Annotation of loncom/homework/lonhomework.pm, revision 1.351

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.351   ! droeschl    4: # $Id: lonhomework.pm,v 1.350 2015/04/15 04:11:20 raeburn Exp $
1.63      albertel    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/
1.159     www        27: 
1.1       albertel   28: 
                     29: package Apache::lonhomework;
                     30: use strict;
1.73      albertel   31: use Apache::style();
                     32: use Apache::lonxml();
1.204     albertel   33: use Apache::lonnet;
1.73      albertel   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();
1.83      albertel   41: use Apache::caparesponse();
                     42: use Apache::radiobuttonresponse();
                     43: use Apache::optionresponse();
                     44: use Apache::imageresponse();
                     45: use Apache::essayresponse();
                     46: use Apache::externalresponse();
1.106     albertel   47: use Apache::rankresponse();
1.107     albertel   48: use Apache::matchresponse();
1.137     albertel   49: use Apache::chemresponse();
1.321     www        50: use Apache::functionplotresponse();
1.169     albertel   51: use Apache::drawimage();
1.26      www        52: use Apache::Constants qw(:common);
1.83      albertel   53: use Apache::loncommon();
1.146     albertel   54: use Apache::lonlocal;
1.179     albertel   55: use Time::HiRes qw( gettimeofday tv_interval );
1.282     albertel   56: use HTML::Entities();
                     57: use File::Copy();
1.188     foxr       58: 
1.189     albertel   59: # FIXME - improve commenting
1.188     foxr       60: 
1.43      albertel   61: 
1.69      harris41   62: BEGIN {
1.145     albertel   63:     &Apache::lonxml::register_insert();
1.43      albertel   64: }
                     65: 
1.188     foxr       66: 
1.276     foxr       67: =pod
                     68: 
                     69: =item set_bubble_lines()
                     70: 
                     71: Called at analysis time to set the bubble lines
                     72: hash for the problem.. This should be called in the
                     73: end_problemtype tag in analysis mode.
                     74: 
                     75: We fetch the hash of part id counters from lonxml
                     76:     and push them into analyze:{part_id.bubble_lines}.
                     77: 
                     78: =cut
                     79: 
                     80: sub set_bubble_lines {
                     81:     my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
                     82: 
                     83:     foreach my $key (keys(%bubble_counters)) {
                     84: 	$Apache::lonhomework::analyze{"$key.bubble_lines"} =
                     85: 	    $bubble_counters{"$key"};
                     86:     }
                     87: }
                     88: 
1.301     jms        89: #
                     90: # Decides what targets to render for.
                     91: # Implicit inputs:
                     92: #   Various session environment variables:
                     93: #      request.state -  published  - is a /res/ resource
                     94: #                       uploaded   - is a /uploaded/ resource
                     95: #                       contruct   - is a /priv/ resource
                     96: #      form.grade_target - a form parameter requesting a specific target
1.5       albertel   97: sub get_target {
1.204     albertel   98:     &Apache::lonxml::debug("request.state = $env{'request.state'}");
                     99:     if( defined($env{'form.grade_target'})) {
                    100: 	&Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
1.188     foxr      101:     } else {
1.189     albertel  102: 	&Apache::lonxml::debug("form.grade_target <undefined>");
1.188     foxr      103:     }
1.204     albertel  104:     if (($env{'request.state'} eq "published") ||
                    105: 	($env{'request.state'} eq "uploaded")) {
                    106: 	if ( defined($env{'form.grade_target'}  ) 
                    107: 	     && ($env{'form.grade_target'} eq 'tex')) {
                    108: 	    return ($env{'form.grade_target'});
                    109: 	} elsif ( defined($env{'form.grade_target'}  ) 
1.145     albertel  110: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.207     albertel  111: 	    return ($env{'form.grade_target'});
1.244     albertel  112: 	} elsif ( $env{'form.grade_target'} eq 'webgrade'
                    113: 		  && ($Apache::lonhomework::queuegrade eq 'F' )) {
                    114: 	    return ($env{'form.grade_target'});
1.320     raeburn   115: 	} elsif ($env{'form.grade_target'} eq 'answer') {
                    116:             if ($env{'form.answer_output_mode'} eq 'tex') {
                    117:                 return ($env{'form.grade_target'});
                    118:             }
                    119:         }
1.207     albertel  120: 	if ($env{'form.webgrade'} &&
1.244     albertel  121: 	    ($Apache::lonhomework::modifygrades eq 'F'
                    122: 	     || $Apache::lonhomework::queuegrade eq 'F' )) {
1.207     albertel  123: 	    return ('grade','webgrade');
1.145     albertel  124: 	}
1.204     albertel  125: 	if ( defined($env{'form.submitted'}) &&
                    126: 	     ( !defined($env{'form.newrandomization'}))) {
1.217     albertel  127: 	    return ('grade', 'web');
1.145     albertel  128: 	} else {
1.217     albertel  129: 	    return ('web');
1.145     albertel  130: 	}
1.204     albertel  131:     } elsif ($env{'request.state'} eq "construct") {
1.323     www       132: #
                    133: # We are in construction space, editing and testing problems
                    134: #
1.204     albertel  135: 	if ( defined($env{'form.grade_target'}) ) {
                    136: 	    return ($env{'form.grade_target'});
1.145     albertel  137: 	}
1.204     albertel  138: 	if ( defined($env{'form.preview'})) {
                    139: 	    if ( defined($env{'form.submitted'})) {
1.323     www       140: #
                    141: # We are doing a problem preview
                    142: #
1.145     albertel  143: 		return ('grade', 'web');
                    144: 	    } else {
                    145: 		return ('web');
                    146: 	    }
                    147: 	} else {
1.267     albertel  148: 	    if ($env{'form.problemstate'} eq 'WEB_GRADE') {
                    149: 		return ('grade','webgrade','answer');
1.324     www       150:             } elsif ($env{'form.problemmode'} eq 'view') {
                    151:                 return ('grade','web','answer');
1.323     www       152: 	    } elsif ($env{'form.problemmode'} eq 'saveview') {
                    153:                 return ('modified','web','answer');
                    154:             } elsif ($env{'form.problemmode'} eq 'discard') {
                    155:                 return ('web','answer');
                    156:             } elsif (($env{'form.problemmode'} eq 'saveedit') ||
                    157:                      ($env{'form.problemmode'} eq 'undo')) {
                    158:                 return ('modified','no_output_web','edit');
                    159:             } elsif ($env{'form.problemmode'} eq 'edit') {
                    160: 		return ('no_output_web','edit');
1.145     albertel  161: 	    } else {
                    162: 		return ('web');
                    163: 	    }
1.323     www       164:         }
                    165: #
1.338     raeburn   166: # End of Authoring Space
1.323     www       167: #
1.15      albertel  168:     }
1.323     www       169: #
                    170: # Huh? We are nowhere, so do nothing.
