1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.240 2006/04/13 19:01:40 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 ($env{'form.grade_target'});
89: }
90: if ($env{'form.webgrade'} &&
91: $Apache::lonhomework::modifygrades eq 'F') {
92: return ('grade','webgrade');
93: }
94: if ( defined($env{'form.submitted'}) &&
95: ( !defined($env{'form.resetdata'})) &&
96: ( !defined($env{'form.newrandomization'}))) {
97: return ('grade', 'web');
98: } else {
99: return ('web');
100: }
101: } elsif ($env{'request.state'} eq "construct") {
102: if ( defined($env{'form.grade_target'}) ) {
103: return ($env{'form.grade_target'});
104: }
105: if ( defined($env{'form.preview'})) {
106: if ( defined($env{'form.submitted'})) {
107: return ('grade', 'web');
108: } else {
109: return ('web');
110: }
111: } else {
112: if ( $env{'form.problemmode'} eq &mt('View') ||
113: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
114: if ( defined($env{'form.submitted'}) &&
115: (!defined($env{'form.resetdata'})) &&
116: (!defined($env{'form.newrandomization'}))) {
117: return ('grade', 'web','answer');
118: } else {
119: return ('web','answer');
120: }
121: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
122: $env{'form.problemmode'} eq 'Edit') {
123: if ( $env{'form.submitted'} eq 'edit' ) {
124: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
125: return ('modified','web','answer');
126: } else {
127: return ('modified','no_output_web','edit');
128: }
129: } else {
130: return ('no_output_web','edit');
131: }
132: } else {
133: return ('web');
134: }
135: }
136: }
137: return ();
138: }
139:
140: sub setup_vars {
141: my ($target) = @_;
142: return ';'
143: # return ';$external::target='.$target.';';
144: }
145:
146: sub createmenu {
147: my ($which,$request)=@_;
148: if ($which eq 'grade') {
149: $request->print('<script language="JavaScript">
150: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
151: "height=350,width=150,menubar=no");
152: </script>');
153: }
154: }
155:
156: sub proctor_checked_in {
157: my ($slot_name,$slot,$type)=@_;
158: my @possible_proctors=split(",",$slot->{'proctor'});
159:
160: my $key;
161: if ($type eq 'Task') {
162: my $version=$Apache::lonhomework::history{'resource.0.version'};
163: $key ="resource.$version.0.checkedin";
164: } elsif ($type eq 'problem') {
165: $key ='resource.0.checkedin';
166: }
167:
168: foreach my $possible (@possible_proctors) {
169: if ($Apache::lonhomework::history{$key} eq $possible
170: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
171: return 1;
172: }
173: }
174:
175: return 0;
176: }
177:
178: $Apache::lonxml::browse='';
179: sub check_ip_acc {
180: my ($acc)=@_;
181: &Apache::lonxml::debug("acc is $acc");
182: if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
183: return 1;
184: }
185: my $allowed=0;
186: my $ip=$ENV{'REMOTE_ADDR'};
187: my $name;
188: foreach my $pattern (split(',',$acc)) {
189: $pattern =~ s/^\s*//;
190: $pattern =~ s/\s*$//;
191: if ($pattern =~ /\*$/) {
192: #35.8.*
193: $pattern=~s/\*//;
194: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
195: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
196: #35.8.3.[34-56]
197: my $low=$2;
198: my $high=$3;
199: $pattern=$1;
200: if ($ip =~ /^\Q$pattern\E/) {
201: my $last=(split(/\./,$ip))[3];
202: if ($last <=$high && $last >=$low) { $allowed=1; }
203: }
204: } elsif ($pattern =~ /^\*/) {
205: #*.msu.edu
206: $pattern=~s/\*//;
207: if (!defined($name)) {
208: use Socket;
209: my $netaddr=inet_aton($ip);
210: ($name)=gethostbyaddr($netaddr,AF_INET);
211: }
212: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
