Annotation of loncom/homework/response.pm, revision 1.155
1.38 albertel 1: # The LearningOnline Network with CAPA
1.1 albertel 2: # various response type definitons response definition
1.53 albertel 3: #
1.155 ! www 4: # $Id: response.pm,v 1.154 2006/12/11 22:02:13 www Exp $
1.53 albertel 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: #
1.5 www 28:
1.1 albertel 29: package Apache::response;
30: use strict;
1.93 albertel 31: use Apache::lonlocal;
1.120 albertel 32: use Apache::lonnet;
1.153 www 33: use Apache::lonmaxima();
1.1 albertel 34:
1.57 harris41 35: BEGIN {
1.139 www 36: &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse','customresponse','mathresponse'));
1.1 albertel 37: }
38:
1.13 albertel 39: sub start_response {
1.73 albertel 40: my ($parstack,$safeeval)=@_;
1.136 albertel 41: my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.73 albertel 42: if ($#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,$id);
49: @Apache::inputtags::inputlist=();
1.101 albertel 50: if ($Apache::inputtags::part eq '' &&
51: !$Apache::lonhomework::ignore_response_errors) {
1.97 albertel 52: &Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
1.92 albertel 53: }
54: if ($Apache::inputtags::response_with_no_part &&
55: $Apache::inputtags::part ne '0') {
1.97 albertel 56: &Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
1.92 albertel 57: }
58: if ($Apache::inputtags::part eq '0') {
59: $Apache::inputtags::response_with_no_part=1;
60: }
1.73 albertel 61: return $id;
1.13 albertel 62: }
63:
64: sub end_response {
1.79 albertel 65: #pop @Apache::inputtags::response;
1.73 albertel 66: @Apache::inputtags::inputlist=();
67: return '';
1.13 albertel 68: }
69:
1.41 albertel 70: sub start_hintresponse {
1.73 albertel 71: my ($parstack,$safeeval)=@_;
1.136 albertel 72: my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.123 albertel 73: push (@Apache::inputtags::hint,$id);
74: push (@Apache::inputtags::hintlist,$id);
1.73 albertel 75: push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
76: return $id;
1.41 albertel 77: }
78:
79: sub end_hintresponse {
1.123 albertel 80: pop @Apache::inputtags::hint;
1.73 albertel 81: if (defined($Apache::inputtags::paramstack[-1])) {
82: %Apache::inputtags::params=
83: @{ pop(@Apache::inputtags::paramstack) };
84: }
85: return '';
1.41 albertel 86: }
87:
1.99 albertel 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();
1.127 albertel 96: push(@randomseeds,\@seed);
1.99 albertel 97: }
1.127 albertel 98: &Apache::response::setrandomnumber(@_);
1.99 albertel 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(@$seed);
109: } else {
110: &Apache::lonxml::error("Unable to restore random algorithm.");
111: }
112: }
1.117 albertel 113:
1.26 albertel 114: sub setrandomnumber {
1.127 albertel 115: my ($ignore_id2) = @_;
1.73 albertel 116: my $rndseed;
1.88 albertel 117: $rndseed=&Apache::structuretags::setup_rndseed();
118: if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
1.73 albertel 119: &Apache::lonxml::debug("randseed $rndseed");
120: # $rndseed=unpack("%32i",$rndseed);
1.99 albertel 121: my $rand_alg=&Apache::lonnet::get_rand_alg();
1.126 albertel 122: my ($rndmod,$rndmod2);
1.119 albertel 123:
124: my ($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) {
1.141 albertel 132: $id1=&Apache::bridgetask::get_dim_id();
133: if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
134: $id2=$Apache::bridgetask::instance{$id1}[-1];
1.142 albertel 135: $shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
136: } else {
137: $shift_amt=0;
1.119 albertel 138: }
139: }
140: &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
1.99 albertel 141: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
142: $rand_alg eq '64bit2') {
1.119 albertel 143: $rndmod=(&Apache::lonnet::numval($id1) << 10);
144: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
1.110 albertel 145: } elsif ($rand_alg eq '64bit3') {
1.119 albertel 146: $rndmod=(&Apache::lonnet::numval2($id1) << 10);
147: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
1.126 albertel 148: } elsif ($rand_alg eq '64bit4') {
1.119 albertel 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) << $shift );
1.110 albertel 153: }
1.126 albertel 154: } else {
155: ($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
1.99 albertel 156: }
1.127 albertel 157:
1.99 albertel 158: if ($rndseed =~/([,:])/) {
159: my $char=$1;
160: use integer;
161: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
162: $num1+=$rndmod;
1.126 albertel 163: $num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
1.109 albertel 164: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
1.99 albertel 165: $rndseed=$num1.$char.$num2;
166: } else {
1.74 albertel 167: $rndseed+=$rndmod;
1.109 albertel 168: if($Apache::lonnet::_64bit) {
169: use integer;
170: $rndseed=(($rndseed<<32)>>32);
171: }
1.74 albertel 172: }
1.111 albertel 173: &Apache::lonxml::debug("randseed $rndmod $rndseed");
1.74 albertel 174: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.73 albertel 175: return '';
1.26 albertel 176: }
177:
1.7 www 178: sub meta_parameter_write {
1.38 albertel 179: my ($name,$type,$default,$display)=@_;
1.41 albertel 180: my $partref=$Apache::inputtags::part;
181: my $result='<parameter part="'.$Apache::inputtags::part.'"';
182: if (defined($Apache::inputtags::response[-1])) {
1.73 albertel 183: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
184: $partref.='_'.$Apache::inputtags::response[-1];
1.41 albertel 185: }
186: $result.= ' name="'.$name.'"'.
