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path: root/src/Controllers/RoomController.php
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<?php

namespace App\Controllers;

use App\Database;
use App\Errors\AppException;
use App\Errors\ErrorCode;
use App\Support\Parser;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\JsonResponse;

class RoomController
{
  /**
   * GET /_matrix/client/v3/directory/room/{roomAlias}
   *
   * @see https://spec.matrix.org/v1.15/client-server-api/#get_matrixclientv3directoryroomroomalias
   */
  public function resolveAlias(Request $request): Response
  {
    $alias = $request->attributes->get("roomAlias");

    $roomAlias = Parser::parseRoomAlias($alias); # TODO: on parse error => 400
    $roomId = null;

    if ($roomAlias["server"] != $_ENV["DOMAIN"]) {
      # TODO: federation API resolve
      $roomId = -1;
    }
    else {
      $room = Database::getInstance()->query(<<<SQL
        select id from rooms where name = :name
      SQL, [
        "name" => $roomAlias["name"],
      ])->fetch();

      $roomId = $room["id"] ?? null;
    }

    if (empty($roomId)) {
      throw new AppException(
        ErrorCode::NOT_FOUND,
        "Room alias $alias not found.",
        Response::HTTP_NOT_FOUND
      );
    }

    return new JsonResponse([
      "room_id" => $roomId,
      "servers" => [],
    ]);
  }
}