1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.276 2007/10/08 09:22:50 foxr Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27:
28:
29: package Apache::lonhomework;
30: use strict;
31: use Apache::style();
32: use Apache::lonxml();
33: use Apache::lonnet;
34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
47: use Apache::rankresponse();
48: use Apache::matchresponse();
49: use Apache::chemresponse();
50: use Apache::drawimage();
51: use Apache::Constants qw(:common);
52: use HTML::Entities();
53: use Apache::loncommon();
54: use Apache::lonlocal;
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Apache::lonnet();
57:
58: # FIXME - improve commenting
59:
60:
61: BEGIN {
62: &Apache::lonxml::register_insert();
63: }
64:
65:
66: =pod
67:
68: =item set_bubble_lines()
69:
70: Called at analysis time to set the bubble lines
71: hash for the problem.. This should be called in the
72: end_problemtype tag in analysis mode.
73:
74: We fetch the hash of part id counters from lonxml
75: and push them into analyze:{part_id.bubble_lines}.
76:
77: =cut
78:
79: sub set_bubble_lines {
80: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
81:
82: foreach my $key (keys(%bubble_counters)) {
83: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
84: $bubble_counters{"$key"};
85: }
86: }
87:
88: #
89: # Decides what targets to render for.
90: # Implicit inputs:
91: # Various session environment variables:
92: # request.state - published - is a /res/ resource
93: # uploaded - is a /uploaded/ resource
94: # contruct - is a /priv/ resource
95: # form.grade_target - a form parameter requesting a specific target
96: sub get_target {
97: &Apache::lonxml::debug("request.state = $env{'request.state'}");
98: if( defined($env{'form.grade_target'})) {
99: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
100: } else {
101: &Apache::lonxml::debug("form.grade_target <undefined>");
102: }
103: if (($env{'request.state'} eq "published") ||
104: ($env{'request.state'} eq "uploaded")) {
105: if ( defined($env{'form.grade_target'} )
106: && ($env{'form.grade_target'} eq 'tex')) {
107: return ($env{'form.grade_target'});
108: } elsif ( defined($env{'form.grade_target'} )
109: && ($Apache::lonhomework::viewgrades eq 'F' )) {
110: return ($env{'form.grade_target'});
111: } elsif ( $env{'form.grade_target'} eq 'webgrade'
112: && ($Apache::lonhomework::queuegrade eq 'F' )) {
113: return ($env{'form.grade_target'});
114: }
115: if ($env{'form.webgrade'} &&
116: ($Apache::lonhomework::modifygrades eq 'F'
117: || $Apache::lonhomework::queuegrade eq 'F' )) {
118: return ('grade','webgrade');
119: }
120: if ( defined($env{'form.submitted'}) &&
121: ( !defined($env{'form.newrandomization'}))) {
122: return ('grade', 'web');
123: } else {
124: return ('web');
125: }
126: } elsif ($env{'request.state'} eq "construct") {
127: if ( defined($env{'form.grade_target'}) ) {
128: return ($env{'form.grade_target'});
129: }
130: if ( defined($env{'form.preview'})) {
131: if ( defined($env{'form.submitted'})) {
132: return ('grade', 'web');
133: } else {
134: return ('web');
135: }
136: } else {
137: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
138: #$env{'form.webgrade'} = 'yes';
139: return ('grade','webgrade','answer');
140: } elsif ( $env{'form.problemmode'} eq &mt('View') ||
141: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
142: if ( defined($env{'form.submitted'}) &&
143: (!defined($env{'form.resetdata'})) &&
144: (!defined($env{'form.newrandomization'}))) {
145: return ('grade', 'web','answer');
146: } else {
147: return ('web','answer');
148: }
149: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
150: $env{'form.problemmode'} eq 'Edit') {
151: if ( $env{'form.submitted'} eq 'edit' ) {
152: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
153: return ('modified','web','answer');
154: } else {
155: return ('modified','no_output_web','edit');
156: }
157: } else {
158: return ('no_output_web','edit');
159: }
160: } else {
161: return ('web');
162: }
163: }
164: }
165: return ();
166: }
167:
168: sub setup_vars {
169: my ($target) = @_;
170: return ';'
171: # return ';$external::target='.$target.';';
172: }
173:
174: sub createmenu {
175: my ($which,$request)=@_;
176: if ($which eq 'grade') {
177: $request->print('<script language="JavaScript">
178: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
179: "height=350,width=150,menubar=no");
180: </script>');
181: }
182: }
183:
184: sub proctor_checked_in {
185: my ($slot_name,$slot,$type)=@_;
186: my @possible_proctors=split(",",$slot->{'proctor'});
187:
188: return 1 if (!@possible_proctors);
189:
190: my $key;
191: if ($type eq 'Task') {
192: my $version=$Apache::lonhomework::history{'resource.0.version'};
193: $key ="resource.$version.0.checkedin";
194: } elsif ($type eq 'problem') {
195: $key ='resource.0.checkedin';
196: }
197: # backward compatability, used to be username@domain,
198: # now is username:domain
199: my $who = $Apache::lonhomework::history{$key};
200: if ($who !~ /:/) {
201: $who =~ tr/@/:/;
202: }
