Annotation of loncom/homework/lonhomework.pm, revision 1.284

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.284   ! albertel    4: # $Id: lonhomework.pm,v 1.283 2007/11/10 01:38:21 albertel 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();
1.169     albertel   50: use Apache::drawimage();
1.26      www        51: use Apache::Constants qw(:common);
1.83      albertel   52: use Apache::loncommon();
1.146     albertel   53: use Apache::lonlocal;
1.179     albertel   54: use Time::HiRes qw( gettimeofday tv_interval );
1.282     albertel   55: use HTML::Entities();
                     56: use File::Copy();
1.188     foxr       57: 
1.189     albertel   58: # FIXME - improve commenting
1.188     foxr       59: 
1.43      albertel   60: 
1.69      harris41   61: BEGIN {
1.145     albertel   62:     &Apache::lonxml::register_insert();
1.43      albertel   63: }
                     64: 
1.188     foxr       65: 
1.276     foxr       66: =pod
                     67: 
                     68: =item set_bubble_lines()
                     69: 
                     70: Called at analysis time to set the bubble lines
                     71: hash for the problem.. This should be called in the
                     72: end_problemtype tag in analysis mode.
                     73: 
                     74: We fetch the hash of part id counters from lonxml
                     75:     and push them into analyze:{part_id.bubble_lines}.
                     76: 
                     77: =cut
                     78: 
                     79: sub set_bubble_lines {
                     80:     my %bubble_counters = &Apache::lonxml::get_bubble_line_hash();
                     81: 
                     82:     foreach my $key (keys(%bubble_counters)) {
                     83: 	$Apache::lonhomework::analyze{"$key.bubble_lines"} =
                     84: 	    $bubble_counters{"$key"};
                     85:     }
                     86: }
                     87: 
1.188     foxr       88: #
1.189     albertel   89: # Decides what targets to render for.
1.188     foxr       90: # Implicit inputs:
                     91: #   Various session environment variables:
1.189     albertel   92: #      request.state -  published  - is a /res/ resource
                     93: #                       uploaded   - is a /uploaded/ resource
                     94: #                       contruct   - is a /priv/ resource
                     95: #      form.grade_target - a form parameter requesting a specific target
1.5       albertel   96: sub get_target {
1.204     albertel   97:     &Apache::lonxml::debug("request.state = $env{'request.state'}");
                     98:     if( defined($env{'form.grade_target'})) {
                     99: 	&Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
1.188     foxr      100:     } else {
1.189     albertel  101: 	&Apache::lonxml::debug("form.grade_target <undefined>");
1.188     foxr      102:     }
1.204     albertel  103:     if (($env{'request.state'} eq "published") ||
                    104: 	($env{'request.state'} eq "uploaded")) {
                    105: 	if ( defined($env{'form.grade_target'}  ) 
                    106: 	     && ($env{'form.grade_target'} eq 'tex')) {
                    107: 	    return ($env{'form.grade_target'});
                    108: 	} elsif ( defined($env{'form.grade_target'}  ) 
1.145     albertel  109: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.207     albertel  110: 	    return ($env{'form.grade_target'});
1.244     albertel  111: 	} elsif ( $env{'form.grade_target'} eq 'webgrade'
                    112: 		  && ($Apache::lonhomework::queuegrade eq 'F' )) {
                    113: 	    return ($env{'form.grade_target'});
1.207     albertel  114: 	}
                    115: 	if ($env{'form.webgrade'} &&
1.244     albertel  116: 	    ($Apache::lonhomework::modifygrades eq 'F'
                    117: 	     || $Apache::lonhomework::queuegrade eq 'F' )) {
1.207     albertel  118: 	    return ('grade','webgrade');
1.145     albertel  119: 	}
1.204     albertel  120: 	if ( defined($env{'form.submitted'}) &&
                    121: 	     ( !defined($env{'form.newrandomization'}))) {
1.217     albertel  122: 	    return ('grade', 'web');
1.145     albertel  123: 	} else {
1.217     albertel  124: 	    return ('web');
1.145     albertel  125: 	}
1.204     albertel  126:     } elsif ($env{'request.state'} eq "construct") {
                    127: 	if ( defined($env{'form.grade_target'}) ) {
                    128: 	    return ($env{'form.grade_target'});
1.145     albertel  129: 	}
1.204     albertel  130: 	if ( defined($env{'form.preview'})) {
                    131: 	    if ( defined($env{'form.submitted'})) {
1.145     albertel  132: 		return ('grade', 'web');
                    133: 	    } else {
                    134: 		return ('web');
                    135: 	    }
                    136: 	} else {
1.267     albertel  137: 	    if ($env{'form.problemstate'} eq 'WEB_GRADE') {
                    138: 		#$env{'form.webgrade'} = 'yes';
                    139: 		return ('grade','webgrade','answer');
                    140: 	    } elsif ( $env{'form.problemmode'} eq &mt('View') ||
1.204     albertel  141: 		 $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
                    142: 		if ( defined($env{'form.submitted'}) &&
                    143: 		     (!defined($env{'form.resetdata'})) &&
                    144: 		     (!defined($env{'form.newrandomization'}))) {
1.145     albertel  145: 		    return ('grade', 'web','answer');
                    146: 		} else {
                    147: 		    return ('web','answer');
                    148: 		}
1.204     albertel  149: 	    } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
                    150: 		      $env{'form.problemmode'} eq 'Edit') {
                    151: 		if ( $env{'form.submitted'} eq 'edit' ) {
1.281     albertel  152: 		    if ( $env{'form.submit'} eq &mt('Save and View') ) {
1.145     albertel  153: 			return ('modified','web','answer');
                    154: 		    } else {
1.211     albertel  155: 			return ('modified','no_output_web','edit');
1.145     albertel  156: 		    }
                    157: 		} else {
1.211     albertel  158: 		    return ('no_output_web','edit');
1.145     albertel  159: 		}
                    160: 	    } else {
                    161: 		return ('web');
                    162: 	    }
                    163: 	}
1.15      albertel  164:     }
1.145     albertel  165:     return ();
1.5       albertel  166: }
                    167: 
1.3       albertel  168: sub setup_vars {
1.145     albertel  169:     my ($target) = @_;
                    170:     return ';'
1.11      albertel  171: #  return ';$external::target='.$target.';';
1.2       albertel  172: }
                    173: 
1.36      albertel  174: sub createmenu {
1.145     albertel  175:     my ($which,$request)=@_;
                    176:     if ($which eq 'grade') {
                    177: 	$request->print('<script language="JavaScript"> 
1.91      albertel  178:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  179:                  "height=350,width=150,menubar=no");
                    180:           </script>');
1.145     albertel  181:     }
1.36      albertel  182: }
                    183: 
1.200     albertel  184: sub proctor_checked_in {
1.226     albertel  185:     my ($slot_name,$slot,$type)=@_;
                    186:     my @possible_proctors=split(",",$slot->{'proctor'});
                    187:     
1.248     albertel  188:     return 1 if (!@possible_proctors);
