ioredis-mock/lib/commands/sdiff.js

This library emulates ioredis by performing all operations in-memory.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.sdiff = sdiff;

var _arrayFrom = require('array-from');

var _arrayFrom2 = _interopRequireDefault(_arrayFrom);

var _es6Set = require('es6-set');

var _es6Set2 = _interopRequireDefault(_es6Set);

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

function sdiff(ours) {
  var _this = this;

  if (this.data.has(ours) && !(this.data.get(ours) instanceof _es6Set2.default)) {
    throw new Error('Key ' + ours + ' does not contain a set');
  }

  for (var _len = arguments.length, theirs = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    theirs[_key - 1] = arguments[_key];
  }

  theirs.forEach(function (key) {
    if (_this.data.has(key) && !(_this.data.get(key) instanceof _es6Set2.default)) {
      throw new Error('Key ' + key + ' does not contain a set');
    }
  });

  var ourSet = this.data.has(ours) ? this.data.get(ours) : new _es6Set2.default();
  var theirSets = theirs.map(function (key) {
    return _this.data.has(key) ? _this.data.get(key) : new _es6Set2.default();
  });
  var difference = new _es6Set2.default((0, _arrayFrom2.default)(ourSet).filter(function (ourValue) {
    return theirSets.reduce(function (isUnique, set) {
      return set.has(ourValue) ? false : isUnique;
    },
    /* isUnique */true);
  }));

  return (0, _arrayFrom2.default)(difference);
}