loncom/homework/lonhomework.pm - view

File: [LON-CAPA] / loncom / homework / lonhomework.pm
Revision 1.314: download - view: text, annotated - select for diffs
Fri Jul 3 14:52:47 2009 UTC (14 years, 10 months ago) by bisitz
Branches: MAIN
CVS tags: HEAD

- Use new Box style for problem template list
  (not so) quick and (not so) dirty solution: way of building categories and two columns should be revisited.
- Corrected nested tags issue (a / font)
- Replaced font tag by style
- XHTML: Replaced "<p><form..." by "<div></form..."
- Corrected unbalanced tags (added missing <div>)
- Use info style for info message about what to do

1: # The LearningOnline Network with CAPA 2: # The LON-CAPA Homework handler 3: # 4: # $Id: lonhomework.pm,v 1.314 2009/07/03 14:52:47 bisitz Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: 28: 29: package Apache::lonhomework; 30: use strict; 31: use Apache::style(); 32: use Apache::lonxml(); 33: use Apache::lonnet; 34: use Apache::lonplot(); 35: use Apache::inputtags(); 36: use Apache::structuretags(); 37: use Apache::randomlabel(); 38: use Apache::response(); 39: use Apache::hint(); 40: use Apache::outputtags(); 41: use Apache::caparesponse(); 42: use Apache::radiobuttonresponse(); 43: use Apache::optionresponse(); 44: use Apache::imageresponse(); 45: use Apache::essayresponse(); 46: use Apache::externalresponse(); 47: use Apache::rankresponse(); 48: use Apache::matchresponse(); 49: use Apache::chemresponse(); 50: use Apache::drawimage(); 51: use Apache::Constants qw(:common); 52: use Apache::loncommon(); 53: use Apache::lonlocal; 54: use Time::HiRes qw( gettimeofday tv_interval ); 55: use HTML::Entities(); 56: use File::Copy(); 57: 58: # FIXME - improve commenting 59: 60: 61: BEGIN { 62: &Apache::lonxml::register_insert(); 63: } 64: 65: 66: =pod 67: 68: =item set_bubble_lines() 69: 70: Called at analysis time to set the bubble lines 71: hash for the problem.. This should be called in the 72: end_problemtype tag in analysis mode. 73: 74: We fetch the hash of part id counters from lonxml 75: and push them into analyze:{part_id.bubble_lines}. 76: 77: =cut 78: 79: sub set_bubble_lines { 80: my %bubble_counters = &Apache::lonxml::get_bubble_line_hash(); 81: 82: foreach my $key (keys(%bubble_counters)) { 83: $Apache::lonhomework::analyze{"$key.bubble_lines"} = 84: $bubble_counters{"$key"}; 85: } 86: } 87: 88: # 89: # Decides what targets to render for. 90: # Implicit inputs: 91: # Various session environment variables: 92: # request.state - published - is a /res/ resource 93: # uploaded - is a /uploaded/ resource 94: # contruct - is a /priv/ resource 95: # form.grade_target - a form parameter requesting a specific target 96: sub get_target { 97: &Apache::lonxml::debug("request.state = $env{'request.state'}"); 98: if( defined($env{'form.grade_target'})) { 99: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}"); 100: } else { 101: &Apache::lonxml::debug("form.grade_target <undefined>"); 102: } 103: if (($env{'request.state'} eq "published") || 104: ($env{'request.state'} eq "uploaded")) { 105: if ( defined($env{'form.grade_target'} ) 106: && ($env{'form.grade_target'} eq 'tex')) { 107: return ($env{'form.grade_target'}); 108: } elsif ( defined($env{'form.grade_target'} ) 109: && ($Apache::lonhomework::viewgrades eq 'F' )) { 110: return ($env{'form.grade_target'}); 111: } elsif ( $env{'form.grade_target'} eq 'webgrade' 112: && ($Apache::lonhomework::queuegrade eq 'F' )) { 113: return ($env{'form.grade_target'}); 114: } 115: if ($env{'form.webgrade'} && 116: ($Apache::lonhomework::modifygrades eq 'F' 117: || $Apache::lonhomework::queuegrade eq 'F' )) { 118: return ('grade','webgrade'); 119: } 120: if ( defined($env{'form.submitted'}) && 121: ( !defined($env{'form.newrandomization'}))) { 122: return ('grade', 'web'); 123: } else { 124: return ('web'); 125: } 126: } elsif ($env{'request.state'} eq "construct") { 127: if ( defined($env{'form.grade_target'}) ) { 128: return ($env{'form.grade_target'}); 129: } 130: if ( defined($env{'form.preview'})) { 131: if ( defined($env{'form.submitted'})) { 132: return ('grade', 'web'); 133: } else { 134: return ('web'); 135: } 136: } else { 137: if ($env{'form.problemstate'} eq 'WEB_GRADE') { 138: #$env{'form.webgrade'} = 'yes'; 139: return ('grade','webgrade','answer'); 140: } elsif (($env{'form.problemmode'} eq 'view') || 141: ($env{'form.problemmode'} eq 'discard')) { 142: if ( defined($env{'form.submitted'}) && 143: (!defined($env{'form.resetdata'})) && 144: (!defined($env{'form.newrandomization'}))) { 145: return ('grade', 'web','answer'); 146: } else { 147: return ('web','answer'); 148: } 149: } elsif ($env{'form.problemmode'} eq 'edit') { 150: if ( $env{'form.submitted'} eq 'edit' ) { 151: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) { 152: return ('modified','web','answer'); 153: } else { 154: return ('modified','no_output_web','edit'); 155: } 156: } else { 157: return ('no_output_web','edit'); 158: } 159: } else { 160: return ('web'); 161: } 162: } 163: } 164: return (); 165: } 166: 167: sub setup_vars { 168: my ($target) = @_; 169: return ';' 170: # return ';$external::target='.