#!/usr/bin/perl

    use strict;
    use lib '/home/httpd/lib/perl';
    use localenroll;
    use LONCAPA::Configuration;
    use LONCAPA::Enrollment;
    use Apache::lonnet;
    use Apache::loncoursedata;
    use Apache::lonmsg;
    use HTML::Entities;

# Determine the library server's domain
    my $perlvarref = LONCAPA::Configuration::read_conf('loncapa.conf');
    my $dom = $$perlvarref{'lonDefDomain'};
    my $tmpdir = $$perlvarref{'lonDaemons'}.'/tmp';
    $ENV{'user.domain'} = $dom;

# Determine the present time;
    my $timenow = time();

# Determine the courses
    my %courses = &Apache::lonnet::courseiddump($dom,'.',1); 
    my %affiliates = ();
    my %enrollvar = ();
    my %logmsg = ();
    my %reply = ();
    my %LC_code = ();
    foreach my $key (sort keys %courses) {
        my $crs;
        if ($key =~ m/^($dom)_(\w+)$/) {
            $crs = $2;
        }

# Get course settings
        my %settings = &Apache::lonnet::dump('environment',$dom,$crs);
        %{$enrollvar{$crs}} = ();
        @{$affiliates{$crs}} = ();
        %{$LC_code{$crs}} = ();
        foreach my $item (keys %settings) {
            if ($item =~ m/^internal\.(.+)$/) {
                $enrollvar{$crs}{$1} = $settings{$item};
            } elsif ($item eq 'description') {
                $enrollvar{$crs}{$item} = &HTML::Entities::decode($settings{$item});  
            }
        }
        if (($enrollvar{$crs}{autostart} <= $timenow) && ($enrollvar{$crs}{autoend} > $timenow)) {
            if ( ($enrollvar{$crs}{autoadds} == 1) || ($enrollvar{$crs}{autodrops} == 1) ) {
# Add to list of classes for retrieval
                $enrollvar{$crs}{sectionnums} =~ s/ //g;
                $enrollvar{$crs}{crosslistings} =~ s/ //g;
                my @sections = ();
                my @crosslistings = ();
                if ($enrollvar{$crs}{sectionnums} =~ m/,/) {
                    @sections = split/,/,$enrollvar{$crs}{sectionnums};
                } else {
                    $sections[0] = $enrollvar{$crs}{sectionnums};
                }
                if ($enrollvar{$crs}{crosslistings} =~ m/,/) {
                    @crosslistings = split/,/,$enrollvar{$crs}{crosslistings}
                } else {
                    @crosslistings = $enrollvar{$crs}{crosslistings};
                }
                foreach my $sec (@sections) {
                    if ($sec =~ m/^(\w+):(\w*)$/ ) {
                        my $course_id = $enrollvar{$crs}{coursecode}.$1;
                        my $gp = $2;
                        if (!grep/^$course_id$/,@{$affiliates{$crs}}) {
                            push @{$affiliates{$crs}}, $course_id;
                            $LC_code{$crs}{$course_id} = $gp; 
                        }
                    }
                }
                foreach my $xlist (@crosslistings) {
                    if ($xlist =~ m/^(\w+):(\w*)$/) {
                        my $course_id = $1;
                        my $gp = $2;
                        if (!grep/^$course_id$/,@{$affiliates{$crs}}) {
                            push @{$affiliates{$crs}}, $course_id;
                            $LC_code{$crs}{$course_id} = $gp;
                        }
                    }
                }
            }
        }
    }
    &localenroll::fetch_enrollment($dom,\%affiliates,\%reply);

# Now go through classes and perform required enrollment changes.
    foreach my $crs (sort keys %enrollvar) {
        if ($reply{$crs} > 0) {
            if (($enrollvar{$crs}{autostart} < $timenow) && ($enrollvar{$crs}{autoend} > $timenow)) {
                if (($enrollvar{$crs}{autoadds} == 1) || ($enrollvar{$crs}{autodrops} == 1)) {
                    my ($changecount,$response) = &LONCAPA::Enrollment::update_LC($dom,$crs,$enrollvar{$crs}{autoadds},$enrollvar{$crs}{autodrops},$enrollvar{$crs}{startdate},$enrollvar{$crs}{enddate},$enrollvar{$crs}{authtype},$enrollvar{$crs}{autharg},\@{$affiliates{$crs}},\%{$LC_code{$crs}},\$logmsg{$crs},'automated');
                    my $logfile = $crs."_enrollment_log.txt";
                    open (FILE,">>$tmpdir/$logfile");
                    print FILE "********************\n".localtime(time)." Enrollment messages start --\n";
                    print FILE "$logmsg{$crs}\n";
                    print FILE "-- ".localtime(time)." Enrollment messages end\n********************\n\n"; 
                    close (FILE);
                    if ($changecount > 0) {
                        unless ($enrollvar{$crs}{notifylist}  eq '') {
# Send message about enrollment changes to notifylist.
# Set $ENV{'user.name'}, $ENV{'user.home'} for use by logging in lonmsg
                            unless ( ($enrollvar{$crs}{'courseowner'} eq '') || (!defined($enrollvar{$crs}{'courseowner'}) )  ) {
                                $ENV{'user.name'} = $enrollvar{$crs}{'courseowner'};
                                $ENV{'user.home'} = &Apache::lonnet::homeserver($ENV{'user.name'},$dom);

                                my $subject = "Student enrollment changes in $enrollvar{$crs}{coursecode}";
                                my $message = "The following $changecount change(s) occurred in $enrollvar{$crs}{description} - $enrollvar{$crs}{coursecode} as a result of the automated classlist update:\n\n".$response;
                                my @to_notify = ();
                                if ($enrollvar{$crs}{notifylist} =~ m/,/) {
                                    @to_notify = split/,/,$enrollvar{$crs}{notifylist};
                                } else {
                                    $to_notify[0] = $enrollvar{$crs}{notifylist};
                                }
                                foreach my $cc (@to_notify) {
                                    my ($ccname,$ccdom) = split/@/,$cc;
                                    my $status =  &Apache::lonmsg::user_normal_msg($ccname,$ccdom,$subject,$message);
                                }
                                delete($ENV{'user.name'});
                                delete($ENV{'user.home'});
                            }
                        }
                    }
                }
            }
        } else {
            print STDERR "No institutional classlist data could be retrieved for $crs\n";
        }
    }
    delete($ENV{'user.domain'});

# Check for photos

1;
