1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.271 2007/08/24 21:13:53 albertel 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: #
67: # Decides what targets to render for.
68: # Implicit inputs:
69: # Various session environment variables:
70: # request.state - published - is a /res/ resource
71: # uploaded - is a /uploaded/ resource
72: # contruct - is a /priv/ resource
73: # form.grade_target - a form parameter requesting a specific target
74: sub get_target {
75: &Apache::lonxml::debug("request.state = $env{'request.state'}");
76: if( defined($env{'form.grade_target'})) {
77: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
78: } else {
79: &Apache::lonxml::debug("form.grade_target <undefined>");
80: }
81: if (($env{'request.state'} eq "published") ||
82: ($env{'request.state'} eq "uploaded")) {
83: if ( defined($env{'form.grade_target'} )
84: && ($env{'form.grade_target'} eq 'tex')) {
85: return ($env{'form.grade_target'});
86: } elsif ( defined($env{'form.grade_target'} )
87: && ($Apache::lonhomework::viewgrades eq 'F' )) {
88: return ($env{'form.grade_target'});
89: } elsif ( $env{'form.grade_target'} eq 'webgrade'
90: && ($Apache::lonhomework::queuegrade eq 'F' )) {
91: return ($env{'form.grade_target'});
92: }
93: if ($env{'form.webgrade'} &&
94: ($Apache::lonhomework::modifygrades eq 'F'
95: || $Apache::lonhomework::queuegrade eq 'F' )) {
96: return ('grade','webgrade');
97: }
98: if ( defined($env{'form.submitted'}) &&
99: ( !defined($env{'form.newrandomization'}))) {
100: return ('grade', 'web');
101: } else {
102: return ('web');
103: }
104: } elsif ($env{'request.state'} eq "construct") {
105: if ( defined($env{'form.grade_target'}) ) {
106: return ($env{'form.grade_target'});
107: }
108: if ( defined($env{'form.preview'})) {
109: if ( defined($env{'form.submitted'})) {
110: return ('grade', 'web');
111: } else {
112: return ('web');
113: }
114: } else {
115: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
116: #$env{'form.webgrade'} = 'yes';
117: return ('grade','webgrade','answer');
118: } elsif ( $env{'form.problemmode'} eq &mt('View') ||
119: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
120: if ( defined($env{'form.submitted'}) &&
121: (!defined($env{'form.resetdata'})) &&
122: (!defined($env{'form.newrandomization'}))) {
123: return ('grade', 'web','answer');
124: } else {
125: return ('web','answer');
126: }
127: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
128: $env{'form.problemmode'} eq 'Edit') {
129: if ( $env{'form.submitted'} eq 'edit' ) {
130: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
131: return ('modified','web','answer');
132: } else {
133: return ('modified','no_output_web','edit');
134: }
135: } else {
136: return ('no_output_web','edit');
137: }
138: } else {
139: return ('web');
140: }
141: }
142: }
143: return ();
144: }
145:
146: sub setup_vars {
147: my ($target) = @_;
148: return ';'
149: # return ';$external::target='.$target.';';
150: }
151:
152: sub createmenu {
153: my ($which,$request)=@_;
154: if ($which eq 'grade') {
155: $request->print('<script language="JavaScript">
156: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
157: "height=350,width=150,menubar=no");
158: </script>');
159: }
160: }
161:
162: sub proctor_checked_in {
163: my ($slot_name,$slot,$type)=@_;
164: my @possible_proctors=split(",",$slot->{'proctor'});
165:
166: return 1 if (!@possible_proctors);
167:
168: my $key;
169: if ($type eq 'Task') {
170: my $version=$Apache::lonhomework::history{'resource.0.version'};
171: $key ="resource.$version.0.checkedin";
172: } elsif ($type eq 'problem') {
173: $key ='resource.0.checkedin';
174: }
175: # backward compatability, used to be username@domain,
176: # now is username:domain
177: my $who = $Apache::lonhomework::history{$key};
178: if ($who !~ /:/) {
179: $who =~ tr/@/:/;
180: }
181: foreach my $possible (@possible_proctors) {
182: if ($who eq $possible
183: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
184: return 1;
185: }
186: }
187:
188: return 0;
189: }
190:
191: sub check_ip_acc {
192: my ($acc)=@_;
193: &Apache::lonxml::debug("acc is $acc");
194: if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
195: return 1;
196: }
197: my $allowed=0;
198: my $ip=$ENV{'REMOTE_ADDR'};
199: my $name;
200: foreach my $pattern (split(',',$acc)) {
201: $pattern =~ s/^\s*//;
202: $pattern =~ s/\s*$//;
203: if ($pattern =~ /\*$/) {
204: #35.8.*
205: $pattern=~s/\*//;
206: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
207: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
208: #35.8.3.[34-56]
209: my $low=$2;
