state

state.s.ts

import { Injectable } from '@angular/core';
import { BehaviorSubject, Subscription } from 'rxjs';
import { get, set, assign, merge, isEmpty } from 'lodash';
import { IS_DEV } from '../constants';
import { ResMsgHandlerS } from './res-msg-handler.s';

export interface IStateOpts {
  initState?: Object;
}

@Injectable()
export class StateS {
  state;
  mh;

  constructor(mh: ResMsgHandlerS) {
    this.mh = mh;
    this.state = new BehaviorSubject({});
  }

  subscribe(next, error?, complete?): Subscription {
    return this.state.distinctUntilChanged().share().subscribe(next, error, complete);
  }

  get(path?: string, defaultValue?: any) {
    return isEmpty(path)
      ? this.state.getValue()
      : get(this.state.getValue(), path, defaultValue);
  }

  set(path: string, value: any) {
    this.state.next(set(this.get(), path, value));
    return this;
  }

  assign(obj: Object) {
    this.state.next(assign({}, this.get(), obj));
    return this;
  }

  merge(obj: Object) {
    this.state.next(merge({}, this.get(), obj));
    return this;
  }

  // fetch initial state from api
  populate() {
  }

  // stuff u do after initial state set
  afterPopulate() {
  }

  // set state to an empty object
  clear() {
    this.state.next({});
  }

  // stuff u do b4 freeing up allocated mem
  destroy() {
  }

}