Annotation of loncom/interface/londropadd.pm, revision 1.33

1.1       www         1: # The LearningOnline Network with CAPA
                      2: # Handler to drop and add students in courses 
                      3: #
1.33    ! matthew     4: # $Id: londropadd.pm,v 1.32 2002/04/26 19:10:54 matthew Exp $
1.17      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/
                     27: #
1.1       www        28: # (Handler to set parameters for assessments
                     29: #
                     30: # (Handler to resolve ambiguous file locations
                     31: #
                     32: # (TeX Content Handler
                     33: #
1.14      harris41   34: # YEAR=2000
1.1       www        35: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
                     36: #
                     37: # 10/11,10/12,10/16 Gerd Kortemeyer)
                     38: #
                     39: # 11/20,11/21,11/22,11/23,11/24,11/25,11/27,11/28,
                     40: # 12/08,12/12 Gerd Kortemeyer)
                     41: #
1.7       www        42: # 12/26,12/27,12/28,
1.14      harris41   43: # YEAR=2001
1.13      www        44: # 01/01/01,01/15,02/10,02/13,02/14,02/22 Gerd Kortemeyer
1.14      harris41   45: # 8/6 Scott Harrison
1.16      www        46: # Guy Albertelli
                     47: # 9/25 Gerd Kortemeyer
1.18      www        48: # 12/19 Guy Albertelli
                     49: # YEAR=2002
                     50: # 1/4 Gerd Kortemeyer
1.1       www        51: 
                     52: package Apache::londropadd;
                     53: 
                     54: use strict;
1.24      albertel   55: use Apache::lonnet();
                     56: use Apache::loncommon();
1.1       www        57: use Apache::Constants qw(:common :http REDIRECT);
                     58: 
1.10      www        59: # ================================================================ Print header
1.1       www        60: 
1.10      www        61: sub header {
1.27      matthew    62:     return(<<ENDHEAD);
1.1       www        63: <html>
                     64: <head>
                     65: <title>LON-CAPA Student Drop/Add</title>
                     66: </head>
                     67: <body bgcolor="#FFFFFF">
                     68: <img align=right src=/adm/lonIcons/lonlogos.gif>
                     69: <h1>Drop/Add Students</h1>
                     70: <form method="post" enctype="multipart/form-data"
                     71: action="/adm/dropadd" name="studentform">
                     72: <h2>Course: $ENV{'course.'.$ENV{'request.course.id'}.'.description'}</h2>
                     73: ENDHEAD
1.10      www        74: }
                     75: 
                     76: # =========== Drop student from all sections of a course, except optional $csec
1.26      matthew    77: sub modifystudent {
1.33    ! matthew    78:     my ($udom,$unam,$courseid,$csec,$desiredhost)=@_;
1.26      matthew    79:     # if $csec is undefined, drop the student from all the courses matching
                     80:     # this one.  If $csec is defined, drop them from all other sections of 
                     81:     # this course and add them to section $csec
1.25      matthew    82:     $courseid=~s/\_/\//g;
                     83:     $courseid=~s/^(\w)/\/$1/;
1.26      matthew    84:     my %roles = &Apache::lonnet::dump('roles',$udom,$unam);
                     85:     my ($tmp) = keys(%roles);
                     86:     # Bail out if we were unable to get the students roles
                     87:     return if ($tmp =~ /^(con_lost|error|no_such_host)/i);
                     88:     # Go through the roles looking for enrollment in this course
                     89:     foreach my $course (keys(%roles)) {
                     90:         my $value = $roles{$course};
                     91:         if ($course=~/^$courseid(?:\/)*(\w+)*\_st$/) {
                     92:             # We are in this course
1.25      matthew    93:             my $section=$1;
1.26      matthew    94:             $section='' if ($course eq $courseid.'_st');
1.25      matthew    95:             if (((!$section) && (!$csec)) || ($section ne $csec)) {
1.27      matthew    96:                 my (undef,$end,$start)=split(/\_/,$roles{$course});
1.25      matthew    97:                 my $now=time;
1.27      matthew    98:                 if (!($start && ($now<$start)) || !($end && ($now>$end))) {
1.25      matthew    99:                     my $reply=&Apache::lonnet::modifystudent
1.33    ! matthew   100:                         ($udom,$unam,'','','','','','','',
        !           101:                          $section,time,undef,undef,$desiredhost);
1.25      matthew   102:                 }
1.10      www       103:             }
                    104:         }
1.20      harris41  105:     }
1.10      www       106: }
                    107: 
1.31      matthew   108: # ============ build a domain and server selection form
                    109: sub domain_form {
                    110:     my ($defdom) = @_;
                    111:     # Set up domain and server selection forms
                    112:     #
                    113:     # Get the domains
                    114:     my @domains = &Apache::loncommon::get_domains();
                    115:     # build up the menu information to be passed to 
                    116:     # &Apache::loncommon::linked_select_forms
                    117:     my %select_menus;
                    118:     foreach my $dom (@domains) {
                    119:         # set up the text for this domain
                    120:         $select_menus{$dom}->{'text'}= $dom;
                    121:         # we want a choice of 'default' as the default in the second menu
                    122:         $select_menus{$dom}->{'default'}= 'default';
                    123:         $select_menus{$dom}->{'select2'}->{'default'} = 'default';
                    124:         # Now build up the other items in the second menu
                    125:         my %servers = &Apache::loncommon::get_home_servers($dom);
                    126:         foreach my $server (keys(%servers)) {
                    127:             $select_menus{$dom}->{'select2'}->{$server} 
                    128:                                             = "$server $servers{$server}";
                    129:         }
                    130:     }
                    131:     my $result  = &Apache::loncommon::linked_select_forms
                    132:         ('studentform',' with home server ',$defdom,
                    133:          'lcdomain','lcserver',\%select_menus);
                    134:     return $result;
                    135: }
                    136: 
1.10      www       137: # ============================================================== Menu Phase One
                    138: sub menu_phase_one {
                    139:     my $r=shift;
1.24      albertel  140:     my $upfile_select=&Apache::loncommon::upfile_select_html();
1.10      www       141:     $r->print(<<ENDUPFORM);
