1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.111 2004/12/07 23:23:34 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::response;
30: use strict;
31: use Apache::lonlocal;
32:
33: BEGIN {
34: &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
35: }
36:
37: sub start_response {
38: my ($parstack,$safeeval)=@_;
39: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
40: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
41: if ($#Apache::inputtags::import > -1) {
42: &Apache::lonxml::debug("Turning :$id: into");
43: $id = join('_',@Apache::inputtags::import).'_'.$id;
44: &Apache::lonxml::debug("New :$id:");
45: }
46: push (@Apache::inputtags::response,$id);
47: push (@Apache::inputtags::responselist,$id);
48: @Apache::inputtags::inputlist=();
49: if ($Apache::inputtags::part eq '' &&
50: !$Apache::lonhomework::ignore_response_errors) {
51: &Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
52: }
53: if ($Apache::inputtags::response_with_no_part &&
54: $Apache::inputtags::part ne '0') {
55: &Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
56: }
57: if ($Apache::inputtags::part eq '0') {
58: $Apache::inputtags::response_with_no_part=1;
59: }
60: return $id;
61: }
62:
63: sub end_response {
64: #pop @Apache::inputtags::response;
65: @Apache::inputtags::inputlist=();
66: return '';
67: }
68:
69: sub start_hintresponse {
70: my ($parstack,$safeeval)=@_;
71: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
72: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
73: push (@Apache::inputtags::response,$id);
74: push (@Apache::inputtags::responselist,$id);
75: push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
76: return $id;
77: }
78:
79: sub end_hintresponse {
80: pop @Apache::inputtags::response;
81: if (defined($Apache::inputtags::paramstack[-1])) {
82: %Apache::inputtags::params=
83: @{ pop(@Apache::inputtags::paramstack) };
84: }
85: return '';
86: }
87:
88: my @randomseeds;
89: sub pushrandomnumber {
90: my $rand_alg=&Apache::lonnet::get_rand_alg();
91: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
92: $rand_alg eq '64bit2') {
93: # do nothing
94: } else {
95: my @seed=&Math::Random::random_get_seed();
96: push (@randomseeds,\@seed);
97: }
98: &Apache::response::setrandomnumber();
99: }
100: sub poprandomnumber {
101: my $rand_alg=&Apache::lonnet::get_rand_alg();
102: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
103: $rand_alg eq '64bit2') {
104: return;
105: }
106: my $seed=pop(@randomseeds);
107: if ($seed) {
108: &Math::Random::random_set_seed(@$seed);
109: } else {
110: &Apache::lonxml::error("Unable to restore random algorithm.");
111: }
112: }
113: sub setrandomnumber {
114: my $rndseed;
115: $rndseed=&Apache::structuretags::setup_rndseed();
116: if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
117: &Apache::lonxml::debug("randseed $rndseed");
118: # $rndseed=unpack("%32i",$rndseed);
119: my $rand_alg=&Apache::lonnet::get_rand_alg();
120: my $rndmod;
121: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
122: $rand_alg eq '64bit2') {
123: $rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
124: if (defined($Apache::inputtags::response[-1])) {
125: $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
126: }
127: } elsif ($rand_alg eq '64bit3') {
128: $rndmod=(&Apache::lonnet::numval2($Apache::inputtags::part) << 10);
129: if (defined($Apache::inputtags::response[-1])) {
130: $rndmod+=&Apache::lonnet::numval2($Apache::inputtags::response[-1]);
131: }
132: } else {
133: $rndmod=(&Apache::lonnet::numval3($Apache::inputtags::part) << 10);
134: if (defined($Apache::inputtags::response[-1])) {
135: my $shift=(4*scalar(@Apache::inputtags::response))%20;
136: $rndmod+=(&Apache::lonnet::numval3($Apache::inputtags::response[-1]) << $shift );
137: }
138: }
139: if ($rndseed =~/([,:])/) {
140: my $char=$1;
141: use integer;
142: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
143: $num1+=$rndmod;
144: $num2+=$rndmod;
145: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
146: $rndseed=$num1.$char.$num2;
147: } else {
148: $rndseed+=$rndmod;
149: if($Apache::lonnet::_64bit) {
150: use integer;
151: $rndseed=(($rndseed<<32)>>32);
152: }
153: }
154: &Apache::lonxml::debug("randseed $rndmod $rndseed");
155: &Apache::lonnet::setup_random_from_rndseed($rndseed);
156: return '';
157: }
158:
159: sub meta_parameter_write {
160: my ($name,$type,$default,$display)=@_;
161: my $partref=$Apache::inputtags::part;
162: my $result='<parameter part="'.$Apache::inputtags::part.'"';
163: if (defined($Apache::inputtags::response[-1])) {
164: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
165: $partref.='_'.$Apache::inputtags::response[-1];
166: }
167: $result.= ' name="'.$name.'"'.
