1: # The LearningOnline Network with CAPA
2: # The LON-CAPA Homework handler
3: #
4: # $Id: lonhomework.pm,v 1.205 2005/04/29 21:22:33 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: if ($env{'form.grade_target'} eq 'webgrade') {
89: if ($Apache::lonhomework::modifygrades eq 'F' ) {
90: return ($env{'form.grade_target'});
91: }
92: } else {
93: return ($env{'form.grade_target'});
94: }
95: }
96: if ( defined($env{'form.submitted'}) &&
97: ( !defined($env{'form.resetdata'})) &&
98: ( !defined($env{'form.newrandomization'}))) {
99: return ('grade', 'web');
100: } else {
101: return ('web');
102: }
103: } elsif ($env{'request.state'} eq "construct") {
104: if ( defined($env{'form.grade_target'}) ) {
105: return ($env{'form.grade_target'});
106: }
107: if ( defined($env{'form.preview'})) {
108: if ( defined($env{'form.submitted'})) {
109: return ('grade', 'web');
110: } else {
111: return ('web');
112: }
113: } else {
114: if ( $env{'form.problemmode'} eq &mt('View') ||
115: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
116: if ( defined($env{'form.submitted'}) &&
117: (!defined($env{'form.resetdata'})) &&
118: (!defined($env{'form.newrandomization'}))) {
119: return ('grade', 'web','answer');
120: } else {
121: return ('web','answer');
122: }
123: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
124: $env{'form.problemmode'} eq 'Edit') {
125: if ( $env{'form.submitted'} eq 'edit' ) {
126: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
127: return ('modified','web','answer');
128: } else {
129: return ('modified','edit');
130: }
131: } else {
132: return ('edit');
133: }
134: } else {
135: return ('web');
136: }
137: }
138: }
139: return ();
140: }
141:
142: sub setup_vars {
143: my ($target) = @_;
144: return ';'
145: # return ';$external::target='.$target.';';
146: }
147:
148: sub send_header {
149: my ($request)= @_;
150: $request->print(&Apache::lontexconvert::header());
151: # $request->print('<form name='.$env{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
152: }
153:
154: sub createmenu {
155: my ($which,$request)=@_;
156: if ($which eq 'grade') {
157: $request->print('<script language="JavaScript">
158: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
159: "height=350,width=150,menubar=no");
160: </script>');
161: }
162: }
163:
164: sub send_footer {
165: my ($request)= @_;
166: # $request->print('</form>');
167: $request->print(&Apache::lontexconvert::footer());
168: }
169:
170: sub proctor_checked_in {
171: my ($slot)=@_;
172: my @allowed=split(",",$slot->{'proctor'});
173: foreach my $possible (@allowed) {
174: if ($Apache::lonhomework::history{'resource.checkedin'} eq $possible) {
175: return 1;
176: }
177: }
178: return 0;
179: }
180:
181: $Apache::lonxml::browse='';
182: sub check_ip_acc {
183: my ($acc)=@_;
184: if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
185: my $allowed=0;
186: my $ip=$ENV{'REMOTE_ADDR'};
187: my $name;
188: foreach my $pattern (split(',',$acc)) {
189: if ($pattern =~ /\*$/) {
190: #35.8.*
191: $pattern=~s/\*//;
192: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
193: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
194: #35.8.3.[34-56]
195: my $low=$2;
196: my $high=$3;
197: $pattern=$1;
198: if ($ip =~ /^\Q$pattern\E/) {
199: my $last=(split(/\./,$ip))[3];
200: if ($last <=$high && $last >=$low) { $allowed=1; }
201: }
202: } elsif ($pattern =~ /^\*/) {
203: #*.msu.edu
204: $pattern=~s/\*//;
205: if (!defined($name)) {
206: use Socket;
207: my $netaddr=inet_aton($ip);
208: ($name)=gethostbyaddr($netaddr,AF_INET);
209: }
210: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
211: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
212: #127.0.0.1
213: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
214: } else {
215: #some.name.com
216: if (!defined($name)) {
217: use Socket;
218: my $netaddr=inet_aton($ip);
219: ($name)=gethostbyaddr($netaddr,AF_INET);
220: }
221: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
222: }
223: if ($allowed) { last; }
224: }
225: return $allowed;
226: }
227:
228: sub check_task_access {
229: #does it pass normal muster
