1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.158 2006/12/18 21:37:47 www 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) = @_;
269: my %previous;
270: $previous{'used'} = 0;
271: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
272: if ($key =~ /resource\.$partid\.$id\.submission$/) {
273: &Apache::lonxml::debug("Trying $key");
274: my $pastresponse=$Apache::lonhomework::history{$key};
275: if ($pastresponse eq $curresponse) {
276: $previous{'used'} = 1;
277: my $history;
278: if ( $key =~ /^(\d+):/ ) {
279: $history=$1;
280: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
281: $previous{'last'}='0';
282: push(@{ $previous{'version'} },$history);
283: } else {
284: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
285: $previous{'last'}='1';
286: }
287: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
288: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
289: }
290: }
291: }
292: &Apache::lonhomework::showhash(%previous);
293: return %previous;
294: }
295:
296: sub handle_previous {
297: my ($previous,$ad)=@_;
298: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
299: if ($$previous{'last'}) {
300: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
301: push(@Apache::inputtags::previous_version,$$previous{'version'});
302: } elsif ($Apache::lonhomework::type ne 'survey') {
303: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
304: push(@Apache::inputtags::previous_version,$$previous{'version'});
305: }
306: }
307: }
308:
309: sub view_or_modify {
310: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
311: my $myself=0;
312: if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
313: $myself=1;
314: }
315: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
316: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
317: if ($mgr) { return "M"; }
318: if ($vgr) { return "V"; }
319: if ($myself) { return "V"; }
320: return '';
321: }
322:
323: sub start_dataresponse {
324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
325: my $id = &Apache::response::start_response($parstack,$safeeval);
326: my $result;
327: if ($target eq 'web') {
328: $result = $token->[2]->{'display'}.':';
329: } elsif ($target eq 'meta') {
330: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
331: $token->[2]->{'type'},
332: $token->[2]->{'display'});
333: $result .= &Apache::response::meta_package_write('dataresponse');
334: }
335: return $result;
336: }
337:
338: sub end_dataresponse {
339: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
340: my $result;
341: if ( $target eq 'web' ) {
342: } elsif ($target eq 'grade' ) {
343: if ( defined $env{'form.submitted'}) {
344: my ($symb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
345: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
346: if ($allowed) {
347: &Apache::response::setup_params('dataresponse',$safeeval);
348: my $partid = $Apache::inputtags::part;
349: my $id = $Apache::inputtags::response['-1'];
350: my $response = $env{'form.HWVAL_'.$id};
351: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
352: if ( $response =~ /[^\s]/) {
353: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
354: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
355: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
356: }
357: } else {
358: $result='Not Permitted to change values.'
359: }
360: }
361: }
362: &Apache::response::end_response;
363: return $result;
364: }
365:
366: sub start_customresponse {
367: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
368: my $id = &Apache::response::start_response($parstack,$safeeval);
369: push(@Apache::lonxml::namespace,'customresponse');
370: my $result;
371: @Apache::response::custom_answer=();
372: @Apache::response::custom_answer_type=();
373: &Apache::lonxml::register('Apache::response',('answer'));
374: if ($target eq 'web') {
375: if ( &Apache::response::show_answer() ) {
376: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
377: $safeeval);
378: $Apache::inputtags::answertxt{$id}=[$answer];
379: }
380: } elsif ($target eq 'edit') {
381: $result.=&Apache::edit::tag_start($target,$token);
382: $result.=&Apache::edit::text_arg('String to display for answer:',
383: 'answerdisplay',$token);
384: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
385: } elsif ($target eq 'modified') {
386: my $constructtag;
387: $constructtag=&Apache::edit::get_new_args($token,$parstack,
388: $safeeval,'answerdisplay');
389: if ($constructtag) {
390: $result = &Apache::edit::rebuild_tag($token);
