1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.163 2007/04/18 00:19:37 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: use Apache::lonmaxima();
34:
35: BEGIN {
36: &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse','customresponse','mathresponse'));
37: }
38:
39: sub start_response {
40: my ($parstack,$safeeval)=@_;
41: my $id = &Apache::lonxml::get_id($parstack,$safeeval);
42: if ($#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 $id = &Apache::lonxml::get_id($parstack,$safeeval);
73: push (@Apache::inputtags::hint,$id);
74: push (@Apache::inputtags::hintlist,$id);
75: push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
76: return $id;
77: }
78:
79: sub end_hintresponse {
80: pop @Apache::inputtags::hint;
81: if (defined($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(@$seed);
109: } else {
110: &Apache::lonxml::error("Unable to restore random algorithm.");
111: }
112: }
113:
114: sub setrandomnumber {
115: my ($ignore_id2) = @_;
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,$rndmod2);
123:
124: my ($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: $id1=&Apache::bridgetask::get_dim_id();
133: if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
134: $id2=$Apache::bridgetask::instance{$id1}[-1];
135: $shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
136: } else {
137: $shift_amt=0;
138: }
139: }
140: &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
141: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
142: $rand_alg eq '64bit2') {
143: $rndmod=(&Apache::lonnet::numval($id1) << 10);
144: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
145: } elsif ($rand_alg eq '64bit3') {
146: $rndmod=(&Apache::lonnet::numval2($id1) << 10);
147: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
148: } elsif ($rand_alg eq '64bit4') {
149: my $shift=(4*$shift_amt)%30;
150: $rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
151: if (defined($id2)) {
152: $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
153: }
154: } else {
155: ($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
156: }
157:
158: if ($rndseed =~/([,:])/) {
159: my $char=$1;
160: use integer;
161: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
162: $num1+=$rndmod;
163: $num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
164: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
165: $rndseed=$num1.$char.$num2;
166: } else {
167: $rndseed+=$rndmod;
168: if($Apache::lonnet::_64bit) {
169: use integer;
170: $rndseed=(($rndseed<<32)>>32);
171: }
172: }
173: &Apache::lonxml::debug("randseed $rndmod $rndseed");
174: &Apache::lonnet::setup_random_from_rndseed($rndseed);
175: return '';
176: }
177:
178: sub meta_parameter_write {
179: my ($name,$type,$default,$display)=@_;
180: my $partref=$Apache::inputtags::part;
181: my $result='<parameter part="'.$Apache::inputtags::part.'"';
182: if (defined($Apache::inputtags::response[-1])) {
183: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
184: $partref.='_'.$Apache::inputtags::response[-1];
185: }
186: $result.= ' name="'.$name.'"'.
187: ' type="'.$type.'"'.
188: (defined($default)?' default="'.$default.'"':'').
189: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
190: .'></parameter>'
191: ."\n";
192: return $result;
193: }
194:
195: sub meta_package_write {
196: my $name=shift;
197: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
198: if(defined($Apache::inputtags::response[-1])) {
199: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
200: }
201: $result.=' package="'.$name.'"></parameter>'."\n";
202: return $result;
203: }
204:
205: sub meta_stores_write {
206: my ($name,$type,$display)=@_;
207: my $partref=$Apache::inputtags::part;
208: my $result = '<stores part="'.$Apache::inputtags::part.'"';
209: if (defined($Apache::inputtags::response[-1])) {
210: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
211: $partref.='_'.$Apache::inputtags::response[-1];
212: }
213: $result.= ' name="'.$name.'"'.
214: ' type="'.$type.'"'.
215: ' display="'.$display.' [Part: '.$partref.']"'.
216: "></stores>\n";
217: }
218:
219: sub mandatory_part_meta {
220: #
221: # Autogenerate metadata for mandatory
222: # input (from RAT or lonparmset) and
223: # output (to lonspreadsheet)
224: # of each part
225: #
226: return
227: # &meta_parameter_write('opendate','date_start','',
228: # 'Opening Date').
229: # &meta_parameter_write('duedate','date_end','',
230: # 'Due Date').
231: # &meta_parameter_write('answerdate','date_start','',
232: # 'Show Answer Date').
233: # &meta_parameter_write('weight','int_zeropos','',
234: # 'Available Points').
