Annotation of loncom/homework/lonhomework.pm, revision 1.189

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.189   ! albertel    4: # $Id: lonhomework.pm,v 1.188 2004/12/20 12:16:47 foxr 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;
1.179     albertel   55: use Time::HiRes qw( gettimeofday tv_interval );
1.188     foxr       56: use Apache::lonnet();
                     57: 
1.189   ! albertel   58: # FIXME - improve commenting
1.188     foxr       59: 
1.43      albertel   60: 
1.69      harris41   61: BEGIN {
1.145     albertel   62:     &Apache::lonxml::register_insert();
1.43      albertel   63: }
                     64: 
1.188     foxr       65: 
                     66: #
1.189   ! albertel   67: # Decides what targets to render for.
1.188     foxr       68: # Implicit inputs:
                     69: #   Various session environment variables:
1.189   ! albertel   70: #      request.state -  published  - is a /res/ resource
        !            71: #                       uploaded   - is a /uploaded/ resource
        !            72: #                       contruct   - is a /priv/ resource
        !            73: #      form.grade_target - a form parameter requesting a specific target
1.5       albertel   74: sub get_target {
1.189   ! albertel   75:     &Apache::lonxml::debug("request.state = $ENV{'request.state'}");
1.188     foxr       76:     if( defined($ENV{'form.grade_target'})) {
1.189   ! albertel   77: 	&Apache::lonxml::debug("form.grade_target= $ENV{'form.grade_target'}");
1.188     foxr       78:     } else {
1.189   ! albertel   79: 	&Apache::lonxml::debug("form.grade_target <undefined>");
1.188     foxr       80:     }
1.145     albertel   81:     if (($ENV{'request.state'} eq "published") ||
                     82: 	($ENV{'request.state'} eq "uploaded")) {
                     83: 	if ( defined($ENV{'form.grade_target'}  ) 
                     84: 	     && ($ENV{'form.grade_target'} eq 'tex')) {
                     85: 	    return ($ENV{'form.grade_target'});
                     86: 	} elsif ( defined($ENV{'form.grade_target'}  ) 
                     87: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
                     88: 	    return ($ENV{'form.grade_target'});
                     89: 	}
                     90: 
1.62      albertel   91: 	if ( defined($ENV{'form.submitted'}) &&
1.145     albertel   92: 	     ( !defined($ENV{'form.resetdata'})) &&
                     93: 	     ( !defined($ENV{'form.newrandomization'}))) {
                     94: 	    return ('grade', 'web');
                     95: 	} else {
                     96: 	    return ('web');
                     97: 	}
                     98:     } elsif ($ENV{'request.state'} eq "construct") {
                     99: 	if ( defined($ENV{'form.grade_target'}) ) {
                    100: 	    return ($ENV{'form.grade_target'});
                    101: 	}
                    102: 	if ( defined($ENV{'form.preview'})) {
                    103: 	    if ( defined($ENV{'form.submitted'})) {
                    104: 		return ('grade', 'web');
                    105: 	    } else {
                    106: 		return ('web');
                    107: 	    }
                    108: 	} else {
1.150     albertel  109: 	    if ( $ENV{'form.problemmode'} eq &mt('View') ||
                    110: 		 $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
1.145     albertel  111: 		if ( defined($ENV{'form.submitted'}) &&
                    112: 		     (!defined($ENV{'form.resetdata'})) &&
                    113: 		     (!defined($ENV{'form.newrandomization'}))) {
                    114: 		    return ('grade', 'web','answer');
                    115: 		} else {
                    116: 		    return ('web','answer');
                    117: 		}
1.150     albertel  118: 	    } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
1.145     albertel  119: 		if ( $ENV{'form.submitted'} eq 'edit' ) {
1.150     albertel  120: 		    if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  121: 			return ('modified','web','answer');
                    122: 		    } else {
