Annotation of loncom/homework/lonhomework.pm, revision 1.217

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.216     albertel    4: # $Id: lonhomework.pm,v 1.215 2005/07/29 23:51:06 raeburn Exp $
1.63      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
1.159     www        27: 
1.1       albertel   28: 
                     29: package Apache::lonhomework;
                     30: use strict;
1.73      albertel   31: use Apache::style();
                     32: use Apache::lonxml();
1.204     albertel   33: use Apache::lonnet;
1.73      albertel   34: use Apache::lonplot();
                     35: use Apache::inputtags();
                     36: use Apache::structuretags();
                     37: use Apache::randomlabel();
                     38: use Apache::response();
                     39: use Apache::hint();
                     40: use Apache::outputtags();
1.83      albertel   41: use Apache::caparesponse();
                     42: use Apache::radiobuttonresponse();
                     43: use Apache::optionresponse();
                     44: use Apache::imageresponse();
                     45: use Apache::essayresponse();
                     46: use Apache::externalresponse();
1.106     albertel   47: use Apache::rankresponse();
1.107     albertel   48: use Apache::matchresponse();
1.137     albertel   49: use Apache::chemresponse();
1.169     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'}))) {
1.217   ! albertel   97: 	    return ('grade', 'web');
1.145     albertel   98: 	} else {
1.217   ! albertel   99: 	    return ('web');
1.145     albertel  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 ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  125: 			return ('modified','web','answer');
                    126: 		    } else {
1.211     albertel  127: 			return ('modified','no_output_web','edit');
1.145     albertel  128: 		    }
                    129: 		} else {
1.211     albertel  130: 		    return ('no_output_web','edit');
1.145     albertel  131: 		}
                    132: 	    } else {
                    133: 		return ('web');
                    134: 	    }
                    135: 	}
1.15      albertel  136:     }
1.145     albertel  137:     return ();
1.5       albertel  138: }
                    139: 
1.3       albertel  140: sub setup_vars {
1.145     albertel  141:     my ($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'});
1.208     albertel  171:     my $version=$Apache::lonhomework::history{'resource.version'};
1.202     albertel  172:     foreach my $possible (@allowed) { 
1.208     albertel  173: 	if ($Apache::lonhomework::history{"resource.$version.checkedin"} eq
                    174: 	    $possible &&
                    175: 	    $Apache::lonhomework::history{"resource.$version.checkedin.slot"}
                    176: 	       eq $slot_name) {
1.202     albertel  177: 	    return 1;
                    178: 	}
                    179:     }
1.200     albertel  180:     return 0;
                    181: }
                    182: 
1.52      albertel  183: $Apache::lonxml::browse='';
1.152     albertel  184: sub check_ip_acc {
                    185:     my ($acc)=@_;
1.154     albertel  186:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  187:     my $allowed=0;
                    188:     my $ip=$ENV{'REMOTE_ADDR'};
                    189:     my $name;
                    190:     foreach my $pattern (split(',',$acc)) {
                    191: 	if ($pattern =~ /\*$/) {
                    192: 	    #35.8.*
                    193: 	    $pattern=~s/\*//;
                    194: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    195: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    196: 	    #35.8.3.[34-56]
                    197: 	    my $low=$2;
                    198: 	    my $high=$3;
                    199: 	    $pattern=$1;
                    200: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    201: 		my $last=(split(/\./,$ip))[3];
                    202: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    203: 	    }
                    204: 	} elsif ($pattern =~ /^\*/) {
                    205: 	    #*.msu.edu
                    206: 	    $pattern=~s/\*//;
                    207: 	    if (!defined($name)) {
                    208: 		use Socket;
                    209: 		my $netaddr=inet_aton($ip);
