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Diff for /loncom/enrollment/localenroll.pm between versions 1.3 and 1.4

version 1.3, 2003/12/09 20:06:37 version 1.4, 2003/12/11 00:39:54
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 # local bits for automated enrollment  
 # $Id$  
 #  
 # Copyright Michigan State University Board of Trustees  
 #  
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  
 #  
 # LON-CAPA is free software; you can redistribute it and/or modify  
 # it under the terms of the GNU General Public License as published by  
 # the Free Software Foundation; either version 2 of the License, or  
 # (at your option) any later version.  
 #  
 # LON-CAPA is distributed in the hope that it will be useful,  
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  
 # GNU General Public License for more details.  
 #  
 # You should have received a copy of the GNU General Public License  
 # along with LON-CAPA; if not, write to the Free Software  
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  
 #  
 # /home/httpd/html/adm/gpl.txt  
 #  
 # http://www.lon-capa.org/  
 #  
 package localenroll;  package localenroll;
   
 use strict;  use strict;
 use DBI;  
 use LONCAPA::Configuration;  ################################
   # sub fetch_enrollment
   #
   # connects to the institutional classlist data source,
   # reads classlist data and stores in an XML file
   # in /home/httpd/perl/tmp/
   #
   # classlist files are named as follows:
   #
   # DOMAIN_COURSE_INSTITUTIONALCODE_classlist.xml
   #
   # e.g., msu_43551dedcd43febmsul1_fs03nop590001_classlist.xml
   # where DOMAIN = msu  COURSE = 43551dedcd43febmsul1 
   # INSTITUTIONALCODE = fs03nop590001 
   # (MSU's course naming scheme - fs03 = Fall semester 2003, nop =
   # department name, 590 = course number, 001 = section number.
   #
   # fetch_enrollment requires three arguments -
   # $dom - DOMAIN e.g., msu
   # $affiliatesref - a reference to a hash of arrays that contains LON-CAPA 
   # courses that are to be updated as keys, and institutional coursecodes 
   # contributing enrollment to that LON-CAPA course as elements in each array.
   # $replyref - a reference to a hash that contains LON-CAPA courses
   # that are to be updated as keys, and the total enrollment count in all 
   # affiliated sections, as determined from institutional data as hash elements. 
   #
   # As an example, if fetch_enrollment is called to retrieve institutional
   # classlists for a single LON-CAPA course - 43551dedcd43febmsul1 which 
   # corresponds to fs03nop590, sections 001, 601 and 602 , and the course
   # also accommodates enrollment from a crosslisted course in the ost
   # department - fs03ost580002:
   #
   # the affiliatesref would be a reference to %affiliates which would be:
   #
   # @{$affiliates{'43551dedcd43febmsul1'}} =
   #   ("fs03nop590001","fs03nop590601","fs03nop590602","fs03ost580002");
   #
   # fetch_enrollment would create four files in /home/httpd/perl/tmp/.
   # msu_43551dedcd43febmsul1_fs03nop590001_classlist.xml
   # msu_43551dedcd43febmsul1_fs03nop590601_classlist.xml
   # msu_43551dedcd43febmsul1_fs03nop590602_classlist.xml
   # msu_43551dedcd43febmsul1_fs03ost580002_classlist.xml
   #
   # In each file, student data would be stored in the following format
   # 
   # <student username="smith">
   #  <autharg>MSU.EDU</autharg>
   #  <authtype>krb4</authtype>
   #  <email>smith@msu.edu</email>
   #  <enddate></enddate>
   #  <firstname>John</firstname>
   #  <generation>II</generation>
   #  <groupID>fs03nop590001</groupID>
   #  <lastname>Smith</lastname>
   #  <middlename>D</middlename>
   #  <startdate></startdate>
   #  <studentID>A12345678</studentID>
   # </student>
   # 
   # with the following at the top of the file
   #<?xml version="1.0" encoding="UTF-8"?>
   #<!DOCTYPE text>
   #<students>
   #
   # (all comment - #s removed)
   #
   # and a closing:
   #</students>
   #
   # The <startdate> and the <enddate> are the activation date and expiration date
   # for this student's role. If they are absent, then the date set for
   # first automated enrollment is used as the default activation date, and the
   # date set for last automated enrollment is used as the default expiration date.
   # If dates are to included in the XML file, they should be in the format
   # YYYY:MM:DD:HH:MM:SS (: separators required).
   #
   # If there were 10 students in fs03nop590001, 5 students in fs03nop59o601, 
   # 8 students in fs03nop590602, and 2 students in fs03ost580002,
   # then $$reply{'43551dedcd43febmsul1'} = 25
   #
   # The purpose of the %reply hash is to detect cases where the institutional 
   # enrollment is 0 (most likely due to a problem with the data source).
   # In such a case, the LON-CAPA course roster is left unchanged (i.e., no
   # students are expired, even if automated drops is enabled.
   # 
   # fetch_enrollment should return a 0 or 1, depending on whether a connection
   # could be established to the institutional data source.
   # 0 is returned if no connection could be made.
   # 1 is returned if connection was successful
   #
   # A return of 1 is required for the calling modules to perform LON-CAPA
   # roster changes based on the contents of the XML classlist file(s), e,g,,
   # msu_43551dedcd43febmsul1_fs03nop590001_classlist.xml
   #
   # XML classlist files are temporary. They are deleted after the enrollment 
   # update process in the calling module is complete.
   #
   ################################
   