                    123: 			return ('modified','edit');
                    124: 		    }
                    125: 		} else {
                    126: 		    return ('edit');
                    127: 		}
                    128: 	    } else {
                    129: 		return ('web');
                    130: 	    }
                    131: 	}
1.15      albertel  132:     }
1.145     albertel  133:     return ();
1.5       albertel  134: }
                    135: 
1.3       albertel  136: sub setup_vars {
1.145     albertel  137:     my ($target) = @_;
                    138:     return ';'
1.11      albertel  139: #  return ';$external::target='.$target.';';
1.2       albertel  140: }
                    141: 
                    142: sub send_header {
1.145     albertel  143:     my ($request)= @_;
                    144:     $request->print(&Apache::lontexconvert::header());
1.16      albertel  145: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  146: }
                    147: 
1.36      albertel  148: sub createmenu {
1.145     albertel  149:     my ($which,$request)=@_;
                    150:     if ($which eq 'grade') {
                    151: 	$request->print('<script language="JavaScript"> 
1.91      albertel  152:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  153:                  "height=350,width=150,menubar=no");
                    154:           </script>');
1.145     albertel  155:     }
1.36      albertel  156: }
                    157: 
1.2       albertel  158: sub send_footer {
1.145     albertel  159:     my ($request)= @_;
1.16      albertel  160: #  $request->print('</form>');
1.145     albertel  161:     $request->print(&Apache::lontexconvert::footer());
1.2       albertel  162: }
                    163: 
1.52      albertel  164: $Apache::lonxml::browse='';
1.53      www       165: 
1.152     albertel  166: sub check_ip_acc {
                    167:     my ($acc)=@_;
1.154     albertel  168:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  169:     my $allowed=0;
                    170:     my $ip=$ENV{'REMOTE_ADDR'};
                    171:     my $name;
                    172:     foreach my $pattern (split(',',$acc)) {
                    173: 	if ($pattern =~ /\*$/) {
                    174: 	    #35.8.*
                    175: 	    $pattern=~s/\*//;
                    176: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    177: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    178: 	    #35.8.3.[34-56]
                    179: 	    my $low=$2;
                    180: 	    my $high=$3;
                    181: 	    $pattern=$1;
                    182: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    183: 		my $last=(split(/\./,$ip))[3];
                    184: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    185: 	    }
                    186: 	} elsif ($pattern =~ /^\*/) {
                    187: 	    #*.msu.edu
                    188: 	    $pattern=~s/\*//;
                    189: 	    if (!defined($name)) {
                    190: 		use Socket;
                    191: 		my $netaddr=inet_aton($ip);
                    192: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  193: 	    }
1.152     albertel  194: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    195: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    196: 	    #127.0.0.1
                    197: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    198: 	} else {
                    199: 	    #some.name.com
                    200: 	    if (!defined($name)) {
                    201: 		use Socket;
                    202: 		my $netaddr=inet_aton($ip);
                    203: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    204: 	    }
                    205: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    206: 	}
                    207: 	if ($allowed) { last; }
                    208:     }
                    209:     return $allowed;
                    210: }
1.92      bowersj2  211: # JB, 9/24/2002: Any changes in this function may require a change
                    212: # in lonnavmaps::resource::getDateStatus.