                    189: 
1.226     albertel  190:     my $key;
                    191:     if ($type eq 'Task') {
1.230     albertel  192: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
                    193: 	$key ="resource.$version.0.checkedin";
1.226     albertel  194:     } elsif ($type eq 'problem') {
                    195: 	$key ='resource.0.checkedin';
                    196:     }
1.249     albertel  197:     # backward compatability, used to be username@domain, 
                    198:     # now is username:domain
                    199:     my $who = $Apache::lonhomework::history{$key};
                    200:     if ($who !~ /:/) {
                    201: 	$who =~ tr/@/:/;
                    202:     }     
1.226     albertel  203:     foreach my $possible (@possible_proctors) { 
1.249     albertel  204: 	if ($who eq $possible
1.226     albertel  205: 	    && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
1.202     albertel  206: 	    return 1;
                    207: 	}
                    208:     }
1.226     albertel  209:     
1.200     albertel  210:     return 0;
                    211: }
                    212: 
1.152     albertel  213: sub check_ip_acc {
                    214:     my ($acc)=@_;
1.218     albertel  215:     &Apache::lonxml::debug("acc is $acc");
                    216:     if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) { 
                    217: 	return 1;
                    218:     }
1.152     albertel  219:     my $allowed=0;
1.272     albertel  220:     my $ip=$env{'request.host'} || $ENV{'REMOTE_ADDR'};
                    221: 
1.152     albertel  222:     my $name;
                    223:     foreach my $pattern (split(',',$acc)) {
1.233     albertel  224: 	$pattern =~ s/^\s*//;
                    225: 	$pattern =~ s/\s*$//;
1.152     albertel  226: 	if ($pattern =~ /\*$/) {
                    227: 	    #35.8.*
                    228: 	    $pattern=~s/\*//;
                    229: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    230: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    231: 	    #35.8.3.[34-56]
                    232: 	    my $low=$2;
                    233: 	    my $high=$3;
                    234: 	    $pattern=$1;
                    235: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    236: 		my $last=(split(/\./,$ip))[3];
                    237: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    238: 	    }
                    239: 	} elsif ($pattern =~ /^\*/) {
                    240: 	    #*.msu.edu
                    241: 	    $pattern=~s/\*//;
                    242: 	    if (!defined($name)) {
                    243: 		use Socket;
                    244: 		my $netaddr=inet_aton($ip);
                    245: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  246: 	    }
1.152     albertel  247: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    248: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    249: 	    #127.0.0.1
                    250: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    251: 	} else {
                    252: 	    #some.name.com
                    253: 	    if (!defined($name)) {
                    254: 		use Socket;
                    255: 		my $netaddr=inet_aton($ip);
                    256: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    257: 	    }
                    258: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    259: 	}
                    260: 	if ($allowed) { last; }
                    261:     }
                    262:     return $allowed;
                    263: }
1.198     albertel  264: 
1.226     albertel  265: sub check_slot_access {
                    266:     my ($id,$type)=@_;
                    267: 
1.207     albertel  268:     # does it pass normal muster
1.226     albertel  269:     my ($status,$datemsg)=&check_access($id);
                    270:     
1.252     albertel  271:     my $useslots = &Apache::lonnet::EXT("resource.0.useslots");
1.251     albertel  272:     if ($useslots ne 'resource' && $useslots ne 'map' 
                    273: 	&& $useslots ne 'map_map') {
1.226     albertel  274: 	return ($status,$datemsg);
                    275:     }
                    276: 
1.200     albertel  277:     if ($status eq 'SHOW_ANSWER' ||
                    278: 	$status eq 'CLOSED' ||
                    279: 	$status eq 'INVALID_ACCESS' ||
                    280: 	$status eq 'UNAVAILABLE') {
                    281: 	return ($status,$datemsg);
                    282:     }
1.204     albertel  283:     if ($env{'request.state'} eq "construct") {
1.203     albertel  284: 	return ($status,$datemsg);
                    285:     }
1.226     albertel  286:     
                    287:     if ($type eq 'Task') {
                    288: 	my $version=$Apache::lonhomework::history{'resource.version'};
1.230     albertel  289: 	if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
                    290: 	    $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
1.226     albertel  291: 	    return ('SHOW_ANSWER');
                    292: 	}
1.207     albertel  293:     }
1.226     albertel  294: 
1.210     albertel  295:     my @slots=
1.252     albertel  296: 	(split(':',&Apache::lonnet::EXT("resource.0.availablestudent")),
                    297: 	 split(':',&Apache::lonnet::EXT("resource.0.available")));
1.210     albertel  298: 
1.200     albertel  299: #    if (!@slots) {
                    300: #	return ($status,$datemsg);
                    301: #    }
                    302:     my $slotstatus='NOT_IN_A_SLOT';
1.206     albertel  303:     my ($returned_slot,$slot_name);
1.210     albertel  304:     foreach my $slot (@slots) {
1.241     albertel  305: 	$slot =~ s/(^\s*|\s*$)//g;
1.201     albertel  306: 	&Apache::lonxml::debug("getting $slot");
1.200     albertel  307: 	my %slot=&Apache::lonnet::get_slot($slot);
1.201     albertel  308: 	&Apache::lonhomework::showhash(%slot);
1.200     albertel  309: 	if ($slot{'starttime'} < time &&
                    310: 	    $slot{'endtime'} > time &&
1.201     albertel  311: 	    &check_ip_acc($slot{'ip'})) {
1.202     albertel  312: 	    &Apache::lonxml::debug("$slot is good");
                    313: 	    $slotstatus='NEEDS_CHECKIN';
                    314: 	    $returned_slot=\%slot;
1.206     albertel  315: 	    $slot_name=$slot;
1.200     albertel  316: 	    last;
                    317: 	}
                    318:     }
1.202     albertel  319:     if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.226     albertel  320: 	&proctor_checked_in($slot_name,$returned_slot,$type)) {
1.202     albertel  321: 	&Apache::lonxml::debug("protoctor checked in");
1.200     albertel  322: 	$slotstatus='CAN_ANSWER';
                    323:     }
1.226     albertel  324: 
1.235     albertel  325:     my ($is_correct,$got_grade,$checkedin);
1.226     albertel  326:     if ($type eq 'Task') {
1.230     albertel  327: 	my $version=$Apache::lonhomework::history{'resource.0.version'};
1.231     albertel  328: 	$got_grade = 
                    329: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} 
                    330: 	     =~ /^(?:pass|fail)$/);
1.235     albertel  331: 	$is_correct =  
                    332: 	    ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
                    333: 	     || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
1.226     albertel  334: 	$checkedin =
1.230     albertel  335: 	    $Apache::lonhomework::history{"resource.$version.0.checkedin"};
1.226     albertel  336:     } elsif ($type eq 'problem') {