                    210: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  211: 	    }
1.152     albertel  212: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    213: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    214: 	    #127.0.0.1
                    215: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    216: 	} else {
                    217: 	    #some.name.com
                    218: 	    if (!defined($name)) {
                    219: 		use Socket;
                    220: 		my $netaddr=inet_aton($ip);
                    221: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    222: 	    }
                    223: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    224: 	}
                    225: 	if ($allowed) { last; }
                    226:     }
                    227:     return $allowed;
                    228: }
1.198     albertel  229: 
                    230: sub check_task_access {
1.207     albertel  231:     # does it pass normal muster
                    232:     # yes we really do want the default args passing
1.200     albertel  233:     my ($status,$datemsg)=&check_access;
                    234:     if ($status eq 'SHOW_ANSWER' ||
                    235: 	$status eq 'CLOSED' ||
                    236: 	$status eq 'CANNOT_ANSWER' ||
                    237: 	$status eq 'INVALID_ACCESS' ||
                    238: 	$status eq 'UNAVAILABLE') {
                    239: 	return ($status,$datemsg);
                    240:     }
1.204     albertel  241:     if ($env{'request.state'} eq "construct") {
1.203     albertel  242: 	return ($status,$datemsg);
                    243:     }
1.208     albertel  244:     my $version=$Apache::lonhomework::history{'resource.version'};
1.209     albertel  245:     if ($Apache::lonhomework::history{"resource.$version.checkedin"} &&
                    246: 	$Apache::lonhomework::history{"resource.$version.status"} eq 'pass') {
                    247: 	return ('SHOW_ANSWER');
1.207     albertel  248:     }
1.200     albertel  249:     my ($id)=@_;
1.210     albertel  250:     my @slots=
                    251: 	(split(':',&Apache::lonnet::EXT("resource.$id.availablestudent")),
                    252: 	 split(':',&Apache::lonnet::EXT("resource.$id.available")));
                    253: 
1.200     albertel  254: #    if (!@slots) {
                    255: #	return ($status,$datemsg);
                    256: #    }
                    257:     my $slotstatus='NOT_IN_A_SLOT';
1.206     albertel  258:     my ($returned_slot,$slot_name);
1.210     albertel  259:     foreach my $slot (@slots) {
1.201     albertel  260: 	&Apache::lonxml::debug("getting $slot");
1.200     albertel  261: 	my %slot=&Apache::lonnet::get_slot($slot);
1.201     albertel  262: 	&Apache::lonhomework::showhash(%slot);
1.200     albertel  263: 	if ($slot{'starttime'} < time &&
                    264: 	    $slot{'endtime'} > time &&
1.201     albertel  265: 	    &check_ip_acc($slot{'ip'})) {
1.202     albertel  266: 	    &Apache::lonxml::debug("$slot is good");
                    267: 	    $slotstatus='NEEDS_CHECKIN';
                    268: 	    $returned_slot=\%slot;
1.206     albertel  269: 	    $slot_name=$slot;
1.200     albertel  270: 	    last;
                    271: 	}
                    272:     }
1.202     albertel  273:     if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.207     albertel  274: 	&proctor_checked_in($slot_name,$returned_slot)) {
1.202     albertel  275: 	&Apache::lonxml::debug("protoctor checked in");
1.200     albertel  276: 	$slotstatus='CAN_ANSWER';
                    277:     }
1.209     albertel  278:     if ( $slotstatus eq 'NOT_IN_A_SLOT' && 
1.208     albertel  279: 	$Apache::lonhomework::history{"resource.$version.checkedin"}) {
1.209     albertel  280: 	if ($Apache::lonhomework::history{"resource.$version.status"} eq 'fail') {
                    281: 	    return ('SHOW_ANSWER');
                    282: 	} else {
                    283: 	    return ('WAITING_FOR_GRADE');
                    284: 	}
1.207     albertel  285:     }
1.206     albertel  286:     return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198     albertel  287: }
1.200     albertel  288: 
1.92      bowersj2  289: # JB, 9/24/2002: Any changes in this function may require a change
                    290: # in lonnavmaps::resource::getDateStatus.
