feat: implement basic notification (#6)

Reviewed-on: #6

composeApp/src/androidMain/AndroidManifest.xml

@@ -18,15 +18,29 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@android:style/Theme.Material.Light.NoActionBar">
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:theme="@style/Theme.App.Starting">
+
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="chat"
+                    android:scheme="coop" />
+            </intent-filter>
         </activity>
+
         <service
             android:name=".NostrForegroundService"
             android:enabled="true"

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

@@ -39,14 +39,13 @@ import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import androidx.navigation.navDeepLink
 import androidx.navigation.toRoute
 import kotlinx.coroutines.launch
-import su.reya.coop.coop.storage.SecretStore
 import su.reya.coop.screens.ChatScreen
 import su.reya.coop.screens.HomeScreen
 import su.reya.coop.screens.ImportScreen
@@ -72,7 +71,7 @@ val LocalNavController = staticCompositionLocalOf<NavController> {
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class, ExperimentalMaterial3Api::class)
 @Composable
-fun App() {
+fun App(viewModel: NostrViewModel) {
     val context = LocalContext.current
     val navController = rememberNavController()
     val scope = rememberCoroutineScope()
@@ -81,17 +80,15 @@ fun App() {
     // Snackbar
     val snackbarHostState = remember { SnackbarHostState() }
 
-    // Initialize Nostr View Model and Secret Store
-    val secretStore = remember { SecretStore(context) }
-    val viewModel: NostrViewModel = viewModel { NostrViewModel(NostrManager.instance, secretStore) }
-
     // Enabled the dynamic color scheme
     val colorScheme = when {
+        // Enable the dynamic color scheme for Android 12+
         android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S -> {
             if (darkMode) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
         }
-
+        // When dark mode is enabled, use the dark color scheme
         darkMode -> darkColorScheme()
+        // Fallback to the light color scheme
         else -> expressiveLightColorScheme()
     }
 
@@ -111,21 +108,107 @@ fun App() {
             LocalSnackbarHostState provides snackbarHostState,
             LocalNavController provides navController,
         ) {
-            val emptySecret by viewModel.emptySecret.collectAsState(initial = null)
+            val signerRequired by viewModel.signerRequired.collectAsState(initial = null)
             val isRelayListEmpty by viewModel.isRelayListEmpty.collectAsState()
             val sheetState = rememberModalBottomSheetState()
 
-            LaunchedEffect(emptySecret) {
+            LaunchedEffect(signerRequired) {
                 // Navigate to the home screen if the secret is already set
-                if (emptySecret == false) {
+                if (signerRequired == false) {
                     navController.navigate(Screen.Home) {
                         popUpTo(Screen.Onboarding) { inclusive = true }
                     }
                 }
             }
 