235: # &meta_parameter_write('maxtries','int_pos','',
236: # 'Maximum Number of Tries').
237: &meta_package_write('part').
238: &meta_stores_write('solved','string',
239: 'Problem Status').
240: &meta_stores_write('tries','int_zeropos',
241: 'Number of Attempts').
242: &meta_stores_write('awarded','float',
243: 'Partial Credit Factor');
244: #
245: # Note: responseid-specific data 'submission' and 'awarddetail'
246: # not available to spreadsheet -> skip here
247: #
248: }
249:
250: sub meta_part_order {
251: if (@Apache::inputtags::partlist) {
252: my @parts=@Apache::inputtags::partlist;
253: shift(@parts);
254: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
255: } else {
256: return '<partorder>0</partorder>'."\n";
257: }
258: }
259:
260: sub meta_response_order {
261: if (@Apache::inputtags::responselist) {
262: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
263: '</responseorder>'."\n";
264: }
265: }
266:
267: sub check_for_previous {
268: my ($curresponse,$partid,$id,$last) = @_;
269: my %previous;
270: $previous{'used'} = 0;
271: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
272: if ($key =~ /resource\.$partid\.$id\.submission$/) {
273: if ( $last && $key =~ /^(\d+):/ ) {
274: next if ($1 >= $last);
275: }
276: &Apache::lonxml::debug("Trying $key");
277: my $pastresponse=$Apache::lonhomework::history{$key};
278: if ($pastresponse eq $curresponse) {
279: $previous{'used'} = 1;
280: my $history;
281: if ( $key =~ /^(\d+):/ ) {
282: $history=$1;
283: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
284: $previous{'last'}='0';
285: push(@{ $previous{'version'} },$history);
286: } else {
287: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
288: $previous{'last'}='1';
289: }
290: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
291: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
292: }
293: }
294: }
295: &Apache::lonhomework::showhash(%previous);
296: return %previous;
297: }
298:
299: sub handle_previous {
300: my ($previous,$ad)=@_;
301: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
302: if ($$previous{'last'}) {
303: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
304: push(@Apache::inputtags::previous_version,$$previous{'version'});
305: } elsif ($Apache::lonhomework::type ne 'survey') {
306: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
307: push(@Apache::inputtags::previous_version,$$previous{'version'});
308: }
309: }
310: }
311:
312: sub view_or_modify {
313: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
314: my $myself=0;
315: if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
316: $myself=1;
317: }
318: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
319: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
320: if ($mgr) { return "M"; }
321: if ($vgr) { return "V"; }
322: if ($myself) { return "V"; }
323: return '';
324: }
325:
326: sub start_dataresponse {
327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
328: my $id = &Apache::response::start_response($parstack,$safeeval);
329: my $result;
330: if ($target eq 'web') {
331: $result = $token->[2]->{'display'}.':';
332: } elsif ($target eq 'meta') {
333: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
334: $token->[2]->{'type'},
335: $token->[2]->{'display'});
336: $result .= &Apache::response::meta_package_write('dataresponse');
337: }
338: return $result;
339: }
340:
341: sub end_dataresponse {
342: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
343: my $result;
344: if ( $target eq 'web' ) {
345: } elsif ($target eq 'grade' ) {
346: if ( defined $env{'form.submitted'}) {
347: my ($symb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
348: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
349: if ($allowed) {
350: &Apache::response::setup_params('dataresponse',$safeeval);
351: my $partid = $Apache::inputtags::part;
352: my $id = $Apache::inputtags::response['-1'];
353: my $response = $env{'form.HWVAL_'.$id};
354: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
355: if ( $response =~ /[^\s]/) {
356: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
357: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
358: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
359: }
360: } else {
361: $result='Not Permitted to change values.'