                    171: #
1.145     albertel  172:     return ();
1.5       albertel  173: }
                    174: 
1.3       albertel  175: sub setup_vars {
1.145     albertel  176:     my ($target) = @_;
                    177:     return ';'
1.11      albertel  178: #  return ';$external::target='.$target.';';
1.2       albertel  179: }
                    180: 
1.200     albertel  181: sub proctor_checked_in {
1.226     albertel  182:     my ($slot_name,$slot,$type)=@_;
                    183:     my @possible_proctors=split(",",$slot->{'proctor'});
                    184:     
1.248     albertel  185:     return 1 if (!@possible_proctors);
                    186: 
1.226     albertel  187:     my $key;
                    188:     if ($type eq 'Task') {
1.230     albertel  189: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
                    190: 	$key ="resource.$version.0.checkedin";
1.226     albertel  191:     } elsif ($type eq 'problem') {
                    192: 	$key ='resource.0.checkedin';
                    193:     }
1.249     albertel  194:     # backward compatability, used to be username@domain, 
                    195:     # now is username:domain
                    196:     my $who = $Apache::lonhomework::history{$key};
                    197:     if ($who !~ /:/) {
                    198: 	$who =~ tr/@/:/;
                    199:     }     
1.226     albertel  200:     foreach my $possible (@possible_proctors) { 
1.249     albertel  201: 	if ($who eq $possible
1.226     albertel  202: 	    && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
1.202     albertel  203: 	    return 1;
                    204: 	}
                    205:     }
1.226     albertel  206:     
1.200     albertel  207:     return 0;
                    208: }
                    209: 
1.226     albertel  210: sub check_slot_access {
                    211:     my ($id,$type)=@_;
                    212: 
1.207     albertel  213:     # does it pass normal muster
1.226     albertel  214:     my ($status,$datemsg)=&check_access($id);
                    215:     
1.252     albertel  216:     my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
1.251     albertel  217:     if ($useslots ne 'resource' && $useslots ne 'map' 
                    218: 	&& $useslots ne 'map_map') {
1.226     albertel  219: 	return ($status,$datemsg);
                    220:     }
                    221: 
1.200     albertel  222:     if ($status eq 'SHOW_ANSWER' ||
                    223: 	$status eq 'CLOSED' ||
                    224: 	$status eq 'INVALID_ACCESS' ||
                    225: 	$status eq 'UNAVAILABLE') {
                    226: 	return ($status,$datemsg);
                    227:     }
1.204     albertel  228:     if ($env{'request.state'} eq "construct") {
1.203     albertel  229: 	return ($status,$datemsg);
                    230:     }
1.226     albertel  231:     
                    232:     if ($type eq 'Task') {
                    233: 	my $version=$Apache::lonhomework::history{'resource.version'};
1.230     albertel  234: 	if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
                    235: 	    $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
1.226     albertel  236: 	    return ('SHOW_ANSWER');
                    237: 	}
1.207     albertel  238:     }
1.226     albertel  239: 
1.288     raeburn   240:     my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
                    241:     my $available = &Apache::lonnet::EXT("resource.0.available");
                    242:     my @slots= (split(':',$availablestudent),split(':',$available));
1.210     albertel  243: 
1.200     albertel  244: #    if (!@slots) {
                    245: #	return ($status,$datemsg);
                    246: #    }
                    247:     my $slotstatus='NOT_IN_A_SLOT';
1.206     albertel  248:     my ($returned_slot,$slot_name);
1.334     raeburn   249:     my $now = time;
                    250:     my $num_usable_slots = 0;
1.210     albertel  251:     foreach my $slot (@slots) {
1.241     albertel  252: 	$slot =~ s/(^\s*|\s*$)//g;
1.201     albertel  253: 	&Apache::lonxml::debug("getting $slot");
1.200     albertel  254: 	my %slot=&Apache::lonnet::get_slot($slot);
1.201     albertel  255: 	&Apache::lonhomework::showhash(%slot);
1.334     raeburn   256:         next if ($slot{'endtime'} < $now);
                    257:         $num_usable_slots ++;
                    258: 	if ($slot{'starttime'} < $now &&
                    259: 	    $slot{'endtime'} > $now &&
1.297     raeburn   260: 	    &Apache::loncommon::check_ip_acc($slot{'ip'})) {
1.202     albertel  261: 	    &Apache::lonxml::debug("$slot is good");
                    262: 	    $slotstatus='NEEDS_CHECKIN';
                    263: 	    $returned_slot=\%slot;
1.206     albertel  264: 	    $slot_name=$slot;
1.200     albertel  265: 	    last;
1.334     raeburn   266:         } 
1.200     albertel  267:     }
1.202     albertel  268:     if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.226     albertel  269: 	&proctor_checked_in($slot_name,$returned_slot,$type)) {
1.322     raeburn   270: 	&Apache::lonxml::debug("proctor checked in");
                    271: 	$slotstatus=$status;
1.200     albertel  272:     }
1.226     albertel  273: 
1.235     albertel  274:     my ($is_correct,$got_grade,$checkedin);
1.226     albertel  275:     if ($type eq 'Task') {
1.230     albertel  276: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
1.231     albertel  277: 	$got_grade = 
                    278: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} 
                    279: 	     =~ /^(?:pass|fail)$/);
1.235     albertel  280: 	$is_correct =  
                    281: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
                    282: 	     || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
1.226     albertel  283: 	$checkedin =
1.230     albertel  284: 	    $Apache::lonhomework::history{"resource.$version.0.checkedin"};
1.226     albertel  285:     } elsif ($type eq 'problem') {
1.252     albertel  286: 	$got_grade  = 1;
                    287: 	$checkedin  = $Apache::lonhomework::history{"resource.0.checkedin"};
                    288: 	$is_correct =
                    289: 	    ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
1.226     albertel  290:     }
                    291:     
1.235     albertel  292:     &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
                    293:     
1.243     albertel  294:     # no slot is currently open, and has been checked in for this version
                    295:     # but hasn't got a grade, therefore must be awaiting a grade
                    296:     if (!defined($slot_name)
                    297: 	&& $checkedin 
1.236     albertel  298: 	&& !$got_grade) {
                    299: 	return ('WAITING_FOR_GRADE');
                    300:     }
                    301: 
1.309     raeburn   302:     # Previously used slot is no longer open, and has been checked in for this version.
                    303:     # However, the problem is not closed, and potentially, another slot might be
                    304:     # used to gain access to it to work on it, until the due date is reached, and the
                    305:     # problem then becomes CLOSED.  Therefore return the slotstatus - 
1.334     raeburn   306:     # (which will be one of: NOT_IN_A_SLOT, RESERVABLE, RESERVABLE_LATER, or NOTRESERVABLE.
                    307:     if (!defined($slot_name) && $type eq 'problem') {
                    308:         if ($slotstatus eq 'NOT_IN_A_SLOT') {
                    309:             if (!$num_usable_slots) {
                    310:                 if ($env{'request.course.id'}) {
                    311:                     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    312:                     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
                    313:                     my ($symb)=&Apache::lonnet::whichuser();
                    314:                     $slotstatus = 'NOTRESERVABLE';
                    315:                     my ($reservable_now_order,$reservable_now,$reservable_future_order,
                    316:                         $reservable_future) = 
                    317:                         &Apache::loncommon::get_future_slots($cnum,$cdom,$now,$symb);
                    318:                     if ((ref($reservable_now_order) eq 'ARRAY') && (ref($reservable_now) eq 'HASH')) {
                    319:                         if (@{$reservable_now_order} > 0) {
                    320:                             $slotstatus = 'RESERVABLE';
                    321:                             $datemsg = $reservable_now->{$reservable_now_order->[-1]}{'endreserve'};
                    322:                         }
                    323:                     }
                    324:                     unless ($slotstatus eq 'RESERVABLE') {
                    325:                         if ((ref($reservable_future_order) eq 'ARRAY') && (ref($reservable_future) eq 'HASH')) {
                    326:                             if (@{$reservable_future_order} > 0) {
                    327:                                 $slotstatus = 'RESERVABLE_LATER';
                    328:                                 $datemsg = $reservable_future->{$reservable_future_order->[0]}{'startreserve'};
                    329:                             }
                    330:                         }
                    331:                     }
                    332:                 }
                    333:             }
                    334:         }
                    335:         return ($slotstatus,$datemsg);
1.252     albertel  336:     }
                    337: 
1.226     albertel  338:     if ($slotstatus eq 'NOT_IN_A_SLOT' 
                    339: 	&& $checkedin ) {
                    340: 
1.231     albertel  341: 	if ($got_grade) {
1.209     albertel  342: 	    return ('SHOW_ANSWER');
                    343: 	} else {
                    344: 	    return ('WAITING_FOR_GRADE');
                    345: 	}
1.226     albertel  346: 
1.207     albertel  347:     }
1.255     albertel  348: 
1.235     albertel  349:     if ( $is_correct) {
1.255     albertel  350: 	if ($type eq 'problem') {
                    351: 	    return ($status);
                    352: 	}
1.235     albertel  353: 	return ('SHOW_ANSWER');
                    354:     }
1.255     albertel  355: 
1.225     albertel  356:     if ( $status eq 'CANNOT_ANSWER' && 
                    357: 	 ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
                    358: 	return ($status,$datemsg);
                    359:     }
                    360: 
1.206     albertel  361:     return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198     albertel  362: }
1.200     albertel  363: 
1.301     jms       364: # JB, 9/24/2002: Any changes in this function may require a change
                    365: # in lonnavmaps::resource::getDateStatus.
