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1 : sh002i 449 ################################################################################
2 : sh002i 494 # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project
3 : sh002i 449 # $Id$
4 :     ################################################################################
5 :    
6 : malsyned 353 package WeBWorK::ContentGenerator::Problem;
7 : malsyned 396
8 : sh002i 455 =head1 NAME
9 :    
10 :     WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem.
11 :    
12 :     =cut
13 :    
14 : malsyned 396 use strict;
15 :     use warnings;
16 : sh002i 449 use base qw(WeBWorK::ContentGenerator);
17 :     use CGI qw();
18 : sh002i 455 use WeBWorK::Form;
19 :     use WeBWorK::PG;
20 : sh002i 562 use WeBWorK::Utils qw(writeLog encodeAnswers decodeAnswers ref2string);
21 : malsyned 353
22 : sh002i 449 ############################################################
23 :     #
24 : sh002i 424 # user
25 :     # key
26 : sh002i 415 #
27 : sh002i 424 # displayMode
28 :     # showOldAnswers
29 :     # showCorrectAnswers
30 :     # showHints
31 :     # showSolutions
32 : sh002i 415 #
33 : sh002i 425 # AnSwEr# - answer blanks in problem
34 :     #
35 : sh002i 429 # redisplay - name of the "Redisplay Problem" button
36 :     # submitAnswers - name of "Submit Answers" button
37 : sh002i 449 #
38 :     ############################################################
39 : gage 392
40 : sh002i 476 sub pre_header_initialize {
41 : sh002i 424 my ($self, $setName, $problemNumber) = @_;
42 :     my $courseEnv = $self->{courseEnvironment};
43 :     my $r = $self->{r};
44 :     my $userName = $r->param('user');
45 : malsyned 353
46 : sh002i 429 ##### database setup #####
47 :    
48 : sh002i 449 my $cldb = WeBWorK::DB::Classlist->new($courseEnv);
49 :     my $wwdb = WeBWorK::DB::WW->new($courseEnv);
50 :     my $authdb = WeBWorK::DB::Auth->new($courseEnv);
51 : sh002i 429
52 : sh002i 449 my $user = $cldb->getUser($userName);
53 :     my $set = $wwdb->getSet($userName, $setName);
54 :     my $problem = $wwdb->getProblem($userName, $setName, $problemNumber);
55 : sh002i 502 my $psvn = $wwdb->getPSVN($userName, $setName);
56 : sh002i 429 my $permissionLevel = $authdb->getPermissions($userName);
57 : malsyned 396
58 : sh002i 429 ##### form processing #####
59 :    
60 : sh002i 425 # set options from form fields (see comment at top of file for names)
61 : sh002i 424 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode};
62 : sh002i 425 my $redisplay = $r->param("redisplay");
63 : sh002i 429 my $submitAnswers = $r->param("submitAnswers");
64 : gage 388
65 : sh002i 449 # coerce form fields into CGI::Vars format
66 :     my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars };
67 :    
68 :     ##### permissions #####
69 :    
70 :     # what does the user want to do?
71 : sh002i 431 my %want = (
72 :     showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers},
73 :     showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers},
74 :     showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints},
75 :     showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions},
76 :     recordAnswers => $r->param("recordAnswers") || 1,
77 :     );
78 : sh002i 429
79 : sh002i 431 # are certain options enforced?
80 :     my %must = (
81 :     showOldAnswers => 0,
82 :     showCorrectAnswers => 0,
83 :     showHints => 0,
84 :     showSolutions => 0,
85 :     recordAnswers => mustRecordAnswers($permissionLevel),
86 :     );
87 :    
88 : sh002i 429 # does the user have permission to use certain options?
