Add BillingDependencies and shared implementation.

app/src/main/java/org/thoughtcrime/securesms/dependencies/ApplicationDependencyProvider.java

@@ -452,7 +452,7 @@ public class ApplicationDependencyProvider implements AppDependencies.Provider {
 
   @Override
   public @NonNull BillingApi provideBillingApi() {
-    return BillingFactory.create(context, RemoteConfig.messageBackups());
+    return BillingFactory.create(GooglePlayBillingDependencies.INSTANCE, RemoteConfig.messageBackups());
   }
 
   @Override

app/src/main/java/org/thoughtcrime/securesms/dependencies/GooglePlayBillingDependencies.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.dependencies
+
+import android.content.Context
+import org.signal.core.util.billing.BillingDependencies
+
+/**
+ * Dependency object for Google Play Billing.
+ */
+object GooglePlayBillingDependencies : BillingDependencies {
+
+  override val context: Context get() = AppDependencies.application
+
+  override suspend fun getProductId(): String {
+    return "backup" // TODO [message-backups] This really shouldn't be hardcoded into the app.
+  }
+
+  override suspend fun getBasePlanId(): String {
+    return "monthly" // TODO [message-backups] This really shouldn't be hardcoded into the app.
+  }
+}

app/src/website/java/org/signal/billing/BillingFactory.kt

@@ -1,14 +1,14 @@
 package org.signal.billing
 
-import android.content.Context
 import org.signal.core.util.billing.BillingApi
+import org.signal.core.util.billing.BillingDependencies
 
 /**
  * Website builds do not support google play billing.
  */
 object BillingFactory {
   @JvmStatic
-  fun create(context: Context, isBackupsAvailable: Boolean): BillingApi {
+  fun create(billingDependencies: BillingDependencies, isBackupsAvailable: Boolean): BillingApi {
     return BillingApi.Empty
   }
 }

billing/src/main/java/org/signal/billing/BillingApiImpl.kt

@@ -6,7 +6,6 @@
 package org.signal.billing
 
 import android.app.Activity
-import android.content.Context
 import com.android.billingclient.api.BillingClient
 import com.android.billingclient.api.BillingClient.BillingResponseCode
 import com.android.billingclient.api.BillingClient.ProductType
@@ -37,6 +36,7 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.signal.core.util.billing.BillingApi
+import org.signal.core.util.billing.BillingDependencies
 import org.signal.core.util.logging.Log
 
 /**
@@ -46,7 +46,7 @@ import org.signal.core.util.logging.Log
  * Care should be taken here to ensure only one instance of this exists at a time.
  */
 internal class BillingApiImpl(
-  context: Context
+  private val billingDependencies: BillingDependencies
 ) : BillingApi {
 
   companion object {
@@ -74,7 +74,7 @@ internal class BillingApiImpl(
     }
   }
 
-  private val billingClient: BillingClient = BillingClient.newBuilder(context)
+  private val billingClient: BillingClient = BillingClient.newBuilder(billingDependencies.context)
     .setListener(purchasesUpdatedListener)
     .enablePendingPurchases(
       PendingPurchasesParams.newBuilder()
@@ -98,6 +98,7 @@ internal class BillingApiImpl(
 
   override suspend fun queryProducts() {
     val products = queryProductsInternal()
+    Log.d(TAG, "Retrieved products with result: $products")
   }
 
   override suspend fun queryPurchases() {
@@ -106,6 +107,7 @@ internal class BillingApiImpl(
       .build()
 
     val purchases = doOnConnectionReady {
+      Log.d(TAG, "Querying purchases.")
       billingClient.queryPurchasesAsync(param)
     }
 
@@ -143,6 +145,7 @@ internal class BillingApiImpl(
 
     doOnConnectionReady {
       withContext(Dispatchers.Main) {
+        Log.d(TAG, "Launching billing flow.")
         billingClient.launchBillingFlow(activity, billingFlowParams)
       }
     }
@@ -159,7 +162,7 @@ internal class BillingApiImpl(
   private suspend fun queryProductsInternal(): ProductDetailsResult {
     val productList = listOf(
       QueryProductDetailsParams.Product.newBuilder()
-        .setProductId("") // TODO [message-backups] where does the product id come from?
+        .setProductId(billingDependencies.getProductId())
         .setProductType(ProductType.SUBS)
         .build()
     )
@@ -170,6 +173,7 @@ internal class BillingApiImpl(
 
     return withContext(Dispatchers.IO) {
       doOnConnectionReady {
+        Log.d(TAG, "Querying product details.")
         billingClient.queryProductDetails(params)
       }
     }

billing/src/main/java/org/signal/billing/BillingFactory.kt

@@ -5,17 +5,17 @@
 
 package org.signal.billing
 
-import android.content.Context
 import org.signal.core.util.billing.BillingApi
+import org.signal.core.util.billing.BillingDependencies
 
 /**
  * Play billing factory. Returns empty implementation if message backups are not enabled.
  */
 object BillingFactory {
   @JvmStatic
-  fun create(context: Context, isBackupsAvailable: Boolean): BillingApi {
+  fun create(billingDependencies: BillingDependencies, isBackupsAvailable: Boolean): BillingApi {
     return if (isBackupsAvailable) {
-      BillingApiImpl(context)
+      BillingApiImpl(billingDependencies)
     } else {
       BillingApi.Empty
     }

core-util/src/main/java/org/signal/core/util/billing/BillingDependencies.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.util.billing
+
+import android.content.Context
+
+/**
+ * Provides a dependency model by which the billing api can request different resources.
+ */
+interface BillingDependencies {
+  /**
+   * Application context
+   */
+  val context: Context
+
+  /**
+   * Get the product id from the donations configuration object.
+   */
+  suspend fun getProductId(): String
+
+  /**
+   * Get the base plan id from the donations configuration object.
+   */
+  suspend fun getBasePlanId(): String
+}