Annotation of loncom/homework/lonhomework.pm, revision 1.207

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.207   ! albertel    4: # $Id: lonhomework.pm,v 1.206 2005/05/03 00:05:41 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);
1.73      albertel   52: use HTML::Entities();
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 );
1.188     foxr       56: use Apache::lonnet();
                     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: 
                     66: #
1.189     albertel   67: # Decides what targets to render for.
1.188     foxr       68: # Implicit inputs:
                     69: #   Various session environment variables:
1.189     albertel   70: #      request.state -  published  - is a /res/ resource
                     71: #                       uploaded   - is a /uploaded/ resource
                     72: #                       contruct   - is a /priv/ resource
                     73: #      form.grade_target - a form parameter requesting a specific target
1.5       albertel   74: sub get_target {
1.204     albertel   75:     &Apache::lonxml::debug("request.state = $env{'request.state'}");
                     76:     if( defined($env{'form.grade_target'})) {
                     77: 	&Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
1.188     foxr       78:     } else {
1.189     albertel   79: 	&Apache::lonxml::debug("form.grade_target <undefined>");
1.188     foxr       80:     }
1.204     albertel   81:     if (($env{'request.state'} eq "published") ||
                     82: 	($env{'request.state'} eq "uploaded")) {
                     83: 	if ( defined($env{'form.grade_target'}  ) 
                     84: 	     && ($env{'form.grade_target'} eq 'tex')) {
                     85: 	    return ($env{'form.grade_target'});
                     86: 	} elsif ( defined($env{'form.grade_target'}  ) 
1.145     albertel   87: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.207   ! albertel   88: 	    return ($env{'form.grade_target'});
        !            89: 	}
        !            90: 	if ($env{'form.webgrade'} &&
        !            91: 	    $Apache::lonhomework::modifygrades eq 'F') {
        !            92: 	    return ('grade','webgrade');
1.145     albertel   93: 	}
1.204     albertel   94: 	if ( defined($env{'form.submitted'}) &&
                     95: 	     ( !defined($env{'form.resetdata'})) &&
                     96: 	     ( !defined($env{'form.newrandomization'}))) {
1.145     albertel   97: 	    return ('grade', 'web');
                     98: 	} else {
                     99: 	    return ('web');
                    100: 	}
1.204     albertel  101:     } elsif ($env{'request.state'} eq "construct") {
                    102: 	if ( defined($env{'form.grade_target'}) ) {
                    103: 	    return ($env{'form.grade_target'});
1.145     albertel  104: 	}
1.204     albertel  105: 	if ( defined($env{'form.preview'})) {
                    106: 	    if ( defined($env{'form.submitted'})) {
1.145     albertel  107: 		return ('grade', 'web');
                    108: 	    } else {
                    109: 		return ('web');
                    110: 	    }
                    111: 	} else {
1.204     albertel  112: 	    if ( $env{'form.problemmode'} eq &mt('View') ||
                    113: 		 $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
                    114: 		if ( defined($env{'form.submitted'}) &&
                    115: 		     (!defined($env{'form.resetdata'})) &&
                    116: 		     (!defined($env{'form.newrandomization'}))) {
1.145     albertel  117: 		    return ('grade', 'web','answer');
                    118: 		} else {
                    119: 		    return ('web','answer');
                    120: 		}
1.204     albertel  121: 	    } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
                    122: 		      $env{'form.problemmode'} eq 'Edit') {
                    123: 		if ( $env{'form.submitted'} eq 'edit' ) {
                    124: 		    if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  125: 			return ('modified','web','answer');
                    126: 		    } else {
                    127: 			return ('modified','edit');
                    128: 		    }
                    129: 		} else {
                    130: 		    return ('edit');
                    131: 		}
                    132: 	    } else {
                    133: 		return ('web');
                    134: 	    }
                    135: 	}
1.15      albertel  136:     }
1.145     albertel  137:     return ();
1.5       albertel  138: }
                    139: 
1.3       albertel  140: sub setup_vars {
1.145     albertel  141:     my ($target) = @_;
                    142:     return ';'
1.11      albertel  143: #  return ';$external::target='.$target.';';
1.2       albertel  144: }
                    145: 
                    146: sub send_header {
1.145     albertel  147:     my ($request)= @_;
                    148:     $request->print(&Apache::lontexconvert::header());
1.204     albertel  149: #  $request->print('<form name='.$env{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  150: }
                    151: 
1.36      albertel  152: sub createmenu {
1.145     albertel  153:     my ($which,$request)=@_;
                    154:     if ($which eq 'grade') {
                    155: 	$request->print('<script language="JavaScript"> 
1.91      albertel  156:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  157:                  "height=350,width=150,menubar=no");
                    158:           </script>');
1.145     albertel  159:     }
1.36      albertel  160: }
                    161: 
1.2       albertel  162: sub send_footer {
1.145     albertel  163:     my ($request)= @_;
1.16      albertel  164: #  $request->print('</form>');
1.145     albertel  165:     $request->print(&Apache::lontexconvert::footer());
1.2       albertel  166: }
                    167: 
1.200     albertel  168: sub proctor_checked_in {
