1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.241 2006/04/21 15:26:25 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: $slot =~ s/(^\s*|\s*$)//g;
270: &Apache::lonxml::debug("getting $slot");
271: my %slot=&Apache::lonnet::get_slot($slot);
272: &Apache::lonhomework::showhash(%slot);
273: if ($slot{'starttime'} < time &&
274: $slot{'endtime'} > time &&
275: &check_ip_acc($slot{'ip'})) {
276: &Apache::lonxml::debug("$slot is good");
277: $slotstatus='NEEDS_CHECKIN';
278: $returned_slot=\%slot;
279: $slot_name=$slot;
280: last;
281: }
282: }
283: if ($slotstatus eq 'NEEDS_CHECKIN' &&
284: &proctor_checked_in($slot_name,$returned_slot,$type)) {
285: &Apache::lonxml::debug("protoctor checked in");
286: $slotstatus='CAN_ANSWER';
287: }
288:
289: my ($is_correct,$got_grade,$checkedin);
290: if ($type eq 'Task') {
291: my $version=$Apache::lonhomework::history{'resource.0.version'};
292: $got_grade =
293: ($Apache::lonhomework::history{"resource.$version.0.status"}
294: =~ /^(?:pass|fail)$/);
295: $is_correct =
296: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
297: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
298: $checkedin =
299: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
300: } elsif ($type eq 'problem') {
301: $got_grade = 1;
302: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
303: }
304:
305: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
306:
307: # has a current checked in recrd, but hasn't got a grade, must be awaiting
308: # a grade
309: if ($checkedin
310: && !$got_grade) {
311: return ('WAITING_FOR_GRADE');
312: }
313:
314: if ($slotstatus eq 'NOT_IN_A_SLOT'
315: && $checkedin ) {
316:
317: if ($got_grade) {
318: return ('SHOW_ANSWER');
319: } else {
320: return ('WAITING_FOR_GRADE');
321: }
322:
323: }
324: if ( $is_correct) {
325: return ('SHOW_ANSWER');
326: }
327: if ( $status eq 'CANNOT_ANSWER' &&
328: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
329: return ($status,$datemsg);
330: }
331:
332: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
333: }
334:
335: # JB, 9/24/2002: Any changes in this function may require a change
336: # in lonnavmaps::resource::getDateStatus.
337: sub check_access {
338: my ($id) = @_;
339: my $date ='';
340: my $status;
341: my $datemsg = '';
342: my $lastdate = '';
343: my $type;
344: my $passed;
345:
346: if ($env{'request.state'} eq "construct") {
347: if ($env{'form.problemstate'}) {
348: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
349: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
350: lc($Apache::lonhomework::problemstatus) eq 'no')) {
351: return ('CANNOT_ANSWER',
352: &mt('is in this state due to author settings.'));
353: }
354: } else {
355: return ($env{'form.problemstate'},
356: &mt('is in this state due to author settings.'));
357: }
358: }
359: &Apache::lonxml::debug("in construction ignoring dates");
360: $status='CAN_ANSWER';
361: $datemsg=&mt('is in under construction');
362: # return ($status,$datemsg);
363: }
364:
365: &Apache::lonxml::debug("checking for part :$id:");
366: &Apache::lonxml::debug("time:".time);
367:
368: my ($symb)=&Apache::lonxml::whichuser();
369: &Apache::lonxml::debug("symb:".$symb);
370: #if ($env{'request.state'} ne "construct" && $symb ne '') {
371: if ($env{'request.state'} ne "construct") {
372: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
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: $date = &Apache::lonnet::EXT("resource.$id.$temp");
382: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
383: if ($thistype =~ /^(con_lost|no_such_host)/ ||
384: $date =~ /^(con_lost|no_such_host)/) {
385: $status='UNAVAILABLE';
386: $date=&mt("may open later.");
387: return($status,$date);
388: }
389: if ($thistype eq 'date_interval') {
390: if ($temp eq 'opendate') {
391: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
392: }
393: if ($temp eq 'answerdate') {
394: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
395: }
396: }
397: &Apache::lonxml::debug("found :$date: for :$temp:");
398: if ($date eq '') {
399: $date = &mt("an unknown date"); $passed = 0;
400: } elsif ($date eq 'con_lost') {
401: $date = &mt("an indeterminate date"); $passed = 0;
402: } else {
403: if (time < $date) { $passed = 0; } else { $passed = 1; }
404: $date = localtime $date;
405: }
406: if (!$passed) { $type=$temp; last; }
407: }
408: &Apache::lonxml::debug("have :$type:$passed:");
409: if ($passed) {
410: $status='SHOW_ANSWER';
411: $datemsg=$date;
412: } elsif ($type eq 'opendate') {
413: $status='CLOSED';
414: $datemsg = &mt("will open on")." $date";
415: } elsif ($type eq 'duedate') {
416: $status='CAN_ANSWER';
417: $datemsg = &mt("is due at")." $date";
418: } elsif ($type eq 'answerdate') {
419: $status='CLOSED';
420: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
421: }
422: }
423: if ($status eq 'CAN_ANSWER' ||
424: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
425: #check #tries, and if correct.
