bakerface/combinators

/**
 * Copyright (c) 2016 Chris Baker <mail.chris.baker@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

const compose = require('../../functions/compose');
const cond = require('../../conditionals/cond');
const create = require('../../errors/create');
const toss = require('../../errors/toss');
const not = require('../../predicates/not');
const match = require('../../strings/match');

const UnexpectedResolveError = create('UnexpectedResolveError');
const UnexpectedRejectError = create('UnexpectedRejectError');
const resolve = toss(UnexpectedResolveError);

function mismatch(regex) {
  return compose(not, match(regex));
}

function reject(expected) {
  return cond(mismatch(expected), toss(UnexpectedRejectError));
}

module.exports = function (regex) {
  return function (promise) {
    return promise.then(resolve, reject(regex));
  };
};