idk

- added invite section to UI and some general bug fixes

android/app/src/main/AndroidManifest.xml

@@ -1,12 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://tools.android.com/tools">
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
-    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
-    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC"/>
-
 
     <application
         android:name=".ChatApplication"
@@ -22,7 +19,6 @@
 
         <service
             android:name=".core.service.MessageStreamService"
-            android:foregroundServiceType="dataSync"
             android:exported="false"/>
 
         <activity

android/app/src/main/java/dev/zxq5/chatapp/android/MainActivity.kt

@@ -1,9 +1,13 @@
 package dev.zxq5.chatapp.android
 
+import android.Manifest
+import android.os.Build
 import android.os.Bundle
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
@@ -62,14 +66,37 @@ class MainActivity : ComponentActivity() {
                 val currentScreen by chatViewModel.currentScreen.collectAsState()
                 val selectedChannelId by chatViewModel.channelId.collectAsState()
 
+                // Permission request launcher
+                val launcher = rememberLauncherForActivityResult(
+                    contract = ActivityResultContracts.RequestPermission(),
+                    onResult = { isGranted ->
+                        if (isGranted && authState == AuthState.Authenticated) {
+                            MessageStreamService.start(this@MainActivity)
+                        }
+                    }
+                )
+
                 LaunchedEffect(authState) {
                     when (authState) {
-                        AuthState.Authenticated -> MessageStreamService.start(this@MainActivity)
+                        AuthState.Authenticated -> {
+                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                                launcher.launch(Manifest.permission.POST_NOTIFICATIONS)
+                            }
+                            MessageStreamService.start(this@MainActivity)
+                            chatViewModel.loadAccessibleChannels()
+                        }
                         AuthState.Unauthenticated -> MessageStreamService.stop(this@MainActivity)
                         AuthState.AwaitingTotp -> {}
                     }
                 }
 
+                LaunchedEffect(Unit) {
+                    chatViewModel.onUnauthorized = {
+                        authViewModel.logout()
+                        chatViewModel.clearChat()
+                    }
+                }
+
                 LaunchedEffect(Unit) {
                     intent.getIntExtra("channel_id", -1).takeIf { it != -1 }?.let {
                         chatViewModel.switchChannel(it.toLong())

android/app/src/main/java/dev/zxq5/chatapp/android/api/ChatClient.kt

@@ -1,7 +1,9 @@
+@file:OptIn(ExperimentalUuidApi::class)
+
 package dev.zxq5.chatapp.android.api
 
 import dev.zxq5.chatapp.android.BuildConfig.BASE_URL
-import dev.zxq5.chatapp.android.api.model.Message
+import dev.zxq5.chatapp.android.api.model.ChatEvent
 import dev.zxq5.chatapp.android.api.model.SendMessage
 import dev.zxq5.chatapp.android.api.model.SpaceDto
 import io.ktor.client.HttpClient
@@ -25,6 +27,8 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.serialization.json.Json
 import kotlin.time.Clock
 import kotlin.time.ExperimentalTime
+import kotlin.uuid.ExperimentalUuidApi
+import kotlin.uuid.Uuid
 
 class ChatClient(private val token: String) {
 
@@ -45,18 +49,18 @@ class ChatClient(private val token: String) {
     suspend fun sendMessage(channelId: Long, userId: Int, text: String) {
         http.post("${BASE_URL}/api/chat/$channelId") {
             contentType(ContentType.Application.Json)
-            setBody(SendMessage(user_id = userId, text = text, timestamp = Clock.System.now()))
+            setBody(SendMessage(id = Uuid.random(), user_id = userId, text = text, timestamp = Clock.System.now()))
         }
     }
 
-    fun messageStream(channelId: Long): Flow<Message> = flow {
+    fun eventStream(channelId: Long): Flow<ChatEvent> = flow {
         http.prepareGet("${BASE_URL}/api/events/$channelId").execute { response ->
             val channel = response.bodyAsChannel()
             while (!channel.isClosedForRead) {
                 val line = channel.readLine() ?: break
                 if (line.startsWith("data:")) {
                     val json = line.removePrefix("data:").trim()
-                    runCatching { Json.decodeFromString<Message>(json) }
+                    runCatching { Json.decodeFromString<ChatEvent>(json) }
                         .onSuccess { emit(it) }
                 }
             }

android/app/src/main/java/dev/zxq5/chatapp/android/api/SettingsClient.kt

@@ -4,6 +4,7 @@ import android.util.Log
 import dev.zxq5.chatapp.android.BuildConfig.BASE_URL
 import dev.zxq5.chatapp.android.api.model.AccountDeleteRequest
 import dev.zxq5.chatapp.android.api.model.DisplayNameRequest
+import dev.zxq5.chatapp.android.api.model.InviteRequest
 import dev.zxq5.chatapp.android.api.model.PasswordChangeRequest
 import dev.zxq5.chatapp.android.api.model.QrResponse
 import dev.zxq5.chatapp.android.api.model.TOTPSixDigitCode
@@ -45,6 +46,22 @@ class SettingsClient(private val token: String) {
         }
     }
 
+    suspend fun createInvite(request: InviteRequest): ApiResult<String> {
+        return try {
+            val response = http.post("${BASE_URL}/api/invite") {
+                contentType(ContentType.Application.Json)
+                setBody(request)
+            }
+            if (response.status.isSuccess()) {
+                ApiResult.Success(response.body<String>())
+            } else {
+                ApiResult.HttpError(response.status.value, "Failed to create invite")
+            }
+        } catch (e: Exception) {
+            ApiResult.NetworkError(e.localizedMessage ?: "Network error")
+        }
+    }
+
     suspend fun getTotpQr(password: String): ApiResult<QrResponse> {
         return try {
             val response = http.post("${BASE_URL}/api/totp.jpg") {

android/app/src/main/java/dev/zxq5/chatapp/android/api/model/Event.kt

@@ -0,0 +1,60 @@
+@file:OptIn(ExperimentalUuidApi::class, ExperimentalTime::class)
+
+package dev.zxq5.chatapp.android.api.model
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.json.JsonClassDiscriminator
+import kotlin.time.ExperimentalTime
+import kotlin.time.Instant
+import kotlinx.serialization.Serializable
+import kotlin.uuid.ExperimentalUuidApi
+import kotlin.uuid.Uuid
+
+@OptIn(ExperimentalSerializationApi::class)
+@Serializable
+@JsonClassDiscriminator("type")
+sealed class ChatEvent {
+
+    @Serializable
+    @SerialName("SendMessage")
+    data class SendMessage(
+        val data: Message
+    ) : ChatEvent()
+
+    @Serializable
+    @SerialName("EditMessage")
+    data class EditMessage(
+        val data: EditMessageContent
+    ) : ChatEvent()
+
+    @Serializable
+    @SerialName("MessageAppendContent")
+    data class MessageAppendContent(
+        val data: AppendContent
+    ) : ChatEvent()
+}
+
+// tuple variants like (i64, ChatMsg) and (i64, String)
+// need wrapper classes since kotlinx can't deserialise
+// bare JSON arrays into data classes directly
+@Serializable
+data class EditMessageContent(
+    val id: Uuid,
+    val message: Message
+)
+
+@Serializable
+data class AppendContent (
+    val id: Uuid,
+    val content: String
+)
+
+@Serializable
+data class Message (
+    val id: Uuid,
+    val user_id: Int,
+    val display_name: String,
+    val text: String,
+    val timestamp: Instant
+)

android/app/src/main/java/dev/zxq5/chatapp/android/api/model/InviteRequest.kt

@@ -0,0 +1,13 @@
+package dev.zxq5.chatapp.android.api.model
+
+import kotlinx.serialization.Serializable
+import kotlin.time.ExperimentalTime
+import kotlin.time.Instant
+
+@Serializable
+data class InviteRequest @OptIn(ExperimentalTime::class) constructor(
+    val name: String,
+    val max_uses: Int,
+    val expiry_date: Instant,
+    val start_date: Instant
+)

android/app/src/main/java/dev/zxq5/chatapp/android/api/model/LoginState.kt

@@ -1,4 +1,4 @@
-package dev.zxq5.chatapp.android.model
+package dev.zxq5.chatapp.android.api.model
 
 sealed class LoginState {
     object Idle : LoginState()

android/app/src/main/java/dev/zxq5/chatapp/android/api/model/Message.kt

@@ -1,13 +0,0 @@
-package dev.zxq5.chatapp.android.api.model
-
-import kotlinx.serialization.Serializable
-import kotlin.time.ExperimentalTime
-import kotlin.time.Instant
-
-@Serializable
-data class Message @OptIn(ExperimentalTime::class) constructor(
-    val user_id: Int,
-    val display_name: String,
-    val text: String,
-    val timestamp: Instant
-)

android/app/src/main/java/dev/zxq5/chatapp/android/api/model/SendMessage.kt

@@ -3,9 +3,12 @@ package dev.zxq5.chatapp.android.api.model
 import kotlinx.serialization.Serializable
 import kotlin.time.ExperimentalTime
 import kotlin.time.Instant
+import kotlin.uuid.ExperimentalUuidApi
+import kotlin.uuid.Uuid
 
