<?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:----OTIzMzYxMTEwNTY2NzI0NCA1MDAwNDM4ODE0MzExMDYyIDEyNjI3NzczOTA4MDgxOTI=