Koha/C4/VirtualShelves.pm
Joshua Ferraro 6cdf0832e2 new virtual shelves changes, keyed by biblionumber
Signed-off-by: Chris Cormack <crc@liblime.com>
2007-08-09 09:17:49 -05:00

411 lines
10 KiB
Perl
Executable file

# -*- tab-width: 8 -*-
# Please use 8-character tabs for this file (indents are every 4 characters)
package C4::VirtualShelves;
# $Id$
# 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 C4::Context;
use C4::Circulation;
use vars qw($VERSION @ISA @EXPORT);
# set the version for version checking
$VERSION = do { my @v = '$Revision$' =~ /\d+/g; shift(@v) . "." . join( "_", map { sprintf "%03d", $_ } @v ); };
=head1 NAME
C4::VirtualShelves - Functions for manipulating Koha virtual virtualshelves
=head1 SYNOPSIS
use C4::VirtualShelves;
=head1 DESCRIPTION
This module provides functions for manipulating virtual virtualshelves,
including creating and deleting virtualshelves, and adding and removing
items to and from virtualshelves.
=head1 FUNCTIONS
=over 2
=cut
@ISA = qw(Exporter);
@EXPORT = qw(
&GetShelves &GetShelfContents &GetShelf
&AddToShelf &AddToShelfFromBiblio &AddShelf
&ModShelf
&ShelfPossibleAction
&DelFromShelf &DelShelf
);
my $dbh = C4::Context->dbh;
=item GetShelves
$shelflist = &GetShelves($owner, $mincategory);
($shelfnumber, $shelfhash) = each %{$shelflist};
Looks up the virtual virtualshelves, and returns a summary. C<$shelflist>
is a reference-to-hash. The keys are the virtualshelves numbers
(C<$shelfnumber>, above), and the values (C<$shelfhash>, above) are
themselves references-to-hash, with the following keys:
C<mincategory> : 2 if the list is for "look". 3 if the list is for "Select virtualshelves for adding a virtual".
virtualshelves of the owner are always selected, whatever the category
=over 4
=item C<$shelfhash-E<gt>{shelfname}>
A string. The name of the shelf.
=item C<$shelfhash-E<gt>{count}>
The number of virtuals on that virtualshelves.
=back
=cut
#'
# FIXME - Wouldn't it be more intuitive to return a list, rather than
# a reference-to-hash? The shelf number can be just another key in the
# hash.
sub GetShelves {
my ( $owner, $mincategory ) = @_;
my $query = qq(
SELECT virtualshelves.shelfnumber, virtualshelves.shelfname,owner,surname,firstname,virtualshelves.category,
count(virtualshelfcontents.biblionumber) as count
FROM virtualshelves
LEFT JOIN virtualshelfcontents ON virtualshelves.shelfnumber = virtualshelfcontents.shelfnumber
LEFT JOIN borrowers ON virtualshelves.owner = borrowers.borrowernumber
WHERE owner=? OR category>=?
GROUP BY virtualshelves.shelfnumber
ORDER BY virtualshelves.category, virtualshelves.shelfname, borrowers.firstname, borrowers.surname
);
my $sth = $dbh->prepare($query);
$sth->execute( $owner, $mincategory );
my %shelflist;
while (
my (
$shelfnumber, $shelfname, $owner, $surname,
$firstname, $category, $count
)
= $sth->fetchrow
)
{
$shelflist{$shelfnumber}->{'shelfname'} = $shelfname;
$shelflist{$shelfnumber}->{'count'} = $count;
$shelflist{$shelfnumber}->{'category'} = $category;
$shelflist{$shelfnumber}->{'owner'} = $owner;
$shelflist{$shelfnumber}->{'surname'} = $surname;
$shelflist{$shelfnumber}->{'firstname'} = $firstname;
}
return ( \%shelflist );
}
=item GetShef
(shelfnumber,shelfname,owner,category) = &GetShelf($shelfnumber);
Looks up information about the contents of virtual virtualshelves number
C<$shelfnumber>
Returns the database's information on 'virtualshelves' table.
=cut
sub GetShelf {
my ($shelfnumber) = @_;
my $query = qq(
SELECT shelfnumber,shelfname,owner,category
FROM virtualshelves
WHERE shelfnumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute($shelfnumber);
return $sth->fetchrow;
}
=item GetShelfContents
$itemlist = &GetShelfContents($shelfnumber);
Looks up information about the contents of virtual virtualshelves number
C<$shelfnumber>.
Returns a reference-to-array, whose elements are references-to-hash,
as returned by C<C4::Biblio::GetBiblioFromItemNumber>.
=cut
#'
sub GetShelfContents {
my ( $shelfnumber ) = @_;
my @itemlist;
my $query =
" SELECT biblionumber
FROM virtualshelfcontents
WHERE shelfnumber=?
ORDER BY biblionumber
";
my $sth = $dbh->prepare($query);
$sth->execute($shelfnumber);
my $sth2 = $dbh->prepare("
SELECT biblio.*,biblioitems.* FROM biblio
LEFT JOIN biblioitems on biblio.biblionumber=biblioitems.biblionumber
WHERE biblio.biblionumber=?"