1.252     albertel  337: 	$got_grade  = 1;
                    338: 	$checkedin  = $Apache::lonhomework::history{"resource.0.checkedin"};
                    339: 	$is_correct =
                    340: 	    ($Apache::lonhomework::history{"resource.0.solved"} =~/^correct_/);
1.226     albertel  341:     }
                    342:     
1.235     albertel  343:     &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
                    344:     
1.243     albertel  345:     # no slot is currently open, and has been checked in for this version
                    346:     # but hasn't got a grade, therefore must be awaiting a grade
                    347:     if (!defined($slot_name)
                    348: 	&& $checkedin 
1.236     albertel  349: 	&& !$got_grade) {
                    350: 	return ('WAITING_FOR_GRADE');
                    351:     }
                    352: 
1.252     albertel  353:     # no slot is currently open, and has been checked in for this version
                    354:     # previous slot is therefore CLOSED, so therefore the problem is
                    355:     if (!defined($slot_name)
                    356: 	&& $checkedin 
                    357: 	&& $type eq 'problem') {
                    358: 	return ('CLOSED',$datemsg);
                    359:     }
                    360: 
1.226     albertel  361:     if ($slotstatus eq 'NOT_IN_A_SLOT' 
                    362: 	&& $checkedin ) {
                    363: 
1.231     albertel  364: 	if ($got_grade) {
1.209     albertel  365: 	    return ('SHOW_ANSWER');
                    366: 	} else {
                    367: 	    return ('WAITING_FOR_GRADE');
                    368: 	}
1.226     albertel  369: 
1.207     albertel  370:     }
1.255     albertel  371: 
1.235     albertel  372:     if ( $is_correct) {
1.255     albertel  373: 	if ($type eq 'problem') {
                    374: 	    return ($status);
                    375: 	}
1.235     albertel  376: 	return ('SHOW_ANSWER');
                    377:     }
1.255     albertel  378: 
1.225     albertel  379:     if ( $status eq 'CANNOT_ANSWER' && 
                    380: 	 ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
                    381: 	return ($status,$datemsg);
                    382:     }
                    383: 
1.206     albertel  384:     return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198     albertel  385: }
1.200     albertel  386: 
1.92      bowersj2  387: # JB, 9/24/2002: Any changes in this function may require a change
                    388: # in lonnavmaps::resource::getDateStatus.
1.53      www       389: sub check_access {
1.145     albertel  390:     my ($id) = @_;
                    391:     my $date ='';
                    392:     my $status;
                    393:     my $datemsg = '';
                    394:     my $lastdate = '';
                    395:     my $type;
                    396:     my $passed;
                    397: 
1.204     albertel  398:     if ($env{'request.state'} eq "construct") {
                    399: 	if ($env{'form.problemstate'}) {
                    400: 	    if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.277     albertel  401: 		if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' 
                    402: 			&& &hide_problem_status())) {
1.168     albertel  403: 		    return ('CANNOT_ANSWER',
1.174     www       404: 			    &mt('is in this state due to author settings.'));
1.167     albertel  405: 		}
1.165     albertel  406: 	    } else {
1.204     albertel  407: 		return ($env{'form.problemstate'},
1.174     www       408: 			&mt('is in this state due to author settings.'));
1.165     albertel  409: 	    }
                    410: 	}
1.145     albertel  411: 	&Apache::lonxml::debug("in construction ignoring dates");
                    412: 	$status='CAN_ANSWER';
1.146     albertel  413: 	$datemsg=&mt('is in under construction');
1.163     albertel  414: #	return ($status,$datemsg);
1.145     albertel  415:     }
                    416: 
                    417:     &Apache::lonxml::debug("checking for part :$id:");
                    418:     &Apache::lonxml::debug("time:".time);
1.152     albertel  419: 
1.261     albertel  420:     my ($symb)=&Apache::lonnet::whichuser();
1.212     albertel  421:     &Apache::lonxml::debug("symb:".$symb);
                    422:     #if ($env{'request.state'} ne "construct" && $symb ne '') {
1.204     albertel  423:     if ($env{'request.state'} ne "construct") {
1.163     albertel  424: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    425: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    426: 	    $status='INVALID_ACCESS';
                    427: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  428: 	    return($status,$date);
                    429: 	}
1.163     albertel  430: 	
1.226     albertel  431: 	foreach my $temp ("opendate","duedate","answerdate") {
1.163     albertel  432: 	    $lastdate = $date;
1.247     albertel  433: 	    if ($temp eq 'duedate') {
                    434: 		$date = &due_date($id);
                    435: 	    } else {
                    436: 		$date = &Apache::lonnet::EXT("resource.$id.$temp");
                    437: 	    }
                    438: 	    
1.163     albertel  439: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    440: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    441: 		$date     =~ /^(con_lost|no_such_host)/) {
                    442: 		$status='UNAVAILABLE';
                    443: 		$date=&mt("may open later.");
                    444: 		return($status,$date);
                    445: 	    }
                    446: 	    if ($thistype eq 'date_interval') {
                    447: 		if ($temp eq 'opendate') {
                    448: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    449: 		}
                    450: 		if ($temp eq 'answerdate') {
                    451: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    452: 		}
1.145     albertel  453: 	    }
1.163     albertel  454: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    455: 	    if ($date eq '') {
                    456: 		$date = &mt("an unknown date"); $passed = 0;
                    457: 	    } elsif ($date eq 'con_lost') {
                    458: 		$date = &mt("an indeterminate date"); $passed = 0;
                    459: 	    } else {
                    460: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
1.274     www       461: 		$date = &Apache::lonlocal::locallocaltime($date);
1.145     albertel  462: 	    }
1.163     albertel  463: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  464: 	}
1.163     albertel  465: 	&Apache::lonxml::debug("have :$type:$passed:");
                    466: 	if ($passed) {
                    467: 	    $status='SHOW_ANSWER';
                    468: 	    $datemsg=$date;
                    469: 	} elsif ($type eq 'opendate') {
                    470: 	    $status='CLOSED';
                    471: 	    $datemsg = &mt("will open on")." $date";
                    472: 	} elsif ($type eq 'duedate') {
                    473: 	    $status='CAN_ANSWER';
                    474: 	    $datemsg = &mt("is due at")." $date";
                    475: 	} elsif ($type eq 'answerdate') {
                    476: 	    $status='CLOSED';
                    477: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  478: 	}
                    479:     }
1.212     albertel  480:     if ($status eq 'CAN_ANSWER' ||
                    481: 	(($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
1.145     albertel  482: 	#check #tries, and if correct.
