Annotation of loncom/homework/lonhomework.pm, revision 1.188

1.63      albertel    1: # The LearningOnline Network with CAPA
1.52      albertel    2: # The LON-CAPA Homework handler
1.63      albertel    3: #
1.188   ! foxr        4: # $Id: lonhomework.pm,v 1.187 2004/12/17 22:30:30 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;
1.179     albertel   55: use Time::HiRes qw( gettimeofday tv_interval );
1.188   ! foxr       56: use Apache::lonnet();
        !            57: #
        !            58: # FIXME!!!!!!!
        !            59: #   Be nice if someone 
        !            60: #    - Took credit/blame for this module.
        !            61: #    - At least commented the purpose of each major
        !            62: #      sub
        !            63: #    - Even better commented the major blocks.
        !            64: #
        !            65: #  I'll have a go at it for what I need.
        !            66: #     ?'s- mean maybe this is right.
        !            67: #          The number of ?'s represents the rough level
        !            68: #          of doubt I have about rightness, with ??? representing
        !            69: #          uncertainty based on the first blush interpretation.
        !            70: #          ?? - I have some code to back up this interpretation.
        !            71: #          ?  - I"m pretty sure I understand the code that backs up this
        !            72: #               interpretation.
        !            73: #         ???? - Absolutely clueless.
        !            74: #          .  - I'm pretty sure the interpretation is correct.
        !            75: #  RF.
        !            76: 
        !            77: 
        !            78: # 'Exported' Variables:
        !            79: 
        !            80: #   viewgrades is 'F' if users are not allowed to view the grades.. T otherwise.
        !            81: 
        !            82: $Apache::lonhomework::viewgrades = 'F';		# By default cannot.
        !            83: 
        !            84: #  Internal variables.
        !            85: 
        !            86: my $DEBUG=0;			# set nonzero to enable debugging.
1.43      albertel   87: 
1.69      harris41   88: BEGIN {
1.145     albertel   89:     &Apache::lonxml::register_insert();
1.43      albertel   90: }
                     91: 
1.188   ! foxr       92: #
        !            93: #   Issue debug log messages.  
        !            94: # Parameters:
        !            95: #    The log message to issue.
        !            96: # Implicit Inputs:
        !            97: #    DEBUG   - If non zero the message is issued, otherwise not.
        !            98: #
        !            99: sub Debug {
        !           100:     my ($message) = @_;
        !           101: 
        !           102:     if($DEBUG) {
        !           103: 	my @call_context = caller(1);
        !           104: 	my $prefix = "$call_context[3]:$call_context[2]:: ";
        !           105: 	&Apache::lonnet::logthis($prefix.$message);
        !           106:     }
        !           107: }
        !           108: 
        !           109: #
        !           110: #   I believe this sub defines how to render the
        !           111: #   problem based on the context of the rendering?
        !           112: # Implicit inputs:
        !           113: #   Various session environment variables:
        !           114: #      request.state - State of the resource actually ??
        !           115: #                       published  - Examining in resource space.
        !           116: #                       uploaded   - Not sure how this happens?????
        !           117: #                       contruct   - Rendering in construction space for viewing.
        !           118: #      form.grade_target - 
1.5       albertel  119: sub get_target {
1.188   ! foxr      120:     &Debug("request.state = $ENV{'request.state'}");
        !           121:     if( defined($ENV{'form.grade_target'})) {
        !           122: 	&Debug("form.grade_target = $ENV{'form.grade_target'}");
        !           123:     } else {
        !           124: 	&Debug("form.grade_target <undefined>");
        !           125:     }
1.145     albertel  126:     if (($ENV{'request.state'} eq "published") ||
                    127: 	($ENV{'request.state'} eq "uploaded")) {
                    128: 	if ( defined($ENV{'form.grade_target'}  ) 
                    129: 	     && ($ENV{'form.grade_target'} eq 'tex')) {
                    130: 	    return ($ENV{'form.grade_target'});
                    131: 	} elsif ( defined($ENV{'form.grade_target'}  ) 
                    132: 		  && ($Apache::lonhomework::viewgrades eq 'F' )) {
                    133: 	    return ($ENV{'form.grade_target'});
                    134: 	}
                    135: 
1.62      albertel  136: 	if ( defined($ENV{'form.submitted'}) &&
1.145     albertel  137: 	     ( !defined($ENV{'form.resetdata'})) &&
                    138: 	     ( !defined($ENV{'form.newrandomization'}))) {
                    139: 	    return ('grade', 'web');
                    140: 	} else {
                    141: 	    return ('web');
                    142: 	}
                    143:     } elsif ($ENV{'request.state'} eq "construct") {
                    144: 	if ( defined($ENV{'form.grade_target'}) ) {
                    145: 	    return ($ENV{'form.grade_target'});
                    146: 	}
                    147: 	if ( defined($ENV{'form.preview'})) {