1.53      www       213: sub check_access {
1.145     albertel  214:     my ($id) = @_;
                    215:     my $date ='';
                    216:     my $status;
                    217:     my $datemsg = '';
                    218:     my $lastdate = '';
                    219:     my $temp;
                    220:     my $type;
                    221:     my $passed;
                    222: 
                    223:     if ($ENV{'request.state'} eq "construct") {
1.167     albertel  224: 	if ($ENV{'form.problemstate'}) {
1.165     albertel  225: 	    if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.167     albertel  226: 		if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
                    227: 			lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168     albertel  228: 		    return ('CANNOT_ANSWER',
1.174     www       229: 			    &mt('is in this state due to author settings.'));
1.167     albertel  230: 		}
1.165     albertel  231: 	    } else {
                    232: 		return ($ENV{'form.problemstate'},
1.174     www       233: 			&mt('is in this state due to author settings.'));
1.165     albertel  234: 	    }
                    235: 	}
1.145     albertel  236: 	&Apache::lonxml::debug("in construction ignoring dates");
                    237: 	$status='CAN_ANSWER';
1.146     albertel  238: 	$datemsg=&mt('is in under construction');
1.163     albertel  239: #	return ($status,$datemsg);
1.145     albertel  240:     }
                    241: 
                    242:     &Apache::lonxml::debug("checking for part :$id:");
                    243:     &Apache::lonxml::debug("time:".time);
1.152     albertel  244: 
1.163     albertel  245:     if ($ENV{'request.state'} ne "construct") {
                    246: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    247: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    248: 	    $status='INVALID_ACCESS';
                    249: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  250: 	    return($status,$date);
                    251: 	}
1.163     albertel  252: 	
                    253: 	foreach $temp ("opendate","duedate","answerdate") {
                    254: 	    $lastdate = $date;
                    255: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    256: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    257: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    258: 		$date     =~ /^(con_lost|no_such_host)/) {
                    259: 		$status='UNAVAILABLE';
                    260: 		$date=&mt("may open later.");
                    261: 		return($status,$date);
                    262: 	    }
                    263: 	    if ($thistype eq 'date_interval') {
                    264: 		if ($temp eq 'opendate') {
                    265: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    266: 		}
                    267: 		if ($temp eq 'answerdate') {
                    268: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    269: 		}
1.145     albertel  270: 	    }
1.163     albertel  271: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    272: 	    if ($date eq '') {
                    273: 		$date = &mt("an unknown date"); $passed = 0;
                    274: 	    } elsif ($date eq 'con_lost') {
                    275: 		$date = &mt("an indeterminate date"); $passed = 0;
                    276: 	    } else {
                    277: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    278: 		$date = localtime $date;
1.145     albertel  279: 	    }
1.163     albertel  280: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  281: 	}
1.163     albertel  282: 	&Apache::lonxml::debug("have :$type:$passed:");
                    283: 	if ($passed) {
                    284: 	    $status='SHOW_ANSWER';
                    285: 	    $datemsg=$date;
                    286: 	} elsif ($type eq 'opendate') {
                    287: 	    $status='CLOSED';
                    288: 	    $datemsg = &mt("will open on")." $date";
                    289: 	} elsif ($type eq 'duedate') {
                    290: 	    $status='CAN_ANSWER';
                    291: 	    $datemsg = &mt("is due at")." $date";
                    292: 	} elsif ($type eq 'answerdate') {
                    293: 	    $status='CLOSED';
                    294: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  295: 	}
                    296:     }
                    297:     if ($status eq 'CAN_ANSWER') {
                    298: 	#check #tries, and if correct.
                    299: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    300: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    301: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  302: 	if ( $maxtries eq '' && 
                    303: 	     $ENV{'request.state'} ne 'construct') { $maxtries = '2'; } 
                    304: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  305: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    306: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    307: 	    &&
                    308: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    309: 	   ||
                    310: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    311: 	    $status = 'CANNOT_ANSWER';
                    312: 	}
1.121     albertel  313:     }
1.181     albertel  314:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177     albertel  315: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
                    316: 	&Apache::lonxml::debug("looking for interval $interval");
                    317: 	if ($interval) {
                    318: 	    my $first_access=&Apache::lonnet::get_first_access('map');
                    319: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    320: 	    if (!$first_access) {
                    321: 		$status='NOT_YET_VIEWED';
                    322: 		$datemsg=' '.$interval.' seconds';
                    323: 	    } else {
                    324: 		my $newdate=localtime($first_access+$interval);
                    325: 		if (time > ($first_access+$interval)) {
                    326: 		    $status='CLOSED';
                    327: 		    $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
                    328: 		} else {