$target.';'; 171: } 172: 173: sub createmenu { 174: my ($which,$request)=@_; 175: if ($which eq 'grade') { 176: $request->print('<script type="text/javascript" language="JavaScript"> 177: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote", 178: "height=350,width=150,menubar=no"); 179: </script>'); 180: } 181: } 182: 183: sub proctor_checked_in { 184: my ($slot_name,$slot,$type)=@_; 185: my @possible_proctors=split(",",$slot->{'proctor'}); 186: 187: return 1 if (!@possible_proctors); 188: 189: my $key; 190: if ($type eq 'Task') { 191: my $version=$Apache::lonhomework::history{'resource.0.version'}; 192: $key ="resource.$version.0.checkedin"; 193: } elsif ($type eq 'problem') { 194: $key ='resource.0.checkedin'; 195: } 196: # backward compatability, used to be username@domain, 197: # now is username:domain 198: my $who = $Apache::lonhomework::history{$key}; 199: if ($who !~ /:/) { 200: $who =~ tr/@/:/; 201: } 202: foreach my $possible (@possible_proctors) { 203: if ($who eq $possible 204: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) { 205: return 1; 206: } 207: } 208: 209: return 0; 210: } 211: 212: sub check_slot_access { 213: my ($id,$type)=@_; 214: 215: # does it pass normal muster 216: my ($status,$datemsg)=&check_access($id); 217: 218: my $useslots = &Apache::lonnet::EXT("resource.0.useslots"); 219: if ($useslots ne 'resource' && $useslots ne 'map' 220: && $useslots ne 'map_map') { 221: return ($status,$datemsg); 222: } 223: 224: if ($status eq 'SHOW_ANSWER' || 225: $status eq 'CLOSED' || 226: $status eq 'INVALID_ACCESS' || 227: $status eq 'UNAVAILABLE') { 228: return ($status,$datemsg); 229: } 230: if ($env{'request.state'} eq "construct") { 231: return ($status,$datemsg); 232: } 233: 234: if ($type eq 'Task') { 235: my $version=$Apache::lonhomework::history{'resource.version'}; 236: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} && 237: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') { 238: return ('SHOW_ANSWER'); 239: } 240: } 241: 242: my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent"); 243: my $available = &Apache::lonnet::EXT("resource.0.available"); 244: my @slots= (split(':',$availablestudent),split(':',$available)); 245: 246: # if (!@slots) { 247: # return ($status,$datemsg); 248: # } 249: my $slotstatus='NOT_IN_A_SLOT'; 250: my ($returned_slot,$slot_name); 251: foreach my $slot (@slots) { 252: $slot =~ s/(^\s*|\s*$)//g; 253: &Apache::lonxml::debug("getting $slot"); 254: my %slot=&Apache::lonnet::get_slot($slot); 255: &Apache::lonhomework::showhash(%slot); 256: if ($slot{'starttime'} < time && 257: $slot{'endtime'} > time && 258: &Apache::loncommon::check_ip_acc($slot{'ip'})) { 259: &Apache::lonxml::debug("$slot is good"); 260: $slotstatus='NEEDS_CHECKIN'; 261: $returned_slot=\%slot; 262: $slot_name=$slot; 263: last; 264: } 265: } 266: if ($slotstatus eq 'NEEDS_CHECKIN' && 267: &proctor_checked_in($slot_name,$returned_slot,$type)) { 268: &Apache::lonxml::debug("protoctor checked in"); 269: $slotstatus='CAN_ANSWER'; 270: } 271: 272: my ($is_correct,$got_grade,$checkedin); 273: if ($type eq 'Task') { 274: my $version=$Apache::lonhomework::history{'resource.0.version'}; 275: $got_grade = 276: ($Apache::lonhomework::history{"resource.$version.0.status"} 277: =~ /^(?:pass|fail)$/); 278: $is_correct = 279: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass' 280: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ ); 281: $checkedin = 282: $Apache::lonhomework::history{"resource.$version.0.checkedin"}; 283: } elsif ($type eq 'problem') { 284: $got_grade = 1; 285: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"}; 286: $is_correct = 287: ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/); 288: } 289: 290: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)"); 291: 292: # no slot is currently open, and has been checked in for this version 293: # but hasn't got a grade, therefore must be awaiting a grade 294: if (!defined($slot_name) 295: && $checkedin 296: && !$got_grade) { 297: return ('WAITING_FOR_GRADE'); 298: } 299: 300: # Previously used slot is no longer open, and has been checked in for this version. 301: # However, the problem is not closed, and potentially, another slot might be 302: # used to gain access to it to work on it, until the due date is reached, and the 303: # problem then becomes CLOSED. Therefore return the slotstatus - 304: # (which will be NOT_IN_SLOT). 305: if (!defined($slot_name) 306: && $checkedin 307: && $type eq 'problem') { 308: return ($slotstatus); 309: } 310: 311: if ($slotstatus eq 'NOT_IN_A_SLOT' 312: && $checkedin ) { 313: 314: if ($got_grade) { 315: return ('SHOW_ANSWER'); 316: } else { 317: return ('WAITING_FOR_GRADE'); 318: } 319: 320: } 321: 322: if ( $is_correct) { 323: if ($type eq 'problem') { 324: return ($status); 325: } 326: return ('SHOW_ANSWER'); 327: } 328: 329: if ( $status eq 'CANNOT_ANSWER' && 330: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) { 331: return ($status,$datemsg); 332: } 333: 334: return ($slotstatus,$datemsg,$slot_name,$returned_slot); 335: } 336: 337: # JB, 9/24/2002: Any changes in this function may require a change 338: # in lonnavmaps::resource::getDateStatus. 