[Koha-patches] [PATCH] bug_7458: call number plugin

[Melia Meggs]

From: Srdjan Jankovic <srdjan at catalyst.net.nz>

Signed-off-by: Melia Meggs <melia at test.bywatersolutions.com>
This patch is a call number plugin that generates the next available call number. After typing in an appropriate three or four letter prefix, followed by one or two numbers in subfield o - Full Call Number on the Add Item screen, this plugin will generate the next available call number with that prefix that is not yet in use.
---
 cataloguing/value_builder/callnumber-KU.pl |  127 ++++++++++++++++++++++++++++
 1 files changed, 127 insertions(+), 0 deletions(-)
 create mode 100755 cataloguing/value_builder/callnumber-KU.pl

diff --git a/cataloguing/value_builder/callnumber-KU.pl b/cataloguing/value_builder/callnumber-KU.pl
new file mode 100755
index 0000000..885026f
--- /dev/null
+++ b/cataloguing/value_builder/callnumber-KU.pl
@@ -0,0 +1,127 @@
+#!/usr/bin/perl
+
+# Copyright 2010 BibLibre SARL
+#
+# 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.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+use strict;
+use warnings;
+use C4::Auth;
+use CGI;
+use C4::Context;
+
+=head1 DESCRIPTION
+
+Is used for callnumber computation.
+
+User must supply a letter prefix (unspecified length) followed by an empty space followed by a "number".
+"Number" is i4 character long, and is either a number sequence which is 0 padded
+or two letters which are 01 padded.
+If input does not conform with this format any processing is omitted.
+
+Some examples of legal values that trigger auto allocation:
+
+AAA 0  - returns largest number AAA 0xxx incremented by 1 or AAA 0000
+BBB 12 - returns largest number BBB 12xx incremented by 1 or BBB 1200
+CCC QW - returns largest number CCC QWxx incremented by 1 or CCC QW01
+
+=cut
+
+sub plugin_parameters {
+}
+
+sub plugin_javascript {
+    my ($dbh,$record,$tagslib,$field_number,$tabloop) = @_;
+    my $res="
+    <script type='text/javascript'>
+        function Focus$field_number() {
+            return 1;
+        }
+
+        function Blur$field_number() {
+                return 1;
+        }
+
+        function Clic$field_number() {
+                var code = document.getElementById('$field_number');
+                var url = '../cataloguing/plugin_launcher.pl?plugin_name=callnumber-KU.pl&code=' + code.value;
+                var blurcallbackcallnumber = {
+                    success: function(o) {
+                        var field = document.getElementById('$field_number');
+                        field.value = o.responseText;
+                        return 1;
+                    }
+                }
+                var transaction = YAHOO.util.Connect.asyncRequest('GET',url, blurcallbackcallnumber, null);
+            return 1;
+        }
+    </script>
+    ";
+
+    return ($field_number,$res);
+}
+
+my $BASE_CALLNUMBER_RE = qr/^(\w+) (\w+)$/;
+sub plugin {
+    my ($input) = @_;
+    my $code = $input->param('code');
+
+    my ($template, $loggedinuser, $cookie) = get_template_and_user({
+        template_name   => "cataloguing/value_builder/ajax.tmpl",
+        query           => $input,
+        type            => "intranet",
+        authnotrequired => 0,
+        flagsrequired   => {editcatalogue => '*'},
+        debug           => 1,
+    });
+
+    my $ret;
+    my ($alpha, $num) = ($code =~ $BASE_CALLNUMBER_RE);
+    if (defined $num) { # otherwise no point
+        my $dbh = C4::Context->dbh;
+        if ( my $max = $dbh->selectrow_array("SELECT MAX(itemcallnumber)
+                                              FROM items
+                                              WHERE itemcallnumber LIKE ?", undef, "$code%") ) {
+            (undef, $num) = ($max =~ $BASE_CALLNUMBER_RE);
+            my ($num_alpha, $num_num) = ($num =~ m/^(\D+)?(\d+)$/);
+            my $len = length($num_num);
+            $num_num++;
+            if ($len == length($num_num)) { # no overflow
+                $ret = $num_alpha . $num_num
+            }
+        }
+        else { # pad with 0
+            my $pad_len = 4 - length($num);
+            if ($pad_len > 0) {
+                if ($num =~ m/^\d+$/) {
+                    $ret = $num. ("0" x $pad_len);
+                } else {
+                    $ret = $num ;
+                    $ret .= "0" x ($pad_len - 1) if $pad_len > 1;
+                    $ret .= "1";
+                }
+            }
+        }
+    }
+    $ret = "$alpha $ret" if $ret;
+    
+    $template->param(
+        return => $ret || $code
+    );
+    output_html_with_http_headers $input, $cookie, $template->output;
+}
+
+1;
-- 
1.7.2.5