210: my $high=$3;
211: $pattern=$1;
212: if ($ip =~ /^\Q$pattern\E/) {
213: my $last=(split(/\./,$ip))[3];
214: if ($last <=$high && $last >=$low) { $allowed=1; }
215: }
216: } elsif ($pattern =~ /^\*/) {
217: #*.msu.edu
218: $pattern=~s/\*//;
219: if (!defined($name)) {
220: use Socket;
221: my $netaddr=inet_aton($ip);
222: ($name)=gethostbyaddr($netaddr,AF_INET);
223: }
224: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
225: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
226: #127.0.0.1
227: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
228: } else {
229: #some.name.com
230: if (!defined($name)) {
231: use Socket;
232: my $netaddr=inet_aton($ip);
233: ($name)=gethostbyaddr($netaddr,AF_INET);
234: }
235: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
236: }
237: if ($allowed) { last; }
238: }
239: return $allowed;
240: }
241:
242: sub check_slot_access {
243: my ($id,$type)=@_;
244:
245: # does it pass normal muster
246: my ($status,$datemsg)=&check_access($id);
247:
248: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
249: if ($useslots ne 'resource' && $useslots ne 'map'
250: && $useslots ne 'map_map') {
251: return ($status,$datemsg);
252: }
253:
254: if ($status eq 'SHOW_ANSWER' ||
255: $status eq 'CLOSED' ||
256: $status eq 'INVALID_ACCESS' ||
257: $status eq 'UNAVAILABLE') {
258: return ($status,$datemsg);
259: }
260: if ($env{'request.state'} eq "construct") {
261: return ($status,$datemsg);
262: }
263:
264: if ($type eq 'Task') {
265: my $version=$Apache::lonhomework::history{'resource.version'};
266: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
267: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
268: return ('SHOW_ANSWER');
269: }
270: }
271:
272: my @slots=
273: (split(':',&Apache::lonnet::EXT("resource.0.availablestudent")),
274: split(':',&Apache::lonnet::EXT("resource.0.available")));
275:
276: # if (!@slots) {
277: # return ($status,$datemsg);
278: # }
279: my $slotstatus='NOT_IN_A_SLOT';
280: my ($returned_slot,$slot_name);
281: foreach my $slot (@slots) {
282: $slot =~ s/(^\s*|\s*$)//g;
283: &Apache::lonxml::debug("getting $slot");
284: my %slot=&Apache::lonnet::get_slot($slot);
285: &Apache::lonhomework::showhash(%slot);
286: if ($slot{'starttime'} < time &&
287: $slot{'endtime'} > time &&
288: &check_ip_acc($slot{'ip'})) {
289: &Apache::lonxml::debug("$slot is good");
290: $slotstatus='NEEDS_CHECKIN';
291: $returned_slot=\%slot;
292: $slot_name=$slot;
293: last;
294: }
295: }
296: if ($slotstatus eq 'NEEDS_CHECKIN' &&
297: &proctor_checked_in($slot_name,$returned_slot,$type)) {
298: &Apache::lonxml::debug("protoctor checked in");
299: $slotstatus='CAN_ANSWER';
300: }
301:
302: my ($is_correct,$got_grade,$checkedin);
303: if ($type eq 'Task') {
304: my $version=$Apache::lonhomework::history{'resource.0.version'};
305: $got_grade =
306: ($Apache::lonhomework::history{"resource.$version.0.status"}
307: =~ /^(?:pass|fail)$/);
308: $is_correct =
309: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
310: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
311: $checkedin =
312: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
313: } elsif ($type eq 'problem') {
314: $got_grade = 1;
315: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
316: $is_correct =
317: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
318: }
319:
320: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
321:
322: # no slot is currently open, and has been checked in for this version
323: # but hasn't got a grade, therefore must be awaiting a grade
324: if (!defined($slot_name)
325: && $checkedin
326: && !$got_grade) {
327: return ('WAITING_FOR_GRADE');
328: }
329:
330: # no slot is currently open, and has been checked in for this version
331: # previous slot is therefore CLOSED, so therefore the problem is
332: if (!defined($slot_name)
333: && $checkedin
334: && $type eq 'problem') {
335: return ('CLOSED',$datemsg);
336: }
337:
338: if ($slotstatus eq 'NOT_IN_A_SLOT'
339: && $checkedin ) {
340:
341: if ($got_grade) {
342: return ('SHOW_ANSWER');
343: } else {
344: return ('WAITING_FOR_GRADE');
345: }
346:
347: }
348:
349: if ( $is_correct) {
350: if ($type eq 'problem') {
351: return ($status);
352: }
353: return ('SHOW_ANSWER');
354: }
355:
356: if ( $status eq 'CANNOT_ANSWER' &&
357: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
358: return ($status,$datemsg);
359: }
360:
361: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
362: }
363:
364: # JB, 9/24/2002: Any changes in this function may require a change
365: # in lonnavmaps::resource::getDateStatus.
