: }
337: unless (($currtries == $maxtries) || ($is_correct)) {
338: $got_grade = 1;
339: }
340: }
341: }
342:
343: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
344:
345: # no slot is currently open, and has been checked in for this version
346: # but hasn't got a grade, therefore must be awaiting a grade
347: if (!defined($slot_name)
348: && $checkedin
349: && !$got_grade) {
350: return ('WAITING_FOR_GRADE');
351: }
352:
353: # Previously used slot is no longer open, and has been checked in for this version.
354: # However, the problem is not closed, and potentially, another slot might be
355: # used to gain access to it to work on it, until the due date is reached, and the
356: # problem then becomes CLOSED. Therefore return the slotstatus -
357: # (which will be one of: NOT_IN_A_SLOT, RESERVABLE, RESERVABLE_LATER, or NOTRESERVABLE.
358: if (!defined($slot_name) && $type eq 'problem') {
359: if ($slotstatus eq 'NOT_IN_A_SLOT') {
360: if (!$num_usable_slots) {
361: if ($env{'request.course.id'}) {
362: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
363: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
364: $slotstatus = 'NOTRESERVABLE';
365: my ($reservable_now_order,$reservable_now,$reservable_future_order,
366: $reservable_future) =
367: &Apache::loncommon::get_future_slots($cnum,$cdom,$now,$symb);
368: if ((ref($reservable_now_order) eq 'ARRAY') && (ref($reservable_now) eq 'HASH')) {
369: if (@{$reservable_now_order} > 0) {
370: if ((!$checkedin) || (ref($consumed_uniq) ne 'ARRAY')) {
371: $slotstatus = 'RESERVABLE';
372: $datemsg = $reservable_now->{$reservable_now_order->[-1]}{'endreserve'};
373: } else {
374: my ($uniqstart,$uniqend,$useslot);
375: if (ref($consumed_uniq) eq 'ARRAY') {
376: ($uniqstart,$uniqend)=@{$consumed_uniq};
377: }
378: foreach my $slot (reverse(@{$reservable_now_order})) {
379: if ($reservable_now->{$slot}{'uniqueperiod'} =~ /^(\d+)\,(\d+)$/) {
380: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
381: next if (!
382: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
383: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
384: }
385: $useslot = $slot;
386: last;
387: }
388: if ($useslot) {
389: $slotstatus = 'RESERVABLE';
390: $datemsg = $reservable_now->{$useslot}{'endreserve'};
391: }
392: }
393: }
394: }
395: unless ($slotstatus eq 'RESERVABLE') {
396: if ((ref($reservable_future_order) eq 'ARRAY') && (ref($reservable_future) eq 'HASH')) {
397: if (@{$reservable_future_order} > 0) {
398: if ((!$checkedin) || (ref($consumed_uniq) ne 'ARRAY')) {
399: $slotstatus = 'RESERVABLE_LATER';
400: $datemsg = $reservable_future->{$reservable_future_order->[0]}{'startreserve'};
401: } else {
402: my ($uniqstart,$uniqend,$useslot);
403: if (ref($consumed_uniq) eq 'ARRAY') {
404: ($uniqstart,$uniqend)=@{$consumed_uniq};
405: }
406: foreach my $slot (@{$reservable_future_order}) {
407: if ($reservable_future->{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
408: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
409: next if (!
410: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
411: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
412: }
413: $useslot = $slot;
414: last;
415: }
416: if ($useslot) {
417: $slotstatus = 'RESERVABLE_LATER';
418: $datemsg = $reservable_future->{$useslot}{'startreserve'};
419: }
420: }
421: }
422: }
423: }
424: }
425: }
426: }
427: return ($slotstatus,$datemsg);
428: }
429:
430: if ($slotstatus eq 'NOT_IN_A_SLOT'
431: && $checkedin ) {
432:
433: if ($got_grade) {
434: return ('SHOW_ANSWER');
435: } else {
436: return ('WAITING_FOR_GRADE');
437: }
438:
439: }
440:
441: if ( $is_correct) {
442: if ($type eq 'problem') {
443: return ($status);
444: }
445: return ('SHOW_ANSWER');
446: }
447:
448: if ( $status eq 'CANNOT_ANSWER' &&
449: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
450: return ($status,$datemsg);
451: }
452:
453: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
454: }
455:
456: # JB, 9/24/2002: Any changes in this function may require a change
457: # in lonnavmaps::resource::getDateStatus.