203: foreach my $possible (@possible_proctors) {
204: if ($who eq $possible
205: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
206: return 1;
207: }
208: }
209:
210: return 0;
211: }
212:
213: sub check_ip_acc {
214: my ($acc)=@_;
215: &Apache::lonxml::debug("acc is $acc");
216: if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
217: return 1;
218: }
219: my $allowed=0;
220: my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'};
221:
222: my $name;
223: foreach my $pattern (split(',',$acc)) {
224: $pattern =~ s/^\s*//;
225: $pattern =~ s/\s*$//;
226: if ($pattern =~ /\*$/) {
227: #35.8.*
228: $pattern=~s/\*//;
229: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
230: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
231: #35.8.3.[34-56]
232: my $low=$2;
233: my $high=$3;
234: $pattern=$1;
235: if ($ip =~ /^\Q$pattern\E/) {
236: my $last=(split(/\./,$ip))[3];
237: if ($last <=$high && $last >=$low) { $allowed=1; }
238: }
239: } elsif ($pattern =~ /^\*/) {
240: #*.msu.edu
241: $pattern=~s/\*//;
242: if (!defined($name)) {
243: use Socket;
244: my $netaddr=inet_aton($ip);
245: ($name)=gethostbyaddr($netaddr,AF_INET);
246: }
247: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
248: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
249: #127.0.0.1
250: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
251: } else {
252: #some.name.com
253: if (!defined($name)) {
254: use Socket;
255: my $netaddr=inet_aton($ip);
256: ($name)=gethostbyaddr($netaddr,AF_INET);
257: }
258: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
259: }
260: if ($allowed) { last; }
261: }
262: return $allowed;
263: }
264:
265: sub check_slot_access {
266: my ($id,$type)=@_;
267:
268: # does it pass normal muster
269: my ($status,$datemsg)=&check_access($id);
270:
271: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
272: if ($useslots ne 'resource' && $useslots ne 'map'
273: && $useslots ne 'map_map') {
274: return ($status,$datemsg);
275: }
276:
277: if ($status eq 'SHOW_ANSWER' ||
278: $status eq 'CLOSED' ||
279: $status eq 'INVALID_ACCESS' ||
280: $status eq 'UNAVAILABLE') {
281: return ($status,$datemsg);
282: }
283: if ($env{'request.state'} eq "construct") {
284: return ($status,$datemsg);
285: }
286:
287: if ($type eq 'Task') {
288: my $version=$Apache::lonhomework::history{'resource.version'};
289: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
290: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
291: return ('SHOW_ANSWER');
292: }
293: }
294:
295: my @slots=
296: (split(':',&Apache::lonnet::EXT("resource.0.availablestudent")),
297: split(':',&Apache::lonnet::EXT("resource.0.available")));
298:
299: # if (!@slots) {
300: # return ($status,$datemsg);
301: # }
302: my $slotstatus='NOT_IN_A_SLOT';
303: my ($returned_slot,$slot_name);
304: foreach my $slot (@slots) {
305: $slot =~ s/(^\s*|\s*$)//g;
306: &Apache::lonxml::debug("getting $slot");
307: my %slot=&Apache::lonnet::get_slot($slot);
308: &Apache::lonhomework::showhash(%slot);
309: if ($slot{'starttime'} < time &&
310: $slot{'endtime'} > time &&
311: &check_ip_acc($slot{'ip'})) {
312: &Apache::lonxml::debug("$slot is good");
313: $slotstatus='NEEDS_CHECKIN';
314: $returned_slot=\%slot;
315: $slot_name=$slot;
316: last;
317: }
318: }
319: if ($slotstatus eq 'NEEDS_CHECKIN' &&
320: &proctor_checked_in($slot_name,$returned_slot,$type)) {
321: &Apache::lonxml::debug("protoctor checked in");
322: $slotstatus='CAN_ANSWER';
323: }
324:
325: my ($is_correct,$got_grade,$checkedin);
326: if ($type eq 'Task') {
327: my $version=$Apache::lonhomework::history{'resource.0.version'};
328: $got_grade =
329: ($Apache::lonhomework::history{"resource.$version.0.status"}
330: =~ /^(?:pass|fail)$/);
331: $is_correct =
332: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
333: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
334: $checkedin =
335: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
336: } elsif ($type eq 'problem') {
337: $got_grade = 1;
338: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
339: $is_correct =
340: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
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: # no slot is currently open, and has been checked in for this version
354: # previous slot is therefore CLOSED, so therefore the problem is
355: if (!defined($slot_name)
356: && $checkedin
357: && $type eq 'problem') {
358: return ('CLOSED',$datemsg);
359: }
360:
361: if ($slotstatus eq 'NOT_IN_A_SLOT'
362: && $checkedin ) {
363:
364: if ($got_grade) {
365: return ('SHOW_ANSWER');
366: } else {
367: return ('WAITING_FOR_GRADE');
368: }
369:
370: }
371:
372: if ( $is_correct) {
373: if ($type eq 'problem') {
374: return ($status);
375: }
376: return ('SHOW_ANSWER');
377: }
378:
379: if ( $status eq 'CANNOT_ANSWER' &&
380: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
381: return ($status,$datemsg);
382: }
383:
384: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
385: }
386:
387: # JB, 9/24/2002: Any changes in this function may require a change
388: # in lonnavmaps::resource::getDateStatus.
