<?php

class Http_Request
{
  private $raw_values = array();
  private $valid_values = array();

  public function __construct()
  {
    if (!empty($_POST))
      $this->raw_values = $_POST;
    else if (!empty($_GET))
      $this->raw_values = $_GET;
  }

  public function get($key, $defaultValue = '')
  {
    return self::getValue($this->valid_values, $key, $defaultValue);
  }

  public function getForValidation($key, $defaultValue = '')
  {
    return self::getValue($this->raw_values, $key, $defaultValue);
  }

  static private function getValue($values, $key, $defaultValue)
  {
    if (array_key_exists($key, $values))
      return $values[$key];

    return $defaultValue;
  }

  public function validate($key, $validator)
  {
    $value = $this->getForValidation($key);

    if ($validator->isValid($value))
    {
      $this->set($key, $value);

      return true;
    }

    return false;
  }

  public function set($key, $value)
  {
    $this->valid_values[$key] = $value;
  }

  public function setForValidation($key, $value)
  {
    $this->raw_values[$key] = $value;
  }
}

?>