230: my ($status,$datemsg)=&check_access;
231: if ($status eq 'SHOW_ANSWER' ||
232: $status eq 'CLOSED' ||
233: $status eq 'CANNOT_ANSWER' ||
234: $status eq 'INVALID_ACCESS' ||
235: $status eq 'UNAVAILABLE') {
236: return ($status,$datemsg);
237: }
238: if ($env{'request.state'} eq "construct") {
239: return ($status,$datemsg);
240: }
241:
242: my ($id)=@_;
243: my @slots=split(':',&Apache::lonnet::EXT("resource.$id.available"));
244: # if (!@slots) {
245: # return ($status,$datemsg);
246: # }
247: my $slotstatus='NOT_IN_A_SLOT';
248: my $returned_slot;
249: foreach my $slot (@slots) {
250: &Apache::lonxml::debug("getting $slot");
251: my %slot=&Apache::lonnet::get_slot($slot);
252: &Apache::lonhomework::showhash(%slot);
253: if ($slot{'starttime'} < time &&
254: $slot{'endtime'} > time &&
255: &check_ip_acc($slot{'ip'})) {
256: &Apache::lonxml::debug("$slot is good");
257: $slotstatus='NEEDS_CHECKIN';
258: $returned_slot=\%slot;
259: last;
260: }
261: }
262: if ($slotstatus eq 'NEEDS_CHECKIN' &&
263: &proctor_checked_in($returned_slot)) {
264: &Apache::lonxml::debug("protoctor checked in");
265: $slotstatus='CAN_ANSWER';
266: }
267: return ($slotstatus,$datemsg,$returned_slot);
268: }
269:
270: # JB, 9/24/2002: Any changes in this function may require a change
271: # in lonnavmaps::resource::getDateStatus.
272: sub check_access {
273: my ($id) = @_;
274: my $date ='';
275: my $status;
276: my $datemsg = '';
277: my $lastdate = '';
278: my $temp;
279: my $type;
280: my $passed;
281:
282: if ($env{'request.state'} eq "construct") {
283: if ($env{'form.problemstate'}) {
284: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
285: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
286: lc($Apache::lonhomework::problemstatus) eq 'no')) {
287: return ('CANNOT_ANSWER',
288: &mt('is in this state due to author settings.'));
289: }
290: } else {
291: return ($env{'form.problemstate'},
292: &mt('is in this state due to author settings.'));
293: }
294: }
295: &Apache::lonxml::debug("in construction ignoring dates");
296: $status='CAN_ANSWER';
297: $datemsg=&mt('is in under construction');
298: # return ($status,$datemsg);
299: }
300:
301: &Apache::lonxml::debug("checking for part :$id:");
302: &Apache::lonxml::debug("time:".time);
303:
304: if ($env{'request.state'} ne "construct") {
305: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
306: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
307: $status='INVALID_ACCESS';
308: $date=&mt("can not be accessed from your location.");
309: return($status,$date);
310: }
311:
312: foreach $temp ("opendate","duedate","answerdate") {
313: $lastdate = $date;
314: $date = &Apache::lonnet::EXT("resource.$id.$temp");
315: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
316: if ($thistype =~ /^(con_lost|no_such_host)/ ||
317: $date =~ /^(con_lost|no_such_host)/) {
318: $status='UNAVAILABLE';
319: $date=&mt("may open later.");
320: return($status,$date);
321: }
322: if ($thistype eq 'date_interval') {
323: if ($temp eq 'opendate') {
324: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
325: }
326: if ($temp eq 'answerdate') {
327: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
328: }
329: }
330: &Apache::lonxml::debug("found :$date: for :$temp:");
331: if ($date eq '') {
332: $date = &mt("an unknown date"); $passed = 0;
333: } elsif ($date eq 'con_lost') {
334: $date = &mt("an indeterminate date"); $passed = 0;
335: } else {
336: if (time < $date) { $passed = 0; } else { $passed = 1; }
337: $date = localtime $date;
338: }
339: if (!$passed) { $type=$temp; last; }
340: }
341: &Apache::lonxml::debug("have :$type:$passed:");
342: if ($passed) {
343: $status='SHOW_ANSWER';
344: $datemsg=$date;
345: } elsif ($type eq 'opendate') {
346: $status='CLOSED';
347: $datemsg = &mt("will open on")." $date";
348: } elsif ($type eq 'duedate') {
349: $status='CAN_ANSWER';
350: $datemsg = &mt("is due at")." $date";
351: } elsif ($type eq 'answerdate') {
352: $status='CLOSED';
353: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
354: }
355: }
356: if ($status eq 'CAN_ANSWER') {
357: #check #tries, and if correct.
