Annotation of loncom/homework/lonhomework.pm, revision 1.317.4.3

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.317.4.3! raeburn     4: # $Id: lonhomework.pm,v 1.317.4.2 2010/11/09 17:45:09 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();
1.317.4.3! raeburn    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 ($env{'form.grade_target'});
1.317.4.1  raeburn   115:         } elsif ($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") {
                    132: 	if ( defined($env{'form.grade_target'}) ) {
                    133: 	    return ($env{'form.grade_target'});
1.145     albertel  134: 	}
1.204     albertel  135: 	if ( defined($env{'form.preview'})) {
                    136: 	    if ( defined($env{'form.submitted'})) {
1.145     albertel  137: 		return ('grade', 'web');
                    138: 	    } else {
                    139: 		return ('web');
                    140: 	    }
                    141: 	} else {
1.267     albertel  142: 	    if ($env{'form.problemstate'} eq 'WEB_GRADE') {
                    143: 		#$env{'form.webgrade'} = 'yes';
                    144: 		return ('grade','webgrade','answer');
1.289     raeburn   145: 	    } elsif (($env{'form.problemmode'} eq 'view') ||
                    146: 		     ($env{'form.problemmode'} eq 'discard')) {
1.204     albertel  147: 		if ( defined($env{'form.submitted'}) &&
                    148: 		     (!defined($env{'form.resetdata'})) &&
                    149: 		     (!defined($env{'form.newrandomization'}))) {
1.145     albertel  150: 		    return ('grade', 'web','answer');
                    151: 		} else {
                    152: 		    return ('web','answer');
                    153: 		}
1.289     raeburn   154: 	    } elsif ($env{'form.problemmode'} eq 'edit') {
1.204     albertel  155: 		if ( $env{'form.submitted'} eq 'edit' ) {
1.289     raeburn   156: 		    if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
1.145     albertel  157: 			return ('modified','web','answer');
                    158: 		    } else {
1.211     albertel  159: 			return ('modified','no_output_web','edit');
1.145     albertel  160: 		    }
                    161: 		} else {
1.211     albertel  162: 		    return ('no_output_web','edit');
1.145     albertel  163: 		}
                    164: 	    } else {
                    165: 		return ('web');
                    166: 	    }
                    167: 	}
1.15      albertel  168:     }
1.145     albertel  169:     return ();
1.5       albertel  170: }
                    171: 
1.3       albertel  172: sub setup_vars {
1.145     albertel  173:     my ($target) = @_;
                    174:     return ';'
1.11      albertel  175: #  return ';$external::target='.$target.';';
1.2       albertel  176: }
                    177: 
1.36      albertel  178: sub createmenu {
1.145     albertel  179:     my ($which,$request)=@_;
                    180:     if ($which eq 'grade') {
1.306     bisitz    181: 	$request->print('<script type="text/javascript" language="JavaScript"> 
1.91      albertel  182:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  183:                  "height=350,width=150,menubar=no");
                    184:           </script>');
1.145     albertel  185:     }
1.36      albertel  186: }
                    187: 
1.200     albertel  188: sub proctor_checked_in {
1.226     albertel  189:     my ($slot_name,$slot,$type)=@_;
                    190:     my @possible_proctors=split(",",$slot->{'proctor'});
                    191:     
1.248     albertel  192:     return 1 if (!@possible_proctors);
                    193: 
1.226     albertel  194:     my $key;
                    195:     if ($type eq 'Task') {
1.230     albertel  196: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
                    197: 	$key ="resource.$version.0.checkedin";
1.226     albertel  198:     } elsif ($type eq 'problem') {
                    199: 	$key ='resource.0.checkedin';
                    200:     }
1.249     albertel  201:     # backward compatability, used to be username@domain, 
                    202:     # now is username:domain
                    203:     my $who = $Apache::lonhomework::history{$key};
                    204:     if ($who !~ /:/) {
                    205: 	$who =~ tr/@/:/;
                    206:     }     
1.226     albertel  207:     foreach my $possible (@possible_proctors) { 
1.249     albertel  208: 	if ($who eq $possible
1.226     albertel  209: 	    && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
1.202     albertel  210: 	    return 1;
                    211: 	}
                    212:     }
1.226     albertel  213:     
1.200     albertel  214:     return 0;
                    215: }
                    216: 
1.226     albertel  217: sub check_slot_access {
                    218:     my ($id,$type)=@_;
                    219: 
1.207     albertel  220:     # does it pass normal muster
1.226     albertel  221:     my ($status,$datemsg)=&check_access($id);
                    222:     
1.252     albertel  223:     my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
1.251     albertel  224:     if ($useslots ne 'resource' && $useslots ne 'map' 
                    225: 	&& $useslots ne 'map_map') {
1.226     albertel  226: 	return ($status,$datemsg);
                    227:     }
                    228: 
1.200     albertel  229:     if ($status eq 'SHOW_ANSWER' ||
                    230: 	$status eq 'CLOSED' ||
                    231: 	$status eq 'INVALID_ACCESS' ||
                    232: 	$status eq 'UNAVAILABLE') {
                    233: 	return ($status,$datemsg);
                    234:     }
1.204     albertel  235:     if ($env{'request.state'} eq "construct") {
1.203     albertel  236: 	return ($status,$datemsg);
                    237:     }
1.226     albertel  238:     
                    239:     if ($type eq 'Task') {
                    240: 	my $version=$Apache::lonhomework::history{'resource.version'};
1.230     albertel  241: 	if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
                    242: 	    $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
1.226     albertel  243: 	    return ('SHOW_ANSWER');
                    244: 	}
1.207     albertel  245:     }
1.226     albertel  246: 
1.288     raeburn   247:     my $availablestudent = &Apache::lonnet::EXT("resource.0.availablestudent");
                    248:     my $available = &Apache::lonnet::EXT("resource.0.available");
                    249:     my @slots= (split(':',$availablestudent),split(':',$available));
1.210     albertel  250: 
1.200     albertel  251: #    if (!@slots) {
                    252: #	return ($status,$datemsg);
                    253: #    }
                    254:     my $slotstatus='NOT_IN_A_SLOT';
1.206     albertel  255:     my ($returned_slot,$slot_name);
1.210     albertel  256:     foreach my $slot (@slots) {
1.241     albertel  257: 	$slot =~ s/(^\s*|\s*$)//g;
1.201     albertel  258: 	&Apache::lonxml::debug("getting $slot");
1.200     albertel  259: 	my %slot=&Apache::lonnet::get_slot($slot);
1.201     albertel  260: 	&Apache::lonhomework::showhash(%slot);
1.200     albertel  261: 	if ($slot{'starttime'} < time &&
                    262: 	    $slot{'endtime'} > time &&
1.297     raeburn   263: 	    &Apache::loncommon::check_ip_acc($slot{'ip'})) {
1.202     albertel  264: 	    &Apache::lonxml::debug("$slot is good");
                    265: 	    $slotstatus='NEEDS_CHECKIN';
                    266: 	    $returned_slot=\%slot;
1.206     albertel  267: 	    $slot_name=$slot;
1.200     albertel  268: 	    last;
                    269: 	}
                    270:     }
1.202     albertel  271:     if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.226     albertel  272: 	&proctor_checked_in($slot_name,$returned_slot,$type)) {
1.317.4.2  raeburn   273: 	&Apache::lonxml::debug("proctor checked in");
                    274: 	$slotstatus=$status;
1.200     albertel  275:     }
1.226     albertel  276: 
1.235     albertel  277:     my ($is_correct,$got_grade,$checkedin);
1.226     albertel  278:     if ($type eq 'Task') {
1.230     albertel  279: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
1.231     albertel  280: 	$got_grade = 
                    281: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} 
                    282: 	     =~ /^(?:pass|fail)$/);
1.235     albertel  283: 	$is_correct =  
                    284: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
                    285: 	     || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
1.226     albertel  286: 	$checkedin =
1.230     albertel  287: 	    $Apache::lonhomework::history{"resource.$version.0.checkedin"};
1.226     albertel  288:     } elsif ($type eq 'problem') {
1.252     albertel  289: 	$got_grade  = 1;
                    290: 	$checkedin  = $Apache::lonhomework::history{"resource.0.checkedin"};
                    291: 	$is_correct =
                    292: 	    ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
1.226     albertel  293:     }
                    294:     
1.235     albertel  295:     &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
                    296:     
1.243     albertel  297:     # no slot is currently open, and has been checked in for this version
                    298:     # but hasn't got a grade, therefore must be awaiting a grade
                    299:     if (!defined($slot_name)
                    300: 	&& $checkedin 
1.236     albertel  301: 	&& !$got_grade) {
                    302: 	return ('WAITING_FOR_GRADE');
                    303:     }
                    304: 
1.309     raeburn   305:     # Previously used slot is no longer open, and has been checked in for this version.