-            // Show loading screen while initializing
-            if (emptySecret == null) return@CompositionLocalProvider
+            // Keep the splash screen visible until the secret check is complete
+            if (signerRequired == null) {
+                return@CompositionLocalProvider
+            }
+
+            NavHost(
+                navController = navController,
+                startDestination = if (signerRequired!!) Screen.Onboarding else Screen.Home
+            ) {
+                composable<Screen.Onboarding> { backStackEntry ->
+                    OnboardingScreen(
+                        onOpenImport = { navController.navigate(Screen.Import) },
+                        onOpenNew = { navController.navigate(Screen.NewIdentity) }
+                    )
+                }
+                composable<Screen.Import> { backStackEntry ->
+                    val isCreating by viewModel.isCreating.collectAsState()
+
+                    ImportScreen(
+                        isLoading = isCreating,
+                        onBack = { navController.popBackStack() },
+                        onSave = { secret ->
+                            viewModel.importIdentity(secret)
+                        }
+                    )
+                }
+                composable<Screen.NewIdentity> { backStackEntry ->
+                    val isCreating by viewModel.isCreating.collectAsState()
+
+                    NewIdentityScreen(
+                        isLoading = isCreating,
+                        onBack = { navController.popBackStack() },
+                        onSave = { name, bio, uri ->
+                            val contentType = uri?.let { context.contentResolver.getType(it) }
+                            val picture = uri?.let {
+                                context.contentResolver.openInputStream(it)?.use { input ->
+                                    input.readBytes()
+                                }
+                            }
+                            viewModel.createIdentity(name, bio, picture, contentType)
+                        }
+                    )
+                }
+                composable<Screen.Home> { backStackEntry ->
+                    HomeScreen(
+                        onOpenChat = { id -> navController.navigate(Screen.Chat(id)) },
+                        onNewChat = { navController.navigate(Screen.NewChat) }
+                    )
+                }
+                composable<Screen.Chat>(
+                    deepLinks = listOf(
+                        navDeepLink<Screen.Chat>(basePath = "coop://chat")
+                    )
+                ) { backStackEntry ->
+                    val chat: Screen.Chat = backStackEntry.toRoute()
+                    ChatScreen(
+                        id = chat.id,
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+                composable<Screen.Profile> { backStackEntry ->
+                    val profile: Screen.Profile = backStackEntry.toRoute()
+                    ProfileScreen(
+                        pubkey = profile.pubkey,
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+                composable<Screen.NewChat> { backStackEntry ->
+                    NewChatScreen(
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+                composable<Screen.Scan> { backStackEntry ->
+                    ScanScreen(
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+                composable<Screen.MyQr> { backStackEntry ->
+                    MyQrScreen(
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+                composable<Screen.Relay> { backStackEntry ->
+                    RelayScreen(
+                        onBack = { navController.popBackStack() },
+                    )
+                }
+            }
 
             // Show the relay setup dialog if the msg relay list is empty
             if (isRelayListEmpty) {
@@ -181,86 +264,6 @@ fun App() {
                     }
                 }
             }
-
-            NavHost(
-                navController = navController,
-                startDestination = if (emptySecret == false) Screen.Home else Screen.Onboarding
-            ) {
-                composable<Screen.Onboarding> { backStackEntry ->
-                    OnboardingScreen(
-                        onOpenImport = { navController.navigate(Screen.Import) },
-                        onOpenNew = { navController.navigate(Screen.NewIdentity) }
-                    )
-                }
-                composable<Screen.Import> { backStackEntry ->
-                    val isCreating by viewModel.isCreating.collectAsState()
-
-                    ImportScreen(
-                        isLoading = isCreating,
-                        onBack = { navController.popBackStack() },
-                        onSave = { secret ->
-                            viewModel.importIdentity(secret)
-                        }
-                    )
-                }
-                composable<Screen.NewIdentity> { backStackEntry ->
-                    val isCreating by viewModel.isCreating.collectAsState()
-
-                    NewIdentityScreen(
-                        isLoading = isCreating,
-                        onBack = { navController.popBackStack() },
-                        onSave = { name, bio, uri ->
-                            val contentType = uri?.let { context.contentResolver.getType(it) }
-                            val picture = uri?.let {
-                                context.contentResolver.openInputStream(it)?.use { input ->
-                                    input.readBytes()
-                                }
-                            }
-                            viewModel.createIdentity(name, bio, picture, contentType)
-                        }
-                    )
-                }
-                composable<Screen.Home> { backStackEntry ->
-                    HomeScreen(
-                        onOpenChat = { id -> navController.navigate(Screen.Chat(id)) },
-                        onNewChat = { navController.navigate(Screen.NewChat) }
-                    )
-                }
-                composable<Screen.Chat> { backStackEntry ->
-                    val chat: Screen.Chat = backStackEntry.toRoute()
-                    ChatScreen(
-                        id = chat.id,
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-                composable<Screen.Profile> { backStackEntry ->
-                    val profile: Screen.Profile = backStackEntry.toRoute()
-                    ProfileScreen(
-                        pubkey = profile.pubkey,
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-                composable<Screen.NewChat> { backStackEntry ->
-                    NewChatScreen(
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-                composable<Screen.Scan> { backStackEntry ->
-                    ScanScreen(
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-                composable<Screen.MyQr> { backStackEntry ->
-                    MyQrScreen(
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-                composable<Screen.Relay> { backStackEntry ->
-                    RelayScreen(
-                        onBack = { navController.popBackStack() },
-                    )
-                }
-            }
         }
     }
 }