358: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
359: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
360: if ( $tries eq '' ) { $tries = '0'; }
361: if ( $maxtries eq '' &&
362: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
363: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
364: # if (correct and show prob status) or excused then CANNOT_ANSWER
365: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
366: &&
367: lc($Apache::lonhomework::problemstatus) ne 'no')
368: ||
369: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
370: $status = 'CANNOT_ANSWER';
371: }
372: }
373: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
374: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
375: &Apache::lonxml::debug("looking for interval $interval");
376: if ($interval) {
377: my $first_access=&Apache::lonnet::get_first_access('map');
378: &Apache::lonxml::debug("looking for accesstime $first_access");
379: if (!$first_access) {
380: $status='NOT_YET_VIEWED';
381: $datemsg=&seconds_to_human_length($interval);
382: } else {
383: my $newdate=localtime($first_access+$interval);
384: if (time > ($first_access+$interval)) {
385: $status='CLOSED';
386: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
387: } else {
388: $datemsg = &mt("is due at")." $newdate";
389: }
390: }
391: }
392: }
393: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
394: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
395: # return ('UNCHECKEDOUT','needs to be checked out');
396: #}
397:
398:
399: &Apache::lonxml::debug("sending back :$status:$datemsg:");
400: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
401: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
402: $status='CAN_ANSWER';
403: $datemsg=&mt('is closed but you are allowed to view it');
404: }
405:
406: return ($status,$datemsg);
407: }
408:
409: sub seconds_to_human_length {
410: my ($length)=@_;
411:
412: my $seconds=$length%60; $length=int($length/60);
413: my $minutes=$length%60; $length=int($length/60);
414: my $hours=$length%24; $length=int($length/24);
415: my $days=$length;
416:
417: my $timestr;
418: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
419: if ($hours > 0) { $timestr.=($timestr?", ":"").
420: &mt('[quant,_1,hour]',$hours); }
421: if ($minutes > 0) { $timestr.=($timestr?", ":"").
422: &mt('[quant,_1,minute]',$minutes); }
423: if ($seconds > 0) { $timestr.=($timestr?", ":"").
424: &mt('[quant,_1,second]',$seconds); }
425: return $timestr;
426: }
427:
428: sub showhash {
429: my (%hash) = @_;
430: &showhashsubset(\%hash,'.');
431: return '';
432: }
433:
434: sub showarray {
435: my ($array)=@_;
436: my $string="(";
437: foreach my $elm (@{ $array }) {
438: if (ref($elm) eq 'ARRAY') {
439: $string.=&showarray($elm);
440: } elsif (ref($elm) eq 'HASH') {
441: $string.= "HASH --- \n<br />";
442: $string.= &showhashsubset($elm,'.');
443: } else {
444: $string.="$elm,"
445: }
446: }
447: chop($string);
448: $string.=")";
449: return $string;
450: }
451:
452: sub showhashsubset {
453: my ($hash,$keyre) = @_;
454: my $resultkey;
455: foreach $resultkey (sort keys %$hash) {
456: if ($resultkey !~ /$keyre/) { next; }
457: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
458: &Apache::lonxml::debug("$resultkey ---- ".