458: sub check_access {
459: my ($id,$symb) = @_;
460: my $date ='';
461: my $status;
462: my $datemsg = '';
463: my $lastdate = '';
464: my $type;
465: my $passed;
466:
467: if ($env{'request.state'} eq "construct") {
468: if ($env{'form.problemstate'}) {
469: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
470: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
471: && &hide_problem_status())) {
472: return ('CANNOT_ANSWER',
473: &mt('is in this state due to author settings.'));
474: }
475: } else {
476: return ($env{'form.problemstate'},
477: &mt('is in this state due to author settings.'));
478: }
479: }
480: &Apache::lonxml::debug("in construction ignoring dates");
481: $status='CAN_ANSWER';
482: $datemsg=&mt('is in under construction');
483: # return ($status,$datemsg);
484: }
485:
486: &Apache::lonxml::debug("checking for part :$id:");
487: &Apache::lonxml::debug("time:".time);
488:
489: unless ($symb) {
490: ($symb)=&Apache::lonnet::whichuser();
491: }
492: &Apache::lonxml::debug("symb:".$symb);
493: #if ($env{'request.state'} ne "construct" && $symb ne '') {
494: if ($env{'request.state'} ne "construct") {
495: my $idacc = &Apache::lonnet::EXT("resource.$id.acc",$symb);
496: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
497: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
498: $status='INVALID_ACCESS';
499: $date=&mt("can not be accessed from your location.");
500: return($status,$date);
501: }
502: if ($env{'form.grade_imsexport'}) {
503: if (($env{'request.course.id'}) &&
504: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
505: return ('SHOW_ANSWER');
506: }
507: }
508: foreach my $temp ("opendate","duedate","answerdate") {
509: $lastdate = $date;
510: if ($temp eq 'duedate') {
511: $date = &due_date($id,$symb);
512: } else {
513: $date = &Apache::lonnet::EXT("resource.$id.$temp",$symb);
514: }
515:
516: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type",$symb);
517: if ($thistype =~ /^(con_lost|no_such_host)/ ||
518: $date =~ /^(con_lost|no_such_host)/) {
519: $status='UNAVAILABLE';
520: $date=&mt("may open later.");
521: return($status,$date);
522: }
523: if ($thistype eq 'date_interval') {
524: if ($temp eq 'opendate') {
525: $date=&Apache::lonnet::EXT("resource.$id.duedate",$symb)-$date;
526: }
527: if ($temp eq 'answerdate') {
528: $date=&Apache::lonnet::EXT("resource.$id.duedate",$symb)+$date;
529: }
530: }
531: &Apache::lonxml::debug("found :$date: for :$temp:");
532: if ($date eq '') {
533: $date = &mt("an unknown date"); $passed = 0;
534: } elsif ($date eq 'con_lost') {
535: $date = &mt("an indeterminate date"); $passed = 0;
536: } else {
537: if (time < $date) { $passed = 0; } else { $passed = 1; }
538: $date = &Apache::lonlocal::locallocaltime($date);
539: }
540: if (!$passed) { $type=$temp; last; }
541: }
542: &Apache::lonxml::debug("have :$type:$passed:");
543: if ($passed) {
544: $status='SHOW_ANSWER';
545: $datemsg=$date;
546: } elsif ($type eq 'opendate') {
547: $status='CLOSED';
548: $datemsg = &mt('will open on [_1]',$date);
549: } elsif ($type eq 'duedate') {
550: $status='CAN_ANSWER';
551: $datemsg = &mt('is due at [_1]',$date);
552: } elsif ($type eq 'answerdate') {
553: $status='CLOSED';
554: $datemsg = &mt('was due on [_1], and answers will be available on [_2]',
555: $lastdate,$date);
556: }
557: }
558: if ($status eq 'CAN_ANSWER' ||
559: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
560: #check #tries, and if correct.