362: }
363: }
364: }
365: &Apache::response::end_response;
366: return $result;
367: }
368:
369: sub start_customresponse {
370: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
371: my $id = &Apache::response::start_response($parstack,$safeeval);
372: push(@Apache::lonxml::namespace,'customresponse');
373: my $result;
374: @Apache::response::custom_answer=();
375: @Apache::response::custom_answer_type=();
376: &Apache::lonxml::register('Apache::response',('answer'));
377: if ($target eq 'web') {
378: if ( &Apache::response::show_answer() ) {
379: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
380: $safeeval);
381: $Apache::inputtags::answertxt{$id}=[$answer];
382: }
383: } elsif ($target eq 'edit') {
384: $result.=&Apache::edit::tag_start($target,$token);
385: $result.=&Apache::edit::text_arg('String to display for answer:',
386: 'answerdisplay',$token);
387: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
388: } elsif ($target eq 'modified') {
389: my $constructtag;
390: $constructtag=&Apache::edit::get_new_args($token,$parstack,
391: $safeeval,'answerdisplay');
392: if ($constructtag) {
393: $result = &Apache::edit::rebuild_tag($token);
394: $result.=&Apache::edit::handle_insert();
395: }
396: } elsif ($target eq 'answer' || $target eq 'grade') {
397: &Apache::response::reset_params();
398: } elsif ($target eq 'meta') {
399: $result .= &Apache::response::meta_package_write('customresponse');
400: }
401: return $result;
402: }
403:
404: sub end_customresponse {
405: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
406: my $result;
407: my $part=$Apache::inputtags::part;
408: my $id=$Apache::inputtags::response[-1];
409: if ( $target eq 'grade' && &Apache::response::submitted() ) {
410: my $response = &Apache::response::getresponse();
411: if ($Apache::lonhomework::type eq 'exam' ||
412: &Apache::response::submitted('scantron')) {
413: &Apache::response::scored_response($part,$id);
414: } elsif ( $response =~ /[^\s]/ &&
415: $Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
416: if (!$Apache::lonxml::default_homework_loaded) {
417: &Apache::lonxml::default_homework_load($safeeval);
418: }
419: my %previous = &Apache::response::check_for_previous($response,
420: $part,$id);
421: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
422: $response;
423: my $error;
424: ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
425: $response;
426:
427: my $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
428: if (!&Apache::inputtags::valid_award($award)) {
429: $error = $award;
430: $award = 'ERROR';
431: }
432: &Apache::response::handle_previous(\%previous,$award);
433: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
434: $award;
435: if ($error) {
436: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
437: $error;
438: }
439: }
440: } elsif ( $target eq 'answer') {
441: $result = &Apache::response::answer_header('customresponse');
442: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
443: $safeeval);
444: if ($env{'form.answer_output_mode'} ne 'tex') {
445: $answer = '<b>'.$answer.'</b>';
446: }
447: $result .= &Apache::response::answer_part('customresponse',$answer);
448: $result .= &Apache::response::answer_footer('customresponse');
449: }
450: if ($target eq 'web') {
451: &setup_prior_tries_hash(\&format_prior_response_math);
452: }
453: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
454: $target eq 'tex' || $target eq 'analyze') {
455: &Apache::lonxml::increment_counter(&Apache::response::repetition());
456: }
457: pop(@Apache::lonxml::namespace);
458: pop(@Apache::response::custom_answer);
459: pop(@Apache::response::custom_answer_type);
460: &Apache::lonxml::deregister('Apache::response',('answer'));
461: &Apache::response::end_response();
462: return $result;
463: }
464:
465: sub format_prior_response_custom {
466: my ($mode,$answer) =@_;
467: return '<span class="LC_prior_custom">'.
