Create a new link preference for priority modes entry

Test: ZenModesSummaryHelperTest
Test: manual. Successfully search for both 'event' and 'priority'
Flag: android.app.modes_ui
Bug: 341726633
Change-Id: Ib7bd1a5c2f7b06b1728a66f7a9cef53cd45acc0b

src/com/android/settings/notification/modes/ZenModesLinkPreferenceController.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2024 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.notification.modes;
+
+import android.app.Flags;
+import android.app.NotificationManager;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.UserHandle;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnPause;
+import com.android.settingslib.core.lifecycle.events.OnResume;
+
+public class ZenModesLinkPreferenceController extends BasePreferenceController
+        implements LifecycleObserver, OnResume, OnPause {
+
+    private SettingObserver mSettingObserver;
+    private ZenModeSummaryHelper mSummaryBuilder;
+    private NotificationManager mNm;
+
+    public ZenModesLinkPreferenceController(Context context, String key) {
+        super(context, key);
+        mSummaryBuilder = new ZenModeSummaryHelper(context, ZenHelperBackend.getInstance(context));
+        mNm = mContext.getSystemService(NotificationManager.class);
+    }
+
+    @Override
+    @AvailabilityStatus
+    public int getAvailabilityStatus() {
+        return Flags.modesUi() ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        Preference preference = screen.findPreference(getPreferenceKey());
+        mSettingObserver = new SettingObserver(preference);
+    }
+
+    @Override
+    public void onResume() {
+        if (mSettingObserver != null) {
+            mSettingObserver.register(mContext.getContentResolver());
+        }
+    }
+
+    @Override
+    public void onPause() {
+        if (mSettingObserver != null) {
+            mSettingObserver.unregister(mContext.getContentResolver());
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        preference.setSummary(mSummaryBuilder.getSoundSummary(
+                Settings.Global.getInt(mContext.getContentResolver(),
+                        Settings.Global.ZEN_MODE,
+                        Settings.Global.ZEN_MODE_OFF),
+                mNm.getZenModeConfig()));
+    }
+
+    class SettingObserver extends ContentObserver {
+        private final Uri ZEN_MODE_URI = Settings.Global.getUriFor(Settings.Global.ZEN_MODE);
+        private final Uri ZEN_MODE_CONFIG_ETAG_URI = Settings.Global.getUriFor(
+                Settings.Global.ZEN_MODE_CONFIG_ETAG);
+
+        private final Preference mPreference;
+
+        public SettingObserver(Preference preference) {
+            super(new Handler());
+            mPreference = preference;
+        }
+
+        public void register(ContentResolver cr) {
+            cr.registerContentObserver(ZEN_MODE_URI, false, this, UserHandle.USER_ALL);
+            cr.registerContentObserver(ZEN_MODE_CONFIG_ETAG_URI, false, this, UserHandle.USER_ALL);
+        }
+
+        public void unregister(ContentResolver cr) {
+            cr.unregisterContentObserver(this);
+        }
+
+        @Override
+        public void onChange(boolean selfChange, Uri uri) {
+            super.onChange(selfChange, uri);
+            if (ZEN_MODE_URI.equals(uri)) {
+                updateState(mPreference);
+            }
+
+            if (ZEN_MODE_CONFIG_ETAG_URI.equals(uri)) {
+                updateState(mPreference);
+            }
+        }
+    }
+}