426: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
427: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
428: if ( $tries eq '' ) { $tries = '0'; }
429: if ( $maxtries eq '' &&
430: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
431: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
432: # if (correct and show prob status) or excused then CANNOT_ANSWER
433: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
434: &&
435: lc($Apache::lonhomework::problemstatus) ne 'no')
436: ||
437: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
438: $status = 'CANNOT_ANSWER';
439: }
440: }
441: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
442: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
443: &Apache::lonxml::debug("looking for interval $interval");
444: if ($interval) {
445: my $first_access=&Apache::lonnet::get_first_access('map');
446: &Apache::lonxml::debug("looking for accesstime $first_access");
447: if (!$first_access) {
448: $status='NOT_YET_VIEWED';
449: $datemsg=&seconds_to_human_length($interval);
450: } else {
451: my $newdate=localtime($first_access+$interval);
452: if (time > ($first_access+$interval)) {
453: $status='CLOSED';
454: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
455: } else {
456: $datemsg = &mt("is due at")." $newdate";
457: }
458: }
459: }
460: }
461: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
462: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
463: # return ('UNCHECKEDOUT','needs to be checked out');
464: #}
465:
466:
467: &Apache::lonxml::debug("sending back :$status:$datemsg:");
468: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
469: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
470: $status='CAN_ANSWER';
471: $datemsg=&mt('is closed but you are allowed to view it');
472: }
473:
474: return ($status,$datemsg);
475: }
476:
477: sub seconds_to_human_length {
478: my ($length)=@_;
479:
480: my $seconds=$length%60; $length=int($length/60);
481: my $minutes=$length%60; $length=int($length/60);
482: my $hours=$length%24; $length=int($length/24);
483: my $days=$length;
484:
485: my $timestr;
486: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
487: if ($hours > 0) { $timestr.=($timestr?", ":"").
488: &mt('[quant,_1,hour]',$hours); }
489: if ($minutes > 0) { $timestr.=($timestr?", ":"").
490: &mt('[quant,_1,minute]',$minutes); }
491: if ($seconds > 0) { $timestr.=($timestr?", ":"").
492: &mt('[quant,_1,second]',$seconds); }
493: return $timestr;
494: }
495:
496: sub showhash {
497: my (%hash) = @_;
498: &showhashsubset(\%hash,'.');
499: return '';
500: }
501:
502: sub showarray {
503: my ($array)=@_;
504: my $string="(";
505: foreach my $elm (@{ $array }) {
506: if (ref($elm) eq 'ARRAY') {
507: $string.=&showarray($elm);
508: } elsif (ref($elm) eq 'HASH') {
509: $string.= "HASH --- \n<br />";
510: $string.= &showhashsubset($elm,'.');
511: } else {
512: $string.="$elm,"
513: }
514: }
515: chop($string);
516: $string.=")";
517: return $string;
518: }
519:
520: sub showhashsubset {
521: my ($hash,$keyre) = @_;
522: my $resultkey;
523: foreach $resultkey (sort keys %$hash) {
524: if ($resultkey !~ /$keyre/) { next; }
525: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
526: &Apache::lonxml::debug("$resultkey ---- ".