468: &HTML::Entities::encode($answer,'"<>&').'</span>';
469: }
470:
471: sub start_mathresponse {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
473: my $id = &Apache::response::start_response($parstack,$safeeval);
474: push(@Apache::lonxml::namespace,'mathresponse');
475: my $result;
476: @Apache::response::custom_answer=();
477: @Apache::response::custom_answer_type=();
478: &Apache::lonxml::register('Apache::response',('answer'));
479: if ($target eq 'web') {
480: if ( &Apache::response::show_answer() ) {
481: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
482: $safeeval);
483: $Apache::inputtags::answertxt{$id}=[$answer];
484: }
485: } elsif ($target eq 'edit') {
486: $result.=&Apache::edit::tag_start($target,$token);
487: $result.=&Apache::edit::text_arg('String to display for answer:',
488: 'answerdisplay',$token);
489: $result.=&Apache::edit::select_arg('Algebra System:',
490: 'cas',
491: ['maxima'],
492: $token);
493: $result.=&Apache::edit::text_arg('Argument Array:',
494: 'args',$token);
495: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
496: } elsif ($target eq 'modified') {
497: my $constructtag;
498: $constructtag=&Apache::edit::get_new_args($token,$parstack,
499: $safeeval,'answerdisplay','cas','args');
500: if ($constructtag) {
501: $result = &Apache::edit::rebuild_tag($token);
502: $result.=&Apache::edit::handle_insert();
503: }
504: } elsif ($target eq 'answer' || $target eq 'grade') {
505: &Apache::response::reset_params();
506: } elsif ($target eq 'meta') {
507: $result .= &Apache::response::meta_package_write('mathresponse');
508: }
509: return $result;
510: }
511:
512: sub end_mathresponse {
513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
514: my $result;
515: my $part=$Apache::inputtags::part;
516: my $id=$Apache::inputtags::response[-1];
517: if ( $target eq 'grade' && &Apache::response::submitted() ) {
518: my $response = &Apache::response::getresponse();
519: if ( $response =~ /[^\s]/ ) {
520: if (!$Apache::lonxml::default_homework_loaded) {
521: &Apache::lonxml::default_homework_load($safeeval);
522: }
523: my %previous = &Apache::response::check_for_previous($response,
524: $part,$id);
525: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
526: $response;
527: my $error;
528: my $award;
529: my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
530: if ($cas eq 'maxima') {
531: my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
532: $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args);
533: }
534: if (!&Apache::inputtags::valid_award($award)) {
535: $error = $award;
536: $award = 'ERROR';
537: }
538: &Apache::response::handle_previous(\%previous,$award);
539: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
540: $award;
541: if ($error) {
542: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
543: $error;
544: }
545: }
546: }
547: if ($target eq 'web') {
548: &setup_prior_tries_hash(\&format_prior_response_math);
549: }
550:
551: pop(@Apache::lonxml::namespace);
552: pop(@Apache::response::custom_answer);
553: pop(@Apache::response::custom_answer_type);
554: &Apache::lonxml::deregister('Apache::response',('answer'));
555: &Apache::response::end_response();
556: return $result;
557: }
558:
559: sub format_prior_response_math {
560: my ($mode,$answer) =@_;
561: return '<span class="LC_prior_math">'.
562: &HTML::Entities::encode($answer,'"<>&').'</span>';
563: }
564:
565: sub implicit_multiplication {
566: my ($expression)=@_;
567: # Escape scientific notation, so 3e8 does not become 3*e*8
568: # 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
569: $expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
570: # 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
571: $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
572: # Fill in multiplication signs
573: # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
574: $expression=~s/(\w)\s+(\w)/$1\*$2/gs;
575: # )( -> )*(; ) ( -> )*(
576: $expression=~s/\)\s*\(/\)\*\(/gs;
577: # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
578: $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
579: # a ( -> a*(
580: $expression=~s/(\w)\s+\(/$1\*\(/gs;
581: # )a -> )*a; )3 -> )*3; ) 3 -> )*3
582: $expression=~s/\)\s*(\w)/\)\*$1/gs;
583: # 3&8 -> 3e8; 3&-4 -> 3e-4
584: $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
585: return $expression;
586: }
587:
588: sub start_answer {
589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
590: my $result;
591: push(@Apache::response::custom_answer,
592: &Apache::lonxml::get_all_text_unbalanced("/answer",$parser));
593: push(@Apache::response::custom_answer_type,
594: lc(&Apache::lonxml::get_param('type',$parstack,$safeeval)));
595: $Apache::response::custom_answer_type[-1] =~ s/\s+//g;
596: if ($target eq "edit" ) {
597: $result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
598: $result.=&Apache::edit::editfield($token->[1],
599: $Apache::response::custom_answer[-1],
600: '',80,4);
601: } elsif ( $target eq "modified" ) {
602: $result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
603: }
604: return $result;
605: }
606:
607: sub end_answer {
608: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
609: if ($target eq 'edit' ) {
610: return &Apache::edit::end_table();
611: }
612: }
613:
614: sub decide_package {
615: my ($tagstack)=@_;
616: my $package;
617: if ($$tagstack[-1] eq 'parameter') {
618: $package='part';
619: } else {
620: my $i=-1;
621: while (defined($$tagstack[$i])) {
622: if ($$tagstack[$i] =~ /(response|hint)$/) {
623: $package=$$tagstack[$i];
624: last;
625: }
626: $i--;
627: }
628: }
629: return $package;
630: }
631:
632: sub start_responseparam {
633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
634: my $result='';
635: if ($target eq 'meta') {
636: $result = &meta_parameter_write($token->[2]->{'name'},
637: $token->[2]->{'type'},
638: $token->[2]->{'default'},
639: $token->[2]->{'description'});
640: } elsif ($target eq 'edit') {
641: $result.=&Apache::edit::tag_start($target,$token);
642: my $optionlist;
643: my $package=&decide_package($tagstack);
644: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
645: if ($key =~ /^\Q$package\E&(.*)&display$/) {
646: $optionlist.='<option value="'.$1.'">'.
