Annotation of loncom/homework/lonhomework.pm, revision 1.166

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.166   ! albertel    4: # $Id: lonhomework.pm,v 1.165 2004/02/16 17:20:39 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();
                     33: use Apache::lonnet();
                     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();
1.26      www        50: use Apache::Constants qw(:common);
1.73      albertel   51: use HTML::Entities();
1.83      albertel   52: use Apache::loncommon();
1.146     albertel   53: use Apache::lonlocal;
1.47      albertel   54: #use Time::HiRes qw( gettimeofday tv_interval );
1.43      albertel   55: 
1.69      harris41   56: BEGIN {
1.145     albertel   57:     &Apache::lonxml::register_insert();
1.43      albertel   58: }
                     59: 
1.5       albertel   60: sub get_target {
1.145     albertel   61:     if (($ENV{'request.state'} eq "published") ||
                     62: 	($ENV{'request.state'} eq "uploaded")) {
                     63: 	if ( defined($ENV{'form.grade_target'}  ) 
                     64: 	     && ($ENV{'form.grade_target'} eq 'tex')) {
                     65: 	    return ($ENV{'form.grade_target'});
                     66: 	} elsif ( defined($ENV{'form.grade_target'}  ) 
                     67: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
                     68: 	    return ($ENV{'form.grade_target'});
                     69: 	}
                     70: 
1.62      albertel   71: 	if ( defined($ENV{'form.submitted'}) &&
1.145     albertel   72: 	     ( !defined($ENV{'form.resetdata'})) &&
                     73: 	     ( !defined($ENV{'form.newrandomization'}))) {
                     74: 	    return ('grade', 'web');
                     75: 	} else {
                     76: 	    return ('web');
                     77: 	}
                     78:     } elsif ($ENV{'request.state'} eq "construct") {
                     79: 	if ( defined($ENV{'form.grade_target'}) ) {
                     80: 	    return ($ENV{'form.grade_target'});
                     81: 	}
                     82: 	if ( defined($ENV{'form.preview'})) {
                     83: 	    if ( defined($ENV{'form.submitted'})) {
                     84: 		return ('grade', 'web');
                     85: 	    } else {
                     86: 		return ('web');
                     87: 	    }
                     88: 	} else {
1.150     albertel   89: 	    if ( $ENV{'form.problemmode'} eq &mt('View') ||
                     90: 		 $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
1.145     albertel   91: 		if ( defined($ENV{'form.submitted'}) &&
                     92: 		     (!defined($ENV{'form.resetdata'})) &&
                     93: 		     (!defined($ENV{'form.newrandomization'}))) {
                     94: 		    return ('grade', 'web','answer');
                     95: 		} else {
                     96: 		    return ('web','answer');
                     97: 		}
1.150     albertel   98: 	    } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
1.145     albertel   99: 		if ( $ENV{'form.submitted'} eq 'edit' ) {
1.150     albertel  100: 		    if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  101: 			return ('modified','web','answer');
                    102: 		    } else {
                    103: 			return ('modified','edit');
                    104: 		    }
                    105: 		} else {
                    106: 		    return ('edit');
                    107: 		}
                    108: 	    } else {
                    109: 		return ('web');
                    110: 	    }
                    111: 	}
1.15      albertel  112:     }
1.145     albertel  113:     return ();
1.5       albertel  114: }
                    115: 
1.3       albertel  116: sub setup_vars {
1.145     albertel  117:     my ($target) = @_;
                    118:     return ';'
1.11      albertel  119: #  return ';$external::target='.$target.';';
1.2       albertel  120: }
                    121: 
                    122: sub send_header {
1.145     albertel  123:     my ($request)= @_;
                    124:     $request->print(&Apache::lontexconvert::header());
1.16      albertel  125: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  126: }
                    127: 
1.36      albertel  128: sub createmenu {
1.145     albertel  129:     my ($which,$request)=@_;
                    130:     if ($which eq 'grade') {
                    131: 	$request->print('<script language="JavaScript"> 
1.91      albertel  132:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  133:                  "height=350,width=150,menubar=no");
                    134:           </script>');
1.145     albertel  135:     }
1.36      albertel  136: }
                    137: 
1.2       albertel  138: sub send_footer {
1.145     albertel  139:     my ($request)= @_;
1.16      albertel  140: #  $request->print('</form>');
1.145     albertel  141:     $request->print(&Apache::lontexconvert::footer());
1.2       albertel  142: }
                    143: 
1.52      albertel  144: $Apache::lonxml::browse='';
1.53      www       145: 
1.152     albertel  146: sub check_ip_acc {
                    147:     my ($acc)=@_;
1.154     albertel  148:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  149:     my $allowed=0;
                    150:     my $ip=$ENV{'REMOTE_ADDR'};
                    151:     my $name;
                    152:     foreach my $pattern (split(',',$acc)) {
                    153: 	if ($pattern =~ /\*$/) {
                    154: 	    #35.8.*
                    155: 	    $pattern=~s/\*//;
                    156: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    157: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    158: 	    #35.8.3.[34-56]
                    159: 	    my $low=$2;
                    160: 	    my $high=$3;
