1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.302 2009/02/17 15:25:18 jms 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 Apache::loncommon();
53: use Apache::lonlocal;
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use HTML::Entities();
56: use File::Copy();
57:
58: # FIXME - improve commenting
59:
60:
61: BEGIN {
62: &Apache::lonxml::register_insert();
63: }
64:
65:
66: =pod
67:
68: =item set_bubble_lines()
69:
70: Called at analysis time to set the bubble lines
71: hash for the problem.. This should be called in the
72: end_problemtype tag in analysis mode.
73:
74: We fetch the hash of part id counters from lonxml
75: and push them into analyze:{part_id.bubble_lines}.
76:
77: =cut
78:
79: sub set_bubble_lines {
80: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
81:
82: foreach my $key (keys(%bubble_counters)) {
83: $Apache::lonhomework::analyze{"$key.bubble_lines"} =
84: $bubble_counters{"$key"};
85: }
86: }
87:
88: #
89: # Decides what targets to render for.
90: # Implicit inputs:
91: # Various session environment variables:
92: # request.state - published - is a /res/ resource
93: # uploaded - is a /uploaded/ resource
94: # contruct - is a /priv/ resource
95: # form.grade_target - a form parameter requesting a specific target
96: sub get_target {
97: &Apache::lonxml::debug("request.state = $env{'request.state'}");
98: if( defined($env{'form.grade_target'})) {
99: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
100: } else {
101: &Apache::lonxml::debug("form.grade_target <undefined>");
102: }
103: if (($env{'request.state'} eq "published") ||
104: ($env{'request.state'} eq "uploaded")) {
105: if ( defined($env{'form.grade_target'} )
106: && ($env{'form.grade_target'} eq 'tex')) {
107: return ($env{'form.grade_target'});
108: } elsif ( defined($env{'form.grade_target'} )
109: && ($Apache::lonhomework::viewgrades eq 'F' )) {
110: return ($env{'form.grade_target'});
111: } elsif ( $env{'form.grade_target'} eq 'webgrade'
112: && ($Apache::lonhomework::queuegrade eq 'F' )) {
113: return ($env{'form.grade_target'});
114: }
115: if ($env{'form.webgrade'} &&
116: ($Apache::lonhomework::modifygrades eq 'F'
117: || $Apache::lonhomework::queuegrade eq 'F' )) {
118: return ('grade','webgrade');
119: }
120: if ( defined($env{'form.submitted'}) &&
121: ( !defined($env{'form.newrandomization'}))) {
122: return ('grade', 'web');
123: } else {
124: return ('web');
125: }
126: } elsif ($env{'request.state'} eq "construct") {
127: if ( defined($env{'form.grade_target'}) ) {
128: return ($env{'form.grade_target'});
129: }
130: if ( defined($env{'form.preview'})) {
131: if ( defined($env{'form.submitted'})) {
132: return ('grade', 'web');
133: } else {
134: return ('web');
135: }
136: } else {
137: if ($env{'form.problemstate'} eq 'WEB_GRADE') {
138: #$env{'form.webgrade'} = 'yes';
139: return ('grade','webgrade','answer');
140: } elsif (($env{'form.problemmode'} eq 'view') ||
141: ($env{'form.problemmode'} eq 'discard')) {
142: if ( defined($env{'form.submitted'}) &&
143: (!defined($env{'form.resetdata'})) &&
144: (!defined($env{'form.newrandomization'}))) {
145: return ('grade', 'web','answer');
146: } else {
147: return ('web','answer');
148: }
149: } elsif ($env{'form.problemmode'} eq 'edit') {
150: if ( $env{'form.submitted'} eq 'edit' ) {
151: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
152: return ('modified','web','answer');
153: } else {
154: return ('modified','no_output_web','edit');
155: }
156: } else {
157: return ('no_output_web','edit');
158: }
159: } else {
160: return ('web');
161: }
162: }
163: }
164: return ();
165: }
166:
167: sub setup_vars {
168: my ($target) = @_;
169: return ';'
170: # return ';$external::target='.$target.';';
171: }
172:
173: sub createmenu {
174: my ($which,$request)=@_;
175: if ($which eq 'grade') {
176: $request->print('<script language="JavaScript">
177: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
178: "height=350,width=150,menubar=no");
179: </script>');
180: }
181: }
182:
183: sub proctor_checked_in {
184: my ($slot_name,$slot,$type)=@_;
185: my @possible_proctors=split(",",$slot->{'proctor'});
186:
187: return 1 if (!@possible_proctors);
188:
189: my $key;
190: if ($type eq 'Task') {
191: my $version=$Apache::lonhomework::history{'resource.0.version'};
192: $key ="resource.$version.0.checkedin";
193: } elsif ($type eq 'problem') {
194: $key ='resource.0.checkedin';
195: }
196: # backward compatability, used to be username@domain,
197: # now is username:domain
198: my $who = $Apache::lonhomework::history{$key};
199: if ($who !~ /:/) {
200: $who =~ tr/@/:/;
201: }