 @Serializable
-data class SendMessage @OptIn(ExperimentalTime::class) constructor(
+data class SendMessage @OptIn(ExperimentalTime::class, ExperimentalUuidApi::class) constructor(
+    val id: Uuid,
     val user_id: Int,
     val text: String,
     val timestamp: Instant

android/app/src/main/java/dev/zxq5/chatapp/android/core/data/TokenStore.kt

@@ -3,10 +3,12 @@ package dev.zxq5.chatapp.android.core.data
 import android.content.Context
 import android.content.SharedPreferences
 import android.util.Base64
+import android.util.Log
 import androidx.core.content.edit
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKey
 import org.json.JSONObject
+import java.time.Instant
 
 private const val KEY = "auth_token"
 private const val TWOFA_KEY = "twofa_enabled"
@@ -27,11 +29,37 @@ class TokenStore(appContext: Context) {
         )
     }
 
-    fun save(token: String) =
-        prefs().edit { putString(KEY, token) }
+    fun save(token: String) {
+        Log.d("TokenStore", "Saving token: $token")
+
+        prefs().edit { putString(KEY, token) }
+    }
+
+    fun get(): String? {
+        val ret = prefs().getString(KEY, null)
+        Log.d("TokenStore", "Retrieved token: $ret")
+        return ret
+    }
+
+    fun isExpired(): Boolean {
+        val token = get() ?: return true
+        return try {
+            val payload = token.split(".")[1]
+            val padded = payload + "==".take((4 - payload.length % 4) % 4)
+            val jsonString = String(Base64.decode(padded, Base64.URL_SAFE))
+            val json = JSONObject(jsonString)
+            if (json.has("exp")) {
+                val exp = json.getLong("exp")
+                val now = Instant.now().epochSecond
+                now >= exp
+            } else {
+                false // If no exp claim, assume not expired or handle differently
+            }
+        } catch (e: Exception) {
+            true // If we can't parse it, treat it as expired
+        }
+    }
 
-    fun get(): String? =
-        prefs().getString(KEY, null)
 
     fun save2faEnabled( enabled: Boolean) =
         prefs().edit { putBoolean(TWOFA_KEY, enabled) }

android/app/src/main/java/dev/zxq5/chatapp/android/core/service/MessageStreamService.kt

@@ -3,10 +3,10 @@ package dev.zxq5.chatapp.android.core.service
 import android.app.Service
 import android.content.Context
 import android.content.Intent
-import android.os.Build
 import android.os.IBinder
 import android.util.Log
 import dev.zxq5.chatapp.android.ChatApplication
+import dev.zxq5.chatapp.android.api.model.ChatEvent
 import dev.zxq5.chatapp.android.data.repository.ChatRepository
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -15,21 +15,17 @@ import kotlinx.coroutines.cancel
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.launch
 
-// core/service/MessageStreamService.kt
 class MessageStreamService : Service() {
 
     private val serviceScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
     private lateinit var notificationService: NotificationService
     private lateinit var chatRepository: ChatRepository
 
-    // which channel the user is currently looking at
-    // set by the ViewModel when the user opens/closes a channel
     var activeChannelId: Long? = null
         set(value) {
             field = value
             Log.d("Service", "activeChannelId set to $value")
             if (value != null) {
-                // restart stream with new channel
                 currentStreamJob?.cancel()
                 observeMessages()
             }
@@ -42,11 +38,7 @@ class MessageStreamService : Service() {
 
         fun start(context: Context) {
             val intent = Intent(context, MessageStreamService::class.java)
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                context.startForegroundService(intent)
-            } else {
-                context.startService(intent)
-            }
+            context.startService(intent)
         }
 
         fun stop(context: Context) {
@@ -62,33 +54,29 @@ class MessageStreamService : Service() {
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-        startForeground(
-            NotificationService.FOREGROUND_NOTIFICATION_ID,
-            notificationService.buildForegroundNotification()
-        )
         observeMessages()
-        return START_STICKY  // restart if killed
+        return START_STICKY
     }
 
     private fun observeMessages() {
         val channelId = activeChannelId ?: chatRepository.getLastActiveChannel()
-        Log.d("Service", "observeMessages called, channelId=$channelId")
-        if (channelId == null) {
-            Log.d("Service", "No channel to observe, waiting for switchChannel")
-            return
-        }
+        if (channelId == null) return
 
-        Log.d("Service", "Starting stream for channel $channelId")
         currentStreamJob = serviceScope.launch {
-            chatRepository.messageStream(channelId)
+            chatRepository.eventStream(channelId)
                 .catch { e -> Log.e("Service", "Stream error", e) }
-                .collect { message ->
-                    if (!ChatApplication.AppState.isInForeground) {  // no channel focused, always notify
-                        notificationService.showMessageNotification(
-                            conversationId = activeChannelId.toString(),
-                            senderName = message.display_name,
-                            messagePreview = message.text.take(80)
-                        )
+                .collect { event ->
+                    // Only show notification when an event (new message) is received
+                    // and the app is not in the foreground on this channel.
+                    if (!ChatApplication.AppState.isInForeground || activeChannelId != channelId) {
+                        when (event) {
+                            is ChatEvent.SendMessage -> notificationService.showMessageNotification(
+                                conversationId = channelId.toString(),
+                                senderName = event.data.display_name,
+                                messagePreview = event.data.text
+                            )
+                            else -> {}
+                        }
                     }
                 }
         }
@@ -101,4 +89,4 @@ class MessageStreamService : Service() {
         instance = null
         serviceScope.cancel()
     }
-}
+}

android/app/src/main/java/dev/zxq5/chatapp/android/core/service/NotificationService.kt

@@ -15,51 +15,41 @@ class NotificationService(private val context: Context) {
 
     companion object {
         const val CHANNEL_ID = "messages"
-        const val FOREGROUND_NOTIFICATION_ID = 1  // ← this needs to exist
+        const val SERVICE_CHANNEL_ID = "service"
+        const val FOREGROUND_NOTIFICATION_ID = 1
     }
 
     private val manager = context.getSystemService(NotificationManager::class.java)
 
-    fun createChannels() {
-        // channel for new message notifications
-        val messageChannel = NotificationChannel(
-            CHANNEL_ID,
-            "Messages",
-            NotificationManager.IMPORTANCE_HIGH
-        ).apply {
-            enableVibration(true)
+    fun createForegroundNotification(): Notification {
+        val intent = Intent(context, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
         }
-
-        // channel for the persistent foreground service notification
-        // low importance so it doesn't make noise
-        val serviceChannel = NotificationChannel(
-            "service",
-            "Background connection",
-            NotificationManager.IMPORTANCE_LOW
+        
+        val pendingIntent = PendingIntent.getActivity(
+            context,
+            0,
+            intent,
+            PendingIntent.FLAG_IMMUTABLE
         )
 
-        val mgr = context.getSystemService(NotificationManager::class.java)
-        mgr.createNotificationChannel(messageChannel)
-        mgr.createNotificationChannel(serviceChannel)
-    }
-
-    fun buildForegroundNotification(): Notification {
-        return NotificationCompat.Builder(context, "service")
+        return NotificationCompat.Builder(context, SERVICE_CHANNEL_ID)
             .setSmallIcon(R.drawable.ic_notification)
-            .setContentTitle("chatapp")
-            .setContentText("Connected")
+            .setContentTitle("Chat App")
+            .setContentText("Connecting to message stream...")
+            .setPriority(NotificationCompat.PRIORITY_LOW)
+            .setCategory(NotificationCompat.CATEGORY_SERVICE)
+            .setContentIntent(pendingIntent)
             .setOngoing(true)
-            .setSilent(true)
             .build()
     }
 
     fun showMessageNotification(
         conversationId: String,
         senderName: String,
-        messagePreview: String,   // for E2E this would be "New message" — no plaintext
+        messagePreview: String,
         notificationId: Int = conversationId.hashCode()
     ) {
-        // intent that opens the app to the right conversation when tapped
         val intent = Intent(context, MainActivity::class.java).apply {
             flags = Intent.FLAG_ACTIVITY_SINGLE_TOP
             putExtra("conversation_id", conversationId)
@@ -72,13 +62,13 @@ class NotificationService(private val context: Context) {
             PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
         )
 
-        val notification = NotificationCompat.Builder(context, "messages")
+        val notification = NotificationCompat.Builder(context, CHANNEL_ID)
             .setSmallIcon(R.drawable.ic_notification)
             .setContentTitle(senderName)
             .setContentText(messagePreview)
             .setPriority(NotificationCompat.PRIORITY_HIGH)
             .setContentIntent(pendingIntent)
-            .setAutoCancel(true)         // dismiss on tap
+            .setAutoCancel(true)
             .build()
 
         manager.notify(notificationId, notification)
@@ -91,4 +81,4 @@ class NotificationService(private val context: Context) {
     fun dismissAll() {
         manager.cancelAll()
     }
-}
+}

android/app/src/main/java/dev/zxq5/chatapp/android/data/repository/AuthRepository.kt

@@ -56,6 +56,10 @@ class AuthRepository(
 
     fun getAuthState(): AuthState {
         val token = tokenStore.get() ?: return AuthState.Unauthenticated
+        if (tokenStore.isExpired()) {
+            tokenStore.clear()
+            return AuthState.Unauthenticated
+        }
         return when (getScopeFromToken(token)) {
             TokenScope.FULL -> AuthState.Authenticated
             TokenScope.TOTP_PENDING -> AuthState.AwaitingTotp

android/app/src/main/java/dev/zxq5/chatapp/android/data/repository/ChatRepository.kt

