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

@@ -1,27 +1,49 @@
 package su.reya.coop
 
 import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
 import androidx.compose.material3.MaterialExpressiveTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.Text
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.dynamicDarkColorScheme
 import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.material3.expressiveLightColorScheme
+import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
+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.toRoute
+import kotlinx.coroutines.launch
 import su.reya.coop.coop.storage.SecretStore
 import su.reya.coop.screens.ChatScreen
 import su.reya.coop.screens.HomeScreen
@@ -43,11 +65,12 @@ val LocalNavController = staticCompositionLocalOf<NavController> {
     error("No NavController provided")
 }
 
-@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@OptIn(ExperimentalMaterial3ExpressiveApi::class, ExperimentalMaterial3Api::class)
 @Composable
 fun App() {
     val context = LocalContext.current
     val navController = rememberNavController()
+    val scope = rememberCoroutineScope()
     val darkMode = isSystemInDarkTheme()
 
     // Snackbar
@@ -82,6 +105,8 @@ fun App() {
             LocalNavController provides navController,
         ) {
             val emptySecret by viewModel.emptySecret.collectAsState(initial = null)
+            val isRelayListEmpty by viewModel.isRelayListEmpty.collectAsState()
+            val sheetState = rememberModalBottomSheetState()
 
             LaunchedEffect(emptySecret) {
                 // Navigate to the home screen if the secret is already set
@@ -95,6 +120,61 @@ fun App() {
             // Show loading screen while initializing
             if (emptySecret == null) return@CompositionLocalProvider
 
+            // Show the relay setup dialog if the msg relay list is empty
+            if (isRelayListEmpty) {
+                ModalBottomSheet(
+                    onDismissRequest = { },
+                    sheetState = sheetState,
+                    containerColor = MaterialTheme.colorScheme.surfaceContainer,
+                ) {
+                    Column(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .fillMaxHeight(0.5f)
+                            .padding(24.dp),
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                    ) {
+                        Text(
+                            text = "Messaging Relays are required",
+                            style = MaterialTheme.typography.headlineSmallEmphasized.copy(
+                                fontWeight = FontWeight.SemiBold,
+                            ),
+                            textAlign = TextAlign.Center,
+                            color = MaterialTheme.colorScheme.primary,
+                        )
+                        Spacer(modifier = Modifier.size(8.dp))
+                        Text(
+                            text = "Coop cannot found your messaging relays. To send and receive messages on Coop, you need to set up at least one messaging relay.",
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                        Spacer(modifier = Modifier.size(8.dp))
+                        Text(
+                            text = "Please click the button below to continue with the default set of relays. You can always change them later in the settings.",
+                            style = MaterialTheme.typography.bodyLarge.copy(
+                                fontStyle = FontStyle.Italic,
+                            ),
+                        )
+                        Spacer(modifier = Modifier.weight(1f))
+                        Button(
+                            onClick = {
+                                scope.launch {
+                                    viewModel.useDefaultMsgRelayList()
+                                    sheetState.hide()
+                                }
+                            },
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .height(ButtonDefaults.MediumContainerHeight),
+                        ) {
+                            Text(
+                                text = "Continue",
+                                style = MaterialTheme.typography.titleMediumEmphasized,
+                            )
+                        }
+                    }
+                }
+            }
+
             NavHost(
                 navController = navController,
                 startDestination = if (emptySecret == false) Screen.Home else Screen.Onboarding

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

@@ -60,6 +60,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalClipboard
 import androidx.compose.ui.platform.toClipEntry
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import coop.composeapp.generated.resources.Res
 import coop.composeapp.generated.resources.ic_new_chat
@@ -214,7 +215,7 @@ fun HomeScreen(
                         )
                     }
                 ) {
-                    if (!isPartialProcessedGiftWrap && chatRooms.isEmpty()) {
+                    if (!isPartialProcessedGiftWrap) {
                         Box(
                             modifier = Modifier.fillMaxSize(),
                             contentAlignment = Alignment.Center
@@ -226,10 +227,15 @@ fun HomeScreen(
                             modifier = Modifier.fillMaxSize(),
                             contentAlignment = Alignment.Center
                         ) {
-                            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                            Column(
+                                horizontalAlignment = Alignment.CenterHorizontally,
+                                verticalArrangement = Arrangement.spacedBy(4.dp),
+                            ) {
                                 Text(
                                     text = "No chats yet",
-                                    style = MaterialTheme.typography.titleLargeEmphasized,
+                                    style = MaterialTheme.typography.titleLargeEmphasized.copy(
+                                        fontWeight = FontWeight.SemiBold
+                                    ),
                                     color = MaterialTheme.colorScheme.onSurface
                                 )
                                 Text(

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

@@ -348,7 +348,7 @@ class Nostr {
                         is RelayMessageEnum.EndOfStoredEvents -> {
                             val subscriptionId = message.subscriptionId
 
