1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.256 2006/06/30 17:42:38 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($env{'form.resetdata'})) &&
100: ( !defined($env{'form.newrandomization'}))) {
101: return ('grade', 'web');
102: } else {
103: return ('web');
104: }
105: } elsif ($env{'request.state'} eq "construct") {
106: if ( defined($env{'form.grade_target'}) ) {
107: return ($env{'form.grade_target'});
108: }
109: if ( defined($env{'form.preview'})) {
110: if ( defined($env{'form.submitted'})) {
111: return ('grade', 'web');
112: } else {
113: return ('web');
114: }
115: } else {
116: if ( $env{'form.problemmode'} eq &mt('View') ||
117: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
118: if ( defined($env{'form.submitted'}) &&
119: (!defined($env{'form.resetdata'})) &&
120: (!defined($env{'form.newrandomization'}))) {
121: return ('grade', 'web','answer');
122: } else {
123: return ('web','answer');
124: }
125: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
126: $env{'form.problemmode'} eq 'Edit') {
127: if ( $env{'form.submitted'} eq 'edit' ) {
128: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
129: return ('modified','web','answer');
130: } else {
131: return ('modified','no_output_web','edit');
132: }
133: } else {
134: return ('no_output_web','edit');
135: }
136: } else {
137: return ('web');
138: }
139: }
140: }
141: return ();
142: }
143:
144: sub setup_vars {
145: my ($target) = @_;
146: return ';'
147: # return ';$external::target='.$target.';';
148: }
149:
150: sub createmenu {
151: my ($which,$request)=@_;
152: if ($which eq 'grade') {
153: $request->print('<script language="JavaScript">
154: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
155: "height=350,width=150,menubar=no");
156: </script>');
157: }
158: }
159:
160: sub proctor_checked_in {
161: my ($slot_name,$slot,$type)=@_;
162: my @possible_proctors=split(",",$slot->{'proctor'});
163:
164: return 1 if (!@possible_proctors);
165:
166: my $key;
167: if ($type eq 'Task') {
168: my $version=$Apache::lonhomework::history{'resource.0.version'};
169: $key ="resource.$version.0.checkedin";
170: } elsif ($type eq 'problem') {
171: $key ='resource.0.checkedin';
172: }
173: # backward compatability, used to be username@domain,
174: # now is username:domain
175: my $who = $Apache::lonhomework::history{$key};
176: if ($who !~ /:/) {
177: $who =~ tr/@/:/;
178: }
179: foreach my $possible (@possible_proctors) {
180: if ($who eq $possible
181: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
182: return 1;
183: }
184: }
185:
186: return 0;
187: }
188:
189: $Apache::lonxml::browse='';
190: sub check_ip_acc {
191: my ($acc)=@_;
192: &Apache::lonxml::debug("acc is $acc");
193: if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
194: return 1;
195: }
196: my $allowed=0;
197: my $ip=$ENV{'REMOTE_ADDR'};
198: my $name;
199: foreach my $pattern (split(',',$acc)) {
200: $pattern =~ s/^\s*//;
201: $pattern =~ s/\s*$//;
202: if ($pattern =~ /\*$/) {
203: #35.8.*
204: $pattern=~s/\*//;
205: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
206: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
207: #35.8.3.[34-56]
208: my $low=$2;
209: my $high=$3;
210: $pattern=$1;
211: if ($ip =~ /^\Q$pattern\E/) {
212: my $last=(split(/\./,$ip))[3];
213: if ($last <=$high && $last >=$low) { $allowed=1; }
214: }
215: } elsif ($pattern =~ /^\*/) {
216: #*.msu.edu
217: $pattern=~s/\*//;
218: if (!defined($name)) {
219: use Socket;
220: my $netaddr=inet_aton($ip);
221: ($name)=gethostbyaddr($netaddr,AF_INET);
222: }
223: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
224: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
225: #127.0.0.1
226: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
227: } else {
228: #some.name.com
229: if (!defined($name)) {
230: use Socket;
231: my $netaddr=inet_aton($ip);
232: ($name)=gethostbyaddr($netaddr,AF_INET);