213: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
214: #127.0.0.1
215: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
216: } else {
217: #some.name.com
218: if (!defined($name)) {
219: use Socket;
220: my $netaddr=inet_aton($ip);
221: ($name)=gethostbyaddr($netaddr,AF_INET);
222: }
223: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
224: }
225: if ($allowed) { last; }
226: }
227: return $allowed;
228: }
229:
230: sub check_slot_access {
231: my ($id,$type)=@_;
232:
233: # does it pass normal muster
234: my ($status,$datemsg)=&check_access($id);
235:
236: my $useslots = &Apache::lonnet::EXT("resource.$id.useslots");
237: if ($useslots ne 'resource') {
238: return ($status,$datemsg);
239: }
240:
241: if ($status eq 'SHOW_ANSWER' ||
242: $status eq 'CLOSED' ||
243: $status eq 'INVALID_ACCESS' ||
244: $status eq 'UNAVAILABLE') {
245: return ($status,$datemsg);
246: }
247: if ($env{'request.state'} eq "construct") {
248: return ($status,$datemsg);
249: }
250:
251: if ($type eq 'Task') {
252: my $version=$Apache::lonhomework::history{'resource.version'};
253: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
254: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
255: return ('SHOW_ANSWER');
256: }
257: }
258:
259: my @slots=
260: (split(':',&Apache::lonnet::EXT("resource.$id.availablestudent")),
261: split(':',&Apache::lonnet::EXT("resource.$id.available")));
262:
263: # if (!@slots) {
264: # return ($status,$datemsg);
265: # }
266: my $slotstatus='NOT_IN_A_SLOT';
267: my ($returned_slot,$slot_name);
268: foreach my $slot (@slots) {
269: &Apache::lonxml::debug("getting $slot");
270: my %slot=&Apache::lonnet::get_slot($slot);
271: &Apache::lonhomework::showhash(%slot);
272: if ($slot{'starttime'} < time &&
273: $slot{'endtime'} > time &&
274: &check_ip_acc($slot{'ip'})) {
275: &Apache::lonxml::debug("$slot is good");
276: $slotstatus='NEEDS_CHECKIN';
277: $returned_slot=\%slot;
278: $slot_name=$slot;
279: last;
280: }
281: }
282: if ($slotstatus eq 'NEEDS_CHECKIN' &&
283: &proctor_checked_in($slot_name,$returned_slot,$type)) {
284: &Apache::lonxml::debug("protoctor checked in");
285: $slotstatus='CAN_ANSWER';
286: }
287:
288: my ($is_correct,$got_grade,$checkedin);
289: if ($type eq 'Task') {
290: my $version=$Apache::lonhomework::history{'resource.0.version'};
291: $got_grade =
292: ($Apache::lonhomework::history{"resource.$version.0.status"}
293: =~ /^(?:pass|fail)$/);
294: $is_correct =
295: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
296: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
297: $checkedin =
298: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
299: } elsif ($type eq 'problem') {
300: $got_grade = 1;
301: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
302: }
303:
304: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
305:
306: # has a current checked in recrd, but hasn't got a grade, must be awaiting
307: # a grade
308: if ($checkedin
309: && !$got_grade) {
310: return ('WAITING_FOR_GRADE');
311: }
312:
313: if ($slotstatus eq 'NOT_IN_A_SLOT'
314: && $checkedin ) {
315:
316: if ($got_grade) {
317: return ('SHOW_ANSWER');
318: } else {
319: return ('WAITING_FOR_GRADE');
320: }
321:
322: }
323: if ( $is_correct) {
324: return ('SHOW_ANSWER');
325: }
326: if ( $status eq 'CANNOT_ANSWER' &&
327: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
328: return ($status,$datemsg);
329: }
330:
331: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
332: }
333:
334: # JB, 9/24/2002: Any changes in this function may require a change
335: # in lonnavmaps::resource::getDateStatus.