389: sub check_access {
390: my ($id) = @_;
391: my $date ='';
392: my $status;
393: my $datemsg = '';
394: my $lastdate = '';
395: my $type;
396: my $passed;
397:
398: if ($env{'request.state'} eq "construct") {
399: if ($env{'form.problemstate'}) {
400: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
401: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
402: lc($Apache::lonhomework::problemstatus) eq 'no')) {
403: return ('CANNOT_ANSWER',
404: &mt('is in this state due to author settings.'));
405: }
406: } else {
407: return ($env{'form.problemstate'},
408: &mt('is in this state due to author settings.'));
409: }
410: }
411: &Apache::lonxml::debug("in construction ignoring dates");
412: $status='CAN_ANSWER';
413: $datemsg=&mt('is in under construction');
414: # return ($status,$datemsg);
415: }
416:
417: &Apache::lonxml::debug("checking for part :$id:");
418: &Apache::lonxml::debug("time:".time);
419:
420: my ($symb)=&Apache::lonnet::whichuser();
421: &Apache::lonxml::debug("symb:".$symb);
422: #if ($env{'request.state'} ne "construct" && $symb ne '') {
423: if ($env{'request.state'} ne "construct") {
424: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
425: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
426: $status='INVALID_ACCESS';
427: $date=&mt("can not be accessed from your location.");
428: return($status,$date);
429: }
430:
431: foreach my $temp ("opendate","duedate","answerdate") {
432: $lastdate = $date;
433: if ($temp eq 'duedate') {
434: $date = &due_date($id);
435: } else {
436: $date = &Apache::lonnet::EXT("resource.$id.$temp");
437: }
438:
439: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
440: if ($thistype =~ /^(con_lost|no_such_host)/ ||
441: $date =~ /^(con_lost|no_such_host)/) {
442: $status='UNAVAILABLE';
443: $date=&mt("may open later.");
444: return($status,$date);
445: }
446: if ($thistype eq 'date_interval') {
447: if ($temp eq 'opendate') {
448: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
449: }
450: if ($temp eq 'answerdate') {
451: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
452: }
453: }
454: &Apache::lonxml::debug("found :$date: for :$temp:");
455: if ($date eq '') {
456: $date = &mt("an unknown date"); $passed = 0;
457: } elsif ($date eq 'con_lost') {
458: $date = &mt("an indeterminate date"); $passed = 0;
459: } else {
460: if (time < $date) { $passed = 0; } else { $passed = 1; }
461: $date = &Apache::lonlocal::locallocaltime($date);
462: }
463: if (!$passed) { $type=$temp; last; }
464: }
465: &Apache::lonxml::debug("have :$type:$passed:");
466: if ($passed) {
467: $status='SHOW_ANSWER';
468: $datemsg=$date;
469: } elsif ($type eq 'opendate') {
470: $status='CLOSED';
471: $datemsg = &mt("will open on")." $date";
472: } elsif ($type eq 'duedate') {
473: $status='CAN_ANSWER';
474: $datemsg = &mt("is due at")." $date";
475: } elsif ($type eq 'answerdate') {
476: $status='CLOSED';
477: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
478: }
479: }
480: if ($status eq 'CAN_ANSWER' ||
481: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
482: #check #tries, and if correct.
