<?php

namespace RR;

class Request{

    const PARAM_ALPHA = 'alpha';
    const PARAM_ALPHANUM = 'alphanum';

    const PARAM_INT = 'integer';
    const PARAM_DOUBLE = 'double';

    public static function requiredParam($parname, $type, $options = Array(), $default = ''){
        // POST has precedence.
        if (isset($_POST[$parname])) {
            $param = $_POST[$parname];
        } else if (isset($_GET[$parname])) {
            $param = $_GET[$parname];
        } else {
            return $default;
        }

        $param = self::filter($type, $param);

        foreach ($options as $key => $option){
            self::$key($param, $option);
        }
        return $param;
    }

    public static function requiredParamArray($parname, $type, $default = '', $options = Array() ){

    }

    public static function optionalParam(){

    }

    public static function optionalParamArray(){

    }

    private static function filter($type, $paramname){
        switch ($type){
            case 'integer':
                if(is_integer($paramname)){
                    return $paramname;
                }
                break;
            case 'double':
                if(is_double($paramname)){
                    return $paramname;
                }
                break;
            case 'alpha':
                
        }
    }

    /*
     *  Validations
     */
    private static function minVal(){

    }

    private static function maxVal(){

    }

}