1.53      www       366: sub check_access {
1.145     albertel  367:     my ($id) = @_;
                    368:     my $date ='';
                    369:     my $status;
                    370:     my $datemsg = '';
                    371:     my $lastdate = '';
                    372:     my $type;
                    373:     my $passed;
                    374: 
1.204     albertel  375:     if ($env{'request.state'} eq "construct") {
                    376: 	if ($env{'form.problemstate'}) {
                    377: 	    if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.277     albertel  378: 		if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' 
                    379: 			&& &hide_problem_status())) {
1.168     albertel  380: 		    return ('CANNOT_ANSWER',
1.174     www       381: 			    &mt('is in this state due to author settings.'));
1.167     albertel  382: 		}
1.165     albertel  383: 	    } else {
1.204     albertel  384: 		return ($env{'form.problemstate'},
1.174     www       385: 			&mt('is in this state due to author settings.'));
1.165     albertel  386: 	    }
                    387: 	}
1.145     albertel  388: 	&Apache::lonxml::debug("in construction ignoring dates");
                    389: 	$status='CAN_ANSWER';
1.146     albertel  390: 	$datemsg=&mt('is in under construction');
1.163     albertel  391: #	return ($status,$datemsg);
1.145     albertel  392:     }
                    393: 
                    394:     &Apache::lonxml::debug("checking for part :$id:");
                    395:     &Apache::lonxml::debug("time:".time);
1.152     albertel  396: 
1.261     albertel  397:     my ($symb)=&Apache::lonnet::whichuser();
1.212     albertel  398:     &Apache::lonxml::debug("symb:".$symb);
                    399:     #if ($env{'request.state'} ne "construct" && $symb ne '') {
1.204     albertel  400:     if ($env{'request.state'} ne "construct") {
1.288     raeburn   401:         my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
1.297     raeburn   402: 	my $allowed=&Apache::loncommon::check_ip_acc($idacc);
1.163     albertel  403: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    404: 	    $status='INVALID_ACCESS';
                    405: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  406: 	    return($status,$date);
                    407: 	}
1.327     raeburn   408: 	if ($env{'form.grade_imsexport'}) {
                    409:             if (($env{'request.course.id'}) && 
                    410:                 (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
                    411:                 return ('SHOW_ANSWER');
                    412:             }
                    413:         }
1.226     albertel  414: 	foreach my $temp ("opendate","duedate","answerdate") {
1.163     albertel  415: 	    $lastdate = $date;
1.247     albertel  416: 	    if ($temp eq 'duedate') {
                    417: 		$date = &due_date($id);
                    418: 	    } else {
                    419: 		$date = &Apache::lonnet::EXT("resource.$id.$temp");
                    420: 	    }
                    421: 	    
1.163     albertel  422: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    423: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    424: 		$date     =~ /^(con_lost|no_such_host)/) {
                    425: 		$status='UNAVAILABLE';
                    426: 		$date=&mt("may open later.");
                    427: 		return($status,$date);
                    428: 	    }
                    429: 	    if ($thistype eq 'date_interval') {
                    430: 		if ($temp eq 'opendate') {
                    431: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    432: 		}
                    433: 		if ($temp eq 'answerdate') {
                    434: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    435: 		}
1.145     albertel  436: 	    }
1.163     albertel  437: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    438: 	    if ($date eq '') {
                    439: 		$date = &mt("an unknown date"); $passed = 0;
                    440: 	    } elsif ($date eq 'con_lost') {
                    441: 		$date = &mt("an indeterminate date"); $passed = 0;
                    442: 	    } else {
                    443: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
1.274     www       444: 		$date = &Apache::lonlocal::locallocaltime($date);
1.145     albertel  445: 	    }
1.163     albertel  446: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  447: 	}
1.163     albertel  448: 	&Apache::lonxml::debug("have :$type:$passed:");
                    449: 	if ($passed) {
                    450: 	    $status='SHOW_ANSWER';
                    451: 	    $datemsg=$date;
                    452: 	} elsif ($type eq 'opendate') {
                    453: 	    $status='CLOSED';
1.343     bisitz    454: 	    $datemsg = &mt('will open on [_1]',$date);
1.163     albertel  455: 	} elsif ($type eq 'duedate') {
                    456: 	    $status='CAN_ANSWER';
1.343     bisitz    457: 	    $datemsg = &mt('is due at [_1]',$date);
1.163     albertel  458: 	} elsif ($type eq 'answerdate') {
                    459: 	    $status='CLOSED';
1.343     bisitz    460: 	    $datemsg = &mt('was due on [_1], and answers will be available on [_2]',
                    461:                                $lastdate,$date);
1.145     albertel  462: 	}
                    463:     }
1.212     albertel  464:     if ($status eq 'CAN_ANSWER' ||
                    465: 	(($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
1.145     albertel  466: 	#check #tries, and if correct.
                    467: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    468: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    469: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  470: 	if ( $maxtries eq '' && 
1.204     albertel  471: 	     $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
1.164     albertel  472: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  473: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
1.331     raeburn   474: 	if ( ($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/)
                    475: 	      && (&show_problem_status()) ) {
1.333     raeburn   476:             if (($Apache::lonhomework::history{"resource.$id.awarded"} >= 1) ||
                    477:                 (&Apache::lonnet::EXT("resource.$id.retrypartial") !~/^1|on|yes$/i)) {
1.331     raeburn   478: 	        $status = 'CANNOT_ANSWER';
                    479:             }
                    480:         } elsif ($Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
1.145     albertel  481: 	    $status = 'CANNOT_ANSWER';
                    482: 	}
1.285     albertel  483: 	if ($status eq 'CANNOT_ANSWER'
                    484: 	    && &show_answer_problem_status()) {
                    485: 	    $status = 'SHOW_ANSWER';
                    486: 	}
1.121     albertel  487:     }
1.181     albertel  488:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.286     albertel  489: 	my @interval=&Apache::lonnet::EXT("resource.$id.interval");
                    490: 	&Apache::lonxml::debug("looking for interval @interval");
                    491: 	if ($interval[0]) {
                    492: 	    my $first_access=&Apache::lonnet::get_first_access($interval[1]);
1.177     albertel  493: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    494: 	    if (!$first_access) {
                    495: 		$status='NOT_YET_VIEWED';
1.247     albertel  496: 		my $due_date = &due_date($id);
1.256     albertel  497: 		my $seconds_left = $due_date - time;
1.286     albertel  498: 		if ($seconds_left > $interval[0] || $due_date eq '') {
                    499: 		    $seconds_left = $interval[0];
1.256     albertel  500: 		}
                    501: 		$datemsg=&seconds_to_human_length($seconds_left);
1.177     albertel  502: 	    }
                    503: 	}
                    504:     }
1.247     albertel  505: 
1.133     albertel  506:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    507:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    508:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    509:   #}
1.54      www       510: 
1.145     albertel  511:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    512:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    513: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    514: 	$status='CAN_ANSWER';
1.146     albertel  515: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  516:     }
1.106     albertel  517: 
1.145     albertel  518:     return ($status,$datemsg);
1.20      albertel  519: }
1.301     jms       520: # this should work exactly like the copy in lonnavmaps.pm
1.246     albertel  521: sub due_date {
1.250     albertel  522:     my ($part_id,$symb,$udom,$uname)=@_;
1.246     albertel  523:     my $date;
1.286     albertel  524:     my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
1.250     albertel  525: 				       $udom,$uname);
1.286     albertel  526:     &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
1.250     albertel  527:     my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
                    528: 				       $udom,$uname);
1.247     albertel  529:     &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
1.286     albertel  530:     if ($interval[0] =~ /\d+/) {
                    531: 	my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
                    532: 	&Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
1.247     albertel  533: 	if (defined($first_access)) {
1.286     albertel  534: 	    my $interval = $first_access+$interval[0];
1.283     albertel  535: 	    $date = (!$due_date || $interval < $due_date) ? $interval
                    536:                                                           : $due_date;
1.247     albertel  537: 	} else {
                    538: 	    $date = $due_date;
                    539: 	}
                    540:     } else {
                    541: 	$date = $due_date;
1.246     albertel  542:     }
1.345     musolffc  543:     return $date;
1.246     albertel  544: }
                    545: 
1.192     albertel  546: sub seconds_to_human_length {
                    547:     my ($length)=@_;
                    548: 
                    549:     my $seconds=$length%60; $length=int($length/60);
                    550:     my $minutes=$length%60; $length=int($length/60);
                    551:     my $hours=$length%24;   $length=int($length/24);
                    552:     my $days=$length;
                    553: 
                    554:     my $timestr;
                    555:     if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
                    556:     if ($hours > 0) { $timestr.=($timestr?", ":"").