                    148: 	    if ( defined($ENV{'form.submitted'})) {
                    149: 		return ('grade', 'web');
                    150: 	    } else {
                    151: 		return ('web');
                    152: 	    }
                    153: 	} else {
1.150     albertel  154: 	    if ( $ENV{'form.problemmode'} eq &mt('View') ||
                    155: 		 $ENV{'form.problemmode'} eq &mt('Discard Edits and View')) {
1.145     albertel  156: 		if ( defined($ENV{'form.submitted'}) &&
                    157: 		     (!defined($ENV{'form.resetdata'})) &&
                    158: 		     (!defined($ENV{'form.newrandomization'}))) {
                    159: 		    return ('grade', 'web','answer');
                    160: 		} else {
                    161: 		    return ('web','answer');
                    162: 		}
1.150     albertel  163: 	    } elsif ( $ENV{'form.problemmode'} eq &mt('Edit') ) {
1.145     albertel  164: 		if ( $ENV{'form.submitted'} eq 'edit' ) {
1.150     albertel  165: 		    if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  166: 			return ('modified','web','answer');
                    167: 		    } else {
                    168: 			return ('modified','edit');
                    169: 		    }
                    170: 		} else {
                    171: 		    return ('edit');
                    172: 		}
                    173: 	    } else {
                    174: 		return ('web');
                    175: 	    }
                    176: 	}
1.15      albertel  177:     }
1.145     albertel  178:     return ();
1.5       albertel  179: }
                    180: 
1.3       albertel  181: sub setup_vars {
1.145     albertel  182:     my ($target) = @_;
                    183:     return ';'
1.11      albertel  184: #  return ';$external::target='.$target.';';
1.2       albertel  185: }
                    186: 
                    187: sub send_header {
1.145     albertel  188:     my ($request)= @_;
                    189:     $request->print(&Apache::lontexconvert::header());
1.16      albertel  190: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
1.2       albertel  191: }
                    192: 
1.36      albertel  193: sub createmenu {
1.145     albertel  194:     my ($which,$request)=@_;
                    195:     if ($which eq 'grade') {
                    196: 	$request->print('<script language="JavaScript"> 
1.91      albertel  197:           hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52      albertel  198:                  "height=350,width=150,menubar=no");
                    199:           </script>');
1.145     albertel  200:     }
1.36      albertel  201: }
                    202: 
1.2       albertel  203: sub send_footer {
1.145     albertel  204:     my ($request)= @_;
1.16      albertel  205: #  $request->print('</form>');
1.145     albertel  206:     $request->print(&Apache::lontexconvert::footer());
1.2       albertel  207: }
                    208: 
1.52      albertel  209: $Apache::lonxml::browse='';
1.53      www       210: 
1.152     albertel  211: sub check_ip_acc {
                    212:     my ($acc)=@_;
1.154     albertel  213:     if (!defined($acc) || $acc =~ /^\s*$/) { return 1; }
1.152     albertel  214:     my $allowed=0;
                    215:     my $ip=$ENV{'REMOTE_ADDR'};
                    216:     my $name;
                    217:     foreach my $pattern (split(',',$acc)) {
                    218: 	if ($pattern =~ /\*$/) {
                    219: 	    #35.8.*
                    220: 	    $pattern=~s/\*//;
                    221: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    222: 	} elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {    
                    223: 	    #35.8.3.[34-56]
                    224: 	    my $low=$2;
                    225: 	    my $high=$3;
                    226: 	    $pattern=$1;
                    227: 	    if ($ip =~ /^\Q$pattern\E/) { 
                    228: 		my $last=(split(/\./,$ip))[3];
                    229: 		if ($last <=$high && $last >=$low) { $allowed=1; }
                    230: 	    }
                    231: 	} elsif ($pattern =~ /^\*/) {
                    232: 	    #*.msu.edu
                    233: 	    $pattern=~s/\*//;
                    234: 	    if (!defined($name)) {
                    235: 		use Socket;
                    236: 		my $netaddr=inet_aton($ip);
                    237: 		($name)=gethostbyaddr($netaddr,AF_INET);
1.158     albertel  238: 	    }
1.152     albertel  239: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    240: 	} elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
                    241: 	    #127.0.0.1
                    242: 	    if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
                    243: 	} else {
                    244: 	    #some.name.com
                    245: 	    if (!defined($name)) {
                    246: 		use Socket;
                    247: 		my $netaddr=inet_aton($ip);
                    248: 		($name)=gethostbyaddr($netaddr,AF_INET);
                    249: 	    }
                    250: 	    if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
                    251: 	}
                    252: 	if ($allowed) { last; }
                    253:     }
                    254:     return $allowed;
                    255: }
1.92      bowersj2  256: # JB, 9/24/2002: Any changes in this function may require a change
                    257: # in lonnavmaps::resource::getDateStatus.
