feat: add self-chat (#13)

Reviewed-on: #13

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

@@ -35,9 +35,7 @@ class NostrForegroundService : Service() {
     override fun onCreate() {
         super.onCreate()
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
         createNotificationChannel()
-        }
         val notification = createNotification()
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {

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

@@ -1,6 +1,7 @@
 package su.reya.coop.screens
 
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.IntrinsicSize
@@ -47,6 +48,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+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_arrow_back
@@ -235,10 +237,15 @@ fun ChatScreen(id: Long) {
                                 .fillMaxWidth(),
                             contentAlignment = Alignment.Center
                         ) {
-                            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                            Column(
+                                horizontalAlignment = Alignment.CenterHorizontally,
+                                verticalArrangement = Arrangement.spacedBy(4.dp),
+                            ) {
                                 Text(
                                     text = "No messages yet",
-                                    style = MaterialTheme.typography.titleLargeEmphasized,
+                                    style = MaterialTheme.typography.titleLargeEmphasized.copy(
+                                        fontWeight = FontWeight.SemiBold
+                                    ),
                                     color = MaterialTheme.colorScheme.onSurface
                                 )
                                 Text(

composeApp/src/androidMain/kotlin/su/reya/coop/shared/RoomHelper.kt

@@ -9,25 +9,32 @@ import su.reya.coop.Room
 import su.reya.coop.short
 
 fun Room.displayNameFlow(viewModel: NostrViewModel): Flow<String> {
-    if (!subject.isNullOrBlank()) return flowOf<String>(subject!!)
+    // Return early if there's a custom subject/room name
+    subject?.takeIf { it.isNotBlank() }?.let { return flowOf(it) }
 
-    val memberFlows = members.map { viewModel.getMetadata(it) }
+    val displayMembers = if (isGroup()) members.take(2) else members.take(1)
+    if (displayMembers.isEmpty()) return flowOf("Unknown")
+
+    return combine(displayMembers.map { viewModel.getMetadata(it) }) { metadataArray ->
+        val names = metadataArray.mapIndexed { i, metadata ->
+            val profile = metadata?.asRecord()
+            profile?.name?.takeIf { it.isNotBlank() }
+                ?: profile?.displayName?.takeIf { it.isNotBlank() }
+                ?: displayMembers[i].short()
+        }
 
-    return combine(memberFlows) { metadataArray ->
         if (isGroup()) {
-            val profiles = metadataArray.map { it?.asRecord() }
+            val combined = names.joinToString(", ")
-            val names = profiles.take(2).mapNotNull { it?.name ?: it?.displayName }
+            val extraCount = members.size - names.size
-            var combined = names.joinToString(", ")
+            if (extraCount > 0) "$combined, +$extraCount" else combined
-            if (profiles.size > 2) combined += ", +${profiles.size - 2}"
-            combined.ifBlank { "Unknown group" }
         } else {
-            val profile = metadataArray.firstOrNull()?.asRecord()
+            val name = names.first()
-            profile?.name ?: profile?.displayName ?: members.firstOrNull()?.short() ?: "Unknown"
+            if (displayMembers.first() == viewModel.currentUser()) "$name (you)" else name
         }
     }
 }
 
 fun Room.pictureFlow(viewModel: NostrViewModel): Flow<String?> {
-    val firstMember = members.firstOrNull() ?: return kotlinx.coroutines.flow.flowOf(null)
+    val firstMember = members.firstOrNull() ?: return flowOf(null)
     return viewModel.getMetadata(firstMember).map { it?.asRecord()?.picture }
 }

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

@@ -55,6 +55,7 @@ import rust.nostr.sdk.giftWrapAsync
 import rust.nostr.sdk.initLogger
 import rust.nostr.sdk.nip17ExtractRelayList
 import kotlin.time.Duration
+import kotlin.time.Duration.Companion.milliseconds
 
 object NostrManager {
     val instance = Nostr()
@@ -228,7 +229,7 @@ class Nostr {
 
             client?.subscribe(
                 target = ReqTarget.manual(target),
-                id = "all-gift-wraps"
+                id = "gift-wraps"
             )
         } catch (e: Exception) {
             throw IllegalStateException("Failed to fetch user messages: ${e.message}", e)
@@ -293,7 +294,7 @@ class Nostr {
                                     eoseTrackerJob?.cancel()
                                     // Start a new tracker
                                     eoseTrackerJob = launch {
-                                        delay(10000) // Wait for 10 seconds
+                                        delay(10000.milliseconds) // Wait for 10 seconds
                                         onSubscriptionClose()
                                     }
 