366: sub check_access {
367: my ($id) = @_;
368: my $date ='';
369: my $status;
370: my $datemsg = '';
371: my $lastdate = '';
372: my $type;
373: my $passed;
374:
375: if ($env{'request.state'} eq "construct") {
376: if ($env{'form.problemstate'}) {
377: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
378: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
379: lc($Apache::lonhomework::problemstatus) eq 'no')) {
380: return ('CANNOT_ANSWER',
381: &mt('is in this state due to author settings.'));
382: }
383: } else {
384: return ($env{'form.problemstate'},
385: &mt('is in this state due to author settings.'));
386: }
387: }
388: &Apache::lonxml::debug("in construction ignoring dates");
389: $status='CAN_ANSWER';
390: $datemsg=&mt('is in under construction');
391: # return ($status,$datemsg);
392: }
393:
394: &Apache::lonxml::debug("checking for part :$id:");
395: &Apache::lonxml::debug("time:".time);
396:
397: my ($symb)=&Apache::lonnet::whichuser();
398: &Apache::lonxml::debug("symb:".$symb);
399: #if ($env{'request.state'} ne "construct" && $symb ne '') {
400: if ($env{'request.state'} ne "construct") {
401: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
402: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
403: $status='INVALID_ACCESS';
404: $date=&mt("can not be accessed from your location.");
405: return($status,$date);
406: }
407:
408: foreach my $temp ("opendate","duedate","answerdate") {
409: $lastdate = $date;
410: if ($temp eq 'duedate') {
411: $date = &due_date($id);
412: } else {
413: $date = &Apache::lonnet::EXT("resource.$id.$temp");
414: }
415:
416: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
417: if ($thistype =~ /^(con_lost|no_such_host)/ ||
418: $date =~ /^(con_lost|no_such_host)/) {
419: $status='UNAVAILABLE';
420: $date=&mt("may open later.");
421: return($status,$date);
422: }
423: if ($thistype eq 'date_interval') {
424: if ($temp eq 'opendate') {
425: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
426: }
427: if ($temp eq 'answerdate') {
428: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
429: }
430: }
431: &Apache::lonxml::debug("found :$date: for :$temp:");
432: if ($date eq '') {
433: $date = &mt("an unknown date"); $passed = 0;
434: } elsif ($date eq 'con_lost') {
435: $date = &mt("an indeterminate date"); $passed = 0;
436: } else {
437: if (time < $date) { $passed = 0; } else { $passed = 1; }
438: $date = localtime $date;
439: }
440: if (!$passed) { $type=$temp; last; }
441: }
442: &Apache::lonxml::debug("have :$type:$passed:");
443: if ($passed) {
444: $status='SHOW_ANSWER';
445: $datemsg=$date;
446: } elsif ($type eq 'opendate') {
447: $status='CLOSED';
448: $datemsg = &mt("will open on")." $date";
449: } elsif ($type eq 'duedate') {
450: $status='CAN_ANSWER';
451: $datemsg = &mt("is due at")." $date";
452: } elsif ($type eq 'answerdate') {
453: $status='CLOSED';
454: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
455: }
456: }
457: if ($status eq 'CAN_ANSWER' ||
458: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
459: #check #tries, and if correct.