1.53      www       258: sub check_access {
1.145     albertel  259:     my ($id) = @_;
                    260:     my $date ='';
                    261:     my $status;
                    262:     my $datemsg = '';
                    263:     my $lastdate = '';
                    264:     my $temp;
                    265:     my $type;
                    266:     my $passed;
                    267: 
                    268:     if ($ENV{'request.state'} eq "construct") {
1.167     albertel  269: 	if ($ENV{'form.problemstate'}) {
1.165     albertel  270: 	    if ($ENV{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
1.167     albertel  271: 		if ( ! ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
                    272: 			lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168     albertel  273: 		    return ('CANNOT_ANSWER',
1.174     www       274: 			    &mt('is in this state due to author settings.'));
1.167     albertel  275: 		}
1.165     albertel  276: 	    } else {
                    277: 		return ($ENV{'form.problemstate'},
1.174     www       278: 			&mt('is in this state due to author settings.'));
1.165     albertel  279: 	    }
                    280: 	}
1.145     albertel  281: 	&Apache::lonxml::debug("in construction ignoring dates");
                    282: 	$status='CAN_ANSWER';
1.146     albertel  283: 	$datemsg=&mt('is in under construction');
1.163     albertel  284: #	return ($status,$datemsg);
1.145     albertel  285:     }
                    286: 
                    287:     &Apache::lonxml::debug("checking for part :$id:");
                    288:     &Apache::lonxml::debug("time:".time);
1.152     albertel  289: 
1.163     albertel  290:     if ($ENV{'request.state'} ne "construct") {
                    291: 	my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
                    292: 	if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
                    293: 	    $status='INVALID_ACCESS';
                    294: 	    $date=&mt("can not be accessed from your location.");
1.145     albertel  295: 	    return($status,$date);
                    296: 	}
1.163     albertel  297: 	
                    298: 	foreach $temp ("opendate","duedate","answerdate") {
                    299: 	    $lastdate = $date;
                    300: 	    $date = &Apache::lonnet::EXT("resource.$id.$temp");
                    301: 	    my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
                    302: 	    if ($thistype =~ /^(con_lost|no_such_host)/ ||
                    303: 		$date     =~ /^(con_lost|no_such_host)/) {
                    304: 		$status='UNAVAILABLE';
                    305: 		$date=&mt("may open later.");
                    306: 		return($status,$date);
                    307: 	    }
                    308: 	    if ($thistype eq 'date_interval') {
                    309: 		if ($temp eq 'opendate') {
                    310: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
                    311: 		}
                    312: 		if ($temp eq 'answerdate') {
                    313: 		    $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
                    314: 		}
1.145     albertel  315: 	    }
1.163     albertel  316: 	    &Apache::lonxml::debug("found :$date: for :$temp:");
                    317: 	    if ($date eq '') {
                    318: 		$date = &mt("an unknown date"); $passed = 0;
                    319: 	    } elsif ($date eq 'con_lost') {
                    320: 		$date = &mt("an indeterminate date"); $passed = 0;
                    321: 	    } else {
                    322: 		if (time < $date) { $passed = 0; } else { $passed = 1; }
                    323: 		$date = localtime $date;
1.145     albertel  324: 	    }
1.163     albertel  325: 	    if (!$passed) { $type=$temp; last; }
1.145     albertel  326: 	}
1.163     albertel  327: 	&Apache::lonxml::debug("have :$type:$passed:");
                    328: 	if ($passed) {
                    329: 	    $status='SHOW_ANSWER';
                    330: 	    $datemsg=$date;
                    331: 	} elsif ($type eq 'opendate') {
                    332: 	    $status='CLOSED';
                    333: 	    $datemsg = &mt("will open on")." $date";
                    334: 	} elsif ($type eq 'duedate') {
                    335: 	    $status='CAN_ANSWER';
                    336: 	    $datemsg = &mt("is due at")." $date";
                    337: 	} elsif ($type eq 'answerdate') {
                    338: 	    $status='CLOSED';
                    339: 	    $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145     albertel  340: 	}
                    341:     }
                    342:     if ($status eq 'CAN_ANSWER') {
                    343: 	#check #tries, and if correct.
                    344: 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
                    345: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    346: 	if ( $tries eq '' ) { $tries = '0'; }
1.164     albertel  347: 	if ( $maxtries eq '' && 
                    348: 	     $ENV{'request.state'} ne 'construct') { $maxtries = '2'; } 
                    349: 	if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145     albertel  350: 	# if (correct and show prob status) or excused then CANNOT_ANSWER
                    351: 	if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
                    352: 	    &&
                    353: 	    lc($Apache::lonhomework::problemstatus) ne 'no')
                    354: 	   ||
                    355: 	   $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
                    356: 	    $status = 'CANNOT_ANSWER';
                    357: 	}
1.121     albertel  358:     }
1.181     albertel  359:     if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177     albertel  360: 	my $interval=&Apache::lonnet::EXT("resource.$id.interval");
                    361: 	&Apache::lonxml::debug("looking for interval $interval");
                    362: 	if ($interval) {
                    363: 	    my $first_access=&Apache::lonnet::get_first_access('map');
                    364: 	    &Apache::lonxml::debug("looking for accesstime $first_access");
                    365: 	    if (!$first_access) {
                    366: 		$status='NOT_YET_VIEWED';
                    367: 		$datemsg=' '.$interval.' seconds';
                    368: 	    } else {
                    369: 		my $newdate=localtime($first_access+$interval);
                    370: 		if (time > ($first_access+$interval)) {
                    371: 		    $status='CLOSED';
                    372: 		    $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
                    373: 		} else {