483: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
484: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
485: if ( $tries eq '' ) { $tries = '0'; }
486: if ( $maxtries eq '' &&
487: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
488: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
489: # if (correct and show prob status) or excused then CANNOT_ANSWER
490: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
491: &&
492: lc($Apache::lonhomework::problemstatus) ne 'no')
493: ||
494: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
495: $status = 'CANNOT_ANSWER';
496: }
497: }
498: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
499: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
500: &Apache::lonxml::debug("looking for interval $interval");
501: if ($interval) {
502: my $first_access=&Apache::lonnet::get_first_access('map');
503: &Apache::lonxml::debug("looking for accesstime $first_access");
504: if (!$first_access) {
505: $status='NOT_YET_VIEWED';
506: my $due_date = &due_date($id);
507: my $seconds_left = $due_date - time;
508: if ($seconds_left > $interval || $due_date eq '') {
509: $seconds_left = $interval;
510: }
511: $datemsg=&seconds_to_human_length($seconds_left);
512: }
513: }
514: }
515:
516: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
517: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
518: # return ('UNCHECKEDOUT','needs to be checked out');
519: #}
520:
521:
522: &Apache::lonxml::debug("sending back :$status:$datemsg:");
523: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
524: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
525: $status='CAN_ANSWER';
526: $datemsg=&mt('is closed but you are allowed to view it');
527: }
528:
529: return ($status,$datemsg);
530: }
531: # this should work exactly like the copy in lonnavmaps.pm
532: sub due_date {
533: my ($part_id,$symb,$udom,$uname)=@_;
534: my $date;
535: my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
536: $udom,$uname);
537: &Apache::lonxml::debug("looking for interval $part_id $symb $interval");
538: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
539: $udom,$uname);
540: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
541: if ($interval =~ /\d+/) {
542: my $first_access=&Apache::lonnet::get_first_access('map',$symb);
543: &Apache::lonxml::debug("looking for first_access $first_access");
544: if (defined($first_access)) {
545: $interval = $first_access+$interval;
546: $date = ($interval < $due_date)? $interval : $due_date;
547: } else {
548: $date = $due_date;
549: }
550: } else {
551: $date = $due_date;
552: }
553: return $date
554: }
555:
556: sub seconds_to_human_length {
557: my ($length)=@_;
558:
559: my $seconds=$length%60; $length=int($length/60);
560: my $minutes=$length%60; $length=int($length/60);
561: my $hours=$length%24; $length=int($length/24);
562: my $days=$length;
563:
564: my $timestr;
565: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
566: if ($hours > 0) { $timestr.=($timestr?", ":"").
567: &mt('[quant,_1,hour]',$hours); }
568: if ($minutes > 0) { $timestr.=($timestr?", ":"").
569: &mt('[quant,_1,minute]',$minutes); }
570: if ($seconds > 0) { $timestr.=($timestr?", ":"").
571: &mt('[quant,_1,second]',$seconds); }
572: return $timestr;
573: }
574:
575: sub showhash {
576: my (%hash) = @_;
577: &showhashsubset(\%hash,'.');
578: return '';
579: }
580:
581: sub showarray {
582: my ($array)=@_;
583: my $string="(";
584: foreach my $elm (@{ $array }) {
585: if (ref($elm) eq 'ARRAY') {
586: $string.=&showarray($elm);
587: } elsif (ref($elm) eq 'HASH') {
588: $string.= "HASH --- \n<br />";
589: $string.= &showhashsubset($elm,'.');
590: } else {
591: $string.="$elm,"
592: }
593: }
594: chop($string);
595: $string.=")";
596: return $string;
597: }
598:
599: sub showhashsubset {
600: my ($hash,$keyre) = @_;
601: my $resultkey;
602: foreach $resultkey (sort keys %$hash) {
603: if ($resultkey !~ /$keyre/) { next; }
604: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
605: &Apache::lonxml::debug("$resultkey ---- ".