561: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
562: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries",$symb);
563: if ( $tries eq '' ) { $tries = '0'; }
564: if ( $maxtries eq '' &&
565: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
566: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
567: # if (correct and show prob status) or excused then CANNOT_ANSWER
568: if ( ($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/)
569: && (&show_problem_status()) ) {
570: if (($Apache::lonhomework::history{"resource.$id.awarded"} >= 1) ||
571: (&Apache::lonnet::EXT("resource.$id.retrypartial",$symb) !~/^1|on|yes$/i)) {
572: $status = 'CANNOT_ANSWER';
573: }
574: } elsif ($Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
575: $status = 'CANNOT_ANSWER';
576: }
577: if ($status eq 'CANNOT_ANSWER'
578: && &show_answer_problem_status()) {
579: $status = 'SHOW_ANSWER';
580: }
581: }
582: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
583: my @interval=&Apache::lonnet::EXT("resource.$id.interval",$symb);
584: &Apache::lonxml::debug("looking for interval @interval");
585: if ($interval[0]) {
586: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
587: &Apache::lonxml::debug("looking for accesstime $first_access");
588: if (!$first_access) {
589: $status='NOT_YET_VIEWED';
590: my $due_date = &due_date($id,$symb);
591: my $seconds_left = $due_date - time;
592: if ($seconds_left > $interval[0] || $due_date eq '') {
593: $seconds_left = $interval[0];
594: }
595: $datemsg=&seconds_to_human_length($seconds_left);
596: }
597: }
598: }
599:
600: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
601: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
602: # return ('UNCHECKEDOUT','needs to be checked out');
603: #}
604:
605: &Apache::lonxml::debug("sending back :$status:$datemsg:");
606: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
607: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
608: $status='CAN_ANSWER';
609: $datemsg=&mt('is closed but you are allowed to view it');
610: }
611:
612: return ($status,$datemsg);
613: }
614: # this should work exactly like the copy in lonnavmaps.pm
615: sub due_date {
616: my ($part_id,$symb,$udom,$uname)=@_;
617: my $date;
618: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
619: $udom,$uname);
620: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
621: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
622: $udom,$uname);
623: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
624: if ($interval[0] =~ /\d+/) {
625: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
626: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
627: if (defined($first_access)) {
628: my $interval = $first_access+$interval[0];
629: $date = (!$due_date || $interval < $due_date) ? $interval
630: : $due_date;
631: } else {
632: $date = $due_date;
633: }
634: } else {
635: $date = $due_date;
636: }
637: return $date;
638: }
639:
640: sub seconds_to_human_length {
641: my ($length)=@_;
642:
643: my $seconds=$length%60; $length=int($length/60);
644: my $minutes=$length%60; $length=int($length/60);
645: my $hours=$length%24; $length=int($length/24);
646: my $days=$length;
647:
648: my $timestr;
649: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
650: if ($hours > 0) { $timestr.=($timestr?", ":"").
651: &mt('[quant,_1,hour]',$hours); }
652: if ($minutes > 0) { $timestr.=($timestr?", ":"").
653: &mt('[quant,_1,minute]',$minutes); }
654: if ($seconds > 0) { $timestr.=($timestr?", ":"").
655: &mt('[quant,_1,second]',$seconds); }
656: return $timestr;
657: }
658:
659: sub showhash {
660: my (%hash) = @_;
661: &showhashsubset(\%hash,'.');
662: return '';
663: }
664:
665: sub showarray {
666: my ($array)=@_;
667: my $string="(";
668: foreach my $elm (@{ $array }) {
669: if (ref($elm) eq 'ARRAY') {
670: $string.=&showarray($elm);
671: } elsif (ref($elm) eq 'HASH') {
672: $string.= "HASH --- \n<br />";
673: $string.= &showhashsubset($elm,'.');
674: } else {
675: $string.="$elm,"
676: }
677: }
678: chop($string);
679: $string.=")";
680: return $string;
681: }
682:
683: sub showhashsubset {
684: my ($hash,$keyre) = @_;
685: my $resultkey;
686: foreach $resultkey (sort(keys(%$hash))) {
687: if ($resultkey !~ /$keyre/) { next; }
688: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
689: &Apache::lonxml::debug("$resultkey ---- ".
690: &showarray($$hash{$resultkey}));
691: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
692: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
693: &showhashsubset($$hash{$resultkey},'.');
694: } else {
695: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
696: }
697: }
698: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
699: return '';
700: }
701:
702: sub setuppermissions {
703: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
704: unless ($Apache::lonhomework::browse eq 'F') {
705: $Apache::lonhomework::browse=&Apache::lonnet::allowed('bro',$env{'request.filename'});
706: }
707: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
708: if (! $viewgrades &&
709: exists($env{'request.course.sec'}) &&
710: $env{'request.course.sec'} !~ /^\s*$/) {
711: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
712: '/'.$env{'request.course.sec'});
713: }
714: $Apache::lonhomework::viewgrades = $viewgrades;
715:
716: if ($Apache::lonhomework::browse eq 'F' &&
717: $env{'form.devalidatecourseresdata'} eq 'on') {
718: my (undef,$courseid) = &Apache::lonnet::whichuser();
719: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
720: $env{"course.$courseid.domain"});
721: }
722:
723: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
724: if (! $modifygrades &&
725: exists($env{'request.course.sec'}) &&
726: $env{'request.course.sec'} !~ /^\s*$/) {
727: $modifygrades =
728: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
729: '/'.$env{'request.course.sec'});
730: }
731: $Apache::lonhomework::modifygrades = $modifygrades;
732:
733: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
734: if (! $queuegrade &&
735: exists($env{'request.course.sec'}) &&
736: $env{'request.course.sec'} !~ /^\s*$/) {
737: $queuegrade =
738: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
739: '/'.$env{'request.course.sec'});
740: }
741: $Apache::lonhomework::queuegrade = $queuegrade;
742: return '';
743: }
744:
745: sub unset_permissions {
746: undef($Apache::lonhomework::queuegrade);
747: undef($Apache::lonhomework::modifygrades);
748: undef($Apache::lonhomework::viewgrades);
749: undef($Apache::lonhomework::browse);
750: }
751:
752: sub setupheader {
753: my $request=$_[0];
754: &Apache::loncommon::content_type($request,'text/html');
755: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
756: &Apache::loncommon::no_cache($request);
757: }
758: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
759: # 'lastrevisiondate'));
760: $request->send_http_header;
761: return OK if $request->header_only;
762: return ''
763: }
764:
765: sub handle_save_or_undo {
766: my ($request,$problem,$result,$getobjref) = @_;
767:
768: my $file = &Apache::lonnet::filelocation("",$request->uri);
769: my $filebak =$file.".bak";
770: my $filetmp =$file.".tmp";
771: my $error=0;
772: if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
773: my $error=0;
774: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
775: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
776: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
777: if (!$error) {
778: &Apache::lonxml::info("<p><b>".
