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Added logic to show the checkAnswer button when you are a professor or TA acting as a student. This allows you to check the answer without recording results. (I think) --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 my $timer0_ON=1; # times pg translation phase 15 use strict; 16 use warnings; 17 use CGI qw(); 18 use File::Path qw(rmtree); 19 use WeBWorK::Form; 20 use WeBWorK::PG; 21 use WeBWorK::PG::ImageGenerator; 22 use WeBWorK::PG::IO; 23 use WeBWorK::Utils qw(writeLog writeCourseLog encodeAnswers decodeAnswers ref2string makeTempDirectory); 24 use WeBWorK::DB::Utils qw(global2user user2global findDefaults); 25 use WeBWorK::Timing; 26 27 ############################################################ 28 # 29 # user 30 # effectiveUser 31 # key 32 # 33 # displayMode 34 # showOldAnswers 35 # showCorrectAnswers 36 # showHints 37 # showSolutions 38 # 39 # AnSwEr# - answer blanks in problem 40 # 41 # redisplay - name of the "Redisplay Problem" button 42 # submitAnswers - name of "Submit Answers" button 43 # checkAnswers - name of the "Check Answers" button 44 # previewAnswers - name of the "Preview Answers" button 45 # 46 ############################################################ 47 48 sub templateName { 49 "problem"; 50 } 51 52 sub pre_header_initialize { 53 my ($self, $setName, $problemNumber) = @_; 54 my $r = $self->{r}; 55 my $courseEnv = $self->{ce}; 56 my $db = $self->{db}; 57 my $userName = $r->param('user'); 58 my $effectiveUserName = $r->param('effectiveUser'); 59 my $key = $r->param('key'); 60 my $user = $db->getUser($userName); 61 my $effectiveUser = $db->getUser($effectiveUserName); 62 my $permissionLevel = $db->getPermissionLevel($userName)->permission(); 63 64 # obtain the merged set for $effectiveUser 65 my $set = $db->getMergedSet($effectiveUserName, $setName); 66 67 # obtain the merged problem for $effectiveUser 68 my $problem = $db->getMergedProblem($effectiveUserName, $setName, $problemNumber); 69 70 my $editMode = $r->param("editMode"); 71 72 if ($permissionLevel > 0 and defined $editMode) { 73 # professors are allowed to fabricate sets and problems not 74 # assigned to them (or anyone). this allows them to use the 75 # editor to 76 77 # if that is not yet defined obtain the global set, convert 78 # it to a user set, and add fake user data 79 unless (defined $set) { 80 my $userSetClass = $db->{set_user}->{record}; 81 $set = global2user($userSetClass, 82 $db->getGlobalSet($setName)); 83 die "Set $setName does not exist" 84 unless defined $set; 85 $set->psvn(0); 86 } 87 88 # if that is not yet defined obtain the global problem, 89 # convert it to a user problem, and add fake user data 90 unless (defined $problem) { 91 my $userProblemClass = $db->{problem_user}->{record}; 92 $problem = global2user($userProblemClass, 93 $db->getGlobalProblem($setName,$problemNumber)); 94 die "Problem $problemNumber in set $setName does not exist" 95 unless defined $problem; 96 $problem->user_id($effectiveUserName); 97 $problem->problem_seed(0); 98 $problem->status(0); 99 $problem->attempted(0); 100 $problem->last_answer(""); 101 $problem->num_correct(0); 102 $problem->num_incorrect(0); 103 } 104 105 # now we're sure we have valid UserSet and UserProblem objects 106 # yay! 107 108 # now deal with possible editor overrides: 109 110 # if the caller is asking to override the source file, and 111 # editMode calls for a temporary file, do so 112 my $sourceFilePath = $r->param("sourceFilePath"); 113 if (defined $sourceFilePath and $editMode eq "temporaryFile") { 114 $problem->source_file($sourceFilePath); 115 } 116 117 # if the caller is asking to override the problem seed, do so 118 my $problemSeed = $r->param("problemSeed"); 119 if (defined $problemSeed) { 120 $problem->problem_seed($problemSeed); 121 } 122 } else { 123 # students can't view problems not assigned to them 124 die "Set $setName is not assigned to $effectiveUserName" 125 unless defined $set; 126 die "Problem $problemNumber in set $setName is not assigned to $effectiveUserName" 127 unless defined $problem; 128 } 129 130 $self->{userName} = $userName; 131 $self->{effectiveUserName} = $effectiveUserName; 