1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.119 2005/04/04 18:14:58 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:
114: sub setrandomnumber {
115: my $rndseed;
116: $rndseed=&Apache::structuretags::setup_rndseed();
117: if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
118: &Apache::lonxml::debug("randseed $rndseed");
119: # $rndseed=unpack("%32i",$rndseed);
120: my $rand_alg=&Apache::lonnet::get_rand_alg();
121: my $rndmod;
122:
123: my ($id1,$id2,$shift_amt);
124: if ($Apache::lonhomework::parsing_a_problem) {
125: $id1=$Apache::inputtags::part;
126: if (defined($Apache::inputtags::response[-1])) {
127: $id2=$Apache::inputtags::response[-1];
128: }
129: $shift_amt=scalar(@Apache::inputtags::responselist);
130: } elsif ($Apache::lonhomework::parsing_a_task) {
131: $id1=$Apache::bridgetask::dimension;
132: if (defined($Apache::bridgetask::instance[-1])) {
133: $id2=$Apache::bridgetask::instance[-1];
134: }
135: $shift_amt=scalar(@Apache::bridgetask::instance);
136: }
137: &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
138: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
139: $rand_alg eq '64bit2') {
140: $rndmod=(&Apache::lonnet::numval($id1) << 10);
141: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
142: } elsif ($rand_alg eq '64bit3') {
143: $rndmod=(&Apache::lonnet::numval2($id1) << 10);
144: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
145: } else {
146: my $shift=(4*$shift_amt)%30;
147: $rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
148: if (defined($id2)) {
149: $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
150: }
151: }
152: if ($rndseed =~/([,:])/) {
153: my $char=$1;
154: use integer;
155: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
156: $num1+=$rndmod;
157: $num2+=$rndmod;
158: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
159: $rndseed=$num1.$char.$num2;
160: } else {
161: $rndseed+=$rndmod;
162: if($Apache::lonnet::_64bit) {
163: use integer;
164: $rndseed=(($rndseed<<32)>>32);
165: }
166: }
167: &Apache::lonxml::debug("randseed $rndmod $rndseed");
168: &Apache::lonnet::setup_random_from_rndseed($rndseed);
169: return '';
170: }
171:
172: sub meta_parameter_write {
173: my ($name,$type,$default,$display)=@_;
174: my $partref=$Apache::inputtags::part;
175: my $result='<parameter part="'.$Apache::inputtags::part.'"';
176: if (defined($Apache::inputtags::response[-1])) {
177: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
178: $partref.='_'.$Apache::inputtags::response[-1];
179: }
180: $result.= ' name="'.$name.'"'.
181: ' type="'.$type.'"'.
182: (defined($default)?' default="'.$default.'"':'').
183: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
184: .'></parameter>'
185: ."\n";
186: return $result;
187: }
188:
189: sub meta_package_write {
190: my $name=shift;
191: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
192: if(defined($Apache::inputtags::response[-1])) {
193: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
194: }
195: $result.=' package="'.$name.'"></parameter>'."\n";
196: return $result;
197: }
198:
199: sub meta_stores_write {
200: my ($name,$type,$display)=@_;
201: my $partref=$Apache::inputtags::part;
202: my $result = '<stores part="'.$Apache::inputtags::part.'"';
203: if (defined($Apache::inputtags::response[-1])) {
204: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
205: $partref.='_'.$Apache::inputtags::response[-1];
206: }
207: $result.= ' name="'.$name.'"'.
208: ' type="'.$type.'"'.
209: ' display="'.$display.' [Part: '.$partref.']"'.
210: "></stores>\n";
211: }
212:
213: sub mandatory_part_meta {
214: #
215: # Autogenerate metadata for mandatory
216: # input (from RAT or lonparmset) and
217: # output (to lonspreadsheet)
218: # of each part
219: #
220: return
221: # &meta_parameter_write('opendate','date_start','',
222: # 'Opening Date').
223: # &meta_parameter_write('duedate','date_end','',
224: # 'Due Date').
225: # &meta_parameter_write('answerdate','date_start','',
226: # 'Show Answer Date').
227: # &meta_parameter_write('weight','int_zeropos','',
228: # 'Available Points').
229: # &meta_parameter_write('maxtries','int_pos','',
230: # 'Maximum Number of Tries').
231: &meta_package_write('part').
