<?php

namespace Illuminate\Http;

use Exception;
use ArrayObject;
use JsonSerializable;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Contracts\Support\Renderable;
use Symfony\Component\HttpFoundation\Response as BaseResponse;
// namespace about be use
class Response extends BaseResponse
{// a response about extends
    use ResponseTrait;// use a trait

    /**
     * The original content of the response.
     *
     * @var mixed
     */
    public $original;// The original content of the response.

    /**
     * The exception that triggered the error response (if applicable).
     *
     * @var \Exception
     */
    public $exception;// The exception that triggered the error response (if applicable)

    /**
     * Set the content on the response.
     *
     * @param  mixed  $content
     * @return $this
     */
    public function setContent($content)
    {// Set the content on the response.
        $this->original = $content;// this content

        // If the content is "JSONable" we will set the appropriate header and convert
        // the content to JSON. This is useful when returning something like models
        // from routes that will be automatically transformed to their JSON form.
        if ($this->shouldBeJson($content)) {
            $this->header('Content-Type', 'application/json');

            $content = $this->morphToJson($content);
        }// If the content is "JSONable" we will set the appropriate header and convert
        // the content to JSON. This is useful when returning something like models
        // from routes that will be automatically transformed to their JSON form

        // If this content implements the "Renderable" interface then we will call the
        // render method on the object so we will avoid any "__toString" exceptions
        // that might be thrown and have their errors obscured by PHP's handling.
        elseif ($content instanceof Renderable) {
            $content = $content->render();
        }// If this content implements the "Renderable" interface then we will call the
        // render method on the object so we will avoid any "__toString" exceptions
        // that might be thrown and have their errors obsured by PHP's handling.

        return parent::setContent($content);// a parent:: setContent
    }

    /**
     * Morph the given content into JSON.
     *
     * @param  mixed   $content
     * @return string
     */
    protected function morphToJson($content)
    {
        if ($content instanceof Jsonable) {
            return $content->toJson();
        }//content

        return json_encode($content);//json_encode(content)
    }//Morph the given content into JSON

    /**
     * Determine if the given content should be turned into JSON.
     *
     * @param  mixed  $content
     * @return bool
     */
    protected function shouldBeJson($content)
    {//Determine if the given content should be turned into JSON.
        return $content instanceof Jsonable ||
               $content instanceof ArrayObject ||
               $content instanceof JsonSerializable ||
               is_array($content);
    }// if can be morph to json ,then morph it.

    /**
     * Get the original response content.
     *
     * @return mixed
     */
    public function getOriginalContent()
    {
        return $this->original;// big get
    }//Get the original response content

    /**
     * Set the exception to attach to the response.
     *
     * @param  \Exception  $e
     * @return $this
     */
    public function withException(Exception $e)
    {
        $this->exception = $e;// set exception

        return $this;// and return it self
    }//Set the exception to attach to the response
}