                    483: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    484: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    485: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  486: 	if ( $maxtries eq '' && 
1.204     albertel  487: 	     $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
1.164     albertel  488: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  489: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    490: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    491: 	    &&
1.277     albertel  492: 	    &show_problem_status())
1.145     albertel  493: 	   ||
                    494: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    495: 	    $status = 'CANNOT_ANSWER';
                    496: 	}
1.121     albertel  497:     }
1.181     albertel  498:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177     albertel  499: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
                    500: 	&Apache::lonxml::debug("looking for interval $interval");
                    501: 	if ($interval) {
                    502: 	    my $first_access=&Apache::lonnet::get_first_access('map');
                    503: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    504: 	    if (!$first_access) {
                    505: 		$status='NOT_YET_VIEWED';
1.247     albertel  506: 		my $due_date = &due_date($id);
1.256     albertel  507: 		my $seconds_left = $due_date - time;
                    508: 		if ($seconds_left > $interval || $due_date eq '') {
                    509: 		    $seconds_left = $interval;
                    510: 		}
                    511: 		$datemsg=&seconds_to_human_length($seconds_left);
1.177     albertel  512: 	    }
                    513: 	}
                    514:     }
1.247     albertel  515: 
1.133     albertel  516:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    517:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    518:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    519:   #}
1.54      www       520: 
                    521: 
1.145     albertel  522:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    523:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    524: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    525: 	$status='CAN_ANSWER';
1.146     albertel  526: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  527:     }
1.106     albertel  528: 
1.145     albertel  529:     return ($status,$datemsg);
1.20      albertel  530: }
1.247     albertel  531: # this should work exactly like the copy in lonnavmaps.pm
1.246     albertel  532: sub due_date {
1.250     albertel  533:     my ($part_id,$symb,$udom,$uname)=@_;
1.246     albertel  534:     my $date;
1.250     albertel  535:     my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb,
                    536: 				       $udom,$uname);
1.247     albertel  537:     &Apache::lonxml::debug("looking for interval $part_id $symb $interval");
1.250     albertel  538:     my $due_date= &Apache::lonnet::EXT("resource.$part_id.duedate",$symb,
                    539: 				       $udom,$uname);
1.247     albertel  540:     &Apache::lonxml::debug("looking for due_date $part_id $symb $due_date");
1.257     albertel  541:     if ($interval =~ /\d+/) {
1.246     albertel  542: 	my $first_access=&Apache::lonnet::get_first_access('map',$symb);
1.257     albertel  543: 	&Apache::lonxml::debug("looking for first_access $first_access");
1.247     albertel  544: 	if (defined($first_access)) {
                    545: 	    $interval = $first_access+$interval;
1.283     albertel  546: 	    $date = (!$due_date || $interval < $due_date) ? $interval
                    547:                                                           : $due_date;
1.247     albertel  548: 	} else {
                    549: 	    $date = $due_date;
                    550: 	}
                    551:     } else {
                    552: 	$date = $due_date;
1.246     albertel  553:     }
                    554:     return $date
                    555: }
                    556: 
1.192     albertel  557: sub seconds_to_human_length {
                    558:     my ($length)=@_;
                    559: 
                    560:     my $seconds=$length%60; $length=int($length/60);
                    561:     my $minutes=$length%60; $length=int($length/60);
                    562:     my $hours=$length%24;   $length=int($length/24);
                    563:     my $days=$length;
                    564: 
                    565:     my $timestr;
                    566:     if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
                    567:     if ($hours > 0) { $timestr.=($timestr?", ":"").
                    568: 			  &mt('[quant,_1,hour]',$hours); }
                    569:     if ($minutes > 0) { $timestr.=($timestr?", ":"").
                    570: 			    &mt('[quant,_1,minute]',$minutes); }
                    571:     if ($seconds > 0) { $timestr.=($timestr?", ":"").
                    572: 			    &mt('[quant,_1,second]',$seconds); }
                    573:     return $timestr;
                    574: }
                    575: 
1.41      albertel  576: sub showhash {
1.145     albertel  577:     my (%hash) = @_;
                    578:     &showhashsubset(\%hash,'.');
                    579:     return '';
1.79      albertel  580: }
                    581: 
1.106     albertel  582: sub showarray {
                    583:     my ($array)=@_;
                    584:     my $string="(";
                    585:     foreach my $elm (@{ $array }) {
1.193     albertel  586: 	if (ref($elm) eq 'ARRAY') {
                    587: 	    $string.=&showarray($elm);
                    588: 	} elsif (ref($elm) eq 'HASH') {
                    589: 	    $string.= "HASH --- \n<br />";
                    590: 	    $string.= &showhashsubset($elm,'.');
1.106     albertel  591: 	} else {
                    592: 	    $string.="$elm,"
                    593: 	}
                    594:     }
                    595:     chop($string);
                    596:     $string.=")";
                    597:     return $string;
                    598: }
                    599: 
1.79      albertel  600: sub showhashsubset {
1.145     albertel  601:     my ($hash,$keyre) = @_;
                    602:     my $resultkey;
                    603:     foreach $resultkey (sort keys %$hash) {
1.193     albertel  604: 	if ($resultkey !~ /$keyre/) { next; }
                    605: 	if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
                    606: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    607: 				   &showarray($$hash{$resultkey}));
                    608: 	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
                    609: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    610: 	    &showhashsubset($$hash{$resultkey},'.');
                    611: 	} else {
                    612: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145     albertel  613: 	}
                    614:     }
                    615:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    616:     return '';
1.41      albertel  617: }
                    618: 
                    619: sub setuppermissions {
1.204     albertel  620:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
                    621:     my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145     albertel  622:     if (! $viewgrades && 
1.204     albertel  623: 	exists($env{'request.course.sec'}) && 
                    624: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    625: 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                    626:                                                '/'.$env{'request.course.sec'});
1.145     albertel  627:     }
1.244     albertel  628:     $Apache::lonhomework::viewgrades = $viewgrades;
                    629: 
1.185     albertel  630:     if ($Apache::lonhomework::browse eq 'F' && 
1.204     albertel  631: 	$env{'form.devalidatecourseresdata'} eq 'on') {
1.261     albertel  632: 	my (undef,$courseid) = &Apache::lonnet::whichuser();
1.204     albertel  633: 	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
                    634: 					      $env{"course.$courseid.domain"});
1.185     albertel  635:     }
1.244     albertel  636: 
1.205     albertel  637:     my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
                    638:     if (! $modifygrades && 
                    639: 	exists($env{'request.course.sec'}) && 
                    640: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    641: 	$modifygrades = 
                    642: 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
                    643: 				     '/'.$env{'request.course.sec'});
                    644:     }
                    645:     $Apache::lonhomework::modifygrades = $modifygrades;
1.244     albertel  646: 
                    647:     my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
                    648:     if (! $queuegrade && 
                    649: 	exists($env{'request.course.sec'}) && 
                    650: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    651: 	$queuegrade = 
                    652: 	    &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
                    653: 				     '/'.$env{'request.course.sec'});
                    654:     }
                    655:     $Apache::lonhomework::queuegrade = $queuegrade;
1.205     albertel  656:     return '';
1.41      albertel  657: }
                    658: 
1.253     albertel  659: sub unset_permissions {
                    660:     undef($Apache::lonhomework::queuegrade);
                    661:     undef($Apache::lonhomework::modifygrades);
                    662:     undef($Apache::lonhomework::viewgrades);
                    663:     undef($Apache::lonhomework::browse);
                    664: }
                    665: 
1.41      albertel  666: sub setupheader {
1.120     albertel  667:     my $request=$_[0];
1.197     albertel  668:     &Apache::loncommon::content_type($request,'text/html');
1.120     albertel  669:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    670: 	&Apache::loncommon::no_cache($request);
                    671:     }
1.196     albertel  672: #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                    673: #							  'lastrevisiondate'));
1.120     albertel  674:     $request->send_http_header;
                    675:     return OK if $request->header_only;
                    676:     return ''
1.41      albertel  677: }
1.35      albertel  678: 
1.47      albertel  679: sub handle_save_or_undo {
1.145     albertel  680:     my ($request,$problem,$result) = @_;
                    681:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    682:     my $filebak =$file.".bak";
                    683:     my $filetmp =$file.".tmp";
                    684:     my $error=0;
1.204     albertel  685:     if ($env{'form.Undo'} eq &mt('undo')) {
1.145     albertel  686: 	my $error=0;
1.284   ! albertel  687: 	if (!&File::Copy::copy($file,$filetmp)) { $error=1; }
        !           688: 	if ((!$error) && (!&File::Copy::copy($filebak,$file))) { $error=1; }
        !           689: 	if ((!$error) && (!&File::Copy::move($filetmp,$filebak))) { $error=1; }
1.145     albertel  690: 	if (!$error) {
1.266     albertel  691: 	    &Apache::lonxml::info("<p><b>".