459: &showarray($$hash{$resultkey}));
460: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
461: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
462: &showhashsubset($$hash{$resultkey},'.');
463: } else {
464: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
465: }
466: }
467: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
468: return '';
469: }
470:
471: sub setuppermissions {
472: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
473: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
474: if (! $viewgrades &&
475: exists($env{'request.course.sec'}) &&
476: $env{'request.course.sec'} !~ /^\s*$/) {
477: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
478: '/'.$env{'request.course.sec'});
479: }
480: $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
481: if ($Apache::lonhomework::browse eq 'F' &&
482: $env{'form.devalidatecourseresdata'} eq 'on') {
483: my (undef,$courseid) = &Apache::lonxml::whichuser();
484: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
485: $env{"course.$courseid.domain"});
486: }
487: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
488: if (! $modifygrades &&
489: exists($env{'request.course.sec'}) &&
490: $env{'request.course.sec'} !~ /^\s*$/) {
491: $modifygrades =
492: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
493: '/'.$env{'request.course.sec'});
494: }
495: $Apache::lonhomework::modifygrades = $modifygrades;
496: return '';
497: }
498:
499: sub setupheader {
500: my $request=$_[0];
501: &Apache::loncommon::content_type($request,'text/html');
502: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
503: &Apache::loncommon::no_cache($request);
504: }
505: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
506: # 'lastrevisiondate'));
507: $request->send_http_header;
508: return OK if $request->header_only;
509: return ''
510: }
511:
512: sub handle_save_or_undo {
513: my ($request,$problem,$result) = @_;
514: my $file = &Apache::lonnet::filelocation("",$request->uri);
515: my $filebak =$file.".bak";
516: my $filetmp =$file.".tmp";
517: my $error=0;
518:
519: &Apache::lonnet::correct_line_ends($result);
520:
521: if ($env{'form.Undo'} eq &mt('undo')) {
522: my $error=0;
523: if (!copy($file,$filetmp)) { $error=1; }
524: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
525: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
526: if (!$error) {
527: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
528: } else {
529: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
530: $error=1;
531: }
532: } else {
533: my $fs=Apache::File->new(">$filebak");
534: if (defined($fs)) {
535: print $fs $$problem;
536: &Apache::lonxml::info("<b>".&mt("Making Backup to").
537: " $filebak</b>");
538: } else {
539: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
540: $error=2;
541: }
542: my $fh=Apache::File->new(">$file");
543: if (defined($fh)) {
544: print $fh $$result;
545: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
546: " $file</b>");
547: } else {
548: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
549: &mt("Unable to write to")." $file</b></font>");
550: $error|=4;
551: }
552: }
553: return $error;
554: }
555:
556: sub analyze_header {
557: my ($request) = @_;
558: my $bodytag='<body bgcolor="#ffffff">';
559: if ($env{'environment.remote'} eq 'off') {
560: $bodytag=&Apache::loncommon::bodytag();
561: }
562: my $html=&Apache::lonxml::xmlbegin();
563: my $result.=$html.'
564: <head><title>'.&mt("Analyzing a problem").'</title></head>
565: '.$bodytag.&Apache::lonxml::message_location().'
566: <form name="lonhomework" method="POST" action="'.
567: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
568: &Apache::structuretags::remember_problem_state().'