460: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
461: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
462: if ( $tries eq '' ) { $tries = '0'; }
463: if ( $maxtries eq '' &&
464: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
465: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
466: # if (correct and show prob status) or excused then CANNOT_ANSWER
467: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
468: &&
469: lc($Apache::lonhomework::problemstatus) ne 'no')
470: ||
471: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
472: $status = 'CANNOT_ANSWER';
473: }
474: }
475: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
476: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
477: &Apache::lonxml::debug("looking for interval $interval");
478: if ($interval) {
479: my $first_access=&Apache::lonnet::get_first_access('map');
480: &Apache::lonxml::debug("looking for accesstime $first_access");
481: if (!$first_access) {
482: $status='NOT_YET_VIEWED';
483: my $due_date = &due_date($id);
484: my $seconds_left = $due_date - time;
485: if ($seconds_left > $interval || $due_date eq '') {
486: $seconds_left = $interval;
487: }
488: $datemsg=&seconds_to_human_length($seconds_left);
489: }
490: }
491: }
492:
493: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
494: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
495: # return ('UNCHECKEDOUT','needs to be checked out');
496: #}
497:
498:
499: &Apache::lonxml::debug("sending back :$status:$datemsg:");
500: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
501: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
502: $status='CAN_ANSWER';
503: $datemsg=&mt('is closed but you are allowed to view it');
504: }
505:
506: return ($status,$datemsg);
507: }
508: # this should work exactly like the copy in lonnavmaps.pm
509: sub due_date {
510: my ($part_id,$symb,$udom,$uname)=@_;
511: my $date;
512: my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
513: $udom,$uname);
514: &Apache::lonxml::debug("looking for interval $part_id $symb $interval");
515: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
516: $udom,$uname);
517: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
518: if ($interval =~ /\d+/) {
519: my $first_access=&Apache::lonnet::get_first_access('map',$symb);
520: &Apache::lonxml::debug("looking for first_access $first_access");
521: if (defined($first_access)) {
522: $interval = $first_access+$interval;
523: $date = ($interval < $due_date)? $interval : $due_date;
524: } else {
525: $date = $due_date;
526: }
527: } else {
528: $date = $due_date;
529: }
530: return $date
531: }
532:
533: sub seconds_to_human_length {
534: my ($length)=@_;
535:
536: my $seconds=$length%60; $length=int($length/60);
537: my $minutes=$length%60; $length=int($length/60);
538: my $hours=$length%24; $length=int($length/24);
539: my $days=$length;
540:
541: my $timestr;
542: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
543: if ($hours > 0) { $timestr.=($timestr?", ":"").
544: &mt('[quant,_1,hour]',$hours); }
545: if ($minutes > 0) { $timestr.=($timestr?", ":"").
546: &mt('[quant,_1,minute]',$minutes); }
547: if ($seconds > 0) { $timestr.=($timestr?", ":"").
548: &mt('[quant,_1,second]',$seconds); }
549: return $timestr;
550: }
551:
552: sub showhash {
553: my (%hash) = @_;
554: &showhashsubset(\%hash,'.');
555: return '';
556: }
557:
558: sub showarray {
559: my ($array)=@_;
560: my $string="(";
561: foreach my $elm (@{ $array }) {
562: if (ref($elm) eq 'ARRAY') {
563: $string.=&showarray($elm);
564: } elsif (ref($elm) eq 'HASH') {
565: $string.= "HASH --- \n<br />";
566: $string.= &showhashsubset($elm,'.');
567: } else {
568: $string.="$elm,"
569: }
570: }
571: chop($string);
572: $string.=")";
573: return $string;
574: }
575:
576: sub showhashsubset {
577: my ($hash,$keyre) = @_;
578: my $resultkey;
579: foreach $resultkey (sort keys %$hash) {
580: if ($resultkey !~ /$keyre/) { next; }
581: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
582: &Apache::lonxml::debug("$resultkey ---- ".