1.53      www       291: sub check_access {
1.145     albertel  292:     my ($id) = @_;
                    293:     my $date ='';
                    294:     my $status;
                    295:     my $datemsg = '';
                    296:     my $lastdate = '';
                    297:     my $temp;
                    298:     my $type;
                    299:     my $passed;
                    300: 
1.204     albertel  301:     if ($env{'request.state'} eq "construct") {
                    302: 	if ($env{'form.problemstate'}) {
                    303: 	    if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
                    304: 		if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
1.167     albertel  305: 			lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168     albertel  306: 		    return ('CANNOT_ANSWER',
1.174     www       307: 			    &mt('is in this state due to author settings.'));
1.167     albertel  308: 		}
1.165     albertel  309: 	    } else {
1.204     albertel  310: 		return ($env{'form.problemstate'},
1.174     www       311: 			&mt('is in this state due to author settings.'));
1.165     albertel  312: 	    }
                    313: 	}
1.145     albertel  314: 	&Apache::lonxml::debug("in construction ignoring dates");
                    315: 	$status='CAN_ANSWER';
1.146     albertel  316: 	$datemsg=&mt('is in under construction');
1.163     albertel  317: #	return ($status,$datemsg);
1.145     albertel  318:     }
                    319: 
                    320:     &Apache::lonxml::debug("checking for part :$id:");
                    321:     &Apache::lonxml::debug("time:".time);
1.152     albertel  322: 
1.212     albertel  323:     my ($symb)=&Apache::lonxml::whichuser();
                    324:     &Apache::lonxml::debug("symb:".$symb);
                    325:     #if ($env{'request.state'} ne "construct" && $symb ne '') {
1.204     albertel  326:     if ($env{'request.state'} ne "construct") {
1.163     albertel  327: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    328: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    329: 	    $status='INVALID_ACCESS';
                    330: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  331: 	    return($status,$date);
                    332: 	}
1.163     albertel  333: 	
                    334: 	foreach $temp ("opendate","duedate","answerdate") {
                    335: 	    $lastdate = $date;
                    336: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    337: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    338: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    339: 		$date     =~ /^(con_lost|no_such_host)/) {
                    340: 		$status='UNAVAILABLE';
                    341: 		$date=&mt("may open later.");
                    342: 		return($status,$date);
                    343: 	    }
                    344: 	    if ($thistype eq 'date_interval') {
                    345: 		if ($temp eq 'opendate') {
                    346: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    347: 		}
                    348: 		if ($temp eq 'answerdate') {
                    349: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    350: 		}
1.145     albertel  351: 	    }
1.163     albertel  352: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    353: 	    if ($date eq '') {
                    354: 		$date = &mt("an unknown date"); $passed = 0;
                    355: 	    } elsif ($date eq 'con_lost') {
                    356: 		$date = &mt("an indeterminate date"); $passed = 0;
                    357: 	    } else {
                    358: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    359: 		$date = localtime $date;
1.145     albertel  360: 	    }
1.163     albertel  361: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  362: 	}
1.163     albertel  363: 	&Apache::lonxml::debug("have :$type:$passed:");
                    364: 	if ($passed) {
                    365: 	    $status='SHOW_ANSWER';
                    366: 	    $datemsg=$date;
                    367: 	} elsif ($type eq 'opendate') {
                    368: 	    $status='CLOSED';
                    369: 	    $datemsg = &mt("will open on")." $date";
                    370: 	} elsif ($type eq 'duedate') {
                    371: 	    $status='CAN_ANSWER';
                    372: 	    $datemsg = &mt("is due at")." $date";
                    373: 	} elsif ($type eq 'answerdate') {
                    374: 	    $status='CLOSED';
                    375: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  376: 	}
                    377:     }
1.212     albertel  378:     if ($status eq 'CAN_ANSWER' ||
                    379: 	(($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
1.145     albertel  380: 	#check #tries, and if correct.
                    381: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    382: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    383: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  384: 	if ( $maxtries eq '' && 
1.204     albertel  385: 	     $env{'request.state'} ne 'construct') { $maxtries = '2'; } 
1.164     albertel  386: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  387: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    388: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    389: 	    &&
                    390: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    391: 	   ||
                    392: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    393: 	    $status = 'CANNOT_ANSWER';
                    394: 	}
1.121     albertel  395:     }
1.181     albertel  396:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177     albertel  397: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
                    398: 	&Apache::lonxml::debug("looking for interval $interval");
                    399: 	if ($interval) {
                    400: 	    my $first_access=&Apache::lonnet::get_first_access('map');
                    401: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    402: 	    if (!$first_access) {
                    403: 		$status='NOT_YET_VIEWED';
1.192     albertel  404: 		$datemsg=&seconds_to_human_length($interval);
1.177     albertel  405: 	    } else {
                    406: 		my $newdate=localtime($first_access+$interval);
                    407: 		if (time > ($first_access+$interval)) {
                    408: 		    $status='CLOSED';
                    409: 		    $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
                    410: 		} else {
                    411: 		    $datemsg = &mt("is due at")." $newdate";
                    412: 		}
                    413: 	    }
                    414: 	}
                    415:     }
1.133     albertel  416:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    417:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    418:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    419:   #}
1.54      www       420: 
                    421: 
1.145     albertel  422:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    423:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    424: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    425: 	$status='CAN_ANSWER';
1.146     albertel  426: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  427:     }
1.106     albertel  428: 
1.145     albertel  429:     return ($status,$datemsg);
1.20      albertel  430: }
                    431: 
1.192     albertel  432: sub seconds_to_human_length {
                    433:     my ($length)=@_;
                    434: 
                    435:     my $seconds=$length%60; $length=int($length/60);
                    436:     my $minutes=$length%60; $length=int($length/60);
                    437:     my $hours=$length%24;   $length=int($length/24);
                    438:     my $days=$length;
                    439: 
                    440:     my $timestr;
                    441:     if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
                    442:     if ($hours > 0) { $timestr.=($timestr?", ":"").
