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added example Set->UserSet conversion. -sam
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 # obtain the effective user set, or if that is not yet defined obtain global set 57 my $set = $db->getGlobalUserSet($effectiveUserName, $setName); 58 #$set = $db->getGlobalSet($setName) unless defined($set); 59 unless (defined $set) { 60 $userSetClass = $courseEnv->{dbLayout}->{set_user}->{record}; 61 $set = global2user($userSetClass, $db->getGlobalSet($setName)) 62 } 63 # obtain the effective user problem, or if that is not yet defined obtain global problem 64 my $problem = $db->getGlobalUserProblem($effectiveUserName, $setName, $problemNumber); 65 $problem = $db->getGlobalProblem($setName, $problemNumber) unless defined($problem); 66 # FIXME 67 # a better solution at this point would be to take set and problem, convert them to global_user type 68 # so that they have the right methods. 69 # Stuff the local copy of $set and $problem with default data where it won't have been defined 70 # Make sure that nothing bad is stored back in the database. 71 # It would be nice to store lastAnswer somewhere -- perhaps that could be done as a special case. 72 73 74 # This supplies a psvn if $set doesn't have it. Unfortunately the problem is called on to provide 75 # data in many places and it might not even have methods defined. 76 77 # global sets will not have a defined psvn 78 my $psvn; 79 if ($set->can('psvn') ) { 80 $psvn = $set->psvn(); 81 } else { # we are viewing an unassigned problem set, psvn's are irrelevant 82 $psvn = '0000'; 83 } 84 85 my $permissionLevel = $db->getPermissionLevel($userName)->permission(); 86 87 $self->{userName} = $userName; 88 $self->{user} = $user; 89 $self->{effectiveUser} = $effectiveUser; 90 $self->{set} = $set; 91 $self->{problem} = $problem; 92 $self->{permissionLevel} = $permissionLevel; 93 94 ##### form processing ##### 95 96 # set options from form fields (see comment at top of file for names) 97 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 98 my $redisplay = $r->param("redisplay"); 99 my $submitAnswers = $r->param("submitAnswers"); 100 my $checkAnswers = $r->param("checkAnswers"); 101 my $previewAnswers = $r->param("previewAnswers"); 102 103 # fields which may be defined when using Problem Editor 104 my $override_seed = ($permissionLevel>=10) ? $r->param('problemSeed') : undef; 105 my $override_problem_source = ($permissionLevel>=10) ? $r->param('sourceFilePath') : undef; 106 my $editMode = undef; 107 my $submit_button = $r->param('submit_button'); 108 if ( defined($submit_button ) ) { 109 $editMode = "temporaryFile" if $submit_button eq 'Refresh'; 110 $editMode = 'savedFile' if $submit_button eq 'Save'; 111 } 112 # coerce form fields into CGI::Vars format 113 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 114 115 $self->{displayMode} = $displayMode; 116 $self->{redisplay} = $redisplay; 117 $self->{submitAnswers} = $submitAnswers; 118 $self->{checkAnswers} = $checkAnswers; 119 $self->{previewAnswers} = $previewAnswers; 120 $self->{formFields} = $formFields; 121 122 $self->{current_problem_source} = (defined($override_problem_source) ) ? 123 $override_problem_source : 124 $problem->source_file; 125 $self->{edit_mode} = $editMode; 126 ##### permissions ##### 127 128 # are we allowed to view this problem? 129 $self->{isOpen} = time >= $set->open_date || $permissionLevel > 0; 130 return unless $self->{isOpen}; 131 132 # what does the user want to do? 133 my %want = ( 134 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 135 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 136 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 137 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 138 recordAnswers => $submitAnswers, 139 checkAnswers => $checkAnswers, 140 ); 141 142 # are certain options enforced? 