Annotation of loncom/homework/lonhomework.pm, revision 1.177

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.177   ! albertel    4: # $Id: lonhomework.pm,v 1.176 2004/05/26 22:45:57 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();
1.169     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;
1.47      albertel   55: #use Time::HiRes qw( gettimeofday tv_interval );
1.43      albertel   56: 
1.69      harris41   57: BEGIN {
1.145     albertel   58:     &Apache::lonxml::register_insert();
1.43      albertel   59: }
                     60: 
1.5       albertel   61: sub get_target {
1.145     albertel   62:     if (($ENV{'request.state'} eq "published") ||
                     63: 	($ENV{'request.state'} eq "uploaded")) {
                     64: 	if ( defined($ENV{'form.grade_target'}  ) 
                     65: 	     && ($ENV{'form.grade_target'} eq 'tex')) {
                     66: 	    return ($ENV{'form.grade_target'});
                     67: 	} elsif ( defined($ENV{'form.grade_target'}  ) 
                     68: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
                     69: 	    return ($ENV{'form.grade_target'});
                     70: 	}
                     71: 
1.62      albertel   72: 	if ( defined($ENV{'form.submitted'}) &&
1.145     albertel   73: 	     ( !defined($ENV{'form.resetdata'})) &&
                     74: 	     ( !defined($ENV{'form.newrandomization'}))) {
                     75: 	    return ('grade', 'web');
                     76: 	} else {
                     77: 	    return ('web');
                     78: 	}
                     79:     } elsif ($ENV{'request.state'} eq "construct") {
                     80: 	if ( defined($ENV{'form.grade_target'}) ) {
                     81: 	    return ($ENV{'form.grade_target'});
                     82: 	}
                     83: 	if ( defined($ENV{'form.preview'})) {
                     84: 	    if ( defined($ENV{'form.submitted'})) {
                     85: 		return ('grade', 'web');
                     86: 	    } else {
                     87: 		return ('web');
                     88: 	    }
                     89: 	} else {
1.150     albertel   90: 	    if ( $ENV{'form.problemmode'} eq &mt('View') ||
                     91: 		 $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
1.145     albertel   92: 		if ( defined($ENV{'form.submitted'}) &&
                     93: 		     (!defined($ENV{'form.resetdata'})) &&
                     94: 		     (!defined($ENV{'form.newrandomization'}))) {
                     95: 		    return ('grade', 'web','answer');
                     96: 		} else {
                     97: 		    return ('web','answer');
                     98: 		}
1.150     albertel   99: 	    } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
1.145     albertel  100: 		if ( $ENV{'form.submitted'} eq 'edit' ) {
1.150     albertel  101: 		    if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  102: 			return ('modified','web','answer');
                    103: 		    } else {
                    104: 			return ('modified','edit');
                    105: 		    }
                    106: 		} else {
                    107: 		    return ('edit');
                    108: 		}
                    109: 	    } else {
                    110: 		return ('web');
                    111: 	    }
                    112: 	}
1.15      albertel  113:     }
1.145     albertel  114:     return ();
1.5       albertel  115: }
                    116: 
1.3       albertel  117: sub setup_vars {
1.145     albertel  118:     my ($target) = @_;
                    119:     return ';'
1.11      albertel  120: #  return ';$external::target='.$target.';';
1.2       albertel  121: }
                    122: 
                    123: sub send_header {
1.145     albertel  124:     my ($request)= @_;
                    125:     $request->print(&Apache::lontexconvert::header());
1.16      albertel  126: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  127: }
                    128: 
1.36      albertel  129: sub createmenu {
1.145     albertel  130:     my ($which,$request)=@_;
                    131:     if ($which eq 'grade') {
                    132: 	$request->print('<script language="JavaScript"> 
1.91      albertel  133:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  134:                  "height=350,width=150,menubar=no");
                    135:           </script>');
1.145     albertel  136:     }
1.36      albertel  137: }
                    138: 
1.2       albertel  139: sub send_footer {
1.145     albertel  140:     my ($request)= @_;
1.16      albertel  141: #  $request->print('</form>');
1.145     albertel  142:     $request->print(&Apache::lontexconvert::footer());
1.2       albertel  143: }
                    144: 
1.52      albertel  145: $Apache::lonxml::browse='';
1.53      www       146: 
1.152     albertel  147: sub check_ip_acc {
                    148:     my ($acc)=@_;
1.154     albertel  149:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  150:     my $allowed=0;
                    151:     my $ip=$ENV{'REMOTE_ADDR'};
                    152:     my $name;
                    153:     foreach my $pattern (split(',',$acc)) {
                    154: 	if ($pattern =~ /\*$/) {
                    155: 	    #35.8.*
                    156: 	    $pattern=~s/\*//;
                    157: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    158: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    159: 	    #35.8.3.[34-56]
                    160: 	    my $low=$2;
                    161: 	    my $high=$3;
                    162: 	    $pattern=$1;
                    163: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    164: 		my $last=(split(/\./,$ip))[3];
                    165: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    166: 	    }