                    306:     # However, the problem is not closed, and potentially, another slot might be
                    307:     # used to gain access to it to work on it, until the due date is reached, and the
                    308:     # problem then becomes CLOSED.  Therefore return the slotstatus - 
                    309:     # (which will be NOT_IN_SLOT).
1.252     albertel  310:     if (!defined($slot_name)
                    311: 	&& $checkedin 
                    312: 	&& $type eq 'problem') {
1.309     raeburn   313:         return ($slotstatus);
1.252     albertel  314:     }
                    315: 
1.226     albertel  316:     if ($slotstatus eq 'NOT_IN_A_SLOT' 
                    317: 	&& $checkedin ) {
                    318: 
1.231     albertel  319: 	if ($got_grade) {
1.209     albertel  320: 	    return ('SHOW_ANSWER');
                    321: 	} else {
                    322: 	    return ('WAITING_FOR_GRADE');
                    323: 	}
1.226     albertel  324: 
1.207     albertel  325:     }
1.255     albertel  326: 
1.235     albertel  327:     if ( $is_correct) {
1.255     albertel  328: 	if ($type eq 'problem') {
                    329: 	    return ($status);
                    330: 	}
1.235     albertel  331: 	return ('SHOW_ANSWER');
                    332:     }
1.255     albertel  333: 
1.225     albertel  334:     if ( $status eq 'CANNOT_ANSWER' && 
                    335: 	 ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
                    336: 	return ($status,$datemsg);
                    337:     }
                    338: 
1.206     albertel  339:     return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198     albertel  340: }
1.200     albertel  341: 
1.301     jms       342: # JB, 9/24/2002: Any changes in this function may require a change
                    343: # in lonnavmaps::resource::getDateStatus.
1.53      www       344: sub check_access {
1.145     albertel  345:     my ($id) = @_;
                    346:     my $date ='';
                    347:     my $status;
                    348:     my $datemsg = '';
                    349:     my $lastdate = '';
                    350:     my $type;
                    351:     my $passed;
                    352: 
1.204     albertel  353:     if ($env{'request.state'} eq "construct") {
                    354: 	if ($env{'form.problemstate'}) {
                    355: 	    if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.277     albertel  356: 		if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' 
                    357: 			&& &hide_problem_status())) {
1.168     albertel  358: 		    return ('CANNOT_ANSWER',
1.174     www       359: 			    &mt('is in this state due to author settings.'));
1.167     albertel  360: 		}
1.165     albertel  361: 	    } else {
1.204     albertel  362: 		return ($env{'form.problemstate'},
1.174     www       363: 			&mt('is in this state due to author settings.'));
1.165     albertel  364: 	    }
                    365: 	}
1.145     albertel  366: 	&Apache::lonxml::debug("in construction ignoring dates");
                    367: 	$status='CAN_ANSWER';
1.146     albertel  368: 	$datemsg=&mt('is in under construction');
1.163     albertel  369: #	return ($status,$datemsg);
1.145     albertel  370:     }
                    371: 
                    372:     &Apache::lonxml::debug("checking for part :$id:");
                    373:     &Apache::lonxml::debug("time:".time);
1.152     albertel  374: 
1.261     albertel  375:     my ($symb)=&Apache::lonnet::whichuser();
1.212     albertel  376:     &Apache::lonxml::debug("symb:".$symb);
                    377:     #if ($env{'request.state'} ne "construct" && $symb ne '') {
1.204     albertel  378:     if ($env{'request.state'} ne "construct") {
1.288     raeburn   379:         my $idacc = &Apache::lonnet::EXT("resource.$id.acc");
1.297     raeburn   380: 	my $allowed=&Apache::loncommon::check_ip_acc($idacc);
1.163     albertel  381: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    382: 	    $status='INVALID_ACCESS';
                    383: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  384: 	    return($status,$date);
                    385: 	}
1.163     albertel  386: 	
1.226     albertel  387: 	foreach my $temp ("opendate","duedate","answerdate") {
1.163     albertel  388: 	    $lastdate = $date;
1.247     albertel  389: 	    if ($temp eq 'duedate') {
                    390: 		$date = &due_date($id);
                    391: 	    } else {
                    392: 		$date = &Apache::lonnet::EXT("resource.$id.$temp");
                    393: 	    }
                    394: 	    
1.163     albertel  395: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    396: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    397: 		$date     =~ /^(con_lost|no_such_host)/) {
                    398: 		$status='UNAVAILABLE';
                    399: 		$date=&mt("may open later.");
                    400: 		return($status,$date);
                    401: 	    }
                    402: 	    if ($thistype eq 'date_interval') {
                    403: 		if ($temp eq 'opendate') {
                    404: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    405: 		}
                    406: 		if ($temp eq 'answerdate') {
                    407: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    408: 		}
1.145     albertel  409: 	    }
1.163     albertel  410: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    411: 	    if ($date eq '') {
                    412: 		$date = &mt("an unknown date"); $passed = 0;
                    413: 	    } elsif ($date eq 'con_lost') {
                    414: 		$date = &mt("an indeterminate date"); $passed = 0;
                    415: 	    } else {
                    416: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
1.274     www       417: 		$date = &Apache::lonlocal::locallocaltime($date);
1.145     albertel  418: 	    }
1.163     albertel  419: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  420: 	}
1.163     albertel  421: 	&Apache::lonxml::debug("have :$type:$passed:");
                    422: 	if ($passed) {
                    423: 	    $status='SHOW_ANSWER';
                    424: 	    $datemsg=$date;
                    425: 	} elsif ($type eq 'opendate') {
                    426: 	    $status='CLOSED';
                    427: 	    $datemsg = &mt("will open on")." $date";
                    428: 	} elsif ($type eq 'duedate') {
                    429: 	    $status='CAN_ANSWER';
                    430: 	    $datemsg = &mt("is due at")." $date";
                    431: 	} elsif ($type eq 'answerdate') {
                    432: 	    $status='CLOSED';
                    433: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  434: 	}
                    435:     }
1.212     albertel  436:     if ($status eq 'CAN_ANSWER' ||
                    437: 	(($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
1.145     albertel  438: 	#check #tries, and if correct.