89 : sh002i 431 my %can = (
90 :     showOldAnswers => 1,
91 :     showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date),
92 :     showHints => 1,
93 :     showSolutions => canShowSolutions($permissionLevel, $set->answer_date),
94 :     recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date,
95 :     $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1),
96 :     # num_correct+num_incorrect+1 -- as this happens before updating $problem
97 :     );
98 : sh002i 429
99 :     # final values for options
100 : sh002i 431 my %will;
101 : sh002i 617 foreach (keys %must) {
102 : sh002i 431 $will{$_} = $can{$_} && ($want{$_} || $must{$_});
103 : sh002i 617 #warn "$_: can? $can{$_} want? $want{$_} must? $must{$_} will? $will{$_}\n";
104 : sh002i 431 }
105 : sh002i 429
106 :     ##### sticky answers #####
107 :    
108 : sh002i 431 if (not $submitAnswers and $will{showOldAnswers}) {
109 :     # do this only if new answers are NOT being submitted
110 : sh002i 429 my %oldAnswers = decodeAnswers($problem->last_answer);
111 :     $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers;
112 :     }
113 :    
114 :     ##### translation #####
115 :    
116 : sh002i 424 my $pg = WeBWorK::PG->new(
117 :     $courseEnv,
118 : sh002i 502 $user,
119 : sh002i 424 $r->param('key'),
120 : sh002i 502 $set,
121 :     $problem,
122 :     $psvn,
123 :     $formFields,
124 : sh002i 424 { # translation options
125 : sh002i 434 displayMode => $displayMode,
126 :     showHints => $will{showHints},
127 :     showSolutions => $will{showSolutions},
128 :     refreshMath2img => $will{showHints} || $will{showSolutions},
129 : sh002i 431 # try leaving processAnswers on all the time?
130 : sh002i 434 processAnswers => 1, #$submitAnswers ? 1 : 0,
131 : sh002i 424 },
132 :     );
133 : gage 392
134 : sh002i 449 ##### store fields #####
135 :    
136 :     $self->{cldb} = $cldb;
137 :     $self->{wwdb} = $wwdb;
138 :     $self->{authdb} = $authdb;
139 :    
140 :     $self->{user} = $user;
141 :     $self->{set} = $set;
142 :     $self->{problem} = $problem;
143 :     $self->{permissionLevel} = $permissionLevel;
144 :    
145 :     $self->{displayMode} = $displayMode;
146 :     $self->{redisplay} = $redisplay;
147 :     $self->{submitAnswers} = $submitAnswers;
148 :     $self->{formFields} = $formFields;
149 :    
150 :     $self->{want} = \%want;
151 :     $self->{must} = \%must;
152 :     $self->{can} = \%can;
153 :     $self->{will} = \%will;
154 :    
155 :     $self->{pg} = $pg;
156 :     }
157 :    
158 : sh002i 558 sub if_warnings($$) {
159 :     my ($self, $arg) = @_;
160 :     return $self->{pg}->{warnings} ne "";
161 :     }
162 :    
163 :     sub if_errors($$) {
164 :     my ($self, $arg) = @_;
165 :     return $self->{pg}->{flags}->{error_flag};
166 :     }
167 :    
168 : sh002i 562 sub head {
169 : sh002i 555 my $self = shift;
170 :    
171 :     return $self->{pg}->{head_text} if $self->{pg}->{head_text};
172 :     }
173 : sh002i 476
174 :     sub path {
175 :     my $self = shift;
176 :     my $args = $_[-1];
177 :     my $setName = $self->{set}->id;
178 :     my $problemNumber = $self->{problem}->id;
179 :    
180 :     my $ce = $self->{courseEnvironment};
181 :     my $root = $ce->{webworkURLs}->{root};
182 :     my $courseName = $ce->{courseName};
183 :     return $self->pathMacro($args,
184 :     "Home" => "$root",
185 :     $courseName => "$root/$courseName",
186 : sh002i 555 $setName => "$root/$courseName/$setName",
187 : sh002i 476 "Problem $problemNumber" => "",
188 :     );
189 :     }
190 :    
191 :     sub siblings {
192 :     my $self = shift;
193 :     my $setName = $self->{set}->id;
194 :     my $problemNumber = $self->{problem}->id;
195 :    
196 :     my $ce = $self->{courseEnvironment};
197 :     my $root = $ce->{webworkURLs}->{root};
198 :     my $courseName = $ce->{courseName};
199 :    
200 : sh002i 526 print CGI::strong("Problems"), CGI::br();
201 :    
202 : sh002i 476 my $wwdb = $self->{wwdb};
203 :     my $user = $self->{r}->param("user");
204 :     my @problems;
205 :     push @problems, $wwdb->getProblem($user, $setName, $_)
206 :     foreach ($wwdb->getProblems($user, $setName));
207 :     foreach my $problem (sort { $a->id <=> $b->id } @problems) {
208 :     print CGI::a({-href=>"$root/$courseName/$setName/".$problem->id."/?"