                    443: 			  &mt('[quant,_1,hour]',$hours); }
                    444:     if ($minutes > 0) { $timestr.=($timestr?", ":"").
                    445: 			    &mt('[quant,_1,minute]',$minutes); }
                    446:     if ($seconds > 0) { $timestr.=($timestr?", ":"").
                    447: 			    &mt('[quant,_1,second]',$seconds); }
                    448:     return $timestr;
                    449: }
                    450: 
1.41      albertel  451: sub showhash {
1.145     albertel  452:     my (%hash) = @_;
                    453:     &showhashsubset(\%hash,'.');
                    454:     return '';
1.79      albertel  455: }
                    456: 
1.106     albertel  457: sub showarray {
                    458:     my ($array)=@_;
                    459:     my $string="(";
                    460:     foreach my $elm (@{ $array }) {
1.193     albertel  461: 	if (ref($elm) eq 'ARRAY') {
                    462: 	    $string.=&showarray($elm);
                    463: 	} elsif (ref($elm) eq 'HASH') {
                    464: 	    $string.= "HASH --- \n<br />";
                    465: 	    $string.= &showhashsubset($elm,'.');
1.106     albertel  466: 	} else {
                    467: 	    $string.="$elm,"
                    468: 	}
                    469:     }
                    470:     chop($string);
                    471:     $string.=")";
                    472:     return $string;
                    473: }
                    474: 
1.79      albertel  475: sub showhashsubset {
1.145     albertel  476:     my ($hash,$keyre) = @_;
                    477:     my $resultkey;
                    478:     foreach $resultkey (sort keys %$hash) {
1.193     albertel  479: 	if ($resultkey !~ /$keyre/) { next; }
                    480: 	if (ref($$hash{$resultkey})  eq 'ARRAY' ) {
                    481: 	    &Apache::lonxml::debug("$resultkey ---- ".
                    482: 				   &showarray($$hash{$resultkey}));
                    483: 	} elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
                    484: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    485: 	    &showhashsubset($$hash{$resultkey},'.');
                    486: 	} else {
                    487: 	    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145     albertel  488: 	}
                    489:     }
                    490:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    491:     return '';
1.41      albertel  492: }
                    493: 
                    494: sub setuppermissions {
1.204     albertel  495:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
                    496:     my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145     albertel  497:     if (! $viewgrades && 
1.204     albertel  498: 	exists($env{'request.course.sec'}) && 
                    499: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    500: 	$viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
                    501:                                                '/'.$env{'request.course.sec'});
1.145     albertel  502:     }
1.188     foxr      503:     $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
1.185     albertel  504:     if ($Apache::lonhomework::browse eq 'F' && 
1.204     albertel  505: 	$env{'form.devalidatecourseresdata'} eq 'on') {
1.185     albertel  506: 	my (undef,$courseid) = &Apache::lonxml::whichuser();
1.204     albertel  507: 	&Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
                    508: 					      $env{"course.$courseid.domain"});
1.185     albertel  509:     }
1.205     albertel  510:     my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
                    511:     if (! $modifygrades && 
                    512: 	exists($env{'request.course.sec'}) && 
                    513: 	$env{'request.course.sec'} !~ /^\s*$/) {
                    514: 	$modifygrades = 
                    515: 	    &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
                    516: 				     '/'.$env{'request.course.sec'});
                    517:     }
                    518:     $Apache::lonhomework::modifygrades = $modifygrades;
                    519:     return '';
1.41      albertel  520: }
                    521: 
                    522: sub setupheader {
1.120     albertel  523:     my $request=$_[0];
1.197     albertel  524:     &Apache::loncommon::content_type($request,'text/html');
1.120     albertel  525:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    526: 	&Apache::loncommon::no_cache($request);
                    527:     }
1.196     albertel  528: #    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                    529: #							  'lastrevisiondate'));
1.120     albertel  530:     $request->send_http_header;
                    531:     return OK if $request->header_only;
                    532:     return ''
1.41      albertel  533: }
1.35      albertel  534: 
1.47      albertel  535: sub handle_save_or_undo {
1.145     albertel  536:     my ($request,$problem,$result) = @_;
                    537:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    538:     my $filebak =$file.".bak";
                    539:     my $filetmp =$file.".tmp";
                    540:     my $error=0;
1.156     albertel  541: 
                    542:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  543: 
1.204     albertel  544:     if ($env{'form.Undo'} eq &mt('undo')) {
1.145     albertel  545: 	my $error=0;
                    546: 	if (!copy($file,$filetmp)) { $error=1; }
                    547: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    548: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    549: 	if (!$error) {
1.171     albertel  550: 	    &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  551: 	} else {
1.171     albertel  552: 	    &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  553: 	    $error=1;
                    554: 	}
1.52      albertel  555:     } else {
1.145     albertel  556: 	my $fs=Apache::File->new(">$filebak");
                    557: 	if (defined($fs)) {
                    558: 	    print $fs $$problem;
1.171     albertel  559: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to").