336: sub check_access {
337: my ($id) = @_;
338: my $date ='';
339: my $status;
340: my $datemsg = '';
341: my $lastdate = '';
342: my $type;
343: my $passed;
344:
345: if ($env{'request.state'} eq "construct") {
346: if ($env{'form.problemstate'}) {
347: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
348: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
349: lc($Apache::lonhomework::problemstatus) eq 'no')) {
350: return ('CANNOT_ANSWER',
351: &mt('is in this state due to author settings.'));
352: }
353: } else {
354: return ($env{'form.problemstate'},
355: &mt('is in this state due to author settings.'));
356: }
357: }
358: &Apache::lonxml::debug("in construction ignoring dates");
359: $status='CAN_ANSWER';
360: $datemsg=&mt('is in under construction');
361: # return ($status,$datemsg);
362: }
363:
364: &Apache::lonxml::debug("checking for part :$id:");
365: &Apache::lonxml::debug("time:".time);
366:
367: my ($symb)=&Apache::lonxml::whichuser();
368: &Apache::lonxml::debug("symb:".$symb);
369: #if ($env{'request.state'} ne "construct" && $symb ne '') {
370: if ($env{'request.state'} ne "construct") {
371: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
372: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
373: $status='INVALID_ACCESS';
374: $date=&mt("can not be accessed from your location.");
375: return($status,$date);
376: }
377:
378: foreach my $temp ("opendate","duedate","answerdate") {
379: $lastdate = $date;
380: $date = &Apache::lonnet::EXT("resource.$id.$temp");
381: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
382: if ($thistype =~ /^(con_lost|no_such_host)/ ||
383: $date =~ /^(con_lost|no_such_host)/) {
384: $status='UNAVAILABLE';
385: $date=&mt("may open later.");
386: return($status,$date);
387: }
388: if ($thistype eq 'date_interval') {
389: if ($temp eq 'opendate') {
390: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
391: }
392: if ($temp eq 'answerdate') {
393: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
394: }
395: }
396: &Apache::lonxml::debug("found :$date: for :$temp:");
397: if ($date eq '') {
398: $date = &mt("an unknown date"); $passed = 0;
399: } elsif ($date eq 'con_lost') {
400: $date = &mt("an indeterminate date"); $passed = 0;
401: } else {
402: if (time < $date) { $passed = 0; } else { $passed = 1; }
403: $date = localtime $date;
404: }
405: if (!$passed) { $type=$temp; last; }
406: }
407: &Apache::lonxml::debug("have :$type:$passed:");
408: if ($passed) {
409: $status='SHOW_ANSWER';
410: $datemsg=$date;
411: } elsif ($type eq 'opendate') {
412: $status='CLOSED';
413: $datemsg = &mt("will open on")." $date";
414: } elsif ($type eq 'duedate') {
415: $status='CAN_ANSWER';
416: $datemsg = &mt("is due at")." $date";
417: } elsif ($type eq 'answerdate') {
418: $status='CLOSED';
419: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
420: }
421: }
422: if ($status eq 'CAN_ANSWER' ||
423: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
424: #check #tries, and if correct.
425: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
426: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
427: if ( $tries eq '' ) { $tries = '0'; }
428: if ( $maxtries eq '' &&
429: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
430: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
431: # if (correct and show prob status) or excused then CANNOT_ANSWER
432: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
433: &&
434: lc($Apache::lonhomework::problemstatus) ne 'no')
435: ||
436: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
437: $status = 'CANNOT_ANSWER';
438: }
439: }
440: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
441: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
442: &Apache::lonxml::debug("looking for interval $interval");
443: if ($interval) {
444: my $first_access=&Apache::lonnet::get_first_access('map');
445: &Apache::lonxml::debug("looking for accesstime $first_access");
446: if (!$first_access) {
447: $status='NOT_YET_VIEWED';
448: $datemsg=&seconds_to_human_length($interval);
449: } else {
450: my $newdate=localtime($first_access+$interval);
451: if (time > ($first_access+$interval)) {
452: $status='CLOSED';
453: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
454: } else {
455: $datemsg = &mt("is due at")." $newdate";
456: }
457: }
458: }
459: }
460: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
461: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
462: # return ('UNCHECKEDOUT','needs to be checked out');
463: #}
464:
465:
466: &Apache::lonxml::debug("sending back :$status:$datemsg:");
467: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
468: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
469: $status='CAN_ANSWER';
470: $datemsg=&mt('is closed but you are allowed to view it');
471: }
472:
473: return ($status,$datemsg);
474: }
475:
476: sub seconds_to_human_length {
477: my ($length)=@_;
478:
479: my $seconds=$length%60; $length=int($length/60);
480: my $minutes=$length%60; $length=int($length/60);
481: my $hours=$length%24; $length=int($length/24);
482: my $days=$length;
483:
484: my $timestr;
485: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
486: if ($hours > 0) { $timestr.=($timestr?", ":"").