                    167: 	} elsif ($pattern =~ /^\*/) {
                    168: 	    #*.msu.edu
                    169: 	    $pattern=~s/\*//;
                    170: 	    if (!defined($name)) {
                    171: 		use Socket;
                    172: 		my $netaddr=inet_aton($ip);
                    173: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  174: 	    }
1.152     albertel  175: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    176: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    177: 	    #127.0.0.1
                    178: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    179: 	} else {
                    180: 	    #some.name.com
                    181: 	    if (!defined($name)) {
                    182: 		use Socket;
                    183: 		my $netaddr=inet_aton($ip);
                    184: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    185: 	    }
                    186: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    187: 	}
                    188: 	if ($allowed) { last; }
                    189:     }
                    190:     return $allowed;
                    191: }
1.92      bowersj2  192: # JB, 9/24/2002: Any changes in this function may require a change
                    193: # in lonnavmaps::resource::getDateStatus.
1.53      www       194: sub check_access {
1.145     albertel  195:     my ($id) = @_;
                    196:     my $date ='';
                    197:     my $status;
                    198:     my $datemsg = '';
                    199:     my $lastdate = '';
                    200:     my $temp;
                    201:     my $type;
                    202:     my $passed;
                    203: 
                    204:     if ($ENV{'request.state'} eq "construct") {
1.167     albertel  205: 	if ($ENV{'form.problemstate'}) {
1.165     albertel  206: 	    if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.167     albertel  207: 		if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
                    208: 			lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168     albertel  209: 		    return ('CANNOT_ANSWER',
1.174     www       210: 			    &mt('is in this state due to author settings.'));
1.167     albertel  211: 		}
1.165     albertel  212: 	    } else {
                    213: 		return ($ENV{'form.problemstate'},
1.174     www       214: 			&mt('is in this state due to author settings.'));
1.165     albertel  215: 	    }
                    216: 	}
1.145     albertel  217: 	&Apache::lonxml::debug("in construction ignoring dates");
                    218: 	$status='CAN_ANSWER';
1.146     albertel  219: 	$datemsg=&mt('is in under construction');
1.163     albertel  220: #	return ($status,$datemsg);
1.145     albertel  221:     }
                    222: 
                    223:     &Apache::lonxml::debug("checking for part :$id:");
                    224:     &Apache::lonxml::debug("time:".time);
1.152     albertel  225: 
1.163     albertel  226:     if ($ENV{'request.state'} ne "construct") {
                    227: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    228: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    229: 	    $status='INVALID_ACCESS';
                    230: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  231: 	    return($status,$date);
                    232: 	}
1.163     albertel  233: 	
                    234: 	foreach $temp ("opendate","duedate","answerdate") {
                    235: 	    $lastdate = $date;
                    236: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    237: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    238: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    239: 		$date     =~ /^(con_lost|no_such_host)/) {
                    240: 		$status='UNAVAILABLE';
                    241: 		$date=&mt("may open later.");
                    242: 		return($status,$date);
                    243: 	    }
                    244: 	    if ($thistype eq 'date_interval') {
                    245: 		if ($temp eq 'opendate') {
                    246: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    247: 		}
                    248: 		if ($temp eq 'answerdate') {
                    249: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    250: 		}
1.145     albertel  251: 	    }
1.163     albertel  252: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    253: 	    if ($date eq '') {
                    254: 		$date = &mt("an unknown date"); $passed = 0;
                    255: 	    } elsif ($date eq 'con_lost') {
                    256: 		$date = &mt("an indeterminate date"); $passed = 0;
                    257: 	    } else {
                    258: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    259: 		$date = localtime $date;
1.145     albertel  260: 	    }
1.163     albertel  261: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  262: 	}
1.163     albertel  263: 	&Apache::lonxml::debug("have :$type:$passed:");
                    264: 	if ($passed) {
                    265: 	    $status='SHOW_ANSWER';
                    266: 	    $datemsg=$date;
                    267: 	} elsif ($type eq 'opendate') {
                    268: 	    $status='CLOSED';
                    269: 	    $datemsg = &mt("will open on")." $date";
                    270: 	} elsif ($type eq 'duedate') {
                    271: 	    $status='CAN_ANSWER';
                    272: 	    $datemsg = &mt("is due at")." $date";
                    273: 	} elsif ($type eq 'answerdate') {
                    274: 	    $status='CLOSED';
                    275: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  276: 	}
                    277:     }
                    278:     if ($status eq 'CAN_ANSWER') {
                    279: 	#check #tries, and if correct.
