Annotation of loncom/homework/response.pm, revision 1.148
1.38 albertel 1: # The LearningOnline Network with CAPA
1.1 albertel 2: # various response type definitons response definition
1.53 albertel 3: #
1.148 ! albertel 4: # $Id: response.pm,v 1.147 2006/10/12 17:16:53 albertel 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;
1.1 albertel 33:
1.57 harris41 34: BEGIN {
1.139 www 35: &Apache::lonxml::register('Apache::response',('responseparam','parameter','dataresponse','customresponse','mathresponse'));
1.1 albertel 36: }
37:
1.13 albertel 38: sub start_response {
1.73 albertel 39: my ($parstack,$safeeval)=@_;
1.136 albertel 40: my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.73 albertel 41: if ($#Apache::inputtags::import > -1) {
42: &Apache::lonxml::debug("Turning :$id: into");
43: $id = join('_',@Apache::inputtags::import).'_'.$id;
44: &Apache::lonxml::debug("New :$id:");
45: }
46: push (@Apache::inputtags::response,$id);
47: push (@Apache::inputtags::responselist,$id);
48: @Apache::inputtags::inputlist=();
1.101 albertel 49: if ($Apache::inputtags::part eq '' &&
50: !$Apache::lonhomework::ignore_response_errors) {
1.97 albertel 51: &Apache::lonxml::error(&HTML::Entities::encode(&mt("Found a <*response> outside of a <part> in a <part>ed problem"),'<>&"'));
1.92 albertel 52: }
53: if ($Apache::inputtags::response_with_no_part &&
54: $Apache::inputtags::part ne '0') {
1.97 albertel 55: &Apache::lonxml::error(&HTML::Entities::encode(&mt("<*response>s are both inside of <part> and outside of <part>, this is not a valid problem, errors in grading may occur."),'<>&"').'<br />');
1.92 albertel 56: }
57: if ($Apache::inputtags::part eq '0') {
58: $Apache::inputtags::response_with_no_part=1;
59: }
1.73 albertel 60: return $id;
1.13 albertel 61: }
62:
63: sub end_response {
1.79 albertel 64: #pop @Apache::inputtags::response;
1.73 albertel 65: @Apache::inputtags::inputlist=();
66: return '';
1.13 albertel 67: }
68:
1.41 albertel 69: sub start_hintresponse {
1.73 albertel 70: my ($parstack,$safeeval)=@_;
1.136 albertel 71: my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.123 albertel 72: push (@Apache::inputtags::hint,$id);
73: push (@Apache::inputtags::hintlist,$id);
1.73 albertel 74: push (@Apache::inputtags::paramstack,[%Apache::inputtags::params]);
75: return $id;
1.41 albertel 76: }
77:
78: sub end_hintresponse {
1.123 albertel 79: pop @Apache::inputtags::hint;
1.73 albertel 80: if (defined($Apache::inputtags::paramstack[-1])) {
81: %Apache::inputtags::params=
82: @{ pop(@Apache::inputtags::paramstack) };
83: }
84: return '';
1.41 albertel 85: }
86:
1.99 albertel 87: my @randomseeds;
88: sub pushrandomnumber {
89: my $rand_alg=&Apache::lonnet::get_rand_alg();
90: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
91: $rand_alg eq '64bit2') {
92: # do nothing
93: } else {
94: my @seed=&Math::Random::random_get_seed();
1.127 albertel 95: push(@randomseeds,\@seed);
1.99 albertel 96: }
1.127 albertel 97: &Apache::response::setrandomnumber(@_);
1.99 albertel 98: }
99: sub poprandomnumber {
100: my $rand_alg=&Apache::lonnet::get_rand_alg();
101: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
102: $rand_alg eq '64bit2') {
103: return;
104: }
105: my $seed=pop(@randomseeds);
106: if ($seed) {
107: &Math::Random::random_set_seed(@$seed);
108: } else {
109: &Apache::lonxml::error("Unable to restore random algorithm.");
110: }
111: }
1.117 albertel 112:
1.26 albertel 113: sub setrandomnumber {
1.127 albertel 114: my ($ignore_id2) = @_;
1.73 albertel 115: my $rndseed;
1.88 albertel 116: $rndseed=&Apache::structuretags::setup_rndseed();
117: if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
1.73 albertel 118: &Apache::lonxml::debug("randseed $rndseed");
119: # $rndseed=unpack("%32i",$rndseed);
1.99 albertel 120: my $rand_alg=&Apache::lonnet::get_rand_alg();
1.126 albertel 121: my ($rndmod,$rndmod2);
1.119 albertel 122:
123: my ($id1,$id2,$shift_amt);
124: if ($Apache::lonhomework::parsing_a_problem) {
125: $id1=$Apache::inputtags::part;
126: if (defined($Apache::inputtags::response[-1])) {
127: $id2=$Apache::inputtags::response[-1];
128: }
129: $shift_amt=scalar(@Apache::inputtags::responselist);
130: } elsif ($Apache::lonhomework::parsing_a_task) {
1.141 albertel 131: $id1=&Apache::bridgetask::get_dim_id();
132: if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
133: $id2=$Apache::bridgetask::instance{$id1}[-1];
1.142 albertel 134: $shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
135: } else {
136: $shift_amt=0;
1.119 albertel 137: }
138: }
139: &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
1.99 albertel 140: if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