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

@@ -6,25 +6,48 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.activity.viewModels
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import su.reya.coop.coop.storage.SecretStore
 
 class MainActivity : ComponentActivity() {
+    private val viewModel: NostrViewModel by viewModels {
+        object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                val secretStore = SecretStore(this@MainActivity)
+                return NostrViewModel(NostrManager.instance, secretStore) as T
+            }
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
-        installSplashScreen()
+        val splashScreen = installSplashScreen()
         enableEdgeToEdge()
 
         super.onCreate(savedInstanceState)
 
-        val intent = Intent(this, NostrForegroundService::class.java)
+        val serviceIntent = Intent(this, NostrForegroundService::class.java)
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            startForegroundService(intent)
+            startForegroundService(serviceIntent)
         } else {
-            startService(intent)
+            startService(serviceIntent)
+        }
+
+        // Keep the splash screen visible until the signer check is complete
+        splashScreen.setKeepOnScreenCondition {
+            viewModel.signerRequired.value == null
         }
 
         setContent {
-            App()
+            App(viewModel = viewModel)
         }
     }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+    }
 }

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

@@ -3,12 +3,14 @@ package su.reya.coop
 import android.app.Notification
 import android.app.NotificationChannel
 import android.app.NotificationManager
+import android.app.PendingIntent
 import android.app.Service
 import android.content.Intent
 import android.os.Build
 import android.os.IBinder
 import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
+import androidx.core.net.toUri
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.ProcessLifecycleOwner
 import kotlinx.coroutines.CoroutineScope
@@ -31,7 +33,8 @@ class NostrForegroundService : Service() {
     @RequiresApi(Build.VERSION_CODES.O)
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         createNotificationChannel()
-        val notification = createNotification("Connecting to Nostr...")
+
+        val notification = createNotification()
         startForeground(1, notification)
 
         serviceScope.launch {
@@ -43,11 +46,25 @@ class NostrForegroundService : Service() {
                 // Connect to bootstrap relays
                 nostr.connectBootstrapRelays()
                 // Handle notifications
-                nostr.handleLiteNotifications { event ->
-                    if (!isUserInApp()) {
-                        showNewMessageNotification(event.content())
+                nostr.handleNotifications(
+                    onMetadataUpdate = { pubkey, metadata ->
+                        serviceScope.launch { nostr.emitMetadataUpdate(pubkey, metadata) }
+                    },
+                    onContactListUpdate = { contacts ->
+                        serviceScope.launch { nostr.emitContactListUpdate(contacts) }
+                    },
+                    onSubscriptionClose = {
+                        serviceScope.launch { nostr.emitSubscriptionClosed() }
+                    },
+                    onNewMessage = { event ->
+                        serviceScope.launch {
+                            if (!isUserInApp()) {
+                                showNewMessageNotification(event.roomId(), event.content())
+                            }
+                            nostr.emitNewEvent(event)
+                        }
                     }
-                }
+                )
             } catch (e: Exception) {
                 println("Failed to start Nostr in background: ${e.message}")
             }
@@ -58,30 +75,68 @@ class NostrForegroundService : Service() {
 
     @RequiresApi(Build.VERSION_CODES.O)
     private fun createNotificationChannel() {
-        val channel = NotificationChannel(
-            "nostr_service",
-            "Nostr Background Service",
+        val manager = getSystemService(NotificationManager::class.java)
+
+        val serviceChannel = NotificationChannel(
+            "nostr_service_silent",
+            "Nostr Background Status",
+            NotificationManager.IMPORTANCE_MIN
+        ).apply {
+            setShowBadge(false)
+        }
+        manager?.createNotificationChannel(serviceChannel)
+
+        val messageChannel = NotificationChannel(
+            "nostr_messages",
+            "New Messages",
             NotificationManager.IMPORTANCE_HIGH
         )
-        val manager = getSystemService(NotificationManager::class.java)
-        manager?.createNotificationChannel(channel)
+        manager?.createNotificationChannel(messageChannel)
     }
 