202: foreach my $possible (@possible_proctors) {
203: if ($who eq $possible
204: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
205: return 1;
206: }
207: }
208:
209: return 0;
210: }
211:
212: sub check_slot_access {
213: my ($id,$type)=@_;
214:
215: # does it pass normal muster
216: my ($status,$datemsg)=&check_access($id);
217:
218: my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
219: if ($useslots ne 'resource' && $useslots ne 'map'
220: && $useslots ne 'map_map') {
221: return ($status,$datemsg);
222: }
223:
224: if ($status eq 'SHOW_ANSWER' ||
225: $status eq 'CLOSED' ||
226: $status eq 'INVALID_ACCESS' ||
227: $status eq 'UNAVAILABLE') {
228: return ($status,$datemsg);
229: }
230: if ($env{'request.state'} eq "construct") {
231: return ($status,$datemsg);
232: }
233:
234: if ($type eq 'Task') {
235: my $version=$Apache::lonhomework::history{'resource.version'};
236: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
237: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
238: return ('SHOW_ANSWER');
239: }
240: }
241:
242: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
243: my $available = &Apache::lonnet::EXT("resource.0.available");
244: my @slots= (split(':',$availablestudent),split(':',$available));
245:
246: # if (!@slots) {
247: # return ($status,$datemsg);
248: # }
249: my $slotstatus='NOT_IN_A_SLOT';
250: my ($returned_slot,$slot_name);
251: foreach my $slot (@slots) {
252: $slot =~ s/(^\s*|\s*$)//g;
253: &Apache::lonxml::debug("getting $slot");
254: my %slot=&Apache::lonnet::get_slot($slot);
255: &Apache::lonhomework::showhash(%slot);
256: if ($slot{'starttime'} < time &&
257: $slot{'endtime'} > time &&
258: &Apache::loncommon::check_ip_acc($slot{'ip'})) {
259: &Apache::lonxml::debug("$slot is good");
260: $slotstatus='NEEDS_CHECKIN';
261: $returned_slot=\%slot;
262: $slot_name=$slot;
263: last;
264: }
265: }
266: if ($slotstatus eq 'NEEDS_CHECKIN' &&
267: &proctor_checked_in($slot_name,$returned_slot,$type)) {
268: &Apache::lonxml::debug("protoctor checked in");
269: $slotstatus='CAN_ANSWER';
270: }
271:
272: my ($is_correct,$got_grade,$checkedin);
273: if ($type eq 'Task') {
274: my $version=$Apache::lonhomework::history{'resource.0.version'};
275: $got_grade =
276: ($Apache::lonhomework::history{"resource.$version.0.status"}
277: =~ /^(?:pass|fail)$/);
278: $is_correct =
279: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
280: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
281: $checkedin =
282: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
283: } elsif ($type eq 'problem') {
284: $got_grade = 1;
285: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
286: $is_correct =
287: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
288: }
289:
290: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
291:
292: # no slot is currently open, and has been checked in for this version
293: # but hasn't got a grade, therefore must be awaiting a grade
294: if (!defined($slot_name)
295: && $checkedin
296: && !$got_grade) {
297: return ('WAITING_FOR_GRADE');
298: }
299:
300: # no slot is currently open, and has been checked in for this version
301: # previous slot is therefore CLOSED, so therefore the problem is
302: if (!defined($slot_name)
303: && $checkedin
304: && $type eq 'problem') {
305: return ('CLOSED',$datemsg);
306: }
307:
308: if ($slotstatus eq 'NOT_IN_A_SLOT'
309: && $checkedin ) {
310:
311: if ($got_grade) {
312: return ('SHOW_ANSWER');
313: } else {
314: return ('WAITING_FOR_GRADE');
315: }
316:
317: }
318:
319: if ( $is_correct) {
320: if ($type eq 'problem') {
321: return ($status);
322: }
323: return ('SHOW_ANSWER');
324: }
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 ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct'
349: && &hide_problem_status())) {
350: return ('CANNOT_ANSWER',
351: &mt('is in this state due to author settings.'));
352: }
353: } else {
354: return ($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 ($symb)=&Apache::lonnet::whichuser();
368: &Apache::lonxml::debug("symb:".$symb);
369: #if ($env{'request.state'} ne "construct" && $symb ne '') {
370: if ($env{'request.state'} ne "construct") {
371: my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
372: my $allowed=&Apache::loncommon::check_ip_acc($idacc);
373: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
374: $status='INVALID_ACCESS';
375: $date=&mt("can not be accessed from your location.");
376: return($status,$date);
377: }
378:
379: foreach my $temp ("opendate","duedate","answerdate") {
380: $lastdate = $date;
381: if ($temp eq 'duedate') {
382: $date = &due_date($id);
383: } else {
384: $date = &Apache::lonnet::EXT("resource.$id.$temp");