                    374: 		    $datemsg = &mt("is due at")." $newdate";
                    375: 		}
                    376: 	    }
                    377: 	}
                    378:     }
1.133     albertel  379:   #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
                    380:   #    (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
                    381:   #    return ('UNCHECKEDOUT','needs to be checked out');
                    382:   #}
1.54      www       383: 
                    384: 
1.145     albertel  385:     &Apache::lonxml::debug("sending back :$status:$datemsg:");
                    386:     if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
                    387: 	&Apache::lonxml::debug("should be allowed to browse a resource when closed");
                    388: 	$status='CAN_ANSWER';
1.146     albertel  389: 	$datemsg=&mt('is closed but you are allowed to view it');
1.145     albertel  390:     }
1.106     albertel  391: 
1.145     albertel  392:     return ($status,$datemsg);
1.20      albertel  393: }
                    394: 
1.41      albertel  395: sub showhash {
1.145     albertel  396:     my (%hash) = @_;
                    397:     &showhashsubset(\%hash,'.');
                    398:     return '';
1.79      albertel  399: }
                    400: 
1.106     albertel  401: sub showarray {
                    402:     my ($array)=@_;
                    403:     my $string="(";
                    404:     foreach my $elm (@{ $array }) {
                    405: 	if (ref($elm)) {
                    406: 	    if ($elm =~ /ARRAY/ ) {
                    407: 		$string.=&showarray($elm);
                    408: 	    }
                    409: 	} else {
                    410: 	    $string.="$elm,"
                    411: 	}
                    412:     }
                    413:     chop($string);
                    414:     $string.=")";
                    415:     return $string;
                    416: }
                    417: 
1.79      albertel  418: sub showhashsubset {
1.145     albertel  419:     my ($hash,$keyre) = @_;
                    420:     my $resultkey;
                    421:     foreach $resultkey (sort keys %$hash) {
                    422: 	if ($resultkey =~ /$keyre/) {
                    423: 	    if (ref($$hash{$resultkey})) {
                    424: 		if ($$hash{$resultkey} =~ /ARRAY/ ) {
                    425: 		    &Apache::lonxml::debug("$resultkey ---- ".
                    426: 					   &showarray($$hash{$resultkey}));
                    427: 		} elsif ($$hash{$resultkey} =~ /HASH/ ) {
                    428: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    429: 		    &showhashsubset($$hash{$resultkey},'.');
                    430: 		} else {
                    431: 		    &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    432: 		}
                    433: 	    } else {
                    434: 		&Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
                    435: 	    }
                    436: 	}
                    437:     }
                    438:     &Apache::lonxml::debug("\n<br />restored values^</br>\n");
                    439:     return '';
1.41      albertel  440: }
                    441: 
                    442: sub setuppermissions {
1.145     albertel  443:     $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
                    444:     my $viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                    445:     if (! $viewgrades && 
                    446: 	exists($ENV{'request.course.sec'}) && 
                    447: 	$ENV{'request.course.sec'} !~ /^\s*$/) {
                    448: 	$viewgrades = &Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.
1.127     matthew   449:                                                '/'.$ENV{'request.course.sec'});
1.145     albertel  450:     }
1.188   ! foxr      451:     $Apache::lonhomework::viewgrades = $viewgrades; # File global variable...dirt.
1.185     albertel  452:     if ($Apache::lonhomework::browse eq 'F' && 
                    453: 	$ENV{'form.devalidatecourseresdata'} eq 'on') {
                    454: 	my (undef,$courseid) = &Apache::lonxml::whichuser();
                    455: 	&Apache::lonnet::devalidatecourseresdata($ENV{"course.$courseid.num"},
                    456: 					      $ENV{"course.$courseid.domain"});
                    457:     }
1.145     albertel  458:     return ''
1.41      albertel  459: }
                    460: 
                    461: sub setupheader {
1.120     albertel  462:     my $request=$_[0];
                    463:     if ($ENV{'browser.mathml'}) {
1.151     www       464: 	&Apache::loncommon::content_type($request,'text/xml');
1.120     albertel  465:     } else {
1.151     www       466: 	&Apache::loncommon::content_type($request,'text/html');
1.120     albertel  467:     }
                    468:     if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
                    469: 	&Apache::loncommon::no_cache($request);
                    470:     }
                    471:     $request->send_http_header;
                    472:     return OK if $request->header_only;
                    473:     return ''
1.41      albertel  474: }
1.35      albertel  475: 
1.47      albertel  476: sub handle_save_or_undo {
1.145     albertel  477:     my ($request,$problem,$result) = @_;
                    478:     my $file    = &Apache::lonnet::filelocation("",$request->uri);
                    479:     my $filebak =$file.".bak";
                    480:     my $filetmp =$file.".tmp";
                    481:     my $error=0;
1.156     albertel  482: 
                    483:     &Apache::lonnet::correct_line_ends($result);
1.52      albertel  484: 
1.150     albertel  485:     if ($ENV{'form.Undo'} eq &mt('undo')) {
1.145     albertel  486: 	my $error=0;
                    487: 	if (!copy($file,$filetmp)) { $error=1; }
                    488: 	if ((!$error) && (!copy($filebak,$file))) { $error=1; }
                    489: 	if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
                    490: 	if (!$error) {
1.171     albertel  491: 	    &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145     albertel  492: 	} else {
1.171     albertel  493: 	    &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  494: 	    $error=1;
                    495: 	}
1.52      albertel  496:     } else {
1.145     albertel  497: 	my $fs=Apache::File->new(">$filebak");
                    498: 	if (defined($fs)) {
                    499: 	    print $fs $$problem;
1.171     albertel  500: 	    &Apache::lonxml::info("<b>".&mt("Making Backup to").