647: $Apache::lonnet::packagetab{$key}.'</option>';
648: }
649: }
650: if (defined($optionlist)) {
651: $result.='Use template: <select name="'.
652: &Apache::edit::html_element_name('parameter_package').'">'.
653: '<option value=""></option>'.$optionlist.'</select><br />';
654: }
655: $result.=&Apache::edit::text_arg('Name:','name',$token).
656: &Apache::edit::text_arg('Type:','type',$token).
657: &Apache::edit::text_arg('Description:','description',$token).
658: &Apache::edit::text_arg('Default:','default',$token).
659: "</td></tr>";
660: $result.=&Apache::edit::end_table;
661: } elsif ($target eq 'modified') {
662: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
663: $safeeval,'name','type',
664: 'description','default');
665: my $element=&Apache::edit::html_element_name('parameter_package');
666: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
667: my $name=$env{"form.$element"};
668: my $tag=&decide_package($tagstack);
669: $token->[2]->{'name'}=$name;
670: $token->[2]->{'type'}=
671: $Apache::lonnet::packagetab{"$tag&$name&type"};
672: $token->[2]->{'description'}=
673: $Apache::lonnet::packagetab{"$tag&$name&display"};
674: $token->[2]->{'default'}=
675: $Apache::lonnet::packagetab{"$tag&$name&default"};
676: $constructtag=1;
677: }
678: if ($constructtag) {
679: $result = &Apache::edit::rebuild_tag($token);
680: $result.=&Apache::edit::handle_insert();
681: }
682: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
683: $target eq 'tex' || $target eq 'analyze' ) {
684: if ($env{'request.state'} eq 'construct') {
685: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
686: my $default=&Apache::lonxml::get_param('default',$parstack,
687: $safeeval);
688: if ($name) {$Apache::inputtags::params{$name}=$default;}
689: }
690: }
691: return $result;
692: }
693:
694: sub end_responseparam {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
696: if ($target eq 'edit') { return ('','no'); }
697: return '';
698: }
699:
700: sub start_parameter {
701: return &start_responseparam(@_);
702: }
703:
704: sub end_parameter {
705: return &end_responseparam(@_);
706: }
707:
708: sub reset_params {
709: %Apache::inputtags::params=();
710: }
711:
712: sub setup_params {
713: my ($tag,$safeeval) = @_;
714:
715: if ($env{'request.state'} eq 'construct') { return; }
716: my %paramlist=();
717: foreach my $key (keys(%Apache::lonnet::packagetab)) {
718: if ($key =~ /^\Q$tag\E/) {
719: my ($package,$name) = split(/&/,$key);
720: $paramlist{$name}=1;
721: }
722: }
723: foreach my $key (keys(%paramlist)) {
724: my $entry= 'resource.'.$Apache::inputtags::part;
725: if (defined($Apache::inputtags::response[-1])) {
726: $entry.='_'.$Apache::inputtags::response[-1];
727: }
728: $entry.='.'.$key;
729: &Apache::lonxml::debug("looking for $entry");
730: my $value = &Apache::lonnet::EXT("$entry");
731: &Apache::lonxml::debug("$key has value :$value:");
732: if ($value eq 'con_lost' || $value =~ /^error:/) {
733: &Apache::lonxml::debug("using nothing");
734: $Apache::inputtags::params{$key}='';
735: } else {
736: my $string="{return qq\0".$value."\0}";
737: my $newvalue=&Apache::run::run($string,$safeeval,1);
738: if (defined($newvalue)) { $value=$newvalue; }
739: $Apache::inputtags::params{$key}=$value;
740: }
741: }
742: }
743:
744: {
745: my @answer_bits;
746: my $need_row_start;
747:
748: sub answer_header {
749: my ($type,$increment,$rows) = @_;
750: my $result;
751: if ($env{'form.answer_output_mode'} eq 'tex') {
752: undef(@answer_bits);
753: my $bit;
754: if ($Apache::lonhomework::type eq 'exam') {
755: $bit = ($Apache::lonxml::counter+$increment).') ';
756: } else {
757: $bit .= ' Answer for Part: \verb|'.