1.2       www       142: <input type=hidden name=phase value=two>
                    143: <hr>
                    144: <h3>Upload a courselist</h3>
1.24      albertel  145: $upfile_select
1.2       www       146: <p><input type=submit name=fileupload value="Upload Courselist">
                    147: <hr>
                    148: <h3>Enroll a single student</h3>
                    149: <p><input type=submit name=enroll value="Enroll Student">
                    150: <hr>
1.11      www       151: <h3>Drop students</h3>
                    152: <p><input type=submit name=drop value="Selection List">
1.2       www       153: ENDUPFORM
1.10      www       154: }
                    155: 
1.23      albertel  156: sub phase_two_header {
                    157:     my ($r,$datatoken,$distotal,$krbdefdom)=@_;
1.24      albertel  158:     my $javascript;
                    159:     if ($ENV{'form.upfile_associate'} eq 'reverse') {
                    160: 	$javascript=&phase_two_javascript_reverse_associate();
                    161:     } else {
                    162: 	$javascript=&phase_two_javascript_forward_associate();
                    163:     }
                    164:     my $javascript_validations=&javascript_validations($krbdefdom);
1.10      www       165:     $r->print(<<ENDPICK);
1.2       www       166: <hr>
                    167: <h3>Identify fields</h3>
1.22      albertel  168: Total number of records found in file: $distotal <hr />
                    169: Enter as many fields as you can. The system will inform you and bring you back
                    170: to this page if the data selected is insufficient to run your class.<hr />
1.26      matthew   171: <input type="submit" name="associate"  value="Reverse Association" />
                    172: <input type="hidden" name="phase"      value="three" />
                    173: <input type="hidden" name="datatoken"  value="$datatoken" />
1.24      albertel  174: <input type="hidden" name="fileupload" value="$ENV{'form.fileupload'}" />
                    175: <input type="hidden" name="upfiletype" value="$ENV{'form.upfiletype'}" />
1.26      matthew   176: <input type="hidden" name="upfile_associate" 
                    177:                                        value="$ENV{'form.upfile_associate'}" />
1.24      albertel  178: <hr />
1.28      matthew   179: <script type="text/javascript" language="Javascript">
1.24      albertel  180: $javascript
                    181: $javascript_validations
                    182: </script>
                    183: ENDPICK
                    184: }
                    185: 
                    186: sub javascript_validations {
                    187:     my ($krbdefdom)=@_;
1.28      matthew   188:     my %param = ( formname => 'studentform',
                    189:                   kerb_def_dom => $krbdefdom );
                    190:     my $authheader = &Apache::loncommon::authform_header(%param);
1.24      albertel  191:     return (<<ENDPICK);
                    192: function verify_message (vf,founduname,foundpwd,foundname,foundid,foundsec) {
1.3       www       193:     var foundatype=0;
                    194:     var message='';
                    195:     if (founduname==0) {
1.28      matthew   196: 	alert('You need to specify the username field');
1.3       www       197:         return;
                    198:     }
1.29      matthew   199:     if (current.radiovalue == null || current.radiovalue == 'nochange') {
1.28      matthew   200:         // They did not check any of the login radiobuttons.
                    201:         alert('You must choose an authentication type');
                    202:         return;
                    203:     }
                    204:     foundatype=1;
1.29      matthew   205:     if (current.argfield == null || current.argfield == '') {
1.28      matthew   206:         var alertmsg = '';
1.29      matthew   207:         switch (current.value) {
1.28      matthew   208:             case 'krb': 
                    209:                 alertmsg = 'You need to specify the Kerberos domain';
                    210:                 break;
                    211:             case 'loc':
                    212:             case 'fsys':
                    213:                 alertmsg = 'You need to specify the initial password';
                    214:                 break;
                    215:             case 'fsys':
                    216:                 alertmsg = '';
                    217:                 break;
                    218:             default: 
                    219:                 alertmsg = '';
1.3       www       220:         }
1.28      matthew   221:         if (alertmsg != '') {
                    222:             alert(alertmsg);
1.3       www       223:             return;
                    224:         }
                    225:     }
1.28      matthew   226: 
1.3       www       227:     if (foundname==0) { message='No name fields specified. '; }
                    228:     if (foundid==0) { message+='No ID or student number field specified. '; }
                    229:     if (foundsec==0) { message+='No section or group field specified. '; }
1.4       www       230:     if (vf.startdate.value=='') {
                    231: 	message+='No starting date set. ';
1.3       www       232:     }
1.4       www       233:     if (vf.enddate.value=='') {
                    234:         message+='No ending date set. ';
                    235:     }
                    236:     if ((vf.enddate.value!='') && (vf.startdate.value!='')) {
1.10      www       237:        if (Math.round(vf.enddate.value)<Math.round(vf.startdate.value)) {
1.4       www       238:           alert('Ending date is before starting date');
                    239:           return;
                    240:        }
                    241:     }
                    242:     if (message!='') {
                    243:        message+='Continue enrollment?';
                    244:        if (confirm(message)) {
                    245: 	  pclose();
                    246: 	  vf.submit();
                    247:        }
                    248:     } else {
                    249:       pclose();
                    250:       vf.submit();
1.24      albertel  251:     }
1.3       www       252: }
                    253: 
                    254: 
1.4       www       255:     function pclose() {
                    256:         parmwin=window.open("/adm/rat/empty.html","LONCAPAparms",
                    257:                  "height=350,width=350,scrollbars=no,menubar=no");
                    258:         parmwin.close();
                    259:     }
                    260: 
                    261:     function pjump(type,dis,value,marker,ret,call) {
                    262:         parmwin=window.open("/adm/rat/parameter.html?type="+escape(type)
                    263:                  +"&value="+escape(value)+"&marker="+escape(marker)
                    264:                  +"&return="+escape(ret)