 sub fetch_enrollment {  sub fetch_enrollment {
   my ($dom,$affiliatesref,$replyref) = @_;    my ($dom,$affiliatesref,$replyref) = @_;
   $ENV{SYBASE} = '/usr/local/freetds';  
   
   my $DB_PATH = "dbi:Sybase:server=ESDB1;database=RO_ClassList";  
   my $DB_USER =""; # Not stored in CVS  
   my $DB_PASSWD = ""; # Not stored in CVS  
   
   my $configvars = &LONCAPA::Configuration::read_conf('loncapa.conf');  
   
   my $dbh= DBI->connect($DB_PATH,$DB_USER,$DB_PASSWD);  
   my $dbflag = 0;  
   if (defined $dbh) {  
      $dbflag = 1;   
      foreach my $crs (sort keys %{$affiliatesref}) {       foreach my $crs (sort keys %{$affiliatesref}) {
          my $xmlstem =  $$configvars{'lonDaemons'}."/tmp/".$dom."_".$crs."_";           $$replyref{$crs} = 0;
          $$replyref{$crs} = &write_class_data ($dbh,$xmlstem,\@{$$affiliatesref{$crs}});  
      }       }
      $dbh->disconnect;  
   }    }
   return $dbflag;    my $okflag = 0;
     return $okflag;
 }  }
   
 sub write_class_data {  ###############################
   my ($dbh,$xmlstem,$coursesref) = @_;  # sub get_sections
   my $stucount = 0;  #
   foreach my $class (@{$coursesref}) {  # This is called by the Automated Enrollment Manager interface
       if ($class =~ m/^([suf]s\d{2})(\w{2,3})(\d{3,4}\w?)(\d{3})$/) {  # (lonpopulate.pm) to create an array of valid sections for 
           my $xmlfile = $xmlstem.$class."_classlist.xml";  # a specific institutional coursecode.
           open(FILE, ">$xmlfile");  # e.g., for MSU coursecode: fs03nop590
           print FILE qq|<?xml version="1.0" encoding="UTF-8"?>  # ("001","601","602") would be returned
 <!DOCTYPE text>  #
 <students>  # If the array returned contains at least one element, then 
 |;  # the interface offerred to the course coordinator, lists
   # official sections and provides a checkbox to use to
           my $sth = $dbh->prepare("SELECT Pid,Pilot_Id,Student_Name FROM LONCAPA_ClassList WHERE Term_Code = '$1' AND Subj_Code = '$2' AND Crse_Code = '$3' AND Sctn_Code = '$4'  ORDER BY Student_Name");  # select enrollment in the LON-CAPA course from each official section.  
           $sth->execute();  #
           while ( my($pid,$pilot,$name)  = $sth->fetchrow_array ) {  # get_sections requires one argument - the instituional coursecode
               $stucount ++;  # (in the MSU case this is a concatenation of semester code, department
               $name =~ s/^\s//g;  # and course number). 
               $name =~ s/\s$//g;  # 
               my ($last,$given,$first,$middle);  # If there is no access to official course sections at your institution,
               $last = substr($name,0,index($name,","));  # then an empty array is returned, and the Automated Enrollment Manager
               $given = substr($name,index($name,",")+1);  # interface will allow the course coordinator to enter section numbers
               $given =~ s/^\s//g;  # in text boxes.
               if ($given =~ m/\w\s\w/) {  # 
                   $first = substr($given,0,index($given," "));  ################################ 
                   $middle = substr($given,index($given," ")+1);  
                   $middle =~ s/\s//g;  
               } else {  
                   $first = $given;  
               }  
               $first =~ s/\s$//g;  
               print FILE qq| <student username="$pilot">  
   <autharg>MSU.EDU</autharg>  
   <authtype>krb4</authtype>  
   <email>$pilot\@msu.edu</email>  
   <enddate></enddate>  
   <firstname>$first</firstname>  
   <generation></generation>  
   <groupID>$class</groupID>  
   <lastname>$last</lastname>  
   <middlename>$middle</middlename>  
   <startdate></startdate>  
   <studentID>$pid</studentID>  
  </student>  
 |;  
 # Format for startdate is YYYY:MM:DD:HH:MM:SS  
 # Format forenddate is YYYY:MM:DD:HH:MM:SS  
 # Authentication is one of: krb4, krb5, int or loc  
 # Password is either the password for int, or Kerberos domain (for krb4 or krb5), or argument (for loc).  
 # If authentication, password, startdate or enddate are blank, the default for the course is used.  These defaults can be modified using the Automated Enrollment Manager.  
           }  
           $sth->finish;  
           print FILE qq|</students>|;  
           close(FILE);  
       }  
   }  
   return $stucount;  
 }  
   