-                            if (subscriptionId == "messages") {
+                            if (subscriptionId == "all-gift-wraps" || subscriptionId == "newest-gift-wraps") {
                                 onSubscriptionClose()
                             }
                         }
@@ -471,7 +471,7 @@ class Nostr {
         return relayList
     }
 
-    private suspend fun getMsgRelayList(): List<RelayUrl> {
+    suspend fun getDefaultMsgRelayList(): List<RelayUrl> {
         // Construct a list of messaging relays
         val msgRelayList = listOf(
             RelayUrl.parse("wss://relay.0xchat.com"),
@@ -500,7 +500,7 @@ class Nostr {
         )
 
         // Send messaging relay list event
-        val msgRelayList = getMsgRelayList()
+        val msgRelayList = getDefaultMsgRelayList()
         val msgRelayListEvent = EventBuilder.nip17RelayList(msgRelayList).signWithKeys(keys)
 
         client?.sendEvent(
@@ -578,6 +578,39 @@ class Nostr {
         }
     }
 
+    suspend fun setMsgRelays(urls: List<RelayUrl>) {
+        try {
+            val event = EventBuilder.nip17RelayList(urls).signAsync(signer)
+
+            client?.sendEvent(
+                event = event,
+                target = SendEventTarget.toNip65(),
+                ackPolicy = AckPolicy.none(),
+            )
+
+            val kind = Kind.fromStd(KindStandard.INBOX_RELAYS);
+            val filter = Filter().kind(kind).author(signer.currentUser!!).limit(1u)
+            val target = ReqTarget.auto(listOf(filter))
+            val opts = SubscribeAutoCloseOptions().exitPolicy(ReqExitPolicy.ExitOnEose)
+
+            client?.subscribe(target = target, closeOn = opts)
+        } catch (e: Exception) {
+            throw IllegalStateException("Failed to set msg relays: ${e.message}", e)
+        }
+    }
+
+    suspend fun getMsgRelays(publicKey: PublicKey): List<RelayUrl> {
+        try {
+            val kind = Kind.fromStd(KindStandard.INBOX_RELAYS)
+            val filter = Filter().kind(kind).author(publicKey).limit(1u)
+            val events = client?.database()?.query(filter)
+
+            return nip17ExtractRelayList(events?.toVec()?.firstOrNull() ?: return emptyList())
+        } catch (e: Exception) {
+            throw IllegalStateException("Failed to get msg relays: ${e.message}", e)
+        }
+    }
+
     suspend fun getChatRooms(): Set<Room>? {
         try {
             val userPubkey = signer.currentUser ?: throw IllegalStateException("User not signed in")

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

@@ -7,6 +7,7 @@ import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
 import io.ktor.serialization.kotlinx.json.json
 import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -51,6 +52,9 @@ class NostrViewModel(
     private val _isPartialProcessedGiftWrap = MutableStateFlow(false)
     val isPartialProcessedGiftWrap = _isPartialProcessedGiftWrap.asStateFlow()
 
+    private val _isRelayListEmpty = MutableStateFlow(false)
+    val isRelayListEmpty = _isRelayListEmpty.asStateFlow()
+
     private val _newEvents = MutableSharedFlow<UnsignedEvent>(extraBufferCapacity = 100)
     val newEvents = _newEvents.asSharedFlow()
 
@@ -69,6 +73,7 @@ class NostrViewModel(
         startMetadataBatchHandler()
         getCacheMetadata()
         login()
+        observeSignerAndCheckRelays()
     }
 
     override fun onCleared() {
@@ -202,6 +207,25 @@ class NostrViewModel(
         }
     }
 
+    private fun observeSignerAndCheckRelays() {
+        viewModelScope.launch {
+            while (true) {
+                val pubkey = nostr.signer.currentUser
+
+                if (pubkey != null) {
+                    delay(3000)
+                    val relays = nostr.getMsgRelays(pubkey)
+                    if (relays.isEmpty()) {
+                        _isRelayListEmpty.value = true
+                    }
+                    break
+                }
+
+                delay(1000)
+            }
+        }
+    }
+
     private fun requestMetadata(pubkey: PublicKey) {
         if (seenPublicKeys.add(pubkey)) {
             viewModelScope.launch {
@@ -234,6 +258,10 @@ class NostrViewModel(
         }
     }
 
+    fun dismissRelayWarning() {
+        _isRelayListEmpty.value = false
+    }
+
     private suspend fun getOrInitAppKeys(): Keys {
         val secret = secretStore.get("app_keys")
 
@@ -349,6 +377,15 @@ class NostrViewModel(
         }
     }
 
+    suspend fun useDefaultMsgRelayList() {
+        try {
+            val defaultRelays = nostr.getDefaultMsgRelayList()
+            nostr.setMsgRelays(defaultRelays)
+        } catch (e: Exception) {
+            showError("Error: ${e.message}")
+        }
+    }
+
     fun createChatRoom(to: List<PublicKey>): Long {
         if (nostr.signer.currentUser == null) throw IllegalStateException("User not signed in")
         if (to.isEmpty()) throw IllegalArgumentException("At least one recipient is required")