                    280: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    281: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    282: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  283: 	if ( $maxtries eq '' && 
                    284: 	     $ENV{'request.state'} ne 'construct') { $maxtries = '2'; } 
                    285: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  286: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    287: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    288: 	    &&
                    289: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    290: 	   ||
                    291: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    292: 	    $status = 'CANNOT_ANSWER';
                    293: 	}
1.121     albertel  294:     }
1.177   ! albertel  295:     if ($status eq 'CAN_ANSWER') {
        !           296: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
        !           297: 	&Apache::lonxml::debug("looking for interval $interval");
        !           298: 	if ($interval) {
        !           299: 	    my $first_access=&Apache::lonnet::get_first_access('map');
        !           300: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
        !           301: 	    if (!$first_access) {
        !           302: 		$status='NOT_YET_VIEWED';
        !           303: 		$datemsg=' '.$interval.' seconds';
        !           304: 	    } else {
        !           305: 		my $newdate=localtime($first_access+$interval);
        !           306: 		if (time > ($first_access+$interval)) {
        !           307: 		    $status='CLOSED';
        !           308: 		    $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
        !           309: 		} else {
        !           310: 		    $datemsg = &mt("is due at")." $newdate";
        !           311: 		}
        !           312: 	    }
        !           313: 	}
        !           314:     }
1.133     albertel  315:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    316:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    317:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    318:   #}
1.54      www       319: 
                    320: 
1.145     albertel  321:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    322:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    323: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    324: 	$status='CAN_ANSWER';
1.146     albertel  325: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  326:     }
1.106     albertel  327: 
1.145     albertel  328:     return ($status,$datemsg);
1.20      albertel  329: }
                    330: 
1.41      albertel  331: sub showhash {
1.145     albertel  332:     my (%hash) = @_;
                    333:     &showhashsubset(\%hash,'.');
                    334:     return '';
1.79      albertel  335: }
                    336: 
1.106     albertel  337: sub showarray {
                    338:     my ($array)=@_;
                    339:     my $string="(";
                    340:     foreach my $elm (@{ $array }) {
                    341: 	if (ref($elm)) {
                    342: 	    if ($elm =~ /ARRAY/ ) {
                    343: 		$string.=&showarray($elm);
                    344: 	    }
                    345: 	} else {
                    346: 	    $string.="$elm,"
                    347: 	}
                    348:     }
                    349:     chop($string);
                    350:     $string.=")";
                    351:     return $string;
                    352: }
                    353: 
1.79      albertel  354: sub showhashsubset {
1.145     albertel  355:     my ($hash,$keyre) = @_;
                    356:     my $resultkey;
                    357:     foreach $resultkey (sort keys %$hash) {
                    358: 	if ($resultkey =~ /$keyre/) {
                    359: 	    if (ref($$hash{$resultkey})) {
                    360: 		if ($$hash{$resultkey} =~ /ARRAY/ ) {
                    361: 		    &Apache::lonxml::debug("$resultkey ---- ".
