Add Fast Pair devices "See all" page.

Bug: 296507968
Test: FastPairDeviceGroupControllerTest
Change-Id: I3939f65ac9262673d99e7041df5b9dc04bd43722
diff --git a/res/values/strings.xml b/res/values/strings.xml
index d87e1de..b70e3b2 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -6784,6 +6784,8 @@
     <string name="help_url_adaptive_sleep" translatable="false" />
     <!-- Help URL, Previously connected bluetooth devices [DO NOT TRANSLATE] -->
     <string name="help_url_previously_connected_devices" translatable="false"></string>
+    <!-- Help URL, Fast Pair devices on Connected device settings [DO NOT TRANSLATE] -->
+    <string name="help_url_connected_devices_fast_pair_devices" translatable="false"></string>
     <!-- Help URL, Top level privacy settings [DO NOT TRANSLATE] -->
     <string name="help_url_privacy_dashboard" translatable="false"></string>
 
diff --git a/res/xml/fast_pair_devices.xml b/res/xml/fast_pair_devices.xml
new file mode 100644
index 0000000..f549ff4
--- /dev/null
+++ b/res/xml/fast_pair_devices.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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.
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceCategory
+        android:key="fast_pair_device_list"
+        settings:controller="com.android.settings.connecteddevice.fastpair.FastPairDeviceGroupController"/>
+
+</PreferenceScreen>
\ No newline at end of file
diff --git a/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceDashboardFragment.java b/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceDashboardFragment.java
new file mode 100644
index 0000000..2c6c112
--- /dev/null
+++ b/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceDashboardFragment.java
@@ -0,0 +1,55 @@
+/*
+ * 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.settings.connecteddevice.fastpair;
+
+import android.app.settings.SettingsEnums;
+
+import com.android.settings.R;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.search.SearchIndexable;
+
+/** This fragment contains list of available FastPair device */
+@SearchIndexable(forTarget = SearchIndexable.MOBILE)
+public class FastPairDeviceDashboardFragment extends DashboardFragment {
+
+    private static final String TAG = "FastPairDeviceFrag";
+
+    @Override
+    public int getHelpResource() {
+        return R.string.help_url_connected_devices_fast_pair_devices;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.fast_pair_devices;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.FAST_PAIR_DEVICES;
+    }
+
+    /** For Search. */
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.fast_pair_devices);
+}
diff --git a/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupController.java b/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupController.java
new file mode 100644
index 0000000..ac117f1
--- /dev/null
+++ b/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupController.java
@@ -0,0 +1,143 @@
+/*
+ * 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.settings.connecteddevice.fastpair;
+
+import android.bluetooth.BluetoothAdapter;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.PackageManager;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.DefaultLifecycleObserver;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.connecteddevice.DevicePreferenceCallback;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.flags.Flags;
+import com.android.settings.overlay.FeatureFactory;
+
+/**
+ * Controller to maintain the {@link PreferenceGroup} for all Fast Pair devices. It uses {@link
+ * DevicePreferenceCallback} to add/remove {@link Preference}
+ */
