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419 lines
11 KiB
419 lines
11 KiB
# -*- tab-width: 8 -*-
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# Please use 8-character tabs for this file (indents are every 4 characters)
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package C4::VirtualShelves;
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# Copyright 2000-2002 Katipo Communications
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#
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
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# Suite 330, Boston, MA 02111-1307 USA
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use strict;
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use Carp;
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use C4::Context;
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use C4::Circulation;
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use vars qw($VERSION @ISA @EXPORT);
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BEGIN {
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# set the version for version checking
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$VERSION = 3.01;
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require Exporter;
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&GetShelves &GetShelfContents &GetShelf
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&AddToShelf &AddToShelfFromBiblio &AddShelf
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&ModShelf
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&ShelfPossibleAction
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&DelFromShelf &DelShelf
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);
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}
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my $dbh = C4::Context->dbh;
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=head1 NAME
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C4::VirtualShelves - Functions for manipulating Koha virtual virtualshelves
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=head1 SYNOPSIS
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use C4::VirtualShelves;
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=head1 DESCRIPTION
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This module provides functions for manipulating virtual virtualshelves,
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including creating and deleting virtualshelves, and adding and removing
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items to and from virtualshelves.
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=head1 FUNCTIONS
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=over 2
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=item GetShelves
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$shelflist = &GetShelves($owner, $mincategory);
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($shelfnumber, $shelfhash) = each %{$shelflist};
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Looks up the virtual virtualshelves, and returns a summary. C<$shelflist>
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is a reference-to-hash. The keys are the virtualshelves numbers
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(C<$shelfnumber>, above), and the values (C<$shelfhash>, above) are
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themselves references-to-hash, with the following keys:
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C<mincategory> : 2 if the list is for "look". 3 if the list is for "Select virtualshelves for adding a virtual".
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virtualshelves of the owner are always selected, whatever the category
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=over 4
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=item C<$shelfhash-E<gt>{shelfname}>
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A string. The name of the shelf.
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=item C<$shelfhash-E<gt>{count}>
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The number of virtuals on that virtualshelves.
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=back
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=cut
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#'
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# FIXME - Wouldn't it be more intuitive to return a list, rather than
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# a reference-to-hash? The shelf number can be just another key in the
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# hash.
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sub GetShelves {
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my ( $owner, $mincategory ) = @_;
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my $query = qq(
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SELECT virtualshelves.shelfnumber, virtualshelves.shelfname,owner,surname,firstname,virtualshelves.category,virtualshelves.sortfield,
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count(virtualshelfcontents.biblionumber) as count
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FROM virtualshelves
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LEFT JOIN virtualshelfcontents ON virtualshelves.shelfnumber = virtualshelfcontents.shelfnumber
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LEFT JOIN borrowers ON virtualshelves.owner = borrowers.borrowernumber
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WHERE owner=? OR category>=?
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GROUP BY virtualshelves.shelfnumber
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ORDER BY virtualshelves.category, virtualshelves.shelfname, borrowers.firstname, borrowers.surname
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);
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my $sth = $dbh->prepare($query);
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$sth->execute( $owner, $mincategory );
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my %shelflist;
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while (
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my (
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$shelfnumber, $shelfname, $owner, $surname,
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$firstname, $category, $sortfield, $count
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)
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= $sth->fetchrow
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)
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{
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$shelflist{$shelfnumber}->{'shelfname'} = $shelfname;
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$shelflist{$shelfnumber}->{'count'} = $count;
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$shelflist{$shelfnumber}->{'sortfield'} = $sortfield;
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$shelflist{$shelfnumber}->{'category'} = $category;
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$shelflist{$shelfnumber}->{'owner'} = $owner;
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$shelflist{$shelfnumber}->{'surname'} = $surname;
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$shelflist{$shelfnumber}->{'firstname'} = $firstname;
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}
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return ( \%shelflist );
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}
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=item GetShelf
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(shelfnumber,shelfname,owner,category) = &GetShelf($shelfnumber);
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Looks up information about the contents of virtual virtualshelves number
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C<$shelfnumber>
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Returns the database's information on 'virtualshelves' table.