132 $self->{user} = $user; 133 $self->{effectiveUser} = $effectiveUser; 134 $self->{permissionLevel} = $permissionLevel; 135 $self->{set} = $set; 136 $self->{problem} = $problem; 137 $self->{editMode} = $editMode; 138 139 ##### form processing ##### 140 141 # set options from form fields (see comment at top of file for names) 142 my $displayMode = $r->param("displayMode") || $courseEnv->{pg}->{options}->{displayMode}; 143 my $redisplay = $r->param("redisplay"); 144 my $submitAnswers = $r->param("submitAnswers"); 145 my $checkAnswers = $r->param("checkAnswers"); 146 my $previewAnswers = $r->param("previewAnswers"); 147 148 # fields which may be defined when using Problem Editor 149 #my $override_seed = ($permissionLevel>=10) ? $r->param('problemSeed') : undef; 150 #my $override_problem_source = ($permissionLevel>=10) ? $r->param('sourceFilePath') : undef; 151 #my $editMode = undef; 152 #my $submit_button = $r->param('submit_button'); 153 #if ( defined($submit_button ) ) { 154 # $editMode = "temporaryFile" if $submit_button eq 'Refresh'; 155 # $editMode = 'savedFile' if $submit_button eq 'Save'; 156 #} 157 # 158 ##override using the source file data from the form field 159 #$problem->source_file($override_problem_source) if defined($override_problem_source); 160 #$problem->problem_seed($override_seed) if defined($override_seed); 161 # 162 ## store path to source file for title. 163 #$self->{problem_source_name} = $problem->source_file; 164 #$self->{edit_mode} = $editMode; 165 #$self->{current_problem_source} = (defined($override_problem_source) ) ? 166 167 # coerce form fields into CGI::Vars format 168 my $formFields = { WeBWorK::Form->new_from_paramable($r)->Vars }; 169 170 $self->{displayMode} = $displayMode; 171 $self->{redisplay} = $redisplay; 172 $self->{submitAnswers} = $submitAnswers; 173 $self->{checkAnswers} = $checkAnswers; 174 $self->{previewAnswers} = $previewAnswers; 175 $self->{formFields} = $formFields; 176 177 ##### permissions ##### 178 179 # are we allowed to view this problem? 180 $self->{isOpen} = time >= $set->open_date || $permissionLevel > 0; 181 return unless $self->{isOpen}; 182 183 # what does the user want to do? 184 my %want = ( 185 showOldAnswers => $r->param("showOldAnswers") || $courseEnv->{pg}->{options}->{showOldAnswers}, 186 showCorrectAnswers => $r->param("showCorrectAnswers") || $courseEnv->{pg}->{options}->{showCorrectAnswers}, 187 showHints => $r->param("showHints") || $courseEnv->{pg}->{options}->{showHints}, 188 showSolutions => $r->param("showSolutions") || $courseEnv->{pg}->{options}->{showSolutions}, 189 recordAnswers => $submitAnswers, 190 checkAnswers => $checkAnswers, 191 ); 192 193 # are certain options enforced? 194 my %must = ( 195 showOldAnswers => 0, 196 showCorrectAnswers => 0, 197 showHints => 0, 198 showSolutions => 0, 199 recordAnswers => mustRecordAnswers($permissionLevel), 200 checkAnswers => 0, 201 ); 202 203 # does the user have permission to use certain options? 204 my %can = ( 205 showOldAnswers => 1, 206 showCorrectAnswers => canShowCorrectAnswers($permissionLevel, $set->answer_date), 207 showHints => 1, 208 showSolutions => canShowSolutions($permissionLevel, $set->answer_date), 209 recordAnswers => canRecordAnswers($permissionLevel, $set->open_date, $set->due_date, 210 $problem->max_attempts, $problem->num_correct + $problem->num_incorrect + 1), 211 # attempts=num_correct+num_incorrect+1, as this happens before updating $problem 212 checkAnswers => canCheckAnswers($permissionLevel, $set->answer_date), 213 ); 214 # more complicated logic for showing check answer button: 215 # checkAnswers button shows up after due date -- once a student can't record anymore 216 # checkAnswers button always shows up when an instructor or TA is acting 217 # as someone else (the $user and $effectiveUserName aren't the same). 