                    265:                  +"&call="+escape(call)+"&name="+escape(dis),"LONCAPAparms",
                    266:                  "height=350,width=350,scrollbars=no,menubar=no");
                    267: 
                    268:     }
                    269: 
                    270:     function dateset() {
                    271:         if (document.studentform.pres_marker.value=='end') {
                    272:            document.studentform.enddate.value=
                    273: 	       document.studentform.pres_value.value;
                    274:         }
                    275:         if (document.studentform.pres_marker.value=='start') {
                    276:            document.studentform.startdate.value=
                    277: 	       document.studentform.pres_value.value;
                    278:         }
                    279:         pclose();
                    280:     }
1.3       www       281: 
1.28      matthew   282: $authheader
1.24      albertel  283: ENDPICK
1.28      matthew   284: 
1.24      albertel  285: }
                    286: 
                    287: sub phase_two_javascript_forward_associate {
                    288:     return(<<ENDPICK);
                    289: function verify(vf) {
                    290:     var founduname=0;
                    291:     var foundpwd=0;
                    292:     var foundname=0;
                    293:     var foundid=0;
                    294:     var foundsec=0;
                    295:     var tw;
                    296:     for (i=0;i<=vf.nfields.value;i++) {
                    297:         tw=eval('vf.f'+i+'.selectedIndex');
                    298:         if (tw==1) { founduname=1; }
                    299:         if ((tw>=2) && (tw<=6)) { foundname=1; }
                    300:         if (tw==7) { foundid=1; }
                    301:         if (tw==8) { foundsec=1; }
                    302:         if (tw==9) { foundpwd=1; }
                    303:     }
                    304:     verify_message(vf,founduname,foundpwd,foundname,foundid,foundsec);
                    305: }
                    306: 
                    307: function flip(vf,tf) {
                    308:    var nw=eval('vf.f'+tf+'.selectedIndex');
                    309:    var i;
                    310:    for (i=0;i<=vf.nfields.value;i++) {
                    311:       if ((i!=tf) && (eval('vf.f'+i+'.selectedIndex')==nw)) {
                    312:           eval('vf.f'+i+'.selectedIndex=0;')
                    313:       }
                    314:    }
                    315:    if (tf==1 && nw!=0) {
                    316:       for (i=2;i<=5;i++) {
                    317:          eval('vf.f'+i+'.selectedIndex=0;')
                    318:       }
                    319:    }
                    320:    if (nw==2) {
                    321:       for (i=0;i<=vf.nfields.value;i++) {
                    322:          if ((eval('vf.f'+i+'.selectedIndex')>=3) &&
                    323:              (eval('vf.f'+i+'.selectedIndex')<=6)) {
                    324:              eval('vf.f'+i+'.selectedIndex=0;')
                    325:          }
                    326:       }
                    327:    }
                    328:    if ((nw>=3) && (nw<=6)) {
                    329:       for (i=0;i<=vf.nfields.value;i++) {
                    330:          if (eval('vf.f'+i+'.selectedIndex')==2) {
                    331:              eval('vf.f'+i+'.selectedIndex=0;')
                    332:          }
                    333:       }
                    334:    }
                    335:    if (nw==9) {
1.28      matthew   336:        changed_radio('int',document.studentform);
                    337:        set_auth_radio_buttons('int',document.studentform);
                    338:        vf.intarg.value='';
                    339:        vf.krbarg.value='';
1.24      albertel  340:        vf.locarg.value='';
                    341:    }
                    342: }
                    343: 
                    344: function clearpwd(vf) {
                    345:     var i;
                    346:     for (i=0;i<=vf.nfields.value;i++) {
                    347:         if (eval('vf.f'+i+'.selectedIndex')==9) {
                    348:             eval('vf.f'+i+'.selectedIndex=0;')
                    349:         }
                    350:     }
                    351: }
                    352: 
                    353: ENDPICK
                    354: }
                    355: 
                    356: sub phase_two_javascript_reverse_associate {
                    357:     return(<<ENDPICK);
                    358: function verify(vf) {
                    359:     var founduname=0;
                    360:     var foundpwd=0;
                    361:     var foundname=0;
                    362:     var foundid=0;
                    363:     var foundsec=0;
                    364:     var tw;
                    365:     for (i=0;i<=vf.nfields.value;i++) {
                    366:         tw=eval('vf.f'+i+'.selectedIndex');
                    367:         if (i==0 && tw!=0) { founduname=1; }
                    368:         if (((i>=1) && (i<=5)) && tw!=0 ) { foundname=1; }
                    369:         if (i==6 && tw!=0) { foundid=1; }
                    370:         if (i==7 && tw!=0) { foundsec=1; }
                    371:         if (i==8 && tw!=0) { foundpwd=1; }
                    372:     }
                    373:     verify_message(vf,founduname,foundpwd,foundname,foundid,foundsec);
                    374: }
                    375: 
                    376: function flip(vf,tf) {
                    377:    var nw=eval('vf.f'+tf+'.selectedIndex');
                    378:    var i;
                    379:    // picked the all one one name field, reset the other name ones to blank
                    380:    if (tf==1 && nw!=0) {
                    381:       for (i=2;i<=5;i++) {
                    382:          eval('vf.f'+i+'.selectedIndex=0;')
                    383:       }
                    384:    }
                    385:    //picked one of the piecewise name fields, reset the all in
                    386:    //one field to blank
                    387:    if ((tf>=2) && (tf<=5) && (nw!=0)) {
                    388:       eval('vf.f1.selectedIndex=0;')
                    389:    }
                    390:    // intial password specified, pick internal authentication
                    391:    if (tf==8 && nw!=0) {
1.28      matthew   392:        changed_radio('int',document.studentform);
                    393:        set_auth_radio_buttons('int',document.studentform);
                    394:        vf.krbarg.value='';
                    395:        vf.intarg.value='';
1.24      albertel  396:        vf.locarg.value='';
                    397:    }
                    398: }
                    399: 
                    400: function clearpwd(vf) {
                    401:     var i;
                    402:     if (eval('vf.f8.selectedIndex')!=0) {