391: $result.=&Apache::edit::handle_insert();
392: }
393: } elsif ($target eq 'answer' || $target eq 'grade') {
394: &Apache::response::reset_params();
395: } elsif ($target eq 'meta') {
396: $result .= &Apache::response::meta_package_write('customresponse');
397: }
398: return $result;
399: }
400:
401: sub end_customresponse {
402: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
403: my $result;
404: my $part=$Apache::inputtags::part;
405: my $id=$Apache::inputtags::response[-1];
406: if ( $target eq 'grade' && &Apache::response::submitted() ) {
407: my $response = &Apache::response::getresponse();
408: if ($Apache::lonhomework::type eq 'exam' ||
409: &Apache::response::submitted('scantron')) {
410: &Apache::response::scored_response($part,$id);
411: } elsif ( $response =~ /[^\s]/ &&
412: $Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
413: if (!$Apache::lonxml::default_homework_loaded) {
414: &Apache::lonxml::default_homework_load($safeeval);
415: }
416: my %previous = &Apache::response::check_for_previous($response,
417: $part,$id);
418: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
419: $response;
420: my $error;
421: ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
422: $response;
423:
424: my $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
425: if (!&Apache::inputtags::valid_award($award)) {
426: $error = $award;
427: $award = 'ERROR';
428: }
429: &Apache::response::handle_previous(\%previous,$award);
430: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
431: $award;
432: if ($error) {
433: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
434: $error;
435: }
436: }
437: } elsif ( $target eq 'answer') {
438: $result = &Apache::response::answer_header('customresponse');
439: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
440: $safeeval);
441: if ($env{'form.answer_output_mode'} ne 'tex') {
442: $answer = '<b>'.$answer.'</b>';
443: }
444: $result .= &Apache::response::answer_part('customresponse',$answer);
445: $result .= &Apache::response::answer_footer('customresponse');
446: }
447: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
448: $target eq 'tex' || $target eq 'analyze') {
449: &Apache::lonxml::increment_counter(&Apache::response::repetition());
450: }
451: pop(@Apache::lonxml::namespace);
452: pop(@Apache::response::custom_answer);
453: pop(@Apache::response::custom_answer_type);
454: &Apache::lonxml::deregister('Apache::response',('answer'));
455: &Apache::response::end_response();
456: return $result;
457: }
458:
459:
460: sub start_mathresponse {
461: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
462: my $id = &Apache::response::start_response($parstack,$safeeval);
463: push(@Apache::lonxml::namespace,'mathresponse');
464: my $result;
465: @Apache::response::custom_answer=();
466: @Apache::response::custom_answer_type=();
467: &Apache::lonxml::register('Apache::response',('answer'));
468: if ($target eq 'web') {
469: if ( &Apache::response::show_answer() ) {
470: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
471: $safeeval);
472: $Apache::inputtags::answertxt{$id}=[$answer];
473: }
474: } elsif ($target eq 'edit') {
475: $result.=&Apache::edit::tag_start($target,$token);
476: $result.=&Apache::edit::text_arg('String to display for answer:',
477: 'answerdisplay',$token);
478: $result.=&Apache::edit::select_arg('Algebra System:',
479: 'cas',
480: ['maxima'],
481: $token);
482: $result.=&Apache::edit::text_arg('Argument Array:',
483: 'args',$token);
484: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
485: } elsif ($target eq 'modified') {
486: my $constructtag;
487: $constructtag=&Apache::edit::get_new_args($token,$parstack,
488: $safeeval,'answerdisplay','cas','args');
489: if ($constructtag) {
490: $result = &Apache::edit::rebuild_tag($token);
491: $result.=&Apache::edit::handle_insert();
492: }
493: } elsif ($target eq 'answer' || $target eq 'grade') {
494: &Apache::response::reset_params();
495: } elsif ($target eq 'meta') {
496: $result .= &Apache::response::meta_package_write('mathresponse');
497: }
498: return $result;
499: }
500:
501: sub end_mathresponse {
502: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
503: my $result;
504: my $part=$Apache::inputtags::part;
505: my $id=$Apache::inputtags::response[-1];
506: if ( $target eq 'grade' && &Apache::response::submitted() ) {
507: my $response = &Apache::response::getresponse();
508: if ( $response =~ /[^\s]/ ) {