385: }
386:
387: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
388: if ($thistype =~ /^(con_lost|no_such_host)/ ||
389: $date =~ /^(con_lost|no_such_host)/) {
390: $status='UNAVAILABLE';
391: $date=&mt("may open later.");
392: return($status,$date);
393: }
394: if ($thistype eq 'date_interval') {
395: if ($temp eq 'opendate') {
396: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
397: }
398: if ($temp eq 'answerdate') {
399: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
400: }
401: }
402: &Apache::lonxml::debug("found :$date: for :$temp:");
403: if ($date eq '') {
404: $date = &mt("an unknown date"); $passed = 0;
405: } elsif ($date eq 'con_lost') {
406: $date = &mt("an indeterminate date"); $passed = 0;
407: } else {
408: if (time < $date) { $passed = 0; } else { $passed = 1; }
409: $date = &Apache::lonlocal::locallocaltime($date);
410: }
411: if (!$passed) { $type=$temp; last; }
412: }
413: &Apache::lonxml::debug("have :$type:$passed:");
414: if ($passed) {
415: $status='SHOW_ANSWER';
416: $datemsg=$date;
417: } elsif ($type eq 'opendate') {
418: $status='CLOSED';
419: $datemsg = &mt("will open on")." $date";
420: } elsif ($type eq 'duedate') {
421: $status='CAN_ANSWER';
422: $datemsg = &mt("is due at")." $date";
423: } elsif ($type eq 'answerdate') {
424: $status='CLOSED';
425: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
426: }
427: }
428: if ($status eq 'CAN_ANSWER' ||
429: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
430: #check #tries, and if correct.
431: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
432: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
433: if ( $tries eq '' ) { $tries = '0'; }
434: if ( $maxtries eq '' &&
435: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
436: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
437: # if (correct and show prob status) or excused then CANNOT_ANSWER
438: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
439: &&
440: &show_problem_status())
441: ||
442: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
443: $status = 'CANNOT_ANSWER';
444: }
445: if ($status eq 'CANNOT_ANSWER'
446: && &show_answer_problem_status()) {
447: $status = 'SHOW_ANSWER';
448: }
449: }
450: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
451: my @interval=&Apache::lonnet::EXT("resource.$id.interval");
452: &Apache::lonxml::debug("looking for interval @interval");
453: if ($interval[0]) {
454: my $first_access=&Apache::lonnet::get_first_access($interval[1]);
455: &Apache::lonxml::debug("looking for accesstime $first_access");
456: if (!$first_access) {
457: $status='NOT_YET_VIEWED';
458: my $due_date = &due_date($id);
459: my $seconds_left = $due_date - time;
460: if ($seconds_left > $interval[0] || $due_date eq '') {
461: $seconds_left = $interval[0];
462: }
463: $datemsg=&seconds_to_human_length($seconds_left);
464: }
465: }
466: }
467:
468: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
469: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
470: # return ('UNCHECKEDOUT','needs to be checked out');
471: #}
472:
473:
474: &Apache::lonxml::debug("sending back :$status:$datemsg:");
475: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
476: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
477: $status='CAN_ANSWER';
478: $datemsg=&mt('is closed but you are allowed to view it');
479: }
480:
481: return ($status,$datemsg);
482: }
483: # this should work exactly like the copy in lonnavmaps.pm
484: sub due_date {
485: my ($part_id,$symb,$udom,$uname)=@_;
486: my $date;
487: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
488: $udom,$uname);
489: &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
490: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
491: $udom,$uname);
492: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
493: if ($interval[0] =~ /\d+/) {
494: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
495: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
496: if (defined($first_access)) {
497: my $interval = $first_access+$interval[0];
498: $date = (!$due_date || $interval < $due_date) ? $interval
499: : $due_date;
500: } else {
501: $date = $due_date;
502: }
503: } else {
504: $date = $due_date;
505: }
506: return $date
507: }
508:
509: sub seconds_to_human_length {
510: my ($length)=@_;
511:
512: my $seconds=$length%60; $length=int($length/60);
513: my $minutes=$length%60; $length=int($length/60);
514: my $hours=$length%24; $length=int($length/24);
515: my $days=$length;
516:
517: my $timestr;
518: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
519: if ($hours > 0) { $timestr.=($timestr?", ":"").
