text: import { takeLatest, put, all, call } from 'redux-saga/effects';
  
  import UserActionTypes from './user.types';
  
  import { signInSuccess, signInFailure, signOutSuccess, signOutFailure, signUpSuccess, signUpFailure } from './user.actions';
  
  import { auth, googleProvider, createUserProfileDoc, getCurrentUser } from '../../firebase/firebase.utils'
  
  export function* getSnapshotFromUserAuth(user, additionalData){
      try {
          const userRef = yield call(createUserProfileDoc, user, additionalData);
          const userSnapshot = yield userRef.get();
          yield put(signInSuccess({ id: userSnapshot.id, ...userSnapshot.data() }))
      } catch(error){
          yield put(signInFailure(error))
      }
  }
  
  export function* onCheckUserSession(){
      yield takeLatest(UserActionTypes.CHECK_USER_SESSION, isUserAuthenticated);
  }
  
  export function* isUserAuthenticated(){
      try {
          const userAuth = yield getCurrentUser();
          if(!userAuth) return;
          yield getSnapshotFromUserAuth(userAuth);
      } catch(error){
          yield put(signInFailure(error))
      }
  }
  
  export function* onGoogleSignInStart(){
      yield takeLatest(UserActionTypes.GOOGLE_SIGN_IN_START, signInWithGoogle);
  }
  
  export function* signInWithGoogle(){
      const { user } = yield auth.signInWithPopup(googleProvider);
      yield getSnapshotFromUserAuth(user);
  }
  
  export function* onEmailSignInStart(){
      yield takeLatest(UserActionTypes.EMAIL_SIGN_IN_START, signInWithEmailAndPassword)
  }
  
  export function* signInWithEmailAndPassword({ payload: { email, password }}){
      const { user } = yield auth.signInWithEmailAndPassword(email, password);
      yield getSnapshotFromUserAuth(user);
  }
  
  export function* onSignOutStart(){
      yield takeLatest(UserActionTypes.SIGN_OUT_START, signOut);
  }
  
  export function* signOut(){
      try {
          yield auth.signOut();
          yield put(signOutSuccess())
      } catch(error){
          yield put(signOutFailure(error))
      }
  }
  
  export function* onSignUpStart(){
      yield takeLatest(UserActionTypes.SIGN_UP_START, signUp)
  }
  
  export function* signUp({payload: { email, password, displayName }}){
      try {
          const { user } = yield auth.createUserWithEmailAndPassword(email, password);
          yield put(signUpSuccess({user, additionalData: { displayName }}))
      } catch (error){
          yield put(signUpFailure(error))
      }
  }
  
  export function* signInAfterSignUp({ user, additionalData }){
      try {
          yield getSnapshotFromUserAuth(user, additionalData);
      } catch (error){
          yield put(signInFailure(error));
      }
  }
  
  export function* onSignUpSuccess(){
      yield takeLatest(UserActionTypes.SIGN_UP_SUCCESS, signInAfterSignUp)
  }
  
  export function* userSagas(){
      yield all([
          call(onGoogleSignInStart),
          call(onEmailSignInStart), 
          call(onCheckUserSession), 
          call(onSignOutStart),
          call(onSignUpStart),
          call(onSignUpSuccess)
      ]);
  }