1.207   ! albertel  169:     my ($slot_name,$slot)=@_;
1.202     albertel  170:     my @allowed=split(",",$slot->{'proctor'});
                    171:     foreach my $possible (@allowed) { 
1.207   ! albertel  172: 	if ($Apache::lonhomework::history{'resource.checkedin'} eq $possible &&
        !           173: 	    $Apache::lonhomework::history{'resource.checkedin.slot'} eq 
        !           174: 	        $slot_name ) {
1.202     albertel  175: 	    return 1;
                    176: 	}
                    177:     }
1.200     albertel  178:     return 0;
                    179: }
                    180: 
1.52      albertel  181: $Apache::lonxml::browse='';
1.152     albertel  182: sub check_ip_acc {
                    183:     my ($acc)=@_;
1.154     albertel  184:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  185:     my $allowed=0;
                    186:     my $ip=$ENV{'REMOTE_ADDR'};
                    187:     my $name;
                    188:     foreach my $pattern (split(',',$acc)) {
                    189: 	if ($pattern =~ /\*$/) {
                    190: 	    #35.8.*
                    191: 	    $pattern=~s/\*//;
                    192: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    193: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    194: 	    #35.8.3.[34-56]
                    195: 	    my $low=$2;
                    196: 	    my $high=$3;
                    197: 	    $pattern=$1;
                    198: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    199: 		my $last=(split(/\./,$ip))[3];
                    200: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    201: 	    }
                    202: 	} elsif ($pattern =~ /^\*/) {
                    203: 	    #*.msu.edu
                    204: 	    $pattern=~s/\*//;
                    205: 	    if (!defined($name)) {
                    206: 		use Socket;
                    207: 		my $netaddr=inet_aton($ip);
                    208: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  209: 	    }
1.152     albertel  210: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    211: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    212: 	    #127.0.0.1
                    213: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    214: 	} else {
                    215: 	    #some.name.com
                    216: 	    if (!defined($name)) {
                    217: 		use Socket;
                    218: 		my $netaddr=inet_aton($ip);
                    219: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    220: 	    }
                    221: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    222: 	}
                    223: 	if ($allowed) { last; }
                    224:     }
                    225:     return $allowed;
                    226: }
1.198     albertel  227: 
                    228: sub check_task_access {
1.207   ! albertel  229:     # does it pass normal muster
        !           230:     # yes we really do want the default args passing
1.200     albertel  231:     my ($status,$datemsg)=&check_access;
                    232:     if ($status eq 'SHOW_ANSWER' ||
                    233: 	$status eq 'CLOSED' ||
                    234: 	$status eq 'CANNOT_ANSWER' ||
                    235: 	$status eq 'INVALID_ACCESS' ||
                    236: 	$status eq 'UNAVAILABLE') {
                    237: 	return ($status,$datemsg);
                    238:     }
1.204     albertel  239:     if ($env{'request.state'} eq "construct") {
1.203     albertel  240: 	return ($status,$datemsg);
                    241:     }
1.200     albertel  242:     
1.207   ! albertel  243:     if ($Apache::lonhomework::history{'resource.checkedin'}) {
        !           244: 	if ($Apache::lonhomework::history{'resource.status'} eq 'pass' ||
        !           245: 	    $Apache::lonhomework::history{'resource.status'} eq 'fail') {
        !           246: 	    return ('SHOW_ANSWER');
        !           247: 	}
        !           248:     }
1.200     albertel  249:     my ($id)=@_;
                    250:     my @slots=split(':',&Apache::lonnet::EXT("resource.$id.available"));
                    251: #    if (!@slots) {
                    252: #	return ($status,$datemsg);
                    253: #    }
                    254:     my $slotstatus='NOT_IN_A_SLOT';
1.206     albertel  255:     my ($returned_slot,$slot_name);
1.207   ! albertel  256:     foreach my $slot (sort(@slots)) {
1.201     albertel  257: 	&Apache::lonxml::debug("getting $slot");
1.200     albertel  258: 	my %slot=&Apache::lonnet::get_slot($slot);
1.201     albertel  259: 	&Apache::lonhomework::showhash(%slot);
1.200     albertel  260: 	if ($slot{'starttime'} < time &&
                    261: 	    $slot{'endtime'} > time &&
1.201     albertel  262: 	    &check_ip_acc($slot{'ip'})) {
1.202     albertel  263: 	    &Apache::lonxml::debug("$slot is good");
                    264: 	    $slotstatus='NEEDS_CHECKIN';
                    265: 	    $returned_slot=\%slot;
1.206     albertel  266: 	    $slot_name=$slot;
1.200     albertel  267: 	    last;
                    268: 	}
                    269:     }
1.202     albertel  270:     if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.207   ! albertel  271: 	&proctor_checked_in($slot_name,$returned_slot)) {
1.202     albertel  272: 	&Apache::lonxml::debug("protoctor checked in");
1.200     albertel  273: 	$slotstatus='CAN_ANSWER';
                    274:     }
1.207   ! albertel  275:     if ( ($slotstatus eq 'NOT_IN_A_SLOT' || $slotstatus eq 'NEEDS_CHECKIN') && 
        !           276: 	$Apache::lonhomework::history{'resource.checkedin'}) {
        !           277: 	return ('WAITING_FOR_GRADE');
        !           278:     }
1.206     albertel  279:     return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198     albertel  280: }
1.200     albertel  281: 
1.92      bowersj2  282: # JB, 9/24/2002: Any changes in this function may require a change
                    283: # in lonnavmaps::resource::getDateStatus.