209 :     . $self->url_authen_args}, "Problem ".$problem->id), CGI::br();
210 :     }
211 :     }
212 :    
213 :     sub nav {
214 :     my $self = shift;
215 :     my $args = $_[-1];
216 :     my $setName = $self->{set}->id;
217 :     my $problemNumber = $self->{problem}->id;
218 :    
219 :     my $ce = $self->{courseEnvironment};
220 :     my $root = $ce->{webworkURLs}->{root};
221 :     my $courseName = $ce->{courseName};
222 :    
223 :     my $wwdb = $self->{wwdb};
224 :     my $user = $self->{r}->param("user");
225 :    
226 : sh002i 555 my @links = ("Problem List" => "$root/$courseName/$setName");
227 : sh002i 476
228 :     my $prevProblem = $wwdb->getProblem($user, $setName, $problemNumber-1);
229 :     my $nextProblem = $wwdb->getProblem($user, $setName, $problemNumber+1);
230 : sh002i 555 unshift @links, "Previous Problem" => $prevProblem
231 :     ? "$root/$courseName/$setName/".$prevProblem->id
232 :     : "";
233 :     push @links, "Next Problem" => $nextProblem
234 :     ? "$root/$courseName/$setName/".$nextProblem->id
235 :     : "";
236 : sh002i 476
237 :     return $self->navMacro($args, @links);
238 :     }
239 :    
240 : sh002i 449 sub title {
241 :     my $self = shift;
242 : sh002i 476 my $setName = $self->{set}->id;
243 :     my $problemNumber = $self->{problem}->id;
244 :    
245 :     return "$setName : Problem $problemNumber";
246 : sh002i 449 }
247 :    
248 :     sub body {
249 :     my $self = shift;
250 :    
251 :     # unpack some useful variables
252 : sh002i 476 my $r = $self->{r};
253 :     my $wwdb = $self->{wwdb};
254 :     my $set = $self->{set};
255 :     my $problem = $self->{problem};
256 :     my $permissionLevel = $self->{permissionLevel};
257 :     my $submitAnswers = $self->{submitAnswers};
258 :     my %will = %{ $self->{will} };
259 :     my $pg = $self->{pg};
260 : sh002i 449
261 :     ##### translation errors? #####
262 :    
263 : sh002i 425 if ($pg->{flags}->{error_flag}) {
264 : sh002i 526 return translationError($pg->{errors}, $pg->{body_text});
265 : sh002i 425 }
266 : sh002i 415
267 : sh002i 429 ##### answer processing #####
268 :    
269 :     # if answers were submitted:
270 :     if ($submitAnswers) {
271 : sh002i 431 # store answers in DB for sticky answers
272 : sh002i 429 my %answersToStore;
273 :     my %answerHash = %{ $pg->{answers} };
274 :     $answersToStore{$_} = $answerHash{$_}->{original_student_ans}
275 :     foreach (keys %answerHash);
276 :     my $answerString = encodeAnswers(%answersToStore,
277 :     @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} });
278 :     $problem->last_answer($answerString);
279 :     $wwdb->setProblem($problem);
280 :    
281 : sh002i 449 # store state in DB if it makes sense
282 : sh002i 431 if ($will{recordAnswers}) {
283 :     $problem->attempted(1);
284 :     $problem->status($pg->{state}->{recorded_score});
285 :     $problem->num_correct($pg->{state}->{num_of_correct_ans});
286 :     $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans});
287 :     $wwdb->setProblem($problem);
288 : sh002i 562 # write to the transaction log, just to make sure
289 :     writeLog($self->{courseEnvironment}, "transaction",
290 :     $problem->id."\t".
291 :     $problem->set_id."\t".
292 :     $problem->login_id."\t".
293 :     $problem->source_file."\t".
294 :     $problem->value."\t".
295 :     $problem->max_attempts."\t".