143 my %must = ( 144 showOldAnswers => 0, 145 showCorrectAnswers => 0, 146 showHints => 0, 147 showSolutions => 0, 148 recordAnswers => mustRecordAnswers($permissionLevel), 149 checkAnswers => 0, 150 ); 151 152 # does the user have permission to use certain options? 153 my %can = ( 154 showOldAnswers => 1, 155 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 156 showHints => 1, 157 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 158 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 159 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 160 # attempts=num_correct+num_incorrect+1, as this happens before updating $problem 161 checkAnswers => canCheckAnswers($permissionLevel, $set->answer_date), 162 ); 163 164 # final values for options 165 my %will; 166 foreach (keys %must) { 167 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 168 } 169 170 ##### sticky answers ##### 171 172 if (not $submitAnswers and $will{showOldAnswers}) { 173 # do this only if new answers are NOT being submitted 174 my %oldAnswers = decodeAnswers($problem->last_answer); 175 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 176 } 177 178 ##### translation ##### 179 180 my $pg = WeBWorK::PG->new( 181 $courseEnv, 182 $effectiveUser, 183 $r->param('key'), 184 $set, 185 $problem, 186 $psvn, 187 $formFields, 188 { # translation options 189 displayMode => $displayMode, 190 override_seed => $override_seed, 191 override_problem_source =>$override_problem_source, 192 showHints => $will{showHints}, 193 showSolutions => $will{showSolutions}, 194 refreshMath2img => $will{showHints} || $will{showSolutions}, 195 processAnswers => 1, 196 }, 197 ); 198 199 ##### fix hint/solution options ##### 200 201 $can{showHints} &&= $pg->{flags}->{hintExists}; 202 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 203 204 ##### store fields ##### 205 206 $self->{want} = \%want; 207 $self->{must} = \%must; 208 $self->{can} = \%can; 209 $self->{will} = \%will; 210 211 $self->{pg} = $pg; 212 } 213 214 sub if_warnings($$) { 215 my ($self, $arg) = @_; 216 return 0 unless $self->{isOpen}; 217 return $self->{pg}->{warnings} ne ""; 218 } 219 220 sub if_errors($$) { 221 my ($self, $arg) = @_; 222 return 0 unless $self->{isOpen}; 223 return $self->{pg}->{flags}->{error_flag}; 224 } 225 226 sub head { 227 my $self = shift; 228 return "" unless $self->{isOpen}; 229 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 230 } 231 232 sub path { 233 my $self = shift; 234 my $args = $_[-1]; 235 my $setName = $self->{set}->set_id; 236 my $problemNumber = $self->{problem}->problem_id; 237 238 my $ce = $self->{ce}; 239 my $root = $ce->{webworkURLs}->{root}; 240 my $courseName = $ce->{courseName}; 241 return $self->pathMacro($args, 242 "Home" => "$root", 243 $courseName => "$root/$courseName", 244 $setName => "$root/$courseName/$setName", 245 "Problem $problemNumber" => "", 246 ); 247 } 248 249 sub siblings { 250 my $self = shift; 251 my $setName = $self->{set}->set_id; 252 my $problemNumber = $self->{problem}->problem_id; 253 254 my $ce = $self->{ce}; 255 my $db = $self->{db}; 256 my $root = $ce->{webworkURLs}->{root}; 257 my $courseName = $ce->{courseName}; 258 259 print CGI::strong("Problems"), CGI::br(); 260 261 my $effectiveUser = $self->{r}->param("effectiveUser"); 262 my @problems; 263 push @problems, $db->getGlobalUserProblem($effectiveUser, $setName, $_) 264 foreach ($db->listUserProblems($effectiveUser, $setName)); 265 foreach my $problem (sort { $a->problem_id <=> $b->problem_id } @problems) { 266 print CGI::a({-href=>"$root/$courseName/$setName/".$problem->problem_id."/?" 267 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 268 "Problem ".