1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.120 2005/04/07 06:56:22 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: use Apache::lonnet;
33:
34: BEGIN {
35: &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse'));
36: }
37:
38: sub start_response {
39: my ($parstack,$safeeval)=@_;
40: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
41: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
42: if ($#Apache::inputtags::import > -1) {
43: &Apache::lonxml::debug("Turning :$id: into");
44: $id = join('_',@Apache::inputtags::import).'_'.$id;
45: &Apache::lonxml::debug("New :$id:");
46: }
47: push (@Apache::inputtags::response,$id);
48: push (@Apache::inputtags::responselist,$id);
49: @Apache::inputtags::inputlist=();
50: if ($Apache::inputtags::part eq '' &&
51: !$Apache::lonhomework::ignore_response_errors) {
52: &Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
53: }
54: if ($Apache::inputtags::response_with_no_part &&
55: $Apache::inputtags::part ne '0') {
56: &Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
57: }
58: if ($Apache::inputtags::part eq '0') {
59: $Apache::inputtags::response_with_no_part=1;
60: }
61: return $id;
62: }
63:
64: sub end_response {
65: #pop @Apache::inputtags::response;
66: @Apache::inputtags::inputlist=();
67: return '';
68: }
69:
70: sub start_hintresponse {
71: my ($parstack,$safeeval)=@_;
72: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
73: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
74: push (@Apache::inputtags::response,$id);
75: push (@Apache::inputtags::responselist,$id);
76: push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
77: return $id;
78: }
79:
80: sub end_hintresponse {
81: pop @Apache::inputtags::response;
82: if (defined($Apache::inputtags::paramstack[-1])) {
83: %Apache::inputtags::params=
84: @{ pop(@Apache::inputtags::paramstack) };
85: }
86: return '';
87: }
88:
89: my @randomseeds;
90: sub pushrandomnumber {
91: my $rand_alg=&Apache::lonnet::get_rand_alg();
92: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
93: $rand_alg eq '64bit2') {
94: # do nothing
95: } else {
96: my @seed=&Math::Random::random_get_seed();
97: push (@randomseeds,\@seed);
98: }
99: &Apache::response::setrandomnumber();
100: }
101: sub poprandomnumber {
102: my $rand_alg=&Apache::lonnet::get_rand_alg();
103: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
104: $rand_alg eq '64bit2') {
105: return;
106: }
107: my $seed=pop(@randomseeds);
108: if ($seed) {
109: &Math::Random::random_set_seed(@$seed);
110: } else {
111: &Apache::lonxml::error("Unable to restore random algorithm.");
112: }
113: }
114:
115: sub setrandomnumber {
116: my $rndseed;
117: $rndseed=&Apache::structuretags::setup_rndseed();
118: if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
119: &Apache::lonxml::debug("randseed $rndseed");
120: # $rndseed=unpack("%32i",$rndseed);
121: my $rand_alg=&Apache::lonnet::get_rand_alg();
122: my $rndmod;
123:
124: my ($id1,$id2,$shift_amt);
125: if ($Apache::lonhomework::parsing_a_problem) {
126: $id1=$Apache::inputtags::part;
127: if (defined($Apache::inputtags::response[-1])) {
128: $id2=$Apache::inputtags::response[-1];
129: }
130: $shift_amt=scalar(@Apache::inputtags::responselist);
131: } elsif ($Apache::lonhomework::parsing_a_task) {
132: $id1=$Apache::bridgetask::dimension;
133: if (defined($Apache::bridgetask::instance[-1])) {
134: $id2=$Apache::bridgetask::instance[-1];
135: }
136: $shift_amt=scalar(@Apache::bridgetask::instance);
137: }
138: &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
139: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
140: $rand_alg eq '64bit2') {
141: $rndmod=(&Apache::lonnet::numval($id1) << 10);
142: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
143: } elsif ($rand_alg eq '64bit3') {
144: $rndmod=(&Apache::lonnet::numval2($id1) << 10);
145: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
146: } else {
147: my $shift=(4*$shift_amt)%30;
148: $rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
149: if (defined($id2)) {
150: $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
151: }
152: }
153: if ($rndseed =~/([,:])/) {
154: my $char=$1;
155: use integer;
156: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
157: $num1+=$rndmod;
158: $num2+=$rndmod;
159: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
160: $rndseed=$num1.$char.$num2;
161: } else {
162: $rndseed+=$rndmod;
163: if($Apache::lonnet::_64bit) {
164: use integer;
165: $rndseed=(($rndseed<<32)>>32);
166: }
167: }
168: &Apache::lonxml::debug("randseed $rndmod $rndseed");
169: &Apache::lonnet::setup_random_from_rndseed($rndseed);
170: return '';
171: }
172:
173: sub meta_parameter_write {
174: my ($name,$type,$default,$display)=@_;
175: my $partref=$Apache::inputtags::part;
176: my $result='<parameter part="'.$Apache::inputtags::part.'"';
177: if (defined($Apache::inputtags::response[-1])) {
178: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
179: $partref.='_'.$Apache::inputtags::response[-1];
180: }
181: $result.= ' name="'.$name.'"'.