233: }
234: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
235: }
236: if ($allowed) { last; }
237: }
238: return $allowed;
239: }
240:
241: sub check_slot_access {
242: my ($id,$type)=@_;
243:
244: # does it pass normal muster
245: my ($status,$datemsg)=&check_access($id);
246:
247: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
248: if ($useslots ne 'resource' && $useslots ne 'map'
249: && $useslots ne 'map_map') {
250: return ($status,$datemsg);
251: }
252:
253: if ($status eq 'SHOW_ANSWER' ||
254: $status eq 'CLOSED' ||
255: $status eq 'INVALID_ACCESS' ||
256: $status eq 'UNAVAILABLE') {
257: return ($status,$datemsg);
258: }
259: if ($env{'request.state'} eq "construct") {
260: return ($status,$datemsg);
261: }
262:
263: if ($type eq 'Task') {
264: my $version=$Apache::lonhomework::history{'resource.version'};
265: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
266: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
267: return ('SHOW_ANSWER');
268: }
269: }
270:
271: my @slots=
272: (split(':',&Apache::lonnet::EXT("resource.0.availablestudent")),
273: split(':',&Apache::lonnet::EXT("resource.0.available")));
274:
275: # if (!@slots) {
276: # return ($status,$datemsg);
277: # }
278: my $slotstatus='NOT_IN_A_SLOT';
279: my ($returned_slot,$slot_name);
280: foreach my $slot (@slots) {
281: $slot =~ s/(^\s*|\s*$)//g;
282: &Apache::lonxml::debug("getting $slot");
283: my %slot=&Apache::lonnet::get_slot($slot);
284: &Apache::lonhomework::showhash(%slot);
285: if ($slot{'starttime'} < time &&
286: $slot{'endtime'} > time &&
287: &check_ip_acc($slot{'ip'})) {
288: &Apache::lonxml::debug("$slot is good");
289: $slotstatus='NEEDS_CHECKIN';
290: $returned_slot=\%slot;
291: $slot_name=$slot;
292: last;
293: }
294: }
295: if ($slotstatus eq 'NEEDS_CHECKIN' &&
296: &proctor_checked_in($slot_name,$returned_slot,$type)) {
297: &Apache::lonxml::debug("protoctor checked in");
298: $slotstatus='CAN_ANSWER';
299: }
300:
301: my ($is_correct,$got_grade,$checkedin);
302: if ($type eq 'Task') {
303: my $version=$Apache::lonhomework::history{'resource.0.version'};
304: $got_grade =
305: ($Apache::lonhomework::history{"resource.$version.0.status"}
306: =~ /^(?:pass|fail)$/);
307: $is_correct =
308: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
309: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
310: $checkedin =
311: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
312: } elsif ($type eq 'problem') {
313: $got_grade = 1;
314: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
315: $is_correct =
316: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
317: }
318:
319: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
320:
321: # no slot is currently open, and has been checked in for this version
322: # but hasn't got a grade, therefore must be awaiting a grade
323: if (!defined($slot_name)
324: && $checkedin
325: && !$got_grade) {
326: return ('WAITING_FOR_GRADE');
327: }
328:
329: # no slot is currently open, and has been checked in for this version
330: # previous slot is therefore CLOSED, so therefore the problem is
331: if (!defined($slot_name)
332: && $checkedin
333: && $type eq 'problem') {
334: return ('CLOSED',$datemsg);
335: }
336:
337: if ($slotstatus eq 'NOT_IN_A_SLOT'
338: && $checkedin ) {
339:
340: if ($got_grade) {
341: return ('SHOW_ANSWER');
342: } else {
343: return ('WAITING_FOR_GRADE');
344: }
345:
346: }
347:
348: if ( $is_correct) {
349: if ($type eq 'problem') {
350: return ($status);
351: }
352: return ('SHOW_ANSWER');
353: }
354:
355: if ( $status eq 'CANNOT_ANSWER' &&
356: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
357: return ($status,$datemsg);
358: }
359:
360: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
361: }
362:
363: # JB, 9/24/2002: Any changes in this function may require a change
364: # in lonnavmaps::resource::getDateStatus.