                    560: 				  " $filebak</b>");
1.145     albertel  561: 	} else {
1.171     albertel  562: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  563: 	    $error=2;
                    564: 	}
                    565: 	my $fh=Apache::File->new(">$file");
                    566: 	if (defined($fh)) {
                    567: 	    print $fh $$result;
1.171     albertel  568: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
                    569: 				  " $file</b>");
1.145     albertel  570: 	} else {
1.171     albertel  571: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
                    572: 				  &mt("Unable to write to")." $file</b></font>");
1.145     albertel  573: 	    $error|=4;
                    574: 	}
1.52      albertel  575:     }
1.145     albertel  576:     return $error;
1.64      albertel  577: }
                    578: 
1.101     albertel  579: sub analyze_header {
                    580:     my ($request) = @_;
1.183     albertel  581:     my $bodytag='<body bgcolor="#ffffff">';
1.204     albertel  582:     if ($env{'environment.remote'} eq 'off') {
1.183     albertel  583: 	$bodytag=&Apache::loncommon::bodytag();
                    584:     }
1.197     albertel  585:     my $html=&Apache::lonxml::xmlbegin();
                    586:     my $result.=$html.'
1.146     albertel  587:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.183     albertel  588:             '.$bodytag.&Apache::lonxml::message_location().'
1.101     albertel  589:             <form name="lonhomework" method="POST" action="'.
1.204     albertel  590: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  591: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  592:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    593:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  594:             <hr />
1.146     albertel  595:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  596:             <hr />
                    597:             </form>';
1.171     albertel  598:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  599:     $request->print($result);
                    600:     $request->rflush();
                    601: }
                    602: 
1.109     albertel  603: sub analyze_footer {
                    604:     my ($request) = @_;
                    605:     my $result='</body></html>';
                    606:     $request->print($result);
                    607:     $request->rflush();
                    608: }
                    609: 
1.74      albertel  610: sub analyze {
1.101     albertel  611:     my ($request,$file) = @_;
                    612:     &Apache::lonxml::debug("Analyze");
                    613:     my $result;
                    614:     my %overall;
                    615:     my %allparts;
1.204     albertel  616:     my $rndseed=$env{'form.rndseed'};
1.101     albertel  617:     &analyze_header($request);
1.114     albertel  618:     my %prog_state=
1.146     albertel  619: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    620: 					      &mt('Getting Problem Variants'),
1.204     albertel  621: 					      $env{'form.numtoanalyze'},
1.175     albertel  622: 					      'inline',undef);
1.204     albertel  623:     for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  624: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  625: 						 &mt('last problem'));
1.182     albertel  626: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.101     albertel  627: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    628: 					   ('grade_target' => 'analyze'),
1.130     albertel  629: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  630: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    631: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  632: 	my @parts;
                    633: 	if (defined(@{ $analyze{'parts'} })) {
                    634: 	    @parts=@{ $analyze{'parts'} };
                    635: 	}
1.101     albertel  636: 	foreach my $part (@parts) {
                    637: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  638: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    639: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    640: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  641: 		push( @{ $overall{$part.'.answer'} },
                    642: 		      [@{ $analyze{$part.'.answer'} }]);
                    643: 	    }
                    644: 	}
                    645:     }
1.114     albertel  646:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  647: 					  &mt('Analyzing Results'));
1.175     albertel  648:     $request->print('<hr />'.&mt('List of possible answers').': ');
1.134     albertel  649:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  650: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  651: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.184     albertel  652: 	    $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
1.130     albertel  653: 	    my %frequency;
1.109     albertel  654: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  655: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  656: 	    }
1.184     albertel  657: 	    $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
1.132     albertel  658: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    659: 		$request->print('<tr><td align="right">'.
                    660: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  661: 				'</td><td>('.$frequency{$answer}.