232: &meta_stores_write('solved','string',
233: 'Problem Status').
234: &meta_stores_write('tries','int_zeropos',
235: 'Number of Attempts').
236: &meta_stores_write('awarded','float',
237: 'Partial Credit Factor');
238: #
239: # Note: responseid-specific data 'submission' and 'awarddetail'
240: # not available to spreadsheet -> skip here
241: #
242: }
243:
244: sub meta_part_order {
245: if (@Apache::inputtags::partlist) {
246: my @parts=@Apache::inputtags::partlist;
247: shift(@parts);
248: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
249: } else {
250: return '<partorder>0</partorder>'."\n";
251: }
252: }
253:
254: sub meta_response_order {
255: if (@Apache::inputtags::responselist) {
256: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
257: '</responseorder>'."\n";
258: }
259: }
260:
261: sub check_for_previous {
262: my ($curresponse,$partid,$id) = @_;
263: my %previous;
264: $previous{'used'} = 0;
265: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
266: if ($key =~ /resource\.$partid\.$id\.submission$/) {
267: &Apache::lonxml::debug("Trying $key");
268: my $pastresponse=$Apache::lonhomework::history{$key};
269: if ($pastresponse eq $curresponse) {
270: $previous{'used'} = 1;
271: my $history;
272: if ( $key =~ /^(\d+):/ ) {
273: $history=$1;
274: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
275: $previous{'last'}='0';
276: push(@{ $previous{'version'} },$history);
277: } else {
278: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
279: $previous{'last'}='1';
280: }
281: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
282: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
283: }
284: }
285: }
286: &Apache::lonhomework::showhash(%previous);
287: return %previous;
288: }
289:
290: sub handle_previous {
291: my ($previous,$ad)=@_;
292: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
293: if ($$previous{'last'}) {
294: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
295: push(@Apache::inputtags::previous_version,$$previous{'version'});
296: } elsif ($Apache::lonhomework::type ne 'survey') {
297: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
298: push(@Apache::inputtags::previous_version,$$previous{'version'});
299: }
300: }
301: }
302:
303: sub view_or_modify {
304: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
305: my $myself=0;
306: if ( ($name eq $ENV{'user.name'}) && ($domain eq $ENV{'user.domain'}) ) {
307: $myself=1;
308: }
309: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
310: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
311: if ($mgr) { return "M"; }
312: if ($vgr) { return "V"; }
313: if ($myself) { return "V"; }
314: return '';
315: }
316:
317: sub start_dataresponse {
318: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
319: my $id = &Apache::response::start_response($parstack,$safeeval);
320: my $result;
321: if ($target eq 'web') {
322: $result = $token->[2]->{'display'}.':';
323: } elsif ($target eq 'meta') {
324: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
325: $token->[2]->{'type'},
326: $token->[2]->{'display'});
327: $result .= &Apache::response::meta_package_write('dataresponse');
328: }
329: return $result;
330: }
331:
332: sub end_dataresponse {
333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
334: my $result;
335: if ( $target eq 'web' ) {
336: } elsif ($target eq 'grade' ) {
337: if ( defined $ENV{'form.submitted'}) {
338: my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
339: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
340: if ($allowed) {
341: &Apache::response::setup_params('dataresponse',$safeeval);
342: my $partid = $Apache::inputtags::part;
343: my $id = $Apache::inputtags::response['-1'];
344: my $response = $ENV{'form.HWVAL_'.$id};
345: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
346: if ( $response =~ /[^\s]/) {
347: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
348: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
349: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
350: }
351: } else {
352: $result='Not Permitted to change values.'
353: }
354: }
355: }
356: &Apache::response::end_response;
357: return $result;
358: }
359:
360: sub decide_package {
361: my ($tagstack)=@_;
362: my $package;
363: if ($$tagstack[-1] eq 'parameter') {
364: $package='part';
365: } else {
366: my $i=-1;
367: while (defined($$tagstack[$i])) {
368: if ($$tagstack[$i] =~ /(response|hint)$/) {
369: $package=$$tagstack[$i];
370: last;
371: }
372: $i--;
373: }
374: }
375: return $package;
376: }
377:
378: sub start_responseparam {
379: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
380: my $result='';
381: if ($target eq 'meta') {
382: $result = &meta_parameter_write($token->[2]->{'name'},
383: $token->[2]->{'type'},
384: $token->[2]->{'default'},
385: $token->[2]->{'description'});
386: } elsif ($target eq 'edit') {
387: $result.=&Apache::edit::tag_start($target,$token);
388: my $optionlist;
389: my $package=&decide_package($tagstack);
390: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
391: if ($key =~ /^\Q$package\E&(.*)&display$/) {
392: $optionlist.='<option value="'.$1.'">'.