365: sub check_access {
366: my ($id) = @_;
367: my $date ='';
368: my $status;
369: my $datemsg = '';
370: my $lastdate = '';
371: my $type;
372: my $passed;
373:
374: if ($env{'request.state'} eq "construct") {
375: if ($env{'form.problemstate'}) {
376: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
377: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
378: lc($Apache::lonhomework::problemstatus) eq 'no')) {
379: return ('CANNOT_ANSWER',
380: &mt('is in this state due to author settings.'));
381: }
382: } else {
383: return ($env{'form.problemstate'},
384: &mt('is in this state due to author settings.'));
385: }
386: }
387: &Apache::lonxml::debug("in construction ignoring dates");
388: $status='CAN_ANSWER';
389: $datemsg=&mt('is in under construction');
390: # return ($status,$datemsg);
391: }
392:
393: &Apache::lonxml::debug("checking for part :$id:");
394: &Apache::lonxml::debug("time:".time);
395:
396: my ($symb)=&Apache::lonxml::whichuser();
397: &Apache::lonxml::debug("symb:".$symb);
398: #if ($env{'request.state'} ne "construct" && $symb ne '') {
399: if ($env{'request.state'} ne "construct") {
400: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
401: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
402: $status='INVALID_ACCESS';
403: $date=&mt("can not be accessed from your location.");
404: return($status,$date);
405: }
406:
407: foreach my $temp ("opendate","duedate","answerdate") {
408: $lastdate = $date;
409: if ($temp eq 'duedate') {
410: $date = &due_date($id);
411: } else {
412: $date = &Apache::lonnet::EXT("resource.$id.$temp");
413: }
414:
415: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
416: if ($thistype =~ /^(con_lost|no_such_host)/ ||
417: $date =~ /^(con_lost|no_such_host)/) {
418: $status='UNAVAILABLE';
419: $date=&mt("may open later.");
420: return($status,$date);
421: }
422: if ($thistype eq 'date_interval') {
423: if ($temp eq 'opendate') {
424: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
425: }
426: if ($temp eq 'answerdate') {
427: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
428: }
429: }
430: &Apache::lonxml::debug("found :$date: for :$temp:");
431: if ($date eq '') {
432: $date = &mt("an unknown date"); $passed = 0;
433: } elsif ($date eq 'con_lost') {
434: $date = &mt("an indeterminate date"); $passed = 0;
435: } else {
436: if (time < $date) { $passed = 0; } else { $passed = 1; }
437: $date = localtime $date;
438: }
439: if (!$passed) { $type=$temp; last; }
440: }
441: &Apache::lonxml::debug("have :$type:$passed:");
442: if ($passed) {
443: $status='SHOW_ANSWER';
444: $datemsg=$date;
445: } elsif ($type eq 'opendate') {
446: $status='CLOSED';
447: $datemsg = &mt("will open on")." $date";
448: } elsif ($type eq 'duedate') {
449: $status='CAN_ANSWER';
450: $datemsg = &mt("is due at")." $date";
451: } elsif ($type eq 'answerdate') {
452: $status='CLOSED';
453: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
454: }
455: }
456: if ($status eq 'CAN_ANSWER' ||
457: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
458: #check #tries, and if correct.