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=cut
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sub GetShelf {
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my ($shelfnumber) = @_;
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my $query = qq(
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SELECT shelfnumber,shelfname,owner,category,sortfield
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FROM virtualshelves
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WHERE shelfnumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute($shelfnumber);
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return $sth->fetchrow;
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}
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=item GetShelfContents
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$itemlist = &GetShelfContents($shelfnumber);
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Looks up information about the contents of virtual virtualshelves number
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C<$shelfnumber>. Sorted by a field in the biblio table. copyrightdate
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gives a desc sort.
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Returns a reference-to-array, whose elements are references-to-hash,
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as returned by C<C4::Biblio::GetBiblioFromItemNumber>.
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Note: the notforloan status comes from the itemtype, and where it equals 0
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it does not ensure that related items.notforloan status is likewise 0. The
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caller has to check any items on their own, possibly with CanBookBeIssued
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from C4::Circulation.
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=cut
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sub GetShelfContents {
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my ( $shelfnumber ,$sortfield) = @_;
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my $dbh=C4::Context->dbh();
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if(!$sortfield) {
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my $sthsort = $dbh->prepare('select sortfield from virtualshelves where shelfnumber=?');
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$sthsort->execute($shelfnumber);
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($sortfield) = $sthsort->fetchrow_array;
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}
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my $query =
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" SELECT vc.biblionumber, vc.shelfnumber,
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biblio.*, biblioitems.itemtype, itemtypes.*
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FROM virtualshelfcontents vc
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LEFT JOIN biblio ON vc.biblionumber = biblio.biblionumber
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LEFT JOIN biblioitems ON biblio.biblionumber = biblioitems.biblionumber
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LEFT JOIN itemtypes ON biblioitems.itemtype = itemtypes.itemtype
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WHERE vc.shelfnumber=? ";
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if($sortfield) {
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$query .= " ORDER BY `$sortfield` ";
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$query .= " DESC " if ($sortfield eq 'copyrightdate');
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}
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my $sth = $dbh->prepare($query);
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$sth->execute($shelfnumber);
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return $sth->fetchall_arrayref({});
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# Like the perldoc says,
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# returns reference-to-array, where each element is reference-to-hash of the row:
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# like [ $sth->fetchrow_hashref(), $sth->fetchrow_hashref() ... ]
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# Suitable for use in TMPL_LOOP.
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# See http://search.cpan.org/~timb/DBI-1.601/DBI.pm#fetchall_arrayref
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# or newer, for your version of DBI.
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}
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=item AddShelf
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$shelfnumber = &AddShelf( $shelfname, $owner, $category);
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Creates a new virtual virtualshelves with name C<$shelfname>, owner C<$owner> and category
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C<$category>.
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Returns a code to know what's happen.
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* -1 : if this virtualshelves already exist.
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* $shelfnumber : if success.
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=cut
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sub AddShelf {
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my ( $shelfname, $owner, $category ) = @_;
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my $query = qq(
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SELECT *
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FROM virtualshelves
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WHERE shelfname=? AND owner=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute($shelfname,$owner);
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( $sth->rows ) and return (-1);
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$query = qq(
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INSERT INTO virtualshelves
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(shelfname,owner,category)
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VALUES (?,?,?)
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);
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$sth = $dbh->prepare($query);
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$sth->execute( $shelfname, $owner, $category );
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my $shelfnumber = $dbh->{'mysql_insertid'};
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return ($shelfnumber);
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}
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=item AddToShelf
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&AddToShelf($biblionumber, $shelfnumber);
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Adds item number C<$biblionumber> to virtual virtualshelves number
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C<$shelfnumber>, unless that item is already on that shelf.
