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The conversion of set and problem from global to global-user now works. You will get "pink screen" errors for now because not all of the vaules in problem have been given correct defaults. I'll do that next. --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 use WeBWorK::DB::Utils qw(global2user user2global findDefaults); 25 26 ############################################################ 27 # 28 # user 29 # effectiveUser 30 # key 31 # 32 # displayMode 33 # showOldAnswers 34 # showCorrectAnswers 35 # showHints 36 # showSolutions 37 # 38 # AnSwEr# - answer blanks in problem 39 # 40 # redisplay - name of the "Redisplay Problem" button 41 # submitAnswers - name of "Submit Answers" button 42 # checkAnswers - name of the "Check Answers" button 43 # previewAnswers - name of the "Preview Answers" button 44 # 45 ############################################################ 46 47 sub pre_header_initialize { 48 my ($self, $setName, $problemNumber) = @_; 49 my $r = $self->{r}; 50 my $courseEnv = $self->{ce}; 51 my $db = $self->{db}; 52 my $userName = $r->param('user'); 53 my $effectiveUserName = $r->param('effectiveUser'); 54 55 my $user = $db->getUser($userName); 56 my $effectiveUser = $db->getUser($effectiveUserName); 57 # obtain the effective user set, or if that is not yet defined obtain global set 58 my $set = $db->getGlobalUserSet($effectiveUserName, $setName); 59 #$set = $db->getGlobalSet($setName) unless defined($set); 60 unless (defined $set) { 61 my $userSetClass = $courseEnv->{dbLayout}->{set_user}->{record}; 62 $set = global2user($userSetClass, $db->getGlobalSet($setName)); 63 $set->psvn('000'); 64 } 65 # obtain the effective user problem, or if that is not yet defined obtain global problem 66 my $problem = $db->getGlobalUserProblem($effectiveUserName, $setName, $problemNumber); 67 unless (defined $problem) { 68 my $userProblemClass = $courseEnv->{dbLayout}->{problem_user}->{record}; 69 $problem = global2user($userProblemClass, $db->getGlobalProblem($setName,$problemNumber)); 70 $problem->max_attempts(-1); 71 } 72 #$problem = $db->getGlobalProblem($setName, $problemNumber) unless defined($problem); 73 # FIXME 74 # a better solution at this point would be to take set and problem, convert them to global_user type 75 # so that they have the right methods. 76 # Stuff the local copy of $set and $problem with default data where it won't have been defined 77 # Make sure that nothing bad is stored back in the database. 78 # It would be nice to store lastAnswer somewhere -- perhaps that could be done as a special case. 79 80 81 # This supplies a psvn if $set doesn't have it. Unfortunately the problem is called on to provide 82 # data in many places and it might not even have methods defined. 83 84 # global sets will not have a defined psvn 85 my $psvn; 86 if ($set->can('psvn') ) { 87 $psvn = $set->psvn(); 88 } else { # we are viewing an unassigned problem set, psvn's are irrelevant 89 $psvn = '0000'; 90 } 91 92 my $permissionLevel = $db->getPermissionLevel($userName)->permission(); 93 94 $self->{userName} = $userName; 95 $self->{user} = $user; 96 $self->{effectiveUser} = $effectiveUser; 97 $self->{set} = $set; 98 $self->{problem} = $problem; 99 $self->{permissionLevel} = $permissionLevel; 100 101 ##### form processing ##### 102 103 # set options from form fields (see comment at top of file for names) 104 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 105 my $redisplay = $r->param("redisplay"); 106 my $submitAnswers = $r->param("submitAnswers"); 107 my $checkAnswers = $r->param("checkAnswers"); 108 my $previewAnswers = $r->param("previewAnswers"); 109 110 # fields which may be defined when using Problem Editor 111 my $override_seed = ($permissionLevel>=10) ? $r->param('problemSeed') : undef; 112 my $override_problem_source = ($permissionLevel>=10) ? $r->param('sourceFilePath') : undef; 113 my $editMode = undef; 114 my $submit_button = $r->param('submit_button'); 115 