<?php


namespace Twilio;


class Values implements \ArrayAccess {
    const NONE = 'Twilio\\Values\\NONE';

    protected $options;

    public static function of($array) {
        $result = array();
        foreach ($array as $key => $value) {
            if ($value === self::NONE) {
                continue;
            }
            $result[$key] = $value;
        }
        return $result;
    }

    public function __construct($options) {
        $this->options = array();
        foreach ($options as $key => $value) {
            $this->options[strtolower($key)] = $value;
        }
    }

    /**
     * (PHP 5 &gt;= 5.0.0)<br/>
     * Whether a offset exists
     * @link http://php.net/manual/en/arrayaccess.offsetexists.php
     * @param mixed $offset <p>
     * An offset to check for.
     * </p>
     * @return boolean true on success or false on failure.
     * </p>
     * <p>
     * The return value will be casted to boolean if non-boolean was returned.
     */
    public function offsetExists($offset) {
        return true;
    }

    /**
     * (PHP 5 &gt;= 5.0.0)<br/>
     * Offset to retrieve
     * @link http://php.net/manual/en/arrayaccess.offsetget.php
     * @param mixed $offset <p>
     * The offset to retrieve.
     * </p>
     * @return mixed Can return all value types.
     */
    public function offsetGet($offset) {
        $offset = strtolower($offset);
        return array_key_exists($offset, $this->options) ? $this->options[$offset] : self::NONE;
    }

    /**
     * (PHP 5 &gt;= 5.0.0)<br/>
     * Offset to set
     * @link http://php.net/manual/en/arrayaccess.offsetset.php
     * @param mixed $offset <p>
     * The offset to assign the value to.
     * </p>
     * @param mixed $value <p>
     * The value to set.
     * </p>
     * @return void
     */
    public function offsetSet($offset, $value) {
        $this->options[strtolower($offset)] = $value;
    }

    /**
     * (PHP 5 &gt;= 5.0.0)<br/>
     * Offset to unset
     * @link http://php.net/manual/en/arrayaccess.offsetunset.php
     * @param mixed $offset <p>
     * The offset to unset.
     * </p>
     * @return void
     */
    public function offsetUnset($offset) {
        unset($this->options[$offset]);
    }


}