                    161: 	    $pattern=$1;
                    162: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    163: 		my $last=(split(/\./,$ip))[3];
                    164: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    165: 	    }
                    166: 	} elsif ($pattern =~ /^\*/) {
                    167: 	    #*.msu.edu
                    168: 	    $pattern=~s/\*//;
                    169: 	    if (!defined($name)) {
                    170: 		use Socket;
                    171: 		my $netaddr=inet_aton($ip);
                    172: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  173: 	    }
1.152     albertel  174: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    175: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    176: 	    #127.0.0.1
                    177: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    178: 	} else {
                    179: 	    #some.name.com
                    180: 	    if (!defined($name)) {
                    181: 		use Socket;
                    182: 		my $netaddr=inet_aton($ip);
                    183: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    184: 	    }
                    185: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    186: 	}
                    187: 	if ($allowed) { last; }
                    188:     }
                    189:     return $allowed;
                    190: }
1.92      bowersj2  191: # JB, 9/24/2002: Any changes in this function may require a change
                    192: # in lonnavmaps::resource::getDateStatus.
1.53      www       193: sub check_access {
1.145     albertel  194:     my ($id) = @_;
                    195:     my $date ='';
                    196:     my $status;
                    197:     my $datemsg = '';
                    198:     my $lastdate = '';
                    199:     my $temp;
                    200:     my $type;
                    201:     my $passed;
                    202: 
                    203:     if ($ENV{'request.state'} eq "construct") {
1.166   ! albertel  204: 	if ($ENV{'form.problemstatus'}) {
1.165     albertel  205: 	    if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
                    206: 		return ('CANNOT_ANSWER','is in this state by royal decree.');
                    207: 	    } else {
                    208: 		return ($ENV{'form.problemstate'},
                    209: 			'is in this state by royal decree.');
                    210: 	    }
                    211: 	}
1.145     albertel  212: 	&Apache::lonxml::debug("in construction ignoring dates");
                    213: 	$status='CAN_ANSWER';
1.146     albertel  214: 	$datemsg=&mt('is in under construction');
1.163     albertel  215: #	return ($status,$datemsg);
1.145     albertel  216:     }
                    217: 
                    218:     &Apache::lonxml::debug("checking for part :$id:");
                    219:     &Apache::lonxml::debug("time:".time);
1.152     albertel  220: 
1.163     albertel  221:     if ($ENV{'request.state'} ne "construct") {
                    222: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    223: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    224: 	    $status='INVALID_ACCESS';
                    225: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  226: 	    return($status,$date);
                    227: 	}
1.163     albertel  228: 	
                    229: 	foreach $temp ("opendate","duedate","answerdate") {
                    230: 	    $lastdate = $date;
                    231: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    232: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    233: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    234: 		$date     =~ /^(con_lost|no_such_host)/) {
                    235: 		$status='UNAVAILABLE';
                    236: 		$date=&mt("may open later.");
                    237: 		return($status,$date);
                    238: 	    }
                    239: 	    if ($thistype eq 'date_interval') {
                    240: 		if ($temp eq 'opendate') {
                    241: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    242: 		}
                    243: 		if ($temp eq 'answerdate') {
                    244: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    245: 		}
1.145     albertel  246: 	    }
1.163     albertel  247: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    248: 	    if ($date eq '') {
                    249: 		$date = &mt("an unknown date"); $passed = 0;
                    250: 	    } elsif ($date eq 'con_lost') {
                    251: 		$date = &mt("an indeterminate date"); $passed = 0;
                    252: 	    } else {
                    253: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    254: 		$date = localtime $date;
1.145     albertel  255: 	    }
1.163     albertel  256: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  257: 	}
1.163     albertel  258: 	&Apache::lonxml::debug("have :$type:$passed:");
                    259: 	if ($passed) {
                    260: 	    $status='SHOW_ANSWER';
                    261: 	    $datemsg=$date;
                    262: 	} elsif ($type eq 'opendate') {
                    263: 	    $status='CLOSED';
                    264: 	    $datemsg = &mt("will open on")." $date";
                    265: 	} elsif ($type eq 'duedate') {
                    266: 	    $status='CAN_ANSWER';
                    267: 	    $datemsg = &mt("is due at")." $date";
                    268: 	} elsif ($type eq 'answerdate') {
                    269: 	    $status='CLOSED';
                    270: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  271: 	}
                    272:     }
                    273:     if ($status eq 'CAN_ANSWER') {
                    274: 	#check #tries, and if correct.
