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Revision Log
The pgProblemEditor module now handles the seed and displayMode correctly. -- Mike
1 ################################################################################ 2 # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project 3 # $Id$ 4 ################################################################################ 5 6 package WeBWorK::ContentGenerator::Problem; 7 use base qw(WeBWorK::ContentGenerator); 8 9 =head1 NAME 10 11 WeBWorK::ContentGenerator::Problem - Allow a student to interact with a problem. 12 13 =cut 14 15 use strict; 16 use warnings; 17 use CGI qw(); 18 use File::Path qw(rmtree); 19 use File::Temp qw(tempdir); 20 use WeBWorK::Form; 21 use WeBWorK::PG; 22 use WeBWorK::PG::IO; 23 use WeBWorK::Utils qw(writeLog encodeAnswers decodeAnswers ref2string); 24 25 ############################################################ 26 # 27 # user 28 # effectiveUser 29 # key 30 # 31 # displayMode 32 # showOldAnswers 33 # showCorrectAnswers 34 # showHints 35 # showSolutions 36 # 37 # AnSwEr# - answer blanks in problem 38 # 39 # redisplay - name of the "Redisplay Problem" button 40 # submitAnswers - name of "Submit Answers" button 41 # checkAnswers - name of the "Check Answers" button 42 # previewAnswers - name of the "Preview Answers" button 43 # 44 ############################################################ 45 46 sub pre_header_initialize { 47 my ($self, $setName, $problemNumber) = @_; 48 my $r = $self->{r}; 49 my $courseEnv = $self->{ce}; 50 my $db = $self->{db}; 51 my $userName = $r->param('user'); 52 my $effectiveUserName = $r->param('effectiveUser'); 53 54 my $user = $db->getUser($userName); 55 my $effectiveUser = $db->getUser($effectiveUserName); 56 my $set = $db->getGlobalUserSet($effectiveUserName, $setName); 57 my $problem = $db->getGlobalUserProblem($effectiveUserName, $setName, $problemNumber); 58 my $psvn = $set->psvn(); 59 my $permissionLevel = $db->getPermissionLevel($userName)->permission(); 60 61 $self->{userName} = $userName; 62 $self->{user} = $user; 63 $self->{effectiveUser} = $effectiveUser; 64 $self->{set} = $set; 65 $self->{problem} = $problem; 66 $self->{permissionLevel} = $permissionLevel; 67 68 ##### form processing ##### 69 70 # set options from form fields (see comment at top of file for names) 71 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 72 my $redisplay = $r->param("redisplay"); 73 my $submitAnswers = $r->param("submitAnswers"); 74 my $checkAnswers = $r->param("checkAnswers"); 75 my $previewAnswers = $r->param("previewAnswers"); 76 77 # fields which may be defined when using Problem Editor 78 my $override_seed = ($permissionLevel>=10) ? $r->param('problemSeed') : undef; 79 my $override_problem_source = ($permissionLevel>=10) ? $r->param('sourceFilePath') : undef; 80 my $editMode = undef; 81 my $submit_button = $r->param('submit_button'); 82 if ( defined($submit_button ) ) { 83 $editMode = "temporaryFile" if $submit_button eq 'Refresh'; 84 $editMode = 'savedFile' if $submit_button eq 'Save'; 85 } 86 # coerce form fields into CGI::Vars format 87 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 88 89 $self->{displayMode} = $displayMode; 90 $self->{redisplay} = $redisplay; 91 $self->{submitAnswers} = $submitAnswers; 92 $self->{checkAnswers} = $checkAnswers; 93 $self->{previewAnswers} = $previewAnswers; 94 $self->{formFields} = $formFields; 95 96 $self->{current_problem_source} = (defined($override_problem_source) ) ? 97 $override_problem_source : 98 $problem->source_file; 99 $self->{edit_mode} = $editMode; 100 ##### permissions ##### 101 102 # are we allowed to view this problem? 