app/reducers/voteReducer.jsx

import moment from 'moment';
import _ from 'lodash';

// - Import action types
import * as types from 'actionTypes';

//  Default state
let defaultState = {
    postVotes: {},
    loaded: false
};


/**
 * Vote actions
 * @param {object} state 
 * @param {object} action 
 */
export var voteReducer = (state = defaultState, action) => {
    let { payload } = action;
    switch (action.type) {
        /* _____________ CRUD _____________ */
        case types.ADD_VOTE:
            return {
                ...state,
                postVotes: {
                    ...state.postVotes,
                    [payload.postId]: {
                        ...state.postVotes[payload.postId],
                        [payload.id]: {
                            ...payload.vote
                        }
                    }
                }
            };
        case types.ADD_VOTE_LIST:
            return {
                ...state,
                postVotes: {
                    ...payload
                },
                loaded: true
            };
        case types.DELETE_VOTE:
            let parsedVotes = {};
            if (state.postVotes[payload.postId])
                Object.keys(state.postVotes[payload.postId]).map((id) => {
                    if (id !== payload.id) {
                        _.merge(parsedVotes, { [id]: { ...state.postVotes[payload.postId][id] } });
                    }
                });
            return {
                ...state,
                postVotes: {
                    ...state.postVotes,
                    [payload.postId]: {
                        ...parsedVotes
                    }
                }
            };
        case types.CLEAR_ALL_DATA_VOTE:
            return defaultState;
        default:
            return state;
    }
}