606: &showarray($$hash{$resultkey}));
607: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
608: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
609: &showhashsubset($$hash{$resultkey},'.');
610: } else {
611: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
612: }
613: }
614: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
615: return '';
616: }
617:
618: sub setuppermissions {
619: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
620: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
621: if (! $viewgrades &&
622: exists($env{'request.course.sec'}) &&
623: $env{'request.course.sec'} !~ /^\s*$/) {
624: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
625: '/'.$env{'request.course.sec'});
626: }
627: $Apache::lonhomework::viewgrades = $viewgrades;
628:
629: if ($Apache::lonhomework::browse eq 'F' &&
630: $env{'form.devalidatecourseresdata'} eq 'on') {
631: my (undef,$courseid) = &Apache::lonnet::whichuser();
632: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
633: $env{"course.$courseid.domain"});
634: }
635:
636: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
637: if (! $modifygrades &&
638: exists($env{'request.course.sec'}) &&
639: $env{'request.course.sec'} !~ /^\s*$/) {
640: $modifygrades =
641: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
642: '/'.$env{'request.course.sec'});
643: }
644: $Apache::lonhomework::modifygrades = $modifygrades;
645:
646: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
647: if (! $queuegrade &&
648: exists($env{'request.course.sec'}) &&
649: $env{'request.course.sec'} !~ /^\s*$/) {
650: $queuegrade =
651: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
652: '/'.$env{'request.course.sec'});
653: }
654: $Apache::lonhomework::queuegrade = $queuegrade;
655: return '';
656: }
657:
658: sub unset_permissions {
659: undef($Apache::lonhomework::queuegrade);
660: undef($Apache::lonhomework::modifygrades);
661: undef($Apache::lonhomework::viewgrades);
662: undef($Apache::lonhomework::browse);
663: }
664:
665: sub setupheader {
666: my $request=$_[0];
667: &Apache::loncommon::content_type($request,'text/html');
668: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
669: &Apache::loncommon::no_cache($request);
670: }
671: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
672: # 'lastrevisiondate'));
673: $request->send_http_header;
674: return OK if $request->header_only;
675: return ''
676: }
677:
678: sub handle_save_or_undo {
679: my ($request,$problem,$result) = @_;
680: my $file = &Apache::lonnet::filelocation("",$request->uri);
681: my $filebak =$file.".bak";
682: my $filetmp =$file.".tmp";
683: my $error=0;
684: if ($env{'form.Undo'} eq &mt('undo')) {
685: my $error=0;
686: if (!copy($file,$filetmp)) { $error=1; }
687: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
688: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
689: if (!$error) {
690: &Apache::lonxml::info("<p><b>".
691: &mt("Undid changes, Switched [_1] and [_2]",
692: '<span class="LC_filename">'.$filebak.
693: '</span>',
694: '<span class="LC_filename">'.$file.
695: '</span>')."</b></p>");
696: } else {
697: &Apache::lonxml::info("<p><span class=\"LC_error\">".
698: &mt("Unable to undo, unable to switch [_1] and [_2]",
699: '<span class="LC_filename">'.
700: $filebak.'</span>',
701: '<span class="LC_filename">'.
702: $file.'</span>')."</span></p>");
703: $error=1;
704: }
705: } else {
706: &Apache::lonnet::correct_line_ends($result);
707: my $fs=Apache::File->new(">$filebak");
708: if (defined($fs)) {
709: print $fs $$problem;
710: &Apache::lonxml::info("<b>".&mt("Making Backup to [_1]",
711: '<span class="LC_filename">'.
712: $filebak.'</span>').
713: "</b>");
714: } else {
715: &Apache::lonxml::info("<span class=\"LC_error\">".
716: &mt("Unable to make backup [_1]",
717: '<span class="LC_filename">'.
718: $filebak.'</span>')."</span>");
719: $error=2;
720: }
721: my $fh=Apache::File->new(">$file");
722: if (defined($fh)) {
723: print $fh $$result;
724: &Apache::lonxml::info("<b>".&mt("Saving Modifications to [_1]",
725: '<span class="LC_filename">'.
726: $file.'</span>' )."</b>");
727: } else {
728: &Apache::lonxml::info('<span class="LC_error">'.
729: &mt("Unable to write to [_1]",
730: '<span class="LC_filename">'.
731: $file.'</span>').
732: '</span>');
733: $error|=4;
734: }
735: }
736: return $error;
737: }
738:
739: sub analyze_header {
740: my ($request) = @_;
741: my $result =
742: &Apache::loncommon::start_page('Analyzing a problem',undef);
743:
744: $result .=
745: &Apache::lonxml::message_location().'
746: <form name="lonhomework" method="POST" action="'.
747: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
748: &Apache::structuretags::remember_problem_state().'