393: $Apache::lonnet::packagetab{$key}.'</option>';
394: }
395: }
396: if (defined($optionlist)) {
397: $result.='Use template: <select name="'.
398: &Apache::edit::html_element_name('parameter_package').'">'.
399: '<option value=""></option>'.$optionlist.'</select><br />';
400: }
401: $result.=&Apache::edit::text_arg('Name:','name',$token).
402: &Apache::edit::text_arg('Type:','type',$token).
403: &Apache::edit::text_arg('Description:','description',$token).
404: &Apache::edit::text_arg('Default:','default',$token).
405: "</td></tr>";
406: $result.=&Apache::edit::end_table;
407: } elsif ($target eq 'modified') {
408: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
409: $safeeval,'name','type',
410: 'description','default');
411: my $element=&Apache::edit::html_element_name('parameter_package');
412: if (defined($ENV{"form.$element"}) && $ENV{"form.$element"} ne '') {
413: my $name=$ENV{"form.$element"};
414: my $tag=&decide_package($tagstack);
415: $token->[2]->{'name'}=$name;
416: $token->[2]->{'type'}=
417: $Apache::lonnet::packagetab{"$tag&$name&type"};
418: $token->[2]->{'description'}=
419: $Apache::lonnet::packagetab{"$tag&$name&display"};
420: $token->[2]->{'default'}=
421: $Apache::lonnet::packagetab{"$tag&$name&default"};
422: $constructtag=1;
423: }
424: if ($constructtag) {
425: $result = &Apache::edit::rebuild_tag($token);
426: $result.=&Apache::edit::handle_insert();
427: }
428: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
429: $target eq 'tex' || $target eq 'analyze' ) {
430: if ($ENV{'request.state'} eq 'construct') {
431: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
432: my $default=&Apache::lonxml::get_param('default',$parstack,
433: $safeeval);
434: if ($name) {$Apache::inputtags::params{$name}=$default;}
435: }
436: }
437: return $result;
438: }
439:
440: sub end_responseparam {
441: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
442: if ($target eq 'edit') { return ('','no'); }
443: return '';
444: }
445:
446: sub start_parameter {
447: return &start_responseparam(@_);
448: }
449:
450: sub end_parameter {
451: return &end_responseparam(@_);
452: }
453:
454: sub reset_params {
455: %Apache::inputtags::params=();
456: }
457:
458: sub setup_params {
459: my ($tag,$safeeval) = @_;
460:
461: if ($ENV{'request.state'} eq 'construct') { return; }
462: my %paramlist=();
463: foreach my $key (keys(%Apache::lonnet::packagetab)) {
464: if ($key =~ /^$tag/) {
465: my ($package,$name) = split(/&/,$key);
466: $paramlist{$name}=1;
467: }
468: }
469: foreach my $key (keys(%paramlist)) {
470: my $entry= 'resource.'.$Apache::inputtags::part;
471: if (defined($Apache::inputtags::response[-1])) {
472: $entry.='_'.$Apache::inputtags::response[-1];
473: }
474: $entry.='.'.$key;
475: &Apache::lonxml::debug("looking for $entry");
476: my $value = &Apache::lonnet::EXT("$entry");
477: &Apache::lonxml::debug("$key has value :$value:");
478: if ($value eq 'con_lost' || $value =~ /^error:/) {
479: &Apache::lonxml::debug("using nothing");
480: $Apache::inputtags::params{$key}='';
481: } else {
482: my $string="{return qq\0".$value."\0}";
483: my $newvalue=&Apache::run::run($string,$safeeval,1);
484: if (defined($newvalue)) { $value=$newvalue; }
485: $Apache::inputtags::params{$key}=$value;
486: }
487: }
488: }
489:
490: sub answer_header {
491: my ($type) = @_;
492: my $result;
493: if ($ENV{'form.answer_output_mode'} eq 'tex') {
494: $result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
495: $Apache::inputtags::part.'| \\\\ \hline ';
496: } else {
497: $result = '<table border="1"><tr><td>Answer for Part:'.