527: &showarray($$hash{$resultkey}));
528: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
529: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
530: &showhashsubset($$hash{$resultkey},'.');
531: } else {
532: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
533: }
534: }
535: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
536: return '';
537: }
538:
539: sub setuppermissions {
540: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
541: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
542: if (! $viewgrades &&
543: exists($env{'request.course.sec'}) &&
544: $env{'request.course.sec'} !~ /^\s*$/) {
545: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
546: '/'.$env{'request.course.sec'});
547: }
548: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
549: if ($Apache::lonhomework::browse eq 'F' &&
550: $env{'form.devalidatecourseresdata'} eq 'on') {
551: my (undef,$courseid) = &Apache::lonxml::whichuser();
552: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
553: $env{"course.$courseid.domain"});
554: }
555: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
556: if (! $modifygrades &&
557: exists($env{'request.course.sec'}) &&
558: $env{'request.course.sec'} !~ /^\s*$/) {
559: $modifygrades =
560: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
561: '/'.$env{'request.course.sec'});
562: }
563: $Apache::lonhomework::modifygrades = $modifygrades;
564: return '';
565: }
566:
567: sub setupheader {
568: my $request=$_[0];
569: &Apache::loncommon::content_type($request,'text/html');
570: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
571: &Apache::loncommon::no_cache($request);
572: }
573: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
574: # 'lastrevisiondate'));
575: $request->send_http_header;
576: return OK if $request->header_only;
577: return ''
578: }
579:
580: sub handle_save_or_undo {
581: my ($request,$problem,$result) = @_;
582: my $file = &Apache::lonnet::filelocation("",$request->uri);
583: my $filebak =$file.".bak";
584: my $filetmp =$file.".tmp";
585: my $error=0;
586:
587: &Apache::lonnet::correct_line_ends($result);
588:
589: if ($env{'form.Undo'} eq &mt('undo')) {
590: my $error=0;
591: if (!copy($file,$filetmp)) { $error=1; }
592: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
593: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
594: if (!$error) {
595: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
596: } else {
597: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
598: $error=1;
599: }
600: } else {
601: my $fs=Apache::File->new(">$filebak");
602: if (defined($fs)) {
603: print $fs $$problem;
604: &Apache::lonxml::info("<b>".&mt("Making Backup to").
605: " $filebak</b>");
606: } else {
607: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
608: $error=2;
609: }
610: my $fh=Apache::File->new(">$file");
611: if (defined($fh)) {
612: print $fh $$result;
613: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
614: " $file</b>");
615: } else {
616: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
617: &mt("Unable to write to")." $file</b></font>");
618: $error|=4;
619: }
620: }
621: return $error;
622: }
623:
624: sub analyze_header {
625: my ($request) = @_;
626: my $result =
627: &Apache::loncommon::start_page('Analyzing a problem',undef);
628:
629: $result .=
630: &Apache::lonxml::message_location().'
631: <form name="lonhomework" method="POST" action="'.
632: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
633: &Apache::structuretags::remember_problem_state().'