                    662: 				')</td></tr>');
1.109     albertel  663: 	    }
                    664: 	    $request->print('</table>');
                    665: 	} else {
1.162     albertel  666: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  667: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  668: 	}
                    669:     }
1.130     albertel  670:     if (scalar(keys(%allparts)) == 0 ) {
1.215     raeburn   671: 	$request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  672:     }
1.114     albertel  673:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  674:     &analyze_footer($request);
1.101     albertel  675:     &Apache::lonhomework::showhash(%overall);
                    676:     return $result;
1.74      albertel  677: }
                    678: 
1.64      albertel  679: sub editxmlmode {
1.145     albertel  680:     my ($request,$file) = @_;
                    681:     my $result;
                    682:     my $problem=&Apache::lonnet::getfile($file);
                    683:     if ($problem eq -1) {
1.146     albertel  684: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    685: 			       " <i>$file</i></b>");
1.145     albertel  686: 	$problem='';
                    687:     }
1.204     albertel  688:     if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
1.145     albertel  689: 	my $error=&handle_save_or_undo($request,\$problem,
1.204     albertel  690: 				       \$env{'form.editxmltext'});
1.145     albertel  691: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    692:     }
1.204     albertel  693:     &Apache::lonhomework::showhashsubset(\%env,'^form');
                    694:     if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
                    695: 	&Apache::lonhomework::showhashsubset(\%env,'^form');
                    696: 	$env{'form.problemmode'}='View';
1.145     albertel  697: 	&renderpage($request,$file);
                    698:     } else {
                    699: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       700: 	my $xml_help = '<table><tr><td>'.
                    701: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    702: 						    "Problem Editing Help").
                    703: 						    '</td><td>'.
1.178     albertel  704:        &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
                    705:                 '</td></tr></table>';
1.145     albertel  706: 	if ($cols > 80) { $cols = 80; }
                    707: 	if ($cols < 70) { $cols = 70; }
                    708: 	if ($rows < 20) { $rows = 20; }
1.183     albertel  709: 	my $bodytag='<body bgcolor="#ffffff">';
1.204     albertel  710: 	if ($env{'environment.remote'} eq 'off') {
1.183     albertel  711: 	    $bodytag=&Apache::loncommon::bodytag();
                    712: 	}
1.197     albertel  713: 	my $html=&Apache::lonxml::xmlbegin();
1.213     albertel  714: 	$result.=$html.$bodytag.
                    715: 	    &renderpage($request,$file,['no_output_web'],1).
                    716: 	    &Apache::lonxml::message_location().'
1.64      albertel  717:             <form name="lonhomework" method="POST" action="'.
1.204     albertel  718: 	    &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179     albertel  719: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  720:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170     matthew   721:             <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    722:             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.64      albertel  723:             <hr />
1.170     matthew   724:             <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                    725:             <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
                    726:             <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64      albertel  727:             <hr />
1.110     albertel  728:             ' . $xml_help . '
1.199     albertel  729:             <textarea style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.172     albertel  730: 	    &HTML::Entities::encode($problem,'<>&"').'</textarea>
1.64      albertel  731:             </form></body></html>';
1.171     albertel  732: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  733: 	$request->print($result);
                    734:     }
                    735:     return '';
1.47      albertel  736: }
1.189     albertel  737: 
1.188     foxr      738: #
                    739: #    Render the page in whatever target desired.
                    740: #
1.41      albertel  741: sub renderpage {
1.213     albertel  742:     my ($request,$file,$targets,$return_string) = @_;
1.52      albertel  743: 
1.211     albertel  744:     my @targets = @{$targets || [&get_target()]};
1.204     albertel  745:     &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145     albertel  746:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171     albertel  747:     my $overall_result;
1.145     albertel  748:     foreach my $target (@targets) {
1.183     albertel  749: 	# FIXME need to do something intelligent when a problem goes
                    750:         # from viewable to not viewable due to map conditions
                    751: 	#&setuppermissions();
                    752: 	#if (   $Apache::lonhomework::browse ne '2'
                    753: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                    754: 	#    $request->print(" You most likely shouldn't see me.");
                    755: 	#}
1.145     albertel  756: 	#my $t0 = [&gettimeofday()];
1.211     albertel  757: 	my $output=1;
                    758: 	if ($target eq 'no_output_web') {
                    759: 	    $target = 'web'; $output=0;
                    760: 	}
1.145     albertel  761: 	my $problem=&Apache::lonnet::getfile($file);
                    762: 	if ($problem eq -1) {
1.146     albertel  763: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  764: 	    $problem='';
                    765: 	}
1.52      albertel  766: 
1.145     albertel  767: 	my %mystyle;
                    768: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    769: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204     albertel  770: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145     albertel  771: 
                    772: 	&Apache::lonxml::debug("Should be parsing now");
1.211     albertel  773: 	my $result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    774: 					       &setup_vars($target),%mystyle);
1.145     albertel  775: 	undef($Apache::lonhomework::parsing_a_problem);
1.214     albertel  776: 	if (!$output) { $result = ''; }
1.145     albertel  777: 	#$request->print("Result follows:");
                    778: 	if ($target eq 'modified') {