168: ' type="'.$type.'"'.
169: (defined($default)?' default="'.$default.'"':'').
170: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
171: .'></parameter>'
172: ."\n";
173: return $result;
174: }
175:
176: sub meta_package_write {
177: my $name=shift;
178: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
179: if(defined($Apache::inputtags::response[-1])) {
180: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
181: }
182: $result.=' package="'.$name.'"></parameter>'."\n";
183: return $result;
184: }
185:
186: sub meta_stores_write {
187: my ($name,$type,$display)=@_;
188: my $partref=$Apache::inputtags::part;
189: my $result = '<stores part="'.$Apache::inputtags::part.'"';
190: if (defined($Apache::inputtags::response[-1])) {
191: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
192: $partref.='_'.$Apache::inputtags::response[-1];
193: }
194: $result.= ' name="'.$name.'"'.
195: ' type="'.$type.'"'.
196: ' display="'.$display.' [Part: '.$partref.']"'.
197: "></stores>\n";
198: }
199:
200: sub mandatory_part_meta {
201: #
202: # Autogenerate metadata for mandatory
203: # input (from RAT or lonparmset) and
204: # output (to lonspreadsheet)
205: # of each part
206: #
207: return
208: # &meta_parameter_write('opendate','date_start','',
209: # 'Opening Date').
210: # &meta_parameter_write('duedate','date_end','',
211: # 'Due Date').
212: # &meta_parameter_write('answerdate','date_start','',
213: # 'Show Answer Date').
214: # &meta_parameter_write('weight','int_zeropos','',
215: # 'Available Points').
216: # &meta_parameter_write('maxtries','int_pos','',
217: # 'Maximum Number of Tries').
218: &meta_package_write('part').
219: &meta_stores_write('solved','string',
220: 'Problem Status').
221: &meta_stores_write('tries','int_zeropos',
222: 'Number of Attempts').
223: &meta_stores_write('awarded','float',
224: 'Partial Credit Factor');
225: #
226: # Note: responseid-specific data 'submission' and 'awarddetail'
227: # not available to spreadsheet -> skip here
228: #
229: }
230:
231: sub meta_part_order {
232: if (@Apache::inputtags::partlist) {
233: my @parts=@Apache::inputtags::partlist;
234: shift(@parts);
235: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
236: } else {
237: return '<partorder>0</partorder>'."\n";
238: }
239: }
240:
241: sub meta_response_order {
242: if (@Apache::inputtags::responselist) {
243: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
244: '</responseorder>'."\n";
245: }
246: }
247:
248: sub check_for_previous {
249: my ($curresponse,$partid,$id) = @_;
250: my %previous;
251: $previous{'used'} = 0;
252: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
253: if ($key =~ /resource\.$partid\.$id\.submission$/) {
254: &Apache::lonxml::debug("Trying $key");
255: my $pastresponse=$Apache::lonhomework::history{$key};
256: if ($pastresponse eq $curresponse) {
257: $previous{'used'} = 1;
258: my $history;
259: if ( $key =~ /^(\d+):/ ) {
260: $history=$1;
261: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
262: $previous{'last'}='0';
263: push(@{ $previous{'version'} },$history);
264: } else {
265: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
266: $previous{'last'}='1';
267: }
268: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
269: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
270: }
271: }
272: }
273: &Apache::lonhomework::showhash(%previous);
274: return %previous;
275: }
276:
277: sub handle_previous {
278: my ($previous,$ad)=@_;
279: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
280: if ($$previous{'last'}) {
281: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
282: push(@Apache::inputtags::previous_version,$$previous{'version'});
283: } elsif ($Apache::lonhomework::type ne 'survey') {
284: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
285: push(@Apache::inputtags::previous_version,$$previous{'version'});
286: }
287: }
288: }
289:
290: sub view_or_modify {
291: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
292: my $myself=0;
293: if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
294: $myself=1;
295: }
296: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
297: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
298: if ($mgr) { return "M"; }
299: if ($vgr) { return "V"; }
300: if ($myself) { return "V"; }
301: return '';
302: }
303:
304: sub start_dataresponse {
305: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
306: my $id = &Apache::response::start_response($parstack,$safeeval);
307: my $result;
308: if ($target eq 'web') {
309: $result = $token->[2]->{'display'}.':';
310: } elsif ($target eq 'meta') {
311: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
312: $token->[2]->{'type'},
313: $token->[2]->{'display'});
314: $result .= &Apache::response::meta_package_write('dataresponse');
315: }
316: return $result;
317: }
318:
319: sub end_dataresponse {
320: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
321: my $result;
322: if ( $target eq 'web' ) {
323: } elsif ($target eq 'grade' ) {
324: if ( defined $ENV{'form.submitted'}) {
325: my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
326: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
327: if ($allowed) {
328: &Apache::response::setup_params('dataresponse',$safeeval);
329: my $partid = $Apache::inputtags::part;
330: my $id = $Apache::inputtags::response['-1'];
331: my $response = $ENV{'form.HWVAL_'.$id};
332: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
333: if ( $response =~ /[^\s]/) {
334: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
335: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
336: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
337: }
338: } else {
339: $result='Not Permitted to change values.'