520: &mt('[quant,_1,hour]',$hours); }
521: if ($minutes > 0) { $timestr.=($timestr?", ":"").
522: &mt('[quant,_1,minute]',$minutes); }
523: if ($seconds > 0) { $timestr.=($timestr?", ":"").
524: &mt('[quant,_1,second]',$seconds); }
525: return $timestr;
526: }
527:
528: sub showhash {
529: my (%hash) = @_;
530: &showhashsubset(\%hash,'.');
531: return '';
532: }
533:
534: sub showarray {
535: my ($array)=@_;
536: my $string="(";
537: foreach my $elm (@{ $array }) {
538: if (ref($elm) eq 'ARRAY') {
539: $string.=&showarray($elm);
540: } elsif (ref($elm) eq 'HASH') {
541: $string.= "HASH --- \n<br />";
542: $string.= &showhashsubset($elm,'.');
543: } else {
544: $string.="$elm,"
545: }
546: }
547: chop($string);
548: $string.=")";
549: return $string;
550: }
551:
552: sub showhashsubset {
553: my ($hash,$keyre) = @_;
554: my $resultkey;
555: foreach $resultkey (sort keys %$hash) {
556: if ($resultkey !~ /$keyre/) { next; }
557: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
558: &Apache::lonxml::debug("$resultkey ---- ".
559: &showarray($$hash{$resultkey}));
560: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
561: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
562: &showhashsubset($$hash{$resultkey},'.');
563: } else {
564: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
565: }
566: }
567: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
568: return '';
569: }
570:
571: sub setuppermissions {
572: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
573: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
574: if (! $viewgrades &&
575: exists($env{'request.course.sec'}) &&
576: $env{'request.course.sec'} !~ /^\s*$/) {
577: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
578: '/'.$env{'request.course.sec'});
579: }
580: $Apache::lonhomework::viewgrades = $viewgrades;
581:
582: if ($Apache::lonhomework::browse eq 'F' &&
583: $env{'form.devalidatecourseresdata'} eq 'on') {
584: my (undef,$courseid) = &Apache::lonnet::whichuser();
585: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
586: $env{"course.$courseid.domain"});
587: }
588:
589: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
590: if (! $modifygrades &&
591: exists($env{'request.course.sec'}) &&
592: $env{'request.course.sec'} !~ /^\s*$/) {
593: $modifygrades =
594: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
595: '/'.$env{'request.course.sec'});
596: }
597: $Apache::lonhomework::modifygrades = $modifygrades;
598:
599: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
600: if (! $queuegrade &&
601: exists($env{'request.course.sec'}) &&
602: $env{'request.course.sec'} !~ /^\s*$/) {
603: $queuegrade =
604: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
605: '/'.$env{'request.course.sec'});
606: }
607: $Apache::lonhomework::queuegrade = $queuegrade;
608: return '';
609: }
610:
611: sub unset_permissions {
612: undef($Apache::lonhomework::queuegrade);
613: undef($Apache::lonhomework::modifygrades);
614: undef($Apache::lonhomework::viewgrades);
615: undef($Apache::lonhomework::browse);
616: }
617:
618: sub setupheader {
619: my $request=$_[0];
620: &Apache::loncommon::content_type($request,'text/html');
621: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
622: &Apache::loncommon::no_cache($request);
623: }
624: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
625: # 'lastrevisiondate'));
626: $request->send_http_header;
627: return OK if $request->header_only;
628: return ''
629: }
630:
631: sub handle_save_or_undo {
632: my ($request,$problem,$result) = @_;
633: my $file = &Apache::lonnet::filelocation("",$request->uri);
634: my $filebak =$file.".bak";
635: my $filetmp =$file.".tmp";
636: my $error=0;
637: if ($env{'form.Undo'} eq &mt('undo')) {
638: my $error=0;
639: if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
640: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
641: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
642: if (!$error) {
643: &Apache::lonxml::info("<p><b>".
644: &mt("Undid changes, Switched [_1] and [_2]",
645: '<span class="LC_filename">'.$filebak.
646: '</span>',
647: '<span class="LC_filename">'.$file.
648: '</span>')."</b></p>");
649: } else {
650: &Apache::lonxml::info("<p><span class=\"LC_error\">".
651: &mt("Unable to undo, unable to switch [_1] and [_2]",
652: '<span class="LC_filename">'.
653: $filebak.'</span>',
654: '<span class="LC_filename">'.
655: $file.'</span>')."</span></p>");
656: $error=1;
657: }
658: } else {
659: &Apache::lonnet::correct_line_ends($result);
660: my $fs=Apache::File->new(">$filebak");
661: if (defined($fs)) {
662: print $fs $$problem;
663: } else {
664: &Apache::lonxml::info("<span class=\"LC_error\">".