187: ' type="'.$type.'"'.
1.89 albertel 188: (defined($default)?' default="'.$default.'"':'').
189: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
1.41 albertel 190: .'></parameter>'
191: ."\n";
192: return $result;
1.33 www 193: }
194:
195: sub meta_package_write {
196: my $name=shift;
1.41 albertel 197: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
198: if(defined($Apache::inputtags::response[-1])) {
1.73 albertel 199: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
1.41 albertel 200: }
201: $result.=' package="'.$name.'"></parameter>'."\n";
202: return $result;
1.7 www 203: }
204:
205: sub meta_stores_write {
1.10 www 206: my ($name,$type,$display)=@_;
1.41 albertel 207: my $partref=$Apache::inputtags::part;
208: my $result = '<stores part="'.$Apache::inputtags::part.'"';
209: if (defined($Apache::inputtags::response[-1])) {
1.73 albertel 210: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
211: $partref.='_'.$Apache::inputtags::response[-1];
1.41 albertel 212: }
213: $result.= ' name="'.$name.'"'.
214: ' type="'.$type.'"'.
215: ' display="'.$display.' [Part: '.$partref.']"'.
216: "></stores>\n";
1.7 www 217: }
218:
219: sub mandatory_part_meta {
220: #
221: # Autogenerate metadata for mandatory
222: # input (from RAT or lonparmset) and
223: # output (to lonspreadsheet)
224: # of each part
225: #
1.73 albertel 226: return
1.34 www 227: # &meta_parameter_write('opendate','date_start','',
228: # 'Opening Date').
229: # &meta_parameter_write('duedate','date_end','',
230: # 'Due Date').
231: # &meta_parameter_write('answerdate','date_start','',
232: # 'Show Answer Date').
233: # &meta_parameter_write('weight','int_zeropos','',
234: # 'Available Points').
235: # &meta_parameter_write('maxtries','int_pos','',
236: # 'Maximum Number of Tries').
1.73 albertel 237: &meta_package_write('part').
238: &meta_stores_write('solved','string',
239: 'Problem Status').
240: &meta_stores_write('tries','int_zeropos',
241: 'Number of Attempts').
242: &meta_stores_write('awarded','float',
243: 'Partial Credit Factor');
1.7 www 244: #
245: # Note: responseid-specific data 'submission' and 'awarddetail'
246: # not available to spreadsheet -> skip here
247: #
1.86 albertel 248: }
249:
250: sub meta_part_order {
251: if (@Apache::inputtags::partlist) {
252: my @parts=@Apache::inputtags::partlist;
253: shift(@parts);
1.100 albertel 254: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
1.86 albertel 255: } else {
1.100 albertel 256: return '<partorder>0</partorder>'."\n";
257: }
258: }
259:
260: sub meta_response_order {
261: if (@Apache::inputtags::responselist) {
262: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
263: '</responseorder>'."\n";
1.86 albertel 264: }
1.14 albertel 265: }
266:
1.15 albertel 267: sub check_for_previous {
1.73 albertel 268: my ($curresponse,$partid,$id) = @_;
269: my %previous;
270: $previous{'used'} = 0;
271: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
1.98 albertel 272: if ($key =~ /resource\.$partid\.$id\.submission$/) {
1.73 albertel 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'}:$previous{'used'}:");
289: }
1.32 albertel 290: }
1.73 albertel 291: }
292: &Apache::lonhomework::showhash(%previous);
293: return %previous;
1.54 albertel 294: }
295:
296: sub handle_previous {
1.73 albertel 297: my ($previous,$ad)=@_;
298: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
299: if ($$previous{'last'}) {
300: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
1.107 albertel 301: push(@Apache::inputtags::previous_version,$$previous{'version'});
302: } elsif ($Apache::lonhomework::type ne 'survey') {
1.73 albertel 303: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
1.107 albertel 304: push(@Apache::inputtags::previous_version,$$previous{'version'});
1.73 albertel 305: }
1.54 albertel 306: }
1.44 albertel 307: }
308:
1.45 albertel 309: sub view_or_modify {
1.149 albertel 310: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.73 albertel 311: my $myself=0;
1.120 albertel 312: if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
1.73 albertel 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 '';
1.45 albertel 321: }
322:
1.44 albertel 323: sub start_dataresponse {
1.73 albertel 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;
1.44 albertel 336: }
337:
338: sub end_dataresponse {
1.73 albertel 339: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
340: my $result;
341: if ( $target eq 'web' ) {
342: } elsif ($target eq 'grade' ) {
1.120 albertel 343: if ( defined $env{'form.submitted'}) {
1.149 albertel 344: my ($symb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
1.73 albertel 345: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
346: if ($allowed) {
