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HarmonyOS5-Anonymous-Login-Guide-EN

Hi dear developer friends!πŸ‘‹ Today let's talk about how to add a "Guest Mode" login feature to your app, allowing users to enjoy your app without registration. This guide will walk you through the entire process step-by-step, and there are a few tips to avoid common pitfalls at the end~

🌟 Why is Anonymous Login Needed?

Imagine a new user opening your app for the first time; a tedious registration process might deter many. Anonymous login is like giving the user a "temporary pass," which can retain basic user data while significantly lowering the barrier to entry, effectively improving user retention rates~

πŸ› οΈ Integration Guide (Done in 5 Steps)

Step 1: Environment Setup 

// First, make sure the AGC SDK is integrated (version β‰₯1.6.0)
import agconnect from '@hw-agconnect/api'
import '@hw-agconnect/auth'
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Step 2: Initialize Authentication Module 

const auth = agconnect.auth().getInstance()
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Step 3: Smart Login Detection 

// Automatically detect login status on startup
auth.getCurrentUser().then(user => {
  if (user) {
    if (user.isAnonymous) {
      console.log('Guest account found, logging in automatically~')
      // Redirect to the main interface
    } else {
      console.log('A registered account is already logged in')
    }
  } else {
    console.log('Not logged in, displaying login selection page')
    // Show login options popup
  }
})
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Step 4: One-Click Guest Login 

// Bind button click event
document.getElementById('anonymousLogin').onclick = () => {
  auth.signInAnonymously()
    .then(userCredential => {
      console.log('Guest login successful! User ID:', userCredential.user.uid)
      // Redirect to the new user tutorial page
    })
    .catch(error => {
      console.error('Login failed:', error.code, error.message)
      // Display a friendly error message
    })
}
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Step 5: Account Upgrade Strategy 

// When a guest wants to upgrade to a full account (Example in Kotlin)
fun upgradeAccount(email: String, password: String) {
    val credential = EmailAuthProvider.credential(email, password)
    currentUser.link(credential)
        .addOnSuccessListener { 
            Toast.makeText(this, "Account upgrade successful!", Toast.LENGTH_SHORT).show()
        }
        .addOnFailureListener { e ->
            Log.w(TAG, "Linking failed:", e)
        }
}
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⚠️ Important Security Rules

  1. Protection for Sensitive Operations Operations like changing password/deleting account require a login record within the last 5 minutes. Re-authentication is needed if timed out: 
// Check before performing sensitive operations
if (Date.now() - user.lastLoginTime > 300000) {
  showReAuthDialog() // Show re-authentication dialog
}
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  1. Data Synchronization Strategy It is recommended to store guest data temporarily in local storage and synchronize it to the cloud after the account is upgraded.

🎯 Advanced Techniques

  • Event Listening: Capture login/logout events with Cloud Functions 
exports.onAuthEvent = functions.auth.user().onCreate((user) => {
  console.log(`User ${user.uid} just registered, send them a newbie gift pack~`)
});
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  • Exception Handling: Provide friendly tips for common error codes 
switch(error.code) {
  case 'auth/too-many-requests':
    alert('Too many requests, take a break and have some tea~')
    break;
  case 'auth/invalid-email': 
    alert('The email format seems incorrect.')
    break;
}
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Hope this guide helps everyone avoid detours! If you encounter any issues, feel free to chat with me in the comments section~ Also, remember to follow our official account for the latest tech news!✨

Wishing all developers a smooth journey, see you next time! πŸš€

【This issue's interactive question】Do you prefer logging in with a phone verification code or a quick guest experience? Share your thoughts in the comments section~ πŸ’¬

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