141: $rand_alg eq '64bit2') {
1.119 albertel 142: $rndmod=(&Apache::lonnet::numval($id1) << 10);
143: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval($id2); }
1.110 albertel 144: } elsif ($rand_alg eq '64bit3') {
1.119 albertel 145: $rndmod=(&Apache::lonnet::numval2($id1) << 10);
146: if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
1.126 albertel 147: } elsif ($rand_alg eq '64bit4') {
1.119 albertel 148: my $shift=(4*$shift_amt)%30;
149: $rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
150: if (defined($id2)) {
151: $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
1.110 albertel 152: }
1.126 albertel 153: } else {
154: ($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
1.99 albertel 155: }
1.127 albertel 156:
1.99 albertel 157: if ($rndseed =~/([,:])/) {
158: my $char=$1;
159: use integer;
160: my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
161: $num1+=$rndmod;
1.126 albertel 162: $num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
1.109 albertel 163: if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
1.99 albertel 164: $rndseed=$num1.$char.$num2;
165: } else {
1.74 albertel 166: $rndseed+=$rndmod;
1.109 albertel 167: if($Apache::lonnet::_64bit) {
168: use integer;
169: $rndseed=(($rndseed<<32)>>32);
170: }
1.74 albertel 171: }
1.111 albertel 172: &Apache::lonxml::debug("randseed $rndmod $rndseed");
1.74 albertel 173: &Apache::lonnet::setup_random_from_rndseed($rndseed);
1.73 albertel 174: return '';
1.26 albertel 175: }
176:
1.7 www 177: sub meta_parameter_write {
1.38 albertel 178: my ($name,$type,$default,$display)=@_;
1.41 albertel 179: my $partref=$Apache::inputtags::part;
180: my $result='<parameter part="'.$Apache::inputtags::part.'"';
181: if (defined($Apache::inputtags::response[-1])) {
1.73 albertel 182: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
183: $partref.='_'.$Apache::inputtags::response[-1];
1.41 albertel 184: }
185: $result.= ' name="'.$name.'"'.
186: ' type="'.$type.'"'.
1.89 albertel 187: (defined($default)?' default="'.$default.'"':'').
188: (defined($display)?' display="'.$display.' [Part: '.$partref.']"':'')
1.41 albertel 189: .'></parameter>'
190: ."\n";
191: return $result;
1.33 www 192: }
193:
194: sub meta_package_write {
195: my $name=shift;
1.41 albertel 196: my $result = '<parameter part="'.$Apache::inputtags::part.'"';
197: if(defined($Apache::inputtags::response[-1])) {
1.73 albertel 198: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
1.41 albertel 199: }
200: $result.=' package="'.$name.'"></parameter>'."\n";
201: return $result;
1.7 www 202: }
203:
204: sub meta_stores_write {
1.10 www 205: my ($name,$type,$display)=@_;
1.41 albertel 206: my $partref=$Apache::inputtags::part;
207: my $result = '<stores part="'.$Apache::inputtags::part.'"';
208: if (defined($Apache::inputtags::response[-1])) {
1.73 albertel 209: $result.= ' id="'.$Apache::inputtags::response[-1].'"';
210: $partref.='_'.$Apache::inputtags::response[-1];
1.41 albertel 211: }
212: $result.= ' name="'.$name.'"'.
213: ' type="'.$type.'"'.
214: ' display="'.$display.' [Part: '.$partref.']"'.
215: "></stores>\n";
1.7 www 216: }
217:
218: sub mandatory_part_meta {
219: #
220: # Autogenerate metadata for mandatory
221: # input (from RAT or lonparmset) and
222: # output (to lonspreadsheet)
223: # of each part
224: #
1.73 albertel 225: return
1.34 www 226: # &meta_parameter_write('opendate','date_start','',
227: # 'Opening Date').
228: # &meta_parameter_write('duedate','date_end','',
229: # 'Due Date').
230: # &meta_parameter_write('answerdate','date_start','',
231: # 'Show Answer Date').
232: # &meta_parameter_write('weight','int_zeropos','',
233: # 'Available Points').
234: # &meta_parameter_write('maxtries','int_pos','',
235: # 'Maximum Number of Tries').
1.73 albertel 236: &meta_package_write('part').
237: &meta_stores_write('solved','string',
238: 'Problem Status').
239: &meta_stores_write('tries','int_zeropos',
240: 'Number of Attempts').
241: &meta_stores_write('awarded','float',
242: 'Partial Credit Factor');
1.7 www 243: #
244: # Note: responseid-specific data 'submission' and 'awarddetail'
245: # not available to spreadsheet -> skip here
246: #
1.86 albertel 247: }
248:
249: sub meta_part_order {
250: if (@Apache::inputtags::partlist) {
251: my @parts=@Apache::inputtags::partlist;
252: shift(@parts);
1.100 albertel 253: return '<partorder>'.join(',',@parts).'</partorder>'."\n";
1.86 albertel 254: } else {
1.100 albertel 255: return '<partorder>0</partorder>'."\n";
256: }
257: }
258:
259: sub meta_response_order {
260: if (@Apache::inputtags::responselist) {
261: return '<responseorder>'.join(',',@Apache::inputtags::responselist).