                    692: 				  &mt("Undid changes, Switched [_1] and [_2]",
                    693: 				      '<span class="LC_filename">'.$filebak.
                    694: 				      '</span>',
                    695: 				      '<span class="LC_filename">'.$file.
                    696: 				      '</span>')."</b></p>");
1.145     albertel  697: 	} else {
1.266     albertel  698: 	    &Apache::lonxml::info("<p><span class=\"LC_error\">".
                    699: 				  &mt("Unable to undo, unable to switch [_1] and [_2]",
                    700: 				      '<span class="LC_filename">'.
                    701: 				      $filebak.'</span>',
                    702: 				      '<span class="LC_filename">'.
                    703: 				      $file.'</span>')."</span></p>");
1.145     albertel  704: 	    $error=1;
                    705: 	}
1.52      albertel  706:     } else {
1.262     banghart  707:         &Apache::lonnet::correct_line_ends($result);
1.145     albertel  708: 	my $fs=Apache::File->new(">$filebak");
                    709: 	if (defined($fs)) {
                    710: 	    print $fs $$problem;
1.266     albertel  711: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to [_1]",
                    712: 					    '<span class="LC_filename">'.
                    713: 					    $filebak.'</span>').
                    714: 				  "</b>");
1.145     albertel  715: 	} else {
1.266     albertel  716: 	    &Apache::lonxml::info("<span class=\"LC_error\">".
                    717: 				  &mt("Unable to make backup [_1]",
                    718: 				      '<span class="LC_filename">'.
                    719: 				      $filebak.'</span>')."</span>");
1.145     albertel  720: 	    $error=2;
                    721: 	}
                    722: 	my $fh=Apache::File->new(">$file");
                    723: 	if (defined($fh)) {
                    724: 	    print $fh $$result;
1.266     albertel  725: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to [_1]",
                    726: 					   '<span class="LC_filename">'.
                    727: 					    $file.'</span>' )."</b>");
1.145     albertel  728: 	} else {
1.266     albertel  729: 	    &Apache::lonxml::info('<span class="LC_error">'.
                    730: 				  &mt("Unable to write to [_1]",
                    731: 				      '<span class="LC_filename">'.
                    732: 				      $file.'</span>').
                    733: 				  '</span>');
1.145     albertel  734: 	    $error|=4;
                    735: 	}
1.52      albertel  736:     }
1.145     albertel  737:     return $error;
1.64      albertel  738: }
                    739: 
1.101     albertel  740: sub analyze_header {
                    741:     my ($request) = @_;
1.238     albertel  742:     my $result =
1.240     albertel  743: 	&Apache::loncommon::start_page('Analyzing a problem',undef);
                    744: 
1.238     albertel  745:     $result .= 
                    746: 	&Apache::lonxml::message_location().'
1.101     albertel  747:             <form name="lonhomework" method="POST" action="'.
1.204     albertel  748: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  749: 	    &Apache::structuretags::remember_problem_state().'
1.278     albertel  750:             <div class="LC_edit_problem_analyze_header">
1.146     albertel  751:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    752:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.278     albertel  753:             <hr class="LC_edit_problem_divide" />
                    754: 
1.146     albertel  755:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.278     albertel  756:             <hr class="LC_edit_problem_divide" />
                    757:             </div>
1.101     albertel  758:             </form>';
1.171     albertel  759:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  760:     $request->print($result);
                    761:     $request->rflush();
                    762: }
                    763: 
1.109     albertel  764: sub analyze_footer {
                    765:     my ($request) = @_;
1.237     albertel  766:     $request->print(&Apache::loncommon::end_page());
1.109     albertel  767:     $request->rflush();
                    768: }
                    769: 
1.74      albertel  770: sub analyze {
1.101     albertel  771:     my ($request,$file) = @_;
                    772:     &Apache::lonxml::debug("Analyze");
                    773:     my $result;
                    774:     my %overall;
1.219     www       775:     my %seedexample;
1.101     albertel  776:     my %allparts;
1.204     albertel  777:     my $rndseed=$env{'form.rndseed'};
1.101     albertel  778:     &analyze_header($request);
1.114     albertel  779:     my %prog_state=
1.146     albertel  780: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    781: 					      &mt('Getting Problem Variants'),
1.204     albertel  782: 					      $env{'form.numtoanalyze'},
1.175     albertel  783: 					      'inline',undef);
1.204     albertel  784:     for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  785: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  786: 						 &mt('last problem'));
1.182     albertel  787: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.219     www       788:         my $thisseed=$i+$rndseed;
1.101     albertel  789: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    790: 					   ('grade_target' => 'analyze'),
1.219     www       791: 					   ('rndseed' => $thisseed));
1.101     albertel  792: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    793: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  794: 	my @parts;
                    795: 	if (defined(@{ $analyze{'parts'} })) {
                    796: 	    @parts=@{ $analyze{'parts'} };
                    797: 	}
1.101     albertel  798: 	foreach my $part (@parts) {
                    799: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  800: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    801: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    802: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.263     albertel  803: 		foreach my $name (keys(%{ $analyze{$part.'.answer'} })) {
                    804: 		    my $i=0;
                    805: 		    foreach my $answer_part (@{ $analyze{$part.'.answer'}{$name} }) {
                    806: 			push( @{ $overall{$part.'.answer'}[$i] },
                    807: 			      $answer_part);
                    808: 			my $concatanswer= join("\0",@{ $answer_part });
                    809: 			if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
1.266     albertel  810: 			    $answer_part = ['<span class="LC_error">'.&mt('Error').'</span>'];
1.263     albertel  811: 			}
                    812: 			$seedexample{join("\0",$part,$i,@{$answer_part})}=
                    813: 			    $thisseed;
                    814: 			$i++;
                    815: 		    }
1.219     www       816: 		}
1.275     albertel  817: 		if (!keys(%{ $analyze{$part.'.answer'} })) {
                    818: 		    my $answer_part = 
                    819: 			['<span class="LC_error">'.&mt('Error').'</span>'];
                    820: 		    $seedexample{join("\0",$part,0,@{$answer_part})}=
                    821: 			$thisseed;
                    822: 		    push( @{ $overall{$part.'.answer'}[0] },
                    823: 			  $answer_part);
                    824: 		}
1.101     albertel  825: 	    }
                    826: 	}
                    827:     }
1.114     albertel  828:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  829: 					  &mt('Analyzing Results'));
1.278     albertel  830:     $request->print('<hr class="LC_edit_problem_divide" />'.&mt('List of possible answers').': ');
1.134     albertel  831:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  832: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.263     albertel  833: 	    for (my $i=0;$i<scalar(@{ $overall{$part.'.answer'} });$i++) {
                    834: 		my $num_cols=scalar(@{ $overall{$part.'.answer'}[$i][0] });
                    835: 		$request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part);
                    836: 		if (scalar(@{ $overall{$part.'.answer'} }) > 1) {
                    837: 		    $request->print(&mt(' Answer [_1]',$i+1));
                    838: 		}
                    839: 		$request->print('</th></tr>');
                    840: 		my %frequency;
                    841: 		foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'}[$i] })) {
                    842: 		    $frequency{join("\0",@{ $answer })}++;
                    843: 		}
                    844: 		$request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
                    845: 				.&mt('click for example').')</th></tr>');
                    846: 		foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    847: 		    $request->print('<tr><td class="center">'.
