1: # The LearningOnline Network with CAPA
2: # various response type definitons response definition
3: #
4: # $Id: response.pm,v 1.192 2008/06/14 16:34:54 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,$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: }
395: } elsif ($target eq 'answer' || $target eq 'grade') {
396: &Apache::response::reset_params();
397: } elsif ($target eq 'meta') {
398: $result .= &Apache::response::meta_package_write('customresponse');
399: }
400: return $result;
401: }
402:
403: sub end_customresponse {
404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
405: my $result;
406: my $part=$Apache::inputtags::part;
407: my $id=$Apache::inputtags::response[-1];
408: if ( $target eq 'grade' && &Apache::response::submitted() ) {
409: my $response = &Apache::response::getresponse();
410: if ($Apache::lonhomework::type eq 'exam' ||
411: &Apache::response::submitted('scantron')) {
412: &Apache::response::scored_response($part,$id);
413: } elsif ( $response =~ /[^\s]/ &&
414: $Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
415: if (!$Apache::lonxml::default_homework_loaded) {
416: &Apache::lonxml::default_homework_load($safeeval);
417: }
418: my %previous = &Apache::response::check_for_previous($response,
419: $part,$id);
420: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
421: $response;
422: my $error;
423: ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
424: $response;
425:
426: my $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
427: if (!&Apache::inputtags::valid_award($award)) {
428: $error = $award;
429: $award = 'ERROR';
430: }
431: &Apache::response::handle_previous(\%previous,$award);
432: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
433: $award;
434: if ($error) {
435: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
436: $error;
437: }
438: }
439: } elsif ( $target eq 'answer') {
440: $result = &Apache::response::answer_header('customresponse');
441: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
442: $safeeval);
443: if ($env{'form.answer_output_mode'} ne 'tex') {
444: $answer = '<b>'.$answer.'</b>';
445: }
446: $result .= &Apache::response::answer_part('customresponse',$answer);
447: $result .= &Apache::response::answer_footer('customresponse');
448: }
449: if ($target eq 'web') {
450: &setup_prior_tries_hash(\&format_prior_response_math);
451: }
452: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
453: $target eq 'tex' || $target eq 'analyze') {
454: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
455: "$part.$id");
456: if ($target eq 'analyze') {
457: $Apache::lonhomework::analyze{"$part.$id.type"} = 'customresponse';
458: &Apache::lonhomework::set_bubble_lines();
459: }
460: }
461: pop(@Apache::lonxml::namespace);
462: pop(@Apache::response::custom_answer);
463: pop(@Apache::response::custom_answer_type);
464: &Apache::lonxml::deregister('Apache::response',('answer'));
465: &Apache::response::end_response();
466: return $result;
467: }
468:
469: sub format_prior_response_custom {
470: my ($mode,$answer) =@_;
471: return '<span class="LC_prior_custom">'.
472: &HTML::Entities::encode($answer,'"<>&').'</span>';
473: }
474:
475: sub start_mathresponse {
476: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
477: my $id = &Apache::response::start_response($parstack,$safeeval);
478: push(@Apache::lonxml::namespace,'mathresponse');
479: my $result;
480: @Apache::response::custom_answer=();
481: @Apache::response::custom_answer_type=();
482: &Apache::lonxml::register('Apache::response',('answer'));
483: if ($target eq 'web') {
484: if ( &Apache::response::show_answer() ) {
485: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
486: $safeeval);
487: $Apache::inputtags::answertxt{$id}=[$answer];
488: }
489: if ($Apache::inputtags::status['-1'] eq 'CAN_ANSWER') {
490: $result.=&edit_mathresponse_button($id,"HWVAL_$id");
491: }
492:
493: } elsif ($target eq 'edit') {
494: $result.=&Apache::edit::tag_start($target,$token);
495: $result.=&Apache::edit::text_arg('String to display for answer:',
496: 'answerdisplay',$token);
497: $result.=&Apache::edit::select_arg('Algebra System:',
498: 'cas',
499: ['maxima'],
500: $token);
501: $result.=&Apache::edit::text_arg('Argument Array:',
502: 'args',$token);
503: $result.=&Apache::edit::text_arg('Libraries:',
504: 'libraries',$token);
505: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
506: } elsif ($target eq 'modified') {
507: my $constructtag;
508: $constructtag=&Apache::edit::get_new_args($token,$parstack,
509: $safeeval,'answerdisplay','cas','args','libraries');
510: if ($constructtag) {
511: $result = &Apache::edit::rebuild_tag($token);
512: }
513: } elsif ($target eq 'answer' || $target eq 'grade') {
514: &Apache::response::reset_params();
515: } elsif ($target eq 'meta') {
516: $result .= &Apache::response::meta_package_write('mathresponse');
517: }
518: return $result;
519: }
520:
521: sub edit_mathresponse_button {
522: my ($id,$field)=@_;
523: my $button=&mt('Edit Answer');
524: return(<<ENDFORMULABUTTON);
525: <script language="JavaScript">
526: function edit_${id}_${field} (textarea) {