509: if (!$Apache::lonxml::default_homework_loaded) {
510: &Apache::lonxml::default_homework_load($safeeval);
511: }
512: my %previous = &Apache::response::check_for_previous($response,
513: $part,$id);
514: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
515: $response;
516: my $error;
517: my $award;
518: my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
519: if ($cas eq 'maxima') {
520: my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
521: $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args);
522: }
523: if (!&Apache::inputtags::valid_award($award)) {
524: $error = $award;
525: $award = 'ERROR';
526: }
527: &Apache::response::handle_previous(\%previous,$award);
528: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
529: $award;
530: if ($error) {
531: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
532: $error;
533: }
534: }
535: }
536: pop(@Apache::lonxml::namespace);
537: pop(@Apache::response::custom_answer);
538: pop(@Apache::response::custom_answer_type);
539: &Apache::lonxml::deregister('Apache::response',('answer'));
540: &Apache::response::end_response();
541: return $result;
542: }
543:
544: sub implicit_multiplication {
545: my ($expression)=@_;
546: # Escape scientific notation, so 3e8 does not become 3*e*8
547: # 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
548: $expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
549: # 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
550: $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
551: # Fill in multiplication signs
552: # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
553: $expression=~s/(\w)\s+(\w)/$1\*$2/gs;
554: # )( -> )*(; ) ( -> )*(
555: $expression=~s/\)\s*\(/\)\*\(/gs;
556: # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
557: $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
558: # a ( -> a*(
559: $expression=~s/(\w)\s+\(/$1\*\(/gs;
560: # )a -> )*a; )3 -> )*3; ) 3 -> )*3
561: $expression=~s/\)\s*(\w)/\)\*$1/gs;
562: # 3&8 -> 3e8; 3&-4 -> 3e-4
563: $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
564: return $expression;
565: }
566:
567: sub start_answer {
568: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
569: my $result;
570: push(@Apache::response::custom_answer,
571: &Apache::lonxml::get_all_text_unbalanced("/answer",$parser));
572: push(@Apache::response::custom_answer_type,
573: lc(&Apache::lonxml::get_param('type',$parstack,$safeeval)));
574: $Apache::response::custom_answer_type[-1] =~ s/\s+//g;
575: if ($target eq "edit" ) {
576: $result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
577: $result.=&Apache::edit::editfield($token->[1],
578: $Apache::response::custom_answer[-1],
579: '',80,4);
580: } elsif ( $target eq "modified" ) {
581: $result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
582: }
583: return $result;
584: }
585:
586: sub end_answer {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
588: if ($target eq 'edit' ) {
589: return &Apache::edit::end_table();
590: }
591: }
592:
593: sub decide_package {
594: my ($tagstack)=@_;
595: my $package;
596: if ($$tagstack[-1] eq 'parameter') {
597: $package='part';
598: } else {
599: my $i=-1;
600: while (defined($$tagstack[$i])) {
601: if ($$tagstack[$i] =~ /(response|hint)$/) {
602: $package=$$tagstack[$i];
603: last;
604: }
605: $i--;
606: }
607: }
608: return $package;
609: }
610:
611: sub start_responseparam {
612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
613: my $result='';
614: if ($target eq 'meta') {
615: $result = &meta_parameter_write($token->[2]->{'name'},
616: $token->[2]->{'type'},
617: $token->[2]->{'default'},
618: $token->[2]->{'description'});
619: } elsif ($target eq 'edit') {
620: $result.=&Apache::edit::tag_start($target,$token);
621: my $optionlist;
622: my $package=&decide_package($tagstack);
623: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
624: if ($key =~ /^\Q$package\E&(.*)&display$/) {
625: $optionlist.='<option value="'.$1.'">'.
626: $Apache::lonnet::packagetab{$key}.'</option>';
627: }
628: }
629: if (defined($optionlist)) {
630: $result.='Use template: <select name="'.
631: &Apache::edit::html_element_name('parameter_package').'">'.
632: '<option value=""></option>'.$optionlist.'</select><br />';
633: }
634: $result.=&Apache::edit::text_arg('Name:','name',$token).
635: &Apache::edit::text_arg('Type:','type',$token).
636: &Apache::edit::text_arg('Description:','description',$token).
637: &Apache::edit::text_arg('Default:','default',$token).