1.94 albertel 347: &Apache::response::setup_params('dataresponse',$safeeval);
1.73 albertel 348: my $partid = $Apache::inputtags::part;
349: my $id = $Apache::inputtags::response['-1'];
1.120 albertel 350: my $response = $env{'form.HWVAL_'.$id};
1.73 albertel 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: }
1.45 albertel 360: }
1.73 albertel 361: }
362: &Apache::response::end_response;
363: return $result;
1.3 albertel 364: }
365:
1.129 albertel 366: sub start_customresponse {
1.128 albertel 367: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
368: my $id = &Apache::response::start_response($parstack,$safeeval);
1.129 albertel 369: push(@Apache::lonxml::namespace,'customresponse');
1.128 albertel 370: my $result;
1.129 albertel 371: undef($Apache::response::custom_answer);
1.128 albertel 372: &Apache::lonxml::register('Apache::response',('answer'));
373: if ($target eq 'web') {
374: if ( &Apache::response::show_answer() ) {
375: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
376: $safeeval);
1.152 albertel 377: $Apache::inputtags::answertxt{$id}=[$answer];
1.128 albertel 378: }
379: } elsif ($target eq 'edit') {
380: $result.=&Apache::edit::tag_start($target,$token);
381: $result.=&Apache::edit::text_arg('String to display for answer:',
1.145 albertel 382: 'answerdisplay',$token);
1.128 albertel 383: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
384: } elsif ($target eq 'modified') {
385: my $constructtag;
386: $constructtag=&Apache::edit::get_new_args($token,$parstack,
387: $safeeval,'answerdisplay');
388: if ($constructtag) {
389: $result = &Apache::edit::rebuild_tag($token);
390: $result.=&Apache::edit::handle_insert();
391: }
392: } elsif ($target eq 'answer' || $target eq 'grade') {
393: &Apache::response::reset_params();
394: } elsif ($target eq 'meta') {
1.129 albertel 395: $result .= &Apache::response::meta_package_write('customresponse');
1.128 albertel 396: }
397: return $result;
398: }
399:
1.129 albertel 400: sub end_customresponse {
1.128 albertel 401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
402: my $result;
403: my $part=$Apache::inputtags::part;
404: my $id=$Apache::inputtags::response[-1];
405: if ( $target eq 'grade' && &Apache::response::submitted() ) {
406: my $response = &Apache::response::getresponse();
1.146 albertel 407: if ($Apache::lonhomework::type eq 'exam' ||
408: &Apache::response::submitted('scantron')) {
409: &Apache::response::scored_response($part,$id);
410: } elsif ( $response =~ /[^\s]/ &&
411: $Apache::response::custom_answer_type eq 'loncapa/perl') {
1.128 albertel 412: if (!$Apache::lonxml::default_homework_loaded) {
413: &Apache::lonxml::default_homework_load($safeeval);
414: }
415: my %previous = &Apache::response::check_for_previous($response,
416: $part,$id);
417: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
418: $response;
419: my $error;
1.129 albertel 420: ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
1.128 albertel 421: $response;
422:
1.129 albertel 423: my $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer.'}',$safeeval);
1.128 albertel 424: if (!&Apache::inputtags::valid_award($award)) {
425: $error = $award;
426: $award = 'ERROR';
427: }
428: &Apache::response::handle_previous(\%previous,$award);
429: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
430: $award;
431: if ($error) {
432: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
433: $error;
434: }
435: }
1.146 albertel 436: } elsif ( $target eq 'answer') {
437: $result = &Apache::response::answer_header('customresponse');
438: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
439: $safeeval);
440: if ($env{'form.answer_output_mode'} ne 'tex') {
441: $answer = '<b>'.$answer.'</b>';
442: }
443: $result .= &Apache::response::answer_part('customresponse',$answer);
444: $result .= &Apache::response::answer_footer('customresponse');
445: }
446: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
447: $target eq 'tex' || $target eq 'analyze') {
448: &Apache::lonxml::increment_counter(&Apache::response::repetition());
1.128 albertel 449: }
450: pop(@Apache::lonxml::namespace);
451: &Apache::lonxml::deregister('Apache::response',('answer'));
452: &Apache::response::end_response();
453: return $result;
454: }
455:
1.140 www 456:
1.139 www 457: sub start_mathresponse {
1.140 www 458: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
459: my $id = &Apache::response::start_response($parstack,$safeeval);
460: push(@Apache::lonxml::namespace,'mathresponse');
1.139 www 461: my $result;
1.140 www 462: undef($Apache::response::custom_answer);
463: &Apache::lonxml::register('Apache::response',('answer'));
464: if ($target eq 'web') {
465: if ( &Apache::response::show_answer() ) {