182: ' type="'.$type.'"'.
183: (defined($default)?' default="'.$default.'"':'').
184: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
185: .'></parameter>'
186: ."\n";
187: return $result;
188: }
189:
190: sub meta_package_write {
191: my $name=shift;
192: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
193: if(defined($Apache::inputtags::response[-1])) {
194: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
195: }
196: $result.=' package="'.$name.'"></parameter>'."\n";
197: return $result;
198: }
199:
200: sub meta_stores_write {
201: my ($name,$type,$display)=@_;
202: my $partref=$Apache::inputtags::part;
203: my $result = '<stores part="'.$Apache::inputtags::part.'"';
204: if (defined($Apache::inputtags::response[-1])) {
205: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
206: $partref.='_'.$Apache::inputtags::response[-1];
207: }
208: $result.= ' name="'.$name.'"'.
209: ' type="'.$type.'"'.
210: ' display="'.$display.' [Part: '.$partref.']"'.
211: "></stores>\n";
212: }
213:
214: sub mandatory_part_meta {
215: #
216: # Autogenerate metadata for mandatory
217: # input (from RAT or lonparmset) and
218: # output (to lonspreadsheet)
219: # of each part
220: #
221: return
222: # &meta_parameter_write('opendate','date_start','',
223: # 'Opening Date').
224: # &meta_parameter_write('duedate','date_end','',
225: # 'Due Date').
226: # &meta_parameter_write('answerdate','date_start','',
227: # 'Show Answer Date').
228: # &meta_parameter_write('weight','int_zeropos','',
229: # 'Available Points').
230: # &meta_parameter_write('maxtries','int_pos','',
231: # 'Maximum Number of Tries').
232: &meta_package_write('part').
233: &meta_stores_write('solved','string',
234: 'Problem Status').
235: &meta_stores_write('tries','int_zeropos',
236: 'Number of Attempts').