103 $self->{isOpen} = time >= $set->open_date || $permissionLevel > 0; 104 return unless $self->{isOpen}; 105 106 # what does the user want to do? 107 my %want = ( 108 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 109 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 110 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 111 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 112 recordAnswers => $submitAnswers, 113 checkAnswers => $checkAnswers, 114 ); 115 116 # are certain options enforced? 117 my %must = ( 118 showOldAnswers => 0, 119 showCorrectAnswers => 0, 120 showHints => 0, 121 showSolutions => 0, 122 recordAnswers => mustRecordAnswers($permissionLevel), 123 checkAnswers => 0, 124 ); 125 126 # does the user have permission to use certain options? 127 my %can = ( 128 showOldAnswers => 1, 129 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 130 showHints => 1, 131 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 132 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 133 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 134 # attempts=num_correct+num_incorrect+1, as this happens before updating $problem 135 checkAnswers => canCheckAnswers($permissionLevel, $set->answer_date), 136 ); 137 138 # final values for options 139 my %will; 140 foreach (keys %must) { 141 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 142 } 143 144 ##### sticky answers ##### 145 146 if (not $submitAnswers and $will{showOldAnswers}) { 147 # do this only if new answers are NOT being submitted 148 my %oldAnswers = decodeAnswers($problem->last_answer); 149 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 150 } 151 152 ##### translation ##### 153 154 my $pg = WeBWorK::PG->new( 155 $courseEnv, 156 $effectiveUser, 157 $r->param('key'), 158 $set, 159 $problem, 160 $psvn, 161 $formFields, 162 { # translation options 163 displayMode => $displayMode, 164 override_seed => $override_seed, 165 override_problem_source =>$override_problem_source, 166 showHints => $will{showHints}, 167 showSolutions => $will{showSolutions}, 168 refreshMath2img => $will{showHints} || $will{showSolutions}, 169 processAnswers => 1, 170 }, 171 ); 172 173 ##### fix hint/solution options ##### 174 175 $can{showHints} &&= $pg->{flags}->{hintExists}; 176 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 177 178 ##### store fields ##### 179 180 $self->{want} = \%want; 181 $self->{must} = \%must; 182 $self->{can} = \%can; 183 $self->{will} = \%will; 184 185 $self->{pg} = $pg; 186 } 187 188 sub if_warnings($$) { 189 my ($self, $arg) = @_; 190 return 0 unless $self->{isOpen}; 191 return $self->{pg}->{warnings} ne ""; 192 } 193 194 sub if_errors($$) { 195 my ($self, $arg) = @_; 196 return 0 unless $self->{isOpen}; 197 return $self->{pg}->{flags}->{error_flag}; 198 } 199 200 sub head { 201 my $self = shift; 202 return "" unless $self->{isOpen}; 203 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 204 } 205 206 sub path { 207 my $self = shift; 208 my $args = $_[-1]; 209 my $setName = $self->{set}->set_id; 210 my $problemNumber = $self->{problem}->problem_id; 211 212 my $ce = $self->{ce}; 213 my $root = $ce->{webworkURLs}->{root}; 214 my $courseName = $ce->{courseName}; 215 return $self->pathMacro($args, 216 "Home" => "$root", 217 $courseName => "$root/$courseName", 218 $setName => "$root/$courseName/$setName", 219 "Problem $problemNumber" => "", 220 ); 221 } 222 223 sub siblings { 224 my $self = shift; 225 my $setName = $self->{set}->set_id; 226 my $problemNumber = $self->{problem}->problem_id; 227 228 my $ce = $self->{ce}; 229 my $db = $self->{db}; 230 my $root = $ce->{webworkURLs}->{root}; 231 my $courseName = $ce->{courseName}; 232 233 print CGI::strong("Problems"), CGI::br(); 234 235 my $effectiveUser = $self->{r}->param("effectiveUser"); 236 my @problems; 237 push @problems, $db->getGlobalUserProblem($effectiveUser, $setName, $_) 238 foreach ($db->listUserProblems($effectiveUser, $setName)); 239 foreach my $problem (sort { $a->problem_id <=> $b->problem_id } @problems) { 240 print CGI::a({-href=>"$root/$courseName/$setName/".