view_json.php

<?php
namespace PMVC\PlugIn\view;

use PMVC\Event;
use PMVC\HashMap;

${_INIT_CONFIG}[_CLASS] = __NAMESPACE__ . '\view_json';

class view_json extends ViewEngine
{
    private $_jsonData;

    public function init()
    {
        $this['headers'] = ['Content-type: application/json'];
        $this->_jsonData = new HashMap();
        \PMVC\callPlugin('dispatcher', 'attach', [
            $this,
            Event\MAP_REQUEST,
        ]);
        \PMVC\callPlugin('dispatcher', 'attach', [
            $this,
            Event\WILL_SET_VIEW,
        ]);
    }

    public function onWillSetView()
    {
        $this->_resetAcceptJson();
    }

    public function onMapRequest()
    {
        $this->_resetAcceptJson();
    }

    private function _resetAcceptJson()
    {
        if (\PMVC\exists('controller', 'plugin')) {
            $accept = \PMVC\plug('getenv')->get('HTTP_ACCEPT');
            if ('application/json' === $accept) {
                \PMVC\plug('controller')[_VIEW_ENGINE] = 'json';
            }
        }
    }

    /**
     * Set theme folder
     */
    public function setThemeFolder($val)
    {
    }

    public function onFinish()
    {
        $lastGet = $this->get();
        if ($lastGet) {
            $this->_jsonData[[]] = $lastGet;
        }
        if (defined('JSON_INVALID_UTF8_SUBSTITUTE')) {
            echo json_encode(\PMVC\get($this->_jsonData), JSON_INVALID_UTF8_SUBSTITUTE);
        } else {
            echo \PMVC\utf8JsonEncode(\PMVC\get($this->_jsonData));
        }
        if (json_last_error() !== JSON_ERROR_NONE) {
            echo json_encode([
                'debugs' => [
                    'error' => json_last_error_msg(),
                ],
            ]);
        }
    }

    public function process()
    {
        $this->_jsonData[[]] = $this->get();
        if (!isset($this['run']) && $this->get('themePath')) {
            // should only keep one themePath
            $this->_jsonData['themePath'] = $this->get('themePath');
        }
        $this->clean();
        if (
            \PMVC\getOption(Event\FINISH) ||
            !\PMVC\exists('dispatcher', 'plugin')
        ) {
            // run directly if miss event
            return $this->onFinish();
        } else {
            // only run by finish event
            \PMVC\plug('dispatcher')->attachAfter($this, Event\FINISH);
        }
    }
}