638: "</td></tr>";
639: $result.=&Apache::edit::end_table;
640: } elsif ($target eq 'modified') {
641: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
642: $safeeval,'name','type',
643: 'description','default');
644: my $element=&Apache::edit::html_element_name('parameter_package');
645: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
646: my $name=$env{"form.$element"};
647: my $tag=&decide_package($tagstack);
648: $token->[2]->{'name'}=$name;
649: $token->[2]->{'type'}=
650: $Apache::lonnet::packagetab{"$tag&$name&type"};
651: $token->[2]->{'description'}=
652: $Apache::lonnet::packagetab{"$tag&$name&display"};
653: $token->[2]->{'default'}=
654: $Apache::lonnet::packagetab{"$tag&$name&default"};
655: $constructtag=1;
656: }
657: if ($constructtag) {
658: $result = &Apache::edit::rebuild_tag($token);
659: $result.=&Apache::edit::handle_insert();
660: }
661: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
662: $target eq 'tex' || $target eq 'analyze' ) {
663: if ($env{'request.state'} eq 'construct') {
664: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
665: my $default=&Apache::lonxml::get_param('default',$parstack,
666: $safeeval);
667: if ($name) {$Apache::inputtags::params{$name}=$default;}
668: }
669: }
670: return $result;
671: }
672:
673: sub end_responseparam {
674: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
675: if ($target eq 'edit') { return ('','no'); }
676: return '';
677: }
678:
679: sub start_parameter {
680: return &start_responseparam(@_);
681: }
682:
683: sub end_parameter {
684: return &end_responseparam(@_);
685: }
686:
687: sub reset_params {
688: %Apache::inputtags::params=();
689: }
690:
691: sub setup_params {
692: my ($tag,$safeeval) = @_;
693:
694: if ($env{'request.state'} eq 'construct') { return; }
695: my %paramlist=();
696: foreach my $key (keys(%Apache::lonnet::packagetab)) {
697: if ($key =~ /^$tag/) {
698: my ($package,$name) = split(/&/,$key);
699: $paramlist{$name}=1;
700: }
701: }
702: foreach my $key (keys(%paramlist)) {
703: my $entry= 'resource.'.$Apache::inputtags::part;
704: if (defined($Apache::inputtags::response[-1])) {
705: $entry.='_'.$Apache::inputtags::response[-1];
706: }
707: $entry.='.'.$key;
708: &Apache::lonxml::debug("looking for $entry");
709: my $value = &Apache::lonnet::EXT("$entry");
710: &Apache::lonxml::debug("$key has value :$value:");
711: if ($value eq 'con_lost' || $value =~ /^error:/) {
712: &Apache::lonxml::debug("using nothing");
713: $Apache::inputtags::params{$key}='';
714: } else {
715: my $string="{return qq\0".$value."\0}";
716: my $newvalue=&Apache::run::run($string,$safeeval,1);
717: if (defined($newvalue)) { $value=$newvalue; }
718: $Apache::inputtags::params{$key}=$value;
719: }
720: }
721: }
722:
723: {
724: my @answer_bits;
725: my $need_row_start;
726:
727: sub answer_header {
728: my ($type,$increment,$rows) = @_;
729: my $result;
730: if ($env{'form.answer_output_mode'} eq 'tex') {
731: undef(@answer_bits);
732: my $bit;
733: if ($Apache::lonhomework::type eq 'exam') {
734: $bit = ($Apache::lonxml::counter+$increment).') ';
735: } else {
736: $bit .= ' Answer for Part: \verb|'.
737: $Apache::inputtags::part.'| ';
738: }
739: push(@answer_bits,$bit);
740: } else {
741: my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
742: $result = '<table border="1"><tr>';
743: if ($Apache::lonhomework::type eq 'exam') {
744: $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
745: } else {
746: $result .= $td.&mt('Answer for Part: [_1]',
747: $Apache::inputtags::part).'</td>';
748: }
749: $result .= "\n";
750: $need_row_start = 0;
751: }
752: return $result;
753: }
754:
755: sub next_answer {
756: my ($type) = @_;
757: my $result;
758: if ($env{'form.answer_output_mode'} eq 'tex') {
759: # FIXME ... need to do something with tex mode
760: } else {
761: $result .= "</tr>";
762: $need_row_start = 1;
763: }
764: return $result;
765: }
766:
767: sub answer_part {
768: my ($type,$answer,$args) = @_;
769: my $result;
770: if ($env{'form.answer_output_mode'} eq 'tex') {
771: if (!$args->{'no_verbatim'}) {
772: my $to_use='|';
773: foreach my $value (32..126) {
774: my $char=pack('c',$value);
775: if ($answer !~ /\Q$char\E/) {
776: $to_use=$char;
777: last;
778: }
779: }
780: if ($answer ne '') {
781: $answer = '\verb'.$to_use.$answer.$to_use;
782: }
783: }
784: if ($answer ne '') {
785: push(@answer_bits,$answer);
786: }
787: } else {
788: if ($need_row_start) {
789: $result .= '<tr>';
790: $need_row_start = 0;
791: }
792: $result .= '<td>'.$answer.'</td>';
793: }
794: return $result;
795: }
796:
797: sub answer_footer {
798: my ($type) = @_;
799: my $result;
800: if ($env{'form.answer_output_mode'} eq 'tex') {
801: my $columns = scalar(@answer_bits);
802: $result = ' \vskip 0 mm \noindent \begin{tabular}{|'.'c|'x$columns.'}\hline ';
803: $result .= join(' & ',@answer_bits);
804: $result .= ' \\\\ \\hline \end{tabular} \vskip 0 mm ';