527: thenumber = textarea;
528: thedata = document.forms['lonhomework'].elements[textarea].value;
529: newwin = window.open("/adm/dragmath/applet/MaximaPopup.html","","width=565,height=400,resizable");
530: }
531: </script>
532: <input type='button' value='$button' onclick="javascript:edit_${id}_${field}('${field}');void(0);" />
533: ENDFORMULABUTTON
534: }
535:
536: sub end_mathresponse {
537: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
538: my $result;
539: my $part=$Apache::inputtags::part;
540: my $id=$Apache::inputtags::response[-1];
541: if ( $target eq 'grade' && &Apache::response::submitted() ) {
542: my $response = &Apache::response::getresponse();
543: if ( $response =~ /[^\s]/ ) {
544: if (!$Apache::lonxml::default_homework_loaded) {
545: &Apache::lonxml::default_homework_load($safeeval);
546: }
547: my %previous = &Apache::response::check_for_previous($response,
548: $part,$id);
549: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
550: $response;
551: my $error;
552: my $award;
553: my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
554: if ($cas eq 'maxima') {
555: my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
556: $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args,
557: &Apache::lonxml::get_param('libraries',$parstack,$safeeval));
558: }
559: if (!&Apache::inputtags::valid_award($award)) {
560: $error = $award;
561: $award = 'ERROR';
562: }
563: &Apache::response::handle_previous(\%previous,$award);
564: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
565: $award;
566: if ($error) {
567: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
568: $error;
569: }
570: }
571: }
572: if ($target eq 'web') {
573: &setup_prior_tries_hash(\&format_prior_response_math);
574: }
575:
576: pop(@Apache::lonxml::namespace);
577: pop(@Apache::response::custom_answer);
578: pop(@Apache::response::custom_answer_type);
579: &Apache::lonxml::deregister('Apache::response',('answer'));
580: &Apache::response::end_response();
581: return $result;
582: }
583:
584: sub format_prior_response_math {
585: my ($mode,$answer) =@_;
586: return '<span class="LC_prior_math">'.
587: &HTML::Entities::encode($answer,'"<>&').'</span>';
588: }
589:
590: sub implicit_multiplication {
591: my ($expression)=@_;
592: # Escape scientific notation, so 3e8 does not become 3*e*8
593: # 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
594: $expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
595: # 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
596: $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
597: # Fill in multiplication signs
598: # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
599: $expression=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
600: # )( -> )*(; ) ( -> )*(
601: $expression=~s/\)\s*\(/\)\*\(/gs;
602: # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
603: $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
604: # a ( -> a*(
605: $expression=~s/([A-Za-z0-9])\s+\(/$1\*\(/gs;
606: # )a -> )*a; )3 -> )*3; ) 3 -> )*3
607: $expression=~s/\)\s*([A-Za-z0-9])/\)\*$1/gs;
608: # 3&8 -> 3e8; 3&-4 -> 3e-4
609: $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
610: return $expression;
611: }
612:
613: sub start_answer {
614: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
615: my $result;
616: push(@Apache::response::custom_answer,
617: &Apache::lonxml::get_all_text_unbalanced("/answer",$parser));
618: push(@Apache::response::custom_answer_type,
619: lc(&Apache::lonxml::get_param('type',$parstack,$safeeval)));
620: $Apache::response::custom_answer_type[-1] =~ s/\s+//g;
621: if ($target eq "edit" ) {
622: $result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
623: $result.=&Apache::edit::editfield($token->[1],
624: $Apache::response::custom_answer[-1],
625: '',80,4);
626: } elsif ( $target eq "modified" ) {
627: $result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
628: }
629: return $result;
630: }
631:
632: sub end_answer {
633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
634: if ($target eq 'edit' ) {
635: return &Apache::edit::end_table();
636: }
637: }
638:
639: sub decide_package {
640: my ($tagstack)=@_;
641: my $package;
642: if ($$tagstack[-1] eq 'parameter') {
643: $package='part';
644: } else {
645: my $i=-1;
646: while (defined($$tagstack[$i])) {
647: if ($$tagstack[$i] =~ /(response|hint)$/) {
648: $package=$$tagstack[$i];
649: last;
650: }
651: $i--;
652: }
653: }
654: return $package;
655: }
656:
657: sub start_responseparam {
658: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
659: my $result='';
660: if ($target eq 'meta') {
661: $result = &meta_parameter_write($token->[2]->{'name'},
662: $token->[2]->{'type'},
663: $token->[2]->{'default'},
664: $token->[2]->{'description'});
665: } elsif ($target eq 'edit') {
666: $result.=&Apache::edit::tag_start($target,$token);
667: my $optionlist;
668: my $package=&decide_package($tagstack);
669: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
670: if ($key =~ /^\Q$package\E&(.*)&display$/) {
671: $optionlist.='<option value="'.$1.'">'.