218 $can{checkAnswers} = ($can{checkAnswers} && not $can{recordAnswers} ) || 219 ( $permissionLevel >= 5 and 220 defined($userName) and defined($effectiveUserName) and 221 ($userName ne $effectiveUserName) 222 ); 223 224 225 # final values for options 226 my %will; 227 foreach (keys %must) { 228 $will{$_} = $can{$_} && ($want{$_} || $must{$_}); 229 } 230 231 ##### sticky answers ##### 232 233 if (not ($submitAnswers or $previewAnswers or $checkAnswers) and $will{showOldAnswers}) { 234 # do this only if new answers are NOT being submitted 235 my %oldAnswers = decodeAnswers($problem->last_answer); 236 $formFields->{$_} = $oldAnswers{$_} foreach keys %oldAnswers; 237 } 238 239 ##### translation ##### 240 241 $WeBWorK::timer0->continue("begin pg processing") if $timer0_ON; 242 my $pg = WeBWorK::PG->new( 243 $courseEnv, 244 $effectiveUser, 245 $key, 246 $set, 247 $problem, 248 $set->psvn, # FIXME: this field should be removed 249 $formFields, 250 { # translation options 251 displayMode => $displayMode, 252 showHints => $will{showHints}, 253 showSolutions => $will{showSolutions}, 254 refreshMath2img => $will{showHints} || $will{showSolutions}, 255 processAnswers => 1, 256 }, 257 ); 258 259 $WeBWorK::timer0->continue("end pg processing") if $timer0_ON; 260 ##### fix hint/solution options ##### 261 262 $can{showHints} &&= $pg->{flags}->{hintExists}; 263 $can{showSolutions} &&= $pg->{flags}->{solutionExists}; 264 265 ##### store fields ##### 266 267 $self->{want} = \%want; 268 $self->{must} = \%must; 269 $self->{can} = \%can; 270 $self->{will} = \%will; 271 272 $self->{pg} = $pg; 273 } 274 275 #sub if_warnings($$) { 276 # my ($self, $arg) = @_; 277 # return 0 unless $self->{isOpen}; 278 # return $self->{pg}->{warnings} ne ""; 279 #} 280 281 sub if_errors($$) { 282 my ($self, $arg) = @_; 283 return 0 unless $self->{isOpen}; 284 return $self->{pg}->{flags}->{error_flag}; 285 } 286 287 sub head { 288 my $self = shift; 289 return "" unless $self->{isOpen}; 290 return $self->{pg}->{head_text} if $self->{pg}->{head_text}; 291 } 292 293 sub options { 294 my $self = shift; 295 return join("", 296 CGI::start_form("POST", $self->{r}->uri), 297 $self->hidden_authen_fields, 298 CGI::hr(), 299 CGI::start_div({class=>"viewOptions"}), 300 $self->viewOptions(), 301 CGI::end_div(), 302 CGI::end_form() 303 ); 304 } 305 306 sub path { 307 my $self = shift; 308 my $args = $_[-1]; 309 my $setName = $self->{set}->set_id; 310 my $problemNumber = $self->{problem}->problem_id; 311 312 my $ce = $self->{ce}; 313 my $root = $ce->{webworkURLs}->{root}; 314 my $courseName = $ce->{courseName}; 315 return $self->pathMacro($args, 316 "Home" => "$root", 317 $courseName => "$root/$courseName", 318 $setName => "$root/$courseName/$setName", 319 "Problem $problemNumber" => "", 320 ); 321 } 322 323 sub siblings { 324 my $self = shift; 325 my $setName = $self->{set}->set_id; 326 my $problemNumber = $self->{problem}->problem_id; 327 328 my $ce = $self->{ce}; 329 my $db = $self->{db}; 330 my $root = $ce->{webworkURLs}->{root}; 331 my $courseName = $ce->{courseName}; 332 print CGI::strong("Problems"), CGI::br(); 333 334 my $effectiveUser = $self->{r}->param("effectiveUser"); 335 my @problemIDs = $db->listUserProblems($effectiveUser, $setName); 336 foreach my $problem (sort { $a <=> $b } @problemIDs) { 337 print ' '.CGI::a({-href=>"$root/$courseName/$setName/".$problem."/?" 338 . $self->url_authen_args . "&displayMode=" . $self->{displayMode}}, 339 "Problem ".$problem), CGI::br(); 340 } 341 342 return ""; 343 } 344 345 sub nav { 346 $WeBWorK::timer0->continue("begin nav subroutine") if $timer0_ON; 347 my $self = shift; 348 my $args = $_[-1]; 349 my $setName = $self->{set}->set_id; 350 my $problemNumber = $self->{problem}->problem_id; 351 352 my $ce = $self->{ce}; 353 my $db = $self->{db}; 354 my $root = $ce->{webworkURLs}->{root}; 355 my $courseName = $ce->{courseName}; 356 357 my $wwdb = $self->{wwdb}; 358 my $effectiveUser = $self->{r}->param("effectiveUser"); 359 my $tail = "&displayMode=".$self->{displayMode}; 360 361 my @links = ("Problem List" , "$root/$courseName/$setName", "navProbList"); 362 363 my @problemIDs = $db->listUserProblems($effectiveUser, $setName); 364 my ($prevID, $nextID); 365 foreach my $id (@problemIDs) { 366 $prevID = $id if $id < $problemNumber 367 and (not defined $prevID or $id > $prevID); 368 $nextID = $id if $id > $problemNumber 369 and (not defined $nextID or $id < $nextID); 370 } 371 unshift @links, "Previous Problem" , ($prevID 372 ? "$root/$courseName/$setName/".