React Class Component : src/pages/heroes/Heroes.js

Heroes.js

import React, { Component } from "react";
import NewItemForm from "../../common-components/NewItemForm";
import {
  deleteHero,
  loadHeroes,
  postHero
} from "../../store/hero/hero-actions";
import { connect } from "react-redux";
import { Link } from "react-router-dom";

class Heroes extends Component {
  state = {
    hero: {
      id: "",
      firstName: "",
      lastName: "",
      house: "",
      knownAs: ""
    },
    isShowNewItemForm: false
  };

  async componentDidMount() {
    await this.props.onLoadData(); // Dispatches the loadHeroes action
  }

  removeItem = async (id, name) => {
    const isConfirmed = window.confirm(`Delete ${name}?`);
    if (!isConfirmed) return;

    await this.props.onRemoveHero(id); // Takes an id to be dispatched. This will delete the hero
  };

  onChange = ({ currentTarget: input }) => {
    const newHero = { ...this.state.hero };
    const { name, value } = input;
    newHero[name] = value;
    this.setState({ hero: newHero });
  };

  onSubmit = event => {
    event.preventDefault();
    
    /*
    onAddHero takes a hero object to be dispatched.
    If successful, it sends a dispatch to load again the heroes array
    */
    this.props.onAddHero(this.state.hero).then(() => this.props.onLoadData());
    // .then(() => this.props.onLoadData());
    // is not necessary if you don't care about the id of the new created item
    // An id is required when deleting or getting an item

    const { isShowNewItemForm } = this.state;
    this.setState({ isShowNewItemForm: !isShowNewItemForm });
  };

  showNewItemForm = () => {
    const { isShowNewItemForm } = this.state;
    this.setState({ isShowNewItemForm: !isShowNewItemForm });
  };

  render() {
    const { error } = this.props;
    return (
      <>
        <NewItemForm
          isShowNewItemForm={this.state.isShowNewItemForm}
          handleOnChange={this.onChange}
          handleOnSubmit={this.onSubmit}
          handleShowNewItemForm={this.showNewItemForm}
        />
        {error && (
          <div
            className="col-3 col-md-3 offset-9 alert alert-info"
            role="alert"
          >
            Something wrong happened: {error}
          </div>
        )}
        {this.props.heroes.map(item => ( // the array heroes here is the array heroes from your store
          <div key={item.id} className="card mt-3" style={{ width: "auto" }}>
            <div className="card-header">
              <h3 className="card-title">
                {item.firstName} {item.lastName}
              </h3>
              <h5 className="card-subtitle mb-2 text-muted">{item.house}</h5>
              <p className="card-text">{item.knownAs}</p>
            </div>
            <section className="card-body">
              <div className="row">
                <button
                  onClick={() => this.removeItem(item.id, item.firstName)}
                  className="btn btn-outline-danger card-link col text-center"
                >
                  <span className="fas fa-eraser  mr-2" />
                  Delete
                </button>
                <Link
                  to={`/edit-hero/${item.id}`}
                  className="btn btn-outline-primary card-link col text-center"
                >
                  <span className="fas fa-edit  mr-2" />
                  Edit
                </Link>
              </div>
            </section>
          </div>
        ))}
      </>
    );
  }
}

const mapStateToProps = state => {
  return state.heroState;
};

const mapDispatchToProps = dispatch => {
  return {
    onLoadData: () => dispatch(loadHeroes()), // onLoadDate will dispatch loadHeroes when gets invoke
    onRemoveHero: id => dispatch(deleteHero(id)), // onRemoveHero will dispatch deleteHero when gets invoke
    onAddHero: hero => dispatch(postHero(hero)) // onAddHero will dispatch postHero when gets invoke
  };
};

/*
  connects the store's dispatches and states to the props of this class
*/
export default connect(
  mapStateToProps,
  mapDispatchToProps
)(Heroes);