498: $Apache::inputtags::part. '</td>'."\n";
499: }
500: return $result;
501: }
502:
503: sub answer_part {
504: my ($type,$answer) = @_;
505: my $result;
506: if ($ENV{'form.answer_output_mode'} eq 'tex') {
507: $result = ' \verb|'.$answer.'|\\\\ \hline ';
508: } else {
509: $result = '<td>'.$answer.'</td>';
510: }
511: return $result;
512: }
513:
514: sub answer_footer {
515: my ($type) = @_;
516: my $result;
517: if ($ENV{'form.answer_output_mode'} eq 'tex') {
518: $result = ' \end{tabular} \vskip 0 mm ';
519: } else {
520: $result = '</tr></table>';
521: }
522: return $result;
523: }
524:
525: sub showallfoils {
526: if (defined($ENV{'form.showallfoils'})) {
527: my ($symb)=&Apache::lonxml::whichuser();
528: if (($ENV{'request.state'} eq 'construct') ||
529: ($ENV{'user.adv'} && $symb eq '') ||
530: ($Apache::lonhomework::viewgrades) ) {
531: return 1;
532: }
533: }
534: if ($Apache::lonhomework::type eq 'survey') { return 1; }
535: return 0;
536: }
537:
538: sub getresponse {
539: my ($temp,$resulttype)=@_;
540: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
541: my $response;
542: if (!defined($temp)) {
543: $temp=1;
544: } else {
545: $formparm.=":$temp";
546: }
547: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
548: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
549: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
550: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
551: if ($ENV{'form.submitted'} eq 'scantron') {
552: my $part = $Apache::inputtags::part;
553: my $id = $Apache::inputtags::response[-1];
554: $response = $ENV{'scantron.'.($Apache::lonxml::counter+$temp-1).
555: '.answer'};
556: # save bubbled letter for later
557: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
558: $response;
559: if ($resulttype ne 'letter') {
560: if ($resulttype eq 'A is 1') {
561: $response = $let_to_num{$response}+1;
562: } else {
563: $response = $let_to_num{$response};
564: }
565: }
566: } else {
567: $response = $ENV{$formparm};
568: }
569: return $response;
570: }
571:
572: sub repetition {
573: my $id = $Apache::inputtags::part;
574: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
575: my $repetition = int $weight/9;
576: if ($weight % 9 != 0) {$repetition++;}
577: return $repetition;
578: }
579:
580: sub scored_response {
581: my ($part,$id)=@_;
582: my $repetition=&repetition();
583: my $score=0;
584: for (my $i=0;$i<$repetition;$i++) {
585: my $increase=&Apache::response::getresponse($i+1);
586: if ($increase ne '') { $score+=$increase+1; }
587: }
588: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
589: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
590: my $pcr=$score/$weight;
591: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
592: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
593: 'ASSIGNED_SCORE';
594: return $repetition;
595: }
596:
597: sub whichorder {
598: my ($max,$randomize,$showall,$hash)=@_;
599: #&Apache::lonxml::debug("man $max randomize $randomize");
600: if (!defined(@{ $$hash{'names'} })) { return; }
601: my @names = @{ $$hash{'names'} };
602: my @whichopt =();
603: my (%top,@toplist,%bottom,@bottomlist);
604: if (!($showall || ($randomize eq 'no'))) {
605: my $current=0;
606: foreach my $name (@names) {
607: $current++;
608: if ($$hash{"$name.location"} eq 'top') {
609: $top{$name}=$current;
610: } elsif ($$hash{"$name.location"} eq 'bottom') {
611: $bottom{$name}=$current;
612: }
613: }
614: }
615: my $topcount=0;
616: my $bottomcount=0;
617: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
618: && ($#names > -1)) {
619: #&Apache::lonxml::debug("Have $#whichopt max is $max");
620: my $aopt;
621: if ($showall || ($randomize eq 'no')) {
622: $aopt=0;
623: } else {
624: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
625: }
626: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
627: $aopt=splice(@names,$aopt,1);
628: #&Apache::lonxml::debug("Picked $aopt");
629: if ($top{$aopt}) {
630: $toplist[$top{$aopt}]=$aopt;
631: $topcount++;
632: } elsif ($bottom{$aopt}) {
633: $bottomlist[$bottom{$aopt}]=$aopt;
634: $bottomcount++;
635: } else {
636: push (@whichopt,$aopt);
637: }
638: }
639: for (my $i=0;$i<=$#toplist;$i++) {
640: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
641: }
642: for (my $i=0;$i<=$#bottomlist;$i++) {
643: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
644: }
645: return @whichopt;
646: }
647:
648: sub show_answer {
649: my $part = $Apache::inputtags::part;
650: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
651: my $status = $Apache::inputtags::status[-1];
652: return ( ($award =~ /^correct/
653: && lc($Apache::lonhomework::problemstatus) ne 'no')
