Prevent race creating + clean up sensor entries for old/deleted servers (#4386)

- Prevent a race on logout from the frontend between updating the sensors and deleting the server data, causing stale sensor entries
 - During periodic sensor updates, clean up any orphaned sensor entries there might be (because of this bug or other race conditions we're unaware of)

app/src/main/java/io/homeassistant/companion/android/webview/WebViewActivity.kt

@@ -208,6 +208,7 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
     private var mFilePathCallback: ValueCallback<Array<Uri>>? = null
     private var isConnected = false
     private var isShowingError = false
+    private var isRelaunching = false
     private var alertDialog: AlertDialog? = null
     private var isVideoFullScreen = false
     private var videoHeight = 0
@@ -708,8 +709,7 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
                     @JavascriptInterface
                     fun revokeExternalAuth(callback: String) {
                         presenter.onRevokeExternalAuth(JSONObject(callback).get("callback") as String)
-                        relaunchApp()
-                        finish()
+                        isRelaunching = true // Prevent auth errors from showing
                     }
 
                     @JavascriptInterface
@@ -913,7 +913,7 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
     override fun onPause() {
         super.onPause()
         presenter.setAppActive(false)
-        if (!isFinishing) SensorReceiver.updateAllSensors(this)
+        if (!isFinishing && !isRelaunching) SensorReceiver.updateAllSensors(this)
     }
 
     private suspend fun checkAndWarnForDisabledLocation() {
@@ -1219,6 +1219,7 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
     }
 
     override fun relaunchApp() {
+        isRelaunching = true
         startActivity(Intent(this, LaunchActivity::class.java))
         finish()
     }
@@ -1284,7 +1285,7 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
         error: SslError?,
         description: String?
     ) {
-        if (isShowingError || !isStarted) {
+        if (isShowingError || !isStarted || isRelaunching) {
             return
         }
         isShowingError = true

common/src/main/java/io/homeassistant/companion/android/common/sensors/SensorWorkerBase.kt

@@ -66,6 +66,18 @@ abstract class SensorWorkerBase(
             }
             sensorReceiver.updateSensors(appContext, serverManager, sensorDao, null)
         }
+
+        // Cleanup orphaned sensors that may have been created by a slow or long running update
+        // writing data when deleting the server.
+        val currentServerIds = serverManager.defaultServers.map { it.id }
+        val orphanedSensors = sensorDao.getAllExceptServer(currentServerIds)
+        if (orphanedSensors.any()) {
+            Log.i(TAG, "Cleaning up ${orphanedSensors.size} orphaned sensor entries")
+            orphanedSensors.forEach {
+                sensorDao.removeSensor(it.id, it.serverId)
+            }
+        }
+
         Result.success()
     }
 

common/src/main/java/io/homeassistant/companion/android/database/sensor/SensorDao.kt

@@ -38,6 +38,9 @@ interface SensorDao {
     @Query("SELECT * FROM Sensors WHERE server_id = :serverId")
     suspend fun getAllServer(serverId: Int): List<Sensor>
 
+    @Query("SELECT * FROM Sensors WHERE NOT(server_id IN (:serverIds))")
+    suspend fun getAllExceptServer(serverIds: List<Int>): List<Sensor>
+
     @Transaction
     @Query("SELECT * FROM sensor_settings WHERE sensor_id = :id")
     fun getSettings(id: String): List<SensorSetting>