                    329: 		    $datemsg = &mt("is due at")." $newdate";
                    330: 		}
                    331: 	    }
                    332: 	}
                    333:     }
1.133     albertel  334:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    335:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    336:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    337:   #}
1.54      www       338: 
                    339: 
1.145     albertel  340:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    341:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    342: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    343: 	$status='CAN_ANSWER';
1.146     albertel  344: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  345:     }
1.106     albertel  346: 
1.145     albertel  347:     return ($status,$datemsg);
1.20      albertel  348: }
                    349: 
1.41      albertel  350: sub showhash {
1.145     albertel  351:     my (%hash) = @_;
                    352:     &showhashsubset(\%hash,'.');
                    353:     return '';
1.79      albertel  354: }
                    355: 
1.106     albertel  356: sub showarray {
                    357:     my ($array)=@_;
                    358:     my $string="(";
                    359:     foreach my $elm (@{ $array }) {
                    360: 	if (ref($elm)) {
                    361: 	    if ($elm =~ /ARRAY/ ) {
                    362: 		$string.=&showarray($elm);
                    363: 	    }
                    364: 	} else {
                    365: 	    $string.="$elm,"
                    366: 	}
                    367:     }
                    368:     chop($string);
                    369:     $string.=")";
                    370:     return $string;
                    371: }
                    372: 
1.79      albertel  373: sub showhashsubset {
1.145     albertel  374:     my ($hash,$keyre) = @_;
                    375:     my $resultkey;
                    376:     foreach $resultkey (sort keys %$hash) {
                    377: 	if ($resultkey =~ /$keyre/) {
                    378: 	    if (ref($$hash{$resultkey})) {
                    379: 		if ($$hash{$resultkey} =~ /ARRAY/ ) {
                    380: 		    &Apache::lonxml::debug("$resultkey ---- ".
                    381: 					   &showarray($$hash{$resultkey}));
                    382: 		} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    383: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    384: 		    &showhashsubset($$hash{$resultkey},'.');
                    385: 		} else {
                    386: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    387: 		}
                    388: 	    } else {
                    389: 		&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    390: 	    }
                    391: 	}
                    392:     }
                    393:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    394:     return '';
1.41      albertel  395: }
                    396: 
                    397: sub setuppermissions {
1.145     albertel  398:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    399:     my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    400:     if (! $viewgrades && 
                    401: 	exists($ENV{'request.course.sec'}) && 
                    402: 	$ENV{'request.course.sec'} !~ /^\s*$/) {
                    403: 	$viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
1.127     matthew   404:                                                '/'.$ENV{'request.course.sec'});
1.145     albertel  405:     }
1.188     foxr      406:     $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
1.185     albertel  407:     if ($Apache::lonhomework::browse eq 'F' && 
                    408: 	$ENV{'form.devalidatecourseresdata'} eq 'on') {
                    409: 	my (undef,$courseid) = &Apache::lonxml::whichuser();
                    410: 	&Apache::lonnet::devalidatecourseresdata($ENV{"course.$courseid.num"},
                    411: 					      $ENV{"course.$courseid.domain"});
                    412:     }
1.145     albertel  413:     return ''
1.41      albertel  414: }
                    415: 
                    416: sub setupheader {
1.120     albertel  417:     my $request=$_[0];
                    418:     if ($ENV{'browser.mathml'}) {
1.151     www       419: 	&Apache::loncommon::content_type($request,'text/xml');
1.120     albertel  420:     } else {
1.151     www       421: 	&Apache::loncommon::content_type($request,'text/html');
1.120     albertel  422:     }
                    423:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    424: 	&Apache::loncommon::no_cache($request);
                    425:     }
                    426:     $request->send_http_header;
                    427:     return OK if $request->header_only;
                    428:     return ''
1.41      albertel  429: }
1.35      albertel  430: 
1.47      albertel  431: sub handle_save_or_undo {
1.145     albertel  432:     my ($request,$problem,$result) = @_;
                    433:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    434:     my $filebak =$file.".bak";
                    435:     my $filetmp =$file.".tmp";
                    436:     my $error=0;
1.156     albertel  437: 
                    438:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  439: 
1.150     albertel  440:     if ($ENV{'form.Undo'} eq &mt('undo')) {
1.145     albertel  441: 	my $error=0;
                    442: 	if (!copy($file,$filetmp)) { $error=1; }
                    443: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    444: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    445: 	if (!$error) {
1.171     albertel  446: 	    &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  447: 	} else {
1.171     albertel  448: 	    &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  449: 	    $error=1;
                    450: 	}
1.52      albertel  451:     } else {
1.145     albertel  452: 	my $fs=Apache::File->new(">$filebak");
                    453: 	if (defined($fs)) {
                    454: 	    print $fs $$problem;
1.171     albertel  455: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to").