654: || $status eq "SHOW_ANSWER");
655: }
656:
657: sub analyze_store_foilgroup {
658: my ($shown,$attrs)=@_;
659: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
660: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
661: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
662: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
663: foreach my $attr (@$attrs) {
664: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
665: $Apache::response::foilgroup{"$name.".$attr};
666: }
667: }
668: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
669: }
670:
671: sub check_if_computed {
672: my ($token,$parstack,$safeeval,$name)=@_;
673: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
674: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
675: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
676: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
677: }
678: }
679:
680: sub pick_foil_for_concept {
681: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
682: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
683: my @names = @{ $Apache::response::conceptgroup{'names'} };
684: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
685: my $name=$names[$pick];
686: push @{ $Apache::response::foilgroup{'names'} }, $name;
687: foreach my $attr (@$attrs) {
688: $Apache::response::foilgroup{"$name.".$attr} =
689: $Apache::response::conceptgroup{"$name.".$attr};
690: }
691: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
692: $Apache::response::foilgroup{"$name.concept"} = $concept;
693: &Apache::lonxml::debug("Selecting $name in $concept");
694: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
695: if ($target eq 'analyze') {
696: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
697: $concept);
698: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
699: $Apache::response::conceptgroup{'names'};
700: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
701: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
702: $name);
703: foreach my $attr (@$attrs) {
704: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
705: $Apache::response::conceptgroup{"$name.$attr"};
706: }
707: }
708: }
709: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
710: $hinthash->{"$part_id.concept.$concept"}=
711: $Apache::response::conceptgroup{'names'};
712:
713: }
714:
715: sub get_response_param {
716: my ($id,$name,$default)=@_;
717: my $parameter;
718: if ($ENV{'request.state'} eq 'construct' &&
719: defined($Apache::inputtags::params{$name})) {
720: $parameter=$Apache::inputtags::params{$name};
721: } else {
722: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
723: }
724: if (!defined($parameter) || $parameter eq '') {
725: $parameter = $default;
726: }
727: return $parameter;
728: }
729:
730: sub submitted {
731: my ($who)=@_;
732:
733: # when scatron grading any submission is a submission
734: if ($ENV{'form.submitted'} eq 'scantron') { return 1; }
735: # if the caller only cared if this was a scantron submission
736: if ($who eq 'scantron') { return 0; }
737: # if the Submit Answer button for this particular part was pressed
738: my $partid=$Apache::inputtags::part;
739: if (defined($ENV{'form.submit_'.$partid})) { return 1; }
740: # otherwise no submission occured
741: return 0;
742: }
743:
744: # basically undef and 0 (both false) mean that they still have work to do
745: # and all true values mean that they can't do any more work
746: #
747: # a return of undef means it is unattempted
748: # a return of 0 means it is attmpted and wrong but still has tries
749: # a return of 1 means it is marked correct
750: # a return of 2 means they have exceed maximum number of tries
751: # a return of 3 means it after the answer date
752: sub check_status {
753: my ($id)=@_;
754: if (!$id) { $id=$Apache::linputtags::part; }
755: my $curtime=&Apache::lonnet::EXT('system.time');
756: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
757: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
758: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
759: if ( $opendate && $curtime > $opendate &&
760: $duedate && $curtime > $duedate &&
761: $answerdate && $curtime > $answerdate) {
762: return 3;
763: }
764: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
765: if ($status =~ /^correct/) { return 1; }
766: if (!$status) { return undef; }
767: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
768: if ($maxtries eq '') { $maxtries=2; }
769: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
770: if ($curtries < $maxtries) { return 0; }
771: return 2;
772: }
773:
774: 1;
775: __END__
776:
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