React_Client_App_Access/node_modules/.cache/babel-loader/380abaa519cc371adcb891f68f5dfa1e.json

{"ast":null,"code":"import { getBatch } from './batch'; // encapsulates the subscription logic for connecting a component to the redux store, as\n// well as nesting subscriptions of descendant components, so that we can ensure the\n// ancestor components re-render before descendants\n\nvar nullListeners = {\n  notify: function notify() {}\n};\n\nfunction createListenerCollection() {\n  var batch = getBatch();\n  var first = null;\n  var last = null;\n  return {\n    clear: function clear() {\n      first = null;\n      last = null;\n    },\n    notify: function notify() {\n      batch(function () {\n        var listener = first;\n\n        while (listener) {\n          listener.callback();\n          listener = listener.next;\n        }\n      });\n    },\n    get: function get() {\n      var listeners = [];\n      var listener = first;\n\n      while (listener) {\n        listeners.push(listener);\n        listener = listener.next;\n      }\n\n      return listeners;\n    },\n    subscribe: function subscribe(callback) {\n      var isSubscribed = true;\n      var listener = last = {\n        callback: callback,\n        next: null,\n        prev: last\n      };\n\n      if (listener.prev) {\n        listener.prev.next = listener;\n      } else {\n        first = listener;\n      }\n\n      return function unsubscribe() {\n        if (!isSubscribed || first === null) return;\n        isSubscribed = false;\n\n        if (listener.next) {\n          listener.next.prev = listener.prev;\n        } else {\n          last = listener.prev;\n        }\n\n        if (listener.prev) {\n          listener.prev.next = listener.next;\n        } else {\n          first = listener.next;\n        }\n      };\n    }\n  };\n}\n\nvar Subscription = /*#__PURE__*/function () {\n  function Subscription(store, parentSub) {\n    this.store = store;\n    this.parentSub = parentSub;\n    this.unsubscribe = null;\n    this.listeners = nullListeners;\n    this.handleChangeWrapper = this.handleChangeWrapper.bind(this);\n  }\n\n  var _proto = Subscription.prototype;\n\n  _proto.addNestedSub = function addNestedSub(listener) {\n    this.trySubscribe();\n    return this.listeners.subscribe(listener);\n  };\n\n  _proto.notifyNestedSubs = function notifyNestedSubs() {\n    this.listeners.notify();\n  };\n\n  _proto.handleChangeWrapper = function handleChangeWrapper() {\n    if (this.onStateChange) {\n      this.onStateChange();\n    }\n  };\n\n  _proto.isSubscribed = function isSubscribed() {\n    return Boolean(this.unsubscribe);\n  };\n\n  _proto.trySubscribe = function trySubscribe() {\n    if (!this.unsubscribe) {\n      this.unsubscribe = this.parentSub ? this.parentSub.addNestedSub(this.handleChangeWrapper) : this.store.subscribe(this.handleChangeWrapper);\n      this.listeners = createListenerCollection();\n    }\n  };\n\n  _proto.tryUnsubscribe = function tryUnsubscribe() {\n    if (this.unsubscribe) {\n      this.unsubscribe();\n      this.unsubscribe = null;\n      this.listeners.clear();\n      this.listeners = nullListeners;\n    }\n  };\n\n  return Subscription;\n}();\n\nexport { Subscription as default };","map":null,"metadata":{},"sourceType":"module"}