665: &mt("Unable to make backup [_1]",
666: '<span class="LC_filename">'.
667: $filebak.'</span>')."</span>");
668: $error=2;
669: }
670: my $fh=Apache::File->new(">$file");
671: if (defined($fh)) {
672: print $fh $$result;
673: } else {
674: &Apache::lonxml::info('<span class="LC_error">'.
675: &mt("Unable to write to [_1]",
676: '<span class="LC_filename">'.
677: $file.'</span>').
678: '</span>');
679: $error|=4;
680: }
681: }
682: return $error;
683: }
684:
685: sub analyze_header {
686: my ($request) = @_;
687: my $js = &Apache::structuretags::setmode_javascript();
688: my $result =
689: &Apache::loncommon::start_page('Analyzing a problem',$js);
690:
691: $result .=
692: &Apache::lonxml::message_location().'
693: <form name="lonhomework" method="POST" action="'.
694: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
695: '<input type="hidden" name="problemmode" value="'.
696: $env{'form.problemmode'}.'" />'.
697: &Apache::structuretags::remember_problem_state().'
698: <div class="LC_edit_problem_analyze_header">
699: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
700: 'onclick="javascript:setmode(this.form,'."'editxml'".')" />
701: <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
702: 'onclick="javascript:setmode(this.form,'."'edit'".')" />
703: <hr class="LC_edit_problem_divide" />
704: <input type="button" name="submitmode" value="'.&mt("View").'" '.
705: 'onclick="javascript:setmode(this.form,'."'view'".')" />
706: <hr class="LC_edit_problem_divide" />
707: </div>
708: </form>';
709: &Apache::lonxml::add_messages(\$result);
710: $request->print($result);
711: $request->rflush();
712: }
713:
714: sub analyze_footer {
715: my ($request) = @_;
716: $request->print(&Apache::loncommon::end_page());
717: $request->rflush();
718: }
719:
720: sub analyze {
721: my ($request,$file) = @_;
722: &Apache::lonxml::debug("Analyze");
723: my $result;
724: my %overall;
725: my %seedexample;
726: my %allparts;
727: my $rndseed=$env{'form.rndseed'};
728: &analyze_header($request);
729: my %prog_state=
730: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
731: &mt('Getting Problem Variants'),
732: $env{'form.numtoanalyze'},
733: 'inline',undef);
734: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
735: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
736: &mt('last problem'));
737: if (&Apache::loncommon::connection_aborted($request)) { return; }
738: my $thisseed=$i+$rndseed;
739: my $subresult=&Apache::lonnet::ssi($request->uri,
740: ('grade_target' => 'analyze'),
741: ('rndseed' => $thisseed));
742: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
743: my %analyze=&Apache::lonnet::str2hash($subresult);
744: my @parts;
745: if (defined(@{ $analyze{'parts'} })) {
746: @parts=@{ $analyze{'parts'} };
747: }
748: foreach my $part (@parts) {
749: if (!exists($allparts{$part})) {$allparts{$part}=1;};
750: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
751: $analyze{$part.'.type'} eq 'stringresponse' ||
752: $analyze{$part.'.type'} eq 'formularesponse' ) {
753: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
754: my $i=0;
755: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
756: push( @{ $overall{$part.'.answer'}[$i] },
757: $answer_part);
758: my $concatanswer= join("\0",@{ $answer_part });
759: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
760: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
761: }
762: $seedexample{join("\0",$part,$i,@{$answer_part})}=
763: $thisseed;
764: $i++;
765: }
766: }
767: if (!keys(%{ $analyze{$part.'.answer'} })) {
768: my $answer_part =
769: ['<span class="LC_error">'.&mt('Error').'</span>'];
770: $seedexample{join("\0",$part,0,@{$answer_part})}=
771: $thisseed;
772: push( @{ $overall{$part.'.answer'}[0] },
773: $answer_part);
774: }
775: }
776: }
777: }
778: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
779: &mt('Analyzing Results'));
780: $request->print('<hr class="LC_edit_problem_divide" />'.&mt('List of possible answers').': ');
781: foreach my $part (sort(keys(%allparts))) {
782: if (defined(@{ $overall{$part.'.answer'} })) {
783: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
784: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
785: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part);
786: if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
787: $request->print(&mt(' Answer [_1]',$i+1));
788: }
789: $request->print('</th></tr>');
790: my %frequency;
791: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
792: $frequency{join("\0",@{ $answer })}++;
793: }
794: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
795: .&mt('click for example').')</th></tr>');
796: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
797: $request->print('<tr><td class="center">'.