$problem->problem_id."/?" 241 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 242 "Problem ".$problem->problem_id), CGI::br(); 243 } 244 } 245 246 sub nav { 247 my $self = shift; 248 my $args = $_[-1]; 249 my $setName = $self->{set}->set_id; 250 my $problemNumber = $self->{problem}->problem_id; 251 252 my $ce = $self->{ce}; 253 my $db = $self->{db}; 254 my $root = $ce->{webworkURLs}->{root}; 255 my $courseName = $ce->{courseName}; 256 257 my $wwdb = $self->{wwdb}; 258 my $effectiveUser = $self->{r}->param("effectiveUser"); 259 my $tail = "&displayMode=".$self->{displayMode}; 260 261 my @links = ("Problem List" , "$root/$courseName/$setName", "navProbList"); 262 263 my $prevProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber-1); 264 my $nextProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber+1); 265 unshift @links, "Previous Problem" , ($prevProblem 266 ? "$root/$courseName/$setName/".$prevProblem->problem_id 267 : "") , "navPrev"; 268 push @links, "Next Problem" , ($nextProblem 269 ? "$root/$courseName/$setName/".$nextProblem->problem_id 270 : "") , "navNext"; 271 272 return $self->navMacro($args, $tail, @links); 273 } 274 275 sub title { 276 my $self = shift; 277 my $setName = $self->{set}->set_id; 278 279 my $file_action; 280 my $edit_mode = $self->{edit_mode}; 281 if ( not defined($edit_mode) ) { 282 $file_action = ''; 283 } elsif ( $edit_mode eq 'temporaryFile') { 284 $file_action .= 'Editing temporary file : '. CGI::br() . $self->{current_problem_source}; 285 } elsif ( $edit_mode eq 'savedFile' ){ 286 $file_action .= 'Problem saved to : '. CGI::br() . $self->{current_problem_source}; 287 } 288 my $problemNumber = $self->{problem}->problem_id . " : " . $file_action; 289 290 return "$setName : Problem $problemNumber"; 291 } 292 293 sub body { 294 my $self = shift; 295 296 return CGI::p(CGI::font({-color=>"red"}, "This problem is not available because the problem set that contains it is not yet open.")) 297 unless $self->{isOpen}; 298 299 # unpack some useful variables 300 my $r = $self->{r}; 301 my $db = $self->{db}; 302 my $set = $self->{set}; 303 my $problem = $self->{problem}; 304 my $permissionLevel = $self->{permissionLevel}; 305 my $submitAnswers = $self->{submitAnswers}; 306 my $checkAnswers = $self->{checkAnswers}; 307 my $previewAnswers = $self->{previewAnswers}; 308 my %want = %{ $self->{want} }; 309 my %can = %{ $self->{can} }; 310 my %must = %{ $self->{must} }; 311 my %will = %{ $self->{will} }; 312 my $pg = $self->{pg}; 313 314 ##### translation errors? ##### 315 316 if ($pg->{flags}->{error_flag}) { 317 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 318 } 319 320 ##### answer processing ##### 321 322 # if answers were submitted: 323 if ($submitAnswers) { 324 # get a "pure" (unmerged) UserProblem to modify 325 my $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); 326 # store answers in DB for sticky answers 327 my %answersToStore; 328 my %answerHash = %{ $pg->{answers} }; 329 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 330 foreach (keys %answerHash); 331 my $answerString = encodeAnswers(%answersToStore, 332 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 333 $pureProblem->last_answer($answerString); 334 $problem->last_answer($answerString); 335 $db->putUserProblem($pureProblem); 336 337 # store