Add DeviceEntryFingerprintAuthRepository to act as source of truth for keyguard FP auth state

Right now, it is a wrapper around KeyguardUpdateMonitor, we can move FP
auth state out of KUM in the next refactor

Bug: 262838215
Test: atest DeviceEntryFingerprintAuthRepositoryTest
Change-Id: I0bf83a0ca8801bc6d8c45c610a1ef898e292a7a2

packages/SystemUI/src/com/android/systemui/keyguard/data/repository/DeviceEntryFingerprintAuthRepository.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.keyguard.data.repository
+
+import android.hardware.biometrics.BiometricSourceType
+import com.android.keyguard.KeyguardUpdateMonitor
+import com.android.keyguard.KeyguardUpdateMonitorCallback
+import com.android.systemui.common.coroutine.ChannelExt.trySendWithFailureLogging
+import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
+import com.android.systemui.dagger.SysUISingleton
+import javax.inject.Inject
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.Flow
+
+/** Encapsulates state about device entry fingerprint auth mechanism. */
+interface DeviceEntryFingerprintAuthRepository {
+    /** Whether the device entry fingerprint auth is locked out. */
+    val isLockedOut: Flow<Boolean>
+}
+
+/**
+ * Implementation of [DeviceEntryFingerprintAuthRepository] that uses [KeyguardUpdateMonitor] as the
+ * source of truth.
+ *
+ * Dependency on [KeyguardUpdateMonitor] will be removed once fingerprint auth state is moved out of
+ * [KeyguardUpdateMonitor]
+ */
+@SysUISingleton
+class DeviceEntryFingerprintAuthRepositoryImpl
+@Inject
+constructor(
+    val keyguardUpdateMonitor: KeyguardUpdateMonitor,
+) : DeviceEntryFingerprintAuthRepository {
+
+    override val isLockedOut: Flow<Boolean> = conflatedCallbackFlow {
+        val sendLockoutUpdate =
+            fun() {
+                trySendWithFailureLogging(
+                    keyguardUpdateMonitor.isFingerprintLockedOut,
+                    TAG,
+                    "onLockedOutStateChanged"
+                )
+            }
+        val callback =
+            object : KeyguardUpdateMonitorCallback() {
+                override fun onLockedOutStateChanged(biometricSourceType: BiometricSourceType?) {
+                    if (biometricSourceType == BiometricSourceType.FINGERPRINT) {
+                        sendLockoutUpdate()
+                    }
+                }
+            }
+        keyguardUpdateMonitor.registerCallback(callback)
+        sendLockoutUpdate()
+        awaitClose { keyguardUpdateMonitor.removeCallback(callback) }
+    }
+
+    companion object {
+        const val TAG = "DeviceEntryFingerprintAuthRepositoryImpl"
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/keyguard/data/repository/DeviceEntryFingerprintAuthRepositoryTest.kt

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.keyguard.data.repository
+
+import android.hardware.biometrics.BiometricSourceType
+import androidx.test.filters.SmallTest
+import com.android.keyguard.KeyguardUpdateMonitor
+import com.android.keyguard.KeyguardUpdateMonitorCallback
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.util.mockito.whenever
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.mockito.ArgumentCaptor
+import org.mockito.Captor
+import org.mockito.Mock
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+@OptIn(ExperimentalCoroutinesApi::class)
+@SmallTest
+@RunWith(JUnit4::class)
+class DeviceEntryFingerprintAuthRepositoryTest : SysuiTestCase() {
+    @Mock private lateinit var keyguardUpdateMonitor: KeyguardUpdateMonitor
+    @Captor private lateinit var callbackCaptor: ArgumentCaptor<KeyguardUpdateMonitorCallback>
+
+    private lateinit var testScope: TestScope
+
+    private lateinit var underTest: DeviceEntryFingerprintAuthRepository
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        testScope = TestScope()
+
+        underTest = DeviceEntryFingerprintAuthRepositoryImpl(keyguardUpdateMonitor)
+    }
+
+    @After
+    fun tearDown() {
+        verify(keyguardUpdateMonitor).removeCallback(callbackCaptor.value)
+    }
+
+    @Test
+    fun isLockedOut_whenFingerprintLockoutStateChanges_emitsNewValue() =
+        testScope.runTest {
+            val isLockedOutValue = collectLastValue(underTest.isLockedOut)
+            runCurrent()
+
+            verify(keyguardUpdateMonitor).registerCallback(callbackCaptor.capture())
+            val callback = callbackCaptor.value
+            whenever(keyguardUpdateMonitor.isFingerprintLockedOut).thenReturn(true)
+
+            callback.onLockedOutStateChanged(BiometricSourceType.FACE)
+            assertThat(isLockedOutValue()).isFalse()
+
+            callback.onLockedOutStateChanged(BiometricSourceType.FINGERPRINT)
+            assertThat(isLockedOutValue()).isTrue()
+
+            whenever(keyguardUpdateMonitor.isFingerprintLockedOut).thenReturn(false)
+            callback.onLockedOutStateChanged(BiometricSourceType.FINGERPRINT)
+            assertThat(isLockedOutValue()).isFalse()
+        }
+}