569: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
570: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
571: <hr />
572: <input type="submit" name="submit" value="'.&mt("View").'" />
573: <hr />
574: </form>';
575: &Apache::lonxml::add_messages(\$result);
576: $request->print($result);
577: $request->rflush();
578: }
579:
580: sub analyze_footer {
581: my ($request) = @_;
582: my $result='</body></html>';
583: $request->print($result);
584: $request->rflush();
585: }
586:
587: sub analyze {
588: my ($request,$file) = @_;
589: &Apache::lonxml::debug("Analyze");
590: my $result;
591: my %overall;
592: my %allparts;
593: my $rndseed=$env{'form.rndseed'};
594: &analyze_header($request);
595: my %prog_state=
596: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
597: &mt('Getting Problem Variants'),
598: $env{'form.numtoanalyze'},
599: 'inline',undef);
600: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
601: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
602: &mt('last problem'));
603: if (&Apache::loncommon::connection_aborted($request)) { return; }
604: my $subresult=&Apache::lonnet::ssi($request->uri,
605: ('grade_target' => 'analyze'),
606: ('rndseed' => $i+$rndseed));
607: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
608: my %analyze=&Apache::lonnet::str2hash($subresult);
609: my @parts;
610: if (defined(@{ $analyze{'parts'} })) {
611: @parts=@{ $analyze{'parts'} };
612: }
613: foreach my $part (@parts) {
614: if (!exists($allparts{$part})) {$allparts{$part}=1;};
615: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
616: $analyze{$part.'.type'} eq 'stringresponse' ||
617: $analyze{$part.'.type'} eq 'formularesponse' ) {
618: push( @{ $overall{$part.'.answer'} },
619: [@{ $analyze{$part.'.answer'} }]);
620: }
621: }
622: }
623: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
624: &mt('Analyzing Results'));
625: $request->print('<hr />'.&mt('List of possible answers').': ');
626: foreach my $part (sort(keys(%allparts))) {
627: if (defined(@{ $overall{$part.'.answer'} })) {
628: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
629: $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
630: my %frequency;
631: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
632: $frequency{join("\0",@{ $answer })}++;
633: }
634: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
635: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
636: $request->print('<tr><td align="right">'.
637: join('</td><td align="right">',split("\0",$answer)).
638: '</td><td>('.$frequency{$answer}.
639: ')</td></tr>');
640: }
641: $request->print('</table>');
642: } else {
643: $request->print('<p>'.&mt('Response').' '.$part.' '.
644: &mt('is not analyzable at this time').'</p>');
645: }
646: }
647: if (scalar(keys(%allparts)) == 0 ) {
648: $request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
649: }
650: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
651: &analyze_footer($request);
652: &Apache::lonhomework::showhash(%overall);
653: return $result;
654: }
655:
656: sub editxmlmode {
657: my ($request,$file) = @_;
658: my $result;
659: my $problem=&Apache::lonnet::getfile($file);
660: if ($problem eq -1) {
661: &Apache::lonxml::error("<b> ".&mt('Unable to find').
662: " <i>$file</i></b>");
663: $problem='';
664: }
665: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
666: my $error=&handle_save_or_undo($request,\$problem,
667: \$env{'form.editxmltext'});
668: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
669: }
670: &Apache::lonhomework::showhashsubset(\%env,'^form');
671: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
672: &Apache::lonhomework::showhashsubset(\%env,'^form');
673: $env{'form.problemmode'}='View';
674: &renderpage($request,$file);
675: } else {
676: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
677: my $xml_help = '<table><tr><td>'.
678: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
679: "Problem Editing Help").
680: '</td><td>'.
681: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
682: '</td></tr></table>';
683: if ($cols > 80) { $cols = 80; }
684: if ($cols < 70) { $cols = 70; }
685: if ($rows < 20) { $rows = 20; }
686: my $bodytag='<body bgcolor="#ffffff">';
687: if ($env{'environment.remote'} eq 'off') {
688: $bodytag=&Apache::loncommon::bodytag();
689: }
690: my $html=&Apache::lonxml::xmlbegin();
691: $result.=$html.$bodytag.&Apache::lonxml::message_location().'
692: <form name="lonhomework" method="POST" action="'.
693: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
694: &Apache::structuretags::remember_problem_state().'
695: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
696: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
697: <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
698: <hr />
699: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
700: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
701: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
702: <hr />
703: ' . $xml_help . '
704: <textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
705: &HTML::Entities::encode($problem,'<>&"').'</textarea>
706: </form></body></html>';
707: &Apache::lonxml::add_messages(\$result);
708: $request->print($result);
709: }
710: return '';
711: }
712:
713: #
714: # Render the page in whatever target desired.
