aprilrd

import { Map } from "immutable";

// reducers
const INITIAL_STATE = Map({ post: null, isLoading: false });

function postReducer(state = INITIAL_STATE, action) {
  switch (action.type) {
    case "FETCHED": {
      return state.withMutations(currentState =>
        currentState.set("post", action.payload.post).set("isLoading", false),

aprilrd

interface Keyed<K, V> extends Collection<K, V>, Iterable.Keyed<K, V> { ... }
interface Map<K, V> extends Keyed<K, V> {
  set(key: K, value: V): Map<K, V>;
  setIn(keyPath: Array<any>, value: any): Map<K, V>;
  ...
}

aprilrd

// scaffolding
interface IPostStateImmutable {
  get(key: "post"): IPostImmutable | null; // IPostImmutable is also another hacky interface like IPostStateImmutable.
  get(key: "isLoading"): boolean;
  set(key: "post", value: IPostImmutable | null): IPostStateImmutable;
  set(key: "isLoading", value: boolean): IPostStateImmutable;
  withMutations(
    mutator: (mutable: IPostStateImmutable) => IPostStateImmutable,
  ): IPostStateImmutable;
}

aprilrd

import { TypedRecord, recordify } from "typed-immutable-record";
// scaffolding
interface IPostState {
  post: IPost | null;
  isLoading: boolean;
}
interface IPostStateRecordPart {
  post: IPostRecord; // this interface is created in a similar fashion.
  isLoading: boolean;
}

aprilrd

return {
  ...state,
  post: {
    ...state.post,
    author: {
      ...state.post.author,
      relation: {
        ...state.post.author.relation,
        following: true,
      },

aprilrd

// post reducer
interface IPostState
  extends Readonly<{
      postId: number | null;
      isLoading: boolean;
    }> {}

const INITIAL_STATE: IPostState = {
  postId: null,
  isLoading: false,

aprilrd

// scaffolding
interface IPostState
  extends Readonly<{
      post: IPost | null;
      isLoading: boolean;
    }> {} // this has to be a Readonly interface as well.

// reducers
const INITIAL_STATE: IPostState = {
  post: null,

aprilrd

interface Connect {
  <TStateProps = {}, TDispatchProps = {}, TOwnProps = {}, State = {}>(
    mapStateToProps: MapStateToPropsParam<TStateProps, TOwnProps, State>,
    mapDispatchToProps: MapDispatchToPropsParam<TDispatchProps, TOwnProps>,
  ): InferableComponentEnhancerWithProps<
    TStateProps & TDispatchProps & TOwnProps,
    TOwnProps
  >;
}