import { filter, map } from 'lodash/fp';
import { $, isSomething } from './index';

export const stringNotEmpty = s => isSomething(s) && s.trim().length > 0;

export const makerule = (field, error, isValid) => ({ field, error, isValid });

export const validationError = (rule, item) => ({ ...rule, item });

export const applyRuleSet = ruleSet => itemToValidate => $(ruleSet, [
  map(applyRule(itemToValidate)),
  filter(isSomething),
]);

export const applyRule = itemTovalidate => rule => (rule.isValid(itemTovalidate)
  ? null
  : validationError(rule, itemTovalidate));