);
while ( my ($biblionumber) = $sth->fetchrow ) {
$sth2->execute($biblionumber);
my $item = $sth2->fetchrow_hashref;
$item->{'biblionumber'}=$biblionumber;
push( @itemlist, $item );
}
return ( \@itemlist );
}
=item AddShelf
$shelfnumber = &AddShelf( $shelfname, $owner, $category);
Creates a new virtual virtualshelves with name C<$shelfname>, owner C<$owner> and category
C<$category>.
Returns a code to know what's happen.
* -1 : if this virtualshelves already exist.
* $shelfnumber : if success.
=cut
sub AddShelf {
my ( $shelfname, $owner, $category ) = @_;
my $query = qq(
SELECT *
FROM virtualshelves
WHERE shelfname=? AND owner=?
);
my $sth = $dbh->prepare($query);
$sth->execute($shelfname,$owner);
if ( $sth->rows ) {
return (-1);
}
else {
my $query = qq(
INSERT INTO virtualshelves
(shelfname,owner,category)
VALUES (?,?,?)
);
$sth = $dbh->prepare($query);
$sth->execute( $shelfname, $owner, $category );
my $shelfnumber = $dbh->{'mysql_insertid'};
return ($shelfnumber);
}
}
=item AddToShelf
&AddToShelf($biblionumber, $shelfnumber);
Adds item number C<$biblionumber> to virtual virtualshelves number
C<$shelfnumber>, unless that item is already on that shelf.
=cut
#'
sub AddToShelf {
my ( $biblionumber, $shelfnumber ) = @_;
return unless $biblionumber;
my $query = qq(
SELECT *
FROM virtualshelfcontents
WHERE shelfnumber=? AND biblionumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute( $shelfnumber, $biblionumber );
unless ( $sth->rows ) {
# already on shelf
my $query = qq(
INSERT INTO virtualshelfcontents
(shelfnumber, biblionumber, flags)
VALUES
(?, ?, 0)
);
$sth = $dbh->prepare($query);
$sth->execute( $shelfnumber, $biblionumber );
}
}
=item AddToShelfFromBiblio
&AddToShelfFromBiblio($biblionumber, $shelfnumber)
this function allow to add a virtual into the shelf number $shelfnumber
from biblionumber.
=cut
sub AddToShelfFromBiblio {
my ( $biblionumber, $shelfnumber ) = @_;
return unless $biblionumber;
my $query = qq(
SELECT *
FROM virtualshelfcontents
WHERE shelfnumber=? AND biblionumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute( $shelfnumber, $biblionumber );
unless ( $sth->rows ) {
my $query =qq(
INSERT INTO virtualshelfcontents
(shelfnumber, biblionumber, flags)
VALUES
(?, ?, 0)
);
$sth = $dbh->prepare($query);
$sth->execute( $shelfnumber, $biblionumber );
}
}
=item ModShelf
ModShelf($shelfnumber, $shelfname, $owner, $category )
Modify the value into virtualshelves table with values given on input arg.
=cut
sub ModShelf {
my ( $shelfnumber, $shelfname, $owner, $category ) = @_;
my $query = qq(
UPDATE virtualshelves
SET shelfname=?,owner=?,category=?
WHERE shelfnumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute( $shelfname, $owner, $category, $shelfnumber );
}
=item DelShelf
($status) = &DelShelf($shelfnumber);
Deletes virtual virtualshelves number C<$shelfnumber>. The virtualshelves must
be empty.
Returns a two-element array, where C<$status> is 0 if the operation
was successful, or non-zero otherwise. C<$msg> is "Done" in case of
success, or an error message giving the reason for failure.
=cut
=item ShelfPossibleAction
ShelfPossibleAction($loggedinuser, $shelfnumber, $action);
C<$loggedinuser,$shelfnumber,$action>
$action can be "view" or "manage".
Returns 1 if the user can do the $action in the $shelfnumber shelf.
Returns 0 otherwise.
=cut
sub ShelfPossibleAction {
my ( $user, $shelfnumber, $action ) = @_;
my $query = qq(
SELECT owner,category
FROM virtualshelves
WHERE shelfnumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute($shelfnumber);
my ( $owner, $category ) = $sth->fetchrow;
return 1 if (($category >= 3 or $owner eq $user) && $action eq 'manage' );
return 1 if (($category >= 2 or $owner eq $user) && $action eq 'view' );
return 0;
}
=item DelFromShelf
&DelFromShelf( $biblionumber, $shelfnumber);
Removes item number C<$biblionumber> from virtual virtualshelves number
C<$shelfnumber>. If the item wasn't on that virtualshelves to begin with,
nothing happens.
=cut
#'
sub DelFromShelf {
my ( $biblionumber, $shelfnumber ) = @_;
my $query = qq(
DELETE FROM virtualshelfcontents
WHERE shelfnumber=? AND biblionumber=?
);
my $sth = $dbh->prepare($query);
$sth->execute( $shelfnumber, $biblionumber );
}
=head2 DelShelf
$Number = DelShelf($shelfnumber);
this function delete the shelf number, and all of it's content
=cut
#'
sub DelShelf {
my ( $shelfnumber ) = @_;
my $sth = $dbh->prepare("DELETE FROM virtualshelves WHERE shelfnumber=?");
$sth->execute($shelfnumber);
return 0;
}
END { } # module clean-up code here (global destructor)
1;
__END__
=back
=head1 AUTHOR
Koha Developement team <info@koha.org>
=head1 SEE ALSO
C4::Circulation::Circ2(3)
=cut