$problem->problem_id), CGI::br(); 269 } 270 } 271 272 sub nav { 273 my $self = shift; 274 my $args = $_[-1]; 275 my $setName = $self->{set}->set_id; 276 my $problemNumber = $self->{problem}->problem_id; 277 278 my $ce = $self->{ce}; 279 my $db = $self->{db}; 280 my $root = $ce->{webworkURLs}->{root}; 281 my $courseName = $ce->{courseName}; 282 283 my $wwdb = $self->{wwdb}; 284 my $effectiveUser = $self->{r}->param("effectiveUser"); 285 my $tail = "&displayMode=".$self->{displayMode}; 286 287 my @links = ("Problem List" , "$root/$courseName/$setName", "navProbList"); 288 289 my $prevProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber-1); 290 my $nextProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber+1); 291 unshift @links, "Previous Problem" , ($prevProblem 292 ? "$root/$courseName/$setName/".$prevProblem->problem_id 293 : "") , "navPrev"; 294 push @links, "Next Problem" , ($nextProblem 295 ? "$root/$courseName/$setName/".$nextProblem->problem_id 296 : "") , "navNext"; 297 298 return $self->navMacro($args, $tail, @links); 299 } 300 301 sub title { 302 my $self = shift; 303 my $setName = $self->{set}->set_id; 304 305 my $file_action; 306 my $edit_mode = $self->{edit_mode}; 307 if ( not defined($edit_mode) ) { 308 $file_action = ''; 309 } elsif ( $edit_mode eq 'temporaryFile') { 310 $file_action .= 'Editing temporary file : '. CGI::br() . $self->{current_problem_source}; 311 } elsif ( $edit_mode eq 'savedFile' ){ 312 $file_action .= 'Problem saved to : '. CGI::br() . $self->{current_problem_source}; 313 } 314 my $problemNumber = $self->{problem}->problem_id . " : " . $file_action; 315 316 return "$setName : Problem $problemNumber"; 317 } 318 319 sub body { 320 my $self = shift; 321 322 return CGI::p(CGI::font({-color=>"red"}, "This problem is not available because the problem set that contains it is not yet open.")) 323 unless $self->{isOpen}; 324 325 # unpack some useful variables 326 my $r = $self->{r}; 327 my $db = $self->{db}; 328 my $set = $self->{set}; 329 my $problem = $self->{problem}; 330 my $permissionLevel = $self->{permissionLevel}; 331 my $submitAnswers = $self->{submitAnswers}; 332 my $checkAnswers = $self->{checkAnswers}; 333 my $previewAnswers = $self->{previewAnswers}; 334 my %want = %{ $self->{want} }; 335 my %can = %{ $self->{can} }; 336 my %must = %{ $self->{must} }; 337 my %will = %{ $self->{will} }; 338 my $pg = $self->{pg}; 339 340 ##### translation errors? ##### 341 342 if ($pg->{flags}->{error_flag}) { 343 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 344 } 345 346 ##### answer processing ##### 347 348 # if answers were submitted: 349 if ($submitAnswers) { 350 # get a "pure" (unmerged) UserProblem to modify 351 my $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); 352 # store answers in DB for sticky answers 353 my %answersToStore; 354 my %answerHash = %{ $pg->{answers} }; 355 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 356 foreach (keys %answerHash); 357 my $answerString = encodeAnswers(%answersToStore, 358 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 359 $pureProblem->last_answer($answerString); 360 $problem->last_answer($answerString); 361 $db->putUserProblem($pureProblem); 362 363 # store state in DB if it makes sense 364 if ($will{recordAnswers}) { 365 $problem->status($pg->{state}->{recorded_score}); 366 $problem->attempted(1); 367 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 368 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 369 $pureProblem->status($pg->{state}->{recorded_score}); 370 $pureProblem->attempted(1); 371 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 372 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 373 $db->putUserProblem($pureProblem); 374 # write to the transaction log, just to make sure 375 writeLog($self->{ce}, "transaction", 376 $problem->problem_id."