<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

/**
 * Caching Driver for SimplePie
 */
class EE_SimplePie_Cache_Driver implements SimplePie_Cache_Base
{
    /**
     * Unique ID for the cache item
     *
     * @var string
     */
    protected $name = '';

    /**
     * Create a new cache object
     *
     * @param string $location Location string (from SimplePie::$cache_location)
     * @param string $name Unique ID for the cache
     * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
     */
    public function __construct($location, $name, $type)
    {
        // Separate string to get the namespace
        $location = explode(':', $location, 2);

        if (isset($location[1]) && ! empty($location[1])) {
            $this->name = $location[1] . '/';
        }

        $this->name .= $name;
    }

    /**
     * Save data to the cache
     *
     * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
     * @return bool Success status
     */
    public function save($data)
    {
        if ($data instanceof SimplePie) {
            $data = $data->data;
        }

        return ee()->cache->save('/rss_parser/' . $this->name, $data, 0, Cache::GLOBAL_SCOPE);
    }

    /**
     * Retrieve the data saved to the cache
     *
     * @return array Data for SimplePie::$data
     */
    public function load()
    {
        return ee()->cache->get('/rss_parser/' . $this->name, Cache::GLOBAL_SCOPE);
    }

    /**
     * Retrieve the last modified time for the cache
     *
     * @return int Timestamp
     */
    public function mtime()
    {
        $info = ee()->cache->get_metadata('/rss_parser/' . $this->name, Cache::GLOBAL_SCOPE);

        if (is_array($info)) {
            return $info['mtime'];
        }

        return false;
    }

    /**
     * Set the last modified time to the current time
     *
     * @return bool Success status
     */
    public function touch()
    {
        $data = $this->load();

        if ($data !== false) {
            return $this->save($data);
        }

        return false;
    }

    /**
     * Remove the cache
     *
     * @return bool Success status
     */
    public function unlink()
    {
        return ee()->cache->delete('/rss_parser/' . $this->name, Cache::GLOBAL_SCOPE);
    }
}

// EOF