715: #
716: sub renderpage {
717: my ($request,$file) = @_;
718:
719: my (@targets) = &get_target();
720: &Apache::lonhomework::showhashsubset(\%env,'form.');
721: &Apache::lonxml::debug("Running targets ".join(':',@targets));
722: my $overall_result;
723: foreach my $target (@targets) {
724: # FIXME need to do something intelligent when a problem goes
725: # from viewable to not viewable due to map conditions
726: #&setuppermissions();
727: #if ( $Apache::lonhomework::browse ne '2'
728: # && $Apache::lonhomework::browse ne 'F' ) {
729: # $request->print(" You most likely shouldn't see me.");
730: #}
731: #my $t0 = [&gettimeofday()];
732: my $problem=&Apache::lonnet::getfile($file);
733: if ($problem eq -1) {
734: &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
735: $problem='';
736: }
737:
738: my %mystyle;
739: my $result = '';
740: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
741: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
742: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
743:
744: &Apache::lonxml::debug("Should be parsing now");
745: $result = &Apache::lonxml::xmlparse($request, $target, $problem,
746: &setup_vars($target),%mystyle);
747: undef($Apache::lonhomework::parsing_a_problem);
748: #$request->print("Result follows:");
749: if ($target eq 'modified') {
750: &handle_save_or_undo($request,\$problem,\$result);
751: } else {
752: if ($target eq 'analyze') {
753: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
754: undef(%Apache::lonhomework::analyze);
755: }
756: #my $td=&tv_interval($t0);
757: #if ( $Apache::lonxml::debug) {
758: #$result =~ s:</body>::;
759: #$result.="<br />Spent $td seconds processing target $target\n</body>";
760: #}
761: # $request->print($result);
762: $overall_result.=$result;
763: # $request->rflush();
764: }
765: #$request->print(":Result ends");
766: #my $td=&tv_interval($t0);
767: }
768: &Apache::lonxml::add_messages(\$overall_result);
769: $request->print($overall_result);
770: $request->rflush();
771: }
772:
773: # with no arg it returns a HTML <option> list of the template titles
774: # with one arg it returns the filename associated with the arg passed
775: sub get_template_list {
776: my ($namewanted,$extension) = @_;
777: my $result;
778: my @allnames;
779: &Apache::lonxml::debug("Looking for :$extension:");
780: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
781: my $name=&Apache::lonnet::metadata($file,'title');
782: if ($namewanted && ($name eq $namewanted)) {
783: $result=$file;
784: last;
785: } else {
786: if ($name) { push (@allnames, $name); }
787: }
788: }
789: if (@allnames && !$result) {
790: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
791: join('</option><option>',sort(@allnames)).'</option>';
792: }
793: return $result;
794: }
795:
796: sub newproblem {
797: my ($request) = @_;
798: my $extension=$request->uri;
799: $extension=~s:^.*\.([\w]+)$:$1:;
800: &Apache::lonxml::debug("Looking for :$extension:");
801: my $templatelist=&get_template_list('',$extension);
802: if ($env{'form.template'} &&
803: $env{'form.template'} ne "Select a $extension template") {
804: use File::Copy;
805: my $file = &get_template_list($env{'form.template'},$extension);
806: my $dest = &Apache::lonnet::filelocation("",$request->uri);
807: copy($file,$dest);
808: &renderpage($request,$dest);
809: } elsif($env{'form.newfile'} && !$templatelist) {
810: # I don't like hard-coded filenames but for now, this will work.