\t". 377 $problem->set_id."\t". 378 $problem->user_id."\t". 379 $problem->source_file."\t". 380 $problem->value."\t". 381 $problem->max_attempts."\t". 382 $problem->problem_seed."\t". 383 $pureProblem->status."\t". 384 $pureProblem->attempted."\t". 385 $pureProblem->last_answer."\t". 386 $pureProblem->num_correct."\t". 387 $pureProblem->num_incorrect 388 ); 389 } 390 } 391 # logging student answers 392 my $pastAnswerLog = undef; 393 if (defined( $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'} )) { 394 395 $pastAnswerLog = $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'}; 396 397 if ($submitAnswers and defined($pastAnswerLog) ) { 398 my $answerString = ""; 399 my %answerHash = %{ $pg->{answers} }; 400 $answerString = $answerString . $answerHash{$_}->{original_student_ans}."\t" 401 foreach (sort keys %answerHash); 402 writeLog($self->{ce}, "pastAnswerList", 403 '|'.$problem->user_id. 404 '|'.$problem->set_id. 405 '|'.$problem->problem_id.'|'."\t". 406 time()."\t". 407 $answerString, 408 409 ); 410 411 } 412 413 } 414 # end logging student answers 415 416 ##### output ##### 417 print CGI::start_div({class=>"problemHeader"}); 418 # attempt summary 419 if ($submitAnswers or $will{showCorrectAnswers}) { 420 # print this if user submitted answers OR requested correct answers 421 print $self->attemptResults($pg, $submitAnswers, 422 $will{showCorrectAnswers}, 423 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 424 } elsif ($checkAnswers) { 425 # print this if user previewed answers 426 print $self->attemptResults($pg, 1, 0, 1, 1, 1); 427 # show attempt answers 428 # don't show correct answers 429 # show attempt results (correctness) 430 # don't show attempt previews 431 } elsif ($previewAnswers) { 432 # print this if user previewed answers 433 print $self->attemptResults($pg, 1, 0, 0, 0, 1); 434 # show attempt answers 435 # don't show correct answers 436 # don't show attempt results (correctness) 437 # show attempt previews 438 } 439 440 print CGI::end_div(); 441 442 print CGI::start_div({class=>"problem"}); 443 #print CGI::hr(); 444 # main form 445 print 446 CGI::startform("POST", $r->uri), 447 $self->hidden_authen_fields, 448 CGI::p($pg->{body_text}), 449 CGI::p($pg->{result}->{msg} ? CGI::b("Note: ") : "", CGI::i($pg->{result}->{msg})), 450 CGI::p( 451 ($can{recordAnswers} 452 ? CGI::submit(-name=>"submitAnswers", 453 -label=>"Submit Answers") 454 : ""), 455 ($can{checkAnswers} 456 ? CGI::submit(-name=>"checkAnswers", 457 -label=>"Check Answers") 458 : ""), 459 CGI::submit(-name=>"previewAnswers", 460 -label=>"Preview Answers"), 461 ); 462 print CGI::end_div(); 463 464 print CGI::start_div({class=>"scoreSummary"}); 465 # score summary 466 my $attempts = $problem->num_correct + $problem->num_incorrect; 467 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 468 my $lastScore = int ($problem->status * 100) . "%"; 469 my ($attemptsLeft, $attemptsLeftNoun); 470 if ($problem->max_attempts == -1) { 471 # unlimited attempts 472 $attemptsLeft = "unlimited"; 473 $attemptsLeftNoun = "attempts"; 474 } else { 475 $attemptsLeft = $problem->max_attempts - $attempts; 476 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 477 } 478 479 my $setClosed = 0; 480 my $setClosedMessage; 481 if (time < $set->open_date or time > $set->due_date) { 482 $setClosed = 1; 483 $setClosedMessage = "This problem set is closed."; 484 if ($permissionLevel > 0) { 485 $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded."; 486 } else { 487 $setClosedMessage .