                    848: 				    join('</td><td class="center">',split("\0",$answer)).
                    849: 				    '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{join("\0",$part,$i,$answer)}.'">'.$frequency{$answer}.
                    850: 				    '</a></td></tr>');
                    851: 		}
                    852: 		$request->print('</table>');
1.109     albertel  853: 	    }
                    854: 	} else {
1.162     albertel  855: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  856: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  857: 	}
                    858:     }
1.130     albertel  859:     if (scalar(keys(%allparts)) == 0 ) {
1.215     raeburn   860: 	$request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  861:     }
1.114     albertel  862:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  863:     &analyze_footer($request);
1.101     albertel  864:     &Apache::lonhomework::showhash(%overall);
                    865:     return $result;
1.74      albertel  866: }
                    867: 
1.277     albertel  868: {
                    869:     my $show_problem_status;
                    870:     sub reset_show_problem_status {
                    871: 	undef($show_problem_status);
                    872:     }
                    873: 
                    874:     sub set_show_problem_status {
                    875: 	my ($new_status) = @_;
                    876: 	$show_problem_status = lc($new_status);
                    877:     }
                    878: 
                    879:     sub hide_problem_status {
                    880: 	return ($show_problem_status eq 'no'
                    881: 		|| $show_problem_status eq 'no_feedback_ever');
                    882:     }
                    883: 
                    884:     sub show_problem_status {
                    885: 	return ($show_problem_status eq 'yes'
                    886: 		|| $show_problem_status eq '');
                    887:     }
                    888:     
                    889:     sub show_some_problem_status {
                    890: 	return ($show_problem_status eq 'no');
                    891:     }
                    892: 
                    893:     sub show_no_problem_status {
                    894: 	return ($show_problem_status eq 'no_feedback_ever');
                    895:     }
                    896: }
                    897: 
1.64      albertel  898: sub editxmlmode {
1.145     albertel  899:     my ($request,$file) = @_;
                    900:     my $result;
                    901:     my $problem=&Apache::lonnet::getfile($file);
                    902:     if ($problem eq -1) {
1.146     albertel  903: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    904: 			       " <i>$file</i></b>");
1.145     albertel  905: 	$problem='';
                    906:     }
1.204     albertel  907:     if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
1.145     albertel  908: 	my $error=&handle_save_or_undo($request,\$problem,
1.204     albertel  909: 				       \$env{'form.editxmltext'});
1.145     albertel  910: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    911:     }
1.204     albertel  912:     &Apache::lonhomework::showhashsubset(\%env,'^form');
1.281     albertel  913:     if ( $env{'form.submit'} eq &mt('Save and View') ) {
1.204     albertel  914: 	&Apache::lonhomework::showhashsubset(\%env,'^form');
                    915: 	$env{'form.problemmode'}='View';
1.145     albertel  916: 	&renderpage($request,$file);
                    917:     } else {
                    918: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       919: 	my $xml_help = '<table><tr><td>'.
                    920: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    921: 						    "Problem Editing Help").
                    922: 						    '</td><td>'.
1.254     albertel  923:        &Apache::loncommon::help_open_menu(undef,undef,5,'Authoring').
1.178     albertel  924:                 '</td></tr></table>';
1.145     albertel  925: 	if ($cols > 80) { $cols = 80; }
                    926: 	if ($cols < 70) { $cols = 70; }
                    927: 	if ($rows < 20) { $rows = 20; }
1.269     albertel  928: 	my $js =
                    929: 	    &Apache::edit::js_change_detection(). 
                    930: 	    &Apache::loncommon::resize_textarea_js();
1.270     albertel  931: 	my $only_body =  ($env{'environment.remote'} eq 'off')? 0 : 1;
1.238     albertel  932: 	my $start_page = 
1.269     albertel  933: 	    &Apache::loncommon::start_page(&mt("EditXML [_1]",$file),$js,
                    934: 					   {'no_auto_mt_title' => 1,
1.270     albertel  935: 					    'only_body'        => $only_body,
1.269     albertel  936: 					    'add_entries'      => {
                    937: 						'onresize' => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
                    938: 						'onload'   => q[resize_textarea('LC_editxmltext','LC_aftertextarea')],
                    939: 				    }});
1.227     albertel  940: 
1.238     albertel  941: 	$result.=$start_page.
1.213     albertel  942: 	    &renderpage($request,$file,['no_output_web'],1).
1.281     albertel  943:             '<form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
1.204     albertel  944: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  945: 	    &Apache::structuretags::remember_problem_state().'
1.278     albertel  946:             <div class="LC_edit_problem_editxml_header">
1.280     albertel  947:               <table class="LC_edit_problem_header_title"><tr><td>
                    948:                '.&mt('Problem Editing').&Apache::loncommon::help_open_topic('Problem_Editor_XML_Index').'
                    949:                 </td><td align="right">
                    950:                   '.&Apache::loncommon::helpLatexCheatsheet().'