1.53      www       284: sub check_access {
1.145     albertel  285:     my ($id) = @_;
                    286:     my $date ='';
                    287:     my $status;
                    288:     my $datemsg = '';
                    289:     my $lastdate = '';
                    290:     my $temp;
                    291:     my $type;
                    292:     my $passed;
                    293: 
1.204     albertel  294:     if ($env{'request.state'} eq "construct") {
                    295: 	if ($env{'form.problemstate'}) {
                    296: 	    if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
                    297: 		if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
1.167     albertel  298: 			lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168     albertel  299: 		    return ('CANNOT_ANSWER',
1.174     www       300: 			    &mt('is in this state due to author settings.'));
1.167     albertel  301: 		}
1.165     albertel  302: 	    } else {
1.204     albertel  303: 		return ($env{'form.problemstate'},
1.174     www       304: 			&mt('is in this state due to author settings.'));
1.165     albertel  305: 	    }
                    306: 	}
1.145     albertel  307: 	&Apache::lonxml::debug("in construction ignoring dates");
                    308: 	$status='CAN_ANSWER';
1.146     albertel  309: 	$datemsg=&mt('is in under construction');
1.163     albertel  310: #	return ($status,$datemsg);
1.145     albertel  311:     }
                    312: 
                    313:     &Apache::lonxml::debug("checking for part :$id:");
                    314:     &Apache::lonxml::debug("time:".time);
1.152     albertel  315: 
1.204     albertel  316:     if ($env{'request.state'} ne "construct") {
1.163     albertel  317: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    318: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    319: 	    $status='INVALID_ACCESS';
                    320: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  321: 	    return($status,$date);
                    322: 	}
1.163     albertel  323: 	
                    324: 	foreach $temp ("opendate","duedate","answerdate") {
                    325: 	    $lastdate = $date;
                    326: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    327: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    328: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    329: 		$date     =~ /^(con_lost|no_such_host)/) {
                    330: 		$status='UNAVAILABLE';
                    331: 		$date=&mt("may open later.");
                    332: 		return($status,$date);
                    333: 	    }
                    334: 	    if ($thistype eq 'date_interval') {
                    335: 		if ($temp eq 'opendate') {
                    336: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    337: 		}
                    338: 		if ($temp eq 'answerdate') {
                    339: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    340: 		}
1.145     albertel  341: 	    }
1.163     albertel  342: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    343: 	    if ($date eq '') {
                    344: 		$date = &mt("an unknown date"); $passed = 0;
                    345: 	    } elsif ($date eq 'con_lost') {
                    346: 		$date = &mt("an indeterminate date"); $passed = 0;
                    347: 	    } else {
                    348: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    349: 		$date = localtime $date;
1.145     albertel  350: 	    }
1.163     albertel  351: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  352: 	}
1.163     albertel  353: 	&Apache::lonxml::debug("have :$type:$passed:");
                    354: 	if ($passed) {
                    355: 	    $status='SHOW_ANSWER';
                    356: 	    $datemsg=$date;
                    357: 	} elsif ($type eq 'opendate') {
                    358: 	    $status='CLOSED';
                    359: 	    $datemsg = &mt("will open on")." $date";
                    360: 	} elsif ($type eq 'duedate') {
                    361: 	    $status='CAN_ANSWER';
                    362: 	    $datemsg = &mt("is due at")." $date";
                    363: 	} elsif ($type eq 'answerdate') {
                    364: 	    $status='CLOSED';
                    365: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  366: 	}
                    367:     }
                    368:     if ($status eq 'CAN_ANSWER') {
                    369: 	#check #tries, and if correct.
