<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\web;

use yii\base\InvalidParamException;
use yii\helpers\Json;

/**
 * Parses a raw HTTP request using [[\yii\helpers\Json::decode()]]
 *
 * @author Dan Schmidt <danschmidt5189@gmail.com>
 * @since 2.0
 */
class JsonParser implements RequestParserInterface
{
    /**
     * @var boolean whether to return objects in terms of associative arrays.
     */
    public $asArray = true;
    /**
     * @var boolean whether to throw a [[BadRequestHttpException]] if the body is invalid json
     */
    public $throwException = true;

    /**
     * Parses a HTTP request body.
     * @param  string                  $rawBody     the raw HTTP request body.
     * @param  string                  $contentType the content type specified for the request body.
     * @return array                   parameters parsed from the request body
     * @throws BadRequestHttpException if the body contains invalid json and [[throwException]] is `true`.
     */
    public function parse($rawBody, $contentType)
    {
        try {
            return Json::decode($rawBody, $this->asArray);
        } catch (InvalidParamException $e) {
            if ($this->throwException) {
                throw new BadRequestHttpException('Invalid JSON data in request body: ' . $e->getMessage(), 0, $e);
            }

            return null;
        }
    }
}
