Take into account the value of FeatureFlags.SignInWithClassic

features/login/impl/src/main/kotlin/io/element/android/features/login/impl/classic/ElementClassicConnection.kt

@@ -28,6 +28,8 @@ import io.element.android.libraries.androidutils.service.ServiceBinder
 import io.element.android.libraries.core.log.logger.LoggerTag
 import io.element.android.libraries.core.uri.ensureProtocol
 import io.element.android.libraries.di.annotations.AppCoroutineScope
+import io.element.android.libraries.featureflag.api.FeatureFlagService
+import io.element.android.libraries.featureflag.api.FeatureFlags
 import io.element.android.libraries.matrix.api.auth.ElementClassicSession
 import io.element.android.libraries.matrix.api.auth.HomeServerLoginCompatibilityChecker
 import io.element.android.libraries.matrix.api.auth.MatrixAuthenticationService
@@ -69,6 +71,7 @@ class DefaultElementClassicConnection(
     private val coroutineScope: CoroutineScope,
     private val matrixAuthenticationService: MatrixAuthenticationService,
     private val homeServerLoginCompatibilityChecker: HomeServerLoginCompatibilityChecker,
+    private val featureFlagService: FeatureFlagService,
 ) : ElementClassicConnection {
     // Messenger for communicating with the service.
     private var messenger: Messenger? = null
@@ -116,6 +119,10 @@ class DefaultElementClassicConnection(
     override fun start() {
         Timber.tag(loggerTag.value).d("start()")
         coroutineScope.launch {
+            if (!featureFlagService.isFeatureEnabled(FeatureFlags.SignInWithClassic)) {
+                Timber.tag(loggerTag.value).d("Login with Element Classic is disabled, not starting connection")
+                return@launch
+            }
             // Establish a connection with the service. We use an explicit
             // class name because there is no reason to be able to let other
             // applications replace our component.
@@ -151,6 +158,11 @@ class DefaultElementClassicConnection(
     override fun requestSession() {
         Timber.tag(loggerTag.value).d("requestSession()")
         coroutineScope.launch {
+            if (!featureFlagService.isFeatureEnabled(FeatureFlags.SignInWithClassic)) {
+                Timber.tag(loggerTag.value).d("Login with Element Classic is disabled")
+                emitState(ElementClassicConnectionState.Error("The feature is disabled"))
+                return@launch
+            }
             val finalMessenger = messenger
             if (finalMessenger == null) {
                 Timber.tag(loggerTag.value).d("The messenger is null, can't request data")

features/login/impl/src/test/kotlin/io/element/android/features/login/impl/classic/DefaultElementClassicConnectionTest.kt

@@ -15,6 +15,9 @@ import androidx.core.graphics.createBitmap
 import app.cash.turbine.test
 import com.google.common.truth.Truth.assertThat
 import io.element.android.libraries.androidutils.service.ServiceBinder
+import io.element.android.libraries.featureflag.api.FeatureFlagService
+import io.element.android.libraries.featureflag.api.FeatureFlags
+import io.element.android.libraries.featureflag.test.FakeFeatureFlagService
 import io.element.android.libraries.matrix.api.auth.ElementClassicSession
 import io.element.android.libraries.matrix.api.auth.HomeServerLoginCompatibilityChecker
 import io.element.android.libraries.matrix.api.auth.MatrixAuthenticationService
@@ -109,6 +112,21 @@ class DefaultElementClassicConnectionTest {
         }
     }
 
+    @Test
+    fun `requestSession when the feature is disabled emits an error`() = runTest {
+        val connection = createDefaultElementClassicConnection(
+            matrixAuthenticationService = FakeMatrixAuthenticationService(
+                setElementClassicSessionResult = {},
+            ),
+            isFeatureEnabled = false,
+        )
+        connection.stateFlow.test {
+            assertThat(awaitItem()).isEqualTo(ElementClassicConnectionState.Idle)
+            connection.requestSession()
+            assertThat(awaitItem()).isInstanceOf(ElementClassicConnectionState.Error::class.java)
+        }
+    }
+
     @Test
     fun `when an error is received, an error is emitted`() = runTest {
         val connection = createDefaultElementClassicConnection(
@@ -496,10 +514,17 @@ class DefaultElementClassicConnectionTest {
         homeServerLoginCompatibilityChecker: HomeServerLoginCompatibilityChecker = FakeHomeServerLoginCompatibilityChecker(
             checkResult = { Result.success(true) }
         ),
+        isFeatureEnabled: Boolean = true,
+        featureFlagService: FeatureFlagService = FakeFeatureFlagService(
+            initialState = mapOf(
+                FeatureFlags.SignInWithClassic.key to isFeatureEnabled,
+            )
+        ),
     ) = DefaultElementClassicConnection(
         serviceBinder = serviceBinder,
         coroutineScope = coroutineScope,
         matrixAuthenticationService = matrixAuthenticationService,
         homeServerLoginCompatibilityChecker = homeServerLoginCompatibilityChecker,
+        featureFlagService = featureFlagService,
     )
 }