if ( defined($submit_button ) ) { 116 $editMode = "temporaryFile" if $submit_button eq 'Refresh'; 117 $editMode = 'savedFile' if $submit_button eq 'Save'; 118 } 119 # coerce form fields into CGI::Vars format 120 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 121 122 $self->{displayMode} = $displayMode; 123 $self->{redisplay} = $redisplay; 124 $self->{submitAnswers} = $submitAnswers; 125 $self->{checkAnswers} = $checkAnswers; 126 $self->{previewAnswers} = $previewAnswers; 127 $self->{formFields} = $formFields; 128 129 $self->{current_problem_source} = (defined($override_problem_source) ) ? 130 $override_problem_source : 131 $problem->source_file; 132 $self->{edit_mode} = $editMode; 133 ##### permissions ##### 134 135 # are we allowed to view this problem? 136 $self->{isOpen} = time >= $set->open_date || $permissionLevel > 0; 137 return unless $self->{isOpen}; 138 139 # what does the user want to do? 140 my %want = ( 141 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 142 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 143 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 144 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 145 recordAnswers => $submitAnswers, 146 checkAnswers => $checkAnswers, 147 ); 148 149 # are certain options enforced? 150 my %must = ( 151 showOldAnswers => 0, 152 showCorrectAnswers => 0, 153 showHints => 0, 154 showSolutions => 0, 155 recordAnswers => mustRecordAnswers($permissionLevel), 156 checkAnswers => 0, 157 ); 158 159 # does the user have permission to use certain options? 160 my %can = ( 161 showOldAnswers => 1, 162 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 163 showHints => 1, 164 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 165 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 166 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 167 # attempts=num_correct+num_incorrect+1, as this happens before updating $problem 168 checkAnswers => canCheckAnswers($permissionLevel, $set->answer_date), 169 ); 170 171 # final values for options 172 my %will; 173 foreach (keys %must) { 174 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 175 } 176 177 ##### sticky answers ##### 178 179 if (not $submitAnswers and $will{showOldAnswers}) { 180 # do this only if new answers are NOT being submitted 181 my %oldAnswers = decodeAnswers($problem->last_answer); 182 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 183 } 184 185 ##### translation ##### 186 187 my $pg = WeBWorK::PG->new( 188 $courseEnv, 189 $effectiveUser, 190 $r->param('key'), 191 $set, 192 $problem, 193 $psvn, 194 $formFields, 195 { # translation options 196 displayMode => $displayMode, 197 override_seed => $override_seed, 198 override_problem_source =>$override_problem_source, 199 showHints => $will{showHints}, 200 showSolutions => $will{showSolutions}, 201 refreshMath2img => $will{showHints} || $will{showSolutions}, 202 processAnswers => 1, 203 }, 204 ); 205 206 ##### fix hint/solution options ##### 207 208 $can{showHints} &&= $pg->{flags}->{hintExists}; 209 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 210 211 ##### store fields ##### 212 213 $self->{want} = \%want; 214 $self->{must} = \%must; 215 $self->{can} = \%can; 216 $self->{will} = \%will; 217 218 $self->{pg} = $pg; 219 } 220 221 sub if_warnings($$) { 222 my ($self, $arg) = @_; 223 return 0 unless $self->{isOpen}; 224 return $self->{pg}->{warnings} ne ""; 225 } 226 227 sub if_errors($$) { 228 my ($self, $arg) = @_; 229 return 0 unless $self->{isOpen}; 230 return $self->{pg}->{flags}->{error_flag}; 231 } 232 233 sub head { 234 my $self = shift; 235 return "" unless $self->{isOpen}; 236 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 237 } 238 239 sub path { 240 my $self = shift; 241 my $args = $_[-1]; 242 my $setName = $self->{set}->set_id; 243 my $problemNumber = $self->{problem}->problem_id; 244 245 my $ce = $self->{ce}; 246 my $root = $ce->{webworkURLs}->{root}; 247 my $courseName = $ce->{courseName}; 248 return $self->pathMacro($args, 249 "Home" => "$root", 250 $courseName => "$root/$courseName", 251 $setName => "$root/$courseName/$setName", 252 "Problem $problemNumber" => "", 253 ); 254 } 255 256 sub siblings { 257 my $self = shift; 258 my $setName = $self->{set}->set_id; 259 my $problemNumber = $self->{problem}->problem_id; 260 261 my $ce = $self->{ce}; 262 my $db = $self->{db}; 263 my $root = $ce->{webworkURLs}->{root}; 264 my $courseName = $ce->{courseName}; 265 266 print CGI::strong("Problems"), CGI::br(); 267 268 my $effectiveUser = $self->{r}->param("effectiveUser"); 269 my @problems; 270 push @problems, $db->getGlobalUserProblem($effectiveUser, $setName, $_) 271 foreach ($db->listUserProblems($effectiveUser, $setName)); 272 foreach my $problem (sort { $a->problem_id <=> $b->problem_id } @problems) { 273 print CGI::a({-href=>"$root/$courseName/$setName/".$problem->problem_id."/?" 274 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 275 "Problem ".$problem->problem_id), CGI::br(); 276 } 277 } 278 279 sub nav { 280 my $self = shift; 281 my $args = $_[-1]; 282 my $setName = $self->{set}->set_id; 283 my $problemNumber = $self->{problem}->problem_id; 284 285 my $ce = $self->{ce}; 286 my $db = $self->{db}; 287 my $root = $ce->{webworkURLs}->{root}; 288 my $courseName = $ce->{courseName}; 289 290 my $wwdb = $self->{wwdb}; 291 my $effectiveUser = $self->{r}->param("effectiveUser"); 292 my $tail = "&displayMode=".$self->{displayMode}; 293 294 my @links = ("Problem List" , "$root/$courseName/$setName", "navProbList"); 295 296 my $prevProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber-1); 297 my $nextProblem = $db->getGlobalUserProblem($effectiveUser, $setName, $problemNumber+1); 298 unshift @links, "Previous Problem" , ($prevProblem 299 ? "$root/$courseName/$setName/".$prevProblem->problem_id 300 : "") , "navPrev"; 301 push @links, "Next Problem" , ($nextProblem 302 ? "$root/$courseName/$setName/".$nextProblem->problem_id 303 : "") , "navNext"; 304 305 return $self->navMacro($args, $tail, @links); 306 } 307 308 sub title { 309 my $self = shift; 310 my $setName = $self->{set}->set_id; 311 312 my $file_action; 313 my $edit_mode = $self->{edit_mode}; 314 if ( not defined($edit_mode) ) { 315 $file_action = ''; 316 } elsif ( $edit_mode eq 'temporaryFile') { 317 $file_action .= 'Editing temporary file : '. CGI::br() . $self->{current_problem_source}; 318 } elsif ( $edit_mode eq 'savedFile' ){ 319 $file_action .= 'Problem saved to : '. CGI::br() . $self->{current_problem_source}; 320 } 321 my $problemNumber = $self->{problem}->problem_id . " : " . $file_action; 322 323 return "$setName : Problem $problemNumber"; 324 } 325 326 sub body { 327 my $self = shift; 328 329 return CGI::p(CGI::font({-color=>"red"}, "This problem is not available because the problem set that contains it is not yet open.")) 330 unless $self->{isOpen}; 331 332 # unpack some useful variables 333 my $r = $self->{r}; 334 my $db = $self->{db}; 335 my $set = $self->{set}; 336 my $problem = $self->{problem}; 337 my $permissionLevel = $self->{permissionLevel}; 338 my $submitAnswers = $self->{submitAnswers}; 339 my $checkAnswers = $self->{checkAnswers}; 340 my $previewAnswers = $self->{previewAnswers}; 341 my %want = %{ $self->{want} }; 342 my %can = %{ $self->{can} }; 343 my %must = %{ $self->{must} }; 344 my %will = %{ $self->{will} }; 345 my $pg = $self->{pg}; 346 347 ##### translation errors? ##### 348 349 if ($pg->{flags}->{error_flag}) { 350 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 351 } 352 353 ##### answer processing ##### 354 355 # if answers were submitted: 356 if ($submitAnswers) { 357 # get a "pure" (unmerged) UserProblem to modify 358 my $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); 359 # store answers in DB for sticky answers 360 my %answersToStore; 361 my %answerHash = %{ $pg->{answers} }; 362 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 363 foreach (keys %answerHash); 364 my $answerString = encodeAnswers(%answersToStore, 