634: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
635: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
636: <hr />
637: <input type="submit" name="submit" value="'.&mt("View").'" />
638: <hr />
639: </form>';
640: &Apache::lonxml::add_messages(\$result);
641: $request->print($result);
642: $request->rflush();
643: }
644:
645: sub analyze_footer {
646: my ($request) = @_;
647: $request->print(&Apache::loncommon::end_page());
648: $request->rflush();
649: }
650:
651: sub analyze {
652: my ($request,$file) = @_;
653: &Apache::lonxml::debug("Analyze");
654: my $result;
655: my %overall;
656: my %seedexample;
657: my %allparts;
658: my $rndseed=$env{'form.rndseed'};
659: &analyze_header($request);
660: my %prog_state=
661: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
662: &mt('Getting Problem Variants'),
663: $env{'form.numtoanalyze'},
664: 'inline',undef);
665: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
666: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
667: &mt('last problem'));
668: if (&Apache::loncommon::connection_aborted($request)) { return; }
669: my $thisseed=$i+$rndseed;
670: my $subresult=&Apache::lonnet::ssi($request->uri,
671: ('grade_target' => 'analyze'),
672: ('rndseed' => $thisseed));
673: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
674: my %analyze=&Apache::lonnet::str2hash($subresult);
675: my @parts;
676: if (defined(@{ $analyze{'parts'} })) {
677: @parts=@{ $analyze{'parts'} };
678: }
679: foreach my $part (@parts) {
680: if (!exists($allparts{$part})) {$allparts{$part}=1;};
681: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
682: $analyze{$part.'.type'} eq 'stringresponse' ||
683: $analyze{$part.'.type'} eq 'formularesponse' ) {
684: my $concatanswer=join("\0",@{ $analyze{$part.'.answer'} });
685: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
686: @{$analyze{$part.'.answer'}}=('<font color="red">'.&mt('Error').'</font>');
687: }
688: push( @{ $overall{$part.'.answer'} },
689: [@{ $analyze{$part.'.answer'} }]);
690: $seedexample{join("\0",@{ $analyze{$part.'.answer'}})}=$thisseed;
691: }
692: }
693: }
694: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
695: &mt('Analyzing Results'));
696: $request->print('<hr />'.&mt('List of possible answers').': ');
697: foreach my $part (sort(keys(%allparts))) {
698: if (defined(@{ $overall{$part.'.answer'} })) {
699: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
700: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
701: my %frequency;
702: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
703: $frequency{join("\0",@{ $answer })}++;
704: }
705: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
706: .&mt('click for example').')</th></tr>');
707: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
708: $request->print('<tr><td class="center">'.
709: join('</td><td class="center">',split("\0",$answer)).
710: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{$answer}.'">'.$frequency{$answer}.
711: '</a></td></tr>');
712: }
713: $request->print('</table>');
714: } else {
715: $request->print('<p>'.&mt('Response').' '.$part.' '.
716: &mt('is not analyzable at this time').'</p>');
717: }
718: }
719: if (scalar(keys(%allparts)) == 0 ) {
720: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
721: }
722: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
723: &analyze_footer($request);
724: &Apache::lonhomework::showhash(%overall);
725: return $result;
726: }
727:
728: sub editxmlmode {
729: my ($request,$file) = @_;
730: my $result;
731: my $problem=&Apache::lonnet::getfile($file);
732: if ($problem eq -1) {
733: &Apache::lonxml::error("<b> ".&mt('Unable to find').
734: " <i>$file</i></b>");
735: $problem='';
736: }
737: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
738: my $error=&handle_save_or_undo($request,\$problem,
739: \$env{'form.editxmltext'});
740: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
741: }
742: &Apache::lonhomework::showhashsubset(\%env,'^form');
743: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
744: &Apache::lonhomework::showhashsubset(\%env,'^form');
745: $env{'form.problemmode'}='View';
746: &renderpage($request,$file);
747: } else {
748: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
749: my $xml_help = '<table><tr><td>'.
750: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
751: "Problem Editing Help").
752: '</td><td>'.
753: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
754: '</td></tr></table>';
755: if ($cols > 80) { $cols = 80; }
756: if ($cols < 70) { $cols = 70; }
757: if ($rows < 20) { $rows = 20; }
758: my $start_page =
759: &Apache::loncommon::start_page("EditXML $file",
760: &Apache::edit::js_change_detection());
761:
762: $result.=$start_page.
763: &renderpage($request,$file,['no_output_web'],1).
764: &Apache::lonxml::message_location().'
765: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
766: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
767: &Apache::structuretags::remember_problem_state().'