339: sub check_access { 340: my ($id) = @_; 341: my $date =''; 342: my $status; 343: my $datemsg = ''; 344: my $lastdate = ''; 345: my $type; 346: my $passed; 347: 348: if ($env{'request.state'} eq "construct") { 349: if ($env{'form.problemstate'}) { 350: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) { 351: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' 352: && &hide_problem_status())) { 353: return ('CANNOT_ANSWER', 354: &mt('is in this state due to author settings.')); 355: } 356: } else { 357: return ($env{'form.problemstate'}, 358: &mt('is in this state due to author settings.')); 359: } 360: } 361: &Apache::lonxml::debug("in construction ignoring dates"); 362: $status='CAN_ANSWER'; 363: $datemsg=&mt('is in under construction'); 364: # return ($status,$datemsg); 365: } 366: 367: &Apache::lonxml::debug("checking for part :$id:"); 368: &Apache::lonxml::debug("time:".time); 369: 370: my ($symb)=&Apache::lonnet::whichuser(); 371: &Apache::lonxml::debug("symb:".$symb); 372: #if ($env{'request.state'} ne "construct" && $symb ne '') { 373: if ($env{'request.state'} ne "construct") { 374: my $idacc = &Apache::lonnet::EXT("resource.$id.acc"); 375: my $allowed=&Apache::loncommon::check_ip_acc($idacc); 376: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) { 377: $status='INVALID_ACCESS'; 378: $date=&mt("can not be accessed from your location."); 379: return($status,$date); 380: } 381: 382: foreach my $temp ("opendate","duedate","answerdate") { 383: $lastdate = $date; 384: if ($temp eq 'duedate') { 385: $date = &due_date($id); 386: } else { 387: $date = &Apache::lonnet::EXT("resource.$id.$temp"); 388: } 389: 390: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type"); 391: if ($thistype =~ /^(con_lost|no_such_host)/ || 392: $date =~ /^(con_lost|no_such_host)/) { 393: $status='UNAVAILABLE'; 394: $date=&mt("may open later."); 395: return($status,$date); 396: } 397: if ($thistype eq 'date_interval') { 398: if ($temp eq 'opendate') { 399: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date; 400: } 401: if ($temp eq 'answerdate') { 402: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date; 403: } 404: } 405: &Apache::lonxml::debug("found :$date: for :$temp:"); 406: if ($date eq '') { 407: $date = &mt("an unknown date"); $passed = 0; 408: } elsif ($date eq 'con_lost') { 409: $date = &mt("an indeterminate date"); $passed = 0; 410: } else { 411: if (time < $date) { $passed = 0; } else { $passed = 1; } 412: $date = &Apache::lonlocal::locallocaltime($date); 413: } 414: if (!$passed) { $type=$temp; last; } 415: } 416: &Apache::lonxml::debug("have :$type:$passed:"); 417: if ($passed) { 418: $status='SHOW_ANSWER'; 419: $datemsg=$date; 420: } elsif ($type eq 'opendate') { 421: $status='CLOSED'; 422: $datemsg = &mt("will open on")." $date"; 423: } elsif ($type eq 'duedate') { 424: $status='CAN_ANSWER'; 425: $datemsg = &mt("is due at")." $date"; 426: } elsif ($type eq 'answerdate') { 427: $status='CLOSED'; 428: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date"; 429: } 430: } 431: if ($status eq 'CAN_ANSWER' || 432: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) { 433: #check #tries, and if correct. 434: my $tries = $Apache::lonhomework::history{"resource.$id.tries"}; 435: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries"); 436: if ( $tries eq '' ) { $tries = '0'; } 437: if ( $maxtries eq '' && 438: $env{'request.state'} ne 'construct') { $maxtries = '2'; } 439: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 440: # if (correct and show prob status) or excused then CANNOT_ANSWER 441: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/ 442: && 443: &show_problem_status()) 444: || 445: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) { 446: $status = 'CANNOT_ANSWER'; 447: } 448: if ($status eq 'CANNOT_ANSWER' 449: && &show_answer_problem_status()) { 450: $status = 'SHOW_ANSWER'; 451: } 452: } 453: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') { 454: my @interval=&Apache::lonnet::EXT("resource.$id.interval"); 455: &Apache::lonxml::debug("looking for interval @interval"); 456: if ($interval[0]) { 457: my $first_access=&Apache::lonnet::get_first_access($interval[1]); 458: &Apache::lonxml::debug("looking for accesstime $first_access"); 459: if (!$first_access) { 460: $status='NOT_YET_VIEWED'; 461: my $due_date = &due_date($id); 462: my $seconds_left = $due_date - time; 463: if ($seconds_left > $interval[0] || $due_date eq '') { 464: $seconds_left = $interval[0]; 465: } 466: $datemsg=&seconds_to_human_length($seconds_left); 467: } 468: } 469: } 470: 471: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') && 472: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) { 473: # return ('UNCHECKEDOUT','needs to be checked out'); 474: #} 475: 476: 477: &Apache::lonxml::debug("sending back :$status:$datemsg:"); 478: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) { 479: &Apache::lonxml::debug("should be allowed to browse a resource when closed"); 480: $status='CAN_ANSWER'; 481: $datemsg=&mt('is closed but you are allowed to view it'); 482: } 483: 484: return ($status,$datemsg); 485: } 486: # this should work exactly like the copy in lonnavmaps.pm 487: sub due_date { 488: my ($part_id,$symb,$udom,$uname)=@_; 489: my $date; 490: my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb, 491: $udom,$uname); 492: &Apache::lonxml::debug("looking for interval $part_id $symb @interval"); 493: my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb, 494: $udom,$uname); 495: &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date"); 496: if ($interval[0] =~ /\d+/) { 497: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb); 498: &Apache::lonxml::debug("looking for first_access $first_access ($interval[1])"); 499: if (defined($first_access)) { 500: my $interval = $first_access+$interval[0]; 501: $date = (!