$prevID 373 : "") , "navPrev"; 374 push @links, "Next Problem" , ($nextID 375 ? "$root/$courseName/$setName/".$nextID 376 : "") , "navNext"; 377 378 my $result = $self->navMacro($args, $tail, @links); 379 $WeBWorK::timer0->continue("end nav subroutine") if $timer0_ON; 380 return $result; 381 } 382 383 sub title { 384 my $self = shift; 385 my $setName = $self->{set}->set_id; 386 my $problemNumber = $self->{problem}->problem_id; 387 388 return "$setName : Problem $problemNumber"; 389 } 390 391 sub body { 392 my $self = shift; 393 394 return CGI::p(CGI::font({-color=>"red"}, "This problem is not available because the problem set that contains it is not yet open.")) 395 unless $self->{isOpen}; 396 397 # unpack some useful variables 398 my $r = $self->{r}; 399 my $db = $self->{db}; 400 my $set = $self->{set}; 401 my $problem = $self->{problem}; 402 my $editMode = $self->{editMode}; 403 my $permissionLevel = $self->{permissionLevel}; 404 my $submitAnswers = $self->{submitAnswers}; 405 my $checkAnswers = $self->{checkAnswers}; 406 my $previewAnswers = $self->{previewAnswers}; 407 my %want = %{ $self->{want} }; 408 my %can = %{ $self->{can} }; 409 my %must = %{ $self->{must} }; 410 my %will = %{ $self->{will} }; 411 my $pg = $self->{pg}; 412 413 ##### translation errors? ##### 414 415 if ($pg->{flags}->{error_flag}) { 416 return $self->errorOutput($pg->{errors}, $pg->{body_text}); 417 } 418 419 ##### answer processing ##### 420 $WeBWorK::timer0->continue("begin answer processing") if $timer0_ON; 421 # if answers were submitted: 422 my $scoreRecordedMessage; 423 if ($submitAnswers) { 424 # get a "pure" (unmerged) UserProblem to modify 425 # this will be undefined if the problem has not been assigned to this user 426 my $pureProblem = $db->getUserProblem($problem->user_id, $problem->set_id, $problem->problem_id); 427 if (defined $pureProblem) { 428 # store answers in DB for sticky answers 429 my %answersToStore; 430 my %answerHash = %{ $pg->{answers} }; 431 $answersToStore{$_} = $answerHash{$_}->{original_student_ans} 432 foreach (keys %answerHash); 433 my $answerString = encodeAnswers(%answersToStore, 434 @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }); 435 436 # store last answer to database 437 $problem->last_answer($answerString); 438 $pureProblem->last_answer($answerString); 439 $db->putUserProblem($pureProblem); 440 441 # store state in DB if it makes sense 442 if ($will{recordAnswers}) { 443 $problem->status($pg->{state}->{recorded_score}); 444 $problem->attempted(1); 445 $problem->num_correct($pg->{state}->{num_of_correct_ans}); 446 $problem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 447 $pureProblem->status($pg->{state}->{recorded_score}); 448 $pureProblem->attempted(1); 449 $pureProblem->num_correct($pg->{state}->{num_of_correct_ans}); 450 $pureProblem->num_incorrect($pg->{state}->{num_of_incorrect_ans}); 451 if ($db->putUserProblem($pureProblem)) { 452 $scoreRecordedMessage = "Your score was recorded."; 453 } else { 454 $scoreRecordedMessage = "Your score was not recorded because there was a failure in storing the problem record to the database."; 455 } 456 # write to the transaction log, just to make sure 457 writeLog($self->{ce}, "transaction", 458 $problem->problem_id."\t". 459 $problem->set_id."\t". 460 $problem->user_id."\t". 461 $problem->source_file."\t". 462 $problem->value."\t". 463 $problem->max_attempts."\t". 464 $problem->problem_seed."\t". 465 $pureProblem->status."\t". 466 $pureProblem->attempted."\t". 467 $pureProblem->last_answer."\t". 468 $pureProblem->num_correct."\t". 469 $pureProblem->num_incorrect 470 ); 471 } else { 472 if (time < $set->open_date or time > $set->due_date) { 473 $scoreRecordedMessage = "Your score was not recorded because this problem set is closed."; 474 } else { 475 $scoreRecordedMessage = "Your score was not recorded."; 476 } 477 } 478 } else { 479 $scoreRecordedMessage = "Your score was not recorded because this problem has not been built for you."; 480 } 481 } 482 483 # logging student answers 484 485 my $answer_log = $self->{ce}->{courseFiles}->{logs}->{'answer_log'}; 486 if ( defined($answer_log )) { 487 if ($submitAnswers ) { 488 my $answerString = ""; 489 my %answerHash = %{ $pg->{answers} }; 490 $answerString = $answerString . $answerHash{$_}->{original_student_ans}."