779: &mt("Undid changes, Switched [_1] and [_2]",
780: '<span class="LC_filename">'.$filebak.
781: '</span>',
782: '<span class="LC_filename">'.$file.
783: '</span>')."</b></p>");
784: } else {
785: &Apache::lonxml::info("<p><span class=\"LC_error\">".
786: &mt("Unable to undo, unable to switch [_1] and [_2]",
787: '<span class="LC_filename">'.
788: $filebak.'</span>',
789: '<span class="LC_filename">'.
790: $file.'</span>')."</span></p>");
791: $error=1;
792: }
793: } else {
794: &Apache::lonnet::correct_line_ends($result);
795:
796: my $fs=Apache::File->new(">$filebak");
797: if (defined($fs)) {
798: print $fs $$problem;
799: } else {
800: &Apache::lonxml::info("<span class=\"LC_error\">".
801: &mt("Unable to make backup [_1]",
802: '<span class="LC_filename">'.
803: $filebak.'</span>')."</span>");
804: $error=2;
805: }
806: my $fh=Apache::File->new(">$file");
807: if (defined($fh)) {
808: print $fh $$result;
809: if (ref($getobjref) eq 'SCALAR') {
810: if ($file =~ m{([^/]+)\.(html?)$}) {
811: my $fname = $1;
812: my $ext = $2;
813: my $path = $file;
814: $path =~ s/\Q$fname\E\.\Q$ext\E$//;
815: my (%allfiles,%codebase);
816: &Apache::lonnet::extract_embedded_items($file,\%allfiles,
817: \%codebase,$result);
818: if (keys(%allfiles) > 0) {
819: my $url = $request->uri;
820: my $state = <<STATE;
821: <input type="hidden" name="action" value="upload_embedded" />
822: <input type="hidden" name="url" value="$url" />
823: STATE
824: $$getobjref = "<h3>".&mt("Reference Warning")."</h3>".
825: "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
826: "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
827: &Apache::loncommon::ask_for_embedded_content($url,$state,\%allfiles,\%codebase,
828: {'error_on_invalid_names' => 1,
829: 'ignore_remote_references' => 1,});
830: }
831: }
832: }
833: } else {
834: &Apache::lonxml::info('<span class="LC_error">'.
835: &mt("Unable to write to [_1]",
836: '<span class="LC_filename">'.
837: $file.'</span>').
838: '</span>');
839: $error|=4;
840: }
841: }
842: return $error;
843: }
844:
845: sub analyze_header {
846: my ($request) = @_;
847: my $js = &Apache::structuretags::setmode_javascript();
848:
849: # Breadcrumbs
850: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
851: 'text' => 'Authoring Space'},
852: {'href' => '',
853: 'text' => 'Problem Testing'},
854: {'href' => '',
855: 'text' => 'Analyzing a problem'}];
856:
857: my $result =
858: &Apache::loncommon::start_page('Analyzing a problem',
859: $js,
860: {'bread_crumbs' => $brcrum,})
861: .&Apache::loncommon::head_subbox(
862: &Apache::loncommon::CSTR_pageheader());
863: $result .=
864: &Apache::lonxml::message_location().'
865: <form name="lonhomework" method="post" action="'.
866: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
867: '<input type="hidden" name="problemmode" value="'.
868: $env{'form.problemmode'}.'" />'.
869: &Apache::structuretags::remember_problem_state().'
870: <div class="LC_edit_problem_analyze_header">
871: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
872: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
873: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
874: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
875: <hr />
876: <input type="button" name="submitmode" value="'.&mt("View").'" '.