811: use File::Copy;
812: my $templatefilename =
813: $request->dir_config('lonIncludes').'/templates/blank.problem';
814: &Apache::lonxml::debug("$templatefilename");
815: my $dest = &Apache::lonnet::filelocation("",$request->uri);
816: copy($templatefilename,$dest);
817: &renderpage($request,$dest);
818: } else {
819: my $url=&HTML::Entities::encode($request->uri,'<>&"');
820: my $shownurl=$url;
821: $shownurl=~s-^/~-/priv/-;
822: my $dest = &Apache::lonnet::filelocation("",$request->uri);
823: my $errormsg;
824: if ($env{'form.newfile'}) {
825: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
826: }
827: my $instructions;
828: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
829: ($env{'environment.remote'} ne 'off'));
830: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
831: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
832: 'resource' => 'resource',
833: 'requested' => 'The requested file',
834: 'not exist' => 'currently does not exist',
835: 'createnew' => 'To create a new',
836: 'click' => 'click on the',
837: 'Create' => 'Create',
838: 'button' => 'button');
839: $request->print(<<ENDNEWPROBLEM);
840: $bodytag
841: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
842: $errormsg
843: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
844: <p>
845: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
846: </p>
847: <p><form action="$url" method="POST">
848: ENDNEWPROBLEM
849: if (defined($templatelist)) {
850: $request->print("<select name=\"template\">$templatelist</select>");
851: }
852: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
853: $request->print("</form></p></body>");
854: }
855: return '';
856: }
857:
858: sub view_or_edit_menu {
859: my ($request) = @_;
860: my $url=&HTML::Entities::encode($request->uri,'<>&"');
861: my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
862: 'view' => 'View',
863: 'Edit' => 'edit',
864: 'or' => 'or',
865: 'the problem' => 'the problem');
866: $request->print(<<EDITMENU);
867: <body bgcolor="#FFFFFF">
868: <form action="$url" method="POST">
869: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="<{'view'}">
870: <{'or'} <input type="submit" name="problemmode" accesskey="e" value="<{'Edit'}">
871: <{'the problem'}.
872: </form>
873: </body>
874: EDITMENU
875: }
876:
877: sub handler {
878: #my $t0 = [&gettimeofday()];
879: my $request=$_[0];
880:
881: $Apache::lonxml::debug=$env{'user.debug'};
882: $env{'request.uri'}=$request->uri;
883: &setuppermissions();
884: # some times multiple problemmodes are submitted, need to select
885: # the last one
886: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
887: my $mode=$env{'form.problemmode'}->[-1];
888: undef $env{'form.problemmode'};
889: $env{'form.problemmode'}=$mode;
890: }
891:
892: my $file=&Apache::lonnet::filelocation("",$request->uri);
893:
894: #check if we know where we are
895: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
896: # if we are browsing we might not be able to know where we are
897: if ($Apache::lonhomework::browse ne 'F' &&
898: $env{'request.state'} ne "construct") {
899: #should know where we are, so ask
900: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
901: &Apache::lonnet::cleanenv();
902: }
903: &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
904: $request->internal_redirect('/adm/ambiguous'); return OK;
905: }
906: }
907: if (&setupheader($request)) { return OK; }
908: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
909: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
910: my ($symb) = &Apache::lonxml::whichuser();
911: &Apache::lonxml::debug('symb is '.$symb);
912: if ($env{'request.state'} eq "construct" || $symb eq '') {
913: if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
914: $env{'form.resetdata'} eq &mt('New Problem Variation') ||
915: $env{'form.newrandomization'} eq &mt('New Randomization')) {
916: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
917: &Apache::lonnet::tmpreset($symb,'',$domain,$name);
918: &Apache::lonxml::debug("Attempt reset");
919: }
920: }
921: if ($env{'request.state'} eq "construct") {
922: if ( -e $file ) {
923: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
924: ['problemmode']);
925: if (!(defined $env{'form.problemmode'})) {
926: #first visit to problem in construction space
927: #&view_or_edit_menu($request);
928: $env{'form.problemmode'}='View';
929: &renderpage($request,$file);
930: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
931: $env{'form.problemmode'} eq 'EditXML') {
932: &editxmlmode($request,$file);
933: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
934: &analyze($request,$file);
935: } else {
936: &renderpage($request,$file);
937: }
938: } else {
939: # requested file doesn't exist in contruction space
940: &newproblem($request);
941: }
942: } else {
943: # just render the page normally outside of construction space
944: &Apache::lonxml::debug("not construct");
945: &renderpage($request,$file);
946: }
947: #my $td=&tv_interval($t0);
948: #&Apache::lonxml::debug("Spent $td seconds processing");
949: # &Apache::lonhomework::send_footer($request);
950: # always turn off debug messages
951: $Apache::lonxml::debug=0;
952: return OK;
953:
954: }
955:
956: 1;
957: __END__
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