state in DB if it makes sense 338 if ($will{recordAnswers}) { 339 $problem->status($pg->{state}->{recorded_score}); 340 $problem->attempted(1); 341 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 342 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 343 $pureProblem->status($pg->{state}->{recorded_score}); 344 $pureProblem->attempted(1); 345 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 346 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 347 $db->putUserProblem($pureProblem); 348 # write to the transaction log, just to make sure 349 writeLog($self->{ce}, "transaction", 350 $problem->problem_id."\t". 351 $problem->set_id."\t". 352 $problem->user_id."\t". 353 $problem->source_file."\t". 354 $problem->value."\t". 355 $problem->max_attempts."\t". 356 $problem->problem_seed."\t". 357 $pureProblem->status."\t". 358 $pureProblem->attempted."\t". 359 $pureProblem->last_answer."\t". 360 $pureProblem->num_correct."\t". 361 $pureProblem->num_incorrect 362 ); 363 } 364 } 365 # logging student answers 366 my $pastAnswerLog = undef; 367 if (defined( $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'} )) { 368 369 $pastAnswerLog = $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'}; 370 371 if ($submitAnswers and defined($pastAnswerLog) ) { 372 my $answerString = ""; 373 my %answerHash = %{ $pg->{answers} }; 374 $answerString = $answerString . $answerHash{$_}->{original_student_ans}."\t" 375 foreach (sort keys %answerHash); 376 writeLog($self->{ce}, "pastAnswerList", 377 '|'.$problem->user_id. 378 '|'.$problem->set_id. 379 '|'.$problem->problem_id.'|'."\t". 380 time()."\t". 381 $answerString, 382 383 ); 384 385 } 386 387 } 388 # end logging student answers 389 390 ##### output ##### 391 print CGI::start_div({class=>"problemHeader"}); 392 # attempt summary 393 if ($submitAnswers or $will{showCorrectAnswers}) { 394 # print this if user submitted answers OR requested correct answers 395 print $self->attemptResults($pg, $submitAnswers, 396 $will{showCorrectAnswers}, 397 $pg->{flags}->{showPartialCorrectAnswers}, 1, 0); 398 } elsif ($checkAnswers) { 399 # print this if user previewed answers 400 print $self->attemptResults($pg, 1, 0, 1, 1, 0); 401 # show attempt answers 402 # don't show correct answers 403 # show attempt results (correctness) 404 # don't show attempt previews 405 } elsif ($previewAnswers) { 406 # print this if user previewed answers 407 print $self->attemptResults($pg, 1, 0, 0, 0, 1); 408 # show attempt answers 409 # don't show correct answers 410 # don't show attempt results (correctness) 411 # show attempt previews 412 } 413 414 print CGI::end_div(); 415 416 print CGI::start_div({class=>"problem"}); 417 #print CGI::hr(); 418 # main form 419 print 420 CGI::startform("POST", $r->uri), 421 $self->hidden_authen_fields, 422 CGI::p($pg->{body_text}), 423 CGI::p($pg->{result}->{msg} ? CGI::b("Note: ") : "", CGI::i($pg->{result}->{msg})), 424 CGI::p( 425 ($can{recordAnswers} 426 ? CGI::submit(-name=>"submitAnswers", 427 -label=>"Submit Answers") 428 : ""), 429 ($can{checkAnswers} 430 ? CGI::submit(-name=>"checkAnswers", 431 -label=>"Check Answers") 432 : ""), 433 CGI::submit(-name=>"previewAnswers", 434 -label=>"Preview Answers"), 435 ); 436 print CGI::end_div(); 437 438 print CGI::start_div({class=>"scoreSummary"}); 439 # score summary 440 my $attempts = $problem->num_correct + $problem->num_incorrect; 441 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 442 my $lastScore = int ($problem->status * 100) . "%"; 443 my ($attemptsLeft, $attemptsLeftNoun); 444 if ($problem->max_attempts == -1) { 445 # unlimited attempts 446 $attemptsLeft = "unlimited"; 447 $attemptsLeftNoun = "attempts"; 448 } else { 449 $attemptsLeft = $problem->max_attempts - $attempts; 450 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 451 } 452 453 my $setClosed = 0; 454 my $setClosedMessage; 455 if (time < $set->open_date or time > $set->due_date) { 456 $setClosed = 1; 457 $setClosedMessage = "This problem set is closed."; 458 if ($permissionLevel > 0) { 459 $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded."; 460 } else { 461 $setClosedMessage .