459: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
460: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
461: if ( $tries eq '' ) { $tries = '0'; }
462: if ( $maxtries eq '' &&
463: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
464: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
465: # if (correct and show prob status) or excused then CANNOT_ANSWER
466: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
467: &&
468: lc($Apache::lonhomework::problemstatus) ne 'no')
469: ||
470: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
471: $status = 'CANNOT_ANSWER';
472: }
473: }
474: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
475: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
476: &Apache::lonxml::debug("looking for interval $interval");
477: if ($interval) {
478: my $first_access=&Apache::lonnet::get_first_access('map');
479: &Apache::lonxml::debug("looking for accesstime $first_access");
480: if (!$first_access) {
481: $status='NOT_YET_VIEWED';
482: my $due_date = &due_date($id);
483: my $seconds_left = $due_date - time;
484: if ($seconds_left > $interval || $due_date eq '') {
485: $seconds_left = $interval;
486: }
487: $datemsg=&seconds_to_human_length($seconds_left);
488: }
489: }
490: }
491:
492: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
493: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
494: # return ('UNCHECKEDOUT','needs to be checked out');
495: #}
496:
497:
498: &Apache::lonxml::debug("sending back :$status:$datemsg:");
499: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
500: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
501: $status='CAN_ANSWER';
502: $datemsg=&mt('is closed but you are allowed to view it');
503: }
504:
505: return ($status,$datemsg);
506: }
507: # this should work exactly like the copy in lonnavmaps.pm
508: sub due_date {
509: my ($part_id,$symb,$udom,$uname)=@_;
510: my $date;
511: my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
512: $udom,$uname);
513: &Apache::lonxml::debug("looking for interval $part_id $symb $interval");
514: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
515: $udom,$uname);
516: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
517: if (defined($interval)) {
518: my $first_access=&Apache::lonnet::get_first_access('map',$symb);
519: if (defined($first_access)) {
520: $interval = $first_access+$interval;
521: $date = ($interval < $due_date)? $interval : $due_date;
522: } else {
523: $date = $due_date;
524: }
525: } else {
526: $date = $due_date;
527: }
528: return $date
529: }
530:
531: sub seconds_to_human_length {
532: my ($length)=@_;
533:
534: my $seconds=$length%60; $length=int($length/60);
535: my $minutes=$length%60; $length=int($length/60);
536: my $hours=$length%24; $length=int($length/24);
537: my $days=$length;
538:
539: my $timestr;
540: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
541: if ($hours > 0) { $timestr.=($timestr?", ":"").
542: &mt('[quant,_1,hour]',$hours); }
543: if ($minutes > 0) { $timestr.=($timestr?", ":"").
544: &mt('[quant,_1,minute]',$minutes); }
545: if ($seconds > 0) { $timestr.=($timestr?", ":"").
546: &mt('[quant,_1,second]',$seconds); }
547: return $timestr;
548: }
549:
550: sub showhash {
551: my (%hash) = @_;
552: &showhashsubset(\%hash,'.');
553: return '';
554: }
555:
556: sub showarray {
557: my ($array)=@_;
558: my $string="(";
559: foreach my $elm (@{ $array }) {
560: if (ref($elm) eq 'ARRAY') {
561: $string.=&showarray($elm);
562: } elsif (ref($elm) eq 'HASH') {
563: $string.= "HASH --- \n<br />";
564: $string.= &showhashsubset($elm,'.');
565: } else {
566: $string.="$elm,"
567: }
568: }
569: chop($string);
570: $string.=")";
571: return $string;
572: }
573:
574: sub showhashsubset {
575: my ($hash,$keyre) = @_;
576: my $resultkey;
577: foreach $resultkey (sort keys %$hash) {
578: if ($resultkey !~ /$keyre/) { next; }
579: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
580: &Apache::lonxml::debug("$resultkey ---- ".