296 :     $problem->problem_seed."\t".
297 :     $problem->status."\t".
298 :     $problem->attempted."\t".
299 :     $problem->last_answer."\t".
300 :     $problem->num_correct."\t".
301 :     $problem->num_incorrect
302 :     );
303 : sh002i 431 }
304 : sh002i 425 }
305 :    
306 : sh002i 429 ##### output #####
307 : sh002i 425
308 : sh002i 431 # attempt summary
309 :     if ($submitAnswers or $will{showCorrectAnswers}) {
310 :     # print this if user submitted answers OR requested correct answers
311 :     print attemptResults($pg, $submitAnswers, $will{showCorrectAnswers},
312 :     $pg->{flags}->{showPartialCorrectAnswers});
313 :     }
314 : gage 392
315 : sh002i 431 # score summary
316 :     my $attempts = $problem->num_correct + $problem->num_incorrect;
317 :     my $attemptsNoun = $attempts != 1 ? "times" : "time";
318 :     my $lastScore = int ($problem->status * 100) . "%";
319 :     my ($attemptsLeft, $attemptsLeftNoun);
320 :     if ($problem->max_attempts == -1) {
321 :     # unlimited attempts
322 :     $attemptsLeft = "unlimited";
323 :     $attemptsLeftNoun = "attempts";
324 :     } else {
325 :     $attemptsLeft = $problem->max_attempts - $attempts;
326 :     $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts";
327 :     }
328 : sh002i 476 my $setClosedMessage;
329 :     if (time < $set->open_date or time > $set->due_date) {
330 :     $setClosedMessage = "This problem set is closed.";
331 :     if ($permissionLevel > 0) {
332 :     $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded.";
333 :     } else {
334 :     $setClosedMessage .= " Additional attempts will not be recorded.";
335 :     }
336 :     }
337 : sh002i 449 print CGI::p(
338 :     "You have attempted this problem $attempts $attemptsNoun.", CGI::br(),
339 : sh002i 431 $problem->attempted
340 : sh002i 449 ? "Your recorded score is $lastScore." . CGI::br()
341 : sh002i 431 : "",
342 : sh002i 476 "You have $attemptsLeft $attemptsLeftNoun remaining.", CGI::br(),
343 :     $setClosedMessage,
344 : sh002i 431 );
345 :    
346 :     # BY THE WAY..........
347 :     # we have to figure out some way to tell the student if their NEW answer,
348 :     # on THIS attempt, has been recorded. however, this is decided in part by
349 :     # the grader, so is there any way for us to know? we can rule out several
350 :     # cases where the answer is NOT being recorded, because of things decided
351 :     # in &canRecordAnswers...
352 :    
353 : sh002i 449 print CGI::hr();
354 : sh002i 431
355 : sh002i 429 # main form
356 :     print
357 : sh002i 449 CGI::startform("POST", $r->uri),
358 : sh002i 429 $self->hidden_authen_fields,
359 : sh002i 555 $self->viewOptions,
360 : sh002i 449 CGI::p(CGI::i($pg->{result}->{msg})),
361 :     CGI::p($pg->{body_text}),
362 :     CGI::p(CGI::submit(-name=>"submitAnswers", -label=>"Submit Answers")),
363 :     CGI::endform();
364 : sh002i 429
365 : sh002i 558 # warning output
366 :     if ($pg->{warnings} ne "") {
367 :     print CGI::hr(), warningOutput($pg->{warnings});
368 :     }
369 :    
370 : sh002i 424 # debugging stuff
371 : sh002i 435 #print
372 :     # hr(),
373 :     # h2("debugging information"),
374 :     # h3("form fields"),
375 :     # ref2string($formFields),
376 :     # h3("user object"),
377 :     # ref2string($user),
378 :     # h3("set object"),
379 :     # ref2string($set),
380 :     # h3("problem object"),
381 :     # ref2string($problem),
382 :     # h3("PG object"),
383 :     # ref2string($pg, {'WeBWorK::PG::Translator' => 1});
384 : gage 392
385 : sh002i 424 return "";
386 : malsyned 353 }
387 :    
388 : sh002i 431 ##### output utilities #####
389 : sh002i 429
390 : sh002i 526 # this is used by ProblemSet.pm too, so don't fuck it up
391 : sh002i 429 sub translationError($$) {
392 :     my ($error, $details) = @_;
393 :     return
394 : sh002i 449 CGI::h2("Software Error"),
395 :     CGI::p(<<EOF),
396 : sh002i 429 WeBWorK has encountered a software error while attempting to process this problem.
