Pin unlock : hides behind feature flag (disabled by default)

appnav/src/main/kotlin/io/element/android/appnav/LoggedInFlowNode.kt

@@ -135,9 +135,9 @@ class LoggedInFlowNode @AssistedInject constructor(
                 }
             },
             onStop = {
-                pinStateDataSource.lock()
-                //Counterpart startSync is done in observeSyncStateAndNetworkStatus method.
                 coroutineScope.launch {
+                    pinStateDataSource.lock()
+                    //Counterpart startSync is done in observeSyncStateAndNetworkStatus method.
                     syncService.stopSync()
                 }
             },

features/pin/api/src/main/kotlin/io/element/android/features/pin/api/PinStateDataSource.kt

@@ -21,6 +21,6 @@ import kotlinx.coroutines.flow.StateFlow
 interface PinStateDataSource {
     val pinState: StateFlow<PinState>
 
-    fun lock()
-    fun unlock()
+    suspend fun lock()
+    suspend fun unlock()
 }

features/pin/impl/build.gradle.kts

@@ -40,6 +40,7 @@ dependencies {
     implementation(projects.libraries.matrix.api)
     implementation(projects.libraries.matrixui)
     implementation(projects.libraries.designsystem)
+    implementation(projects.libraries.featureflag.api)
 
     testImplementation(libs.test.junit)
     testImplementation(libs.coroutines.test)

features/pin/impl/src/main/kotlin/io/element/android/features/pin/impl/auth/PinAuthenticationPresenter.kt

@@ -19,17 +19,21 @@ package io.element.android.features.pin.impl.auth
 import androidx.compose.runtime.Composable
 import io.element.android.features.pin.api.PinStateDataSource
 import io.element.android.libraries.architecture.Presenter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 class PinAuthenticationPresenter @Inject constructor(
     private val pinStateDataSource: PinStateDataSource,
+    private val coroutineScope: CoroutineScope,
 ) : Presenter<PinAuthenticationState> {
 
     @Composable
     override fun present(): PinAuthenticationState {
+
         fun handleEvents(event: PinAuthenticationEvents) {
             when (event) {
-                PinAuthenticationEvents.Unlock -> pinStateDataSource.unlock()
+                PinAuthenticationEvents.Unlock -> coroutineScope.launch { pinStateDataSource.unlock() }
             }
         }
         return PinAuthenticationState(

features/pin/impl/src/main/kotlin/io/element/android/features/pin/impl/state/DefaultPinStateDataSource.kt

@@ -21,22 +21,30 @@ import io.element.android.features.pin.api.PinState
 import io.element.android.features.pin.api.PinStateDataSource
 import io.element.android.libraries.di.AppScope
 import io.element.android.libraries.di.SingleIn
+import io.element.android.libraries.featureflag.api.FeatureFlagService
+import io.element.android.libraries.featureflag.api.FeatureFlags
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import javax.inject.Inject
 
 @SingleIn(AppScope::class)
 @ContributesBinding(AppScope::class)
-class DefaultPinStateDataSource @Inject constructor() : PinStateDataSource {
+class DefaultPinStateDataSource @Inject constructor(
+    private val featureFlagService: FeatureFlagService,
+) : PinStateDataSource {
 
-    private val _pinState = MutableStateFlow<PinState>(PinState.Locked)
+    private val _pinState = MutableStateFlow<PinState>(PinState.Unlocked)
     override val pinState: StateFlow<PinState> = _pinState
 
-    override fun unlock() {
-        _pinState.value = PinState.Unlocked
+    override suspend fun unlock() {
+        if (featureFlagService.isFeatureEnabled(FeatureFlags.PinUnlock)) {
+            _pinState.value = PinState.Unlocked
+        }
     }
 
-    override fun lock() {
-        _pinState.value = PinState.Locked
+    override suspend fun lock() {
+        if (featureFlagService.isFeatureEnabled(FeatureFlags.PinUnlock)) {
+            _pinState.value = PinState.Locked
+        }
     }
 }

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -49,4 +49,10 @@ enum class FeatureFlags(
         description = "Send and receive voice messages",
         defaultValue = false,
     ),
+    PinUnlock(
+        key = "feature.pinunlock",
+        title = "Pin unlock",
+        description = "Allow user to lock/unlock the app with a pin code or biometrics",
+        defaultValue = false,
+    ),
 }

libraries/featureflag/impl/src/main/kotlin/io/element/android/libraries/featureflag/impl/StaticFeatureFlagProvider.kt

@@ -36,6 +36,7 @@ class StaticFeatureFlagProvider @Inject constructor() :
                 FeatureFlags.Polls -> true
                 FeatureFlags.NotificationSettings -> true
                 FeatureFlags.VoiceMessages -> false
+                FeatureFlags.PinUnlock -> false
             }
         } else {
             false