340: }
341: }
342: }
343: &Apache::response::end_response;
344: return $result;
345: }
346:
347: sub decide_package {
348: my ($tagstack)=@_;
349: my $package;
350: if ($$tagstack[-1] eq 'parameter') {
351: $package='part';
352: } else {
353: my $i=-1;
354: while (defined($$tagstack[$i])) {
355: if ($$tagstack[$i] =~ /(response|hint)$/) {
356: $package=$$tagstack[$i];
357: last;
358: }
359: $i--;
360: }
361: }
362: return $package;
363: }
364:
365: sub start_responseparam {
366: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
367: my $result='';
368: if ($target eq 'meta') {
369: $result = &meta_parameter_write($token->[2]->{'name'},
370: $token->[2]->{'type'},
371: $token->[2]->{'default'},
372: $token->[2]->{'description'});
373: } elsif ($target eq 'edit') {
374: $result.=&Apache::edit::tag_start($target,$token);
375: my $optionlist;
376: my $package=&decide_package($tagstack);
377: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
378: if ($key =~ /^\Q$package\E&(.*)&display$/) {
379: $optionlist.='<option value="'.$1.'">'.
380: $Apache::lonnet::packagetab{$key}.'</option>';
381: }
382: }
383: if (defined($optionlist)) {
384: $result.='Use template: <select name="'.
385: &Apache::edit::html_element_name('parameter_package').'">'.
386: '<option value=""></option>'.$optionlist.'</select><br />';
387: }
388: $result.=&Apache::edit::text_arg('Name:','name',$token).
389: &Apache::edit::text_arg('Type:','type',$token).
390: &Apache::edit::text_arg('Description:','description',$token).
391: &Apache::edit::text_arg('Default:','default',$token).
392: "</td></tr>";
393: $result.=&Apache::edit::end_table;
394: } elsif ($target eq 'modified') {
395: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
396: $safeeval,'name','type',
397: 'description','default');
398: my $element=&Apache::edit::html_element_name('parameter_package');
399: if (defined($ENV{"form.$element"}) && $ENV{"form.$element"} ne '') {
400: my $name=$ENV{"form.$element"};
401: my $tag=&decide_package($tagstack);
402: $token->[2]->{'name'}=$name;
403: $token->[2]->{'type'}=
404: $Apache::lonnet::packagetab{"$tag&$name&type"};
405: $token->[2]->{'description'}=
406: $Apache::lonnet::packagetab{"$tag&$name&display"};
407: $token->[2]->{'default'}=
408: $Apache::lonnet::packagetab{"$tag&$name&default"};
409: $constructtag=1;
410: }
411: if ($constructtag) {
412: $result = &Apache::edit::rebuild_tag($token);
413: $result.=&Apache::edit::handle_insert();
414: }
415: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
416: $target eq 'tex' || $target eq 'analyze' ) {
417: if ($ENV{'request.state'} eq 'construct') {
418: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
419: my $default=&Apache::lonxml::get_param('default',$parstack,
420: $safeeval);
421: if ($name) {$Apache::inputtags::params{$name}=$default;}
422: }
423: }
424: return $result;
425: }
426:
427: sub end_responseparam {
428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
429: if ($target eq 'edit') { return ('','no'); }
430: return '';
431: }
432:
433: sub start_parameter {
434: my $result = &start_responseparam(@_);
435: return $result;
436: }
437:
438: sub end_parameter {
439: my $result = &end_responseparam(@_);
440: return $result;
441: }
442:
443: sub reset_params {
444: %Apache::inputtags::params=();
445: }
446:
447: sub setup_params {
448: my ($tag,$safeeval) = @_;
449:
450: if ($ENV{'request.state'} eq 'construct') { return; }
451: my %paramlist=();
452: foreach my $key (keys(%Apache::lonnet::packagetab)) {
453: if ($key =~ /^$tag/) {
454: my ($package,$name) = split(/&/,$key);
455: $paramlist{$name}=1;
456: }
457: }
458: foreach my $key (keys(%paramlist)) {
459: my $entry= 'resource.'.$Apache::inputtags::part;
460: if (defined($Apache::inputtags::response[-1])) {
461: $entry.='_'.$Apache::inputtags::response[-1];
462: }
463: $entry.='.'.$key;
464: &Apache::lonxml::debug("looking for $entry");
465: my $value = &Apache::lonnet::EXT("$entry");
466: &Apache::lonxml::debug("$key has value :$value:");
467: if ($value eq 'con_lost' || $value =~ /^error:/) {