237: &meta_stores_write('awarded','float',
238: 'Partial Credit Factor');
239: #
240: # Note: responseid-specific data 'submission' and 'awarddetail'
241: # not available to spreadsheet -> skip here
242: #
243: }
244:
245: sub meta_part_order {
246: if (@Apache::inputtags::partlist) {
247: my @parts=@Apache::inputtags::partlist;
248: shift(@parts);
249: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
250: } else {
251: return '<partorder>0</partorder>'."\n";
252: }
253: }
254:
255: sub meta_response_order {
256: if (@Apache::inputtags::responselist) {
257: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
258: '</responseorder>'."\n";
259: }
260: }
261:
262: sub check_for_previous {
263: my ($curresponse,$partid,$id) = @_;
264: my %previous;
265: $previous{'used'} = 0;
266: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
267: if ($key =~ /resource\.$partid\.$id\.submission$/) {
268: &Apache::lonxml::debug("Trying $key");
269: my $pastresponse=$Apache::lonhomework::history{$key};
270: if ($pastresponse eq $curresponse) {
271: $previous{'used'} = 1;
272: my $history;
273: if ( $key =~ /^(\d+):/ ) {
274: $history=$1;
275: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
276: $previous{'last'}='0';
277: push(@{ $previous{'version'} },$history);
278: } else {
279: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
280: $previous{'last'}='1';
281: }
282: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
283: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
284: }
285: }
286: }
287: &Apache::lonhomework::showhash(%previous);
288: return %previous;
289: }
290:
291: sub handle_previous {
292: my ($previous,$ad)=@_;
293: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
294: if ($$previous{'last'}) {
295: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
296: push(@Apache::inputtags::previous_version,$$previous{'version'});
297: } elsif ($Apache::lonhomework::type ne 'survey') {
298: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
299: push(@Apache::inputtags::previous_version,$$previous{'version'});
300: }
301: }
302: }
303:
304: sub view_or_modify {
305: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
306: my $myself=0;
307: if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
308: $myself=1;
309: }
310: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
311: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
312: if ($mgr) { return "M"; }
313: if ($vgr) { return "V"; }
314: if ($myself) { return "V"; }
315: return '';
316: }
317:
318: sub start_dataresponse {
319: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
320: my $id = &Apache::response::start_response($parstack,$safeeval);
321: my $result;
322: if ($target eq 'web') {
323: $result = $token->[2]->{'display'}.':';
324: } elsif ($target eq 'meta') {
325: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
326: $token->[2]->{'type'},
327: $token->[2]->{'display'});
328: $result .= &Apache::response::meta_package_write('dataresponse');
329: }
330: return $result;
331: }
332:
333: sub end_dataresponse {
334: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
335: my $result;
336: if ( $target eq 'web' ) {
337: } elsif ($target eq 'grade' ) {
338: if ( defined $env{'form.submitted'}) {
339: my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
340: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
341: if ($allowed) {
342: &Apache::response::setup_params('dataresponse',$safeeval);
343: my $partid = $Apache::inputtags::part;
344: my $id = $Apache::inputtags::response['-1'];
345: my $response = $env{'form.HWVAL_'.$id};
346: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
347: if ( $response =~ /[^\s]/) {
348: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
349: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
350: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
351: }
352: } else {
353: $result='Not Permitted to change values.'
354: }
355: }
356: }
357: &Apache::response::end_response;
358: return $result;
359: }
360:
361: sub decide_package {
362: my ($tagstack)=@_;
363: my $package;
364: if ($$tagstack[-1] eq 'parameter') {
365: $package='part';
366: } else {
367: my $i=-1;
368: while (defined($$tagstack[$i])) {
369: if ($$tagstack[$i] =~ /(response|hint)$/) {
370: $package=$$tagstack[$i];
371: last;
372: }
373: $i--;
374: }
375: }
376: return $package;
377: }
378:
379: sub start_responseparam {
380: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
381: my $result='';
382: if ($target eq 'meta') {
383: $result = &meta_parameter_write($token->[2]->{'name'},
384: $token->[2]->{'type'},
385: $token->[2]->{'default'},
386: $token->[2]->{'description'});
387: } elsif ($target eq 'edit') {
388: $result.=&Apache::edit::tag_start($target,$token);
389: my $optionlist;
390: my $package=&decide_package($tagstack);
391: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
392: if ($key =~ /^\Q$package\E&(.*)&display$/) {
393: $optionlist.='<option value="'.$1.'">'.
394: $Apache::lonnet::packagetab{$key}.'</option>';
395: }
396: }
397: if (defined($optionlist)) {
398: $result.='Use template: <select name="'.
399: &Apache::edit::html_element_name('parameter_package').'">'.
400: '<option value=""></option>'.$optionlist.'</select><br />';
401: }
402: $result.=&Apache::edit::text_arg('Name:','name',$token).
403: &Apache::edit::text_arg('Type:','type',$token).