749: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
750: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
751: <hr />
752: <input type="submit" name="submit" value="'.&mt("View").'" />
753: <hr />
754: </form>';
755: &Apache::lonxml::add_messages(\$result);
756: $request->print($result);
757: $request->rflush();
758: }
759:
760: sub analyze_footer {
761: my ($request) = @_;
762: $request->print(&Apache::loncommon::end_page());
763: $request->rflush();
764: }
765:
766: sub analyze {
767: my ($request,$file) = @_;
768: &Apache::lonxml::debug("Analyze");
769: my $result;
770: my %overall;
771: my %seedexample;
772: my %allparts;
773: my $rndseed=$env{'form.rndseed'};
774: &analyze_header($request);
775: my %prog_state=
776: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
777: &mt('Getting Problem Variants'),
778: $env{'form.numtoanalyze'},
779: 'inline',undef);
780: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
781: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
782: &mt('last problem'));
783: if (&Apache::loncommon::connection_aborted($request)) { return; }
784: my $thisseed=$i+$rndseed;
785: my $subresult=&Apache::lonnet::ssi($request->uri,
786: ('grade_target' => 'analyze'),
787: ('rndseed' => $thisseed));
788: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
789: my %analyze=&Apache::lonnet::str2hash($subresult);
790: my @parts;
791: if (defined(@{ $analyze{'parts'} })) {
792: @parts=@{ $analyze{'parts'} };
793: }
794: foreach my $part (@parts) {
795: if (!exists($allparts{$part})) {$allparts{$part}=1;};
796: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
797: $analyze{$part.'.type'} eq 'stringresponse' ||
798: $analyze{$part.'.type'} eq 'formularesponse' ) {
799: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
800: my $i=0;
801: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
802: push( @{ $overall{$part.'.answer'}[$i] },
803: $answer_part);
804: my $concatanswer= join("\0",@{ $answer_part });
805: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
806: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
807: }
808: $seedexample{join("\0",$part,$i,@{$answer_part})}=
809: $thisseed;
810: $i++;
811: }
812: }
813: if (!keys(%{ $analyze{$part.'.answer'} })) {
814: my $answer_part =
815: ['<span class="LC_error">'.&mt('Error').'</span>'];
816: $seedexample{join("\0",$part,0,@{$answer_part})}=
817: $thisseed;
818: push( @{ $overall{$part.'.answer'}[0] },
819: $answer_part);
820: }
821: }
822: }
823: }
824: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
825: &mt('Analyzing Results'));
826: $request->print('<hr />'.&mt('List of possible answers').': ');
827: foreach my $part (sort(keys(%allparts))) {
828: if (defined(@{ $overall{$part.'.answer'} })) {
829: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
830: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
831: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part);
832: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
833: $request->print(&mt(' Answer [_1]',$i+1));
834: }
835: $request->print('</th></tr>');
836: my %frequency;
837: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
838: $frequency{join("\0",@{ $answer })}++;
839: }
840: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
841: .&mt('click for example').')</th></tr>');
842: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
843: $request->print('<tr><td class="center">'.
844: join('</td><td class="center">',split("\0",$answer)).
845: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.
846: '</a></td></tr>');
847: }
848: $request->print('</table>');
849: }
850: } else {
851: $request->print('<p>'.&mt('Response').' '.$part.' '.
852: &mt('is not analyzable at this time').'</p>');
853: }
854: }
855: if (scalar(keys(%allparts)) == 0 ) {
856: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
857: }
858: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
859: &analyze_footer($request);
860: &Apache::lonhomework::showhash(%overall);
861: return $result;
862: }
863:
864: sub editxmlmode {
865: my ($request,$file) = @_;
866: my $result;
867: my $problem=&Apache::lonnet::getfile($file);
868: if ($problem eq -1) {
869: &Apache::lonxml::error("<b> ".&mt('Unable to find').
870: " <i>$file</i></b>");
871: $problem='';
872: }
873: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
874: my $error=&handle_save_or_undo($request,\$problem,
875: \$env{'form.editxmltext'});
876: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
877: }
878: &Apache::lonhomework::showhashsubset(\%env,'^form');
879: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
880: &Apache::lonhomework::showhashsubset(\%env,'^form');
881: $env{'form.problemmode'}='View';
882: &renderpage($request,$file);
883: } else {
884: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
885: my $xml_help = '<table><tr><td>'.
886: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
887: "Problem Editing Help").
888: '</td><td>'.
889: &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
890: '</td></tr></table>';
891: if ($cols > 80) { $cols = 80; }
892: if ($cols < 70) { $cols = 70; }
893: if ($rows < 20) { $rows = 20; }
894: my $js =
895: &Apache::edit::js_change_detection().
896: &Apache::loncommon::resize_textarea_js();
897: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
898: my $start_page =
899: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
900: {'no_auto_mt_title' => 1,
901: 'only_body' => $only_body,
902: 'add_entries' => {
903: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
904: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
905: }});
906:
907: $result.=$start_page.
908: &renderpage($request,$file,['no_output_web'],1).
909: &Apache::lonxml::message_location().'
910: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
911: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
912: &Apache::structuretags::remember_problem_state().'
913: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
914: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
915: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
916: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
917: <hr />
918: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
919: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
920: <hr />
921: ' . $xml_help . '
922: <textarea '.&Apache::edit::element_change_detection().
923: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
924: ' name="editxmltext" id="LC_editxmltext">'.