+public class FastPairDeviceGroupController extends BasePreferenceController
+        implements PreferenceControllerMixin, DefaultLifecycleObserver, DevicePreferenceCallback {
+
+    private static final String KEY = "fast_pair_device_list";
+
+    @VisibleForTesting PreferenceGroup mPreferenceGroup;
+    private final FastPairDeviceUpdater mFastPairDeviceUpdater;
+    private final BluetoothAdapter mBluetoothAdapter;
+    @VisibleForTesting IntentFilter mIntentFilter;
+
+    @VisibleForTesting
+    BroadcastReceiver mReceiver =
+            new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    updatePreferenceVisibility();
+                }
+            };
+
+    public FastPairDeviceGroupController(Context context) {
+        super(context, KEY);
+        if (Flags.enableSubsequentPairSettingsIntegration()) {
+            FastPairFeatureProvider fastPairFeatureProvider =
+                    FeatureFactory.getFeatureFactory().getFastPairFeatureProvider();
+            mFastPairDeviceUpdater =
+                    fastPairFeatureProvider.getFastPairDeviceUpdater(context, this);
+        } else {
+            mFastPairDeviceUpdater = null;
+        }
+        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+        mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
+    }
+
+    @Override
+    public void onStart(@NonNull LifecycleOwner owner) {
+        if (mFastPairDeviceUpdater != null) {
+            mFastPairDeviceUpdater.registerCallback();
+        }
+        mContext.registerReceiver(mReceiver, mIntentFilter, Context.RECEIVER_EXPORTED_UNAUDITED);
+    }
+
+    @Override
+    public void onStop(@NonNull LifecycleOwner owner) {
+        if (mFastPairDeviceUpdater != null) {
+            mFastPairDeviceUpdater.unregisterCallback();
+        }
+        mContext.unregisterReceiver(mReceiver);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        mPreferenceGroup = screen.findPreference(KEY);
+        mPreferenceGroup.setVisible(false);
+
+        if (isAvailable()) {
+            final Context context = screen.getContext();
+            mFastPairDeviceUpdater.setPreferenceContext(context);
+            mFastPairDeviceUpdater.forceUpdate();
+        }
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
+                        && mFastPairDeviceUpdater != null)
+                ? AVAILABLE
+                : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    @Override
+    public void onDeviceAdded(Preference preference) {
+        if (preference == null) return;
+        mPreferenceGroup.addPreference(preference);
+        updatePreferenceVisibility();
+    }
+
+    @Override
+    public void onDeviceRemoved(Preference preference) {
+        if (preference == null) return;
+        mPreferenceGroup.removePreference(preference);
+        updatePreferenceVisibility();
+    }
+
+    private void updatePreferenceVisibility() {
+        mPreferenceGroup.setVisible(
+                mBluetoothAdapter != null
+                        && mBluetoothAdapter.isEnabled()
+                        && mPreferenceGroup.getPreferenceCount() > 0);
+    }
+
+    @VisibleForTesting
+    public void setPreferenceGroup(PreferenceGroup preferenceGroup) {
+        mPreferenceGroup = preferenceGroup;
+    }
+}
diff --git a/tests/robotests/Android.bp b/tests/robotests/Android.bp
index f620348..910bbbd 100644
--- a/tests/robotests/Android.bp
+++ b/tests/robotests/Android.bp
@@ -58,6 +58,9 @@
         "androidx.test.ext.junit",
         "androidx.test.rules",
         "androidx.test.runner",
+        "flag-junit",
+        "aconfig_settings_flags_lib",
+        "platform-test-annotations",
     ],
 