                    362: 					   &showarray($$hash{$resultkey}));
                    363: 		} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    364: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    365: 		    &showhashsubset($$hash{$resultkey},'.');
                    366: 		} else {
                    367: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    368: 		}
                    369: 	    } else {
                    370: 		&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    371: 	    }
                    372: 	}
                    373:     }
                    374:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    375:     return '';
1.41      albertel  376: }
                    377: 
                    378: sub setuppermissions {
1.145     albertel  379:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    380:     my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    381:     if (! $viewgrades && 
                    382: 	exists($ENV{'request.course.sec'}) && 
                    383: 	$ENV{'request.course.sec'} !~ /^\s*$/) {
                    384: 	$viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
1.127     matthew   385:                                                '/'.$ENV{'request.course.sec'});
1.145     albertel  386:     }
                    387:     $Apache::lonhomework::viewgrades = $viewgrades;
                    388:     return ''
1.41      albertel  389: }
                    390: 
                    391: sub setupheader {
1.120     albertel  392:     my $request=$_[0];
                    393:     if ($ENV{'browser.mathml'}) {
1.151     www       394: 	&Apache::loncommon::content_type($request,'text/xml');
1.120     albertel  395:     } else {
1.151     www       396: 	&Apache::loncommon::content_type($request,'text/html');
1.120     albertel  397:     }
                    398:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    399: 	&Apache::loncommon::no_cache($request);
                    400:     }
                    401:     $request->send_http_header;
                    402:     return OK if $request->header_only;
                    403:     return ''
1.41      albertel  404: }
1.35      albertel  405: 
1.47      albertel  406: sub handle_save_or_undo {
1.145     albertel  407:     my ($request,$problem,$result) = @_;
                    408:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    409:     my $filebak =$file.".bak";
                    410:     my $filetmp =$file.".tmp";
                    411:     my $error=0;
1.156     albertel  412: 
                    413:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  414: 
1.150     albertel  415:     if ($ENV{'form.Undo'} eq &mt('undo')) {
1.145     albertel  416: 	my $error=0;
                    417: 	if (!copy($file,$filetmp)) { $error=1; }
                    418: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    419: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    420: 	if (!$error) {
1.171     albertel  421: 	    &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  422: 	} else {
1.171     albertel  423: 	    &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  424: 	    $error=1;
                    425: 	}
1.52      albertel  426:     } else {
1.145     albertel  427: 	my $fs=Apache::File->new(">$filebak");
                    428: 	if (defined($fs)) {
                    429: 	    print $fs $$problem;
1.171     albertel  430: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to").
                    431: 				  " $filebak</b>");
1.145     albertel  432: 	} else {
1.171     albertel  433: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  434: 	    $error=2;
                    435: 	}
                    436: 	my $fh=Apache::File->new(">$file");
                    437: 	if (defined($fh)) {
                    438: 	    print $fh $$result;
1.171     albertel  439: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
                    440: 				  " $file</b>");
1.145     albertel  441: 	} else {
1.171     albertel  442: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
                    443: 				  &mt("Unable to write to")." $file</b></font>");
1.145     albertel  444: 	    $error|=4;
                    445: 	}
1.52      albertel  446:     }
1.145     albertel  447:     return $error;
1.64      albertel  448: }
                    449: 
1.101     albertel  450: sub analyze_header {
                    451:     my ($request) = @_;
1.109     albertel  452:     my $result.='<html>
1.146     albertel  453:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.171     albertel  454:             <body bgcolor="#FFFFFF">'.&Apache::lonxml::message_location().'
1.101     albertel  455:             <form name="lonhomework" method="POST" action="'.
1.176     albertel  456: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">
1.146     albertel  457:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    458:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  459:             <hr />
1.146     albertel  460:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  461:             <hr />
                    462:             </form>';
1.171     albertel  463:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  464:     $request->print($result);
                    465:     $request->rflush();
                    466: }
                    467: 
1.109     albertel  468: sub analyze_footer {
                    469:     my ($request) = @_;
                    470:     my $result='</body></html>';
                    471:     $request->print($result);
                    472:     $request->rflush();
                    473: }
                    474: 
1.74      albertel  475: sub analyze {
1.101     albertel  476:     my ($request,$file) = @_;
                    477:     &Apache::lonxml::debug("Analyze");
                    478:     my $result;
                    479:     my %overall;
                    480:     my %allparts;
                    481:     my $rndseed=$ENV{'form.rndseed'};
                    482:     &analyze_header($request);
1.114     albertel  483:     my %prog_state=
1.146     albertel  484: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    485: 					      &mt('Getting Problem Variants'),
1.175     albertel  486: 					      $ENV{'form.numtoanalyze'},
                    487: 					      'inline',undef);
1.102     albertel  488:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  489: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  490: 						 &mt('last problem'));
1.101     albertel  491: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    492: 					   ('grade_target' => 'analyze'),
1.130     albertel  493: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  494: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    495: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  496: 	my @parts;
                    497: 	if (defined(@{ $analyze{'parts'} })) {
                    498: 	    @parts=@{ $analyze{'parts'} };
                    499: 	}
1.101     albertel  500: 	foreach my $part (@parts) {
                    501: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  502: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    503: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    504: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  505: 		push( @{ $overall{$part.'.answer'} },
                    506: 		      [@{ $analyze{$part.'.answer'} }]);
                    507: 	    }
                    508: 	}
                    509:     }
1.114     albertel  510:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  511: 					  &mt('Analyzing Results'));
1.175     albertel  512:     $request->print('<hr />'.&mt('List of possible answers').': ');
1.134     albertel  513:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  514: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  515: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.146     albertel  516: 	    $request->print('<table><tr><td colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</td></tr>');
1.130     albertel  517: 	    my %frequency;
1.109     albertel  518: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  519: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  520: 	    }
1.146     albertel  521: 	    $request->print('<tr><td colspan="'.($num_cols).'">'.&mt('Answer').'</td><td>'.&mt('Frequency').'</td></tr>');
1.132     albertel  522: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    523: 		$request->print('<tr><td align="right">'.