466: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
467: $safeeval);
1.152 albertel 468: $Apache::inputtags::answertxt{$id}=[$answer];
1.140 www 469: }
470: } elsif ($target eq 'edit') {
471: $result.=&Apache::edit::tag_start($target,$token);
472: $result.=&Apache::edit::text_arg('String to display for answer:',
473: 'answerdisplay',$token);
1.150 www 474: $result.=&Apache::edit::select_arg('Algebra System:',
475: 'cas',
476: ['maxima'],
477: $token);
478: $result.=&Apache::edit::text_arg('Argument Array:',
479: 'args',$token);
1.140 www 480: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
481: } elsif ($target eq 'modified') {
482: my $constructtag;
483: $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.153 www 484: $safeeval,'answerdisplay','cas','args');
1.140 www 485: if ($constructtag) {
486: $result = &Apache::edit::rebuild_tag($token);
487: $result.=&Apache::edit::handle_insert();
488: }
489: } elsif ($target eq 'answer' || $target eq 'grade') {
490: &Apache::response::reset_params();
491: } elsif ($target eq 'meta') {
492: $result .= &Apache::response::meta_package_write('mathresponse');
1.139 www 493: }
494: return $result;
495: }
496:
497: sub end_mathresponse {
1.140 www 498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
499: my $result;
500: my $part=$Apache::inputtags::part;
501: my $id=$Apache::inputtags::response[-1];
502: if ( $target eq 'grade' && &Apache::response::submitted() ) {
503: my $response = &Apache::response::getresponse();
1.150 www 504: if ( $response =~ /[^\s]/ ) {
1.140 www 505: if (!$Apache::lonxml::default_homework_loaded) {
506: &Apache::lonxml::default_homework_load($safeeval);
507: }
508: my %previous = &Apache::response::check_for_previous($response,
509: $part,$id);
510: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
511: $response;
512: my $error;
1.155 ! www 513: my $award;
! 514: my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
! 515: if ($cas eq 'maxima') {
! 516: my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
! 517: $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer,$response,$args);
! 518: }
1.140 www 519: if (!&Apache::inputtags::valid_award($award)) {
1.151 albertel 520: $error = $award;
521: $award = 'ERROR';
1.140 www 522: }
523: &Apache::response::handle_previous(\%previous,$award);
524: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
525: $award;
526: if ($error) {
527: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
528: $error;
529: }
530: }
531: }
532: pop(@Apache::lonxml::namespace);
533: &Apache::lonxml::deregister('Apache::response',('answer'));
534: &Apache::response::end_response();
535: return $result;
1.139 www 536: }
537:
1.140 www 538:
1.128 albertel 539: sub start_answer {
540: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
541: my $result;
1.129 albertel 542: $Apache::response::custom_answer=
1.128 albertel 543: &Apache::lonxml::get_all_text_unbalanced("/answer",$parser);
1.129 albertel 544: $Apache::response::custom_answer_type=
1.128 albertel 545: lc(&Apache::lonxml::get_param('type',$parstack,$safeeval));
1.129 albertel 546: $Apache::response::custom_answer_type =~ s/\s+//g;
1.128 albertel 547: if ($target eq "edit" ) {
548: $result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
549: $result.=&Apache::edit::editfield($token->[1],
1.129 albertel 550: $Apache::response::custom_answer,
1.128 albertel 551: '',80,4);
552: } elsif ( $target eq "modified" ) {
553: $result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
554: }
555: return $result;
556: }
557:
558: sub end_answer {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
560: if ($target eq 'edit' ) {
561: return &Apache::edit::end_table();
562: }
563: }
564:
1.83 albertel 565: sub decide_package {
566: my ($tagstack)=@_;
567: my $package;
568: if ($$tagstack[-1] eq 'parameter') {
569: $package='part';
570: } else {
571: my $i=-1;
572: while (defined($$tagstack[$i])) {
573: if ($$tagstack[$i] =~ /(response|hint)$/) {
574: $package=$$tagstack[$i];
575: last;
576: }
577: $i--;
578: }
579: }
580: return $package;
581: }
582:
1.3 albertel 583: sub start_responseparam {
1.73 albertel 584: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
585: my $result='';
586: if ($target eq 'meta') {
587: $result = &meta_parameter_write($token->[2]->{'name'},
588: $token->[2]->{'type'},
589: $token->[2]->{'default'},
590: $token->[2]->{'description'});
591: } elsif ($target eq 'edit') {
592: $result.=&Apache::edit::tag_start($target,$token);
1.83 albertel 593: my $optionlist;
594: my $package=&decide_package($tagstack);
595: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
596: if ($key =~ /^\Q$package\E&(.*)&display$/) {
597: $optionlist.='<option value="'.$1.'">'.