758: $Apache::inputtags::part.'| ';
759: }
760: push(@answer_bits,$bit);
761: } else {
762: my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
763: $result = '<table border="1"><tr>';
764: if ($Apache::lonhomework::type eq 'exam') {
765: $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
766: } else {
767: $result .= $td.&mt('Answer for Part: [_1]',
768: $Apache::inputtags::part).'</td>';
769: }
770: $result .= "\n";
771: $need_row_start = 0;
772: }
773: return $result;
774: }
775:
776: sub next_answer {
777: my ($type) = @_;
778: my $result;
779: if ($env{'form.answer_output_mode'} eq 'tex') {
780: # FIXME ... need to do something with tex mode
781: } else {
782: $result .= "</tr>";
783: $need_row_start = 1;
784: }
785: return $result;
786: }
787:
788: sub answer_part {
789: my ($type,$answer,$args) = @_;
790: my $result;
791: if ($env{'form.answer_output_mode'} eq 'tex') {
792: if (!$args->{'no_verbatim'}) {
793: my $to_use='|';
794: foreach my $value (32..126) {
795: my $char=pack('c',$value);
796: if ($answer !~ /\Q$char\E/) {
797: $to_use=$char;
798: last;
799: }
800: }
801: if ($answer ne '') {
802: $answer = '\verb'.$to_use.$answer.$to_use;
803: }
804: }
805: if ($answer ne '') {
806: push(@answer_bits,$answer);
807: }
808: } else {
809: if ($need_row_start) {
810: $result .= '<tr>';
811: $need_row_start = 0;
812: }
813: $result .= '<td>'.$answer.'</td>';
814: }
815: return $result;
816: }
817:
818: sub answer_footer {
819: my ($type) = @_;
820: my $result;
821: if ($env{'form.answer_output_mode'} eq 'tex') {
822: my $columns = scalar(@answer_bits);
823: $result = ' \vskip 0 mm \noindent \begin{tabular}{|'.'c|'x$columns.'}\hline ';
824: $result .= join(' & ',@answer_bits);
825: $result .= ' \\\\ \\hline \end{tabular} \vskip 0 mm ';
826: } else {
827: $result = '</tr></table>';
828: }
829: return $result;
830: }
831:
832: }
833:
834: sub showallfoils {
835: if (defined($env{'form.showallfoils'})) {
836: my ($symb)=&Apache::lonnet::whichuser();
837: if (($env{'request.state'} eq 'construct') ||
838: ($env{'user.adv'} && $symb eq '') ||
839: ($Apache::lonhomework::viewgrades) ) {
840: return 1;
841: }
842: }
843: if ($Apache::lonhomework::type eq 'survey') { return 1; }
844: return 0;
845: }
846:
847: sub getresponse {
848: my ($temp,$resulttype)=@_;
849: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
850: my $response;
851: if (!defined($temp)) {
852: $temp=1;
853: } else {
854: $formparm.=":$temp";
855: }
856: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
857: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
858: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
859: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
860: if ($env{'form.submitted'} eq 'scantron') {
861: my $part = $Apache::inputtags::part;
862: my $id = $Apache::inputtags::response[-1];
863: $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
864: '.answer'};
865: # save bubbled letter for later
866: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
867: $response;
868: if ($resulttype ne 'letter') {
869: if ($resulttype eq 'A is 1') {
870: $response = $let_to_num{$response}+1;
871: } else {
872: $response = $let_to_num{$response};
873: }
874: }
875: } else {
876: $response = $env{$formparm};
877: }
878: return $response;
879: }
880:
881: sub repetition {
882: my $id = $Apache::inputtags::part;
883: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
884: if (!defined($weight) || ($weight eq '')) { $weight=1; }
885: my $repetition = int($weight/10);
886: if ($weight % 10 != 0) { $repetition++; }
887: return $repetition;
888: }
889:
890: sub scored_response {
891: my ($part,$id)=@_;
892: my $repetition=&repetition();
893: my $score=0;
894: for (my $i=0;$i<$repetition;$i++) {
895: # A is 1, B is 2, etc. (get response return 0-9 and then we add 1)
896: my $increase=&Apache::response::getresponse($i+1);
897: if ($increase ne '') { $score+=$increase+1; }
898: }
899: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
900: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
901: my $pcr=$score/$weight;
902: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
903: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