                    501: 				  " $filebak</b>");
1.145     albertel  502: 	} else {
1.171     albertel  503: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145     albertel  504: 	    $error=2;
                    505: 	}
                    506: 	my $fh=Apache::File->new(">$file");
                    507: 	if (defined($fh)) {
                    508: 	    print $fh $$result;
1.171     albertel  509: 	    &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
                    510: 				  " $file</b>");
1.145     albertel  511: 	} else {
1.171     albertel  512: 	    &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
                    513: 				  &mt("Unable to write to")." $file</b></font>");
1.145     albertel  514: 	    $error|=4;
                    515: 	}
1.52      albertel  516:     }
1.145     albertel  517:     return $error;
1.64      albertel  518: }
                    519: 
1.101     albertel  520: sub analyze_header {
                    521:     my ($request) = @_;
1.183     albertel  522:     my $bodytag='<body bgcolor="#ffffff">';
                    523:     if ($ENV{'environment.remote'} eq 'off') {
                    524: 	$bodytag=&Apache::loncommon::bodytag();
                    525:     }
1.109     albertel  526:     my $result.='<html>
1.146     albertel  527:             <head><title>'.&mt("Analyzing a problem").'</title></head>
1.183     albertel  528:             '.$bodytag.&Apache::lonxml::message_location().'
1.101     albertel  529:             <form name="lonhomework" method="POST" action="'.
1.179     albertel  530: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
                    531: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  532:             <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
                    533:             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101     albertel  534:             <hr />
1.146     albertel  535:             <input type="submit" name="submit" value="'.&mt("View").'" />
1.101     albertel  536:             <hr />
                    537:             </form>';
1.171     albertel  538:     &Apache::lonxml::add_messages(\$result);
1.101     albertel  539:     $request->print($result);
                    540:     $request->rflush();
                    541: }
                    542: 
1.109     albertel  543: sub analyze_footer {
                    544:     my ($request) = @_;
                    545:     my $result='</body></html>';
                    546:     $request->print($result);
                    547:     $request->rflush();
                    548: }
                    549: 
1.74      albertel  550: sub analyze {
1.101     albertel  551:     my ($request,$file) = @_;
                    552:     &Apache::lonxml::debug("Analyze");
                    553:     my $result;
                    554:     my %overall;
                    555:     my %allparts;
                    556:     my $rndseed=$ENV{'form.rndseed'};
                    557:     &analyze_header($request);
1.114     albertel  558:     my %prog_state=
1.146     albertel  559: 	&Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
                    560: 					      &mt('Getting Problem Variants'),
1.175     albertel  561: 					      $ENV{'form.numtoanalyze'},
                    562: 					      'inline',undef);
1.102     albertel  563:     for(my $i=1;$i<$ENV{'form.numtoanalyze'}+1;$i++) {
1.114     albertel  564: 	&Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146     albertel  565: 						 &mt('last problem'));
1.182     albertel  566: 	if (&Apache::loncommon::connection_aborted($request)) { return; }
1.101     albertel  567: 	my $subresult=&Apache::lonnet::ssi($request->uri,
                    568: 					   ('grade_target' => 'analyze'),
1.130     albertel  569: 					   ('rndseed' => $i+$rndseed));
1.101     albertel  570: 	(my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
                    571: 	my %analyze=&Apache::lonnet::str2hash($subresult);
1.114     albertel  572: 	my @parts;
                    573: 	if (defined(@{ $analyze{'parts'} })) {
                    574: 	    @parts=@{ $analyze{'parts'} };
                    575: 	}
1.101     albertel  576: 	foreach my $part (@parts) {
                    577: 	    if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109     albertel  578: 	    if ($analyze{$part.'.type'} eq 'numericalresponse'	||
                    579: 		$analyze{$part.'.type'} eq 'stringresponse'	||
                    580: 		$analyze{$part.'.type'} eq 'formularesponse'   ) {
1.101     albertel  581: 		push( @{ $overall{$part.'.answer'} },
                    582: 		      [@{ $analyze{$part.'.answer'} }]);
                    583: 	    }
                    584: 	}
                    585:     }
1.114     albertel  586:     &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146     albertel  587: 					  &mt('Analyzing Results'));
1.175     albertel  588:     $request->print('<hr />'.&mt('List of possible answers').': ');
1.134     albertel  589:     foreach my $part (sort(keys(%allparts))) {
1.109     albertel  590: 	if (defined(@{ $overall{$part.'.answer'} })) {
1.132     albertel  591: 	    my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.184     albertel  592: 	    $request->print('<table><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
1.130     albertel  593: 	    my %frequency;
1.109     albertel  594: 	    foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132     albertel  595: 		$frequency{join("\0",@{ $answer })}++;
1.130     albertel  596: 	    }
1.184     albertel  597: 	    $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'</th></tr>');
1.132     albertel  598: 	    foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
                    599: 		$request->print('<tr><td align="right">'.
                    600: 				join('</td><td align="right">',split("\0",$answer)).
1.130     albertel  601: 				'</td><td>('.$frequency{$answer}.
