composeApp/src/androidMain/kotlin/su/reya/coop/App.kt

@@ -3,6 +3,7 @@ package su.reya.coop
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
 import androidx.compose.material3.MaterialExpressiveTheme
+import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.dynamicDarkColorScheme
 import androidx.compose.material3.dynamicLightColorScheme
@@ -32,6 +33,10 @@ val LocalNostrViewModel = staticCompositionLocalOf<NostrViewModel> {
     error("No NostrViewModel provided")
 }
 
+val LocalSnackbarHostState = staticCompositionLocalOf<SnackbarHostState> {
+    error("No SnackbarHostState provided")
+}
+
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 fun App(dbPath: String) {
@@ -53,24 +58,32 @@ fun App(dbPath: String) {
         else -> expressiveLightColorScheme()
     }
 
+    // Snackbar
+    val snackbarHostState = remember { SnackbarHostState() }
+
     LaunchedEffect(Unit) {
         viewModel.initAndConnect(dbPath)
+        viewModel.startNotificationHandler()
         viewModel.getChatRooms()
+        viewModel.errorEvents.collect { message ->
+            snackbarHostState.showSnackbar(message)
+        }
     }
 
     MaterialExpressiveTheme(
         colorScheme = colorScheme,
     ) {
-        CompositionLocalProvider(LocalNostrViewModel provides viewModel) {
+        CompositionLocalProvider(
+            LocalNostrViewModel provides viewModel,
+            LocalSnackbarHostState provides snackbarHostState,
+        ) {
             rememberCoroutineScope()
             val navController = rememberNavController()
-            val hasSecret by viewModel.hasSecret.collectAsState(initial = null)
+            val emptySecret by viewModel.emptySecret.collectAsState(initial = null)
 
-            LaunchedEffect(hasSecret) {
+            LaunchedEffect(emptySecret) {
                 // Navigate to the home screen if the secret is already set
-                if (hasSecret == true) {
+                if (emptySecret == false) {
-                    // Start a background notification handler
-                    viewModel.startNotificationHandler()
                     // Get chat rooms
                     viewModel.getChatRooms()
                     // Navigate to the home screen
@@ -81,11 +94,11 @@ fun App(dbPath: String) {
             }
 
             // Show loading screen while initializing
-            if (hasSecret == null) return@CompositionLocalProvider
+            if (emptySecret == null) return@CompositionLocalProvider
 
             NavHost(
                 navController = navController,
-                startDestination = if (hasSecret == true) Screen.Home else Screen.Onboarding
+                startDestination = if (emptySecret == false) Screen.Home else Screen.Onboarding
             ) {
                 composable<Screen.Onboarding> { backStackEntry ->
                     OnboardingScreen(

composeApp/src/androidMain/kotlin/su/reya/coop/screens/NewIdentityScreen.kt

@@ -20,6 +20,8 @@ import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
 import androidx.compose.material3.LoadingIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -33,6 +35,7 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.unit.dp
 import coil3.compose.AsyncImage
+import su.reya.coop.LocalSnackbarHostState
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
@@ -40,6 +43,7 @@ fun NewIdentityScreen(
     isLoading: Boolean,
     onSave: (name: String, bio: String, picture: Uri?) -> Unit
 ) {
+    val snackbarHostState = LocalSnackbarHostState.current
     var name by remember { mutableStateOf("") }
     var bio by remember { mutableStateOf("") }
     var picture by remember { mutableStateOf<Uri?>(null) }
@@ -49,6 +53,16 @@ fun NewIdentityScreen(
             picture = uri
         }
 
+    Scaffold(
+        containerColor = MaterialTheme.colorScheme.surfaceContainer,
+        snackbarHost = { SnackbarHost(snackbarHostState) },
+        content = { innerPadding ->
+            Surface(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .padding(top = innerPadding.calculateTopPadding()),
+                color = MaterialTheme.colorScheme.surfaceContainer,
+            ) {
                 Column(
                     modifier = Modifier
                         .fillMaxSize()
@@ -57,10 +71,6 @@ fun NewIdentityScreen(
                     horizontalAlignment = Alignment.CenterHorizontally,
                     verticalArrangement = Arrangement.spacedBy(16.dp)
                 ) {
-        Text(
-            text = "New Identity",
-            style = MaterialTheme.typography.headlineMediumEmphasized
-        )
                     Box(
                         modifier = Modifier
                             .size(120.dp)
@@ -116,3 +126,6 @@ fun NewIdentityScreen(
                     }
                 }
             }
+        }
+    )
+}

shared/src/commonMain/kotlin/su/reya/coop/NostrViewModel.kt

@@ -7,6 +7,7 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.coroutines.withTimeoutOrNull
@@ -23,8 +24,8 @@ class NostrViewModel(
     private val nostr: Nostr,
     private val secretStore: SecretStorage
 ) : ViewModel() {
-    private val _hasSecret = MutableStateFlow<Boolean?>(null)
+    private val _emptySecret = MutableStateFlow<Boolean?>(null)
-    val hasSecret = _hasSecret.asStateFlow()
+    val emptySecret = _emptySecret.asStateFlow()
 
     private val _isCreating = MutableStateFlow(false)
     val isCreating = _isCreating.asStateFlow()
@@ -32,6 +33,9 @@ class NostrViewModel(
     private val _chatRooms = MutableStateFlow<Set<Room>>(emptySet())
     val chatRooms = _chatRooms.asStateFlow()
 