 sub get_sections {  sub get_sections {
       my $coursecode = shift;
       my @secs = ();
       return @secs;
   }
   
   ###############################
   # sub new_course
   #
   # This is called by loncreatecourse.pm and 
   # lonpopulate.pm to record that fact that a new course section
   # has been added to LON-CAPA that requires access to institutional data
   # At MSU, this is required, as institutional classlists can only made
   # available to faculty who are officially assigned to a course
   # 
   # The new_course subroutine is used to check that the course owner
   # of the LON-CAPA course is permitted to access the institutional
   # classlist for any course sections and crosslisted classes that
   # the course coordinator wishes to have affiliated with the course.
   # 
   # If access is permitted, then 'ok' is returned.
   # The course section or crosslisted course will only be added to the list of
   # affiliates if 'ok' is returned.
   #
   # new_course requires two arguments -
   # the institutional courseID (in the MSU case this is a concatenation of 
   # semester code, department code, course number, and section number
   # e.g., fs03nop590001).
   # the course owner. This is the LON-CAPA username of the course coordinator 
   # assigned to the course when it is first created.
   #
   #################################
   
   sub new_course  {
       my ($course_id,$owner) = @_;
       my $outcome = 'ok';
       return $outcome;
   }
   
   ###############################
   # sub validate_courseID
   #
   # This is called whenever a new course section or crosslisted course
   # is being affiliated with a LON-CAPA course (i.e., by loncreatecourse.pm
   # and the Automated Enrollment Manager in lonpopulate.pm).
   # A check is made that the courseID that the course coordinator wishes
   # to affiliate with the course is valid according to the institutional
   # schedule of official classes 
   #
   # A valid courseID is confirmed by returning 'ok'
   #
   # validate_courseID requires one argument -
   # the institutional courseID (in the MSU case this is a concatenation of
   # semester code, department code, course number, and section number
   # e.g., fs03nop590001).
   #
   ###############################  
   
   sub validate_courseID {
       my $course_id = shift;
       my $outcome = 'ok';
       return $outcome;   
   }
   
   ###############################
   # sub create_password 
   #
   # This is called when the authentication method set for the automated 
   # enrollment process when enrolling new users in the domain is "local".
   # This could be signalled for the specific user by the value of local
   # for the <authtype> tag from the classlist.xml files, or if this is blank,
   # the default authtype, set by the domain coordinator when creating the course
   # with loncreatecourse.pm.
   # 
   # create_password requires one argument -
   # the value of <autharg> from the classlist.xml files, or if this is blank,
   # the default autharg, set by the domain coordinator when creating the course
   # with loncreatecourse.pm.  
   #
   # Three values are returned:
   # (a) the value of $authparam - which might have been changed
   # (b) a flag to indicate whether a password had been created
   # 0 means no password created
   # 1 means password created.  In this case the calling module - Enrollment.pm
   # will send the LON-CAPA username and passwod to the new user's e-mail
   # (if one was provided), or to the course owner (if one was not provided and
   # the new user was created by the automated process), or to the active
   # course coordinator (if the new user was created using the 'update roster
   # now' interface included in the Automated Enrollment Manager.  
   # (c) a flag to indicate that the authentication method is correct - 'ok'.
   # If $authchk is not set to 'ok' then account creation and enrollment of the 
   # new user will not occur.
   #    
   ###############################
   
   sub create_password {
       my $authparam = shift;
       my $authchk = 'ok';
       my $create_passwd = 0;
       return ($authparam,$create_passwd,$authchk);
 }  }
   
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  Added in v.1.4

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