@@ -1,6 +1,7 @@
 package dev.zxq5.chatapp.android.data.repository
 
 import dev.zxq5.chatapp.android.api.ChatClient
+import dev.zxq5.chatapp.android.api.model.ChatEvent
 import dev.zxq5.chatapp.android.core.data.TokenStore
 import dev.zxq5.chatapp.android.api.model.Message
 import dev.zxq5.chatapp.android.api.model.SpaceDto
@@ -43,8 +44,8 @@ class ChatRepository(private val tokenStore: TokenStore) {
         getChatClient()?.sendMessage(channelId, userId, text)
     }
 
-    fun messageStream(channelId: Long): Flow<Message> {
+    fun eventStream(channelId: Long): Flow<ChatEvent> {
         _lastActiveChannel = channelId
-        return getChatClient()?.messageStream(channelId) ?: emptyFlow()
+        return getChatClient()?.eventStream(channelId) ?: emptyFlow()
     }
 }

android/app/src/main/java/dev/zxq5/chatapp/android/data/repository/SettingsRepository.kt

@@ -2,6 +2,7 @@ package dev.zxq5.chatapp.android.data.repository
 
 import dev.zxq5.chatapp.android.api.model.QrResponse
 import dev.zxq5.chatapp.android.api.SettingsClient
+import dev.zxq5.chatapp.android.api.model.InviteRequest
 import dev.zxq5.chatapp.android.api.model.TotpStatus
 import dev.zxq5.chatapp.android.core.data.TokenStore
 import dev.zxq5.chatapp.android.core.error.ApiResult
@@ -25,6 +26,10 @@ class SettingsRepository(private val tokenStore: TokenStore) {
         _lastToken = null
     }
 
+    suspend fun createInvite(request: InviteRequest): ApiResult<String> {
+        return getSettingsClient()?.createInvite(request) ?: ApiResult.NetworkError("Not authenticated")
+    }
+
     suspend fun getTotpQr(password: String): ApiResult<QrResponse?> {
         val settingsClient = getSettingsClient() ?: return ApiResult.NetworkError("Not authenticated")
         return settingsClient.getTotpQr(password)

android/app/src/main/java/dev/zxq5/chatapp/android/feature/auth/AuthScreen.kt

@@ -3,7 +3,7 @@ package dev.zxq5.chatapp.android.feature.auth
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
-import dev.zxq5.chatapp.android.model.LoginState
+import dev.zxq5.chatapp.android.api.model.LoginState
 
 @Composable
 fun AuthScreen(viewModel: AuthViewModel) {

android/app/src/main/java/dev/zxq5/chatapp/android/feature/auth/AuthViewModel.kt

@@ -7,7 +7,7 @@ import dev.zxq5.chatapp.android.data.repository.AuthRepository
 import dev.zxq5.chatapp.android.data.repository.LoginResult
 import dev.zxq5.chatapp.android.data.repository.SignupResult
 import dev.zxq5.chatapp.android.data.repository.AuthState
-import dev.zxq5.chatapp.android.model.LoginState
+import dev.zxq5.chatapp.android.api.model.LoginState
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch

android/app/src/main/java/dev/zxq5/chatapp/android/feature/auth/LoginScreen.kt

@@ -28,7 +28,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
-import dev.zxq5.chatapp.android.model.LoginState
+import dev.zxq5.chatapp.android.api.model.LoginState
 import dev.zxq5.chatapp.android.ui.components.TextField
 
 @Composable

android/app/src/main/java/dev/zxq5/chatapp/android/feature/auth/SignupScreen.kt

@@ -28,7 +28,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
-import dev.zxq5.chatapp.android.model.LoginState
+import dev.zxq5.chatapp.android.api.model.LoginState
 import dev.zxq5.chatapp.android.ui.components.TextField
 
 @Composable

android/app/src/main/java/dev/zxq5/chatapp/android/feature/chat/ChatViewModel.kt

@@ -1,20 +1,25 @@
+@file:OptIn(ExperimentalUuidApi::class)
+
 package dev.zxq5.chatapp.android.feature.chat
 
 import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import dev.zxq5.chatapp.android.api.model.Channel
+import dev.zxq5.chatapp.android.api.model.ChatEvent
 import dev.zxq5.chatapp.android.data.repository.ChatRepository
 import dev.zxq5.chatapp.android.api.model.Message
-import dev.zxq5.chatapp.android.api.model.Space
 import dev.zxq5.chatapp.android.api.model.SpaceDto
 import dev.zxq5.chatapp.android.core.service.MessageStreamService
+import io.ktor.client.plugins.ResponseException
+import io.ktor.http.HttpStatusCode
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import kotlin.time.ExperimentalTime
+import kotlin.uuid.ExperimentalUuidApi
 
 class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
 
@@ -40,6 +45,8 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
     val channelError: StateFlow<String?> = _channelError
 
     private var streamJob: Job? = null
+    
+    var onUnauthorized: (() -> Unit)? = null
 
     init {
         _currentUserId.value = chatRepository.getUserId()
@@ -49,6 +56,7 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
 
     fun loadAccessibleChannels() {
         _error.value = null
+        _currentUserId.value = chatRepository.getUserId()
         viewModelScope.launch {
             runCatching {
                 chatRepository.getAccessibleChannels()
@@ -56,11 +64,16 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
                 _spaces.value = data
             }.onFailure { e ->
                 Log.e("Chat", "Failed to load spaces", e)
-                _error.value = "Failed to load channels: ${e.message}"
+                if (e is ResponseException && e.response.status == HttpStatusCode.Unauthorized) {
+                    onUnauthorized?.invoke()
+                } else {
+                    _error.value = "Failed to load channels: ${e.message}"
+                }
             }
         }
     }
 
+    @OptIn(ExperimentalTime::class)
     private fun observeChannel() {
         viewModelScope.launch {
             _channelId.collect { id ->
@@ -69,13 +82,40 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
                 _channelError.value = null
                 if (id != null) {
                     streamJob = launch {
-                        chatRepository.messageStream(id)
+                        chatRepository.eventStream(id)
                             .catch { e -> 
                                 Log.e("Chat", "Stream error", e)
-                                _channelError.value = "Connection lost: ${e.message}"
+                                if (e is ResponseException && e.response.status == HttpStatusCode.Unauthorized) {
+                                    onUnauthorized?.invoke()
+                                } else {
+                                    _channelError.value = "Connection lost: ${e.message}"
+                                }
                             }
-                            .collect { message ->
-                                _messages.update { it + message }
+                            .collect { event ->
+                                when (event) {
+                                    is ChatEvent.SendMessage -> {
+                                        _messages.update { it + event.data }
+                                    }
+                                    is ChatEvent.EditMessage -> {
+                                        _messages.update { messages ->
+                                            messages.map {
+                                                if (it.id == event.data.id) event.data.message
+                                                else it
+                                            }
+                                        }
+                                    }
+                                    is ChatEvent.MessageAppendContent -> {
+                                        _messages.update { messages ->
+                                            messages.map { msg ->
+                                                if (msg.id == event.data.id) {
+                                                    msg.copy(text = msg.text + event.data.content)
+                                                } else {
+                                                    msg
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
                             }
                     }
                 }
@@ -108,7 +148,11 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
                 )
             }.onFailure { e ->
                 Log.e("Chat", "Send message error", e)
-                _channelError.value = "Failed to send message"
+                if (e is ResponseException && e.response.status == HttpStatusCode.Unauthorized) {
+                    onUnauthorized?.invoke()
+                } else {
+                    _channelError.value = "Failed to send message"
+                }
             }
         }
     }
@@ -117,6 +161,7 @@ class ChatViewModel(private val chatRepository: ChatRepository) : ViewModel() {
         _messages.value = emptyList()
         _channelId.value = null
         _currentUserId.value = null
+        _spaces.value = emptyList()
         _error.value = null
         _channelError.value = null
         streamJob?.cancel()

android/app/src/main/java/dev/zxq5/chatapp/android/feature/chat/chat.kt

@@ -1,3 +1,5 @@
+@file:OptIn(ExperimentalUuidApi::class)
+
 package dev.zxq5.chatapp.android.feature.chat
 
 import androidx.compose.foundation.BorderStroke
@@ -65,6 +67,7 @@ import dev.zxq5.chatapp.android.api.model.Message
 import java.text.DateFormat
 import java.util.Date
 import kotlin.time.ExperimentalTime
+import kotlin.uuid.ExperimentalUuidApi
 