262: '</responseorder>'."\n";
1.86 albertel 263: }
1.14 albertel 264: }
265:
1.15 albertel 266: sub check_for_previous {
1.73 albertel 267: my ($curresponse,$partid,$id) = @_;
268: my %previous;
269: $previous{'used'} = 0;
270: foreach my $key (sort(keys(%Apache::lonhomework::history))) {
1.98 albertel 271: if ($key =~ /resource\.$partid\.$id\.submission$/) {
1.73 albertel 272: &Apache::lonxml::debug("Trying $key");
273: my $pastresponse=$Apache::lonhomework::history{$key};
274: if ($pastresponse eq $curresponse) {
275: $previous{'used'} = 1;
276: my $history;
277: if ( $key =~ /^(\d+):/ ) {
278: $history=$1;
279: $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
280: $previous{'last'}='0';
281: push(@{ $previous{'version'} },$history);
282: } else {
283: $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
284: $previous{'last'}='1';
285: }
286: if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN'; }
287: &Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
288: }
1.32 albertel 289: }
1.73 albertel 290: }
291: &Apache::lonhomework::showhash(%previous);
292: return %previous;
1.54 albertel 293: }
294:
295: sub handle_previous {
1.73 albertel 296: my ($previous,$ad)=@_;
297: if ($$previous{'used'} && ($$previous{'award'} eq $ad) ) {
298: if ($$previous{'last'}) {
299: push(@Apache::inputtags::previous,'PREVIOUSLY_LAST');
1.107 albertel 300: push(@Apache::inputtags::previous_version,$$previous{'version'});
301: } elsif ($Apache::lonhomework::type ne 'survey') {
1.73 albertel 302: push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
1.107 albertel 303: push(@Apache::inputtags::previous_version,$$previous{'version'});
1.73 albertel 304: }
1.54 albertel 305: }
1.44 albertel 306: }
307:
1.45 albertel 308: sub view_or_modify {
1.73 albertel 309: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
310: my $myself=0;
1.120 albertel 311: if ( ($name eq $env{'user.name'}) && ($domain eq $env{'user.domain'}) ) {
1.73 albertel 312: $myself=1;
313: }
314: my $vgr=&Apache::lonnet::allowed('vgr',$courseid);
315: my $mgr=&Apache::lonnet::allowed('vgr',$courseid);
316: if ($mgr) { return "M"; }
317: if ($vgr) { return "V"; }
318: if ($myself) { return "V"; }
319: return '';
1.45 albertel 320: }
321:
1.44 albertel 322: sub start_dataresponse {
1.73 albertel 323: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
324: my $id = &Apache::response::start_response($parstack,$safeeval);
325: my $result;
326: if ($target eq 'web') {
327: $result = $token->[2]->{'display'}.':';
328: } elsif ($target eq 'meta') {
329: $result = &Apache::response::meta_stores_write($token->[2]->{'name'},
330: $token->[2]->{'type'},
331: $token->[2]->{'display'});
332: $result .= &Apache::response::meta_package_write('dataresponse');
333: }
334: return $result;
1.44 albertel 335: }
336:
337: sub end_dataresponse {
1.73 albertel 338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
339: my $result;
340: if ( $target eq 'web' ) {
341: } elsif ($target eq 'grade' ) {
1.120 albertel 342: if ( defined $env{'form.submitted'}) {
1.73 albertel 343: my ($symb,$courseid,$domain,$name)=&Apache::lonxml::whichuser();
344: my $allowed=&Apache::lonnet::allowed('mgr',$courseid);
345: if ($allowed) {
1.94 albertel 346: &Apache::response::setup_params('dataresponse',$safeeval);
1.73 albertel 347: my $partid = $Apache::inputtags::part;
348: my $id = $Apache::inputtags::response['-1'];
1.120 albertel 349: my $response = $env{'form.HWVAL_'.$id};
1.73 albertel 350: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
351: if ( $response =~ /[^\s]/) {
352: $Apache::lonhomework::results{"resource.$partid.$id.$name"}=$response;
353: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
354: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='SUBMITTED';
355: }
356: } else {
357: $result='Not Permitted to change values.'
