Use mock dialog values in preview

app/src/main/java/dev/lonami/talaria/data/DialogSource.kt

@@ -3,8 +3,12 @@ package dev.lonami.talaria.data
 import dev.lonami.talaria.bindings.Native
 import dev.lonami.talaria.model.Dialog
 
-object DialogSource {
-    fun loadDialogs(): List<Dialog> {
+interface DialogSource {
+    fun loadDialogs(): List<Dialog>;
+}
+
+class NativeDialogSource : DialogSource {
+    override fun loadDialogs(): List<Dialog> {
         val dialogs = mutableListOf<Dialog>()
 
         val dialogPtr = Native.getDialogs()
@@ -23,3 +27,13 @@ object DialogSource {
         return dialogs
     }
 }
+
+class MockDialogSource : DialogSource {
+    override fun loadDialogs(): List<Dialog> {
+        val dialogs = mutableListOf<Dialog>()
+        for (i in 0 until 10) {
+            dialogs.add(Dialog("Sample Dialog $i", "Sample Message $i", i == 0))
+        }
+        return dialogs
+    }
+}

app/src/main/java/dev/lonami/talaria/ui/DialogScreen.kt

@@ -21,6 +21,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import dev.lonami.talaria.R
+import dev.lonami.talaria.data.MockDialogSource
 import dev.lonami.talaria.model.Dialog
 import dev.lonami.talaria.ui.theme.TalariaTheme
 
@@ -69,7 +70,8 @@ fun DialogScreen(
 @Preview
 @Composable
 fun DialogPreview() {
+    val viewModel = DialogViewModel(MockDialogSource())
     TalariaTheme {
-        DialogScreen(onDialogSelected = { })
+        DialogScreen(onDialogSelected = { }, dialogViewModel = viewModel)
     }
 }

app/src/main/java/dev/lonami/talaria/ui/DialogViewModel.kt

@@ -2,16 +2,17 @@ package dev.lonami.talaria.ui
 
 import androidx.lifecycle.ViewModel
 import dev.lonami.talaria.data.DialogSource
+import dev.lonami.talaria.data.NativeDialogSource
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 
-class DialogViewModel : ViewModel() {
+class DialogViewModel(private val repository: DialogSource = NativeDialogSource()) : ViewModel() {
     private val _uiState = MutableStateFlow(DialogUiState())
     val uiState: StateFlow<DialogUiState> = _uiState.asStateFlow()
 
     private fun loadDialogs() {
-        _uiState.value = DialogUiState(DialogSource.loadDialogs())
+        _uiState.value = DialogUiState(repository.loadDialogs())
     }
 
     init {