904: 'ASSIGNED_SCORE';
905: return $repetition;
906: }
907:
908: sub whichorder {
909: my ($max,$randomize,$showall,$hash)=@_;
910: #&Apache::lonxml::debug("man $max randomize $randomize");
911: if (!defined(@{ $$hash{'names'} })) { return; }
912: my @names = @{ $$hash{'names'} };
913: my @whichopt =();
914: my (%top,@toplist,%bottom,@bottomlist);
915: if (!($showall || ($randomize eq 'no'))) {
916: my $current=0;
917: foreach my $name (@names) {
918: $current++;
919: if ($$hash{"$name.location"} eq 'top') {
920: $top{$name}=$current;
921: } elsif ($$hash{"$name.location"} eq 'bottom') {
922: $bottom{$name}=$current;
923: }
924: }
925: }
926: my $topcount=0;
927: my $bottomcount=0;
928: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
929: && ($#names > -1)) {
930: #&Apache::lonxml::debug("Have $#whichopt max is $max");
931: my $aopt;
932: if ($showall || ($randomize eq 'no')) {
933: $aopt=0;
934: } else {
935: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
936: }
937: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
938: $aopt=splice(@names,$aopt,1);
939: #&Apache::lonxml::debug("Picked $aopt");
940: if ($top{$aopt}) {
941: $toplist[$top{$aopt}]=$aopt;
942: $topcount++;
943: } elsif ($bottom{$aopt}) {
944: $bottomlist[$bottom{$aopt}]=$aopt;
945: $bottomcount++;
946: } else {
947: push (@whichopt,$aopt);
948: }
949: }
950: for (my $i=0;$i<=$#toplist;$i++) {
951: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
952: }
953: for (my $i=0;$i<=$#bottomlist;$i++) {
954: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
955: }
956: return @whichopt;
957: }
958:
959: sub show_answer {
960: my $part = $Apache::inputtags::part;
961: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
962: my $status = $Apache::inputtags::status[-1];
963: return ( ($award =~ /^correct/
964: && lc($Apache::lonhomework::problemstatus) ne 'no')
965: || $status eq "SHOW_ANSWER");
966: }
967:
968: sub analyze_store_foilgroup {
969: my ($shown,$attrs)=@_;
970: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
971: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
972: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
973: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
974: foreach my $attr (@$attrs) {
975: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
976: $Apache::response::foilgroup{"$name.".$attr};
977: }
978: }
979: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
980: }
981:
982: sub check_if_computed {
983: my ($token,$parstack,$safeeval,$name)=@_;
984: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
985: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
986: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
987: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
988: }
989: }
990:
991: sub pick_foil_for_concept {
992: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
993: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
994: my @names = @{ $Apache::response::conceptgroup{'names'} };
995: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
996: my $name=$names[$pick];
997: push @{ $Apache::response::foilgroup{'names'} }, $name;
998: foreach my $attr (@$attrs) {
999: $Apache::response::foilgroup{"$name.".$attr} =
1000: $Apache::response::conceptgroup{"$name.".$attr};
1001: }
1002: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
1003: $Apache::response::foilgroup{"$name.concept"} = $concept;
1004: &Apache::lonxml::debug("Selecting $name in $concept");
1005: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
1006: if ($target eq 'analyze') {
1007: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
1008: $concept);
1009: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
1010: $Apache::response::conceptgroup{'names'};
1011: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
1012: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
1013: $name);
1014: foreach my $attr (@$attrs) {
1015: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
1016: $Apache::response::conceptgroup{"$name.$attr"};
1017: }
1018: }
1019: }
1020: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
1021: $hinthash->{"$part_id.concept.$concept"}=
1022: $Apache::response::conceptgroup{'names'};