\t" 491 foreach (sort keys %answerHash); 492 $answerString = '' unless defined($answerString); # insure string is defined. 493 writeCourseLog($self->{ce}, "answer_log", 494 join("", 495 '|', $problem->user_id, 496 '|', $problem->set_id, 497 '|', $problem->problem_id, 498 '|',"\t", 499 time(),"\t", 500 $answerString, 501 ), 502 ); 503 504 } 505 } 506 507 $WeBWorK::timer0->continue("end answer processing") if $timer0_ON; 508 509 ##### output ##### 510 511 print CGI::start_div({class=>"problemHeader"}); 512 513 # custom message for editor 514 if ($permissionLevel >= 10 and defined $editMode) { 515 if ($editMode eq "temporaryFile") { 516 print CGI::p(CGI::i("Editing temporary file: ", $problem->source_file)); 517 } elsif ($editMode eq "savedFile") { 518 print CGI::p(CGI::i("Problem saved to: ", $problem->source_file)); 519 } 520 } 521 522 # attempt summary 523 #FIXME -- the following is a kludge: if showPartialCorrectAnswers is negative don't show anything. 524 # until after the due date 525 if (($pg->{flags}->{showPartialCorrectAnswers}>= 0 and $submitAnswers) or $will{showCorrectAnswers}) { 526 # print this if user submitted answers OR requested correct answers 527 528 print $self->attemptResults($pg, $submitAnswers, 529 $will{showCorrectAnswers}, 530 $pg->{flags}->{showPartialCorrectAnswers}, 1, 1); 531 } elsif ($checkAnswers) { 532 # print this if user previewed answers 533 print "ANSWERS ONLY CHECKED -- ",CGI::br(),"ANSWERS NOT RECORDED", CGI::br(); 534 print $self->attemptResults($pg, 1, 0, 1, 1, 1); 535 # show attempt answers 536 # don't show correct answers 537 # show attempt results (correctness) 538 # don't show attempt previews 539 } elsif ($previewAnswers) { 540 # print this if user previewed answers 541 print "PREVIEW ONLY -- NOT RECORDED",CGI::br(),$self->attemptResults($pg, 1, 0, 0, 0, 1); 542 # show attempt answers 543 # don't show correct answers 544 # don't show attempt results (correctness) 545 # show attempt previews 546 } 547 548 print CGI::end_div(); 549 550 print CGI::start_div({class=>"problem"}); 551 552 # main form 553 print 554 CGI::startform("POST", $r->uri), 555 $self->hidden_authen_fields, 556 CGI::p($pg->{body_text}), 557 CGI::p($pg->{result}->{msg} ? CGI::b("Note: ") : "", CGI::i($pg->{result}->{msg})), 558 CGI::p( 559 ($can{showCorrectAnswers} 560 ? CGI::checkbox( 561 -name => "showCorrectAnswers", 562 -checked => $will{showCorrectAnswers}, 563 -label => "Show correct answers", 564 ) ." " 565 : "" ), 566 ($can{showHints} 567 ? CGI::checkbox( 568 -name => "showHints", 569 -checked => $will{showHints}, 570 -label => "Show Hints", 571 ) . " " 572 : " " ), 573 ($can{showSolutions} 574 ? CGI::checkbox( 575 -name => "showSolutions", 576 -checked => $will{showSolutions}, 577 -label => "Show Solutions", 578 ) . " " 579 : " " ),CGI::br(), 580 CGI::submit(-name=>"previewAnswers", 581 -label=>"Preview Answers"), 582 ($can{recordAnswers} 583 ? CGI::submit(-name=>"submitAnswers", 584 -label=>"Submit Answers") 585 : ""), 586 ( $can{checkAnswers} 587 ? CGI::submit(-name=>"checkAnswers", 588 -label=>"Check Answers") 589 : ""), 590 ); 591 print CGI::end_div(); 592 593 print CGI::start_div({class=>"scoreSummary"}); 594 595 # score summary 596 my $attempts = $problem->num_correct + $problem->num_incorrect; 597 my $attemptsNoun = $attempts != 1 ? "times" : "time"; 598 my $lastScore = sprintf("%.0f%%", $problem->status * 100); # Round to whole number 599 my ($attemptsLeft, $attemptsLeftNoun); 600 if ($problem->max_attempts == -1) { 601 # unlimited attempts 602 $attemptsLeft = "unlimited"; 603 $attemptsLeftNoun = "attempts"; 604 } else { 605 $attemptsLeft = $problem->max_attempts - $attempts; 606 $attemptsLeftNoun = $attemptsLeft == 1 ? "attempt" : "attempts"; 607 } 608 609 my $setClosed = 0; 610 my $setClosedMessage; 611 if (time < $set->open_date or time > $set->due_date) { 612 $setClosed = 1; 613 $setClosedMessage = "This problem set is closed."; 614 if ($permissionLevel > 0) { 615 $setClosedMessage .