package C4::Stats;

# $Id$

# Copyright 2000-2002 Katipo Communications
#
# This file is part of Koha.
#
# Koha 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.
#
# Koha 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
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
require Exporter;
use DBI;
use C4::Context;
use vars qw($VERSION @ISA @EXPORT);

# set the version for version checking
$VERSION = 0.01;

=head1 NAME

C4::Stats - Update Koha statistics (log)

=head1 SYNOPSIS

  use C4::Stats;

=head1 DESCRIPTION

The C<&UpdateStats> function adds an entry to the statistics table in
the Koha database, which acts as an activity log.

=head1 FUNCTIONS

=over 2

=cut

@ISA = qw(Exporter);
@EXPORT = qw(&UpdateStats &statsreport &TotalOwing
&TotalPaid &getcharges &Getpaidbranch &unfilledreserves);

=item UpdateStats

  &UpdateStats($env, $branch, $type, $value, $other, $itemnumber,
               $itemtype, $borrowernumber);

Adds a line to the statistics table of the Koha database. In effect,
it logs an event.

C<$branch>, C<$type>, C<$value>, C<$other>, C<$itemnumber>,
C<$itemtype>, and C<$borrowernumber> correspond to the fields of the
statistics table in the Koha database.

If C<$branch> is the empty string, the branch code will be taken from
C<$env-E<gt>{branchcode}>.

C<$env-E<gt>{usercode}> specifies the value of the C<usercode> field.

=cut
#'
sub UpdateStats {
	#module to insert stats data into stats table
	my ($env,$branch,$type,$amount,$other,$itemnum,$itemtype,$borrowernumber)=@_;
	my $dbh = C4::Context->dbh;
	if ($branch eq ''){
		$branch=$env->{'branchcode'};
	}
	my $user = $env->{'usercode'};
	# FIXME - Use $dbh->do() instead
	my $sth=$dbh->prepare("Insert into statistics (datetime,branch,type,usercode,value,
					other,itemnumber,itemtype,borrowernumber) values (now(),?,?,?,?,?,?,?,?)");
	$sth->execute($branch,$type,$user,$amount,$other,$itemnum,$itemtype,$borrowernumber);
	$sth->finish;
}

# Otherwise, it'd need a POD.
sub TotalPaid {
	my ($time,$time2)=@_;
	$time2=$time unless $time2;
	my $dbh = C4::Context->dbh;
	my $query="Select * from accountlines,borrowers where (accounttype = 'Pay' or accounttype ='W')
					and accountlines.borrowernumber = borrowers.borrowernumber";
	my @bind = ();
	if ($time eq 'today'){
		$query .= " and date = now()";
	} else {
		$query.=" and date>=? and date<=?";
		@bind = ($time,$time2);
	}
	#  my $query="Select * from statistics,borrowers
	#  where statistics.borrowernumber= borrowers.borrowernumber
	#  and (statistics.type='payment' or statistics.type='writeoff') ";
	#  if ($time eq 'today'){
	#    $query=$query." and datetime = now()";
	#  } else {
	#    $query.=" and datetime > '$time'";
	#  }
	$query.=" order by timestamp";
	#  print $query;
	my $sth=$dbh->prepare($query);
	$sth->execute(@bind);
	my @results;
	my $i=0;
	while (my $data=$sth->fetchrow_hashref){
		$results[$i]=$data;
		$i++;
	}
	$sth->finish;
	#  print $query;
	return(@results);
}

# Otherwise, it needs a POD.
sub getcharges{
	my($borrowerno,$timestamp)=@_;
	my $dbh = C4::Context->dbh;
	my $timestamp2=$timestamp-1;
	my $query="";
	my $sth=$dbh->prepare("Select * from accountlines where borrowernumber=?
	and timestamp = ? and accounttype <> 'Pay' and
	accounttype <> 'W'");
	#  print $query,"<br>";
	$sth->execute($borrowerno,$timestamp);
	my $i=0;
	my @results;
	while (my $data=$sth->fetchrow_hashref){
	#    if ($data->{'timestamp'} == $timestamp){
		$results[$i]=$data;
		$i++;
	#    }
	}
	return(@results);
}

# Otherwise, this needs a POD.
sub Getpaidbranch{
	my($date,$borrno)=@_;
	my $dbh = C4::Context->dbh;
	my $sth=$dbh->prepare("select * from statistics where type='payment' and datetime >? and  borrowernumber=?");
	$sth->execute($date,$borrno);
	#  print $query;
	my $data=$sth->fetchrow_hashref;
	$sth->finish;
	return($data->{'branch'});
}

# FIXME - This is only used in reservereport.pl and reservereport.xls,
# neither of which is used.
# Otherwise, it needs a POD.
sub unfilledreserves {
	my $dbh = C4::Context->dbh;
	my $sth=$dbh->prepare("select *,biblio.title from reserves,reserveconstraints,biblio,borrowers,biblioitems where found <> 'F' and cancellationdate
								is NULL and biblio.biblionumber=reserves.biblionumber and
								reserves.constrainttype='o'
								and (reserves.biblionumber=reserveconstraints.biblionumber
								and reserves.borrowernumber=reserveconstraints.borrowernumber)
								and
								reserves.borrowernumber=borrowers.borrowernumber and
								biblioitems.biblioitemnumber=reserveconstraints.biblioitemnumber order by
								biblio.title,reserves.reservedate");
	$sth->execute;
	my $i=0;
	my @results;
	while (my $data=$sth->fetchrow_hashref){
		$results[$i]=$data;
		$i++;
	}
	$sth->finish;
	$sth=$dbh->prepare("select *,biblio.title from reserves,biblio,borrowers where found <> 'F' and cancellationdate
		is NULL and biblio.biblionumber=reserves.biblionumber and reserves.constrainttype='a' and
		reserves.borrowernumber=borrowers.borrowernumber
		order by
		biblio.title,reserves.reservedate");
	$sth->execute;
	while (my $data=$sth->fetchrow_hashref){
		$results[$i]=$data;
		$i++;
	}
	$sth->finish;
	return($i,\@results);
}

1;
__END__

=back

=head1 AUTHOR

Koha Developement team <info@koha.org>

=cut