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package C4::Members::Statistics;
# Copyright 2012 BibLibre
# 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 3 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, see <http://www.gnu.org/licenses>.
=head1 NAME
C4::Members::Statistics - Get statistics for patron checkouts
=cut
use Modern::Perl;
use C4::Context;
our ( @ISA, @EXPORT, @EXPORT_OK );
BEGIN {
require Exporter;
@ISA = qw(Exporter);
push @EXPORT, qw(
&GetTotalIssuesTodayByBorrower
&GetTotalIssuesReturnedTodayByBorrower
&GetPrecedentStateByBorrower
);
}
=head2 get_fields
Get fields form syspref 'StatisticsFields'
Returns list of valid fields, defaults to 'location|itype|ccode'
if syspref is empty or does not contain valid fields
=cut
sub get_fields {
my $syspref = C4::Context->preference('StatisticsFields');
my $ret;
if ( $syspref ) {
my @ret;
my @spfields = split ('\|', $syspref);
my $schema = Koha::Database->new()->schema();
my @columns = $schema->source('Item')->columns;
foreach my $fn ( @spfields ) {
push ( @ret, $fn ) if ( grep { $_ eq $fn } @columns );
}
$ret = join( '|', @ret);
}
return $ret || 'location|itype|ccode';
}
=head2 construct_query
Build a sql query from a subquery
Adds statistics fields to the select and the group by clause
=cut
sub construct_query {
my $count = shift;
my $subquery = shift;
my $fields = get_fields();
my @select_fields = split '\|', $fields;
my $query = "SELECT COUNT(*) as count_$count,";
$query .= join ',', @select_fields;
$query .= " " . $subquery;
$fields =~ s/\|/,/g;
$query .= " GROUP BY $fields;";
return $query;
}
=head2 GetTotalIssuesTodayByBorrower
Return total issues for a borrower at this current day
=cut
sub GetTotalIssuesTodayByBorrower {
my ($borrowernumber) = @_;
my $dbh = C4::Context->dbh;
my $query = construct_query "total_issues_today",
"FROM (
SELECT it.* FROM issues i, items it WHERE i.itemnumber = it.itemnumber AND i.borrowernumber = ? AND DATE(i.issuedate) = CAST(now() AS date)
UNION
SELECT it.* FROM old_issues oi, items it WHERE oi.itemnumber = it.itemnumber AND oi.borrowernumber = ? AND DATE(oi.issuedate) = CAST(now() AS date)
) tmp"; # alias is required by MySQL
my $sth = $dbh->prepare($query);
$sth->execute($borrowernumber, $borrowernumber);
return $sth->fetchall_arrayref( {} );
}
=head2 GetTotalIssuesReturnedTodayByBorrower
Return total issues returned by a borrower at this current day
=cut
sub GetTotalIssuesReturnedTodayByBorrower {
my ($borrowernumber) = @_;
my $dbh = C4::Context->dbh;
my $query = construct_query "total_issues_returned_today", "FROM old_issues i, items it WHERE i.itemnumber = it.itemnumber AND i.borrowernumber = ? AND DATE(i.returndate) = CAST(now() AS date) ";
my $sth = $dbh->prepare($query);
$sth->execute($borrowernumber);
return $sth->fetchall_arrayref( {} );
}
=head2 GetPrecedentStateByBorrower
Return the precedent state (before today) for a borrower of his checkins and checkouts
=cut
sub GetPrecedentStateByBorrower {
my ($borrowernumber) = @_;
my $dbh = C4::Context->dbh;
my $query = construct_query "precedent_state",
"FROM (
SELECT it.* FROM issues i, items it WHERE i.borrowernumber = ? AND i.itemnumber = it.itemnumber AND DATE(i.issuedate) < CAST(now() AS date)
UNION
SELECT it.* FROM old_issues oi, items it WHERE oi.borrowernumber = ? AND oi.itemnumber = it.itemnumber AND DATE(oi.issuedate) < CAST(now() AS date) AND DATE(oi.returndate) = CAST(now() AS date)
) tmp"; # alias is required by MySQL
my $sth = $dbh->prepare($query);
$sth->execute($borrowernumber, $borrowernumber);
return $sth->fetchall_arrayref( {});
}
1;