598: $Apache::lonnet::packagetab{$key}.'</option>';
599: }
600: }
601: if (defined($optionlist)) {
602: $result.='Use template: <select name="'.
603: &Apache::edit::html_element_name('parameter_package').'">'.
604: '<option value=""></option>'.$optionlist.'</select><br />';
605: }
1.73 albertel 606: $result.=&Apache::edit::text_arg('Name:','name',$token).
607: &Apache::edit::text_arg('Type:','type',$token).
608: &Apache::edit::text_arg('Description:','description',$token).
609: &Apache::edit::text_arg('Default:','default',$token).
610: "</td></tr>";
611: $result.=&Apache::edit::end_table;
612: } elsif ($target eq 'modified') {
1.83 albertel 613: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
614: $safeeval,'name','type',
615: 'description','default');
616: my $element=&Apache::edit::html_element_name('parameter_package');
1.120 albertel 617: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
618: my $name=$env{"form.$element"};
1.83 albertel 619: my $tag=&decide_package($tagstack);
620: $token->[2]->{'name'}=$name;
621: $token->[2]->{'type'}=
622: $Apache::lonnet::packagetab{"$tag&$name&type"};
623: $token->[2]->{'description'}=
624: $Apache::lonnet::packagetab{"$tag&$name&display"};
625: $token->[2]->{'default'}=
626: $Apache::lonnet::packagetab{"$tag&$name&default"};
627: $constructtag=1;
628: }
1.73 albertel 629: if ($constructtag) {
630: $result = &Apache::edit::rebuild_tag($token);
631: $result.=&Apache::edit::handle_insert();
632: }
633: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
634: $target eq 'tex' || $target eq 'analyze' ) {
1.120 albertel 635: if ($env{'request.state'} eq 'construct') {
1.73 albertel 636: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
637: my $default=&Apache::lonxml::get_param('default',$parstack,
638: $safeeval);
639: if ($name) {$Apache::inputtags::params{$name}=$default;}
640: }
1.52 albertel 641: }
1.73 albertel 642: return $result;
1.3 albertel 643: }
644:
645: sub end_responseparam {
1.73 albertel 646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
647: if ($target eq 'edit') { return ('','no'); }
648: return '';
1.55 albertel 649: }
650:
651: sub start_parameter {
1.114 albertel 652: return &start_responseparam(@_);
1.55 albertel 653: }
654:
655: sub end_parameter {
1.114 albertel 656: return &end_responseparam(@_);
1.42 albertel 657: }
658:
1.67 albertel 659: sub reset_params {
660: %Apache::inputtags::params=();
661: }
662:
1.42 albertel 663: sub setup_params {
1.94 albertel 664: my ($tag,$safeeval) = @_;
1.42 albertel 665:
1.120 albertel 666: if ($env{'request.state'} eq 'construct') { return; }
1.73 albertel 667: my %paramlist=();
668: foreach my $key (keys(%Apache::lonnet::packagetab)) {
669: if ($key =~ /^$tag/) {
670: my ($package,$name) = split(/&/,$key);
671: $paramlist{$name}=1;
672: }
1.42 albertel 673: }
1.73 albertel 674: foreach my $key (keys(%paramlist)) {
675: my $entry= 'resource.'.$Apache::inputtags::part;
676: if (defined($Apache::inputtags::response[-1])) {
677: $entry.='_'.$Apache::inputtags::response[-1];
678: }
679: $entry.='.'.$key;
680: &Apache::lonxml::debug("looking for $entry");
681: my $value = &Apache::lonnet::EXT("$entry");
682: &Apache::lonxml::debug("$key has value :$value:");
683: if ($value eq 'con_lost' || $value =~ /^error:/) {
684: &Apache::lonxml::debug("using nothing");
685: $Apache::inputtags::params{$key}='';
686: } else {
1.94 albertel 687: my $string="{return qq\0".$value."\0}";
688: my $newvalue=&Apache::run::run($string,$safeeval,1);
689: if (defined($newvalue)) { $value=$newvalue; }
1.73 albertel 690: $Apache::inputtags::params{$key}=$value;
691: }
1.42 albertel 692: }
1.48 albertel 693: }
694:
1.132 albertel 695: {
696: my @answer_bits;
1.147 albertel 697: my $need_row_start;
1.132 albertel 698:
1.48 albertel 699: sub answer_header {
1.147 albertel 700: my ($type,$increment,$rows) = @_;
1.73 albertel 701: my $result;
1.120 albertel 702: if ($env{'form.answer_output_mode'} eq 'tex') {
1.132 albertel 703: undef(@answer_bits);
1.133 albertel 704: my $bit;
705: if ($Apache::lonhomework::type eq 'exam') {
706: $bit = ($Apache::lonxml::counter+$increment).') ';
707: } else {
708: $bit .= ' Answer for Part: \verb|'.
