tcc-vamos-frontend/src/pages/Login.tsx

import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar
} from "@ionic/react";
import React, { useContext, useState } from "react";
import { IonGrid, IonRow, IonCol, IonToast } from "@ionic/react";
import { useHistory } from "react-router-dom";
import {
  IonItem,
  IonLabel,
  IonInput,
  IonButton,
} from "@ionic/react";

import * as sessionRoutes from '../services/api/session';
import LocalStorage from '../LocalStorage';
import { Action } from "../components/Action";
import { UserContext } from "../App";

const Page: React.FC = () => {
  const [showToast, setShowToast] = useState(false);
  const [messageToast, setMessageToast ] = useState('');
  
  const history = useHistory();
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');

  const user = useContext(UserContext);

  function validateEmail(email: string) {
    const re =
      // eslint-disable-next-line no-control-regex
      /^((?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\]))$/;
    return re.test(String(email).toLowerCase());
  }

  const validateForm = () => {
    if (!email) {
      setMessageToast("Por favor, informe o e-mail");
      setShowToast(true);
      return false;
    }

    if (!validateEmail(email)) {
      setMessageToast("E-mail inválido");
      setShowToast(true);
      return false;
    }

    if (!password) {
      setMessageToast("Por favor, digite a sua senha");
      setShowToast(true);
      return false;
    }

    if(password.length < 7 || password.length > 12) {
      setMessageToast("A senha deve conter entre 7 e 12 dígitos");
      setShowToast(true);
      return false;
    }

    return true;
  }

  const handleLogin = async () => {
    if (!validateForm()) {
      return
    }

    const singinForm = {
      login: email,
      password: password,
    };

    await sessionRoutes.create(singinForm).then(response => {
      if (response.status === 'error') {
        setMessageToast(response.message);
        setShowToast(true);

        return
      }

      const { token } = response.token

      LocalStorage.setToken(token);

      user.setIsLoggedIn(true);

      history.push({ pathname: '/home', state: { redirectData: {
        showToastMessage: true,
        toastColor: "success",
        toastMessage: "Usuário autenticado com sucesso!",
      }}})
    }).catch(error => {
      // if (!error.response) return

      // se o backend retornou uma mensagem de erro customizada
      // if (error.response.data.message) {
      console.dir('Houve um erro: ', { error })
      alert('Houve um erro')
    })
  };

  return (
    <IonPage>
      <IonHeader>
        <IonToolbar>
          <IonTitle>Login</IonTitle>
        </IonToolbar>
      </IonHeader>

      <IonContent fullscreen>
        <IonHeader collapse="condense">
          <IonToolbar>
            <IonTitle size="large">Login</IonTitle>
          </IonToolbar>
        </IonHeader>

        <IonGrid>
          <IonRow>
            <IonCol>
              <IonItem>
                <IonLabel position="floating"> Email</IonLabel>
                <IonInput
                  type="email"
                  value={email}
                  onIonChange={(e) => setEmail(e.detail.value!)}
                ></IonInput>
              </IonItem>
            </IonCol>
          </IonRow>

          <IonRow>
            <IonCol>
              <IonItem>
                <IonLabel position="floating"> Senha</IonLabel>
                <IonInput
                  type="password"
                  value={password}
                  onIonChange={(e) => setPassword(e.detail.value!)}
                ></IonInput>
              </IonItem>
            </IonCol>
          </IonRow>

          <IonRow>
            <IonCol>
              <IonButton expand="block" onClick={handleLogin}>
                Login
              </IonButton>
              <p style={{ fontSize: "medium" }}>
                <Action message="Ainda não possui uma conta?" text="Cadastre-se aqui!" link="/cadastro" />
              </p>
            </IonCol>
          </IonRow>
        </IonGrid>

        <IonToast
          position="top"
          color='danger'      
          isOpen={showToast}
          onDidDismiss={() => setShowToast(false)}
          message={messageToast}
          duration={2500}
        />
      </IonContent>
    </IonPage>
  );
};

export default Page;