                    275: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    276: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    277: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  278: 	if ( $maxtries eq '' && 
                    279: 	     $ENV{'request.state'} ne 'construct') { $maxtries = '2'; } 
                    280: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  281: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    282: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    283: 	    &&
                    284: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    285: 	   ||
                    286: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    287: 	    $status = 'CANNOT_ANSWER';
                    288: 	}
1.121     albertel  289:     }
1.54      www       290: 
1.133     albertel  291:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    292:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    293:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    294:   #}
1.54      www       295: 
                    296: 
1.145     albertel  297:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    298:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    299: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    300: 	$status='CAN_ANSWER';
1.146     albertel  301: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  302:     }
1.106     albertel  303: 
1.145     albertel  304:     return ($status,$datemsg);
1.20      albertel  305: }
                    306: 
1.41      albertel  307: sub showhash {
1.145     albertel  308:     my (%hash) = @_;
                    309:     &showhashsubset(\%hash,'.');
                    310:     return '';
1.79      albertel  311: }
                    312: 
1.106     albertel  313: sub showarray {
                    314:     my ($array)=@_;
                    315:     my $string="(";
                    316:     foreach my $elm (@{ $array }) {
                    317: 	if (ref($elm)) {
                    318: 	    if ($elm =~ /ARRAY/ ) {
                    319: 		$string.=&showarray($elm);
                    320: 	    }
                    321: 	} else {
                    322: 	    $string.="$elm,"
                    323: 	}
                    324:     }
                    325:     chop($string);
                    326:     $string.=")";
                    327:     return $string;
                    328: }
                    329: 
1.79      albertel  330: sub showhashsubset {
1.145     albertel  331:     my ($hash,$keyre) = @_;
                    332:     my $resultkey;
                    333:     foreach $resultkey (sort keys %$hash) {
                    334: 	if ($resultkey =~ /$keyre/) {
                    335: 	    if (ref($$hash{$resultkey})) {
                    336: 		if ($$hash{$resultkey} =~ /ARRAY/ ) {
                    337: 		    &Apache::lonxml::debug("$resultkey ---- ".