583: &showarray($$hash{$resultkey}));
584: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
585: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
586: &showhashsubset($$hash{$resultkey},'.');
587: } else {
588: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
589: }
590: }
591: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
592: return '';
593: }
594:
595: sub setuppermissions {
596: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
597: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
598: if (! $viewgrades &&
599: exists($env{'request.course.sec'}) &&
600: $env{'request.course.sec'} !~ /^\s*$/) {
601: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
602: '/'.$env{'request.course.sec'});
603: }
604: $Apache::lonhomework::viewgrades = $viewgrades;
605:
606: if ($Apache::lonhomework::browse eq 'F' &&
607: $env{'form.devalidatecourseresdata'} eq 'on') {
608: my (undef,$courseid) = &Apache::lonnet::whichuser();
609: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
610: $env{"course.$courseid.domain"});
611: }
612:
613: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
614: if (! $modifygrades &&
615: exists($env{'request.course.sec'}) &&
616: $env{'request.course.sec'} !~ /^\s*$/) {
617: $modifygrades =
618: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
619: '/'.$env{'request.course.sec'});
620: }
621: $Apache::lonhomework::modifygrades = $modifygrades;
622:
623: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
624: if (! $queuegrade &&
625: exists($env{'request.course.sec'}) &&
626: $env{'request.course.sec'} !~ /^\s*$/) {
627: $queuegrade =
628: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
629: '/'.$env{'request.course.sec'});
630: }
631: $Apache::lonhomework::queuegrade = $queuegrade;
632: return '';
633: }
634:
635: sub unset_permissions {
636: undef($Apache::lonhomework::queuegrade);
637: undef($Apache::lonhomework::modifygrades);
638: undef($Apache::lonhomework::viewgrades);
639: undef($Apache::lonhomework::browse);
640: }
641:
642: sub setupheader {
643: my $request=$_[0];
644: &Apache::loncommon::content_type($request,'text/html');
645: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
646: &Apache::loncommon::no_cache($request);
647: }
648: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
649: # 'lastrevisiondate'));
650: $request->send_http_header;
651: return OK if $request->header_only;
652: return ''
653: }
654:
655: sub handle_save_or_undo {
656: my ($request,$problem,$result) = @_;
657: my $file = &Apache::lonnet::filelocation("",$request->uri);
658: my $filebak =$file.".bak";
659: my $filetmp =$file.".tmp";
660: my $error=0;
661: if ($env{'form.Undo'} eq &mt('undo')) {
662: my $error=0;
663: if (!copy($file,$filetmp)) { $error=1; }
664: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
665: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
666: if (!$error) {
667: &Apache::lonxml::info("<p><b>".
668: &mt("Undid changes, Switched [_1] and [_2]",
669: '<span class="LC_filename">'.$filebak.
670: '</span>',
671: '<span class="LC_filename">'.$file.
672: '</span>')."</b></p>");
673: } else {
674: &Apache::lonxml::info("<p><span class=\"LC_error\">".
675: &mt("Unable to undo, unable to switch [_1] and [_2]",
676: '<span class="LC_filename">'.
677: $filebak.'</span>',
678: '<span class="LC_filename">'.
679: $file.'</span>')."</span></p>");
680: $error=1;
681: }
682: } else {
683: &Apache::lonnet::correct_line_ends($result);
684: my $fs=Apache::File->new(">$filebak");
685: if (defined($fs)) {
686: print $fs $$problem;
687: &Apache::lonxml::info("<b>".&mt("Making Backup to [_1]",
688: '<span class="LC_filename">'.
689: $filebak.'</span>').
690: "</b>");
691: } else {
692: &Apache::lonxml::info("<span class=\"LC_error\">".
693: &mt("Unable to make backup [_1]",
694: '<span class="LC_filename">'.
695: $filebak.'</span>')."</span>");
696: $error=2;
697: }
698: my $fh=Apache::File->new(">$file");
699: if (defined($fh)) {
700: print $fh $$result;
701: &Apache::lonxml::info("<b>".&mt("Saving Modifications to [_1]",
702: '<span class="LC_filename">'.
703: $file.'</span>' )."</b>");
704: } else {
705: &Apache::lonxml::info('<span class="LC_error">'.
706: &mt("Unable to write to [_1]",
707: '<span class="LC_filename">'.
708: $file.'</span>').
709: '</span>');
710: $error|=4;
711: }
712: }
713: return $error;
714: }
715:
716: sub analyze_header {
717: my ($request) = @_;
718: my $result =
719: &Apache::loncommon::start_page('Analyzing a problem',undef);
720:
721: $result .=
722: &Apache::lonxml::message_location().'
723: <form name="lonhomework" method="POST" action="'.
724: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
725: &Apache::structuretags::remember_problem_state().'