672: $Apache::lonnet::packagetab{$key}.'</option>';
673: }
674: }
675: if (defined($optionlist)) {
676: $result.='Use template: <select name="'.
677: &Apache::edit::html_element_name('parameter_package').'">'.
678: '<option value=""></option>'.$optionlist.'</select><br />';
679: }
680: $result.=&Apache::edit::text_arg('Name:','name',$token).
681: &Apache::edit::text_arg('Type:','type',$token).
682: &Apache::edit::text_arg('Description:','description',$token).
683: &Apache::edit::text_arg('Default:','default',$token).
684: "</td></tr>";
685: $result.=&Apache::edit::end_table;
686: } elsif ($target eq 'modified') {
687: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
688: $safeeval,'name','type',
689: 'description','default');
690: my $element=&Apache::edit::html_element_name('parameter_package');
691: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
692: my $name=$env{"form.$element"};
693: my $tag=&decide_package($tagstack);
694: $token->[2]->{'name'}=$name;
695: $token->[2]->{'type'}=
696: $Apache::lonnet::packagetab{"$tag&$name&type"};
697: $token->[2]->{'description'}=
698: $Apache::lonnet::packagetab{"$tag&$name&display"};
699: $token->[2]->{'default'}=
700: $Apache::lonnet::packagetab{"$tag&$name&default"};
701: $token->[3] = ['name','type','description','default'];
702: $constructtag=1;
703: }
704: if ($constructtag) {
705: $result = &Apache::edit::rebuild_tag($token);
706: }
707: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
708: $target eq 'tex' || $target eq 'analyze' ) {
709: if ($env{'request.state'} eq 'construct') {
710: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
711: my $default=&Apache::lonxml::get_param('default',$parstack,
712: $safeeval);
713: if ($name) {$Apache::inputtags::params{$name}=$default;}
714: }
715: }
716: return $result;
717: }
718:
719: sub end_responseparam {
720: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
721: if ($target eq 'edit') { return ('','no'); }
722: return '';
723: }
724:
725: sub start_parameter {
726: return &start_responseparam(@_);
727: }
728:
729: sub end_parameter {
730: return &end_responseparam(@_);
731: }
732:
733: sub reset_params {
734: %Apache::inputtags::params=();
735: }
736:
737: sub setup_params {
738: my ($tag,$safeeval) = @_;
739:
740: if ($env{'request.state'} eq 'construct') { return; }
741: my %paramlist=();
742: foreach my $key (keys(%Apache::lonnet::packagetab)) {
743: if ($key =~ /^\Q$tag\E/) {
744: my ($package,$name) = split(/&/,$key);
745: $paramlist{$name}=1;
746: }
747: }
748: foreach my $key (keys(%paramlist)) {
749: my $entry= 'resource.'.$Apache::inputtags::part;
750: if (defined($Apache::inputtags::response[-1])) {
751: $entry.='_'.$Apache::inputtags::response[-1];
752: }
753: $entry.='.'.$key;
754: &Apache::lonxml::debug("looking for $entry");
755: my $value = &Apache::lonnet::EXT("$entry");
756: &Apache::lonxml::debug("$key has value :$value:");
757: if ($value eq 'con_lost' || $value =~ /^error:/) {
758: &Apache::lonxml::debug("using nothing");
759: $Apache::inputtags::params{$key}='';
760: } else {
761: my $string="{return qq\0".$value."\0}";
762: my $newvalue=&Apache::run::run($string,$safeeval,1);
763: if (defined($newvalue)) { $value=$newvalue; }
764: $Apache::inputtags::params{$key}=$value;
765: }
766: }
767: }
768:
769: {
770: my @answer_bits;
771: my $need_row_start;
772:
773: sub answer_header {
774: my ($type,$increment,$rows) = @_;
775: my $result;
776: if ($env{'form.answer_output_mode'} eq 'tex') {
777: undef(@answer_bits);
778: my $bit;
779: if ($Apache::lonhomework::type eq 'exam') {
780: $bit = ($Apache::lonxml::counter+$increment).') ';
781: } else {
782: $bit .= ' Answer for Part: \verb|'.
