UI: app navigation

examples/llama.android/app/src/main/java/com/example/llama/revamp/navigation/AppDestinations.kt

@@ -0,0 +1,47 @@
+package com.example.llama.revamp.navigation
+
+import androidx.navigation.NavController
+
+/**
+ * Navigation destinations for the app
+ */
+object AppDestinations {
+    const val MODEL_SELECTION_ROUTE = "model_selection"
+    const val MODE_SELECTION_ROUTE = "mode_selection"
+    const val CONVERSATION_ROUTE = "conversation"
+    const val BENCHMARK_ROUTE = "benchmark"
+    const val SETTINGS_ROUTE = "settings"
+}
+
+/**
+ * Navigation actions to be performed in the app
+ */
+class NavigationActions(private val navController: NavController) {
+
+    fun navigateToModelSelection() {
+        navController.navigate(AppDestinations.MODEL_SELECTION_ROUTE) {
+            // Clear back stack to start fresh
+            popUpTo(AppDestinations.MODEL_SELECTION_ROUTE) { inclusive = true }
+        }
+    }
+
+    fun navigateToModeSelection() {
+        navController.navigate(AppDestinations.MODE_SELECTION_ROUTE)
+    }
+
+    fun navigateToConversation() {
+        navController.navigate(AppDestinations.CONVERSATION_ROUTE)
+    }
+
+    fun navigateToBenchmark() {
+        navController.navigate(AppDestinations.BENCHMARK_ROUTE)
+    }
+
+    fun navigateToSettings(tab: String = "GENERAL") {
+        navController.navigate("${AppDestinations.SETTINGS_ROUTE}/$tab")
+    }
+
+    fun navigateUp() {
+        navController.navigateUp()
+    }
+}