726: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
727: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
728: <hr />
729: <input type="submit" name="submit" value="'.&mt("View").'" />
730: <hr />
731: </form>';
732: &Apache::lonxml::add_messages(\$result);
733: $request->print($result);
734: $request->rflush();
735: }
736:
737: sub analyze_footer {
738: my ($request) = @_;
739: $request->print(&Apache::loncommon::end_page());
740: $request->rflush();
741: }
742:
743: sub analyze {
744: my ($request,$file) = @_;
745: &Apache::lonxml::debug("Analyze");
746: my $result;
747: my %overall;
748: my %seedexample;
749: my %allparts;
750: my $rndseed=$env{'form.rndseed'};
751: &analyze_header($request);
752: my %prog_state=
753: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
754: &mt('Getting Problem Variants'),
755: $env{'form.numtoanalyze'},
756: 'inline',undef);
757: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
758: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
759: &mt('last problem'));
760: if (&Apache::loncommon::connection_aborted($request)) { return; }
761: my $thisseed=$i+$rndseed;
762: my $subresult=&Apache::lonnet::ssi($request->uri,
763: ('grade_target' => 'analyze'),
764: ('rndseed' => $thisseed));
765: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
766: my %analyze=&Apache::lonnet::str2hash($subresult);
767: my @parts;
768: if (defined(@{ $analyze{'parts'} })) {
769: @parts=@{ $analyze{'parts'} };
770: }
771: foreach my $part (@parts) {
772: if (!exists($allparts{$part})) {$allparts{$part}=1;};
773: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
774: $analyze{$part.'.type'} eq 'stringresponse' ||
775: $analyze{$part.'.type'} eq 'formularesponse' ) {
776: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
777: my $i=0;
778: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
779: push( @{ $overall{$part.'.answer'}[$i] },
780: $answer_part);
781: my $concatanswer= join("\0",@{ $answer_part });
782: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
783: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
784: }
785: $seedexample{join("\0",$part,$i,@{$answer_part})}=
786: $thisseed;
787: $i++;
788: }
789: }
790: }
791: }
792: }
793: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
794: &mt('Analyzing Results'));
795: $request->print('<hr />'.&mt('List of possible answers').': ');
796: foreach my $part (sort(keys(%allparts))) {
797: if (defined(@{ $overall{$part.'.answer'} })) {
798: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
799: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
800: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part);
801: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
802: $request->print(&mt(' Answer [_1]',$i+1));
803: }
804: $request->print('</th></tr>');
805: my %frequency;
806: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
807: $frequency{join("\0",@{ $answer })}++;
808: }
809: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
810: .&mt('click for example').')</th></tr>');
811: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
812: $request->print('<tr><td class="center">'.
813: join('</td><td class="center">',split("\0",$answer)).
814: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.
815: '</a></td></tr>');
816: }
817: $request->print('</table>');
818: }
819: } else {
820: $request->print('<p>'.&mt('Response').' '.$part.' '.
821: &mt('is not analyzable at this time').'</p>');
822: }
823: }
824: if (scalar(keys(%allparts)) == 0 ) {
825: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
826: }
827: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
828: &analyze_footer($request);
829: &Apache::lonhomework::showhash(%overall);
830: return $result;
831: }
832:
833: sub editxmlmode {
834: my ($request,$file) = @_;
835: my $result;
836: my $problem=&Apache::lonnet::getfile($file);
837: if ($problem eq -1) {
838: &Apache::lonxml::error("<b> ".&mt('Unable to find').
839: " <i>$file</i></b>");
840: $problem='';
841: }
842: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
843: my $error=&handle_save_or_undo($request,\$problem,
844: \$env{'form.editxmltext'});
845: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
846: }
847: &Apache::lonhomework::showhashsubset(\%env,'^form');
848: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
849: &Apache::lonhomework::showhashsubset(\%env,'^form');
850: $env{'form.problemmode'}='View';
851: &renderpage($request,$file);
852: } else {
853: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
854: my $xml_help = '<table><tr><td>'.
855: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
856: "Problem Editing Help").
857: '</td><td>'.
858: &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
859: '</td></tr></table>';
860: if ($cols > 80) { $cols = 80; }
861: if ($cols < 70) { $cols = 70; }
862: if ($rows < 20) { $rows = 20; }
863: my $js =
864: &Apache::edit::js_change_detection().
865: &Apache::loncommon::resize_textarea_js();
866: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
867: my $start_page =
868: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
869: {'no_auto_mt_title' => 1,
870: 'only_body' => $only_body,
871: 'add_entries' => {
872: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
873: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
874: }});
875:
876: $result.=$start_page.
877: &renderpage($request,$file,['no_output_web'],1).
878: &Apache::lonxml::message_location().'
879: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
880: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
881: &Apache::structuretags::remember_problem_state().'
882: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
883: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
884: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
885: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
886: <hr />
887: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
888: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
889: <hr />
890: ' . $xml_help . '
891: <textarea '.&Apache::edit::element_change_detection().
892: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
893: ' name="editxmltext" id="LC_editxmltext">'.
894: &HTML::Entities::encode($problem,'<>&"').'</textarea>
895: <div id="LC_aftertextarea">
896: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
897: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
898: </div>
899: </form>'.&Apache::loncommon::end_page();
900: &Apache::lonxml::add_messages(\$result);
901: $request->print($result);
902: }
903: return '';
904: }
905:
906: #
907: # Render the page in whatever target desired.