798: join('</td><td class="center">',split("\0",$answer)).
799: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.
800: '</a></td></tr>');
801: }
802: $request->print('</table>');
803: }
804: } else {
805: $request->print('<p>'.&mt('Response').' '.$part.' '.
806: &mt('is not analyzable at this time').'</p>');
807: }
808: }
809: if (scalar(keys(%allparts)) == 0 ) {
810: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
811: }
812: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
813: &analyze_footer($request);
814: &Apache::lonhomework::showhash(%overall);
815: return $result;
816: }
817:
818: {
819: my $show_problem_status;
820: sub reset_show_problem_status {
821: undef($show_problem_status);
822: }
823:
824: sub set_show_problem_status {
825: my ($new_status) = @_;
826: $show_problem_status = lc($new_status);
827: }
828:
829: sub hide_problem_status {
830: return ($show_problem_status eq 'no'
831: || $show_problem_status eq 'no_feedback_ever');
832: }
833:
834: sub show_problem_status {
835: return ($show_problem_status eq 'yes'
836: || $show_problem_status eq 'answer'
837: || $show_problem_status eq '');
838: }
839:
840: sub show_some_problem_status {
841: return ($show_problem_status eq 'no');
842: }
843:
844: sub show_no_problem_status {
845: return ($show_problem_status eq 'no_feedback_ever');
846: }
847:
848: sub show_answer_problem_status {
849: return ($show_problem_status eq 'answer');
850: }
851: }
852:
853: sub editxmlmode {
854: my ($request,$file) = @_;
855: my $result;
856: my $problem=&Apache::lonnet::getfile($file);
857: if ($problem eq -1) {
858: &Apache::lonxml::error("<b> ".&mt('Unable to find').
859: " <i>$file</i></b>");
860: $problem='';
861: }
862: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
863: my $error=&handle_save_or_undo($request,\$problem,
864: \$env{'form.editxmltext'});
865: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
866: }
867: &Apache::lonhomework::showhashsubset(\%env,'^form');
868: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
869: &Apache::lonhomework::showhashsubset(\%env,'^form');
870: $env{'form.problemmode'}='view';
871: &renderpage($request,$file);
872: } else {
873: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
874: my $xml_help = '<table><tr><td>'.
875: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
876: "Problem Editing Help").
877: '</td><td>'.
878: &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
879: '</td></tr></table>';
880: if ($cols > 80) { $cols = 80; }
881: if ($cols < 70) { $cols = 70; }
882: if ($rows < 20) { $rows = 20; }
883: my $js =
884: &Apache::edit::js_change_detection().
885: &Apache::loncommon::resize_textarea_js().
886: &Apache::structuretags::setmode_javascript().
887: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
888: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1;
889: my $dragmath_button =
890: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
891: my $start_page =
892: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
893: {'no_auto_mt_title' => 1,
894: 'only_body' => $only_body,
895: 'add_entries' => {
896: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
897: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
898: }});
899: $result.=$start_page.
900: &renderpage($request,$file,['no_output_web'],1).
901: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
902: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
903: &Apache::structuretags::remember_problem_state().'
904: <div class="LC_edit_problem_editxml_header">
905: <table class="LC_edit_problem_header_title"><tr><td>
906: '.&mt('Problem Editing').&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'
907: </td><td align="right">
908: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
909: </td></tr>
910: </table>
911: <div class="LC_edit_problem_discards">
912: <input type="hidden" name="problemmode" value="editxml" />
913:
914: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
915: 'onclick="javascript:setmode(this.form,'."'discard'".')" />
916: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
917: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
918: '.$dragmath_button.'
919: </div>
920: <div class="LC_edit_problem_saves">
921: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" />
922: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
923: </div>
924: <hr class="LC_edit_problem_divide" />
925: '.&Apache::lonxml::message_location().'
926: </div>
927: ' . '
928: <textarea '.&Apache::edit::element_change_detection().
929: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
930: ' name="editxmltext" id="LC_editxmltext">'.
931: &HTML::Entities::encode($problem,'<>&"').'</textarea>
932: <div id="LC_aftertextarea">
933: </div>
934: </form>'.&Apache::loncommon::end_page();
935: &Apache::lonxml::add_messages(\$result);
936: $request->print($result);
937: }
938: return '';
939: }
940:
941: #
942: # Render the page in whatever target desired.
