Helpers for hash reducers

hash-reducer-helpers.js

const update = (id, hash, changes) => {
  const newHash = hash;
  const updateEntity = { ...newHash[id], ...changes };
  newHash[id] = updateEntity;
  return newHash;
};

const replace = (id, nextEntity, hash) => {
  let newHash = hash;
  newHash = remove(id, newHash);
  newHash = add(nextEntity, newHash);
  return newHash;
};

const remove = (id, hash) => {
  const newHash = hash;
  delete newHash[id];
  return newHash;
};

const add = (entity, hash) => {
  const newHash = hash;
  newHash[entity.id] = entity;
  return newHash;
};