                    338: 					   &showarray($$hash{$resultkey}));
                    339: 		} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    340: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    341: 		    &showhashsubset($$hash{$resultkey},'.');
                    342: 		} else {
                    343: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    344: 		}
                    345: 	    } else {
                    346: 		&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    347: 	    }
                    348: 	}
                    349:     }
                    350:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    351:     return '';
1.41      albertel  352: }
                    353: 
                    354: sub setuppermissions {
1.145     albertel  355:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    356:     my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    357:     if (! $viewgrades && 
                    358: 	exists($ENV{'request.course.sec'}) && 
                    359: 	$ENV{'request.course.sec'} !~ /^\s*$/) {
                    360: 	$viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
1.127     matthew   361:                                                '/'.$ENV{'request.course.sec'});
1.145     albertel  362:     }
                    363:     $Apache::lonhomework::viewgrades = $viewgrades;
                    364:     return ''
1.41      albertel  365: }
                    366: 
                    367: sub setupheader {
1.120     albertel  368:     my $request=$_[0];
                    369:     if ($ENV{'browser.mathml'}) {
1.151     www       370: 	&Apache::loncommon::content_type($request,'text/xml');
1.120     albertel  371:     } else {
1.151     www       372: 	&Apache::loncommon::content_type($request,'text/html');
1.120     albertel  373:     }
                    374:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    375: 	&Apache::loncommon::no_cache($request);
                    376:     }
                    377:     $request->send_http_header;
                    378:     return OK if $request->header_only;
                    379:     return ''
1.41      albertel  380: }
1.35      albertel  381: 
1.47      albertel  382: sub handle_save_or_undo {
1.145     albertel  383:     my ($request,$problem,$result) = @_;
                    384:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    385:     my $filebak =$file.".bak";
                    386:     my $filetmp =$file.".tmp";
                    387:     my $error=0;
1.156     albertel  388: 
                    389:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  390: 
1.150     albertel  391:     if ($ENV{'form.Undo'} eq &mt('undo')) {
1.145     albertel  392: 	my $error=0;
                    393: 	if (!copy($file,$filetmp)) { $error=1; }
                    394: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    395: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    396: 	if (!$error) {
1.146     albertel  397: 	    $request->print("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  398: 	} else {
1.146     albertel  399: 	    $request->print("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
1.145     albertel  400: 	    $error=1;
                    401: 	}
1.52      albertel  402:     } else {
1.145     albertel  403: 	my $fs=Apache::File->new(">$filebak");
                    404: 	if (defined($fs)) {
                    405: 	    print $fs $$problem;
1.146     albertel  406: 	    $request->print("<b>".&mt("Making Backup to").
                    407: 			    " $filebak</b><br />");
1.145     albertel  408: 	} else {
1.146     albertel  409: 	    $request->print("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  410: 	    $error=2;
                    411: 	}
                    412: 	my $fh=Apache::File->new(">$file");
                    413: 	if (defined($fh)) {
                    414: 	    print $fh $$result;
1.146     albertel  415: 	    $request->print("<b>".&mt("Saving Modifications to").
                    416: 			    " $file</b><br />");
1.145     albertel  417: 	} else {
1.146     albertel  418: 	    $request->print("<font color=\"red\" size=\"+1\"><b>".
                    419: 			    &mt("Unable to write to")." $file</b></font>");
1.145     albertel  420: 	    $error|=4;
                    421: 	}
1.52      albertel  422:     }
1.145     albertel  423:     return $error;
1.64      albertel  424: }
                    425: 
1.101     albertel  426: sub analyze_header {
                    427:     my ($request) = @_;
1.109     albertel  428:     my $result.='<html>
1.146     albertel  429:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.109     albertel  430:             <body bgcolor="#FFFFFF">
1.101     albertel  431:             <form name="lonhomework" method="POST" action="'.
1.145     albertel  432: 	    $ENV{'request.uri'}.'">
1.146     albertel  433:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    434:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  435:             <hr />
1.146     albertel  436:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  437:             <hr />
1.146     albertel  438:             '.&mt('List of possible answers').':
1.101     albertel  439:             </form>';
                    440:     $request->print($result);
                    441:     $request->rflush();
                    442: }
                    443: 
1.109     albertel  444: sub analyze_footer {
                    445:     my ($request) = @_;
                    446:     my $result='</body></html>';
                    447:     $request->print($result);
                    448:     $request->rflush();
                    449: }
                    450: 
1.74      albertel  451: sub analyze {
1.101     albertel  452:     my ($request,$file) = @_;
                    453:     &Apache::lonxml::debug("Analyze");
                    454:     my $result;
                    455:     my %overall;
                    456:     my %allparts;
                    457:     my $rndseed=$ENV{'form.rndseed'};
                    458:     &analyze_header($request);
1.114     albertel  459:     my %prog_state=
1.146     albertel  460: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    461: 					      &mt('Getting Problem Variants'),
1.114     albertel  462: 					      $ENV{'form.numtoanalyze'});
1.102     albertel  463:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  464: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  465: 						 &mt('last problem'));
1.101     albertel  466: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    467: 					   ('grade_target' => 'analyze'),
1.130     albertel  468: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  469: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    470: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  471: 	my @parts;
                    472: 	if (defined(@{ $analyze{'parts'} })) {
                    473: 	    @parts=@{ $analyze{'parts'} };
                    474: 	}
1.101     albertel  475: 	foreach my $part (@parts) {
                    476: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  477: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    478: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    479: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  480: 		push( @{ $overall{$part.'.answer'} },
                    481: 		      [@{ $analyze{$part.'.answer'} }]);
                    482: 	    }
                    483: 	}
                    484:     }
1.114     albertel  485:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  486: 					  &mt('Analyzing Results'));
1.134     albertel  487:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  488: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  489: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.146     albertel  490: 	    $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
1.130     albertel  491: 	    my %frequency;
1.109     albertel  492: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  493: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  494: 	    }
1.146     albertel  495: 	    $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
1.132     albertel  496: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    497: 		$request->print('<tr><td align="right">'.