768: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
769: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
770: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
771: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
772: <hr />
773: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
774: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
775: <hr />
776: ' . $xml_help . '
777: <textarea '.&Apache::edit::element_change_detection().' style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
778: &HTML::Entities::encode($problem,'<>&"').'</textarea><br />
779: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
780: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
781: </form>'.&Apache::loncommon::end_page();
782: &Apache::lonxml::add_messages(\$result);
783: $request->print($result);
784: }
785: return '';
786: }
787:
788: #
789: # Render the page in whatever target desired.
790: #
791: sub renderpage {
792: my ($request,$file,$targets,$return_string) = @_;
793:
794: my @targets = @{$targets || [&get_target()]};
795: &Apache::lonhomework::showhashsubset(\%env,'form.');
796: &Apache::lonxml::debug("Running targets ".join(':',@targets));
797: my $overall_result;
798: foreach my $target (@targets) {
799: # FIXME need to do something intelligent when a problem goes
800: # from viewable to not viewable due to map conditions
801: #&setuppermissions();
802: #if ( $Apache::lonhomework::browse ne '2'
803: # && $Apache::lonhomework::browse ne 'F' ) {
804: # $request->print(" You most likely shouldn't see me.");
805: #}
806: #my $t0 = [&gettimeofday()];
807: my $output=1;
808: if ($target eq 'no_output_web') {
809: $target = 'web'; $output=0;
810: }
811: my $problem=&Apache::lonnet::getfile($file);
812: my $result;
813: if ($problem eq -1) {
814: my $filename=(split('/',$file))[-1];
815: $result.="<b> ".&mt('Unable to find')." <i>$filename</i></b>";
816: $problem='';
817: }
818:
819: my %mystyle;
820: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
821: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
822: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
823:
824: &Apache::lonxml::debug("Should be parsing now");
825: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
826: &setup_vars($target),%mystyle);
827: undef($Apache::lonhomework::parsing_a_problem);
828: if (!$output) { $result = ''; }
829: #$request->print("Result follows:");
830: if ($target eq 'modified') {
831: &handle_save_or_undo($request,\$problem,\$result);
832: } else {
833: if ($target eq 'analyze') {
834: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
835: undef(%Apache::lonhomework::analyze);
836: }
837: #my $td=&tv_interval($t0);
838: #if ( $Apache::lonxml::debug) {
839: #$result =~ s:</body>::;
840: #$result.="<br />Spent $td seconds processing target $target\n</body>";
841: #}
842: # $request->print($result);
843: $overall_result.=$result;
844: # $request->rflush();
845: }
846: #$request->print(":Result ends");
847: #my $td=&tv_interval($t0);
848: }
849: if (!$return_string) {
850: &Apache::lonxml::add_messages(\$overall_result);
851: $request->print($overall_result);
852: $request->rflush();
853: } else {
854: return $overall_result;
855: }
856: }
857:
858: # with no arg it returns a HTML <option> list of the template titles
859: # with one arg it returns the filename associated with the arg passed
860: sub get_template_list {
861: my ($namewanted,$extension) = @_;
862: my $result;
863: my @allnames;
864: &Apache::lonxml::debug("Looking for :$extension:");
865: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
866: my $name=&Apache::lonnet::metadata($file,'title');
867: if ($namewanted && ($name eq $namewanted)) {
868: $result=$file;
869: last;
870: } else {
871: if ($name) { push (@allnames, $name); }
872: }
873: }
874: if (@allnames && !$result) {
875: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
876: join('</option><option>',sort(@allnames)).'</option>';
877: }
878: return $result;
879: }
880:
881: sub newproblem {
882: my ($request) = @_;
883: my $extension=$request->uri;
884: $extension=~s:^.*\.([\w]+)$:$1:;
885: &Apache::lonxml::debug("Looking for :$extension:");
886: my $templatelist=&get_template_list('',$extension);
887: if ($env{'form.template'} &&
888: $env{'form.template'} ne "Select a $extension template") {
889: use File::Copy;
890: my $file = &get_template_list($env{'form.template'},$extension);
891: my $dest = &Apache::lonnet::filelocation("",$request->uri);
892: copy($file,$dest);
893: &renderpage($request,$dest);
894: } elsif($env{'form.newfile'} && !$templatelist) {
895: # I don't like hard-coded filenames but for now, this will work.