709: $Apache::inputtags::part.'| ';
710: }
711: push(@answer_bits,$bit);
1.73 albertel 712: } else {
1.147 albertel 713: my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
1.132 albertel 714: $result = '<table border="1"><tr>';
715: if ($Apache::lonhomework::type eq 'exam') {
1.147 albertel 716: $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
1.132 albertel 717: } else {
1.147 albertel 718: $result .= $td.&mt('Answer for Part: [_1]',
719: $Apache::inputtags::part).'</td>';
1.132 albertel 720: }
721: $result .= "\n";
1.147 albertel 722: $need_row_start = 0;
723: }
724: return $result;
725: }
726:
727: sub next_answer {
728: my ($type) = @_;
729: my $result;
730: if ($env{'form.answer_output_mode'} eq 'tex') {
731: # FIXME ... need to do something with tex mode
732: } else {
733: $result .= "</tr>";
734: $need_row_start = 1;
1.73 albertel 735: }
736: return $result;
1.48 albertel 737: }
738:
739: sub answer_part {
1.148 albertel 740: my ($type,$answer,$args) = @_;
1.73 albertel 741: my $result;
1.120 albertel 742: if ($env{'form.answer_output_mode'} eq 'tex') {
1.148 albertel 743: if (!$args->{'no_verbatim'}) {
744: my $to_use='|';
745: foreach my $value (32..126) {
746: my $char=pack('c',$value);
747: if ($answer !~ /\Q$char\E/) {
748: $to_use=$char;
749: last;
750: }
751: }
752: if ($answer ne '') {
753: $answer = '\verb'.$to_use.$answer.$to_use;
1.124 albertel 754: }
755: }
1.132 albertel 756: if ($answer ne '') {
1.148 albertel 757: push(@answer_bits,$answer);
1.132 albertel 758: }
1.73 albertel 759: } else {
1.147 albertel 760: if ($need_row_start) {
761: $result .= '<tr>';
762: $need_row_start = 0;
763: }
764: $result .= '<td>'.$answer.'</td>';
1.73 albertel 765: }
766: return $result;
1.48 albertel 767: }
768:
769: sub answer_footer {
1.73 albertel 770: my ($type) = @_;
771: my $result;
1.120 albertel 772: if ($env{'form.answer_output_mode'} eq 'tex') {
1.133 albertel 773: my $columns = scalar(@answer_bits);
1.134 albertel 774: $result = ' \vskip 0 mm \noindent \begin{tabular}{|'.'c|'x$columns.'}\hline ';
1.133 albertel 775: $result .= join(' & ',@answer_bits);
1.132 albertel 776: $result .= ' \\\\ \\hline \end{tabular} \vskip 0 mm ';
1.73 albertel 777: } else {
1.80 albertel 778: $result = '</tr></table>';
1.73 albertel 779: }
780: return $result;
1.1 albertel 781: }
1.2 albertel 782:
1.132 albertel 783: }
784:
1.62 albertel 785: sub showallfoils {
1.120 albertel 786: if (defined($env{'form.showallfoils'})) {
1.149 albertel 787: my ($symb)=&Apache::lonnet::whichuser();
1.120 albertel 788: if (($env{'request.state'} eq 'construct') ||
789: ($env{'user.adv'} && $symb eq '') ||
1.118 foxr 790: ($Apache::lonhomework::viewgrades) ) {
1.102 albertel 791: return 1;
792: }
1.73 albertel 793: }
1.108 albertel 794: if ($Apache::lonhomework::type eq 'survey') { return 1; }
1.102 albertel 795: return 0;
1.70 albertel 796: }
797:
798: sub getresponse {
1.90 albertel 799: my ($temp,$resulttype)=@_;
1.70 albertel 800: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
801: my $response;
802: if (!defined($temp)) {
803: $temp=1;
804: } else {
805: $formparm.=":$temp";
806: }
807: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
808: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
809: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
810: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
1.120 albertel 811: if ($env{'form.submitted'} eq 'scantron') {
1.71 albertel 812: my $part = $Apache::inputtags::part;
813: my $id = $Apache::inputtags::response[-1];
1.120 albertel 814: $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
1.70 albertel 815: '.answer'};
1.71 albertel 816: # save bubbled letter for later
817: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
818: $response;
1.90 albertel 819: if ($resulttype ne 'letter') {
1.104 albertel 820: if ($resulttype eq 'A is 1') {
1.105 albertel 821: $response = $let_to_num{$response}+1;
822: } else {
1.104 albertel 823: $response = $let_to_num{$response};
824: }
1.90 albertel 825: }
1.70 albertel 826: } else {
1.120 albertel 827: $response = $env{$formparm};
1.70 albertel 828: }
829: return $response;
1.62 albertel 830: }
1.71 albertel 831:
832: sub repetition {
833: my $id = $Apache::inputtags::part;
834: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.121 albertel 835: if (!defined($weight) || ($weight eq '')) { $weight=1; }