365 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 366 $pureProblem->last_answer($answerString); 367 $problem->last_answer($answerString); 368 $db->putUserProblem($pureProblem); 369 370 # store state in DB if it makes sense 371 if ($will{recordAnswers}) { 372 $problem->status($pg->{state}->{recorded_score}); 373 $problem->attempted(1); 374 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 375 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 376 $pureProblem->status($pg->{state}->{recorded_score}); 377 $pureProblem->attempted(1); 378 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 379 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 380 $db->putUserProblem($pureProblem); 381 # write to the transaction log, just to make sure 382 writeLog($self->{ce}, "transaction", 383 $problem->problem_id."\t". 384 $problem->set_id."\t". 385 $problem->user_id."\t". 386 $problem->source_file."\t". 387 $problem->value."\t". 388 $problem->max_attempts."\t". 389 $problem->problem_seed."\t". 390 $pureProblem->status."\t". 391 $pureProblem->attempted."\t". 392 $pureProblem->last_answer."\t". 393 $pureProblem->num_correct."\t". 394 $pureProblem->num_incorrect 395 ); 396 } 397 } 398 # logging student answers 399 my $pastAnswerLog = undef; 400 if (defined( $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'} )) { 401 402 $pastAnswerLog = $self->{ce}->{webworkFiles}->{logs}->{'pastAnswerList'}; 403 404 if ($submitAnswers and defined($pastAnswerLog) ) { 405 my $answerString = ""; 406 my %answerHash = %{ $pg->{answers} }; 407 $answerString = $answerString . $answerHash{$_}->{original_student_ans}."\t" 408 foreach (sort keys %answerHash); 409 writeLog($self->{ce}, "pastAnswerList", 410 '|'.$problem->user_id. 411 '|'.$problem->set_id. 412 '|'.$problem->problem_id.'|'."\t". 413 time()."\t". 414 $answerString, 415 416 ); 417 418 } 419 420 } 421 # end logging student answers 422 423 ##### output ##### 424 print CGI::start_div({class=>"problemHeader"}); 425 # attempt summary 426 if ($submitAnswers or $will{showCorrectAnswers}) { 427 # print this if user submitted answers OR requested correct answers 428 print $self->attemptResults($pg, $submitAnswers, 429 $will{showCorrectAnswers}, 430 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 431 } elsif ($checkAnswers) { 432 # print this if user previewed answers 433 print $self->attemptResults($pg, 1, 0, 1, 1, 1); 434 # show attempt answers 435 # don't show correct answers 436 # show attempt results (correctness) 437 # don't show attempt previews 438 } elsif ($previewAnswers) { 439 # print this if user previewed answers 440 print $self->attemptResults($pg, 1, 0, 0, 0, 1); 441 # show attempt answers 442 # don't show correct answers 443 # don't show attempt results (correctness) 444 # show attempt previews 445 } 446 447 print CGI::end_div(); 448 449 print CGI::start_div({class=>"problem"}); 450 #print CGI::hr(); 451 # main form 452 print 453 CGI::startform("POST", $r->uri), 454 $self->hidden_authen_fields, 455 CGI::p($pg->{body_text}), 456 CGI::p($pg->{result}->{msg} ? CGI::b("Note: ") : "", CGI::i($pg->{result}->{msg})), 457 CGI::p( 458 ($can{recordAnswers} 459 ? CGI::submit(-name=>"submitAnswers", 460 -label=>"Submit Answers") 461 : ""), 462 ($can{checkAnswers} 463 ? CGI::submit(-name=>"checkAnswers", 464 -label=>"Check Answers") 465 : ""), 466 CGI::submit(-name=>"previewAnswers", 467 -label=>"Preview Answers"), 468 ); 469 print CGI::end_div(); 470 471 print CGI::start_div({class=>"scoreSummary"}); 472 # score summary 473 my $attempts = $problem->num_correct + $problem->num_incorrect; 474 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 475 my $lastScore = int ($problem->status * 100) . "%"; 476 my ($attemptsLeft, $attemptsLeftNoun); 477 if ($problem->max_attempts == -1) { 478 # unlimited attempts 479 $attemptsLeft = "unlimited"; 480 $attemptsLeftNoun = "attempts"; 481 } else { 482 $attemptsLeft = $problem->max_attempts - $attempts; 483 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 484 } 485 486 my $setClosed = 0; 487 my $setClosedMessage; 488 if (time < $set->open_date or time > $set->due_date) { 489 $setClosed = 1; 490 $setClosedMessage = "This problem set is closed."; 491 if ($permissionLevel > 0) { 492 $setClosedMessage .