358: }
1.45 albertel 359: }
1.73 albertel 360: }
361: &Apache::response::end_response;
362: return $result;
1.3 albertel 363: }
364:
1.129 albertel 365: sub start_customresponse {
1.128 albertel 366: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
367: my $id = &Apache::response::start_response($parstack,$safeeval);
1.129 albertel 368: push(@Apache::lonxml::namespace,'customresponse');
1.128 albertel 369: my $result;
1.129 albertel 370: undef($Apache::response::custom_answer);
1.128 albertel 371: &Apache::lonxml::register('Apache::response',('answer'));
372: if ($target eq 'web') {
373: if ( &Apache::response::show_answer() ) {
374: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
375: $safeeval);
376: $Apache::inputtags::answertxt{$id}=$answer;
377: }
378: } elsif ($target eq 'edit') {
379: $result.=&Apache::edit::tag_start($target,$token);
380: $result.=&Apache::edit::text_arg('String to display for answer:',
1.145 albertel 381: 'answerdisplay',$token);
1.128 albertel 382: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
383: } elsif ($target eq 'modified') {
384: my $constructtag;
385: $constructtag=&Apache::edit::get_new_args($token,$parstack,
386: $safeeval,'answerdisplay');
387: if ($constructtag) {
388: $result = &Apache::edit::rebuild_tag($token);
389: $result.=&Apache::edit::handle_insert();
390: }
391: } elsif ($target eq 'answer' || $target eq 'grade') {
392: &Apache::response::reset_params();
393: } elsif ($target eq 'meta') {
1.129 albertel 394: $result .= &Apache::response::meta_package_write('customresponse');
1.128 albertel 395: }
396: return $result;
397: }
398:
1.129 albertel 399: sub end_customresponse {
1.128 albertel 400: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
401: my $result;
402: my $part=$Apache::inputtags::part;
403: my $id=$Apache::inputtags::response[-1];
404: if ( $target eq 'grade' && &Apache::response::submitted() ) {
405: my $response = &Apache::response::getresponse();
1.146 albertel 406: if ($Apache::lonhomework::type eq 'exam' ||
407: &Apache::response::submitted('scantron')) {
408: &Apache::response::scored_response($part,$id);
409: } elsif ( $response =~ /[^\s]/ &&
410: $Apache::response::custom_answer_type eq 'loncapa/perl') {
1.128 albertel 411: if (!$Apache::lonxml::default_homework_loaded) {
412: &Apache::lonxml::default_homework_load($safeeval);
413: }
414: my %previous = &Apache::response::check_for_previous($response,
415: $part,$id);
416: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
417: $response;
418: my $error;
1.129 albertel 419: ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
1.128 albertel 420: $response;
421:
1.129 albertel 422: my $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer.'}',$safeeval);
1.128 albertel 423: if (!&Apache::inputtags::valid_award($award)) {
424: $error = $award;
425: $award = 'ERROR';
426: }
427: &Apache::response::handle_previous(\%previous,$award);
428: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
429: $award;
430: if ($error) {
431: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
432: $error;
433: }
434: }
1.146 albertel 435: } elsif ( $target eq 'answer') {
436: $result = &Apache::response::answer_header('customresponse');
437: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
438: $safeeval);
439: if ($env{'form.answer_output_mode'} ne 'tex') {
440: $answer = '<b>'.$answer.'</b>';
441: }
442: $result .= &Apache::response::answer_part('customresponse',$answer);
443: $result .= &Apache::response::answer_footer('customresponse');
444: }
445: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
446: $target eq 'tex' || $target eq 'analyze') {
447: &Apache::lonxml::increment_counter(&Apache::response::repetition());
1.128 albertel 448: }
449: pop(@Apache::lonxml::namespace);
450: &Apache::lonxml::deregister('Apache::response',('answer'));
451: &Apache::response::end_response();
452: return $result;
453: }
454:
1.140 www 455:
1.139 www 456: sub start_mathresponse {
1.140 www 457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
458: my $id = &Apache::response::start_response($parstack,$safeeval);
459: push(@Apache::lonxml::namespace,'mathresponse');
1.139 www 460: my $result;
1.140 www 461: undef($Apache::response::custom_answer);
462: &Apache::lonxml::register('Apache::response',('answer'));
463: if ($target eq 'web') {
464: if ( &Apache::response::show_answer() ) {
465: my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
466: $safeeval);
467: $Apache::inputtags::answertxt{$id}=$answer;
468: }
469: } elsif ($target eq 'edit') {
470: $result.=&Apache::edit::tag_start($target,$token);
471: $result.=&Apache::edit::text_arg('String to display for answer:',
472: 'answerdisplay',$token);
473: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
474: } elsif ($target eq 'modified') {
475: my $constructtag;
476: $constructtag=&Apache::edit::get_new_args($token,$parstack,
477: $safeeval,'answerdisplay');
478: if ($constructtag) {
479: $result = &Apache::edit::rebuild_tag($token);
480: $result.=&Apache::edit::handle_insert();
481: }
482: } elsif ($target eq 'answer' || $target eq 'grade') {
483: &Apache::response::reset_params();
484: } elsif ($target eq 'meta') {
485: $result .= &Apache::response::meta_package_write('mathresponse');
1.139 www 486: }
