<?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:----OTczODk5ODAwNzcyMDczOSA2NDUxNDI0Njc5Mzg1MTI2IDMwOTgxNjU4ODEwNzU5Mzk=