                    439: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    440: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    441: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  442: 	if ( $maxtries eq '' && 
1.204     albertel  443: 	     $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
1.164     albertel  444: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  445: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    446: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    447: 	    &&
1.277     albertel  448: 	    &show_problem_status())
1.145     albertel  449: 	   ||
                    450: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    451: 	    $status = 'CANNOT_ANSWER';
                    452: 	}
1.285     albertel  453: 	if ($status eq 'CANNOT_ANSWER'
                    454: 	    && &show_answer_problem_status()) {
                    455: 	    $status = 'SHOW_ANSWER';
                    456: 	}
1.121     albertel  457:     }
1.181     albertel  458:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.286     albertel  459: 	my @interval=&Apache::lonnet::EXT("resource.$id.interval");
                    460: 	&Apache::lonxml::debug("looking for interval @interval");
                    461: 	if ($interval[0]) {
                    462: 	    my $first_access=&Apache::lonnet::get_first_access($interval[1]);
1.177     albertel  463: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    464: 	    if (!$first_access) {
                    465: 		$status='NOT_YET_VIEWED';
1.247     albertel  466: 		my $due_date = &due_date($id);
1.256     albertel  467: 		my $seconds_left = $due_date - time;
1.286     albertel  468: 		if ($seconds_left > $interval[0] || $due_date eq '') {
                    469: 		    $seconds_left = $interval[0];
1.256     albertel  470: 		}
                    471: 		$datemsg=&seconds_to_human_length($seconds_left);
1.177     albertel  472: 	    }
                    473: 	}
                    474:     }
1.247     albertel  475: 
1.133     albertel  476:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    477:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    478:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    479:   #}
1.54      www       480: 
                    481: 
1.145     albertel  482:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    483:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    484: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    485: 	$status='CAN_ANSWER';
1.146     albertel  486: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  487:     }
1.106     albertel  488: 
1.145     albertel  489:     return ($status,$datemsg);
1.20      albertel  490: }
1.301     jms       491: # this should work exactly like the copy in lonnavmaps.pm
1.246     albertel  492: sub due_date {
1.250     albertel  493:     my ($part_id,$symb,$udom,$uname)=@_;
1.246     albertel  494:     my $date;
1.286     albertel  495:     my @interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
1.250     albertel  496: 				       $udom,$uname);
1.286     albertel  497:     &Apache::lonxml::debug("looking for interval $part_id $symb @interval");
1.250     albertel  498:     my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
                    499: 				       $udom,$uname);
1.247     albertel  500:     &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
1.286     albertel  501:     if ($interval[0] =~ /\d+/) {
                    502: 	my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
                    503: 	&Apache::lonxml::debug("looking for first_access $first_access ($interval[1])");
1.247     albertel  504: 	if (defined($first_access)) {
1.286     albertel  505: 	    my $interval = $first_access+$interval[0];
1.283     albertel  506: 	    $date = (!$due_date || $interval < $due_date) ? $interval
                    507:                                                           : $due_date;
1.247     albertel  508: 	} else {
                    509: 	    $date = $due_date;
                    510: 	}
                    511:     } else {
                    512: 	$date = $due_date;
1.246     albertel  513:     }
                    514:     return $date
                    515: }
                    516: 
1.192     albertel  517: sub seconds_to_human_length {
                    518:     my ($length)=@_;
                    519: 
                    520:     my $seconds=$length%60; $length=int($length/60);
                    521:     my $minutes=$length%60; $length=int($length/60);
                    522:     my $hours=$length%24;   $length=int($length/24);
                    523:     my $days=$length;
                    524: 
                    525:     my $timestr;
                    526:     if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
                    527:     if ($hours > 0) { $timestr.=($timestr?", ":"").
                    528: 			  &mt('[quant,_1,hour]',$hours); }
                    529:     if ($minutes > 0) { $timestr.=($timestr?", ":"").
                    530: 			    &mt('[quant,_1,minute]',$minutes); }
                    531:     if ($seconds > 0) { $timestr.=($timestr?", ":"").