                    602: 				')</td></tr>');
1.109     albertel  603: 	    }
                    604: 	    $request->print('</table>');
                    605: 	} else {
1.162     albertel  606: 	    $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146     albertel  607: 			    &mt('is not analyzable at this time').'</p>');
1.101     albertel  608: 	}
                    609:     }
1.130     albertel  610:     if (scalar(keys(%allparts)) == 0 ) {
1.162     albertel  611: 	$request->print('<p>'.&mt('Found no analyzable respones in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130     albertel  612:     }
1.114     albertel  613:     &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109     albertel  614:     &analyze_footer($request);
1.101     albertel  615:     &Apache::lonhomework::showhash(%overall);
                    616:     return $result;
1.74      albertel  617: }
                    618: 
1.64      albertel  619: sub editxmlmode {
1.145     albertel  620:     my ($request,$file) = @_;
                    621:     my $result;
                    622:     my $problem=&Apache::lonnet::getfile($file);
                    623:     if ($problem eq -1) {
1.146     albertel  624: 	&Apache::lonxml::error("<b> ".&mt('Unable to find').
                    625: 			       " <i>$file</i></b>");
1.145     albertel  626: 	$problem='';
                    627:     }
                    628:     if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
                    629: 	my $error=&handle_save_or_undo($request,\$problem,
                    630: 				       \$ENV{'form.editxmltext'});
                    631: 	if (!$error) { $problem=&Apache::lonnet::getfile($file); }
                    632:     }
1.80      albertel  633:     &Apache::lonhomework::showhashsubset(\%ENV,'^form');
1.150     albertel  634:     if ( $ENV{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145     albertel  635: 	&Apache::lonhomework::showhashsubset(\%ENV,'^form');
                    636: 	$ENV{'form.problemmode'}='View';
                    637: 	&renderpage($request,$file);
                    638:     } else {
                    639: 	my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160     www       640: 	my $xml_help = '<table><tr><td>'.
                    641: 	    &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
                    642: 						    "Problem Editing Help").
                    643: 						    '</td><td>'.
1.178     albertel  644:        &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
                    645:                 '</td></tr></table>';
1.145     albertel  646: 	if ($cols > 80) { $cols = 80; }
                    647: 	if ($cols < 70) { $cols = 70; }
                    648: 	if ($rows < 20) { $rows = 20; }
1.183     albertel  649: 	my $bodytag='<body bgcolor="#ffffff">';
                    650: 	if ($ENV{'environment.remote'} eq 'off') {
                    651: 	    $bodytag=&Apache::loncommon::bodytag();
                    652: 	}
                    653: 	$result.='<html>'.$bodytag.&Apache::lonxml::message_location().'
1.64      albertel  654:             <form name="lonhomework" method="POST" action="'.
1.179     albertel  655: 	    &HTML::Entities::encode($ENV{'request.uri'},'<>&"').'">'.
                    656: 	    &Apache::structuretags::remember_problem_state().'
1.146     albertel  657:             <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170     matthew   658:             <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    659:             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.64      albertel  660:             <hr />
1.170     matthew   661:             <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
                    662:             <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
                    663:             <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64      albertel  664:             <hr />
1.110     albertel  665:             ' . $xml_help . '
1.64      albertel  666:             <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.172     albertel  667: 	    &HTML::Entities::encode($problem,'<>&"').'</textarea>
1.64      albertel  668:             </form></body></html>';
1.171     albertel  669: 	&Apache::lonxml::add_messages(\$result);
1.145     albertel  670: 	$request->print($result);
                    671:     }
                    672:     return '';
1.47      albertel  673: }
1.188   ! foxr      674: #
        !           675: #    Render the page in whatever target desired.
        !           676: #
1.47      albertel  677: 
1.41      albertel  678: sub renderpage {
1.145     albertel  679:     my ($request,$file) = @_;
1.52      albertel  680: 
1.145     albertel  681:     my (@targets) = &get_target();
1.161     albertel  682:     &Apache::lonhomework::showhashsubset(\%ENV,'form.');
1.145     albertel  683:     &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171     albertel  684:     my $overall_result;
1.145     albertel  685:     foreach my $target (@targets) {
1.183     albertel  686: 	# FIXME need to do something intelligent when a problem goes
                    687:         # from viewable to not viewable due to map conditions
                    688: 	#&setuppermissions();
                    689: 	#if (   $Apache::lonhomework::browse ne '2'
                    690: 	#    && $Apache::lonhomework::browse ne 'F' ) {
                    691: 	#    $request->print(" You most likely shouldn't see me.");
                    692: 	#}
1.145     albertel  693: 	#my $t0 = [&gettimeofday()];
                    694: 	my $problem=&Apache::lonnet::getfile($file);
                    695: 	if ($problem eq -1) {
1.146     albertel  696: 	    &Apache::lonxml::error("<b> ".&mt('Unable to find')." <i>$file</i></b>");
1.145     albertel  697: 	    $problem='';
                    698: 	}
1.52      albertel  699: 
1.145     albertel  700: 	my %mystyle;
                    701: 	my $result = '';
                    702: 	if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
                    703: 	if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
                    704: 	if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%ENV,'^form');}
                    705: 
                    706: 	&Apache::lonxml::debug("Should be parsing now");
                    707: 	$result = &Apache::lonxml::xmlparse($request, $target, $problem,
                    708: 					    &setup_vars($target),%mystyle);
                    709: 	undef($Apache::lonhomework::parsing_a_problem);
                    710: 	#$request->print("Result follows:");
                    711: 	if ($target eq 'modified') {
                    712: 	    &handle_save_or_undo($request,\$problem,\$result);
                    713: 	} else {
                    714: 	    if ($target eq 'analyze') {