487: return $result;
488: }
489:
490: sub end_mathresponse {
1.140 www 491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
492: my $result;
493: my $part=$Apache::inputtags::part;
494: my $id=$Apache::inputtags::response[-1];
495: if ( $target eq 'grade' && &Apache::response::submitted() ) {
496: my $response = &Apache::response::getresponse();
497: if ( $response =~ /[^\s]/ &&
498: $Apache::response::custom_answer_type eq 'loncapa/perl') {
499: if (!$Apache::lonxml::default_homework_loaded) {
500: &Apache::lonxml::default_homework_load($safeeval);
501: }
502: my %previous = &Apache::response::check_for_previous($response,
503: $part,$id);
504: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
505: $response;
506: my $error;
507: ${$safeeval->varglob('LONCAPA::mathresponse_submission')}=
508: $response;
509:
510: my $award = &Apache::run::run('{ my $submission=$LONCAPA::mathresponse_submission;'.$Apache::response::custom_answer.'}',$safeeval);
511: if (!&Apache::inputtags::valid_award($award)) {
512: $error = $award;
513: $award = 'ERROR';
514: }
515: &Apache::response::handle_previous(\%previous,$award);
516: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
517: $award;
518: if ($error) {
519: $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
520: $error;
521: }
522: }
523: }
524: pop(@Apache::lonxml::namespace);
525: &Apache::lonxml::deregister('Apache::response',('answer'));
526: &Apache::response::end_response();
527: return $result;
1.139 www 528: }
529:
1.140 www 530:
1.128 albertel 531: sub start_answer {
532: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
533: my $result;
1.129 albertel 534: $Apache::response::custom_answer=
1.128 albertel 535: &Apache::lonxml::get_all_text_unbalanced("/answer",$parser);
1.129 albertel 536: $Apache::response::custom_answer_type=
1.128 albertel 537: lc(&Apache::lonxml::get_param('type',$parstack,$safeeval));
1.129 albertel 538: $Apache::response::custom_answer_type =~ s/\s+//g;
1.128 albertel 539: if ($target eq "edit" ) {
540: $result=&Apache::edit::tag_start($target,$token,'Answer algorithm');
541: $result.=&Apache::edit::editfield($token->[1],
1.129 albertel 542: $Apache::response::custom_answer,
1.128 albertel 543: '',80,4);
544: } elsif ( $target eq "modified" ) {
545: $result=$token->[4].&Apache::edit::modifiedfield('/answer',$parser);
546: }
547: return $result;
548: }
549:
550: sub end_answer {
551: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
552: if ($target eq 'edit' ) {
553: return &Apache::edit::end_table();
554: }
555: }
556:
1.83 albertel 557: sub decide_package {
558: my ($tagstack)=@_;
559: my $package;
560: if ($$tagstack[-1] eq 'parameter') {
561: $package='part';
562: } else {
563: my $i=-1;
564: while (defined($$tagstack[$i])) {
565: if ($$tagstack[$i] =~ /(response|hint)$/) {
566: $package=$$tagstack[$i];
567: last;
568: }
569: $i--;
570: }
571: }
572: return $package;
573: }
574:
1.3 albertel 575: sub start_responseparam {
1.73 albertel 576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
577: my $result='';
578: if ($target eq 'meta') {
579: $result = &meta_parameter_write($token->[2]->{'name'},
580: $token->[2]->{'type'},
581: $token->[2]->{'default'},
582: $token->[2]->{'description'});
583: } elsif ($target eq 'edit') {
584: $result.=&Apache::edit::tag_start($target,$token);
1.83 albertel 585: my $optionlist;
586: my $package=&decide_package($tagstack);
587: foreach my $key (sort(keys(%Apache::lonnet::packagetab))) {
588: if ($key =~ /^\Q$package\E&(.*)&display$/) {
589: $optionlist.='<option value="'.$1.'">'.
590: $Apache::lonnet::packagetab{$key}.'</option>';
591: }
592: }
593: if (defined($optionlist)) {
594: $result.='Use template: <select name="'.
595: &Apache::edit::html_element_name('parameter_package').'">'.
596: '<option value=""></option>'.$optionlist.'</select><br />';
597: }
1.73 albertel 598: $result.=&Apache::edit::text_arg('Name:','name',$token).
599: &Apache::edit::text_arg('Type:','type',$token).
600: &Apache::edit::text_arg('Description:','description',$token).
601: &Apache::edit::text_arg('Default:','default',$token).
602: "</td></tr>";
603: $result.=&Apache::edit::end_table;
604: } elsif ($target eq 'modified') {
1.83 albertel 605: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
606: $safeeval,'name','type',
607: 'description','default');
608: my $element=&Apache::edit::html_element_name('parameter_package');
1.120 albertel 609: if (defined($env{"form.$element"}) && $env{"form.$element"} ne '') {
610: my $name=$env{"form.$element"};
1.83 albertel 611: my $tag=&decide_package($tagstack);
612: $token->[2]->{'name'}=$name;
613: $token->[2]->{'type'}=
614: $Apache::lonnet::packagetab{"$tag&$name&type"};
615: $token->[2]->{'description'}=
616: $Apache::lonnet::packagetab{"$tag&$name&display"};
617: $token->[2]->{'default'}=
618: $Apache::lonnet::packagetab{"$tag&$name&default"};
619: $constructtag=1;
620: }
1.73 albertel 621: if ($constructtag) {
622: $result = &Apache::edit::rebuild_tag($token);
623: $result.=&Apache::edit::handle_insert();
624: }
625: } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
626: $target eq 'tex' || $target eq 'analyze' ) {
1.120 albertel 627: if ($env{'request.state'} eq 'construct') {
