From 3f63c0a81ad04d9261579099f4f7c73ee9a5a049 Mon Sep 17 00:00:00 2001
From: sounddrill31 <sounddrill31@gmail.com>
Date: Sat, 17 Aug 2024 03:27:28 +0530
Subject: [PATCH] Give Reason during Login Screen

- Also fix Compatibility with Kitkat
- Give multiple Reasons
---
 .../com/zeusinstitute/upiapp/FirstFragment.kt | 27 +++++++++++--------
 .../java/com/zeusinstitute/upiapp/Login.kt    | 26 ++++++++++++++----
 2 files changed, 37 insertions(+), 16 deletions(-)

diff --git a/app/src/main/java/com/zeusinstitute/upiapp/FirstFragment.kt b/app/src/main/java/com/zeusinstitute/upiapp/FirstFragment.kt
index 01f452b..c972732 100644
--- a/app/src/main/java/com/zeusinstitute/upiapp/FirstFragment.kt
+++ b/app/src/main/java/com/zeusinstitute/upiapp/FirstFragment.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.SharedPreferences
 import android.graphics.Bitmap
 import android.graphics.Color
+import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -33,12 +34,14 @@ class FirstFragment : Fragment(), SharedPreferences.OnSharedPreferenceChangeList
         savedInstanceState: Bundle?
     ): View? {
         _binding = FragmentFirstBinding.inflate(inflater, container, false)
-        qrCodeImageView = binding.qrCodeImageView // Initialize qrCodeImageView
+        qrCodeImageView = binding.qrCodeImageView
 
-        // Make status bar transparent
-        val window = requireActivity().window
-        window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-        window.statusBarColor = Color.TRANSPARENT
+        // Make status bar transparent (conditionally for Lollipop and above)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            val window = requireActivity().window
+            window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+            window.statusBarColor = Color.TRANSPARENT
+        }
 
         return binding.root
     }
@@ -81,12 +84,14 @@ class FirstFragment : Fragment(), SharedPreferences.OnSharedPreferenceChangeList
     override fun onDestroyView() {
         super.onDestroyView()
         sharedPref.unregisterOnSharedPreferenceChangeListener(this) // Unregister listener
-        val windowInsetsController =
-            ViewCompat.getWindowInsetsController(requireActivity().window.decorView)
-        windowInsetsController?.show(WindowInsetsCompat.Type.systemBars())
-        val window = requireActivity().window
-        window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-        window.statusBarColor = Color.TRANSPARENT // or any other color you want
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            val windowInsetsController =
+                ViewCompat.getWindowInsetsController(requireActivity().window.decorView)
+            windowInsetsController?.show(WindowInsetsCompat.Type.systemBars())
+            val window = requireActivity().window
+            window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+            window.statusBarColor = Color.TRANSPARENT // or any other color you want
+        }
         _binding = null
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/zeusinstitute/upiapp/Login.kt b/app/src/main/java/com/zeusinstitute/upiapp/Login.kt
index 48fa42f..0479382 100644
--- a/app/src/main/java/com/zeusinstitute/upiapp/Login.kt
+++ b/app/src/main/java/com/zeusinstitute/upiapp/Login.kt
@@ -9,12 +9,12 @@ import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import android.widget.Button
-import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
 import com.google.android.material.textfield.TextInputEditText
+import com.google.android.material.textfield.TextInputLayout
 
 class Login : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -30,6 +30,7 @@ class Login : Fragment() {
     ): View? {
         val view = inflater.inflate(R.layout.fragment_login, container, false)
 
+        val apikeyLayout = view.findViewById<TextInputLayout>(R.id.apikeyLayout)
         val apikey = view.findViewById<TextInputEditText>(R.id.apikey)
         val submitButton = view.findViewById<Button>(R.id.submitButton)
 
@@ -42,7 +43,7 @@ class Login : Fragment() {
         // Set up the listener for the "Enter" key on the keyboard
         apikey.setOnEditorActionListener { _, actionId, _ ->
             if (actionId == EditorInfo.IME_ACTION_DONE) {
-                submitButton.performClick() // Trigger the submit button's click listener
+                submitButton.performClick()
                 true
             } else {
                 false
@@ -52,7 +53,8 @@ class Login : Fragment() {
         submitButton.setOnClickListener {
             val data = apikey.text.toString()
 
-            if (isValidUpiId(data)) {
+            val invalidReasons = getInvalidUpiIdReasons(data) // Get multiple reasons
+            if (invalidReasons.isEmpty()) {
                 // Save data to Shared Preferences
                 val sharedPref = requireActivity().getPreferences(Context.MODE_PRIVATE) ?: return@setOnClickListener
                 with (sharedPref.edit()) {
@@ -63,8 +65,8 @@ class Login : Fragment() {
                 // Navigate back to FirstFragment
                 findNavController().navigate(R.id.action_login_to_firstFragment)
             } else {
-                // Show error message if UPI ID is invalid
-                Toast.makeText(context, "Invalid UPI ID. Please check and try again.", Toast.LENGTH_SHORT).show()
+                // Show error message directly in the TextInputLayout with all reasons
+                apikeyLayout.error = "Invalid UPI ID:\n${invalidReasons.joinToString("\n")}"
             }
         }
         return view
@@ -75,4 +77,18 @@ class Login : Fragment() {
         val upiIdRegex = Regex("^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+$")
         return upiId.contains("@") && !upiId.contains(" ") && upiIdRegex.matches(upiId)
     }
+
+    private fun getInvalidUpiIdReasons(upiId: String): List<String> {
+        val reasons = mutableListOf<String>()
+        if (!upiId.contains("@")) {
+            reasons.add("Must contain '@'") // Rule 2
+        }
+        if (upiId.contains(" ")) {
+            reasons.add("Should not contain whitespace") // Rule 3
+        }
+        if (!Regex("^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+$").matches(upiId)) {
+            reasons.add("Invalid characters used") // Rule 1 (and implicitly covers Rule 4)
+        }
+        return reasons
+    }
 }
\ No newline at end of file