This documentation explains the useFirebaseAuthErrors hook, which maps Firebase Authentication error codes to user-friendly error messages.

The useFirebaseAuthErrors hook:

1. Provides a function (getErrorMessage) to convert Firebase Authentication error codes into user-readable messages.
2. Simplifies error handling by centralizing the mapping of error codes.

• Maps Firebase error codes to descriptive, user-friendly messages for better UX.

1. Error Code Handling:

   • Uses a switch statement to map predefined Firebase error codes to specific error messages.
   • Provides a default message for unknown error codes.

2. Code Snippet:

   const getErrorMessage = (errorCode: string): string => {
     switch (errorCode) {
       case 'auth/email-already-exists':
         return 'The email is already in use.';
       case 'auth/invalid-email':
         return 'Please enter a valid email address.';
       case 'auth/wrong-password':
         return 'Incorrect password.';
       case 'auth/too-many-requests':
         return 'Too many login attempts. Please try again later.';
       case 'auth/user-not-found':
         return 'No user found with this email.';
       // Additional cases...
       default:
         return 'An unknown error occurred.';
     }
   };

3. Process:

   • Accepts an errorCode as input.
   • Returns the corresponding user-friendly message.
   • Defaults to a generic message if the error code is not explicitly mapped.

• Ensures the hook can be reused across various components that handle Firebase Authentication errors.

1. Function Export:

   • Returns the getErrorMessage function to be used wherever needed.

2. Code Snippet:

   return { getErrorMessage };

3. Usage Example:

   import useFirebaseAuthErrors from './hooks/useFirebaseAuthErrors';
   
   const { getErrorMessage } = useFirebaseAuthErrors();
   
   try {
     // Some Firebase Authentication operation
   } catch (error: any) {
     const message = getErrorMessage(error.code);
     console.error(message);
     alert(message);
   }

import React, { useState } from 'react';
import { Alert, Button, TextInput, View } from 'react-native';
import { signInWithEmailAndPassword } from 'firebase/auth';
import { auth } from '../firebase';
import useFirebaseAuthErrors from './hooks/useFirebaseAuthErrors';

const LoginScreen = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const { getErrorMessage } = useFirebaseAuthErrors();

  const handleLogin = async () => {
    try {
      await signInWithEmailAndPassword(auth, email, password);
      Alert.alert('Success', 'You are now logged in!');
    } catch (error: any) {
      const errorMessage = getErrorMessage(error.code);
      Alert.alert('Login Error', errorMessage);
    }
  };

  return (
    <View>
      <TextInput
        placeholder="Email"
        value={email}
        onChangeText={setEmail}
      />
      <TextInput
        placeholder="Password"
        secureTextEntry
        value={password}
        onChangeText={setPassword}
      />
      <Button title="Login" onPress={handleLogin} />
    </View>
  );
};

export default LoginScreen;

• Unmapped Errors:

  • If the error code is not explicitly mapped, the function returns a generic message: "An unknown error occurred."

• Extensibility:

  • New error codes can easily be added to the switch statement for expanded support.

• Centralizes error handling for Firebase Authentication.
• Improves maintainability by abstracting error message mapping.

• You can expand the switch statement to include additional error codes as needed.

For more details, refer to the Firebase Authentication Error Codes Documentation.