                    951:                 </td></tr>
                    952:               </table>
                    953:               <div class="LC_edit_problem_discards">
                    954:                 <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
                    955:                 <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    956:                 <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                    957:                 <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
                    958:               </div>
                    959:               <div class="LC_edit_problem_saves">
                    960:                 <input type="submit" name="submit" accesskey="s" value="'.&mt('Save').'" />
                    961:                 <input type="submit" name="submit" accesskey="v" value="'.&mt('Save and View').'" />
                    962:               </div>
                    963:               <hr class="LC_edit_problem_divide" />
1.281     albertel  964: 	      '.&Apache::lonxml::message_location().'
1.278     albertel  965:             </div>
1.280     albertel  966:             '  . '
1.269     albertel  967:             <textarea '.&Apache::edit::element_change_detection().
                    968: 	              ' rows="'.$rows.'" cols="'.$cols.'" style="width:100%" '.
                    969: 		      ' name="editxmltext" id="LC_editxmltext">'.
                    970: 		      &HTML::Entities::encode($problem,'<>&"').'</textarea>
                    971:             <div id="LC_aftertextarea">
                    972:             </div>
1.238     albertel  973:             </form>'.&Apache::loncommon::end_page();
1.171     albertel  974: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  975: 	$request->print($result);
                    976:     }
                    977:     return '';
1.47      albertel  978: }
1.189     albertel  979: 
1.188     foxr      980: #
                    981: #    Render the page in whatever target desired.
                    982: #
1.41      albertel  983: sub renderpage {
1.213     albertel  984:     my ($request,$file,$targets,$return_string) = @_;
1.52      albertel  985: 
1.211     albertel  986:     my @targets = @{$targets || [&get_target()]};
1.204     albertel  987:     &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145     albertel  988:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.268     albertel  989: 
1.171     albertel  990:     my $overall_result;
1.145     albertel  991:     foreach my $target (@targets) {
1.183     albertel  992: 	# FIXME need to do something intelligent when a problem goes
                    993:         # from viewable to not viewable due to map conditions
                    994: 	#&setuppermissions();
                    995: 	#if (   $Apache::lonhomework::browse ne '2'
                    996: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                    997: 	#    $request->print(" You most likely shouldn't see me.");
                    998: 	#}
1.145     albertel  999: 	#my $t0 = [&gettimeofday()];
1.211     albertel 1000: 	my $output=1;
                   1001: 	if ($target eq 'no_output_web') {
                   1002: 	    $target = 'web'; $output=0;
                   1003: 	}
1.145     albertel 1004: 	my $problem=&Apache::lonnet::getfile($file);
1.222     albertel 1005: 	my $result;
1.145     albertel 1006: 	if ($problem eq -1) {
1.260     albertel 1007: 	    $problem='';
1.222     albertel 1008: 	    my $filename=(split('/',$file))[-1];
1.260     albertel 1009: 	    my $error =
                   1010: 		"<b> ".&mt('Unable to find [_1]',
                   1011: 			   ' <span class="LC_filename">'.$filename.'</span>')
                   1012: 		."</b>";
                   1013: 	    $result.=
                   1014: 		&Apache::loncommon::simple_error_page($request,'Not available',
                   1015: 						      $error);
                   1016: 	    return;
1.145     albertel 1017: 	}
1.52      albertel 1018: 
1.145     albertel 1019: 	my %mystyle;
                   1020: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                   1021: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204     albertel 1022: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145     albertel 1023: 
                   1024: 	&Apache::lonxml::debug("Should be parsing now");
1.222     albertel 1025: 	$result .= &Apache::lonxml::xmlparse($request, $target, $problem,
                   1026: 					     &setup_vars($target),%mystyle);
1.273     albertel 1027: 	&finished_parsing();
1.214     albertel 1028: 	if (!$output) { $result = ''; }
1.145     albertel 1029: 	#$request->print("Result follows:");
                   1030: 	if ($target eq 'modified') {
                   1031: 	    &handle_save_or_undo($request,\$problem,\$result);
                   1032: 	} else {
                   1033: 	    if ($target eq 'analyze') {
                   1034: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                   1035: 		undef(%Apache::lonhomework::analyze);
                   1036: 	    }
                   1037: 	    #my $td=&tv_interval($t0);
                   1038: 	    #if ( $Apache::lonxml::debug) {
                   1039: 	    #$result =~ s:</body>::;
                   1040: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                   1041: 	    #}
1.171     albertel 1042: #	    $request->print($result);
                   1043: 	    $overall_result.=$result;
                   1044: #	    $request->rflush();
1.145     albertel 1045: 	}
                   1046: 	#$request->print(":Result ends");
                   1047: 	#my $td=&tv_interval($t0);
1.52      albertel 1048:     }
1.213     albertel 1049:     if (!$return_string) {
                   1050: 	&Apache::lonxml::add_messages(\$overall_result);
                   1051: 	$request->print($overall_result);   
                   1052: 	$request->rflush();   
                   1053:     } else {
                   1054: 	return $overall_result;
                   1055:     }
1.41      albertel 1056: }
                   1057: 
1.273     albertel 1058: sub finished_parsing {
                   1059:     undef($Apache::lonhomework::parsing_a_problem);
                   1060:     undef($Apache::lonhomework::parsing_a_task);
                   1061: }
                   1062: 
1.42      albertel 1063: sub get_template_list {
1.282     albertel 1064:     my ($extension) = @_;
1.145     albertel 1065:     my $result;
                   1066:     my @allnames;
                   1067:     &Apache::lonxml::debug("Looking for :$extension:");
1.282     albertel 1068:     my $glob_extension  = $extension;
                   1069:     if ($extension eq 'survey' || $extension eq 'exam') {
                   1070: 	$glob_extension = 'problem';
                   1071:     }
                   1072:     my @files = glob($Apache::lonnet::perlvar{'lonIncludes'}.
                   1073: 		     '/templates/*.'.$glob_extension);
                   1074:     @files = map {[$_,&mt(&Apache::lonnet::metadata($_, 'title'))]} (@files);
                   1075:     @files = sort {$a->[1] cmp $b->[1]} (@files);
                   1076:     foreach my $file (@files) {
                   1077: 	next if ($file->[1] !~ /\S/);
                   1078: 	$result .=
                   1079: 	    '<label><input type="radio" name="template" value="'.$file->[0].'" />'.