                    524: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  525: 				'</td><td>('.$frequency{$answer}.
                    526: 				')</td></tr>');
1.109     albertel  527: 	    }
                    528: 	    $request->print('</table>');
                    529: 	} else {
1.162     albertel  530: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  531: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  532: 	}
                    533:     }
1.130     albertel  534:     if (scalar(keys(%allparts)) == 0 ) {
1.162     albertel  535: 	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  536:     }
1.114     albertel  537:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  538:     &analyze_footer($request);
1.101     albertel  539:     &Apache::lonhomework::showhash(%overall);
                    540:     return $result;
1.74      albertel  541: }
                    542: 
1.64      albertel  543: sub editxmlmode {
1.145     albertel  544:     my ($request,$file) = @_;
                    545:     my $result;
                    546:     my $problem=&Apache::lonnet::getfile($file);
                    547:     if ($problem eq -1) {
1.146     albertel  548: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    549: 			       " <i>$file</i></b>");
1.145     albertel  550: 	$problem='';
                    551:     }
                    552:     if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    553: 	my $error=&handle_save_or_undo($request,\$problem,
                    554: 				       \$ENV{'form.editxmltext'});
                    555: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    556:     }
1.80      albertel  557:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
1.150     albertel  558:     if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  559: 	&Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    560: 	$ENV{'form.problemmode'}='View';
                    561: 	&renderpage($request,$file);
                    562:     } else {
                    563: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       564: 	my $xml_help = '<table><tr><td>'.
                    565: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    566: 						    "Problem Editing Help").
                    567: 						    '</td><td>'.
                    568:        &Apache::loncommon::help_open_faq(5).
                    569:        &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>';
1.145     albertel  570: 	if ($cols > 80) { $cols = 80; }
                    571: 	if ($cols < 70) { $cols = 70; }
                    572: 	if ($rows < 20) { $rows = 20; }
1.171     albertel  573: 	$result.='<html><body bgcolor="#FFFFFF">'.
                    574: 	    &Apache::lonxml::message_location().'
1.64      albertel  575:             <form name="lonhomework" method="POST" action="'.