-    private fun createNotification(content: String): Notification {
-        return NotificationCompat.Builder(this, "nostr_service")
-            .setContentTitle("Coop")
-            .setContentText(content)
-            .setSmallIcon(android.R.drawable.ic_menu_send)
+    private fun createNotification(content: String? = null): Notification {
+        val builder = NotificationCompat.Builder(this, "nostr_service")
+            .setSmallIcon(R.drawable.ic_notification)
             .setOngoing(true)
-            .build()
+            .setPriority(NotificationCompat.PRIORITY_MIN)
+            .setCategory(Notification.CATEGORY_SERVICE)
+
+        if (content != null) {
+            builder.setContentTitle("Coop")
+            builder.setContentText(content)
+        } else {
+            builder.setContentTitle("Coop is active")
+        }
+
+        return builder.build()
     }
 
-    private fun showNewMessageNotification(message: String) {
-        val notification = NotificationCompat.Builder(this, "nostr_service")
-            .setContentTitle("New Message")
+    private fun showNewMessageNotification(roomId: Long, message: String) {
+        val deepLinkUri = "coop://chat/$roomId".toUri()
+
+        val intent = Intent(
+            Intent.ACTION_VIEW,
+            deepLinkUri,
+            this,
+            MainActivity::class.java
+        )
+
+        val pendingIntent = PendingIntent.getActivity(
+            this,
+            roomId.toInt(),
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        
+        val notification = NotificationCompat.Builder(this, "nostr_messages")
+            .setSmallIcon(R.drawable.ic_notification)
+            .setContentTitle("You received a new message")
             .setContentText(message)
             .setAutoCancel(true)
+            .setContentIntent(pendingIntent)
+            .setCategory(Notification.CATEGORY_MESSAGE)
             .build()
+
         val manager = getSystemService(NotificationManager::class.java)
         manager?.notify(System.currentTimeMillis().toInt(), notification)
     }

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

@@ -19,6 +19,8 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Badge
+import androidx.compose.material3.BadgedBox
 import androidx.compose.material3.FilledTonalIconButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -37,6 +39,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -90,19 +93,16 @@ fun ChatScreen(
 
     var text by remember { mutableStateOf("") }
     var loading by remember { mutableStateOf(true) }
+    var newOtherMessages by remember { mutableIntStateOf(0) }
 
     val messages = remember { mutableStateListOf<UnsignedEvent>() }
     val groupedMessages = remember(messages.toList()) {
         messages.groupBy { it.createdAt().formatAsGroupHeader() }
     }
 
-    fun setLoading(value: Boolean) {
-        loading = value
-    }
-
     LaunchedEffect(id) {
         // Start loading spinner
-        setLoading(true)
+        loading = true
 
         // Get messages
         val initialMessages = viewModel.getChatRoomMessages(id)
@@ -122,7 +122,7 @@ fun ChatScreen(
         }
 
         // Stop loading spinner
-        setLoading(false)
+        loading = false
 
         // Handle new messages
         viewModel.newEvents.collect { event ->
@@ -130,6 +130,9 @@ fun ChatScreen(
                 if (event.id() !in messages.map { it.id() }) {
                     messages.add(0, event)
                 }
+            } else {
+                // If the event is not in the current room, it's a new message from another user
+                newOtherMessages++
             }
         }
     }
@@ -173,11 +176,21 @@ fun ChatScreen(
                     }
                 },
                 navigationIcon = {
-                    IconButton(onClick = onBack) {
-                        Icon(
-                            painter = painterResource(Res.drawable.ic_arrow_back),
-                            contentDescription = "Back"
-                        )
+                    BadgedBox(
+                        badge = {
+                            if (newOtherMessages > 0) {
+                                Badge {
+                                    Text(newOtherMessages.toString())
+                                }
+                            }
+                        }
+                    ) {
+                        IconButton(onClick = onBack) {
+                            Icon(
+                                painter = painterResource(Res.drawable.ic_arrow_back),
+                                contentDescription = "Back"
+                            )
+                        }
                     }
                 },
                 colors = TopAppBarDefaults.topAppBarColors(