                   1080: 	    $file->[1].'</label><br />';
1.42      albertel 1081:     }
1.145     albertel 1082:     return $result;
1.42      albertel 1083: }
                   1084: 
                   1085: sub newproblem {
1.65      matthew  1086:     my ($request) = @_;
1.282     albertel 1087: 
                   1088:     if ($env{'form.template'}) {
                   1089: 	my $file = $env{'form.template'};
1.65      matthew  1090: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1091: 	&File::Copy::copy($file,$dest);
1.65      matthew  1092: 	&renderpage($request,$dest);
1.282     albertel 1093: 	return;
                   1094:     }
                   1095: 
                   1096:     my ($extension) = ($request->uri =~ m/\.(\w+)$/);
                   1097:     &Apache::lonxml::debug("Looking for :$extension:");
                   1098:     my $templatelist=&get_template_list($extension);
                   1099:     if ($env{'form.newfile'} && !$templatelist) {
                   1100: 	# no templates found
1.131     albertel 1101: 	my $templatefilename =
1.258     albertel 1102: 	    $request->dir_config('lonIncludes').'/templates/blank.'.$extension;
1.131     albertel 1103: 	&Apache::lonxml::debug("$templatefilename");
                   1104: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.282     albertel 1105: 	&File::Copy::copy($templatefilename,$dest);
1.131     albertel 1106: 	&renderpage($request,$dest);
1.85      albertel 1107:     } else {
1.176     albertel 1108: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                   1109: 	my $shownurl=$url;	
1.157     albertel 1110: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew  1111: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel 1112: 	my $errormsg;
1.85      albertel 1113: 	my $instructions;
1.240     albertel 1114: 	my $start_page = 
                   1115: 	    &Apache::loncommon::start_page("Create New $extension");
1.258     albertel 1116: 	$request->print("
1.240     albertel 1117: $start_page
1.258     albertel 1118: <h1>".&mt("Creating a new $extension resource.")."</h1>
1.128     albertel 1119: $errormsg
1.258     albertel 1120: ".&mt("The requested file [_1] currently does not exist.",
                   1121:       "<tt>$shownurl</tt>")."
1.105     www      1122: <p>
1.258     albertel 1123: <b>
                   1124: ".&mt("To create a new $extension, select a template from the".
1.282     albertel 1125:       " list below. Then click on the \"Create $extension\" button.")."</b>
1.259     albertel 1126: </p><form action=\"$url\" method=\"POST\">");
1.258     albertel 1127: 
1.85      albertel 1128: 	if (defined($templatelist)) {
1.282     albertel 1129: 	    $request->print($templatelist);
1.85      albertel 1130: 	}
1.282     albertel 1131: 	$request->print('<br /><input type="submit" name="newfile" value="'.
                   1132: 			&mt("Create $extension").'" />');
1.238     albertel 1133: 	$request->print("</form></p>".&Apache::loncommon::end_page());
1.65      matthew  1134:     }
1.282     albertel 1135:     return;
1.42      albertel 1136: }
                   1137: 
1.268     albertel 1138: sub update_construct_style {
                   1139:     if ($env{'request.state'} eq "construct"
                   1140: 	&& $env{'form.problemmode'} eq &mt('View') 
                   1141: 	&&  defined($env{'form.submitted'})
                   1142: 	&& !defined($env{'form.resetdata'})
                   1143: 	&& !defined($env{'form.newrandomization'})) {
                   1144: 	if ((!$env{'form.style_file'} && $env{'construct.style'})
                   1145: 	    ||$env{'form.clear_style_file'}) {
                   1146: 	    &Apache::lonnet::delenv('construct\\.style');
                   1147: 	} elsif ($env{'form.style_file'} 
                   1148: 	    && $env{'construct.style'} ne $env{'form.style_file'}) {
                   1149: 	    &Apache::lonnet::appenv('construct.style' => 
                   1150: 				        $env{'form.style_file'});
                   1151: 	}
                   1152:     }
                   1153: }
                   1154: 
                   1155: 
1.41      albertel 1156: sub handler {
1.145     albertel 1157:     #my $t0 = [&gettimeofday()];
                   1158:     my $request=$_[0];
1.223     albertel 1159:     $Apache::lonxml::request=$request;
1.204     albertel 1160:     $Apache::lonxml::debug=$env{'user.debug'};
                   1161:     $env{'request.uri'}=$request->uri;
1.180     albertel 1162:     &setuppermissions();
1.145     albertel 1163:     # some times multiple problemmodes are submitted, need to select
                   1164:     # the last one
1.204     albertel 1165:     if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
                   1166: 	my $mode=$env{'form.problemmode'}->[-1];
                   1167: 	undef $env{'form.problemmode'};
                   1168: 	$env{'form.problemmode'}=$mode;
1.145     albertel 1169:     }
1.193     albertel 1170: 
1.145     albertel 1171:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                   1172: 
                   1173:     #check if we know where we are
1.204     albertel 1174:     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
1.145     albertel 1175: 	# if we are browsing we might not be able to know where we are
1.173     albertel 1176: 	if ($Apache::lonhomework::browse ne 'F' && 
1.204     albertel 1177: 	    $env{'request.state'} ne "construct") {
1.145     albertel 1178: 	    #should know where we are, so ask
1.253     albertel 1179: 	    &unset_permissions();
                   1180: 	    $request->internal_redirect('/adm/ambiguous');
                   1181: 	    return OK;
1.145     albertel 1182: 	}
                   1183:     }
1.253     albertel 1184:     if (&setupheader($request)) {
                   1185: 	&unset_permissions();
                   1186: 	return OK;
                   1187:     }
1.244     albertel 1188:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1.204     albertel 1189:     &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.261     albertel 1190:     my ($symb) = &Apache::lonnet::whichuser();
1.145     albertel 1191:     &Apache::lonxml::debug('symb is '.$symb);
1.204     albertel 1192:     if ($env{'request.state'} eq "construct") {
1.145     albertel 1193: 	if ( -e $file ) {
                   1194: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1195: 						    ['problemmode']);
1.204     albertel 1196: 	    if (!(defined $env{'form.problemmode'})) {
1.145     albertel 1197: 		#first visit to problem in construction space
1.204     albertel 1198: 		$env{'form.problemmode'}='View';
1.145     albertel 1199: 		&renderpage($request,$file);
1.204     albertel 1200: 	    } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
                   1201: 		     $env{'form.problemmode'} eq 'EditXML') {
1.145     albertel 1202: 		&editxmlmode($request,$file);
1.204     albertel 1203: 	    } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel 1204: 		&analyze($request,$file);
                   1205: 	    } else {
1.268     albertel 1206: 		&update_construct_style();
1.145     albertel 1207: 		&renderpage($request,$file);
                   1208: 	    }
                   1209: 	} else {
                   1210: 	    # requested file doesn't exist in contruction space
                   1211: 	    &newproblem($request);
                   1212: 	}
                   1213:     } else {
                   1214: 	# just render the page normally outside of construction space
                   1215: 	&Apache::lonxml::debug("not construct");
1.52      albertel 1216: 	&renderpage($request,$file);
1.41      albertel 1217:     }
1.145     albertel 1218:     #my $td=&tv_interval($t0);
                   1219:     #&Apache::lonxml::debug("Spent $td seconds processing");
                   1220:     # always turn off debug messages
                   1221:     $Apache::lonxml::debug=0;
1.253     albertel 1222:     &unset_permissions();
1.145     albertel 1223:     return OK;
1.52      albertel 1224: 
1.1       albertel 1225: }
                   1226: 
                   1227: 1;
                   1228: __END__

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