= " Since you are a privileged user, additional attempts will be recorded."; 493 } else { 494 $setClosedMessage .= " Additional attempts will not be recorded."; 495 } 496 } 497 print CGI::p( 498 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 499 $problem->attempted 500 ? "Your recorded score is $lastScore." . CGI::br() 501 : "", 502 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 503 ); 504 print CGI::end_div(); 505 # print CGI::hr(), CGI::start_div({class=>"viewOptions"}); 506 # print $self->viewOptions(),CGI::end_div(), 507 # save state for viewOptions 508 print CGI::hidden(-name => "showOldAnswers", 509 -value => $will{showOldAnswers}, 510 ), 511 CGI::hidden(-name => "showCorrectAnswers", 512 -value => $will{showCorrectAnswers}, 513 ), 514 CGI::hidden(-name => "showHints", 515 -value => $will{showHints}, 516 ), 517 CGI::hidden(-name => "showSolutions", 518 -value => $will{showSolutions}, 519 ), 520 CGI::hidden(-name => "displayMode", 521 -value => $self->{displayMode} 522 ); 523 print CGI::endform(); 524 525 print CGI::start_div({class=>"problemFooter"}); 526 # feedback form 527 my $ce = $self->{ce}; 528 my $root = $ce->{webworkURLs}->{root}; 529 my $courseName = $ce->{courseName}; 530 my $feedbackURL = "$root/$courseName/feedback/"; 531 532 # arguments for answer inspection button 533 my $prof_url = $ce->{webworkURLs}->{oldProf}; 534 my $cgi_url = $prof_url; 535 $cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 536 my $authen_args = $self->url_authen_args(); 537 my $showPastAnswersURL = "$cgi_url/showPastAnswers.pl"; 538 539 540 print CGI::end_div(); 541 print CGI::start_div(); 542 # print answer inspection button 543 if ($self->{permissionLevel} >0) { 544 545 546 print "\n", 547 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"information"),"\n", 548 $self->hidden_authen_fields,"\n", 549 CGI::hidden(-name => 'course', -value=>$courseName), "\n", 550 CGI::hidden(-name => 'probNum', -value=>$problem->problem_id), "\n", 551 CGI::hidden(-name => 'setNum', -value=>$problem->set_id), "\n", 552 CGI::hidden(-name => 'User', -value=>$problem->user_id), "\n", 553 CGI::p( {-align=>"left"}, 554 CGI::submit(-name => 'action', -value=>'Show Past Answers') 555 ), "\n", 556 CGI::endform(); 557 558 559 560 } #print feedback form 561 562 563 print 564 CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n", 565 $self->hidden_authen_fields,"\n", 566 CGI::hidden("module", __PACKAGE__),"\n", 567 CGI::hidden("set", $set->set_id),"\n", 568 CGI::hidden("problem", $problem->problem_id),"\n", 569 CGI::hidden("displayMode", $self->{displayMode}),"\n", 570 CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n", 571 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n", 572 CGI::hidden("showHints", $will{showHints}),"\n", 573 CGI::hidden("showSolutions", $will{showSolutions}),"\n", 574 CGI::p({-align=>"left"}, 575 CGI::submit(-name=>"feedbackForm", -label=>"Contact instructor") 576 ), 577 CGI::endform(),"\n"; 578 579 # FIXME print editor link 580 # print editor link if the user is an instructor AND the file is not in temporary editing mode 581 if ($self->{permissionLevel}>=10 and ( (not defined($self->{edit_mode})) or $self->{edit_mode} eq 'savedFile') ) { 582 print CGI::a({-href=>"/webwork/$courseName/instructor/pgProblemEditor/".$set->set_id. 583 '/'.$problem->problem_id.'?'.