add support for bottom nav bar

app/src/main/java/sh/sar/basedbank/ui/home/HomeActivity.kt

@@ -54,6 +54,7 @@ class HomeActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityHomeBinding
     private val viewModel: HomeViewModel by viewModels()
+    private lateinit var toggle: ActionBarDrawerToggle
 
     private val autolockHandler = Handler(Looper.getMainLooper())
     private var warningDialog: AlertDialog? = null
@@ -82,13 +83,25 @@ class HomeActivity : AppCompatActivity() {
         setContentView(binding.root)
         setSupportActionBar(binding.toolbar)
 
-        val toggle = ActionBarDrawerToggle(
+        toggle = ActionBarDrawerToggle(
             this, binding.drawerLayout, binding.toolbar,
             R.string.nav_open_drawer, R.string.nav_close_drawer
         )
         binding.drawerLayout.addDrawerListener(toggle)
         toggle.syncState()
 
+        binding.bottomNavigation.setOnItemSelectedListener { item ->
+            when (item.itemId) {
+                R.id.nav_dashboard -> { show(DashboardFragment()); true }
+                R.id.nav_accounts -> { show(AccountsFragment()); true }
+                R.id.nav_transfer -> { show(TransferFragment()); true }
+                R.id.nav_more -> { showMoreSheet(); false }
+                else -> false
+            }
+        }
+
+        applyNavMode()
+
         binding.navigationView.setNavigationItemSelectedListener { item ->
             binding.drawerLayout.closeDrawers()
             when (item.itemId) {
@@ -177,6 +190,36 @@ class HomeActivity : AppCompatActivity() {
             .commit()
     }
 
+    fun applyNavMode() {
+        val isBottom = getSharedPreferences("prefs", MODE_PRIVATE).getBoolean("bottom_nav", false)
+        if (isBottom) {
+            binding.drawerLayout.setDrawerLockMode(androidx.drawerlayout.widget.DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
+            toggle.isDrawerIndicatorEnabled = false
+            supportActionBar?.setDisplayHomeAsUpEnabled(false)
+            binding.bottomNavigation.visibility = View.VISIBLE
+        } else {
+            binding.drawerLayout.setDrawerLockMode(androidx.drawerlayout.widget.DrawerLayout.LOCK_MODE_UNLOCKED)
+            toggle.isDrawerIndicatorEnabled = true
+            toggle.syncState()
+            binding.bottomNavigation.visibility = View.GONE
+        }
+    }
+
+    private fun showMoreSheet() {
+        val sheet = NavMoreSheetFragment()
+        sheet.onNavigate = { itemId ->
+            when (itemId) {
+                R.id.nav_contacts -> show(ContactsFragment())
+                R.id.nav_transfer_history -> show(TransferHistoryFragment())
+                R.id.nav_finances -> show(FinancingFragment())
+                R.id.nav_otp -> show(OtpFragment())
+                R.id.nav_settings -> show(SettingsFragment())
+                else -> Toast.makeText(this, R.string.work_in_progress, Toast.LENGTH_SHORT).show()
+            }
+        }
+        sheet.show(supportFragmentManager, "nav_more")
+    }
+
     fun setRefreshing(visible: Boolean) {
         binding.refreshIndicator.visibility = if (visible) View.VISIBLE else View.GONE
     }

app/src/main/java/sh/sar/basedbank/ui/home/NavMoreSheetFragment.kt

@@ -0,0 +1,25 @@
+package sh.sar.basedbank.ui.home
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import com.google.android.material.navigation.NavigationView
+import sh.sar.basedbank.R
+
+class NavMoreSheetFragment : BottomSheetDialogFragment() {
+
+    var onNavigate: ((Int) -> Unit)? = null
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View =
+        inflater.inflate(R.layout.sheet_nav_more, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        view.findViewById<NavigationView>(R.id.navMoreView).setNavigationItemSelectedListener { item ->
+            dismiss()
+            onNavigate?.invoke(item.itemId)
+            true
+        }
+    }
+}

app/src/main/java/sh/sar/basedbank/ui/home/SettingsFragment.kt

@@ -44,6 +44,15 @@ class SettingsFragment : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         val prefs = requireContext().getSharedPreferences("prefs", Context.MODE_PRIVATE)
 
+        // Navigation mode
+        val isBottom = prefs.getBoolean("bottom_nav", false)
+        binding.navModeToggle.check(if (isBottom) R.id.btnNavBottom else R.id.btnNavDrawer)
+        binding.navModeToggle.addOnButtonCheckedListener { _, checkedId, isChecked ->
+            if (!isChecked) return@addOnButtonCheckedListener
+            prefs.edit().putBoolean("bottom_nav", checkedId == R.id.btnNavBottom).apply()
+            (activity as? HomeActivity)?.applyNavMode()
+        }
+
         // Theme
         val saved = prefs.getString("theme", "system")
         val initialId = when (saved) {