404: &Apache::edit::text_arg('Description:','description',$token).
405: &Apache::edit::text_arg('Default:','default',$token).
406: "</td></tr>";
407: $result.=&Apache::edit::end_table;
408: } elsif ($target eq 'modified') {
409: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
410: $safeeval,'name','type',
411: 'description','default');
412: my $element=&Apache::edit::html_element_name('parameter_package');
413: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
414: my $name=$env{"form.$element"};
415: my $tag=&decide_package($tagstack);
416: $token->[2]->{'name'}=$name;
417: $token->[2]->{'type'}=
418: $Apache::lonnet::packagetab{"$tag&$name&type"};
419: $token->[2]->{'description'}=
420: $Apache::lonnet::packagetab{"$tag&$name&display"};
421: $token->[2]->{'default'}=
422: $Apache::lonnet::packagetab{"$tag&$name&default"};
423: $constructtag=1;
424: }
425: if ($constructtag) {
426: $result = &Apache::edit::rebuild_tag($token);
427: $result.=&Apache::edit::handle_insert();
428: }
429: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
430: $target eq 'tex' || $target eq 'analyze' ) {
431: if ($env{'request.state'} eq 'construct') {
432: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
433: my $default=&Apache::lonxml::get_param('default',$parstack,
434: $safeeval);
435: if ($name) {$Apache::inputtags::params{$name}=$default;}
436: }
437: }
438: return $result;
439: }
440:
441: sub end_responseparam {
442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
443: if ($target eq 'edit') { return ('','no'); }
444: return '';
445: }
446:
447: sub start_parameter {
448: return &start_responseparam(@_);
449: }
450:
451: sub end_parameter {
452: return &end_responseparam(@_);
453: }
454:
455: sub reset_params {
456: %Apache::inputtags::params=();
457: }
458:
459: sub setup_params {
460: my ($tag,$safeeval) = @_;
461:
462: if ($env{'request.state'} eq 'construct') { return; }
463: my %paramlist=();
464: foreach my $key (keys(%Apache::lonnet::packagetab)) {
465: if ($key =~ /^$tag/) {
466: my ($package,$name) = split(/&/,$key);
467: $paramlist{$name}=1;
468: }
469: }
470: foreach my $key (keys(%paramlist)) {
471: my $entry= 'resource.'.$Apache::inputtags::part;
472: if (defined($Apache::inputtags::response[-1])) {
473: $entry.='_'.$Apache::inputtags::response[-1];
474: }
475: $entry.='.'.$key;
476: &Apache::lonxml::debug("looking for $entry");
477: my $value = &Apache::lonnet::EXT("$entry");
478: &Apache::lonxml::debug("$key has value :$value:");
479: if ($value eq 'con_lost' || $value =~ /^error:/) {
480: &Apache::lonxml::debug("using nothing");
481: $Apache::inputtags::params{$key}='';
482: } else {
483: my $string="{return qq\0".$value."\0}";
484: my $newvalue=&Apache::run::run($string,$safeeval,1);
485: if (defined($newvalue)) { $value=$newvalue; }
486: $Apache::inputtags::params{$key}=$value;
487: }
488: }
489: }
490:
491: sub answer_header {
492: my ($type) = @_;
493: my $result;
494: if ($env{'form.answer_output_mode'} eq 'tex') {
495: $result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: \verb|'.
496: $Apache::inputtags::part.'| \\\\ \hline ';
497: } else {
498: $result = '<table border="1"><tr><td>Answer for Part:'.
