dashp/dist/when.js

Utilities for monadic promises.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.unless = exports.when = exports.unlessElse = exports.whenElse = void 0;

var _Future = require("./Future");

var _curry = require("./internal/curry");

var _identity = _interopRequireDefault(require("./internal/identity"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const whenElse = (0, _curry.curry4)("whenElse", (predicate, consequent, alternative, p) => {
  const branch = x => (0, _Future.of)(predicate(x)).then(bool => bool === true ? consequent(x) : alternative(x));

  return (0, _Future.of)(p).then(branch);
});
exports.whenElse = whenElse;
const unlessElse = (0, _curry.curry4)("unlessElse", (predicate, consequent, alternative, p) => whenElse(predicate, alternative, consequent, p));
exports.unlessElse = unlessElse;
const when = (0, _curry.curry3)("when", (predicate, consequent, p) => whenElse(predicate, consequent, _identity.default, p));
exports.when = when;
const unless = (0, _curry.curry3)("unless", (predicate, consequent, p) => unlessElse(predicate, consequent, _identity.default, p));
exports.unless = unless;
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