dreamstate/esm/development/core/utils/collectProtoChainMetadata.js

Store management library based on react context and observers

import { DreamstateError } from '../error/DreamstateError.js';
import { ContextManager } from '../management/ContextManager.js';
import { EDreamstateErrorCode } from '../../types/error.js';

/**
 * Collects metadata from the prototype chain of a given context manager class.
 *
 * This function resolves issues related to class inheritance, particularly when dealing with query
 * and signal handlers. It traverses the prototype chain of the provided context manager class,
 * gathering metadata and ensuring all inherited behaviors are properly registered.
 *
 * @template T - The type of the context manager constructor.
 * @template D - The type of the metadata stored in the registry.
 * @param {T} target - The base context manager class from which metadata should be collected.
 * @param {WeakMap<T, D>} registry - A weak map registry that holds metadata for context manager classes.
 * @returns {D} The collected metadata for the given context manager.
 */
function collectProtoChainMetadata(target, registry) {
  if (target.prototype instanceof ContextManager) {
    var metadata = [];
    var current = target;
    while (current !== ContextManager) {
      metadata.push(registry.get(current));
      current = Object.getPrototypeOf(current);
    }
    /**
     * todo: Remove duplicates from an array?
     * todo: If overriding signal handling methods and adding @OnSignal, it may cause issues with double call of method.
     */
    return metadata.reduce(function (pr, it) {
      if (it) {
        return pr.concat(it);
      } else {
        return pr;
      }
    }, []);
  } else {
    throw new DreamstateError(EDreamstateErrorCode.INCORRECT_PARAMETER, "Failed to collect metadata of class that is not extending ContextManager.");
  }
}

export { collectProtoChainMetadata };