1.125 albertel 836: my $repetition = int($weight/10);
837: if ($weight % 10 != 0) { $repetition++; }
1.72 albertel 838: return $repetition;
839: }
840:
841: sub scored_response {
842: my ($part,$id)=@_;
843: my $repetition=&repetition();
844: my $score=0;
845: for (my $i=0;$i<$repetition;$i++) {
1.125 albertel 846: # A is 1, B is 2, etc. (get response return 0-9 and then we add 1)
1.72 albertel 847: my $increase=&Apache::response::getresponse($i+1);
848: if ($increase ne '') { $score+=$increase+1; }
849: }
850: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
1.91 albertel 851: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
1.72 albertel 852: my $pcr=$score/$weight;
853: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
854: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
855: 'ASSIGNED_SCORE';
1.71 albertel 856: return $repetition;
1.78 albertel 857: }
858:
859: sub whichorder {
860: my ($max,$randomize,$showall,$hash)=@_;
861: #&Apache::lonxml::debug("man $max randomize $randomize");
862: if (!defined(@{ $$hash{'names'} })) { return; }
863: my @names = @{ $$hash{'names'} };
864: my @whichopt =();
865: my (%top,@toplist,%bottom,@bottomlist);
866: if (!($showall || ($randomize eq 'no'))) {
867: my $current=0;
868: foreach my $name (@names) {
869: $current++;
870: if ($$hash{"$name.location"} eq 'top') {
871: $top{$name}=$current;
872: } elsif ($$hash{"$name.location"} eq 'bottom') {
873: $bottom{$name}=$current;
874: }
875: }
876: }
877: my $topcount=0;
878: my $bottomcount=0;
879: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
880: && ($#names > -1)) {
881: #&Apache::lonxml::debug("Have $#whichopt max is $max");
882: my $aopt;
883: if ($showall || ($randomize eq 'no')) {
884: $aopt=0;
885: } else {
886: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
887: }
888: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
889: $aopt=splice(@names,$aopt,1);
890: #&Apache::lonxml::debug("Picked $aopt");
891: if ($top{$aopt}) {
892: $toplist[$top{$aopt}]=$aopt;
893: $topcount++;
894: } elsif ($bottom{$aopt}) {
895: $bottomlist[$bottom{$aopt}]=$aopt;
896: $bottomcount++;
897: } else {
898: push (@whichopt,$aopt);
899: }
900: }
901: for (my $i=0;$i<=$#toplist;$i++) {
902: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
903: }
904: for (my $i=0;$i<=$#bottomlist;$i++) {
905: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
906: }
907: return @whichopt;
1.71 albertel 908: }
909:
1.85 albertel 910: sub show_answer {
911: my $part = $Apache::inputtags::part;
912: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
913: my $status = $Apache::inputtags::status[-1];
914: return ( ($award =~ /^correct/
915: && lc($Apache::lonhomework::problemstatus) ne 'no')
916: || $status eq "SHOW_ANSWER");
917: }
1.87 albertel 918:
919: sub analyze_store_foilgroup {
920: my ($shown,$attrs)=@_;
921: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
922: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
923: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
924: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
925: foreach my $attr (@$attrs) {
926: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
927: $Apache::response::foilgroup{"$name.".$attr};
928: }
929: }
930: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
1.96 albertel 931: }
932:
933: sub check_if_computed {
934: my ($token,$parstack,$safeeval,$name)=@_;
935: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
1.106 matthew 936: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
1.96 albertel 937: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
938: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
939: }
1.87 albertel 940: }
941:
942: sub pick_foil_for_concept {
943: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
944: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
945: my @names = @{ $Apache::response::conceptgroup{'names'} };
946: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
947: my $name=$names[$pick];
948: push @{ $Apache::response::foilgroup{'names'} }, $name;
949: foreach my $attr (@$attrs) {
950: $Apache::response::foilgroup{"$name.".$attr} =
951: $Apache::response::conceptgroup{"$name.".$attr};
952: }
953: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