805: } else {
806: $result = '</tr></table>';
807: }
808: return $result;
809: }
810:
811: }
812:
813: sub showallfoils {
814: if (defined($env{'form.showallfoils'})) {
815: my ($symb)=&Apache::lonnet::whichuser();
816: if (($env{'request.state'} eq 'construct') ||
817: ($env{'user.adv'} && $symb eq '') ||
818: ($Apache::lonhomework::viewgrades) ) {
819: return 1;
820: }
821: }
822: if ($Apache::lonhomework::type eq 'survey') { return 1; }
823: return 0;
824: }
825:
826: sub getresponse {
827: my ($temp,$resulttype)=@_;
828: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
829: my $response;
830: if (!defined($temp)) {
831: $temp=1;
832: } else {
833: $formparm.=":$temp";
834: }
835: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
836: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
837: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
838: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
839: if ($env{'form.submitted'} eq 'scantron') {
840: my $part = $Apache::inputtags::part;
841: my $id = $Apache::inputtags::response[-1];
842: $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
843: '.answer'};
844: # save bubbled letter for later
845: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
846: $response;
847: if ($resulttype ne 'letter') {
848: if ($resulttype eq 'A is 1') {
849: $response = $let_to_num{$response}+1;
850: } else {
851: $response = $let_to_num{$response};
852: }
853: }
854: } else {
855: $response = $env{$formparm};
856: }
857: return $response;
858: }
859:
860: sub repetition {
861: my $id = $Apache::inputtags::part;
862: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
863: if (!defined($weight) || ($weight eq '')) { $weight=1; }
864: my $repetition = int($weight/10);
865: if ($weight % 10 != 0) { $repetition++; }
866: return $repetition;
867: }
868:
869: sub scored_response {
870: my ($part,$id)=@_;
871: my $repetition=&repetition();
872: my $score=0;
873: for (my $i=0;$i<$repetition;$i++) {
874: # A is 1, B is 2, etc. (get response return 0-9 and then we add 1)
875: my $increase=&Apache::response::getresponse($i+1);
876: if ($increase ne '') { $score+=$increase+1; }
877: }
878: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
879: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
880: my $pcr=$score/$weight;
881: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
882: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
883: 'ASSIGNED_SCORE';
884: return $repetition;
885: }
886:
887: sub whichorder {
888: my ($max,$randomize,$showall,$hash)=@_;
889: #&Apache::lonxml::debug("man $max randomize $randomize");
890: if (!defined(@{ $$hash{'names'} })) { return; }
891: my @names = @{ $$hash{'names'} };
892: my @whichopt =();
893: my (%top,@toplist,%bottom,@bottomlist);
894: if (!($showall || ($randomize eq 'no'))) {
895: my $current=0;
896: foreach my $name (@names) {
897: $current++;
898: if ($$hash{"$name.location"} eq 'top') {
899: $top{$name}=$current;
900: } elsif ($$hash{"$name.location"} eq 'bottom') {
901: $bottom{$name}=$current;
902: }
903: }
904: }
905: my $topcount=0;
906: my $bottomcount=0;
907: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
908: && ($#names > -1)) {
909: #&Apache::lonxml::debug("Have $#whichopt max is $max");
910: my $aopt;
911: if ($showall || ($randomize eq 'no')) {
912: $aopt=0;
913: } else {
914: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
915: }
916: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
917: $aopt=splice(@names,$aopt,1);
918: #&Apache::lonxml::debug("Picked $aopt");
919: if ($top{$aopt}) {
920: $toplist[$top{$aopt}]=$aopt;
921: $topcount++;
922: } elsif ($bottom{$aopt}) {
923: $bottomlist[$bottom{$aopt}]=$aopt;
924: $bottomcount++;
925: } else {
926: push (@whichopt,$aopt);
927: }
928: }
929: for (my $i=0;$i<=$#toplist;$i++) {
930: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
931: }
932: for (my $i=0;$i<=$#bottomlist;$i++) {
933: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
934: }
935: return @whichopt;
936: }
937:
938: sub show_answer {
939: my $part = $Apache::inputtags::part;
940: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
941: my $status = $Apache::inputtags::status[-1];
942: return ( ($award =~ /^correct/
943: && lc($Apache::lonhomework::problemstatus) ne 'no')
944: || $status eq "SHOW_ANSWER");
945: }
946:
947: sub analyze_store_foilgroup {
948: my ($shown,$attrs)=@_;
949: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
950: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
951: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
952: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
953: foreach my $attr (@$attrs) {
954: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
955: $Apache::response::foilgroup{"$name.".$attr};
956: }
957: }
958: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
959: }
960:
961: sub check_if_computed {