@@ -312,7 +313,7 @@ class Nostr {
                         is RelayMessageEnum.EndOfStoredEvents -> {
                             val subscriptionId = message.subscriptionId
 
-                            if (subscriptionId == "all-gift-wraps" || subscriptionId == "newest-gift-wraps") {
+                            if (subscriptionId == "gift-wraps") {
                                 onSubscriptionClose()
                             }
                         }
@@ -366,7 +367,7 @@ class Nostr {
                 Tag.identifier(giftId.toHex()),
                 Tag.event(rumor.id()!!),
                 Tag.reference(roomId.toString()),
-                Tag.custom(TagKind.Unknown("k"), listOf("dm"))
+                Tag.custom(TagKind.Unknown("k"), listOf("14"))
             )
 
             // Set event kind
@@ -395,7 +396,6 @@ class Nostr {
         // Try to unwrap the gift with each signer
         for (signer in signers) {
             try {
-                // TODO: custom unwrapping logic
                 val gift = UnwrappedGift.fromGiftWrapAsync(signer = signer, giftWrap = event)
                 val rumor = gift.rumor()
                 // Save the rumor to the database
@@ -644,6 +644,8 @@ class Nostr {
             return events
                 ?.toVec()
                 ?.map { UnsignedEvent.fromJson(it.content()) }
+                // Filter out events without public keys (receivers)
+                ?.filter { it.tags().publicKeys().isNotEmpty() }
                 ?.sortedByDescending { it.createdAt().asSecs() } ?: emptyList()
         } catch (e: Exception) {
             throw IllegalStateException("Failed to get chat room messages: ${e.message}", e)
@@ -697,7 +699,7 @@ class Nostr {
     }
 
     suspend fun sendMessage(
-        to: List<PublicKey>,
+        to: Set<PublicKey>,
         content: String,
         subject: String? = null,
         replies: List<EventId> = emptyList(),
@@ -723,17 +725,16 @@ class Nostr {
 
             // Add public key tags for each recipient
             to.forEach { pubkey ->
-                if (pubkey != currentUser) {
                 tags.add(Tag.publicKey(pubkey))
             }
-            }
 
-            for (receiver in listOf(currentUser) + to) {
+            for (receiver in setOf(currentUser) + to) {
                 // Construct the rumor event
                 // NEVER SIGN this event with the current user signer
                 val rumor = EventBuilder
                     .privateMsgRumor(receiver = receiver, message = content)
                     .tags(tags)
+                    .allowSelfTagging()
                     .build(currentUser)
                     // Ensure the event ID is set
                     .ensureId()

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

@@ -248,7 +248,7 @@ class NostrViewModel(
                     // Get chat rooms
                     val rooms = nostr.getChatRooms() ?: emptySet()
                     if (rooms.isNotEmpty()) {
-                        _chatRooms.value = rooms
+                        mergeChatRooms(rooms)
                         _isPartialProcessedGiftWrap.value = true
                     }
 
@@ -476,7 +476,7 @@ class NostrViewModel(
 
             // Update the chat rooms state
             _chatRooms.update { currentRooms ->
-                currentRooms + room
+                (currentRooms + room).sortedDescending().toSet()
             }
 
             return room.id
@@ -490,21 +490,29 @@ class NostrViewModel(
             ?: throw IllegalArgumentException("Room not found")
     }
 
+    private fun mergeChatRooms(rooms: Set<Room>) {
+        _chatRooms.update { currentRooms ->
+            val merged = currentRooms.associateBy { it.id }.toMutableMap()
+            // Add or update rooms from the database
+            rooms.forEach { room ->
+                merged[room.id] = room
+            }
+            // Return as a sorted set to maintain UI consistency
+            merged.values.sortedDescending().toSet()
+        }
+    }
+
     fun getChatRooms() {
         viewModelScope.launch {
             val rooms = nostr.getChatRooms() ?: emptySet()
-            _chatRooms.update { currentRooms ->
+            mergeChatRooms(rooms)
-                val virtualRooms = currentRooms.filter { local ->
-                    rooms.none { db -> db.id == local.id }
-                }
-                rooms + virtualRooms
-            }
         }
     }
 
     suspend fun refreshChatRooms() {
         try {
-            _chatRooms.value = nostr.getChatRooms() ?: emptySet()
+            val rooms = nostr.getChatRooms() ?: emptySet()
+            mergeChatRooms(rooms)
         } catch (e: Exception) {
             showError("Error: ${e.message}")
         }
@@ -540,7 +548,7 @@ class NostrViewModel(
             try {
                 val room = getChatRoom(roomId)
                 nostr.sendMessage(
-                    to = room.members.toList(),
+                    to = room.members,
                     content = message,
                     subject = room.subject,
                     replies = replies,