896: use File::Copy;
897: my $templatefilename =
898: $request->dir_config('lonIncludes').'/templates/blank.problem';
899: &Apache::lonxml::debug("$templatefilename");
900: my $dest = &Apache::lonnet::filelocation("",$request->uri);
901: copy($templatefilename,$dest);
902: &renderpage($request,$dest);
903: } else {
904: my $url=&HTML::Entities::encode($request->uri,'<>&"');
905: my $shownurl=$url;
906: $shownurl=~s-^/~-/priv/-;
907: my $dest = &Apache::lonnet::filelocation("",$request->uri);
908: my $errormsg;
909: if ($env{'form.newfile'}) {
910: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
911: }
912: my $instructions;
913: my $start_page =
914: &Apache::loncommon::start_page("Create New $extension");
915: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
916: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
917: 'resource' => 'resource',
918: 'requested' => 'The requested file',
919: 'not exist' => 'currently does not exist',
920: 'createnew' => 'To create a new',
921: 'click' => 'click on the',
922: 'Create' => 'Create',
923: 'button' => 'button');
924: $request->print(<<ENDNEWPROBLEM);
925: $start_page
926: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
927: $errormsg
928: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
929: <p>
930: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
931: </p>
932: <p><form action="$url" method="POST">
933: ENDNEWPROBLEM
934: if (defined($templatelist)) {
935: $request->print("<select name=\"template\">$templatelist</select>");
936: }
937: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
938: $request->print("</form></p>".&Apache::loncommon::end_page());
939: }
940: return '';
941: }
942:
943: sub handler {
944: #my $t0 = [&gettimeofday()];
945: my $request=$_[0];
946: $Apache::lonxml::request=$request;
947: $Apache::lonxml::debug=$env{'user.debug'};
948: $env{'request.uri'}=$request->uri;
949: &setuppermissions();
950: # some times multiple problemmodes are submitted, need to select
951: # the last one
952: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
953: my $mode=$env{'form.problemmode'}->[-1];
954: undef $env{'form.problemmode'};
955: $env{'form.problemmode'}=$mode;
956: }
957:
958: my $file=&Apache::lonnet::filelocation("",$request->uri);
959:
960: #check if we know where we are
961: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
962: # if we are browsing we might not be able to know where we are
963: if ($Apache::lonhomework::browse ne 'F' &&
964: $env{'request.state'} ne "construct") {
965: #should know where we are, so ask
966: $request->internal_redirect('/adm/ambiguous'); return OK;
967: }
968: }
969: if (&setupheader($request)) { return OK; }
970: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
971: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
972: my ($symb) = &Apache::lonxml::whichuser();
973: &Apache::lonxml::debug('symb is '.$symb);
974: if ($env{'request.state'} eq "construct") {
975: if ( -e $file ) {
976: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
977: ['problemmode']);
978: if (!(defined $env{'form.problemmode'})) {
979: #first visit to problem in construction space
980: $env{'form.problemmode'}='View';
981: &renderpage($request,$file);
982: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
983: $env{'form.problemmode'} eq 'EditXML') {
984: &editxmlmode($request,$file);
985: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
986: &analyze($request,$file);
987: } else {
988: &renderpage($request,$file);
989: }
990: } else {
991: # requested file doesn't exist in contruction space
992: &newproblem($request);
993: }
994: } else {
995: # just render the page normally outside of construction space
996: &Apache::lonxml::debug("not construct");
997: &renderpage($request,$file);
998: }
999: #my $td=&tv_interval($t0);
1000: #&Apache::lonxml::debug("Spent $td seconds processing");
1001: # always turn off debug messages
1002: $Apache::lonxml::debug=0;
1003: return OK;
1004:
1005: }
1006:
1007: 1;
1008: __END__
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