<?php

class Config
{
    /**
    * local_variables
    *
    * An array of all the local variables
    */
    private static $local_variables = array(
        ['name' => 'SQL_USERNAME',        'data' => 'username'],
        ['name' => 'SQL_PASSWORD',        'data' => 'password'],
        ['name' => 'SQL_HOSTNAME',        'data' => 'hostname'],
        ['name' => 'SQL_DATABASE',        'data' => 'database'],
    );


    /**
    * GetConfig
    *
    * Gets a public config variable
    *
    * @param string $name The name of the config you wish you get.
    */
    public static function GetConfig($name)
    {
        $serverVariable = GetServerVariable($name);
        if($serverVariable !== false) {
            return $serverVariable;
        }

        $localVariable = GetLocalVariable($name);
        if($localVariable !== false) {
            return $localVariable;
        }

        return false;
    }

    /**
    * GetServerVariable
    *
    * Gets a variable that's stored on the sql database.
    *
    * @param string $name The name of the variable you wish to get from the server.
    */
    private static function GetServerVariable($name)
    {
        if(!DoesServerVariableExist($name)) {
            return false;
        }
    }

    /**
    * DoesServerVariableExist
    *
    * Checks of a variable exists on the database.
    *
    * @param string $name The name of the variable you wish to lookup.
    */
    private static function DoesServerVariableExist($name)
    {

    }

    /**
    * GetLocalVariable
    *
    * Gets a variable from local storag.
    *
    * @param string $name The name of the variable you wish to get.
    */
    private static function GetLocalVariable($name)
    {
        if(!DoesLocalVariableExist($name)) {
            return false;
        }
    }

    /**
    * DoesLocalVariableExist
    *
    * Checks if a local variable exists
    *
    * @param string $name The name of the variable you wish to lookup.
    */
    private static function DoesLocalVariableExist($name)
    {
        for($i = 0; $i < count($local_variables); $i++) {
            if($local_variables[$i]['name'] === $name) {
                return true;
            }
        }

        return false;
    }
}