= " However, since you are a privileged user, additional attempts will be recorded."; 616 } else { 617 $setClosedMessage .= " Additional attempts will not be recorded."; 618 } 619 } 620 print CGI::p( 621 $submitAnswers ? $scoreRecordedMessage . CGI::br() : "", 622 "You have attempted this problem $attempts $attemptsNoun.", CGI::br(), 623 $problem->attempted 624 ? "Your recorded score is $lastScore." . CGI::br() 625 : "", 626 $setClosed ? $setClosedMessage : "You have $attemptsLeft $attemptsLeftNoun remaining." 627 ); 628 print CGI::end_div(); 629 630 # save state for viewOptions 631 print CGI::hidden( 632 -name => "showOldAnswers", 633 -value => $will{showOldAnswers} 634 ), 635 636 CGI::hidden( 637 -name => "displayMode", 638 -value => $self->{displayMode} 639 ); 640 641 # end of main form 642 print CGI::endform(); 643 644 # stuff we need below (pull these out at the beginning?) 645 my $ce = $self->{ce}; 646 my $root = $ce->{webworkURLs}->{root}; 647 my $courseName = $ce->{courseName}; 648 649 print CGI::start_div({class=>"problemFooter"}); 650 651 # arguments for answer inspection button 652 my $prof_url = $ce->{webworkURLs}->{oldProf}; 653 my $webworkURL = $ce->{webworkURLs}->{root}; 654 my $cgi_url = $prof_url; 655 $cgi_url=~ s|/[^/]*$||; # clip profLogin.pl 656 my $authen_args = $self->url_authen_args(); 657 my $showPastAnswersURL = "$webworkURL/$courseName/instructor/show_answers/"; 658 659 # print answer inspection button 660 if ($self->{permissionLevel} > 0) { 661 print "\n", 662 CGI::start_form(-method=>"POST",-action=>$showPastAnswersURL,-target=>"information"),"\n", 663 $self->hidden_authen_fields,"\n", 664 CGI::hidden(-name => 'course', -value=>$courseName), "\n", 665 CGI::hidden(-name => 'problemNumber', -value=>$problem->problem_id), "\n", 666 CGI::hidden(-name => 'setName', -value=>$problem->set_id), "\n", 667 CGI::hidden(-name => 'studentUser', -value=>$problem->user_id), "\n", 668 CGI::p( {-align=>"left"}, 669 CGI::submit(-name => 'action', -value=>'Show Past Answers') 670 ), "\n", 671 CGI::endform(); 672 } 673 674 #print CGI::end_div(); 675 # 676 #print CGI::start_div(); 677 678 # arguments for feedback form 679 my $feedbackURL = "$root/$courseName/feedback/"; 680 681 #print feedback form 682 print 683 CGI::start_form(-method=>"POST", -action=>$feedbackURL),"\n", 684 $self->hidden_authen_fields,"\n", 685 CGI::hidden("module", __PACKAGE__),"\n", 686 CGI::hidden("set", $set->set_id),"\n", 687 CGI::hidden("problem", $problem->problem_id),"\n", 688 CGI::hidden("displayMode", $self->{displayMode}),"\n", 689 CGI::hidden("showOldAnswers", $will{showOldAnswers}),"\n", 690 CGI::hidden("showCorrectAnswers", $will{showCorrectAnswers}),"\n", 691 CGI::hidden("showHints", $will{showHints}),"\n", 692 CGI::hidden("showSolutions", $will{showSolutions}),"\n", 693 CGI::p({-align=>"left"}, 694 CGI::submit(-name=>"feedbackForm", -label=>"Email instructor") 695 ), 696 CGI::endform(),"\n"; 697 698 # FIXME print editor link 699 # print editor link if the user is an instructor AND the file is not in temporary editing mode 700 if ($self->{permissionLevel}>=10 and ( (not defined($self->{edit_mode})) or $self->{edit_mode} eq 'savedFile') ) { 701 print CGI::a({-href=>$ce->{webworkURLs}->{root}."/$courseName/instructor/pgProblemEditor/".$set->set_id. 702 '/'.$problem->problem_id.'?'.$self->url_authen_args},'Edit this problem'); 703 } 704 705 print CGI::end_div(); 706 707 # warning output 708 #if ($pg->{warnings} ne "") { 709 # print CGI::hr(), $self->warningOutput($pg->{warnings}); 710 #} 711 712 # debugging stuff 713 if (0) { 714 print 715 CGI::hr(), 716 CGI::h2("debugging information"), 717 CGI::h3("form fields"), 718 ref2string($self->{formFields}), 719 CGI::h3("user object"), 720 ref2string($self->{user}), 721 CGI::h3("set object"), 722 ref2string($set), 723 CGI::h3("problem object"), 724 ref2string($problem), 725 CGI::h3("PG object"), 726 ref2string($pg, {'WeBWorK::PG::Translator' => 1}); 727 } 728 729 return ""; 730 } 731 732 ##### output utilities ##### 733 734 sub attemptResults($$$$$$) { 735 my $self = shift; 736 my $pg = shift; 737 my $showAttemptAnswers = shift; 738 my $showCorrectAnswers = shift; 739 my $showAttemptResults = $showAttemptAnswers && shift; 