877: 'onclick="javascript:setmode(this.form,'."'view'".')" />
878: <hr />
879: </div>
880: </form>';
881: &Apache::lonxml::add_messages(\$result);
882: $request->print($result);
883: $request->rflush();
884: }
885:
886: sub analyze_footer {
887: my ($request) = @_;
888: $request->print(&Apache::loncommon::end_page());
889: $request->rflush();
890: }
891:
892: sub analyze {
893: my ($request,$file) = @_;
894: &Apache::lonxml::debug("Analyze");
895: my $result;
896: my %overall;
897: my %seedexample;
898: my %allparts;
899: my $rndseed=$env{'form.rndseed'};
900: &analyze_header($request);
901: my %prog_state=
902: &Apache::lonhtmlcommon::Create_PrgWin($request,$env{'form.numtoanalyze'});
903: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
904: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,'last problem');
905: if (&Apache::loncommon::connection_aborted($request)) { return; }
906: my $thisseed=$i+$rndseed;
907: my $subresult=&Apache::lonnet::ssi($request->uri,
908: ('grade_target' => 'analyze'),
909: ('rndseed' => $thisseed));
910: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
911: my %analyze=&Apache::lonnet::str2hash($subresult);
912: my @parts;
913: if (ref($analyze{'parts'}) eq 'ARRAY') {
914: @parts=@{ $analyze{'parts'} };
915: }
916: foreach my $part (@parts) {
917: if (!exists($allparts{$part})) {$allparts{$part}=1;};
918: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
919: $analyze{$part.'.type'} eq 'stringresponse' ||
920: $analyze{$part.'.type'} eq 'formularesponse' ) {
921: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
922: my $i=0;
923: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
924: push( @{ $overall{$part.'.answer'}[$i] },
925: $answer_part);
926: my $concatanswer= join("\0",@{ $answer_part });
927: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
928: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
929: }
930: $seedexample{join("\0",$part,$i,@{$answer_part})}=
931: $thisseed;
932: $i++;
933: }
934: }
935: if (!keys(%{ $analyze{$part.'.answer'} })) {
936: my $answer_part =
937: ['<span class="LC_error">'.&mt('Error').'</span>'];
938: $seedexample{join("\0",$part,0,@{$answer_part})}=
939: $thisseed;
940: push( @{ $overall{$part.'.answer'}[0] },
941: $answer_part);
942: }
943: }
944: }
945: }
946: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,&mt('Analyzing Results'));
947: $request->print('<hr />'
948: .'<h3>'
949: .&mt('List of possible answers')
950: .'</h3>'
951: );
952: foreach my $part (sort(keys(%allparts))) {
953: if ((ref($overall{$part.'.answer'}) eq 'ARRAY') &&
954: (@{$overall{$part.'.answer'}} > 0)) {
955: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
956: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
957: $request->print(&Apache::loncommon::start_data_table()
958: .&Apache::loncommon::start_data_table_header_row()
959: .'<th colspan="'.($num_cols+1).'">'
960: .&mt('Part').' '.$part
961: );
962: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
963: $request->print(' '.&mt('Answer [_1]',$i+1));
964: }
965: $request->print('</th>'
966: .&Apache::loncommon::end_data_table_header_row()
967: );
968: my %frequency;
969: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
970: $frequency{join("\0",@{ $answer })}++;
971: }
972: $request->print(&Apache::loncommon::start_data_table_header_row()
973: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
974: .'<th>'.&mt('Frequency').'<br />'
975: .'('.&mt('click for example').')</th>'
976: .&Apache::loncommon::end_data_table_header_row()
977: );
978: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
979: $request->print(&Apache::loncommon::start_data_table_row()
980: .'<td>'
981: .join('</td><td>',split("\0",$answer))
982: .'</td>'
983: .'<td>'
984: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
985: .'</td>'
986: .&Apache::loncommon::end_data_table_row()
987: );
988: }
989: $request->print(&Apache::loncommon::end_data_table());
990: }
991: } else {
992: $request->print('<p class="LC_warning">'
993: .&mt('Response [_1] is not analyzable at this time.',$part)
994: .'</p>'
995: );
996: }
997: }
998: if (scalar(keys(%allparts)) == 0 ) {
999: $request->print('<p class="LC_warning">'
1000: .&mt('Found no analyzable responses in this problem.'
1001: .' Currently only Numerical, Formula and String response styles are supported.')
