Omnisub 5499 - Upgrade/downgrade subscription

README.md

@@ -161,6 +161,29 @@ CBPurchase.purchaseProduct(purchaseProductParams = purchaseProductParams, custom
  ```
 The above function will handle the purchase against Google Play Store and send the IAP token for server-side token verification to your Chargebee account. Use the Subscription ID returned by the above function, to check for Subscription status on Chargebee and confirm the access - granted or denied.
 
+### Upgrade or Downgrade Product
+Pass the `ChangeProductParams` and `CBCustomer` to the following function when the user chooses the product to purchase.
+
+`CBCustomer` - **Optional object**. Although this is an optional object, we recommend passing the necessary customer details, such as `customerId`, `firstName`, `lastName`, and `email`. This ensures that the customer details in your database match the customer details in Chargebee. If the `customerId` is not passed in the customer's details, then the value of `customerId` will be the same as the `SubscriptionId` created in Chargebee.
+
+**Note**: The `customer` parameter in the below code snippet is an instance of `CBCustomer` class that contains the details of the customer who wants to subscribe or buy the product.
+
+```kotlin
+val changeProductParams = ChangeProductParams(newProductParams, "currentProductId")
+val cbCustomer = CBCustomer("customerId","firstName","lastName","email")
+CBPurchase.changeProduct(changeProductParams = changeProductParams, customer = cbCustomer, object : CBCallback.PurchaseCallback<String>{
+      override fun onSuccess(result: ReceiptDetail, status:Boolean) {
+        Log.i(TAG, "$status")
+        Log.i(TAG, "${result.subscription_id}")
+        Log.i(TAG, "${result.plan_id}")   
+      }
+      override fun onError(error: CBException) {
+        Log.e(TAG, "Error:  ${error.message}")
+      }
+})
+ ```
+The above function is designed to manage subscription upgrades or downgrades between base plans within a single subscription or across multiple subscriptions.
+
 ### Invoke Manage Subscriptions in your App
 The `showManageSubscriptionsSettings()` function is designed to invoke the Manage Subscriptions in your app using Chargebee's Android SDKs. `Chargebee.showManageSubscriptionsSettings()`, opens the Play Store App subscriptions settings page.
 

app/src/main/java/com/chargebee/example/MainActivity.kt

@@ -30,6 +30,7 @@ import com.chargebee.example.plan.PlansActivity
 import com.chargebee.example.subscription.SubscriptionActivity
 import com.chargebee.example.token.TokenizeActivity
 import com.chargebee.example.util.CBMenu
+import com.chargebee.example.util.Constants.OLD_PRODUCT_ID
 import com.chargebee.example.util.Constants.PRODUCTS_LIST_KEY
 import com.google.gson.Gson
 import kotlinx.coroutines.CoroutineScope
@@ -133,6 +134,9 @@ class MainActivity : BaseActivity(), ListItemsAdapter.ItemClickListener {
             CBMenu.GetProducts.value -> {
                 getProductIdFromCustomer()
             }
+            CBMenu.ChangeProducts.value -> {
+                getCurrentAndNewProductIdFromCustomer()
+            }
             CBMenu.SubsStatus.value,
             CBMenu.SubsList.value -> {
                 val intent = Intent(this, SubscriptionActivity::class.java)
@@ -152,9 +156,10 @@ class MainActivity : BaseActivity(), ListItemsAdapter.ItemClickListener {
         }
     }
 
-    private fun launchProductDetailsScreen(productDetails: String) {
+    private fun launchProductDetailsScreen(productDetails: String, currentProductId: String? = null) {
         val intent = Intent(this, BillingActivity::class.java)
         intent.putExtra(PRODUCTS_LIST_KEY, productDetails)
+        intent.putExtra(OLD_PRODUCT_ID, currentProductId)
         this.startActivity(intent)
     }
 
@@ -206,15 +211,33 @@ class MainActivity : BaseActivity(), ListItemsAdapter.ItemClickListener {
         dialog.show()
     }
 
-    private fun getProductIdList(productIdList: ArrayList<String>) {
+    private fun getCurrentAndNewProductIdFromCustomer() {
+        val dialog = Dialog(this)
+        dialog.setContentView(R.layout.dialog_input_update_layout)
+        val productIds = dialog.findViewById<View>(R.id.productIdInput) as EditText
+        productIds.hint = "Please enter Product IDs(Comma separated)"
+        val currentProductId = dialog.findViewById<View>(R.id.currentProductIdInput) as EditText
+        currentProductId.hint = "Please enter Current Product ID"
+        val dialogButton = dialog.findViewById<View>(R.id.btn_ok) as Button
+        dialogButton.text = "Submit"
+        dialogButton.setOnClickListener {
+            val productIdList = productIds.text.toString().trim().split(",")
+            val currentProductId = currentProductId.text.toString().trim()
+            getProductIdList(productIdList.toCollection(ArrayList()), currentProductId)
+            dialog.dismiss()
+        }
+        dialog.show()
+    }
+
+    private fun getProductIdList(productIdList: ArrayList<String>, currentProductId: String? = null) {
         CBPurchase.retrieveProducts(
             this,
             productIdList,
             object : CBCallback.ListProductsCallback<ArrayList<CBProduct>> {
                 override fun onSuccess(productIDs: ArrayList<CBProduct>) {
                     CoroutineScope(Dispatchers.Main).launch {
                         if (productIDs.size > 0) {
-                            launchProductDetailsScreen(gson.toJson(productIDs))
+                            launchProductDetailsScreen(gson.toJson(productIDs), currentProductId)
                         } else {
                             alertSuccess("Items not available to buy")
                         }

app/src/main/java/com/chargebee/example/billing/BillingActivity.java

@@ -1,5 +1,6 @@
 package com.chargebee.example.billing;
 