908: #
909: sub renderpage {
910: my ($request,$file,$targets,$return_string) = @_;
911:
912: my @targets = @{$targets || [&get_target()]};
913: &Apache::lonhomework::showhashsubset(\%env,'form.');
914: &Apache::lonxml::debug("Running targets ".join(':',@targets));
915:
916: my $overall_result;
917: foreach my $target (@targets) {
918: # FIXME need to do something intelligent when a problem goes
919: # from viewable to not viewable due to map conditions
920: #&setuppermissions();
921: #if ( $Apache::lonhomework::browse ne '2'
922: # && $Apache::lonhomework::browse ne 'F' ) {
923: # $request->print(" You most likely shouldn't see me.");
924: #}
925: #my $t0 = [&gettimeofday()];
926: my $output=1;
927: if ($target eq 'no_output_web') {
928: $target = 'web'; $output=0;
929: }
930: my $problem=&Apache::lonnet::getfile($file);
931: my $result;
932: if ($problem eq -1) {
933: $problem='';
934: my $filename=(split('/',$file))[-1];
935: my $error =
936: "<b> ".&mt('Unable to find [_1]',
937: ' <span class="LC_filename">'.$filename.'</span>')
938: ."</b>";
939: $result.=
940: &Apache::loncommon::simple_error_page($request,'Not available',
941: $error);
942: return;
943: }
944:
945: my %mystyle;
946: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
947: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
948: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
949:
950: &Apache::lonxml::debug("Should be parsing now");
951: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
952: &setup_vars($target),%mystyle);
953: undef($Apache::lonhomework::parsing_a_problem);
954: if (!$output) { $result = ''; }
955: #$request->print("Result follows:");
956: if ($target eq 'modified') {
957: &handle_save_or_undo($request,\$problem,\$result);
958: } else {
959: if ($target eq 'analyze') {
960: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
961: undef(%Apache::lonhomework::analyze);
962: }
963: #my $td=&tv_interval($t0);
964: #if ( $Apache::lonxml::debug) {
965: #$result =~ s:</body>::;
966: #$result.="<br />Spent $td seconds processing target $target\n</body>";
967: #}
968: # $request->print($result);
969: $overall_result.=$result;
970: # $request->rflush();
971: }
972: #$request->print(":Result ends");
973: #my $td=&tv_interval($t0);
974: }
975: if (!$return_string) {
976: &Apache::lonxml::add_messages(\$overall_result);
977: $request->print($overall_result);
978: $request->rflush();
979: } else {
980: return $overall_result;
981: }
982: }
983:
984: # with no arg it returns a HTML <option> list of the template titles
985: # with one arg it returns the filename associated with the arg passed
986: sub get_template_list {
987: my ($namewanted,$extension) = @_;
988: my $result;
989: my @allnames;
990: &Apache::lonxml::debug("Looking for :$extension:");
991: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
992: &Apache::lonxml::debug("Looking at $file");
993: my $name=&Apache::lonnet::metadata($file,'title');
994: &Apache::lonxml::debug("Got a name $name");
995: if ($namewanted && ($name eq $namewanted)) {
996: $result=$file;
997: last;
998: } else {
999: if ($name) { push (@allnames, $name); }
1000: }
1001: }
1002: if (@allnames && !$result) {
1003: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1004: join('</option><option>',sort(@allnames)).'</option>';
1005: }
1006: return $result;
1007: }
1008:
1009: sub newproblem {
1010: my ($request) = @_;
1011: my $extension=$request->uri;
1012: $extension=~s:^.*\.([\w]+)$:$1:;
1013: &Apache::lonxml::debug("Looking for :$extension:");
1014: my $templatelist=&get_template_list('',$extension);
1015: if ($env{'form.template'} &&
1016: $env{'form.template'} ne "Select a $extension template") {
1017: use File::Copy;
1018: my $file = &get_template_list($env{'form.template'},$extension);
1019: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1020: copy($file,$dest);
1021: &renderpage($request,$dest);
1022: } elsif($env{'form.newfile'} && !$templatelist) {
1023: # I don't like hard-coded filenames but for now, this will work.