= " Additional attempts will not be recorded."; 488 } 489 } 490 print CGI::p( 491 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 492 $problem->attempted 493 ? "Your recorded score is $lastScore." . CGI::br() 494 : "", 495 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 496 ); 497 print CGI::end_div(); 498 # print CGI::hr(), CGI::start_div({class=>"viewOptions"}); 499 # print $self->viewOptions(),CGI::end_div(), 500 # save state for viewOptions 501 print CGI::hidden(-name => "showOldAnswers", 502 -value => $will{showOldAnswers}, 503 ), 504 CGI::hidden(-name => "showCorrectAnswers", 505 -value => $will{showCorrectAnswers}, 506 ), 507 CGI::hidden(-name => "showHints", 508 -value => $will{showHints}, 509 ), 510 CGI::hidden(-name => "showSolutions", 511 -value => $will{showSolutions}, 512 ), 513 CGI::hidden(-name => "displayMode", 514 -value => $self->{displayMode} 515 ); 516 print CGI::endform(); 517 518 print CGI::start_div({class=>"problemFooter"}); 519 # feedback form 520 my $ce = $self->{ce}; 521 my $root = $ce->{webworkURLs}->{root}; 522 my $courseName = $ce->{courseName}; 523 my $feedbackURL = "$root/$courseName/feedback/"; 524 525 # arguments for answer inspection button 526 my $prof_url = $ce->{webworkURLs}->{oldProf}; 527 my $cgi_url = $prof_url; 528 $cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 529 my $authen_args = $self->url_authen_args(); 530 my $showPastAnswersURL = "$cgi_url/showPastAnswers.pl"; 531 532 533 print CGI::end_div(); 534 print CGI::start_div(); 535 # print answer inspection button 536 if ($self->{permissionLevel} >0) { 537 538 539 print "\n", 540 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"information"),"\n", 541 $self->hidden_authen_fields,"\n", 542 CGI::hidden(-name => 'course', -value=>$courseName), "\n", 543 CGI::hidden(-name => 'probNum', -value=>$problem->problem_id), "\n", 544 CGI::hidden(-name => 'setNum', -value=>$problem->set_id), "\n", 545 CGI::hidden(-name => 'User', -value=>$problem->user_id), "\n", 546 CGI::p( {-align=>"left"}, 547 CGI::submit(-name => 'action', -value=>'Show Past Answers') 548 ), "\n", 549 CGI::endform(); 550 551 552 553 } #print feedback form 554 555 556 print 557 CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n", 558 $self->hidden_authen_fields,"\n", 559 CGI::hidden("module", __PACKAGE__),"\n", 560 CGI::hidden("set", $set->set_id),"\n", 561 CGI::hidden("problem", $problem->problem_id),"\n", 562 CGI::hidden("displayMode", $self->{displayMode}),"\n", 563 CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n", 564 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n", 565 CGI::hidden("showHints", $will{showHints}),"\n", 566 CGI::hidden("showSolutions", $will{showSolutions}),"\n", 567 CGI::p({-align=>"left"}, 568 CGI::submit(-name=>"feedbackForm", -label=>"Contact instructor") 569 ), 570 CGI::endform(),"\n"; 571 572 # FIXME print editor link 573 # print editor link if the user is an instructor AND the file is not in temporary editing mode 574 if ($self->{permissionLevel}>=10 and ( (not defined($self->{edit_mode})) or $self->{edit_mode} eq 'savedFile') ) { 575 print CGI::a({-href=>"/webwork/$courseName/instructor/pgProblemEditor/".$set->set_id. 576 '/'.$problem->problem_id.'?'.$self->url_authen_args},'Edit this problem'); 577 } 578 579 print CGI::end_div(); 580 581 # end answer inspection button 582 # warning output 583 if ($pg->{warnings} ne "") { 584 print CGI::hr(), $self->warningOutput($pg->{warnings}); 585 } 586 587 # debugging stuff 588 if (0) { 589 print 590 CGI::hr(), 591 CGI::h2("debugging information"), 592 CGI::h3("form fields"), 593 ref2string($self->{formFields}), 594 CGI::h3("user object"), 595 ref2string($self->{user}), 596 CGI::h3("set object"), 597 ref2string($set), 598 CGI::h3("problem object"), 599 ref2string($problem), 600 CGI::h3("PG object"), 601 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 602 } 603 604 return ""; 605 } 606 607 ##### output utilities ##### 608 609 sub attemptResults($$$$$$) { 610 my $self = shift; 