demo: initialize remote node list with default values

demo/android/src/main/kotlin/im/molly/monero/demo/AppModule.kt

@@ -2,7 +2,11 @@ package im.molly.monero.demo
 
 import android.app.Application
 import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.sqlite.db.SupportSQLiteDatabase
 import im.molly.monero.demo.data.*
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 /**
  * Naive container of global instances.
@@ -11,13 +15,20 @@ import im.molly.monero.demo.data.*
  */
 object AppModule {
     private lateinit var application: Application
+    private lateinit var populateInitialData: suspend (AppDatabase) -> Unit
 
     private val applicationScope = kotlinx.coroutines.MainScope()
 
     private val database: AppDatabase by lazy {
         Room.databaseBuilder(
             application, AppDatabase::class.java, "monero-demo.db"
-        ).build()
+        ).addCallback(object : RoomDatabase.Callback() {
+            override fun onCreate(db: SupportSQLiteDatabase) {
+                applicationScope.launch(Dispatchers.IO) {
+                    populateInitialData(database)
+                }
+            }
+        }).build()
     }
 
     private val walletDataSource: WalletDataSource by lazy {
@@ -40,7 +51,8 @@ object AppModule {
         WalletRepository(moneroSdkClient, walletDataSource, settingsRepository, applicationScope)
     }
 
-    fun provide(application: Application) {
+    fun provide(application: Application, populateInitialData: suspend (AppDatabase) -> Unit) {
         this.application = application
+        this.populateInitialData = populateInitialData
     }
 }

demo/android/src/main/kotlin/im/molly/monero/demo/DefaultNodeList.kt

@@ -0,0 +1,28 @@
+package im.molly.monero.demo
+
+import android.net.Uri
+import im.molly.monero.MoneroNetwork
+import im.molly.monero.demo.data.AppDatabase
+import im.molly.monero.demo.data.entity.asEntity
+import im.molly.monero.demo.data.model.RemoteNode
+
+val DefaultNodeList = listOf(
+    MoneroNetwork.Mainnet to listOf(
+        "http://node.monerodevs.org:18089",
+        "http://node.sethforprivacy.com:18089",
+        "http://xmr-node.cakewallet.com:18081",
+    ),
+    MoneroNetwork.Testnet to listOf(
+        "http://node2.monerodevs.org:28089",
+    ),
+)
+
+suspend fun addDefaultRemoteNodes(appDatabase: AppDatabase) {
+    val dao = appDatabase.remoteNodeDao()
+    val nodes = DefaultNodeList.flatMap { (network, urls) ->
+        urls.map { url ->
+            RemoteNode(network = network, uri = Uri.parse(url)).asEntity()
+        }
+    }.toTypedArray()
+    dao.upsert(*nodes)
+}

demo/android/src/main/kotlin/im/molly/monero/demo/MainApplication.kt

@@ -12,7 +12,6 @@ import im.molly.monero.isIsolatedProcess
 val Context.preferencesDataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")
 
 class MainApplication : Application() {
-
     override fun onCreate() {
         super.onCreate()
         StrictMode.setVmPolicy(
@@ -23,7 +22,12 @@ class MainApplication : Application() {
         if (isIsolatedProcess()) {
             return
         }
-        AppModule.provide(this)
+        AppModule.provide(
+            application = this,
+            populateInitialData = { db ->
+                addDefaultRemoteNodes(db)
+            },
+        )
         SyncService.start(this)
     }
 }

demo/android/src/main/kotlin/im/molly/monero/demo/ui/RemoteNodeList.kt

@@ -75,6 +75,7 @@ private fun RemoteNodeItem(
         headlineContent = {
             Text(
                 text = remoteNode.uri.toString(),
+                style = MaterialTheme.typography.labelLarge,
                 modifier = (if (enabled) Modifier else Modifier.alpha(0.3f)),
             )
         },