                    557: 			  &mt('[quant,_1,hour]',$hours); }
                    558:     if ($minutes > 0) { $timestr.=($timestr?", ":"").
                    559: 			    &mt('[quant,_1,minute]',$minutes); }
                    560:     if ($seconds > 0) { $timestr.=($timestr?", ":"").
                    561: 			    &mt('[quant,_1,second]',$seconds); }
                    562:     return $timestr;
                    563: }
                    564: 
1.41      albertel  565: sub showhash {
1.145     albertel  566:     my (%hash) = @_;
                    567:     &showhashsubset(\%hash,'.');
                    568:     return '';
1.79      albertel  569: }
                    570: 
1.106     albertel  571: sub showarray {
                    572:     my ($array)=@_;
                    573:     my $string="(";
                    574:     foreach my $elm (@{ $array }) {
1.193     albertel  575: 	if (ref($elm) eq 'ARRAY') {
                    576: 	    $string.=&showarray($elm);
                    577: 	} elsif (ref($elm) eq 'HASH') {
                    578: 	    $string.= "HASH --- \n<br />";
                    579: 	    $string.= &showhashsubset($elm,'.');
1.106     albertel  580: 	} else {
                    581: 	    $string.="$elm,"
                    582: 	}
                    583:     }
                    584:     chop($string);
                    585:     $string.=")";
                    586:     return $string;
                    587: }
                    588: 
1.79      albertel  589: sub showhashsubset {
1.145     albertel  590:     my ($hash,$keyre) = @_;
                    591:     my $resultkey;
1.346     raeburn   592:     foreach $resultkey (sort(keys(%$hash))) {
1.193     albertel  593: 	if ($resultkey !~ /$keyre/) { next; }
                    594: 	if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
                    595: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    596: 				   &showarray($$hash{$resultkey}));
                    597: 	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
                    598: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    599: 	    &showhashsubset($$hash{$resultkey},'.');
                    600: 	} else {
                    601: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145     albertel  602: 	}
                    603:     }
                    604:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    605:     return '';
1.41      albertel  606: }
                    607: 
                    608: sub setuppermissions {
1.204     albertel  609:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
1.337     raeburn   610:     unless ($Apache::lonhomework::browse eq 'F') {
                    611:         $Apache::lonhomework::browse=&Apache::lonnet::allowed('bro',$env{'request.filename'}); 
                    612:     }
1.204     albertel  613:     my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145     albertel  614:     if (! $viewgrades && 
1.204     albertel  615: 	exists($env{'request.course.sec'}) && 
                    616: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    617: 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                    618:                                                '/'.$env{'request.course.sec'});
1.145     albertel  619:     }
1.244     albertel  620:     $Apache::lonhomework::viewgrades = $viewgrades;
                    621: 
1.185     albertel  622:     if ($Apache::lonhomework::browse eq 'F' && 
1.204     albertel  623: 	$env{'form.devalidatecourseresdata'} eq 'on') {
1.261     albertel  624: 	my (undef,$courseid) = &Apache::lonnet::whichuser();
1.204     albertel  625: 	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
                    626: 					      $env{"course.$courseid.domain"});
1.185     albertel  627:     }
1.244     albertel  628: 
1.205     albertel  629:     my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
                    630:     if (! $modifygrades && 
                    631: 	exists($env{'request.course.sec'}) && 
                    632: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    633: 	$modifygrades = 
                    634: 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
                    635: 				     '/'.$env{'request.course.sec'});
                    636:     }
                    637:     $Apache::lonhomework::modifygrades = $modifygrades;
1.244     albertel  638: 
                    639:     my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
                    640:     if (! $queuegrade && 
                    641: 	exists($env{'request.course.sec'}) && 
                    642: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    643: 	$queuegrade = 
                    644: 	    &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
                    645: 				     '/'.$env{'request.course.sec'});
                    646:     }
                    647:     $Apache::lonhomework::queuegrade = $queuegrade;
1.205     albertel  648:     return '';
1.41      albertel  649: }
                    650: 
1.253     albertel  651: sub unset_permissions {
                    652:     undef($Apache::lonhomework::queuegrade);
                    653:     undef($Apache::lonhomework::modifygrades);
                    654:     undef($Apache::lonhomework::viewgrades);
                    655:     undef($Apache::lonhomework::browse);
                    656: }
                    657: 
1.41      albertel  658: sub setupheader {
1.120     albertel  659:     my $request=$_[0];
1.197     albertel  660:     &Apache::loncommon::content_type($request,'text/html');
1.120     albertel  661:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    662: 	&Apache::loncommon::no_cache($request);
                    663:     }
1.196     albertel  664: #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                    665: #							  'lastrevisiondate'));
1.120     albertel  666:     $request->send_http_header;
                    667:     return OK if $request->header_only;
                    668:     return ''
1.41      albertel  669: }
1.35      albertel  670: 
1.47      albertel  671: sub handle_save_or_undo {
1.338     raeburn   672:     my ($request,$problem,$result,$getobjref) = @_;
1.323     www       673: 
1.145     albertel  674:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    675:     my $filebak =$file.".bak";
                    676:     my $filetmp =$file.".tmp";
                    677:     my $error=0;
1.323     www       678:     if (($env{'form.problemmode'} eq 'undo') || ($env{'form.problemmode'} eq 'undoxml')) {
1.145     albertel  679: 	my $error=0;
1.284     albertel  680: 	if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
                    681: 	if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
                    682: 	if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
1.145     albertel  683: 	if (!$error) {
1.266     albertel  684: 	    &Apache::lonxml::info("<p><b>".
                    685: 				  &mt("Undid changes, Switched [_1] and [_2]",
                    686: 				      '<span class="LC_filename">'.$filebak.
                    687: 				      '</span>',
                    688: 				      '<span class="LC_filename">'.$file.
                    689: 				      '</span>')."</b></p>");
1.145     albertel  690: 	} else {
1.266     albertel  691: 	    &Apache::lonxml::info("<p><span class=\"LC_error\">".
                    692: 				  &mt("Unable to undo, unable to switch [_1] and [_2]",
                    693: 				      '<span class="LC_filename">'.
                    694: 				      $filebak.'</span>',
                    695: 				      '<span class="LC_filename">'.
                    696: 				      $file.'</span>')."</span></p>");
1.145     albertel  697: 	    $error=1;
                    698: 	}
1.52      albertel  699:     } else {
1.262     banghart  700:         &Apache::lonnet::correct_line_ends($result);
1.323     www       701: 
1.145     albertel  702: 	my $fs=Apache::File->new(">$filebak");
                    703: 	if (defined($fs)) {
                    704: 	    print $fs $$problem;
                    705: 	} else {
1.266     albertel  706: 	    &Apache::lonxml::info("<span class=\"LC_error\">".
                    707: 				  &mt("Unable to make backup [_1]",
                    708: 				      '<span class="LC_filename">'.
                    709: 				      $filebak.'</span>')."</span>");
1.145     albertel  710: 	    $error=2;
                    711: 	}
                    712: 	my $fh=Apache::File->new(">$file");
                    713: 	if (defined($fh)) {
                    714: 	    print $fh $$result;
1.338     raeburn   715:             if (ref($getobjref) eq 'SCALAR') {
                    716:                 if ($file =~ m{([^/]+)\.(html?)$}) {
                    717:                     my $fname = $1;
                    718:                     my $ext = $2;
                    719:                     my $path = $file;
                    720:                     $path =~ s/\Q$fname\E\.\Q$ext\E$//; 
                    721:                     my (%allfiles,%codebase);
                    722:                     &Apache::lonnet::extract_embedded_items($file,\%allfiles,
                    723:                                                            \%codebase,$result);
                    724:                     if (keys(%allfiles) > 0) {
                    725:                         my $url = $request->uri;
                    726:                         my $state = <<STATE;
                    727:     <input type="hidden" name="action" value="upload_embedded" />
                    728:     <input type="hidden" name="url" value="$url" />
                    729: STATE
                    730:                         $$getobjref = "<h3>".&mt("Reference Warning")."</h3>".
                    731:                                       "<p>".&mt("Completed upload of the file. This file contained references to other files.")."</p>".
                    732:                                       "<p>".&mt("Please select the locations from which the referenced files are to be uploaded.")."</p>".