468: &Apache::lonxml::debug("using nothing");
469: $Apache::inputtags::params{$key}='';
470: } else {
471: my $string="{return qq\0".$value."\0}";
472: my $newvalue=&Apache::run::run($string,$safeeval,1);
473: if (defined($newvalue)) { $value=$newvalue; }
474: $Apache::inputtags::params{$key}=$value;
475: }
476: }
477: }
478:
479: sub answer_header {
480: my ($type) = @_;
481: my $result;
482: if ($ENV{'form.answer_output_mode'} eq 'tex') {
483: $result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
484: $Apache::inputtags::part.'| \\\\ \hline ';
485: } else {
486: $result = '<table border="1"><tr><td>Answer for Part:'.
487: $Apache::inputtags::part. '</td>'."\n";
488: }
489: return $result;
490: }
491:
492: sub answer_part {
493: my ($type,$answer) = @_;
494: my $result;
495: if ($ENV{'form.answer_output_mode'} eq 'tex') {
496: $result = ' \verb|'.$answer.'|\\\\ \hline ';
497: } else {
498: $result = '<td>'.$answer.'</td>';
499: }
500: return $result;
501: }
502:
503: sub answer_footer {
504: my ($type) = @_;
505: my $result;
506: if ($ENV{'form.answer_output_mode'} eq 'tex') {
507: $result = ' \end{tabular} \vskip 0 mm ';
508: } else {
509: $result = '</tr></table>';
510: }
511: return $result;
512: }
513:
514: sub showallfoils {
515: if (defined($ENV{'form.showallfoils'})) {
516: my ($symb)=&Apache::lonxml::whichuser();
517: if ($ENV{'request.state'} eq 'construct' ||
518: ($ENV{'user.adv'} && $symb eq '')) {
519: return 1;
520: }
521: }
522: if ($Apache::lonhomework::type eq 'survey') { return 1; }
523: return 0;
524: }
525:
526: sub getresponse {
527: my ($temp,$resulttype)=@_;
528: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
529: my $response;
530: if (!defined($temp)) {
531: $temp=1;
532: } else {
533: $formparm.=":$temp";
534: }
535: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
536: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
537: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
538: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
539: if ($ENV{'form.submitted'} eq 'scantron') {
540: my $part = $Apache::inputtags::part;
541: my $id = $Apache::inputtags::response[-1];
542: $response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
543: '.answer'};
544: # save bubbled letter for later
545: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
546: $response;
547: if ($resulttype ne 'letter') {
548: if ($resulttype eq 'A is 1') {
549: $response = $let_to_num{$response}+1;
550: } else {
551: $response = $let_to_num{$response};
552: }
553: }
554: } else {
555: $response = $ENV{$formparm};
556: }
557: return $response;
558: }
559:
560: sub repetition {
561: my $id = $Apache::inputtags::part;
562: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
563: my $repetition = int $weight/9;
564: if ($weight % 9 != 0) {$repetition++;}
565: return $repetition;
566: }
567:
568: sub scored_response {
569: my ($part,$id)=@_;
570: my $repetition=&repetition();
571: my $score=0;
572: for (my $i=0;$i<$repetition;$i++) {
573: my $increase=&Apache::response::getresponse($i+1);
574: if ($increase ne '') { $score+=$increase+1; }
575: }
576: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
577: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
578: my $pcr=$score/$weight;
579: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
580: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
581: 'ASSIGNED_SCORE';
582: return $repetition;
583: }
584:
585: sub whichorder {
586: my ($max,$randomize,$showall,$hash)=@_;
587: #&Apache::lonxml::debug("man $max randomize $randomize");
588: if (!defined(@{ $$hash{'names'} })) { return; }
589: my @names = @{ $$hash{'names'} };
590: my @whichopt =();
591: my (%top,@toplist,%bottom,@bottomlist);
592: if (!($showall || ($randomize eq 'no'))) {
593: my $current=0;
594: foreach my $name (@names) {
595: $current++;
596: if ($$hash{"$name.location"} eq 'top') {
597: $top{$name}=$current;
598: } elsif ($$hash{"$name.location"} eq 'bottom') {
599: $bottom{$name}=$current;
600: }
601: }
602: }