611 my $pg = shift; 612 my $showAttemptAnswers = shift; 613 my $showCorrectAnswers = shift; 614 my $showAttemptResults = $showAttemptAnswers && shift; 615 my $showSummary = shift; 616 my $showAttemptPreview = shift || 0; 617 my $problemResult = $pg->{result}; # the overall result of the problem 618 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 619 620 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 621 622 my $header = CGI::th("Part"); 623 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 624 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 625 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 626 $header .= $showAttemptResults ? CGI::th("Result") : ""; 627 $header .= $showMessages ? CGI::th("messages") : ""; 628 my @tableRows = ( $header ); 629 my $numCorrect; 630 foreach my $name (@answerNames) { 631 my $answerResult = $pg->{answers}->{$name}; 632 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 633 my $preview = ($showAttemptPreview 634 ? $self->previewAnswer($answerResult) 635 : ""); 636 my $correctAnswer = $answerResult->{correct_ans}; 637 my $answerScore = $answerResult->{score}; 638 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 639 640 $numCorrect += $answerScore > 0; 641 my $resultString = $answerScore ? "correct" : "incorrect"; 642 643 # get rid of the goofy prefix on the answer names (supposedly, the format 644 # of the answer names is changeable. this only fixes it for "AnSwEr" 645 $name =~ s/^AnSwEr//; 646 647 my $row = CGI::td($name); 648 $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : ""; 649 $row .= $showAttemptPreview ? CGI::td($preview) : ""; 650 $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : ""; 651 $row .= $showAttemptResults ? CGI::td($resultString) : ""; 652 $row .= $answerMessage ? CGI::td($answerMessage) : ""; 653 push @tableRows, $row; 654 } 655 656 my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 657 my $scorePercent = int ($problemResult->{score} * 100) . "\%"; 658 my $summary = "On this attempt, you answered $numCorrect out of " 659 . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 660 return CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) . ($showSummary ? CGI::p($summary) : ""); 661 } 662 663 sub viewOptions($) { 664 my $self = shift; 665 my $displayMode = $self->{displayMode}; 666 my %must = %{ $self->{must} }; 667 my %can = %{ $self->{can} }; 668 my %will = %{ $self->{will} }; 669 670 my $optionLine; 671 $can{showOldAnswers} and $optionLine .= join "", 672 "Show: ".CGI::br(), 673 CGI::checkbox( 674 -name => "showOldAnswers", 675 -checked => $will{showOldAnswers}, 676 -label => "Saved answers", 677 ), " ".CGI::br(); 678 $can{showCorrectAnswers} and $optionLine .= join "", 679 CGI::checkbox( 680 -name => "showCorrectAnswers", 681 -checked => $will{showCorrectAnswers}, 682 -label => "Correct answers", 683 ), " ".CGI::br(); 684 $can{showHints} and $optionLine .= join "", 685 CGI::checkbox( 686 -name => "showHints", 687 -checked => $will{showHints}, 688 -label => "Hints", 689 ), " ".CGI::br(); 690 $can{showSolutions} and $optionLine .= join "", 691 CGI::checkbox( 692 -name => "showSolutions", 693 -checked => $will{showSolutions}, 694 -label => "Solutions", 695 ), " ".CGI::br(); 696 $optionLine and $optionLine .= join "", CGI::br(); 697 698 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex align: left"}, 699 "View equations as: ".CGI::br(), 700 CGI::radio_group( 701 -name => "displayMode", 702 -values => ['plainText', 'formattedText', 'images'], 703 -default => $displayMode, 704 -linebreak=>'true', 705 -labels => { 706 plainText => "plain", 707 formattedText => "formatted", 708 images => "images", 709 } 710 ), CGI::br(),CGI::hr(), 711 $optionLine, 712 CGI::submit(-name=>"redisplay", -label=>"Save Options"), 713 ); 714 } 715 716 sub previewAnswer($$) { 717 my ($self, $answerResult) = @_; 718 my $ce = $self->{ce}; 719 my $effectiveUser = $self->{effectiveUser}; 720 my $set = $self->{set}; 721 my $problem = $self->{problem}; 722 my $displayMode = $self->{displayMode}; 723 724 # note: right now, we have to do things completely differently when we are 725 # rendering math from INSIDE the translator and from OUTSIDE the translator. 