@phema/cql-execution/lib/elm/conditional.js

An execution framework for the Clinical Quality Language (CQL)

"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; 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 _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

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 _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 _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

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

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

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }

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

var _require = require('./expression'),
    Expression = _require.Expression;

var _require2 = require('./builder'),
    build = _require2.build;

var _require3 = require('../util/comparison'),
    equals = _require3.equals; // TODO: Spec lists "Conditional", but it's "If" in the XSD


var If = /*#__PURE__*/function (_Expression) {
  _inherits(If, _Expression);

  var _super = _createSuper(If);

  function If(json) {
    var _this;

    _classCallCheck(this, If);

    _this = _super.call(this, json);
    _this.condition = build(json.condition);
    _this.th = build(json.then);
    _this.els = build(json.else);
    return _this;
  }

  _createClass(If, [{
    key: "exec",
    value: function exec(ctx) {
      if (this.condition.execute(ctx)) {
        return this.th.execute(ctx);
      } else {
        return this.els.execute(ctx);
      }
    }
  }]);

  return If;
}(Expression);

var CaseItem = function CaseItem(json) {
  _classCallCheck(this, CaseItem);

  this.when = build(json.when);
  this.then = build(json.then);
};

var Case = /*#__PURE__*/function (_Expression2) {
  _inherits(Case, _Expression2);

  var _super2 = _createSuper(Case);

  function Case(json) {
    var _this2;

    _classCallCheck(this, Case);

    _this2 = _super2.call(this, json);
    _this2.comparand = build(json.comparand);
    _this2.caseItems = json.caseItem.map(function (ci) {
      return new CaseItem(ci);
    });
    _this2.els = build(json.else);
    return _this2;
  }

  _createClass(Case, [{
    key: "exec",
    value: function exec(ctx) {
      if (this.comparand) {
        return this.exec_selected(ctx);
      } else {
        return this.exec_standard(ctx);
      }
    }
  }, {
    key: "exec_selected",
    value: function exec_selected(ctx) {
      var val = this.comparand.execute(ctx);

      var _iterator = _createForOfIteratorHelper(this.caseItems),
          _step;

      try {
        for (_iterator.s(); !(_step = _iterator.n()).done;) {
          var ci = _step.value;

          if (equals(ci.when.execute(ctx), val)) {
            return ci.then.execute(ctx);
          }
        }
      } catch (err) {
        _iterator.e(err);
      } finally {
        _iterator.f();
      }

      return this.els.execute(ctx);
    }
  }, {
    key: "exec_standard",
    value: function exec_standard(ctx) {
      var _iterator2 = _createForOfIteratorHelper(this.caseItems),
          _step2;

      try {
        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
          var ci = _step2.value;

          if (ci.when.execute(ctx)) {
            return ci.then.execute(ctx);
          }
        }
      } catch (err) {
        _iterator2.e(err);
      } finally {
        _iterator2.f();
      }

      return this.els.execute(ctx);
    }
  }]);

  return Case;
}(Expression);

module.exports = {
  Case: Case,
  CaseItem: CaseItem,
  If: If
};