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rx-firebase-store

v1.2.2

Published

This package is deprecated. rx-basic-store can be used with a firebase dataApi. An example can be found [here](https://github.com/Marcelh1983/rx-basic-store/blob/main/packages/example/src/app/api-examples/firebase-api.ts)

Downloads

24

Readme

=== deprecated ===

This package is deprecated. rx-basic-store can be used with a firebase dataApi. An example can be found here

rx-firebase-store

Auto store state using a simple reactive store with state management using RxJs. Can be used in React but will also work with other frameworks.

Created to seperate state management from the UI components without a lot of boilerplate code.

Inspired by this blog and the names of the events are inspired by ngxs

Examples

Here a demo and the code

init

To init firebase (you can use the store without firebase for e.g. storybook or unittests in that case you don't have to initFirebase).

  const initStore = (options: FirebaseOptions, region?: Region, syncOptions?: SyncOptions)
  • options: FirebaseOptions
  • region: used to configure the region of the functions
  • syncOptions: if logOptions are not null, all actions are logged to firebase.
    • collectionName: the collection where actions are logged. can be a string or function. A function can be useful wehn actions where userId is part of the collection name and userId is not set before the store is initialized.
    • addUserId: if true; added uuid of the user in the createdBy field.
    • logAction?: boolean; (default: true). If all actions are logged; it can be disabled for a single store.

example

  initStore(environment.firebase, 'europe-west1', {
    collectionName,
    addUserId: true,
  });

To log all actions to firebase use the logOptions.

create

// creates a new store
const store = createStore<ActivityStateModel>(initialState, !environment.production);

In reactJs the store can be mapped to the component state like this:

export function MyComponent() {
  const [state, setState] = useState(store.currentState());

  useEffect(() => {
    const subs = store.subscribe(setState);
    store.dispatch(new LoadAction());
    return subs.unsubscribe;
  }, []);

actions

Create an action that implements StoreAction<T, M>

export class LoadAction implements StoreAction<StateModel, never> {
    type = "LOAD";
    async execute(ctx: StateContext<StateModel>): Promise<StateModel> {
        if (ctx.getState().users.length === 0) {
            ctx.patchState({ loading: true });
            const users = (await axios.get<ApiResponse>('https://randomuser.me/api/?results=20')).data.results;
            return ctx.patchState({ loading: false, users });
        }
    }
}

API

Store:

  • constructor: (initialState: T = The initial state, devTools: boolean = connect to redux devTools)
  • addCallback: (callback: (action: ActionType<T, unknown>, oldState: T, newState: T, context: Map<string, unknown>) => void)=> void can be to add a callback function that captures all actions. For example to log all actions to the console or database.
  • dispatch: (action: StoreAction<T, unknown>) => Promise: dispatches an action and return a promise with the new state
  • currentState: returns the current state.
  • asObservable: return an observable of T
  • overrideSyncOptions = (newSyncOptions: Partial): can be used to change sync options after it is created

ctx: StateContext

  • getContext(name: string): gets the context that is added while creating the store. E.g. use to access History *

  • dispatch: (action: StoreAction<Partial, unknown>) => Promise: dispatches an action and return a promise with the new state

  • getState: gets the current state.

  • setState: set the entire new state.

  • patchState: set only the changed properties of the state, these will be merged with the current state.

  • Firebase functions:

    • functions: Functions
    • firestore: Firestore;
    • storage: FirebaseStorage;
    • auth: Auth;
  • To use getContext() you have to set the dependency somewhere where it is available:
  setStoreContext([
    { name: 'history', dependency: useHistory() }
  ])

In the action you can use:

  const history = ctx.getContext<History>('history');