                    456: 				  " $filebak</b>");
1.145     albertel  457: 	} else {
1.171     albertel  458: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  459: 	    $error=2;
                    460: 	}
                    461: 	my $fh=Apache::File->new(">$file");
                    462: 	if (defined($fh)) {
                    463: 	    print $fh $$result;
1.171     albertel  464: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
                    465: 				  " $file</b>");
1.145     albertel  466: 	} else {
1.171     albertel  467: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
                    468: 				  &mt("Unable to write to")." $file</b></font>");
1.145     albertel  469: 	    $error|=4;
                    470: 	}
1.52      albertel  471:     }
1.145     albertel  472:     return $error;
1.64      albertel  473: }
                    474: 
1.101     albertel  475: sub analyze_header {
                    476:     my ($request) = @_;
1.183     albertel  477:     my $bodytag='<body bgcolor="#ffffff">';
                    478:     if ($ENV{'environment.remote'} eq 'off') {
                    479: 	$bodytag=&Apache::loncommon::bodytag();
                    480:     }
1.109     albertel  481:     my $result.='<html>
1.146     albertel  482:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.183     albertel  483:             '.$bodytag.&Apache::lonxml::message_location().'
1.101     albertel  484:             <form name="lonhomework" method="POST" action="'.
1.179     albertel  485: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
                    486: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  487:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    488:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  489:             <hr />
1.146     albertel  490:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  491:             <hr />
                    492:             </form>';
1.171     albertel  493:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  494:     $request->print($result);
                    495:     $request->rflush();
                    496: }
                    497: 
1.109     albertel  498: sub analyze_footer {
                    499:     my ($request) = @_;
                    500:     my $result='</body></html>';
                    501:     $request->print($result);
                    502:     $request->rflush();
                    503: }
                    504: 
1.74      albertel  505: sub analyze {
1.101     albertel  506:     my ($request,$file) = @_;
                    507:     &Apache::lonxml::debug("Analyze");
                    508:     my $result;
                    509:     my %overall;
                    510:     my %allparts;
                    511:     my $rndseed=$ENV{'form.rndseed'};
                    512:     &analyze_header($request);
1.114     albertel  513:     my %prog_state=
1.146     albertel  514: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    515: 					      &mt('Getting Problem Variants'),
1.175     albertel  516: 					      $ENV{'form.numtoanalyze'},
                    517: 					      'inline',undef);
1.102     albertel  518:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  519: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  520: 						 &mt('last problem'));
1.182     albertel  521: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.101     albertel  522: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    523: 					   ('grade_target' => 'analyze'),
1.130     albertel  524: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  525: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    526: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  527: 	my @parts;
                    528: 	if (defined(@{ $analyze{'parts'} })) {
                    529: 	    @parts=@{ $analyze{'parts'} };
                    530: 	}
1.101     albertel  531: 	foreach my $part (@parts) {
                    532: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  533: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    534: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    535: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  536: 		push( @{ $overall{$part.'.answer'} },
                    537: 		      [@{ $analyze{$part.'.answer'} }]);
                    538: 	    }
                    539: 	}
                    540:     }
1.114     albertel  541:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  542: 					  &mt('Analyzing Results'));
1.175     albertel  543:     $request->print('<hr />'.&mt('List of possible answers').': ');
1.134     albertel  544:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  545: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  546: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.184     albertel  547: 	    $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
1.130     albertel  548: 	    my %frequency;
1.109     albertel  549: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  550: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  551: 	    }
1.184     albertel  552: 	    $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
1.132     albertel  553: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    554: 		$request->print('<tr><td align="right">'.
                    555: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  556: 				'</td><td>('.$frequency{$answer}.