 @Composable
 fun ChatScreen(
@@ -277,7 +280,7 @@ fun MessageScreen(channelId: Long, viewModel: ChatViewModel, onBack: () -> Unit)
                 modifier = Modifier.weight(1f).padding(horizontal = 16.dp),
                 verticalArrangement = Arrangement.spacedBy(10.dp)
             ) {
-                items(messages) { message ->
+                items(messages, key = { it.id }) { message ->
                     MessageBubble(message, currentUserId)
                 }
                 item { Spacer(Modifier.height(10.dp)) }
@@ -378,7 +381,7 @@ fun MessageBubble(message: Message, currentUserId: Int?) {
         horizontalAlignment = if (isMe) Alignment.End else Alignment.Start
     ) {
         Surface(
-            color = if (isMe) MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f) else MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.2f),
+            color = if (isMe) MaterialTheme.colorScheme.surfaceVariant else MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.2f),
             shape = RoundedCornerShape(
                 topStart = 14.dp,
                 topEnd = 14.dp,
@@ -388,14 +391,7 @@ fun MessageBubble(message: Message, currentUserId: Int?) {
             border = border(0.5.dp, MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.5f))
         ) {
             Column(modifier = Modifier.padding(horizontal = 11.dp, vertical = 8.dp)) {
-                if (!isMe) {
-                    Text(
-                        message.display_name?.lowercase() ?: "unknown",
-                        style = MaterialTheme.typography.labelSmall,
-                        color = MaterialTheme.colorScheme.primary.copy(alpha = 0.7f),
-                        modifier = Modifier.padding(bottom = 2.dp)
-                    )
-                }
+
                 Text(
                     text = message.text,
                     style = MaterialTheme.typography.bodyLarge,
@@ -403,10 +399,11 @@ fun MessageBubble(message: Message, currentUserId: Int?) {
                 )
             }
         }
+
         Text(
-            text = time,
-            style = MaterialTheme.typography.labelSmall,
-            color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.3f),
+            text = if (!isMe) message.display_name.lowercase() + " . " + time else time,
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
             modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp)
         )
     }

android/app/src/main/java/dev/zxq5/chatapp/android/feature/settings/SettingsViewModel.kt

@@ -2,6 +2,7 @@ package dev.zxq5.chatapp.android.feature.settings
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import dev.zxq5.chatapp.android.api.model.InviteRequest
 import dev.zxq5.chatapp.android.api.model.QrResponse
 import dev.zxq5.chatapp.android.core.error.ApiResult
 import dev.zxq5.chatapp.android.data.repository.SettingsRepository
@@ -27,6 +28,9 @@ class SettingsViewModel(private val settingsRepository: SettingsRepository) : Vi
     private val _isSuccessState = MutableStateFlow<Map<String, Boolean>>(emptyMap())
     val isSuccessState: StateFlow<Map<String, Boolean>> = _isSuccessState
 
+    private val _lastInviteCode = MutableStateFlow<String?>(null)
+    val lastInviteCode: StateFlow<String?> = _lastInviteCode
+
     fun clearMessages() {
         _settingsError.value = null
         _totpError.value = null
@@ -40,6 +44,20 @@ class SettingsViewModel(private val settingsRepository: SettingsRepository) : Vi
         }
     }
 
+    fun createInvite(request: InviteRequest) {
+        viewModelScope.launch {
+            _settingsError.value = null
+            when (val result = settingsRepository.createInvite(request)) {
+                is ApiResult.Success -> {
+                    _lastInviteCode.value = result.data
+                    triggerSuccess("invite")
+                }
+                is ApiResult.HttpError -> _settingsError.value = result.message
+                is ApiResult.NetworkError -> _settingsError.value = result.message
+            }
+        }
+    }
+
     fun fetchTotpStatus() {
         viewModelScope.launch {
             when (val result = settingsRepository.getTotpStatus()) {

android/app/src/main/java/dev/zxq5/chatapp/android/feature/settings/settings.kt

@@ -23,11 +23,14 @@ import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.ContentCopy
 import androidx.compose.material.icons.filled.KeyboardArrowDown
 import androidx.compose.material.icons.filled.KeyboardArrowUp
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.DatePicker
+import androidx.compose.material3.DatePickerDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
@@ -37,8 +40,10 @@ import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.OutlinedTextFieldDefaults
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.material3.rememberDatePickerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
@@ -57,9 +62,15 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import android.util.Base64
 import android.graphics.BitmapFactory
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.style.TextAlign
+import dev.zxq5.chatapp.android.api.model.InviteRequest
+import kotlin.time.Duration.Companion.days
+import kotlin.time.ExperimentalTime
+import kotlin.time.Instant
 
-@OptIn(ExperimentalMaterial3Api::class)
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalTime::class)
 @Composable
 fun SettingsScreen(
     viewModel: SettingsViewModel,
@@ -70,6 +81,7 @@ fun SettingsScreen(
     val settingsError by viewModel.settingsError.collectAsState()
     val isSuccessState by viewModel.isSuccessState.collectAsState()
     val totpError by viewModel.totpError.collectAsState()
+    val lastInviteCode by viewModel.lastInviteCode.collectAsState()
     
     LaunchedEffect(Unit) {
         viewModel.clearMessages()
@@ -274,6 +286,120 @@ fun SettingsScreen(
                 }
             }
 
+            SettingsSection(title = "invite") {
+                var inviteName by remember { mutableStateOf("") }
+                var maxUses by remember { mutableStateOf("1") }
+                val clipboardManager = LocalClipboardManager.current
+                
+                var showDatePicker by remember { mutableStateOf(false) }
+                val datePickerState = rememberDatePickerState(
+                    initialSelectedDateMillis = System.currentTimeMillis() + 7.days.inWholeMilliseconds
+                )
+
+                Text("create invite token", style = MaterialTheme.typography.bodyMedium, modifier = Modifier.padding(bottom = 8.dp))
+                
+                OutlinedTextField(
+                    value = inviteName,
+                    onValueChange = { inviteName = it },
+                    label = { Text("name") },
+                    modifier = Modifier.fillMaxWidth(),
+                    shape = RoundedCornerShape(8.dp)
+                )
+                Spacer(Modifier.height(8.dp))
+                OutlinedTextField(
+                    value = maxUses,
+                    onValueChange = { if (it.all { c -> c.isDigit() }) maxUses = it },
+                    label = { Text("max uses") },
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                    modifier = Modifier.fillMaxWidth(),
+                    shape = RoundedCornerShape(8.dp)
+                )
+                
+                Spacer(Modifier.height(8.dp))
+                
+                OutlinedTextField(
+                    value = datePickerState.selectedDateMillis?.let { Instant.fromEpochMilliseconds(it).toString().substringBefore("T") } ?: "",
+                    onValueChange = {},
+                    label = { Text("expiry date") },
+                    readOnly = true,
+                    trailingIcon = {
+                        IconButton(onClick = { showDatePicker = true }) {
+                            Icon(Icons.Default.KeyboardArrowDown, contentDescription = "Select Date")
+                        }
+                    },
+                    modifier = Modifier.fillMaxWidth().clickable { showDatePicker = true },
+                    shape = RoundedCornerShape(8.dp)
+                )
+                
+                if (showDatePicker) {
+                    DatePickerDialog(
+                        onDismissRequest = { showDatePicker = false },
+                        confirmButton = {
+                            TextButton(onClick = { showDatePicker = false }) {
+                                Text("ok")
+                            }
+                        }
+                    ) {
+                        DatePicker(state = datePickerState)
+                    }
+                }
+                
+                Spacer(Modifier.height(12.dp))
+                
+                SuccessButton(
+                    onClick = { 
+                        val nowMs = System.currentTimeMillis()
+                        val expiryMs = datePickerState.selectedDateMillis ?: (nowMs + 7.days.inWholeMilliseconds)
+                        viewModel.createInvite(
+                            InviteRequest(
+                                name = inviteName,
+                                max_uses = maxUses.toIntOrNull() ?: 1,
+                                start_date = Instant.fromEpochMilliseconds(nowMs),
+                                expiry_date = Instant.fromEpochMilliseconds(expiryMs)
+                            )
+                        )
+                    },
+                    label = "generate invite",
+                    isSuccess = isSuccessState["invite"] == true,
+                    enabled = inviteName.isNotBlank(),
+                    modifier = Modifier.fillMaxWidth()
+                )
+
+                if (lastInviteCode != null) {
+                    Spacer(Modifier.height(16.dp))
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .background(MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.3f), RoundedCornerShape(8.dp))
+                            .padding(12.dp),
+                        verticalAlignment = Alignment.CenterVertically,
+                        horizontalArrangement = Arrangement.SpaceBetween
+                    ) {
+                        Text(
+                            text = lastInviteCode!!,
+                            style = MaterialTheme.typography.bodyLarge,
+                            modifier = Modifier.weight(1f)
+                        )
+                        IconButton(onClick = { 
+                            clipboardManager.setText(AnnotatedString(lastInviteCode!!))
+                        }) {
+                            Icon(Icons.Default.ContentCopy, contentDescription = "Copy", modifier = Modifier.size(20.dp))
+                        }
+                    }
+                }
+            }
+
+            SettingsSection(title = "session") {
+                Button(
+                    onClick = onLogout,
+                    modifier = Modifier.fillMaxWidth(),
+                    shape = RoundedCornerShape(8.dp),
+                    colors = ButtonDefaults.buttonColors(containerColor = Color.White, contentColor = Color.Black)
+                ) {
+                    Text("logout")
+                }
+            }
+
             SettingsSection(title = "danger zone", color = Color.Red.copy(alpha = 0.7f)) {
                 var deletePassword by remember { mutableStateOf("") }
                 var deleteTotp by remember { mutableStateOf("") }
@@ -337,18 +463,6 @@ fun SettingsScreen(
                 }
             }
 