$due_date || $interval < $due_date) ? $interval 502: : $due_date; 503: } else { 504: $date = $due_date; 505: } 506: } else { 507: $date = $due_date; 508: } 509: return $date 510: } 511: 512: sub seconds_to_human_length { 513: my ($length)=@_; 514: 515: my $seconds=$length%60; $length=int($length/60); 516: my $minutes=$length%60; $length=int($length/60); 517: my $hours=$length%24; $length=int($length/24); 518: my $days=$length; 519: 520: my $timestr; 521: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); } 522: if ($hours > 0) { $timestr.=($timestr?", ":""). 523: &mt('[quant,_1,hour]',$hours); } 524: if ($minutes > 0) { $timestr.=($timestr?", ":""). 525: &mt('[quant,_1,minute]',$minutes); } 526: if ($seconds > 0) { $timestr.=($timestr?", ":""). 527: &mt('[quant,_1,second]',$seconds); } 528: return $timestr; 529: } 530: 531: sub showhash { 532: my (%hash) = @_; 533: &showhashsubset(\%hash,'.'); 534: return ''; 535: } 536: 537: sub showarray { 538: my ($array)=@_; 539: my $string="("; 540: foreach my $elm (@{ $array }) { 541: if (ref($elm) eq 'ARRAY') { 542: $string.=&showarray($elm); 543: } elsif (ref($elm) eq 'HASH') { 544: $string.= "HASH --- \n<br />"; 545: $string.= &showhashsubset($elm,'.'); 546: } else { 547: $string.="$elm," 548: } 549: } 550: chop($string); 551: $string.=")"; 552: return $string; 553: } 554: 555: sub showhashsubset { 556: my ($hash,$keyre) = @_; 557: my $resultkey; 558: foreach $resultkey (sort keys %$hash) { 559: if ($resultkey !~ /$keyre/) { next; } 560: if (ref($$hash{$resultkey}) eq 'ARRAY' ) { 561: &Apache::lonxml::debug("$resultkey ---- ". 562: &showarray($$hash{$resultkey})); 563: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) { 564: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}"); 565: &showhashsubset($$hash{$resultkey},'.'); 566: } else { 567: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}"); 568: } 569: } 570: &Apache::lonxml::debug("\n<br />restored values^</br>\n"); 571: return ''; 572: } 573: 574: sub setuppermissions { 575: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'}); 576: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}); 577: if (! $viewgrades && 578: exists($env{'request.course.sec'}) && 579: $env{'request.course.sec'} !~ /^\s*$/) { 580: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}. 581: '/'.$env{'request.course.sec'}); 582: } 583: $Apache::lonhomework::viewgrades = $viewgrades; 584: 585: if ($Apache::lonhomework::browse eq 'F' && 586: $env{'form.devalidatecourseresdata'} eq 'on') { 587: my (undef,$courseid) = &Apache::lonnet::whichuser(); 588: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"}, 589: $env{"course.$courseid.domain"}); 590: } 591: 592: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'}); 593: if (! $modifygrades && 594: exists($env{'request.course.sec'}) && 595: $env{'request.course.sec'} !~ /^\s*$/) { 596: $modifygrades = 597: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}. 598: '/'.$env{'request.course.sec'}); 599: } 600: $Apache::lonhomework::modifygrades = $modifygrades; 601: 602: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'}); 603: if (! $queuegrade && 604: exists($env{'request.course.sec'}) && 605: $env{'request.course.sec'} !~ /^\s*$/) { 606: $queuegrade = 607: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}. 608: '/'.$env{'request.course.sec'}); 609: } 610: $Apache::lonhomework::queuegrade = $queuegrade; 611: return ''; 612: } 613: 614: sub unset_permissions { 615: undef($Apache::lonhomework::queuegrade); 616: undef($Apache::lonhomework::modifygrades); 617: undef($Apache::lonhomework::viewgrades); 618: undef($Apache::lonhomework::browse); 619: } 620: 621: sub setupheader { 622: my $request=$_[0]; 623: &Apache::loncommon::content_type($request,'text/html'); 624: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) { 625: &Apache::loncommon::no_cache($request); 626: } 627: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri, 628: # 'lastrevisiondate')); 629: $request->send_http_header; 630: return OK if $request->header_only; 631: return '' 632: } 633: 634: sub handle_save_or_undo { 635: my ($request,$problem,$result) = @_; 636: my $file = &Apache::lonnet::filelocation("",$request->uri); 637: my $filebak =$file.".bak"; 638: my $filetmp =$file.".tmp"; 639: my $error=0; 640: if ($env{'form.Undo'} eq &mt('undo')) { 641: my $error=0; 642: if (!&File::Copy::copy($file,$filetmp)) { $error=1; } 643: if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; } 644: if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; } 645: if (!$error) { 646: &Apache::lonxml::info("<p><b>". 647: &mt("Undid changes, Switched [_1] and [_2]", 648: '<span class="LC_filename">'.$filebak. 649: '</span>', 650: '<span class="LC_filename">'.$file. 651: '</span>')."</b></p>"); 652: } else { 653: &Apache::lonxml::info("<p><span class=\"LC_error\">". 654: &mt("Unable to undo, unable to switch [_1] and [_2]", 655: '<span class="LC_filename">'. 656: $filebak.'</span>', 657: '<span class="LC_filename">'. 658: $file.'