sudoscientist-js-frontend/src/components/AuthMenu.js

import React, { Component } from 'react';

import { connect } from 'react-redux';
import { userLogin } from '../actions';

class AuthMenu extends Component {
  constructor (props) {
    super(props)

    this.state = {
        user_authed: false,
        where_in_auth_menu: "requestUsername",
        username: "",
        password: "",
        email: ""
    }

    this.handleInputChange = this.handleInputChange.bind(this)

    this.handleEmailRequestForAccountCreation = this.handleEmailRequestForAccountCreation.bind(this)

    this.handlePasswordForLogin = this.handlePasswordForLogin.bind(this)
    this.handlePasswordForAccountCreation = this.handlePasswordForAccountCreation.bind(this)

    this.handleLogin = this.handleLogin.bind(this)
    this.handleCreateAccount = this.handleCreateAccount.bind(this)

    this.authMenu = this.authMenu.bind(this)

  }


  handleInputChange(event) {
    const target = event.target;
    const value = target.value;
    const name = target.name;

    this.setState({
      [name]: value
    });
  }

  handleEmailRequestForAccountCreation() {
    this.setState(state => ({
      where_in_auth_menu: "requestEmail",
      auth_menu_visible: true,
    }));
  }

  handlePasswordForLogin() {
    this.setState(state => ({
      where_in_auth_menu: "requestPasswordForLogin",
      auth_menu_visible: true,
    }));
  }

  handlePasswordForAccountCreation() {
    this.setState(state => ({
      where_in_auth_menu: "requestPasswordForCreation",
      auth_menu_visible: true,
    }));
  }

  handleLogin() {
      this.props.userLogin(this.state.username, this.state.password)
      this.setState(state => ({
        auth_menu_visible: false,
      }));
  }

  handleCreateAccount() {
    this.setState(state => ({
      where_in_auth_menu: "requestPasswordForCreation",
      auth_menu_visible: true,
    }));
  }

  authMenu() {
    if (!this.props.auth_menu_visible) {
        return null;
    }
    const { username, password, email } = this.state;
    switch(this.state.where_in_auth_menu) {
      case 'requestUsername':
        return (
          <div className="ui menu dropdown" style={{display: "inline"}}>
            <div className="ui left icon input">
              <input
                type="text"
                placeholder="Username"
                name="username"
                value={username}
                onChange={this.handleInputChange}
            ></input>
              <i className="users icon"></i>
            </div>
            <div className="fluid ui buttons">
              <button onClick={this.handleEmailRequestForAccountCreation} className="blue ui button">Sign Up</button>
              <div className="or"></div>
              <button onClick={this.handlePasswordForLogin} className="ui teal button">Sign In</button>
            </div>
          </div>
       )
      case 'requestPasswordForLogin':
        return (
          <div className="ui menu dropdown" style={{display: "inline"}}>
            <div className="ui left icon input">
              <input
                type={"password"}
                placeholder="Password"
                name="password"
                value={password}
                onChange={this.handleInputChange}
              ></input>
              <i className="lock icon"></i>
            </div>
            <button onClick={this.handleLogin} className="fluid ui positive button">Log In</button>
          </div>
        )
      case 'requestEmail':
        return (
          <div className="ui menu dropdown" style={{display: "inline"}}>
            <div className="ui left icon input">
              <input
                type="text"
                placeholder="email@address.tld"
                name="email"
                value={email}
                onChange={this.handleInputChange}
              ></input>
              <i className="mail icon"></i>
            </div>
            <button onClick={this.handlePasswordForAccountCreation} className="fluid ui teal button">Next</button>
          </div>
        )
      case 'requestPasswordForCreation':
        return (
          <div className="ui menu dropdown" style={{display: "inline"}}>
            <div className="ui left icon input">
              <input
                type={"password"}
                placeholder="Password"
                name="password"
                value={password}
                onChange={this.handleInputChange}
              ></input>
              <i className="lock icon"></i>
            </div>
            <button onClick={this.handleCreateAccount} className="fluid ui positive button">Create Account!</button>
          </div>
        )
      default:
        return null;
    }
  }

  render() {
    return (
      this.authMenu(this.state.auth_menu_visible)
    )
  }
}

const mapStateToProps = (state) => {
    return {
        username: state.username,
    };
}
export default connect(
    mapStateToProps,
    { userLogin }
)(AuthMenu);