                    403:         eval('vf.f8.selectedIndex=0;')
                    404:     }
                    405: }
1.2       www       406: ENDPICK
1.23      albertel  407: }
1.10      www       408: 
1.23      albertel  409: sub phase_two_end {
                    410:     my ($r,$i,$keyfields,$defdom,$today,$halfyear)=@_;
1.28      matthew   411:     my %param = ( formname => 'document.studentform');
                    412:     my $krbform = &Apache::loncommon::authform_kerberos(%param);
                    413:     my $intform = &Apache::loncommon::authform_internal(%param);
                    414:     my $locform = &Apache::loncommon::authform_local(%param);
1.31      matthew   415:     my $domform = &domain_form($defdom);
1.23      albertel  416:     $r->print(<<ENDPICK);
1.3       www       417: </table>
1.10      www       418: <input type=hidden name=nfields value=$i>
                    419: <input type=hidden name=keyfields value="$keyfields">
1.3       www       420: <h3>Login Type</h3>
1.15      albertel  421: <p>Note: this will not take effect if the user already exists</p>
                    422: <p>
1.28      matthew   423: $krbform
1.15      albertel  424: </p>
                    425: <p>
1.28      matthew   426: $intform
1.15      albertel  427: </p>
                    428: <p>
1.28      matthew   429: $locform
1.15      albertel  430: </p>
1.5       www       431: <h3>LON-CAPA Domain for Students</h3>
1.29      matthew   432: LON-CAPA domain: $domform <p>
1.5       www       433: <h3>Starting and Ending Dates</h3>
1.26      matthew   434: <input type="hidden" value=''          name="pres_value"  >
                    435: <input type="hidden" value=''          name="pres_type"   >
                    436: <input type="hidden" value=''          name="pres_marker" >
                    437: <input type="hidden" value='$today'    name="startdate"   >
                    438: <input type="hidden" value='$halfyear' name="enddate"     >
1.4       www       439: <a 
                    440:  href="javascript:pjump('date_start','Enrollment Starting Date',document.studentform.startdate.value,'start','studentform.pres','dateset');"
                    441: >Set Starting Date</a><p>
                    442: 
                    443: <a 
                    444:  href="javascript:pjump('date_end','Enrollment Ending Date',document.studentform.enddate.value,'end','studentform.pres','dateset');"
                    445: >Set Ending Date</a><p>
1.5       www       446: <h3>Full Update</h3>
                    447: <input type=checkbox name=fullup value=yes> Full update 
1.11      www       448: (also print list of users not enrolled anymore)<p>
1.18      www       449: <h3>ID/Student Number</h3>
                    450: <input type=checkbox name=forceid value=yes> 
                    451: Disable ID/Student Number Safeguard and Force Change of Conflicting IDs
1.19      www       452: (only do if you know what you are doing)<p>
1.26      matthew   453: <input type="button" onClick="verify(this.form)" value="Update Courselist"><br>
1.6       www       454: Note: for large courses, this operation might be time consuming.
1.3       www       455: ENDPICK
1.23      albertel  456: }
1.24      albertel  457: 
1.23      albertel  458: # ======================================================= Menu Phase Two Upload
                    459: sub menu_phase_two_upload {
                    460:     my $r=shift;
1.26      matthew   461: 
1.24      albertel  462:     my $datatoken;
                    463:     if (!$ENV{'form.datatoken'}) {
1.26      matthew   464:       $datatoken=&Apache::loncommon::upfile_store($r);
1.24      albertel  465:     } else {
1.26      matthew   466:       $datatoken=$ENV{'form.datatoken'};
                    467:       &Apache::loncommon::load_tmp_file($r);
1.24      albertel  468:     }
                    469:     my @records=&Apache::loncommon::upfile_record_sep();
1.23      albertel  470:     my $total=$#records;
                    471:     my $distotal=$total+1;
                    472:     $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
                    473:     my $krbdefdom=$1;
                    474:     $krbdefdom=~tr/a-z/A-Z/;
                    475:     my $today=time;
                    476:     my $halfyear=$today+15552000;
                    477:     my $defdom=$r->dir_config('lonDefDomain');
                    478:     &phase_two_header($r,$datatoken,$distotal,$krbdefdom);
1.24      albertel  479:     my $i;
                    480:     my $keyfields;
1.23      albertel  481:     if ($total>=0) {
1.24      albertel  482: 	my @d=(['username','Username'],['names','Last Name, First Names'],
                    483: 	       ['fname','First Name'],['mname','Middle Names/Initials'],
                    484: 	       ['lname','Last Name'],['gen','Generation'],
                    485: 	       ['id','ID/Student Number'],['sec','Group/Section'],
                    486: 	       ['ipwd','Initial Password']);
                    487: 	if ($ENV{'form.upfile_associate'} eq 'reverse') {	
                    488: 	    &Apache::loncommon::csv_print_samples($r,\@records);
                    489: 	    $i=&Apache::loncommon::csv_print_select_table($r,\@records,\@d);
                    490: 	    foreach (@d) { $keyfields.=$_->[0].','; }
                    491: 	    chop($keyfields);
                    492: 	} else {
                    493: 	    unshift(@d,['none','']);
                    494: 	    $i=&Apache::loncommon::csv_samples_select_table($r,\@records,\@d);
                    495: 	    my %sone=&Apache::loncommon::record_sep($records[0]);
                    496: 	    $keyfields=join(',',sort(keys(%sone)));
1.23      albertel  497: 	}
                    498:     }
                    499:     &phase_two_end($r,$i,$keyfields,$defdom,$today,$halfyear);
1.10      www       500: }
                    501: 
1.12      www       502: # ======================================================= Enroll single student
                    503: sub enroll_single_student {
                    504:     my $r=shift;
                    505:     $r->print('<h3>Enrolling Student</h3>');
1.31      matthew   506:     $r->print($ENV{'form.cuname'}." in domain ".$ENV{'form.lcdomain'});
1.12      www       507:     if (($ENV{'form.cuname'})&&($ENV{'form.cuname'}!~/\W/)&&
1.31      matthew   508:         ($ENV{'form.lcdomain'})&&($ENV{'form.lcdomain'}!~/\W/)) {
                    509:         # Deal with home server selection
                    510:         my $domain=$ENV{'form.lcdomain'};
                    511:         my $desiredhost = $ENV{'form.lcserver'};
                    512:         if (lc($desiredhost) eq 'default') {
                    513:             $desiredhost = undef;
                    514:         } else {
                    515:             my %home_servers = &Apache::loncommon::get_home_servers($domain);
                    516:             if (! exists($home_servers{$desiredhost})) {
                    517:                 $r->print('<font color="#ff0000">Error:</font>'.
