<?php
/*
* OIDplus 2.0
* Copyright 2019 Daniel Marschall, ViaThinkSoft
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class OIDplusGs1 extends OIDplusObject {
private $number;
public function __construct($number) {
// TODO: syntax checks
$this->number = $number;
}
public static function parse($node_id) {
@list($namespace, $number) = explode(':', $node_id, 2); if ($namespace !== 'gs1') return false;
return new self($number);
}
public static function objectTypeTitle() {
return "GS1 Based IDs (GLN/GTIN/SSCC/...)";
}
public static function objectTypeTitleShort() {
return "GS1";
}
public static function ns() {
return 'gs1';
}
public static function root() {
return 'gs1:';
}
public function isRoot() {
return $this->number == '';
}
public function nodeId() {
return 'gs1:'.$this->number;
}
public function addString($str) {
throw new Exception('GS1 value needs to be numeric');
}
return $this->nodeId() . $str;
}
public function crudShowId(OIDplusObject $parent) {
return $this->chunkedNotation(false);
}
public function crudInsertPrefix() {
return $this->isRoot() ? '' : $this->chunkedNotation(false);
}
public function jsTreeNodeName(OIDplusObject $parent = null) {
if ($parent == null) return $this->objectTypeTitle();
}
public function defaultTitle() {
return $this->number;
}
public function isLeafNode() {
return !$this->isBaseOnly();
}
public function getContentPage(&$title, &$content, &$icon) {
$icon = file_exists(__DIR__
.'/icon_big.png') ?
'plugins/objectTypes/'.basename(__DIR__
).'/icon_big.png' : '';
if ($this->isRoot()) {
$title = OIDplusGs1::objectTypeTitle();
$res = OIDplus
::db()->query("select * from ".OIDPLUS_TABLENAME_PREFIX
."objects where parent = ?", array(self::root())); if (OIDplus::db()->num_rows($res) > 0) {
$content = 'Please select an item in the tree view at the left to show its contents.';
} else {
$content = 'Currently, no GS1 based numbers are registered in the system.';
}
if (!$this->isLeafNode()) {
if (OIDplus::authUtils()::isAdminLoggedIn()) {
$content .= '<h2>Manage root objects</h2>';
} else {
$content .= '<h2>Available objects</h2>';
}
$content .= '%%CRUD%%';
}
} else {
if ($this->isLeafNode()) {
$chunked = $this->chunkedNotation(true);
$checkDigit = $this->checkDigit();
$content = '<h2>'.$chunked.' - <abbr title="check digit">'.$checkDigit.'</abbr></h2>';
$content .= '<p><a target="_blank" href="https://www.ean-search.org/?q='.htmlentities($this->fullNumber()).'">Lookup in ean-search.org</a></p>'; $content .= '<img src="plugins/objectTypes/'.basename(__DIR__
).'/barcode.php?number='.urlencode($this->fullNumber()).'">'; $content .= '<h2>Description</h2>%%DESC%%'; // TODO: add more meta information about the object type
} else {
$chunked = $this->chunkedNotation(true);
$content = '<h2>'.$chunked.'</h2>';
$content .= '<h2>Description</h2>%%DESC%%'; // TODO: add more meta information about the object type
if ($this->userHasWriteRights()) {
$content .= '<h2>Create or change subsequent objects</h2>';
} else {
$content .= '<h2>Subsequent objects</h2>';
}
$content .= '%%CRUD%%';
}
}
}
# ---
public function isBaseOnly() {
return strlen($this->number) <= 7; }
public function chunkedNotation($withAbbr=true) {
$curid = 'gs1:'.$this->number;
$res = OIDplus
::db()->query("select id, title from ".OIDPLUS_TABLENAME_PREFIX
."objects where id = ?", array($curid)); if (OIDplus::db()->num_rows($res) == 0) return $this->number();
while (OIDplus
::db()->num_rows($res = OIDplus
::db()->query("select parent, title from ".OIDPLUS_TABLENAME_PREFIX
."objects where id = ?", array($curid))) > 0) { $row = OIDplus::db()->fetch_array($res);
$curid = $row['parent'];
$hints[] = $row['title'];
}
$full = 'gs1:'.$this->number;
foreach ($lengths as $len) {
$chunks[] = substr($full, $len); $full = substr($full, 0, $len); }
foreach ($chunks as $c) {
}
}
public function fullNumber() {
return $this->number . $this->checkDigit();
}
public function checkDigit() {
$mul = 3;
$sum = 0;
for ($i=strlen($this->number)-1; $i>=0; $i--) { $sum += $this->number[$i] * $mul;
$mul = $mul == 3 ? 1 : 3;
}
return 10 - ($sum % 10);
}
public function one_up() {
return OIDplusObject
::parse($this->ns().':'.substr($this->number,0,strlen($this->number)-1)); }
private static function distance_($a, $b) {
for ($i=0; $i<$min_len; $i++) {
if ($a[$i] != $b[$i]) return false;
}
}
public function distance($to) {
if (!is_object($to)) $to = OIDplusObject
::parse($to); if (!($to instanceof $this)) return false;
// This is pretty tricky, because the whois service should accept GS1 numbers with and without checksum
if ($this->number == $to->number) return 0;
if ($this->number.$this->checkDigit() == $to->number) return 0;
if ($this->number == $to->number.$to->checkDigit()) return 0;
$b = $this->number;
$a = $to->number;
$tmp = self::distance_($a, $b);
if ($tmp != false) return $tmp;
$b = $this->number.$this->checkDigit();
$a = $to->number;
$tmp = self::distance_($a, $b);
if ($tmp != false) return $tmp;
$b = $this->number;
$a = $to->number.$to->checkDigit();
$tmp = self::distance_($a, $b);
if ($tmp != false) return $tmp;
return null;
}
}
OIDplus::registerObjectType('OIDplusGs1');