Fix WebSocket events being silently dropped on buffer overflow (#313)

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow `extraBufferCapacity` from 64 to 256
and changes the `onBufferOverflow` policy to `BufferOverflow.DROP_OLDEST`
in `HermesWsClient.kt`. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting `DROP_OLDEST`, `tryEmit()` remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix ktlint formatting issues in HermesWsClient.kt

The formatting changes adhere to ktlint rules required by the CI pipeline:
- Removed a trailing comma in MutableSharedFlow initialization to avoid multiline expression wrapping errors.
- Sorted imports to be in lexicographical order.

These formatting changes fix the failing CI check.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow `extraBufferCapacity` from 64 to 256
and changes the `onBufferOverflow` policy to `BufferOverflow.DROP_OLDEST`
in `HermesWsClient.kt`. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting `DROP_OLDEST`, `tryEmit()` remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

* Fix WebSocket events being silently dropped on buffer overflow

Increases the MutableSharedFlow extraBufferCapacity from 64 to 256
and changes the onBufferOverflow policy to BufferOverflow.DROP_OLDEST
in HermesWsClient.kt. This fixes an issue where the slow collection
(e.g., due to DB writes) caused the buffer to fill up and silently drop
incoming real-time WebSocket events.

By setting DROP_OLDEST, tryEmit() remains functional without
suspending, allowing real-time events to be retained and prioritized.

Fixes #275

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/data/local/AuthManager.kt

@@ -57,6 +57,10 @@ object AuthManager {
 
     private val _bottomNavDisplayModeFlow = MutableStateFlow<BottomNavDisplayMode>(BottomNavDisplayMode.ICON_AND_TEXT)
     val bottomNavDisplayModeFlow: StateFlow<BottomNavDisplayMode> = _bottomNavDisplayModeFlow.asStateFlow()
+
+    private val _tokenFlow = MutableStateFlow<String?>(null)
+    val tokenFlow: StateFlow<String?> = _tokenFlow.asStateFlow()
+
     private val gson = com.google.gson.Gson()
 
     /**
@@ -84,6 +88,7 @@ object AuthManager {
             _useDynamicColorsFlow.value = isUseDynamicColors()
             _themePresetFlow.value = getThemePreset()
             _bottomNavDisplayModeFlow.value = getBottomNavDisplayMode()
+            _tokenFlow.value = getToken()
         }
     }
 
@@ -103,6 +108,9 @@ object AuthManager {
                 >() {}.type
             gson.fromJson(json, type) ?: emptyList()
         } catch (e: Exception) {
+            if (com.m57.hermescontrol.BuildConfig.DEBUG) {
+                android.util.Log.w("AuthManager", "Failed to parse connection profiles", e)
+            }
             emptyList()
         }
     }
@@ -119,6 +127,9 @@ object AuthManager {
         token: String?,
     ) {
         requirePrefs().edit().putString("token_$profileId", token).apply()
+        if (getSelectedProfileId() == profileId) {
+            _tokenFlow.value = token
+        }
     }
 
     fun getSelectedProfileId(): String? {
@@ -128,6 +139,7 @@ object AuthManager {
 
     fun setSelectedProfileId(id: String?) {
         requirePrefs().edit().putString(KEY_SELECTED_PROFILE_ID, id).apply()
+        _tokenFlow.value = getToken()
     }
 
     // ── Token ────────────────────────────────────────────────────────────
@@ -135,8 +147,7 @@ object AuthManager {
     fun getToken(): String? {
         val selectedId = getSelectedProfileId()
         if (selectedId != null) {
-            val token = getProfileToken(selectedId)
-            if (token != null) return token
+            return getProfileToken(selectedId)
         }
         return requirePrefs().getString(KEY_TOKEN, null)
     }
@@ -147,6 +158,7 @@ object AuthManager {
             setProfileToken(selectedId, token)
         } else {
             requirePrefs().edit().putString(KEY_TOKEN, token).apply()
+            _tokenFlow.value = token
         }
     }
 

app/src/main/java/com/m57/hermescontrol/data/local/ChatMessageEntity.kt

@@ -12,7 +12,10 @@ import androidx.room.PrimaryKey
  * thread. The [timestamp] field preserves original ordering even if Room
  * reorders internally.
  */
-@Entity(tableName = "chat_messages")
+@Entity(
+    tableName = "chat_messages",
+    indices = [androidx.room.Index(value = ["session_id", "timestamp"])],
+)
 data class ChatMessageEntity(
     @PrimaryKey
     val id: String,

app/src/main/java/com/m57/hermescontrol/data/local/HermesDatabase.kt

@@ -4,11 +4,13 @@ import android.content.Context
 import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
 import com.m57.hermescontrol.BuildConfig
 
 @Database(
     entities = [ChatMessageEntity::class],
-    version = 1,
+    version = 2,
     exportSchema = true,
 )
 abstract class HermesDatabase : RoomDatabase() {
@@ -18,6 +20,16 @@ abstract class HermesDatabase : RoomDatabase() {
         @Volatile
         private var instance: HermesDatabase? = null
 
+        private val MIGRATION_1_2 =
+            object : Migration(1, 2) {
+                override fun migrate(db: SupportSQLiteDatabase) {
+                    db.execSQL(
+                        "CREATE INDEX IF NOT EXISTS `index_chat_messages_session_id_timestamp` " +
+                            "ON `chat_messages` (`session_id`, `timestamp`)",
+                    )
+                }
+            }
+
         fun get(context: Context): HermesDatabase =
             instance ?: synchronized(this) {
                 instance ?: Room
@@ -25,7 +37,8 @@ abstract class HermesDatabase : RoomDatabase() {
                         context.applicationContext,
                         HermesDatabase::class.java,
                         "hermes_control.db",
-                    ).apply {
+                    ).addMigrations(MIGRATION_1_2)
+                    .apply {
                         if (BuildConfig.DEBUG) {
                             fallbackToDestructiveMigration(false)
                         }