1.176     albertel  576: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">
1.146     albertel  577:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170     matthew   578:             <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    579:             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.64      albertel  580:             <hr />
1.170     matthew   581:             <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                    582:             <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
                    583:             <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64      albertel  584:             <hr />
1.110     albertel  585:             ' . $xml_help . '
1.64      albertel  586:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.172     albertel  587: 	    &HTML::Entities::encode($problem,'<>&"').'</textarea>
1.64      albertel  588:             </form></body></html>';
1.171     albertel  589: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  590: 	$request->print($result);
                    591:     }
                    592:     return '';
1.47      albertel  593: }
                    594: 
1.41      albertel  595: sub renderpage {
1.145     albertel  596:     my ($request,$file) = @_;
1.52      albertel  597: 
1.145     albertel  598:     my (@targets) = &get_target();
1.161     albertel  599:     &Apache::lonhomework::showhashsubset(\%ENV,'form.');
1.145     albertel  600:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171     albertel  601:     my $overall_result;
1.145     albertel  602:     foreach my $target (@targets) {
                    603: 	#my $t0 = [&gettimeofday()];
                    604: 	my $problem=&Apache::lonnet::getfile($file);
                    605: 	if ($problem eq -1) {
1.146     albertel  606: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  607: 	    $problem='';
                    608: 	}
1.52      albertel  609: 
1.145     albertel  610: 	my %mystyle;
                    611: 	my $result = '';
                    612: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    613: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    614: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
                    615: 
                    616: 	&Apache::lonxml::debug("Should be parsing now");
                    617: 	$result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    618: 					    &setup_vars($target),%mystyle);
                    619: 	undef($Apache::lonhomework::parsing_a_problem);
                    620: 	#$request->print("Result follows:");
                    621: 	if ($target eq 'modified') {
                    622: 	    &handle_save_or_undo($request,\$problem,\$result);
                    623: 	} else {
                    624: 	    if ($target eq 'analyze') {
                    625: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    626: 		undef(%Apache::lonhomework::analyze);
                    627: 	    }
                    628: 	    #my $td=&tv_interval($t0);
                    629: 	    #if ( $Apache::lonxml::debug) {
                    630: 	    #$result =~ s:</body>::;
                    631: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    632: 	    #}
1.171     albertel  633: #	    $request->print($result);
                    634: 	    $overall_result.=$result;
                    635: #	    $request->rflush();
1.145     albertel  636: 	}
                    637: 	#$request->print(":Result ends");
                    638: 	#my $td=&tv_interval($t0);
1.52      albertel  639:     }
1.171     albertel  640:     &Apache::lonxml::add_messages(\$overall_result);
                    641:     $request->print($overall_result);   
                    642:     $request->rflush();   
1.41      albertel  643: }
                    644: 
1.42      albertel  645: # with no arg it returns a HTML <option> list of the template titles
                    646: # with one arg it returns the filename associated with the arg passed
                    647: sub get_template_list {
1.145     albertel  648:     my ($namewanted,$extension) = @_;
                    649:     my $result;
                    650:     my @allnames;
                    651:     &Apache::lonxml::debug("Looking for :$extension:");
                    652:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    653: 	my $name=&Apache::lonnet::metadata($file,'title');
                    654: 	if ($namewanted && ($name eq $namewanted)) {
                    655: 	    $result=$file;
                    656: 	    last;
                    657: 	} else {
                    658: 	    if ($name) { push (@allnames, $name); }
                    659: 	}
                    660:     }
                    661:     if (@allnames && !$result) {
1.146     albertel  662: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  663: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  664:     }
1.145     albertel  665:     return $result;
1.42      albertel  666: }
                    667: 
                    668: sub newproblem {
1.65      matthew   669:     my ($request) = @_;
                    670:     my $extension=$request->uri;
                    671:     $extension=~s:^.*\.([\w]+)$:$1:;
                    672:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  673:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  674:     if ($ENV{'form.template'} &&
1.128     albertel  675: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   676: 	use File::Copy;
                    677: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    678: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    679: 	copy($file,$dest);
                    680: 	&renderpage($request,$dest);
1.131     albertel  681:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    682: 	# I don't like hard-coded filenames but for now, this will work.
                    683: 	use File::Copy;
                    684: 	my $templatefilename =
                    685: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    686: 	&Apache::lonxml::debug("$templatefilename");
                    687: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    688: 	copy($templatefilename,$dest);
                    689: 	&renderpage($request,$dest);
1.85      albertel  690:     } else {
1.176     albertel  691: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                    692: 	my $shownurl=$url;	
1.157     albertel  693: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   694: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  695: 	my $errormsg;
                    696: 	if ($ENV{'form.newfile'}) {
1.146     albertel  697: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  698: 	}
1.85      albertel  699: 	my $instructions;
1.159     www       700: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1.146     albertel  701: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  702: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  703: 			  'resource' => 'resource',
                    704: 			  'requested' => 'The requested file',
                    705: 			  'not exist' => 'currently does not exist',
                    706: 			  'createnew' => 'To create a new',
                    707: 			  'click' => 'click on the',
                    708: 			  'Create' => 'Create',
                    709: 			  'button' => 'button');
1.65      matthew   710: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       711: $bodytag
1.148     albertel  712: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  713: $errormsg
1.157     albertel  714: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       715: <p>
1.146     albertel  716: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       717: </p>
                    718: <p><form action="$url" method="POST">
1.42      albertel  719: ENDNEWPROBLEM
1.85      albertel  720: 	if (defined($templatelist)) {
                    721: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    722: 	}
1.146     albertel  723: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       724: 	$request->print("</form></p></body>");
1.65      matthew   725:     }
                    726:     return '';
1.42      albertel  727: }
                    728: 
                    729: sub view_or_edit_menu {
1.145     albertel  730:     my ($request) = @_;
1.176     albertel  731:     my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.147     albertel  732:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  733: 		      'view' => 'View',
                    734: 		      'Edit' => 'edit',
                    735: 		      'or' => 'or',
                    736: 		      'the problem' => 'the problem');
1.145     albertel  737:     $request->print(<<EDITMENU);
1.42      albertel  738: <body bgcolor="#FFFFFF">
                    739: <form action="$url" method="POST">
1.170     matthew   740: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
                    741: &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
1.146     albertel  742: &lt{'the problem'}.