487: &mt('[quant,_1,hour]',$hours); }
488: if ($minutes > 0) { $timestr.=($timestr?", ":"").
489: &mt('[quant,_1,minute]',$minutes); }
490: if ($seconds > 0) { $timestr.=($timestr?", ":"").
491: &mt('[quant,_1,second]',$seconds); }
492: return $timestr;
493: }
494:
495: sub showhash {
496: my (%hash) = @_;
497: &showhashsubset(\%hash,'.');
498: return '';
499: }
500:
501: sub showarray {
502: my ($array)=@_;
503: my $string="(";
504: foreach my $elm (@{ $array }) {
505: if (ref($elm) eq 'ARRAY') {
506: $string.=&showarray($elm);
507: } elsif (ref($elm) eq 'HASH') {
508: $string.= "HASH --- \n<br />";
509: $string.= &showhashsubset($elm,'.');
510: } else {
511: $string.="$elm,"
512: }
513: }
514: chop($string);
515: $string.=")";
516: return $string;
517: }
518:
519: sub showhashsubset {
520: my ($hash,$keyre) = @_;
521: my $resultkey;
522: foreach $resultkey (sort keys %$hash) {
523: if ($resultkey !~ /$keyre/) { next; }
524: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
525: &Apache::lonxml::debug("$resultkey ---- ".
526: &showarray($$hash{$resultkey}));
527: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
528: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
529: &showhashsubset($$hash{$resultkey},'.');
530: } else {
531: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
532: }
533: }
534: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
535: return '';
536: }
537:
538: sub setuppermissions {
539: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
540: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
541: if (! $viewgrades &&
542: exists($env{'request.course.sec'}) &&
543: $env{'request.course.sec'} !~ /^\s*$/) {
544: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
545: '/'.$env{'request.course.sec'});
546: }
547: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
548: if ($Apache::lonhomework::browse eq 'F' &&
549: $env{'form.devalidatecourseresdata'} eq 'on') {
550: my (undef,$courseid) = &Apache::lonxml::whichuser();
551: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
552: $env{"course.$courseid.domain"});
553: }
554: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
555: if (! $modifygrades &&
556: exists($env{'request.course.sec'}) &&
557: $env{'request.course.sec'} !~ /^\s*$/) {
558: $modifygrades =
559: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
560: '/'.$env{'request.course.sec'});
561: }
562: $Apache::lonhomework::modifygrades = $modifygrades;
563: return '';
564: }
565:
566: sub setupheader {
567: my $request=$_[0];
568: &Apache::loncommon::content_type($request,'text/html');
569: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
570: &Apache::loncommon::no_cache($request);
571: }
572: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
573: # 'lastrevisiondate'));
574: $request->send_http_header;
575: return OK if $request->header_only;
576: return ''
577: }
578:
579: sub handle_save_or_undo {
580: my ($request,$problem,$result) = @_;
581: my $file = &Apache::lonnet::filelocation("",$request->uri);
582: my $filebak =$file.".bak";
583: my $filetmp =$file.".tmp";
584: my $error=0;
585:
586: &Apache::lonnet::correct_line_ends($result);
587:
588: if ($env{'form.Undo'} eq &mt('undo')) {
589: my $error=0;
590: if (!copy($file,$filetmp)) { $error=1; }
591: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
592: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
593: if (!$error) {
594: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
595: } else {
596: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
597: $error=1;
598: }
599: } else {
600: my $fs=Apache::File->new(">$filebak");
601: if (defined($fs)) {
602: print $fs $$problem;
603: &Apache::lonxml::info("<b>".&mt("Making Backup to").
604: " $filebak</b>");
605: } else {
606: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
607: $error=2;
608: }
609: my $fh=Apache::File->new(">$file");
610: if (defined($fh)) {
611: print $fh $$result;
612: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
613: " $file</b>");
614: } else {
615: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
616: &mt("Unable to write to")." $file</b></font>");
617: $error|=4;
618: }
619: }
620: return $error;
621: }
622:
623: sub analyze_header {
624: my ($request) = @_;
625: my $result =
626: &Apache::loncommon::start_page('Analyzing a problem',undef);
627:
628: $result .=
629: &Apache::lonxml::message_location().'
630: <form name="lonhomework" method="POST" action="'.
