jsmoo/lib/does.js

JavaScript Minimalist Object Orientation

'use strict';

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

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

// Merges all the attributes from the role to the base (which can be a Role or a Jsmoo class)
// it does not coppy functions defined on the Role and in the Base in favor of the Base and also the internal functions
function mergeAttributes(_ref) {
  var base = _ref.base;
  var role = _ref.role;
  var isJsmoo = _ref.isJsmoo;

  //TODO: See if some one has another work arround for Symbols
  //Object.getOwnPropertyNames(role).concat(Object.getOwnPropertySymbols(role)).forEach((prop) => {
  Object.getOwnPropertyNames(role).forEach(function (prop) {
    if (!prop.match(/^(?:_has_|_attributes_|constructor|prototype|arguments|caller|name|bind|call|apply|toString|length)$/) && !base[prop]) {
      Object.defineProperty(base, prop, Object.getOwnPropertyDescriptor(role, prop));
    }
  });
  if (isJsmoo && role.prototype._has_) {
    Object.keys(role.prototype._has_).forEach(function (attr) {
      base.has(_defineProperty({}, attr, role.prototype._has_[attr]));
    });
  }
}

// Validates that the Role is infact a Role and if the THIS object is a Jsmoo class
function composeRole(role) {
  if (Object.getPrototypeOf(role).name !== 'Role') throw new TypeError('Only Roles can be composed');

  var isJsmoo = Object.getPrototypeOf(this).name === 'Jsmoo';
  [{ base: this, role: role, isJsmoo: isJsmoo }, { base: this.prototype, role: role.prototype }].forEach(function (proto) {
    return mergeAttributes(proto);
  });
}

// The function exported to Jsmoo.js habilitate the Role composition
function does() {
  var _this = this;

  for (var _len = arguments.length, roles = Array(_len), _key = 0; _key < _len; _key++) {
    roles[_key] = arguments[_key];
  }

  roles.forEach(function (r) {
    return composeRole.bind(_this, r)();
  });
}

exports.default = does;