Added CallLogConfig.

/*

 * Copyright (C) 2018 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.dialer.calllog;

import android.content.SharedPreferences;

import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor;

import com.android.dialer.configprovider.ConfigProvider;

import com.android.dialer.storage.Unencrypted;

import com.google.common.util.concurrent.ListenableFuture;

import com.google.common.util.concurrent.ListeningExecutorService;

import javax.inject.Inject;

/**

 * Determines if new call log components are enabled.

 *

 * <p>When the underlying flag values from the {@link ConfigProvider} changes, it is necessary to do

 * work such as registering/unregistering content observers, and this class is responsible for

 * coordinating that work.

 *

 * <p>New UI application components should use this class instead of reading flags directly from the

 * {@link ConfigProvider}.

 */

public final class CallLogConfig {

  private static final String NEW_CALL_LOG_FRAGMENT_ENABLED_PREF_KEY = "newCallLogFragmentEnabled";

  private static final String NEW_VOICEMAIL_FRAGMENT_ENABLED_PREF_KEY =

      "newVoicemailFragmentEnabled";

  private static final String NEW_PEER_ENABLED_PREF_KEY = "newPeerEnabled";

  private static final String NEW_CALL_LOG_FRAMEWORK_ENABLED_PREF_KEY =

      "newCallLogFrameworkEnabled";

  private final SharedPreferences sharedPreferences;

  private final ConfigProvider configProvider;

  private final ListeningExecutorService backgroundExecutor;

  @Inject

  CallLogConfig(

      @Unencrypted SharedPreferences sharedPreferences,

      ConfigProvider configProvider,

      @BackgroundExecutor ListeningExecutorService backgroundExecutor) {

    this.sharedPreferences = sharedPreferences;

    this.configProvider = configProvider;

    this.backgroundExecutor = backgroundExecutor;

  }

  /**

   * Updates the config values. This may kick off a lot of work so should be done infrequently, for

   * example by a scheduled job or broadcast receiver which rarely fires.

   */

  public ListenableFuture<Void> update() {

    return backgroundExecutor.submit(

        () -> {

          boolean newCallLogFragmentEnabledInConfigProvider =

              configProvider.getBoolean("new_call_log_fragment_enabled", false);

          boolean newVoicemailFragmentEnabledInConfigProvider =

              configProvider.getBoolean("new_voicemail_fragment_enabled", false);

          boolean newPeerEnabledInConfigProvider =

              configProvider.getBoolean("nui_peer_enabled", false);

          boolean isCallLogFrameworkEnabled = isCallLogFrameworkEnabled();

          boolean callLogFrameworkShouldBeEnabled =

              newCallLogFragmentEnabledInConfigProvider

                  || newVoicemailFragmentEnabledInConfigProvider

                  || newPeerEnabledInConfigProvider;

          if (callLogFrameworkShouldBeEnabled && !isCallLogFrameworkEnabled) {

            enableFramework();

            // Reflect the flag changes only after the framework is enabled.

            sharedPreferences

                .edit()

                .putBoolean(

                    NEW_CALL_LOG_FRAGMENT_ENABLED_PREF_KEY,

                    newCallLogFragmentEnabledInConfigProvider)

                .putBoolean(

                    NEW_VOICEMAIL_FRAGMENT_ENABLED_PREF_KEY,

                    newVoicemailFragmentEnabledInConfigProvider)

                .putBoolean(NEW_PEER_ENABLED_PREF_KEY, newPeerEnabledInConfigProvider)

                .putBoolean(NEW_CALL_LOG_FRAMEWORK_ENABLED_PREF_KEY, true)

                .apply();

          } else if (!callLogFrameworkShouldBeEnabled && isCallLogFrameworkEnabled) {

            // Reflect the flag changes before disabling the framework.

            sharedPreferences

                .edit()

                .putBoolean(NEW_CALL_LOG_FRAGMENT_ENABLED_PREF_KEY, false)

                .putBoolean(NEW_VOICEMAIL_FRAGMENT_ENABLED_PREF_KEY, false)

                .putBoolean(NEW_PEER_ENABLED_PREF_KEY, false)

                .putBoolean(NEW_CALL_LOG_FRAMEWORK_ENABLED_PREF_KEY, false)

                .apply();

            disableFramework();

          } else {

            // We didn't need to enable/disable the framework, but we still need to update the

            // individual flags.

            sharedPreferences

                .edit()

                .putBoolean(

                    NEW_CALL_LOG_FRAGMENT_ENABLED_PREF_KEY,

                    newCallLogFragmentEnabledInConfigProvider)

                .putBoolean(

                    NEW_VOICEMAIL_FRAGMENT_ENABLED_PREF_KEY,

                    newVoicemailFragmentEnabledInConfigProvider)

                .putBoolean(NEW_PEER_ENABLED_PREF_KEY, newPeerEnabledInConfigProvider)

                .apply();

          }

          return null;

        });

  }

  private void enableFramework() {

    // TODO(zachh): Register content observers, etc.

  }

  private void disableFramework() {

    // TODO(zachh): Unregister content observers, delete databases, etc.

  }

  public boolean isNewCallLogFragmentEnabled() {

    return sharedPreferences.getBoolean(NEW_CALL_LOG_FRAGMENT_ENABLED_PREF_KEY, false);

  }

  public boolean isNewVoicemailFragmentEnabled() {

    return sharedPreferences.getBoolean(NEW_VOICEMAIL_FRAGMENT_ENABLED_PREF_KEY, false);

  }

  public boolean isNewPeerEnabled() {

    return sharedPreferences.getBoolean(NEW_PEER_ENABLED_PREF_KEY, false);

  }

  /**

   * Returns true if the new call log framework is enabled, meaning that content observers are

   * firing and PhoneLookupHistory is being populated, etc.

   */

  public boolean isCallLogFrameworkEnabled() {

    return sharedPreferences.getBoolean(NEW_CALL_LOG_FRAMEWORK_ENABLED_PREF_KEY, false);

  }

}