Update FPX bank list with offline status

stripe/res/values/strings.xml

@@ -130,4 +130,8 @@
     <string name="sepa_debit_mandate" tools:ignore="MissingTranslation">By providing your IBAN and confirming this payment, you are authorizing EXAMPLE COMPANY NAME and Stripe, our payment service provider, to send instructions to your bank to debit your account and your bank to debit your account in accordance with those instructions. You are entitled to a refund from your bank under the terms and conditions of your agreement with your bank. A refund must be claimed within 8 weeks starting from the date on which your account was debited.</string>
     <string name="iban_hint" tools:ignore="MissingTranslation">IBAN</string>
     <string name="create_sepa_debit_button" tools:ignore="MissingTranslation">Create SEPA Debit Payment Method</string>
+
+    <!-- TODO(mshafrir-stripe): translate string - ANDROID-432 -->
+    <!-- Label that will show that an FPX bank is offline. For example, "AmBank - Offline" -->
+    <string name="fpx_bank_offline" tools:ignore="MissingTranslation">%s - Offline</string>
 </resources>

stripe/src/main/java/com/stripe/android/model/FpxBankStatuses.kt

@@ -5,9 +5,12 @@ import org.json.JSONObject
 internal class FpxBankStatuses private constructor(
     private val statuses: Map<String, Boolean>? = null
 ) {
+    /**
+     * Defaults to `true` if statuses aren't available.
+     */
     @JvmSynthetic
     internal fun isOnline(bankId: String): Boolean {
-        return statuses?.get(bankId) ?: false
+        return statuses?.get(bankId) ?: true
     }
 
     companion object {

stripe/src/main/java/com/stripe/android/view/AddPaymentMethodFpxView.kt

@@ -2,6 +2,8 @@ package com.stripe.android.view
 
 import android.content.Context
 import android.content.res.ColorStateList
+import android.content.res.Resources
+import android.os.AsyncTask
 import android.os.Parcel
 import android.os.Parcelable
 import android.view.LayoutInflater
@@ -12,8 +14,15 @@ import androidx.appcompat.widget.AppCompatImageView
 import androidx.core.widget.ImageViewCompat
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.stripe.android.ApiRequest
+import com.stripe.android.PaymentConfiguration
 import com.stripe.android.R
+import com.stripe.android.StripeApiRepository
+import com.stripe.android.StripeRepository
+import com.stripe.android.model.FpxBankStatuses
 import com.stripe.android.model.PaymentMethodCreateParams
+import java.lang.ref.WeakReference
 import kotlinx.android.synthetic.main.add_payment_method_fpx_layout.view.*
 
 internal class AddPaymentMethodFpxView private constructor(
@@ -44,6 +53,8 @@ internal class AddPaymentMethodFpxView private constructor(
             layoutManager = LinearLayoutManager(context)
             itemAnimator = DefaultItemAnimator()
         }
+
+        FpxBankStatusesTask(context.applicationContext, this).execute()
     }
 
     override fun onSaveInstanceState(): Parcelable? {
@@ -59,16 +70,23 @@ internal class AddPaymentMethodFpxView private constructor(
         }
     }
 
+    private fun onFpxBankStatusesUpdated(fpxBankStatuses: FpxBankStatuses?) {
+        fpxBankStatuses?.let {
+            fpxAdapter.updateStatuses(it)
+        }
+    }
+
     private class Adapter constructor(
         private val themeConfig: ThemeConfig
-    ) : androidx.recyclerview.widget.RecyclerView.Adapter<Adapter.ViewHolder>() {
+    ) : RecyclerView.Adapter<Adapter.ViewHolder>() {
         var selectedPosition = -1
+        private var fpxBankStatuses: FpxBankStatuses = FpxBankStatuses.EMPTY
 
         internal val selectedBank: FpxBank?
             get() = if (selectedPosition == -1) {
                 null
             } else {
-                FpxBank.values()[selectedPosition]
+                getItem(selectedPosition)
             }
 
         init {
@@ -83,7 +101,9 @@ internal class AddPaymentMethodFpxView private constructor(
 
         override fun onBindViewHolder(viewHolder: ViewHolder, i: Int) {
             viewHolder.setSelected(i == selectedPosition)
-            viewHolder.update(FpxBank.values()[i])
+
+            val fpxBank = getItem(i)
+            viewHolder.update(fpxBank, fpxBankStatuses.isOnline(fpxBank.id))
             viewHolder.itemView.setOnClickListener {
                 val currentPosition = viewHolder.adapterPosition
                 if (currentPosition != selectedPosition) {
@@ -103,22 +123,45 @@ internal class AddPaymentMethodFpxView private constructor(
             return FpxBank.values().size
         }
 
-        fun updateSelected(position: Int) {
+        private fun getItem(position: Int): FpxBank {
+            return FpxBank.values()[position]
+        }
+
+        internal fun updateSelected(position: Int) {
             selectedPosition = position
             notifyItemChanged(position)
         }
 
+        internal fun updateStatuses(fpxBankStatuses: FpxBankStatuses) {
+            this.fpxBankStatuses = fpxBankStatuses
+
+            FpxBank.values().indices
+                .filterNot { position ->
+                    fpxBankStatuses.isOnline(getItem(position).id)
+                }
+                .forEach { position ->
+                    notifyItemChanged(position)
+                }
+        }
+
         private class ViewHolder constructor(
             itemView: View,
             private val themeConfig: ThemeConfig
-        ) : androidx.recyclerview.widget.RecyclerView.ViewHolder(itemView) {
-
+        ) : RecyclerView.ViewHolder(itemView) {
+            private val resources: Resources = itemView.resources
             private val name: TextView = itemView.findViewById(R.id.name)
             private val icon: AppCompatImageView = itemView.findViewById(R.id.icon)
             private val checkMark: AppCompatImageView = itemView.findViewById(R.id.check_icon)
 
-            internal fun update(fpxBank: FpxBank) {
-                name.text = fpxBank.displayName
+            internal fun update(fpxBank: FpxBank, isOnline: Boolean) {
+                name.text = if (isOnline) {
+                    fpxBank.displayName
+                } else {
+                    resources.getString(
+                        R.string.fpx_bank_offline,
+                        fpxBank.displayName
+                    )
+                }
                 icon.setImageResource(fpxBank.brandIconResId)
             }
 
@@ -133,6 +176,30 @@ internal class AddPaymentMethodFpxView private constructor(
         }
     }
 
+    private class FpxBankStatusesTask internal constructor(
+        context: Context,
+        view: AddPaymentMethodFpxView
+    ) : AsyncTask<Void, Void, FpxBankStatuses?>() {
+        private val stripeRepository: StripeRepository = StripeApiRepository(context)
+        private val paymentConfiguration = PaymentConfiguration.getInstance(context)
+        private val viewRef: WeakReference<AddPaymentMethodFpxView> = WeakReference(view)
+
+        override fun doInBackground(vararg p0: Void?): FpxBankStatuses? {
+            return try {
+                stripeRepository.getFpxBankStatus(
+                    ApiRequest.Options.create(paymentConfiguration.publishableKey)
+                )
+            } catch (e: Exception) {
+                null
+            }
+        }
+
+        override fun onPostExecute(fpxBankStatuses: FpxBankStatuses?) {
+            super.onPostExecute(fpxBankStatuses)
+            viewRef.get()?.onFpxBankStatusesUpdated(fpxBankStatuses)
+        }
+    }
+
     private class SavedState : BaseSavedState {
         internal val selectedPosition: Int