                    532: 			    &mt('[quant,_1,second]',$seconds); }
                    533:     return $timestr;
                    534: }
                    535: 
1.41      albertel  536: sub showhash {
1.145     albertel  537:     my (%hash) = @_;
                    538:     &showhashsubset(\%hash,'.');
                    539:     return '';
1.79      albertel  540: }
                    541: 
1.106     albertel  542: sub showarray {
                    543:     my ($array)=@_;
                    544:     my $string="(";
                    545:     foreach my $elm (@{ $array }) {
1.193     albertel  546: 	if (ref($elm) eq 'ARRAY') {
                    547: 	    $string.=&showarray($elm);
                    548: 	} elsif (ref($elm) eq 'HASH') {
                    549: 	    $string.= "HASH --- \n<br />";
                    550: 	    $string.= &showhashsubset($elm,'.');
1.106     albertel  551: 	} else {
                    552: 	    $string.="$elm,"
                    553: 	}
                    554:     }
                    555:     chop($string);
                    556:     $string.=")";
                    557:     return $string;
                    558: }
                    559: 
1.79      albertel  560: sub showhashsubset {
1.145     albertel  561:     my ($hash,$keyre) = @_;
                    562:     my $resultkey;
                    563:     foreach $resultkey (sort keys %$hash) {
1.193     albertel  564: 	if ($resultkey !~ /$keyre/) { next; }
                    565: 	if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
                    566: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    567: 				   &showarray($$hash{$resultkey}));
                    568: 	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
                    569: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    570: 	    &showhashsubset($$hash{$resultkey},'.');
                    571: 	} else {
                    572: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145     albertel  573: 	}
                    574:     }
                    575:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    576:     return '';
1.41      albertel  577: }
                    578: 
                    579: sub setuppermissions {
1.204     albertel  580:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
                    581:     my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145     albertel  582:     if (! $viewgrades && 
1.204     albertel  583: 	exists($env{'request.course.sec'}) && 
                    584: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    585: 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                    586:                                                '/'.$env{'request.course.sec'});
1.145     albertel  587:     }
1.244     albertel  588:     $Apache::lonhomework::viewgrades = $viewgrades;
                    589: 
1.185     albertel  590:     if ($Apache::lonhomework::browse eq 'F' && 
1.204     albertel  591: 	$env{'form.devalidatecourseresdata'} eq 'on') {
1.261     albertel  592: 	my (undef,$courseid) = &Apache::lonnet::whichuser();
1.204     albertel  593: 	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
                    594: 					      $env{"course.$courseid.domain"});
1.185     albertel  595:     }
1.244     albertel  596: 
1.205     albertel  597:     my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
                    598:     if (! $modifygrades && 
                    599: 	exists($env{'request.course.sec'}) && 
                    600: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    601: 	$modifygrades = 
                    602: 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
                    603: 				     '/'.$env{'request.course.sec'});
                    604:     }
                    605:     $Apache::lonhomework::modifygrades = $modifygrades;
1.244     albertel  606: 
                    607:     my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
                    608:     if (! $queuegrade && 
                    609: 	exists($env{'request.course.sec'}) && 
                    610: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    611: 	$queuegrade = 
                    612: 	    &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
                    613: 				     '/'.$env{'request.course.sec'});
                    614:     }
                    615:     $Apache::lonhomework::queuegrade = $queuegrade;
1.205     albertel  616:     return '';
1.41      albertel  617: }
                    618: 
1.253     albertel  619: sub unset_permissions {
                    620:     undef($Apache::lonhomework::queuegrade);
                    621:     undef($Apache::lonhomework::modifygrades);
                    622:     undef($Apache::lonhomework::viewgrades);
                    623:     undef($Apache::lonhomework::browse);
                    624: }
                    625: 
1.41      albertel  626: sub setupheader {
1.120     albertel  627:     my $request=$_[0];
1.197     albertel  628:     &Apache::loncommon::content_type($request,'text/html');
1.120     albertel  629:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    630: 	&Apache::loncommon::no_cache($request);
                    631:     }
1.196     albertel  632: #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                    633: #							  'lastrevisiondate'));
1.120     albertel  634:     $request->send_http_header;
                    635:     return OK if $request->header_only;
                    636:     return ''
1.41      albertel  637: }
1.35      albertel  638: 
1.47      albertel  639: sub handle_save_or_undo {
1.145     albertel  640:     my ($request,$problem,$result) = @_;
                    641:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    642:     my $filebak =$file.".bak";
                    643:     my $filetmp =$file.".tmp";
                    644:     my $error=0;
1.204     albertel  645:     if ($env{'form.Undo'} eq &mt('undo')) {
1.145     albertel  646: 	my $error=0;
1.284     albertel  647: 	if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
                    648: 	if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
                    649: 	if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
1.145     albertel  650: 	if (!$error) {
1.266     albertel  651: 	    &Apache::lonxml::info("<p><b>".
                    652: 				  &mt("Undid changes, Switched [_1] and [_2]",
                    653: 				      '<span class="LC_filename">'.$filebak.
                    654: 				      '</span>',
                    655: 				      '<span class="LC_filename">'.$file.
                    656: 				      '</span>')."</b></p>");
1.145     albertel  657: 	} else {
1.266     albertel  658: 	    &Apache::lonxml::info("<p><span class=\"LC_error\">".
                    659: 				  &mt("Unable to undo, unable to switch [_1] and [_2]",
                    660: 				      '<span class="LC_filename">'.
                    661: 				      $filebak.'</span>',
                    662: 				      '<span class="LC_filename">'.
                    663: 				      $file.'</span>')."</span></p>");
1.145     albertel  664: 	    $error=1;
                    665: 	}
1.52      albertel  666:     } else {
1.262     banghart  667:         &Apache::lonnet::correct_line_ends($result);
1.145     albertel  668: 	my $fs=Apache::File->new(">$filebak");
                    669: 	if (defined($fs)) {
                    670: 	    print $fs $$problem;
                    671: 	} else {
1.266     albertel  672: 	    &Apache::lonxml::info("<span class=\"LC_error\">".
                    673: 				  &mt("Unable to make backup [_1]",
                    674: 				      '<span class="LC_filename">'.
                    675: 				      $filebak.'</span>')."</span>");
1.145     albertel  676: 	    $error=2;
                    677: 	}
                    678: 	my $fh=Apache::File->new(">$file");
                    679: 	if (defined($fh)) {
                    680: 	    print $fh $$result;
                    681: 	} else {
1.266     albertel  682: 	    &Apache::lonxml::info('<span class="LC_error">'.
                    683: 				  &mt("Unable to write to [_1]",
                    684: 				      '<span class="LC_filename">'.
                    685: 				      $file.'</span>').
                    686: 				  '</span>');
1.145     albertel  687: 	    $error|=4;
                    688: 	}
1.52      albertel  689:     }
1.145     albertel  690:     return $error;
1.64      albertel  691: }
                    692: 
1.101     albertel  693: sub analyze_header {
                    694:     my ($request) = @_;
1.289     raeburn   695:     my $js = &Apache::structuretags::setmode_javascript();
1.312     bisitz    696: 
                    697:     # Breadcrumbs
                    698:     my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
                    699:                    'text' => 'Construction Space'},
                    700:                   {'href' => '',
                    701:                    'text' => 'Problem Testing'},
                    702:                   {'href' => '',
                    703:                    'text' => 'Analyzing a problem'}];
                    704: 
1.238     albertel  705:     my $result =
1.312     bisitz    706:         &Apache::loncommon::start_page('Analyzing a problem',
                    707:                                        $js,
                    708:                                        {'bread_crumbs' => $brcrum,})
1.311     bisitz    709:        .&Apache::loncommon::head_subbox(
                    710:                 &Apache::loncommon::CSTR_pageheader());
1.238     albertel  711:     $result .= 
                    712: 	&Apache::lonxml::message_location().'
1.310     bisitz    713:             <form name="lonhomework" method="post" action="'.
1.204     albertel  714: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.289     raeburn   715:             '<input type="hidden" name="problemmode" value="'.
                    716:             $env{'form.problemmode'}.'" />'.
1.179     albertel  717: 	    &Apache::structuretags::remember_problem_state().'
1.278     albertel  718:             <div class="LC_edit_problem_analyze_header">
1.289     raeburn   719:             <input type="button" name="submitmode" value="'.&mt("EditXML").'" '.
                    720:             'onclick="javascript:setmode(this.form,'."'editxml'".')" />
                    721:             <input type="button" name="submitmode" value="'.&mt('Edit').'" '.
                    722:             'onclick="javascript:setmode(this.form,'."'edit'".')" />
1.313     bisitz    723:             <hr />
1.289     raeburn   724:             <input type="button" name="submitmode" value="'.&mt("View").'" '.
