rugk/threema-msgapi-sdk-php

<?php
/**
 * @author Threema GmbH
 * @copyright Copyright (c) 2015-2016 Threema GmbH
 */


namespace Threema\Core;

class AssocArray {

    /**
     * @var array
     */
    private $data;

    /**
     * @param array $data
     */
    public function __construct(array $data) {
        //be sure a array is set
        $this->data = null !== $data ? $data : array();
    }

    /**
     * @param string $key
     * @param null $defaultValue
     * @return mixed|null return the key value or the default value
     */
    public function getValue($key, $defaultValue = null) {
        if(false === array_key_exists($key, $this->data)) {
            return $defaultValue;
        }

        return $this->data[$key];
    }

    /**
     * @param $string
     * @param array|null $requiredKeys
     * @return AssocArray
     * @throws Exception
     */
    public static final function byJsonString($string, array $requiredKeys = null) {
        $v = json_decode($string, true);
        if(null === $v || false === $v) {
            throw new Exception('invalid json string');
        }

        //validate first
        if(null !== $requiredKeys) {
            //validate array first
            foreach($requiredKeys as $requiredKey) {
                if(false === array($v)) {
                    throw new Exception('required key '.$requiredKey.' failed');
                }
            }
        }
        return new AssocArray($v);
    }
}