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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.weblayer_private;
import android.annotation.TargetApi;
import android.app.NotificationManager;
import android.content.SharedPreferences;
import android.os.Build;
import androidx.annotation.StringDef;
import org.chromium.base.ContextUtils;
import org.chromium.components.browser_ui.notifications.NotificationManagerProxyImpl;
import org.chromium.components.browser_ui.notifications.channels.ChannelDefinitions;
import org.chromium.components.browser_ui.notifications.channels.ChannelDefinitions.PredefinedChannel;
import org.chromium.components.browser_ui.notifications.channels.ChannelsInitializer;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
/** Defines notification channels for WebLayer. */
@TargetApi(Build.VERSION_CODES.O)
public class WebLayerNotificationChannels extends ChannelDefinitions {
/**
* Version number identifying the current set of channels. This must be incremented whenever the
* set of channels returned by {@link #getStartupChannelIds()} or {@link #getLegacyChannelIds()}
* changes.
*/
static final int sChannelsVersion = 0;
static final String sChannelsVersionKey = "org.chromium.weblayer.notification_channels_version";
private static class LazyHolder {
private static WebLayerNotificationChannels sInstance = new WebLayerNotificationChannels();
}
public static WebLayerNotificationChannels getInstance() {
return LazyHolder.sInstance;
}
private WebLayerNotificationChannels() {}
/**
* To define a new channel, add the channel ID to this StringDef and add a new entry to
* PredefinedChannels.MAP below with the appropriate channel parameters. To remove an existing
* channel, remove the ID from this StringDef, remove its entry from Predefined Channels.MAP,
* and add it to the return value of {@link #getLegacyChannelIds()}.
*/
@StringDef({ChannelId.ACTIVE_DOWNLOADS, ChannelId.COMPLETED_DOWNLOADS, ChannelId.MEDIA_PLAYBACK,
ChannelId.WEBRTC_CAM_AND_MIC})
@Retention(RetentionPolicy.SOURCE)
public @interface ChannelId {
String ACTIVE_DOWNLOADS = "org.chromium.weblayer.active_downloads";
String COMPLETED_DOWNLOADS = "org.chromium.weblayer.completed_downloads";
String MEDIA_PLAYBACK = "org.chromium.weblayer.media_playback";
String WEBRTC_CAM_AND_MIC = "org.chromium.weblayer.webrtc_cam_and_mic";
}
@StringDef({ChannelGroupId.WEBLAYER})
@Retention(RetentionPolicy.SOURCE)
public @interface ChannelGroupId {
String WEBLAYER = "org.chromium.weblayer";
}
// Map defined in static inner class so it's only initialized lazily.
@TargetApi(Build.VERSION_CODES.N) // for NotificationManager.IMPORTANCE_* constants
private static class PredefinedChannels {
static final Map<String, PredefinedChannel> MAP;
static {
Map<String, PredefinedChannel> map = new HashMap<>();
map.put(ChannelId.ACTIVE_DOWNLOADS,
PredefinedChannel.create(ChannelId.ACTIVE_DOWNLOADS,
R.string.notification_category_downloads,
NotificationManager.IMPORTANCE_LOW, ChannelGroupId.WEBLAYER));
map.put(ChannelId.COMPLETED_DOWNLOADS,
PredefinedChannel.create(ChannelId.COMPLETED_DOWNLOADS,
R.string.notification_category_completed_downloads,
NotificationManager.IMPORTANCE_LOW, ChannelGroupId.WEBLAYER));
map.put(ChannelId.MEDIA_PLAYBACK,
PredefinedChannel.create(ChannelId.MEDIA_PLAYBACK,
R.string.notification_category_media_playback,
NotificationManager.IMPORTANCE_LOW, ChannelGroupId.WEBLAYER));
map.put(ChannelId.WEBRTC_CAM_AND_MIC,
PredefinedChannel.create(ChannelId.WEBRTC_CAM_AND_MIC,
R.string.notification_category_webrtc_cam_and_mic,
NotificationManager.IMPORTANCE_LOW, ChannelGroupId.WEBLAYER));
MAP = Collections.unmodifiableMap(map);
}
}
// Map defined in static inner class so it's only initialized lazily.
private static class PredefinedChannelGroups {
static final Map<String, PredefinedChannelGroup> MAP;
static {
Map<String, PredefinedChannelGroup> map = new HashMap<>();
map.put(ChannelGroupId.WEBLAYER,
new PredefinedChannelGroup(ChannelGroupId.WEBLAYER,
R.string.weblayer_notification_channel_group_name));
MAP = Collections.unmodifiableMap(map);
}
}
@Override
public Set<String> getAllChannelGroupIds() {
return PredefinedChannelGroups.MAP.keySet();
}
@Override
public Set<String> getAllChannelIds() {
return PredefinedChannels.MAP.keySet();
}
@Override
public Set<String> getStartupChannelIds() {
return Collections.emptySet();
}
@Override
public List<String> getLegacyChannelIds() {
return Collections.emptyList();
}
@Override
public PredefinedChannelGroup getChannelGroup(@ChannelGroupId String groupId) {
return PredefinedChannelGroups.MAP.get(groupId);
}
@Override
public PredefinedChannel getChannelFromId(@ChannelId String channelId) {
return PredefinedChannels.MAP.get(channelId);
}
/**
* Updates the user-facing channel names after a locale switch.
*/
public static void onLocaleChanged() {
if (!isAtLeastO()) return;
getChannelsInitializer().updateLocale(ContextUtils.getApplicationContext().getResources());
}
/**
* Updates the registered channels based on {@link sChannelsVersion}.
*/
public static void updateChannelsIfNecessary() {
if (!isAtLeastO()) return;
SharedPreferences prefs = ContextUtils.getAppSharedPreferences();
if (prefs.getInt(sChannelsVersionKey, -1) == sChannelsVersion) return;
ChannelsInitializer initializer = getChannelsInitializer();
initializer.deleteLegacyChannels();
initializer.initializeStartupChannels();
prefs.edit().putInt(sChannelsVersionKey, sChannelsVersion).apply();
}
private static boolean isAtLeastO() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.O;
}
private static ChannelsInitializer getChannelsInitializer() {
assert isAtLeastO();
return new ChannelsInitializer(
new NotificationManagerProxyImpl(ContextUtils.getApplicationContext()),
getInstance(), ContextUtils.getApplicationContext().getResources());
}
}
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