= " Additional attempts will not be recorded."; 462 } 463 } 464 print CGI::p( 465 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 466 $problem->attempted 467 ? "Your recorded score is $lastScore." . CGI::br() 468 : "", 469 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 470 ); 471 print CGI::end_div(); 472 print CGI::hr(), CGI::start_div({class=>"viewOptions"}); 473 print 474 $self->viewOptions(),CGI::end_div(), 475 CGI::endform(); 476 477 print CGI::start_div({class=>"problemFooter"}); 478 # feedback form 479 my $ce = $self->{ce}; 480 my $root = $ce->{webworkURLs}->{root}; 481 my $courseName = $ce->{courseName}; 482 my $feedbackURL = "$root/$courseName/feedback/"; 483 484 # arguments for answer inspection button 485 my $prof_url = $ce->{webworkURLs}->{oldProf}; 486 my $cgi_url = $prof_url; 487 $cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 488 my $authen_args = $self->url_authen_args(); 489 my $showPastAnswersURL = "$cgi_url/showPastAnswers.pl"; 490 491 #print feedback form 492 print 493 CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n", 494 $self->hidden_authen_fields,"\n", 495 CGI::hidden("module", __PACKAGE__),"\n", 496 CGI::hidden("set", $set->set_id),"\n", 497 CGI::hidden("problem", $problem->problem_id),"\n", 498 CGI::hidden("displayMode", $self->{displayMode}),"\n", 499 CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n", 500 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n", 501 CGI::hidden("showHints", $will{showHints}),"\n", 502 CGI::hidden("showSolutions", $will{showSolutions}),"\n", 503 CGI::p({-align=>"right"}, 504 CGI::submit(-name=>"feedbackForm", -label=>"Send Feedback") 505 ), 506 CGI::endform(),"\n"; 507 # print answer inspection button 508 if ($self->{permissionLevel} >0) { 509 510 511 print "\n", 512 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"information"),"\n", 513 $self->hidden_authen_fields,"\n", 514 CGI::hidden(-name => 'course', -value=>$courseName), "\n", 515 CGI::hidden(-name => 'probNum', -value=>$problem->problem_id), "\n", 516 CGI::hidden(-name => 'setNum', -value=>$problem->set_id), "\n", 517 CGI::hidden(-name => 'User', -value=>$problem->user_id), "\n", 518 CGI::submit(-name => 'action', -value=>'Show Past Answers'), "\n", 519 CGI::endform(); 520 521 522 523 } 524 # FIXME print editor link 525 # print editor link if the user is an instructor AND the file is not in temporary editing mode 526 if ($self->{permissionLevel}>=10 and ( (not defined($self->{edit_mode})) or $self->{edit_mode} eq 'savedFile') ) { 527 print CGI::a({-href=>"/webwork/$courseName/instructor/pgProblemEditor/".$set->set_id. 528 '/'.$problem->problem_id.'?'.$self->url_authen_args},'Edit this problem'); 529 } 530 print CGI::end_div(); 531 532 # end answer inspection button 533 # warning output 534 if ($pg->{warnings} ne "") { 535 print CGI::hr(), $self->warningOutput($pg->{warnings}); 536 } 537 538 # debugging stuff 539 if (0) { 540 print 541 CGI::hr(), 542 CGI::h2("debugging information"), 543 CGI::h3("form fields"), 544 ref2string($self->{formFields}), 545 CGI::h3("user object"), 546 ref2string($self->{user}), 547 CGI::h3("set object"), 548 ref2string($set), 549 CGI::h3("problem object"), 550 ref2string($problem), 551 CGI::h3("PG object"), 