925: &HTML::Entities::encode($problem,'<>&"').'</textarea>
926: <div id="LC_aftertextarea">
927: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
928: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
929: </div>
930: </form>'.&Apache::loncommon::end_page();
931: &Apache::lonxml::add_messages(\$result);
932: $request->print($result);
933: }
934: return '';
935: }
936:
937: #
938: # Render the page in whatever target desired.
939: #
940: sub renderpage {
941: my ($request,$file,$targets,$return_string) = @_;
942:
943: my @targets = @{$targets || [&get_target()]};
944: &Apache::lonhomework::showhashsubset(\%env,'form.');
945: &Apache::lonxml::debug("Running targets ".join(':',@targets));
946:
947: my $overall_result;
948: foreach my $target (@targets) {
949: # FIXME need to do something intelligent when a problem goes
950: # from viewable to not viewable due to map conditions
951: #&setuppermissions();
952: #if ( $Apache::lonhomework::browse ne '2'
953: # && $Apache::lonhomework::browse ne 'F' ) {
954: # $request->print(" You most likely shouldn't see me.");
955: #}
956: #my $t0 = [&gettimeofday()];
957: my $output=1;
958: if ($target eq 'no_output_web') {
959: $target = 'web'; $output=0;
960: }
961: my $problem=&Apache::lonnet::getfile($file);
962: my $result;
963: if ($problem eq -1) {
964: $problem='';
965: my $filename=(split('/',$file))[-1];
966: my $error =
967: "<b> ".&mt('Unable to find [_1]',
968: ' <span class="LC_filename">'.$filename.'</span>')
969: ."</b>";
970: $result.=
971: &Apache::loncommon::simple_error_page($request,'Not available',
972: $error);
973: return;
974: }
975:
976: my %mystyle;
977: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
978: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
979: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
980:
981: &Apache::lonxml::debug("Should be parsing now");
982: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
983: &setup_vars($target),%mystyle);
984: &finished_parsing();
985: if (!$output) { $result = ''; }
986: #$request->print("Result follows:");
987: if ($target eq 'modified') {
988: &handle_save_or_undo($request,\$problem,\$result);
989: } else {
990: if ($target eq 'analyze') {
991: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
992: undef(%Apache::lonhomework::analyze);
993: }
994: #my $td=&tv_interval($t0);
995: #if ( $Apache::lonxml::debug) {
996: #$result =~ s:</body>::;
997: #$result.="<br />Spent $td seconds processing target $target\n</body>";
998: #}
999: # $request->print($result);
1000: $overall_result.=$result;
1001: # $request->rflush();
1002: }
1003: #$request->print(":Result ends");
1004: #my $td=&tv_interval($t0);
1005: }
1006: if (!$return_string) {
1007: &Apache::lonxml::add_messages(\$overall_result);
1008: $request->print($overall_result);
1009: $request->rflush();
1010: } else {
1011: return $overall_result;
1012: }
1013: }
1014:
1015: sub finished_parsing {
1016: undef($Apache::lonhomework::parsing_a_problem);
1017: undef($Apache::lonhomework::parsing_a_task);
1018: }
1019:
1020: # with no arg it returns a HTML <option> list of the template titles
1021: # with one arg it returns the filename associated with the arg passed
1022: sub get_template_list {
1023: my ($namewanted,$extension) = @_;
1024: my $result;
1025: my @allnames;
1026: &Apache::lonxml::debug("Looking for :$extension:");
1027: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
1028: &Apache::lonxml::debug("Looking at $file");
1029: my $name=&Apache::lonnet::metadata($file,'title');
1030: &Apache::lonxml::debug("Got a name $name");
1031: if ($namewanted && ($name eq $namewanted)) {
1032: $result=$file;
1033: last;
1034: } else {
1035: if ($name) { push (@allnames, $name); }
1036: }
1037: }
1038: if (@allnames && !$result) {
1039: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1040: join('</option><option>',sort(@allnames)).'</option>';
1041: }
1042: return $result;
1043: }
1044:
1045: sub newproblem {
1046: my ($request) = @_;
1047: my $extension=$request->uri;
1048: $extension=~s:^.*\.([\w]+)$:$1:;
1049: &Apache::lonxml::debug("Looking for :$extension:");
1050: my $templatelist=&get_template_list('',$extension);
1051: if ($env{'form.template'} &&
1052: $env{'form.template'} ne "Select a $extension template") {
1053: use File::Copy;
1054: my $file = &get_template_list($env{'form.template'},$extension);
1055: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1056: copy($file,$dest);
1057: &renderpage($request,$dest);
1058: } elsif($env{'form.newfile'} && !$templatelist) {
1059: # I don't like hard-coded filenames but for now, this will work.