726 # so we'll just deal with each case explicitly here. there's some code 727 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 728 729 my $tex = $answerResult->{preview_latex_string}; 730 731 return "" if $tex eq ""; 732 733 if ($displayMode eq "plainText") { 734 return $tex; 735 } elsif ($displayMode eq "formattedText") { 736 my $tthCommand = $ce->{externalPrograms}->{tth} 737 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 738 . "\\(".$tex."\\)\n" 739 . "END_OF_INPUT\n"; 740 741 # call tth 742 my $result = `$tthCommand`; 743 if ($?) { 744 return "<b>[tth failed: $? $@]</b>"; 745 } 746 return $result; 747 } elsif ($displayMode eq "images") { 748 # how are we going to name this? 749 my $targetPathCommon = "/png/" 750 . $effectiveUser->user_id . "." 751 . $set->set_id . "." 752 . $problem->problem_id . "." 753 . $answerResult->{ans_name} . ".png"; 754 755 # figure out where to put things 756 my $wd = tempdir("webwork-dvipng-XXXXXXXX", DIR => $ce->{courseDirs}->{html_temp}); 757 my $latex = $ce->{externalPrograms}->{latex}; 758 my $dvipng = $ce->{externalPrograms}->{dvipng}; 759 my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 760 # should use surePathToTmpFile, but we have to 761 # isolate it from the problem enivronment first 762 my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 763 764 # call dvipng to generate a preview 765 dvipng($wd, $latex, $dvipng, $tex, $targetPath); 766 rmtree($wd, 0, 0); 767 if (-e $targetPath) { 768 return "<img src=\"$targetURL\" alt=\"$tex\" />"; 769 } else { 770 return "<b>[math2img failed]</b>"; 771 } 772 } 773 } 774 775 sub options { 776 my $self=shift; 777 my $out; 778 $out .=join("", 779 CGI::startform("POST", $self->{r}->uri), 780 $self->hidden_authen_fields, 781 CGI::hr(), 782 CGI::start_div({class=>"viewOptions"}), 783 $self->viewOptions(),CGI::end_div(), 784 ); 785 return $out; 786 787 } 788 ##### logging subroutine #### 789 790 791 792 ##### permission queries ##### 793 794 # this stuff should be abstracted out into the permissions system 795 # however, the permission system only knows about things in the 796 # course environment and the username. hmmm... 797 798 # also, i should fix these so that they have a consistent calling 799 # format -- perhaps: 800 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 801 802 sub canShowCorrectAnswers($$) { 803 my ($permissionLevel, $answerDate) = @_; 804 return $permissionLevel > 0 || time > $answerDate; 805 } 806 807 sub canShowSolutions($$) { 808 my ($permissionLevel, $answerDate) = @_; 809 return canShowCorrectAnswers($permissionLevel, $answerDate); 810 } 811 812 sub canRecordAnswers($$$$$) { 813 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 814 my $permHigh = $permissionLevel > 0; 815 my $timeOK = time >= $openDate && time <= $dueDate; 816 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 817 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 818 return $recordAnswers; 819 } 820 821 sub canCheckAnswers($$) { 822 my ($permissionLevel, $answerDate) = @_; 823 my $permHigh = $permissionLevel > 0; 824 my $timeOK = time >= $answerDate; 825 my $recordAnswers = $permHigh || $timeOK; 826 return $recordAnswers; 827 } 828 829 sub mustRecordAnswers($) { 830 my ($permissionLevel) = @_; 831 return $permissionLevel == 0; 832 } 833 834 1;
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