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 = $VERSION = do { my @v = '$Revision$' =~ /\d+/g;
    shift(@v) . "." . join("_", map {sprintf "%03d", $_ } @v); };;

=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 &getcredits);

=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,$accountno)=@_;
        my $dbh = C4::Context->dbh;
        if ($branch eq ''){
                $branch=$env->{'branchcode'};
        }
        my $user = $env->{'usercode'};
        my $organisation = $env->{'organisation'};
        print $borrowernumber;
        # FIXME - Use $dbh->do() instead
        my $sth=$dbh->prepare("Insert into statistics (datetime,branch,type,usercode,value,
                                        other,itemnumber,itemtype,borrowernumber,proccode,associatedborrower) values (now(),?,?,?,?,?,?,?,?,?,?)");
        $sth->execute($branch,$type,$user,$amount,$other,$itemnum,$itemtype,$borrowernumber,$accountno,$organisation);
        $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();
        # $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,$accountno)=@_;
        my $dbh = C4::Context->dbh;
        my $timestamp2=$timestamp-1;
        my $query="";
        my $sth;

        # getcharges is now taking accountno. as an argument
        if ($accountno){
              $sth=$dbh->prepare("Select * from accountlines where borrowernumber=?
              and accountno = ?");
              $sth->execute($borrowerno,$accountno);

        # this bit left in for old 2 arg usage of getcharges
        } else {
              $sth=$dbh->prepare("Select * from accountlines where borrowernumber=?
              and timestamp = ? and accounttype <> 'Pay' and
              accounttype <> 'W'");
              $sth->execute($borrowerno,$timestamp);
        }

        #  print $query,"<br>";
        my $i=0;
        my @results;
        while (my $data=$sth->fetchrow_hashref){
        #    if ($data->{'timestamp'} == $timestamp){
                $results[$i]=$data;
                $i++;
        #    }
        }
        return(@results);
}

# Otherwise, it needs a POD.
sub getcredits{
        my ($date,$date2)=@_;
        my $dbh = C4::Context->dbh;

        #takes date converts to timestamps
        my $padding="000000";
        (my $a, my $b, my $c) =  unpack("A4 x1 A2 x1 A2", $date);
        (my $x, my $y, my $z) =  unpack("A4 x1 A2 x1 A2", $date2);
        my $timestamp = $a.$b.$c.$padding;
        my $timestamp2 = $x.$y.$z.$padding;

        my $sth=$dbh->prepare("Select * from accountlines,borrowers where (((accounttype = 'LR')  or (accounttype <> 'Pay'))
                                   and amount < 0  and accountlines.borrowernumber = borrowers.borrowernumber
                                   and timestamp >=?  and timestamp <?)");
        $sth->execute($timestamp, $timestamp2);

        my $i=0;
        my @results;
        while (my $data=$sth->fetchrow_hashref){
                $results[$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' or
	    found is NULL) 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' or found is NULL) 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