783: $Apache::inputtags::part.'| ';
784: }
785: push(@answer_bits,$bit);
786: } else {
787: my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
788: $result = '<table border="1"><tr>';
789: if ($Apache::lonhomework::type eq 'exam') {
790: $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
791: } else {
792: $result .= $td.&mt('Answer for Part: [_1]',
793: $Apache::inputtags::part).'</td>';
794: }
795: $result .= "\n";
796: $need_row_start = 0;
797: }
798: return $result;
799: }
800:
801: sub next_answer {
802: my ($type) = @_;
803: my $result;
804: if ($env{'form.answer_output_mode'} eq 'tex') {
805: # FIXME ... need to do something with tex mode
806: } else {
807: $result .= "</tr>";
808: $need_row_start = 1;
809: }
810: return $result;
811: }
812:
813: sub answer_part {
814: my ($type,$answer,$args) = @_;
815: my $result;
816: if ($env{'form.answer_output_mode'} eq 'tex') {
817: if (!$args->{'no_verbatim'}) {
818: my $to_use='|';
819: foreach my $value (32..126) {
820: my $char=pack('c',$value);
821: if ($answer !~ /\Q$char\E/) {
822: $to_use=$char;
823: last;
824: }
825: }
826: my $fullanswer=$answer;
827: $answer='';
828: foreach my $element (split(/[\;]/,$fullanswer)) {
829: if ($element ne '') {
830: $answer.= '\verb'.$to_use.$element.$to_use.' \newline';
831: }
832: }
833: }
834: if ($answer ne '') {
835: push(@answer_bits,$answer);
836: }
837: } else {
838: if ($need_row_start) {
839: $result .= '<tr>';
840: $need_row_start = 0;
841: }
842: $result .= '<td>'.$answer.'</td>';
843: }
844: return $result;
845: }
846:
847: sub answer_footer {
848: my ($type) = @_;
849: my $result;
850: if ($env{'form.answer_output_mode'} eq 'tex') {
851: $result = ' \vskip 0 mm \noindent \begin{tabular}{|p{1.5cm}|p{6.8cm}|}\hline ';
852: $result .= $answer_bits[0].'&\vspace*{-4mm}\begin{itemize}';
853: for (my $i=1;$i<=$#answer_bits;$i++) {
854: $result.='\item '.$answer_bits[$i].'\vspace*{-7mm}';
855: }
856: $result .= ' \end{itemize} \\\\ \hline \end{tabular} \vskip 0 mm ';
857: } else {
858: if (!$need_row_start) {
859: $result .= '</tr>';
860: }
861: $result .= '</table>';
862: }
863: return $result;
864: }
865:
866: }
867:
868: sub showallfoils {
869: if (defined($env{'form.showallfoils'})) {
870: my ($symb)=&Apache::lonnet::whichuser();
871: if (($env{'request.state'} eq 'construct') ||
872: ($env{'user.adv'} && $symb eq '') ||
873: ($Apache::lonhomework::viewgrades) ) {
874: return 1;
875: }
876: }
877: if ($Apache::lonhomework::type eq 'survey') { return 1; }
878: return 0;
879: }
880:
881: =pod
882:
883: =item &getresponse($offset,$resulttype);
884:
885: Retreives the current submitted response, helps out in the case of
886: scantron mode.