                    370: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    371: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    372: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  373: 	if ( $maxtries eq '' && 
1.204     albertel  374: 	     $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
1.164     albertel  375: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  376: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    377: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    378: 	    &&
                    379: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    380: 	   ||
                    381: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    382: 	    $status = 'CANNOT_ANSWER';
                    383: 	}
1.121     albertel  384:     }
1.181     albertel  385:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177     albertel  386: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
                    387: 	&Apache::lonxml::debug("looking for interval $interval");
                    388: 	if ($interval) {
                    389: 	    my $first_access=&Apache::lonnet::get_first_access('map');
                    390: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    391: 	    if (!$first_access) {
                    392: 		$status='NOT_YET_VIEWED';
1.192     albertel  393: 		$datemsg=&seconds_to_human_length($interval);
1.177     albertel  394: 	    } else {
                    395: 		my $newdate=localtime($first_access+$interval);
                    396: 		if (time > ($first_access+$interval)) {
                    397: 		    $status='CLOSED';
                    398: 		    $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
                    399: 		} else {
                    400: 		    $datemsg = &mt("is due at")." $newdate";
                    401: 		}
                    402: 	    }
                    403: 	}
                    404:     }
1.133     albertel  405:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    406:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    407:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    408:   #}
1.54      www       409: 
                    410: 
1.145     albertel  411:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    412:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    413: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    414: 	$status='CAN_ANSWER';
1.146     albertel  415: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  416:     }
1.106     albertel  417: 
1.145     albertel  418:     return ($status,$datemsg);
1.20      albertel  419: }
                    420: 
1.192     albertel  421: sub seconds_to_human_length {
                    422:     my ($length)=@_;
                    423: 
                    424:     my $seconds=$length%60; $length=int($length/60);
                    425:     my $minutes=$length%60; $length=int($length/60);
                    426:     my $hours=$length%24;   $length=int($length/24);
                    427:     my $days=$length;
                    428: 
                    429:     my $timestr;
                    430:     if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
                    431:     if ($hours > 0) { $timestr.=($timestr?", ":"").
                    432: 			  &mt('[quant,_1,hour]',$hours); }
                    433:     if ($minutes > 0) { $timestr.=($timestr?", ":"").
                    434: 			    &mt('[quant,_1,minute]',$minutes); }
                    435:     if ($seconds > 0) { $timestr.=($timestr?", ":"").
                    436: 			    &mt('[quant,_1,second]',$seconds); }
                    437:     return $timestr;
                    438: }
                    439: 
1.41      albertel  440: sub showhash {
1.145     albertel  441:     my (%hash) = @_;
                    442:     &showhashsubset(\%hash,'.');
                    443:     return '';
1.79      albertel  444: }
                    445: 
1.106     albertel  446: sub showarray {
                    447:     my ($array)=@_;
                    448:     my $string="(";
                    449:     foreach my $elm (@{ $array }) {
1.193     albertel  450: 	if (ref($elm) eq 'ARRAY') {
                    451: 	    $string.=&showarray($elm);
                    452: 	} elsif (ref($elm) eq 'HASH') {
                    453: 	    $string.= "HASH --- \n<br />";
                    454: 	    $string.= &showhashsubset($elm,'.');
1.106     albertel  455: 	} else {
                    456: 	    $string.="$elm,"
                    457: 	}
                    458:     }
                    459:     chop($string);
                    460:     $string.=")";
                    461:     return $string;
                    462: }
                    463: 
1.79      albertel  464: sub showhashsubset {
1.145     albertel  465:     my ($hash,$keyre) = @_;
                    466:     my $resultkey;
                    467:     foreach $resultkey (sort keys %$hash) {
1.193     albertel  468: 	if ($resultkey !~ /$keyre/) { next; }
                    469: 	if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
                    470: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    471: 				   &showarray($$hash{$resultkey}));
                    472: 	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
                    473: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    474: 	    &showhashsubset($$hash{$resultkey},'.');
                    475: 	} else {
                    476: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145     albertel  477: 	}
                    478:     }
                    479:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    480:     return '';
1.41      albertel  481: }
                    482: 
                    483: sub setuppermissions {
1.204     albertel  484:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
                    485:     my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145     albertel  486:     if (! $viewgrades && 
1.204     albertel  487: 	exists($env{'request.course.sec'}) && 
                    488: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    489: 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                    490:                                                '/'.$env{'request.course.sec'});
1.145     albertel  491:     }
1.188     foxr      492:     $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
1.185     albertel  493:     if ($Apache::lonhomework::browse eq 'F' && 
1.204     albertel  494: 	$env{'form.devalidatecourseresdata'} eq 'on') {
1.185     albertel  495: 	my (undef,$courseid) = &Apache::lonxml::whichuser();
1.204     albertel  496: 	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
                    497: 					      $env{"course.$courseid.domain"});
1.185     albertel  498:     }
1.205     albertel  499:     my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
                    500:     if (! $modifygrades && 
                    501: 	exists($env{'request.course.sec'}) && 
                    502: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    503: 	$modifygrades = 
                    504: 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
                    505: 				     '/'.$env{'request.course.sec'});
                    506:     }
                    507:     $Apache::lonhomework::modifygrades = $modifygrades;