                    557: 				')</td></tr>');
1.109     albertel  558: 	    }
                    559: 	    $request->print('</table>');
                    560: 	} else {
1.162     albertel  561: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  562: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  563: 	}
                    564:     }
1.130     albertel  565:     if (scalar(keys(%allparts)) == 0 ) {
1.162     albertel  566: 	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  567:     }
1.114     albertel  568:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  569:     &analyze_footer($request);
1.101     albertel  570:     &Apache::lonhomework::showhash(%overall);
                    571:     return $result;
1.74      albertel  572: }
                    573: 
1.64      albertel  574: sub editxmlmode {
1.145     albertel  575:     my ($request,$file) = @_;
                    576:     my $result;
                    577:     my $problem=&Apache::lonnet::getfile($file);
                    578:     if ($problem eq -1) {
1.146     albertel  579: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    580: 			       " <i>$file</i></b>");
1.145     albertel  581: 	$problem='';
                    582:     }
                    583:     if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    584: 	my $error=&handle_save_or_undo($request,\$problem,
                    585: 				       \$ENV{'form.editxmltext'});
                    586: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    587:     }
1.80      albertel  588:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
1.150     albertel  589:     if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  590: 	&Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    591: 	$ENV{'form.problemmode'}='View';
                    592: 	&renderpage($request,$file);
                    593:     } else {
                    594: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       595: 	my $xml_help = '<table><tr><td>'.
                    596: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    597: 						    "Problem Editing Help").
                    598: 						    '</td><td>'.
1.178     albertel  599:        &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
                    600:                 '</td></tr></table>';
1.145     albertel  601: 	if ($cols > 80) { $cols = 80; }
                    602: 	if ($cols < 70) { $cols = 70; }
                    603: 	if ($rows < 20) { $rows = 20; }
1.183     albertel  604: 	my $bodytag='<body bgcolor="#ffffff">';
                    605: 	if ($ENV{'environment.remote'} eq 'off') {
                    606: 	    $bodytag=&Apache::loncommon::bodytag();
                    607: 	}
                    608: 	$result.='<html>'.$bodytag.&Apache::lonxml::message_location().'
1.64      albertel  609:             <form name="lonhomework" method="POST" action="'.
1.179     albertel  610: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
                    611: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  612:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170     matthew   613:             <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    614:             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.64      albertel  615:             <hr />
1.170     matthew   616:             <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                    617:             <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
                    618:             <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64      albertel  619:             <hr />
1.110     albertel  620:             ' . $xml_help . '
1.64      albertel  621:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.172     albertel  622: 	    &HTML::Entities::encode($problem,'<>&"').'</textarea>
1.64      albertel  623:             </form></body></html>';
1.171     albertel  624: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  625: 	$request->print($result);
                    626:     }
                    627:     return '';
1.47      albertel  628: }
1.189   ! albertel  629: 
1.188     foxr      630: #
                    631: #    Render the page in whatever target desired.
                    632: #
1.41      albertel  633: sub renderpage {
1.145     albertel  634:     my ($request,$file) = @_;
1.52      albertel  635: 
1.145     albertel  636:     my (@targets) = &get_target();
1.161     albertel  637:     &Apache::lonhomework::showhashsubset(\%ENV,'form.');
1.145     albertel  638:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171     albertel  639:     my $overall_result;
1.145     albertel  640:     foreach my $target (@targets) {
1.183     albertel  641: 	# FIXME need to do something intelligent when a problem goes
                    642:         # from viewable to not viewable due to map conditions
                    643: 	#&setuppermissions();
                    644: 	#if (   $Apache::lonhomework::browse ne '2'
                    645: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                    646: 	#    $request->print(" You most likely shouldn't see me.");
                    647: 	#}
1.145     albertel  648: 	#my $t0 = [&gettimeofday()];
                    649: 	my $problem=&Apache::lonnet::getfile($file);
                    650: 	if ($problem eq -1) {
1.146     albertel  651: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  652: 	    $problem='';
                    653: 	}
1.52      albertel  654: 
1.145     albertel  655: 	my %mystyle;
                    656: 	my $result = '';
                    657: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    658: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    659: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
                    660: 
                    661: 	&Apache::lonxml::debug("Should be parsing now");
                    662: 	$result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    663: 					    &setup_vars($target),%mystyle);
                    664: 	undef($Apache::lonhomework::parsing_a_problem);
                    665: 	#$request->print("Result follows:");
                    666: 	if ($target eq 'modified') {
                    667: 	    &handle_save_or_undo($request,\$problem,\$result);
                    668: 	} else {