                    725:             'onclick="javascript:setmode(this.form,'."'view'".')" />
1.313     bisitz    726:             <hr />
1.278     albertel  727:             </div>
1.101     albertel  728:             </form>';
1.171     albertel  729:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  730:     $request->print($result);
                    731:     $request->rflush();
                    732: }
                    733: 
1.109     albertel  734: sub analyze_footer {
                    735:     my ($request) = @_;
1.237     albertel  736:     $request->print(&Apache::loncommon::end_page());
1.109     albertel  737:     $request->rflush();
                    738: }
                    739: 
1.74      albertel  740: sub analyze {
1.101     albertel  741:     my ($request,$file) = @_;
                    742:     &Apache::lonxml::debug("Analyze");
                    743:     my $result;
                    744:     my %overall;
1.219     www       745:     my %seedexample;
1.101     albertel  746:     my %allparts;
1.204     albertel  747:     my $rndseed=$env{'form.rndseed'};
1.101     albertel  748:     &analyze_header($request);
1.114     albertel  749:     my %prog_state=
1.146     albertel  750: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    751: 					      &mt('Getting Problem Variants'),
1.204     albertel  752: 					      $env{'form.numtoanalyze'},
1.175     albertel  753: 					      'inline',undef);
1.204     albertel  754:     for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  755: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  756: 						 &mt('last problem'));
1.182     albertel  757: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.219     www       758:         my $thisseed=$i+$rndseed;
1.101     albertel  759: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    760: 					   ('grade_target' => 'analyze'),
1.219     www       761: 					   ('rndseed' => $thisseed));
1.101     albertel  762: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    763: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  764: 	my @parts;
                    765: 	if (defined(@{ $analyze{'parts'} })) {
                    766: 	    @parts=@{ $analyze{'parts'} };
                    767: 	}
1.101     albertel  768: 	foreach my $part (@parts) {
                    769: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  770: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    771: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    772: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.263     albertel  773: 		foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
                    774: 		    my $i=0;
                    775: 		    foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
                    776: 			push( @{ $overall{$part.'.answer'}[$i] },
                    777: 			      $answer_part);
                    778: 			my $concatanswer= join("\0",@{ $answer_part });
                    779: 			if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
1.266     albertel  780: 			    $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
1.263     albertel  781: 			}
                    782: 			$seedexample{join("\0",$part,$i,@{$answer_part})}=
                    783: 			    $thisseed;
                    784: 			$i++;
                    785: 		    }
1.219     www       786: 		}
1.275     albertel  787: 		if (!keys(%{ $analyze{$part.'.answer'} })) {
                    788: 		    my $answer_part = 
                    789: 			['<span class="LC_error">'.&mt('Error').'</span>'];
                    790: 		    $seedexample{join("\0",$part,0,@{$answer_part})}=
                    791: 			$thisseed;
                    792: 		    push( @{ $overall{$part.'.answer'}[0] },
                    793: 			  $answer_part);
                    794: 		}
1.101     albertel  795: 	    }
                    796: 	}
                    797:     }
1.114     albertel  798:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  799: 					  &mt('Analyzing Results'));
1.313     bisitz    800:     $request->print('<hr />'
1.308     bisitz    801:                    .'<h3>'
                    802:                    .&mt('List of possible answers')
                    803:                    .'</h3>'
                    804:     );
1.134     albertel  805:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  806: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.263     albertel  807: 	    for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
                    808: 		my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
1.308     bisitz    809:                 $request->print(&Apache::loncommon::start_data_table()
                    810:                                .&Apache::loncommon::start_data_table_header_row()
                    811:                                .'<th colspan="'.($num_cols+1).'">'
                    812:                                .&mt('Part').' '.$part
                    813:                 );
1.263     albertel  814: 		if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
1.308     bisitz    815: 		    $request->print(' '.&mt('Answer [_1]',$i+1));
1.263     albertel  816: 		}
1.308     bisitz    817: 		$request->print('</th>'
                    818:                                .&Apache::loncommon::end_data_table_header_row()
                    819:                 );
1.263     albertel  820: 		my %frequency;
                    821: 		foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
                    822: 		    $frequency{join("\0",@{ $answer })}++;
                    823: 		}
1.308     bisitz    824:                 $request->print(&Apache::loncommon::start_data_table_header_row()
                    825:                                .'<th colspan="'.($num_cols).'">'.&mt('Answer').'</th>'
                    826:                                .'<th>'.&mt('Frequency').'<br />'
                    827:                                .'('.&mt('click for example').')</th>'
                    828:                                .&Apache::loncommon::end_data_table_header_row()
                    829:                 );
1.263     albertel  830: 		foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
1.308     bisitz    831:                     $request->print(&Apache::loncommon::start_data_table_row()
                    832:                                    .'<td>'
                    833:                                    .join('</td><td>',split("\0",$answer))
                    834: 				   .'</td>'
                    835:                                    .'<td>'
                    836:                                    .'<a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.'</a>'
                    837: 				   .'</td>'
                    838:                                    .&Apache::loncommon::end_data_table_row()
                    839:                     );
1.263     albertel  840: 		}
1.308     bisitz    841:                 $request->print(&Apache::loncommon::end_data_table());
1.109     albertel  842: 	    }
                    843: 	} else {
1.307     bisitz    844:             $request->print('<p class="LC_warning">'
                    845:                            .&mt('Response [_1] is not analyzable at this time.',$part)
                    846: 			   .'</p>'
                    847:             );
1.101     albertel  848: 	}
                    849:     }
1.130     albertel  850:     if (scalar(keys(%allparts)) == 0 ) {
1.307     bisitz    851:         $request->print('<p class="LC_warning">'
                    852:                        .&mt('Found no analyzable responses in this problem.'
                    853:                            .' Currently only Numerical, Formula and String response styles are supported.')
