app.metareducers.ts

import { isNotEmpty } from './shared/empty.util';
import { StoreActionTypes } from './store.actions';

// crude temporary ngrx debugger for use until
// https://github.com/ngrx/platform/issues/97 is fixed
let actionCounter = 0;

export function debugMetaReducer(reducer) {
  return (state, action) => {
    if (isNotEmpty(console.debug)) {
      actionCounter++;
      console.debug('@ngrx action', actionCounter, action.type);
      console.debug('state', state);
      console.debug('action', action);
      console.debug('------------------------------------');
    }

    return reducer(state, action);
  }
}

export function universalMetaReducer(reducer) {
  return (state, action) => {
    switch (action.type) {
      case StoreActionTypes.REHYDRATE:
        state = Object.assign({}, state, action.payload);
        break;
      case StoreActionTypes.REPLAY:
        break;
      default:

        return reducer(state, action);
    }
  }
}

export const appMetaReducers = [debugMetaReducer, universalMetaReducer];