first commit

public/system/library/cart/weight.php

@@ -0,0 +1,57 @@
+<?php
+namespace Cart;
+class Weight {
+	private $weights = array();
+
+	public function __construct($registry) {
+		$this->db = $registry->get('db');
+		$this->config = $registry->get('config');
+
+		$weight_class_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "weight_class wc LEFT JOIN " . DB_PREFIX . "weight_class_description wcd ON (wc.weight_class_id = wcd.weight_class_id) WHERE wcd.language_id = '" . (int)$this->config->get('config_language_id') . "'");
+
+		foreach ($weight_class_query->rows as $result) {
+			$this->weights[$result['weight_class_id']] = array(
+				'weight_class_id' => $result['weight_class_id'],
+				'title'           => $result['title'],
+				'unit'            => $result['unit'],
+				'value'           => $result['value']
+			);
+		}
+	}
+
+	public function convert($value, $from, $to) {
+		if ($from == $to) {
+			return $value;
+		}
+
+		if (isset($this->weights[$from])) {
+			$from = $this->weights[$from]['value'];
+		} else {
+			$from = 1;
+		}
+
+		if (isset($this->weights[$to])) {
+			$to = $this->weights[$to]['value'];
+		} else {
+			$to = 1;
+		}
+
+		return $value * ($to / $from);
+	}
+
+	public function format($value, $weight_class_id, $decimal_point = '.', $thousand_point = ',') {
+		if (isset($this->weights[$weight_class_id])) {
+			return number_format($value, 2, $decimal_point, $thousand_point) . $this->weights[$weight_class_id]['unit'];
+		} else {
+			return number_format($value, 2, $decimal_point, $thousand_point);
+		}
+	}
+
+	public function getUnit($weight_class_id) {
+		if (isset($this->weights[$weight_class_id])) {
+			return $this->weights[$weight_class_id]['unit'];
+		} else {
+			return '';
+		}
+	}
+}