                    498: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  499: 				'</td><td>('.$frequency{$answer}.
                    500: 				')</td></tr>');
1.109     albertel  501: 	    }
                    502: 	    $request->print('</table>');
                    503: 	} else {
1.162     albertel  504: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  505: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  506: 	}
                    507:     }
1.130     albertel  508:     if (scalar(keys(%allparts)) == 0 ) {
1.162     albertel  509: 	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  510:     }
1.114     albertel  511:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  512:     &analyze_footer($request);
1.101     albertel  513:     &Apache::lonhomework::showhash(%overall);
                    514:     return $result;
1.74      albertel  515: }
                    516: 
1.64      albertel  517: sub editxmlmode {
1.145     albertel  518:     my ($request,$file) = @_;
                    519:     my $result;
                    520:     my $problem=&Apache::lonnet::getfile($file);
                    521:     if ($problem eq -1) {
1.146     albertel  522: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    523: 			       " <i>$file</i></b>");
1.145     albertel  524: 	$problem='';
                    525:     }
                    526:     if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    527: 	my $error=&handle_save_or_undo($request,\$problem,
                    528: 				       \$ENV{'form.editxmltext'});
                    529: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    530:     }
1.80      albertel  531:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
1.150     albertel  532:     if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  533: 	&Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    534: 	$ENV{'form.problemmode'}='View';
                    535: 	&renderpage($request,$file);
                    536:     } else {
                    537: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       538: 	my $xml_help = '<table><tr><td>'.
                    539: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    540: 						    "Problem Editing Help").
                    541: 						    '</td><td>'.
                    542:        &Apache::loncommon::help_open_faq(5).
                    543:        &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>';
1.145     albertel  544: 	if ($cols > 80) { $cols = 80; }
                    545: 	if ($cols < 70) { $cols = 70; }
                    546: 	if ($rows < 20) { $rows = 20; }
                    547: 	$result.='<html><body bgcolor="#FFFFFF">
1.64      albertel  548:             <form name="lonhomework" method="POST" action="'.
1.145     albertel  549: 	    $ENV{'request.uri'}.'">
1.146     albertel  550:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
                    551:             <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
                    552:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.64      albertel  553:             <hr />
1.146     albertel  554:             <input type="submit" name="submit" value="'.&mt('Submit Changes').'" />
                    555:             <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />
                    556:             <input type="submit" name="Undo" value="'.&mt('undo').'" />
1.64      albertel  557:             <hr />
1.110     albertel  558:             ' . $xml_help . '
1.64      albertel  559:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.145     albertel  560: 	    &HTML::Entities::encode($problem).'</textarea>
1.64      albertel  561:             </form></body></html>';
1.145     albertel  562: 	$request->print($result);
                    563:     }
                    564:     return '';
1.47      albertel  565: }
                    566: 
1.41      albertel  567: sub renderpage {
1.145     albertel  568:     my ($request,$file) = @_;
1.52      albertel  569: 
1.145     albertel  570:     my (@targets) = &get_target();
1.161     albertel  571:     &Apache::lonhomework::showhashsubset(\%ENV,'form.');
1.145     albertel  572:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
                    573:     foreach my $target (@targets) {
                    574: 	#my $t0 = [&gettimeofday()];
                    575: 	my $problem=&Apache::lonnet::getfile($file);
                    576: 	if ($problem eq -1) {
1.146     albertel  577: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  578: 	    $problem='';
                    579: 	}
1.52      albertel  580: 
1.145     albertel  581: 	my %mystyle;
                    582: 	my $result = '';
                    583: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    584: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    585: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
                    586: 
                    587: 	&Apache::lonxml::debug("Should be parsing now");
                    588: 	$result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    589: 					    &setup_vars($target),%mystyle);
                    590: 	undef($Apache::lonhomework::parsing_a_problem);
                    591: 	#$request->print("Result follows:");
                    592: 	if ($target eq 'modified') {
                    593: 	    &handle_save_or_undo($request,\$problem,\$result);
                    594: 	} else {
                    595: 	    if ($target eq 'analyze') {
                    596: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    597: 		undef(%Apache::lonhomework::analyze);
                    598: 	    }
                    599: 	    #my $td=&tv_interval($t0);