887:
888: Returns either the exact text of the submission, or a bubbled response
889: converted to something usable.
890:
891: Optional Arguments:
892: $offset - (defaults to 1) if a problem has more than one bubble
893: response, pass in the number of the bubble wanted, (the
894: first bubble associated with a problem has an offset of 1,
895: the second bubble is 2
896:
897: $resulttype - undef -> a number between 0 and 25
898: 'A is 1' -> a number between 1 and 26
899: 'letter' -> a letter between 'A' and 'Z'
900: $lines - undef problem only needs a single line of bubbles.
901: nonzero Problem wants the first nonempty response in
902: $lines lines of bubbles.
903: $bubbles_per_line - Must be provided if lines is defined.. number of
904: bubbles on a line.
905:
906: =cut
907:
908: sub getresponse {
909: my ($offset,$resulttype, $lines, $bubbles_per_line)=@_;
910: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
911: my $response;
912: if (!defined($offset)) {
913: $offset=1;
914: } else {
915: $formparm.=":$offset";
916: }
917: if (!defined($lines)) {
918: $lines = 1;
919: }
920: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
921: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
922: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
923: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
924: if ($env{'form.submitted'} eq 'scantron') {
925: my $part = $Apache::inputtags::part;
926: my $id = $Apache::inputtags::response[-1];
927:
928: my $line;
929: for ($line = 0; $line < $lines; $line++) {
930: my $theline = $Apache::lonxml::counter+$offset-1+$line;
931: $response = $env{"scantron.$theline.answer"};
932: if ((defined($response)) && ($response ne "") && ($response ne " ")) {
933: last;
934: }
935:
936: }
937:
938: # save bubbled letter for later
939: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
940: $response;
941: if ($resulttype ne 'letter') {
942: if ($resulttype eq 'A is 1') {
943: $response = $let_to_num{$response}+1;
944: } else {
945: $response = $let_to_num{$response};
946: }
947: if ($response ne "") {
948: $response += $line * $bubbles_per_line;
949: }
950: } else {
951: if ($response ne "") {
952: $response = chr(ord($response) + $line * $bubbles_per_line);
953: }
954: }
955:
956: } else {
957: $response = $env{$formparm};
958: }
959: #
960: # If we have a nonempty answer, correct the numeric value
961: # of the answer for the line on which it was found.
962: #
963:
964: return $response;
965: }
966:
967: =pod
968:
969: =item &repetition();
970:
971: Returns the number of lines that are required to encode the weight.
972: (Currently expects that there are 10 bubbles per line)
973:
974: =cut
975:
976: sub repetition {
977: my $id = $Apache::inputtags::part;
978: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
979: if (!defined($weight) || ($weight eq '')) { $weight=1; }
980: my $repetition = int($weight/10);
981: if ($weight % 10 != 0) { $repetition++; }
982: return $repetition;
983: }
984:
985: =pod
986:
987: =item &scored_response($part_id,$response_id);
988:
989: Sets the results hash elements
990:
991: resource.$part_id.$response_id.awarded - to the floating point
992: number between 0 and 1 that was awarded on the bubbled input
993:
994: resource.$part_id.$response_id.awarddetail - to 'ASSIGNED_SCORE'
995:
996: Returns
997:
998: the number of bubble sheet lines that were used (and likely need to
999: be passed to &Apache::lonxml::increment_counter()
1000:
1001: Arguments
1002:
1003: $part_id - id of the part to grade
1004: $response_id - id of the response to grade
1005:
1006:
1007: =cut
1008:
1009: sub scored_response {
1010: my ($part,$id)=@_;
1011: my $repetition=&repetition();
1012: my $score=0;
1013: for (my $i=0;$i<$repetition;$i++) {
1014: # A is 1, B is 2, etc. (get response return 0-9 and then we add 1)
1015: my $increase=&Apache::response::getresponse($i+1);
1016: if ($increase ne '') { $score+=$increase+1; }
1017: }
1018: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
1019: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
1020: my $pcr=$score/$weight;
1021: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
1022: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
1023: 'ASSIGNED_SCORE';
1024: return $repetition;
1025: }
1026:
1027: sub whichorder {
1028: my ($max,$randomize,$showall,$hash)=@_;
1029: #&Apache::lonxml::debug("man $max randomize $randomize");