                    518:                           'Invalid home server specified');
                    519:                 return;
                    520:             }
                    521:         }
                    522:         $r->print(" with server $desiredhost :");
                    523:         # End of home server selection logic
1.12      www       524: 	my $amode='';
                    525:         my $genpwd='';
                    526:         if ($ENV{'form.login'} eq 'krb') {
1.26      matthew   527:            $amode='krb4';
1.28      matthew   528:            $genpwd=$ENV{'form.krbarg'};
1.12      www       529:         } elsif ($ENV{'form.login'} eq 'int') {
1.26      matthew   530:            $amode='internal';
1.28      matthew   531:            $genpwd=$ENV{'form.intarg'};
1.15      albertel  532:         }  elsif ($ENV{'form.login'} eq 'loc') {
                    533: 	    $amode='localauth';
                    534: 	    $genpwd=$ENV{'form.locarg'};
                    535: 	    if (!$genpwd) { $genpwd=" "; }
                    536: 	}
1.12      www       537:         if (($amode) && ($genpwd)) {
1.33    ! matthew   538:             &modifystudent($ENV{'form.lcdomain'},$ENV{'form.cuname'},
        !           539:                            $ENV{'request.course.id'},$ENV{'form.csec'},
        !           540:                             $desiredhost);
1.26      matthew   541:           $r->print(&Apache::lonnet::modifystudent(
1.31      matthew   542:                       $ENV{'form.lcdomain'},$ENV{'form.cuname'},
1.26      matthew   543:                       $ENV{'form.cstid'},$amode,$genpwd,
                    544:  	              $ENV{'form.cfirst'},$ENV{'form.cmiddle'},
                    545:                       $ENV{'form.clast'},$ENV{'form.cgen'},
                    546:                       $ENV{'form.csec'},$ENV{'form.enddate'},
1.31      matthew   547:                       $ENV{'form.startdate'},$ENV{'form.forceid'},
                    548:                     $desiredhost));
1.12      www       549: 	} else {
1.26      matthew   550:            $r->print('Invalid login mode or password');    
1.12      www       551:         }          
                    552:     } else {
                    553:         $r->print('Invalid username or domain');
1.26      matthew   554:     }    
1.12      www       555: }
                    556: 
1.10      www       557: # ======================================================= Menu Phase Two Enroll
                    558: sub menu_phase_two_enroll {
                    559:     my $r=shift;
1.26      matthew   560:     my ($krbdefdom) = $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1.11      www       561:     $krbdefdom=~tr/a-z/A-Z/;
1.26      matthew   562:     my $today    = time;
                    563:     my $halfyear = $today+15552000;
1.11      www       564:     my $defdom=$r->dir_config('lonDefDomain');
1.24      albertel  565:     my $javascript_validations=&javascript_validations($krbdefdom);
1.28      matthew   566:     # Set up authentication forms
                    567:     my %param = ( formname => 'document.studentform');
                    568:     my $krbform = &Apache::loncommon::authform_kerberos(%param);
                    569:     my $intform = &Apache::loncommon::authform_internal(%param);
                    570:     my $locform = &Apache::loncommon::authform_local(%param);
1.29      matthew   571:     # Set up domain selection form
1.31      matthew   572:     my $domform = &domain_form($defdom);
1.28      matthew   573:     # Print it all out
1.11      www       574:     $r->print(<<ENDSENROLL);
1.28      matthew   575: <script type="text/javascript" language="Javascript">
1.12      www       576: function verify(vf) {
                    577:     var founduname=0;
                    578:     var foundpwd=0;
                    579:     var foundname=0;
                    580:     var foundid=0;
                    581:     var foundsec=0;
                    582:     var tw;
1.26      matthew   583:     if ((typeof(vf.cuname.value) !="undefined") && (vf.cuname.value!='') && 
1.31      matthew   584: 	(typeof(vf.lcdomain.value)!="undefined") && (vf.lcdomain.value!='')) {
1.12      www       585:         founduname=1;
                    586:     }
1.14      harris41  587:     if ((typeof(vf.cfirst.value)!="undefined") && (vf.cfirst.value!='') &&
1.26      matthew   588: 	(typeof(vf.clast.value) !="undefined") && (vf.clast.value!='')) {
1.12      www       589:         foundname=1;
                    590:     }
1.14      harris41  591:     if ((typeof(vf.csec.value)!="undefined") && (vf.csec.value!='')) {
1.12      www       592:         foundsec=1;
                    593:     }
1.14      harris41  594:     if ((typeof(vf.cstid.value)!="undefined") && (vf.cstid.value!='')) {
1.12      www       595: 	foundid=1;
                    596:     }
                    597:     if (founduname==0) {
                    598: 	alert('You need to specify at least the username and domain fields');
                    599:         return;
                    600:     }
1.24      albertel  601:     verify_message(vf,founduname,foundpwd,foundname,foundid,foundsec);
1.12      www       602: }
                    603: 
1.24      albertel  604: $javascript_validations
1.12      www       605: 
1.24      albertel  606: function clearpwd(vf) {
                    607:     //nothing else needs clearing
1.15      albertel  608: }
                    609: 
1.12      www       610: </script>
1.11      www       611: <h3>Personal Data</h3>
1.26      matthew   612: First Name:  <input type="text" name="cfirst"  size="15"><br>
                    613: Middle Name: <input type="text" name="cmiddle" size="15"><br>
                    614: Last Name:   <input type="text" name="clast"   size="15"><br>
                    615: Generation:  <input type="text" name="cgen"    size="5"> 
1.11      www       616: 
1.26      matthew   617: <p>ID/Student Number: <input type="text" name="cstid" size="10"></p>
1.11      www       618: 
1.26      matthew   619: <p>Group/Section: <input type=text name=csec size=5></p>
1.11      www       620: 
1.12      www       621: <h3>Login Data</h3>
1.26      matthew   622: <p>Username: <input type="text" name="cuname"  size="15"></p>
1.29      matthew   623: <p>Domain:   $domform</p>
1.26      matthew   624: <p>Note: login settings below  will not take effect if the user already exists
                    625: </p><p>
1.28      matthew   626: $krbform
1.26      matthew   627: </p><p>
1.28      matthew   628: $intform
1.26      matthew   629: </p><p>
1.28      matthew   630: $locform
1.26      matthew   631: </p><p>
1.11      www       632: <h3>Starting and Ending Dates</h3>
                    633: <input type="hidden" value='' name="pres_value">
                    634: <input type="hidden" value='' name="pres_type">
                    635: <input type="hidden" value='' name="pres_marker">
                    636: <input type="hidden" value='$today' name=startdate>
                    637: <input type="hidden" value='$halfyear' name=enddate>
1.26      matthew   638: </p><p>
1.11      www       639: <a 
                    640:  href="javascript:pjump('date_start','Enrollment Starting Date',document.studentform.startdate.value,'start','studentform.pres','dateset');"
1.26      matthew   641: >Set Starting Date</a>
                    642: </p><p>
1.11      www       643: <a 
                    644:  href="javascript:pjump('date_end','Enrollment Ending Date',document.studentform.enddate.value,'end','studentform.pres','dateset');"
1.26      matthew   645: >Set Ending Date</a>
                    646: </p><p>
1.18      www       647: <h3>ID/Student Number</h3>
1.26      matthew   648: <input type="checkbox" name="forceid" value="yes"> 
1.18      www       649: Disable ID/Student Number Safeguard and Force Change of Conflicting IDs
1.19      www       650: (only do if you know what you are doing)<p>
1.26      matthew   651: <input type="button" onClick="verify(this.form)" value="Enroll as student"><br>
                    652: <input type="hidden" name="phase" value="five">
                    653: </p>
1.11      www       654: ENDSENROLL
1.10      www       655: }
                    656: 
1.26      matthew   657: # =================================================== get the current classlist
                    658: sub get_current_classlist {
                    659:     my ($domain,$identifier) = @_;
                    660:     # domain is the domain the class is being run in
                    661:     # identifier is the internal, unique identifier for the class.