                    508:     return '';
1.41      albertel  509: }
                    510: 
                    511: sub setupheader {
1.120     albertel  512:     my $request=$_[0];
1.197     albertel  513:     &Apache::loncommon::content_type($request,'text/html');
1.120     albertel  514:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    515: 	&Apache::loncommon::no_cache($request);
                    516:     }
1.196     albertel  517: #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                    518: #							  'lastrevisiondate'));
1.120     albertel  519:     $request->send_http_header;
                    520:     return OK if $request->header_only;
                    521:     return ''
1.41      albertel  522: }
1.35      albertel  523: 
1.47      albertel  524: sub handle_save_or_undo {
1.145     albertel  525:     my ($request,$problem,$result) = @_;
                    526:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    527:     my $filebak =$file.".bak";
                    528:     my $filetmp =$file.".tmp";
                    529:     my $error=0;
1.156     albertel  530: 
                    531:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  532: 
1.204     albertel  533:     if ($env{'form.Undo'} eq &mt('undo')) {
1.145     albertel  534: 	my $error=0;
                    535: 	if (!copy($file,$filetmp)) { $error=1; }
                    536: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    537: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    538: 	if (!$error) {
1.171     albertel  539: 	    &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  540: 	} else {
1.171     albertel  541: 	    &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
1.145     albertel  542: 	    $error=1;
                    543: 	}
1.52      albertel  544:     } else {
1.145     albertel  545: 	my $fs=Apache::File->new(">$filebak");
                    546: 	if (defined($fs)) {
                    547: 	    print $fs $$problem;
1.171     albertel  548: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to").
                    549: 				  " $filebak</b>");
1.145     albertel  550: 	} else {
1.171     albertel  551: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  552: 	    $error=2;
                    553: 	}
                    554: 	my $fh=Apache::File->new(">$file");
                    555: 	if (defined($fh)) {
                    556: 	    print $fh $$result;
1.171     albertel  557: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
                    558: 				  " $file</b>");
1.145     albertel  559: 	} else {
1.171     albertel  560: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
                    561: 				  &mt("Unable to write to")." $file</b></font>");
1.145     albertel  562: 	    $error|=4;
                    563: 	}
1.52      albertel  564:     }
1.145     albertel  565:     return $error;
1.64      albertel  566: }
                    567: 
1.101     albertel  568: sub analyze_header {
                    569:     my ($request) = @_;
1.183     albertel  570:     my $bodytag='<body bgcolor="#ffffff">';
1.204     albertel  571:     if ($env{'environment.remote'} eq 'off') {
1.183     albertel  572: 	$bodytag=&Apache::loncommon::bodytag();
                    573:     }
1.197     albertel  574:     my $html=&Apache::lonxml::xmlbegin();
                    575:     my $result.=$html.'
1.146     albertel  576:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.183     albertel  577:             '.$bodytag.&Apache::lonxml::message_location().'
1.101     albertel  578:             <form name="lonhomework" method="POST" action="'.
1.204     albertel  579: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  580: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  581:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    582:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  583:             <hr />
1.146     albertel  584:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  585:             <hr />
                    586:             </form>';
1.171     albertel  587:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  588:     $request->print($result);
                    589:     $request->rflush();
                    590: }
                    591: 
1.109     albertel  592: sub analyze_footer {
                    593:     my ($request) = @_;
                    594:     my $result='</body></html>';
                    595:     $request->print($result);
                    596:     $request->rflush();
                    597: }
                    598: 
1.74      albertel  599: sub analyze {
1.101     albertel  600:     my ($request,$file) = @_;
                    601:     &Apache::lonxml::debug("Analyze");
                    602:     my $result;
                    603:     my %overall;
                    604:     my %allparts;
1.204     albertel  605:     my $rndseed=$env{'form.rndseed'};
1.101     albertel  606:     &analyze_header($request);
1.114     albertel  607:     my %prog_state=
1.146     albertel  608: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    609: 					      &mt('Getting Problem Variants'),
1.204     albertel  610: 					      $env{'form.numtoanalyze'},
1.175     albertel  611: 					      'inline',undef);
1.204     albertel  612:     for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  613: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  614: 						 &mt('last problem'));
1.182     albertel  615: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.101     albertel  616: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    617: 					   ('grade_target' => 'analyze'),
1.130     albertel  618: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  619: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    620: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  621: 	my @parts;
                    622: 	if (defined(@{ $analyze{'parts'} })) {
                    623: 	    @parts=@{ $analyze{'parts'} };
                    624: 	}
1.101     albertel  625: 	foreach my $part (@parts) {
                    626: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  627: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    628: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    629: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  630: 		push( @{ $overall{$part.'.answer'} },
                    631: 		      [@{ $analyze{$part.'.answer'} }]);
                    632: 	    }
                    633: 	}
                    634:     }
1.114     albertel  635:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  636: 					  &mt('Analyzing Results'));
1.175     albertel  637:     $request->print('<hr />'.&mt('List of possible answers').': ');
1.134     albertel  638:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  639: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  640: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.184     albertel  641: 	    $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
1.130     albertel  642: 	    my %frequency;
1.109     albertel  643: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  644: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  645: 	    }
1.184     albertel  646: 	    $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
1.132     albertel  647: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    648: 		$request->print('<tr><td align="right">'.