                    600: 	    #if ( $Apache::lonxml::debug) {
                    601: 	    #$result =~ s:</body>::;
                    602: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    603: 	    #}
                    604: 	    $request->print($result);
                    605: 	    $request->rflush();
                    606: 	}
                    607: 	#$request->print(":Result ends");
                    608: 	#my $td=&tv_interval($t0);
1.52      albertel  609:     }
1.41      albertel  610: }
                    611: 
1.42      albertel  612: # with no arg it returns a HTML <option> list of the template titles
                    613: # with one arg it returns the filename associated with the arg passed
                    614: sub get_template_list {
1.145     albertel  615:     my ($namewanted,$extension) = @_;
                    616:     my $result;
                    617:     my @allnames;
                    618:     &Apache::lonxml::debug("Looking for :$extension:");
                    619:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    620: 	my $name=&Apache::lonnet::metadata($file,'title');
                    621: 	if ($namewanted && ($name eq $namewanted)) {
                    622: 	    $result=$file;
                    623: 	    last;
                    624: 	} else {
                    625: 	    if ($name) { push (@allnames, $name); }
                    626: 	}
                    627:     }
                    628:     if (@allnames && !$result) {
1.146     albertel  629: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  630: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  631:     }
1.145     albertel  632:     return $result;
1.42      albertel  633: }
                    634: 
                    635: sub newproblem {
1.65      matthew   636:     my ($request) = @_;
                    637:     my $extension=$request->uri;
                    638:     $extension=~s:^.*\.([\w]+)$:$1:;
                    639:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  640:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  641:     if ($ENV{'form.template'} &&
1.128     albertel  642: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   643: 	use File::Copy;
                    644: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    645: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    646: 	copy($file,$dest);
                    647: 	&renderpage($request,$dest);
1.131     albertel  648:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    649: 	# I don't like hard-coded filenames but for now, this will work.
                    650: 	use File::Copy;
                    651: 	my $templatefilename =
                    652: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    653: 	&Apache::lonxml::debug("$templatefilename");
                    654: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    655: 	copy($templatefilename,$dest);
                    656: 	&renderpage($request,$dest);
1.85      albertel  657:     } else {
1.65      matthew   658: 	my $url=$request->uri;
1.157     albertel  659: 	my $shownurl=$url;
                    660: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   661: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  662: 	my $errormsg;
                    663: 	if ($ENV{'form.newfile'}) {
1.146     albertel  664: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  665: 	}
1.85      albertel  666: 	my $instructions;
1.159     www       667: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1.146     albertel  668: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  669: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  670: 			  'resource' => 'resource',
                    671: 			  'requested' => 'The requested file',
                    672: 			  'not exist' => 'currently does not exist',
                    673: 			  'createnew' => 'To create a new',
                    674: 			  'click' => 'click on the',
                    675: 			  'Create' => 'Create',
                    676: 			  'button' => 'button');
1.65      matthew   677: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       678: $bodytag
1.148     albertel  679: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  680: $errormsg
1.157     albertel  681: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       682: <p>
1.146     albertel  683: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       684: </p>
                    685: <p><form action="$url" method="POST">
1.42      albertel  686: ENDNEWPROBLEM
1.85      albertel  687: 	if (defined($templatelist)) {
                    688: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    689: 	}
1.146     albertel  690: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       691: 	$request->print("</form></p></body>");
1.65      matthew   692:     }
                    693:     return '';
1.42      albertel  694: }
                    695: 
                    696: sub view_or_edit_menu {
1.145     albertel  697:     my ($request) = @_;
                    698:     my $url=$request->uri;
1.147     albertel  699:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  700: 		      'view' => 'View',
                    701: 		      'Edit' => 'edit',
                    702: 		      'or' => 'or',
                    703: 		      'the problem' => 'the problem');
1.145     albertel  704:     $request->print(<<EDITMENU);
1.42      albertel  705: <body bgcolor="#FFFFFF">
                    706: <form action="$url" method="POST">
1.146     albertel  707: $lt{'would'} <input type="submit" name="problemmode" value="&lt{'view'}">
                    708: &lt{'or'} <input type="submit" name="problemmode" value="&lt{'Edit'}">
                    709: &lt{'the problem'}.