631: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
632: &Apache::structuretags::remember_problem_state().'
633: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
634: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
635: <hr />
636: <input type="submit" name="submit" value="'.&mt("View").'" />
637: <hr />
638: </form>';
639: &Apache::lonxml::add_messages(\$result);
640: $request->print($result);
641: $request->rflush();
642: }
643:
644: sub analyze_footer {
645: my ($request) = @_;
646: $request->print(&Apache::loncommon::end_page());
647: $request->rflush();
648: }
649:
650: sub analyze {
651: my ($request,$file) = @_;
652: &Apache::lonxml::debug("Analyze");
653: my $result;
654: my %overall;
655: my %seedexample;
656: my %allparts;
657: my $rndseed=$env{'form.rndseed'};
658: &analyze_header($request);
659: my %prog_state=
660: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
661: &mt('Getting Problem Variants'),
662: $env{'form.numtoanalyze'},
663: 'inline',undef);
664: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
665: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
666: &mt('last problem'));
667: if (&Apache::loncommon::connection_aborted($request)) { return; }
668: my $thisseed=$i+$rndseed;
669: my $subresult=&Apache::lonnet::ssi($request->uri,
670: ('grade_target' => 'analyze'),
671: ('rndseed' => $thisseed));
672: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
673: my %analyze=&Apache::lonnet::str2hash($subresult);
674: my @parts;
675: if (defined(@{ $analyze{'parts'} })) {
676: @parts=@{ $analyze{'parts'} };
677: }
678: foreach my $part (@parts) {
679: if (!exists($allparts{$part})) {$allparts{$part}=1;};
680: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
681: $analyze{$part.'.type'} eq 'stringresponse' ||
682: $analyze{$part.'.type'} eq 'formularesponse' ) {
683: my $concatanswer=join("\0",@{ $analyze{$part.'.answer'} });
684: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
685: @{$analyze{$part.'.answer'}}=('<font color="red">'.&mt('Error').'</font>');
686: }
687: push( @{ $overall{$part.'.answer'} },
688: [@{ $analyze{$part.'.answer'} }]);
689: $seedexample{join("\0",@{ $analyze{$part.'.answer'}})}=$thisseed;
690: }
691: }
692: }
693: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
694: &mt('Analyzing Results'));
695: $request->print('<hr />'.&mt('List of possible answers').': ');
696: foreach my $part (sort(keys(%allparts))) {
697: if (defined(@{ $overall{$part.'.answer'} })) {
698: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
699: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
700: my %frequency;
701: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
702: $frequency{join("\0",@{ $answer })}++;
703: }
704: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
705: .&mt('click for example').')</th></tr>');
706: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
707: $request->print('<tr><td class="center">'.
708: join('</td><td class="center">',split("\0",$answer)).
709: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{$answer}.'">'.$frequency{$answer}.
710: '</a></td></tr>');
711: }
712: $request->print('</table>');
713: } else {
714: $request->print('<p>'.&mt('Response').' '.$part.' '.
715: &mt('is not analyzable at this time').'</p>');
716: }
717: }
718: if (scalar(keys(%allparts)) == 0 ) {
719: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
720: }
721: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
722: &analyze_footer($request);
723: &Apache::lonhomework::showhash(%overall);
724: return $result;
725: }
726:
727: sub editxmlmode {
728: my ($request,$file) = @_;
729: my $result;
730: my $problem=&Apache::lonnet::getfile($file);
731: if ($problem eq -1) {
732: &Apache::lonxml::error("<b> ".&mt('Unable to find').
733: " <i>$file</i></b>");
734: $problem='';
735: }
736: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
737: my $error=&handle_save_or_undo($request,\$problem,
738: \$env{'form.editxmltext'});
739: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
740: }
741: &Apache::lonhomework::showhashsubset(\%env,'^form');
742: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
743: &Apache::lonhomework::showhashsubset(\%env,'^form');
744: $env{'form.problemmode'}='View';
745: &renderpage($request,$file);
746: } else {
747: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
748: my $xml_help = '<table><tr><td>'.
749: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
750: "Problem Editing Help").
751: '</td><td>'.