581: &showarray($$hash{$resultkey}));
582: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
583: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
584: &showhashsubset($$hash{$resultkey},'.');
585: } else {
586: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
587: }
588: }
589: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
590: return '';
591: }
592:
593: sub setuppermissions {
594: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
595: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
596: if (! $viewgrades &&
597: exists($env{'request.course.sec'}) &&
598: $env{'request.course.sec'} !~ /^\s*$/) {
599: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
600: '/'.$env{'request.course.sec'});
601: }
602: $Apache::lonhomework::viewgrades = $viewgrades;
603:
604: if ($Apache::lonhomework::browse eq 'F' &&
605: $env{'form.devalidatecourseresdata'} eq 'on') {
606: my (undef,$courseid) = &Apache::lonxml::whichuser();
607: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
608: $env{"course.$courseid.domain"});
609: }
610:
611: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
612: if (! $modifygrades &&
613: exists($env{'request.course.sec'}) &&
614: $env{'request.course.sec'} !~ /^\s*$/) {
615: $modifygrades =
616: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
617: '/'.$env{'request.course.sec'});
618: }
619: $Apache::lonhomework::modifygrades = $modifygrades;
620:
621: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
622: if (! $queuegrade &&
623: exists($env{'request.course.sec'}) &&
624: $env{'request.course.sec'} !~ /^\s*$/) {
625: $queuegrade =
626: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
627: '/'.$env{'request.course.sec'});
628: }
629: $Apache::lonhomework::queuegrade = $queuegrade;
630: return '';
631: }
632:
633: sub unset_permissions {
634: undef($Apache::lonhomework::queuegrade);
635: undef($Apache::lonhomework::modifygrades);
636: undef($Apache::lonhomework::viewgrades);
637: undef($Apache::lonhomework::browse);
638: }
639:
640: sub setupheader {
641: my $request=$_[0];
642: &Apache::loncommon::content_type($request,'text/html');
643: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
644: &Apache::loncommon::no_cache($request);
645: }
646: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
647: # 'lastrevisiondate'));
648: $request->send_http_header;
649: return OK if $request->header_only;
650: return ''
651: }
652:
653: sub handle_save_or_undo {
654: my ($request,$problem,$result) = @_;
655: my $file = &Apache::lonnet::filelocation("",$request->uri);
656: my $filebak =$file.".bak";
657: my $filetmp =$file.".tmp";
658: my $error=0;
659:
660: &Apache::lonnet::correct_line_ends($result);
661:
662: if ($env{'form.Undo'} eq &mt('undo')) {
663: my $error=0;
664: if (!copy($file,$filetmp)) { $error=1; }
665: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
666: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
667: if (!$error) {
668: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
669: } else {
670: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
671: $error=1;
672: }
673: } else {
674: my $fs=Apache::File->new(">$filebak");
675: if (defined($fs)) {
676: print $fs $$problem;
677: &Apache::lonxml::info("<b>".&mt("Making Backup to").
678: " $filebak</b>");
679: } else {
680: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
681: $error=2;
682: }
683: my $fh=Apache::File->new(">$file");
684: if (defined($fh)) {
685: print $fh $$result;
686: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
687: " $file</b>");
688: } else {
689: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
690: &mt("Unable to write to")." $file</b></font>");
691: $error|=4;
692: }
693: }
694: return $error;
695: }
696:
697: sub analyze_header {
698: my ($request) = @_;
699: my $result =
700: &Apache::loncommon::start_page('Analyzing a problem',undef);
701:
702: $result .=
703: &Apache::lonxml::message_location().'
704: <form name="lonhomework" method="POST" action="'.
705: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
706: &Apache::structuretags::remember_problem_state().'
