<?php
	$prerequisite_class = 'InPortalPrerequisites';

	/**
	 * Class, that holds all prerequisite scripts for "In-Portal" module
	 *
	 */
	class InPortalPrerequisites extends kHelper {

		/**
		 * Install toolkit instance
		 *
		 * @var kInstallToolkit
		 */
		var $_toolkit = null;

		/**
		 * Sets common instance of installator toolkit
		 *
		 * @param kInstallToolkit $instance
		 */
		function setToolkit(&$instance)
		{
			$this->_toolkit =& $instance;
		}

		/**
		 * Checks minimal version, that could be upgradeable
		 *
		 * @param string $mode when called mode {install, upgrade)
		 */
		function CheckPrerequisites($versions, $mode)
		{
			$errors = Array ();

			if ($mode == 'upgrade') {
				$min_version = '4.3.2';

				$current_version = $this->_toolkit->ConvertModuleVersion($versions[0]);
				$needed_version = $this->_toolkit->ConvertModuleVersion($min_version);
				if ($current_version < $needed_version) {
					$errors[] = 'Please upgrade "In-Portal" to version ' . $min_version . ' or above';
				}
			}

			return $errors;
		}
	}

?>