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<?php

    namespace Donut;


    interface IAdapter
    {
        /**
         * @return void
         */
        function createMessage(Message $message);


        /**
         * @return Message|NULL
         */
        function fetchMessage();


        /**
         * @return void
         */
        function markAsDone(Message $message, Time $processed);


        /**
         * @return void
         */
        function markAsFailed(Message $message, Time $processed);


        /**
         * @param  string
         * @param  string|NULL
         * @param  Message|NULL
         * @return void
         */
        function log($subject, $text = NULL, Message $message = NULL, Time $date);


        /**
         * @return Time|NULL
         */
        function getProducerLastRun(IProducer $producer);


        /**
         * @return void
         */
        function saveProducerLastRun(IProducer $producer, Time $lastrun);


        /**
         * @param  string
         * @param  string
         * @return bool
         */
        function existsItem($group, $itemId);


        /**
         * @param  string
         * @param  string
         * @return void
         */
        function saveItem($group, $itemId);
    }