<?php
namespace WapplerSystems\Meilisearch\IndexQueue;

/***************************************************************
 *  Copyright notice
 *
 *  (c) 2010-2015 Ingo Renner <ingo@typo3.org>
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *
 *  This script is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/

/**
 * Index Queue Page Indexer response to provide data for requested actions.
 *
 * @author Ingo Renner <ingo@typo3.org>
 */
class PageIndexerResponse
{

    /**
     * Unique request ID.
     *
     * @var string
     */
    protected $requestId = null;

    /**
     * The actions' results as action => result pairs.
     *
     * @var array
     */
    protected $results = [];

    /**
     * Turns a JSON encoded result string back into its PHP representation.
     *
     * @param string $jsonEncodedResponse JSON encoded result string
     * @return array|bool An array of action => result pairs or FALSE if the response could not be decoded
     */
    public static function getResultsFromJson($jsonEncodedResponse)
    {
        $responseData = json_decode($jsonEncodedResponse, true);

        if (is_array($responseData['actionResults'])) {
            foreach ($responseData['actionResults'] as $action => $serializedActionResult) {
                $responseData['actionResults'][$action] = unserialize($serializedActionResult);
            }
        } elseif (is_null($responseData)) {
            $responseData = false;
        }

        return $responseData;
    }

    /**
     * Adds an action's result.
     *
     * @param string $action The action name.
     * @param mixed $result The action's result.
     * @throws \RuntimeException if $action is null
     */
    public function addActionResult($action, $result)
    {
        if (is_null($action)) {
            throw new \RuntimeException(
                'Attempt to provide a result without providing an action',
                1294080509
            );
        }

        $this->results[$action] = $result;
    }

    /**
     * Gets the complete set of results or a specific action's results.
     *
     * @param string $action Optional action name.
     * @return array
     */
    public function getActionResult($action = null)
    {
        $result = $this->results;

        if (!empty($action)) {
            $result = $this->results[$action];
        }

        return $result;
    }

    /**
     * Compiles the response's content so that it can be sent back to the
     * Index Queue page indexer.
     *
     * @return string The response content
     */
    public function getContent()
    {
        return $this->toJson();
    }

    /**
     * Converts the response's data to JSON.
     *
     * @return string JSON representation of the results.
     */
    protected function toJson()
    {
        $serializedActionResults = [];

        foreach ($this->results as $action => $result) {
            $serializedActionResults[$action] = serialize($result);
        }

        $responseData = [
            'requestId' => $this->requestId,
            'actionResults' => $serializedActionResults
        ];

        return json_encode($responseData);
    }

    /**
     * Gets the Id of the request this response belongs to.
     *
     * @return string Request Id.
     */
    public function getRequestId()
    {
        return $this->requestId;
    }

    /**
     * Sets the Id of the request this response belongs to.
     *
     * @param string $requestId Request Id.
     * @return void
     */
    public function setRequestId($requestId)
    {
        $this->requestId = $requestId;
    }
}