src/com/android/settings/notification/app/ConversationListPreferenceController.java

/*
 * Copyright (C) 2020 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.app;

import android.app.settings.SettingsEnums;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ShortcutInfo;
import android.os.Bundle;
import android.os.UserHandle;
import android.provider.Settings;
import android.service.notification.ConversationChannelWrapper;
import android.text.TextUtils;

import androidx.preference.Preference;
import androidx.preference.PreferenceGroup;

import com.android.settings.R;
import com.android.settings.applications.AppInfoBase;
import com.android.settings.core.SubSettingLauncher;
import com.android.settings.notification.NotificationBackend;
import com.android.settingslib.core.AbstractPreferenceController;

import java.text.Collator;
import java.util.Comparator;
import java.util.List;

public abstract class ConversationListPreferenceController extends AbstractPreferenceController {

    private static final String KEY = "all_conversations";

    protected final NotificationBackend mBackend;

    public ConversationListPreferenceController(Context context,
            NotificationBackend backend) {
        super(context);
        mBackend = backend;
    }

    @Override
    public String getPreferenceKey() {
        return KEY;
    }

    @Override
    public boolean isAvailable() {
        return true;
    }

    protected void populateList(List<ConversationChannelWrapper> conversations,
            PreferenceGroup containerGroup) {
        // TODO: if preference has children, compare with newly loaded list
        containerGroup.removeAll();
        if (conversations != null) {
            populateConversations(conversations, containerGroup);
        }

        if (containerGroup.getPreferenceCount() == 0) {
            containerGroup.setVisible(false);
        } else {
            containerGroup.setVisible(true);
            Preference summaryPref = getSummaryPreference();
            if (summaryPref != null) {
                containerGroup.addPreference(summaryPref);
            }
        }
    }

    abstract Preference getSummaryPreference();

    abstract boolean matchesFilter(ConversationChannelWrapper conversation);

    protected void populateConversations(List<ConversationChannelWrapper> conversations,
            PreferenceGroup containerGroup) {
        int order = 100;
        for (ConversationChannelWrapper conversation : conversations) {
            if (conversation.getNotificationChannel().isDemoted()
                    || !matchesFilter(conversation)) {
                continue;
            }
            containerGroup.addPreference(createConversationPref(conversation, order++));
        }
    }

    protected Preference createConversationPref(final ConversationChannelWrapper conversation,
            int order) {
        Preference pref = new Preference(mContext);
        pref.setOrder(order);

        pref.setTitle(getTitle(conversation));
        pref.setSummary(getSummary(conversation));
        pref.setIcon(mBackend.getConversationDrawable(mContext, conversation.getShortcutInfo(),
                conversation.getPkg(), conversation.getUid(),
                conversation.getNotificationChannel().isImportantConversation()));
        pref.setKey(conversation.getNotificationChannel().getId());
        pref.setOnPreferenceClickListener(preference -> {
            getSubSettingLauncher(conversation, pref.getTitle()).launch();
            return true;
        });

        return pref;
    }

    CharSequence getSummary(ConversationChannelWrapper conversation) {
        return TextUtils.isEmpty(conversation.getGroupLabel())
                ? conversation.getParentChannelLabel()
                : mContext.getString(R.string.notification_conversation_summary,
                conversation.getParentChannelLabel(), conversation.getGroupLabel());
    }

    CharSequence getTitle(ConversationChannelWrapper conversation) {
        ShortcutInfo si = conversation.getShortcutInfo();
        return si != null
                ? si.getLabel()
                : conversation.getNotificationChannel().getName();
    }

    SubSettingLauncher getSubSettingLauncher(ConversationChannelWrapper conversation,
            CharSequence title) {
        Bundle channelArgs = new Bundle();
        channelArgs.putInt(AppInfoBase.ARG_PACKAGE_UID, conversation.getUid());
        channelArgs.putString(AppInfoBase.ARG_PACKAGE_NAME, conversation.getPkg());
        channelArgs.putString(Settings.EXTRA_CHANNEL_ID,
                conversation.getNotificationChannel().getId());
        channelArgs.putString(Settings.EXTRA_CONVERSATION_ID,
                conversation.getNotificationChannel().getConversationId());

        return new SubSettingLauncher(mContext)
                .setDestination(ChannelNotificationSettings.class.getName())
                .setArguments(channelArgs)
                .setExtras(channelArgs)
                .setUserHandle(UserHandle.getUserHandleForUid(conversation.getUid()))
                .setTitleText(title)
                .setSourceMetricsCategory(SettingsEnums.NOTIFICATION_CONVERSATION_LIST_SETTINGS);
    }

    protected Comparator<ConversationChannelWrapper> mConversationComparator =
            new Comparator<ConversationChannelWrapper>() {
                private final Collator sCollator = Collator.getInstance();
                @Override
                public int compare(ConversationChannelWrapper o1, ConversationChannelWrapper o2) {
                    if (o1.getShortcutInfo() != null && o2.getShortcutInfo() == null) {
                        return -1;
                    }
                    if (o1.getShortcutInfo() == null && o2.getShortcutInfo() != null) {
                        return 1;
                    }
                    if (o1.getShortcutInfo() == null && o2.getShortcutInfo() == null) {
                        return o1.getNotificationChannel().getId().compareTo(
                                o2.getNotificationChannel().getId());
                    }
                    return sCollator.compare(o1.getShortcutInfo().getLabel(),
                            o2.getShortcutInfo().getLabel());
                }
            };
}