752: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
753: '</td></tr></table>';
754: if ($cols > 80) { $cols = 80; }
755: if ($cols < 70) { $cols = 70; }
756: if ($rows < 20) { $rows = 20; }
757: my $start_page =
758: &Apache::loncommon::start_page("EditXML $file",
759: &Apache::edit::js_change_detection());
760:
761: $result.=$start_page.
762: &renderpage($request,$file,['no_output_web'],1).
763: &Apache::lonxml::message_location().'
764: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
765: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
766: &Apache::structuretags::remember_problem_state().'
767: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
768: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
769: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
770: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
771: <hr />
772: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
773: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
774: <hr />
775: ' . $xml_help . '
776: <textarea '.&Apache::edit::element_change_detection().' style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
777: &HTML::Entities::encode($problem,'<>&"').'</textarea><br />
778: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
779: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
780: </form>'.&Apache::loncommon::end_page();
781: &Apache::lonxml::add_messages(\$result);
782: $request->print($result);
783: }
784: return '';
785: }
786:
787: #
788: # Render the page in whatever target desired.
789: #
790: sub renderpage {
791: my ($request,$file,$targets,$return_string) = @_;
792:
793: my @targets = @{$targets || [&get_target()]};
794: &Apache::lonhomework::showhashsubset(\%env,'form.');
795: &Apache::lonxml::debug("Running targets ".join(':',@targets));
796: my $overall_result;
797: foreach my $target (@targets) {
798: # FIXME need to do something intelligent when a problem goes
799: # from viewable to not viewable due to map conditions
800: #&setuppermissions();
801: #if ( $Apache::lonhomework::browse ne '2'
802: # && $Apache::lonhomework::browse ne 'F' ) {
803: # $request->print(" You most likely shouldn't see me.");
804: #}
805: #my $t0 = [&gettimeofday()];
806: my $output=1;
807: if ($target eq 'no_output_web') {
808: $target = 'web'; $output=0;
809: }
810: my $problem=&Apache::lonnet::getfile($file);
811: my $result;
812: if ($problem eq -1) {
813: my $filename=(split('/',$file))[-1];
814: $result.="<b> ".&mt('Unable to find')." <i>$filename</i></b>";
815: $problem='';
816: }
817:
818: my %mystyle;
819: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
820: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
821: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
822:
823: &Apache::lonxml::debug("Should be parsing now");
824: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
825: &setup_vars($target),%mystyle);
826: undef($Apache::lonhomework::parsing_a_problem);
827: if (!$output) { $result = ''; }
828: #$request->print("Result follows:");
829: if ($target eq 'modified') {
830: &handle_save_or_undo($request,\$problem,\$result);
831: } else {
832: if ($target eq 'analyze') {
833: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
834: undef(%Apache::lonhomework::analyze);
835: }
836: #my $td=&tv_interval($t0);
837: #if ( $Apache::lonxml::debug) {
838: #$result =~ s:</body>::;
839: #$result.="<br />Spent $td seconds processing target $target\n</body>";
840: #}
841: # $request->print($result);
842: $overall_result.=$result;
843: # $request->rflush();
844: }
845: #$request->print(":Result ends");
846: #my $td=&tv_interval($t0);
847: }
848: if (!$return_string) {
849: &Apache::lonxml::add_messages(\$overall_result);
850: $request->print($overall_result);
851: $request->rflush();
852: } else {
853: return $overall_result;
854: }
855: }
856:
857: # with no arg it returns a HTML <option> list of the template titles
858: # with one arg it returns the filename associated with the arg passed
859: sub get_template_list {
860: my ($namewanted,$extension) = @_;
861: my $result;
862: my @allnames;
863: &Apache::lonxml::debug("Looking for :$extension:");
864: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
865: my $name=&Apache::lonnet::metadata($file,'title');
866: if ($namewanted && ($name eq $namewanted)) {
867: $result=$file;
868: last;
869: } else {
870: if ($name) { push (@allnames, $name); }
871: }
872: }
873: if (@allnames && !$result) {
874: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
875: join('</option><option>',sort(@allnames)).'</option>';
876: }
877: return $result;
878: }
879:
880: sub newproblem {
881: my ($request) = @_;
882: my $extension=$request->uri;
883: $extension=~s:^.*\.([\w]+)$:$1:;
884: &Apache::lonxml::debug("Looking for :$extension:");
885: my $templatelist=&get_template_list('',$extension);
886: if ($env{'form.template'} &&
887: $env{'form.template'} ne "Select a $extension template") {
888: use File::Copy;
889: my $file = &get_template_list($env{'form.template'},$extension);
890: my $dest = &Apache::lonnet::filelocation("",$request->uri);
891: copy($file,$dest);
892: &renderpage($request,$dest);
893: } elsif($env{'form.newfile'} && !$templatelist) {
894: # I don't like hard-coded filenames but for now, this will work.
