numenor/lib/Compiler/index.js

Customizable, safe evaluator of JavaScript-like expressions.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Compiler = void 0;

var Error = _interopRequireWildcard(require("./Error"));

var _ArrayPrototype = require("./ArrayPrototype");

var _util = require("./Evaluator/util");

var _EventEmitter2 = require("../common/EventEmitter");

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

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; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

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; }

var DefaultOptions = {
  NoUndefinedVars: false,
  NoNewVars: false,
  ImmutableContext: false,
  NoProtoAccess: true,
  ObjectPrototype: null,
  ArrayPrototype: _ArrayPrototype.ArrayPrototype,
  EnforceMarshalling: false,
  Constants: Object.create(null)
};

var Compiler =
/*#__PURE__*/
function (_EventEmitter) {
  _inherits(Compiler, _EventEmitter);

  function Compiler() {
    var _getPrototypeOf2;

    var _this;

    _classCallCheck(this, Compiler);

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

    _this = _possibleConstructorReturn(this, (_getPrototypeOf2 = _getPrototypeOf(Compiler)).call.apply(_getPrototypeOf2, [this].concat(args)));

    _defineProperty(_assertThisInitialized(_this), "compilers", new Map());

    return _this;
  }

  _createClass(Compiler, [{
    key: "compile",
    value: function compile(expression, options) {
      var _this2 = this;

      var scopeStack = [];

      var compile = function compile(expr, opts) {
        var makeEval = _this2.compilers.get(expr.type);

        if (typeof makeEval === 'undefined') {
          throw new TypeError(Error.UnknownExpression(expr));
        }

        scopeStack.push(expr.type);

        _this2.fireEvent('scope:enter', expr.type, scopeStack);

        var evaluator = makeEval(expr, opts, compile);

        _this2.fireEvent('scope:leave', expr.type, scopeStack, evaluator);

        return evaluator;
      };

      var compileOptions = _objectSpread({}, DefaultOptions, options);

      var evaluator = compile(expression, compileOptions);
      var marshallValue = (0, _util.makeValueMarshaller)(compileOptions);
      return function (context) {
        return marshallValue(evaluator(context || Object.create(null), []));
      };
    }
  }, {
    key: "setCompiler",
    value: function setCompiler(expressionType, compiler) {
      this.compilers.set(expressionType, compiler);
    }
  }]);

  return Compiler;
}(_EventEmitter2.EventEmitter);

exports.Compiler = Compiler;