1002: .'</p>'
1003: );
1004: }
1005: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1006: &analyze_footer($request);
1007: &Apache::lonhomework::showhash(%overall);
1008: return $result;
1009: }
1010:
1011: {
1012: my $show_problem_status;
1013: sub reset_show_problem_status {
1014: undef($show_problem_status);
1015: }
1016:
1017: sub set_show_problem_status {
1018: my ($new_status) = @_;
1019: $show_problem_status = lc($new_status);
1020: }
1021:
1022: sub hide_problem_status {
1023: return ($show_problem_status eq 'no'
1024: || $show_problem_status eq 'no_feedback_ever');
1025: }
1026:
1027: sub show_problem_status {
1028: return ($show_problem_status eq 'yes'
1029: || $show_problem_status eq 'answer'
1030: || $show_problem_status eq '');
1031: }
1032:
1033: sub show_some_problem_status {
1034: return ($show_problem_status eq 'no');
1035: }
1036:
1037: sub show_no_problem_status {
1038: return ($show_problem_status eq 'no_feedback_ever');
1039: }
1040:
1041: sub show_answer_problem_status {
1042: return ($show_problem_status eq 'answer');
1043: }
1044: }
1045:
1046: sub editxmlmode {
1047: my ($request,$file) = @_;
1048: my $result;
1049: my $problem=&Apache::lonnet::getfile($file);
1050: if ($problem eq -1) {
1051: &Apache::lonxml::error(
1052: '<p class="LC_error">'
1053: .&mt('Unable to find [_1]',
1054: '<span class="LC_filename">'.$file.'</span>')
1055: .'</p>');
1056:
1057: $problem='';
1058: }
1059:
1060: if (($env{'form.problemmode'} eq 'saveeditxml') ||
1061: ($env{'form.problemmode'} eq 'saveviewxml') ||
1062: ($env{'form.problemmode'} eq 'undoxml')) {
1063: my $error=&handle_save_or_undo($request,\$problem,
1064: \$env{'form.editxmltext'});
1065: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
1066: }
1067: &Apache::lonhomework::showhashsubset(\%env,'^form');
1068: if ($env{'form.problemmode'} eq 'saveviewxml') {
1069: &Apache::lonhomework::showhashsubset(\%env,'^form');
1070: $env{'form.problemmode'}='view';
1071: &renderpage($request,$file);
1072: } else {
1073: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1074: if ($cols > 80) { $cols = 80; }
1075: if ($cols < 70) { $cols = 70; }
1076: if ($rows < 20) { $rows = 20; }
1077: my $js =
1078: &Apache::edit::js_change_detection().
1079: &Apache::loncommon::resize_textarea_js().
1080: &Apache::structuretags::setmode_javascript().
1081: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1082:
1083: # Breadcrumbs
1084: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1085: 'text' => 'Authoring Space'},
1086: {'href' => '',
1087: 'text' => 'Problem Editing'}];
1088:
1089: my $start_page =
1090: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
1091: {'no_auto_mt_title' => 1,
1092: 'only_body' => 0,
1093: 'add_entries' => {
1094: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1095: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1096: },
1097: 'bread_crumbs' => $brcrum,
1098: });
1099:
1100: $result=$start_page
1101: .&Apache::loncommon::head_subbox(
1102: &Apache::loncommon::CSTR_pageheader());
1103: $result.=&renderpage($request,$file,['no_output_web'],1).
1104: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
1105: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1106: &Apache::structuretags::remember_problem_state().'
1107: <div class="LC_edit_problem_editxml_header">
1108: <table class="LC_edit_problem_header_title"><tr><td>
1109: <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
1110: </td><td align="right">
1111: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
1112: </td></tr>
1113: </table>';
1114:
1115: $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
1116: &Apache::structuretags::problem_edit_buttons('editxml');
1117:
1118: $result.='<hr style="clear:both;" />'.&Apache::lonxml::message_location().'</div>'.
1119: '<textarea '.&Apache::edit::element_change_detection().
1120: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
1121: ' name="editxmltext" id="LC_editxmltext">'.
1122: &HTML::Entities::encode($problem,'<>&"').'</textarea>
1123: <div id="LC_aftertextarea">
1124: </div>
1125: </form>'.&Apache::loncommon::end_page();
1126: &Apache::lonxml::add_messages(\$result);
1127: $request->print($result);
1128: }
1129: return '';
1130: }
1131:
1132: #
1133: # Render the page in whatever target desired.