962: my ($token,$parstack,$safeeval,$name)=@_;
963: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
964: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
965: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
966: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
967: }
968: }
969:
970: sub pick_foil_for_concept {
971: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
972: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
973: my @names = @{ $Apache::response::conceptgroup{'names'} };
974: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
975: my $name=$names[$pick];
976: push @{ $Apache::response::foilgroup{'names'} }, $name;
977: foreach my $attr (@$attrs) {
978: $Apache::response::foilgroup{"$name.".$attr} =
979: $Apache::response::conceptgroup{"$name.".$attr};
980: }
981: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
982: $Apache::response::foilgroup{"$name.concept"} = $concept;
983: &Apache::lonxml::debug("Selecting $name in $concept");
984: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
985: if ($target eq 'analyze') {
986: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
987: $concept);
988: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
989: $Apache::response::conceptgroup{'names'};
990: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
991: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
992: $name);
993: foreach my $attr (@$attrs) {
994: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
995: $Apache::response::conceptgroup{"$name.$attr"};
996: }
997: }
998: }
999: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
1000: $hinthash->{"$part_id.concept.$concept"}=
1001: $Apache::response::conceptgroup{'names'};
1002:
1003: }
1004:
1005: sub get_response_param {
1006: my ($id,$name,$default)=@_;
1007: my $parameter;
1008: if ($env{'request.state'} eq 'construct' &&
1009: defined($Apache::inputtags::params{$name})) {
1010: $parameter=$Apache::inputtags::params{$name};
1011: } else {
1012: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
1013: }
1014: if (!defined($parameter) || $parameter eq '') {
1015: $parameter = $default;
1016: }
1017: return $parameter;
1018: }
1019:
1020: sub submitted {
1021: my ($who)=@_;
1022:
1023: # when scatron grading any submission is a submission
1024: if ($env{'form.submitted'} eq 'scantron') { return 1; }
1025: # if the caller only cared if this was a scantron submission
1026: if ($who eq 'scantron') { return 0; }
1027: # if the Submit Answer button for this particular part was pressed
1028: my $partid=$Apache::inputtags::part;
1029: if (defined($env{'form.submit_'.$partid})) { return 1; }
1030: # Submit All button on a .page was pressed
1031: if (defined($env{'form.all_submit'})) { return 1; }
1032: # otherwise no submission occured
1033: return 0;
1034: }
1035:
1036: sub add_to_gradingqueue {
1037: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1038: if ( $courseid eq ''
1039: || $symb eq ''
1040: || $env{'request.state'} eq 'construct'
1041: || $Apache::lonhomework::type ne 'problem') {
1042: return;
1043: }
1044:
1045: my %queue_info = ( 'type' => 'problem',
1046: 'time' => time);
1047:
1048: if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
1049: $queue_info{'slot'}=
1050: $Apache::lonhomework::history{"resource.0.checkedin.slot"};
1051: }
1052:
1053: my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
1054: if ($result ne 'ok') {
1055: &Apache::lonxml::error("add_to_queue said $result");
1056: }
1057: }
1058:
1059: # basically undef and 0 (both false) mean that they still have work to do
1060: # and all true values mean that they can't do any more work
1061: #
1062: # a return of undef means it is unattempted
1063: # a return of 0 means it is attmpted and wrong but still has tries
1064: # a return of 1 means it is marked correct
1065: # a return of 2 means they have exceed maximum number of tries
1066: # a return of 3 means it after the answer date
1067: sub check_status {
1068: my ($id)=@_;
1069: if (!defined($id)) { $id=$Apache::inputtags::part; }
1070: my $curtime=&Apache::lonnet::EXT('system.time');
1071: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
1072: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
1073: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
1074: if ( $opendate && $curtime > $opendate &&
1075: $duedate && $curtime > $duedate &&
1076: $answerdate && $curtime > $answerdate) {
1077: return 3;
1078: }
1079: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
1080: if ($status =~ /^correct/) { return 1; }
1081: if (!$status) { return undef; }
1082: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
1083: if ($maxtries eq '') { $maxtries=2; }
1084: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
1085: if ($curtries < $maxtries) { return 0; }
1086: return 2;
1087: }
1088:
1089: 1;
1090: __END__
1091:
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