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=cut
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#'
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sub AddToShelf {
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my ( $biblionumber, $shelfnumber ) = @_;
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return unless $biblionumber;
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my $query = qq(
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SELECT *
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FROM virtualshelfcontents
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WHERE shelfnumber=? AND biblionumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute( $shelfnumber, $biblionumber );
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unless ( $sth->rows ) {
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# already on shelf
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my $query = qq(
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INSERT INTO virtualshelfcontents
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(shelfnumber, biblionumber, flags)
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VALUES
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(?, ?, 0)
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);
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$sth = $dbh->prepare($query);
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$sth->execute( $shelfnumber, $biblionumber );
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}
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}
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=item AddToShelfFromBiblio
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&AddToShelfFromBiblio($biblionumber, $shelfnumber)
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this function allow to add a virtual into the shelf number $shelfnumber
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from biblionumber.
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=cut
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sub AddToShelfFromBiblio {
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my ( $biblionumber, $shelfnumber ) = @_;
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return unless $biblionumber;
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my $query = qq(
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SELECT *
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FROM virtualshelfcontents
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WHERE shelfnumber=? AND biblionumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute( $shelfnumber, $biblionumber );
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unless ( $sth->rows ) {
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my $query =qq(
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INSERT INTO virtualshelfcontents
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(shelfnumber, biblionumber, flags)
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VALUES
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(?, ?, 0)
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);
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$sth = $dbh->prepare($query);
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$sth->execute( $shelfnumber, $biblionumber );
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}
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}
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=item ModShelf
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ModShelf($shelfnumber, $shelfname, $owner, $category )
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Modify the value into virtualshelves table with values given on input arg.
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=cut
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sub ModShelf {
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my ( $shelfnumber, $shelfname, $owner, $category, $sortfield ) = @_;
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my $query = qq(
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UPDATE virtualshelves
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SET shelfname=?,owner=?,category=?,sortfield=?
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WHERE shelfnumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute( $shelfname, $owner, $category, $sortfield, $shelfnumber );
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}
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=item DelShelf
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($status) = &DelShelf($shelfnumber);
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Deletes virtual virtualshelves number C<$shelfnumber>. The virtualshelves must
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be empty.
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Returns a two-element array, where C<$status> is 0 if the operation
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was successful, or non-zero otherwise. C<$msg> is "Done" in case of
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success, or an error message giving the reason for failure.
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=cut
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=item ShelfPossibleAction
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ShelfPossibleAction($loggedinuser, $shelfnumber, $action);
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C<$loggedinuser,$shelfnumber,$action>
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$action can be "view" or "manage".
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Returns 1 if the user can do the $action in the $shelfnumber shelf.
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Returns 0 otherwise.
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=cut
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sub ShelfPossibleAction {
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my ( $user, $shelfnumber, $action ) = @_;
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my $query = qq(
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SELECT owner,category
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FROM virtualshelves
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WHERE shelfnumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute($shelfnumber);
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my ( $owner, $category ) = $sth->fetchrow;
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return 1 if ($owner eq $user);
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return 1 if ( $category >= 3);
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return 1 if (($category >= 2) && $action eq 'view' );
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return 0;
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}
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=item DelFromShelf
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&DelFromShelf( $biblionumber, $shelfnumber);
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Removes item number C<$biblionumber> from virtual virtualshelves number
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C<$shelfnumber>. If the item wasn't on that virtualshelves to begin with,
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nothing happens.
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=cut
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#'
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sub DelFromShelf {
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my ( $biblionumber, $shelfnumber ) = @_;
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my $query = qq(
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DELETE FROM virtualshelfcontents
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WHERE shelfnumber=? AND biblionumber=?
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);
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my $sth = $dbh->prepare($query);
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$sth->execute( $shelfnumber, $biblionumber );
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}
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=head2 DelShelf
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$Number = DelShelf($shelfnumber);
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this function delete the shelf number, and all of it's content
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=cut
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#'
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sub DelShelf {
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unless (@_) {
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carp "DelShelf called without valid argument (shelfnumber)";
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return undef;
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}
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my $sth = $dbh->prepare("DELETE FROM virtualshelves WHERE shelfnumber=?");
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return $sth->execute(shift);
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}
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1;
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__END__
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=back
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=head1 AUTHOR
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Koha Developement team <info@koha.org>
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=head1 SEE ALSO
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C4::Circulation::Circ2(3)
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=cut
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