<?php

namespace ActivityPub\Objects;

use ActivityPub\Utils\RandomProvider;
use Symfony\Component\HttpFoundation\Request;

/**
 * The IdProvider provides methods to generate new unique ids for objects
 */
class IdProvider
{
    const DEFAULT_ID_PATH_PREFIX = 'ap';
    const ID_LENGTH = 12;

    /** @var ObjectsService */
    private $objectsService;

    /** @var RandomProvider */
    private $randomProvider;

    /**
     * $pathPrefix gets prepended to all generated id paths
     *
     * It should not have a leading or a trailing slash.
     * @var string
     */
    private $pathPrefix;

    public function __construct(ObjectsService $objectsService, RandomProvider $randomProvider, $pathPrefix)
    {
        $this->objectsService = $objectsService;
        $this->randomProvider = $randomProvider;
        $this->pathPrefix = $pathPrefix;
    }

    /**
     * Generates a new unique ActivityPub id
     *
     * Ids look like "https://$host/$path/$randomString"
     * @param Request $request The current request
     * @param string $path The path for the the id URL, just before the random string
     *   and after the path prefix. Default: "object"
     * @return string The new id
     */
    public function getId(Request $request, $path = 'objects')
    {
        $baseUri = $request->getSchemeAndHttpHost();
        if ( !empty( $path ) ) {
            $baseUri = $baseUri . "/{$this->pathPrefix}/$path";
        }
        $rnd = $this->randomProvider->randomString( self::ID_LENGTH );
        $id = $baseUri . "/$rnd";
        $existing = $this->objectsService->query( array( 'id' => $id ) );
        while ( count( $existing ) > 0 ) {
            $rnd = $this->randomProvider->randomString( self::ID_LENGTH );
            $id = $baseUri . "/$rnd";
            $existing = $this->objectsService->query( array( 'id' => $id ) );
        }
        return $id;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Nzk0NzQ5MTEzMzU3NjA0NiA4MTYxNjc3NzcxODQ0NjgyIDY2MzM2MjM3MjEwNzM2ODA=