</span>')."</span></p>"); 659: $error=1; 660: } 661: } else { 662: &Apache::lonnet::correct_line_ends($result); 663: my $fs=Apache::File->new(">$filebak"); 664: if (defined($fs)) { 665: print $fs $$problem; 666: } else { 667: &Apache::lonxml::info("<span class=\"LC_error\">". 668: &mt("Unable to make backup [_1]", 669: '<span class="LC_filename">'. 670: $filebak.'</span>')."</span>"); 671: $error=2; 672: } 673: my $fh=Apache::File->new(">$file"); 674: if (defined($fh)) { 675: print $fh $$result; 676: } else { 677: &Apache::lonxml::info('<span class="LC_error">'. 678: &mt("Unable to write to [_1]", 679: '<span class="LC_filename">'. 680: $file.'</span>'). 681: '</span>'); 682: $error|=4; 683: } 684: } 685: return $error; 686: } 687: 688: sub analyze_header { 689: my ($request) = @_; 690: my $js = &Apache::structuretags::setmode_javascript(); 691: 692: # Breadcrumbs 693: my $brcrum = [{'href' => &Apache::loncommon::authorspace(), 694: 'text' => 'Construction Space'}, 695: {'href' => '', 696: 'text' => 'Problem Testing'}, 697: {'href' => '', 698: 'text' => 'Analyzing a problem'}]; 699: 700: my $result = 701: &Apache::loncommon::start_page('Analyzing a problem', 702: $js, 703: {'bread_crumbs' => $brcrum,}) 704: .&Apache::loncommon::head_subbox( 705: &Apache::loncommon::CSTR_pageheader()); 706: $result .= 707: &Apache::lonxml::message_location().' 708: <form name="lonhomework" method="post" action="'. 709: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'. 710: '<input type="hidden" name="problemmode" value="'. 711: $env{'form.problemmode'}.'" />'. 712: &Apache::structuretags::remember_problem_state().' 713: <div class="LC_edit_problem_analyze_header"> 714: <input type="button" name="submitmode" value="'.&mt("EditXML").'" '. 715: 'onclick="javascript:setmode(this.form,'."'editxml'".')" /> 716: <input type="button" name="submitmode" value="'.&mt('Edit').'" '. 717: 'onclick="javascript:setmode(this.form,'."'edit'".')" /> 718: <hr /> 719: <input type="button" name="submitmode" value="'.&mt("View").'" '. 720: 'onclick="javascript:setmode(this.form,'."'view'".')" /> 721: <hr /> 722: </div> 723: </form>'; 724: &Apache::lonxml::add_messages(\$result); 725: $request->print($result); 726: $request->rflush(); 727: } 728: 729: sub analyze_footer { 730: my ($request) = @_; 731: $request->print(&Apache::loncommon::end_page()); 732: $request->rflush(); 733: } 734: 735: sub analyze { 736: my ($request,$file) = @_; 737: &Apache::lonxml::debug("Analyze"); 738: my $result; 739: my %overall; 740: my %seedexample; 741: my %allparts; 742: my $rndseed=$env{'form.rndseed'}; 743: &analyze_header($request); 744: my %prog_state= 745: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'), 746: &mt('Getting Problem Variants'), 747: $env{'form.numtoanalyze'}, 748: 'inline',undef); 749: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) { 750: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state, 751: &mt('last problem')); 752: if (&Apache::loncommon::connection_aborted($request)) { return; } 753: my $thisseed=$i+$rndseed; 754: my $subresult=&Apache::lonnet::ssi($request->uri, 755: ('grade_target' => 'analyze'), 756: ('rndseed' => $thisseed)); 757: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2); 758: my %analyze=&Apache::lonnet::str2hash($subresult); 759: my @parts; 760: if (defined(@{ $analyze{'parts'} })) { 761: @parts=@{ $analyze{'parts'} }; 762: } 763: foreach my $part (@parts) { 764: if (!exists($allparts{$part})) {$allparts{$part}=1;}; 765: if ($analyze{$part.'.type'} eq 'numericalresponse' || 766: $analyze{$part.'.type'} eq 'stringresponse' || 767: $analyze{$part.'.type'} eq 'formularesponse' ) { 768: foreach my $name (keys(%{ $analyze{$part.'.answer'} })) { 769: my $i=0; 770: foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) { 771: push( @{ $overall{$part.'.answer'}[$i] }, 772: $answer_part); 773: my $concatanswer= join("\0",@{ $answer_part }); 774: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) { 775: $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>']; 776: } 777: $seedexample{join("\0",$part,$i,@{$answer_part})}= 778: $thisseed; 779: $i++; 780: } 781: } 782: if (!keys(%{ $analyze{$part.'.answer'} })) { 783: my $answer_part = 784: ['<span class="LC_error">'.&mt('Error').'</span>']; 785: $seedexample{join("\0",$part,0,@{$answer_part})}= 786: $thisseed; 787: push( @{ $overall{$part.'.answer'}[0] }, 788: $answer_part); 789: } 790: } 791: } 792: } 793: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state, 794: &mt('Analyzing Results')); 795: $request->print('<hr />' 796: .'<h3>' 797: .&mt('List of possible answers') 798: .'</h3>' 799: ); 800: foreach my $part (sort(keys(%allparts))) { 801: if (defined(@{ $overall{$part.'.answer'} })) { 802: for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) { 803: my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] }); 804: $request->print(&Apache::loncommon::start_data_table() 805: .&Apache::loncommon::start_data_table_header_row() 806: .'<th colspan="'.($num_cols+1).'">' 807: .&mt('Part').' '.$part 808: ); 809: if (scalar(@{ $overall{$part.'.answer'} }) > 1) { 810: $request->print(' '.&mt('Answer [_1]',$i+1)); 811: } 812: $request->print('</th>' 813: .