895: use File::Copy;
896: my $templatefilename =
897: $request->dir_config('lonIncludes').'/templates/blank.problem';
898: &Apache::lonxml::debug("$templatefilename");
899: my $dest = &Apache::lonnet::filelocation("",$request->uri);
900: copy($templatefilename,$dest);
901: &renderpage($request,$dest);
902: } else {
903: my $url=&HTML::Entities::encode($request->uri,'<>&"');
904: my $shownurl=$url;
905: $shownurl=~s-^/~-/priv/-;
906: my $dest = &Apache::lonnet::filelocation("",$request->uri);
907: my $errormsg;
908: if ($env{'form.newfile'}) {
909: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
910: }
911: my $instructions;
912: my $start_page =
913: &Apache::loncommon::start_page("Create New $extension");
914: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
915: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
916: 'resource' => 'resource',
917: 'requested' => 'The requested file',
918: 'not exist' => 'currently does not exist',
919: 'createnew' => 'To create a new',
920: 'click' => 'click on the',
921: 'Create' => 'Create',
922: 'button' => 'button');
923: $request->print(<<ENDNEWPROBLEM);
924: $start_page
925: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
926: $errormsg
927: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
928: <p>
929: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
930: </p>
931: <p><form action="$url" method="POST">
932: ENDNEWPROBLEM
933: if (defined($templatelist)) {
934: $request->print("<select name=\"template\">$templatelist</select>");
935: }
936: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
937: $request->print("</form></p>".&Apache::loncommon::end_page());
938: }
939: return '';
940: }
941:
942: sub handler {
943: #my $t0 = [&gettimeofday()];
944: my $request=$_[0];
945: $Apache::lonxml::request=$request;
946: $Apache::lonxml::debug=$env{'user.debug'};
947: $env{'request.uri'}=$request->uri;
948: &setuppermissions();
949: # some times multiple problemmodes are submitted, need to select
950: # the last one
951: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
952: my $mode=$env{'form.problemmode'}->[-1];
953: undef $env{'form.problemmode'};
954: $env{'form.problemmode'}=$mode;
955: }
956:
957: my $file=&Apache::lonnet::filelocation("",$request->uri);
958:
959: #check if we know where we are
960: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
961: # if we are browsing we might not be able to know where we are
962: if ($Apache::lonhomework::browse ne 'F' &&
963: $env{'request.state'} ne "construct") {
964: #should know where we are, so ask
965: $request->internal_redirect('/adm/ambiguous'); return OK;
966: }
967: }
968: if (&setupheader($request)) { return OK; }
969: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
970: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
971: my ($symb) = &Apache::lonxml::whichuser();
972: &Apache::lonxml::debug('symb is '.$symb);
973: if ($env{'request.state'} eq "construct") {
974: if ( -e $file ) {
975: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
976: ['problemmode']);
977: if (!(defined $env{'form.problemmode'})) {
978: #first visit to problem in construction space
979: $env{'form.problemmode'}='View';
980: &renderpage($request,$file);
981: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
982: $env{'form.problemmode'} eq 'EditXML') {
983: &editxmlmode($request,$file);
984: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
985: &analyze($request,$file);
986: } else {
987: &renderpage($request,$file);
988: }
989: } else {
990: # requested file doesn't exist in contruction space
991: &newproblem($request);
992: }
993: } else {
994: # just render the page normally outside of construction space
995: &Apache::lonxml::debug("not construct");
996: &renderpage($request,$file);
997: }
998: #my $td=&tv_interval($t0);
999: #&Apache::lonxml::debug("Spent $td seconds processing");
1000: # always turn off debug messages
1001: $Apache::lonxml::debug=0;
1002: return OK;
1003:
1004: }
1005:
1006: 1;
1007: __END__
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