+import static com.chargebee.example.util.Constants.OLD_PRODUCT_ID;
 import static com.chargebee.example.util.Constants.PRODUCTS_LIST_KEY;
 
 import android.app.Dialog;
@@ -17,6 +18,7 @@
 import com.chargebee.android.billingservice.OneTimeProductType;
 import com.chargebee.android.billingservice.ProductType;
 import com.chargebee.android.models.CBProduct;
+import com.chargebee.android.models.ChangeProductParams;
 import com.chargebee.android.models.PurchaseProductParams;
 import com.chargebee.android.network.CBCustomer;
 import com.chargebee.example.BaseActivity;
@@ -35,6 +37,7 @@
 public class BillingActivity extends BaseActivity implements ProductListAdapter.ProductClickListener, ProgressBarListener {
 
     private List<PurchaseProduct> purchaseProducts = null;
+    private String currentProductId = null;
     private ProductListAdapter productListAdapter = null;
     private LinearLayoutManager linearLayoutManager;
     private RecyclerView mItemsRecyclerView = null;
@@ -53,6 +56,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
         mItemsRecyclerView = findViewById(R.id.rv_product_list);
         String productDetails = getIntent().getStringExtra(PRODUCTS_LIST_KEY);
+        this.currentProductId = getIntent().getStringExtra(OLD_PRODUCT_ID);
 
         if(productDetails != null) {
             Gson gson = new Gson();
@@ -163,7 +167,11 @@ private void getCustomerID() {
                     dialog.dismiss();
                 }
             } else {
-                purchaseProduct();
+                if (this.currentProductId != null){
+                    changeProduct();
+                }else {
+                    purchaseProduct();
+                }
                 dialog.dismiss();
             }
         });
@@ -189,6 +197,14 @@ private void purchaseProduct() {
         this.billingViewModel.purchaseProduct(this, purchaseParams, cbCustomer);
     }
 
+    private void changeProduct() {
+        showProgressDialog();
+        PurchaseProduct selectedPurchaseProduct = purchaseProducts.get(position);
+        PurchaseProductParams newProductParams = new PurchaseProductParams(selectedPurchaseProduct.getCbProduct(), selectedPurchaseProduct.getOfferToken());
+        ChangeProductParams changeProductParams = new ChangeProductParams(newProductParams, currentProductId);
+        this.billingViewModel.changeProduct(this, changeProductParams, cbCustomer);
+    }
+
     private void purchaseNonSubscriptionProduct(OneTimeProductType productType) {
         showProgressDialog();
         CBProduct selectedProduct = purchaseProducts.get(position).getCbProduct();

app/src/main/java/com/chargebee/example/billing/BillingViewModel.kt

@@ -53,6 +53,31 @@ class BillingViewModel : ViewModel() {
         })
     }
 
+    fun changeProduct(context: Context, changeProductParams: ChangeProductParams, customer: CBCustomer) {
+        // Cache the product id in sharedPreferences and retry validating the receipt if in case server is not responding or no internet connection.
+        sharedPreference =  context.getSharedPreferences("PREFERENCE_NAME",Context.MODE_PRIVATE)
+        CBPurchase.changeProduct(changeProductParams = changeProductParams, customer = customer,  object : CBCallback.PurchaseCallback<String>{
+            override fun onSuccess(result: ReceiptDetail, status:Boolean) {
+                Log.i(TAG, "Subscription ID:  ${result.subscription_id}")
+                Log.i(TAG, "Plan ID:  ${result.plan_id}")
+                productPurchaseResult.postValue(status)
+            }
+            override fun onError(error: CBException) {
+                try {
+                    // Handled server not responding and offline
+                    if (error.httpStatusCode!! in 500..599) {
+                        storeInLocal(changeProductParams.newProductParams.product.id)
+                        validateReceipt(context = context, product = changeProductParams.newProductParams.product)
+                    } else {
+                        cbException.postValue(error)
+                    }
+                } catch (exp: Exception) {
+                    Log.i(TAG, "Exception :${exp.message}")
+                }
+            }
+        })
+    }
+
     private fun validateReceipt(context: Context, product: CBProduct) {
         val customer = CBCustomer(
             id = "sync_receipt_android",

app/src/main/java/com/chargebee/example/util/CBMenu.kt

@@ -10,6 +10,7 @@ enum class CBMenu(val value: String) {
     Tokenize("Tokenize"),
     ProductIDs("Get Google Play Product Identifiers"),
     GetProducts("Get Products"),
+    ChangeProducts("Change Product"),
     SubsStatus("Get Subscription Status"),
     SubsList("Get Subscriptions List"),
     GetEntitlements("Get Entitlements"),

app/src/main/java/com/chargebee/example/util/Constants.kt

@@ -2,4 +2,5 @@ package com.chargebee.example.util
 
 object Constants {
     const val PRODUCTS_LIST_KEY = "products"
+    const val OLD_PRODUCT_ID = "currentProductId"
 }

app/src/main/res/layout/dialog_input_update_layout.xml

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="300dp"
+    android:layout_height="300dp"
+    tools:context=".MainActivity">
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/planIdInputLayout"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="96dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView">
+
+        <EditText
+            android:id="@+id/productIdInput"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:ems="13"
+            android:inputType="textPersonName" />
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/currentPlanIdInputLayout"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.497"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView">
+
+        <EditText
+            android:id="@+id/currentProductIdInput"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:ems="13"
+            android:inputType="textPersonName" />
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        android:text="Chargebee"
+        android:textSize="24sp"
+        android:textStyle="bold"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/btn_ok"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="34dp"
+        android:text="Submit"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/planIdInputLayout" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>