-            SettingsSection(title = "session") {
-                Spacer(Modifier.height(16.dp))
-                Button(
-                    onClick = onLogout,
-                    modifier = Modifier.fillMaxWidth(),
-                    shape = RoundedCornerShape(8.dp),
-                    colors = ButtonDefaults.buttonColors(containerColor = Color.White, contentColor = Color.Black)
-                ) {
-                    Text("logout")
-                }
-            }
-
             if (settingsError != null) {
                 Text(settingsError!!, color = Color.Red, style = MaterialTheme.typography.bodySmall, modifier = Modifier.padding(top = 8.dp))
             }
@@ -457,6 +571,7 @@ fun SuccessButton(
     }
 }
 
+@OptIn(ExperimentalTime::class)
 @Composable
 fun TwoFactorSetup(
     qrCodeBase64: String?,
@@ -511,15 +626,13 @@ fun TwoFactorSetup(
             Text(error.lowercase(), color = Color.Red, style = MaterialTheme.typography.labelSmall, modifier = Modifier.padding(top = 8.dp))
         }
         
-        Spacer(Modifier.height(24.dp))
-        
-        Button(
-            onClick = { if (code.length == 6) onConfirm(code) },
+        Spacer(Modifier.height(16.dp))
+        SuccessButton(
+            onClick = { onConfirm(code) },
+            label = "verify and enable",
+            isSuccess = false, // Managed by parent
             enabled = code.length == 6,
-            modifier = Modifier.fillMaxWidth(),
-            shape = RoundedCornerShape(8.dp)
-        ) {
-            Text("confirm code")
-        }
+            modifier = Modifier.fillMaxWidth()
+        )
     }
 }

android/app/src/main/java/dev/zxq5/chatapp/android/ui/components/textfield.kt

@@ -2,12 +2,14 @@ package dev.zxq5.chatapp.android.ui.components
 
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.OutlinedTextFieldDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 
@@ -31,6 +33,11 @@ fun TextField(
         modifier = Modifier.fillMaxWidth(),
         singleLine = true,
         textStyle = MaterialTheme.typography.bodyLarge,
+        keyboardOptions = if (isPassword) {
+            KeyboardOptions(keyboardType = KeyboardType.Password)
+        } else {
+            KeyboardOptions.Default
+        },
         visualTransformation = if (isPassword) PasswordVisualTransformation() else androidx.compose.ui.text.input.VisualTransformation.None,
         shape = RoundedCornerShape(8.dp),
         colors = OutlinedTextFieldDefaults.colors(
@@ -40,6 +47,6 @@ fun TextField(
             unfocusedBorderColor = MaterialTheme.colorScheme.outline,
             focusedTextColor = MaterialTheme.colorScheme.onSurface,
             unfocusedTextColor = MaterialTheme.colorScheme.onSurface
-        )
+        ),
     )
 }

android/app/src/main/java/dev/zxq5/chatapp/android/ui/theme/Color.kt

@@ -2,7 +2,7 @@ package dev.zxq5.chatapp.android.ui.theme
 
 import androidx.compose.ui.graphics.Color
 
-val Black = Color(0xFF0A0A0A)
+val Black = Color(0xFF000000)
 val DarkGrey = Color(0xFF0D0D0D)
 val Grey = Color(0xFF141414)
 val LightGrey = Color(0xFF1E1E1E)

backend/.idea/GitLink.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="uk.co.ben_gibson.git.link.SettingsState">
+    <option name="host" value="e0f86390-1091-4871-8aeb-f534fbc99cf0" />
+  </component>
+</project>

backend/.idea/data_source_mapping.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="DataSourcePerFileMappings">
-    <file url="file://$PROJECT_DIR$/sql/schema.sql" value="b14acf5d-6750-469b-8aea-59c8343eb11c" />
+    <file url="file://$PROJECT_DIR$/sql/test.sql" value="b14acf5d-6750-469b-8aea-59c8343eb11c" />
     <file url="file://$PROJECT_DIR$/src/repo/user_repo.rs" value="b14acf5d-6750-469b-8aea-59c8343eb11c" />
   </component>
 </project>

backend/.idea/sqldialects.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="SqlDialectMappings">
-    <file url="file://$PROJECT_DIR$/sql/schema.sql" dialect="PostgreSQL" />
+    <file url="file://$PROJECT_DIR$/migrations/20260412200102_message_id_to_uuid.sql" dialect="PostgreSQL" />
+    <file url="file://$PROJECT_DIR$/sql/test.sql" dialect="PostgreSQL" />
     <file url="PROJECT" dialect="PostgreSQL" />
   </component>
 </project>

backend/Cargo.toml

@@ -12,7 +12,7 @@ image = "0.25.8"
 jsonwebtoken = { version = "10.3.0", features = ["rust_crypto"] }
 rand = "0.8"
 redis = { version = "0.25.4", features = ["tokio-comp"] }
-reqwest = { version = "0.12.23", features = ["json"] }
+reqwest = { version = "0.12.23", features = ["json", "stream"] }
 rocket = { version = "0.5.1", features = ["json", "secrets"] }
 rocket_cors = "0.6.0"
 rocket_db_pools = { version = "0.2.0", features = ["deadpool_redis", "sqlx_macros", "sqlx_postgres"] }
@@ -20,11 +20,11 @@ rocket_dyn_templates = { version = "0.2.0", features = ["tera"] }
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.145"
 sha2 = "0.10.9"
-sqlx = { version = "0.7.4", features = ["chrono", "macros", "postgres", "time"] }
+sqlx = { version = "0.7.4", features = ["chrono", "macros", "postgres", "time", "uuid"] }
 tokio = { version = "1.47.1", features = ["full"] }
 totp-rs = { version = "5.7.0", features = ["gen_secret", "qr", "rand"] }
 tracing = "0.1.44"
-uuid = { version = "1.18.1", features = ["v4"] }
+uuid = { version = "1.18.1", features = ["serde", "v4"] }
 thiserror = "1.0.69"
 utoipa = { version = "5.4.0", features = ["rocket_extras", "chrono"] }
 clap = { version = "4.5", features = ["derive"] }

backend/Rocket.toml

@@ -1,7 +1,7 @@
 [debug]
 secret_key = "yYhvCGnRh/TrcHtB8sZqCFifrVmJxoKFLBYw/WWBZeU="
 address = "0.0.0.0"
-port = 8000
+port = 8080
 
 [debug.databases.postgres_db]
 url = "postgresql://chatapp:chatapp@100.118.108.58:5432/chatapp_dev"

backend/migrations/20260412200102_message_id_to_uuid.sql

@@ -0,0 +1,9 @@
+ALTER TABLE attachments DROP CONSTRAINT attachments_message_id_fkey;
+
+ALTER TABLE messages ALTER COLUMN id DROP DEFAULT;
+ALTER TABLE messages ALTER COLUMN id TYPE uuid USING gen_random_uuid();
+ALTER TABLE messages ALTER COLUMN id SET DEFAULT gen_random_uuid();
+
+ALTER TABLE attachments ALTER COLUMN message_id TYPE uuid USING gen_random_uuid();
+ALTER TABLE attachments ADD CONSTRAINT attachments_message_id_fkey
+    FOREIGN KEY (message_id) REFERENCES messages(id) ON DELETE CASCADE;

backend/sql/test.sql

@@ -0,0 +1,17 @@
+WITH space1 AS (
+    INSERT INTO spaces (name, description, owner_id)
+        VALUES ('general', 'Boring chat idk', 1)
+        RETURNING id
+),
+     space2 AS (
+         INSERT INTO spaces (name, description, owner_id)
+             VALUES ('Gaming', 'we lose games', 1)
+             RETURNING id
+     )
+INSERT INTO channels (name, description, space_id)
+SELECT 'General',     'General chat',        id FROM space1 UNION ALL
+SELECT 'Coding',      'Coding stuff',       id FROM space1 UNION ALL
+SELECT 'AI',          '"/ask" here pls :)', id FROM space1 UNION ALL
+SELECT 'The Game',    '(You lost)',       id FROM space2 UNION ALL
+SELECT 'Backrooms',        'Beware of Smilers',           id FROM space2 UNION ALL
+SELECT 'SE',        'Space/Software engineering.',          id FROM space2;

backend/src/api/chat.rs

@@ -9,15 +9,7 @@ use rocket::{Shutdown, State, ___internal_EventStream as EventStream};
 use sqlx::FromRow;
 use tokio::select;
 use tokio::sync::broadcast;
-
-/// ---------- Rocket routes ----------
-#[derive(Debug, Serialize, Deserialize, Clone, FromRow)]
-pub struct ChatMsg {
-    pub display_name: Option<String>,
-    pub user_id: i64,
-    pub text: String,
-    pub timestamp: DateTime<Utc>,
-}
+use crate::model::event::{ChatEvent, ChatMsg};
 
 #[post("/chat/<channel_id>", format = "json", data = "<msg>")]
 pub async fn post_message(
@@ -36,24 +28,25 @@ pub async fn event_stream(
     mut shutdown: Shutdown,
     channel_id: i64,
 ) -> ApiResult<EventStream![]> {
-    let messages = chat.get_messages(channel_id, 100)
+    let messages = chat.fetch_latest_messages_desc(channel_id, 100)
         .await?; // if get message returned err, inform user.
 
     let mut rx = chat.subscribe(channel_id).await;
     let id = s.uid;
 