1134: #
1135: sub renderpage {
1136: my ($request,$file,$targets,$return_string) = @_;
1137:
1138: my @targets = @{$targets || [&get_target()]};
1139: &Apache::lonhomework::showhashsubset(\%env,'form.');
1140: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1141:
1142: my $overall_result;
1143: foreach my $target (@targets) {
1144: # FIXME need to do something intelligent when a problem goes
1145: # from viewable to not viewable due to map conditions
1146: #&setuppermissions();
1147: #if ( $Apache::lonhomework::browse ne '2'
1148: # && $Apache::lonhomework::browse ne 'F' ) {
1149: # $request->print(" You most likely shouldn't see me.");
1150: #}
1151: #my $t0 = [&gettimeofday()];
1152: my $output=1;
1153: if ($target eq 'no_output_web') {
1154: $target = 'web'; $output=0;
1155: }
1156: my $problem=&Apache::lonnet::getfile($file);
1157: my $result;
1158: if ($problem eq -1) {
1159: $problem='';
1160: my $filename=(split('/',$file))[-1];
1161: my $error =
1162: &mt('Unable to find [_1]',
1163: '<span class="LC_filename">'.$filename.'</span>');
1164: $result.=
1165: &Apache::loncommon::simple_error_page($request,'Not available',
1166: $error,{'no_auto_mt_msg' => 1});
1167: return;
1168: }
1169:
1170: my %mystyle;
1171: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
1172: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1173: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1174:
1175: &Apache::lonxml::debug("Should be parsing now");
1176: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
1177: &setup_vars($target),%mystyle);
1178: &finished_parsing();
1179: if (!$output) { $result = ''; }
1180: #$request->print("Result follows:");
1181: if ($target eq 'modified') {
1182: &handle_save_or_undo($request,\$problem,\$result);
1183: } else {
1184: if ($target eq 'analyze') {
1185: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
1186: undef(%Apache::lonhomework::analyze);
1187: }
1188: #my $td=&tv_interval($t0);
1189: #if ( $Apache::lonxml::debug) {
1190: #$result =~ s:</body>::;
1191: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1192: #}
1193: # $request->print($result);
1194: $overall_result.=$result;
1195: # $request->rflush();
1196: }
1197: #$request->print(":Result ends");
1198: #my $td=&tv_interval($t0);
1199: }
1200: if (!$return_string) {
1201: &Apache::lonxml::add_messages(\$overall_result);
1202: $request->print($overall_result);
1203: $request->rflush();
1204: } else {
1205: return $overall_result;
1206: }
1207: }
1208:
1209: sub finished_parsing {
1210: undef($Apache::lonhomework::parsing_a_problem);
1211: undef($Apache::lonhomework::parsing_a_task);
1212: }
1213:
1214: sub get_template_list {
1215: my ($extension) = @_;
1216: my $result;
1217: my @allnames;
1218: &Apache::lonxml::debug("Looking for :$extension:");
1219: my $glob_extension = $extension;
1220: if ($extension eq 'survey' || $extension eq 'exam') {
1221: $glob_extension = 'problem';
1222: }
1223: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1224: '/templates/*.'.$glob_extension);
1225: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1226: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1227: &Apache::lonnet::metadata($_, 'help')]} (@files);
1228: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1229: my ($midpoint,$seconddiv,$numfiles);
1230: my @noexamplelink = ('blank.problem','blank.library','script.library');
1231: $numfiles = 0;
1232: foreach my $file (@files) {
1233: next if ($file->[1] !~ /\S/);
1234: $numfiles ++;
1235: }
1236: if ($numfiles > 0) {
1237: $result = '<div class="LC_left_float">';
1238: $midpoint = int($numfiles/2);
1239: if ($numfiles%2) {
1240: $midpoint ++;
1241: }
1242: }
1243: my $count = 0;
1244: my $currentcategory='';
1245: my $first = 1;
1246: my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
1247: foreach my $file (@files) {
1248: next if ($file->[1] !~ /\S/);
1249: if ($file->[2] ne $currentcategory) {
1250: $currentcategory=$file->[2];
1251: if ((!$seconddiv) && ($count >= $midpoint)) {
1252: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1253: $seconddiv = 1;
1254: } elsif (!$first) {
1255: $result.='</div>'."\n";
1256: } else {
1257: $first = 0;
1258: }
1259: $result.= '<div class="LC_Box">'."\n"
1260: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1261: $count++;
1262: }
1263: $result .=
1264: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1265: $file->[1].'</label>';
1266: if ($file->[3]) {
1267: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1268: }
1269: # Provide example link
1270: my $filename=$file->[0];
1271: $filename=~s{^\Q$londocroot\E}{};
1272: if (!(grep($filename =~ /\Q$_\E$/,@noexamplelink))) {
1273: $result .= ' <span class="LC_fontsize_small">'
1274: .&Apache::loncommon::modal_link(
1275: $filename.'?inhibitmenu=yes',&mt('Example'),600,420,'sample')
1276: .'</span>';
1277: }
1278: $result .= '<br />'."\n";
1279: $count ++;
1280: }
1281: if ($numfiles > 0) {
1282: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1283: }
1284: return $result;
1285: }
1286:
1287: sub newproblem {
1288: my ($request) = @_;
1289:
1290: if ($env{'form.template'}) {
1291: my $file = $env{'form.template'};
1292: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1293: &File::Copy::copy($file,$dest);
1294: &renderpage($request,$dest);
1295: return;
1296: }
1297:
1298: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1299: &Apache::lonxml::debug("Looking for :$extension:");
1300: my $templatelist=&get_template_list($extension);
1301: if ($env{'form.newfile'} && !$templatelist) {
1302: # no templates found
1303: my $templatefilename =
1304: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1305: &Apache::lonxml::debug("$templatefilename");
1306: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1307: &File::Copy::copy($templatefilename,$dest);
1308: &renderpage($request,$dest);
1309: } else {
1310: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1311: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1312: my $errormsg;
1313: my $instructions;
1314: my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1315: 'text' => 'Authoring Space'},
1316: {'href' => '',
1317: 'text' => "Create New $extension"}];
1318: my $start_page =
1319: &Apache::loncommon::start_page("Create New $extension",
1320: undef,
1321: {'bread_crumbs' => $brcrum,});
1322: $request->print(
1323: $start_page
1324: .&Apache::loncommon::head_subbox(
1325: &Apache::loncommon::CSTR_pageheader())
1326: .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1327: $errormsg
1328: ".&mt("The requested file [_1] currently does not exist.",
1329: '<span class="LC_filename">'.$url.'</span>').'