                    854:                        .'</p>'
                    855:         );
1.130     albertel  856:     }
1.114     albertel  857:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  858:     &analyze_footer($request);
1.101     albertel  859:     &Apache::lonhomework::showhash(%overall);
                    860:     return $result;
1.74      albertel  861: }
                    862: 
1.277     albertel  863: {
                    864:     my $show_problem_status;
                    865:     sub reset_show_problem_status {
                    866: 	undef($show_problem_status);
                    867:     }
                    868: 
                    869:     sub set_show_problem_status {
                    870: 	my ($new_status) = @_;
                    871: 	$show_problem_status = lc($new_status);
                    872:     }
                    873: 
                    874:     sub hide_problem_status {
                    875: 	return ($show_problem_status eq 'no'
                    876: 		|| $show_problem_status eq 'no_feedback_ever');
                    877:     }
                    878: 
                    879:     sub show_problem_status {
                    880: 	return ($show_problem_status eq 'yes'
1.285     albertel  881: 		|| $show_problem_status eq 'answer'
1.277     albertel  882: 		|| $show_problem_status eq '');
                    883:     }
                    884:     
                    885:     sub show_some_problem_status {
                    886: 	return ($show_problem_status eq 'no');
                    887:     }
                    888: 
                    889:     sub show_no_problem_status {
                    890: 	return ($show_problem_status eq 'no_feedback_ever');
                    891:     }
1.285     albertel  892:   
                    893:     sub show_answer_problem_status {
                    894: 	return ($show_problem_status eq 'answer');
                    895:     }
1.277     albertel  896: }
                    897: 
1.64      albertel  898: sub editxmlmode {
1.145     albertel  899:     my ($request,$file) = @_;
                    900:     my $result;
                    901:     my $problem=&Apache::lonnet::getfile($file);
                    902:     if ($problem eq -1) {
1.305     bisitz    903: 	&Apache::lonxml::error(
                    904:             '<b> '
                    905:            .&mt('Unable to find [_1]',
                    906:                 '<span class="LC_filename">'.$file.'</span>')
                    907:            .'</b>');
                    908: 
1.145     albertel  909: 	$problem='';
                    910:     }
1.204     albertel  911:     if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
1.145     albertel  912: 	my $error=&handle_save_or_undo($request,\$problem,
1.204     albertel  913: 				       \$env{'form.editxmltext'});
1.145     albertel  914: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    915:     }
1.204     albertel  916:     &Apache::lonhomework::showhashsubset(\%env,'^form');
1.289     raeburn   917:     if ( $env{'form.submitbutton'} eq &mt('Save and View') ) {
1.204     albertel  918: 	&Apache::lonhomework::showhashsubset(\%env,'^form');
1.289     raeburn   919: 	$env{'form.problemmode'}='view';
1.145     albertel  920: 	&renderpage($request,$file);
                    921:     } else {
                    922: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
                    923: 	if ($cols > 80) { $cols = 80; }
                    924: 	if ($cols < 70) { $cols = 70; }
                    925: 	if ($rows < 20) { $rows = 20; }
1.269     albertel  926: 	my $js =
                    927: 	    &Apache::edit::js_change_detection(). 
1.289     raeburn   928: 	    &Apache::loncommon::resize_textarea_js().
1.296     raeburn   929:             &Apache::structuretags::setmode_javascript().
1.298     foxr      930:             &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.270     albertel  931: 	my $only_body =  ($env{'environment.remote'} eq 'off')? 0 : 1;
1.296     raeburn   932: 	my $dragmath_button = 
                    933:             &Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
1.312     bisitz    934: 
                    935:     # Breadcrumbs
                    936:     my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
                    937:                    'text' => 'Construction Space'},
                    938:                   {'href' => '',
                    939:                    'text' => 'Problem Editing'}];
                    940: 
1.238     albertel  941: 	my $start_page = 
1.269     albertel  942: 	    &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
                    943: 					   {'no_auto_mt_title' => 1,
1.270     albertel  944: 					    'only_body'        => $only_body,
1.269     albertel  945: 					    'add_entries'      => {
                    946: 						'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
                    947: 						'onload'   => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
1.312     bisitz    948:                                     },
                    949:                                                 'bread_crumbs' => $brcrum,
                    950: });
1.311     bisitz    951: 
                    952:     $result=$start_page
                    953:            .&Apache::loncommon::head_subbox(
                    954:                 &Apache::loncommon::CSTR_pageheader());
                    955: 	$result.=&renderpage($request,$file,['no_output_web'],1).
1.310     bisitz    956:             '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="post" action="'.
1.204     albertel  957: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  958: 	    &Apache::structuretags::remember_problem_state().'
1.278     albertel  959:             <div class="LC_edit_problem_editxml_header">
1.280     albertel  960:               <table class="LC_edit_problem_header_title"><tr><td>
1.317     bisitz    961:                <h2>'.&mt('Problem Editing').' '.&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'</h2>
1.280     albertel  962:                 </td><td align="right">
1.301     jms       963:                   '.&Apache::loncommon::helpLatexCheatsheet('Problem_LON-CAPA_Functions','Script Functions').'
1.280     albertel  964:                 </td></tr>
                    965:               </table>
                    966:               <div class="LC_edit_problem_discards">
1.289     raeburn   967:                 <input type="hidden" name="problemmode" value="editxml" />
1.294     foxr      968: 
1.289     raeburn   969:                 <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
                    970:                 'onclick="javascript:setmode(this.form,'."'discard'".')" />
                    971:                 <input type="button" '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'edit'".')').'name="submitmode" accesskey="e" value="'.&mt('Edit').'" />
1.280     albertel  972:                 <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.296     raeburn   973:                 '.$dragmath_button.'
1.280     albertel  974:               </div>
                    975:               <div class="LC_edit_problem_saves">
1.289     raeburn   976:                 <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save').'"  />
1.296     raeburn   977:                 <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.280     albertel  978:               </div>
1.316     bisitz    979:               <hr style="clear:both;" />
1.281     albertel  980: 	      '.&Apache::lonxml::message_location().'
1.278     albertel  981:             </div>
1.280     albertel  982:             '  . '
1.269     albertel  983:             <textarea '.&Apache::edit::element_change_detection().
                    984: 	              ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
                    985: 		      ' name="editxmltext" id="LC_editxmltext">'.
                    986: 		      &HTML::Entities::encode($problem,'<>&"').'</textarea>
                    987:             <div id="LC_aftertextarea">
                    988:             </div>
1.238     albertel  989:             </form>'.&Apache::loncommon::end_page();
1.171     albertel  990: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  991: 	$request->print($result);
                    992:     }
                    993:     return '';
1.47      albertel  994: }
1.189     albertel  995: 
1.301     jms       996: #
                    997: #    Render the page in whatever target desired.
