<?php

namespace yiins\web;

class Response extends \CApplicationComponent
{

    const FORMAT_RAW = 'raw';
    const FORMAT_HTML = 'html';
    const FORMAT_JSON = 'json';
    const FORMAT_JSONP = 'jsonp';
    const FORMAT_XML = 'xml';

    public $format = self::FORMAT_HTML;
    /**
     * @var ResponseFilterInterface[]
     */
    public $filters = [];
    protected $_result;
    protected $isSent = false;

    public function init()
    {
        parent::init();
    }

    public function setResult($value)
    {
        $this->_result = $value;
    }

    public function setStatusCode($value)
    {
        header('HTTP/1.1 ' . $value);
    }

    /**
     * Sends the response to the client.
     */
    public function send()
    {
        if ($this->isSent) {
            return;
        }
        $this->prepare();
        $this->sendContent();
        $this->isSent = true;
    }

    protected function prepare()
    {
        if ($this->format === static::FORMAT_JSON) {
            header('Content-type: application/json; charset=utf-8');
            $this->_result = \CJSON::encode($this->_result);
        }
        if ($this->format === static::FORMAT_XML) {
            header('Content-type: application/xml; charset=utf-8');
        }
        if ($this->format === static::FORMAT_RAW) {
            header('Content-type: text/plain; charset=utf-8');
        }

        foreach ($this->filters as $filter) {
            if ($filter instanceof ResponseFilterInterface) {
                $this->_result = $filter->process($this->_result);
            }
        }
    }

    protected function sendContent()
    {
        echo trim($this->_result);
    }

}