@discipl/law-reg/dist/defaultFactResolver.js

Discipl Law and Regulation Compliance Library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.wrapWithDefault = wrapWithDefault;

/**
 * Create a default resolver and extend it's logic with additional facts and a fallback resolver. The fallback is used
 * when no other methods are available to resolve the supplied facts.
 *
 * @param {function} factResolver - Function used to resolve facts to fall back on if no other method is available
 * @param {Object} factsSupplied - Facts object
 * @return {function} Function used to resolve facts to fall back on if no other method is available
 */
function wrapWithDefault(factResolver, factsSupplied) {
  return async (fact, listNames, listIndices, possibleCreatingActions) => {
    let factsObject = factsSupplied;

    for (let i = 0; i < listNames.length; i++) {
      const listName = listNames[i];
      factsObject[listName] = factsObject[listName] ? factsObject[listName] : [];
      const listIndex = listIndices[i];
      factsObject[listName][listIndex] = factsObject[listName][listIndex] ? factsObject[listName][listIndex] : {};
      factsObject = factsObject[listName][listIndex];
    }

    let maybeCreatingAction = null;

    if (possibleCreatingActions && possibleCreatingActions.length === 1) {
      maybeCreatingAction = possibleCreatingActions[0];
    }

    const result = factsObject[fact] || maybeCreatingAction || factResolver(fact, listNames, listIndices, possibleCreatingActions);
    factsObject[fact] = await result;
    return result;
  };
}