954: $Apache::response::foilgroup{"$name.concept"} = $concept;
955: &Apache::lonxml::debug("Selecting $name in $concept");
956: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
957: if ($target eq 'analyze') {
958: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
959: $concept);
960: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
961: $Apache::response::conceptgroup{'names'};
962: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
963: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
964: $name);
965: foreach my $attr (@$attrs) {
966: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
967: $Apache::response::conceptgroup{"$name.$attr"};
968: }
969: }
970: }
971: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
972: $hinthash->{"$part_id.concept.$concept"}=
973: $Apache::response::conceptgroup{'names'};
974:
975: }
976:
1.95 albertel 977: sub get_response_param {
978: my ($id,$name,$default)=@_;
979: my $parameter;
1.120 albertel 980: if ($env{'request.state'} eq 'construct' &&
1.95 albertel 981: defined($Apache::inputtags::params{$name})) {
982: $parameter=$Apache::inputtags::params{$name};
983: } else {
984: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
985: }
986: if (!defined($parameter) || $parameter eq '') {
987: $parameter = $default;
988: }
989: return $parameter;
990: }
1.87 albertel 991:
1.113 albertel 992: sub submitted {
993: my ($who)=@_;
994:
995: # when scatron grading any submission is a submission
1.120 albertel 996: if ($env{'form.submitted'} eq 'scantron') { return 1; }
1.113 albertel 997: # if the caller only cared if this was a scantron submission
998: if ($who eq 'scantron') { return 0; }
999: # if the Submit Answer button for this particular part was pressed
1000: my $partid=$Apache::inputtags::part;
1.120 albertel 1001: if (defined($env{'form.submit_'.$partid})) { return 1; }
1.122 albertel 1002: # Submit All button on a .page was pressed
1003: if (defined($env{'form.all_submit'})) { return 1; }
1.113 albertel 1004: # otherwise no submission occured
1005: return 0;
1006: }
1.117 albertel 1007:
1.130 albertel 1008: sub add_to_gradingqueue {
1.149 albertel 1009: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.131 albertel 1010: if ( $courseid eq ''
1011: || $symb eq ''
1.135 albertel 1012: || $env{'request.state'} eq 'construct'
1013: || $Apache::lonhomework::type ne 'problem') {
1.131 albertel 1014: return;
1015: }
1.130 albertel 1016:
1017: my %queue_info = ( 'type' => 'problem',
1018: 'time' => time);
1019:
1020: if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
1021: $queue_info{'slot'}=
1022: $Apache::lonhomework::history{"resource.0.checkedin.slot"};
1023: }
1024:
1025: my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
1026: if ($result ne 'ok') {
1027: &Apache::lonxml::error("add_to_queue said $result");
1028: }
1029: }
1030:
1.117 albertel 1031: # basically undef and 0 (both false) mean that they still have work to do
1032: # and all true values mean that they can't do any more work
1033: #
1034: # a return of undef means it is unattempted
1035: # a return of 0 means it is attmpted and wrong but still has tries
1036: # a return of 1 means it is marked correct
1037: # a return of 2 means they have exceed maximum number of tries
1038: # a return of 3 means it after the answer date
1039: sub check_status {
1040: my ($id)=@_;
1.143 albertel 1041: if (!defined($id)) { $id=$Apache::inputtags::part; }
1.117 albertel 1042: my $curtime=&Apache::lonnet::EXT('system.time');
1043: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
1044: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
1045: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
1046: if ( $opendate && $curtime > $opendate &&
1047: $duedate && $curtime > $duedate &&
1048: $answerdate && $curtime > $answerdate) {
1049: return 3;
1050: }
1051: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
1052: if ($status =~ /^correct/) { return 1; }
1053: if (!$status) { return undef; }
1054: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
1055: if ($maxtries eq '') { $maxtries=2; }
1056: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
1057: if ($curtries < $maxtries) { return 0; }
1058: return 2;
1059: }
1060:
1.1 albertel 1061: 1;
1062: __END__
1.38 albertel 1063:
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