                    715: 		$result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
                    716: 		undef(%Apache::lonhomework::analyze);
                    717: 	    }
                    718: 	    #my $td=&tv_interval($t0);
                    719: 	    #if ( $Apache::lonxml::debug) {
                    720: 	    #$result =~ s:</body>::;
                    721: 	    #$result.="<br />Spent $td seconds processing target $target\n</body>";
                    722: 	    #}
1.171     albertel  723: #	    $request->print($result);
                    724: 	    $overall_result.=$result;
                    725: #	    $request->rflush();
1.145     albertel  726: 	}
                    727: 	#$request->print(":Result ends");
                    728: 	#my $td=&tv_interval($t0);
1.52      albertel  729:     }
1.171     albertel  730:     &Apache::lonxml::add_messages(\$overall_result);
                    731:     $request->print($overall_result);   
                    732:     $request->rflush();   
1.41      albertel  733: }
                    734: 
1.42      albertel  735: # with no arg it returns a HTML <option> list of the template titles
                    736: # with one arg it returns the filename associated with the arg passed
                    737: sub get_template_list {
1.145     albertel  738:     my ($namewanted,$extension) = @_;
                    739:     my $result;
                    740:     my @allnames;
                    741:     &Apache::lonxml::debug("Looking for :$extension:");
                    742:     foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
                    743: 	my $name=&Apache::lonnet::metadata($file,'title');
                    744: 	if ($namewanted && ($name eq $namewanted)) {
                    745: 	    $result=$file;
                    746: 	    last;
                    747: 	} else {
                    748: 	    if ($name) { push (@allnames, $name); }
                    749: 	}
                    750:     }
                    751:     if (@allnames && !$result) {
1.146     albertel  752: 	$result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145     albertel  753: 	    join('</option><option>',sort(@allnames)).'</option>';
1.42      albertel  754:     }
1.145     albertel  755:     return $result;
1.42      albertel  756: }
                    757: 
                    758: sub newproblem {
1.65      matthew   759:     my ($request) = @_;
                    760:     my $extension=$request->uri;
                    761:     $extension=~s:^.*\.([\w]+)$:$1:;
                    762:     &Apache::lonxml::debug("Looking for :$extension:");
1.131     albertel  763:     my $templatelist=&get_template_list('',$extension);
1.85      albertel  764:     if ($ENV{'form.template'} &&
1.128     albertel  765: 	$ENV{'form.template'} ne "Select a $extension template") {
1.65      matthew   766: 	use File::Copy;
                    767: 	my $file = &get_template_list($ENV{'form.template'},$extension);
                    768: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    769: 	copy($file,$dest);
                    770: 	&renderpage($request,$dest);
1.131     albertel  771:     } elsif($ENV{'form.newfile'} && !$templatelist) {
                    772: 	# I don't like hard-coded filenames but for now, this will work.
                    773: 	use File::Copy;
                    774: 	my $templatefilename =
                    775: 	    $request->dir_config('lonIncludes').'/templates/blank.problem';
                    776: 	&Apache::lonxml::debug("$templatefilename");
                    777: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
                    778: 	copy($templatefilename,$dest);
                    779: 	&renderpage($request,$dest);
1.85      albertel  780:     } else {
1.176     albertel  781: 	my $url=&HTML::Entities::encode($request->uri,'<>&"');
                    782: 	my $shownurl=$url;	
1.157     albertel  783: 	$shownurl=~s-^/~-/priv/-;
1.65      matthew   784: 	my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128     albertel  785: 	my $errormsg;
                    786: 	if ($ENV{'form.newfile'}) {
1.146     albertel  787: 	    $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128     albertel  788: 	}
1.85      albertel  789: 	my $instructions;
1.186     albertel  790: 	my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,
                    791: 					($ENV{'environment.remote'} ne 'off'));
1.146     albertel  792: 	if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147     albertel  793: 	my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146     albertel  794: 			  'resource' => 'resource',
                    795: 			  'requested' => 'The requested file',
                    796: 			  'not exist' => 'currently does not exist',
                    797: 			  'createnew' => 'To create a new',
                    798: 			  'click' => 'click on the',
                    799: 			  'Create' => 'Create',
                    800: 			  'button' => 'button');
1.65      matthew   801: 	$request->print(<<ENDNEWPROBLEM);
1.159     www       802: $bodytag
1.148     albertel  803: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128     albertel  804: $errormsg
1.157     albertel  805: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105     www       806: <p>
1.146     albertel  807: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105     www       808: </p>
                    809: <p><form action="$url" method="POST">
1.42      albertel  810: ENDNEWPROBLEM
1.85      albertel  811: 	if (defined($templatelist)) {
                    812: 	    $request->print("<select name=\"template\">$templatelist</select>");
                    813: 	}
1.146     albertel  814: 	$request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.105     www       815: 	$request->print("</form></p></body>");
1.65      matthew   816:     }
                    817:     return '';
1.42      albertel  818: }
                    819: 
                    820: sub view_or_edit_menu {
1.145     albertel  821:     my ($request) = @_;
1.176     albertel  822:     my $url=&HTML::Entities::encode($request->uri,'<>&"');
1.147     albertel  823:     my %lt=&Apache::lonlocal::texthash( 'would' => 'Would you like to',
1.146     albertel  824: 		      'view' => 'View',
                    825: 		      'Edit' => 'edit',
                    826: 		      'or' => 'or',
                    827: 		      'the problem' => 'the problem');
1.145     albertel  828:     $request->print(<<EDITMENU);
1.42      albertel  829: <body bgcolor="#FFFFFF">
                    830: <form action="$url" method="POST">
1.170     matthew   831: $lt{'would'} <input type="submit" name="problemmode" accesskey="v" value="&lt{'view'}">
                    832: &lt{'or'} <input type="submit" name="problemmode" accesskey="e" value="&lt{'Edit'}">
1.146     albertel  833: &lt{'the problem'}.