603: my $topcount=0;
604: my $bottomcount=0;
605: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
606: && ($#names > -1)) {
607: #&Apache::lonxml::debug("Have $#whichopt max is $max");
608: my $aopt;
609: if ($showall || ($randomize eq 'no')) {
610: $aopt=0;
611: } else {
612: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
613: }
614: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
615: $aopt=splice(@names,$aopt,1);
616: #&Apache::lonxml::debug("Picked $aopt");
617: if ($top{$aopt}) {
618: $toplist[$top{$aopt}]=$aopt;
619: $topcount++;
620: } elsif ($bottom{$aopt}) {
621: $bottomlist[$bottom{$aopt}]=$aopt;
622: $bottomcount++;
623: } else {
624: push (@whichopt,$aopt);
625: }
626: }
627: for (my $i=0;$i<=$#toplist;$i++) {
628: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
629: }
630: for (my $i=0;$i<=$#bottomlist;$i++) {
631: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
632: }
633: return @whichopt;
634: }
635:
636: sub show_answer {
637: my $part = $Apache::inputtags::part;
638: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
639: my $status = $Apache::inputtags::status[-1];
640: return ( ($award =~ /^correct/
641: && lc($Apache::lonhomework::problemstatus) ne 'no')
642: || $status eq "SHOW_ANSWER");
643: }
644:
645: sub analyze_store_foilgroup {
646: my ($shown,$attrs)=@_;
647: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
648: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
649: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
650: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
651: foreach my $attr (@$attrs) {
652: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
653: $Apache::response::foilgroup{"$name.".$attr};
654: }
655: }
656: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
657: }
658:
659: sub check_if_computed {
660: my ($token,$parstack,$safeeval,$name)=@_;
661: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
662: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
663: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
664: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
665: }
666: }
667:
668: sub pick_foil_for_concept {
669: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
670: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
671: my @names = @{ $Apache::response::conceptgroup{'names'} };
672: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
673: my $name=$names[$pick];
674: push @{ $Apache::response::foilgroup{'names'} }, $name;
675: foreach my $attr (@$attrs) {
676: $Apache::response::foilgroup{"$name.".$attr} =
677: $Apache::response::conceptgroup{"$name.".$attr};
678: }
679: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
680: $Apache::response::foilgroup{"$name.concept"} = $concept;
681: &Apache::lonxml::debug("Selecting $name in $concept");
682: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
683: if ($target eq 'analyze') {
684: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
685: $concept);
686: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
687: $Apache::response::conceptgroup{'names'};
688: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
689: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
690: $name);
691: foreach my $attr (@$attrs) {
692: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
693: $Apache::response::conceptgroup{"$name.$attr"};
694: }
695: }
696: }
697: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
698: $hinthash->{"$part_id.concept.$concept"}=
699: $Apache::response::conceptgroup{'names'};
700:
701: }
702:
703: sub get_response_param {
704: my ($id,$name,$default)=@_;
705: my $parameter;
706: if ($ENV{'request.state'} eq 'construct' &&
707: defined($Apache::inputtags::params{$name})) {
708: $parameter=$Apache::inputtags::params{$name};
709: } else {
710: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
711: }
712: if (!defined($parameter) || $parameter eq '') {
713: $parameter = $default;
714: }
715: return $parameter;
716: }
717:
718: 1;
719: __END__
720:
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