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<?php

    namespace Donut\PostFeed;

    use Donut\IProducer;
    use Donut\Manager;
    use Donut\Time;
    use Donut\Helpers;
    use Nette\Utils\Strings;
    use Nette\Utils\Json;


    class FetchNewItems implements IProducer
    {
        /** @var string */
        private $queue;

        /** @var string */
        private $url;


        /**
         * @param  string
         * @param  string
         */
        public function __construct($queue, $url)
        {
            $this->queue = $queue;
            $this->url = $url;
        }


        /**
         * @return string
         */
        public function getUniqueId()
        {
            return $this->url;
        }


        /**
         * @return void
         */
        public function run(Manager $manager, Time $lastrun = NULL)
        {
            if ($lastrun === NULL) { // nedelame nic - prave ted zadne prispevky nepribyly
                return;
            }

            $checkDate = Time::sub($lastrun, 24 * 60); // akceptujeme prispevky az 24h zpetne
            $content = Helpers::fetchUrl($this->url);
            $posts = Json::decode($content, Json::FORCE_ARRAY);

            foreach ($posts as $post) {
                $postDate = Time::create($post['date']);

                if ($postDate->isOlderThan($checkDate)) {
                    continue;
                }

                if ($manager->existsItem($this->url, $post['id'])) {
                    continue;
                }

                $manager->createMessage($this->queue, $post, $postDate);
                $manager->saveItem($this->url, $post['id']);
            }
        }
    }