1060: use File::Copy;
1061: my $templatefilename =
1062: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1063: &Apache::lonxml::debug("$templatefilename");
1064: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1065: copy($templatefilename,$dest);
1066: &renderpage($request,$dest);
1067: } else {
1068: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1069: my $shownurl=$url;
1070: $shownurl=~s-^/~-/priv/-;
1071: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1072: my $errormsg;
1073: if ($env{'form.newfile'}) {
1074: $errormsg='<p><span class="LC_error">'.&mt('You did not select a template.').'</span></p>'."\n";
1075: }
1076: my $instructions;
1077: my $start_page =
1078: &Apache::loncommon::start_page("Create New $extension");
1079: $request->print("
1080: $start_page
1081: <h1>".&mt("Creating a new $extension resource.")."</h1>
1082: $errormsg
1083: ".&mt("The requested file [_1] currently does not exist.",
1084: "<tt>$shownurl</tt>")."
1085: <p>
1086: <b>
1087: ".&mt("To create a new $extension, select a template from the".
1088: "pull-down menu below. Then click on the \"Create $extension\" button.")."</b>
1089: </p><form action=\"$url\" method=\"POST\">");
1090:
1091: if (defined($templatelist)) {
1092: $request->print("<select name=\"template\">$templatelist</select>");
1093: }
1094: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1095: $request->print("</form></p>".&Apache::loncommon::end_page());
1096: }
1097: return '';
1098: }
1099:
1100: sub update_construct_style {
1101: if ($env{'request.state'} eq "construct"
1102: && $env{'form.problemmode'} eq &mt('View')
1103: && defined($env{'form.submitted'})
1104: && !defined($env{'form.resetdata'})
1105: && !defined($env{'form.newrandomization'})) {
1106: if ((!$env{'form.style_file'} && $env{'construct.style'})
1107: ||$env{'form.clear_style_file'}) {
1108: &Apache::lonnet::delenv('construct\\.style');
1109: } elsif ($env{'form.style_file'}
1110: && $env{'construct.style'} ne $env{'form.style_file'}) {
1111: &Apache::lonnet::appenv('construct.style' =>
1112: $env{'form.style_file'});
1113: }
1114: }
1115: }
1116:
1117:
1118: sub handler {
1119: #my $t0 = [&gettimeofday()];
1120: my $request=$_[0];
1121: $Apache::lonxml::request=$request;
1122: $Apache::lonxml::debug=$env{'user.debug'};
1123: $env{'request.uri'}=$request->uri;
1124: &setuppermissions();
1125: # some times multiple problemmodes are submitted, need to select
1126: # the last one
1127: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
1128: my $mode=$env{'form.problemmode'}->[-1];
1129: undef $env{'form.problemmode'};
1130: $env{'form.problemmode'}=$mode;
1131: }
1132:
1133: my $file=&Apache::lonnet::filelocation("",$request->uri);
1134:
1135: #check if we know where we are
1136: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1137: # if we are browsing we might not be able to know where we are
1138: if ($Apache::lonhomework::browse ne 'F' &&
1139: $env{'request.state'} ne "construct") {
1140: #should know where we are, so ask
1141: &unset_permissions();
1142: $request->internal_redirect('/adm/ambiguous');
1143: return OK;
1144: }
1145: }
1146: if (&setupheader($request)) {
1147: &unset_permissions();
1148: return OK;
1149: }
1150: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1151: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1152: my ($symb) = &Apache::lonnet::whichuser();
1153: &Apache::lonxml::debug('symb is '.$symb);
1154: if ($env{'request.state'} eq "construct") {
1155: if ( -e $file ) {
1156: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1157: ['problemmode']);
1158: if (!(defined $env{'form.problemmode'})) {
1159: #first visit to problem in construction space
1160: $env{'form.problemmode'}='View';
1161: &renderpage($request,$file);
1162: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
1163: $env{'form.problemmode'} eq 'EditXML') {
1164: &editxmlmode($request,$file);
1165: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1166: &analyze($request,$file);
1167: } else {
1168: &update_construct_style();
1169: &renderpage($request,$file);
1170: }
1171: } else {
1172: # requested file doesn't exist in contruction space
1173: &newproblem($request);
1174: }
1175: } else {
1176: # just render the page normally outside of construction space
1177: &Apache::lonxml::debug("not construct");
1178: &renderpage($request,$file);
1179: }
1180: #my $td=&tv_interval($t0);
1181: #&Apache::lonxml::debug("Spent $td seconds processing");
1182: # always turn off debug messages
1183: $Apache::lonxml::debug=0;
1184: &unset_permissions();
1185: return OK;
1186:
1187: }
1188:
1189: 1;
1190: __END__
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