740 my $showSummary = shift; 741 my $showAttemptPreview = shift || 0; 742 my $ce = $self->{ce}; 743 my $problemResult = $pg->{result}; # the overall result of the problem 744 my @answerNames = @{ $pg->{flags}->{ANSWER_ENTRY_ORDER} }; 745 746 my $showMessages = $showAttemptAnswers && grep { $pg->{answers}->{$_}->{ans_message} } @answerNames; 747 748 my $basename = "equation-" . $self->{set}->psvn. "." . $self->{problem}->problem_id . "-preview"; 749 my $imgGen = WeBWorK::PG::ImageGenerator->new( 750 tempDir => $ce->{webworkDirs}->{tmp}, 751 dir => $ce->{courseDirs}->{html_temp}, 752 url => $ce->{courseURLs}->{html_temp}, 753 basename => $basename, 754 latex => $ce->{externalPrograms}->{latex}, 755 dvipng => $ce->{externalPrograms}->{dvipng}, 756 ); 757 758 my $header; 759 #$header .= CGI::th("Part"); 760 $header .= $showAttemptAnswers ? CGI::th("Entered") : ""; 761 $header .= $showAttemptPreview ? CGI::th("Answer Preview") : ""; 762 $header .= $showCorrectAnswers ? CGI::th("Correct") : ""; 763 $header .= $showAttemptResults ? CGI::th("Result") : ""; 764 $header .= $showMessages ? CGI::th("messages") : ""; 765 my @tableRows = ( $header ); 766 my $numCorrect; 767 foreach my $name (@answerNames) { 768 my $answerResult = $pg->{answers}->{$name}; 769 my $studentAnswer = $answerResult->{student_ans}; # original_student_ans 770 my $preview = ($showAttemptPreview 771 ? $self->previewAnswer($answerResult, $imgGen) 772 : ""); 773 my $correctAnswer = $answerResult->{correct_ans}; 774 my $answerScore = $answerResult->{score}; 775 my $answerMessage = $showMessages ? $answerResult->{ans_message} : ""; 776 #FIXME --Can we be sure that $answerScore is an integer-- could the problem give partial credit? 777 $numCorrect += $answerScore > 0; 778 my $resultString = $answerScore ? "correct" : "incorrect"; 779 780 # get rid of the goofy prefix on the answer names (supposedly, the format 781 # of the answer names is changeable. this only fixes it for "AnSwEr" 782 #$name =~ s/^AnSwEr//; 783 784 my $row; 785 #$row .= CGI::td($name); 786 $row .= $showAttemptAnswers ? CGI::td(nbsp($studentAnswer)) : ""; 787 $row .= $showAttemptPreview ? CGI::td(nbsp($preview)) : ""; 788 $row .= $showCorrectAnswers ? CGI::td(nbsp($correctAnswer)) : ""; 789 $row .= $showAttemptResults ? CGI::td(nbsp($resultString)) : ""; 790 $row .= $answerMessage ? CGI::td(nbsp($answerMessage)) : ""; 791 push @tableRows, $row; 792 } 793 794 # render equation images 795 $imgGen->render(refresh => 1); 796 797 # my $numIncorrectNoun = scalar @answerNames == 1 ? "question" : "questions"; 798 my $scorePercent = sprintf("%.0f%%", $problemResult->{score} * 100); 799 # FIXME -- I left the old code in in case we have to back out. 800 # my $summary = "On this attempt, you answered $numCorrect out of " 801 # . scalar @answerNames . " $numIncorrectNoun correct, for a score of $scorePercent."; 802 my $summary = ""; 803 if (scalar @answerNames == 1) { 804 if ($numCorrect == scalar @answerNames) { 805 $summary .= "The above answer is correct."; 806 } else { 807 $summary .= "The above answer is NOT correct."; 808 } 809 } else { 810 if ($numCorrect == scalar @answerNames) { 811 $summary .= "All of the above answers are correct."; 812 } else { 813 $summary .= "At least one of the above answers is NOT correct."; 814 } 815 } 816 return CGI::table({-class=>"attemptResults"}, CGI::Tr(\@tableRows)) . ($showSummary ? CGI::p({class=>'emphasis'},$summary) : ""); 817 } 818 sub nbsp { 819 my $str = shift; 820 ($str =~/\S/) ? $str : ' ' ; # returns non-breaking space for empty strings 821 # tricky cases: $str =0; 822 # $str is a complex number 823 } 824 sub viewOptions($) { 825 my $self = shift; 826 my $displayMode = $self->{displayMode}; 827 my %must = %{ $self->{must} }; 828 my %can = %{ $self->{can} }; 829 my %will = %{ $self->{will} }; 830 831 my $optionLine; 832 $can{showOldAnswers} and $optionLine .= join "", 833 "Show: ".CGI::br(), 834 CGI::checkbox( 835 -name => "showOldAnswers", 836 -checked => $will{showOldAnswers}, 837 -label => "Saved answers", 838 ), " ".CGI::br(); 839 840 $optionLine and $optionLine .