552 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 553 } 554 555 return ""; 556 } 557 558 ##### output utilities ##### 559 560 sub attemptResults($$$$$$) { 561 my $self = shift; 562 my $pg = shift; 563 my $showAttemptAnswers = shift; 564 my $showCorrectAnswers = shift; 565 my $showAttemptResults = $showAttemptAnswers && shift; 566 my $showSummary = shift; 567 my $showAttemptPreview = shift || 0; 568 my $problemResult = $pg->{result}; # the overall result of the problem 569 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 570 571 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 572 573 my $header = CGI::th("Part"); 574 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 575 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 576 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 577 $header .= $showAttemptResults ? CGI::th("Result") : ""; 578 $header .= $showMessages ? CGI::th("messages") : ""; 579 my @tableRows = ( $header ); 580 my $numCorrect; 581 foreach my $name (@answerNames) { 582 my $answerResult = $pg->{answers}->{$name}; 583 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 584 my $preview = ($showAttemptPreview 585 ? $self->previewAnswer($answerResult) 586 : ""); 587 my $correctAnswer = $answerResult->{correct_ans}; 588 my $answerScore = $answerResult->{score}; 589 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 590 591 $numCorrect += $answerScore > 0; 592 my $resultString = $answerScore ? "correct" : "incorrect"; 593 594 # get rid of the goofy prefix on the answer names (supposedly, the format 595 # of the answer names is changeable. this only fixes it for "AnSwEr" 596 $name =~ s/^AnSwEr//; 597 598 my $row = CGI::td($name); 599 $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : ""; 600 $row .= $showAttemptPreview ? CGI::td($preview) : ""; 601 $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : ""; 602 $row .= $showAttemptResults ? CGI::td($resultString) : ""; 603 $row .= $answerMessage ? CGI::td($answerMessage) : ""; 604 push @tableRows, $row; 605 } 606 607 my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 608 my $scorePercent = int ($problemResult->{score} * 100) . "\%"; 609 my $summary = "On this attempt, you answered $numCorrect out of " 610 . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 611 return CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) . ($showSummary ? CGI::p($summary) : ""); 612 } 613 614 sub viewOptions($) { 615 my $self = shift; 616 my $displayMode = $self->{displayMode}; 617 my %must = %{ $self->{must} }; 618 my %can = %{ $self->{can} }; 619 my %will = %{ $self->{will} }; 620 621 my $optionLine; 622 $can{showOldAnswers} and $optionLine .= join "", 623 "Show: ", 624 CGI::checkbox( 625 -name => "showOldAnswers", 626 -checked => $will{showOldAnswers}, 627 -label => "Saved answers", 628 ), " "; 629 $can{showCorrectAnswers} and $optionLine .= join "", 630 CGI::checkbox( 631 -name => "showCorrectAnswers", 632 -checked => $will{showCorrectAnswers}, 633 -label => "Correct answers", 634 ), " "; 635 $can{showHints} and $optionLine .= join "", 636 CGI::checkbox( 637 -name => "showHints", 638 -checked => $will{showHints}, 639 -label => "Hints", 640 ), " "; 641 $can{showSolutions} and $optionLine .= join "", 642 CGI::checkbox( 643 -name => "showSolutions", 644 -checked => $will{showSolutions}, 645 -label => "Solutions", 646 ), " "; 647 $optionLine and $optionLine .