397 :     It is likely that there is an error in the problem itself.
398 :     If you are a student, contact your professor to have the error corrected.
399 :     If you are a professor, please consut the error output below for more informaiton.
400 :     EOF
401 : sh002i 449 CGI::h3("Error messages"), CGI::blockquote(CGI::pre($error)),
402 :     CGI::h3("Error context"), CGI::blockquote(CGI::pre($details));
403 : sh002i 429 }
404 :    
405 : sh002i 558 # this is used by ProblemSet.pm too, so don't fuck it up
406 :     sub warningOutput($) {
407 :     my $warnings = shift;
408 :    
409 :     return
410 :     CGI::h2("Software Warnings"),
411 :     CGI::p(<<EOF),
412 :     WeBWorK has encountered warnings while attempting to process this problem.
413 :     It is likely that this indicates an error or ambiguity in the problem itself.
414 :     If you are a student, contact your professor to have the problem corrected.
415 :     If you are a professor, please consut the error output below for more informaiton.
416 :     EOF
417 :     CGI::h3("Warning messages"),
418 :     CGI::blockquote(CGI::pre($warnings)),
419 :     ;
420 :     }
421 :    
422 : sh002i 429 sub attemptResults($$$) {
423 : sh002i 425 my $pg = shift;
424 : sh002i 431 my $showAttemptAnswers = shift;
425 : sh002i 425 my $showCorrectAnswers = shift;
426 : sh002i 431 my $showAttemptResults = $showAttemptAnswers && shift;
427 : sh002i 425 my $problemResult = $pg->{result}; # the overall result of the problem
428 :     my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} };
429 :    
430 : sh002i 449 my $header = CGI::th("answer");
431 :     $header .= $showAttemptAnswers ? CGI::th("attempt") : "";
432 :     $header .= $showCorrectAnswers ? CGI::th("correct") : "";
433 :     $header .= $showAttemptResults ? CGI::th("result") : "";
434 :     $header .= $showAttemptAnswers ? CGI::th("messages") : "";
435 : sh002i 425 my @tableRows = ( $header );
436 :     my $numCorrect;
437 :     foreach my $name (@answerNames) {
438 :     my $answerResult = $pg->{answers}->{$name};
439 : sh002i 429 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans
440 : sh002i 425 my $correctAnswer = $answerResult->{correct_ans};
441 :     my $answerScore = $answerResult->{score};
442 : sh002i 431 my $answerMessage = $showAttemptAnswers ? $answerResult->{ans_message} : "";
443 : sh002i 425
444 :     $numCorrect += $answerScore > 0;
445 : sh002i 555 my $resultString = $answerScore ? "correct" : "incorrect";
446 : sh002i 425
447 : sh002i 555 # get rid of the goofy prefix on the answer names (supposedly, the format
448 :     # of the answer names is changeable. this only fixes
449 :     $name =~ s/^AnSwEr//;
450 :    
451 : sh002i 449 my $row = CGI::td($name);
452 :     $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : "";
453 :     $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : "";
454 :     $row .= $showAttemptResults ? CGI::td($resultString) : "";
455 :     $row .= $answerMessage ? CGI::td($answerMessage) : "";
456 : sh002i 425 push @tableRows, $row;
457 :     }
458 :    
459 : sh002i 431 my $numCorrectNoun = $numCorrect == 1 ? "question" : "questions";
460 : sh002i 425 my $scorePercent = int ($problemResult->{score} * 100) . "\%";
461 : sh002i 431 my $summary = "On this attempt, you answered $numCorrect $numCorrectNoun out of "
462 : sh002i 425 . scalar @answerNames . " correct, for a score of $scorePercent.";
463 : sh002i 476 return CGI::table({-border=>1}, CGI::Tr(\@tableRows)) . CGI::p($summary);
464 : sh002i 425 }
465 :    