                    998: #
1.41      albertel  999: sub renderpage {
1.213     albertel 1000:     my ($request,$file,$targets,$return_string) = @_;
1.52      albertel 1001: 
1.211     albertel 1002:     my @targets = @{$targets || [&get_target()]};
1.204     albertel 1003:     &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145     albertel 1004:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.268     albertel 1005: 
1.171     albertel 1006:     my $overall_result;
1.145     albertel 1007:     foreach my $target (@targets) {
1.183     albertel 1008: 	# FIXME need to do something intelligent when a problem goes
                   1009:         # from viewable to not viewable due to map conditions
                   1010: 	#&setuppermissions();
                   1011: 	#if (   $Apache::lonhomework::browse ne '2'
                   1012: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                   1013: 	#    $request->print(" You most likely shouldn't see me.");
                   1014: 	#}
1.145     albertel 1015: 	#my $t0 = [&gettimeofday()];
1.211     albertel 1016: 	my $output=1;
                   1017: 	if ($target eq 'no_output_web') {
                   1018: 	    $target = 'web'; $output=0;
                   1019: 	}
1.145     albertel 1020: 	my $problem=&Apache::lonnet::getfile($file);
1.222     albertel 1021: 	my $result;
1.145     albertel 1022: 	if ($problem eq -1) {
1.260     albertel 1023: 	    $problem='';
1.222     albertel 1024: 	    my $filename=(split('/',$file))[-1];
1.260     albertel 1025: 	    my $error =
                   1026: 		"<b> ".&mt('Unable to find [_1]',
1.305     bisitz   1027: 			   '<span class="LC_filename">'.$filename.'</span>')
1.260     albertel 1028: 		."</b>";
                   1029: 	    $result.=
                   1030: 		&Apache::loncommon::simple_error_page($request,'Not available',
                   1031: 						      $error);
                   1032: 	    return;
1.145     albertel 1033: 	}
1.52      albertel 1034: 
1.145     albertel 1035: 	my %mystyle;
                   1036: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                   1037: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204     albertel 1038: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145     albertel 1039: 
                   1040: 	&Apache::lonxml::debug("Should be parsing now");
1.222     albertel 1041: 	$result .= &Apache::lonxml::xmlparse($request, $target, $problem,
                   1042: 					     &setup_vars($target),%mystyle);
1.273     albertel 1043: 	&finished_parsing();
1.214     albertel 1044: 	if (!$output) { $result = ''; }
1.145     albertel 1045: 	#$request->print("Result follows:");
                   1046: 	if ($target eq 'modified') {
                   1047: 	    &handle_save_or_undo($request,\$problem,\$result);
                   1048: 	} else {
                   1049: 	    if ($target eq 'analyze') {
                   1050: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                   1051: 		undef(%Apache::lonhomework::analyze);
                   1052: 	    }
                   1053: 	    #my $td=&tv_interval($t0);
                   1054: 	    #if ( $Apache::lonxml::debug) {
                   1055: 	    #$result =~ s:</body>::;
                   1056: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                   1057: 	    #}
1.171     albertel 1058: #	    $request->print($result);
                   1059: 	    $overall_result.=$result;
                   1060: #	    $request->rflush();
1.145     albertel 1061: 	}
                   1062: 	#$request->print(":Result ends");
                   1063: 	#my $td=&tv_interval($t0);
1.52      albertel 1064:     }
1.213     albertel 1065:     if (!$return_string) {
                   1066: 	&Apache::lonxml::add_messages(\$overall_result);
                   1067: 	$request->print($overall_result);   
                   1068: 	$request->rflush();   
                   1069:     } else {
                   1070: 	return $overall_result;
                   1071:     }
1.41      albertel 1072: }
                   1073: 
1.273     albertel 1074: sub finished_parsing {
                   1075:     undef($Apache::lonhomework::parsing_a_problem);
                   1076:     undef($Apache::lonhomework::parsing_a_task);
                   1077: }
                   1078: 
1.42      albertel 1079: sub get_template_list {
1.282     albertel 1080:     my ($extension) = @_;
1.145     albertel 1081:     my $result;
                   1082:     my @allnames;
                   1083:     &Apache::lonxml::debug("Looking for :$extension:");
1.282     albertel 1084:     my $glob_extension  = $extension;
                   1085:     if ($extension eq 'survey' || $extension eq 'exam') {
                   1086: 	$glob_extension = 'problem';
                   1087:     }
                   1088:     my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
                   1089: 		     '/templates/*.'.$glob_extension);
1.292     www      1090:     @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title')),
                   1091:                       (&Apache::lonnet::metadata($_, 'category')?&mt(&Apache::lonnet::metadata($_, 'category')):&mt('Miscellaneous')),
                   1092:                       &mt(&Apache::lonnet::metadata($_, 'help'))]} (@files);
                   1093:     @files = sort {$a->[2].$a->[1] cmp $b->[2].$b->[1]} (@files);
1.287     raeburn  1094:     my ($midpoint,$seconddiv,$numfiles);
                   1095:     $numfiles = 0;
                   1096:     foreach my $file (@files) {
                   1097:         next if ($file->[1] !~ /\S/);
                   1098:         $numfiles ++;
                   1099:     }
                   1100:     if ($numfiles > 0) {
                   1101:         $result = '<div class="LC_left_float">';
                   1102:         $midpoint = int($numfiles/2);
                   1103:         if ($numfiles%2) {
                   1104:             $midpoint ++;
                   1105:         }
                   1106:     }
                   1107:     my $count = 0;
1.292     www      1108:     my $currentcategory='';
1.314     bisitz   1109:     my $first = 1;
1.282     albertel 1110:     foreach my $file (@files) {
                   1111: 	next if ($file->[1] !~ /\S/);
1.292     www      1112:         if ($file->[2] ne $currentcategory) {
                   1113:            $currentcategory=$file->[2];
                   1114:            if ((!$seconddiv) && ($count >= $midpoint)) {
1.314     bisitz   1115:                $result .= '</div></div>'."\n".'<div class="LC_left_float">'."\n";
1.292     www      1116:                $seconddiv = 1;
1.314     bisitz   1117:            } elsif (!$first) {
                   1118:                $result.='</div>'."\n";
                   1119:            } else {
                   1120:                $first = 0;
1.292     www      1121:            }
1.314     bisitz   1122:            $result.= '<div class="LC_Box">'."\n"
                   1123:                     .'<h3 class="LC_hcell">'.$currentcategory.'</h3>'."\n";
1.293     www      1124:            $count++;
1.292     www      1125:         }
1.282     albertel 1126: 	$result .=
                   1127: 	    '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
1.292     www      1128: 	    $file->[1].'</label>';
                   1129:         if ($file->[3]) {
                   1130:            $result.=&Apache::loncommon::help_open_topic($file->[3]);
                   1131:         }
                   1132:         my $filename=$file->[0];
                   1133:         $filename=~s/^\/home\/httpd\/html//;
1.314     bisitz   1134:         $result.=' <span class="LC_fontsize_small">'
1.315     droeschl 1135:                 .'<a href="'.$filename.'?inhibitmenu=yes" target="sample">'.&mt('Example').'</a>'
1.314     bisitz   1136:                 .'</span><br />'."\n";
1.287     raeburn  1137:         $count ++;
                   1138:     }
                   1139:     if ($numfiles > 0) {
1.314     bisitz   1140:         $result .= '</div></div>'."\n".'<div class="LC_clear_float_footer"></div>'."\n";
1.42      albertel 1141:     }
1.145     albertel 1142:     return $result;
1.42      albertel 1143: }
                   1144: 
                   1145: sub newproblem {
1.65      matthew  1146:     my ($request) = @_;
1.282     albertel 1147: 
                   1148:     if ($env{'form.template'}) {
                   1149: 	my $file = $env{'form.template'};
1.65      matthew  1150: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1151: 	&File::Copy::copy($file,$dest);
1.65      matthew  1152: 	&renderpage($request,$dest);
1.282     albertel 1153: 	return;
                   1154:     }
                   1155: 
                   1156:     my ($extension) = ($request->uri =~ m/\.(\w+)$/);
                   1157:     &Apache::lonxml::debug("Looking for :$extension:");
                   1158:     my $templatelist=&get_template_list($extension);
                   1159:     if ($env{'form.newfile'} && !$templatelist) {
                   1160: 	# no templates found
1.131     albertel 1161: 	my $templatefilename =
1.258     albertel 1162: 	    $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1.131     albertel 1163: 	&Apache::lonxml::debug("$templatefilename");
                   1164: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1165: 	&File::Copy::copy($templatefilename,$dest);
1.131     albertel 1166: 	&renderpage($request,$dest);
1.85      albertel 1167:     } else {
1.176     albertel 1168: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                   1169: 	my $shownurl=$url;	
1.157     albertel 1170: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew  1171: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel 1172: 	my $errormsg;
1.85      albertel 1173: 	my $instructions;
1.312     bisitz   1174:         my $brcrum = [{'href' => &Apache::loncommon::authorspace(),
                   1175:                        'text' => 'Construction Space'},
                   1176:                       {'href' => '',
                   1177:                        'text' => "Create New $extension"}];
1.240     albertel 1178: 	my $start_page = 
1.312     bisitz   1179:             &Apache::loncommon::start_page("Create New $extension",
                   1180:                                            undef,
                   1181:                                            {'bread_crumbs' => $brcrum,});
1.311     bisitz   1182: 	$request->print(
                   1183:         $start_page
                   1184:        .&Apache::loncommon::head_subbox(
                   1185:                 &Apache::loncommon::CSTR_pageheader())
                   1186:        .'<h1>'.&mt("Creating a new $extension resource.")."</h1>
1.128     albertel 1187: $errormsg
1.258     albertel 1188: ".&mt("The requested file [_1] currently does not exist.",
1.314     bisitz   1189:       '<span class="LC_filename">'.$shownurl.'</span>').'