1024: use File::Copy;
1025: my $templatefilename =
1026: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1027: &Apache::lonxml::debug("$templatefilename");
1028: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1029: copy($templatefilename,$dest);
1030: &renderpage($request,$dest);
1031: } else {
1032: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1033: my $shownurl=$url;
1034: $shownurl=~s-^/~-/priv/-;
1035: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1036: my $errormsg;
1037: if ($env{'form.newfile'}) {
1038: $errormsg='<p><span class="LC_error">'.&mt('You did not select a template.').'</span></p>'."\n";
1039: }
1040: my $instructions;
1041: my $start_page =
1042: &Apache::loncommon::start_page("Create New $extension");
1043: $request->print("
1044: $start_page
1045: <h1>".&mt("Creating a new $extension resource.")."</h1>
1046: $errormsg
1047: ".&mt("The requested file [_1] currently does not exist.",
1048: "<tt>$shownurl</tt>")."
1049: <p>
1050: <b>
1051: ".&mt("To create a new $extension, select a template from the".
1052: "pull-down menu below. Then click on the \"Create $extension\" button.")."</b>
1053: </p><form action=\"$url\" method=\"POST\">");
1054:
1055: if (defined($templatelist)) {
1056: $request->print("<select name=\"template\">$templatelist</select>");
1057: }
1058: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1059: $request->print("</form></p>".&Apache::loncommon::end_page());
1060: }
1061: return '';
1062: }
1063:
1064: sub update_construct_style {
1065: if ($env{'request.state'} eq "construct"
1066: && $env{'form.problemmode'} eq &mt('View')
1067: && defined($env{'form.submitted'})
1068: && !defined($env{'form.resetdata'})
1069: && !defined($env{'form.newrandomization'})) {
1070: if ((!$env{'form.style_file'} && $env{'construct.style'})
1071: ||$env{'form.clear_style_file'}) {
1072: &Apache::lonnet::delenv('construct\\.style');
1073: } elsif ($env{'form.style_file'}
1074: && $env{'construct.style'} ne $env{'form.style_file'}) {
1075: &Apache::lonnet::appenv('construct.style' =>
1076: $env{'form.style_file'});
1077: }
1078: }
1079: }
1080:
1081:
1082: sub handler {
1083: #my $t0 = [&gettimeofday()];
1084: my $request=$_[0];
1085: $Apache::lonxml::request=$request;
1086: $Apache::lonxml::debug=$env{'user.debug'};
1087: $env{'request.uri'}=$request->uri;
1088: &setuppermissions();
1089: # some times multiple problemmodes are submitted, need to select
1090: # the last one
1091: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
1092: my $mode=$env{'form.problemmode'}->[-1];
1093: undef $env{'form.problemmode'};
1094: $env{'form.problemmode'}=$mode;
1095: }
1096:
1097: my $file=&Apache::lonnet::filelocation("",$request->uri);
1098:
1099: #check if we know where we are
1100: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1101: # if we are browsing we might not be able to know where we are
1102: if ($Apache::lonhomework::browse ne 'F' &&
1103: $env{'request.state'} ne "construct") {
1104: #should know where we are, so ask
1105: &unset_permissions();
1106: $request->internal_redirect('/adm/ambiguous');
1107: return OK;
1108: }
1109: }
1110: if (&setupheader($request)) {
1111: &unset_permissions();
1112: return OK;
1113: }
1114: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1115: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1116: my ($symb) = &Apache::lonnet::whichuser();
1117: &Apache::lonxml::debug('symb is '.$symb);
1118: if ($env{'request.state'} eq "construct") {
1119: if ( -e $file ) {
1120: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1121: ['problemmode']);
1122: if (!(defined $env{'form.problemmode'})) {
1123: #first visit to problem in construction space
1124: $env{'form.problemmode'}='View';
1125: &renderpage($request,$file);
1126: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
1127: $env{'form.problemmode'} eq 'EditXML') {
1128: &editxmlmode($request,$file);
1129: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1130: &analyze($request,$file);
1131: } else {
1132: &update_construct_style();
1133: &renderpage($request,$file);
1134: }
1135: } else {
1136: # requested file doesn't exist in contruction space
1137: &newproblem($request);
1138: }
1139: } else {
1140: # just render the page normally outside of construction space
1141: &Apache::lonxml::debug("not construct");
1142: &renderpage($request,$file);
1143: }
1144: #my $td=&tv_interval($t0);
1145: #&Apache::lonxml::debug("Spent $td seconds processing");
1146: # always turn off debug messages
1147: $Apache::lonxml::debug=0;
1148: &unset_permissions();
1149: return OK;
1150:
1151: }
1152:
1153: 1;
1154: __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