@sanjagh/option/lib/index.js

Out of the box solution for writing null-safe javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.none = none;
exports.some = some;
exports.option = option;
exports["default"] = exports.Some = exports.None = void 0;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var None =
/*#__PURE__*/
function () {
  function None() {
    _classCallCheck(this, None);
  }

  _createClass(None, [{
    key: "isDefined",
    value: function isDefined() {
      return false;
    }
  }, {
    key: "isEmpty",
    value: function isEmpty() {
      return true;
    }
  }, {
    key: "get",
    value: function get() {
      throw new Error('NO VALUE');
    }
  }, {
    key: "getOrElse",
    value: function getOrElse(defaultValue) {
      return defaultValue;
    }
  }, {
    key: "default",
    value: function _default(defaultValue) {
      return this.getOrElse(defaultValue);
    }
  }, {
    key: "getOrNull",
    value: function getOrNull() {
      return null;
    }
  }, {
    key: "getOrUndefined",
    value: function getOrUndefined() {
      return undefined;
    }
  }, {
    key: "map",
    value: function map(_m) {
      return new None();
    }
  }, {
    key: "filter",
    value: function filter(_p) {
      return new None();
    }
  }, {
    key: "reject",
    value: function reject(_p) {
      return new None();
    }
  }, {
    key: "bind",
    value: function bind(_m) {
      return new None();
    }
  }, {
    key: "flatMap",
    value: function flatMap(m) {
      return this.bind(m);
    }
  }, {
    key: "fold",
    value: function fold(initialValue, f) {
      return this.map(f).getOrElse(initialValue);
    }
  }, {
    key: "foldLeft",
    value: function foldLeft(initialValue, _f) {
      return initialValue;
    }
  }, {
    key: "foldRight",
    value: function foldRight(initialValue, _f) {
      return initialValue;
    }
  }, {
    key: "forEach",
    value: function forEach(_f) {}
  }]);

  return None;
}();

exports.None = None;

var Some =
/*#__PURE__*/
function () {
  function Some(value) {
    _classCallCheck(this, Some);

    this.value = value;
  }

  _createClass(Some, [{
    key: "isDefined",
    value: function isDefined() {
      return true;
    }
  }, {
    key: "isEmpty",
    value: function isEmpty() {
      return false;
    }
  }, {
    key: "get",
    value: function get() {
      return this.value;
    }
  }, {
    key: "getOrElse",
    value: function getOrElse(_defaultValue) {
      return this.get();
    }
  }, {
    key: "default",
    value: function _default(_defaultValue) {
      return this.getOrElse();
    }
  }, {
    key: "getOrNull",
    value: function getOrNull() {
      return this.get();
    }
  }, {
    key: "getOrUndefined",
    value: function getOrUndefined() {
      return this.get();
    }
  }, {
    key: "map",
    value: function map(m) {
      return new Some(m(this.get()));
    }
  }, {
    key: "filter",
    value: function filter(p) {
      return p(this.get()) ? new Some(this.get()) : new None();
    }
  }, {
    key: "reject",
    value: function reject(p) {
      return this.filter(function (x) {
        return !p(x);
      });
    }
  }, {
    key: "bind",
    value: function bind(m) {
      return m(this.get());
    }
  }, {
    key: "flatMap",
    value: function flatMap(m) {
      return this.bind(m);
    }
  }, {
    key: "fold",
    value: function fold(initialValue, f) {
      return this.map(f).getOrElse(initialValue);
    }
  }, {
    key: "foldLeft",
    value: function foldLeft(initialValue, f) {
      return f(initialValue, this.get());
    }
  }, {
    key: "foldRight",
    value: function foldRight(initialValue, f) {
      return f(this.get(), initialValue);
    }
  }, {
    key: "forEach",
    value: function forEach(f) {
      f(this.get());
    }
  }]);

  return Some;
}();

exports.Some = Some;

function none() {
  return new None();
}

function some(value) {
  return new Some(value);
}

function option(value) {
  return value == null ? none() : some(value);
}

var Opt = {
  None: None,
  Some: Some,
  none: none,
  some: some,
  option: option
};
exports["default"] = Opt;