                    649: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  650: 				'</td><td>('.$frequency{$answer}.
                    651: 				')</td></tr>');
1.109     albertel  652: 	    }
                    653: 	    $request->print('</table>');
                    654: 	} else {
1.162     albertel  655: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  656: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  657: 	}
                    658:     }
1.130     albertel  659:     if (scalar(keys(%allparts)) == 0 ) {
1.162     albertel  660: 	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  661:     }
1.114     albertel  662:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  663:     &analyze_footer($request);
1.101     albertel  664:     &Apache::lonhomework::showhash(%overall);
                    665:     return $result;
1.74      albertel  666: }
                    667: 
1.64      albertel  668: sub editxmlmode {
1.145     albertel  669:     my ($request,$file) = @_;
                    670:     my $result;
                    671:     my $problem=&Apache::lonnet::getfile($file);
                    672:     if ($problem eq -1) {
1.146     albertel  673: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    674: 			       " <i>$file</i></b>");
1.145     albertel  675: 	$problem='';
                    676:     }
1.204     albertel  677:     if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
1.145     albertel  678: 	my $error=&handle_save_or_undo($request,\$problem,
1.204     albertel  679: 				       \$env{'form.editxmltext'});
1.145     albertel  680: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    681:     }
1.204     albertel  682:     &Apache::lonhomework::showhashsubset(\%env,'^form');
                    683:     if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
                    684: 	&Apache::lonhomework::showhashsubset(\%env,'^form');
                    685: 	$env{'form.problemmode'}='View';
1.145     albertel  686: 	&renderpage($request,$file);
                    687:     } else {
                    688: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       689: 	my $xml_help = '<table><tr><td>'.
                    690: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    691: 						    "Problem Editing Help").
                    692: 						    '</td><td>'.
1.178     albertel  693:        &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
                    694:                 '</td></tr></table>';
1.145     albertel  695: 	if ($cols > 80) { $cols = 80; }
                    696: 	if ($cols < 70) { $cols = 70; }
                    697: 	if ($rows < 20) { $rows = 20; }
1.183     albertel  698: 	my $bodytag='<body bgcolor="#ffffff">';
1.204     albertel  699: 	if ($env{'environment.remote'} eq 'off') {
1.183     albertel  700: 	    $bodytag=&Apache::loncommon::bodytag();
                    701: 	}
1.197     albertel  702: 	my $html=&Apache::lonxml::xmlbegin();
                    703: 	$result.=$html.$bodytag.&Apache::lonxml::message_location().'
1.64      albertel  704:             <form name="lonhomework" method="POST" action="'.
1.204     albertel  705: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  706: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  707:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170     matthew   708:             <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    709:             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.64      albertel  710:             <hr />
1.170     matthew   711:             <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                    712:             <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
                    713:             <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64      albertel  714:             <hr />
1.110     albertel  715:             ' . $xml_help . '
1.199     albertel  716:             <textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.172     albertel  717: 	    &HTML::Entities::encode($problem,'<>&"').'</textarea>
1.64      albertel  718:             </form></body></html>';
1.171     albertel  719: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  720: 	$request->print($result);
                    721:     }
                    722:     return '';
1.47      albertel  723: }
1.189     albertel  724: 
1.188     foxr      725: #
                    726: #    Render the page in whatever target desired.