707: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
708: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
709: <hr />
710: <input type="submit" name="submit" value="'.&mt("View").'" />
711: <hr />
712: </form>';
713: &Apache::lonxml::add_messages(\$result);
714: $request->print($result);
715: $request->rflush();
716: }
717:
718: sub analyze_footer {
719: my ($request) = @_;
720: $request->print(&Apache::loncommon::end_page());
721: $request->rflush();
722: }
723:
724: sub analyze {
725: my ($request,$file) = @_;
726: &Apache::lonxml::debug("Analyze");
727: my $result;
728: my %overall;
729: my %seedexample;
730: my %allparts;
731: my $rndseed=$env{'form.rndseed'};
732: &analyze_header($request);
733: my %prog_state=
734: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
735: &mt('Getting Problem Variants'),
736: $env{'form.numtoanalyze'},
737: 'inline',undef);
738: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
739: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
740: &mt('last problem'));
741: if (&Apache::loncommon::connection_aborted($request)) { return; }
742: my $thisseed=$i+$rndseed;
743: my $subresult=&Apache::lonnet::ssi($request->uri,
744: ('grade_target' => 'analyze'),
745: ('rndseed' => $thisseed));
746: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
747: my %analyze=&Apache::lonnet::str2hash($subresult);
748: my @parts;
749: if (defined(@{ $analyze{'parts'} })) {
750: @parts=@{ $analyze{'parts'} };
751: }
752: foreach my $part (@parts) {
753: if (!exists($allparts{$part})) {$allparts{$part}=1;};
754: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
755: $analyze{$part.'.type'} eq 'stringresponse' ||
756: $analyze{$part.'.type'} eq 'formularesponse' ) {
757: my $concatanswer=join("\0",@{ $analyze{$part.'.answer'} });
758: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
759: @{$analyze{$part.'.answer'}}=('<font color="red">'.&mt('Error').'</font>');
760: }
761: push( @{ $overall{$part.'.answer'} },
762: [@{ $analyze{$part.'.answer'} }]);
763: $seedexample{join("\0",@{ $analyze{$part.'.answer'}})}=$thisseed;
764: }
765: }
766: }
767: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
768: &mt('Analyzing Results'));
769: $request->print('<hr />'.&mt('List of possible answers').': ');
770: foreach my $part (sort(keys(%allparts))) {
771: if (defined(@{ $overall{$part.'.answer'} })) {
772: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
773: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
774: my %frequency;
775: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
776: $frequency{join("\0",@{ $answer })}++;
777: }
778: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
779: .&mt('click for example').')</th></tr>');
780: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
781: $request->print('<tr><td class="center">'.
782: join('</td><td class="center">',split("\0",$answer)).
783: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{$answer}.'">'.$frequency{$answer}.
784: '</a></td></tr>');
785: }
786: $request->print('</table>');
787: } else {
788: $request->print('<p>'.&mt('Response').' '.$part.' '.
789: &mt('is not analyzable at this time').'</p>');
790: }
791: }
792: if (scalar(keys(%allparts)) == 0 ) {
793: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
794: }
795: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
796: &analyze_footer($request);
797: &Apache::lonhomework::showhash(%overall);
798: return $result;
799: }
800:
801: sub editxmlmode {
802: my ($request,$file) = @_;
803: my $result;
804: my $problem=&Apache::lonnet::getfile($file);
805: if ($problem eq -1) {
806: &Apache::lonxml::error("<b> ".&mt('Unable to find').
807: " <i>$file</i></b>");
808: $problem='';
809: }
810: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
811: my $error=&handle_save_or_undo($request,\$problem,
812: \$env{'form.editxmltext'});
813: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
814: }
815: &Apache::lonhomework::showhashsubset(\%env,'^form');
816: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
817: &Apache::lonhomework::showhashsubset(\%env,'^form');
818: $env{'form.problemmode'}='View';
819: &renderpage($request,$file);
820: } else {
821: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
822: my $xml_help = '<table><tr><td>'.
823: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
824: "Problem Editing Help").
825: '</td><td>'.
826: &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
827: '</td></tr></table>';
828: if ($cols > 80) { $cols = 80; }
829: if ($cols < 70) { $cols = 70; }
830: if ($rows < 20) { $rows = 20; }
831: my $start_page =
832: &Apache::loncommon::start_page("EditXML $file",
833: &Apache::edit::js_change_detection());
834:
835: $result.=$start_page.
836: &renderpage($request,$file,['no_output_web'],1).
837: &Apache::lonxml::message_location().'
838: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
839: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
840: &Apache::structuretags::remember_problem_state().'
841: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
842: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
843: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
844: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
845: <hr />
846: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
847: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
848: <hr />
849: ' . $xml_help . '
850: <textarea '.&Apache::edit::element_change_detection().' style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
851: &HTML::Entities::encode($problem,'<>&"').'</textarea><br />
852: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
853: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
854: </form>'.&Apache::loncommon::end_page();
855: &Apache::lonxml::add_messages(\$result);
856: $request->print($result);
857: }
858: return '';
859: }
860:
861: #
862: # Render the page in whatever target desired.