$self->url_authen_args},'Edit this problem'); 584 } 585 586 print CGI::end_div(); 587 588 # end answer inspection button 589 # warning output 590 if ($pg->{warnings} ne "") { 591 print CGI::hr(), $self->warningOutput($pg->{warnings}); 592 } 593 594 # debugging stuff 595 if (0) { 596 print 597 CGI::hr(), 598 CGI::h2("debugging information"), 599 CGI::h3("form fields"), 600 ref2string($self->{formFields}), 601 CGI::h3("user object"), 602 ref2string($self->{user}), 603 CGI::h3("set object"), 604 ref2string($set), 605 CGI::h3("problem object"), 606 ref2string($problem), 607 CGI::h3("PG object"), 608 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 609 } 610 611 return ""; 612 } 613 614 ##### output utilities ##### 615 616 sub attemptResults($$$$$$) { 617 my $self = shift; 618 my $pg = shift; 619 my $showAttemptAnswers = shift; 620 my $showCorrectAnswers = shift; 621 my $showAttemptResults = $showAttemptAnswers && shift; 622 my $showSummary = shift; 623 my $showAttemptPreview = shift || 0; 624 my $problemResult = $pg->{result}; # the overall result of the problem 625 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 626 627 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 628 629 my $header = CGI::th("Part"); 630 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 631 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 632 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 633 $header .= $showAttemptResults ? CGI::th("Result") : ""; 634 $header .= $showMessages ? CGI::th("messages") : ""; 635 my @tableRows = ( $header ); 636 my $numCorrect; 637 foreach my $name (@answerNames) { 638 my $answerResult = $pg->{answers}->{$name}; 639 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 640 my $preview = ($showAttemptPreview 641 ? $self->previewAnswer($answerResult) 642 : ""); 643 my $correctAnswer = $answerResult->{correct_ans}; 644 my $answerScore = $answerResult->{score}; 645 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 646 647 $numCorrect += $answerScore > 0; 648 my $resultString = $answerScore ? "correct" : "incorrect"; 649 650 # get rid of the goofy prefix on the answer names (supposedly, the format 651 # of the answer names is changeable. this only fixes it for "AnSwEr" 652 $name =~ s/^AnSwEr//; 653 654 my $row = CGI::td($name); 655 $row .= $showAttemptAnswers ? CGI::td($studentAnswer) : ""; 656 $row .= $showAttemptPreview ? CGI::td($preview) : ""; 657 $row .= $showCorrectAnswers ? CGI::td($correctAnswer) : ""; 658 $row .= $showAttemptResults ? CGI::td($resultString) : ""; 659 $row .= $answerMessage ? CGI::td($answerMessage) : ""; 660 push @tableRows, $row; 661 } 662 663 my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 664 my $scorePercent = int ($problemResult->{score} * 100) . "\%"; 665 my $summary = "On this attempt, you answered $numCorrect out of " 666 . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 667 return CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) . ($showSummary ? CGI::p($summary) : ""); 668 } 669 670 sub viewOptions($) { 671 my $self = shift; 672 my $displayMode = $self->{displayMode}; 673 my %must = %{ $self->{must} }; 674 my %can = %{ $self->{can} }; 675 my %will = %{ $self->{will} }; 676 677 my $optionLine; 678 $can{showOldAnswers} and $optionLine .= join "", 679 "Show: ".CGI::br(), 680 CGI::checkbox( 681 -name => "showOldAnswers", 682 -checked => $will{showOldAnswers}, 683 -label => "Saved answers", 684 ), " ".CGI::br(); 685 $can{showCorrectAnswers} and $optionLine .= join "", 686 CGI::checkbox( 687 -name => "showCorrectAnswers", 688 -checked => $will{showCorrectAnswers}, 689 -label => "Correct answers", 690 ), " ".CGI::br(); 691 $can{showHints} and $optionLine .= join "", 692 CGI::checkbox( 693 -name => "showHints", 694 -checked => $will{showHints}, 695 -label => "Hints", 696 ), " ".CGI::br(); 697 $can{showSolutions} and $optionLine .= join "", 698 CGI::checkbox( 699 -name => "showSolutions", 700 -checked => $will{showSolutions}, 701 -label => "Solutions", 702 ), " ".CGI::br(); 703 $optionLine and $optionLine .