                    733:                                       &Apache::loncommon::ask_for_embedded_content($url,$state,\%allfiles,\%codebase,
                    734:                                       {'error_on_invalid_names'   => 1,
                    735:                                        'ignore_remote_references' => 1,});
                    736:                     }
                    737:                 }
                    738:             }
1.145     albertel  739: 	} else {
1.266     albertel  740: 	    &Apache::lonxml::info('<span class="LC_error">'.
                    741: 				  &mt("Unable to write to [_1]",
                    742: 				      '<span class="LC_filename">'.
                    743: 				      $file.'</span>').
                    744: 				  '</span>');
1.145     albertel  745: 	    $error|=4;
                    746: 	}
1.52      albertel  747:     }
1.145     albertel  748:     return $error;
1.64      albertel  749: }
                    750: 
1.101     albertel  751: sub analyze_header {
                    752:     my ($request) = @_;
1.289     raeburn   753:     my $js = &Apache::structuretags::setmode_javascript();
1.312     bisitz    754: 
                    755:     # Breadcrumbs
1.330     raeburn   756:     my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1.338     raeburn   757:                    'text' => 'Authoring Space'},
1.312     bisitz    758:                   {'href' => '',
                    759:                    'text' => 'Problem Testing'},
                    760:                   {'href' => '',
                    761:                    'text' => 'Analyzing a problem'}];
                    762: 
1.238     albertel  763:     my $result =
1.312     bisitz    764:         &Apache::loncommon::start_page('Analyzing a problem',
                    765:                                        $js,
                    766:                                        {'bread_crumbs' => $brcrum,})
1.311     bisitz    767:        .&Apache::loncommon::head_subbox(
                    768:                 &Apache::loncommon::CSTR_pageheader());
1.238     albertel  769:     $result .= 
1.347     golterma  770: 	    '<form name="lonhomework" method="post" action="'.
1.204     albertel  771: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.289     raeburn   772:             '<input type="hidden" name="problemmode" value="'.
                    773:             $env{'form.problemmode'}.'" />'.
1.179     albertel  774: 	    &Apache::structuretags::remember_problem_state().'
1.278     albertel  775:             <div class="LC_edit_problem_analyze_header">
1.289     raeburn   776:             <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
                    777:             'onclick="javascript:setmode(this.form,'."'editxml'".')" />
                    778:             <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
                    779:             'onclick="javascript:setmode(this.form,'."'edit'".')" />
1.313     bisitz    780:             <hr />
1.289     raeburn   781:             <input type="button" name="submitmode" value="'.&mt("View").'" '.
                    782:             'onclick="javascript:setmode(this.form,'."'view'".')" />
1.313     bisitz    783:             <hr />
1.347     golterma  784:             </div>'
                    785:             .&Apache::lonxml::message_location().
                    786:             '</form>';
1.171     albertel  787:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  788:     $request->print($result);
                    789:     $request->rflush();
                    790: }
                    791: 
1.109     albertel  792: sub analyze_footer {
                    793:     my ($request) = @_;
1.237     albertel  794:     $request->print(&Apache::loncommon::end_page());
1.109     albertel  795:     $request->rflush();
                    796: }
                    797: 
1.74      albertel  798: sub analyze {
1.101     albertel  799:     my ($request,$file) = @_;
                    800:     &Apache::lonxml::debug("Analyze");
                    801:     my $result;
                    802:     my %overall;
1.219     www       803:     my %seedexample;
1.101     albertel  804:     my %allparts;
1.204     albertel  805:     my $rndseed=$env{'form.rndseed'};
1.101     albertel  806:     &analyze_header($request);
1.114     albertel  807:     my %prog_state=
1.335     www       808: 	&Apache::lonhtmlcommon::Create_PrgWin($request,$env{'form.numtoanalyze'});
1.204     albertel  809:     for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.335     www       810: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,'last problem');
1.182     albertel  811: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.219     www       812:         my $thisseed=$i+$rndseed;
1.101     albertel  813: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    814: 					   ('grade_target' => 'analyze'),
1.219     www       815: 					   ('rndseed' => $thisseed));
1.101     albertel  816: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    817: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  818: 	my @parts;
1.336     raeburn   819:         if (ref($analyze{'parts'}) eq 'ARRAY') {
1.114     albertel  820: 	    @parts=@{ $analyze{'parts'} };
                    821: 	}
1.101     albertel  822: 	foreach my $part (@parts) {
                    823: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  824: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    825: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    826: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.263     albertel  827: 		foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
                    828: 		    my $i=0;
                    829: 		    foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
                    830: 			push( @{ $overall{$part.'.answer'}[$i] },
                    831: 			      $answer_part);
                    832: 			my $concatanswer= join("\0",@{ $answer_part });
                    833: 			if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
1.266     albertel  834: 			    $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
1.263     albertel  835: 			}
                    836: 			$seedexample{join("\0",$part,$i,@{$answer_part})}=
                    837: 			    $thisseed;
                    838: 			$i++;
                    839: 		    }
1.219     www       840: 		}
1.275     albertel  841: 		if (!keys(%{ $analyze{$part.'.answer'} })) {
                    842: 		    my $answer_part = 
                    843: 			['<span class="LC_error">'.&mt('Error').'</span>'];
                    844: 		    $seedexample{join("\0",$part,0,@{$answer_part})}=
                    845: 			$thisseed;
                    846: 		    push( @{ $overall{$part.'.answer'}[0] },
                    847: 			  $answer_part);
                    848: 		}
1.101     albertel  849: 	    }
                    850: 	}
                    851:     }
1.335     www       852:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,&mt('Analyzing Results'));
1.313     bisitz    853:     $request->print('<hr />'
1.308     bisitz    854:                    .'<h3>'
                    855:                    .&mt('List of possible answers')
                    856:                    .'</h3>'
                    857:     );
1.134     albertel  858:     foreach my $part (sort(keys(%allparts))) {
1.336     raeburn   859:         if ((ref($overall{$part.'.answer'}) eq 'ARRAY') &&
                    860:             (@{$overall{$part.'.answer'}} > 0)) {
1.263     albertel  861: 	    for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
                    862: 		my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
1.308     bisitz    863:                 $request->print(&Apache::loncommon::start_data_table()
                    864:                                .&Apache::loncommon::start_data_table_header_row()
                    865:                                .'<th colspan="'.($num_cols+1).'">'
                    866:                                .&mt('Part').' '.$part
                    867:                 );
1.263     albertel  868: 		if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
1.308     bisitz    869: 		    $request->print(' '.&mt('Answer [_1]',$i+1));
1.263     albertel  870: 		}
1.308     bisitz    871: 		$request->print('</th>'
                    872:                                .&Apache::loncommon::end_data_table_header_row()
                    873:                 );
1.263     albertel  874: 		my %frequency;
                    875: 		foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
                    876: 		    $frequency{join("\0",@{ $answer })}++;
                    877: 		}
1.308     bisitz    878:                 $request->print(&Apache::loncommon::start_data_table_header_row()
                    879:                                .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
                    880:                                .'<th>'.&mt('Frequency').'<br />'
                    881:                                .'('.&mt('click for example').')</th>'
                    882:                                .&Apache::loncommon::end_data_table_header_row()
                    883:                 );
1.263     albertel  884: 		foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
1.308     bisitz    885:                     $request->print(&Apache::loncommon::start_data_table_row()
                    886:                                    .'<td>'
                    887:                                    .join('</td><td>',split("\0",$answer))
                    888: 				   .'</td>'
                    889:                                    .'<td>'
                    890:                                    .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
                    891: 				   .'</td>'
                    892:                                    .&Apache::loncommon::end_data_table_row()
                    893:                     );
1.263     albertel  894: 		}
1.308     bisitz    895:                 $request->print(&Apache::loncommon::end_data_table());
1.109     albertel  896: 	    }
                    897: 	} else {
1.307     bisitz    898:             $request->print('<p class="LC_warning">'
                    899:                            .&mt('Response [_1] is not analyzable at this time.',$part)
                    900: 			   .'</p>'
                    901:             );
1.101     albertel  902: 	}
                    903:     }
1.130     albertel  904:     if (scalar(keys(%allparts)) == 0 ) {
1.307     bisitz    905:         $request->print('<p class="LC_warning">'
                    906:                        .&mt('Found no analyzable responses in this problem.'
                    907:                            .' Currently only Numerical, Formula and String response styles are supported.')
