Function serializeServerReference

packages/react-server/src/ReactFlightServer.js:2885–2945

(
  request: Request,
  serverReference: ServerReference<any>,
)

}

function serializeServerReference(
  request: Request,
  serverReference: ServerReference<any>,
): string {
  const writtenServerReferences = request.writtenServerReferences;
  const existingId = writtenServerReferences.get(serverReference);
  if (existingId !== undefined) {
    return serializeServerReferenceID(existingId);
  }

  const boundArgs: null | Array<any> = getServerReferenceBoundArguments(
    request.bundlerConfig,
    serverReference,
  );
  const bound = boundArgs === null ? null : Promise.resolve(boundArgs);
  const id = getServerReferenceId(request.bundlerConfig, serverReference);

  let location: null | ReactFunctionLocation = null;
  if (__DEV__) {
    const error = getServerReferenceLocation(
      request.bundlerConfig,
      serverReference,
    );
    if (error) {
      const frames = parseStackTrace(error, 1);
      if (frames.length > 0) {
        const firstFrame = frames[0];
        location = [
          firstFrame[0],
          firstFrame[1],
          firstFrame[2], // The line and col of the callsite represents the
          firstFrame[3], // enclosing line and col of the function.
        ];
      }
    }
  }

  const serverReferenceMetadata: {
    id: ServerReferenceId,
    bound: null | Promise<Array<any>>,
    name?: string, // DEV-only
    env?: string, // DEV-only
    location?: ReactFunctionLocation, // DEV-only
  } =
    __DEV__ && location !== null
      ? {
          id,
          bound,
          name:
            typeof serverReference === 'function' ? serverReference.name : '',
          env: (0, request.environmentName)(),
          location,
        }
      : {
          id,
          bound,
        };
  const metadataId = outlineModel(request, serverReferenceMetadata);