     Ok(EventStream! {
-        for msg in messages {
-            yield Event::json(&msg);
+        for msg in messages.into_iter().rev() {
+            // tracing::info!("sending: {:?}", serde_json::to_string(&ChatEvent::SendMessage(msg.clone())).unwrap());
+            yield Event::json(&ChatEvent::SendMessage(msg));
         }
 
         loop {
             select!{
                 _ = &mut shutdown => break, // exit early on shutdown
-                msg = rx.recv() => match msg {
-                    Ok(msg) => {
-                        tracing::info!("yielding message!");
-                        yield Event::json(&msg)
+                event = rx.recv() => match event {
+                    Ok(event) => {
+                        // tracing::info!("yielding event: {event:?}");
+                        yield Event::json(&event)
                     },
                     Err(broadcast::error::RecvError::Lagged(n)) => {
                         tracing::warn!("Receiver lagging on channel {channel_id} by {n} events",);

backend/src/model/event.rs

@@ -0,0 +1,27 @@
+use rocket::serde::{Deserialize, Serialize};
+use sqlx::FromRow;
+use chrono::{DateTime, Utc};
+use uuid::Uuid;
+
+/// ---------- Rocket routes ----------
+#[derive(Debug, Serialize, Deserialize, Clone, FromRow)]
+pub struct ChatMsg {
+    pub id: Uuid,
+    pub display_name: Option<String>,
+    pub user_id: i64,
+    pub text: String,
+    pub timestamp: DateTime<Utc>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", content = "data")]
+pub enum ChatEvent {
+    SendMessage(ChatMsg),
+
+    /// for when a user explicitly edits a message
+    EditMessage { id: Uuid, msg: ChatMsg },
+
+    /// used for streaming content to a message
+    /// will not show up as edited
+    MessageAppendContent{ id: Uuid, content: String }
+}

backend/src/model/mod.rs

@@ -1,3 +1,4 @@
 pub mod auth;
 pub mod user;
-pub mod space;
+pub mod space;
+pub mod event;

backend/src/repo/message_repo.rs

@@ -1,68 +1,80 @@
-use crate::api::chat::ChatMsg;
+use crate::model::event::ChatMsg;
 use crate::repo::Repo;
 use chrono::{DateTime, Utc};
 use sqlx::PgPool;
+use uuid::Uuid;
 
 #[derive(Clone)]
 pub struct MessageRepository {
 	pool: PgPool
 }
 
-impl Repo for MessageRepository {
-	type Target = ChatMsg;
-
-	fn new(pool: PgPool) -> Self {
+impl MessageRepository {
+	pub(crate) fn new(pool: PgPool) -> Self {
 		Self { pool }
 	}
 
 	// TODO: caching with redis
-	async fn get_by_id(&self, id: i64) -> Option<Self::Target> {
+	async fn get_by_id(&self, id: Uuid) -> Option<ChatMsg> {
 		sqlx::query!(
-			"SELECT u.username, u.nickname, u.id as user_id, m.content, m.created_at
+			"SELECT m.id, u.username, u.nickname, u.id as user_id, m.content, m.created_at
             FROM messages m
             JOIN users u ON m.user_id = u.id
             WHERE m.id = $1",
 		   	id
 		).fetch_optional(&self.pool).await.ok().flatten().map(|row| ChatMsg {
-				display_name: Some(row.nickname.unwrap_or(row.username)),
-				user_id: row.user_id,
-				text: row.content,
-				timestamp: row.created_at,
-			})
+			id: row.id,
+			display_name: Some(row.nickname.unwrap_or(row.username)),
+			user_id: row.user_id,
+			text: row.content,
+			timestamp: row.created_at,
+		})
 	}
-}
 
-impl MessageRepository {
 
 	// TODO! caching with redis
 	pub async fn create_new(
-		&self, uid: i64, channel_id: i64,
-		text: &str, created_at: DateTime<Utc>
-	) -> Result<i64, sqlx::Error> {
+		&self, msg: ChatMsg, channel_id: i64
+	) -> Result<(), sqlx::Error> {
 		sqlx::query!(
-			"INSERT INTO messages (channel_id, user_id, content, created_at)
-			VALUES ($1, $2, $3, $4) RETURNING id",
+			"INSERT INTO messages (id, channel_id, user_id, content, created_at)
+			VALUES ($1, $2, $3, $4, $5)",
+			msg.id,
 			channel_id,
-			uid,
+			msg.user_id,
+			msg.text,
+			msg.timestamp
+		).execute(&self.pool).await.map_err(|_| sqlx::Error::RowNotFound)?;
+		Ok(())
+	}
+
+	pub async fn update_text(&self, id: Uuid, text: &str) -> Result<(), sqlx::Error> {
+		sqlx::query!(
+			"UPDATE messages SET content = $1 WHERE id = $2",
 			text,
-			created_at
-		).fetch_optional(&self.pool).await.and_then(|row| row.map(|r| r.id).ok_or(sqlx::Error::RowNotFound))
+			id
+		).execute(&self.pool).await?;
+		Ok(())
 	}
 
 	/// TODO: caching with redis
-	pub async fn get_by_channel(&self, channel_id: i64, limit: usize)
-		-> Result<Vec<ChatMsg>, sqlx::Error> {
+	pub async fn get_latest_by_channel_desc(
+		&self, channel_id: i64, limit: usize, page: usize
+	) -> Result<Vec<ChatMsg>, sqlx::Error> {
 		sqlx::query!(
-			"SELECT u.username, u.nickname, u.id as user_id, m.content, m.created_at
+			"SELECT m.id, u.username, u.nickname, u.id as user_id, m.content, m.created_at
             FROM messages m
             JOIN users u ON m.user_id = u.id
             WHERE m.channel_id = $1
-            ORDER BY m.created_at DESC LIMIT $2",
+            ORDER BY m.created_at DESC
+            LIMIT $2 OFFSET $3",
 			channel_id,
-			limit as i64
+			limit as i64,
+			page as i64
 		).fetch_all(&self.pool).await.map(|messages| {
-			messages.into_iter().rev().map(|msg| {
+			messages.into_iter().map(|msg| {
 				ChatMsg {
+					id: msg.id,
 					display_name: Some(msg.nickname.unwrap_or(msg.username)),
 					user_id: msg.user_id,
 					text: msg.content,

backend/src/svc/chat_svc.rs

@@ -1,12 +1,15 @@
-use crate::api::chat::ChatMsg;
+use crate::model::event::{ChatEvent, ChatMsg};
 use crate::error::{ApiResult, AppError};
 use crate::repo::message_repo::MessageRepository;
 use crate::repo::{ChannelRepo, Repo, SpaceRepo, UserRepo};
 use chrono::{DateTime, Utc};
-use std::collections::HashMap;
+use std::collections::{HashMap, VecDeque};
 use std::sync::Arc;
+use std::sync::mpsc::channel;
+use std::time::Instant;
 use tokio::sync::broadcast::Sender;
 use tokio::sync::{broadcast, Mutex};
+use uuid::Uuid;
 use crate::model::space::SpaceDto;
 use crate::svc::llm_service::LlmService;
 
@@ -15,15 +18,13 @@ use crate::svc::llm_service::LlmService;
 #[derive(Clone)]
 pub struct ChatService {
     users: Arc<dyn UserRepo>,
-    channels: Arc<dyn ChannelRepo>,
+    channel_repo: Arc<dyn ChannelRepo>,
     spaces: Arc<dyn SpaceRepo>,
     messages: MessageRepository,
 
     llm: LlmService,
     buffer_size: usize,
-    senders: Arc<Mutex<HashMap<i64, Sender<ChatMsg>>>>,
-
-
+    channels: Arc<Mutex<HashMap<i64, ChannelState>>>,
 }
 
 impl ChatService {
@@ -33,13 +34,13 @@ impl ChatService {
         channels: Arc<dyn ChannelRepo>, spaces: Arc<dyn SpaceRepo>,
     ) -> Self {
         Self {
-            channels,
+            channel_repo: channels,
             spaces,
             llm,
             users,
             messages,
             buffer_size,
-            senders: Arc::new(Mutex::new(std::collections::HashMap::new())),
+            channels: Arc::new(Mutex::new(std::collections::HashMap::new())),
         }
     }
 
@@ -50,7 +51,7 @@ impl ChatService {
 
         let mut result = Vec::new();
         for space in spaces {
-            let channels = self.channels.get_by_space_id(space.id).await?;
+            let channels = self.channel_repo.get_by_space_id(space.id).await?;
             result.push(SpaceDto {
                 channels,
                 id: space.id,
@@ -65,8 +66,10 @@ impl ChatService {
         Ok(result)
     }
 
-    pub async fn get_messages(&self, channel_id: i64, limit: usize) -> ApiResult<Vec<ChatMsg>> {
-        let messages = self.messages.get_by_channel(channel_id, limit).await?;
+    pub async fn fetch_latest_messages_desc(&self, channel_id: i64, limit: usize) -> ApiResult<Vec<ChatMsg>> {
+        const PAGE: usize = 0;
+
+        let messages = self.messages.get_latest_by_channel_desc(channel_id, limit, PAGE).await?;
         Ok(messages)
     }
 
@@ -113,6 +116,7 @@ impl ChatService {
             .ok_or(AppError::NotFound)?;
 
         let message = ChatMsg {
+            id: Uuid::new_v4(),
             display_name: Some(user
                 .nickname.clone()
                 .unwrap_or_else(|| user.username.clone())),
@@ -122,66 +126,124 @@ impl ChatService {
         };
 
         self.publish(channel_id, message.clone()).await;
-
-        let _msg_id = self.messages.create_new(uid, channel_id, text, created_at).await?;
+        self.messages.create_new(message.clone(), channel_id).await?;
         // TODO: caching w redis at repository layer
 