1.42      albertel  834: </form>
                    835: </body>
                    836: EDITMENU
                    837: }
                    838: 
1.41      albertel  839: sub handler {
1.145     albertel  840:     #my $t0 = [&gettimeofday()];
                    841:     my $request=$_[0];
                    842:     
                    843:     $Apache::lonxml::debug=$ENV{'user.debug'};
                    844:     $ENV{'request.uri'}=$request->uri;
1.180     albertel  845:     &setuppermissions();
1.145     albertel  846:     &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
                    847:     # some times multiple problemmodes are submitted, need to select
                    848:     # the last one
                    849:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    850:     if ( defined($ENV{'form.problemmode'}) &&
                    851: 	 ref($ENV{'form.problemmode'}) ) {
                    852: 	&Apache::lonxml::debug("Problem Mode ".join(",",@$ENV{'form.problemmode'}));
                    853: 	my $mode=$ENV{'form.problemmode'}->[-1];
                    854: 	undef $ENV{'form.problemmode'};
                    855: 	$ENV{'form.problemmode'}=$mode;
                    856:     }
                    857:     &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
                    858:     my $file=&Apache::lonnet::filelocation("",$request->uri);
                    859: 
                    860:     #check if we know where we are
                    861:     if ($ENV{'request.course.fn'} && !&Apache::lonnet::symbread()) { 
                    862: 	# if we are browsing we might not be able to know where we are
1.173     albertel  863: 	if ($Apache::lonhomework::browse ne 'F' && 
                    864: 	    $ENV{'request.state'} ne "construct") {
1.145     albertel  865: 	    #should know where we are, so ask
                    866: 	    if ( &Apache::lonnet::mod_perl_version() == 2 ) {
                    867: 		&Apache::lonnet::cleanenv();
                    868: 	    }
                    869: 	    $request->internal_redirect('/adm/ambiguous'); return;
                    870: 	}
                    871:     }
1.187     albertel  872:     if (&setupheader($request)) { return OK; }
1.41      albertel  873: 
1.145     albertel  874:     my ($symb) = &Apache::lonxml::whichuser();
                    875:     &Apache::lonxml::debug('symb is '.$symb);
                    876:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.150     albertel  877: 	if ($ENV{'form.resetdata'} eq &mt('Reset Submissions') ||
                    878: 	    $ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    879: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.145     albertel  880: 	    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    881: 	    &Apache::lonnet::tmpreset($symb,'',$domain,$name);
                    882: 	    &Apache::lonxml::debug("Attempt reset");
                    883: 	}
                    884:     }
                    885:     if ($ENV{'request.state'} eq "construct") {
                    886: 	if ( -e $file ) {
                    887: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    888: 						    ['problemmode']);
                    889: 	    if (!(defined $ENV{'form.problemmode'})) {
                    890: 		#first visit to problem in construction space
                    891: 		#&view_or_edit_menu($request);
                    892: 		$ENV{'form.problemmode'}='View';
                    893: 		&renderpage($request,$file);
1.150     albertel  894: 	    } elsif ($ENV{'form.problemmode'} eq &mt('EditXML')) {
1.145     albertel  895: 		&editxmlmode($request,$file);
1.150     albertel  896: 	    } elsif ($ENV{'form.problemmode'} eq &mt('Calculate answers')) {
1.145     albertel  897: 		&analyze($request,$file);
                    898: 	    } else {
                    899: 		&renderpage($request,$file);
                    900: 	    }
                    901: 	} else {
                    902: 	    # requested file doesn't exist in contruction space
                    903: 	    &newproblem($request);
                    904: 	}
                    905:     } else {
                    906: 	# just render the page normally outside of construction space
                    907: 	&Apache::lonxml::debug("not construct");
1.52      albertel  908: 	&renderpage($request,$file);
1.41      albertel  909:     }
1.145     albertel  910:     #my $td=&tv_interval($t0);
                    911:     #&Apache::lonxml::debug("Spent $td seconds processing");
                    912:     # &Apache::lonhomework::send_footer($request);
                    913:     # always turn off debug messages
                    914:     $Apache::lonxml::debug=0;
                    915:     return OK;
1.52      albertel  916: 
1.1       albertel  917: }
                    918: 
                    919: 1;
                    920: __END__

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>