&Apache::loncommon::end_data_table_header_row() 814: ); 815: my %frequency; 816: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) { 817: $frequency{join("\0",@{ $answer })}++; 818: } 819: $request->print(&Apache::loncommon::start_data_table_header_row() 820: .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>' 821: .'<th>'.&mt('Frequency').'<br />' 822: .'('.&mt('click for example').')</th>' 823: .&Apache::loncommon::end_data_table_header_row() 824: ); 825: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) { 826: $request->print(&Apache::loncommon::start_data_table_row() 827: .'<td>' 828: .join('</td><td>',split("\0",$answer)) 829: .'</td>' 830: .'<td>' 831: .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>' 832: .'</td>' 833: .&Apache::loncommon::end_data_table_row() 834: ); 835: } 836: $request->print(&Apache::loncommon::end_data_table()); 837: } 838: } else { 839: $request->print('<p class="LC_warning">' 840: .&mt('Response [_1] is not analyzable at this time.',$part) 841: .'</p>' 842: ); 843: } 844: } 845: if (scalar(keys(%allparts)) == 0 ) { 846: $request->print('<p class="LC_warning">' 847: .&mt('Found no analyzable responses in this problem.' 848: .' Currently only Numerical, Formula and String response styles are supported.') 849: .'</p>' 850: ); 851: } 852: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state); 853: &analyze_footer($request); 854: &Apache::lonhomework::showhash(%overall); 855: return $result; 856: } 857: 858: { 859: my $show_problem_status; 860: sub reset_show_problem_status { 861: undef($show_problem_status); 862: } 863: 864: sub set_show_problem_status { 865: my ($new_status) = @_; 866: $show_problem_status = lc($new_status); 867: } 868: 869: sub hide_problem_status { 870: return ($show_problem_status eq 'no' 871: || $show_problem_status eq 'no_feedback_ever'); 872: } 873: 874: sub show_problem_status { 875: return ($show_problem_status eq 'yes' 876: || $show_problem_status eq 'answer' 877: || $show_problem_status eq ''); 878: } 879: 880: sub show_some_problem_status { 881: return ($show_problem_status eq 'no'); 882: } 883: 884: sub show_no_problem_status { 885: return ($show_problem_status eq 'no_feedback_ever'); 886: } 887: 888: sub show_answer_problem_status { 889: return ($show_problem_status eq 'answer'); 890: } 891: } 892: 893: sub editxmlmode { 894: my ($request,$file) = @_; 895: my $result; 896: my $problem=&Apache::lonnet::getfile($file); 897: if ($problem eq -1) { 898: &Apache::lonxml::error( 899: '<b> ' 900: .&mt('Unable to find [_1]', 901: '<span class="LC_filename">'.$file.'</span>') 902: .'</b>'); 903: 904: $problem=''; 905: } 906: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) { 907: my $error=&handle_save_or_undo($request,\$problem, 908: \$env{'form.editxmltext'}); 909: if (!$error) { $problem=&Apache::lonnet::getfile($file); } 910: } 911: &Apache::lonhomework::showhashsubset(\%env,'^form'); 912: if ( $env{'form.submitbutton'} eq &mt('Save and View') ) { 913: &Apache::lonhomework::showhashsubset(\%env,'^form'); 914: $env{'form.problemmode'}='view'; 915: &renderpage($request,$file); 916: } else { 917: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem); 918: if ($cols > 80) { $cols = 80; } 919: if ($cols < 70) { $cols = 70; } 920: if ($rows < 20) { $rows = 20; } 921: my $js = 922: &Apache::edit::js_change_detection(). 923: &Apache::loncommon::resize_textarea_js(). 924: &Apache::structuretags::setmode_javascript(). 925: &Apache::lonhtmlcommon::dragmath_js("EditMathPopup"); 926: my $only_body = ($env{'environment.remote'} eq 'off')? 0 : 1; 927: my $dragmath_button = 928: &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1); 929: 930: # Breadcrumbs 931: my $brcrum = [{'href' => &Apache::loncommon::authorspace(), 932: 'text' => 'Construction Space'}, 933: {'href' => '', 934: 'text' => 'Problem Editing'}]; 935: 936: my $start_page = 937: &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js, 938: {'no_auto_mt_title' => 1, 939: 'only_body' => $only_body, 940: 'add_entries' => { 941: 'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')], 942: 'onload' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')], 943: }, 944: 'bread_crumbs' => $brcrum, 945: }); 946: 947: $result=$start_page 948: .&Apache::loncommon::head_subbox( 949: &Apache::loncommon::CSTR_pageheader()); 950: $result.=&renderpage($request,$file,['no_output_web'],1). 951: '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'. 952: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'. 953: &Apache::structuretags::remember_problem_state().' 954: <div class="LC_edit_problem_editxml_header"> 955: <table class="LC_edit_problem_header_title"><tr><td> 956: '.&mt('Problem Editing').&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').' 957: </td><td align="right"> 958: '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').' 959: </td></tr> 960: </table> 961: <div class="LC_edit_problem_discards"> 962: <input type="hidden" name="problemmode" value="editxml" /> 963: 964: <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '. 965: 'onclick="javascript:setmode(this.form,'."'discard'".')" /> 966: <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" /> 967: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> 968: '.$dragmath_button.' 969: </div> 970: <div class="LC_edit_problem_saves"> 971: <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'" /> 972: <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" /> 973: </div> 974: <hr /> 975: '.