                    908:                        .'</p>'
                    909:         );
1.130     albertel  910:     }
1.114     albertel  911:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  912:     &analyze_footer($request);
1.101     albertel  913:     &Apache::lonhomework::showhash(%overall);
                    914:     return $result;
1.74      albertel  915: }
                    916: 
1.277     albertel  917: {
                    918:     my $show_problem_status;
                    919:     sub reset_show_problem_status {
                    920: 	undef($show_problem_status);
                    921:     }
                    922: 
                    923:     sub set_show_problem_status {
                    924: 	my ($new_status) = @_;
                    925: 	$show_problem_status = lc($new_status);
                    926:     }
                    927: 
                    928:     sub hide_problem_status {
                    929: 	return ($show_problem_status eq 'no'
                    930: 		|| $show_problem_status eq 'no_feedback_ever');
                    931:     }
                    932: 
                    933:     sub show_problem_status {
                    934: 	return ($show_problem_status eq 'yes'
1.285     albertel  935: 		|| $show_problem_status eq 'answer'
1.277     albertel  936: 		|| $show_problem_status eq '');
                    937:     }
                    938:     
                    939:     sub show_some_problem_status {
                    940: 	return ($show_problem_status eq 'no');
                    941:     }
                    942: 
                    943:     sub show_no_problem_status {
                    944: 	return ($show_problem_status eq 'no_feedback_ever');
                    945:     }
1.285     albertel  946:   
                    947:     sub show_answer_problem_status {
                    948: 	return ($show_problem_status eq 'answer');
                    949:     }
1.277     albertel  950: }
                    951: 
1.64      albertel  952: sub editxmlmode {
1.145     albertel  953:     my ($request,$file) = @_;
                    954:     my $result;
                    955:     my $problem=&Apache::lonnet::getfile($file);
                    956:     if ($problem eq -1) {
1.305     bisitz    957: 	&Apache::lonxml::error(
1.328     bisitz    958:             '<p class="LC_error">'
1.305     bisitz    959:            .&mt('Unable to find [_1]',
                    960:                 '<span class="LC_filename">'.$file.'</span>')
1.328     bisitz    961:            .'</p>');
1.305     bisitz    962: 
1.145     albertel  963: 	$problem='';
                    964:     }
1.323     www       965:     if (($env{'form.problemmode'} eq 'saveeditxml') ||
1.347     golterma  966:         ($env{'form.problemmode'} eq 'saveviewxml') ||
1.323     www       967:         ($env{'form.problemmode'} eq 'undoxml')) {
1.145     albertel  968: 	my $error=&handle_save_or_undo($request,\$problem,
1.204     albertel  969: 				       \$env{'form.editxmltext'});
1.145     albertel  970: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    971:     }
1.204     albertel  972:     &Apache::lonhomework::showhashsubset(\%env,'^form');
1.323     www       973:     if ($env{'form.problemmode'} eq 'saveviewxml') {
1.204     albertel  974: 	&Apache::lonhomework::showhashsubset(\%env,'^form');
1.289     raeburn   975: 	$env{'form.problemmode'}='view';
1.145     albertel  976: 	&renderpage($request,$file);
                    977:     } else {
                    978: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
                    979: 	if ($cols > 80) { $cols = 80; }
                    980: 	if ($cols < 70) { $cols = 70; }
                    981: 	if ($rows < 20) { $rows = 20; }
1.269     albertel  982: 	my $js =
                    983: 	    &Apache::edit::js_change_detection(). 
1.289     raeburn   984: 	    &Apache::loncommon::resize_textarea_js().
1.296     raeburn   985:             &Apache::structuretags::setmode_javascript().
1.298     foxr      986:             &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.312     bisitz    987: 
                    988:     # Breadcrumbs
1.330     raeburn   989:     my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1.338     raeburn   990:                    'text' => 'Authoring Space'},
1.312     bisitz    991:                   {'href' => '',
                    992:                    'text' => 'Problem Editing'}];
                    993: 
1.238     albertel  994: 	my $start_page = 
1.269     albertel  995: 	    &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
                    996: 					   {'no_auto_mt_title' => 1,
1.318     droeschl  997: 					    'only_body'        => 0,
1.269     albertel  998: 					    'add_entries'      => {
                    999: 						'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
                   1000: 						'onload'   => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1.323     www      1001:                                                                   },
1.312     bisitz   1002:                                                 'bread_crumbs' => $brcrum,
1.323     www      1003:                                              });
1.311     bisitz   1004: 
                   1005:     $result=$start_page
                   1006:            .&Apache::loncommon::head_subbox(
                   1007:                 &Apache::loncommon::CSTR_pageheader());
                   1008: 	$result.=&renderpage($request,$file,['no_output_web'],1).
1.310     bisitz   1009:             '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
1.204     albertel 1010: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel 1011: 	    &Apache::structuretags::remember_problem_state().'
1.347     golterma 1012:             <div class="LC_edit_problem_header">
                   1013:               <div class="LC_edit_problem_header_title">'.
                   1014:                 &mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').
                   1015:               '</div><div class="LC_edit_actionbar" id="actionbar">';
                   1016: 
                   1017:         $result.='<input type="hidden" name="problemmode" value="saveedit" />'.
1.348     droeschl 1018:                   &Apache::structuretags::problem_edit_buttons('editxml');
1.347     golterma 1019:         $result.='<div class="LC_edit_problem_discards">';
                   1020: 
                   1021: 		unless ($env{'environment.nocodemirror'}) {
                   1022: 		# dropdown menues
                   1023:     		$result .= '<ol class="LC_primary_menu LC_floatleft">'.
1.351   ! droeschl 1024:     		&Apache::lonmenu::create_submenu("#", "", &mt("Templates"), 
        !          1025:                 &Apache::structuretags::insert_menu_datastructure(),
        !          1026:                 "").'</ol>';
1.347     golterma 1027: 		}
1.351   ! droeschl 1028:     $result .= '<ol class="LC_primary_menu LC_floatleft">';
        !          1029: 
        !          1030:     $result .= Apache::lonmenu::create_submenu("#", "", 
        !          1031:         &mt("Help") . ' <img src="/adm/help/help.png" alt="' . &mt("Help") .
        !          1032:         '" style="vertical-align:text-bottom; height: auto; margin:0; "/>', 
        !          1033:         &Apache::structuretags::helpmenu_datastructure(),"");
        !          1034: 
        !          1035:     $result.="</ol></div>";
1.323     www      1036:          
1.347     golterma 1037:          $result.='<hr style="clear:both;visibility:hidden" /></div></div>'.&Apache::lonxml::message_location().
                   1038:                   &Apache::loncommon::xmleditor_js().
                   1039: 		  '<textarea '.&Apache::edit::element_change_detection().
1.269     albertel 1040: 	              ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
                   1041: 		      ' name="editxmltext" id="LC_editxmltext">'.
                   1042: 		      &HTML::Entities::encode($problem,'<>&"').'</textarea>
                   1043:             <div id="LC_aftertextarea">
                   1044:             </div>
1.347     golterma 1045: 	        </form>';
                   1046: 	    my $resource = $env{'request.ambiguous'};
                   1047: 	    unless($env{'environment.nocodemirror'}){
                   1048: 	        
                   1049: 	        $result .= '<link rel="stylesheet" href="/adm/codemirror/codemirror-combined-xml.css">
                   1050: 	        <script src="/adm/codemirror/codemirror-compressed-xml.js"></script>
                   1051: 	        <script>
                   1052: 	            CodeMirror.defineMode("mixedmode", function(config) {
                   1053: 	                return CodeMirror.multiplexingMode(
                   1054: 	                    CodeMirror.getMode(config, "xml"),
                   1055: 	                    {
                   1056: 	                        open: "\<script type=\"loncapa/perl\"\>", close: "\</script\>",
                   1057: 	                        mode: CodeMirror.getMode(config, "perl"),
                   1058: 	                        delimStyle: "tag",
                   1059: 	                    }
                   1060: 	              );
                   1061: 	            });
                   1062: 	            var cm = CodeMirror.fromTextArea(document.getElementById("LC_editxmltext"),
                   1063: 	            {
                   1064: 	                mode: "mixedmode",
                   1065: 	                lineWrapping: true,
                   1066: 	                lineNumbers: true,
                   1067: 	                tabSize: 4,
                   1068: 	                indentUnit: 4,
                   1069: 
                   1070: 	                autoCloseTags: true,
                   1071: 	                autoCloseBrackets: true,
                   1072: 	                height: "auto",
                   1073: 	                styleActiveLine: true,
                   1074: 	                
                   1075: 	                extraKeys: {
                   1076: 	                    "Tab": "indentMore",
                   1077: 	                    "Shift-Tab": "indentLess",
                   1078: 	                }
                   1079: 	            });
                   1080: 	            restoreScrollPosition("'.$resource.'");
                   1081: 	        </script>';
                   1082: 	    }
                   1083:         $result .= &Apache::loncommon::end_page();
                   1084:         &Apache::lonxml::add_messages(\$result);
                   1085:         $request->print($result);
1.145     albertel 1086:     }
                   1087:     return '';
1.47      albertel 1088: }
1.189     albertel 1089: 
1.301     jms      1090: #
                   1091: #    Render the page in whatever target desired.
