[android] Made purchase controller and validator savable to survive the screen rotation during validation process

android/src/com/mapswithme/maps/PurchaseOperationObservable.java

@@ -24,6 +24,8 @@ public class PurchaseOperationObservable implements Framework.PurchaseValidation
   private final Map<String, CoreValidationObserver> mValidationObservers = new HashMap<>();
   @NonNull
   private final List<CoreStartTransactionObserver> mTransactionObservers = new ArrayList<>();
+  @NonNull
+  private final Map<String, PendingResult> mValidationPendingResults = new HashMap<>();
   @SuppressWarnings("NullableProblems")
   @NonNull
   private Logger mLogger;
@@ -56,10 +58,15 @@ public class PurchaseOperationObservable implements Framework.PurchaseValidation
     String purchaseData = new String(tokenBytes);
     String orderId = PurchaseUtils.parseOrderId(purchaseData);
     CoreValidationObserver observer = mValidationObservers.get(orderId);
+    ValidationStatus status = ValidationStatus.values()[code];
     if (observer == null)
+    {
+      PendingResult result = new PendingResult(status, serverId, vendorId, purchaseData);
+      mValidationPendingResults.put(orderId, result);
       return;
+    }
 
-    observer.onValidatePurchase(ValidationStatus.values()[code], serverId, vendorId, purchaseData);
+    observer.onValidatePurchase(status, serverId, vendorId, purchaseData);
   }
 
   @Override
@@ -70,10 +77,19 @@ public class PurchaseOperationObservable implements Framework.PurchaseValidation
       observer.onStartTransaction(success, serverId, vendorId);
   }
 
-  public void addValidationObserver(@NonNull String orderId, @NonNull CoreValidationObserver observer)
+  public void addValidationObserver(@NonNull String orderId,
+                                    @NonNull CoreValidationObserver observer)
   {
     mLogger.d(TAG, "Add validation observer '" + observer + "' for '" + orderId + "'");
     mValidationObservers.put(orderId, observer);
+    PendingResult result = mValidationPendingResults.remove(orderId);
+    if (result != null)
+    {
+      mLogger.d(TAG, "Post pending validation result to '" + observer + "' for '"
+                     + orderId + "'");
+      observer.onValidatePurchase(result.getStatus(), result.getServerId(), result.getVendorId(),
+                                  result.getPurchaseData());
+    }
   }
 
   public void removeValidationObserver(@NonNull String orderId)
@@ -93,4 +109,49 @@ public class PurchaseOperationObservable implements Framework.PurchaseValidation
     mLogger.d(TAG, "Remove transaction observer '" + observer + "'");
     mTransactionObservers.remove(observer);
   }
+
+  private static class PendingResult
+  {
+    @NonNull
+    private final ValidationStatus mStatus;
+    @NonNull
+    private final String mServerId;
+    @NonNull
+    private final String mVendorId;
+    @NonNull
+    private final String mPurchaseData;
+
+    private PendingResult(@NonNull ValidationStatus status, @NonNull String serverId,
+                          @NonNull String vendorId, @NonNull String purchaseData)
+    {
+      mStatus = status;
+      mServerId = serverId;
+      mVendorId = vendorId;
+      mPurchaseData = purchaseData;
+    }
+
+    @NonNull
+    ValidationStatus getStatus()
+    {
+      return mStatus;
+    }
+
+    @NonNull
+    String getServerId()
+    {
+      return mServerId;
+    }
+
+    @NonNull
+    String getVendorId()
+    {
+      return mVendorId;
+    }
+
+    @NonNull
+    String getPurchaseData()
+    {
+      return mPurchaseData;
+    }
+  }
 }

android/src/com/mapswithme/maps/purchase/AbstractPurchaseController.java

@@ -1,6 +1,7 @@
 package com.mapswithme.maps.purchase;
 
 import android.app.Activity;
+import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
@@ -128,6 +129,18 @@ abstract class AbstractPurchaseController<V, B, UiCallback extends PurchaseCallb
 
   abstract void onDestroy();
 
+  @Override
+  public void onSave(@NonNull Bundle outState)
+  {
+    mValidator.onSave(outState);
+  }
+
+  @Override
+  public void onRestore(@NonNull Bundle inState)
+  {
+    mValidator.onRestore(inState);
+  }
+
   abstract class AbstractPlayStoreBillingCallback implements PlayStoreBillingCallback
   {
     @Override

android/src/com/mapswithme/maps/purchase/BookmarkPaymentFragment.java

@@ -83,6 +83,8 @@ public class BookmarkPaymentFragment extends BaseMwmFragment
     mPurchaseController = PurchaseFactory.createBookmarkPurchaseController(requireContext(),
                                                                            mPaymentData.getProductId(),
                                                                            mPaymentData.getServerId());
+    if (savedInstanceState != null)
+      mPurchaseController.onRestore(savedInstanceState);
     mPurchaseController.initialize(requireActivity());
     View root = inflater.inflate(R.layout.fragment_bookmark_payment, container, false);
     TextView buyButton = root.findViewById(R.id.buy_btn);
@@ -196,6 +198,7 @@ public class BookmarkPaymentFragment extends BaseMwmFragment
     LOGGER.d(TAG, "onSaveInstanceState");
     outState.putInt(EXTRA_CURRENT_STATE, mState.ordinal());
     outState.putParcelable(EXTRA_PRODUCT_DETAILS, mProductDetails);
+    mPurchaseController.onSave(outState);
   }
 
