add warning for USD to MVR trnasfers

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

@@ -14,6 +14,9 @@ import android.view.ViewGroup
 import android.widget.BaseAdapter
 import android.widget.Filter
 import android.widget.Filterable
+import android.graphics.Typeface
+import android.widget.LinearLayout
+import android.widget.TextView
 import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
 import androidx.core.widget.addTextChangedListener
@@ -391,9 +394,18 @@ class TransferFragment : Fragment() {
         val destDisplay = binding.tvToAccountName.text?.toString() ?: resolvedAccountNumber
         val bankNameCapture = resolvedBankName
         val capturedToAvatar = (binding.ivToPhoto.drawable as? android.graphics.drawable.BitmapDrawable)?.bitmap
-        AlertDialog.Builder(requireContext())
+
+        val destCurrency = allAccounts.firstOrNull { it.accountNumber == resolvedAccountNumber }
+            ?.currencyName?.ifBlank { "MVR" }
+            ?: allContacts.firstOrNull { it.benefAccount == resolvedAccountNumber }
+                ?.transferCyDesc?.ifBlank { "MVR" }
+            ?: if (isDestMib) "MVR" else "MVR"
+        val isUsdToMvr = currency.equals("USD", ignoreCase = true) && destCurrency.equals("MVR", ignoreCase = true)
+
+        val mainMsg = "Send $currency $amountStr to $destDisplay?\n\nFrom: ${src.accountBriefName} · ${src.accountNumber}"
+
+        val dialogBuilder = AlertDialog.Builder(requireContext())
             .setTitle(R.string.transfer)
-            .setMessage("Send $currency $amountStr to $destDisplay?\n\nFrom: ${src.accountBriefName} · ${src.accountNumber}")
             .setPositiveButton(R.string.transfer_confirm) { _, _ ->
                 binding.btnTransfer.isEnabled = false
                 viewLifecycleOwner.lifecycleScope.launch {
@@ -416,7 +428,27 @@ class TransferFragment : Fragment() {
                 }
             }
             .setNegativeButton(android.R.string.cancel, null)
-            .show()
+
+        if (isUsdToMvr) {
+            val ctx = requireContext()
+            val dp = resources.displayMetrics.density
+            val container = LinearLayout(ctx).apply {
+                orientation = LinearLayout.VERTICAL
+                setPadding((24 * dp).toInt(), (16 * dp).toInt(), (24 * dp).toInt(), 0)
+            }
+            container.addView(TextView(ctx).apply { text = mainMsg })
+            container.addView(TextView(ctx).apply {
+                text = "⚠ You are transferring from a USD account to an MVR account. The currency will be converted at the bank's rate and this cannot be reversed!"
+                setTextColor(Color.RED)
+                textSize = 16f
+                typeface = Typeface.DEFAULT_BOLD
+                setPadding(0, (16 * dp).toInt(), 0, 0)
+            })
+            dialogBuilder.setView(container)
+        } else {
+            dialogBuilder.setMessage(mainMsg)
+        }
+        dialogBuilder.show()
     }
 
     private fun doMibTransfer(