466 : sh002i 449 sub viewOptions($) {
467 :     my $self = shift;
468 :     my $displayMode = $self->{displayMode};
469 :     my %must = %{ $self->{must} };
470 :     my %can = %{ $self->{can} };
471 :     my %will = %{ $self->{will} };
472 : sh002i 431
473 :     my $optionLine;
474 :     $can{showOldAnswers} and $optionLine .= join "",
475 : sh002i 429 "Show: &nbsp;",
476 : sh002i 449 CGI::checkbox(
477 : sh002i 429 -name => "showOldAnswers",
478 : sh002i 431 -checked => $will{showOldAnswers},
479 :     -label => "Saved answers",
480 :     ), "&nbsp;&nbsp;";
481 :     $can{showCorrectAnswers} and $optionLine .= join "",
482 : sh002i 449 CGI::checkbox(
483 : sh002i 429 -name => "showCorrectAnswers",
484 : sh002i 431 -checked => $will{showCorrectAnswers},
485 : sh002i 429 -label => "Correct answers",
486 : sh002i 431 ), "&nbsp;&nbsp;";
487 :     $can{showHints} and $optionLine .= join "",
488 : sh002i 449 CGI::checkbox(
489 : sh002i 429 -name => "showHints",
490 : sh002i 431 -checked => $will{showHints},
491 : sh002i 429 -label => "Hints",
492 : sh002i 431 ), "&nbsp;&nbsp;";
493 :     $can{showSolutions} and $optionLine .= join "",
494 : sh002i 449 CGI::checkbox(
495 : sh002i 429 -name => "showSolutions",
496 : sh002i 431 -checked => $will{showSolutions},
497 : sh002i 429 -label => "Solutions",
498 : sh002i 431 ), "&nbsp;&nbsp;";
499 : sh002i 449 $optionLine and $optionLine .= join "", CGI::br();
500 : sh002i 431
501 : sh002i 449 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex"},
502 : sh002i 431 "View equations as: &nbsp;",
503 : sh002i 449 CGI::radio_group(
504 : sh002i 431 -name => "displayMode",
505 :     -values => ['plainText', 'formattedText', 'images'],
506 :     -default => $displayMode,
507 :     -labels => {
508 :     plainText => "plain text",
509 :     formattedText => "formatted text",
510 :     images => "images",
511 :     }
512 : sh002i 449 ), CGI::br(),
513 : sh002i 431 $optionLine,
514 : sh002i 449 CGI::submit(-name=>"redisplay", -label=>"Redisplay Problem"),
515 : sh002i 429 );
516 :     }
517 :    
518 : sh002i 431 ##### permission queries #####
519 : sh002i 429
520 :     # this stuff should be abstracted out into the permissions system
521 :     # however, the permission system only knows about things in the
522 :     # course environment and the username. hmmm...
523 :    
524 : sh002i 431 # also, i should fix these so that they have a consistent calling
525 :     # format -- perhaps:
526 :     # canPERM($courseEnv, $user, $set, $problem, $permissionLevel)
527 :    
528 : sh002i 429 sub canShowCorrectAnswers($$) {
529 :     my ($permissionLevel, $answerDate) = @_;
530 :     return $permissionLevel > 0 || time > $answerDate;
531 :     }
532 :    
533 :     sub canShowSolutions($$) {
534 :     my ($permissionLevel, $answerDate) = @_;
535 :     return canShowCorrectAnswers($permissionLevel, $answerDate);
536 :     }
537 :    
538 : sh002i 431 sub canRecordAnswers($$$$$) {
539 :     my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_;
540 :     my $permHigh = $permissionLevel > 0;
541 :     my $timeOK = time >= $openDate && time <= $dueDate;
542 : sh002i 617 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts;
543 :     my $recordAnswers = $permHigh || ($timeOK && $attemptsOK);
544 :     return $recordAnswers;
545 : sh002i 429 }
546 :    
547 :     sub mustRecordAnswers($) {
548 :     my ($permissionLevel) = @_;
549 :     return $permissionLevel == 0;
550 :     }
551 :    
552 : sh002i 415 1;
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