                    669: 	    if ($target eq 'analyze') {
                    670: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    671: 		undef(%Apache::lonhomework::analyze);
                    672: 	    }
                    673: 	    #my $td=&tv_interval($t0);
                    674: 	    #if ( $Apache::lonxml::debug) {
                    675: 	    #$result =~ s:</body>::;
                    676: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    677: 	    #}
1.171     albertel  678: #	    $request->print($result);
                    679: 	    $overall_result.=$result;
                    680: #	    $request->rflush();
1.145     albertel  681: 	}
                    682: 	#$request->print(":Result ends");
                    683: 	#my $td=&tv_interval($t0);
1.52      albertel  684:     }
1.171     albertel  685:     &Apache::lonxml::add_messages(\$overall_result);
                    686:     $request->print($overall_result);   
                    687:     $request->rflush();   
1.41      albertel  688: }
                    689: 
1.42      albertel  690: # with no arg it returns a HTML <option> list of the template titles
                    691: # with one arg it returns the filename associated with the arg passed
                    692: sub get_template_list {
1.145     albertel  693:     my ($namewanted,$extension) = @_;
                    694:     my $result;
                    695:     my @allnames;
                    696:     &Apache::lonxml::debug("Looking for :$extension:");
                    697:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    698: 	my $name=&Apache::lonnet::metadata($file,'title');
                    699: 	if ($namewanted && ($name eq $namewanted)) {
                    700: 	    $result=$file;
                    701: 	    last;
                    702: 	} else {
                    703: 	    if ($name) { push (@allnames, $name); }
                    704: 	}
                    705:     }
                    706:     if (@allnames && !$result) {
1.146     albertel  707: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  708: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  709:     }
1.145     albertel  710:     return $result;
1.42      albertel  711: }
                    712: 
                    713: sub newproblem {
1.65      matthew   714:     my ($request) = @_;
                    715:     my $extension=$request->uri;
                    716:     $extension=~s:^.*\.([\w]+)$:$1:;
                    717:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  718:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  719:     if ($ENV{'form.template'} &&
1.128     albertel  720: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   721: 	use File::Copy;
                    722: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    723: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    724: 	copy($file,$dest);
                    725: 	&renderpage($request,$dest);
1.131     albertel  726:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    727: 	# I don't like hard-coded filenames but for now, this will work.
                    728: 	use File::Copy;
                    729: 	my $templatefilename =
                    730: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    731: 	&Apache::lonxml::debug("$templatefilename");
                    732: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    733: 	copy($templatefilename,$dest);
                    734: 	&renderpage($request,$dest);
1.85      albertel  735:     } else {
1.176     albertel  736: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                    737: 	my $shownurl=$url;	
1.157     albertel  738: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   739: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  740: 	my $errormsg;
                    741: 	if ($ENV{'form.newfile'}) {
1.146     albertel  742: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  743: 	}
1.85      albertel  744: 	my $instructions;
1.186     albertel  745: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
                    746: 					($ENV{'environment.remote'} ne 'off'));
1.146     albertel  747: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  748: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  749: 			  'resource' => 'resource',
                    750: 			  'requested' => 'The requested file',
                    751: 			  'not exist' => 'currently does not exist',
                    752: 			  'createnew' => 'To create a new',
                    753: 			  'click' => 'click on the',
                    754: 			  'Create' => 'Create',
                    755: 			  'button' => 'button');
1.65      matthew   756: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       757: $bodytag
1.148     albertel  758: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  759: $errormsg
1.157     albertel  760: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       761: <p>
1.146     albertel  762: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       763: </p>
                    764: <p><form action="$url" method="POST">
1.42      albertel  765: ENDNEWPROBLEM
1.85      albertel  766: 	if (defined($templatelist)) {
                    767: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    768: 	}
1.146     albertel  769: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       770: 	$request->print("</form></p></body>");
1.65      matthew   771:     }
                    772:     return '';
1.42      albertel  773: }
                    774: 
                    775: sub view_or_edit_menu {
1.145     albertel  776:     my ($request) = @_;
1.176     albertel  777:     my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.147     albertel  778:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  779: 		      'view' => 'View',
                    780: 		      'Edit' => 'edit',
                    781: 		      'or' => 'or',
                    782: 		      'the problem' => 'the problem');
1.145     albertel  783:     $request->print(<<EDITMENU);
1.42      albertel  784: <body bgcolor="#FFFFFF">
                    785: <form action="$url" method="POST">
1.170     matthew   786: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
                    787: &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
1.146     albertel  788: &lt{'the problem'}.