                    727: #
1.41      albertel  728: sub renderpage {
1.145     albertel  729:     my ($request,$file) = @_;
1.52      albertel  730: 
1.145     albertel  731:     my (@targets) = &get_target();
1.204     albertel  732:     &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145     albertel  733:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171     albertel  734:     my $overall_result;
1.145     albertel  735:     foreach my $target (@targets) {
1.183     albertel  736: 	# FIXME need to do something intelligent when a problem goes
                    737:         # from viewable to not viewable due to map conditions
                    738: 	#&setuppermissions();
                    739: 	#if (   $Apache::lonhomework::browse ne '2'
                    740: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                    741: 	#    $request->print(" You most likely shouldn't see me.");
                    742: 	#}
1.145     albertel  743: 	#my $t0 = [&gettimeofday()];
                    744: 	my $problem=&Apache::lonnet::getfile($file);
                    745: 	if ($problem eq -1) {
1.146     albertel  746: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  747: 	    $problem='';
                    748: 	}
1.52      albertel  749: 
1.145     albertel  750: 	my %mystyle;
                    751: 	my $result = '';
                    752: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    753: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204     albertel  754: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145     albertel  755: 
                    756: 	&Apache::lonxml::debug("Should be parsing now");
                    757: 	$result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    758: 					    &setup_vars($target),%mystyle);
                    759: 	undef($Apache::lonhomework::parsing_a_problem);
                    760: 	#$request->print("Result follows:");
                    761: 	if ($target eq 'modified') {
                    762: 	    &handle_save_or_undo($request,\$problem,\$result);
                    763: 	} else {
                    764: 	    if ($target eq 'analyze') {
                    765: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    766: 		undef(%Apache::lonhomework::analyze);
                    767: 	    }
                    768: 	    #my $td=&tv_interval($t0);
                    769: 	    #if ( $Apache::lonxml::debug) {
                    770: 	    #$result =~ s:</body>::;
                    771: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    772: 	    #}
1.171     albertel  773: #	    $request->print($result);
                    774: 	    $overall_result.=$result;
                    775: #	    $request->rflush();
1.145     albertel  776: 	}
                    777: 	#$request->print(":Result ends");
                    778: 	#my $td=&tv_interval($t0);
1.52      albertel  779:     }
1.171     albertel  780:     &Apache::lonxml::add_messages(\$overall_result);
                    781:     $request->print($overall_result);   
                    782:     $request->rflush();   
1.41      albertel  783: }
                    784: 
1.42      albertel  785: # with no arg it returns a HTML <option> list of the template titles
                    786: # with one arg it returns the filename associated with the arg passed
                    787: sub get_template_list {
1.145     albertel  788:     my ($namewanted,$extension) = @_;
                    789:     my $result;
                    790:     my @allnames;
                    791:     &Apache::lonxml::debug("Looking for :$extension:");
                    792:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    793: 	my $name=&Apache::lonnet::metadata($file,'title');
                    794: 	if ($namewanted && ($name eq $namewanted)) {
                    795: 	    $result=$file;
                    796: 	    last;
                    797: 	} else {
                    798: 	    if ($name) { push (@allnames, $name); }
                    799: 	}
                    800:     }
                    801:     if (@allnames && !$result) {
1.146     albertel  802: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  803: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  804:     }
1.145     albertel  805:     return $result;
1.42      albertel  806: }
                    807: 
                    808: sub newproblem {
1.65      matthew   809:     my ($request) = @_;
                    810:     my $extension=$request->uri;
                    811:     $extension=~s:^.*\.([\w]+)$:$1:;
                    812:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  813:     my $templatelist=&get_template_list('',$extension);
1.204     albertel  814:     if ($env{'form.template'} &&
                    815: 	$env{'form.template'} ne "Select a $extension template") {
1.65      matthew   816: 	use File::Copy;
1.204     albertel  817: 	my $file = &get_template_list($env{'form.template'},$extension);
1.65      matthew   818: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    819: 	copy($file,$dest);
                    820: 	&renderpage($request,$dest);
1.204     albertel  821:     } elsif($env{'form.newfile'} && !$templatelist) {
1.131     albertel  822: 	# I don't like hard-coded filenames but for now, this will work.
                    823: 	use File::Copy;
                    824: 	my $templatefilename =
                    825: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    826: 	&Apache::lonxml::debug("$templatefilename");
                    827: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    828: 	copy($templatefilename,$dest);
                    829: 	&renderpage($request,$dest);
1.85      albertel  830:     } else {
1.176     albertel  831: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                    832: 	my $shownurl=$url;	
1.157     albertel  833: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   834: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  835: 	my $errormsg;
1.204     albertel  836: 	if ($env{'form.newfile'}) {
1.146     albertel  837: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  838: 	}
1.85      albertel  839: 	my $instructions;
1.186     albertel  840: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
1.204     albertel  841: 					($env{'environment.remote'} ne 'off'));
1.146     albertel  842: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  843: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  844: 			  'resource' => 'resource',
                    845: 			  'requested' => 'The requested file',
                    846: 			  'not exist' => 'currently does not exist',
                    847: 			  'createnew' => 'To create a new',
                    848: 			  'click' => 'click on the',
                    849: 			  'Create' => 'Create',
                    850: 			  'button' => 'button');
1.65      matthew   851: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       852: $bodytag
1.148     albertel  853: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  854: $errormsg
1.157     albertel  855: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       856: <p>
1.146     albertel  857: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       858: </p>
                    859: <p><form action="$url" method="POST">
1.42      albertel  860: ENDNEWPROBLEM
1.85      albertel  861: 	if (defined($templatelist)) {
                    862: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    863: 	}
1.146     albertel  864: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       865: 	$request->print("</form></p></body>");
1.65      matthew   866:     }
                    867:     return '';
1.42      albertel  868: }
                    869: 
                    870: sub view_or_edit_menu {
1.145     albertel  871:     my ($request) = @_;
1.176     albertel  872:     my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.147     albertel  873:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  874: 		      'view' => 'View',
                    875: 		      'Edit' => 'edit',
                    876: 		      'or' => 'or',
                    877: 		      'the problem' => 'the problem');
1.145     albertel  878:     $request->print(<<EDITMENU);
1.42      albertel  879: <body bgcolor="#FFFFFF">
                    880: <form action="$url" method="POST">
1.170     matthew   881: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
                    882: &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
1.146     albertel  883: &lt{'the problem'}.