1030: if (!defined(@{ $$hash{'names'} })) { return; }
1031: my @names = @{ $$hash{'names'} };
1032: my @whichopt =();
1033: my (%top,@toplist,%bottom,@bottomlist);
1034: if (!($showall || ($randomize eq 'no'))) {
1035: my $current=0;
1036: foreach my $name (@names) {
1037: $current++;
1038: if ($$hash{"$name.location"} eq 'top') {
1039: $top{$name}=$current;
1040: } elsif ($$hash{"$name.location"} eq 'bottom') {
1041: $bottom{$name}=$current;
1042: }
1043: }
1044: }
1045: my $topcount=0;
1046: my $bottomcount=0;
1047: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
1048: && ($#names > -1)) {
1049: #&Apache::lonxml::debug("Have $#whichopt max is $max");
1050: my $aopt;
1051: if ($showall || ($randomize eq 'no')) {
1052: $aopt=0;
1053: } else {
1054: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
1055: }
1056: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
1057: $aopt=splice(@names,$aopt,1);
1058: #&Apache::lonxml::debug("Picked $aopt");
1059: if ($top{$aopt}) {
1060: $toplist[$top{$aopt}]=$aopt;
1061: $topcount++;
1062: } elsif ($bottom{$aopt}) {
1063: $bottomlist[$bottom{$aopt}]=$aopt;
1064: $bottomcount++;
1065: } else {
1066: push (@whichopt,$aopt);
1067: }
1068: }
1069: for (my $i=0;$i<=$#toplist;$i++) {
1070: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
1071: }
1072: for (my $i=0;$i<=$#bottomlist;$i++) {
1073: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
1074: }
1075: return @whichopt;
1076: }
1077:
1078: sub show_answer {
1079: my $part = $Apache::inputtags::part;
1080: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
1081: my $status = $Apache::inputtags::status[-1];
1082: return ( ($award =~ /^correct/
1083: && &Apache::lonhomework::show_problem_status())
1084: || $status eq "SHOW_ANSWER");
1085: }
1086:
1087: sub analyze_store_foilgroup {
1088: my ($shown,$attrs)=@_;
1089: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
1090: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
1091: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
1092: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
1093: foreach my $attr (@$attrs) {
1094: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
1095: $Apache::response::foilgroup{"$name.".$attr};
1096: }
1097: }
1098: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
1099: }
1100:
1101: sub check_if_computed {
1102: my ($token,$parstack,$safeeval,$name)=@_;
1103: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
1104: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
1105: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
1106: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
1107: }
1108: }
1109:
1110: sub pick_foil_for_concept {
1111: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
1112: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
1113: my @names = @{ $Apache::response::conceptgroup{'names'} };
1114: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
1115: my $name=$names[$pick];
1116: push @{ $Apache::response::foilgroup{'names'} }, $name;
1117: foreach my $attr (@$attrs) {
1118: $Apache::response::foilgroup{"$name.".$attr} =
1119: $Apache::response::conceptgroup{"$name.".$attr};
1120: }
1121: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
1122: $Apache::response::foilgroup{"$name.concept"} = $concept;
1123: &Apache::lonxml::debug("Selecting $name in $concept");
1124: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
1125: if ($target eq 'analyze') {
1126: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
1127: $concept);
1128: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
1129: $Apache::response::conceptgroup{'names'};
1130: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
1131: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
1132: $name);
1133: foreach my $attr (@$attrs) {
1134: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
1135: $Apache::response::conceptgroup{"$name.$attr"};
1136: }
1137: }
1138: }
1139: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
1140: $hinthash->{"$part_id.concept.$concept"}=
1141: $Apache::response::conceptgroup{'names'};
1142:
1143: }
1144: #------------------------------------------------------------
1145: #
1146: # Get a parameter associated with a problem.
1147: # Parameters:
1148: # $id - the id of the paramater, either a part id,
1149: # or a partid and responspe id joined by _
1150: # $name - Name of the parameter to fetch
1151: # $default - Default value for the paramter.