                   1092: #
1.41      albertel 1093: sub renderpage {
1.213     albertel 1094:     my ($request,$file,$targets,$return_string) = @_;
1.52      albertel 1095: 
1.211     albertel 1096:     my @targets = @{$targets || [&get_target()]};
1.204     albertel 1097:     &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145     albertel 1098:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.268     albertel 1099: 
1.171     albertel 1100:     my $overall_result;
1.145     albertel 1101:     foreach my $target (@targets) {
1.183     albertel 1102: 	# FIXME need to do something intelligent when a problem goes
                   1103:         # from viewable to not viewable due to map conditions
                   1104: 	#&setuppermissions();
                   1105: 	#if (   $Apache::lonhomework::browse ne '2'
                   1106: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                   1107: 	#    $request->print(" You most likely shouldn't see me.");
                   1108: 	#}
1.145     albertel 1109: 	#my $t0 = [&gettimeofday()];
1.211     albertel 1110: 	my $output=1;
                   1111: 	if ($target eq 'no_output_web') {
                   1112: 	    $target = 'web'; $output=0;
                   1113: 	}
1.145     albertel 1114: 	my $problem=&Apache::lonnet::getfile($file);
1.222     albertel 1115: 	my $result;
1.145     albertel 1116: 	if ($problem eq -1) {
1.260     albertel 1117: 	    $problem='';
1.222     albertel 1118: 	    my $filename=(split('/',$file))[-1];
1.260     albertel 1119: 	    my $error =
1.347     golterma 1120: 		'<p class="LC_error">'
                   1121:                .&mt('Unable to find [_1]',
                   1122: 			   '<span class="LC_filename">'.$filename.'</span>')
                   1123: 		."</p>";
1.260     albertel 1124: 	    $result.=
                   1125: 		&Apache::loncommon::simple_error_page($request,'Not available',
1.340     bisitz   1126: 						      $error,{'no_auto_mt_msg' => 1});
1.260     albertel 1127: 	    return;
1.145     albertel 1128: 	}
1.52      albertel 1129: 
1.145     albertel 1130: 	my %mystyle;
                   1131: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                   1132: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204     albertel 1133: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145     albertel 1134: 
                   1135: 	&Apache::lonxml::debug("Should be parsing now");
1.222     albertel 1136: 	$result .= &Apache::lonxml::xmlparse($request, $target, $problem,
                   1137: 					     &setup_vars($target),%mystyle);
1.273     albertel 1138: 	&finished_parsing();
1.214     albertel 1139: 	if (!$output) { $result = ''; }
1.145     albertel 1140: 	#$request->print("Result follows:");
                   1141: 	if ($target eq 'modified') {
                   1142: 	    &handle_save_or_undo($request,\$problem,\$result);
                   1143: 	} else {
                   1144: 	    if ($target eq 'analyze') {
                   1145: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                   1146: 		undef(%Apache::lonhomework::analyze);
                   1147: 	    }
                   1148: 	    #my $td=&tv_interval($t0);
                   1149: 	    #if ( $Apache::lonxml::debug) {
                   1150: 	    #$result =~ s:</body>::;
                   1151: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                   1152: 	    #}
1.171     albertel 1153: #	    $request->print($result);
                   1154: 	    $overall_result.=$result;
                   1155: #	    $request->rflush();
1.145     albertel 1156: 	}
                   1157: 	#$request->print(":Result ends");
                   1158: 	#my $td=&tv_interval($t0);
1.52      albertel 1159:     }
1.213     albertel 1160:     if (!$return_string) {
                   1161: 	&Apache::lonxml::add_messages(\$overall_result);
                   1162: 	$request->print($overall_result);   
                   1163: 	$request->rflush();   
                   1164:     } else {
                   1165: 	return $overall_result;
                   1166:     }
1.41      albertel 1167: }
                   1168: 
1.273     albertel 1169: sub finished_parsing {
                   1170:     undef($Apache::lonhomework::parsing_a_problem);
                   1171:     undef($Apache::lonhomework::parsing_a_task);
                   1172: }
                   1173: 
1.347     golterma 1174: # function extracted from get_template_html
                   1175: # returns "key" -> list
                   1176: # key: path of template
                   1177: # value 1: title
                   1178: # value 2: category
                   1179: # value 3: name of help topic ???
                   1180: sub get_template_list{
                   1181:     my ($extension) = @_;
                   1182:     
                   1183:     my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
                   1184:                      '/templates/*.'.$extension);
                   1185:     @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
                   1186:                       (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
                   1187:                       &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
                   1188:     @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
                   1189:     return @files;
                   1190: }
                   1191: 
                   1192: sub get_template_html {
1.282     albertel 1193:     my ($extension) = @_;
1.145     albertel 1194:     my $result;
                   1195:     my @allnames;
                   1196:     &Apache::lonxml::debug("Looking for :$extension:");
1.282     albertel 1197:     my $glob_extension  = $extension;
                   1198:     if ($extension eq 'survey' || $extension eq 'exam') {
                   1199: 	$glob_extension = 'problem';
                   1200:     }
1.347     golterma 1201:     my @files = &get_template_list($extension);
1.287     raeburn  1202:     my ($midpoint,$seconddiv,$numfiles);
1.341     bisitz   1203:     my @noexamplelink = ('blank.problem','blank.library','script.library');
1.287     raeburn  1204:     $numfiles = 0;
                   1205:     foreach my $file (@files) {
                   1206:         next if ($file->[1] !~ /\S/);
                   1207:         $numfiles ++;
                   1208:     }
                   1209:     if ($numfiles > 0) {
                   1210:         $result = '<div class="LC_left_float">';
                   1211:         $midpoint = int($numfiles/2);
                   1212:         if ($numfiles%2) {
                   1213:             $midpoint ++;
                   1214:         }
                   1215:     }
                   1216:     my $count = 0;
1.292     www      1217:     my $currentcategory='';
1.314     bisitz   1218:     my $first = 1;
1.329     raeburn  1219:     my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
1.282     albertel 1220:     foreach my $file (@files) {
                   1221: 	next if ($file->[1] !~ /\S/);
1.292     www      1222:         if ($file->[2] ne $currentcategory) {
                   1223:            $currentcategory=$file->[2];
                   1224:            if ((!$seconddiv) && ($count >= $midpoint)) {
1.314     bisitz   1225:                $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1.292     www      1226:                $seconddiv = 1;
1.314     bisitz   1227:            } elsif (!$first) {
                   1228:                $result.='</div>'."\n";
                   1229:            } else {
                   1230:                $first = 0;
1.292     www      1231:            }
1.314     bisitz   1232:            $result.= '<div class="LC_Box">'."\n"
                   1233:                     .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1.293     www      1234:            $count++;
1.292     www      1235:         }
1.282     albertel 1236: 	$result .=
                   1237: 	    '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1.292     www      1238: 	    $file->[1].'</label>';
                   1239:         if ($file->[3]) {
                   1240:            $result.=&Apache::loncommon::help_open_topic($file->[3]);
                   1241:         }
1.341     bisitz   1242:         # Provide example link
1.292     www      1243:         my $filename=$file->[0];
1.329     raeburn  1244:         $filename=~s{^\Q$londocroot\E}{};
1.344     raeburn  1245:         if (!(grep($filename =~ /\Q$_\E$/,@noexamplelink))) {
                   1246:             $result .= ' <span class="LC_fontsize_small">'
                   1247:                       .&Apache::loncommon::modal_link(
                   1248:                            $filename.'?inhibitmenu=yes',&mt('Example'),600,420,'sample')
                   1249:                       .'</span>';
                   1250:         }
1.341     bisitz   1251:         $result .= '<br />'."\n";
1.287     raeburn  1252:         $count ++;
                   1253:     }
