Open Source Billing

modules/tax/classes/Model/Invoice/Item/Tax.php

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+<?php defined('SYSPATH') or die('No direct access allowed.');
+
+/**
+ * This class supports tax calculations
+ *
+ * @package    Tax
+ * @category   Models
+ * @author     Deon George
+ * @copyright  (c) 2009-2013 Open Source Billing
+ * @license    http://dev.osbill.net/license.html
+ */
+class Model_Invoice_Item_Tax extends ORM_OSB {
+}
+?>

modules/tax/classes/Model/Tax.php

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+<?php defined('SYSPATH') or die('No direct access allowed.');
+
+/**
+ * This class supports tax calculations
+ *
+ * @package    Tax
+ * @category   Models
+ * @author     Deon George
+ * @copyright  (c) 2009-2013 Open Source Billing
+ * @license    http://dev.osbill.net/license.html
+ */
+class Model_Tax extends ORM_OSB {
+}
+?>

modules/tax/classes/Tax.php

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+<?php defined('SYSPATH') or die('No direct access allowed.');
+
+/**
+ * This class provides a tax information
+ *
+ * @package    Tax
+ * @category   Helpers
+ * @author     Deon George
+ * @copyright  (c) 2009-2013 Open Source Billing
+ * @license    http://dev.osbill.net/license.html
+ */
+class Tax {
+	/**
+	 * Return array of taxes
+	 *
+	 * @param $cid
+	 * @param $zone
+	 * @param $value
+	 * @return array Tax Information
+	 */
+	public static function detail($cid,$zone,$value=0) {
+		$tax = ORM::factory('Tax')
+			->where('country_id','=',$cid)
+			->and_where('zone','=',$zone)
+			->find_all();
+
+		$taxes = array();
+		foreach ($tax as $to) {
+			$total = array();
+
+			$total['id'] = $to->id;
+			$total['description'] = $to->description;
+			$total['amount'] = $to->rate*$value;
+			$total['rate'] = $to->rate;
+
+			array_push($taxes,$total);
+		}
+
+		return $taxes;
+	}
+
+	// Calculate the tax amount
+	public static function total($cid,$zone,$value) {
+		$total = 0;
+
+		foreach (static::detail($cid,$zone,$value) as $tax)
+			$total += $tax['amount'];
+
+		return $total;
+	}
+
+	public static function add($value) {
+		// @todo Tax details should come from session
+		// @todo Rounding should be a global config
+		return round($value+static::total(61,NULL,$value),2);
+	}
+}
+?>