                    662:     my %currentlist=();
                    663:     my $now=time;
                    664:     my %results=&Apache::lonnet::dump('classlist',$domain,$identifier);
                    665:     my ($tmp) = keys(%results);
                    666:     if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
                    667:         foreach my $student (keys(%results)) {
                    668:             # Extract the start and end dates
                    669:             my ($end,$start)=split(/\:/,$results{$student});
                    670:             # If the class isn't over, put it in the list
                    671:             unless (($end) && ($now>$end)) { 
                    672:                 $currentlist{$student}=1;
                    673:             }
                    674:         }
1.27      matthew   675:         return (undef,%currentlist);
1.26      matthew   676:     } else {
1.27      matthew   677:         return ($tmp,undef);
1.26      matthew   678:     }
                    679: }
                    680: 
1.10      www       681: # ========================================================= Menu Phase Two Drop
                    682: sub menu_phase_two_drop {
                    683:     my $r=shift;
1.11      www       684:     my $cid=$ENV{'request.course.id'};
1.27      matthew   685:     my ($error,%currentlist)=&get_current_classlist($ENV{'course.'.$cid.'.domain'},
1.26      matthew   686:                                            $ENV{'course.'.$cid.'.num'});
1.27      matthew   687:     if (defined($error)) {
                    688:         $r->print('<pre>ERROR:$error</pre>');
                    689:     }
1.26      matthew   690:     if (!defined(%currentlist)) { 
1.27      matthew   691:         $r->print("There are no students currently enrolled.\n");
1.26      matthew   692:     } else {
                    693:         # Print out the available choices
1.25      matthew   694:         &show_drop_list($r,%currentlist);
                    695:     }
1.11      www       696: }
                    697: 
                    698: # =================================================== Show student list to drop
                    699: sub show_drop_list {
                    700:     my ($r,%currentlist)=@_;
                    701:     my $cid=$ENV{'request.course.id'};
1.26      matthew   702:     $r->print(<<'END');
1.32      matthew   703: <script>
                    704: function checkAll(field)
                    705: {
                    706:     for (i = 0; i < field.length; i++)
                    707:         field[i].checked = true ;
                    708: }
                    709: 
                    710: function uncheckAll(field)
                    711: {
                    712:     for (i = 0; i < field.length; i++)
                    713:         field[i].checked = false ;
                    714: }
                    715: </script>
                    716: <p>
1.26      matthew   717: <input type="hidden" name="phase" value="four">
                    718: <table border=2>
                    719: <tr><th>&nbsp;</th><th>username</th><th>domain</th>
                    720: <th>ID</th><th>student name</th><th>generation</th>
                    721: <th>section</th></tr>
                    722: END
1.25      matthew   723:     foreach (sort keys %currentlist) {
                    724:         my ($sname,$sdom)=split(/\:/,$_);
                    725:         my %reply=&Apache::lonnet::idrget($sdom,$sname);
                    726:         my $ssec=&Apache::lonnet::usection($sdom,$sname,$cid);
1.26      matthew   727:         my %info=&Apache::lonnet::get('environment',
                    728:                                       ['firstname','middlename',
                    729:                                        'lastname','generation'],
                    730:                                       $sdom, $sname);
                    731:         my ($tmp) = keys(%info);
                    732:         if ($tmp =~ /^(con_lost|error|no_such_host)/i) {
                    733:             $r->print('<tr><td colspan="7"><font color="red">'.
                    734:                       'Internal error: unable to get environment '.