863: #
864: sub renderpage {
865: my ($request,$file,$targets,$return_string) = @_;
866:
867: my @targets = @{$targets || [&get_target()]};
868: &Apache::lonhomework::showhashsubset(\%env,'form.');
869: &Apache::lonxml::debug("Running targets ".join(':',@targets));
870: my $overall_result;
871: foreach my $target (@targets) {
872: # FIXME need to do something intelligent when a problem goes
873: # from viewable to not viewable due to map conditions
874: #&setuppermissions();
875: #if ( $Apache::lonhomework::browse ne '2'
876: # && $Apache::lonhomework::browse ne 'F' ) {
877: # $request->print(" You most likely shouldn't see me.");
878: #}
879: #my $t0 = [&gettimeofday()];
880: my $output=1;
881: if ($target eq 'no_output_web') {
882: $target = 'web'; $output=0;
883: }
884: my $problem=&Apache::lonnet::getfile($file);
885: my $result;
886: if ($problem eq -1) {
887: my $filename=(split('/',$file))[-1];
888: $result.="<b> ".&mt('Unable to find')." <i>$filename</i></b>";
889: $problem='';
890: }
891:
892: my %mystyle;
893: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
894: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
895: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
896:
897: &Apache::lonxml::debug("Should be parsing now");
898: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
899: &setup_vars($target),%mystyle);
900: undef($Apache::lonhomework::parsing_a_problem);
901: if (!$output) { $result = ''; }
902: #$request->print("Result follows:");
903: if ($target eq 'modified') {
904: &handle_save_or_undo($request,\$problem,\$result);
905: } else {
906: if ($target eq 'analyze') {
907: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
908: undef(%Apache::lonhomework::analyze);
909: }
910: #my $td=&tv_interval($t0);
911: #if ( $Apache::lonxml::debug) {
912: #$result =~ s:</body>::;
913: #$result.="<br />Spent $td seconds processing target $target\n</body>";
914: #}
915: # $request->print($result);
916: $overall_result.=$result;
917: # $request->rflush();
918: }
919: #$request->print(":Result ends");
920: #my $td=&tv_interval($t0);
921: }
922: if (!$return_string) {
923: &Apache::lonxml::add_messages(\$overall_result);
924: $request->print($overall_result);
925: $request->rflush();
926: } else {
927: return $overall_result;
928: }
929: }
930:
931: # with no arg it returns a HTML <option> list of the template titles
932: # with one arg it returns the filename associated with the arg passed
933: sub get_template_list {
934: my ($namewanted,$extension) = @_;
935: my $result;
936: my @allnames;
937: &Apache::lonxml::debug("Looking for :$extension:");
938: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
939: my $name=&Apache::lonnet::metadata($file,'title');
940: if ($namewanted && ($name eq $namewanted)) {
941: $result=$file;
942: last;
943: } else {
944: if ($name) { push (@allnames, $name); }
945: }
946: }
947: if (@allnames && !$result) {
948: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
949: join('</option><option>',sort(@allnames)).'</option>';
950: }
951: return $result;
952: }
953:
954: sub newproblem {
955: my ($request) = @_;
956: my $extension=$request->uri;
957: $extension=~s:^.*\.([\w]+)$:$1:;
958: &Apache::lonxml::debug("Looking for :$extension:");
959: my $templatelist=&get_template_list('',$extension);
960: if ($env{'form.template'} &&
961: $env{'form.template'} ne "Select a $extension template") {
962: use File::Copy;
963: my $file = &get_template_list($env{'form.template'},$extension);
964: my $dest = &Apache::lonnet::filelocation("",$request->uri);
965: copy($file,$dest);
966: &renderpage($request,$dest);
967: } elsif($env{'form.newfile'} && !$templatelist) {
968: # I don't like hard-coded filenames but for now, this will work.