1.42      albertel  789: </form>
                    790: </body>
                    791: EDITMENU
                    792: }
                    793: 
1.41      albertel  794: sub handler {
1.145     albertel  795:     #my $t0 = [&gettimeofday()];
                    796:     my $request=$_[0];
                    797:     
                    798:     $Apache::lonxml::debug=$ENV{'user.debug'};
                    799:     $ENV{'request.uri'}=$request->uri;
1.180     albertel  800:     &setuppermissions();
1.145     albertel  801:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
                    802:     # some times multiple problemmodes are submitted, need to select
                    803:     # the last one
                    804:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    805:     if ( defined($ENV{'form.problemmode'}) &&
                    806: 	 ref($ENV{'form.problemmode'}) ) {
                    807: 	&Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
                    808: 	my $mode=$ENV{'form.problemmode'}->[-1];
                    809: 	undef $ENV{'form.problemmode'};
                    810: 	$ENV{'form.problemmode'}=$mode;
                    811:     }
                    812:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    813:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    814: 
                    815:     #check if we know where we are
                    816:     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    817: 	# if we are browsing we might not be able to know where we are
1.173     albertel  818: 	if ($Apache::lonhomework::browse ne 'F' && 
                    819: 	    $ENV{'request.state'} ne "construct") {
1.145     albertel  820: 	    #should know where we are, so ask
                    821: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    822: 		&Apache::lonnet::cleanenv();
                    823: 	    }
                    824: 	    $request->internal_redirect('/adm/ambiguous'); return;
                    825: 	}
                    826:     }
1.187     albertel  827:     if (&setupheader($request)) { return OK; }
1.41      albertel  828: 
1.145     albertel  829:     my ($symb) = &Apache::lonxml::whichuser();
                    830:     &Apache::lonxml::debug('symb is '.$symb);
                    831:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.150     albertel  832: 	if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
                    833: 	    $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    834: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  835: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    836: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    837: 	    &Apache::lonxml::debug("Attempt reset");
                    838: 	}
                    839:     }
                    840:     if ($ENV{'request.state'} eq "construct") {
                    841: 	if ( -e $file ) {
                    842: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    843: 						    ['problemmode']);
                    844: 	    if (!(defined $ENV{'form.problemmode'})) {
                    845: 		#first visit to problem in construction space
                    846: 		#&view_or_edit_menu($request);
                    847: 		$ENV{'form.problemmode'}='View';
                    848: 		&renderpage($request,$file);
1.150     albertel  849: 	    } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
1.145     albertel  850: 		&editxmlmode($request,$file);
1.150     albertel  851: 	    } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  852: 		&analyze($request,$file);
                    853: 	    } else {
                    854: 		&renderpage($request,$file);
                    855: 	    }
                    856: 	} else {
                    857: 	    # requested file doesn't exist in contruction space
                    858: 	    &newproblem($request);
                    859: 	}
                    860:     } else {
                    861: 	# just render the page normally outside of construction space
                    862: 	&Apache::lonxml::debug("not construct");
1.52      albertel  863: 	&renderpage($request,$file);
1.41      albertel  864:     }
1.145     albertel  865:     #my $td=&tv_interval($t0);
                    866:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    867:     # &Apache::lonhomework::send_footer($request);
                    868:     # always turn off debug messages
                    869:     $Apache::lonxml::debug=0;
                    870:     return OK;
1.52      albertel  871: 
1.1       albertel  872: }
                    873: 
                    874: 1;
                    875: __END__

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