                    779: 	    &handle_save_or_undo($request,\$problem,\$result);
                    780: 	} else {
                    781: 	    if ($target eq 'analyze') {
                    782: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    783: 		undef(%Apache::lonhomework::analyze);
                    784: 	    }
                    785: 	    #my $td=&tv_interval($t0);
                    786: 	    #if ( $Apache::lonxml::debug) {
                    787: 	    #$result =~ s:</body>::;
                    788: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    789: 	    #}
1.171     albertel  790: #	    $request->print($result);
                    791: 	    $overall_result.=$result;
                    792: #	    $request->rflush();
1.145     albertel  793: 	}
                    794: 	#$request->print(":Result ends");
                    795: 	#my $td=&tv_interval($t0);
1.52      albertel  796:     }
1.213     albertel  797:     if (!$return_string) {
                    798: 	&Apache::lonxml::add_messages(\$overall_result);
                    799: 	$request->print($overall_result);   
                    800: 	$request->rflush();   
                    801:     } else {
                    802: 	return $overall_result;
                    803:     }
1.41      albertel  804: }
                    805: 
1.42      albertel  806: # with no arg it returns a HTML <option> list of the template titles
                    807: # with one arg it returns the filename associated with the arg passed
                    808: sub get_template_list {
1.145     albertel  809:     my ($namewanted,$extension) = @_;
                    810:     my $result;
                    811:     my @allnames;
                    812:     &Apache::lonxml::debug("Looking for :$extension:");
                    813:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    814: 	my $name=&Apache::lonnet::metadata($file,'title');
                    815: 	if ($namewanted && ($name eq $namewanted)) {
                    816: 	    $result=$file;
                    817: 	    last;
                    818: 	} else {
                    819: 	    if ($name) { push (@allnames, $name); }
                    820: 	}
                    821:     }
                    822:     if (@allnames && !$result) {
1.146     albertel  823: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  824: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  825:     }
1.145     albertel  826:     return $result;
1.42      albertel  827: }
                    828: 
                    829: sub newproblem {
1.65      matthew   830:     my ($request) = @_;
                    831:     my $extension=$request->uri;
                    832:     $extension=~s:^.*\.([\w]+)$:$1:;
                    833:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  834:     my $templatelist=&get_template_list('',$extension);
1.204     albertel  835:     if ($env{'form.template'} &&
                    836: 	$env{'form.template'} ne "Select a $extension template") {
1.65      matthew   837: 	use File::Copy;
1.204     albertel  838: 	my $file = &get_template_list($env{'form.template'},$extension);
1.65      matthew   839: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    840: 	copy($file,$dest);
                    841: 	&renderpage($request,$dest);
1.204     albertel  842:     } elsif($env{'form.newfile'} && !$templatelist) {
1.131     albertel  843: 	# I don't like hard-coded filenames but for now, this will work.
                    844: 	use File::Copy;
                    845: 	my $templatefilename =
                    846: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    847: 	&Apache::lonxml::debug("$templatefilename");
                    848: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    849: 	copy($templatefilename,$dest);
                    850: 	&renderpage($request,$dest);
1.85      albertel  851:     } else {
1.176     albertel  852: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                    853: 	my $shownurl=$url;	
1.157     albertel  854: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   855: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  856: 	my $errormsg;
1.204     albertel  857: 	if ($env{'form.newfile'}) {
1.146     albertel  858: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  859: 	}
1.85      albertel  860: 	my $instructions;
1.186     albertel  861: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
1.204     albertel  862: 					($env{'environment.remote'} ne 'off'));
1.146     albertel  863: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  864: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  865: 			  'resource' => 'resource',
                    866: 			  'requested' => 'The requested file',
                    867: 			  'not exist' => 'currently does not exist',
                    868: 			  'createnew' => 'To create a new',
                    869: 			  'click' => 'click on the',
                    870: 			  'Create' => 'Create',
                    871: 			  'button' => 'button');
1.65      matthew   872: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       873: $bodytag
1.148     albertel  874: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  875: $errormsg
1.157     albertel  876: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       877: <p>
1.146     albertel  878: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       879: </p>
                    880: <p><form action="$url" method="POST">
1.42      albertel  881: ENDNEWPROBLEM
1.85      albertel  882: 	if (defined($templatelist)) {
                    883: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    884: 	}
1.146     albertel  885: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       886: 	$request->print("</form></p></body>");
1.65      matthew   887:     }
                    888:     return '';
1.42      albertel  889: }
                    890: 
                    891: sub view_or_edit_menu {
1.145     albertel  892:     my ($request) = @_;
1.176     albertel  893:     my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.147     albertel  894:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  895: 		      'view' => 'View',
                    896: 		      'Edit' => 'edit',
                    897: 		      'or' => 'or',
                    898: 		      'the problem' => 'the problem');
1.145     albertel  899:     $request->print(<<EDITMENU);
1.42      albertel  900: <body bgcolor="#FFFFFF">
                    901: <form action="$url" method="POST">
1.170     matthew   902: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
                    903: &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
1.146     albertel  904: &lt{'the problem'}.
