src/selectors/columns.js

import { createSelector } from 'reselect';

const columnsSelector = state => {
  return state.columns || {};
};

const getContainerColumns = key =>
  createSelector(
    columnsSelector,
    columns => columns[key] || {}
  );

const makeColumnByKeyAndIdSelector = (key, id) =>
  createSelector(
    getContainerColumns(key),
    columns => {
      return columns[id] || {};
    }
  );

const isInitSelector = (key, id) =>
  createSelector(
    makeColumnByKeyAndIdSelector(key, id),
    column => {
      return column.isInit;
    }
  );

const isVisibleSelector = (key, id) =>
  createSelector(
    makeColumnByKeyAndIdSelector(key, id),
    column => {
      return column.visible;
    }
  );

const isDisabledSelector = (key, id) =>
  createSelector(
    makeColumnByKeyAndIdSelector(key, id),
    column => {
      return column.disabled;
    }
  );

export {
  getContainerColumns,
  isVisibleSelector,
  isInitSelector,
  isDisabledSelector,
};