943: #
944: sub renderpage {
945: my ($request,$file,$targets,$return_string) = @_;
946:
947: my @targets = @{$targets || [&get_target()]};
948: &Apache::lonhomework::showhashsubset(\%env,'form.');
949: &Apache::lonxml::debug("Running targets ".join(':',@targets));
950:
951: my $overall_result;
952: foreach my $target (@targets) {
953: # FIXME need to do something intelligent when a problem goes
954: # from viewable to not viewable due to map conditions
955: #&setuppermissions();
956: #if ( $Apache::lonhomework::browse ne '2'
957: # && $Apache::lonhomework::browse ne 'F' ) {
958: # $request->print(" You most likely shouldn't see me.");
959: #}
960: #my $t0 = [&gettimeofday()];
961: my $output=1;
962: if ($target eq 'no_output_web') {
963: $target = 'web'; $output=0;
964: }
965: my $problem=&Apache::lonnet::getfile($file);
966: my $result;
967: if ($problem eq -1) {
968: $problem='';
969: my $filename=(split('/',$file))[-1];
970: my $error =
971: "<b> ".&mt('Unable to find [_1]',
972: ' <span class="LC_filename">'.$filename.'</span>')
973: ."</b>";
974: $result.=
975: &Apache::loncommon::simple_error_page($request,'Not available',
976: $error);
977: return;
978: }
979:
980: my %mystyle;
981: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
982: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
983: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
984:
985: &Apache::lonxml::debug("Should be parsing now");
986: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
987: &setup_vars($target),%mystyle);
988: &finished_parsing();
989: if (!$output) { $result = ''; }
990: #$request->print("Result follows:");
991: if ($target eq 'modified') {
992: &handle_save_or_undo($request,\$problem,\$result);
993: } else {
994: if ($target eq 'analyze') {
995: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
996: undef(%Apache::lonhomework::analyze);
997: }
998: #my $td=&tv_interval($t0);
999: #if ( $Apache::lonxml::debug) {
1000: #$result =~ s:</body>::;
1001: #$result.="<br />Spent $td seconds processing target $target\n</body>";
1002: #}
1003: # $request->print($result);
1004: $overall_result.=$result;
1005: # $request->rflush();
1006: }
1007: #$request->print(":Result ends");
1008: #my $td=&tv_interval($t0);
1009: }
1010: if (!$return_string) {
1011: &Apache::lonxml::add_messages(\$overall_result);
1012: $request->print($overall_result);
1013: $request->rflush();
1014: } else {
1015: return $overall_result;
1016: }
1017: }
1018:
1019: sub finished_parsing {
1020: undef($Apache::lonhomework::parsing_a_problem);
1021: undef($Apache::lonhomework::parsing_a_task);
1022: }
1023:
1024: sub get_template_list {
1025: my ($extension) = @_;
1026: my $result;
1027: my @allnames;
1028: &Apache::lonxml::debug("Looking for :$extension:");
1029: my $glob_extension = $extension;
1030: if ($extension eq 'survey' || $extension eq 'exam') {
1031: $glob_extension = 'problem';
1032: }
1033: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
1034: '/templates/*.'.$glob_extension);
1035: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
1036: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
1037: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
1038: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1039: my ($midpoint,$seconddiv,$numfiles);
1040: $numfiles = 0;
1041: foreach my $file (@files) {
1042: next if ($file->[1] !~ /\S/);
1043: $numfiles ++;
1044: }
1045: if ($numfiles > 0) {
1046: $result = '<div class="LC_left_float">';
1047: $midpoint = int($numfiles/2);
1048: if ($numfiles%2) {
1049: $midpoint ++;
1050: }
1051: }
1052: my $count = 0;
1053: my $currentcategory='';
1054: foreach my $file (@files) {
1055: next if ($file->[1] !~ /\S/);
1056: if ($file->[2] ne $currentcategory) {
1057: $currentcategory=$file->[2];
1058: if ((!$seconddiv) && ($count >= $midpoint)) {
1059: $result .= '</div>'."\n".'<div class="LC_left_float">'."\n";
1060: $seconddiv = 1;
1061: }
1062: $result.='<h3>'.$currentcategory.'</h3>';
1063: $count++;
1064: }
1065: $result .=
1066: '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1067: $file->[1].'</label>';
1068: if ($file->[3]) {
1069: $result.=&Apache::loncommon::help_open_topic($file->[3]);
1070: }
1071: my $filename=$file->[0];
1072: $filename=~s/^\/home\/httpd\/html//;
1073: $result.=' <font size="-2"><a href="'.$filename.'" target="sample">'.&mt('Example').'</font></a><br />'."\n";
1074: $count ++;
1075: }
1076: if ($numfiles > 0) {
1077: $result .= '</div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1078: }
1079: return $result;
1080: }
1081:
1082: sub newproblem {
1083: my ($request) = @_;
1084:
1085: if ($env{'form.template'}) {
1086: my $file = $env{'form.template'};
1087: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1088: &File::Copy::copy($file,$dest);
1089: &renderpage($request,$dest);
1090: return;
1091: }
1092:
1093: my ($extension) = ($request->uri =~ m/\.(\w+)$/);
1094: &Apache::lonxml::debug("Looking for :$extension:");
1095: my $templatelist=&get_template_list($extension);
1096: if ($env{'form.newfile'} && !$templatelist) {
1097: # no templates found
1098: my $templatefilename =
1099: $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1100: &Apache::lonxml::debug("$templatefilename");
1101: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1102: &File::Copy::copy($templatefilename,$dest);
1103: &renderpage($request,$dest);
1104: } else {
1105: my $url=&HTML::Entities::encode($request->uri,'<>&"');
1106: my $shownurl=$url;
1107: $shownurl=~s-^/~-/priv/-;
1108: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1109: my $errormsg;
1110: my $instructions;
1111: my $start_page =
1112: &Apache::loncommon::start_page("Create New $extension");
1113: $request->print("
1114: $start_page
1115: <h1>".&mt("Creating a new $extension resource.")."</h1>
1116: $errormsg
1117: ".&mt("The requested file [_1] currently does not exist.",
1118: "<tt>$shownurl</tt>")."