1330: <p class="LC_info">
1331: '.&mt("To create a new $extension, select a template from the".
1332: " list below. Then click on the \"Create $extension\" button.").'
1333: </p><div><form action="'.$url.'" method="post">');
1334:
1335: if (defined($templatelist)) {
1336: $request->print($templatelist);
1337: }
1338: $request->print('<br /><input type="submit" name="newfile" value="'.
1339: &mt("Create $extension").'" />');
1340: $request->print('</form></div>'.&Apache::loncommon::end_page());
1341: }
1342: return;
1343: }
1344:
1345: sub update_construct_style {
1346: if ($env{'request.state'} eq "construct"
1347: && $env{'form.problemmode'} eq 'view'
1348: && defined($env{'form.submitted'})
1349: && !defined($env{'form.resetdata'})
1350: && !defined($env{'form.newrandomization'})) {
1351: if ((!$env{'form.style_file'} && $env{'construct.style'})
1352: ||$env{'form.clear_style_file'}) {
1353: &Apache::lonnet::delenv('construct.style');
1354: } elsif ($env{'form.style_file'}
1355: && $env{'construct.style'} ne $env{'form.style_file'}) {
1356: &Apache::lonnet::appenv({'construct.style' =>
1357: $env{'form.style_file'}});
1358: }
1359: }
1360: }
1361:
1362:
1363: sub handler {
1364: #my $t0 = [&gettimeofday()];
1365: my $request=$_[0];
1366: $Apache::lonxml::request=$request;
1367: $Apache::lonxml::debug=$env{'user.debug'};
1368: $env{'request.uri'}=$request->uri;
1369: &setuppermissions();
1370:
1371: my $file=&Apache::lonnet::filelocation("",$request->uri);
1372:
1373: #check if we know where we are
1374: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread('','',1,1)) {
1375: # if we are browsing we might not be able to know where we are
1376: if ($Apache::lonhomework::browse ne 'F' &&
1377: $env{'request.state'} ne "construct") {
1378: #should know where we are, so ask
1379: &unset_permissions();
1380: $request->internal_redirect('/adm/ambiguous');
1381: return OK;
1382: }
1383: }
1384: if (&setupheader($request)) {
1385: &unset_permissions();
1386: return OK;
1387: }
1388: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1389: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1390: my ($symb) = &Apache::lonnet::whichuser();
1391: &Apache::lonxml::debug('symb is '.$symb);
1392: if ($env{'request.state'} eq "construct") {
1393: if ( -e $file ) {
1394: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1395: ['problemmode']);
1396: if (!(defined $env{'form.problemmode'})) {
1397: #first visit to problem in construction space
1398: $env{'form.problemmode'}= 'view';
1399: &renderpage($request,$file);
1400: } elsif (($env{'form.problemmode'} eq 'editxml') ||
1401: ($env{'form.problemmode'} eq 'saveeditxml') ||
1402: ($env{'form.problemmode'} eq 'saveviewxml') ||
1403: ($env{'form.problemmode'} eq 'undoxml')) {
1404: &editxmlmode($request,$file);
1405: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1406: &analyze($request,$file);
1407: } else {
1408: &update_construct_style();
1409: &renderpage($request,$file);
1410: }
1411: } else {
1412: # requested file doesn't exist in contruction space
1413: &newproblem($request);
1414: }
1415: } else {
1416: # just render the page normally outside of construction space
1417: &Apache::lonxml::debug("not construct");
1418: &renderpage($request,$file);
1419: }
1420: #my $td=&tv_interval($t0);
1421: #&Apache::lonxml::debug("Spent $td seconds processing");
1422: # always turn off debug messages
1423: $Apache::lonxml::debug=0;
1424: &unset_permissions();
1425: return OK;
1426:
1427: }
1428:
1429: 1;
1430: __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