content: /*
   * Copyright (C) 2014 AChep@xda <artemchep@gmail.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA  02110-1301, USA.
   */
  package com.achep.base.ui.preferences;
  
  import android.content.Context;
  import androidx.annotation.NonNull;
  import android.widget.CompoundButton;
  
  import com.achep.base.content.ConfigBase;
  import com.achep.base.interfaces.ICheckable;
  
  /**
   * @author Artem Chepurnoy
   */
  public class Enabler {
  
      private final String mKey;
      private final Context mContext;
      private final ConfigBase mConfig;
      private final ConfigBase.Option mOption;
      private final ConfigBase.OnConfigChangedListener mConfigListener =
              new ConfigBase.OnConfigChangedListener() {
  
                  @Override
                  public void onConfigChanged(@NonNull ConfigBase config,
                                              @NonNull String key,
                                              @NonNull Object value) {
                      if (mKey.equals(key)) updateCheckableState();
                  }
              };
  
      private final CompoundButton.OnCheckedChangeListener mCheckableListener
              = new CompoundButton.OnCheckedChangeListener() {
  
          @Override
          public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
              if (mBroadcasting) {
                  return;
              }
  
              mOption.write(mConfig, mContext, isChecked, mConfigListener);
          }
      };
  
      private ICheckable mCheckable;
      private boolean mBroadcasting;
  
      public Enabler(@NonNull Context context,
                     @NonNull ConfigBase config,
                     @NonNull String key,
                     @NonNull ICheckable checkable) {
          mKey = key;
          mConfig = config;
          mContext = context;
          mCheckable = checkable;
  
          mOption = mConfig.getOption(mKey);
      }
  
      /**
       * Starts listening to the config's changes and updates corresponding
       * {@link com.achep.base.interfaces.ICheckable compound button}.
       * You must call {@link #stop() stop} method later!
       */
      public void start() {
          mConfig.registerListener(mConfigListener);
          mCheckable.setOnCheckedChangeListener(mCheckableListener);
          updateCheckableState();
      }
  
      /**
       * Stops listening to the config's changes.
       */
      public void stop() {
          mConfig.unregisterListener(mConfigListener);
          mCheckable.setOnCheckedChangeListener(null);
      }
  
      public void setCheckable(@NonNull ICheckable checkable) {
          if (mCheckable == checkable) {
              return;
          }
  
          mCheckable.setOnCheckedChangeListener(null);
          mCheckable = checkable;
          mCheckable.setOnCheckedChangeListener(mCheckableListener);
          updateCheckableState();
      }
  
      private void updateCheckableState() {
          mBroadcasting = true;
          mCheckable.setChecked((boolean) mOption.read(mConfig));
          mBroadcasting = false;
      }
  
  }
  