@difizen/mana-observable/lib/notifier.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Notifier = void 0;
var _manaCommon = require("@difizen/mana-common");
var _asyncEvent = require("./async-event");
var _config = require("./config");
var _core = require("./core");
var _notifiable = require("./notifiable");
var _utils = require("./utils");
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
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, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : String(i); }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); } /* eslint-disable @typescript-eslint/no-explicit-any */
var Notifier = exports.Notifier = /*#__PURE__*/function () {
  function Notifier() {
    _classCallCheck(this, Notifier);
    _defineProperty(this, "changedEmitter", new _asyncEvent.AsyncEmitter());
    _defineProperty(this, "disposed", false);
  }
  _createClass(Notifier, [{
    key: "onChange",
    get: function get() {
      if (_config.ObservableConfig.async) {
        return this.onChangeAsync;
      }
      return this.onChangeSync;
    }
  }, {
    key: "onChangeAsync",
    get: function get() {
      return this.changedEmitter.eventAsync;
    }
  }, {
    key: "onChangeSync",
    get: function get() {
      return this.changedEmitter.event;
    }
  }, {
    key: "dispose",
    value: function dispose() {
      this.changedEmitter.dispose();
      this.disposed = true;
    }
  }, {
    key: "once",
    value: function once(trigger, context) {
      var toDispose = this.onChange(function (e) {
        trigger(e.target, e.prop);
        toDispose.dispose();
      }, context);
      return toDispose;
    }
  }, {
    key: "notify",
    value: function notify(target, prop) {
      this.changedEmitter.fire({
        target: target,
        prop: prop
      });
      if (prop) {
        Notifier.trigger(target);
      }
    }
  }], [{
    key: "trigger",
    value: function trigger(target, prop) {
      var exist = Notifier.get(target, prop);
      if (exist) {
        exist.notify(target, prop);
      }
    }
  }, {
    key: "getOrCreate",
    value: function getOrCreate(target, prop) {
      var notifier = _notifiable.Notifiable.getNotifier(target);
      if (notifier) {
        return notifier;
      }
      var origin = _utils.Observability.getOrigin(target);
      var exist = Notifier.get(origin, prop);
      if (exist && !exist.disposed) {
        return exist;
      }
      var ntf = new Notifier();
      Notifier.set(origin, ntf, prop);
      return ntf;
    }
  }, {
    key: "find",
    value: function find(target, prop) {
      if (_utils.Observability.marked(target, prop) || _utils.Observability.canBeObservable(target)) {
        return Notifier.getOrCreate(target, prop);
      }
      return undefined;
    }
  }, {
    key: "get",
    value: function get(target, property) {
      if (property === undefined) {
        return Reflect.getMetadata(_core.ObservableSymbol.Notifier, target);
      } else {
        return Reflect.getMetadata(_core.ObservableSymbol.Notifier, target, property);
      }
    }
  }, {
    key: "set",
    value: function set(target, notifier, property) {
      if (property === undefined) {
        Reflect.defineMetadata(_core.ObservableSymbol.Notifier, notifier, target);
      } else {
        Reflect.defineMetadata(_core.ObservableSymbol.Notifier, notifier, target, property);
      }
    }
  }, {
    key: "once",
    value: function once(notifier, key, onChange) {
      var toDispose = _utils.Observability.getDisposable(key, notifier);
      if (toDispose) {
        toDispose.dispose();
      }
      var disposable = notifier.once(function () {
        onChange();
      });
      _utils.Observability.setDisposable(key, disposable, notifier);
    }

    /**
     * Get event from target
     * @param target
     * @param prop
     * @param async false by default
     * @returns
     */
  }, {
    key: "toEvent",
    value: function toEvent(target, prop) {
      var async = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
      var notifier = Notifier.find(target, prop);
      if (notifier) {
        if (async === null) {
          return notifier.onChange;
        }
        if (async) {
          return notifier.onChangeAsync;
        } else {
          return notifier.onChangeSync;
        }
      }
      return _manaCommon.Event.None;
    }
  }]);
  return Notifier;
}();