<?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:----NDg1MDcwMTEyOTQ0Nzg2NSAzNDUyNTk1NjA4MjU1OTYwIDE5OTk1NDk2NzgzNjc3MTI=