= join "", CGI::br(); 841 842 return CGI::div({-style=>"border: thin groove; padding: 1ex; margin: 2ex align: left"}, 843 "View equations as: ".CGI::br(), 844 CGI::radio_group( 845 -name => "displayMode", 846 -values => ['plainText', 'formattedText', 'images'], 847 -default => $displayMode, 848 -linebreak=>'true', 849 -labels => { 850 plainText => "plain", 851 formattedText => "formatted", 852 images => "images", 853 } 854 ), CGI::br(),CGI::hr(), 855 $optionLine, 856 CGI::submit(-name=>"redisplay", -label=>"Save Options"), 857 ); 858 } 859 860 sub previewAnswer($$) { 861 my ($self, $answerResult, $imgGen) = @_; 862 my $ce = $self->{ce}; 863 my $effectiveUser = $self->{effectiveUser}; 864 my $set = $self->{set}; 865 my $problem = $self->{problem}; 866 my $displayMode = $self->{displayMode}; 867 868 # note: right now, we have to do things completely differently when we are 869 # rendering math from INSIDE the translator and from OUTSIDE the translator. 870 # so we'll just deal with each case explicitly here. there's some code 871 # duplication that can be dealt with later by abstracting out tth/dvipng/etc. 872 873 my $tex = $answerResult->{preview_latex_string}; 874 875 return "" unless defined $tex and $tex ne ""; 876 877 if ($displayMode eq "plainText") { 878 return $tex; 879 } elsif ($displayMode eq "formattedText") { 880 my $tthCommand = $ce->{externalPrograms}->{tth} 881 . " -L -f5 -r 2> /dev/null <<END_OF_INPUT; echo > /dev/null\n" 882 . "\\(".$tex."\\)\n" 883 . "END_OF_INPUT\n"; 884 885 # call tth 886 my $result = `$tthCommand`; 887 if ($?) { 888 return "<b>[tth failed: $? $@]</b>"; 889 } 890 return $result; 891 } elsif ($displayMode eq "images") { 892 ## how are we going to name this? 893 #my $targetPathCommon = "/m2i/" 894 # . $effectiveUser->user_id . "." 895 # . $set->set_id . "." 896 # . $problem->problem_id . "." 897 # . $answerResult->{ans_name} . ".png"; 898 # 899 ## figure out where to put things 900 #my $wd = makeTempDirectory($ce->{courseDirs}->{html_temp}, "webwork-dvipng"); 901 #my $latex = $ce->{externalPrograms}->{latex}; 902 #my $dvipng = $ce->{externalPrograms}->{dvipng}; 903 #my $targetPath = $ce->{courseDirs}->{html_temp} . $targetPathCommon; 904 # # should use surePathToTmpFile, but we have to 905 # # isolate it from the problem enivronment first 906 #my $targetURL = $ce->{courseURLs}->{html_temp} . $targetPathCommon; 907 # 908 ## call dvipng to generate a preview 909 #dvipng($wd, $latex, $dvipng, $tex, $targetPath); 910 #rmtree($wd, 0, 0); 911 #if (-e $targetPath) { 912 # return "<img src=\"$targetURL\" alt=\"$tex\" />"; 913 #} else { 914 # return "<b>[math2img failed]</b>"; 915 #} 916 $imgGen->add($answerResult->{preview_latex_string}); 917 918 } 919 } 920 921 ##### logging subroutine #### 922 923 924 925 ##### permission queries ##### 926 927 # this stuff should be abstracted out into the permissions system 928 # however, the permission system only knows about things in the 929 # course environment and the username. hmmm... 930 931 # also, i should fix these so that they have a consistent calling 932 # format -- perhaps: 933 # canPERM($courseEnv, $user, $set, $problem, $permissionLevel) 934 935 sub canShowCorrectAnswers($$) { 936 my ($permissionLevel, $answerDate) = @_; 937 return $permissionLevel > 0 || time > $answerDate; 938 } 939 940 sub canShowSolutions($$) { 941 my ($permissionLevel, $answerDate) = @_; 942 return canShowCorrectAnswers($permissionLevel, $answerDate); 943 } 944 945 sub canRecordAnswers($$$$$) { 946 my ($permissionLevel, $openDate, $dueDate, $maxAttempts, $attempts) = @_; 947 my $permHigh = $permissionLevel > 0; 948 my $timeOK = time >= $openDate && time <= $dueDate; 949 my $attemptsOK = $maxAttempts == -1 || $attempts <= $maxAttempts; 950 my $recordAnswers = $permHigh || ($timeOK && $attemptsOK); 951 return $recordAnswers; 952 } 953 954 sub canCheckAnswers($$) { 955 my ($permissionLevel, $answerDate) = @_; 956 my $permHigh = $permissionLevel > 0; 957 my $timeOK = time >= $answerDate; 958 my $recordAnswers = $permHigh || $timeOK; 959 return $recordAnswers; 960 } 961 962 sub mustRecordAnswers($) { 963 my ($permissionLevel) = @_; 964 return $permissionLevel == 0; 965 } 966 967 1;
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