1.73 albertel 628: my $name =&Apache::lonxml::get_param('name',$parstack,$safeeval);
629: my $default=&Apache::lonxml::get_param('default',$parstack,
630: $safeeval);
631: if ($name) {$Apache::inputtags::params{$name}=$default;}
632: }
1.52 albertel 633: }
1.73 albertel 634: return $result;
1.3 albertel 635: }
636:
637: sub end_responseparam {
1.73 albertel 638: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
639: if ($target eq 'edit') { return ('','no'); }
640: return '';
1.55 albertel 641: }
642:
643: sub start_parameter {
1.114 albertel 644: return &start_responseparam(@_);
1.55 albertel 645: }
646:
647: sub end_parameter {
1.114 albertel 648: return &end_responseparam(@_);
1.42 albertel 649: }
650:
1.67 albertel 651: sub reset_params {
652: %Apache::inputtags::params=();
653: }
654:
1.42 albertel 655: sub setup_params {
1.94 albertel 656: my ($tag,$safeeval) = @_;
1.42 albertel 657:
1.120 albertel 658: if ($env{'request.state'} eq 'construct') { return; }
1.73 albertel 659: my %paramlist=();
660: foreach my $key (keys(%Apache::lonnet::packagetab)) {
661: if ($key =~ /^$tag/) {
662: my ($package,$name) = split(/&/,$key);
663: $paramlist{$name}=1;
664: }
1.42 albertel 665: }
1.73 albertel 666: foreach my $key (keys(%paramlist)) {
667: my $entry= 'resource.'.$Apache::inputtags::part;
668: if (defined($Apache::inputtags::response[-1])) {
669: $entry.='_'.$Apache::inputtags::response[-1];
670: }
671: $entry.='.'.$key;
672: &Apache::lonxml::debug("looking for $entry");
673: my $value = &Apache::lonnet::EXT("$entry");
674: &Apache::lonxml::debug("$key has value :$value:");
675: if ($value eq 'con_lost' || $value =~ /^error:/) {
676: &Apache::lonxml::debug("using nothing");
677: $Apache::inputtags::params{$key}='';
678: } else {
1.94 albertel 679: my $string="{return qq\0".$value."\0}";
680: my $newvalue=&Apache::run::run($string,$safeeval,1);
681: if (defined($newvalue)) { $value=$newvalue; }
1.73 albertel 682: $Apache::inputtags::params{$key}=$value;
683: }
1.42 albertel 684: }
1.48 albertel 685: }
686:
1.132 albertel 687: {
688: my @answer_bits;
1.147 albertel 689: my $need_row_start;
1.132 albertel 690:
1.48 albertel 691: sub answer_header {
1.147 albertel 692: my ($type,$increment,$rows) = @_;
1.73 albertel 693: my $result;
1.120 albertel 694: if ($env{'form.answer_output_mode'} eq 'tex') {
1.132 albertel 695: undef(@answer_bits);
1.133 albertel 696: my $bit;
697: if ($Apache::lonhomework::type eq 'exam') {
698: $bit = ($Apache::lonxml::counter+$increment).') ';
699: } else {
700: $bit .= ' Answer for Part: \verb|'.
701: $Apache::inputtags::part.'| ';
702: }
703: push(@answer_bits,$bit);
1.73 albertel 704: } else {
1.147 albertel 705: my $td = '<td '.(defined($rows)?'rowspan="'.$rows.'"':'').'>';
1.132 albertel 706: $result = '<table border="1"><tr>';
707: if ($Apache::lonhomework::type eq 'exam') {
1.147 albertel 708: $result .= $td.($Apache::lonxml::counter+$increment). ')</td>';
1.132 albertel 709: } else {
1.147 albertel 710: $result .= $td.&mt('Answer for Part: [_1]',
711: $Apache::inputtags::part).'</td>';
1.132 albertel 712: }
713: $result .= "\n";
1.147 albertel 714: $need_row_start = 0;
715: }
716: return $result;
717: }
718:
719: sub next_answer {
720: my ($type) = @_;
721: my $result;
722: if ($env{'form.answer_output_mode'} eq 'tex') {
723: # FIXME ... need to do something with tex mode
724: } else {
725: $result .= "</tr>";
726: $need_row_start = 1;
1.73 albertel 727: }
728: return $result;
1.48 albertel 729: }
730:
731: sub answer_part {
1.148 ! albertel 732: my ($type,$answer,$args) = @_;
1.73 albertel 733: my $result;
1.120 albertel 734: if ($env{'form.answer_output_mode'} eq 'tex') {
1.148 ! albertel 735: if (!$args->{'no_verbatim'}) {
! 736: my $to_use='|';
! 737: foreach my $value (32..126) {
! 738: my $char=pack('c',$value);
! 739: if ($answer !~ /\Q$char\E/) {
! 740: $to_use=$char;
! 741: last;
! 742: }
! 743: }
! 744: if ($answer ne '') {
! 745: $answer = '\verb'.$to_use.$answer.$to_use;
1.124 albertel 746: }
747: }
1.132 albertel 748: if ($answer ne '') {
1.148 ! albertel 749: push(@answer_bits,$answer);
1.132 albertel 750: }
1.73 albertel 751: } else {
1.147 albertel 752: if ($need_row_start) {
753: $result .= '<tr>';
754: $need_row_start = 0;
755: }
756: $result .= '<td>'.$answer.'</td>';
1.73 albertel 757: }
758: return $result;
1.48 albertel 759: }
760:
761: sub answer_footer {
1.73 albertel 762: my ($type) = @_;
763: my $result;
1.120 albertel 764: if ($env{'form.answer_output_mode'} eq 'tex') {
1.133 albertel 765: my $columns = scalar(@answer_bits);
1.134 albertel 766: $result = ' \vskip 0 mm \noindent \begin{tabular}{|'.'c|'x$columns.'}\hline ';
1.133 albertel 767: $result .= join(' & ',@answer_bits);
1.132 albertel 768: $result .= ' \\\\ \\hline \end{tabular} \vskip 0 mm ';
1.73 albertel 769: } else {
1.80 albertel 770: $result = '</tr></table>';
1.73 albertel 771: }
772: return $result;
1.1 albertel 773: }
1.2 albertel 774:
1.132 albertel 775: }
776:
1.62 albertel 777: sub showallfoils {
1.120 albertel 778: if (defined($env{'form.showallfoils'})) {
1.102 albertel 779: my ($symb)=&Apache::lonxml::whichuser();
1.120 albertel 780: if (($env{'request.state'} eq 'construct') ||
781: ($env{'user.adv'} && $symb eq '') ||
1.118 foxr 782: ($Apache::lonhomework::viewgrades) ) {
