Filter card brands in PAN field

stripe · Oct 17, 2024 · 7aee8fb · 7aee8fb
1 parent cd92fb6
commit 7aee8fb
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/payments-ui-core/src/main/java/com/stripe/android/ui/core/elements/CardDetailsController.kt b/payments-ui-core/src/main/java/com/stripe/android/ui/core/elements/CardDetailsController.kt
@@ -55,7 +55,7 @@ internal class CardDetailsController(
     val numberElement = CardNumberElement(
         IdentifierSpec.CardNumber,
         DefaultCardNumberController(
-            cardTextFieldConfig = CardNumberConfig(),
+            cardTextFieldConfig = CardNumberConfig(isCBCEligible = cbcEligibility != CardBrandChoiceEligibility.Ineligible, cardBrandFilter = cardBrandFilter),
             cardAccountRangeRepository = cardAccountRangeRepositoryFactory.create(),
             uiContext = uiContext,
             workContext = workContext,

diff --git a/payments-ui-core/src/main/java/com/stripe/android/ui/core/elements/CardNumberConfig.kt b/payments-ui-core/src/main/java/com/stripe/android/ui/core/elements/CardNumberConfig.kt
@@ -3,13 +3,17 @@ package com.stripe.android.ui.core.elements
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.VisualTransformation
+import com.stripe.android.CardBrandFilter
 import com.stripe.android.CardUtils
 import com.stripe.android.model.CardBrand
 import com.stripe.android.uicore.elements.TextFieldState
 import com.stripe.android.uicore.elements.TextFieldStateConstants
 import com.stripe.android.R as StripeR
 
-internal class CardNumberConfig : CardDetailsTextFieldConfig {
+internal class CardNumberConfig(
+    private val isCBCEligible: Boolean,
+    private val cardBrandFilter: CardBrandFilter
+)    : CardDetailsTextFieldConfig {
     override val capitalization: KeyboardCapitalization = KeyboardCapitalization.None
     override val debugLabel: String = "Card number"
     override val label: Int = StripeR.string.stripe_acc_label_card_number
@@ -22,6 +26,12 @@ internal class CardNumberConfig : CardDetailsTextFieldConfig {
 
         return if (number.isBlank()) {
             TextFieldStateConstants.Error.Blank
+        } else if (!cardBrandFilter.isAccepted(brand) && (!isCBCEligible || number.length > 8)) {
+            return TextFieldStateConstants.Error.Invalid(
+                errorMessageResId = StripeR.string.stripe_disallowed_card_brand,
+                formatArgs = arrayOf(brand.displayName),
+                preventMoreInput = false,
+            )
         } else if (brand == CardBrand.Unknown) {
             TextFieldStateConstants.Error.Invalid(
                 errorMessageResId = StripeR.string.stripe_invalid_card_number,