                    735:                       'for '.$sname.' in domain '.$sdom.'</font></td></tr>');
                    736:         } else {
                    737:             $r->print(<<"END");
                    738: <tr>
                    739:     <td><input type="checkbox" name="droplist" value="$_"></td>
                    740:     <td>$sname</td>
                    741:     <td>$sdom</td>
                    742:     <td>$reply{$sname}</td>
                    743:     <td>$info{'lastname'}, $info{'firstname'} $info{'middlename'}</td>
                    744:     <td>$info{'generation'}</td>
                    745:     <td>$ssec</td>
                    746: </tr>
                    747: END
                    748:         }
1.25      matthew   749:     }
                    750:     $r->print('</table><br>');
1.32      matthew   751:     $r->print(<<"END");
                    752: </p><p>
                    753: <input type="button" value="check all" onclick="javascript:checkAll(document.studentform.droplist)"> &nbsp;
                    754: <input type="button" value="uncheck all" onclick="javascript:uncheckAll(document.studentform.droplist)"> 
                    755: <p><input type=submit value="Drop Students"></p>
                    756: END
1.10      www       757: }
                    758: 
                    759: # ================================================= Drop/Add from uploaded file
                    760: sub upfile_drop_add {
                    761:     my $r=shift;
1.24      albertel  762:     &Apache::loncommon::load_tmp_file($r);
                    763:     my @studentdata=&Apache::loncommon::upfile_record_sep();
1.26      matthew   764:     my @keyfields = split(/\,/,$ENV{'form.keyfields'});
                    765:     my $cid = $ENV{'request.course.id'};
1.25      matthew   766:     my %fields=();
1.26      matthew   767:     for (my $i=0; $i<=$ENV{'form.nfields'}; $i++) {
1.25      matthew   768:         if ($ENV{'form.upfile_associate'} eq 'reverse') {
                    769:             if ($ENV{'form.f'.$i} ne 'none') {
                    770:                 $fields{$keyfields[$i]}=$ENV{'form.f'.$i};
                    771:             }
                    772:         } else {
                    773:             $fields{$ENV{'form.f'.$i}}=$keyfields[$i];
                    774:         }
                    775:     }
1.26      matthew   776:     #
                    777:     my $startdate = $ENV{'form.startdate'};
                    778:     my $enddate   = $ENV{'form.enddate'};
1.25      matthew   779:     if ($startdate=~/\D/) { $startdate=''; }
1.26      matthew   780:     if ($enddate=~/\D/)   { $enddate=''; }
1.31      matthew   781:     # Determine domain and desired host (home server)
1.25      matthew   782:     my $domain=$ENV{'form.lcdomain'};
1.31      matthew   783:     my $desiredhost = $ENV{'form.lcserver'};
                    784:     if (lc($desiredhost) eq 'default') {
                    785:         $desiredhost = undef;
                    786:     } else {
                    787:         my %home_servers = &Apache::loncommon::get_home_servers($domain);
                    788:         if (! exists($home_servers{$desiredhost})) {
                    789:             $r->print('<font color="#ff0000">Error:</font>'.
                    790:                       'Invalid home server specified');
                    791:             return;
                    792:         }
                    793:     }
1.26      matthew   794:     # Determine authentication mechanism
                    795:     my $amode  = '';
                    796:     my $genpwd = '';
1.25      matthew   797:     if ($ENV{'form.login'} eq 'krb') {
                    798:         $amode='krb4';
1.28      matthew   799:         $genpwd=$ENV{'form.krbarg'};
1.25      matthew   800:     } elsif ($ENV{'form.login'} eq 'int') {
                    801:         $amode='internal';
1.28      matthew   802:         if ((defined($ENV{'form.intarg'})) && ($ENV{'form.intarg'})) {
                    803:             $genpwd=$ENV{'form.intarg'};
1.25      matthew   804:         }
                    805:     } elsif ($ENV{'form.login'} eq 'loc') {
                    806:         $amode='localauth';
                    807:         if ((defined($ENV{'form.locarg'})) && ($ENV{'form.locarg'})) {
                    808:             $genpwd=$ENV{'form.locarg'};
                    809:         }
                    810:     }
                    811:     unless (($domain=~/\W/) || ($amode eq '')) {
1.26      matthew   812:         #######################################
                    813:         ##         Enroll Students           ##
                    814:         #######################################
1.25      matthew   815:         $r->print('<h3>Enrolling Students</h3>');
                    816:         my $count=0;
                    817:         my $flushc=0;
                    818:         my %student=();
1.26      matthew   819:         # Get new classlist
1.25      matthew   820:         foreach (@studentdata) {
                    821:             my %entries=&Apache::loncommon::record_sep($_);
1.26      matthew   822:             # Determine student name
1.25      matthew   823:             unless (($entries{$fields{'username'}} eq '') ||
                    824:                     (!defined($entries{$fields{'username'}}))) {
1.26      matthew   825:                 my ($fname, $mname, $lname,$gen) = ('','','','');
1.25      matthew   826:                 if (defined($fields{'names'})) {
1.26      matthew   827:                     ($lname,$fname,$mname)=($entries{$fields{'names'}}=~
                    828:                                             /([^\,]+)\,\s*(\w+)\s*(.*)$/);
1.25      matthew   829:                 } else {
                    830:                     if (defined($fields{'fname'})) {
                    831:                         $fname=$entries{$fields{'fname'}};
                    832:                     }
                    833:                     if (defined($fields{'mname'})) {
                    834:                         $mname=$entries{$fields{'mname'}};
                    835:                     }
                    836:                     if (defined($fields{'lname'})) {
                    837:                         $lname=$entries{$fields{'lname'}};
                    838:                     }
                    839:                     if (defined($fields{'gen'})) {
                    840:                         $gen=$entries{$fields{'gen'}};
                    841:                     }
                    842:                 }
                    843:                 if ($entries{$fields{'username'}}=~/\W/) {
                    844:                     $r->print('<p><b>Unacceptable username: '.
1.10      www       845:                               $entries{$fields{'username'}}.' for user '.
1.4       www       846:                               $fname.' '.$mname.' '.$lname.' '.$gen.'</b><p>');
1.25      matthew   847:                 } else {
1.26      matthew   848:                     # determine section number
1.25      matthew   849:                     my $sec='';
                    850:                     my $username=$entries{$fields{'username'}};
                    851:                     if (defined($fields{'sec'})) {
                    852:                         if (defined($entries{$fields{'sec'}})) {
                    853:                             $sec=$entries{$fields{'sec'}};
                    854:                         }
                    855:                     }
1.26      matthew   856:                     # determine student id number
1.25      matthew   857:                     my $id='';
                    858:                     if (defined($fields{'id'})) {
                    859:                         if (defined($entries{$fields{'id'}})) {
                    860:                             $id=$entries{$fields{'id'}};
                    861:                         }
                    862:                         $id=~tr/A-Z/a-z/;
                    863:                     }
1.26      matthew   864:                     # determine student password
1.25      matthew   865:                     my $password='';
                    866:                     if ($genpwd) { 
                    867:                         $password=$genpwd; 
                    868:                     } else {
                    869:                         if (defined($fields{'ipwd'})) {
                    870:                             if ($entries{$fields{'ipwd'}}) {
                    871:                                 $password=$entries{$fields{'ipwd'}};
                    872:                             }
                    873:                         }
                    874:                     }
                    875:                     if ($password) {
1.33    ! matthew   876:                         &modifystudent($domain,$username,$cid,$sec,
        !           877:                                        $desiredhost);
1.25      matthew   878:                         my $reply=&Apache::lonnet::modifystudent
                    879:                             ($domain,$username,$id,$amode,$password,
                    880:                              $fname,$mname,$lname,$gen,$sec,$enddate,
1.31      matthew   881:                              $startdate,$ENV{'form.forceid'},$desiredhost);
1.26      matthew   882:                         if ($reply ne 'ok') {
                    883:                             $r->print('<p><b>'.