-        let svc_instance = self.clone();
-
-        let Some(text) = text.strip_prefix("/ask ") else {
-            return Ok(())
-        };
-
-        if !svc_instance.llm.enabled() {
-            return Ok(())
+        if !message.text.starts_with("/ask ") {
+            return Ok(());
         }
 
+
+        let svc_instance = self.clone();
+        if !svc_instance.llm.enabled() {
+            return Ok(());
+        }
+
+        let context = self.get_history(channel_id, 25).await?;
         tokio::spawn(async move {
+            let sender = match svc_instance.channels.lock().await.get(&channel_id) {
+                Some(s) => s.get_sender(),
+                None => return,
+            };
+
             let response = svc_instance.llm
-                .query(&message)
+                .query(&message, &context, sender)
                 .await;
 
-            if let Ok(reply) = response {
-
-                tracing::info!("LLM reply: {}", reply.text);
-
-                svc_instance.publish(channel_id, reply.clone()).await;
-                // TODO: cache response (or do with redis!)
-                if let Err(e) = svc_instance.messages
-                    .create_new(reply.user_id, channel_id, &reply.text, reply.timestamp).await {
-                    tracing::error!("Failed to persist LLM reply: {}", e);
-                }
-
-                tracing::info!("LLM reply persisted");
-
-            } else {
+            let Ok(reply) = response else {
                 tracing::warn!("Error contacting LLM: {:?}", response);
+                return;
+            };
+
+            // TODO: cache response (or do with redis!)
+            if let Err(e) = svc_instance.messages.create_new(reply, channel_id).await {
+                tracing::error!("Failed to persist LLM reply: {}", e);
             }
+
+            tracing::debug!("Full LLM reply persisted");
         });
 
         Ok(())
     }
 
+    async fn get_history(&self, channel_id: i64, limit: usize) -> ApiResult<Vec<ChatMsg>> {
+        let mut map = self.channels.lock().await;
+        if let Some(channel) = map.get(&channel_id) && !channel.cache.is_empty() {
+            Ok(channel.history().clone().into_iter().take(limit).collect())
+        } else {
+            let messages: Vec<_> = self.messages.get_latest_by_channel_desc(channel_id, limit, 0).await?.into_iter().rev().collect();
+            map.insert(channel_id,
+                       ChannelState::new(self.buffer_size, Some(messages.clone().into()))
+            );
+            Ok(messages)
+        }
+    }
+
     /// Subscribe to the specified channel.
-    pub async fn subscribe(&self, channel_id: i64) -> broadcast::Receiver<ChatMsg> {
-        let mut map = self.senders.lock().await;
-        let sender = map
+    pub async fn subscribe(&self, channel_id: i64) -> broadcast::Receiver<ChatEvent> {
+        let mut map = self.channels.lock().await;
+        let channel = map
             .entry(channel_id)
-            .or_insert_with(|| broadcast::channel::<ChatMsg>(self.buffer_size).0);
-        sender.subscribe()
+            .or_insert_with(|| ChannelState::new(self.buffer_size, None));
+        channel.subscribe()
     }
 
     // Private helper methods
 
     /// Publish a message to the specified channel.
     async fn publish(&self, channel_id: i64, msg: ChatMsg) {
-        let mut map = self.senders.lock().await;
-        let sender = map
+        let mut map = self.channels.lock().await;
+        let channel = map
             .entry(channel_id)
-            .or_insert_with(|| broadcast::channel::<ChatMsg>(self.buffer_size).0);
-        let _ = sender.send(msg);
+            .or_insert_with(|| ChannelState::new(self.buffer_size, None));
+        channel.send(msg);
+    }
+}
+
+#[derive(Clone)]
+pub struct ChannelState {
+    sender: Sender<ChatEvent>,
+    cache: VecDeque<ChatMsg>,
+    last_updated: Instant,
+}
+
+impl ChannelState {
+
+    const MAX_HISTORY_SIZE: usize = 100;
+
+    #[must_use]
+    pub fn new(buffer_size: usize, history: Option<VecDeque<ChatMsg>>) -> Self {
+        Self {
+            sender: broadcast::channel(buffer_size).0,
+            cache: history.unwrap_or_default(),
+            last_updated: Instant::now(),
+        }
     }
 
+    pub fn history(&self) -> &VecDeque<ChatMsg> {
+        &self.cache
+    }
 
+    pub fn get_sender(&self) -> Sender<ChatEvent> {
+        self.sender.clone()
+    }
+
+    #[must_use]
+    pub fn send(&mut self, msg: ChatMsg) {
+        while self.cache.len() >= Self::MAX_HISTORY_SIZE {
+            self.cache.pop_front();
+        }
+
+        self.cache.push_back(msg.clone());
+
+        if self.sender.send(ChatEvent::SendMessage(msg)).is_err() {
+            tracing::warn!("Sent message to channel with no subscribers");
+        }
+    }
+
+    #[must_use]
+    pub fn subscribe(&self) -> broadcast::Receiver<ChatEvent> {
+        self.sender.subscribe()
+    }
+}
 
-}

backend/src/svc/llm_service.rs

@@ -1,3 +1,13 @@
+use std::env;
+use std::sync::LazyLock;
+use futures_util::StreamExt;
+use serde::{Deserialize, Serialize};
+use tokio::sync::broadcast::Sender;
+use uuid::Uuid;
+use crate::model::event::{ChatEvent, ChatMsg};
+use crate::error::{ApiResult, AppError};
+
+
 #[derive(Clone)]
 pub struct LlmService;
 
@@ -15,71 +25,139 @@ impl LlmService {
 		LMSTUDIO_URL.is_some()
 	}
 
-	pub async fn query(&self, message: &ChatMsg) -> ApiResult<ChatMsg> {
+	pub async fn query(&self, message: &ChatMsg, context: &[ChatMsg], sender: Sender<ChatEvent>) -> ApiResult<ChatMsg> {
 		let Some(url) = LMSTUDIO_URL.clone() else {
 			return Err(AppError::internal("AI not enabled!"))
 		};
 
-		let model = LMSTUDIO_MODEL.clone().unwrap_or_else(|| "gpt-oss-20b".into());
-
-		let client = reqwest::Client::new();
-
-		// Build the request body
-		let payload = LlmRequest {
-			model, // whatever model you run locally
-			messages: vec![Message {
-				role: "user".into(),
-				content: message.text.clone(),
-			}],
+		let reply_id = Uuid::new_v4();
+		let timestamp = chrono::Utc::now();
+		let mut reply = ChatMsg {
+			id: reply_id,
+			display_name: Some("llm".into()),
+			user_id: 0,
+			text: String::new(),
+			timestamp,
 		};
+		let _ = sender.send(ChatEvent::SendMessage(reply.clone()));
 
-		// POST to lm‑studio (default 127.0.0.1:1234)
-		let resp = client
+		let mut messages: Vec<Message> = Vec::new();
+		let system_prompt = format!(
+			"You are a helpful assistant in a group chat. \
+			 You are talking to '{}'. \
+			 Keep responses concise and conversational.",
+			message.display_name.as_deref().unwrap_or("unknown"),
+		);
+		messages.push(Message { role: "system".into(), content: system_prompt });
+
+		for msg in context {
+			let role = if msg.user_id == 0 {
+				"assistant"  // your LLM user_id convention
+			} else {
+				"user"
+			};
+			messages.push(Message {
+				role: role.into(),
+				content: format!(
+					"{}: {}",
+					msg.display_name.as_deref().unwrap_or("unknown"),
+					msg.text
+				),
+			});
+		}
+
+		messages.push(Message {
+			role: "user".into(),
+			content: format!(
+				"{}: {}",
+				message.display_name.as_deref().unwrap_or("unknown"),
+				message.text.trim_start_matches("/ask ")  // strip the command prefix
+			),
+		});
+
+		let Ok(resp) = reqwest::Client::new()
 			.post(url)
-			.json(&payload)
+			.json(&LlmRequest {
+				think: false,
+				model: LMSTUDIO_MODEL
+					.clone()
+					.unwrap_or_else(|| "gpt-oss-20b".into()),
+				messages,
+				stream: true,
+			})
 			.send()
 			.await
-			.map_err(|_| AppError::internal("Failed to make request to LLM server"))?;
+		else {
+			tracing::warn!("Failed to reach LLM");
+			let _ = sender.send(ChatEvent::MessageAppendContent {
+				id: reply_id,
+				content: String::from("I'm not available right now. Please try again later.")
+			});
+			return Err(AppError::internal("Failed to reach LLM"));
+		};
 