969: use File::Copy;
970: my $templatefilename =
971: $request->dir_config('lonIncludes').'/templates/blank.problem';
972: &Apache::lonxml::debug("$templatefilename");
973: my $dest = &Apache::lonnet::filelocation("",$request->uri);
974: copy($templatefilename,$dest);
975: &renderpage($request,$dest);
976: } else {
977: my $url=&HTML::Entities::encode($request->uri,'<>&"');
978: my $shownurl=$url;
979: $shownurl=~s-^/~-/priv/-;
980: my $dest = &Apache::lonnet::filelocation("",$request->uri);
981: my $errormsg;
982: if ($env{'form.newfile'}) {
983: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
984: }
985: my $instructions;
986: my $start_page =
987: &Apache::loncommon::start_page("Create New $extension");
988: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
989: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
990: 'resource' => 'resource',
991: 'requested' => 'The requested file',
992: 'not exist' => 'currently does not exist',
993: 'createnew' => 'To create a new',
994: 'click' => 'click on the',
995: 'Create' => 'Create',
996: 'button' => 'button');
997: $request->print(<<ENDNEWPROBLEM);
998: $start_page
999: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1000: $errormsg
1001: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1002: <p>
1003: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1004: </p>
1005: <p><form action="$url" method="POST">
1006: ENDNEWPROBLEM
1007: if (defined($templatelist)) {
1008: $request->print("<select name=\"template\">$templatelist</select>");
1009: }
1010: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1011: $request->print("</form></p>".&Apache::loncommon::end_page());
1012: }
1013: return '';
1014: }
1015:
1016: sub handler {
1017: #my $t0 = [&gettimeofday()];
1018: my $request=$_[0];
1019: $Apache::lonxml::request=$request;
1020: $Apache::lonxml::debug=$env{'user.debug'};
1021: $env{'request.uri'}=$request->uri;
1022: &setuppermissions();
1023: # some times multiple problemmodes are submitted, need to select
1024: # the last one
1025: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
1026: my $mode=$env{'form.problemmode'}->[-1];
1027: undef $env{'form.problemmode'};
1028: $env{'form.problemmode'}=$mode;
1029: }
1030:
1031: my $file=&Apache::lonnet::filelocation("",$request->uri);
1032:
1033: #check if we know where we are
1034: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1035: # if we are browsing we might not be able to know where we are
1036: if ($Apache::lonhomework::browse ne 'F' &&
1037: $env{'request.state'} ne "construct") {
1038: #should know where we are, so ask
1039: &unset_permissions();
1040: $request->internal_redirect('/adm/ambiguous');
1041: return OK;
1042: }
1043: }
1044: if (&setupheader($request)) {
1045: &unset_permissions();
1046: return OK;
1047: }
1048: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1049: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1050: my ($symb) = &Apache::lonxml::whichuser();
1051: &Apache::lonxml::debug('symb is '.$symb);
1052: if ($env{'request.state'} eq "construct") {
1053: if ( -e $file ) {
1054: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1055: ['problemmode']);
1056: if (!(defined $env{'form.problemmode'})) {
1057: #first visit to problem in construction space
1058: $env{'form.problemmode'}='View';
1059: &renderpage($request,$file);
1060: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
1061: $env{'form.problemmode'} eq 'EditXML') {
1062: &editxmlmode($request,$file);
1063: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1064: &analyze($request,$file);
1065: } else {
1066: &renderpage($request,$file);
1067: }
1068: } else {
1069: # requested file doesn't exist in contruction space
1070: &newproblem($request);
1071: }
1072: } else {
1073: # just render the page normally outside of construction space
1074: &Apache::lonxml::debug("not construct");
1075: &renderpage($request,$file);
1076: }
1077: #my $td=&tv_interval($t0);
1078: #&Apache::lonxml::debug("Spent $td seconds processing");
1079: # always turn off debug messages
1080: $Apache::lonxml::debug=0;
1081: &unset_permissions();
1082: return OK;
1083:
1084: }
1085:
1086: 1;
1087: __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