1152: #
1153: #
1154: #
1155: sub get_response_param {
1156: my ($id,$name,$default)=@_;
1157: my $parameter;
1158: if ($env{'request.state'} eq 'construct' &&
1159: defined($Apache::inputtags::params{$name})) {
1160: $parameter=$Apache::inputtags::params{$name};
1161: } else {
1162: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
1163: }
1164: if (!defined($parameter) || $parameter eq '') {
1165: $parameter = $default;
1166: }
1167: return $parameter;
1168: }
1169:
1170: sub submitted {
1171: my ($who)=@_;
1172:
1173: # when scatron grading any submission is a submission
1174: if ($env{'form.submitted'} eq 'scantron') { return 1; }
1175: # if the caller only cared if this was a scantron submission
1176: if ($who eq 'scantron') { return 0; }
1177: # if the Submit Answer button for this particular part was pressed
1178: my $partid=$Apache::inputtags::part;
1179: if ($env{'form.submitted'} eq "part_$partid") {
1180: return 1;
1181: }
1182: if ($env{'form.submitted'} eq "yes"
1183: && defined($env{'form.submit_'.$partid})) {
1184: return 1;
1185: }
1186: # Submit All button on a .page was pressed
1187: if (defined($env{'form.all_submit'})) { return 1; }
1188: # otherwise no submission occured
1189: return 0;
1190: }
1191:
1192: sub add_to_gradingqueue {
1193: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1194: if ( $courseid eq ''
1195: || $symb eq ''
1196: || $env{'request.state'} eq 'construct'
1197: || $Apache::lonhomework::type ne 'problem') {
1198: return;
1199: }
1200:
1201: my %queue_info = ( 'type' => 'problem',
1202: 'time' => time);
1203:
1204: if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
1205: $queue_info{'slot'}=
1206: $Apache::lonhomework::history{"resource.0.checkedin.slot"};
1207: }
1208:
1209: my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
1210: if ($result ne 'ok') {
1211: &Apache::lonxml::error("add_to_queue said $result");
1212: }
1213: }
1214:
1215: # basically undef and 0 (both false) mean that they still have work to do
1216: # and all true values mean that they can't do any more work
1217: #
1218: # a return of undef means it is unattempted
1219: # a return of 0 means it is attmpted and wrong but still has tries
1220: # a return of 1 means it is marked correct
1221: # a return of 2 means they have exceed maximum number of tries
1222: # a return of 3 means it after the answer date
1223: sub check_status {
1224: my ($id)=@_;
1225: if (!defined($id)) { $id=$Apache::inputtags::part; }
1226: my $curtime=&Apache::lonnet::EXT('system.time');
1227: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
1228: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
1229: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
1230: if ( $opendate && $curtime > $opendate &&
1231: $duedate && $curtime > $duedate &&
1232: $answerdate && $curtime > $answerdate) {
1233: return 3;
1234: }
1235: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
1236: if ($status =~ /^correct/) { return 1; }
1237: if (!$status) { return undef; }
1238: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
1239: if ($maxtries eq '') { $maxtries=2; }
1240: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
1241: if ($curtries < $maxtries) { return 0; }
1242: return 2;
1243: }
1244:
1245: =pod
1246:
1247: =item setup_prior_tries_hash($func,$data)
1248:
1249: Foreach each past .submission $func is called with 3 arguments
1250: - the mode to set things up for (currently always 'grade')
1251: - the stored .submission string
1252: - The expansion of $data
1253:
1254: $data is an array ref containing elements that are either
1255: - scalars that are other elements of the history hash to pass to $func
1256: - ref to data to be passed untouched to $func
1257:
1258: =cut
1259:
1260: sub setup_prior_tries_hash {
1261: my ($func,$data) = @_;
1262: my $part = $Apache::inputtags::part;
1263: my $id = $Apache::inputtags::response[-1];
1264: foreach my $i (1..$Apache::lonhomework::history{'version'}) {
1265: my $sub_key = "$i:resource.$part.$id.submission";
1266: next if (!exists($Apache::lonhomework::history{$sub_key}));
1267: my @other_data;
1268: foreach my $datum (@{ $data }) {
1269: if (ref($datum)) {
1270: push(@other_data,$datum);
1271: } else {
1272: my $info_key = "$i:resource.$part.$id.$datum";
1273: push(@other_data,$Apache::lonhomework::history{$info_key});
1274: }
1275: }
1276:
1277: my $output =
1278: &$func('grade',
1279: $Apache::lonhomework::history{$sub_key},
1280: \@other_data);
1281: if (defined($output)) {
1282: $Apache::inputtags::submission_display{$sub_key} = $output;
1283: }
1284: }
1285: }
1286:
1287: 1;
1288: __END__
1289:
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