499: $Apache::inputtags::part. '</td>'."\n";
500: }
501: return $result;
502: }
503:
504: sub answer_part {
505: my ($type,$answer) = @_;
506: my $result;
507: if ($env{'form.answer_output_mode'} eq 'tex') {
508: $result = ' \verb|'.$answer.'|\\\\ \hline ';
509: } else {
510: $result = '<td>'.$answer.'</td>';
511: }
512: return $result;
513: }
514:
515: sub answer_footer {
516: my ($type) = @_;
517: my $result;
518: if ($env{'form.answer_output_mode'} eq 'tex') {
519: $result = ' \end{tabular} \vskip 0 mm ';
520: } else {
521: $result = '</tr></table>';
522: }
523: return $result;
524: }
525:
526: sub showallfoils {
527: if (defined($env{'form.showallfoils'})) {
528: my ($symb)=&Apache::lonxml::whichuser();
529: if (($env{'request.state'} eq 'construct') ||
530: ($env{'user.adv'} && $symb eq '') ||
531: ($Apache::lonhomework::viewgrades) ) {
532: return 1;
533: }
534: }
535: if ($Apache::lonhomework::type eq 'survey') { return 1; }
536: return 0;
537: }
538:
539: sub getresponse {
540: my ($temp,$resulttype)=@_;
541: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
542: my $response;
543: if (!defined($temp)) {
544: $temp=1;
545: } else {
546: $formparm.=":$temp";
547: }
548: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
549: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
550: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
551: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
552: if ($env{'form.submitted'} eq 'scantron') {
553: my $part = $Apache::inputtags::part;
554: my $id = $Apache::inputtags::response[-1];
555: $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
556: '.answer'};
557: # save bubbled letter for later
558: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
559: $response;
560: if ($resulttype ne 'letter') {
561: if ($resulttype eq 'A is 1') {
562: $response = $let_to_num{$response}+1;
563: } else {
564: $response = $let_to_num{$response};
565: }
566: }
567: } else {
568: $response = $env{$formparm};
569: }
570: return $response;
571: }
572:
573: sub repetition {
574: my $id = $Apache::inputtags::part;
575: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
576: my $repetition = int $weight/9;
577: if ($weight % 9 != 0) {$repetition++;}
578: return $repetition;
579: }
580:
581: sub scored_response {
582: my ($part,$id)=@_;
583: my $repetition=&repetition();
584: my $score=0;
585: for (my $i=0;$i<$repetition;$i++) {
586: my $increase=&Apache::response::getresponse($i+1);
587: if ($increase ne '') { $score+=$increase+1; }
588: }
589: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
590: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
591: my $pcr=$score/$weight;
592: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
593: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
594: 'ASSIGNED_SCORE';
595: return $repetition;
596: }
597:
598: sub whichorder {
599: my ($max,$randomize,$showall,$hash)=@_;
600: #&Apache::lonxml::debug("man $max randomize $randomize");
601: if (!defined(@{ $$hash{'names'} })) { return; }
602: my @names = @{ $$hash{'names'} };
603: my @whichopt =();
604: my (%top,@toplist,%bottom,@bottomlist);
605: if (!($showall || ($randomize eq 'no'))) {
606: my $current=0;
607: foreach my $name (@names) {
608: $current++;
609: if ($$hash{"$name.location"} eq 'top') {
610: $top{$name}=$current;
611: } elsif ($$hash{"$name.location"} eq 'bottom') {
612: $bottom{$name}=$current;
613: }
614: }
615: }
616: my $topcount=0;
617: my $bottomcount=0;
618: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
619: && ($#names > -1)) {
620: #&Apache::lonxml::debug("Have $#whichopt max is $max");
621: my $aopt;
622: if ($showall || ($randomize eq 'no')) {
623: $aopt=0;
624: } else {
625: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
626: }
627: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
628: $aopt=splice(@names,$aopt,1);
629: #&Apache::lonxml::debug("Picked $aopt");
630: if ($top{$aopt}) {
631: $toplist[$top{$aopt}]=$aopt;
632: $topcount++;
633: } elsif ($bottom{$aopt}) {
634: $bottomlist[$bottom{$aopt}]=$aopt;
635: $bottomcount++;
636: } else {
637: push (@whichopt,$aopt);
638: }
639: }
640: for (my $i=0;$i<=$#toplist;$i++) {
641: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
642: }
643: for (my $i=0;$i<=$#bottomlist;$i++) {
644: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
645: }
646: return @whichopt;
647: }
648:
649: sub show_answer {
650: my $part = $Apache::inputtags::part;
651: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
652: my $status = $Apache::inputtags::status[-1];
653: return ( ($award =~ /^correct/
654: && lc($Apache::lonhomework::problemstatus) ne 'no')