-		// The API returns a JSON with `choices[].message.content`
-		#[derive(Deserialize)]
-		struct LlmResponse {
-			choices: Vec<Choice>,
-		}
-		#[derive(Deserialize)]
-		struct Choice {
-			message: Message,
+
+		let mut full_text = String::new();
+		let mut buffer = String::new();
+		let mut stream = resp.bytes_stream();
+
+		while let Some(chunk) = stream.next().await {
+			let chunk = chunk.map_err(|_| AppError::internal("Stream error"))?;
+			buffer.push_str(&String::from_utf8_lossy(&chunk));
+
+			while let Some(pos) = buffer.find('\n') {
+				let line = buffer[..pos].trim().to_string();
+				buffer = buffer[pos + 1..].to_string();
+
+				if line == "data: [DONE]" {
+					break;
+				}
+
+				if let Some(json) = line.strip_prefix("data: ")
+					&& let Ok(parsed) = serde_json::from_str::<StreamingResponse>(json)
+					&& let Some(content) = parsed.choices[0].delta.content.as_ref() {
+						full_text.push_str(content);
+						let _ = sender.send(ChatEvent::MessageAppendContent {
+							id: reply_id,
+							content: content.clone(),
+						});
+					}
+			}
 		}
 
-		let llm_resp: LlmResponse = resp
-			.json()
-			.await
-			.map_err(|_| AppError::internal("Failed to parse LLM response"))?;
+		reply.text = full_text;
 
-		Ok(ChatMsg {
-			display_name: Some(String::from("llm")),
-			user_id: 0,
-			text: llm_resp.choices[0].message.content.clone(),
-			timestamp: chrono::Utc::now(),
-		})
+		Ok(reply)
 	}
 }
 
-use std::env;
-use std::sync::LazyLock;
-// src/llm.rs
-use serde::{Deserialize, Serialize};
 
-use crate::api::chat::ChatMsg;
-use crate::error::{ApiResult, AppError};
-use crate::svc::chat_svc::ChatService;
 
 #[derive(Serialize)]
 struct LlmRequest {
 	model: String,
 	messages: Vec<Message>,
+	stream: bool,
+	think: bool,
 }
 
+#[derive(Deserialize)]
+struct StreamingResponse {
+	choices: Vec<StreamingChoice>,
+}
+
+#[derive(Deserialize)]
+struct StreamingChoice {
+	delta: Delta,
+	#[serde(default)]
+	finish_reason: Option<String>,
+}
+
+#[derive(Deserialize)]
+struct Delta {
+	#[serde(default)]
+	content: Option<String>,
+}
 #[derive(Serialize, Deserialize)]
 struct Message {
 	role: String, // "user" or "assistant"

backend/src/svc/mod.rs

@@ -3,4 +3,5 @@ pub mod chat_svc;
 pub mod settings_svc;
 pub mod user_svc;
 pub mod access_token_svc;
-pub mod llm_service;
+pub mod llm_service;
+pub mod relationship_svc;

backend/src/svc/relationship_svc.rs

@@ -0,0 +1,6 @@
+pub struct RelationshipService {}
+
+impl RelationshipService {
+	pub fn new() -> Self { Self {} }
+}
+

backend/tests/chat_test.py

@@ -0,0 +1,228 @@
+import argparse
+import json
+import threading
+import time
+from dataclasses import dataclass
+from getpass import getpass
+from typing import List
+
+import requests
+
+
+BASE_URL = "http://localhost:8000"
+
+
+@dataclass
+class AuthResult:
+    token: str
+
+
+def signup(session: requests.Session, email: str, username: str, password: str, access_token: str) -> None:
+    url = f"{BASE_URL}/api/signup"
+    payload = {
+        "email": email,
+        "username": username,
+        "password": password,
+        "access_token": access_token,
+    }
+    resp = session.post(url, json=payload, timeout=10)
+    resp.raise_for_status()
+
+
+def login(session: requests.Session, username: str, password: str) -> AuthResult:
+    url = f"{BASE_URL}/api/login"
+    payload = {
+        "username": username,
+        "password": password,
+    }
+    resp = session.post(url, json=payload, timeout=10)
+    resp.raise_for_status()
+
+    data = resp.json()
+    token = data.get("token")
+    if not token:
+        raise RuntimeError(f"Login response did not contain token: {data}")
+    return AuthResult(token=token)
+
+
+def post_message(session: requests.Session, channel_id: int, token: str, text: str, display_name: str, user_id: int) -> None:
+    url = f"{BASE_URL}/api/chat/{channel_id}"
+    payload = {
+        "display_name": display_name,
+        "user_id": user_id,
+        "text": text,
+        "timestamp": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime()),
+    }
+    headers = {"Authorization": f"Bearer {token}"}
+    resp = session.post(url, json=payload, headers=headers, timeout=10)
+    resp.raise_for_status()
+
+
+def read_sse_messages(
+        session: requests.Session,
+        channel_id: int,
+        token: str,
+        expected_count: int,
+        timeout_s: int,
+        capture_live_messages: threading.Event,
+) -> List[dict]:
+    url = f"{BASE_URL}/api/events/{channel_id}"
+    headers = {
+        "Authorization": f"Bearer {token}",
+        "Accept": "text/event-stream",
+    }
+
+    received: List[dict] = []
+    deadline = time.monotonic() + timeout_s
+
+    try:
+        with session.get(url, headers=headers, stream=True, timeout=(5, timeout_s)) as resp:
+            resp.raise_for_status()
+
+            event_data_lines: List[str] = []
+
+            for raw_line in resp.iter_lines(decode_unicode=True):
+                if time.monotonic() > deadline:
+                    break
+
+                if raw_line is None:
+                    continue
+
+                line = raw_line.strip()
+
+                if not line:
+                    if event_data_lines:
+                        joined = "\n".join(event_data_lines)
+                        event_data_lines.clear()
+                        try:
+                            obj = json.loads(joined)
+                        except json.JSONDecodeError:
+                            continue
+
+                        if capture_live_messages.is_set():
+                            received.append(obj)
+                            if expected_count > 0 and len(received) >= expected_count:
+                                break
+                        else:
+                            print(f"Discarding message: {obj}")
+                    continue
+
+                if line.startswith("data:"):
+                    event_data_lines.append(line[len("data:"):].strip())
+
+    except requests.exceptions.Timeout:
+        print("Timeout while reading SSE.")
+    except requests.exceptions.RequestException as exc:
+        print(f"Error reading SSE: {exc}")
+
+    return received
+
+
+def prompt_nonempty(label: str, secret: bool = False) -> str:
+    while True:
+        value = getpass(label) if secret else input(label)
+        value = value.strip()
+        if value:
+            return value
+        print("Please enter a value.")
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="Chat integration test against localhost:8000")
+    parser.add_argument("--existing-account", action="store_true",
+                        help="Skip signup and only log in with an existing account")
+    parser.add_argument("--email", default=None)
+    parser.add_argument("--username", default=None)
+    parser.add_argument("--password", default=None)
+    parser.add_argument("--access-token", default=None,
+                        help="Required only for signup mode")
+    parser.add_argument("--channel-id", type=int, default=1)
+    parser.add_argument("--message-count", type=int, default=5)
+    parser.add_argument("--timeout", type=int, default=15)
+    args = parser.parse_args()
+
+    session = requests.Session()
+
+    if args.existing_account:
+        username = args.username or prompt_nonempty("Username: ")
+        password = args.password or prompt_nonempty("Password: ", secret=True)
+    else:
+        email = args.email or prompt_nonempty("Email: ")
+        username = args.username or prompt_nonempty("Username: ")
+        password = args.password or prompt_nonempty("Password: ", secret=True)
+        access_token = args.access_token or prompt_nonempty("Access token: ")
+
+        print("[1/5] Signing up...")
+        try:
+            signup(session, email, username, password, access_token)
+            print("  signup ok")
+        except requests.HTTPError as e:
+            print(f"  signup returned HTTP error: {e}")
+            print("  continuing to login...")
+
+    print("[2/5] Logging in...")
+    auth = login(session, username, password)
+    print("  login ok")
+    print(f"  token: {auth.token[:12]}...")
+
+    print("[3/5] Opening event stream...")
+    received_messages: List[dict] = []
+    capture_live_messages = threading.Event()
+    stream_done = threading.Event()
+
+    def stream_reader() -> None:
+        nonlocal received_messages
+        try:
+            received_messages = read_sse_messages(
+                session=session,
+                channel_id=args.channel_id,
+                token=auth.token,
+                expected_count=args.message_count,
+                timeout_s=args.timeout,
+                capture_live_messages=capture_live_messages,
+            )
+        finally:
+            stream_done.set()
+
+    t = threading.Thread(target=stream_reader, daemon=True)
+    t.start()
+
+    # Give the server time to flush backlog on this same stream connection.
+    time.sleep(1.0)
+
+    print("[4/5] Starting to capture live messages and sending messages...")
+    capture_live_messages.set()
+
+    sent_texts = [f"Message {i}" for i in range(args.message_count)]
+    for i, text in enumerate(sent_texts):
+        post_message(
+            session=session,
+            channel_id=args.channel_id,
+            token=auth.token,
+            text=text,
+            display_name=username,
+            user_id=1,
+        )
+        print(f"  sent {i + 1}/{args.message_count}: {text}")
+        time.sleep(0.1)
+
+    stream_done.wait(timeout=args.timeout)
+    t.join(timeout=1)
+
+    print("\nReceived messages:")
+    for i, msg in enumerate(received_messages, start=1):
+        print(f"  {i}. {msg}")
+
+    received_texts = [m.get("text") for m in received_messages if isinstance(m, dict)]
+
+    for text in sent_texts:
+        if text not in received_texts:
+            print(f"\nFAIL: missing message: {text}")
+            return 1
+
+    print("\nPASS: login and message delivery test succeeded.")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())