                   1190: <p class="LC_info">
                   1191: '.&mt("To create a new $extension, select a template from the".
                   1192:       " list below. Then click on the \"Create $extension\" button.").'
                   1193: </p><div><form action="'.$url.'" method="post">');
1.258     albertel 1194: 
1.85      albertel 1195: 	if (defined($templatelist)) {
1.282     albertel 1196: 	    $request->print($templatelist);
1.85      albertel 1197: 	}
1.282     albertel 1198: 	$request->print('<br /><input type="submit" name="newfile" value="'.
                   1199: 			&mt("Create $extension").'" />');
1.314     bisitz   1200: 	$request->print('</form></div>'.&Apache::loncommon::end_page());
1.65      matthew  1201:     }
1.282     albertel 1202:     return;
1.42      albertel 1203: }
                   1204: 
1.268     albertel 1205: sub update_construct_style {
                   1206:     if ($env{'request.state'} eq "construct"
1.289     raeburn  1207: 	&& $env{'form.problemmode'} eq 'view' 
1.268     albertel 1208: 	&&  defined($env{'form.submitted'})
                   1209: 	&& !defined($env{'form.resetdata'})
                   1210: 	&& !defined($env{'form.newrandomization'})) {
                   1211: 	if ((!$env{'form.style_file'} && $env{'construct.style'})
                   1212: 	    ||$env{'form.clear_style_file'}) {
1.303     raeburn  1213: 	    &Apache::lonnet::delenv('construct.style');
1.268     albertel 1214: 	} elsif ($env{'form.style_file'} 
                   1215: 	    && $env{'construct.style'} ne $env{'form.style_file'}) {
1.291     raeburn  1216: 	    &Apache::lonnet::appenv({'construct.style' => 
                   1217: 				        $env{'form.style_file'}});
1.268     albertel 1218: 	}
                   1219:     }
                   1220: }
                   1221: 
                   1222: 
1.41      albertel 1223: sub handler {
1.145     albertel 1224:     #my $t0 = [&gettimeofday()];
                   1225:     my $request=$_[0];
1.223     albertel 1226:     $Apache::lonxml::request=$request;
1.204     albertel 1227:     $Apache::lonxml::debug=$env{'user.debug'};
                   1228:     $env{'request.uri'}=$request->uri;
1.180     albertel 1229:     &setuppermissions();
1.193     albertel 1230: 
1.145     albertel 1231:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                   1232: 
                   1233:     #check if we know where we are
1.204     albertel 1234:     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
1.145     albertel 1235: 	# if we are browsing we might not be able to know where we are
1.173     albertel 1236: 	if ($Apache::lonhomework::browse ne 'F' && 
1.204     albertel 1237: 	    $env{'request.state'} ne "construct") {
1.145     albertel 1238: 	    #should know where we are, so ask
1.253     albertel 1239: 	    &unset_permissions();
                   1240: 	    $request->internal_redirect('/adm/ambiguous');
                   1241: 	    return OK;
1.145     albertel 1242: 	}
                   1243:     }
1.253     albertel 1244:     if (&setupheader($request)) {
                   1245: 	&unset_permissions();
                   1246: 	return OK;
                   1247:     }
1.244     albertel 1248:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1.204     albertel 1249:     &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.261     albertel 1250:     my ($symb) = &Apache::lonnet::whichuser();
1.145     albertel 1251:     &Apache::lonxml::debug('symb is '.$symb);
1.204     albertel 1252:     if ($env{'request.state'} eq "construct") {
1.145     albertel 1253: 	if ( -e $file ) {
                   1254: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1255: 						    ['problemmode']);
1.204     albertel 1256: 	    if (!(defined $env{'form.problemmode'})) {
1.145     albertel 1257: 		#first visit to problem in construction space
1.289     raeburn  1258: 		$env{'form.problemmode'}= 'view';
1.145     albertel 1259: 		&renderpage($request,$file);
1.289     raeburn  1260: 	    } elsif ($env{'form.problemmode'} eq 'editxml') {
1.145     albertel 1261: 		&editxmlmode($request,$file);
1.289     raeburn  1262: 	    } elsif ($env{'form.problemmode'} eq 'calcanswers') {
1.145     albertel 1263: 		&analyze($request,$file);
                   1264: 	    } else {
1.268     albertel 1265: 		&update_construct_style();
1.145     albertel 1266: 		&renderpage($request,$file);
                   1267: 	    }
                   1268: 	} else {
                   1269: 	    # requested file doesn't exist in contruction space
                   1270: 	    &newproblem($request);
                   1271: 	}
                   1272:     } else {
                   1273: 	# just render the page normally outside of construction space
                   1274: 	&Apache::lonxml::debug("not construct");
1.52      albertel 1275: 	&renderpage($request,$file);
1.41      albertel 1276:     }
1.145     albertel 1277:     #my $td=&tv_interval($t0);
                   1278:     #&Apache::lonxml::debug("Spent $td seconds processing");
                   1279:     # always turn off debug messages
                   1280:     $Apache::lonxml::debug=0;
1.253     albertel 1281:     &unset_permissions();
1.145     albertel 1282:     return OK;
1.52      albertel 1283: 
1.1       albertel 1284: }
                   1285: 
                   1286: 1;
                   1287: __END__

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