&Apache::lonxml::message_location().' 976: </div> 977: ' . ' 978: <textarea '.&Apache::edit::element_change_detection(). 979: ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '. 980: ' name="editxmltext" id="LC_editxmltext">'. 981: &HTML::Entities::encode($problem,'<>&"').'</textarea> 982: <div id="LC_aftertextarea"> 983: </div> 984: </form>'.&Apache::loncommon::end_page(); 985: &Apache::lonxml::add_messages(\$result); 986: $request->print($result); 987: } 988: return ''; 989: } 990: 991: # 992: # Render the page in whatever target desired. 993: # 994: sub renderpage { 995: my ($request,$file,$targets,$return_string) = @_; 996: 997: my @targets = @{$targets || [&get_target()]}; 998: &Apache::lonhomework::showhashsubset(\%env,'form.'); 999: &Apache::lonxml::debug("Running targets ".join(':',@targets)); 1000: 1001: my $overall_result; 1002: foreach my $target (@targets) { 1003: # FIXME need to do something intelligent when a problem goes 1004: # from viewable to not viewable due to map conditions 1005: #&setuppermissions(); 1006: #if ( $Apache::lonhomework::browse ne '2' 1007: # && $Apache::lonhomework::browse ne 'F' ) { 1008: # $request->print(" You most likely shouldn't see me."); 1009: #} 1010: #my $t0 = [&gettimeofday()]; 1011: my $output=1; 1012: if ($target eq 'no_output_web') { 1013: $target = 'web'; $output=0; 1014: } 1015: my $problem=&Apache::lonnet::getfile($file); 1016: my $result; 1017: if ($problem eq -1) { 1018: $problem=''; 1019: my $filename=(split('/',$file))[-1]; 1020: my $error = 1021: "<b> ".&mt('Unable to find [_1]', 1022: '<span class="LC_filename">'.$filename.'</span>') 1023: ."</b>"; 1024: $result.= 1025: &Apache::loncommon::simple_error_page($request,'Not available', 1026: $error); 1027: return; 1028: } 1029: 1030: my %mystyle; 1031: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); } 1032: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); } 1033: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');} 1034: 1035: &Apache::lonxml::debug("Should be parsing now"); 1036: $result .= &Apache::lonxml::xmlparse($request, $target, $problem, 1037: &setup_vars($target),%mystyle); 1038: &finished_parsing(); 1039: if (!$output) { $result = ''; } 1040: #$request->print("Result follows:"); 1041: if ($target eq 'modified') { 1042: &handle_save_or_undo($request,\$problem,\$result); 1043: } else { 1044: if ($target eq 'analyze') { 1045: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze); 1046: undef(%Apache::lonhomework::analyze); 1047: } 1048: #my $td=&tv_interval($t0); 1049: #if ( $Apache::lonxml::debug) { 1050: #$result =~ s:</body>::; 1051: #$result.="<br />Spent $td seconds processing target $target\n</body>"; 1052: #} 1053: # $request->print($result); 1054: $overall_result.=$result; 1055: # $request->rflush(); 1056: } 1057: #$request->print(":Result ends"); 1058: #my $td=&tv_interval($t0); 1059: } 1060: if (!$return_string) { 1061: &Apache::lonxml::add_messages(\$overall_result); 1062: $request->print($overall_result); 1063: $request->rflush(); 1064: } else { 1065: return $overall_result; 1066: } 1067: } 1068: 1069: sub finished_parsing { 1070: undef($Apache::lonhomework::parsing_a_problem); 1071: undef($Apache::lonhomework::parsing_a_task); 1072: } 1073: 1074: sub get_template_list { 1075: my ($extension) = @_; 1076: my $result; 1077: my @allnames; 1078: &Apache::lonxml::debug("Looking for :$extension:"); 1079: my $glob_extension = $extension; 1080: if ($extension eq 'survey' || $extension eq 'exam') { 1081: $glob_extension = 'problem'; 1082: } 1083: my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}. 1084: '/templates/*.'.$glob_extension); 1085: @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')), 1086: (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')), 1087: &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files); 1088: @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files); 1089: my ($midpoint,$seconddiv,$numfiles); 1090: $numfiles = 0; 1091: foreach my $file (@files) { 1092: next if ($file->[1] !~ /\S/); 1093: $numfiles ++; 1094: } 1095: if ($numfiles > 0) { 1096: $result = '<div class="LC_left_float">'; 1097: $midpoint = int($numfiles/2); 1098: if ($numfiles%2) { 1099: $midpoint ++; 1100: } 1101: } 1102: my $count = 0; 1103: my $currentcategory=''; 1104: my $first = 1; 1105: foreach my $file (@files) { 1106: next if ($file->[1] !~ /\S/); 1107: if ($file->[2] ne $currentcategory) { 1108: $currentcategory=$file->[2]; 1109: if ((!$seconddiv) && ($count >= $midpoint)) { 1110: $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n"; 1111: $seconddiv = 1; 1112: } elsif (!$first) { 1113: $result.='</div>'."\n"; 1114: } else { 1115: $first = 0; 1116: } 1117: $result.= '<div class="LC_Box">'."\n" 1118: .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n"; 1119: $count++; 1120: } 1121: $result .= 1122: '<label><input type="radio" name="template" value="'.$file->[0].'" />'. 1123: $file->[1].'</label>'; 1124: if ($file->[3]) { 1125: $result.=&Apache::loncommon::help_open_topic($file->[3]); 1126: } 1127: my $filename=$file->[0]; 1128: $filename=~s/^\/home\/httpd\/html//; 1129: $result.=' <span class="LC_fontsize_small">' 1130: .'<a href="'.$filename.'" target="sample">'.