     libs: [
diff --git a/tests/robotests/AndroidManifest.xml b/tests/robotests/AndroidManifest.xml
index e0050ef..22fce4f 100644
--- a/tests/robotests/AndroidManifest.xml
+++ b/tests/robotests/AndroidManifest.xml
@@ -1,7 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.
+-->
+
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
 	  coreApp="true"
           package="com.android.settings">
+    <uses-permission android:name="android.permission.READ_DEVICE_CONFIG" />
 
     <application/>
 
diff --git a/tests/robotests/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupControllerTest.java b/tests/robotests/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupControllerTest.java
new file mode 100644
index 0000000..bf40bd2
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/connecteddevice/fastpair/FastPairDeviceGroupControllerTest.java
@@ -0,0 +1,157 @@
+/*
+ * 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.settings.connecteddevice.fastpair;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.bluetooth.BluetoothAdapter;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.platform.test.annotations.RequiresFlagsDisabled;
+import android.platform.test.annotations.RequiresFlagsEnabled;
+import android.platform.test.flag.junit.CheckFlagsRule;
+import android.platform.test.flag.junit.DeviceFlagsValueProvider;
+
+import androidx.lifecycle.LifecycleOwner;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceGroup;
+
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.flags.Flags;
+import com.android.settings.testutils.FakeFeatureFactory;
+import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadow.api.Shadow;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = ShadowBluetoothAdapter.class)
+public class FastPairDeviceGroupControllerTest {
+
+    @Rule public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    @Rule
+    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();
+
+    @Mock private DashboardFragment mDashboardFragment;
+    @Mock private FastPairDeviceUpdater mFastPairDeviceUpdater;
+    @Mock private PackageManager mPackageManager;
+    private ShadowBluetoothAdapter mShadowBluetoothAdapter;
+    private Context mContext;
+    private FastPairDeviceGroupController mFastPairDeviceGroupController;
+    private PreferenceGroup mPreferenceGroup;
+    private LifecycleOwner mLifecycleOwner;
+    private Lifecycle mLifecycle;
+
+    @Before
+    public void setUp() {
+        mContext = spy(RuntimeEnvironment.application);
+        mLifecycleOwner = () -> mLifecycle;
+        mLifecycle = new Lifecycle(mLifecycleOwner);
+        doReturn(mContext).when(mDashboardFragment).getContext();
+        doReturn(mPackageManager).when(mContext).getPackageManager();
+        FastPairFeatureProvider provider =
+                FakeFeatureFactory.setupForTest().getFastPairFeatureProvider();
+        doReturn(mFastPairDeviceUpdater).when(provider).getFastPairDeviceUpdater(any(), any());
+        mFastPairDeviceGroupController = new FastPairDeviceGroupController(mContext);
+        mPreferenceGroup = spy(new PreferenceCategory(mContext));
+        mPreferenceGroup.setVisible(false);
+        mFastPairDeviceGroupController.setPreferenceGroup(mPreferenceGroup);
+        mShadowBluetoothAdapter = Shadow.extract(BluetoothAdapter.getDefaultAdapter());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testRegister() {
+        // register the callback in onStart()
+        mFastPairDeviceGroupController.onStart(mLifecycleOwner);
+        verify(mFastPairDeviceUpdater).registerCallback();
+        verify(mContext)
+                .registerReceiver(
+                        mFastPairDeviceGroupController.mReceiver,
+                        mFastPairDeviceGroupController.mIntentFilter,
+                        Context.RECEIVER_EXPORTED);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testUnregister() {
+        // register it first
+        mContext.registerReceiver(
+                mFastPairDeviceGroupController.mReceiver, null, Context.RECEIVER_EXPORTED);
+
+        // unregister the callback in onStop()
+        mFastPairDeviceGroupController.onStop(mLifecycleOwner);
+        verify(mFastPairDeviceUpdater).unregisterCallback();
+        verify(mContext).unregisterReceiver(mFastPairDeviceGroupController.mReceiver);
+    }
+
+    @Test
+    @RequiresFlagsDisabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testGetAvailabilityStatus_noFastPairFeature_returnUnSupported() {
+        doReturn(true).when(mPackageManager).hasSystemFeature(PackageManager.FEATURE_BLUETOOTH);
+
+        assertThat(mFastPairDeviceGroupController.getAvailabilityStatus())
+                .isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testGetAvailabilityStatus_noBluetoothFeature_returnUnSupported() {
+        doReturn(false).when(mPackageManager).hasSystemFeature(PackageManager.FEATURE_BLUETOOTH);
+
+        assertThat(mFastPairDeviceGroupController.getAvailabilityStatus())
+                .isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testGetAvailabilityStatus_withBluetoothFastPairFeature_returnSupported() {
+        doReturn(true).when(mPackageManager).hasSystemFeature(PackageManager.FEATURE_BLUETOOTH);
+
+        assertThat(mFastPairDeviceGroupController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_SUBSEQUENT_PAIR_SETTINGS_INTEGRATION)
+    public void testUpdatePreferenceVisibility_bluetoothIsDisable_shouldHidePreference() {
+        mShadowBluetoothAdapter.setEnabled(false);
+        Intent intent = new Intent(BluetoothAdapter.ACTION_STATE_CHANGED);
+        mContext.sendBroadcast(intent);
+
+        assertThat(mPreferenceGroup.isVisible()).isFalse();
+    }
+}