1.42      albertel  743: </form>
                    744: </body>
                    745: EDITMENU
                    746: }
                    747: 
1.41      albertel  748: sub handler {
1.145     albertel  749:     #my $t0 = [&gettimeofday()];
                    750:     my $request=$_[0];
                    751:     
                    752:     $Apache::lonxml::debug=$ENV{'user.debug'};
                    753:     if (&setupheader($request)) { return OK; }
                    754:     $ENV{'request.uri'}=$request->uri;
1.41      albertel  755: 
1.145     albertel  756:     #setup permissions
                    757:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    758:     $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    759:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
                    760:     # some times multiple problemmodes are submitted, need to select
                    761:     # the last one
                    762:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    763:     if ( defined($ENV{'form.problemmode'}) &&
                    764: 	 ref($ENV{'form.problemmode'}) ) {
                    765: 	&Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
                    766: 	my $mode=$ENV{'form.problemmode'}->[-1];
                    767: 	undef $ENV{'form.problemmode'};
                    768: 	$ENV{'form.problemmode'}=$mode;
                    769:     }
                    770:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    771:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    772: 
                    773:     #check if we know where we are
                    774:     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    775: 	# if we are browsing we might not be able to know where we are
1.173     albertel  776: 	if ($Apache::lonhomework::browse ne 'F' && 
                    777: 	    $ENV{'request.state'} ne "construct") {
1.145     albertel  778: 	    #should know where we are, so ask
                    779: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    780: 		&Apache::lonnet::cleanenv();
                    781: 	    }
                    782: 	    $request->internal_redirect('/adm/ambiguous'); return;
                    783: 	}
                    784:     }
1.41      albertel  785: 
1.145     albertel  786:     my ($symb) = &Apache::lonxml::whichuser();
                    787:     &Apache::lonxml::debug('symb is '.$symb);
                    788:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.150     albertel  789: 	if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
                    790: 	    $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    791: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  792: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    793: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    794: 	    &Apache::lonxml::debug("Attempt reset");
                    795: 	}
                    796:     }
                    797:     if ($ENV{'request.state'} eq "construct") {
                    798: 	if ( -e $file ) {
                    799: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    800: 						    ['problemmode']);
                    801: 	    if (!(defined $ENV{'form.problemmode'})) {
                    802: 		#first visit to problem in construction space
                    803: 		#&view_or_edit_menu($request);
                    804: 		$ENV{'form.problemmode'}='View';
                    805: 		&renderpage($request,$file);
1.150     albertel  806: 	    } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
1.145     albertel  807: 		&editxmlmode($request,$file);
1.150     albertel  808: 	    } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  809: 		&analyze($request,$file);
                    810: 	    } else {
                    811: 		&renderpage($request,$file);
                    812: 	    }
                    813: 	} else {
                    814: 	    # requested file doesn't exist in contruction space
                    815: 	    &newproblem($request);
                    816: 	}
                    817:     } else {
                    818: 	# just render the page normally outside of construction space
                    819: 	&Apache::lonxml::debug("not construct");
1.52      albertel  820: 	&renderpage($request,$file);
1.41      albertel  821:     }
1.145     albertel  822:     #my $td=&tv_interval($t0);
                    823:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    824:     # &Apache::lonhomework::send_footer($request);
                    825:     # always turn off debug messages
                    826:     $Apache::lonxml::debug=0;
                    827:     return OK;
1.52      albertel  828: 
1.1       albertel  829: }
                    830: 
                    831: 1;
                    832: __END__

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