1.42      albertel  710: </form>
                    711: </body>
                    712: EDITMENU
                    713: }
                    714: 
1.41      albertel  715: sub handler {
1.145     albertel  716:     #my $t0 = [&gettimeofday()];
                    717:     my $request=$_[0];
                    718:     
                    719:     $Apache::lonxml::debug=$ENV{'user.debug'};
                    720:     if (&setupheader($request)) { return OK; }
                    721:     $ENV{'request.uri'}=$request->uri;
1.41      albertel  722: 
1.145     albertel  723:     #setup permissions
                    724:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    725:     $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    726:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
                    727:     # some times multiple problemmodes are submitted, need to select
                    728:     # the last one
                    729:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    730:     if ( defined($ENV{'form.problemmode'}) &&
                    731: 	 ref($ENV{'form.problemmode'}) ) {
                    732: 	&Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
                    733: 	my $mode=$ENV{'form.problemmode'}->[-1];
                    734: 	undef $ENV{'form.problemmode'};
                    735: 	$ENV{'form.problemmode'}=$mode;
                    736:     }
                    737:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    738:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    739: 
                    740:     #check if we know where we are
                    741:     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    742: 	# if we are browsing we might not be able to know where we are
                    743: 	if ($Apache::lonhomework::browse ne 'F') {
                    744: 	    #should know where we are, so ask
                    745: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    746: 		&Apache::lonnet::cleanenv();
                    747: 	    }
                    748: 	    $request->internal_redirect('/adm/ambiguous'); return;
                    749: 	}
                    750:     }
1.41      albertel  751: 
1.145     albertel  752:     my ($symb) = &Apache::lonxml::whichuser();
                    753:     &Apache::lonxml::debug('symb is '.$symb);
                    754:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.150     albertel  755: 	if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
                    756: 	    $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    757: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  758: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    759: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    760: 	    &Apache::lonxml::debug("Attempt reset");
                    761: 	}
                    762:     }
                    763:     if ($ENV{'request.state'} eq "construct") {
                    764: 	if ( -e $file ) {
                    765: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    766: 						    ['problemmode']);
                    767: 	    if (!(defined $ENV{'form.problemmode'})) {
                    768: 		#first visit to problem in construction space
                    769: 		#&view_or_edit_menu($request);
                    770: 		$ENV{'form.problemmode'}='View';
                    771: 		&renderpage($request,$file);
1.150     albertel  772: 	    } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
1.145     albertel  773: 		&editxmlmode($request,$file);
1.150     albertel  774: 	    } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  775: 		&analyze($request,$file);
                    776: 	    } else {
                    777: 		&renderpage($request,$file);
                    778: 	    }
                    779: 	} else {
                    780: 	    # requested file doesn't exist in contruction space
                    781: 	    &newproblem($request);
                    782: 	}
                    783:     } else {
                    784: 	# just render the page normally outside of construction space
                    785: 	&Apache::lonxml::debug("not construct");
1.52      albertel  786: 	&renderpage($request,$file);
1.41      albertel  787:     }
1.145     albertel  788:     #my $td=&tv_interval($t0);
                    789:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    790:     # &Apache::lonhomework::send_footer($request);
                    791:     # always turn off debug messages
                    792:     $Apache::lonxml::debug=0;
                    793:     return OK;
1.52      albertel  794: 
1.1       albertel  795: }
                    796: 
                    797: 1;
                    798: __END__

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