= join "", CGI::br(); 704 705 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex align: left"}, 706 "View equations as: ".CGI::br(), 707 CGI::radio_group( 708 -name => "displayMode", 709 -values => ['plainText', 'formattedText', 'images'], 710 -default => $displayMode, 711 -linebreak=>'true', 712 -labels => { 713 plainText => "plain", 714 formattedText => "formatted", 715 images => "images", 716 } 717 ), CGI::br(),CGI::hr(), 718 $optionLine, 719 CGI::submit(-name=>"redisplay", -label=>"Save Options"), 720 ); 721 } 722 723 sub previewAnswer($$) { 724 my ($self, $answerResult) = @_; 725 my $ce = $self->{ce}; 726 my $effectiveUser = $self->{effectiveUser}; 727 my $set = $self->{set}; 728 my $problem = $self->{problem}; 729 my $displayMode = $self->{displayMode}; 730 731 # note: right now, we have to do things completely differently when we are 732 # rendering math from INSIDE the translator and from OUTSIDE the translator. 733 # so we'll just deal with each case explicitly here. there's some code 734 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 735 736 my $tex = $answerResult->{preview_latex_string}; 737 738 return "" if $tex eq ""; 739 740 if ($displayMode eq "plainText") { 741 return $tex; 742 } elsif ($displayMode eq "formattedText") { 743 my $tthCommand = $ce->{externalPrograms}->{tth} 744 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 745 . "\\(".$tex."\\)\n" 746 . "END_OF_INPUT\n"; 747 748 # call tth 749 my $result = `$tthCommand`; 750 if ($?) { 751 return "<b>[tth failed: $? $@]</b>"; 752 } 753 return $result; 754 } elsif ($displayMode eq "images") { 755 # how are we going to name this? 756 my $targetPathCommon = "/png/" 757 . $effectiveUser->user_id . "." 758 . $set->set_id . "." 759 . $problem->problem_id . "." 760 . $answerResult->{ans_name} . ".png"; 761 762 # figure out where to put things 763 my $wd = tempdir("webwork-dvipng-XXXXXXXX", DIR => $ce->{courseDirs}->{html_temp}); 764 my $latex = $ce->{externalPrograms}->{latex}; 765 my $dvipng = $ce->{externalPrograms}->{dvipng}; 766 my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 767 # should use surePathToTmpFile, but we have to 768 # isolate it from the problem enivronment first 769 my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 770 771 # call dvipng to generate a preview 772 dvipng($wd, $latex, $dvipng, $tex, $targetPath); 773 rmtree($wd, 0, 0); 774 if (-e $targetPath) { 775 return "<img src=\"$targetURL\" alt=\"$tex\" />"; 776 } else { 777 return "<b>[math2img failed]</b>"; 778 } 779 } 780 } 781 782 sub options { 783 my $self=shift; 784 my $out; 785 $out .=join("", 786 CGI::startform("POST", $self->{r}->uri), 787 $self->hidden_authen_fields, 788 CGI::hr(), 789 CGI::start_div({class=>"viewOptions"}), 790 $self->viewOptions(),CGI::end_div(), 791 ); 792 return $out; 793 794 } 795 ##### logging subroutine #### 796 797 798 799 ##### permission queries ##### 800 801 # this stuff should be abstracted out into the permissions system 802 # however, the permission system only knows about things in the 803 # course environment and the username. hmmm... 804 805 # also, i should fix these so that they have a consistent calling 806 # format -- perhaps: 807 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 808 809 sub canShowCorrectAnswers($$) { 810 my ($permissionLevel, $answerDate) = @_; 811 return $permissionLevel > 0 || time > $answerDate; 812 } 813 814 sub canShowSolutions($$) { 815 my ($permissionLevel, $answerDate) = @_; 816 return canShowCorrectAnswers($permissionLevel, $answerDate); 817 } 818 819 sub canRecordAnswers($$$$$) { 820 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 821 my $permHigh = $permissionLevel > 0; 822 my $timeOK = time >= $openDate && time <= $dueDate; 823 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 824 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 825 return $recordAnswers; 826 } 827 828 sub canCheckAnswers($$) { 829 my ($permissionLevel, $answerDate) = @_; 830 my $permHigh = $permissionLevel > 0; 831 my $timeOK = time >= $answerDate; 832 my $recordAnswers = $permHigh || $timeOK; 833 return $recordAnswers; 834 } 835 836 sub mustRecordAnswers($) { 837 my ($permissionLevel) = @_; 838 return $permissionLevel == 0; 839 } 840 841 1;
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