1.102 albertel 783: return 1;
784: }
1.73 albertel 785: }
1.108 albertel 786: if ($Apache::lonhomework::type eq 'survey') { return 1; }
1.102 albertel 787: return 0;
1.70 albertel 788: }
789:
790: sub getresponse {
1.90 albertel 791: my ($temp,$resulttype)=@_;
1.70 albertel 792: my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
793: my $response;
794: if (!defined($temp)) {
795: $temp=1;
796: } else {
797: $formparm.=":$temp";
798: }
799: my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
800: 'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
801: 'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,'V'=>21,
802: 'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);
1.120 albertel 803: if ($env{'form.submitted'} eq 'scantron') {
1.71 albertel 804: my $part = $Apache::inputtags::part;
805: my $id = $Apache::inputtags::response[-1];
1.120 albertel 806: $response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
1.70 albertel 807: '.answer'};
1.71 albertel 808: # save bubbled letter for later
809: $Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
810: $response;
1.90 albertel 811: if ($resulttype ne 'letter') {
1.104 albertel 812: if ($resulttype eq 'A is 1') {
1.105 albertel 813: $response = $let_to_num{$response}+1;
814: } else {
1.104 albertel 815: $response = $let_to_num{$response};
816: }
1.90 albertel 817: }
1.70 albertel 818: } else {
1.120 albertel 819: $response = $env{$formparm};
1.70 albertel 820: }
821: return $response;
1.62 albertel 822: }
1.71 albertel 823:
824: sub repetition {
825: my $id = $Apache::inputtags::part;
826: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.121 albertel 827: if (!defined($weight) || ($weight eq '')) { $weight=1; }
1.125 albertel 828: my $repetition = int($weight/10);
829: if ($weight % 10 != 0) { $repetition++; }
1.72 albertel 830: return $repetition;
831: }
832:
833: sub scored_response {
834: my ($part,$id)=@_;
835: my $repetition=&repetition();
836: my $score=0;
837: for (my $i=0;$i<$repetition;$i++) {
1.125 albertel 838: # A is 1, B is 2, etc. (get response return 0-9 and then we add 1)
1.72 albertel 839: my $increase=&Apache::response::getresponse($i+1);
840: if ($increase ne '') { $score+=$increase+1; }
841: }
842: my $weight = &Apache::lonnet::EXT("resource.$part.weight");
1.91 albertel 843: if (!defined($weight) || $weight eq '' || $weight eq 0) { $weight = 1; }
1.72 albertel 844: my $pcr=$score/$weight;
845: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=$pcr;
846: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
847: 'ASSIGNED_SCORE';
1.71 albertel 848: return $repetition;
1.78 albertel 849: }
850:
851: sub whichorder {
852: my ($max,$randomize,$showall,$hash)=@_;
853: #&Apache::lonxml::debug("man $max randomize $randomize");
854: if (!defined(@{ $$hash{'names'} })) { return; }
855: my @names = @{ $$hash{'names'} };
856: my @whichopt =();
857: my (%top,@toplist,%bottom,@bottomlist);
858: if (!($showall || ($randomize eq 'no'))) {
859: my $current=0;
860: foreach my $name (@names) {
861: $current++;
862: if ($$hash{"$name.location"} eq 'top') {
863: $top{$name}=$current;
864: } elsif ($$hash{"$name.location"} eq 'bottom') {
865: $bottom{$name}=$current;
866: }
867: }
868: }
869: my $topcount=0;
870: my $bottomcount=0;
871: while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
872: && ($#names > -1)) {
873: #&Apache::lonxml::debug("Have $#whichopt max is $max");
874: my $aopt;
875: if ($showall || ($randomize eq 'no')) {
876: $aopt=0;
877: } else {
878: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
879: }
880: #&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
881: $aopt=splice(@names,$aopt,1);
882: #&Apache::lonxml::debug("Picked $aopt");
883: if ($top{$aopt}) {
884: $toplist[$top{$aopt}]=$aopt;
885: $topcount++;
886: } elsif ($bottom{$aopt}) {
887: $bottomlist[$bottom{$aopt}]=$aopt;
888: $bottomcount++;
889: } else {
890: push (@whichopt,$aopt);
891: }
892: }
893: for (my $i=0;$i<=$#toplist;$i++) {
894: if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
895: }
896: for (my $i=0;$i<=$#bottomlist;$i++) {
897: if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
898: }
899: return @whichopt;
1.71 albertel 900: }
901:
1.85 albertel 902: sub show_answer {
903: my $part = $Apache::inputtags::part;
904: my $award = $Apache::lonhomework::history{"resource.$part.solved"};
905: my $status = $Apache::inputtags::status[-1];
906: return ( ($award =~ /^correct/
907: && lc($Apache::lonhomework::problemstatus) ne 'no')
908: || $status eq "SHOW_ANSWER");
909: }
1.87 albertel 910:
911: sub analyze_store_foilgroup {
912: my ($shown,$attrs)=@_;
913: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
914: foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
915: if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
916: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
917: foreach my $attr (@$attrs) {
918: $Apache::lonhomework::analyze{"$part_id.foil.".$attr.".$name"} =
919: $Apache::response::foilgroup{"$name.".$attr};
920: }
921: }
922: push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} }, @{ $shown });
1.96 albertel 923: }
924:
925: sub check_if_computed {
926: my ($token,$parstack,$safeeval,$name)=@_;
927: my $value = &Apache::lonxml::get_param($name,$parstack,$safeeval);