1119: <p>
1120: <b>
1121: ".&mt("To create a new $extension, select a template from the".
1122: " list below. Then click on the \"Create $extension\" button.")."</b>
1123: </p><form action=\"$url\" method=\"POST\">");
1124:
1125: if (defined($templatelist)) {
1126: $request->print($templatelist);
1127: }
1128: $request->print('<br /><input type="submit" name="newfile" value="'.
1129: &mt("Create $extension").'" />');
1130: $request->print("</form></p>".&Apache::loncommon::end_page());
1131: }
1132: return;
1133: }
1134:
1135: sub update_construct_style {
1136: if ($env{'request.state'} eq "construct"
1137: && $env{'form.problemmode'} eq 'view'
1138: && defined($env{'form.submitted'})
1139: && !defined($env{'form.resetdata'})
1140: && !defined($env{'form.newrandomization'})) {
1141: if ((!$env{'form.style_file'} && $env{'construct.style'})
1142: ||$env{'form.clear_style_file'}) {
1143: &Apache::lonnet::delenv('construct\\.style');
1144: } elsif ($env{'form.style_file'}
1145: && $env{'construct.style'} ne $env{'form.style_file'}) {
1146: &Apache::lonnet::appenv({'construct.style' =>
1147: $env{'form.style_file'}});
1148: }
1149: }
1150: }
1151:
1152:
1153: sub handler {
1154: #my $t0 = [&gettimeofday()];
1155: my $request=$_[0];
1156: $Apache::lonxml::request=$request;
1157: $Apache::lonxml::debug=$env{'user.debug'};
1158: $env{'request.uri'}=$request->uri;
1159: &setuppermissions();
1160:
1161: my $file=&Apache::lonnet::filelocation("",$request->uri);
1162:
1163: #check if we know where we are
1164: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1165: # if we are browsing we might not be able to know where we are
1166: if ($Apache::lonhomework::browse ne 'F' &&
1167: $env{'request.state'} ne "construct") {
1168: #should know where we are, so ask
1169: &unset_permissions();
1170: $request->internal_redirect('/adm/ambiguous');
1171: return OK;
1172: }
1173: }
1174: if (&setupheader($request)) {
1175: &unset_permissions();
1176: return OK;
1177: }
1178: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1179: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1180: my ($symb) = &Apache::lonnet::whichuser();
1181: &Apache::lonxml::debug('symb is '.$symb);
1182: if ($env{'request.state'} eq "construct") {
1183: if ( -e $file ) {
1184: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1185: ['problemmode']);
1186: if (!(defined $env{'form.problemmode'})) {
1187: #first visit to problem in construction space
1188: $env{'form.problemmode'}= 'view';
1189: &renderpage($request,$file);
1190: } elsif ($env{'form.problemmode'} eq 'editxml') {
1191: &editxmlmode($request,$file);
1192: } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1193: &analyze($request,$file);
1194: } else {
1195: &update_construct_style();
1196: &renderpage($request,$file);
1197: }
1198: } else {
1199: # requested file doesn't exist in contruction space
1200: &newproblem($request);
1201: }
1202: } else {
1203: # just render the page normally outside of construction space
1204: &Apache::lonxml::debug("not construct");
1205: &renderpage($request,$file);
1206: }
1207: #my $td=&tv_interval($t0);
1208: #&Apache::lonxml::debug("Spent $td seconds processing");
1209: # always turn off debug messages
1210: $Apache::lonxml::debug=0;
1211: &unset_permissions();
1212: return OK;
1213:
1214: }
1215:
1216: 1;
1217: __END__
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