<?php

/* Include the Scrott system-level configuration file if it exists */
is_file("scrott.conf.php") &&
    require_once "scrott.conf.php";

require_once "class/mysql.class.php";

/*
 * Global functions / operations and access to contextual or session-based information
 */
abstract class Framework
{
    static $dbobj = null;

    /*
     * Check for the existence of Scrott's system-level config
     */
    function scrottConfExists()
    {
        global $_SCROTT;
        return isset($_SCROTT['conf']);
    }

    /*
     * Get the absolute path on this server for the root of this app
     */
    function ar()
    {
        return substr($_SERVER['PHP_SELF'], 0, -10); // 10 = length of "/index.php"
    }

    /*
     * Get the absolute path to the current page
     */
    function ap()
    {
        return $this->ar() . $_REQUEST['path'];
    }

    /*
     * Redirect to the given URL and die
     */
    function redirectTo($url)
    {
        header("Location: " . $url);
        exit;
    }

    /*
     * Get or create the app's database connection object (this is a singleton object and dependent on system-level config)
     */
    function getDbConnection()
    {
        global $_SCROTT;

        if (self::$dbobj != null)
            return self::$dbobj;

        switch ($_SCROTT['dbEngine'])
        {
        case "mysql":
            $host     = $_SCROTT['dbAddress'];
            $username = $_SCROTT['dbUser'];
            $password = $_SCROTT['dbPass'];
            $dbName   = $_SCROTT['dbName'];
            self::$dbobj = new Mysql($host, $username, $password, $dbName);
            break;

        default:
            throw new Exception("Problem with Scrott Configuration. Invalid database engine specified.");
            break;
        }

        return self::$dbobj;
    }
}

?>