1.42      albertel  905: </form>
                    906: </body>
                    907: EDITMENU
                    908: }
                    909: 
1.41      albertel  910: sub handler {
1.145     albertel  911:     #my $t0 = [&gettimeofday()];
                    912:     my $request=$_[0];
                    913:     
1.204     albertel  914:     $Apache::lonxml::debug=$env{'user.debug'};
                    915:     $env{'request.uri'}=$request->uri;
1.180     albertel  916:     &setuppermissions();
1.145     albertel  917:     # some times multiple problemmodes are submitted, need to select
                    918:     # the last one
1.204     albertel  919:     if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
                    920: 	my $mode=$env{'form.problemmode'}->[-1];
                    921: 	undef $env{'form.problemmode'};
                    922: 	$env{'form.problemmode'}=$mode;
1.145     albertel  923:     }
1.193     albertel  924: 
1.145     albertel  925:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    926: 
                    927:     #check if we know where we are
1.204     albertel  928:     if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
1.145     albertel  929: 	# if we are browsing we might not be able to know where we are
1.173     albertel  930: 	if ($Apache::lonhomework::browse ne 'F' && 
1.204     albertel  931: 	    $env{'request.state'} ne "construct") {
1.145     albertel  932: 	    #should know where we are, so ask
                    933: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    934: 		&Apache::lonnet::cleanenv();
                    935: 	    }
1.190     albertel  936: 	    &Apache::lonnet::logthis(&Apache::lonnet::mod_perl_version());
                    937: 	    $request->internal_redirect('/adm/ambiguous'); return OK;
1.145     albertel  938: 	}
                    939:     }
1.187     albertel  940:     if (&setupheader($request)) { return OK; }
1.193     albertel  941:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
1.204     albertel  942:     &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.145     albertel  943:     my ($symb) = &Apache::lonxml::whichuser();
                    944:     &Apache::lonxml::debug('symb is '.$symb);
1.204     albertel  945:     if ($env{'request.state'} eq "construct" || $symb eq '') {
                    946: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    947: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    948: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  949: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    950: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    951: 	    &Apache::lonxml::debug("Attempt reset");
                    952: 	}
                    953:     }
1.204     albertel  954:     if ($env{'request.state'} eq "construct") {
1.145     albertel  955: 	if ( -e $file ) {
                    956: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    957: 						    ['problemmode']);
1.204     albertel  958: 	    if (!(defined $env{'form.problemmode'})) {
1.145     albertel  959: 		#first visit to problem in construction space
                    960: 		#&view_or_edit_menu($request);
1.204     albertel  961: 		$env{'form.problemmode'}='View';
1.145     albertel  962: 		&renderpage($request,$file);
1.204     albertel  963: 	    } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
                    964: 		     $env{'form.problemmode'} eq 'EditXML') {
1.145     albertel  965: 		&editxmlmode($request,$file);
1.204     albertel  966: 	    } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  967: 		&analyze($request,$file);
                    968: 	    } else {
                    969: 		&renderpage($request,$file);
                    970: 	    }
                    971: 	} else {
                    972: 	    # requested file doesn't exist in contruction space
                    973: 	    &newproblem($request);
                    974: 	}
                    975:     } else {
                    976: 	# just render the page normally outside of construction space
                    977: 	&Apache::lonxml::debug("not construct");
1.52      albertel  978: 	&renderpage($request,$file);
1.41      albertel  979:     }
1.145     albertel  980:     #my $td=&tv_interval($t0);
                    981:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    982:     # &Apache::lonhomework::send_footer($request);
                    983:     # always turn off debug messages
                    984:     $Apache::lonxml::debug=0;
                    985:     return OK;
1.52      albertel  986: 
1.1       albertel  987: }
                    988: 
                    989: 1;
                    990: __END__

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