655: || $status eq "SHOW_ANSWER");
656: }
657:
658: sub analyze_store_foilgroup {
659: my ($shown,$attrs)=@_;
660: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
661: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
662: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
663: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
664: foreach my $attr (@$attrs) {
665: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
666: $Apache::response::foilgroup{"$name.".$attr};
667: }
668: }
669: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
670: }
671:
672: sub check_if_computed {
673: my ($token,$parstack,$safeeval,$name)=@_;
674: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
675: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
676: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
677: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
678: }
679: }
680:
681: sub pick_foil_for_concept {
682: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
683: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
684: my @names = @{ $Apache::response::conceptgroup{'names'} };
685: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
686: my $name=$names[$pick];
687: push @{ $Apache::response::foilgroup{'names'} }, $name;
688: foreach my $attr (@$attrs) {
689: $Apache::response::foilgroup{"$name.".$attr} =
690: $Apache::response::conceptgroup{"$name.".$attr};
691: }
692: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
693: $Apache::response::foilgroup{"$name.concept"} = $concept;
694: &Apache::lonxml::debug("Selecting $name in $concept");
695: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
696: if ($target eq 'analyze') {
697: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
698: $concept);
699: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
700: $Apache::response::conceptgroup{'names'};
701: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
702: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
703: $name);
704: foreach my $attr (@$attrs) {
705: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
706: $Apache::response::conceptgroup{"$name.$attr"};
707: }
708: }
709: }
710: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
711: $hinthash->{"$part_id.concept.$concept"}=
712: $Apache::response::conceptgroup{'names'};
713:
714: }
715:
716: sub get_response_param {
717: my ($id,$name,$default)=@_;
718: my $parameter;
719: if ($env{'request.state'} eq 'construct' &&
720: defined($Apache::inputtags::params{$name})) {
721: $parameter=$Apache::inputtags::params{$name};
722: } else {
723: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
724: }
725: if (!defined($parameter) || $parameter eq '') {
726: $parameter = $default;
727: }
728: return $parameter;
729: }
730:
731: sub submitted {
732: my ($who)=@_;
733:
734: # when scatron grading any submission is a submission
735: if ($env{'form.submitted'} eq 'scantron') { return 1; }
736: # if the caller only cared if this was a scantron submission
737: if ($who eq 'scantron') { return 0; }
738: # if the Submit Answer button for this particular part was pressed
739: my $partid=$Apache::inputtags::part;
740: if (defined($env{'form.submit_'.$partid})) { return 1; }
741: # otherwise no submission occured
742: return 0;
743: }
744:
745: # basically undef and 0 (both false) mean that they still have work to do
746: # and all true values mean that they can't do any more work
747: #
748: # a return of undef means it is unattempted
749: # a return of 0 means it is attmpted and wrong but still has tries
750: # a return of 1 means it is marked correct
751: # a return of 2 means they have exceed maximum number of tries
752: # a return of 3 means it after the answer date
753: sub check_status {
754: my ($id)=@_;
755: if (!$id) { $id=$Apache::linputtags::part; }
756: my $curtime=&Apache::lonnet::EXT('system.time');
757: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
758: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
759: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
760: if ( $opendate && $curtime > $opendate &&
761: $duedate && $curtime > $duedate &&
762: $answerdate && $curtime > $answerdate) {
763: return 3;
764: }
765: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
766: if ($status =~ /^correct/) { return 1; }
767: if (!$status) { return undef; }
768: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
769: if ($maxtries eq '') { $maxtries=2; }
770: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
771: if ($curtries < $maxtries) { return 0; }
772: return 2;
773: }
774:
775: 1;
776: __END__
777:
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