# The LearningOnline Network with CAPA
# The LON-CAPA group sort handler
# Allows for sorting prior to import into RAT.
#
# $Id: groupsort.pm,v 1.33 2005/06/09 22:06:09 www Exp $
#
# 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 Apache::groupsort;
use strict;
use Apache::Constants qw(:common);
use GDBM_File;
use Apache::loncommon;
use Apache::lonlocal;
use Apache::lonnet;
my $iconpath; # variable to be accessible to multiple subroutines
my %hash; # variable to tie to user specific database
sub readfromdb {
my ($r,$shash,$thash)=@_;
my $diropendb;
# ------------------------------ which file do we open? Easy if explictly given
if ($env{'form.catalogmode'} eq 'groupsearch') {
$diropendb =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_searchcat.db";
} elsif ($env{'form.catalogmode'} eq 'groupimport') {
$diropendb =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_indexer.db";
} elsif ($env{'form.catalogmode'} eq 'groupsec') {
$diropendb =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_groupsec.db";
} else {
# --------------------- not explicitly given, choose the one most recently used
my @dbfn;
my @dbst;
$dbfn[0] =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_searchcat.db";
$dbst[0]=-1;
if (-e $dbfn[0]) {
$dbst[0]=(stat($dbfn[0]))[9];
}
$dbfn[1] =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_indexer.db";
$dbst[1]=-1;
if (-e $dbfn[1]) {
$dbst[1]=(stat($dbfn[1]))[9];
}
$dbfn[2] =
"/home/httpd/perl/tmp/$env{'user.domain'}_$env{'user.name'}_groupsec.db";
$dbst[2]=-1;
if (-e $dbfn[2]) {
$dbst[2]=(stat($dbfn[2]))[9];
}
# Expand here for more modes
# ....
# Okay, find most recent existing
my $newest=0;
$diropendb='';
for (my $i=0; $i<=$#dbfn; $i++) {
if ($dbst[$i]>$newest) {
$newest=$dbst[$i];
$diropendb=$dbfn[$i];
}
}
}
# ----------------------------- diropendb is now the filename of the db to open
if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
my $acts = $env{'form.acts'};
my @Acts = split(/b/,$acts);
my %ahash;
my %achash;
my $ac = 0;
foreach (@Acts) {
my ($state,$ref) = split(/a/);
$ahash{$ref} = $state;
$achash{$ref} = $ac;
$ac++;
}
foreach (sort {$achash{$a} <=> $achash{$b}} (keys %ahash)) {
my $key = $_;
if ($ahash{$key} eq '1') {
# my $keyz=join("
",keys %hash);
# print "
$key
$keyz".$hash{'pre_'.$key.'_link'}."
\n";
$hash{'store_'.$hash{'pre_'.$key.'_link'}} =
$hash{'pre_'.$key.'_title'};
$hash{'storectr_'.$hash{'pre_'.$key.'_link'}} =
$hash{'storectr'}+0;
$hash{'storectr'}++;
}
if ($ahash{$key} eq '0') {
if ($hash{'store_'.$hash{'pre_'.$key.'_link'}}) {
delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
}
}
}
foreach (keys %hash) {
if ($_ =~ /^store_/) {
my $key = $_;
$key =~ s/^store_//;
$$shash{$key} = $hash{'storectr_'.$key};
if (&Apache::lonnet::gettitle($key) eq '') {
$$thash{$key} = $hash{'store_'.$key};
} else {
$$thash{$key} = &Apache::lonnet::gettitle($key);
}
}
}
if ($env{'form.oldval'}) {
my $newctr = 0;
my %chash;
foreach (sort {$$shash{$a} <=> $$shash{$b}} (keys %{$shash})) {
my $key = $_;
$newctr++;
$$shash{$key} = $newctr;
$hash{'storectr_'.$key} = $newctr;
$chash{$newctr} = $key;
}
my $oldval = $env{'form.oldval'};
my $newval = $env{'form.newval'};
if ($oldval != $newval) {
# when newval==0, then push down and delete
if ($newval!=0) {
$$shash{$chash{$oldval}} = $newval;
$hash{'storectr_'.$chash{$oldval}} = $newval;
} else {
$$shash{$chash{$oldval}} = $newctr;
$hash{'storectr_'.$chash{$oldval}} = $newctr;
}
if ($newval==0) { # push down
my $newval2=$newctr;
for my $idx ($oldval..($newval2-1)) {
$$shash{$chash{$idx+1}} = $idx;
$hash{'storectr_'.$chash{$idx+1}} = $idx;
}
delete $$shash{$chash{$oldval}};
delete $hash{'storectr_'.$chash{$oldval}};
delete $hash{'store_'.$chash{$oldval}};
} elsif ($oldval < $newval) { # push down
for my $idx ($oldval..($newval-1)) {
$$shash{$chash{$idx+1}} = $idx;
$hash{'storectr_'.$chash{$idx+1}} = $idx;
}
} elsif ($oldval > $newval) { # push up
for my $idx (reverse($newval..($oldval-1))) {
$$shash{$chash{$idx}} = $idx+1;
$hash{'storectr_'.$chash{$idx}} = $idx+1;
}
}
}
}
} else {
$r->print('Unable to tie hash to db file