1023:
1024: }
1025:
1026: sub get_response_param {
1027: my ($id,$name,$default)=@_;
1028: my $parameter;
1029: if ($env{'request.state'} eq 'construct' &&
1030: defined($Apache::inputtags::params{$name})) {
1031: $parameter=$Apache::inputtags::params{$name};
1032: } else {
1033: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
1034: }
1035: if (!defined($parameter) || $parameter eq '') {
1036: $parameter = $default;
1037: }
1038: return $parameter;
1039: }
1040:
1041: sub submitted {
1042: my ($who)=@_;
1043:
1044: # when scatron grading any submission is a submission
1045: if ($env{'form.submitted'} eq 'scantron') { return 1; }
1046: # if the caller only cared if this was a scantron submission
1047: if ($who eq 'scantron') { return 0; }
1048: # if the Submit Answer button for this particular part was pressed
1049: my $partid=$Apache::inputtags::part;
1050: if ($env{'form.submitted'} eq "part_$partid") {
1051: return 1;
1052: }
1053: if ($env{'form.submitted'} eq "yes"
1054: && defined($env{'form.submit_'.$partid})) {
1055: return 1;
1056: }
1057: # Submit All button on a .page was pressed
1058: if (defined($env{'form.all_submit'})) { return 1; }
1059: # otherwise no submission occured
1060: return 0;
1061: }
1062:
1063: sub add_to_gradingqueue {
1064: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1065: if ( $courseid eq ''
1066: || $symb eq ''
1067: || $env{'request.state'} eq 'construct'
1068: || $Apache::lonhomework::type ne 'problem') {
1069: return;
1070: }
1071:
1072: my %queue_info = ( 'type' => 'problem',
1073: 'time' => time);
1074:
1075: if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
1076: $queue_info{'slot'}=
1077: $Apache::lonhomework::history{"resource.0.checkedin.slot"};
1078: }
1079:
1080: my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
1081: if ($result ne 'ok') {
1082: &Apache::lonxml::error("add_to_queue said $result");
1083: }
1084: }
1085:
1086: # basically undef and 0 (both false) mean that they still have work to do
1087: # and all true values mean that they can't do any more work
1088: #
1089: # a return of undef means it is unattempted
1090: # a return of 0 means it is attmpted and wrong but still has tries
1091: # a return of 1 means it is marked correct
1092: # a return of 2 means they have exceed maximum number of tries
1093: # a return of 3 means it after the answer date
1094: sub check_status {
1095: my ($id)=@_;
1096: if (!defined($id)) { $id=$Apache::inputtags::part; }
1097: my $curtime=&Apache::lonnet::EXT('system.time');
1098: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
1099: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
1100: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
1101: if ( $opendate && $curtime > $opendate &&
1102: $duedate && $curtime > $duedate &&
1103: $answerdate && $curtime > $answerdate) {
1104: return 3;
1105: }
1106: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
1107: if ($status =~ /^correct/) { return 1; }
1108: if (!$status) { return undef; }
1109: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
1110: if ($maxtries eq '') { $maxtries=2; }
1111: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
1112: if ($curtries < $maxtries) { return 0; }
1113: return 2;
1114: }
1115:
1116: sub setup_prior_tries_hash {
1117: my ($func,$data) = @_;
1118: my $part = $Apache::inputtags::part;
1119: my $id = $Apache::inputtags::response[-1];
1120: foreach my $i (1..$Apache::lonhomework::history{'version'}) {
1121: my $sub_key = "$i:resource.$part.$id.submission";
1122: next if (!exists($Apache::lonhomework::history{$sub_key}));
1123: my @other_data;
1124: foreach my $datum (@{ $data }) {
1125: if (ref($datum)) {
1126: push(@other_data,$datum);
1127: } else {
1128: my $info_key = "$i:resource.$part.$id.$datum";
1129: push(@other_data,$Apache::lonhomework::history{$info_key});
1130: }
1131: }
1132:
1133: my $output =
1134: &$func('grade',
1135: $Apache::lonhomework::history{$sub_key},
1136: \@other_data);
1137: if (defined($output)) {
1138: $Apache::inputtags::submission_display{$sub_key} = $output;
1139: }
1140: }
1141: }
1142:
1143: 1;
1144: __END__
1145:
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