一个 NGRX 商店，多个 Angular 应用程序

Question

所以我对此有点不以为然。希望你能向我道歉。

我正在尝试将多个 Angular 元素（Web 组件）插入到 Prestashop 模块中，即 PHP。由于没有一个包含许多模块的 Angular 应用程序，我无法使用商店将数据从一个元素发送到另一个元素。

我曾想过创建一个库来负责创建 NGRX 存储，并将其保存到 window.store（例如），以便多个独立的 Angular 应用程序可以使用同一个存储。这里的问题是我必须在许多 Angular 元素中调用库，所以我在构造函数中注入了不同的存储。我说的对吗？

例如：

import {
  ActionReducer,
  ActionReducerFactory,
  ActionReducerMap,
  ActionReducerMap,
  ActionsSubject,
  ReducerManager,
  ReducerManagerDispatcher,
  StateObservable,
  Store,
} from '@ngrx/store'
import { Observable } from 'rxjs';

const storeName = 'store'

@Injectable({
  providedIn: 'root'
})
export class StoreSyncService {

  store: any = null

  // option 1 constructor:
  // are we, when including the library in others angular apps, instantiating store over and over?
  constructor(private store: Store) {
     if (window[storeName]) {
      this.store = window[storeName]
    } else{
      window[storeName] = this.store
    }
  }

  // option 2 constructor (please apologise me as I don't know how injection works very well).
  // Any link to clarify this is welcome
  constructor() {
    if (window[storeName]) {
      this.store = window[storeName]
    } else{
      const stateObservable$: StateObservable = new Observable()
      const actionsObserver: ActionsSubject = new ActionsSubject()

      const dispatcher: ReducerManagerDispatcher = new ActionsSubject()
      const initialState = {}
      const reducers: ActionReducerMap<any, any> = {}
      const reducerFactory: ActionReducerFactory<any, any> =  whatever

      const reducerManager: ReducerManager = new ReducerManager(dispatcher, initialState, reducers, reducerFactory)
      this.store = new Store(stateObservable$, actionsObserver, reducerManager)
      window[storeName] = this.store
    }
  }

  public getStore = () => this.store

  public addReducer = (reducerName: string, reducer: ActionReducer<any>) => this.store.addReducer(reducerName, reducer)

  public removeReducer = (reducerName: string) => this.store.removeReducer(reducerName)

}

回顾一下，如果我想在多个独立的 Angular 应用程序之间共享状态，你会怎么做？

我尝试使用 localStorage，添加事件以将 NGRX 状态与本地存储中的数据同步，反之亦然，但有时会导致无限循环，有时会出现数据不同步的边缘情况。

感谢您的帮助和理解

Answer 1

所以现在，我找到了一种解决方法来避免商店的双重实例化。使用条件注入器。

  import { Injectable, Injector } from '@angular/core';

  ...


  constructor(private injector : Injector) {
    if (window[storeName]) {
      this.store = window[storeName]
    } else{
      this.store = this.injector.get<Store>(Store);
      window[storeName] = this.store
    }
  }

我还没有测试它在独立应用程序之间共享数据。让我们希望它有效。

欢迎任何建议！！