+    private val _errorEvents = Channel<String>(Channel.BUFFERED)
+    val errorEvents = _errorEvents.receiveAsFlow()
+
     private val _metadataStore = mutableMapOf<PublicKey, MutableStateFlow<Metadata?>>()
     private val metadataRequestChannel = Channel<PublicKey>(Channel.UNLIMITED)
     private val seenPublicKeys = mutableSetOf<PublicKey>()
@@ -40,6 +44,12 @@ class NostrViewModel(
         startMetadataBatchProcessor()
     }
 
+    private fun showError(message: String) {
+        viewModelScope.launch {
+            _errorEvents.send(message)
+        }
+    }
+
     private fun startMetadataBatchProcessor() {
         viewModelScope.launch {
             val batch = mutableSetOf<PublicKey>()
@@ -91,11 +101,7 @@ class NostrViewModel(
     }
 
     fun getUserProfile(): StateFlow<Metadata?> {
-        return try {
+        return getMetadata(nostr.userPubkey!!)
-            getMetadata(nostr.userPubkey!!)
-        } catch (e: Exception) {
-            MutableStateFlow(null)
-        }
     }
 
     fun initAndConnect(dbPath: String) {
@@ -108,7 +114,7 @@ class NostrViewModel(
                 // Get user's secret
                 getUserSecret()
             } catch (e: Exception) {
-                println("Failed to connect: ${e.message}")
+                showError("Failed to initialize Nostr: ${e.message}")
             }
         }
     }
@@ -121,31 +127,43 @@ class NostrViewModel(
         }
     }
 
+    fun logout() {
+        viewModelScope.launch {
+            _emptySecret.value = true
+            _chatRooms.value = emptySet()
+            secretStore.clear("user_signer")
+            nostr.exit()
+        }
+    }
+
     suspend fun getUserSecret() {
         // Get user's signer secret
         val secret = secretStore.get("user_signer")
 
         // If no secret is found, show onboarding screen
-        if (secret == null) {
+        when (secret) {
-            _hasSecret.value = false
+            null -> {
+                _emptySecret.value = true
                 return
             }
-        _hasSecret.value = true
+
+            else -> _emptySecret.value = false
+        }
 
         // Handle different signer types
         if (secret.startsWith("nsec1")) {
             val keys = Keys.parse(secret)
             nostr.setKeySigner(keys)
         } else if (secret.startsWith("bunker://")) {
+            try {
                 val appKeys = getOrInitAppKeys()
                 val bunker = NostrConnectUri.parse(secret)
-            val remote = NostrConnect(
+                val timeout = Duration.parse("50") // 50 seconds timeout
-                uri = bunker,
+                val remote = NostrConnect(uri = bunker, appKeys = appKeys, timeout = timeout, null)
-                appKeys = appKeys,
-                timeout = Duration.parse("5"),
-                opts = null
-            )
                 nostr.setRemoteSigner(remote)
+            } catch (e: Exception) {
+                showError("Error: ${e.message}")
+            }
         } else {
             throw IllegalArgumentException("Invalid secret format: $secret")
         }
@@ -178,21 +196,32 @@ class NostrViewModel(
                 // Save secret to the secret storage
                 secretStore.set("user_signer", secret)
             } catch (e: Exception) {
-                println("Create identity failed: $e")
+                showError("Error: ${e.message}")
             }
         }
     }
 
     fun importIdentity(secret: String) {
-        // TODO: Implement import
-    }
-
-    fun logout() {
         viewModelScope.launch {
-            _hasSecret.value = false
+            if (secret.startsWith("nsec1")) {
-            _chatRooms.value = emptySet()
+                val keys = Keys.parse(secret)
-            secretStore.clear("user_signer")
+                nostr.setKeySigner(keys)
-            nostr.exit()
+                secretStore.set("user_signer", secret)
+            } else if (secret.startsWith("bunker://")) {
+                try {
+                    val appKeys = getOrInitAppKeys()
+                    val bunker = NostrConnectUri.parse(secret)
+                    val timeout = Duration.parse("50") // 50 seconds timeout
+                    val remote =
+                        NostrConnect(uri = bunker, appKeys = appKeys, timeout = timeout, null)
+                    nostr.setRemoteSigner(remote)
+                    secretStore.set("user_signer", secret)
+                } catch (e: Exception) {
+                    showError("Error: ${e.message}")
+                }
+            } else {
+                showError("Please enter a valid Secret or Bunker URI.")
+            }
         }
     }
 
@@ -201,7 +230,7 @@ class NostrViewModel(
             try {
                 _chatRooms.value = nostr.getChatRooms() ?: emptySet()
             } catch (e: Exception) {
-                println("Failed to get chat rooms: ${e.message}")
+                showError("Error: ${e.message}")
             }
         }
     }