= join "", CGI::br(); 648 649 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex"}, 650 "View equations as: ", 651 CGI::radio_group( 652 -name => "displayMode", 653 -values => ['plainText', 'formattedText', 'images'], 654 -default => $displayMode, 655 -labels => { 656 plainText => "plain text", 657 formattedText => "formatted text", 658 images => "images", 659 } 660 ), CGI::br(), 661 $optionLine, 662 CGI::submit(-name=>"redisplay", -label=>"Redisplay Problem"), 663 ); 664 } 665 666 sub previewAnswer($$) { 667 my ($self, $answerResult) = @_; 668 my $ce = $self->{ce}; 669 my $effectiveUser = $self->{effectiveUser}; 670 my $set = $self->{set}; 671 my $problem = $self->{problem}; 672 my $displayMode = $self->{displayMode}; 673 674 # note: right now, we have to do things completely differently when we are 675 # rendering math from INSIDE the translator and from OUTSIDE the translator. 676 # so we'll just deal with each case explicitly here. there's some code 677 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 678 679 my $tex = $answerResult->{preview_latex_string}; 680 681 return "" if $tex eq ""; 682 683 if ($displayMode eq "plainText") { 684 return $tex; 685 } elsif ($displayMode eq "formattedText") { 686 my $tthCommand = $ce->{externalPrograms}->{tth} 687 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 688 . "\\(".$tex."\\)\n" 689 . "END_OF_INPUT\n"; 690 691 # call tth 692 my $result = `$tthCommand`; 693 if ($?) { 694 return "<b>[tth failed: $? $@]</b>"; 695 } 696 return $result; 697 } elsif ($displayMode eq "images") { 698 # how are we going to name this? 699 my $targetPathCommon = "/png/" 700 . $effectiveUser->user_id . "." 701 . $set->set_id . "." 702 . $problem->problem_id . "." 703 . $answerResult->{ans_name} . ".png"; 704 705 # figure out where to put things 706 my $wd = tempdir("webwork-dvipng-XXXXXXXX", DIR => $ce->{courseDirs}->{html_temp}); 707 my $latex = $ce->{externalPrograms}->{latex}; 708 my $dvipng = $ce->{externalPrograms}->{dvipng}; 709 my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 710 # should use surePathToTmpFile, but we have to 711 # isolate it from the problem enivronment first 712 my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 713 714 # call dvipng to generate a preview 715 dvipng($wd, $latex, $dvipng, $tex, $targetPath); 716 rmtree($wd, 0, 0); 717 if (-e $targetPath) { 718 return "<img src=\"$targetURL\" alt=\"$tex\" />"; 719 } else { 720 return "<b>[math2img failed]</b>"; 721 } 722 } 723 } 724 ##### logging subroutine #### 725 726 727 728 ##### permission queries ##### 729 730 # this stuff should be abstracted out into the permissions system 731 # however, the permission system only knows about things in the 732 # course environment and the username. hmmm... 733 734 # also, i should fix these so that they have a consistent calling 735 # format -- perhaps: 736 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 737 738 sub canShowCorrectAnswers($$) { 739 my ($permissionLevel, $answerDate) = @_; 740 return $permissionLevel > 0 || time > $answerDate; 741 } 742 743 sub canShowSolutions($$) { 744 my ($permissionLevel, $answerDate) = @_; 745 return canShowCorrectAnswers($permissionLevel, $answerDate); 746 } 747 748 sub canRecordAnswers($$$$$) { 749 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 750 my $permHigh = $permissionLevel > 0; 751 my $timeOK = time >= $openDate && time <= $dueDate; 752 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 753 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 754 return $recordAnswers; 755 } 756 757 sub canCheckAnswers($$) { 758 my ($permissionLevel, $answerDate) = @_; 759 my $permHigh = $permissionLevel > 0; 760 my $timeOK = time >= $answerDate; 761 my $recordAnswers = $permHigh || $timeOK; 762 return $recordAnswers; 763 } 764 765 sub mustRecordAnswers($) { 766 my ($permissionLevel) = @_; 767 return $permissionLevel == 0; 768 } 769 770 1;
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