   @Override

android/src/com/mapswithme/maps/purchase/DefaultPurchaseValidator.java

@@ -1,7 +1,9 @@
 package com.mapswithme.maps.purchase;
 
+import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.Base64;
 
 import com.mapswithme.maps.Framework;
@@ -14,10 +16,13 @@ class DefaultPurchaseValidator implements PurchaseValidator<ValidationCallback>,
 {
   private static final Logger LOGGER = LoggerFactory.INSTANCE.getLogger(LoggerFactory.Type.BILLING);
   private static final String TAG = DefaultPurchaseValidator.class.getSimpleName();
+  private static final String EXTRA_VALIDATED_ORDER_ID = "extra_validated_order_id";
   @Nullable
   private ValidationCallback mCallback;
   @NonNull
   private final PurchaseOperationObservable mOperationObservable;
+  @Nullable
+  private String mValidatedOrderId;
 
   DefaultPurchaseValidator(@NonNull PurchaseOperationObservable validationObservable)
   {
@@ -28,7 +33,8 @@ class DefaultPurchaseValidator implements PurchaseValidator<ValidationCallback>,
   public void validate(@Nullable String serverId, @NonNull String vendor,
                        @NonNull String purchaseData)
   {
-    String orderId = PurchaseUtils.parseOrderId(purchaseData);
+    final String orderId = PurchaseUtils.parseOrderId(purchaseData);
+    mValidatedOrderId = orderId;
     mOperationObservable.addValidationObserver(orderId, this);
     String encodedPurchaseData = Base64.encodeToString(purchaseData.getBytes(), Base64.DEFAULT);
     Framework.nativeValidatePurchase(serverId == null ? "" : serverId, vendor, encodedPurchaseData);
@@ -38,12 +44,28 @@ class DefaultPurchaseValidator implements PurchaseValidator<ValidationCallback>,
   public void addCallback(@NonNull ValidationCallback callback)
   {
     mCallback = callback;
+    if (!TextUtils.isEmpty(mValidatedOrderId))
+      mOperationObservable.addValidationObserver(mValidatedOrderId, this);
   }
 
   @Override
   public void removeCallback()
   {
     mCallback = null;
+    if (!TextUtils.isEmpty(mValidatedOrderId))
+      mOperationObservable.removeValidationObserver(mValidatedOrderId);
+  }
+
+  @Override
+  public void onSave(@NonNull Bundle outState)
+  {
+    outState.putString(EXTRA_VALIDATED_ORDER_ID, mValidatedOrderId);
+  }
+
+  @Override
+  public void onRestore(@NonNull Bundle inState)
+  {
+    mValidatedOrderId = inState.getString(EXTRA_VALIDATED_ORDER_ID);
   }
 
   @Override
@@ -53,6 +75,7 @@ class DefaultPurchaseValidator implements PurchaseValidator<ValidationCallback>,
     LOGGER.i(TAG, "Validation code: " + status);
     String orderId = PurchaseUtils.parseOrderId(purchaseData);
     mOperationObservable.removeValidationObserver(orderId);
+    mValidatedOrderId = null;
     if (mCallback != null)
       mCallback.onValidate(purchaseData, status);
   }

android/src/com/mapswithme/maps/purchase/FailedBookmarkPurchaseController.java

@@ -1,6 +1,7 @@
 package com.mapswithme.maps.purchase;
 
 import android.app.Activity;
+import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
@@ -87,6 +88,18 @@ public class FailedBookmarkPurchaseController implements PurchaseController<Fail
     mCallback = null;
   }
 
+  @Override
+  public void onSave(@NonNull Bundle outState)
+  {
+    mValidator.onSave(outState);
+  }
+
+  @Override
+  public void onRestore(@NonNull Bundle inState)
+  {
+    mValidator.onRestore(inState);
+  }
+
   private class ValidationCallbackImpl implements ValidationCallback
   {
 

android/src/com/mapswithme/maps/purchase/PurchaseController.java

@@ -1,14 +1,17 @@
 package com.mapswithme.maps.purchase;
 
 import android.app.Activity;
+import android.os.Bundle;
 import android.support.annotation.NonNull;
 
+import com.mapswithme.maps.base.Savable;
+
 /**
  * Provides necessary purchase functionality to the UI. Controls whole platform-specific billing
  * process. This controller has to be used only within {@link #initialize(Activity)} and {@link #destroy()}
  * interval.
  */
-public interface PurchaseController<T>
+public interface PurchaseController<T> extends Savable<Bundle>
 {
   /**
    * Initializes the controller.

android/src/com/mapswithme/maps/purchase/PurchaseValidator.java

@@ -1,8 +1,11 @@
 package com.mapswithme.maps.purchase;
 
+import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
+import com.mapswithme.maps.base.Savable;
+
 /**
  * Represents a purchase validator. The main of purpose is to validate existing purchase and inform
  * the client code through typed callback {@link T}.<br><br>
@@ -10,7 +13,7 @@ import android.support.annotation.Nullable;
  * <b>one-to-one</b>. If you need to validate different purchases you have to create different
  * implementations of this interface.
  */
-interface PurchaseValidator<T>
+interface PurchaseValidator<T> extends Savable<Bundle>
 {
   /**
    * Validates the purchase with specified purchase data.