1.42      albertel  884: </form>
                    885: </body>
                    886: EDITMENU
                    887: }
                    888: 
1.41      albertel  889: sub handler {
1.145     albertel  890:     #my $t0 = [&gettimeofday()];
                    891:     my $request=$_[0];
                    892:     
1.204     albertel  893:     $Apache::lonxml::debug=$env{'user.debug'};
                    894:     $env{'request.uri'}=$request->uri;
1.180     albertel  895:     &setuppermissions();
1.145     albertel  896:     # some times multiple problemmodes are submitted, need to select
                    897:     # the last one
1.204     albertel  898:     if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
                    899: 	my $mode=$env{'form.problemmode'}->[-1];
                    900: 	undef $env{'form.problemmode'};
                    901: 	$env{'form.problemmode'}=$mode;
1.145     albertel  902:     }
1.193     albertel  903: 
1.145     albertel  904:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    905: 
                    906:     #check if we know where we are
1.204     albertel  907:     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
1.145     albertel  908: 	# if we are browsing we might not be able to know where we are
1.173     albertel  909: 	if ($Apache::lonhomework::browse ne 'F' && 
1.204     albertel  910: 	    $env{'request.state'} ne "construct") {
1.145     albertel  911: 	    #should know where we are, so ask
                    912: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    913: 		&Apache::lonnet::cleanenv();
                    914: 	    }
1.190     albertel  915: 	    &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
                    916: 	    $request->internal_redirect('/adm/ambiguous'); return OK;
1.145     albertel  917: 	}
                    918:     }
1.187     albertel  919:     if (&setupheader($request)) { return OK; }
1.193     albertel  920:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.204     albertel  921:     &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.145     albertel  922:     my ($symb) = &Apache::lonxml::whichuser();
                    923:     &Apache::lonxml::debug('symb is '.$symb);
1.204     albertel  924:     if ($env{'request.state'} eq "construct" || $symb eq '') {
                    925: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    926: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    927: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  928: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    929: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    930: 	    &Apache::lonxml::debug("Attempt reset");
                    931: 	}
                    932:     }
1.204     albertel  933:     if ($env{'request.state'} eq "construct") {
1.145     albertel  934: 	if ( -e $file ) {
                    935: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    936: 						    ['problemmode']);
1.204     albertel  937: 	    if (!(defined $env{'form.problemmode'})) {
1.145     albertel  938: 		#first visit to problem in construction space
                    939: 		#&view_or_edit_menu($request);
1.204     albertel  940: 		$env{'form.problemmode'}='View';
1.145     albertel  941: 		&renderpage($request,$file);
1.204     albertel  942: 	    } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
                    943: 		     $env{'form.problemmode'} eq 'EditXML') {
1.145     albertel  944: 		&editxmlmode($request,$file);
1.204     albertel  945: 	    } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  946: 		&analyze($request,$file);
                    947: 	    } else {
                    948: 		&renderpage($request,$file);
                    949: 	    }
                    950: 	} else {
                    951: 	    # requested file doesn't exist in contruction space
                    952: 	    &newproblem($request);
                    953: 	}
                    954:     } else {
                    955: 	# just render the page normally outside of construction space
                    956: 	&Apache::lonxml::debug("not construct");
1.52      albertel  957: 	&renderpage($request,$file);
1.41      albertel  958:     }
1.145     albertel  959:     #my $td=&tv_interval($t0);
                    960:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    961:     # &Apache::lonhomework::send_footer($request);
                    962:     # always turn off debug messages
                    963:     $Apache::lonxml::debug=0;
                    964:     return OK;
1.52      albertel  965: 
1.1       albertel  966: }
                    967: 
                    968: 1;
                    969: __END__

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