                   1254:     if ($numfiles > 0) {
1.314     bisitz   1255:         $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1.42      albertel 1256:     }
1.145     albertel 1257:     return $result;
1.42      albertel 1258: }
                   1259: 
                   1260: sub newproblem {
1.65      matthew  1261:     my ($request) = @_;
1.282     albertel 1262: 
1.347     golterma 1263: 	if ($env{'form.mode'} eq 'blank'){
                   1264:         my $dest = &Apache::lonnet::filelocation("",$request->uri);
                   1265:         &File::Copy::copy('/home/httpd/html/res/adm/includes/templates/blank.problem',$dest);
                   1266:         &renderpage($request,$dest);
                   1267:         return;
                   1268:     }
1.282     albertel 1269:     if ($env{'form.template'}) {
                   1270: 	my $file = $env{'form.template'};
1.65      matthew  1271: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1272: 	&File::Copy::copy($file,$dest);
1.65      matthew  1273: 	&renderpage($request,$dest);
1.282     albertel 1274: 	return;
                   1275:     }
                   1276: 
                   1277:     my ($extension) = ($request->uri =~ m/\.(\w+)$/);
                   1278:     &Apache::lonxml::debug("Looking for :$extension:");
1.347     golterma 1279:     my $templatelist=&get_template_html($extension);
1.282     albertel 1280:     if ($env{'form.newfile'} && !$templatelist) {
                   1281: 	# no templates found
1.131     albertel 1282: 	my $templatefilename =
1.258     albertel 1283: 	    $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1.131     albertel 1284: 	&Apache::lonxml::debug("$templatefilename");
                   1285: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1286: 	&File::Copy::copy($templatefilename,$dest);
1.131     albertel 1287: 	&renderpage($request,$dest);
1.85      albertel 1288:     } else {
1.176     albertel 1289: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.65      matthew  1290: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel 1291: 	my $errormsg;
1.85      albertel 1292: 	my $instructions;
1.330     raeburn  1293:         my $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1.338     raeburn  1294:                        'text' => 'Authoring Space'},
1.312     bisitz   1295:                       {'href' => '',
                   1296:                        'text' => "Create New $extension"}];
1.240     albertel 1297: 	my $start_page = 
1.312     bisitz   1298:             &Apache::loncommon::start_page("Create New $extension",
                   1299:                                            undef,
                   1300:                                            {'bread_crumbs' => $brcrum,});
1.311     bisitz   1301: 	$request->print(
                   1302:         $start_page
                   1303:        .&Apache::loncommon::head_subbox(
                   1304:                 &Apache::loncommon::CSTR_pageheader())
                   1305:        .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1.128     albertel 1306: $errormsg
1.258     albertel 1307: ".&mt("The requested file [_1] currently does not exist.",
1.329     raeburn  1308:       '<span class="LC_filename">'.$url.'</span>').'
1.314     bisitz   1309: <p class="LC_info">
                   1310: '.&mt("To create a new $extension, select a template from the".
                   1311:       " list below. Then click on the \"Create $extension\" button.").'
                   1312: </p><div><form action="'.$url.'" method="post">');
1.258     albertel 1313: 
1.85      albertel 1314: 	if (defined($templatelist)) {
1.282     albertel 1315: 	    $request->print($templatelist);
1.85      albertel 1316: 	}
1.282     albertel 1317: 	$request->print('<br /><input type="submit" name="newfile" value="'.
                   1318: 			&mt("Create $extension").'" />');
1.314     bisitz   1319: 	$request->print('</form></div>'.&Apache::loncommon::end_page());
1.65      matthew  1320:     }
1.282     albertel 1321:     return;
1.42      albertel 1322: }
                   1323: 
1.268     albertel 1324: sub update_construct_style {
                   1325:     if ($env{'request.state'} eq "construct"
1.289     raeburn  1326: 	&& $env{'form.problemmode'} eq 'view' 
1.268     albertel 1327: 	&&  defined($env{'form.submitted'})
                   1328: 	&& !defined($env{'form.resetdata'})
                   1329: 	&& !defined($env{'form.newrandomization'})) {
                   1330: 	if ((!$env{'form.style_file'} && $env{'construct.style'})
                   1331: 	    ||$env{'form.clear_style_file'}) {
1.303     raeburn  1332: 	    &Apache::lonnet::delenv('construct.style');
1.268     albertel 1333: 	} elsif ($env{'form.style_file'} 
                   1334: 	    && $env{'construct.style'} ne $env{'form.style_file'}) {
1.291     raeburn  1335: 	    &Apache::lonnet::appenv({'construct.style' => 
                   1336: 				        $env{'form.style_file'}});
1.268     albertel 1337: 	}
                   1338:     }
                   1339: }
                   1340: 
                   1341: 
1.41      albertel 1342: sub handler {
1.145     albertel 1343:     #my $t0 = [&gettimeofday()];
                   1344:     my $request=$_[0];
1.223     albertel 1345:     $Apache::lonxml::request=$request;
1.204     albertel 1346:     $Apache::lonxml::debug=$env{'user.debug'};
                   1347:     $env{'request.uri'}=$request->uri;
1.180     albertel 1348:     &setuppermissions();
1.193     albertel 1349: 
1.145     albertel 1350:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                   1351: 
                   1352:     #check if we know where we are
1.350     raeburn  1353:     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread('','',1,1)) {
1.145     albertel 1354: 	# if we are browsing we might not be able to know where we are
1.173     albertel 1355: 	if ($Apache::lonhomework::browse ne 'F' && 
1.204     albertel 1356: 	    $env{'request.state'} ne "construct") {
1.145     albertel 1357: 	    #should know where we are, so ask
1.253     albertel 1358: 	    &unset_permissions();
                   1359: 	    $request->internal_redirect('/adm/ambiguous');
                   1360: 	    return OK;
1.145     albertel 1361: 	}
                   1362:     }
1.253     albertel 1363:     if (&setupheader($request)) {
                   1364: 	&unset_permissions();
                   1365: 	return OK;
                   1366:     }
1.244     albertel 1367:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1.204     albertel 1368:     &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.261     albertel 1369:     my ($symb) = &Apache::lonnet::whichuser();
1.145     albertel 1370:     &Apache::lonxml::debug('symb is '.$symb);
1.204     albertel 1371:     if ($env{'request.state'} eq "construct") {
1.145     albertel 1372: 	if ( -e $file ) {
                   1373: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1374: 						    ['problemmode']);
1.204     albertel 1375: 	    if (!(defined $env{'form.problemmode'})) {
1.145     albertel 1376: 		#first visit to problem in construction space
1.289     raeburn  1377: 		$env{'form.problemmode'}= 'view';
1.145     albertel 1378: 		&renderpage($request,$file);
1.323     www      1379: 	    } elsif (($env{'form.problemmode'} eq 'editxml') || 
                   1380:                      ($env{'form.problemmode'} eq 'saveeditxml') ||
                   1381:                      ($env{'form.problemmode'} eq 'saveviewxml') ||
                   1382:                      ($env{'form.problemmode'} eq 'undoxml')) {
1.145     albertel 1383: 		&editxmlmode($request,$file);
1.289     raeburn  1384: 	    } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1.145     albertel 1385: 		&analyze($request,$file);
                   1386: 	    } else {
1.268     albertel 1387: 		&update_construct_style();
1.145     albertel 1388: 		&renderpage($request,$file);
                   1389: 	    }
                   1390: 	} else {
1.347     golterma 1391: 		&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1392: 						    ['mode']);
1.145     albertel 1393: 	    # requested file doesn't exist in contruction space
                   1394: 	    &newproblem($request);
                   1395: 	}
                   1396:     } else {
                   1397: 	# just render the page normally outside of construction space
                   1398: 	&Apache::lonxml::debug("not construct");
1.52      albertel 1399: 	&renderpage($request,$file);
1.41      albertel 1400:     }
1.145     albertel 1401:     #my $td=&tv_interval($t0);
                   1402:     #&Apache::lonxml::debug("Spent $td seconds processing");
                   1403:     # always turn off debug messages
                   1404:     $Apache::lonxml::debug=0;
1.253     albertel 1405:     &unset_permissions();
1.145     albertel 1406:     return OK;
1.52      albertel 1407: 
1.1       albertel 1408: }
                   1409: 
                   1410: 1;
                   1411: __END__

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