<?php
/**
 * SPDX-FileCopyrightText: 2024 Sascha Nitsch (grumpydeveloper) https://contentnation.net/@grumpydevelop
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * @author Sascha Nitsch (grumpydeveloper)
 **/

namespace Federator\Api\FedUsers;

/**
 * handle activitypub outbox requests
 */
class Outbox implements \Federator\Api\FedUsers\FedUsersInterface
{
    /**
     * main instance
     *
     * @var \Federator\Api $main
     */
    private $main;

    /**
     * constructor
     * @param \Federator\Api $main main instance
     */
    public function __construct($main)
    {
        $this->main = $main;
    }

    /**
     * handle get call
     *
     * @param string|null $_user user to fetch outbox for
     * @return string|false response
     */
    public function get($_user)
    {
        if (!isset($_user)) {
            return false;
        }
        $dbh = $this->main->getDatabase();
        $cache = $this->main->getCache();
        $connector = $this->main->getConnector();
        // get user
        $user = \Federator\DIO\User::getUserByName(
            $dbh,
            $_user,
            $connector,
            $cache
        );
        if ($user->id === null) {
            return false;
        }

        // get posts from user
        $outbox = new \Federator\Data\ActivityPub\Common\Outbox();
        $min = $this->main->extractFromURI("min", "");
        $max = $this->main->extractFromURI("max", "");
        $page = $this->main->extractFromURI("page", "");
        if ($page !== "") {
            $items = \Federator\DIO\Posts::getPostsByUser($dbh, $user->id, $connector, $cache, $min, $max);
            $outbox->setItems($items);
        } else {
            $items = [];
        }
        $config = $this->main->getConfig();
        $domain = $config['generic']['externaldomain'];
        $id = 'https://' . $domain . '/users/' . $_user . '/outbox';
        $outbox->setPartOf($id);
        $outbox->setID($id);
        if ($page !== '') {
            $id .= '?page=' . urlencode($page);
        } else {
            $outbox->setType('OrderedCollection');
        }
        if ($page === '' || $outbox->count() == 0) {
            $outbox->setFirst($id . '?page=0');
            $outbox->setLast($id . '&min=0');
        }
        if (sizeof($items) > 0) {
            $newestId = $items[0]->getPublished();
            $oldestId = $items[sizeof($items) - 1]->getPublished();
            $outbox->setNext($id . '&max=' . $newestId);
            $outbox->setPrev($id . '&min=' . $oldestId);
        }
        $obj = $outbox->toObject();
        return json_encode($obj, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
    }

    /**
     * handle post call
     *
     * @param string|null $_user user to add data to outbox @unused-param
     * @return string|false response
     */
    public function post($_user)
    {
        return false;
    }
}