&mt('Example').'</a>' 1131: .'</span><br />'."\n"; 1132: $count ++; 1133: } 1134: if ($numfiles > 0) { 1135: $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n"; 1136: } 1137: return $result; 1138: } 1139: 1140: sub newproblem { 1141: my ($request) = @_; 1142: 1143: if ($env{'form.template'}) { 1144: my $file = $env{'form.template'}; 1145: my $dest = &Apache::lonnet::filelocation("",$request->uri); 1146: &File::Copy::copy($file,$dest); 1147: &renderpage($request,$dest); 1148: return; 1149: } 1150: 1151: my ($extension) = ($request->uri =~ m/\.(\w+)$/); 1152: &Apache::lonxml::debug("Looking for :$extension:"); 1153: my $templatelist=&get_template_list($extension); 1154: if ($env{'form.newfile'} && !$templatelist) { 1155: # no templates found 1156: my $templatefilename = 1157: $request->dir_config('lonIncludes').'/templates/blank.'.$extension; 1158: &Apache::lonxml::debug("$templatefilename"); 1159: my $dest = &Apache::lonnet::filelocation("",$request->uri); 1160: &File::Copy::copy($templatefilename,$dest); 1161: &renderpage($request,$dest); 1162: } else { 1163: my $url=&HTML::Entities::encode($request->uri,'<>&"'); 1164: my $shownurl=$url; 1165: $shownurl=~s-^/~-/priv/-; 1166: my $dest = &Apache::lonnet::filelocation("",$request->uri); 1167: my $errormsg; 1168: my $instructions; 1169: my $brcrum = [{'href' => &Apache::loncommon::authorspace(), 1170: 'text' => 'Construction Space'}, 1171: {'href' => '', 1172: 'text' => "Create New $extension"}]; 1173: my $start_page = 1174: &Apache::loncommon::start_page("Create New $extension", 1175: undef, 1176: {'bread_crumbs' => $brcrum,}); 1177: $request->print( 1178: $start_page 1179: .&Apache::loncommon::head_subbox( 1180: &Apache::loncommon::CSTR_pageheader()) 1181: .'<h1>'.&mt("Creating a new $extension resource.")."</h1> 1182: $errormsg 1183: ".&mt("The requested file [_1] currently does not exist.", 1184: '<span class="LC_filename">'.$shownurl.'</span>').' 1185: <p class="LC_info"> 1186: '.&mt("To create a new $extension, select a template from the". 1187: " list below. Then click on the \"Create $extension\" button.").' 1188: </p><div><form action="'.$url.'" method="post">'); 1189: 1190: if (defined($templatelist)) { 1191: $request->print($templatelist); 1192: } 1193: $request->print('<br /><input type="submit" name="newfile" value="'. 1194: &mt("Create $extension").'" />'); 1195: $request->print('</form></div>'.&Apache::loncommon::end_page()); 1196: } 1197: return; 1198: } 1199: 1200: sub update_construct_style { 1201: if ($env{'request.state'} eq "construct" 1202: && $env{'form.problemmode'} eq 'view' 1203: && defined($env{'form.submitted'}) 1204: && !defined($env{'form.resetdata'}) 1205: && !defined($env{'form.newrandomization'})) { 1206: if ((!$env{'form.style_file'} && $env{'construct.style'}) 1207: ||$env{'form.clear_style_file'}) { 1208: &Apache::lonnet::delenv('construct.style'); 1209: } elsif ($env{'form.style_file'} 1210: && $env{'construct.style'} ne $env{'form.style_file'}) { 1211: &Apache::lonnet::appenv({'construct.style' => 1212: $env{'form.style_file'}}); 1213: } 1214: } 1215: } 1216: 1217: 1218: sub handler { 1219: #my $t0 = [&gettimeofday()]; 1220: my $request=$_[0]; 1221: $Apache::lonxml::request=$request; 1222: $Apache::lonxml::debug=$env{'user.debug'}; 1223: $env{'request.uri'}=$request->uri; 1224: &setuppermissions(); 1225: 1226: my $file=&Apache::lonnet::filelocation("",$request->uri); 1227: 1228: #check if we know where we are 1229: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 1230: # if we are browsing we might not be able to know where we are 1231: if ($Apache::lonhomework::browse ne 'F' && 1232: $env{'request.state'} ne "construct") { 1233: #should know where we are, so ask 1234: &unset_permissions(); 1235: $request->internal_redirect('/adm/ambiguous'); 1236: return OK; 1237: } 1238: } 1239: if (&setupheader($request)) { 1240: &unset_permissions(); 1241: return OK; 1242: } 1243: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade"); 1244: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'}); 1245: my ($symb) = &Apache::lonnet::whichuser(); 1246: &Apache::lonxml::debug('symb is '.$symb); 1247: if ($env{'request.state'} eq "construct") { 1248: if ( -e $file ) { 1249: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, 1250: ['problemmode']); 1251: if (!(defined $env{'form.problemmode'})) { 1252: #first visit to problem in construction space 1253: $env{'form.problemmode'}= 'view'; 1254: &renderpage($request,$file); 1255: } elsif ($env{'form.problemmode'} eq 'editxml') { 1256: &editxmlmode($request,$file); 1257: } elsif ($env{'form.problemmode'} eq 'calcanswers') { 1258: &analyze($request,$file); 1259: } else { 1260: &update_construct_style(); 1261: &renderpage($request,$file); 1262: } 1263: } else { 1264: # requested file doesn't exist in contruction space 1265: &newproblem($request); 1266: } 1267: } else { 1268: # just render the page normally outside of construction space 1269: &Apache::lonxml::debug("not construct"); 1270: &renderpage($request,$file); 1271: } 1272: #my $td=&tv_interval($t0); 1273: #&Apache::lonxml::debug("Spent $td seconds processing"); 1274: # always turn off debug messages 1275: $Apache::lonxml::debug=0; 1276: &unset_permissions(); 1277: return OK; 1278: 1279: } 1280: 1281: 1; 1282: __END__