                    884:                                       'Error enrolling '.$username.': '.
                    885:                                       $reply.'</b></p>');
1.10      www       886:          		} else {
1.7       www       887:                             $count++; $flushc++;
                    888:                             $student{$username}=1;
1.6       www       889:                             $r->print('. ');
1.7       www       890:                             if ($flushc>15) {
                    891: 				$r->rflush;
                    892:                                 $flushc=0;
                    893:                             }
1.6       www       894:                         }
1.25      matthew   895:                     } else {
                    896:                         $r->print("<p><b>No password for $username</b><p>");
                    897:                     }
                    898:                 }
1.26      matthew   899:             }
                    900:         } # end of foreach (@studentdata)
1.25      matthew   901:         $r->print('<p>Processed Students: '.$count);
1.26      matthew   902:         #####################################
                    903:         #           Drop students           #
                    904:         #####################################
1.25      matthew   905:         if ($ENV{'form.fullup'} eq 'yes') {
                    906:             $r->print('<h3>Dropping Students</h3>');
1.26      matthew   907:             #  Get current classlist
1.27      matthew   908:             my ($error,%currentlist)=&get_current_classlist
1.26      matthew   909:                 ($ENV{'course.'.$cid.'.domain'},
                    910:                  $ENV{'course.'.$cid.'.num'});
1.27      matthew   911:             if (defined($error)) {
                    912:                 $r->print('<pre>ERROR:$error</pre>');
                    913:             }
1.26      matthew   914:             if (defined(%currentlist)) {
                    915:                 # Drop the students
1.25      matthew   916:                 foreach (@studentdata) {
                    917:                     my %entries=&Apache::loncommon::record_sep($_);
                    918:                     unless (($entries{$fields{'username'}} eq '') ||
                    919:                             (!defined($entries{$fields{'username'}}))) {
1.26      matthew   920:                         delete($currentlist{$entries{$fields{'username'}}.
                    921:                                                 ':'.$domain});
1.25      matthew   922:                     }
                    923:                 }
1.26      matthew   924:                 # Print out list of dropped students
1.25      matthew   925:                 &show_drop_list($r,%currentlist);
                    926:             } else {
1.27      matthew   927:                 $r->print("There are no students currently enrolled.\n");
1.25      matthew   928:             }
                    929:         }
1.26      matthew   930:     } # end of unless
1.10      www       931: }
                    932: 
1.11      www       933: # ================================================================== Phase four
                    934: sub drop_student_list {
                    935:     my $r=shift;
                    936:     my $count=0;
1.26      matthew   937:     foreach (@{$ENV{'form.droplist'}}) {
                    938:         my ($uname,$udom)=split(/\:/,$_);
                    939:         &modifystudent($udom,$uname,$ENV{'request.course.id'});
                    940:         $r->print('Dropped '.$uname.' at '.$udom.'<br>');
                    941:         $count++;
1.20      harris41  942:     }
1.11      www       943:     $r->print('<p><b>Dropped '.$count.' student(s).</b>');
                    944:     $r->print('<p>Re-enrollment will re-activate data.');
                    945: }
                    946: 
1.10      www       947: # ================================================================ Main Handler
                    948: sub handler {
1.26      matthew   949:     my $r=shift;
                    950:     if ($r->header_only) {
                    951:         $r->content_type('text/html');
                    952:         $r->send_http_header;
                    953:         return OK;
                    954:     }
                    955:     #  Needs to be in a course
                    956:     if (($ENV{'request.course.fn'}) && 
                    957:         (&Apache::lonnet::allowed('cst',$ENV{'request.course.id'}))) {
                    958:         # Start page
                    959:         $r->content_type('text/html');
                    960:         $r->send_http_header;
1.27      matthew   961:         $r->print(&header());
1.26      matthew   962:         # Phase one, initial screen
                    963:         unless ($ENV{'form.phase'}) {
                    964:             &menu_phase_one($r);
                    965:         }
                    966:         # Phase two
                    967:         if ($ENV{'form.associate'} eq 'Reverse Association') {
                    968:             $ENV{'form.phase'} = 'two';
                    969:             if ( $ENV{'form.upfile_associate'} ne 'reverse' ) {
                    970:                 $ENV{'form.upfile_associate'} = 'reverse';
                    971:             } else {
                    972:                 $ENV{'form.upfile_associate'} = 'forward';
                    973:             }
                    974:         }
                    975:         if ($ENV{'form.phase'} eq 'two') {
                    976:             if ($ENV{'form.fileupload'}) {
                    977:                 &menu_phase_two_upload($r);
                    978:             } elsif ($ENV{'form.enroll'}) {
                    979:                 &menu_phase_two_enroll($r);
                    980:             } elsif ($ENV{'form.drop'}) {
                    981:                 &menu_phase_two_drop($r);
                    982:             }
                    983:         }
                    984:         # Phase three
                    985:         if ($ENV{'form.phase'} eq 'three') {
                    986:             if ($ENV{'form.datatoken'}) {
                    987:                 &upfile_drop_add($r);
                    988:             }
                    989:         }
                    990:         # Phase four
                    991:         if ($ENV{'form.phase'} eq 'four') {
                    992:             &drop_student_list($r);
                    993:         }
                    994:         # Phase five
                    995:         if ($ENV{'form.phase'} eq 'five') {
                    996:             &enroll_single_student($r);
                    997:         }
                    998:          # End
                    999:         $r->print('</form></body></html>');
                   1000:     } else {
                   1001:         # Not in a course, or not allowed to modify parms
                   1002:         $ENV{'user.error.msg'}=
                   1003:             "/adm/dropadd:cst:0:0:Cannot drop or add students";
                   1004:         return HTTP_NOT_ACCEPTABLE; 
                   1005:     }
                   1006:     return OK;
1.1       www      1007: }
                   1008: 
                   1009: 1;
                   1010: __END__
                   1011: 

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