1.106 matthew 928: if (ref($token->[2]) eq 'HASH' && $value ne $token->[2]{$name}) {
1.96 albertel 929: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
930: $Apache::lonhomework::analyze{"$part_id.answercomputed"} = 1;
931: }
1.87 albertel 932: }
933:
934: sub pick_foil_for_concept {
935: my ($target,$attrs,$hinthash,$parstack,$safeeval)=@_;
936: if (not defined(@{ $Apache::response::conceptgroup{'names'} })) { return; }
937: my @names = @{ $Apache::response::conceptgroup{'names'} };
938: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
939: my $name=$names[$pick];
940: push @{ $Apache::response::foilgroup{'names'} }, $name;
941: foreach my $attr (@$attrs) {
942: $Apache::response::foilgroup{"$name.".$attr} =
943: $Apache::response::conceptgroup{"$name.".$attr};
944: }
945: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
946: $Apache::response::foilgroup{"$name.concept"} = $concept;
947: &Apache::lonxml::debug("Selecting $name in $concept");
948: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
949: if ($target eq 'analyze') {
950: push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
951: $concept);
952: $Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
953: $Apache::response::conceptgroup{'names'};
954: foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
955: push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
956: $name);
957: foreach my $attr (@$attrs) {
958: $Apache::lonhomework::analyze{"$part_id.foil.$attr.$name"}=
959: $Apache::response::conceptgroup{"$name.$attr"};
960: }
961: }
962: }
963: push(@{ $hinthash->{"$part_id.concepts"} },$concept);
964: $hinthash->{"$part_id.concept.$concept"}=
965: $Apache::response::conceptgroup{'names'};
966:
967: }
968:
1.95 albertel 969: sub get_response_param {
970: my ($id,$name,$default)=@_;
971: my $parameter;
1.120 albertel 972: if ($env{'request.state'} eq 'construct' &&
1.95 albertel 973: defined($Apache::inputtags::params{$name})) {
974: $parameter=$Apache::inputtags::params{$name};
975: } else {
976: $parameter=&Apache::lonnet::EXT("resource.$id.$name");
977: }
978: if (!defined($parameter) || $parameter eq '') {
979: $parameter = $default;
980: }
981: return $parameter;
982: }
1.87 albertel 983:
1.113 albertel 984: sub submitted {
985: my ($who)=@_;
986:
987: # when scatron grading any submission is a submission
1.120 albertel 988: if ($env{'form.submitted'} eq 'scantron') { return 1; }
1.113 albertel 989: # if the caller only cared if this was a scantron submission
990: if ($who eq 'scantron') { return 0; }
991: # if the Submit Answer button for this particular part was pressed
992: my $partid=$Apache::inputtags::part;
1.120 albertel 993: if (defined($env{'form.submit_'.$partid})) { return 1; }
1.122 albertel 994: # Submit All button on a .page was pressed
995: if (defined($env{'form.all_submit'})) { return 1; }
1.113 albertel 996: # otherwise no submission occured
997: return 0;
998: }
1.117 albertel 999:
1.130 albertel 1000: sub add_to_gradingqueue {
1.131 albertel 1001: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1002: if ( $courseid eq ''
1003: || $symb eq ''
1.135 albertel 1004: || $env{'request.state'} eq 'construct'
1005: || $Apache::lonhomework::type ne 'problem') {
1.131 albertel 1006: return;
1007: }
1.130 albertel 1008:
1009: my %queue_info = ( 'type' => 'problem',
1010: 'time' => time);
1011:
1012: if (exists($Apache::lonhomework::history{"resource.0.checkedin.slot"})) {
1013: $queue_info{'slot'}=
1014: $Apache::lonhomework::history{"resource.0.checkedin.slot"};
1015: }
1016:
1017: my $result=&Apache::bridgetask::add_to_queue('gradingqueue',\%queue_info);
1018: if ($result ne 'ok') {
1019: &Apache::lonxml::error("add_to_queue said $result");
1020: }
1021: }
1022:
1.117 albertel 1023: # basically undef and 0 (both false) mean that they still have work to do
1024: # and all true values mean that they can't do any more work
1025: #
1026: # a return of undef means it is unattempted
1027: # a return of 0 means it is attmpted and wrong but still has tries
1028: # a return of 1 means it is marked correct
1029: # a return of 2 means they have exceed maximum number of tries
1030: # a return of 3 means it after the answer date
1031: sub check_status {
1032: my ($id)=@_;
1.143 albertel 1033: if (!defined($id)) { $id=$Apache::inputtags::part; }
1.117 albertel 1034: my $curtime=&Apache::lonnet::EXT('system.time');
1035: my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
1036: my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");
1037: my $answerdate=&Apache::lonnet::EXT("resource.$id.answerdate");
1038: if ( $opendate && $curtime > $opendate &&
1039: $duedate && $curtime > $duedate &&
1040: $answerdate && $curtime > $answerdate) {
1041: return 3;
1042: }
1043: my $status=&Apache::lonnet::EXT("user.resource.resource.$id.solved");
1044: if ($status =~ /^correct/) { return 1; }
1045: if (!$status) { return undef; }
1046: my $maxtries=&Apache::lonnet::EXT("resource.$id.maxtries");
1047: if ($maxtries eq '') { $maxtries=2; }
1048: my $curtries=&Apache::lonnet::EXT("user.resource.resource.$id.tries");
1049: if ($curtries < $maxtries) { return 0; }
1050: return 2;
1051: }
1052:
1.1 albertel 1053: 1;
1054: __END__
1.38 albertel 1055:
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